EP3894206A1

EP3894206A1 - Device having a guillotine device for cutting to length for manufacturing a packaging material product from a fibre starting material and method for manufacturing a packaging material product

Info

Publication number: EP3894206A1
Application number: EP19827660.2A
Authority: EP
Inventors: Marco Schwarberg; Bastian Schalk; Vitali KREBS
Original assignee: Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH
Current assignee: Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH
Priority date: 2018-12-11
Filing date: 2019-12-11
Publication date: 2021-10-20
Also published as: US20220242082A1; WO2020120579A1; DE102018009678A1

Abstract

The invention relates to a device for manufacturing a packaging material product made of a fibre starting material, such as a single-layer or multi-layer paper web or a corrugated board web, in particular made of recycled paper, comprising: a device for cutting to length for severing the packaging material product from a continuous length of packaging material, such as a corrugated board web or a three-dimensional continuous length of paper-cushioning formed in the device from the fibre starting material; a pair of feed wheels arranged upstream, in terms of flow, of the device for cutting to length in the conveying direction for conveying the continuous length of packaging material, and a pair of conveying wheels arranged downstream, in terms of flow, of the device for cutting to length in the conveying direction for conveying away the continuous length of packaging material, wherein a blade of the device for cutting to length is guided such that, during the cutting action, it cuts through the continuous length of packaging material in a translatory manner transversely to the conveying direction.

Description

Device with guillotine cutting device for producing a

Packaging material product from a fiber raw material and method for manufacturing a packaging material product

The invention relates to a device for producing a packaging material product from a fiber starting material, such as a single or multi-layer paper web or a corrugated cardboard web, in particular from recycled paper. The invention also relates to methods of manufacturing a packaging material product. Devices of the generic type are set up, for example, in logistics centers as a mobile unit that can be moved around, so that length-packed items are packed when an object is packed

To provide packaging material products. A packaging material strand can in particular mean a paper cushion strand which is obtained from a space-saving single or multi-layer paper web compared to the paper cushion strand, in particular from recycled paper, in the form of a material web roll or a zigzag-folded stack of packaging material, which is also referred to as a fanfold stack . To manufacture the paper cushion strand, the paper web is pulled off a roll or a stack of leporello and shaped in such a way that air pockets form, which cause damping between the object to be packaged and the outer packaging. A packaging material product can in particular be understood to mean a paper cushion product, in particular of a certain length, that has been separated from a paper cushion strand. A packaging material strand can also be understood to mean, in particular, a corrugated cardboard web. In the case of the corrugated cardboard web, the packaging material product can be a corrugated cardboard web section that has been separated from the corrugated cardboard web. Corrugated cardboard web sections are also preferably made from recycled paper for sustainability reasons.

A device for manufacturing a packaging material product is known for example from DE 697 35 564 T2. In it, a paper web is formed into a three-dimensional packaging material strand via a forming station, and a certain one is formed into the packaging material strand via a pair of deformation wheels Dimensional stability given. Then, with a scissor-cut arrangement, packaging material products are separated from the pair of deformation wheels, which are then removed from the device via a safety delivery chute. Conveyor wheels can be provided in the safety slide for the removal of the packaging material products.

A disadvantage of such devices is that the scissor-cut arrangement is, on the one hand, susceptible to wear and, on the other hand, causes the formation of cutting chips. Furthermore, it has been shown that the packaging material strand and the packaging material product can be clamped between the cooperating cutting edges of the scissor cutting arrangement and can thereby cause the device to become blocked. Another disadvantage is that the wear of the scissor-cut arrangement requires high exchange rates of the cutting edges in order to ensure a reliable separation of the packaging material.

In order to counter these problems of known devices, DE 10 2014 016 874 Ai proposes a generic device for producing one

Packaging material product. This comprises a rotary cutter and in each case a pair of feed wheel upstream and downstream of the rotary cutter. To increase the precision when cutting off the upholstery material and to reduce wear on the rotary cutter, it is proposed to match the two pairs of feed wheels in such a way that the upholstery material is under tension before the cut. This is achieved in particular by different conveying speeds of the two pairs of conveying wheels or by temporarily increasing the distance between the two pairs of conveying wheels. Furthermore, the risk of blockages occurring in the device could be reduced, in particular by a higher conveying speed of the pair of feed wheels downstream of the rotary cutter in the conveying direction and by a rotary cutter with a stripping device.

The complexity of the generic device is disadvantageous. On the one hand, the use of a rotary cutter with a stripping device entails great manufacturing and maintenance costs. On the other hand, the known concept involves an increased development effort in the development of new devices for certain paper materials and certain forms of a packaging material product. For example, the kinematics and the forces that occur between the cutting edge and the wiper during the cutting process have to be taken into account during the design phase the device are taken into account. Furthermore, the rotating parts of the scraper and rotary cutter offer dust-collecting surfaces on the one hand and are susceptible to blockages due to dust deposits on the other. The elastic scraper also threatens to become porous or lose elasticity if there is too much dust, which can have a negative impact on the risk of dust formation. A further disadvantage is that if paper jam occurs despite the proposed measures, this can only be removed by manual intervention by an operator, which on the one hand can increase the time required for removing jams and on the other hand increases the requirements for safety regulations for the device brings itself.

It is an object of the invention to overcome the disadvantages of the prior art, in particular to provide a device for producing a packaging material product from a fiber starting material and a method for producing a packaging material product, the development, production and / or maintenance expenditure for the device being reduced and the risk of dust formation and / or dust deposition in the device should not be increased, in particular reduced, and / or the dust removal should be facilitated, in particular made safer.

This object is achieved by the subject matter of the independent claims.

According to a first aspect of the present invention, the device for producing a packaging material product from a fiber starting material, such as a single or multi-layer paper web or a corrugated cardboard web, in particular from recycled paper, comprises a cutting device for separating the packaging material product from a packaging material line, such as a corrugated cardboard web or in the Device made of three-dimensional paper cushion strand formed from the fiber starting material. Furthermore, according to the invention, a feed wheel pair arranged upstream of the cutting device in the conveying direction is provided for conveying the strand of packaging material, and a pair of discharge wheels arranged downstream of the cutting device in the conveying direction for conveying the strand of packaging material. According to the first aspect of the present invention, a cutting edge of the cutting device is guided such that it cuts through the packaging material strand translationally in the cutting engagement transversely to the conveying direction. The packaging material product is made in particular from recycled paper. Recycled paper is, in particular, paper materials with a low proportion (less than 50%) of fresh fiber paper material. In particular, paper materials containing 70% to 100% waste paper are preferred. The recycled paper in the sense of this invention should be paper material which can have a tensile strength index along the machine direction of at most 90 Nm / g, preferably a tensile strength of 15 Nm / g to 60 Nm / g and a tensile strength index across the machine direction of at most 60 Nm / g can have, preferably a tensile strength of 5 Nm / g to 40 Nm / g. A standard DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used to determine the tensile strength or the tensile strength index. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called burst resistance. A material in this sense is recycled paper with a burst index of at most 3.0 kPa * m ^A 2 / g, preferably with a burst index of 0.8 kPa * m ^A 2 / g to 2.5 kPa * m ^A 2 / g. The DIN EN ISO 2758 standard is used to determine the burst index. Furthermore, the packaging material has a mass per unit area of in particular 40 g / m ^A 2 to max. 140 g / m ^A 2. The fiber starting material can in particular be a single or multi-layer paper web or a corrugated cardboard web. Furthermore, the fiber starting material can be present as a roll of material web or as a zigzag-folded stack of packaging material, which is also referred to as a leporello stack.

In particular, the device described in connection with the first and / or second aspect of the present invention relates to an upholstery material production device. Under one

Upholstery material production device is to be understood in particular as a device in which a three-dimensional upholstery strand, in particular a three-dimensional paper upholstery strand, is produced from a single or multi-layer web of starting material, in particular from a single or multi-layer paper web.

The device is preferably a device for producing a packaging material product in the form of a three-dimensional paper cushion product. A single or multi-layer paper web is preferably formed into a paper cushion strand and the paper cushion product is then separated from the paper cushion strand via the cutting device. A shaping device is preferably provided for the shaping into the paper cushion strand, which is preferably in the conveying direction upstream of the Feed wheel pair is arranged. The shaping device can, for example, be a funnel-shaped wall section of the device, which tapers in the conveying direction towards the pair of feed wheels. Alternatively or additionally, a separate shaping device, such as a shaping hopper in the conveying direction upstream of the feed wheel pair, can be attached to the device and / or to the funnel-shaped wall section of the device. Alternatively or additionally, a shaping device can be provided downstream of the cutting device in the conveying direction. Such a shaping device arranged downstream of the cutting device can be formed, for example, by a funnel-shaped wall section of the device, which tapers in the conveying direction. A shaping device arranged downstream of the cutting device is preferably arranged between the cutting device and the discharge wheel pair, in particular adjoins the discharge wheel pair in the conveying direction.

Furthermore, the cutting device preferably comprises a guide which guides the cutting edge in such a way that it translationally cuts through the material cushion strand in the cutting engagement. The cutting intervention means in particular the point in time at which the cutting edge dips into the strand of material. The cutting edge particularly preferably plunges into the material strand over its entire depth. This is to be understood in particular to mean that the cutting edge runs straight in depth, in particular the tip of the cutting edge extends in depth at a cutting direction height. By immersing the cutting edge over its entire depth in the cutting engagement, it can in particular be ensured that the packaging material strand is cut as evenly as possible, in particular at the same time, over the entire extent of the packaging material strand in the depth direction. As a result, in particular the tearing of the paper cushion strand when being cut is reduced, preferably avoided.

The depth direction is to be understood in particular as the direction which runs transversely, in particular orthogonally, to the cutting direction and to the conveying direction.

Tearing occurs in particular when a tension is applied to the strand of material before it is cut. For example, the separation can be achieved simply by applying a high voltage, due to which the strand of material is severed. However, compared to cutting with one cutting edge, there is an increased amount of dust when tearing, which should be avoided in particular for reasons of safety and maintenance. But also When cutting with one cutting edge, the packaging material strand can tear to a certain extent. For example, tearing occurs if the strand of packaging material is put under tension before being cut off and the cutting edge, such as in the case of scissors cutting, plunges into the strand of material from one side and cuts the material in the depth direction via the cutting process. From a certain progress in the severing, in particular in the depth direction, the tension in the strand of packaging material can lead to tearing of the section that has not yet been cut. Because the cutting edge plunges into the depth direction of the material strand in the depth direction of the material strand as far as possible, the formation of dust in particular can be reduced.

Due to the translational severing of the packaging material strand in the cut engagement transversely to the conveying direction, the material strand is acted upon in particular transversely to the conveying direction with a cutting force. This cutting force can preferably, particularly before the actual severing, cause the strand of packaging material to be stretched between the pairs of conveyor wheels. Particularly in the embodiment in which the cutting edge is designed and / or guided in such a way that it penetrates uniformly, in particular at the same time, over the entire depth of the paper cushioning strand, the cutting force applied to the paper cushioning strand before actually severing it, and thus in particular the tension of the Packaging material strand can be increased. Compared to rotary cutters or scissor-like cooperating cutters, a translationally guided cutting edge transversely to the conveying direction has the advantage that the force applied acts transversely to the conveying direction, preferably orthogonally to the conveying direction, on the packaging material strand and clamps it between the pairs of conveying wheels.

