Paper special-shaped edge cutting device

Abstract

The invention relates to the technical field of paper edge cutting, in particular to a paper special-shaped edge cutting device. The edge cutting device comprises an abutting roller, an edge cutting roller, a rotating driving piece and a moving driving piece. The surface of the abutting roller is sleeved with a deformable first flexible sleeve. The surface of the edge cutting roller is sleeved with an edge cutting ring, the edge cutting ring comprises a plurality of edge cutting units which are sequentially arranged in the circumferential direction of the edge cutting roller, and each edge cutting unit comprises a plurality of cutting side edges; an edge cutting channel for paper to pass through is formed between the abutting roller and the edge cutting roller; the movable driving part drives the abutting roller or / and the edge cutting roller to move, so that the edge cutting ring abuts against the first flexible sleeve, and the first flexible sleeve deforms; the rotation driving part drives the edge cutting roller and the edge cutting ring to rotate so that the multiple cutting side edges can cut paper in sequence. According to the paper edge cutting device, only one linear pressure is applied to paper during cutting every time, the paper is not prone to being driven to deform, and the paper edge cutting device is suitable for edge cutting of soft, thin and easily-deformed paper.

Description

Technical Field

[0001] The invention relates to the technical field of paper trimming, and in particular to a device for trimming special-shaped edges of paper. Background Art

[0002] During the paper production process, in order to meet the requirements of paper size, both sides of the paper need to be trimmed, and usually a corresponding paper trimming device needs to be used for the trimming work.

[0003] Existing paper trimming devices usually use blades to trim both sides of a paper, and generally can only trim the side edges of the paper smoothly, but cannot trim papers with different edge shapes.

[0004] The patent document with the publication number CN209289426U discloses such a corrugated cardboard cutting device, including a working platform for placing corrugated boards, a cutting mechanism arranged above the working platform, and a telescopic mechanism for driving the cutting mechanism to move up and down; the working platform includes a bottom plate, a supporting leg fixed below the bottom plate, a fixed baffle fixed to the front and rear edges above the bottom plate, a top plate fixedly connected to the upper end of the fixed baffle, an elastic support fixed at the lower end on the bottom plate, and a pressure plate fixed at the upper end of the elastic support. When in use, the distance between the screw rod of each edge cutting knife and the mounting seat plate is adjusted according to the edge cutting needs of the corrugated board, the edge cutting knife at the edge of the corrugated board that needs to be cut is adjusted downward, the edge cutting knife corresponding to the edge of the corrugated board that does not need to be cut is removed or adjusted upward, the driving cylinder drives the telescopic force arm to move downward, the mounting seat plate presses the corrugated board downward with the telescopic force arm, the lower edge cutting knife cuts the edge of the corrugated board on the pressure plate, and the higher edge cutting knife cannot cut the corrugated board, so that the required edges of different shapes can be cut.

[0005] The prior art has the following problems: First, it is only suitable for trimming the shaped edges of thicker, harder, and less prone to deformation by force corrugated paperboard, but not suitable for ordinary thinner, softer, and more easily deformed papers, such as cigarette packaging paper, tipping paper, etc. The inventor analyzed that this is mainly because each shaped unit in the shaped edge has multiple cutting edges. The solution in the prior art is to press down and cut with multiple cutting knives at the same time to obtain the shaped unit. For example, the rectangular unit in the prior art embodiment has three cutting edges, which are the longitudinal cutting knife, the front horizontal cutting knife, and the rear horizontal cutting knife. Press down to cut the rectangular unit. However, for thin and soft paper, if its edge is subjected to multiple downward pressures at the same time, the pressure area is relatively large, and the edge is easily deformed and folded, which will cause the cutting line to deviate from the predetermined path, affecting the trimming effect. Second, when the prior art needs to cut other edge shapes, it is necessary to change the shape of each cutting knife and adjust the height of each cutting knife, which is complicated and error-prone. Summary of the invention

[0006] The present invention aims to solve the above-mentioned problem and provides a cutting device which can cut various irregular edges of thin, soft and easily deformed paper, especially cigarette paper.

