EP3812490B1 - Shielding device, shielding method and non-woven web-laying device - Google Patents

Description

The invention relates to a shielding device, a shielding method and a nonwoven laying device with the features in the preamble of the independent claims.

Such a non-woven layer with shielding is from EP 3 015 578 A1 and the EP 3 150 753 A1 known. Here, the pile web lying with its underside on a laying belt and transported to a movable upper carriage is completely covered on its upper side by a belt that is lying on it and is driven along with it. It is also disclosed that instead of the cover tape, a multiplicity of parallel wires or belts can be used to cover the upper side of the flor web in certain areas.

the DE 42 17 285 C1 deals with the delivery of a pile from the lower laying carriage onto the discharge belt of a web layer while compensating for an angle error, the laid web being covered by an additional cover belt and protective plates carried along on the laying carriage being arranged between the laying carriage and the cover belt.

the US 5,285,554A discloses a fleece laying machine with a moving pile web which is fed to an upper carriage of the fleece laying machine lying open and without shielding on a laying belt.

It is the object of the present invention to provide a better shielding technique.

The invention solves this problem with the features in the independent claims.

The claimed shielding technology, ie the shielding device, the fleece layer equipped with it and the shielding method, have various advantages.

The shielding device is an independently craftable and tradable item. It can be installed when crafting a fleece layer. However, it can also be retrofitted to an existing fleece layer. She is appropriately trained and prepared for this.

The claimed shielding technology makes it possible to use a housing to cover and protect the side surfaces of the flor web that is on the laying belt and is fed to an upper main carriage and extends along the web direction. The pile web has an underside, with which it lies on the laying belt, an upper side and the side surfaces located at the longitudinal edges and lying opposite one another. The bottom and the top have a width dimension that is greater than the height dimension of the peripheral side surfaces.

The cover has the function of shielding these side surfaces of the pile web from external environmental influences, in particular air currents. In addition, the exposed top of the pile sheet can be protected. A configuration of the shielding technology is particularly advantageous in which the housing covers and shields the web located on the laying belt at least in regions on all of its free surfaces on its feed path to the upper main carriage. The transfer belt and the pile run enter the moveable upper main carriage at an infeed point. The housing extends in the direction of the track at least as far as the movable entry point of the upper main carriage.

This makes it possible to transport the pile web transported on the running laying belt in a shielding channel which is closed at least laterally by the housing and on the underside by the laying belt. Air currents, in particular air vortices, can be kept from the running web in this way that they do not adversely affect the pile web. The shielding technique can in particular prevent the lateral longitudinal edges of the pile web from being pushed in or folded over, and possibly also a temporary lifting of parts of the pile web relative to the laying belt. Undesirable blowing and the associated structural changes in the web can also be avoided. A U-shaped shielding channel that is formed by the housing and the laying strip and is at least partially open at the top can suffice for this purpose. In a preferred embodiment, the shielding channel is also closed at the top and thus in the circumferential direction, at least in regions.

The housing can cover the said pile at least on one side at a distance. This distance can exist, for example, between the top of the pile and the roof area of the enclosure. As a result, a flow-calmed free space or air space can be formed above the pile web. The cover can also be spaced apart on the side faces of the pile web. This lateral distance can be less than the upward distance.

The enclosure can be installed or mounted stationary in fleece layers, for example. She may have a rigid education. The housing can be arranged above one main carriage, in particular the upper main carriage or upper carriage.

Due to a distanced cover, the pile web transported on the laying belt does not come into physical contact with the housing. A negative influence on the pile sheet by such touch contact can be avoided. The housing can, however, come into preferably sealing engagement with the running laying belt in order to thereby cover said said belt in a sealing manner to form a shield channel. The housing and the shielding channel formed can be open at the end faces or, if necessary, at least partially closed.

The housing has a wall that is impermeable to external environmental influences, in particular air currents. In an advantageous embodiment, the housing has a hood-like shape and at least partially covers the laying tape and the pile web located thereon. The wall is designed accordingly with side wall and roof areas. In another embodiment, the wall can only have lateral wall areas and be open at the top. On the other hand, the housing can be tightly connected to the laying belt, and at the connection point it is also possible to prevent external environmental influences, in particular air currents, from reaching the enclosed web.

The directional references above, below and to the side refer to the position of the pile web, in particular on the laying tape. In the case of a conventional design of the fleece laying device, the underside of the pile web lies on the laying belt. However, other configurations are also possible.

In the installation situation in the fleece layer, the housing can extend along the laying belt and the pile web in said web direction and along a travel path of one main carriage, in particular the upper carriage. Said route and the path direction can have the same longitudinal direction component. In particular, they can be rectified.

The housing can interact with the laying belt and be in sealing engagement with the laying belt, in particular with its lateral longitudinal edges. the The housing can overlap with the longitudinal edges transversely to the direction of the web and thereby preferably form a seal. The housing can have a different engagement with the laying tape over its length or in the direction of the web.

The enclosure can be subdivided into sections along its length. It can reach under the laying tape in a first sub-area and overlap in another sub-area. An open slit is left between the overlaps.

Said partial areas can be arranged one behind the other in the direction of the web and closely adjoin one another. Different wall sections can be formed on the wall, in particular a lower wall, on the partial areas. A support device, in particular a rotatable support roller, can be present at the transition point of the partial areas and wall sections for the laying tape with the pile web located thereon. This laying belt is also referred to as a pile-guiding laying belt or infeed belt. The side walls of the partial areas can overlap at the transition point and shield the fleece web laterally.

The overlapping and overlapping sections of the housing on the pile-guiding laying belt has advantages for the adaptation of the shielding and sealing effect to the travel movements of the upper main carriage, in particular the upper carriage. The sub-area or wall section with the lower grip of the housing on the laying belt can be located in an area outside the travel path of said upper main carriage. Said partial area or wall section with the overlap can be located in the travel area of said main carriage. Through the encroachment, the flexible laying tape with the overlying floret can with a driving movement of said The main carriage can be unrolled downwards from the enclosure or rolled upwards in a rolling movement. The lateral distance between the pile and the housing is advantageous for unrolling and rolling on and for the collision-free passage of the pile through the free slot between the overlaps. The shielding function is guaranteed for the supplied web up to its entry into said upper main carriage, in particular the upper carriage, and into its receiving and infeed area.

