CN220777391U - Transverse cutter incision subassembly and have its fixed length shredding equipment - Google Patents

Abstract

The application provides a transection sword incision subassembly and have its fixed length shredding equipment, wherein, transection sword incision subassembly includes: a transverse knife roller structure, a matching roller structure and a sheet-stripping roller structure. The transverse knife roller structure comprises a transverse knife roller and a plurality of blades arranged on the outer side of the circumference of the transverse knife roller. The transverse knife roller structure is matched with the matching roller structure, and the central shaft of the matching roller structure is arranged in parallel with the central shaft of the transverse knife roller structure. The strip roller structure and the transverse cutter roller structure have a gap with a preset distance, the central axis of the strip roller structure is parallel to the central axis of the transverse cutter roller structure, and the outer surface of the strip roller structure is provided with a negative pressure adsorption hole. The problem that the sheet winding roller and the tobacco sheet can not smoothly enter the next cutter group to form blocking materials is effectively solved, and the problem that the reliability is not high when the sheet clamped on the cutter blade breaks away from in the prior art is easily caused.

Description

Transverse cutter incision subassembly and have its fixed length shredding equipment

Technical Field

The application relates to the technical field of tobacco sheet shredding assemblies, in particular to a transverse cutter cutting assembly and a fixed-length shredding device with the same.

Background

In the field of reconstituted tobacco sheets, traditional tobacco sheets or novel tobacco sheets produced based on a rolling method are cut into cut tobacco according to process requirements after the sheets are dried and formed, and the continuity of the subsequent process is affected by the fact that the tobacco sheets are blocked on a cutting edge and cannot fall off normally when a transverse cutting knife is used for transverse cutting by the existing fixed-length tobacco cutter.

In the prior art, tobacco sheets normally fall off from the cutting edge in a compressed air blowing mode, but the control requirement of the mode on the angle of the nozzle and the pressure intensity of compressed air is higher, the effective sheet stripping cannot be realized due to small compressed air pressure, and the tobacco sheets cannot smoothly enter the next cutter set to form blocking materials due to the fact that the compressed air pressure is high.

Disclosure of Invention

One technical problem to be solved by the present application is: in the prior art, when a sheet clamped on a blade breaks away, the reliability is low, the sheet is easy to wind on a transverse cutter roller, and a tobacco sheet cannot smoothly enter the next cutter group to form a blocking material.

The application provides a transection knife incision assembly comprising: a transverse knife roller structure, a matching roller structure and a sheet-stripping roller structure. The transverse knife roller structure comprises a transverse knife roller and a plurality of blades arranged on the outer side of the circumference of the transverse knife roller. The transverse knife roller structure is matched with the matching roller structure, and the central shaft of the matching roller structure is arranged in parallel with the central shaft of the transverse knife roller structure. The strip roller structure and the transverse cutter roller structure have a gap with a preset distance, the central axis of the strip roller structure is parallel to the central axis of the transverse cutter roller structure, and the outer surface of the strip roller structure is provided with a negative pressure adsorption hole.

In some embodiments, the stripping roller structure comprises a hollow shaft and a stripping roller, the stripping roller is rotatably sleeved on the circumferential outer side of the hollow shaft, the hollow shaft is provided with a through hole, a negative pressure channel is arranged between the hollow shaft and the stripping roller, and the negative pressure adsorption hole is communicated with the central hole of the hollow shaft sequentially through the negative pressure channel and the through hole.

In some embodiments, the inner wall of the flaker roll is provided with a plurality of buffer grooves extending along the axial direction of the flaker roll, the through holes are communicated with the buffer grooves, and the negative pressure adsorption holes are positioned at the bottoms of the buffer grooves.

In some embodiments, the negative pressure adsorption holes are multiple, each buffer groove corresponds to multiple rows of negative pressure adsorption holes, and each row of negative pressure adsorption holes is multiple arranged at intervals along the axial direction of the stripping roller.

In some embodiments, the via is oriented toward the cross-cutter roll structure, and the included angle of the central axis of the cross-cutter roll structure is between-70 ° and 50 °.