[0007] The technical solution to the problem solved by the present invention is to provide a device for trimming the special-shaped edges of paper, including an abutment roller, a trimming roller, a rotating drive member and a moving drive member; the surface of the abutment roller is sleeved with a deformable first flexible sleeve; the surface of the trimming roller is sleeved with a trimming ring, the trimming ring includes a plurality of trimming units arranged in sequence along the circumferential direction of the trimming roller, the trimming unit includes a plurality of cutting side edges; a trimming channel for paper to pass through is formed between the abutment roller and the trimming roller; the moving drive member drives the abutment roller and / or the trimming roller to move, so that the trimming ring is pressed against the first flexible sleeve and the first flexible sleeve is deformed; the rotating drive member drives the trimming roller and the trimming ring to rotate, so that the plurality of cutting side edges cut the paper in sequence.

[0008] As a preferred embodiment of the present invention, the trimming unit includes a side surface and a front surface away from the trimming roller, and the edge between the front surface and the side surface forms the cutting side edge; the front surface includes a pressing portion that can press against the paper during the rotary trimming process.

[0009] As a preferred embodiment of the present invention, the front side and / or the side side includes an anti-wear portion which can never come into contact with the paper during the rotary trimming process, and the anti-wear portion is arranged between the pressing portion and the cutting side edge.

[0010] As a preferred embodiment of the present invention, the trimming ring further comprises a connecting portion, and a plurality of the trimming units are connected to one of the connecting portions; the connecting portion is interference connected to the trimming roller.

[0011] As a preferred embodiment of the present invention, the trimming roller sleeve is provided with a second flexible sleeve, and the trimming ring sleeve is arranged on the second flexible sleeve; the side of the connecting portion close to the second flexible sleeve includes a contact portion, and a raised portion protruding in a direction close to the second flexible sleeve relative to the contact portion; the contact portion abuts against the second flexible sleeve, and the raised portion presses against the second flexible sleeve and causes the second flexible sleeve to be concave and deformed.

[0012] As a preferred embodiment of the present invention, the connecting portion includes a first half ring and a second half ring, and two ends of the first half ring are respectively connected to two ends of the second half ring through elastic members.

[0013] As a preferred embodiment of the present invention, the trimming roller is provided with two trimming rings, and a Teflon sleeve is provided between the two trimming rings.

[0014] As a preferred embodiment of the present invention, a gap is provided between the trimming unit and the trimming roller, and an end portion of the Teflon sleeve is inserted into the gap.

[0015] As a preferred embodiment of the present invention, a lubricating layer is provided on the surface of the first flexible sleeve.

[0016] As a preferred embodiment of the present invention, it also includes a transport roller group for transporting paper through the trimming channel.

[0017] Beneficial effects of the present invention: 1. In this application, a method of rotating cutting of special-shaped edges is provided. Under the rotating structure, the cutting side edges of the trimming unit cut the paper sequentially, rather than simultaneously as in the prior art. Therefore, only one linear pressure is applied to the paper each time the paper is cut, rather than the surface pressure formed by the combination of multiple linear pressures in the prior art. This makes it less likely to cause the paper to deform, and can effectively ensure the trimming effect. Based on this, the trimming device of this application is suitable for various papers, especially for soft, thin and easily deformed papers, and especially for cigarette papers.

[0018] 2. In the present application, edges of different shapes can be cut simply by replacing the trimming ring of the trimming unit with different shapes. The operation is simple and the application range is wide.

[0019] 3. In some embodiments, a pressing part is provided to stabilize the edge after a single side edge cutting, to prevent its deformation and cause the next side edge cutting path to deviate, thereby ensuring the trimming effect. In some embodiments, a wear-proof part is provided to prevent the edge from being rubbed by the solid part of the trimming unit near the cut side edge and deforming along with the rotation of the trimming unit, thereby ensuring the trimming effect.

[0020] 4. In some embodiments, the trimming ring is interference-connected with the trimming roller to prevent the trimming ring from moving during the trimming process and affecting the trimming effect.

