Slitter roll and anvil roll combination for forming tension and slitting

Abstract

A structure and method for forming tension and slitting by cooperating cutter roller and bottom knife roller, which comprises cutter roller and bottom knife roller, cutter and bottom knife are arranged on cutter roller and bottom knife roller respectively, cutter roller and bottom knife roller are tangent, cutter and bottom knife are in contact with each other at the tangent position, negative pressure cavity in bottom knife roller is communicated with negative pressure hole and negative pressure window on the surface of roller body of bottom knife roller, the diameter of bottom knife roller is smaller than that of cutter roller and the linear velocity of both is the same, air extractor is communicated with negative pressure cavity of bottom knife roller, negative pressure is generated on the surface of bottom knife roller to adsorb gauze and gauze sheet, avoiding slot on cutter roller accommodates inserted blade, the blade edge of the slope surface and the circular arc transition section of inserted blade is in contact with gauze, which is beneficial to the instantaneous transfer of gauze after cutting and the gauze is clamped again to form tension, which will not scratch gauze to form wool on the surface of gauze and will not cause thread end to be drawn.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical product production equipment, and relates to a structure and method for forming tension and slitting by cooperation of a cutter roller and a bottom cutter roller. BACKGROUND

[0002] In medical products, a barium thread gauze used in surgery is involved, and a preparation process of the barium thread gauze adopts a folding machine to fold the gauze in multiple ways. Before folding, a barium thread is transferred to the gauze and attached to the gauze. The transfer of the gauze is realized by a transfer roller, and the barium thread is pulled to the gauze and attached to the gauze to form an integrated body. After the gauze is slitted into gauze pieces, the gauze pieces are folded. In the current folding machine, problems mainly exist in the pulling, slitting and transferring processes. The problems are that the cutter roller and the bottom cutter roller cannot form tension at the moment of slitting, and the gauze rebounds during the release process. In the slitting process of the gauze pieces, the blade on the bottom cutter roller easily scratches the gauze to form a wool line on the surface of the gauze. The gauze pieces after slitting easily cause the thread end to be drawn in the transferring process. SUMMARY

[0003] The application aims to provide a structure and method for forming tension and slitting by cooperation of a cutter roller and a bottom cutter roller. The cutter and the bottom cutter are arranged on the cutter roller and the bottom cutter roller respectively. The cutter roller and the bottom cutter roller are tangent to each other. The cutter and the bottom cutter are in contact with each other at the tangent position. A negative pressure cavity in the bottom cutter roller is in communication with a negative pressure window on the surface of the roller body of the bottom cutter roller. The diameter of the bottom cutter roller is smaller than that of the cutter roller, and the linear velocities of the two are the same. An air extractor is in communication with the negative pressure cavity of the bottom cutter roller. Negative pressure is generated on the surface of the bottom cutter roller to adsorb the gauze and the gauze pieces. The avoiding groove on the cutter roller accommodates the inserted blade. The inclined surface of the inserted blade and the blade edge of the circular arc transition section are in contact with the gauze. This is favorable for the gauze to be transferred and clamped again to form tension at the moment after being cut, and the gauze is not scratched to form a wool line on the surface of the gauze, and the thread end is not drawn.

[0004] To solve the above technical problems, the technical scheme adopted by the application is as follows: a structure for forming tension and slitting by cooperation of a cutter roller and a bottom cutter roller, which comprises the cutter roller and the bottom cutter roller. The cutter and the bottom cutter are arranged on the cutter roller and the bottom cutter roller respectively. The cutter roller and the bottom cutter roller are reversely rotated and tangent to each other. The cutter and the bottom cutter are in contact with each other at the tangent position. A negative pressure cavity arranged in the bottom cutter roller is in communication with a negative pressure window on the surface of the roller body of the bottom cutter roller. The negative pressure window is close to the bottom cutter. The diameter of the bottom cutter roller is smaller than that of the cutter roller.

[0005] A plurality of avoiding grooves are arranged on the surface of the roller body of the cutter roller in the axial direction. The avoiding grooves accommodate the inserted blade at the tangent position of the cutter roller and the bottom cutter roller.