In the installation situation in the fleece layer, the housing can extend in length over the area susceptible to faults along the pile-guiding laying belt. The housing can, for example, extend in length, in particular over the route of the main carriage. The housing can extend from a feed-side and at least largely undisturbed area at the edge of the fleece layer, e.g.

The feed-side end area can be arranged on the face of the fleece layer and can be the entry area of the pile web into the fleece layer. The housing can end at this end area on the feed side.

In the installation situation, the housing can extend up to the said upper main carriage, in particular the upper carriage, if this is in an end position of its travel path which is furthest away from the said end region on the feed side. At this remote end position, the housing can overlap said main carriage and end at its rear edge area or behind it. The housing covers the entry point of the pile web in said upper main carriage, in particular the upper carriage. Also in the other track positions between the said end positions the enclosure extends over said upper main carriage.

The housing can have a straight extension. It can have the open ends mentioned. It may also be box-like and substantially C-shaped in cross-section with said slot. The cross-sectional shape can be prismatic or rounded. The housing and its wall have side walls extending along the direction of travel and possibly a roof wall adjoining them closely and a bottom wall adjoining the side walls, which laterally overlaps the laying belt, in particular its longitudinal edges. The lower wall can have the underreaching and overarching wall sections mentioned. In the middle area, it can have the said slit-like opening corresponding to the C-shape.

The housing can be designed to be adjustable in terms of its dimensions. In an advantageous embodiment, the height of the housing can be adjusted. In particular, the wall sections formed on the lower wall and reaching under and over the laying belt in sections can be adjusted in terms of their height and adapted to the laying belt. They can have a sealing covering on the contact area with the laying tape, in particular on its respective longitudinal edge.

In an advantageous embodiment, the fleece layer is designed as a cross-layer. Alternatively, it can be designed in a different way, for example as a longitudinal layer or the like. The fleece layer has several, for example two, main carriages. This can be an upper main carriage, also known as an upper carriage. On the other hand, there can be a lower main carriage, which is also referred to as a laying carriage. The upper main carriage may be the first in the web direction or in the direction of feed of the pile web be the main car. However, there can also be other main car designs.

The fleece layer can have one or more laying belts, at least one of which is guided over said one and in particular the upper main carriage or upper carriage. The web layer can be designed as a so-called tape layer. In an advantageous embodiment, it can have two or more, e.g. three, laying bands. The laying belt or belts can also be guided over one or more other main carriages, in particular over the lower main carriage or laying carriage.

The pile web can be embedded between two laying belts between the said main carriage, in particular the upper carriage and laying carriage. It can be transported directly from one main car to the other. The fleece layer is designed as a synchronous layer, in which the said main carriages always move in the same direction and with different path lengths and speeds. Alternatively, the pile web and the laying tapes can be guided between said main carriage via a stationary deflection in a machine frame of the fleece layer, with what is known as a counter-rotating fleece layer being formed in which said main carriages move in opposite directions with different path lengths and speeds.

The main carriages can be moved over a discharge belt of the fleece layer and deposit the supplied pile web on the discharge belt, with a single-layer or multi-layer fleece being formed. The housing of the shielding device is arranged on the one belt section of the laying belt that leads to the upper main carriage or upper carriage and on the flor web fed thereon.

The pile-guiding laying belt can be guided and stretched over deflection means. The deflection means can in particular be rotatable deflection rollers. The deflection means are located at an end area of the web laying device on the infeed side and are arranged here, for example, in a stationary manner. On the other hand, they are located on said upper main carriage, in particular the upper carriage.

A rotatable support roller or another support means arranged at the transition point between the wall sections reaching under and reaching over one another can additionally support the stretched-out laying tape. This support roller or the support means can be located in particular close to and outside of the said end point of the main carriage travel path, which is arranged closest to the feed-side end area of the web layer. The support roller or the support means can support and define the aforementioned rolling and rolling function of the laying belt on the underside of the housing during the travel movement of said main carriage. On the other hand, an additional support function for the wide-stretched laying belt can take place when said main carriage is in the end position furthest away from said end area. The support roller or the support means can be arranged on the shielding device or on the fleece layer.

The fleece layer can have one or more auxiliary carriages, which pull out and support a tape loop on a respective laying tape. These auxiliary carriages, which can be moved in the direction of travel, can each be coupled to a main carriage and can carry out a travel movement that is dependent on the movement of the main carriage.

An auxiliary carriage can be arranged and moved with a belt loop above the shielding device. An enclosure with a closed roof area or a shielding channel that is closed all the way around in the circumferential direction can protect the moving web from interference from this main carriage, for example air turbulence. On the other hand, the said auxiliary carriage can be arranged and moved on the fleece layer in a manner that is kinematic and space-efficient. Another auxiliary carriage can be arranged with its belt loop below the shielding device. In this case, it can be arranged between the shielding device and the removal belt of the fleece layer. The laying belt and the housing closely adjoining it protect the web fed on the laying belt from the interference of this auxiliary carriage and the belt loop.

The shielding device also has advantages for the formation of the web layer, in particular for the design and arrangement of one or more, for example two, auxiliary carriages. These can be arranged kinematically and space-efficiently in an area above the discharge belt. At least one auxiliary carriage can be arranged in an area between the upper and lower main carriages. This enables a compact design. This embodiment also has advantages over a practice-known arrangement of auxiliary carriages below the discharge belt. The construction effort with roller arrangements, support devices, clamping devices, etc. can be reduced. The overall height of the fleece layer can also be reduced. In addition, the fleece laying device can be adapted more cheaply to system components connected to the feed and discharge sides. A plant component on the feed side can be, for example, a web producer, in particular a card, an airlay or the like. A plant component on the discharge side can be a bonding device, in particular a needling machine, a water jet bonding or the like.