In a preferred embodiment, the cutting edge is guided such that it traverses the packaging material strand in a translatory manner and / or traverses transverse to the conveying direction, preferably orthogonally to the conveying direction and / or horizontally.

Alternatively or additionally, the cutting edge is guided in such a way that it translates through a conveying channel which extends at least at the conveying direction height of the cutting device in the conveying direction and is delimited in particular by a boundary wall and / or transversely to the conveying direction, preferably orthogonally to the conveying direction and / or horizontally . The conveyor channel and preferred embodiments thereof are described in detail in particular in connection with the second aspect of the present invention.

It has turned out to be particularly preferred that the cutting edge moves in a purely translatory manner when moving from a cutting start position into a cutting end position.

The cutting edge particularly preferably cuts and / or traverses the packaging material strand and / or the conveying channel transversely, preferably orthogonally, to the packaging material strand extending between the pairs of conveying wheels.

Furthermore, it has proven to be advantageous to design the cutting device free of a shear bar. As a result, in particular the development costs and the maintenance costs for the device can be reduced, since the interaction of the cutting edge and counter-cutting edge generally requires the maintenance of close tolerances. This also increases the requirements for the guidance of the cutting edge and / or the counter cutting edge to one another, so that the manufacturing and maintenance costs can be reduced again by cutting off without counter cutting. Furthermore, the wear of the cutting edges can be increased by using a counter cutting edge. In addition, the close interaction between the cutting edge and the counter cutting edge can lead to an increased occurrence of packaging material blockages. Due to the translatory cutting of the packaging material strand transversely to the conveying direction, in particular the shear bar can be compensated for by tensioning the packaging material strand. Since the tensioning of the packaging material strand in particular supports the severing, the requirements for the quality of the cutting edge decrease in particular. In particular, cheaper blades, for example of lower hardness, can be used, in particular without reducing the service life of the blade, so that the manufacturing and maintenance costs for the device are reduced.

In a preferred embodiment, the cutting edge has a plurality of, preferably between two and ten, particularly four and eight, cutting tines, the cutting tines preferably being designed as triangles tapering in the cutting direction, which preferably taper pyramid-shaped, in particular in the direction opposite to the conveying direction. Alternatively or additionally, the cutting tines close in a direction transverse to the conveying direction and the cutting direction oriented, in particular orthogonally oriented, direction, in particular in the depth direction.

With the inevitable wear of the cutting edge over time, in particular the ratio between cutting and tearing when the packaging material certificate is separated can shift towards tearing, which in particular can promote the formation of dust. An advantage of the use of cutting prongs is in particular that the shape of the prongs, which taper to a point in the cutting direction, can still ensure penetration into the packaging material strand even with a blunted cutting edge. This can in particular prevent the tension in the strand of packaging material from having to be increased excessively in order to maintain the separation, so that excessive dust formation can be avoided. On the one hand, the use of cutting tines enables immersion in the packaging material strand to be realized over the entire depth in the cutting operation, and thus, in particular with new, sharp cutting edges, the most dust-free possible separation. On the other hand, compared to a smooth cutting edge, the cutting prongs enable penetration into the paper cushion strand even with graded cutting edges and thereby cutting as dust-free as possible.

In a preferred embodiment, the cutting edge is driven via a rotary drive, in particular via a rotary electric motor, the rotary movement of the electric motor being converted into a translational movement via a conversion gear, such as a toggle lever.

According to a second aspect of the present invention, an apparatus for producing a packaging material product from a fiber starting material, such as a single or multilayer paper web or a corrugated cardboard web, in particular from recycled paper, comprises a cutting device for separating the packaging material product from one

Strand of packaging material, such as a corrugated cardboard web or a three-dimensional paper cushion strand formed in the device from the fiber starting material. Furthermore, the device comprises a pair of feed wheels arranged upstream of the cutting device in the conveying direction for conveying the packaging material strand and a pair of discharge wheels arranged downstream of the cutting device in the conveying direction for conveying off the packaging material strand. According to the second aspect of the present invention the device comprises a conveying channel which extends at least at the conveying direction height of the cutting device in the conveying direction and is delimited by a boundary wall. In addition, the device according to the second aspect of the present invention comprises a gap formed in the boundary wall, which is designed such that a cutting edge of the cutting device can move into and out of the gap without contact. A contact-free entry and exit into the gap is to be understood in particular to mean that the cutting edge remains contact-free with respect to the counter edges delimiting the gap in the conveying direction.

It should be understood that all of the configurations mentioned in connection with the first aspect of the present invention can be combined with the second aspect of the present invention and all of the embodiments mentioned above and below in connection with the second aspect of the present invention can be combined with the first aspect of the present invention Invention can be combined.

The gap is preferably formed at the conveying direction level of the cutting device. The gap is particularly preferably designed such that the cutting edge can translationally cut the packaging material strand in the cutting engagement, in particular purely translationally from a cutting start position into a cutting end position method, and can move into and out of the gap contactlessly, in particular the cutting tip of the cutting edge can leave the conveying channel without contact can.

The gap is in particular an elongated opening. This is to be understood in particular to mean that the extent of the gap in one longitudinal direction of the gap is significantly greater than in the other directions. The longitudinal direction of the gap corresponds in particular to the depth direction. In particular, the gap extends in the depth direction by at least 200%, 300%, 400% or 500% of the gap extension in the cutting direction and in the conveying direction. In particular, the gap extends in the depth direction over at least 60%, 80%, 90% or 95%, in particular at least 100%, of the extent of the conveying channel, of the cutting edge, of the upstream wall section and / or of the downstream wall section in the depth direction. In the conveying direction, the gap extends in particular between the upstream and the downstream counter edge. In the cutting direction, the gap extends in particular between the boundary surface of the conveyor channel facing Boundary wall, in particular the boundary surface of the upstream wall section, which delimits the conveying channel in the cutting direction, and the surface facing away from the conveying channel, in particular the outer surface, of the boundary wall, in particular the surface of the downstream wall section facing away from the conveying channel, which delimits the conveying channel in the cutting direction. In particular, the gap extends in the cutting direction and / or in the conveying direction by at most 50%, 30%, 20% or 10% of the extent of the gap in the depth direction. Moving the cutting edge into the gap means in particular a movement of the cutting edge in the cutting direction beyond the boundary surface of the boundary wall facing the conveying channel, in particular the upstream wall section delimiting the conveying channel in the cutting direction. Extending the cutting edge from the gap is to be understood in particular to mean moving the cutting edge in the cutting direction beyond the outer surface of the boundary wall facing away from the conveying channel, in particular the downstream wall section delimiting the conveying channel in the cutting direction. In particular, by the offset of the downstream counter edge to the upstream counter edge in the cutting direction, the splitter extension in the cutting direction can be increased. A movement of the cutting edge out of the conveying channel is achieved in particular when the cutting edge, in particular the cutting tip, travels beyond the boundary wall delimiting the conveying channel in the cutting direction, in particular the boundary surface of the upstream and / or downstream boundary wall facing the conveying channel in the cutting direction.

The conveying direction height of the cutting device means in particular the height in the conveying direction at which the cutting edge, in particular the cutting tip, of the cutting device is in cutting engagement with the strand of packaging material. The cutting edge preferably moves purely translationally in the cutting direction at the conveying direction height of the cutting device, the cutting direction preferably running transversely, in particular orthogonally, to the conveying direction. The conveying channel at the conveying direction level of the cutting device extends in the conveying direction, in particular downstream and upstream of the cutting edge, particularly preferably at least up to the pairs of conveying wheels. The feed channel is delimited in particular by the boundary wall. The boundary wall preferably surrounds the conveying channel upstream and / or downstream of the cutting device. This means in particular that the conveying channel is open in the conveying direction and in the cutting direction as well limited in the depth of the device by the boundary wall, in particular is enclosed. For example, the boundary wall can have opposite wall sections in the cutting direction and / or in the depth direction, which delimit the conveying channel. However, the delivery channel does not necessarily have to be enclosed by the boundary wall. For example, it can also be formed by two mutually opposite, in particular parallel, walls in the cutting direction or in the depth direction, while the conveying channel is open in the other direction. The conveying duct is particularly preferably delimited by opposing, preferably parallel, upper and lower wall sections which delimit the conveying duct in the depth direction. Particularly preferably, the upper and lower wall sections extend in the conveying direction between the pairs of feed wheels, in particular at least from the pair of feed wheels to the pair of discharge wheels. The cutting edge is preferably guided over the upper and lower wall sections, in particular at the level of the cutting device in the conveying direction, in particular when moving from a cutting start position to a cutting end position.

In particular, the boundary wall comprises an upstream wall section. In particular, the conveying channel is delimited in the conveying direction upstream of the gap by the upstream wall section which has an upstream counter edge delimiting the gap in the conveying direction upstream. In particular, the upstream wall section delimits the conveyor channel in the cutting direction. In particular, the upstream wall section extends from the gap in the direction opposite to the conveying direction and in the depth direction. In particular, the upstream wall section extends from the gap in the direction opposite to the conveying direction by at least 40%, 60%, 80% or 100% of the distance between the gap and one, in particular both, axis of rotation of the pair of feed wheels in the conveying direction. In particular, the upstream wall section extends in the depth direction by at least 100%, 120%, 140%, 160% 180% or 200% of the extent of the feed wheel pair in the depth direction. In particular, the upstream wall section extends in the depth direction by at least 60%, 80%, 100%, 120% or 140% of the extent of the packaging material strand in the depth direction. In particular, the upstream wall section extends in the depth direction and in the direction opposite to the conveying direction in such a way that the packaging material strand is prevented from escaping in the cutting direction from the conveying channel between the gap and the pair of feed wheels. Limited in particular the upstream wall section the conveying channel in the cutting direction in such a way that the packaging material strand is prevented from catching on the axes of rotation of the pair of feed wheels. In particular, the axes of rotation of the feed wheel pair are arranged outside the feed channel. In particular, the upstream wall section, which delimits the conveying channel in the cutting direction, extends over the entire surface in the depth direction and in the direction opposite to the cutting direction. For example, the upstream wall section can be in the form of a continuous wall over at least 40%, 60%, 80% or 100% of the width of the conveying channel in the depth direction and starting from the gap in the direction opposite to the conveying direction over at least 40%, 60%, 80% or Extend 100% of the distance between the gap and the axes of rotation of the feed wheel pair.

In particular, the boundary wall comprises two upstream wall sections opposite one another in the cutting direction. In particular, a first of the two upstream wall sections is designed according to one or more of the features described above. In particular, the second of the two upstream wall sections delimits the conveying channel in the direction opposite to the cutting direction. In particular, the second upstream wall section is designed according to one or more of the features of the upstream wall section described above. In particular, the two upstream wall sections are spaced apart from one another by at least 100%, 120% or 150% and / or by at most 400%, 300%, 250% or 200% of the extent of the packaging material strand in the cutting direction. In particular, the two upstream wall sections extend in the cutting direction between the axes of rotation of the feed wheel pair.

In particular, the conveying channel is delimited in the conveying direction between the axes of rotation of the pair of feed wheels and the gap by the two upstream wall sections. In particular, two upstream wall sections extend in the conveying direction and in the depth direction so flat that they prevent the packaging material strand from escaping from the conveying channel. The conveying channel is formed in particular by the space which the strand of packaging material travels between the pair of feed wheels and the pair of discharge wheels during the manufacture of the packaging material product. The conveying channel extends in the cutting direction and in the depth direction in particular over at least 100%, 120%, 140% or 160% of the extent of the packaging material strand in the cutting direction and in the depth direction. In particular, the delivery channel extends in Cutting direction at most over the extension of the feed wheel pairs, preferably over less than 100%, 90% or 80% of the extension of both feed wheels of the feed wheel pair in the cutting direction.