[0006] A plurality of blade notches are arranged on the surface of the roller body of the cutter roller in the axial direction. The cutter is arranged in the blade notches. The blade edge of the cutter is located outside the blade notches.

[0007] The roll body of the bottom knife roll is provided with a negative pressure cavity and a plurality of negative pressure holes in communication with the surface of the roll body.

[0008] The roll body of the bottom knife roll is provided with a plurality of bottom knife grooves in the axial direction, and a bottom knife is arranged in the bottom knife groove.

[0009] The roll body of the bottom knife roll is provided with a plurality of concave negative pressure windows in the axial direction, and a plurality of rectangular suction holes are arranged on one side of the negative pressure holes in the negative pressure window in the axial direction of the roll body.

[0010] The roll body of the bottom knife roll is provided with a plurality of knife insertion holes in the axial direction, and a knife insertion mechanism is arranged in the knife insertion hole.

[0011] The knife insertion mechanism comprises a knife shaft connected to a knife blade, and bearings arranged at both ends of the knife shaft and matched with the knife insertion hole on the bottom knife roll.

[0012] The shaft body of the knife shaft is provided with a notch in the middle, and one side of the knife blade is connected to the notch, and a slope surface is arranged on one side of the knife edge of the knife blade extending out of the knife insertion hole.

[0013] The cutting method of the cutting knife roll and the bottom knife roll is as follows:

[0014] S1, clamping, after the gauze roll releases the gauze, the gauze is pulled into the cutting knife roll and the bottom knife roll together with the barium wire, and is clamped by the cutting knife roll and the bottom knife roll; in this step, the barium wire is attached to the gauze to form a whole;

[0015] S2, pulling and adsorbing, the cutting knife roll and the bottom knife roll rotate in opposite directions to pull the gauze, and the gauze end is adsorbed by the negative pressure hole and the negative pressure window on the bottom knife roll after passing through the clamping point;

[0016] S3, slitting, the gauze is cut to form a gauze piece when the cutting knife and the bottom knife contact each other; in this process, the linear velocity of the cutting knife roll and the bottom knife roll is the same, the diameter of the bottom knife roll is smaller than that of the cutting knife roll, and the rotating speed of the bottom knife roll is higher than that of the cutting knife roll;

[0017] S4, forming tension and pulling, the gauze end after cutting is adsorbed by another negative pressure window on the roll body surface of the bottom knife roll with higher rotating speed than the cutting knife roll, and under the rapid rotation of the bottom knife roll, the gauze end is clamped by the cutting knife roll instantaneously, so that the gauze is in tension and the next slitting is continued;

[0018] S5, anti-scratching, during the process of being clamped and pulled by the cutter roller and the bottom knife roller, the insert knife mechanism rotates synchronously with the bottom knife roller, the insert knife blade gradually contacts the gauze, and the gauze is pushed into the avoidance groove and over the cutting point position of the cutter roller and the bottom knife roller; in this step, the slope surface of the insert knife blade and the blade edge of the arc transition section contact the gauze;

[0019] S6, anti-silk, the cut gauze piece is at the lower part of the bottom knife roller and is adsorbed on the bottom knife roller and is transferred to the drum on one side during the high-speed rotation of the bottom knife roller; in this step, the rectangular adsorption hole near the bottom knife has a larger aperture, and the gauze net matched with the negative pressure window has dense mesh holes, so that a stronger adsorption force is generated on the end of the gauze piece to firmly adsorb the end of the gauze piece and avoid the silk of the gauze piece; the gauze anti-silk and the gauze piece anti-silk are the same; in this step, because the diamond gauze mesh hole is very fine, the gauze cannot enter the hole.

[0020] The main beneficial effects of the present application are:

[0021] The diameter of the bottom knife roller is smaller than that of the cutter roller, the linear speed of the bottom knife roller and the cutter roller is the same, the rotating speed of the bottom knife roller is slightly greater than that of the cutter roller, the end of the cut gauze is quickly transferred under the adsorption of the negative pressure window of the bottom knife roller and is clamped again with the cutter roller to form a tensioning force and avoid the rebound of the gauze.