In some embodiments, one end of the stripper roll is provided with a powered mating portion.

In some embodiments, a sealing structure is disposed between the stripping roller and the hollow shaft, the sealing structure is located at a circumferential outer side of the via hole, and the via hole is communicated with the buffer groove through a channel disposed by the sealing structure.

In some embodiments, the stripper roll structure further comprises a stripper roll drive motor, the stripper roll drive motor being a counter-rotating motor.

In some embodiments, the predetermined distance is between 3mm and 35 mm.

According to another aspect of the present application, there is also provided a fixed length cutting apparatus including a cross cutter wire assembly and a slitter wire assembly mated with the cross cutter wire assembly.

Through above-mentioned technical scheme, the utility model provides a transection sword incision subassembly, transection knife roll structure includes transection knife roll and sets up a plurality of blades in transection knife roll's circumference outside. The transverse knife roller drives a plurality of blades on the transverse knife roller to cut tobacco sheets when rotating, the transverse knife roller structure is matched with the matched roller structure, the central shaft of the matched roller structure is parallel to the central shaft of the transverse knife roller structure, so that the transverse knife roller structure and the matched roller structure are matched with each other to apply force uniformly when cutting the tobacco sheets, the clearance between the transverse knife roller structure and the strip roller structure is a preset distance, the preset distance can be regulated and controlled according to the quantity of the cut tobacco when strip stripping so as to achieve the optimal strip stripping effect, the central shaft of the strip roller structure is parallel to the central shaft of the transverse knife roller structure, strip stripping operation is conveniently carried out on the position parallel to the transverse knife roller structure, strip stripping is uniform and difficult to occur, the strip stripping rate is effectively improved, the outer surface of the strip roller structure is provided with negative pressure adsorption holes for effectively stripping cut tobacco clamped between blades, the strip stripping difficulty is reduced, and the strip stripping mode is difficult to cause deviation of the sheet. The technical scheme of the application effectively solves the problems that in the prior art, when a slice clamped on a blade breaks away, reliability is low, a slice winding roller is easy to cause, and the slice cannot smoothly enter the next knife group to form blocking.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic structural view of a transection knife incision assembly according to an embodiment of the present application;

FIG. 2 illustrates a schematic mating diagram of a cross-cut knife roll configuration and a mating roll configuration in accordance with an embodiment of the present application;

FIG. 3 shows a schematic view of a debonding roller configuration of a cross knife slitting assembly according to an embodiment of the present application;

FIG. 4 shows a schematic view of a cross cut knife roll configuration in accordance with an embodiment of the present application;

FIG. 5 shows a schematic cross-sectional view of a stripper roll configuration in accordance with an embodiment of the present application;

fig. 6 shows a schematic cross-sectional view of another angle of a stripper roll configuration in accordance with an embodiment of the present application.

Reference numerals illustrate:

10. a cross cutter roller structure; 11. a transverse cutter roller; 12. a blade; 20. a mating roll structure; 30. a flaking roller structure; 31. a negative pressure adsorption hole; 32. a hollow shaft; 33. and (5) a sheet-stripping roller.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and not to limit the scope of the application, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.

These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

In the description of the present application, unless otherwise indicated, the meaning of "plurality" is greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

Furthermore, the terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.

It should also be noted that, in the description of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.

All terms used herein have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

As shown in fig. 1 to 6, the transecting knife cutting assembly of the present embodiment includes: a cross cutter roll structure 10, a mating roll structure 20, and a stripper roll structure 30. The crosscut knife roll structure 10 includes a crosscut knife roll 11 and a plurality of blades disposed circumferentially outward of the crosscut knife roll 11. The transverse knife roll structure 10 is matched with the matching roll structure 20, and the central axis of the matching roll structure 20 is parallel to the central axis of the transverse knife roll structure 10. The stripper roll structure 30 has a gap of a predetermined distance from the transverse cutter roll structure 10, the central axis of the stripper roll structure 30 is parallel to the central axis of the transverse cutter roll structure 10, and the outer surface of the stripper roll structure 30 has negative pressure suction holes 31.

