EP1065313A2 - Device for separating and threading a web tail - Google Patents

Abstract

The appts. (10) to cut a leader strip (12) at a web of paper or cardboard, for feeding into papermaking or paper finishing machine stages, has a cutter (16) and a transfer unit (18) to carry it to a following machine stage. The cutter (16) and transfer unit (18) are pref. mounted to a common plate (22). Before cutting, the leader strip (12) is passed to the plate (22), to be tensed for cutting, with the transfer unit (18) in front of the cutter (16) in the direction (L) of material travel. The plate (22) is mounted at a scraper beam (24). The transfer unit is an air transfer unit (18). Before cutting, the leader strip (12) is stabilized by a blown air stream at the side of the plate (22) towards the leader strip (12), at a tangent. An air guide plate (30) is after the cutter (16), in the direction (L) of travel, to apply tension to the leader strip (12), at the side of the plate (22) towards the leader (12). The air guide plate (30) is pitched at an angle to the plate (22) surface so that the leader (12) is lifted from the plate (22) surface to pass through the cutting zone of the cutter (16). At least two air guide plates (30) can be fitted, in succession on the direction (L) of paper travel. The air transfer unit (18) has a number of blowing jets, with adjustment movement. It can have a blowing tube, with a row of blower jets parallel to the tube axis, with at least some which can be adjusted, and the blowing tube can be set by rotation around its axis. Adjustable jets at the air transfer system can be used to stabilize and/or tense the leader (12). The cutter (16) gives a shear cut and/or a parallel cut. The cutter (16) has at least two cutting blades, with a setting screw adjustment at two frame sections which swing in relation to each other. The cutting blades are smooth or they can be perforated and/or toothed.

Description

The invention relates to a device for separating and transferring a into a machine for producing and / or treating a material web, in particular paper or cardboard web, insertion strip to be threaded, with a separating device and a transfer device, which is used to separate the lead strip after separation subsequent machine setup.

Such a device can serve, for example, a paper web to thread into a paper machine. Because of the large web width it is usually not possible to use the full width of the paper web introduce. An insertion strip is therefore cut off from the web, which is threaded into the paper machine and then the full width of the paper web. The threading process takes place when starting up the paper machine or after a web break. The The device in question can be practically anywhere on the paper machine are used, e.g. at the end of the dryer section or between a smoothing unit and a winding device.

In a device known from DE 44 09 660 A1 of the beginning the type mentioned is separated by the fact that a Guide plate pivotally mounted on a scraper beam with its free Swung past the end of a separating edge of another baffle becomes. The strips are separated between two baffles, from which at least one must be pivotally mounted.

In a further separating and known from DE 39 24 897 A1 Transfer device is the insertion strip in one between two Baffles formed channel using a water jet cutter severed. In this case too, at least one of the two guide plates is swiveling again.

In a separating and transfer device described in US 4,923,567 the insertion strip is made using an air or water jet cutter severed. The insertion strip then becomes one baffle arranged in the strip running direction in front of the separating device deflected, tangential to the continuation of the path along this sheet is acted upon by an air stream.

This takes place in a separating device known from EP 0 554 339 B1 Strip separation by two counter rotating knives. This rotating one The insertion strip is cut again by a swiveling one Baffle supplied. The separating device comprising the rotating knives can be swiveled into the area of a vacuum belt through which the insertion strip is transported further after the separation process becomes. After a respective separation process, the separation device becomes again pivoted away from the vacuum belt.

The aim of the invention is to provide a device of the type mentioned create that is not only inexpensive to produce, but also one has a relatively compact structure and in particular also without problems, for example can be integrated into an existing dryer section can. In addition, it should be as simple as possible for both Conversions as well as new systems can be used.

This object is achieved according to the invention in that the separating device and the transfer device preferably on a common one Plate are attached to the insertion strip before separating guided and biased for the separation process, and that the transfer device arranged in the direction of strip travel (L) before the separating device is.

Due to this design, there is a for the entire device overall extremely simple and compact structure. The device is not only can it be manufactured inexpensively, it can in particular be easily can also be integrated into an existing dryer section. With the solution according to the invention is also in terms of possible applications achieved greater flexibility. Such is the device according to the invention Can be used without any problems both for conversions and new systems.