[0022] During the rotation of the cutter roller and the bottom knife roller, the bottom knife roller drives the insert knife mechanism to rotate synchronously, the avoidance groove on the cutter roller and the insert knife blade of the insert knife mechanism are coupled with each other and over the cutting point position between the cutter roller and the bottom knife roller.

[0023] The blade edge of the arc transition section of the slope surface of the insert knife blade contacts the gauze, and forms a surface contact with the gauze during the tensioning process of the gauze and the transfer process of the gauze piece, so that the surface of the gauze is not easy to be scratched and the surface scratch is avoided to form a wool thread.

[0024] The surface of the bottom knife roller is provided with negative pressure holes and negative pressure windows, the end of the gauze piece is adsorbed during the cutting and transferring process, the rectangular adsorption hole near the bottom knife has a larger aperture, and the gauze net matched with the negative pressure window has dense mesh holes, so that a stronger adsorption force is generated on the end of the gauze piece to firmly adsorb the end of the gauze piece and avoid the silk of the gauze piece; similarly, during the tensioning process of the gauze after being cut, the gauze piece anti-silk is the same. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below in combination with the drawings and examples:

[0026] Figure 1 The structure of the present application is shown in the figure.

[0027] Figure 2 The Figure 1front view of the present application.

[0028] Figure 3 is Figure 2 right view of the present application.

[0029] Figure 4 is Figure 2 top view of the present application.

[0030] Figure 5 front view of the present application.

[0031] Figure 6 is Figure 5 left view of the present application.

[0032] Figure 7 is Figure 5 sectional view of the present application at A-A.

[0033] Figure 8 structure of the present application.

[0034] Figure 9 structure of the present application.

[0035] Figure 10 is Figure 8 enlarged view of the present application at B.

[0036] In the figure: cutter roll 1, avoiding groove 11, cutter notch 12, cutter 13, bottom cutter roll 2, negative pressure cavity 21, negative pressure hole 22, bottom cutter groove 23, bottom cutter 24, negative pressure window 25, rectangular suction hole 26, gauze 27, cutter insertion hole 28, cutter insertion mechanism 3, cutter shaft 31, cutter insertion piece 32, bearing 33, inclined surface 34. DETAILED DESCRIPTION

[0037] As Figures 1-10 shown in the figure, a structure of a cutter roll and a bottom cutter roll cooperating to form tension and slitting, which comprises a cutter roll 1 and a bottom cutter roll 2; the cutter roll 1 and the bottom cutter roll 2 are respectively provided with a cutter 13 and a bottom cutter 24, the cutter roll 1 and the bottom cutter roll 2 rotate in opposite directions and are tangent to each other, the cutter 13 and the bottom cutter 24 contact each other at the tangent position; a negative pressure cavity 21 provided in the bottom cutter roll 2 communicates with a negative pressure window 25 on the surface of the roll body of the bottom cutter roll 2; the negative pressure window 25 is close to the bottom cutter 24; the diameter of the bottom cutter roll 2 is smaller than that of the cutter roll 1. In use, an air extractor communicates with the negative pressure cavity 21 of the bottom cutter roll 2 to generate negative pressure on the surface of the bottom cutter roll 2 to adsorb gauze and gauze pieces, the avoiding groove 11 on the cutter roll 1 accommodates the cutter insertion piece 32, the inclined surface 34 of the cutter insertion piece 32 and the blade of the circular arc transition section contact the gauze, which is beneficial to the gauze to be transferred instantly after being cut and to be clamped again to form tension, so as to avoid scratching the gauze to form wool on the surface of the gauze and to avoid causing the thread to be pulled out.

[0038] Preferably, the diameter of the bottom knife roller 2 is 1-3mm smaller than the diameter of the cutting knife roller 1.

[0039] In the preferred embodiment, the cutting knife roller 1 is provided with a plurality of avoiding grooves 11 on the surface of the roller body in the axial direction, which accommodate the cutting blade 32 at the tangent position of the cutting knife roller 1 and the bottom knife roller 2. In use, the bottom knife roller 2 drives the cutting blade mechanism 3 to rotate synchronously during the rotation of the cutting knife roller 1 and the bottom knife roller 2, the avoiding grooves 11 on the cutting knife roller 1 and the cutting blade 32 of the cutting blade mechanism 3 are coupled with each other, and pass through the tangent position between the cutting knife roller 1 and the bottom knife roller 2.