By applying the technical scheme of the present embodiment, the transverse cutter roller structure 10 includes a transverse cutter roller 11 and a plurality of blades 12 disposed on the circumferential outer side of the transverse cutter roller. The transverse knife roller 11 drives a plurality of blades 12 on the transverse knife roller 11 to cut tobacco sheets when rotating, the transverse knife roller structure 10 is matched with the matched roller structure 20, the central shaft of the matched roller structure 20 is parallel to the central shaft of the transverse knife roller structure 10, so that the transverse knife roller structure 10 and the matched roller structure 20 are matched with each other, acting force is uniform when cutting the tobacco sheets, the clearance between the stripping roller structure 30 and the transverse knife roller structure 10 is provided with a preset distance, the preset distance can be regulated and controlled according to the quantity of cut tobacco when stripping, so that the optimal stripping effect is achieved, the central shaft of the stripping roller structure 30 is parallel to the central shaft of the transverse knife roller structure 10, stripping operation is convenient to carry out on the position parallel to the transverse knife roller structure 10, stripping is uniform and difficult to occur, the stripping rate is effectively improved, the outer surface of the stripping roller structure 30 is provided with negative pressure adsorption holes for effectively stripping cut tobacco clamped between blades, the stripping difficulty is reduced, and the stripping mode is difficult to cause flying cut tobacco. The technical scheme of the embodiment effectively solves the problems that in the prior art, when cut tobacco clamped on the blade is separated, reliability is low, sheet winding rollers are easy to cause, and the tobacco sheet cannot smoothly enter the next cutter group to form blocking materials.

It should be noted that, the blades 12 in each row are uniformly arranged on the transverse cutter roller 11, the arrangement modes of the odd rows are consistent, the arrangement modes of the even rows are consistent, and the blades 12 in the odd rows are located at the middle positions of the even rows corresponding to the adjacent blades 12. The blades 12 are parallel to each other, and a certain included angle is formed between the blades 12 and the central axis of the transverse cutter roller 11. The transverse cutter roller structure 10 and the matching roller structure 20 are matched to cut the tobacco sheets according to the arrangement of the blades, and the transversely cut sheets are not completely broken and still integrally move forwards.

As shown in fig. 5 and 6, in the technical solution of the embodiment, the stripping roller structure 30 includes a hollow shaft 32 and a stripping roller 33, the stripping roller 33 is rotatably sleeved on the circumferential outer side of the hollow shaft 32, the hollow shaft 32 has a via hole, a negative pressure channel is provided between the hollow shaft 32 and the stripping roller 33, and the negative pressure adsorption hole 31 is sequentially communicated with the central hole of the hollow shaft 32 through the negative pressure channel and the via hole. The stripping roller 33 is rotatably sleeved on the circumferential outer side of the hollow shaft 32 to strip (separate from the blade) tobacco shreds clamped in the blade, the hollow shaft 32 is provided with a through hole, a negative pressure channel is arranged between the hollow shaft 32 and the stripping roller 33, the negative pressure can be controlled by air pressure to maintain the state of negative pressure, the tobacco shreds are stripped by the negative pressure action, and the negative pressure adsorption hole 31 is communicated with the central hole of the hollow shaft 32 sequentially through the negative pressure channel and the through hole. The moving path of the air in the stripping roller structure 30 is shown in the form of an arrow, the air firstly enters the negative pressure channel through the negative pressure adsorption hole 31, then passes through the through hole and the center hole of the hollow shaft 32, and the air is pumped out along one end of the opening of the hollow shaft 32 due to the fact that one end of the hollow shaft 32 is opened and one end of the hollow shaft is closed, and the tobacco shreds are adsorbed on the negative pressure adsorption hole 31 through the negative pressure effect. The radius of the negative pressure adsorption hole 31 gradually decreases along the air flow direction, so that the negative pressure intensity is too high to suck the cut tobacco into the negative pressure adsorption hole 31 to adversely affect the inside of the stripping roller structure 30.