In a preferred embodiment, the conveying channel is additionally delimited by two upstream and lower wall sections located opposite one another in the depth direction. The upper and lower wall sections can in particular provide guide surfaces for the cutting edge. Furthermore, the upper and lower wall sections can be used as mounting walls for fastening the feed wheel pair. In particular, the upper and lower upstream wall sections limit the conveying channel in the depth direction. The upstream upper and lower wall sections can connect, in particular in the depth direction, to the upstream wall section, in particular to both upstream wall sections, which delimit the conveying channel in the cutting direction. In particular, the feed channel can be delimited by three upstream wall sections which form a U-shaped boundary wall upstream of the gap, in particular by a wall section delimiting the feed channel in the cutting direction and two wall sections delimiting the feed channel in the depth direction. The delivery channel is particularly preferably delimited by four upstream wall sections which form an essentially closed profile cross section upstream of the gap. In particular, the four upstream wall sections form upstream of the gap an angular, in particular rectangular, upstream boundary wall which essentially surrounds the conveying channel upstream of the gap in the cutting direction and in the depth direction. In this context, essentially means in particular that the boundary wall encloses at least 70%, 80%, 90% or 95% of the conveying channel between the pair of feed wheels and the gap in the depth direction and in the cutting direction. The feed channel between the feed wheel pair and the gap in the depth direction and in the cutting direction is particularly preferably 100% enclosed by the upstream boundary wall. The gap, in particular in the directions orthogonal to the cutting direction, is preferably designed such that the packaging material strand and / or the packaging material product do not jam in the gap. To prevent this, the configurations of the gap described below have proven to be advantageous. According to an advantageous embodiment of the present invention, the conveying channel is delimited in the conveying direction upstream of the gap by an upstream wall section which has an upstream counter edge delimiting the gap in the conveying direction upstream.

The upstream counter edge differs in particular from a shear bar in that it has a minimum distance of at least 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 1.0 when the knife is moved into and out of the gap mm, 2 mm, 3 mm or 5 mm. Depending on the tension under which the packaging material strand stands during cutting and / or the sharpness of the cutting edge and / or the configuration of the conveying channel, the counter edge preferably differs from a counter cutting edge in that the packaging material strand is contact-free with respect to the upstream counter edge when the packaging material product is separated. In the case of blunt cutting edges in particular, however, the upstream counter edge can preferably also form an abutting edge which supports the severing. As an alternative or in addition, the distance in the conveying direction and in the direction opposite to the conveying direction between the cutting edge and the upstream and / or the downstream counter edge is selected such that cutting residues adhering to the cutting edge when the cutting edge is retracted into the gap, in particular into the conveying channel, at the be stripped upstream and / or the downstream counter edge. In particular, the accumulation of cutting residues in the conveying channel can be further reduced thereby.

An edge is to be understood in particular as a line which is formed by two abutting planes. In particular, an edge extends essentially in an edge direction, namely in the direction of the theoretical two-dimensional line which is formed by the two adjoining planes. In particular, an edge can be a rounded transition surface between the two abutting planes. A counter edge is to be understood in particular as an edge or a section of an edge which remains in contact-free manner with respect to the cutting edge when the cutting edge is moved in and out of the gap. The direction (edge direction) in which the upstream counter edge extends is in particular the depth direction. In particular, the upstream counter edge extends in the depth direction by at least 40%, 60%, 80%, 90% or 95%, in particular by at least 100%, of the delivery channel. In particular, the upstream counter edge extends over the entire extent of the upstream wall section in the depth direction, which delimits the conveying channel in the cutting direction. In particular the upstream counter edge is formed by a boundary surface of the upstream wall section facing the delivery channel, which delimits the delivery channel in the cutting direction, and by the end face of the upstream wall section, which borders the delivery channel in the cutting direction, facing the gap. In particular, the end face of the upstream wall section facing the gap and the boundary surface of the upstream wall section facing the delivery channel extend in the depth direction by at least 40%, 60%, 80%, 90% or 95%, in particular by at least 100%, of the delivery channel and / or by at least 40%, 60%, 80%, 90% or 95%, in particular by at least 100%, of the extent of the cutting edge in the depth direction.

According to an advantageous embodiment of the present invention, the cutting edge is spaced from the upstream counter edge in the conveying direction when entering and leaving the gap. The distance is preferably 0.1 mm to 50 mm, 0.5 mm to 30 mm or 1.0 mm to 15 mm. The distance between the cutting edge and the upstream counter edge in the conveying direction when entering and exiting the gap is particularly preferably constant, in particular over the entire travel path from a cutting start position to a cutting end position.

It is further preferred that the cutting edge extends beyond the upstream counter edge when entering and leaving the gap, in particular in the cutting direction. The cutting edge preferably extends 0.1 to 200 mm, 0.5 to 100 mm or 5.0 to 50 mm beyond the upstream counter edge.

In a further advantageous embodiment of the present invention, the conveying channel is delimited in the conveying direction downstream of the gap by a downstream wall section. The downstream wall section preferably has a downstream counter edge delimiting the gap downstream in the conveying direction.

In particular, the boundary wall comprises a downstream wall section. In particular, the conveying channel in the conveying direction downstream of the gap is delimited by the downstream wall section which has a downstream counter edge delimiting the gap in the conveying direction downstream. In particular, the downstream wall section delimits the conveying channel in the cutting direction. In particular, the downstream wall section extends from the gap in the conveying direction and in the depth direction. In particular stretches the downstream wall section starts from the gap in the conveying direction by at least 40%, 60%, 80% or 100% of the distance between the gap and one, in particular both, axis of rotation of the pair of discharge wheels in the conveying direction. In particular, the downstream wall section extends in the depth direction by at least 100%, 120%, 140%, 160% 180% or 200% of the extent of the discharge wheel pair. In particular, the downstream wall section extends in the depth direction by at least 60%, 80%, 100%, 120% or 140% of the extent of the packaging material strand in the depth direction. In particular, the downstream wall section extends in the depth direction and in the conveying direction in such a way that an escape of the packaging material strand in the cutting direction out of the conveying channel between the gap and the pair of discharge wheels is prevented. In particular, the downstream wall section delimits the conveying channel in the cutting direction in such a way that the packaging material strand is prevented from catching on the axes of rotation of the pair of conveying wheels. In particular, the axes of rotation of the pair of discharge wheels are arranged outside the conveyor channel. In particular, the downstream wall section, which delimits the conveying channel in the cutting direction, extends over the entire surface in the depth direction and in the direction opposite to the cutting direction. For example, the downstream wall section can be in the form of a continuous wall over at least 40%, 60%, 80% or 100% of the width of the conveying channel in the depth direction and, starting from the gap in the conveying direction, over at least 40%, 60%, 80% or 100% of the distance extend between the gap and the axes of rotation of the feed wheel pair.

In particular, the boundary wall comprises two downstream wall sections opposite one another in the cutting direction. In particular, a first of the two downstream wall sections is designed according to one or more of the features described above. In particular, the second of the two downstream wall sections delimits the conveying channel in the direction opposite to the cutting direction. In particular, the second downstream wall section is designed in accordance with one or more of the features of the downstream wall section described above. In particular, the two downstream wall sections are spaced apart from one another by at least 100%, 120% or 150% and / or by at most 400%, 300%, 250% or 200% of the extent of the packaging material strand in the cutting direction. In particular, the two downstream wall sections extend in the cutting direction between the axes of rotation of the pair of discharge wheels. In particular, the conveying channel is delimited in the conveying direction between the axes of rotation of the pair of discharge wheels and the gap by the two downstream wall sections. In particular, two downstream wall sections extend in the conveying direction and in the depth direction so that they prevent the packaging material strand from escaping from the conveying channel. In particular, the conveying channel extends in the cutting direction at most over the extent of the pair of conveying wheels, preferably over less than 100%, 90% or 80% of the extent of both conveying wheels of the pair of conveying wheels in the cutting direction.

In a preferred embodiment, the conveying channel is additionally delimited by two upper and lower wall sections located opposite one another in the depth direction. The upper and lower wall sections can in particular provide guide surfaces for the cutting edge. Furthermore, the upper and lower wall sections can be used as mounting walls for fastening the pair of discharge wheels. In particular, the upper and the lower downstream wall section delimit the conveying channel in the depth direction. The downstream upper and lower wall sections can connect, in particular in the depth direction, to the downstream wall section, in particular to both downstream wall sections, which delimit the conveying channel in the cutting direction.

In particular, the downstream upper and lower wall sections can merge. In particular, the downstream upper and lower wall sections can merge into the upstream upper and lower wall sections at the conveying direction level of the cutting device without gaps. In particular, each of the upper and lower wall sections can extend as a continuous wall from the pairs of feed wheels to the pair of discharge wheels, thereby forming the upstream and downstream upper and lower wall sections. In particular, the upstream and downstream wall sections can merge into one another in the depth direction without displacement. In particular, the upstream and downstream upper and / or lower wall sections can each be formed in one piece.

In particular, the conveyor channel can be delimited by three downstream wall sections which form a U-shaped boundary wall downstream of the gap, in particular by a wall section delimiting the conveyor channel in the cutting direction and two delimiting the conveyor channel in the depth direction Wall sections. The conveying channel is particularly preferably delimited by four downstream wall sections, which form an essentially closed profile cross section downstream of the gap. In particular, the four downstream wall sections form a square, in particular rectangular, downstream boundary wall downstream of the gap, which essentially enclose the conveying channel downstream of the gap in the cutting direction and in the depth direction. In this context, essentially means that the boundary wall encloses the conveying channel between the pair of discharge wheels and the gap in the depth direction and in the cutting direction to at least 70%, 80%, 90% or 95%. The conveying channel between the pair of discharge wheels and the gap in the depth direction and in the cutting direction is particularly preferably 100% enclosed by the downstream boundary wall.

It is also advantageous that the cutting edge is spaced apart from the downstream counter edge in the conveying direction when entering and leaving the gap. The distance is particularly preferably 0.1 mm to 200 mm, 0.5 mm to 100 mm or 5.0 mm to 50 mm. The distance between the cutting edge and the upstream counter edge in the conveying direction when entering and exiting the gap is particularly preferably constant, in particular over the entire travel path from a cutting start position to a cutting end position.

In an advantageous embodiment, the cutting edge travels in the cutting direction beyond the downstream counter edge when entering and exiting the gap. The cutting edge preferably extends 0.1 to 150 mm, 0.5 to 70 mm or 5.0 to 30 mm beyond the downstream counter edge.

The direction (edge direction) in which the downstream counter edge extends is in particular the depth direction. In particular, the downstream counter edge extends in the depth direction by at least 40%, 60%, 80%, 90% or 95%, in particular by at least 100%, of the delivery channel. In particular, the downstream counter edge extends over the entire extent of the downstream wall section in the depth direction, which delimits the conveying channel in the cutting direction. In particular, the downstream counter edge is formed by a boundary surface of the downstream wall section facing the delivery channel and by the end face of the downstream wall section facing the gap. In particular, the end face of the downstream wall section facing the gap and that of the delivery channel extends facing boundary surface of the downstream wall section in the depth direction by at least 40%, 60%, 80%, 90% or 95%, in particular by at least 100%, of the delivery channel and / or by at least 40%, 60%, 80%, 90% or 95 %, in particular by at least 100%, of the extent of the cutting edge in the depth direction.