[0021] 5. In some embodiments, a Teflon sleeve and / or a lubricating layer is provided to prevent the paper body from being damaged due to excessive friction between the abutting roller and the trimming roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The invention is a schematic diagram of the overall structure of a device for trimming irregular-shaped edges of paper; Figure 2 The invention is a schematic structural diagram of an implementation method of an abutting roller and a trimming roller in a device for trimming a paper with a special-shaped edge; Figure 3 The present invention is a schematic structural diagram of another embodiment of an abutting roller and a trimming roller in a device for trimming a paper with a special-shaped edge; Figure 4 The invention is a schematic diagram of an implementation mode of a trimming unit in a device for trimming special-shaped edges of paper; Figure 5 It is a schematic diagram of another embodiment of a trimming unit in a device for trimming special-shaped edges of paper; Figure 6 The present invention is a schematic diagram of another embodiment of a trimming unit in a device for trimming special-shaped edges of paper; Figure 7 The present invention is a working schematic diagram of a device for trimming irregular-shaped edges of paper; Figure 8 The present invention is a front view of an implementation method of a trimming roller and a trimming ring in a device for trimming a paper with a special-shaped edge; Fig. 9 The invention is a side view of an embodiment of a trimming roller and a trimming ring in a device for trimming a paper with a special-shaped edge; In the figure: abutment roller 1, first flexible sleeve 11, trimming roller 2, second flexible sleeve 21, Teflon sleeve 22, trimming ring 3, connecting part 31, abutment part 311, protrusion 312, elastic member 313, trimming unit 32, cutting side edge 321, pressing part 322, anti-wear part 323, rotating drive member 41, moving drive member 42, transport roller group 5. DETAILED DESCRIPTION

[0023] The following are specific implementations of the present invention, and in conjunction with the accompanying drawings, the technical solution of the present invention is further described, but the present invention is not limited to these embodiments.

[0024] A paper profile edge trimming device, such as Figure 1 , 2 , 3, it comprises an abutting roller 1, a trimming roller 2, a rotating driving member 41 and a moving driving member 42. The surface of the abutting roller 1 is covered with a deformable first flexible sleeve 11, and the surface of the trimming roller 2 is covered with a trimming ring 3. In the present application, the abutting roller 1 and the trimming roller 2 are driven by the moving driving member 42 to clamp the paper, and the paper is clamped to a state where the trimming ring 3 can deform the first flexible sleeve 11; then the trimming roller 2 and the trimming ring 3 are driven to rotate by the rotating driving member 41 to trim the paper.

[0025] The abutting roller 1 and the trimming roller 2 are arranged in parallel, so that a trimming channel for paper to pass through is formed between the abutting roller 1 and the trimming roller 2. In some embodiments, two parallel support plates may be provided, and the abutting roller 1 and the trimming roller 2 are both arranged between the two support plates.

[0026] In some embodiments, in order to make the paper always in a tensioned state in the trimming channel to improve the trimming effect and to improve the trimming efficiency, as Figure 1As shown, it also includes a transport roller group 5 for transporting paper through the trimming channel. The structure of the transport roller group 5 is not limited, and a roller group commonly used in the prior art can be used, such as at least including a reel, a first pressing group, a second pressing group, and a reel, and the first and second pressing groups both include two paper pressing rollers. The paper is unwound from the reel, and after being smoothed between the two paper pressing rollers of the first pressing group, it is sent to the trimming channel and kept tensioned on the first flexible sleeve 11 of the abutting roller 1, and then sent to the second pressing group between the two paper pressing rollers for secondary smoothing, and finally sent to the reel for rewinding.

[0027] On this basis, in some embodiments, in order to improve the smoothing effect, the distance between the two paper pressing rollers in the first and second pressing groups can be adjusted, for example, one of the paper pressing rollers is connected to a cylinder; for example, one paper pressing roller is connected to a rotating roller, and the rotating roller is connected to the cylinder through a connecting rod, and the rotating roller is driven to rotate by the movement of the cylinder piston rod, thereby driving the paper pressing roller to press on the other pressing roller to flatten the paper.