It should be noted that, the negative pressure adsorption holes 31 are all formed on the circumferential outer surface of the stripping roller 33, the length of the negative pressure adsorption holes 31 is slightly longer than that of the blades 12, so that effective stripping operation can be ensured for all the blades 12, the positions of the negative pressure adsorption holes 31 formed on the circumferential outer surface of the stripping roller 33 corresponding to the through holes and the center holes are called adsorption positions, the negative pressure adsorption holes 31 corresponding to the through holes and the center holes are called adsorption positions, adsorption is not carried out, the stripping roller 33 rotates the hollow shaft 32 during stripping, so that the operation of adsorbing the cut tobacco can be carried out through the negative pressure effect in the rotation process, the adsorption positions and the adsorption positions can be continuously replaced, the adsorption operation can be continuously carried out, and meanwhile, the cut tobacco sucked out after the adsorption positions are converted into the adsorption positions can drop into the conveying belt for subsequent operation after the short rotation of the cut tobacco stripping roller 33 due to the fact that the adsorption effect is not carried out, the arrangement mode can not only effectively carry out stripping treatment, but also can be used for conveying the cut tobacco into the conveying belt after the cut tobacco, and the waste of the cut tobacco can be greatly avoided.

In the technical solution of the embodiment, the inner wall of the flaking roller 33 is provided with a plurality of buffer grooves extending along the axial direction of the flaking roller 33, the via holes are communicated with the buffer grooves, and the negative pressure adsorption holes 31 are positioned at the bottom of the buffer grooves. The inner wall of the flaking roller 33 is provided with a plurality of buffer grooves extending along the axial direction of the flaking roller 33 and can play a role in buffering during flaking operation, so that the negative pressure adsorption holes 31 and the blades 12 are prevented from being offset to influence flaking effect due to larger vibration amplitude after the flaking roller adsorbs cut tobacco, the through holes are communicated with the buffer grooves, the negative pressure adsorption holes 31 are positioned at the bottoms of the buffer grooves, the buffer grooves are part of negative pressure channels, the negative pressure intensity can be regulated and controlled by regulating and controlling the proportion of the negative pressure adsorption holes 31 to the buffer grooves, the buffer grooves are arranged at positions convenient for positioning adsorption, the through holes are communicated with the buffer grooves, and the negative pressure adsorption holes 31 are positioned at the bottoms of the buffer grooves, so that the negative pressure uniformly enhances the adsorption effect.

As shown in fig. 3, in the technical solution of the embodiment, the negative pressure suction holes 31 are plural, each buffer groove corresponds to plural rows of negative pressure suction holes 31, and each row of negative pressure suction holes 31 is plural and is disposed at intervals along the axial direction of the flaking roller 33. The negative pressure absorption holes 31 are multiple, each buffer groove corresponds to multiple rows of negative pressure absorption holes 31, the negative pressure absorption holes 31 can maintain the negative pressure environment of the buffer grooves when working, the setting of the buffer grooves can strengthen the negative pressure effect and can also play a certain bearing role on absorbed sheets so as to facilitate the subsequent falling back to the conveyor belt, and each row of negative pressure absorption holes 31 are multiple negative pressures which are arranged at intervals along the axial direction of the stripping roller 33 and can provide proper strength.

As shown in fig. 5 and fig. 6, in the technical solution of the embodiment, the via hole faces the cross cutter roller structure 10, and the included angle of the central axis of the cross cutter roller structure 10 in the horizontal plane is between-70 ° and 50 °. The position of the through hole corresponding to the stripping roller 33 is an adsorption position, the through hole can adsorb tobacco shreds clamped on the transverse cutter roller structure 10 towards the adsorption position of the transverse cutter roller structure 10, the included angle of the central axis of the transverse cutter roller structure 10 in the horizontal plane is between-70 degrees and 50 degrees, and at the moment, the negative pressure intensity provided by the through hole can be in a proper range, so that the through hole can have good adsorption effect on the tobacco shreds and can not generate displacement influence on the cutter 12.

In the technical solution of the embodiment, one end of the flaking roller 33 is provided with a power fitting portion. The power matching part can regulate and control the rotation of the stripping roller 33 so that the rotation speed of the stripping roller is matched with the transverse cutter roller structure 10 to maintain good stripping effect.