It has proven to be advantageous that the downstream counter edge is offset in the cutting direction with respect to the upstream counter edge. The offset is preferably 0.1 mm to 200 mm, 0.1 mm to 100 mm, 0.1 mm to 50 mm, 0.5 mm to 30 mm or 5 mm to 10 mm. Alternatively or additionally, the downstream counter edge and the upstream counter edge are offset from one another in such a way that the packaging material strand and / or the packaging material product remain contact-free with respect to the downstream wall section, in particular the downstream counter edge, when the packaging material product is separated.

It has turned out to be particularly preferred if the cutting edge moves out of the conveying channel when entering and exiting the gap. In this case, the cutting edge preferably moves out of the conveying channel in such a way that dust and / or snippets which arise when being cut off are thrown out of the conveying channel. Alternatively or additionally, the cutting edge can protrude from the conveying channel into a cutting end position by 0.1 to 150 mm, 0.5 to 70 mm or 5.0 to 30 mm. This is to be understood in particular to mean that the end of the cutting edge protrudes from the conveying channel in the cutting direction, in particular the cutting tip by 0.1 to 150 mm, 0.5 to 70 mm or 5.0 to 30 mm. This distance is measured in particular between the end of the cutting edge in the cutting direction, in particular the cutting tip, and the boundary surface of the downstream boundary wall, in particular the downstream counter edge, facing the conveying channel. Alternatively or additionally, the cutting edge can protrude in the cutting direction in the cutting direction by 0.1 mm to 200 mm, 0.5 mm to 100 mm or 5.0 mm to 50 mm beyond the upstream counter edge.

With the design of the gap described above, it can in particular be brought about that dust and snippets which arise when severing are largely conveyed out of the conveying channel and, at the same time, cutting residues and snippets adhering to the cutting edge when re-entering the gap, in particular in the Conveying channel, on the boundary wall, in particular on at least one counter edge, are stripped.

In a preferred embodiment, the gap is introduced in the boundary wall in this way, the boundary wall is in particular designed in such a way that the cutting edge comes into cut engagement with the strand of packaging material before it enters the gap. The packaging material product is particularly preferably separated from the packaging material strand before the cutting edge is inserted into the gap. In particular, this can reduce the risk that the packaging material product or the packaging material strand is pinched in the gap. This can be realized in particular in that the conveying channel is designed in the cutting direction in such a way that the packaging material strand between the pairs of conveying wheels is kept at a distance from the boundary wall, in particular from the gap. As an alternative or in addition, the packaging material strand can be tensioned before the separation, so that the packaging material strand is pressed in the cutting direction at most until just before the gap under the influence of the force exerted by the cutting edge on the packaging material strand.

In a preferred embodiment of the present invention, the device comprises a retraction gap formed in the boundary wall, which is designed in such a way that the cutting edge can move into and out of the conveying channel, in particular without contact. The withdrawal gap is preferably formed on a section of the boundary wall opposite the gap in the cutting direction. The withdrawal gap and / or the opposite section of the boundary wall, such as the gap and / or the wall sections surrounding the gap, is particularly preferably formed. The cutting edge is preferably guided in such a way that the cutting edge, in particular the cutting tip, is arranged outside the conveying channel in a cutting start position, which the cutting edge assumes in particular before the paper cushion product is separated.

In this case, the cutting tip preferably extends in the direction opposite to the cutting direction above a counter edge of the upstream section of the boundary wall which delimits the retraction gap upstream. This can in particular ensure that the paper cushion strand does not get caught on the cutting edge during conveying and conveying away. With the formation of the retreat gap and the one that limits the retreat gap Sections of the boundary wall, as in the case of the gap, are to be understood in particular that the above-described distances of the cutting edge to the upstream and downstream counter edge of the gap when entering and exiting the gap and / or into the conveying channel are preferably also observed with regard to the withdrawal gap .

The withdrawal gap and the gap are particularly preferably formed in the boundary wall in such a way that the cutting edge moves from a cutting start position into a cutting end position via the withdrawal gap into the conveying channel and in particular on an opposite side of the conveying channel in the cutting direction, via the gap from the conveying channel can. As an alternative or in addition, the retraction gap and the gap are formed in the boundary wall such that when moving from a cutting start position into a cutting end position, the cutting edge first enters the conveying channel via the retracting gap, comes into cutting engagement with the strand of packaging material in the conveying channel and out of the gap through the gap Delivery channel extends. Furthermore, the retraction gap and the gap are alternatively or additionally formed in the boundary wall such that the cutting edge can move out of a cutting end position into a cutting start position via the retraction gap from the conveying channel during the movement.

For this purpose, the withdrawal gap and the gap are preferably formed opposite one another, in particular in alignment with one another in the cutting direction. The gap and the retraction gap particularly preferably extend parallel to one another and / or form a passage gap which extends transversely to the conveying direction, in particular orthogonally to the conveying direction, and in particular cuts in the cutting direction and in the direction opposite to the cutting direction. During the movement, the cutting edge preferably moves from a cutting start position into a cutting end position without contact into and out of the passage gap.

When forming the gap and / or the retraction gap, it is particularly advantageous if this is delimited by a counter edge both upstream and downstream of the cutting edge. An advantage of the counter edges formed on both sides of the gap and / or the retraction gap is, in particular, the cutting residues and / or cutting snippets adhering to the cutting edge can be stripped off when retracting into the gap and / or into the retraction gap. The cutting edge can preferably be completely moved out of the conveying channel section adjoining the cutting edge in the conveying direction via the retraction gap.

In a preferred embodiment, the withdrawal gap extends transversely, preferably orthogonally, to the conveying direction and / or to the cutting direction.

In a preferred embodiment, the gap extends transversely, preferably orthogonally, to the conveying direction and / or to the cutting direction.

In an advantageous embodiment of the present invention, the feed wheel pair, the discharge wheel pair and the cutting device are matched to one another such that the packaging material strand is under tension, in particular when the packaging material product is separated. This can be achieved, for example, in that the packaging material strand is continuously under tension when conveying between the pairs of conveyor wheels. For example, this can be realized in that the pair of discharge wheels notifies the paper cushion strand of a higher conveying speed than the pair of feed wheels. However, this embodiment can, in particular, lead to increased slippage and thus increased dust formation, which is why it is not preferred.

On the other hand, it is preferred to assign each of the feed wheel pair and the discharge wheel pair a separate drive for independently driving and / or braking at least one feed wheel of the respective feed wheel pair. The drives are preferably driven and / or braked independently of one another, in particular via a higher-level control unit, in such a way that the pair of feed wheels and the pair of discharge wheels tension the packaging material strand before the packaging material product is separated. This can be achieved, for example, in that the pair of discharge wheels drives the packaging material strand more strongly than the pair of feed wheels before it is separated. For example, the greater drive can be due to a higher conveying speed, which the conveying wheel pair communicates to the strand of packaging material. As an alternative or in addition, the stronger drive can be due to a greater conveying force which is communicated to the packaging material strand and / or a greater rotational movement of at least one driven feed wheel of the feed wheel pair compared to the rotational movement of at least one driven feed wheel of the feed wheel pair. The pairs of conveyor wheels are particularly preferably braked, in particular stopped, before the packaging material strand is tensioned. This can in particular excessive slippage and the associated dust formation can be avoided.

The use of conveyor wheel pairs is particularly advantageous for the present invention because it can reduce the friction between the packaging material strand and the conveyor, in particular slippage, and in particular can reduce the dust formation when manufacturing packaging material products.

In an advantageous embodiment of the present invention, the pair of feed wheels and / or the pair of discharge wheels detects the strand of packaging material between two conveyor wheels and conveys the strand of packaging material along or against the conveying direction. As an alternative or in addition, the pair of feed wheels and / or the pair of discharge wheels conveys the strand of packaging material along or counter to a passage direction defined by a common tangent to a respective outer circumference of the conveyor wheels.

In a further advantageous embodiment of the present invention, the feed wheels of the feed wheel pair and / or the discharge wheel pair are braced against one another. The feed wheels of the feed wheel pair and / or the feed wheel pair are preferably opposed to one another with a force of at least 1 Newton, 50 Newton, 100 Newton or 150 Newton, of at least 250 Newton, 350 Newton or 450 Newton or of at least 550 Newton, 700 Newton or 900 Newton tense. As an alternative or in addition, the distance between the wheel axles of the feed wheels of one pair of wheels is undersized such that the wheels are elastically preloaded against one another.

In a preferred embodiment, the wheel axes of at least one, preferably both pairs of feed wheels each run parallel to one another. Alternatively or additionally, the wheel axles run at least one, preferably both pairs of conveyor wheels, each transversely, preferably orthogonally, to the direction of conveyance or a direction of passage defined by a common tangent to a respective outer circumference of the conveyor wheels and / or along a plane which is transversely, preferably orthogonally, to Direction of conveyance or a through direction defined by a common tangent in a respective outer circumference of the conveying wheels. In a preferred embodiment, the feed wheel pairs are in particular aligned with one another along a plane which has a wheel axis of a feed wheel pair, preferably both wheel axles of both feed wheel pairs, as a normal vector.

In a particularly preferred embodiment of the present invention, at least one wheel of at least one pair of front wheels comprises an elastically deformable pick-up area, the wheel preferably being formed by an elastomer body, such as a PU foam body, or having a corresponding outer coating.

The present invention further relates to a method for producing a packaging material product from a fiber starting material, such as a single or multi-layer paper web or a corrugated cardboard web, in particular from recycled paper, the method being carried out with a device according to at least one of the embodiments described above or below.

A third aspect of the present invention relates to a packaging material, such as a paper cushion material strand or a corrugated cardboard web section, which is produced by, in particular by means of, a device according to the first and / or second aspect of the present invention. Alternatively or additionally, the third aspect of the present invention relates to a packaging material that is produced according to the previously described method.

When fiber starting material is referred to in the context of the present invention, it is in particular a preferred embodiment or a preferred field of application of the present invention. Preferably, both a device according to the first and / or second aspect of the present invention and the method described above for producing a packaging material product from starting material in general, that is to say from fiber starting material, from fiber-free starting material, such as plastic, and / or from composite material, such as combinations made of fiber starting material and fiber-free starting material.

The method described above can in particular be designed such that it can be carried out with the device according to the invention in accordance with the first and / or second aspect of the present invention. The device according to the invention according to the first and / or second aspect of the present invention can in particular be structured such that the method described above can be carried out.

Further advantages, effects and embodiments of the present invention are evident from the figures shown below. It shows:

FIG. 1 shows a view from below into a device according to the invention, the lower and upper boundary wall for illustrating the individual components being removed and the cutting edge being in a cutting start position;

Fig. 2 shows the device of Fig. 1, the cutting edge in one

Cutting medium position;

FIG. 3A shows the device from FIG. 1, with the cutting edge in one

Cutting end position;

3B shows an enlarged section of area A from FIG. 3A; and

FIG. 4 shows a perspective view of the device from FIG. 1.