[0040] In the preferred embodiment, the cutting knife roller 1 is provided with a plurality of knife notches 12 on the surface of the roller body in the axial direction, and the cutting knife 13 is arranged in the knife notches 12. In use, the cutting knife 13 is arranged outside the knife notches 12 on the surface of the cutting knife roller 1, and contacts the bottom knife 24 at the tangent position of the cutting knife roller 1 and the bottom knife roller 2, and cuts the gauze. The cut part of the gauze is a gauze piece.

[0041] In the preferred embodiment, the bottom knife roller 2 is provided with a negative pressure cavity 21 in the roller body, which is in communication with the negative pressure holes 22 densely arranged on the surface of the roller body, and the shaft heads at both ends of the roller body are in communication with the negative pressure cavity 21. In use, the air extractor is in communication with the shaft heads at both ends of the roller body of the bottom knife roller 2, and generates negative pressure in the negative pressure cavity 21, so that negative pressure is generated around the negative pressure holes 22, and finally a negative pressure surface is formed on the surface of the roller body of the bottom knife roller 2, which acts on the gauze piece to adsorb the gauze piece.

[0042] In the preferred embodiment, the bottom knife roller 2 is provided with a plurality of bottom knife grooves 23 on the surface of the roller body in the axial direction, and the bottom knife 24 is arranged in the bottom knife grooves 23. In use, the bottom knife 24 cooperates with the cutting knife 13 to cut the gauze. During the cutting process, the gauze is pressed against the end face of the bottom knife 24 by the blade of the cutting knife 13, and is cut when passing through the tangent position during the rotation. Since the end face of the bottom knife 24 is recessed in the bottom knife groove 23, and the blade of the cutting knife 13 protrudes outside the knife notch 12, a certain tension force is generated on the gauze during the rotation when the cutting knife 13 and the bottom knife 24 are in contact but have not cut the gauze.

[0043] In the preferred embodiment, the bottom knife roller 2 is provided with a plurality of recessed negative pressure windows 25 on the surface of the roller body in the axial direction, and the negative pressure holes 22 in the negative pressure windows 25 are provided with rectangular adsorption holes 26 arranged along the axial direction of the roller body on one side. The rectangular adsorption holes 26 are close to the bottom knife grooves 23, and the gauze net 27 cooperates with the negative pressure windows 25 to be closed. The mesh of the gauze net 27 is a dense mesh, and the aperture is much smaller than the aperture of the negative pressure holes 22. In use, the negative pressure windows 25 are recessed on the surface of the roller body of the bottom knife roller 2, and the gauze net 27 is arranged in the negative pressure holes 22 and the rectangular adsorption holes 26 inside the negative pressure windows 25. The dense mesh of the gauze net 27 disperses the negative pressure in the area of the negative pressure windows 25 more evenly, and the adsorption force in this area is greater than that outside the area.

[0044] Preferably, the rectangular suction hole 26 in the negative pressure window 25 has a ventilation cross section much larger than that of the negative pressure hole 22, forming a larger negative pressure air flow, and being close to the bottom knife slot 23, the bottom knife 24 in the bottom knife slot 23 is located at the yarn cloth cutting point, and a larger suction force is formed on the yarn cloth or yarn cloth piece before and after the yarn cloth is cut.

[0045] Preferably, the mesh of the gauze 27 is a dense mesh, and after the end of the yarn cloth or yarn cloth piece is firmly adsorbed on the gauze 27, even if it is disturbed by the swing of the knife blade 32, it will not fall off, and the cutting line at the end of the yarn cloth or yarn cloth piece will not be adsorbed under the gauze 27, nor will it be adsorbed into the negative pressure cavity 21 of the bottom knife roller 2 by the negative pressure hole 22 outside the gauze 27 area, thereby avoiding the occurrence of yarn extraction.