As shown in fig. 5 and 6, in the technical solution of the embodiment, a sealing structure is disposed between the stripping roller 33 and the hollow shaft 32, the sealing structure is located at the circumferential outer side of the via hole, and the via hole is communicated with the buffer groove through a channel disposed by the sealing structure. Be provided with seal structure between flaking roller 33 and hollow shaft 32, seal structure passes the negative pressure passageway, seal structure is located the circumference outside of via hole, the via hole is linked together with the buffer groove through the passageway that seal structure set up, the centre bore, the via hole, negative pressure passageway and negative pressure absorption hole 31 have formed the negative pressure passageway and have made the provision of negative pressure can be more stable, rapidly when carrying out the flaking operation, make the tiny matter that exists in the pipe tobacco when carrying out the flaking operation can be separated by seal structure when preventing that negative pressure gas from leaking, prevent to get into hollow shaft 32 and flaking roller 33 matched with inside to cause the result that flaking roller 33 rotational speed unstability influences the flaking, still be provided with the bearing between flaking roller 33 and the hollow shaft 32, play the effect of reducing friction.

As shown in fig. 3, in the technical solution of the embodiment, the film-removing roller structure 30 further includes a film-removing roller driving motor, where the film-removing roller driving motor is a forward and reverse rotation motor. The stripper roller driving motor is a forward and reverse rotation motor, and can drive the stripper roller 33 to forward and reverse rotation to adapt to different working demands and improve the stripping efficiency, and the forward rotation and reverse rotation can make the time of falling the tobacco shred absorbed by the stripper roller structure 30 to the conveyor belt different so as to match with the subsequent working demands to have more flexibility.

In the technical solution of the embodiment, the predetermined distance is between 3mm and 35 mm. The shortest perpendicular distance between the excircle of the sheet-stripping roller structure 30 and the excircle of the transverse cutter roller structure 10 is a preset distance, the preset distance is between 3mm and 35mm, the preset distance can be adjusted to achieve the optimal sheet-stripping effect according to the amount of cut tobacco, the preset distance can be 10mm when sheet-stripping operation is carried out, the top of the transverse cutter roller structure 10 is provided with a pressing structure, the pressing structure comprises two pressing wheels, the two pressing wheels are positioned at two ends of the transverse cutter roller structure 10, the pressing wheels are pressed on one side, away from the matched roller structure 20, of the transverse cutter roller structure 10, the pressing structure can carry out pressure adjustment on the blades 12 of the transverse cutter roller structure 10, vibration of the transverse cutter roller structure 10 during cutting is reduced, and the stability of transverse cutting is improved.

As shown in fig. 4, the blade 12 arrangement of the cross cutter roll structure 10 has the following data: a is the circumference of the rod surface of the transverse cutter roller 11; b is the effective width of the transverse cutting knife roll, which is about 60mm wider than the width of the material; c is the shredding length of the process; d is the circumferential spacing of the adjacent blades 12 in the odd columns and the even columns; e is the incision width, about 60 mm; f is the included angle between the blade 12 and the axis of the transverse cutter roller 11, and the included angle is 1-2 degrees.

The application also provides a longitudinal cutting knife wire assembly, and the fixed-length shredding equipment comprises a transverse cutting knife wire assembly and the longitudinal cutting knife wire assembly matched with the transverse cutting knife wire assembly. The longitudinal cutter wire assembly can longitudinally cut the cut tobacco obtained after being cut by the transverse cutter wire assembly, so that the length and the width of the cut tobacco can meet the requirements.