Fig. 5 is a schematic representation of an apparatus for manufacturing

Packing material;

Fig. 6 is a schematic representation of the promotion of a

Strands of packaging material between two pairs of conveyor wheels;

Fig. 7 is a schematic representation of the tensioning of a

Strands of packaging material between two pairs of conveyor wheels;

Fig. 8 is a schematic representation of the separation of a

Packaging material product from one

Package of packaging material by moving a cutting edge between two pairs of conveyor wheels;

9 shows a schematic illustration of the packaging material product and the packaging material strand immediately after the packaging material product has been separated; 1 shows a view from below of a preferred embodiment of a device 6oi for manufacturing packaging material products, in which a lower and upper boundary wall, in particular of the conveying channel 619, is hidden in order to show the individual components of the device 601. 1 shows the device 601 with the cutting edge 605 of a cutting device 603 in a preferred cutting start position. FIG. 2 shows the device from FIG. 1 with the cutting edge 605 in a middle position between a preferred cutting start position and a preferred cutting end position. FIG. 3A shows the device 601 from FIG. 1 with the cutting edge 605 in a preferred cutting end position. FIG. 3B shows an enlarged view of area A from FIG. 3A. Fig. 4 shows a perspective view of Fig. 3A

The device 601 comprises a cutting device 603 for separating the packaging material product (not shown in FIGS. 1 to 4) from a three-dimensional packaging material strand 611, such as a paper cushioning strand formed in the device 601 from a single or multi-layer paper web. A pair of feed wheels 613 for conveying the strand of packaging material (not shown in FIGS. 1 to 4) is arranged in the conveying direction upstream of the cutting device 603. In the conveying direction F downstream of the cutting device 603, a pair of discharge wheels 615 is arranged for conveying the strand of packaging material away. The feed wheel pair 613 is driven by a drive 635, in particular in the form of an electric motor. The output of the drive 635 of the feed wheel pair 613 is coupled via a gear 637, in particular a worm gear, to the feed wheel pair 613, in particular to a drive shaft 639 of a feed wheel, in particular the driven feed wheel 641.

The conveying direction F preferably means the direction in which the packaging material strand 611 is conveyed from the feed wheel pair 613 to the discharge wheel pair 615. In the preferred embodiment shown here, the strand of packaging material 611 is conveyed directly, ie without deflecting the same, from the feed wheel pair 613 to the discharge wheel pair 615. However, it should be clear that in a less preferred embodiment the packaging material strand 611 can also be deflected between the conveyor wheel pairs 613, 615. In the broader sense, conveying direction F is therefore to be understood as the direction in which the packaging material strand 611 is conveyed upstream and downstream of the conveying device, in particular the cutting edge 605. For example, in the case of a plurality of deflection devices between the conveyor wheel pairs 613, 615, the conveying direction F would be is defined by the direction in which the packaging material strand 611 is conveyed by the deflection device close to the cutting edge 605 and the deflection device close to the cutting edge 605 downstream. In the previous and the following information regarding the arrangement in the conveying direction F upstream and downstream of the cutting device or the cutting edge 605, the state of the cutting should preferably always be taken into account in which the cutting edge 605 comes into cutting engagement with the packaging material strand 611. In the preferred embodiment, in which the cutting edge 605 moves translationally, a straight line extending along the cutting direction S can thus be regarded as a reference for the upstream and downstream arrangement of components. In embodiments in which the cutting edge moves translationally only in the cutting engagement or also moves purely rotationally contrary to the first aspect of the present invention, for the assessment of the upstream and downstream positioning of components relative to the cutting edge 605, a line extending in the cutting direction S at the time of the cutting engagement is required to consider. The cutting direction S is the direction in which the cutting edge 605 penetrates the packaging material strand 611 in the cutting engagement thereof. In the case of a cutting edge 605 which is guided purely by rotation, contrary to the first aspect of the present invention, the tangent in the cutting engagement would therefore have to be taken into account as the cutting direction S.

The discharge wheel pair is driven by its own drive 643, in particular an electric motor. The output of the drive 643 is coupled via a gear 645 to the pair of driven wheels 615, in particular to a drive shaft 647 of a driven discharge wheel 649.

The cutting device 603 is driven by a drive 651, in particular in the form of an electric motor. In FIGS. 1 to 3, the electric motor 651 of the cutting device 603 extends into the plane of the drawing and in the cutting direction S. The output of the drive 651 of the cutting device 603 is coupled to the cutting device 603 via a gear 653, in particular a gear that is cut to the cutting device. In the embodiment shown here, the gear 653 of the cutting device 603 comprises a transmission gear 655 for translating or reducing the output movement of the drive 651. Furthermore, the gear 653, which is provided with the cutting device, comprises a conversion gear 657 for converting a rotary movement into a translational movement, in particular in the cutting direction S. The cutting edge 605 preferably has a plurality of cutting prongs 663. The cutting edge 605 preferably has seven cutting prongs 663. The cutting tines adjoin one another in particular in a direction transverse to the conveying direction F, in particular orthogonally thereto, and in a direction transverse to the cutting direction S, in particular orthogonal to it. The teeth can extend over the entire depth T of the cutting edge 605. The depth T of the paper cushion making machine is the direction out of the drawing plane in the drawings. The depth T preferably runs transversely, in particular orthogonally, to the cutting direction S and to the conveying direction F.

The tines 663 particularly preferably extend essentially over the entire depth T of the conveying channel 619. The entire depth T is not to be understood as meaning that the cutting edge 605 grinds along the upper and lower boundary walls, not shown. Rather, a corresponding gap is preferably provided in the transition area between the upper and lower boundary wall and the cutting edge, so that the cutting edge 605 moves without contact with the upper and lower boundary wall. Cutting tines 663 are preferably formed as triangles tapering in the cutting direction S, which preferably taper pyramid-shaped in the conveying direction F over the thickness of the cutting edge. The cutting teeth adjoining the upper and lower boundary walls in depth T merge in the opposite direction to the cutting direction S, in particular in alignment, into an assembly section 665 of the cutting edge 605. The cutting edge 605 is connected, in particular screwed, in particular via the mounting section 665 to a slide 667 of the cutting device 603. For the attachment of the cutting edge 605 to the slide 667, bores 669 are preferably provided in the mounting section 665 of the cutting edge 605. The cutting edge is connected to the slide 667 of the cutting edge via the bores 669, preferably with screws or rivets. The carriage moves in particular in the cutting direction S.

The conversion gear 657 of the cutting device 603 preferably comprises two articulated sections 671, 673 which are connected to one another so as to be rotatable, in particular around an axis of rotation Di extending in the conveying direction F. The articulated sections 671, 673 are each preferably connected to one another via one end. A joint section 673 faces the carriage 667 in the conveying direction. The other drive 651 faces in particular the transmission gear 655 of the drive 651. The articulated section 673 facing the carriage 667 is articulated to the carriage 667 at its end facing away from the axis of rotation Di via an axis of rotation D2, which extends in particular in the conveying direction F. The drive 651, in particular the articulated section 671 facing the transmission gear 655 is articulated to the transmission gear 655 via an axis of rotation D3 which extends in particular in the conveying direction F. Furthermore, the cutting device 603 preferably has a guide 675 in the cutting direction S. The guide preferably comprises a cylinder 677, which extends in particular in the cutting direction S, and a sled shoe 679 which can be moved along the cylinder 677 in the cutting direction S. The sled shoe 679 is preferably fixedly connected to the slide 667. The cutting edge 605 is particularly preferably arranged downstream of the cutting edge 605 in the conveying direction F and the gear 653, in particular the conversion gear 657, is arranged upstream of the cutting edge 605 in the conveying direction F. In the embodiment shown, a transmission gear 655 is provided between the axis of rotation D3 and the drive 651 for translating the drive rotation. The transmission gear 655 is preferably a worm gear. Furthermore, the transmission 655 can additionally be designed to offset the axis of rotation of the drive 651, in particular by 90 ° to the axis of rotation D3.

Preferably, one of the feed wheels of the feed wheel pair is not driven directly by the drive 635. The not directly driven feed wheel 301 is preferably driven indirectly via the driven feed wheel 641. This is particularly preferably achieved in that the non-driven feed wheel 301 is biased against the driven feed wheel 641. As can be seen in particular in FIGS. 1 to 3a, the pretensioning is realized in particular by undersizing the distance between the wheel axles 303, 305 from one another. Due to the undersizing of the feed wheel center distance ZA, the feed wheels are elastically preloaded against one another. In order to set the feed wheel axis distance ZA, at least one of the feed wheels 641, 301 can preferably be moved or braced with the other feed wheel. A tensioning device 307 is preferably provided for this purpose, with which one of the feed wheels 641, 301 is braced with the other feed wheel 301, 641 via wall sections of the device 601. The tensioning device preferably comprises a wheel receptacle 309 connecting the feed wheel 301 to the lower and upper boundary wall (not shown) and at least one, preferably two, fastening means 313 connecting the wheel shaft 311 of the feed wheel 301 to the wheel receptacle 309, such as a screw 313 (only for the discharge wheel pair 615 shown). As shown in FIG. 1, the tensioning device 307 is preferably attached to the non-driven feed wheel 301. The feed wheel axis distance ZA, can be adjusted, for example, by actuating the fastening means 313, while the driven feed wheel 641 remains in a constant position with respect to the drive 635. Thus, in particular, the tension between the feed wheels, in particular depending on the fiber starting material to be processed or the desired one

Packaging material product geometry can be adapted, in particular without significantly increasing the development effort of the device 601.

Alternatively or additionally, the discharge wheels 649, 315 are braced against one another. The tension between the removal wheels 315, 649 is particularly preferably set via an under-dimensioned removal wheel axis distance AA between the wheel axis 317 of the driven removal wheel 649 and the wheel axis 319 of the non-driven removal wheel 315. The discharge wheel axis distance AA can be set as described for the feed wheel pair 613 via a tensioning device 321. The tensioning device 321 of the discharge wheel pair 615 preferably also has a wheel receptacle 323 with which the output shaft 325 of an output wheel 315, 649 is fastened to the device 601 and a connecting means 313 for connecting the wheel shaft 325 to the wheel receptacle 323 of the tensioning device 321.

An underdimensioned wheel axle distance is to be understood in particular to mean that the distance between the wheel axles 303, 305, 317, 319 of a wheel pair is smaller than the sum of the radii of both wheels, in particular in the disassembled state. This can be ensured in particular by a certain elasticity of the feed wheels. It is therefore preferred to design the feed wheels from an elastomer body, such as a PU foam body, or to provide them with an elastically deformable rolling region on their outer circumference. The elasticity of the feed wheels can also be increased by introducing several, in particular between six and fourteen, recesses 327, in particular recesses 327 evenly distributed in the circumferential direction. In order to ensure that the elasticity of the feed wheels is largely independent of the rotational position, the recesses 327 are preferably made uniformly in the peripheral wheels in the circumferential direction.

The device 601 shown in FIGS. 1 to 4 shows the state in which no strand of packaging material 611 is in engagement with the conveyor wheel pairs 613, 615. In this state, the wheels of the pairs of feed wheels contact each other preferably by the mutual bracing in a particularly circular manner or elliptical contact surface. If, on the other hand, the conveyor wheel pairs 613, 615 are in engagement with the strand of packaging material, the respective conveyor wheels are preferably separated from one another by the strand of packaging material. In a less preferred embodiment, the feed wheels only touch or are spaced from one another, so that a force transmission between the feed wheels of a feed wheel pair 613, 615 only occurs when the

Packaging material strand 611 is engaged with the respective conveyor wheel pair. The wheel axes 317, 319 of the feed wheel pair and / or the wheel axes 303, 305 of the feed wheel pair are preferably aligned with one another in such a way that the tangent TAZ of the feed wheel pair and / or the tangent of the feed wheel pair TAA run parallel to the conveying direction F. In this context, tangent should in particular not exclusively be understood to mean that the feed wheels only touch, but rather, in the preferred embodiment in which a contact surface is created between the feed wheels, a line extending in the feed direction between the first contact point and the last contact point be considered as tangent.