[0046] In the preferred embodiment, the roller body surface of the bottom knife roller 2 is provided with a plurality of knife insertion holes 28 in the axial direction, and the knife insertion mechanism 3 is arranged in the knife insertion hole 28. In use, the knife insertion mechanism 3 is used to transfer the yarn cloth piece to the rotating drum of the high-speed folding machine. The rotating drum is not shown in the figure.

[0047] In the preferred embodiment, the knife insertion mechanism 3 includes a knife blade 32 connected to a knife shaft 31, and bearings 33 matched at both ends of the knife shaft 31, which are matched with the knife insertion hole 28 on the bottom knife roller 2. When installed, the bearings 33 are matched with the knife insertion hole 28, and the knife blade 32 extends outward from the opening slot of the knife insertion hole 28; in use, during the transfer and cutting of the yarn cloth piece, the knife blade 32 drives the knife shaft 31 to rotate around the bearing 33 under the action of centrifugal force, and the slot along the two sides of the opening slot limits the knife blade 32.

[0048] Preferably, before the yarn cloth is cut, the knife blade 32 is in contact with the yarn cloth and pushes the yarn cloth into the avoidance slot 11 during the gradual coupling process of the knife blade 32 and the avoidance slot 11 on the cutter roller 1; during this process, the knife blade 32 swings and rests on one side of the slot along the opening slot of the knife insertion hole 28 under the action of centrifugal force.

[0049] Preferably, after the yarn cloth is cut, the cut yarn cloth piece is inserted into the rotating drum during the transfer process, and the knife blade 32 cooperates with the rotating drum to insert the yarn cloth piece into the rotating drum; during this process, the knife blade 32 is forced to swing slightly in the opening slot of the knife insertion hole 28.

[0050] Preferably, during the swing of the knife blade 32, the yarn cloth or yarn cloth piece is stressed, and one end of the yarn cloth or yarn cloth piece is firmly adsorbed by the negative pressure window 25, which is not easy to cause end yarn extraction.

[0051] In the preferred embodiment, the shaft body of the cutter shaft 31 is provided with a notch, and the cutter blade 32 is connected to the notch on one side. The side of the cutter blade 32 extending out of the cutter hole 28 is provided with a slope surface 34. The edge of the slope surface 34 is a circular arc transition section. In use, the edge of the slope surface 34 of the cutter blade 32 is a circular arc transition section, so that when the cutter blade 32 contacts the gauze or gauze sheet, the edge contacts the surface, thereby expanding the contact area. The side of the edge is a slope surface 34, which is beneficial to the surface contact of the cutter blade 32 with the gauze and gauze sheet when the cutter blade 32 swings. The smooth transition does not easily damage the surface of the gauze and gauze sheet.

[0052] Preferably, a plurality of connection holes are arranged in the notch on the cutter shaft 31 in the axial direction. The U-shaped notch on one side of the cutter blade 32 corresponds to the connection holes. The fastener is connected and fixed by penetrating the U-shaped notch and the connection hole. The cutter blade 32 is convenient to disassemble and install, and the extension amount of the cutter blade 32 is convenient to adjust, thereby facilitating the adjustment of the cooperation amount with the rotating drum during debugging.

[0053] In the preferred embodiment, the cutting method of the cutting roller and the bottom cutting roller to form tension and perform slitting includes the following steps:

[0054] S1, clamping, after the gauze roll releases the gauze, the gauze is pulled into the cutting roller 1 and the bottom cutting roller 2 together with the barium wire, and is clamped by the cutting roller 1 and the bottom cutting roller 2. In this step, the barium wire is attached to the gauze to form a whole.

[0055] S2, pulling and adsorbing, the cutting roller 1 and the bottom cutting roller 2 rotate in opposite directions to pull the gauze to move. After the end of the gauze passes the clamping point, it is adsorbed by the negative pressure hole 22 and the negative pressure window 25 on the bottom cutting roller 2.

[0056] S3, slitting, when the cutting knife 13 and the bottom cutting knife 24 contact each other, the gauze is cut to form a gauze sheet. In this process, the linear speed of the cutting roller 1 and the bottom cutting roller 2 is the same, the diameter of the bottom cutting roller 2 is smaller than that of the cutting roller 1, and the rotating speed of the bottom cutting roller 2 is higher than that of the cutting roller 1.