[0028] The mobile driving member 42 is used to drive the abutting roller 1 and / or the trimming roller 2 to move, so as to control the distance of the trimming channel and the cutting force. The structure of the mobile driving member 42 is not limited. In some embodiments, it can be as follows: Figure 2 and Figure 3 As shown, a slide groove is provided on the support plate, and the guiding direction of the slide groove is parallel to the direction from the abutting roller 1 to the trimming roller 2, and the two ends of the abutting roller 1 are respectively arranged in the slide groove through sliders. The moving driving member 42 is a cylinder, and the piston rod of the cylinder is connected to the abutting roller 1, and the abutting roller 1 is controlled by the cylinder to move along the slide groove toward or away from the trimming roller 2.

[0029] In the present application, the tight contact between the abutting roller 1 and the trimming roller 2 is very important. Generally speaking, the cylinder can prevent the abutting roller 1 from moving away from the trimming roller 2 during the trimming process. In some embodiments, in order to further ensure that the abutting roller 1 does not move in the reverse direction during the trimming process, such as Figure 3 As shown, the top of the slider of the abutting roller 1 is arranged in an inclined surface, and a connecting rod matched with the inclined surface of the slider, and a counterweight connected to the connecting rod and arranged above the abutting roller 1 are also provided. Under the action of the gravity of the counterweight, the connecting rod has a tendency to move downward and pushes the slider to slide toward the direction of the trimming roller 2, thereby pushing the abutting roller 1 to press against the surface of the trimming roller 2, thereby ensuring the smooth progress of the cutting work.

[0030] The rotary drive member 41 drives the trimming roller 2 and the trimming ring 3 to rotate. The structure of the rotary drive member 41 is not limited. In some embodiments, a servo motor can be selected. The central axis of the trimming roller 2 passes through the support plate and is directly connected to the output shaft of the motor or connected through a reducer. In addition, to ensure the rotation stability of the trimming roller 2, the two ends of the central axis of the trimming roller 2 are respectively connected to the two support plates through a rotary bearing.

[0031] The material of the first flexible sleeve 11 sleeved on the surface of the abutting roller 1 is not limited. In some embodiments, a material with good elastic deformation, such as rubber, is used so that after being deformed by an external force, it can return to its original shape when the external force is removed, so as to be able to continuously press against the trimming roller 2. The installation method of the abutting roller 1 and the first flexible sleeve 11 is not limited, and preferably a detachable connection is provided so that the first flexible sleeve 11 can be replaced when it is worn out due to long-term use or its deformation is no longer reversible. The detachable connection method is not limited. In some embodiments, it can be as follows Figure 2 As shown, a clamping groove is provided on the surface of the abutting roller 1, and a clamping strip is provided on the inner wall of the first flexible sleeve 11. The clamping groove and the clamping strip cooperate to realize the connection of the first flexible sleeve 11 on the abutting roller 1 and prevent the two from rotating relative to each other. In some embodiments, clamping rings can be provided at both ends of the central axis of the abutting roller 1, and the central axis of the abutting roller 1 and the clamping ring are provided with radial holes and connected by radial screws, so that the clamping ring cannot move axially and cannot rotate relative to the abutting roller 1; then the two ends of the first flexible sleeve 11 are respectively abutted against the clamping rings to prevent the first flexible sleeve 11 from moving axially during use.

[0032] According to the need of single-side trimming or double-side trimming, the trimming ring 3 provided on the surface of the trimming roller 2 can be one or two. Figure 2 As shown, when two trimming rings 3 are provided, the two trimming rings 3 are respectively provided at both ends of the trimming roller 2 in the axial direction. In addition, the thickness of the trimming ring 3 along the radial direction of the trimming roller 2 is smaller than the thickness of the first flexible sleeve 11 along the radial direction of the abutting roller 1, so as to prevent the trimming ring 3 from being pressed against the hard body of the abutting roller 1 and being worn.

[0033] The trimming ring 3 includes a plurality of trimming units 32 arranged in sequence along the circumferential direction of the trimming roller 2. The shape of the trimming units 32 is determined according to the required edge shape. Figure 4 As shown, the trimming unit 32 is semicircular, so that a wavy edge can be trimmed. Figure 5 As shown, the trimming unit 32 is triangular, so that a sharp tooth-shaped edge can be trimmed. Figure 6 As shown, the trimming unit 32 is rectangular, so that a square tooth-shaped edge can be trimmed. Figure 4 , 5 As can be seen from FIG. 6 , as long as the edge is a special-shaped or non-linear edge, the trimming unit 32 always has a plurality of cutting edges 321 . Figure 4 The arc-shaped trimming unit 32 in the embodiment can be regarded as a plurality of very short lines connected in sequence, and these lines are the cutting edges 321 . Figure 5 The triangular trimming unit 32 in FIG. 3 obviously has two cutting side edges 321 . Figure 6The rectangular trimming unit 32 has three cutting side edges 321. For ease of description, the three cutting side edges 321 are respectively recorded as 321 (a), 321 (b), and 321 (c).