In less preferred embodiments, the wheel axles 303, 305, 317, 319 of each wheel pair 615, 613 can be offset from one another in such a way that the tangent TAZ of the feed wheel pair and / or the tangent TAA of the discharge wheel pair are inclined with respect to the conveying direction F. The wheel axes of a pair of feed wheels are particularly preferably arranged in such a way that the tangents TAZ and TAA run parallel to one another and are particularly preferably identical. This can be achieved in particular by arranging the wheel axles 303, 305, 317, 319 of each wheel pair 613, 615 one above the other, in particular in the cutting direction S.

A conveying channel 619 extends in the conveying direction F at the level of the cutting device 603 and is delimited by a boundary wall 617. The conveying channel 619 preferably extends in the conveying direction upstream and downstream of the cutting device up to the feed wheel pair 613 and the discharge wheel pair 615, preferably beyond the feed wheel pairs. A gap 629 is configured in the boundary wall 617 in such a way that the cutting edge 605 can move into and out of the gap 629 without contact.

Before the packaging material product 609 is separated from the packaging material strand 611, the packaging material strand 611 extends between the conveyor wheel pairs 613, 615. As can be seen in the comparison of FIGS. 1 to 3, the cutting edge 605 preferably runs through the conveyor channel 619 in a purely translatory manner. In particular, the cutting edge 605 traverses transversely, preferably orthogonally to the conveying direction. The device is preferably oriented such that the cutting edge 605 traverses the conveying channel 619 horizontally. Passing through is to be understood in particular to mean that the cutting edge moves from the cutting start position into the cutting end position in the cutting direction S from one side into the conveying channel 619 and exits from the conveying channel 619 via the opposite side in the cutting direction S. The feed channel 619 is entered in particular via a retraction gap 633 which is introduced in the boundary wall 617. The delivery channel 619 is extended in particular via a gap 629 which is introduced in the boundary wall 617. The configurations of the gap 629 and the withdrawal gap 633 are described in detail in connection with the schematic illustration in FIG. 5.

The gap 629 and the retraction gap 633 are preferably designed to be flush with one another in the cutting direction S, so that the cutting edge 605 can move into and out of the conveying channel 619 in a translatory, in particular purely translatory, manner. The counter edges 623, 623 ', 627, 627' are preferably adapted to the guidance of the cutting edge 605 in such a way that the cutting edge 605 can move into and out of the conveying channel 619 without contact. As can be seen in particular in FIGS. 3a and 3b, the distance a between the counter edge 623 delimiting the gap 629 in the conveying direction F upstream from the cutting edge 605 in the conveying direction F can be designed to be smaller than the distance a 'between the delimiting the retraction gap 633 in the conveying direction upstream Counter edge 623 'and the cutting edge 605 in the conveying direction. By minimizing the distance a between the upstream counter edge 623 and the cutting edge 605 in the conveying direction F when entering the gap 629, the function of the counter edge 623 as a system-supporting edge can be enhanced. If the distance a is made too small, however, it can also increase the risk that the packaging material strand 611 will be clamped in the gap 629 and blockage of the packaging material will result. The aforementioned preferred dimensions of the distance a therefore represent a preferred compromise between these two effects. In contrast, the counter edge 623 'which delimits the withdrawal gap 633 upstream does not at least have the same effect which supports the separation process, so that the distance a' is designed to be larger in the conveying direction can be. The counter edge 623 'causes in particular wiping off snippets adhering to the cutting edge 605 or the packaging material strand 611.

As described above, the conveying channel 619 is delimited in the conveying direction F upstream of the gap 605 by an upstream wall section 621 and downstream of the gap 629 by a downstream wall section 625. If the conveying channel 619 is traversed before or after in the cutting direction S, this means in particular that the cutting edge passes through the section of the conveying channel 619 delimited by the upstream wall section 621. In particular, the cutting edge should be in the cutting start position in the cutting direction S outside of the conveying channel 619 in order to prevent the cutting edge 605, in particular on the cutting tip 631, from getting caught between the pairs of conveying wheels 613, 615 when the packaging material strand 6 is conveyed.

As can be seen in particular in FIG. 3B, the cutting tip 631 of the cutting edge 605 should protrude significantly, in particular in the cutting end position, in particular by the distance d between the cutting tip 631 and the counter edge 623 delimiting the gap 629 upstream. The distance d is preferably greater than a distance c between the counter edges 623 and 627 delimiting the gap 629, so that the tip 631 of the cutting edge 605 also extends beyond the counter edge 627, in particular by the distance e, in the cutting end position. Moving the cutting tip 631 out of the conveying channel 619 ensures in particular that when the packaging material product 609 is separated from the

Dust and cutting snippets of packaging material 611 are conveyed out of the conveying channel 619, in particular are thrown out and / or are stripped off at the counter edges 623, 627 when they are re-entered into the conveying channel so that they do not re-enter the conveying channel 619. The previously described preferred dimensions of the distances d, e, a and b therefore represent an advantageous compromise between the advantages of the dust and

Chip removal and the support of the separation by the counter edge 623 and the risk of clogging and wear of the cutting edge 605.

The distance c between the upstream counter edge 623 and the downstream counter edge 627 serves in particular to ensure that the strand of packaging material 611 when the packaging material product is separated 619 comes into contact with the upstream wall section 621 in the conveying direction F, but remains contact-free with respect to the wall section 625 arranged downstream of the gap 629 in the conveying direction. In particular, this can reduce the risk that the packaging material strand 611 or the packaging material product 609 is pulled into the gap 629 and thereby causes a blockage. The same applies to the distance c 'between the counter edges 623' and 62 / delimiting the withdrawal gap 633. Overall, it is advantageous if the section of the conveying channel 619 formed downstream of the cutting edge 605 in the conveying direction F is widened in the cutting direction compared to the section of the conveying channel 619 formed upstream of the cutting edge 605.

The boundary wall 617 preferably has a funnel-shaped section 659, 661 in the conveying direction F upstream of the feed wheel pair 613 and / or the discharge wheel pair 615, which tapers in the conveying direction F. The tapering of the funnel-shaped section 659, 661 preferably occurs in the cutting direction S. Alternatively or additionally, the taper can be formed in a direction orthogonal to the conveying direction and the cutting direction. The funnel-shaped section 659, 661 can be round or angular. In the embodiment shown here, the funnel-shaped section is angular and only has a taper in the cutting direction S. The tapering of the conveying channel 619 is preferably formed in the region of the conveying channel 619 in which the packaging material strand 611 comes into engagement with the feed wheel pair 613 and / or the discharge wheel pair 615. By tapering the conveyor channel 619, on the one hand the degree of deformation of the essentially two-dimensional paper web in the three-dimensional packaging material strand can be increased and the engagement with the conveyor wheel pairs 613, 615 can be facilitated.

FIG. 5 shows a schematic representation of a device 601 for producing a packaging material product 609 (not shown in FIG. 5) from a fiber starting material, in particular from a paper cushion strand formed in the device from a single or multi-layer paper web (not shown in FIG. 5). . The device has a cutting edge 605 of a cutting device for separating the packaging material product 609 from a packaging material strand 611. A pair of feed wheels 613 for conveying the strand of packaging material 611 is arranged upstream of the cutting edge 605 in the conveying direction F. Furthermore, a pair of discharge wheels 615 is arranged downstream of the cutting edge 605 in the conveying direction F for conveying the strand of packaging material 611. The position of the cutting edge 605 shown in FIG. 5 is a schematic illustration of the preferred cutting end position. The cutting edge 605 preferably moves in a purely translatory manner from a cutting start position in the cutting direction S to the cutting end position. The cutting direction S is particularly preferably transverse or orthogonal to the conveying direction F. The cutting edge can also be guided in such a way that it at least traverses the packaging material strand 611 translationally, in particular in the cutting direction S when the packaging material product 609 is separated. The cutting edge 605 can also be guided at least in such a way that it cuts through the packaging material strand 611 translationally in the cutting engagement transversely to the conveying direction. In this case, the cutting edge does not necessarily have to move translationally through the entire strand of packaging material 611, but in particular can also only translate in a cutting engagement with the packaging material strand 611. It is preferred that the cutting direction S is transverse, particularly preferably orthogonal, to the conveying direction F and / or horizontal.

The device 601 has a delivery channel 619 which is delimited by a boundary wall 617. The conveying channel 619 particularly preferably extends in the conveying direction F at least between the two pairs of conveying wheels 613, 615. In a less preferred embodiment, the conveying channel extends at least at the conveying direction height of the cutting device or the cutting edge 605. It is particularly important that the conveying channel 619 is particularly important limit immediately upstream and downstream of the cutting edge 605. The conveyor channel 619 is delimited by a boundary wall 617. A gap 629 is configured in the boundary wall 617 in such a way that the cutting edge 605 can move into and out of the gap 627 without contact. In the conveying direction F upstream of the gap 629, the conveying channel is delimited by a wall section 621 which has an upstream counter edge 623 delimiting the gap in the conveying direction F upstream. In the conveying direction downstream of the gap 629, the conveying channel 619 is delimited by a downstream wall section 625 which has a downstream counter edge 627 delimiting the gap 629 in the conveying direction F downstream.

The cutting edge 605 is preferably spaced apart from the downstream counter edge 627 and from the upstream counter edge 623 in the conveying direction F when entering and leaving the gap 629. 5 shows the particularly preferred embodiment, in which the cutting edge 605 during the movement from the cutting start position into the cutting end position is purely translational and orthogonal to Conveying direction F moves, shown, so that the distances of the counter edges 623, 627 to the cutting edge 605 in the conveying direction F are constant. In less advantageous embodiments, however, the cutting edge can also move transversely to the conveying direction F at an obtuse or acute angle, or can move in part in a rotary manner. In such embodiments, the position of the cutting edge 605 when moving into and out of the gap is relevant for determining the distance between the cutting edge and the counter edge. If the counter edges 623 and 627 are at the same height in the cutting direction S, the position of the cutting edge when entering and exiting the gap is identical. However, if the counter edges 623, 627 are offset from one another in the cutting direction, as shown in FIG. 5, the entry into the gap 629 is defined by the position of the cutting edge 605, in which the cutting edge during the movement from a cutting start position into a cutting end position with the cutting tip 631 Height of the first counter edge, here the upstream counter edge 623, reached. The movement out of the gap 629 is in turn determined by the position of the cutting edge 605, at which the cutting tip 631 reaches the height of the second counter edge, here the downstream counter edge 627, when moving from the cutting start position into the cutting end position.

According to the second aspect of the present invention, the cutting edge both moves into the gap without contact and out of the gap 629 again without contact. The distance between the upstream counter edge 623 and the cutting edge 605 when entering and leaving the gap is shown in FIG. 5 with the reference number a. The distance between the downstream counter edges 627 and the cutting edge when entering and exiting the gap 629 is shown in FIG. 5 with the reference number b. The preferred distance between the upstream counter edge 623 and the downstream counter edge 627 in the cutting direction is shown in FIG. 5 with the reference number c. The distance over which the cutting edge 605 travels in the cutting direction S beyond the upstream counter edge 623 when entering the gap is shown in FIG. 5 with the reference number d. The distance by which the cutting edge 605 extends beyond the downstream counter edge 627 when retracting and extending, in particular in the cutting end position, is shown in FIG. 5 with the reference number e.