The fleece layer can have a machine frame, a carriage guide and a drive device. The main carriage or carriages and the auxiliary carriage or carriages that may be present can at least partially have a common carriage guide, which reduces the construction and space requirements and allows a compact design of the fleece layer. The shielding device is also advantageous for this purpose because a compact design could otherwise have particularly strong negative interference effects on the web that is fed. The circulatingly driven laying belts and the main carriage or carriages and the auxiliary carriage or carriages that may be present can have separate drive components of a drive device. The drive components can have a rotating drive movement or a translational drive movement, e.g. in the form of a linear drive for the main and/or auxiliary carriage. An electric linear motor, which can also have a guiding function, can be used to drive the main carriage or carriages and, if necessary, the auxiliary carriage or carriages.

In one embodiment, the shielding channel formed by the housing and the laying tape can be empty. In another variant that is not shown, means for influencing the running web and/or for influencing the air in the interior of the duct can be present in or on the shielding duct. Such means may, for example, be recessed vertical or sloping bulkheads or the like. Furthermore, air currents can be directed into the shielding channel and towards the running web. These can, for example, press the pile web against the running laying belt. With such air currents or the like, a stretching and/or compressing effect can also be exerted on the running web. This effect can be local. Such means can be, for example, guide walls, air flaps, blowing devices, suction devices or the like on the housing.

The shielding method for a moving pile web in a fleece layer, in particular a cross-lapper, provides that the pile web is fed on a laying belt of the fleece layer to an upper, movable main carriage of the fleece layer, in particular an upper carriage, in the direction of the web and on its way by means of a housing arranged in the fleece layer is shielded, which covers the side surfaces of the pile web located on the laying belt and extends along the web direction and shields against external environmental influences, in particular air currents. The pile web located on the laying belt is preferably covered on all of its free surfaces and shielded from external environmental influences, in particular air currents.

The housing, which is preferably hood-like and equipped with a wall that is impermeable to external environmental influences, in particular air currents, can tightly adjoin the laying belt. The pile web on the laying belt is covered at least on one side, in particular on the upper side, with a distance.

The housing interacts with the laying tape and is in sealing engagement with it. In particular, the housing can be in overlapping, preferably sealing engagement with the longitudinal edges of the laying strip transversely to the direction of the web.

The housing, which is subdivided into several, in particular two, sub-areas in the longitudinal direction or web direction, alternately and in a sealing manner engages under and over the laying belt, in particular its longitudinal edges in the sub-areas. In the first sub-area seen in the direction of the web, there is an undergrip and in the following sub-area there is an overgrip. The change from under attack to over attack takes place at a transition point that is Is arranged area of a feed side nearest end position of the upper main carriage or upper carriage. The section with the overlap of the enclosure is located in the area of the track of the upper main carriage or superstructure.

Further advantageous refinements of the invention are specified in the dependent claims.

The claimed shielding device and shielding method, as well as laying fleece, can have the following design features, which can be used individually or in combination.

The housing of the shielding device can be designed and arranged in such a way that the housing covers the web located on the laying belt on all of its free surfaces and shields it from external environmental influences, in particular air currents.

The housing of the shielding device can cover the pile web located on the laying belt and fed to the upper main carriage at least on one side at a distance, in particular on the upper side.

The housing of the shielding device can have a hood-like shape or a shape that is open at the top in the installed position. The housing can have a wall that is impermeable to external environmental influences, in particular air currents. The housing, in particular its wall, can be designed and arranged in the fleece laying device in such a way that it is closely connected to the laying belt.

The housing of the shielding device can be designed and arranged in the fleece layer in such a way that it extends along the laying belt and the pile web in the direction of the web and along a travel path of one main carriage, in particular the upper carriage.

The housing of the shielding device can be designed and arranged in such a way that it interacts with the laying strip and is in sealing engagement with the laying strip.

The housing of the shielding device can be designed and arranged in such a way that it overlaps with the longitudinal edges of the laying belt transversely to the direction of the web. This intervention can be sealing.

The housing of the shielding device can be subdivided into partial areas in the longitudinal direction. The housing can be designed and arranged in the web layer in such a way that, seen in the web direction, it grips under the laying belt, in particular its longitudinal edges, in a sealing manner in one partial area and overlaps in a sealing manner in the other partial area. The housing can reach under the laying tape on the underside and overlap on the top.

The sub-area with the lower grip of the housing on the laying belt can be arranged in an area outside of the travel path of the upper main carriage, in particular the upper carriage, on a web layer.

The partial area with the overlap of the housing on the laying belt can be arranged in an area within the travel path of an upper main carriage, in particular an upper carriage.

Along said main carriage path, the laying belt can be relatively unrolled from the housing or rolled onto the housing from the upper main carriage, in particular the upper carriage.

The housing of the shielding device and/or the fleece layer can have a support means arranged there at a transition point between the partial areas, in particular a rotatable support roller, for the web-guiding laying belt.

The housing of the shielding device can be designed and arranged in such a way that it can be arranged or arranged in the fleece layer so that it is arranged in the fleece layer above the upper main carriage, in particular the upper carriage.

The housing of the shielding device can be designed and arranged in the fleece layer in such a way that it extends in the fleece layer from a feed-side end area of the fleece layer to an upper main carriage, in particular the upper carriage, and possibly beyond it. The housing can extend from the feed-side end area of the web layer to an end position of the travel path of the upper main carriage that is closest to this end area. The enclosure may extend beyond and beyond the travel path of the upper main car.

The housing of the shielding device can be designed and arranged in such a way that it extends to an end position of the travel path of an upper main carriage, in particular an upper carriage, which is furthest away from a feed-side end region of the fleece layer.