[0057] S4, forming tension and pulling, the bottom cutting roller 2 with a higher rotating speed than the cutting roller 1 adsorbs the end of the cut gauze by the other negative pressure window 25 on the surface of the roller body. Under the rapid rotation of the bottom cutting roller 2, the end of the gauze is clamped by the cutting roller 1 instantaneously, so that the gauze is in a tension state, and the next slitting is continued.

[0058] S5, anti-scratching, in the process of being clamped and pulled by the cutting roller 1 and the bottom cutting roller 2, the cutter mechanism 3 rotates synchronously with the bottom cutting roller 2. The cutter blade 32 gradually contacts the gauze, pushes the gauze into the avoidance groove 11, and passes the cutting point position of the cutting roller 1 and the bottom cutting roller 2. In this step, the edge of the slope surface 34 and the circular arc transition section of the cutter blade 32 contacts the gauze.

[0059] S6, anti-silk, the gauze piece after cutting is in the lower part of the bottom knife roller 2, is adsorbed on the bottom knife roller 2 and is transferred to the drum on one side in the process of high-speed rotation of the bottom knife roller 2;In this step, the rectangular adsorption hole 26 near the bottom knife 24 has a larger aperture, and the dense mesh 27 matched with the negative pressure window 25 on the upper part is a dense mesh, so that a stronger adsorption force is generated on the gauze piece end head, the gauze piece end head is firmly adsorbed, and the thread on the gauze piece is prevented from being silked;The gauze anti-silk and the gauze piece anti-silk are the same;In this step, because the diamond mesh is very fine, the gauze cannot enter the hole.

[0060] The above method can clamp the gauze end head again at the moment of slitting the gauze, and form a tensioning force;In the process of swinging the insert blade 32, the slope surface 34 and the circular arc transition section at the blade edge are used to contact the gauze or gauze piece, so that the wool is prevented from being scraped and formed;In the process of swinging the insert blade 32, the gauze or gauze piece is stressed, one end of the gauze or gauze piece is firmly adsorbed by the negative pressure window 25, and the end head is not easy to be silked.

[0061] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application, the embodiments in the application and the features in the embodiments can be combined with each other in a non-conflicting manner.The protection scope of the present application should be the technical solutions recited in the claims, including the equivalent replacement solutions of the technical features recited in the claims as the protection scope.I.e., the equivalent replacement improvement within this range is also within the protection scope of the present application.

Claims

1. A structure of a cutting knife roll and a bottom knife roll cooperating to form tension and slit, characterized in that: It includes cutter roller (1) and bottom knife roller (2); Cutter roller (1) and bottom knife roller (2) are provided with cutter (13) and bottom knife (24) respectively, cutter roller (1) and bottom knife roller (2) rotate reversely and tangentially, cutter (13) and bottom knife (24) contact each other at the tangential point; ​ The roller body of bottom knife roller (2) is provided with negative pressure cavity (21) and negative pressure hole (22) densely distributed on the surface of roller body, the shaft head at both ends of roller body is communicated with negative pressure cavity (21); The surface of roller body of bottom knife roller (2) is provided with a plurality of concave negative pressure windows (25) in axial direction, the negative pressure hole (22) in negative pressure window (25) is provided with rectangular suction hole (26) arranged along the axial direction of roller body on one side; Rectangular suction hole (26) is close to bottom knife groove (23), and gauze (27) is closed in cooperation with negative pressure window (25); The mesh of gauze (27) is dense mesh, and the aperture is much smaller than that of negative pressure hole (22); The ventilation section of rectangular suction hole (26) in negative pressure window (25) is much larger than that of negative pressure hole (22); The negative pressure cavity (21) provided in bottom knife roller (2) is communicated with negative pressure window (25) on the surface of roller body of bottom knife roller (2); Negative pressure window (25) is close to bottom knife (24); The diameter of bottom knife roller (2) is smaller than that of cutter roller (1); The surface of roller body of bottom knife roller (2) is provided with a plurality of bottom knife grooves (23) in axial direction, and bottom knife (24) is arranged in bottom knife groove (23); The end face of bottom knife (24) is located in bottom knife groove (23); The surface of roller body of bottom knife roller (2) is provided with a plurality of knife inserting holes (28) in axial direction; The knife inserting hole (28) is provided with a knife inserting mechanism (3); The knife inserting mechanism (3) includes knife shaft (31) connected with knife blade (32), bearing (33) located at both ends of knife shaft (31) and matched, and bearing (33) matched with knife inserting hole (28) on bottom knife roller (2); The surface of roller body of cutter roller (1) is provided with a plurality of avoiding grooves (11) in axial direction, and avoiding groove (11) accommodates knife blade (32) at the tangent point of cutter roller (1) and bottom knife roller (2); The side of knife edge of knife blade (32) extending out of knife inserting hole (28) is provided with inclined surface (34); The edge of inclined surface (34) is circular arc transition section.