The plate is preferably securely attachable to a doctor bar. On Swiveling the plate is no longer necessary.

In a preferred practical embodiment of the invention The device is the transfer device through an air transfer device educated.

To stabilize the insertion strip before the separation process, the at least essentially the side of the plate facing the insertion strip can be charged tangentially with a corresponding blown air flow his.

In an expedient practical embodiment is for prestressing of the insertion strip in the direction of strip travel behind the separating device at least one air baffle on the one facing the insertion strip Side of the plate provided. The air baffle is related to the preferably inclined plate surface facing the insertion strip, that the insertion strip is lifted off this plate surface and is accordingly led through the separation area of the separation device. This ensures that the insertion strip is then reliable can be separated. At least two are expediently in Strip running direction provided baffles.

In an expedient practical embodiment, the as Air transfer device provided transfer device several blowing nozzles. These can be adjustable and can be moved accordingly.

It is also advantageous if the air transfer device is an air blow pipe with at least one row of parallel to the pipe axis Blowing nozzles includes. At least some of the blowing nozzles can be related of the air blow pipe to be adjustable or movable. Alternatively or additionally the air blower tube can be adjusted and about its axis be rotatable.

The one to stabilize and / or pretension the insertion strip Blown air flow required can advantageously via accordingly adjustable blowing nozzles of the air transfer device can be generated, wherein the lead-in strip should preferably be pretensioned. Basically it is however, it is also conceivable for such stabilization and prestressing to provide separate blow nozzles.

The separating device can in particular be used to carry out a scissor cut and / or a parallel cut.

In an expedient practical embodiment of the invention The separation device comprises at least two in particular knife-like separating elements, which are preferably adjustable on two frame parts movable relative to each other are attached.

In a preferred practical embodiment, the two frame parts pivotable relative to each other.

In certain cases it can be advantageous if the separating elements the separating device at least partially by smooth cutting elements are formed. In principle, these separating elements can at least partially but also through perforated and / or toothed cutting elements be educated.

Figur 1

eine schematische Darstellung der Trenneinrichtung einer Vorrichtung zum Trennen und Überführen eines aus einer Materialbahn geschnittenen Einführstreifens im geöffneten Zustand,

Figur 2

eine schematische Vorderansicht der Trenn- und Überführvorrichtung und

Figur 3

eine schematische Seitenansicht der Trenn- und Überführvorrichtung.

The invention is explained below using an exemplary embodiment with reference to the drawing; in this show:

Figure 1

1 shows a schematic representation of the separating device of a device for separating and transferring an insertion strip cut from a material web in the open state,

Figure 2

is a schematic front view of the separation and transfer device and

Figure 3

is a schematic side view of the separation and transfer device.

The device 10 shown schematically in FIGS. 2 and 3 serves the separation and transfer of a cut from a material web Lead strip 12, which is in a machine for manufacturing and / or treatment a material web is to be threaded. In the present case it is Lead strips 12 cut from a paper web and the device 10 in the discharge area of one of the dryer sections of the paper machine in question assigned drying cylinder 14 arranged (see. In particular Figure 3).

The device 10 comprises a separating device 16 (cf. in particular also Figure 1) and a transfer device, in the present case a Air transfer device 18, which serves the insertion strip 12 after separation to a subsequent installation of the paper machine to convict. In the present case, the insertion strip 12 is attached to a Rope shears 20 transferred by an inner rope 20 'and an outer one Rope 20 '' is formed, which are brought together accordingly (see FIG 1).

The separating device 16 and the air transfer device 18 are on one common rigid plate 22 attached on which the lead strip 12 performed before the separation and biased for the separation process becomes.

As can be seen from Figure 3, the plate 22 is fixed to one Scraper bar 24 attached. The scraper bar 24 also carries one as Scraper blade designated scraper 26, when starting or after a Web break serves to remove the paper web from the drying cylinder 14 to decrease. The paper web runs during normal production even before the scraper 26 from the drying cylinder 14, wherein it is fed in particular to a web guide roller or the like, to via this to a follow-up device such as a calender to be led. During the threading process, one of the both edges of the paper web, for example by means of a tip cutter, cut an insertion strip 12. This is before an operation the device 10 via the scraper 26 and the plate 22 initially led downwards.