The device 601 can additionally have a retraction gap 633 formed in the boundary wall 617, which is designed in such a way that the cutting edge can move into and out of the conveying channel 619, in particular without contact. The withdrawal gap 633 is preferably formed on a section of the boundary wall 617 opposite the gap in the cutting direction S. The withdrawal gap 633 and / or the gap 629 opposite is particularly preferred Section of the boundary wall 617 is formed like the gap 629 and / or as the wall sections surrounding the gap. This is to be understood in particular to mean that the conveying channel 619 in the conveying direction F upstream of the withdrawal gap 633 is delimited by an upstream wall section 621 'which has an upstream counter edge 623' which delimits the withdrawal gap 633 in the conveying direction upstream.

As an alternative or in addition, this is to be understood to mean that the conveying channel 619 in the conveying direction F downstream of the withdrawal gap 633 is delimited by a downstream wall section 625 ′ which has a downstream counter edge 62 / which delimits the withdrawal gap 633 in the conveying direction F downstream.

The cutting edge 605 is preferably spaced apart from the upstream counter edge 623 ′ in the conveying direction F and / or spaced in the conveying direction F from the downstream counter edge 62 / in the conveying direction F.

Furthermore, as an alternative or in addition, it is to be understood that the downstream counter edge 627 ′ and upstream counter edge 623 ′ are spaced apart from one another in the cutting direction, in particular the downstream counter edge 62 / from the cutting tip 631 in a cutting end position in the cutting direction S is spaced further apart than the upstream counter edge 623 ". The distance between the upstream counter edge 623 'and the downstream counter edge 62 / in the cutting direction is shown in FIG. 5 under reference symbol c'. The distance between the cutting edge 605 when inserting and exiting the withdrawal gap 633 to the upstream counter edge 623 is shown in FIG. 5 with the reference number a ′. The distance between the downstream counter edge 62 / and the cutting edge 605 when entering and exiting the withdrawal gap 633 is shown in FIG. 5 with the reference number b '.

The embodiments of the wall sections, the counter edges and the distances between the wall sections, in particular the counter edges and the cutting edge in the area of the gap 629, described above and below, represent embodiments of the corresponding components in the area of the retraction gap 633 and vice versa. At distances which are in the cutting direction S 5, however, care must be taken that the position of the upstream and downstream counter edges 623 ', 627' is in each case the opposite direction is to be carried out, like the distances of the counter edges 623, 627 in the cutting direction S.

FIGS. 6 to 9 schematically show the sequence of a preferred method for producing a packaging material product 609. FIG. 6 shows the conveying of the packaging material strand between two conveyor devices in the form of conveyor wheel pairs 613, 615. In it, the packaging material strand 611 is fed to a cutting device 603 via a pair of feed wheels 613. In FIGS. 6 to 9, only a cutting edge 605 of the cutting device 603 is indicated in the form of an arrow. As can be seen in FIG. 6, the packaging material strand 611 is conveyed in the conveying direction F beyond the cutting edge 605 of the cutting device to a removal device. The discharge device is shown here in the preferred embodiment of a pair of discharge wheel 615 described above. The packaging material strand 611 is preferably conveyed in the conveying direction until it comes into engagement with the discharge wheel pair 615. When conveying the packaging material strand 611 the Zuförderradpaar and Abförderradpaar are each provided with a Zuförderdrehzahl _to n and a n Abförderdrehzahl _from driven. By independently driving the feed wheel pair 613 and the feed wheel pair 615, the rotational speeds n _zu and n _ab can be set arbitrarily both in terms of their height and in relation to one another. Depending on the material of the packaging material strand, it can be advantageous _to coordinate the speed n n and n _{ab in} such a way that the packaging material strand 611 is already under tension during conveying.

FIGS. 6 to 9 show a preferred embodiment of a method for manufacturing packaging material products. This method relates to the production of a packaging material product 609, in which a packaging material strand 611 is fed to a cutting device via a feed device 613, the packaging material product 609 is separated from the packaging material strand 611 with the cutting device 603, and the packaging material product 609 is conveyed away via the removal device 615. The feed device 613 and the discharge device 615 are driven and / or braked independently of one another before the separation of the packaging material product 609, as described in particular in connection with FIG. 7, in such a way that the packaging material strand 611 is stretched between the conveying devices 613, 615. 7 shows a preferred embodiment of the tensioning of the packaging material strand 6n, in which the feed wheel pair 613 is braked, in particular stopped, and the feed wheel pair 615 is driven over a predetermined angle f. Preferably, the predetermined angle f ist, by which the driven discharge wheel 649 is rotated, becomes smaller than a desired angle f _S oii, ab, by which the pair of discharge wheels 615, in particular the driven discharge wheel 649, is driven. The difference between the predetermined angle fi _{st, ab} and the target angle f _S oii, ab arises in particular by the fact that the feed wheel pair 613 is braked, in particular stopped, in such a way that the wheels 641, 301 of the feed wheel pair of the rotational movement of the wheels 649, 315 of the discharge wheel pair at least not completely follow. 7 as seen in Fig., The wheels of the Zuförderradpaars may also rotated by the transmitting over the packaging material strand 611 to the voltage Zuförderradpaar 613 613, in particular by an angle fi _S t are rotated _to. However, the drive wheels 641, 301 are braked or stopped such that the predetermined angle fi _S t, _at which the feed wheels is smaller than the predetermined angle fi _{st, from} the discharge wheels, so that a tension in the packaging material strand 611 arises. Braking can take place, for example, in that a drive which drives the feed wheel pair 613 notifies the feed wheel pair 613 of a braking torque which is opposite to the feed direction F. Alternatively or additionally, braking of the feed wheel pair 613 can also be carried out by stopping the feed wheel pair 613. For example, the feed wheels 301, 641 of the feed wheel pair can be braced against one another in such a way that even with a feed wheel pair that is not driven at the time of tensioning, there is resistance to a rotational movement of the feed wheels, so that the feed wheels 641, 301 do not move along the entire path that this Abförderradpaar 615 specifies.

As an alternative to the embodiment shown in FIG. 7, the tension of the packaging material strand 611 can also be carried out in an analogous manner by braking, in particular stopping, the pair of discharge wheels 615 and by driving the pair of feed wheels 613 in the direction opposite to the direction of conveyance F. In addition, the clamping can also be carried out by driving both pairs of feed wheels at different speeds, or by driving the pairs of feed wheels in different directions, in particular the pair of feed wheels in the direction opposite to the direction of conveyance F and the pair of discharge wheels 615 in the direction of conveyance F. FIG. 8 shows the separation of the packaging material product 609 from the packaging material strand 611. The position is shown in which the cutting edge 605 has already penetrated the packaging material strand 611, but has not yet completely severed it. When the cutting edge penetrates the packaging material strand, the cutting edge 605 notifies the packaging material strand 611 of a force in the cutting direction S, which transmits a torque to the feed wheels of the feed wheel pair 613 and the feed wheel pair 615. Depending on the sharpness of the cutting edge 605, possibly braking torque of the stopped or braked feed wheel pair and / or the force with which the feed wheel pairs are possibly braced against one another, the insertion of the cutting edge 605 into the packaging material strand 611 can also cause a rotation of the feed wheel pair by a difference angle Df s, _to and / or the Abförderradpaares 615 by a difference angle Df s, cause. As is clear from the comparison by FIGS. 7 and 8, the separation can thereby increase the difference between the desired angles Df s, _zu , Df s, ab and the predetermined actual angles fi _St , _zu and f ist , from effect.

FIG. 9 shows a preferred state after the separation process, in which the packaging material strand 611 and the packaging material product 609 are preferably located centrally in the conveying channel, in particular outside the gap 629. This state can be achieved in particular by the fact that the set angles f soii, _zu and f _S oii, stand on themselves as a result of the separation of the packaging material product and thereby the

Convey packaging material product 609 in the conveying direction F and / or the packaging material strand 611 in the direction opposite to the conveying direction F, in particular pull it out of the gap 629. Thus, by coordinating the predetermined angles fi _S t, _zu and f ist, from the feed wheel pair 613 and the Abförderradpaar 615 and the target angle f _S oii, _zu and f _S oii, from the feed wheel pairs 613, 615, in particular automatically , Mechanism for avoiding clogging of packaging material can be integrated in a method and / or in a device for manufacturing packaging material. In particular, by independently driving the pairs of conveyor wheels, this mechanism can be individually adjusted depending on the fiber starting material to be processed and the desired packaging material product to be produced by adapting the desired angles and, if necessary, the braking torques. The features disclosed in the above description, the figures and the claims can be important both individually and in any combination for realizing the invention in the various configurations.

Reference symbol list

301 unpowered feed wheel

303 Wheel axis of the non-driven feed wheel

305 wheel axis of the driven feed wheel

307 Clamping device of the feed wheel pair

309 wheel holder of the clamping device 307

311 wheel shaft of the non-driven feed wheel 301

313 connecting means of the clamping device

315 unpowered discharge wheel

317 Wheel axis of the driven discharge wheel

319 Wheel axis of the non-driven removal wheel

321 Clamping device of the discharge wheel pair

323 wheel holder of the clamping device 321

325 wheel shaft of the non-driven from conveyor wheel

327 recess in feed wheel

601 device

603 cutting device

605 cutting edge

609 packaging material product

611 strand of packaging material

613 feed wheel pair

615 pair of discharge wheels

617 boundary wall

619 delivery channel

621, 621 'upstream wall section

623,623 'upstream counter edge

625,625 'downstream wall section

627,627 'downstream counter edge

629 gap

631 cutting tip

633 retreat gap

635 drive, electric motor of the feed wheel pair 637 Gear of the feed wheel pair

639 Drive shaft of the driven feed wheel pair

641 driven feed wheel

643 drive, electric motor of the conveyor wheel pair

645 gear of the discharge wheel pair

647 Drive shaft of the driven conveyor wheel pair

649 driven discharge wheel

651 drive, electric motor of the cutting device

653 Gear of the cutting device

655 transmission gear

657 conversion gear

659 funnel-shaped section of the feed wheel pair

661 funnel-shaped section of the discharge wheel pair

663 cutting teeth

665 Installation section of the cutting edge

667 sledge of the cutting edge

669 holes in the cutting edge

671 joint section (facing the transmission gear 655)

673 joint section (facing the slide 667)

675 Guiding the cutting edge in the cutting direction

677 guide cylinder

679 sled shoe

T depth of paper cushion making machine

F direction of conveyance

S cutting direction

AA discharge wheel center distance

ZA feed wheel center distance

TAZ Tangent of the feed wheel pair

TAA tangent of the discharge wheel pair

The axis of rotation between the two joint sections 671 and 673

D2 axis of rotation between the joint section 673 and the slide 667

D3 axis of rotation between the joint section 6 71 and the

655 transmission

a, a 'Distance between the upstream counter edge and the cutting edge in

Cutting direction b, b 'Distance between the downstream counter edge and the cutting edge in the cutting direction

c, c 'distance between the downstream counter edge and the upstream

Counter edge in the cutting direction

d Distance between cutting tip and upstream counter edge in

Cutting end position of the cutting edge

e Distance between the cutting tip and the downstream counter edge in

Cutting end position of the cutting edge.

n _to feed speed

n _from discharge speed

f, at predetermined angles of the feed wheel pair

f is, from a predetermined angle of the discharge wheel pair

f target, to target angle of the feed wheel pair

f set, from set angle of the discharge wheel pair

Df S, to the difference angle through the cutting process on the feed wheel pair Df s, from the difference angle through the cutting process at the discharge wheel pair t Start of the production process

t ₂ start of tensioning

t ₃ start of separation

Incision

Claims

Expectations

A device (601) for producing a packaging material product (609) from a fiber starting material, such as a single or multi-layer paper web or a corrugated cardboard web, in particular from recycled paper, comprising:

a cutting device (603) for severing the

Packaging material product (609) from a packaging material strand, such as a corrugated cardboard web or in the device (601) from the

Fiber stock material formed three-dimensional paper cushion strand (611); a feed wheel pair (613) arranged upstream of the cutting device (603) in the conveying direction (F) for conveying the strand of packaging material (611); and a pair of discharge wheels (615) arranged downstream of the cutting device (603) in the conveying direction (F) for conveying the strand of packaging material (611);

in which

a cutting edge (605) of the cutting device (603) is guided in such a way that it cuts the packaging material strand (611) translationally in the cutting engagement transversely to the conveying direction (F).