2. The structure of the cutting knife roll and the bottom knife roll cooperating to form tension and slitting according to claim 1, characterized in that: The surface of roller body of cutter roller (1) is provided with a plurality of knife grooves (12) in axial direction, cutter (13) is arranged in knife groove, and the edge of cutter (13) is located outside knife groove (12).

3. The structure of the cutting knife roll and the bottom knife roll cooperating to form tension and slitting according to claim 1, characterized in that: The shaft body of knife shaft (31) is provided with a groove in the middle, and one side of knife blade (32) is connected with the groove.

4. The slitting method according to any one of claims 1 to 3, wherein the slitting method is characterized by, It includes the following steps: S1, clamping, after the release of gauze from gauze roll, the gauze is pulled into the cutter roller (1) and bottom knife roller (2) together with the barium line, and is clamped by cutter roller (1) and bottom knife roller (2); In this step, the barium line adheres to the gauze to form a whole; S2, traction and adsorption, cutter roller (1) and bottom knife roller (2) rotate reversely to pull the gauze to move, and the end of gauze is pulled over the clamping point and is adsorbed by negative pressure hole (22) and negative pressure window (25) on bottom knife roller (2); S3, slitting, when the cutter (13) and the bottom knife (24) come into contact with each other, the gauze is cut to form a gauze sheet; in this process, the linear speeds of the cutter roller (1) and the bottom knife roller (2) are the same, the diameter of the bottom knife roller (2) is smaller than the diameter of the cutter roller (1), and the rotation speed of the bottom knife roller (2) is higher than the rotation speed of the cutter roller (1); S4, forming tension and pulling, the bottom knife roller (2) has a rotation speed higher than that of the cutting knife roller (1), and another negative pressure window (25) on the roller surface absorbs the cut gauze end, and under the rapid rotation of the bottom knife roller (2), the gauze end is instantly clamped by the cutting knife roller (1), so that the gauze is in a tensioned state and continues to be cut next time; S5, anti-scratch, in the process of the gauze being clamped and pulled by the cutter roller (1) and the bottom knife roller (2), the inserting blade mechanism (3) rotates synchronously with the bottom knife roller (2), and the inserting blade (32) gradually contacts the gauze, pushing the gauze into the avoidance groove (11) and passing the tangent point position of the cutter roller (1) and the bottom knife roller (2); in this step, the slope surface (34) of the inserting blade (32) and the cutting edge of the arc transition section contact the gauze; S6, anti-threading, the cut gauze piece is at the bottom of the bottom knife roller (2), adsorbed on the bottom knife roller (2), and is transferred to the drum on one side during the high-speed rotation of the bottom knife roller (2); in this step, the rectangular adsorption hole (26) near the bottom knife (24) has a larger aperture, and the gauze (27) matched with the negative pressure window (25) above is a dense mesh, where a strong adsorption force is generated to act on the end of the gauze piece, firmly adsorbing the end of the gauze piece to prevent the thread on the gauze piece from being threaded; the gauze anti-threading and gauze piece anti-threading are the same; in this step, because the diamond yarn mesh is very fine, the gauze cannot enter the hole.

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