As can best be seen from FIG. 2, the air transfer device is 18 arranged in the strip running direction L in front of the separating device 16.

To stabilize the insertion strip 12 before the separation process, the this insertion strip 12 facing side of the plate 22 at least in substantially tangentially acted upon by a corresponding blown air flow, which, for example, by correspondingly adjustable blowing nozzles 28 is generated, which in the present embodiment is in the range of Air transfer device 18 is provided and assigned to this, for example could be. Basically you can use this to generate stabilization of the lead strip 12 serving blowing air flow, however separate nozzles can also be provided.

The blow air flow in question lies against the one facing the insertion strip 12 Side of the plate 22, due to it in the strip running direction L the so-called Coanda effect follows. On the plate 22 facing The underside of the insertion strip 12 arises as a result of the air flow Vacuum, so that the lead strip 12 is applied to the plate 22 and thus optimally guided by this.

For prestressing the insertion strip 12, L is in the strip running direction behind the separating device 18 at least one air baffle 30 on the arranged the insertion strip 12 side of the plate 22. in the In the present case, two are arranged one behind the other in the strip running direction L. Air baffles 30 are provided.

The two air baffles extending transversely to the strip running direction L. 30 are with respect to the plate surface facing the insertion strip 12 so inclined that the lead strip 12 from this plate surface lifted off and accordingly through the separating area 32 (see FIG. 1) of the separating device 16. This ensures that the insertion strip 12 then reliably cuts becomes.

The air transfer device 18 comprises a plurality of blowing nozzles 28 which are adjustable in the present case and are accordingly movable. In the present embodiment, the air transfer device comprises 18 an air blow pipe 34 with at least one parallel to the Row of blowing nozzles extending pipe axis 28. At least some of the blowing nozzles 28 are adjustable with respect to the air blowing tube 34 or movable. In addition, the air blow pipe itself can be adjusted, i.e. for example be rotatable about its axis.

For a respective separation process, the air blow pipe 34 can, for example rotated and the blow nozzles 28 are aligned so that to stabilize the insertion strip 12 a parallel to the strip running direction L directed blow air flow results. After the separation process it is then possible, for example, to rotate the air blowing tube 34 and align the blow nozzles 28 so that the insertion strip 12 laterally to Cable shear 20 (see FIG. 1) is transferred.

Air is supplied to the air blowing tube 34 laterally in the direction of the arrow F. (see Figure 2).

While in the present case the stabilization and / or pretensioning of the lead strip 12 required blowing air flow, for example via correspondingly adjustable blowing nozzles 28 of the air transfer device 34 is generated, can be used for stabilization and pretensioning of the lead strip 12 also from this air transfer device 34 separate blowing nozzles can be provided.

The separating device 16 can optionally be used to perform a scissor cut and / or a parallel cut.

In the present exemplary embodiment, the separating device 16 comprises two in particular knife-like separating elements 36, 38, which are preferably adjustable on two frame parts 40, 42 that are movable relative to one another are attached (cf. in particular FIG. 1).

In the present exemplary embodiment, the two frame parts 40, 42 can be pivoted relative to one another about an axis 44. In the present In this case, the frame part 40 is fixed to the plate 22 (see also FIGS. 2 and 3) attached, while the other frame part 42 starts from the open state shown in FIG. 1 towards the frame part 40 is pivotable upwards. For this purpose, an appropriate drive such as for example at least one cylinder / piston unit or the like be provided, which can be controlled accordingly by a control, once the lead strip 12 is stabilized on the plate 22 and in the desired Way is biased.

In the present case, the two knife-like separating elements 36, 38 adjustable via adjusting screws 46, 48 and / or the like on the Frame parts 40, 42 attached.

The knife-like separating elements 36, 38 of the separating device 18 can for example by smooth cutting elements or by perforated and / or toothed cutting element can be formed.

As soon as the insertion strip 12 is stabilized and prestressed on the plate 22 , the separating device 20 can in particular via a control device be operated accordingly. Immediately after the separation process becomes the insertion strip coming from the drying cylinder 14 then transferred to the cable shears 20 by the air transfer device 18.