[0034] by Figure 6 Taking the rectangular trimming unit 32 in the figure as an example, the cutting method of the present application is as follows Figure 7 As shown, the trimming roller 2 rotates counterclockwise, and firstly, the cutting edge 321(a) parallel to the axial direction of the trimming roller 2 contacts the paper for the first linear cutting, and cuts a straight seam perpendicular to the paper conveying direction at the edge of the paper; then, the cutting edge 321(b) perpendicular to the axial direction of the trimming roller 2 contacts the paper for the second linear cutting, and cuts a straight seam parallel to the paper conveying direction, and this straight seam is continuous with the previous straight seam, thereby forming an L-shaped cutting seam; finally, the cutting edge 321(c) parallel to the axial direction of the trimming roller 2 contacts the paper for the third linear cutting, and cuts a straight seam perpendicular to the paper conveying direction, and this straight seam is continuous with the previous L-shaped cutting seam, thereby forming a U-shaped cutting seam, that is, a rectangular block is cut off from the edge of the paper. Through the continuous transmission of the paper and a plurality of trimming units 32 arranged at intervals, multiple rectangular blocks can be cut off from the edge of the paper along its conveying direction at intervals, so that the edge of the paper forms a square tooth shape.

[0035] The trimming unit 32 may be Figure 4 , 5 The physical structure shown in FIG. 1 includes a front side away from the trimming roller 2 and a back side close to the trimming roller 2. The side surface is between the front side and the back side. The edge between the front side and the side surface forms a cutting side edge 321. Figure 6 The frame structure with a hollow interior is shown as being formed by connecting a number of cutting knives end to end, wherein the blades of the cutting knives are located between the side and front sides of the frame structure and are the cutting side edges 321 .

[0036] Generally speaking, in order to improve the cutting effect, the sharper the cutting side edge 321 is, the better, so a frame structure trimming unit 32 is selected. However, in this application, since a sequential cutting method is adopted, after the front cutting side edge 321 is cut, the edge will be partially disconnected. In this case, the edge is more likely to deform. Therefore, in this application, a simple frame structure is not the most preferred. In some embodiments, a pressing part 322 that can press against the paper during the rotating trimming process needs to be provided. For example, Figure 4 As shown, a solid trimming unit 32 is used to retain its front solid part, and its front solid part can be used as a pressing part 322 to press the paper. Figure 5 As shown, the central part of the front side retains a central part parallel to the plane where the two cutting side edges 321 are located, and this central part is used as the pressing part 322. Figure 6 As shown, a solid block is added in the middle of the frame structure, and its front side is used as the pressing part 322. Figure 7 During the cutting process of the cutting edge 321 (b), the pressing portion 322 can press against the paper.

[0037] In some embodiments, based on the pressing portion 322, in order to simultaneously ensure the pressing effect and achieve the sharp cutting effect, the Figure 5 As shown, the portion between the cutting side edge 321 and the pressing portion 322 is set as a concave surface that is sunken toward the center of the trimming unit 32, so that the cutting side edge 321 is relatively sharper. At the same time, because it is a concave surface, it can never contact with the paper during the rotary trimming process and becomes an anti-wear portion 323, so that after the cutting side edge 321 completes the cutting, it will not rub against the paper and cause the paper to deform. The side surface can also be set as a concave surface that is sunken toward the center of the trimming unit 32 to serve as the anti-wear portion 323. It can also be as shown in FIG. Figure 6 As shown, a gap is reserved between the solid block as the pressing portion 322 and the frame to serve as the anti-wear portion 323. At this time, the outer side of the frame can be set as a concave surface that is recessed toward the center of the trimming unit 32 to serve as the anti-wear portion 323. Figure 7 When the cutting edge 321 (a) contacts the paper and continues to cut, since the surfaces on both sides are either concave or empty, they will not contact the paper and drive the paper to move; after the cutting edge 321 (b) cuts a short distance, the pressing part 322 presses on the paper again to keep the paper stable.