The housing of the shielding device can be designed and arranged in such a way that it extends beyond the upper main carriage, in particular the upper carriage, at an end position of the path of travel of an upper main carriage, in particular the upper carriage, that is closest to an end region of the web laying machine on the feed side.

The housing of the shielding device can be designed and arranged in such a way that it extends over an entry point of the pile web on an upper main carriage, in particular an upper carriage. The housing can end, on the one hand, at an end region of the web layer on the infeed side and, on the other hand, at an end position of the travel path of an upper main carriage, in particular an upper carriage, which is furthest away therefrom.

The housing of the shielding device can have a support device designed for a stationary arrangement of the housing in the fleece layer. The support device can have a support structure for the wall of the housing, and support arms for fastening the housing in the fleece layer. The support device can also have a support arm for a support means, in particular a support roller, for supporting the laying belt.

The housing of the shielding device can have a straight extension.

The housing of the shielding device can have open end faces.

The housing of the shielding device can be box-like and essentially have a C-shape in cross section. In the installed position, the C-shape can be open at the bottom.

The housing of the shielding device can have side walls extending along the web direction. The housing can also have a roof wall that is tightly connected to the side walls. The housing of the shielding device can also have a lower wall adjoining the side walls in each case, which laterally overlaps the laying strip, in particular its longitudinal edges.

The lower wall can each have a wall section reaching under the laying belt, in particular its longitudinal edges, as well as a wall section following in the direction of the web and overlapping the laying belt, in particular its longitudinal edges.

The bottom wall can make sealing contact with the laying tape in the overlapping area. In the overlapping area, the lower wall can also have a sealing coating that is favorable for sliding. This also applies to the underlying and overarching wall sections.

The claimed non-woven layer, in particular cross-layer, can have one or more movable auxiliary carriages coupled to a main carriage, in particular clamping carriages for a belt loop of a laying belt.

An auxiliary carriage can be arranged with a belt loop above and/or below the shielding device and can be moved.

The claimed fleece layer, in particular cross-lapper, can have a machine frame, a carriage guide for the main carriage or carriages and, if necessary, one or more auxiliary carriages and a drive device for the one or more laying belts and for the main carriage or carriages and, if necessary, the auxiliary carriage or carriages.

Figur 1:

eine perspektivische Ansicht eines Vlieslegers mit einer Abschirmeinrichtung,

Figur 2:

eine andere perspektivische Ansicht des Vlieslegers von Figur 2,

Figur 3:

eine aufgebrochene Frontansicht des Vlieslegers von Figur 1 mit einer dargestellten Florbahn,

Figur 4:

einen perspektivischen Längsschnitt durch den Vliesleger und die Abschirmeinrichtung von Figur 1,

Figur 5 und 6:

eine Einhausung der Abschirmeinrichtung in einer perspektivischen Ansicht und einer Seitenansicht gemäß Pfeil VI von Figur 5,

Figur 7:

eine abgebrochene perspektivische Ansicht einer Übergangsstelle zwischen untergreifenden und übergreifenden Wandabschnitten der Einhausung,

Figur 8:

eine abgebrochene Stirnansicht der Anordnung von Figur 7 gemäß Schnittlinie VIII - VIII von Figur 6 und

Figur 9:

eine vereinfachte und abstrahierte Darstellung der Anordnung einer Einhausung an einem Vliesleger.

The invention is shown by way of example and schematically in the drawings. Show in detail:

Figure 1:

a perspective view of a fleece layer with a shielding device,

Figure 2:

another perspective view of the fleece layer of figure 2 ,

Figure 3:

a broken front view of the web laying of figure 1 with a depicted pile,

Figure 4:

a perspective longitudinal section through the web layer and the shielding of figure 1 ,

Figure 5 and 6:

a housing of the shielding device in a perspective view and a side view according to arrow VI of figure 5 ,

Figure 7:

a broken perspective view of a transition point between underreaching and overarching wall sections of the enclosure,

Figure 8:

a broken end view of the assembly of figure 7 according to section line VIII - VIII of figure 6 and

Figure 9:

a simplified and abstracted representation of the arrangement of a housing on a fleece layer.

The invention relates to a shielding device (3) for a moving web (2) and for installation on a fleece layer (1). The invention also relates to a shielding method and a fleece layer (1) equipped with the shielding device (3).

figure 1 shows a fleece layer (1) with a shielding device (3) for a moving web (2). The pile web (2) is, for example, designed like cotton wool and consists of loose and, for example, tangled fibers. It is designed as a non-woven product. The fibers can be synthetic fibers or natural fibers. The pile web (2) has an underside (6), an upper side (5) and two side surfaces (4).

The web (2) is fed to the web layer (1) in a feed direction (43) by a system component (not shown), e.g. a web producer, in particular a card, or an airlay. For this purpose, the fleece layer (1) can have a feed device (12), e.g. a feed belt. In the fleece layer (1), the supplied single-layer or multi-layer web (2) is laid down to form a single-layer or multi-layer fleece (24) on a discharge belt (23) and from there in the discharge direction (44) to a downstream system component, e.g. a bonding device, in particular a Needle machine or hydroentanglement.

The fleece layer (1) shown is designed as a cross-layer. It has a machine frame (8) with a lateral covering that is present at least in certain areas. The web laying device (1) has an end region (9) on the feed side on one end face. This can be designed as the entry area of the supplied pile web (2) into the fleece layer (1) and its machine frame (8).

The fleece layer (1) has several, e.g. two, main carriages (13, 14). The main carriages are arranged one above the other. The upper main carriage is referred to below as the upper carriage (13) and the lower main carriage as the laying carriage (14). The main carriages (13, 14) move back and forth across the circulating discharge belt (23) transversely or at an angle to the discharge direction (44). They are guided in the machine frame (8) by means of a carriage guide (17). The movements of the main carriages (13, 14) are directed transversely or at an angle to the direction of movement of the discharge belt (23) and to the discharge direction (44).