The result is an inexpensive to manufacture, compact in construction Separating and transfer device, which in particular also without problems an existing dryer section can be integrated. The device is the easiest way for both conversions and new systems applicable.

Reference list

10th

Separating and transfer device

12th

Insertion strips

14

Drying cylinder

16

Separator

18th

Air transfer device

20th

Rope cutter

20 '

inner rope

20 ''

outer rope

22

plate

24th

Scraper bar

26

scraper

28

Blow nozzles

30th

Air baffle

32

Separation area

34

Air blow pipe

36

Separating element

38

Separating element

40

Frame part

42

Frame part

44

Swivel axis

46

Set screws

48

Set screws

L

Strip running direction

F

arrow

Claims (19)

Device (10) for separating and transferring an insertion strip (12) to be threaded into a machine for producing and / or treating a material web, in particular paper or cardboard web, with a separating device (16) and a transfer device (18), which is used to after the separation has taken place, transfer the insertion strip (12) to a subsequent device (20) of the machine,
characterized by
that the separating device (16) and the transfer device (18) are preferably mounted on a common plate (22) on which the insertion strip (12) is guided prior to the separation and can be pretensioned for the separation process, and that the transfer device (18) is in the strip running direction (L) is arranged in front of the separating device (16). Device according to claim 1,
characterized by
that the plate (22) can be fixedly attached to a scraper bar (24). Device according to claim 1 or 2,
characterized by
that the transfer device is formed by an air transfer device (18). Device according to one of the preceding claims,
characterized by
that in order to stabilize the insertion strip (12) before the separation process, the side of the plate (22) facing the insertion strip (12) can be acted upon at least substantially tangentially with a corresponding blown air flow. Device according to one of the preceding claims,
characterized by
that at least one air baffle (30) is provided on the side of the plate (22) facing the insertion strip (12) for prestressing the insertion strip (12) in the strip running direction (L) behind the separating device (18). Device according to claim 5,
characterized by
that the air baffle (30) is inclined with respect to the plate surface facing the insertion strip (12) in such a way that the insertion strip (12) is lifted off this plate surface and is accordingly guided through the separation region (32) of the separation device (16). Apparatus according to claim 5 or 6,
characterized by
that at least two air baffles (30) arranged one behind the other in the strip running direction (L) are provided. Device according to one of the preceding claims,
characterized by
that the transfer device provided as an air transfer device (18) comprises a plurality of blowing nozzles (28). Device according to claim 8,
characterized by
that the blowing nozzles (28) are adjustable and can be moved accordingly. Device according to one of the preceding claims,
characterized by
that the air transfer device (18) comprises an air blowing tube (34) with at least one row of blowing nozzles extending parallel to the tube axis. Apparatus according to claim 10,
characterized by
that at least some of the blowing nozzles (28) are adjustable or movable with respect to the air blowing tube (34). Device according to claim 10 or 11,
characterized by
that the air blow pipe (34) is adjustable and rotatable about its axis. Device according to one of the preceding claims,
characterized by
that the blowing air flow required for stabilizing and / or prestressing the insertion strip (12) can be generated via correspondingly adjustable blowing nozzles (28) of the air transfer device (34), the insertion strip (12) preferably being prestressed. Device according to one of the preceding claims,
characterized by
that the separating device (16) is designed to carry out a scissor cut and / or a parallel cut. Device according to one of the preceding claims,
characterized by
that the separating device (16) comprises at least two in particular knife-like separating elements (36, 38) which are preferably adjustably attached to two frame parts (40, 42) which are movable relative to one another. Device according to claim 15,
characterized by
that the two frame parts (40, 42) can be pivoted relative to one another. Device according to claim 15 or 16,
characterized by
that the separating elements (36, 38) via adjusting screws (46, 48) and / or the like are adjustably attached to the frame parts (40, 42). Device according to one of the preceding claims,
characterized by
that the separating elements (36, 38) of the separating device (18) are at least partially formed by smooth cutting elements. Device according to one of the preceding claims,
characterized by
that the separating elements (36, 38) of the separating device (18) are at least partially formed by perforated and / or toothed cutting elements.

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