[0038] Secondly, in order to facilitate the connection between the plurality of trimming units 32 and the installation and removal of the plurality of trimming units 32 on the trimming roller 2, the trimming ring 3 also includes an annular connecting portion 31, and the plurality of trimming units 32 are connected to a connecting portion 31. The installation of the trimming unit 32 is achieved by connecting the connecting portion 31 with the trimming roller 2. The connecting portion 31 and the trimming roller 2 are preferably detachably connected, so as to be used for replacing the trimming ring 3 of the trimming unit 32 of different shapes, or adjusting the distance between the two trimming rings 3 to adjust the required paper width.

[0039] In some embodiments, on the basis of the detachable connection, the installation stability of the trimming ring 3 on the trimming roller 2 affects the trimming effect, so it is considered to make the connecting portion 31 and the trimming roller 2 interference connected to prevent the trimming ring 3 from rotating and moving. The interference connection method is not limited, for example, Figure 8 , 9As shown, first, a second flexible sleeve 21 is sleeved on the trimming roller 2. The material and connection method of the second flexible sleeve 21 can refer to the first flexible sleeve 11, and it is sufficient to ensure that the second flexible sleeve 21 will not rotate relative to the trimming roller 2 and will not move axially. Secondly, the trimming ring 3 is sleeved on the second flexible sleeve 21, and the side of the control connection part 31 close to the second flexible sleeve 21 includes an abutment part 311 and a protrusion 312 protruding in the direction close to the second flexible sleeve 21 relative to the abutment part 311. In this application, a ball groove and a ball are specifically provided on the inner ring of the connection part 31 to form a protrusion 312, and the diameter of the ball groove is smaller than the diameter of the ball, so that the ball can roll in the ball groove without falling out of the ball groove. Then when the connecting part 31 is installed to the trimming roller 2, the abutting part 311 abuts against the second flexible sleeve 21, and the protrusion 312 presses against the second flexible sleeve 21 and causes the second flexible sleeve 21 to be concave and deformed, thereby achieving an interference connection and limiting the rotation and movement of the trimming ring 3.

[0040] In some embodiments, in order to facilitate the installation of the trimming ring 3 and further improve the interference fit between the trimming ring 3 and the trimming roller 2, as shown in FIG. Fig. 9 As shown, the connecting portion 31 includes a first half ring and a second half ring, and the two ends of the first half ring are respectively connected to the two ends of the second half ring through an elastic member 313. Under the action of the elastic member 313, the distance between the first half ring and the second half ring can be expanded to facilitate the disassembly and installation of the trimming ring 3, and the first half ring and the second half ring can also be clamped on the trimming roller 2 by the elastic action of the elastic member 313. Among them, grooves are provided at the ends of the first half ring and the second half ring, and the two ends of the elastic member 313 are respectively arranged in the grooves, so that when the first half ring and the second half ring are connected to form a completed ring body, the elastic member 313 is hidden in the trimming ring 3 to avoid its protrusion affecting the trimming effect of the trimming ring 3, or affecting the installation stability of the trimming ring 3 due to external force. At the same time, a positioning groove is provided in the first half ring and a positioning block is provided in the second half ring, and the connection accuracy of the first half ring and the second half ring is ensured by the cooperation of the positioning groove and the positioning block.