In the embodiment shown, the fleece layer (1) is designed as a layer that runs in the same direction, with the main carriages (13, 14) always moving in the same direction and at different travel path lengths and speeds. The lower main carriage or laying carriage (14) moves back and forth across the width of the discharge belt (23) and places the supplied web (2) on the discharge belt (23) to form the fleece (24). The upper main carriage or upper carriage (14) moves over half the travel distance of the lower main carriage or laying carriage (14) and moves at half the driving speed.

The fleece laying device (1) has one or more endless laying belts (10, 11) that are driven in rotation. In the embodiment shown, there are two laying tapes (10, 11). Alternatively, the number of tapes can be smaller or larger. The laying belts (10,11) transport the pile web (7). They are guided over the main carriage (13, 14) by means of deflection means (19), for example rotatable deflection rollers. Such deflection means (19) for the laying belts (10, 11) are also arranged in the machine frame (8). figure 4 clarifies the guide of the tape.

One laying belt (10) picks up the supplied pile web (2) at the end area (9) and transports it in web direction (7) to the upper main carriage or upper carriage (13). This laying belt (10) is referred to as an infeed belt or as a sheet-guiding laying belt. The other laying belt (11) forms a counter-belt, which is also guided over the upper main carriage or upper carriage (13). On the upper main carriage or upper carriage (13), the supplied web (2) is deflected in the opposite direction, preferably by 180°, where it is then picked up between the laying belts (11, 10) and transported to the lower main carriage or laying carriage (14). .

The upper main carriage or upper carriage (13) has an infeed point (22) for the laying belt (10) or infeed belt and the pile web (2). The counter-bath (11) can be fed in at the inlet point (22), which is designed, for example, like a funnel. A perforated pressure roller (45) for pressing, compressing and deaerating the web (2) can also be arranged in the funnel area. The laying belt (10) and the pile web lying thereon are deflected by 180° on the main carriage or upper carriage (13) via several, e.g. three, deflection means (19).

The fleece layer (1) shown also has one or more, for example two, auxiliary carriages (15,16) which can be moved parallel to the main carriage (13,14) on a preferably common carriage guide (17). The auxiliary carriages (15, 16) are designed, for example, as tensioning carriages, which each pull out a belt loop (20) of a laying belt (10, 11). This serves to compensate for fluctuations in the travel speeds of the main carriages (13, 14), for example for profiling the fleece (24) and to avoid thickening of the edges of the fleece (24).

The auxiliary carriages (15, 16) are each coupled to a main carriage (13, 14) in a suitable manner, e.g. by a traction device or by coupled drives. The upper auxiliary carriage (15) is coupled to the upper main carriage (13) and pulls out the belt loop (20) in the opposite belt (11). The lower auxiliary carriage (16) is coupled to the lower main carriage (14) and pulls out the belt loop (20) in the infeed belt (10).

The auxiliary carriages (15,16) are arranged above the discharge belt (23). One of the upper auxiliary carriages (15) is arranged with its belt loop (20) above the shielding device (3). The other auxiliary carriage (16) is arranged with its belt loop (20) below the shielding device (3). He moves in a space between said main carriages (13,14).

For the main and auxiliary carriages (13, 14, 15, 16) and the laying belts (110, 11) there is a drive device with separate or, in some cases, common drive components. These have, for example, controllable drives, e.g. electromotive servo drives or electric linear motors.

The fleece layer (1) has the aforementioned shielding device (3). This can be built in during layer production or retrofitted to an existing fleece layer (1). The shielding device (3) has a protective function for the moving web (2) fed on the laying belt (10) to the upper main carriage or upper carriage (13). figure 9 shows a simplified and abstracted representation of the fleece layer (1) and the shielding device (3) described below.

The shielding device (3) has a housing (25) which, in the installation position shown, extends the side surfaces (4) of the web on the Laying tape (10) covers the pile web (2) and against external environmental influences, especially air currents, shields. The housing (25) also covers, at least in certain areas, the upper side (5) of the pile (2) and thus all free surfaces of the pile (2) on the laying belt (10). The pile web (2) lies with its underside (6) on the laying belt (10). The side surfaces (4) are located on the longitudinal edges of the pile (2).

The housing (25) covers the pile web (2) on the laying belt (10) on at least one side, in particular on the upper side (5), preferably on all free sides or surfaces with a distance. The housing (25) shown has, for example, a hood-like shape and has a wall (26) that is impermeable to external environmental influences, in particular air currents. In the installed position, the housing (25) closely adjoins the laying belt (10), in particular at its longitudinal edges. In this case, the aforementioned shielding channel is formed by the housing (25) and the laying tape (10).

The housing (25) extends in the web direction (7) along the laying belt (10) and the pile web (2) lying thereon and along the travel path of the upper main carriage, in particular the upper carriage (13). The directions of extent can run parallel. They are preferably straight.

The housing (25) extends from the infeed-side end area (9) in the web direction (7) to the upper main carriage or upper carriage (13) and possibly beyond it. The housing (25) is arranged above said main carriage (13).

The end of the housing (25) on the feeding side is located in a trouble-free area of the web layer (1) and outside the travel paths of the carriages (13, 14, 15, 16). That The machine frame (8) has, for example, a yoke-like shape bridging the discharge belt (23) with upright, edge-side stands and connecting longitudinal beams and the carriage guides (17). The housing (25) can end on the feed side at the inner edge of the stand there and at the edge of the end area (9). It can also reach further into the end area (9) counter to the web direction (7).

The upper main carriage or upper carriage (13) moves back and forth on its travel path between end positions (41,42). One end position (41) is furthest away from the end region (9) on the feed side. she is in figure 1 and 4 shown. The end position (41) is outside the distant edge of the discharge belt (23). The other end position (42) is arranged closest to the end region (9) on the feed side. she is in figure 2 , 3 and 9 shown and is located approximately in the middle above the discharge belt (23).