2. Device (601) according to claim 1, wherein

the cutting edge (605) is guided such that it traverses the packaging material strand (611) in a translatory manner and / or traverses and / or traverses horizontally to the conveying direction, preferably orthogonally to the conveying direction.

3. Device (601) according to claim 1 or 2, wherein

the cutting edge (605) is guided in such a way that it is at least open

The conveying direction height of the cutting device (603) in the conveying direction (F), which is delimited in particular by a boundary wall (617), translates and / or transversely to the conveying direction, preferably orthogonally to the conveying direction, and / or horizontally.

4. Device (601) according to one of the preceding claims, wherein the cutting edge (605) has a plurality of, preferably between 2 and 10, particularly preferably between 4 and 8, cutting teeth (663), the cutting teeth (663) preferably being in the cutting direction ( S) tapering triangles are formed, which preferably taper pyramid-shaped, in particular in the direction opposite to the conveying direction (F), and / or the cutting teeth (663) preferably adjoin one another.

5. The device (601) according to any one of the preceding claims, wherein the cutting edge (605) is driven via a rotary drive, in particular via a rotary electric motor, the rotary movement of the electric motor via a

Conversion gear, such as a toggle, is converted into a translatory motion.

6. The device (601), in particular according to one of the preceding claims, for producing a packaging material product (609) from a

Fiber starting material, such as a single or multi-layer paper web or a corrugated cardboard web, in particular made from recycled paper, comprising:

a cutting device (603) for severing the

Fiber stock material formed three-dimensional paper cushion strand (611); a feed wheel pair (613) arranged upstream of the cutting device (603) in the conveying direction (F) for conveying the strand of packaging material (611);

a pair of discharge wheels (615) arranged downstream of the cutting device (603) in the conveying direction (F) for conveying the strand of packaging material (611);

a conveying channel which extends at least at the conveying direction height of the cutting device (603) in the conveying direction (F) and which is guided by a

Boundary wall (617) is limited; and

a gap (629) formed in the boundary wall (617), which is designed such that a cutting edge of the cutting device (603) can move into and out of the gap (629) without contact.

7. The device (601) according to claim 6, wherein the conveying channel (619) in the conveying direction (F) upstream of the gap (629) is delimited by an upstream wall section (621) which upstream of the gap (629) in the conveying direction (F) limiting upstream counter edge (623).

8. The device (601) according to claim 7, wherein the cutting edge when entering and exiting the gap (629) in the conveying direction (F) is spaced apart from the upstream counter edge (623), preferably by 0.1 mm to 50 mm , 5 mm to 30 mm or 1.0 mm to 15 mm is spaced, preferably the distance (a) between the cutting edge and the upstream counter edge (623) in the conveying direction (F) when entering and leaving the gap (629), is particularly preferably constant over the entire travel path from a cutting start position to a cutting end position.

9. The device (601) according to claim 7 or 8, wherein

the cutting edge (605) moves in and out into the gap (629), in particular in the cutting direction (S), beyond the upstream counter edge (623), preferably by 0.1 mm to 200 mm, 0.5 mm to 100 mm or 5.0 mm to 50 mm beyond the upstream counter edge (623).

io. Device (601) according to one of claims 7 to 9, wherein the conveying channel (619) in the conveying direction (F) downstream of the gap (629) is delimited by a downstream wall section (625) which defines the gap (629) in the conveying direction (F ) has a downstream counter edge (627) delimiting downstream.

11 device (601) according to claim 10, wherein the cutting edge when entering and exiting the gap (629) in the conveying direction (F) is spaced from the downstream counter edge (627), preferably by 0.1 mm to 200 mm, 0, 5 mm to 100 mm or 5.0 mm to 50 mm is spaced, preferably the distance (b) between the cutting edge and the downstream counter edge (627) in the conveying direction (F) when entering and leaving the gap (629), particularly is preferably constant over the entire travel path from a cutting start position into a cutting end position.

12. The device (601) according to claim 10 or 11, wherein the cutting edge (605) moves in and out of the gap (629), in particular in the cutting direction (S), beyond the downstream counter edge (627), preferably by 0.1 mm to 150 mm, 0.5 mm to 70 mm or 5.0 mm to 30 mm beyond the downstream counter edge (627).

13. The device (601) according to any one of claims 10 to 12, wherein

the downstream counter edge (627) is offset in relation to the upstream counter edge (623) in the cutting direction (S), preferably by 0.1 mm to 200 mm, 0.1 mm to 100 mm, 0.1 mm to 50 mm, 0.5 mm to 30 mm or 5 mm to 10 mm is offset and / or is offset such that the packaging material strand and / or the packaging material product when the

Packaging material product remain contact-free with respect to the downstream wall section (625), in particular the downstream counter edge (627).

14. The device (601) according to any one of claims 6 to 13, wherein the cutting edge when entering and exiting into the gap (629) moves out of the conveying channel (619), preferably in such a way out of the conveying channel (619) that occurs during separation Dust and / or snippets from the delivery channel (619)

are thrown out, and / or the cutting edge protrudes from the conveying channel (619) by 0.1 to 150 mm, 0.5 to 70 mm, or 5.0 to 30 mm in a cutting end position.

15. The device (601) according to any one of claims 6 to 14, wherein

the gap (629) is introduced into the boundary wall (617), in particular the boundary wall is designed (617) in such a way that the cutting edge engages with the cut before entering the gap (629)

Packaging material strand (611) comes, preferably that

Packaging material product is separated before the cutting edge (605) enters the gap (629).

16. The device (601) according to any one of claims 6 to 15, the one in the

Boundary wall (617) formed retraction gap (633), the such The cutting edge can be moved in and out of the conveying channel (619), in particular without contact, the retraction gap (633) preferably being formed on a section of the boundary wall (617) opposite the gap (629) in the cutting direction (S) , wherein the withdrawal gap (633) and / or the opposite section of the boundary wall (617) is preferably designed like the gap (629) and / or the wall sections (621, 625) surrounding the gap (629).

17. The apparatus (601) according to claim 16, wherein the retraction gap (633) and the gap (629) are formed in the boundary wall (617) in such a way that the cutting edge during the movement from a cutting start position into a cutting end position via the retraction gap (633) retract the conveyor channel (619) and, in particular on a side of the conveyor channel (619) opposite in the cutting direction (S), can extend out of the conveyor channel (619) via the gap (629) and / or that

the cutting edge when moving from a cutting start position into one

End of cutting position first enters the feed channel (619) via the withdrawal gap (633), in the feed channel (619) in cutting engagement with the

Device of packaging material and exits via the gap (629) from the conveyor channel (619) and / or that

the cutting edge when moving from a cutting end position into one

Can start the cutting start position via the retraction gap (633) from the conveyor channel (619).

18. The apparatus (601) according to claim 16 or 17, wherein the cutting edge over the

Retraction gap (633) can be completely extended from the conveyor channel section adjoining the cutting edge in the conveying direction (F).

19. The device (601) according to any one of claims 16 to 18, wherein the

Retraction gap (633) extends transversely, preferably orthogonally, to the conveying direction (F) and / or to the cutting direction (S).

20. Device (601) according to one of claims 6 to 19, wherein the gap (629) transversely, preferably orthogonally, to the conveying direction (F) and / or

Cutting direction (S) extends.

21. The device (601) according to any one of the preceding claims, wherein the

The feed wheel pair (613), the discharge wheel pair (615) and the cutting device (603) are matched to one another such that the packaging material strand (611) is under tension, in particular when the packaging material product (609) is separated.

22. Device (601) according to one of the preceding claims,

A separate drive (635, 643) for independently driving and / or braking at least one wheel of the respective wheel pair (613, 615) is assigned to the feed wheel pair (613) and the discharge wheel pair (615),

the drives (635, 643) being driven and / or braked independently of one another, in particular via a higher-level control unit, in such a way that the pair of feed wheels (613) and the pair of discharge wheels (615)

Package of packaging material (611) before disconnecting the

Tighten the packaging material product (609).

23. The device (601) according to claim 1, wherein the feed wheel pair (613) and / or the discharge wheel pair (615)

the packaging material strand (611) is grasped between two conveyor wheels and is conveyed along or counter to the conveying direction (F) and / or along or against a feed-through direction defined by a common tangent to a respective outer circumference of the conveyor wheels.

24. The device (601) according to one of the preceding claims,

wherein the feed wheels of the feed wheel pair (613) and / or the discharge wheel pair

(615) are braced against one another, preferably with a force of at least 1 Newton 50 Newton, 100 Newton or 150 Newton, of at least 250 Newton, 350 Newton or 450 Newton, or of at least 550 Newton, 700 Newton or 900 Newton, and / or

the distance between the wheel axles (AA, ZA) of the feed wheels to each other of a pair of wheels (613, 615) is undersized such that the feed wheels are elastically preloaded against one another.

25. The device (601) according to one of the preceding claims,

wherein the wheel axles of at least one, preferably both, pairs of feed wheels (613, 615) each

run parallel to each other and / or

transversely, preferably orthogonally, to the conveying direction (F) or by a common tangent (TAZ, TAA) on a respective outer circumference of the

Conveyor wheels run through defined direction and / or

run along a plane that is transverse, preferably orthogonal, to the

Conveying direction (F) or a through direction defined by a common tangent (TAZ, TAA) on a respective outer circumference of the conveyor wheels.

26. The device (601) according to one of the preceding claims,

wherein the feed wheel pairs (613, 615) are in particular aligned with one another along a plane which has a wheel axis of a feed wheel pair (613, 615), preferably in each case both wheel axles of both feed wheel pairs (613, 615), as a normal vector.

27. The device (601) according to one of the preceding claims,

at least one wheel of at least one pair of conveyor wheels (613, 615) comprises an elastically deformable rolling region, the wheel preferably being formed by an elastomer body, such as a PU foam body, or having a corresponding outer coating.

28. A method for producing a packaging material product (609) from a fiber starting material, such as a single or multi-layer paper web or a corrugated cardboard web, in particular from recycled paper, wherein

the method is carried out with a device (601) according to one of claims 1 to 27.

29 packaging material, such as a strand of paper cushioning material or a

Corrugated cardboard web section, wherein the packaging material is produced by a device according to one of claims 1 to 27 and / or according to one

Method according to claim 28 is produced.