As will be appreciated from the foregoing, the transection knife set (transection knife and incision assembly): the cutter comprises a transverse cutter roller 11, a cutter pillow (a matched roller structure 20), a supporting plate, a connecting plate, a pinch roller, a gear, a chain wheel, a bearing and the like. The surface of the transverse cutter roller 11 is provided with a plurality of blades (blades 12) which are arranged in a staggered way, and the blades of each row are uniformly arranged on the circumference; cutting edges on the roll surface of the transverse cutter roll 11, wherein the latter row is the extension of the former row on the spiral line; the spacing between adjacent blades of the odd columns and the even columns is 1/2 of the length of the shredding process; the transverse cutter roller 11 cooperates with the cutter pillow to cut the sheet (tobacco sheet) according to the arranged cut arrangement. The transversely-cut sheet is not completely broken, and can move forward integrally; the matched roller (can be a cutter pillow or a smooth roller) is a smooth roller, and is similar to a chopping board in function, and the matched transverse cutter roller 11 is matched for completing transverse cutting; flaker roll (flaker roll structure 30): the flaking roller is provided with an adsorption area (adsorption position) and a shedding area (non-adsorption position), after being connected with the negative pressure fan, the adsorption area can generate suction force to adsorb the flake clamped on the blade on the roller, the suction force disappears after the flake rotates for a certain angle to the shedding area, and the flake is separated from the flaking roller.

Thus, various embodiments of the present application have been described in detail. In order to avoid obscuring the concepts of the present application, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims (10)

1. A transecting knife cut assembly comprising:

a cross cutter roller structure (10), wherein the cross cutter roller structure (10) comprises a cross cutter roller (11) and a plurality of blades (12) arranged on the circumferential outer side of the cross cutter roller (11);

the transverse knife roll structure (10) is matched with the matching roll structure (20), and the central axis of the matching roll structure (20) is parallel to the central axis of the transverse knife roll structure (10);

the sheet removing roller structure (30), the sheet removing roller structure (30) and the transverse cutting knife roller structure (10) have a gap with a preset distance, the central axis of the sheet removing roller structure (30) is parallel to the central axis of the transverse cutting knife roller structure (10), and the outer surface of the sheet removing roller structure (30) is provided with a negative pressure adsorption hole (31).

2. The crosscut knife cutting assembly according to claim 1, wherein the flaking roller structure (30) comprises a hollow shaft (32) and a flaking roller (33), the flaking roller (33) is rotatably sleeved on the circumferential outer side of the hollow shaft (32), the hollow shaft (32) is provided with a through hole, a negative pressure channel is arranged between the hollow shaft (32) and the flaking roller (33), and the negative pressure adsorption hole (31) is communicated with a central hole of the hollow shaft (32) sequentially through the negative pressure channel and the through hole.

3. The crossknife cutting assembly according to claim 2, wherein the inner wall of the flaking roll (33) is provided with a plurality of buffer grooves extending in the axial direction of the flaking roll (33), the through holes are communicated with the buffer grooves, and the negative pressure adsorption holes (31) are positioned at the bottoms of the buffer grooves.

4. A crosscut knife cutting assembly according to claim 3, wherein the negative pressure suction holes (31) are plural, each of the buffer grooves corresponds to plural rows of the negative pressure suction holes (31), and each row of the negative pressure suction holes (31) is plural arranged at intervals along the axial direction of the flaking roller (33).

5. The crossknife incision assembly according to claim 2, characterized in that the via is directed towards the crossknife roll structure (10), the via being located at a level at which the central axis of the crossknife roll structure (10) is located at an angle between-70 ° and 50 °.

6. A crossknife cutting assembly according to claim 3, characterised in that one end of the stripper roll (33) is provided with a power fit.

7. The crossknife cutting assembly according to claim 6, wherein a sealing structure is provided between the stripper roll (33) and the hollow shaft (32), the sealing structure being located circumferentially outside the via hole, the via hole being in communication with the buffer groove via a channel provided by the sealing structure.

8. The crossknife cutting assembly as claimed in claim 6 wherein the stripper roll structure (30) further comprises a stripper roll drive motor, the stripper roll drive motor being a counter-rotating motor.

9. The transecting knife cut assembly of claim 1, wherein the predetermined distance is between 3mm and 35 mm.

10. A fixed length cutting apparatus comprising a cross cut wire assembly and a slitter wire assembly mated with the cross cut wire assembly, the cross cut wire assembly being the cross cut wire assembly of any one of claims 1 to 9.