The other end of the housing (25) is located, for example, over the most distant end position (41). The housing (25) overlaps the entry point (22) at which the web (2) supplied on the laying belt (10) enters the said upper main carriage (13) or upper carriage. As figure 4 clarified, the housing (25) extends to the rear edge of said main carriage (13) and possibly a little beyond. It can also cover the other laying belt or counter-belt (11) supplied, for example, at the top of said main carriage (13). The housing (25) can end close to a stationary deflection (19) for the other laying belt (11).

The housing (25) can have open end faces. Alternatively, the end faces can be closed except for an entry area for the pile web (2) and possibly the laying belt (10).

The housing (25) is e.g. box-like. It can essentially have a C-shape in cross section. The wall (26) can have a rounded and/or prismatic shape in cross section. The wall (26) can be solid and opaque. Alternatively, transparent areas, e.g. windows, can be arranged in one or more places. This does not affect the shielding effect and the airtightness of the wall (26).

The housing (25) and its wall (26) are arranged in the installed position in the fleece laying device (1) in such a way that they interact with the laying belt (10) on their underside and are in sealing engagement with it. The housing (25) is in continuous sealing engagement with the longitudinal edges of the laying belt (10) over the length. The housing (25) can overlap the longitudinal edges of the laying belt (10) transversely to the web direction (7).

The housing (25) has a different engagement with the laying belt (10) over its length or in the web direction (7). The housing (25) is divided into sections (46, 47) along its length. In a first partial area (46), it reaches under the laying belt (10), in particular its longitudinal edges. In another, adjoining partial area (47), the housing (25) overlaps the laying belt (10) or its longitudinal edges. The first partial area (46) with the lower grip extends from the feed-side end area (9) to the end area (9) closest to the end position (42) of the upper main carriage (13) or upper carriage. This sub-area (46) is outside of the main car route. The further partial area (47) with the overlap extends from the nearest end position (42) to the far end position (41) of the upper main carriage (13) or superstructure and possibly beyond.

At the transition point (48) between the first and the following or second partial area (46, 47) there can be a support means (21), e.g . At the transition point (48) the change from under grip to over grip of the housing (25) on the laying belt (10) takes place. The transition point (48) is arranged in the region of an end position (42) of the upper main carriage (13) or upper carriage that is closest to the feed side.

The partial area (47) with the overlap of the housing (25) is located in the area of the track of the upper main carriage (13) or upper carriage. The laying belt (10) is clamped and supported between a deflection means (19) arranged on the infeed end area (9) and a deflection means (19) arranged at the infeed point (22) and movable with said main carriage (13). The deflection means (19) can be designed, for example, as rotatable deflection rollers or in some other way. The laying tape (10) can be unrolled and rolled on relative to the housing (25) along said main carriage travel path. In the case of a travel movement directed toward the end region (9) on the feed side and counter to the web direction (7), the laying belt (10) is unrolled and released from the overlapping of the housing (25). During the opposite movement, the laying tape (10) is rolled onto the housing (25) and brought into contact with the overlap.

The wall (26) of the housing (25) has side walls (28, 29) which extend in the web direction (7) and preferably extend over the entire length of the housing (25). The housing (25) also has a roof wall (30) which is close to the upper edge of the side walls (28,29) connects. The roof wall (30) can extend over the entire length of the housing (25). Alternatively, it can only have a partial extent. It can, for example, end at a distance before the end of the housing (25) on the feed side. figure 1 , 2 and 6 show this abbreviated arrangement. The roof wall can also be missing.

The wall (26) has a bottom wall (31) adjoining the side walls (28, 29) and laterally overlapping the laying belt (10), in particular its longitudinal edges. At the overlapping points, there can be a sealing and possibly largely force-free touch or a small distance. The side, top and bottom walls (31) together form the wall (26). With a c-shaped cross section, there is a clearance or slot (49) between the bottom walls (31). The slot width can be adapted to the width of the pile (2). Figure 5 and 6 show this training, the roof wall (30) in figure 5 is not shown.

Said underhang or overhang is formed by the lower walls (31) on both sides. These are divided in the longitudinal direction or web direction (7) into wall sections (32, 33) with different heights and a height difference (h). The subdivision corresponds to the sections (46,47). The transition point between the wall sections (32, 33) can also be arranged on the support means (21).

The wall section (32) of the lower walls (31) on both sides located in the first partial area (46) reaches under the longitudinal edge of the laying belt (10). In the other partial area (47), the lower walls (31) on both sides of the other wall section (33) each overlap the longitudinal edge of the laying belt (10). figure 7 and 8th clarify this arrangement. figure 7 shows the transition point between the partial areas (46,47) and wall sections (32,33) in perspective and partly broken off view. figure 7 also clarifies the above-mentioned distance of the pile web (2) to the housing (25).

In the wall section (32) with the lower handle, the laying tape (10) rests on the respective lower wall (31) in the overlapping area. The side surfaces (4) of the web (2) on the laying belt (10) are spaced a little from the respectively adjacent side wall (28, 29) and have no physical contact with the housing (25). The upward distance between the top (5) and the roof wall (30) is greater than the aforesaid lateral distance. The shielding channel is formed here by the side walls (28, 29) and, if necessary, the roof wall (30) of the housing (25) and the laying strip (10), which rests sealingly on the lower walls (31).

In the wall section (33) with the overlap, the lower walls (31) on both sides rest on the laying belt (10) in the overlapping area and are also laterally spaced from the pile web (2). The pile web (2) is arranged on the laying belt (10) in the free space or slot (49) between the lower walls (31) on both sides. Your side surfaces (4) are covered by sub-walls (31). The shielding channel is formed by the housing (25) and the laying tape (10) sealingly resting on its underside and the lower walls (31).

figure 8 illustrates this arrangement of the lower walls (31) in the wall sections (32,33) in section. At the contact area with the laying belt (10) in the under and over grip, the lower walls (31) can each have a sealing and sliding-friendly covering (34). The covering (34) can also be resilient. The covering (34) can be a foamed plastic, for example.