[0041] In some embodiments, since the paper is clamped by the abutting roller 1 and the trimming roller 2, and the paper needs to be continuously transported, in order to avoid the friction of the first flexible sleeve 11 and the second flexible sleeve 21, which may cause the paper body to be damaged by friction during the trimming process, it is considered to set a lubricating layer on the abutting roller 1 and the trimming roller 2. For the trimming roller 2, the setting of the lubricating layer should not affect the installation stability of the trimming ring 3. Therefore, in the embodiment with two trimming rings 3, a Teflon sleeve 22 for reducing friction is set between the two trimming rings 3, and the trimming ring 3 is still in interference connection with the second flexible sleeve 21. At the same time, Teflon sleeves 22 of different widths can also be replaced according to the width of the paper. In some embodiments, in order to ensure the stability of the Teflon sleeve 22, a gap can be set between the trimming unit 32 and the trimming roller 2, and the end of the Teflon sleeve 22 is inserted into the gap, and the Teflon sleeve 22 is pressed by the trimming ring 3. In the embodiment where only one side edge needs to be trimmed and only one trimming ring 3 is provided, a clamping ring can be provided on the other side of the trimming roller 2 to stop the circumferential movement of the Teflon sleeve 22. For the abutting roller 1, a lubricating layer, such as a polytetrafluoroethylene coating, can be directly provided on the surface of the first flexible sleeve 11, which has little effect on the trimming effect.

[0042] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A device for trimming irregular edges of paper, characterized in that: It comprises an abutting roller (1), a trimming roller (2), a rotating driving member (41) and a moving driving member (42); The surface of the abutment roller (1) is covered with a deformable first flexible cover (11); The trimming roller (2) is sleeved with a trimming ring (3) on its surface, the trimming ring (3) comprising a plurality of trimming units (32) arranged in sequence along the circumferential direction of the trimming roller (2), the trimming units (32) comprising a plurality of cutting side edges (321); a trimming channel for paper to pass through is formed between the abutting roller (1) and the trimming roller (2); The moving drive member (42) drives the abutment roller (1) and / or the trimming roller (2) to move, so that the trimming ring (3) is pressed against the first flexible sleeve (11), and the first flexible sleeve (11) is deformed; The rotating drive member (41) drives the trimming roller (2) and the trimming ring (3) to rotate, so that the plurality of cutting side edges (321) cut the paper in sequence.

2. A paper irregular edge trimming device according to claim 1, characterized in that: The trimming unit (32) comprises a side surface and a front surface away from the trimming roller (2), wherein the edge between the front surface and the side surface forms the cutting side edge (321); the front surface comprises a pressing portion (322) capable of pressing against a paper during the rotary trimming process.

3. The device for trimming irregular edge of paper according to claim 2, characterized in that: The front surface and / or the side surface comprises an anti-wear portion (323) that cannot abut against the paper during the rotary trimming process, and the anti-wear portion (323) is arranged between the pressing portion (322) and the cutting side edge (321).

4. The device for trimming irregular edge of paper according to claim 1, characterized in that: The trimming ring (3) further comprises a connecting portion (31), and a plurality of the trimming units (32) are connected to one of the connecting portions (31); the connecting portion (31) is interference-connected with the trimming roller (2).

5. The device for trimming irregular edge of paper according to claim 4, characterized in that: The trimming roller (2) is sleeved with a second flexible sleeve (21), and the trimming ring (3) is sleeved on the second flexible sleeve (21); A surface of the connecting portion (31) close to the second flexible sleeve (21) comprises an abutting portion (311) and a protruding portion (312) protruding in a direction close to the second flexible sleeve (21) relative to the abutting portion (311); The abutting portion (311) abuts against the second flexible sleeve (21), and the protruding portion (312) presses against the second flexible sleeve (21) and causes the second flexible sleeve (21) to be concavely deformed.

6. A paper irregular edge trimming device according to claim 4 or 5, characterized in that: The connecting portion (31) comprises a first half ring and a second half ring, and two ends of the first half ring are respectively connected to two ends of the second half ring via elastic members (313).

7. A paper irregular edge trimming device according to claim 1 or 4, characterized in that: The trimming roller (2) is provided with two trimming rings (3), and a Teflon sleeve (22) is provided between the two trimming rings (3).

8. The device for trimming irregular edge of paper according to claim 7, characterized in that: A gap is provided between the trimming unit (32) and the trimming roller (2), and an end portion of the Teflon sleeve (22) is inserted into the gap.

9. The device for trimming irregular edge of paper according to claim 1, characterized in that: A lubricating layer is provided on the surface of the first flexible sleeve (11).

10. The device for trimming irregular edge of paper according to claim 1, characterized in that: It also includes a transport roller group (5) for transporting paper through the trimming channel.

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