Figure 4 to 7 illustrate the support means (21) and its position. The support means (21) can be arranged and supported on the shielding device (3) and/or on the fleece layer (1). It is located close to the end position (42) closest to the end region (9) and is at a distance from the entry point (22) and the deflection means (19) located there, counter to the web direction (7). As a result, at least part of the housing (25) in the wall area (33) is always in overlapping contact with the laying belt (2).

The sections (46,47) of the housing (25) can have common and continuous side walls (28,29). You can alternatively according to Figure 5 to 8 each have their own side walls (28,29). These can overlap one another at the transition point or can be spaced apart in web direction (7) with the formation of a gap, the gap being closed in a suitable manner, for example by part of the support means (21).

The housing (25) has a carrying device (36) which is used for the stationary arrangement of the housing (25) in the fleece layer (1). The carrying device (36) can be constructed in different ways. Figure 4 to 8 show an example.

The support device (36) has a support structure (37) for the wall (26) and support arms (38) for fastening the support structure (37) to the web layer (1). The shoring (37) has according to Figure 5 to 8 Longitudinal beams, which are firmly connected to the transverse support arms (38). Arranged on the longitudinal beams are support arms (38) directed transversely to the direction of the web (7) for a wall panel to rest on. The support arms (38) and the wall panel form the roof wall (30). On the other hand, the side walls (28, 29) are suspended from the side members. The lower walls (31) on both sides are available, for example, as an angle profile (35) educated. The lower, transverse leg of the angle profile (35) forms the overlap and at least regional support for the laying tape (10). The upright leg of the angle profile (35) rests against the respective side wall (28, 29) and can be detachably fastened here if necessary.

Upright support arms (39) can be provided for the support means (21), which are also suspended from the longitudinal beams of the support framework (37).

The housing (25) and its wall (26) can be adjustable. An adjusting device (40) can be provided for this purpose. With the adjusting device (40), the lower walls (31) can be mounted on the respective side wall (28, 29) in a height-adjustable manner, e.g. by means of screw connections with slotted holes. The height and the height difference (h) of the lower walls (31) on the wall sections (32, 33) can be adjusted differently via the adjusting device (40) to form the under-grip and the over-grip.

Figure 5 to 8 show the different altitudes. The lower walls (31) and the difference in height (h) can be adapted to the respective laying belt (10), in particular to its thickness. The setting and adjustment can be made in such a way that the bottom walls (31) on the first wall section (32) rest on the underside of the laying belt (10) and the bottom walls (31) on the following wall section (33) rest on the top side of the laying belt (10). .

From a procedural point of view, in a web layer (1) a moving pile web is fed on a laying belt (10) to an upper, movable main carriage (13), in particular an upper carriage, in the web direction (7), with the side surfaces (4 ) the on The pile web (2) located on the laying belt (10) is covered and shielded against external environmental influences, in particular air currents. This is done by means of a housing (25) of a shielding device (3).

Said pile web (2) is preferably covered on all of its free surfaces (4, 5) and shielded against external environmental influences, in particular air currents. In one embodiment, the pile web (2) located on the laying belt (10) is covered by the housing (25) without physical contact and with the formation of a distance. The spacer can be present on all sides of the pile (2).

The housing (25) can have a C-shape in cross-section and can be tightly connected to the laying belt (10) on the underside, the flor web (2) being arranged in the slit-like opening (49) of the C-shape and connected to the laying belt ( 2) when the upper main carriage (13) moves with respect to the housing (25), it is unrolled or rolled on.

Modifications to the embodiments shown and described are possible in various ways. The fleece layer can be designed as a longitudinal layer, in particular as a carriage layer, in which the main carriages arranged one above the other move along the discharge direction of the discharge belt. In the case of a carriage layer, the laying tapes can each be individually assigned to a carriage. The wall of the housing (25) can be formed at least partially by a wall of the fleece layer (1).

Otherwise, the features of the exemplary embodiments described above and their modifications can be combined with one another in different ways within the scope of the claims and, if necessary, interchanged.

REFERENCE LIST

1

Fleece layer, cross layer

2

pile web

3

shielding device

4

side face

5

top

6

bottom

7

web direction

8th

machine frame

9

end area

10

Laying belt, infeed belt

11

Laying tape, counter tape

12

Feeding device, feeding belt

13

Main carriage, upper carriage

14

Main carriage, laying carriage

15

Auxiliary wagon, tension wagon

16

Auxiliary wagon, tension wagon

17

carriage guidance

18

drive device

19

Deflection means, deflection pulley

20

tape loop

21

support means, support roller

22

entry point

23

discharge belt

24

fleece

25

enclosure

26

wall

27

inner space

28

Side wall

29

Side wall

30

roof wall

31

lower wall

32

wall section

33

wall section

34

topping

35

angle profile

36

carrying device

37

shoring

38

support arm

39

Support arm for support roller

40

adjusting device

41

final position removed

42

final position nearest

43

feeding direction

44

discharge direction

45

pressure roller

46

subarea

47

subarea

48

transition point

49

free space, slit

H

height difference

Claims (15)

1. Shielding installation for a moving carded web (2) in a non-woven plaiter (1), in particular crosslapper, wherein the carded web (2) has a lower side (6), an upper side (7) and, situated on the longitudinal peripheries thereof, lateral faces (4) and, with the lower side (6) lying on a laying belt (10) of the non-woven plaiter (1), is fed in the web direction (7) to an upper displaceable main carriage (13), in particular an upper carriage, characterized in that the shielding installation (3) has a housing (25) which is configured and able to be disposed in the non-woven plaiter (1) in such a manner that said housing (25) covers the lateral faces (4) of the carded web (2) that extend along the web direction (7), said carded web (2) being situated on the laying belt (10) and fed to the upper displaceable main carriage (13), and said housing (25) shields said lateral faces (4) in relation to external environmental influences, in particular air currents.
2. Shielding installation according to Claim 1, characterized in that the housing (25) has a wall (26) which is impermeable to external environmental influences, in particular air currents, and has upright and elongate lateral walls (28, 29), and a lower wall (31) that adjoins each of the lateral walls (28, 29) and can laterally overlap the laying belt (10), in particular the longitudinal peripheries thereof.
3. Shielding installation according to one of the preceding claims, characterized in that the housing (25) is configured in the manner of a box and in the cross section is substantially C-shaped.
4. Shielding installation according to Claim 2 or 3, characterized in that the housing (25) in the longitudinal direction is sub-divided into sub-regions (46, 47) which are disposed in succession, wherein dissimilar wall portions (32, 33) of the lower wall (31) are configured on the sub-regions (46, 47), wherein the wall portions (32, 33) have dissimilar height levels, and the housing (25) in a first sub-region (46) can engage below the laying belt (10), and in another subsequent sub-region (47) can engage above said laying belt (10).
5. Shielding installation according to Claim 4, characterized in that a support means (21), in particular a rotatable support roller, for the laying belt (10) guiding the carded web is disposed at a transition point (48) between the sub-regions (46, 47).
6. Shielding installation according to one of the preceding claims, characterized in that the housing (25) has a carrier installation (36) which is configured for a stationary disposal of the housing (25) in the non-woven plaiter (1).
7. Shielding installation according to one of the preceding claims, characterized in that the housing (25) in terms of the dimensions thereof, in particular in terms of height, is configured so as to be adjustable.
8. Non-woven plaiter, in particular crosslapper, having a plurality of, in particular two, main carriages (13, 14), and having at least one laying belt (10, 11) that is guided and continuously driven by way of the one upper main carriage (13), in particular upper carriage, wherein a carded web (2) on a laying belt (10) is fed in the web direction (7) to the displaceable main carriage (13), in particular upper carriage, wherein the carded web (2) has a lower side (6), an upper side (7), and situated on the longitudinal peripheries thereof, lateral faces (4), and with the lower side (6) lies on the laying belt (10), wherein the main carriages (13, 14) are displaceable above a discharge belt (23) and deposit the carded web (2) onto the discharge belt (23) while forming a single-ply or multi-ply non-woven material (24), and wherein the non-woven plaiter (1) has a shielding installation (3) for the moving carded web (2) on the laying belt (10), characterized in that the shielding installation (3) is configured according to one of Claims 1 to 7 and covers the lateral faces (4) of the carded web (2) that extend along the web direction (7), said carded web (2) being situated on the laying belt (10) and fed to the upper displaceable main carriage (13), and said shielding installation (3) shields said lateral faces (4) in relation to external environmental influences, in particular air currents.
9. Non-woven plaiter according to Claim 8, characterized in that the housing (25) in the non-woven plaiter (1) extends from an infeed-proximal end region (9) of the non-woven plaiter (1) to an upper main carriage (13), in particular upper carriage, and optionally beyond the latter.
10. Non-woven plaiter according to Claim 8 or 9, characterized in that the housing (25) in the longitudinal direction is sub-divided into sub-regions (46, 47), wherein the housing (25), when viewed in the web direction (7), in a first sub-region (46) engages below the laying belt (10), in particular the longitudinal peripheries thereof, and in another sub-region (47) engages above the laying belt (10), in particular the longitudinal peripheries thereof, and herein covers the lateral faces (4) of the carded web (2) situated on the laying belt (10).
11. Non-woven plaiter according to Claim 8, 9 or 10, characterized in that a transition point (48) between the sub-regions (46, 47) is disposed in the region of a closest infeed-proximal terminal position (42) of the travel path of the one main carriage (13), in particular upper carriage.
12. Non-woven plaiter according to Claim 10 or 11, characterized in that the sub-region (46) in which the housing (25) engages below the laying belt (10) is disposed in a region outside the travel path of the upper main carriage (13), in particular upper carriage, and the sub-region (47) in which the housing (25) engages above the laying belt (10) is disposed in a region within the travel path of the upper main carriage (13), in particular upper carriage.
13. Non-woven plaiter according to one of Claims 8 to 12, characterized in that the non-woven plaiter (1) has one or a plurality of displaceable auxiliary carriages (15, 16), in particular tensioning carriages for a belt loop (20) of a laying belt (10, 11), which are coupled to a main carriage (13, 14), wherein one auxiliary carriage (15) having a belt loop (20) is disposed and displaceable above the shielding installation (3), and/or one auxiliary carriage (16) having a belt loop (20) is disposed and displaceable below the shielding installation (3).
14. Method for shielding a moving carded web (2) in a non-woven plaiter (1), in particular crosslapper, wherein the carded web (2) on a laying belt (10) of the non-woven plaiter (1) is fed in the web direction (7) to an upper displaceable main carriage (13), in particular an upper carriage, wherein the carded web (2) has a lower side (6), an upper side (7) and, situated on the longitudinal peripheries thereof, lateral faces (4), and with the lower side (6) lies on the laying belt (10), characterized in that the lateral faces (4) on the longitudinal peripheries of the carded web (2) that extend along the web direction (7), said carded web (2) being situated on the laying belt (10) and fed to the upper displaceable main carriage (13), are covered by a housing (25) and shielded in relation to external environmental influences, in particular air currents.
15. Method according to Claim 14, characterized in that the housing (25) interacts with the laying belt (10) and engages with the laying belt (10), in particular with the lateral longitudinal peripheries thereof, in a manner overlapping transversely to the web direction (7) and herein preferably in a sealing manner, wherein the housing (25) in the web direction (7) is sub-divided into sub-regions (46, 47), wherein the laying belt (10), in particular the longitudinal peripheries thereof, in a sub-region (46) is engaged by the housing (25) from below, and in another sub-region (47) is engaged by the housing (25) from above, wherein the lateral faces (4) of the carded web (2) situated on the laying belt (10) are covered, and wherein a transition point (48) between the sub-regions (46, 47) is disposed in the region of a closest infeed-proximal terminal position (42) of the travel path of the one main carriage (13), in particular upper carriage.

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