Roller cutter and film cutting machine

Abstract

The embodiment of the invention discloses a rolling wheel cutting knife and a film cutting machine. The rolling wheel cutting knife comprises a rolling wheel surface and a rolling wheel, at least two first cutting knives are adjacently arranged in the axial direction of the roller surface of the roller, and at least two first cutting knives form a group and are arranged at intervals in the circumferential direction of the roller surface of the roller; the second cutting knives are sequentially and adjacently arranged in the circumferential direction of the roller surface of the roller; a middle edge material area is formed at the junction of every two adjacent first cutting knives and every two adjacent second cutting knives. The air blowing structure comprises an air blowing opening, and the air blowing opening is located in the middle rim charge area; the air blowing opening is used for being connected with an external air source to blow off the middle offcut located in the middle offcut area. According to the embodiment of the invention, the blowing structure is arranged, so that airflow can be continuously blown out to the middle offcut in the cutting process, the middle offcut is separated from the surface of the knife roll in time, and adhesion and winding of the middle offcut are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical delivery technology, and more particularly to a film cutting machine and a roller cutter. Background Technology

[0002] In the automated production process of hot melt adhesive patches, materials need to be transferred and conveyed to the roller cutting station for forming. The existing roller cutting blades are arranged in an intermittent manner. During cutting, continuous long strips of edge material are formed between adjacent material slices. These long strips of edge material occupy a large amount of effective material area, making it impossible to form usable material slices. This reduces the output of finished products per unit length of material, resulting in low raw material utilization and high production costs. Summary of the Invention

[0003] In view of at least some of the problems and deficiencies in the prior art, embodiments of the present invention disclose a film cutting machine and a roller cutting knife, which effectively avoids material jamming and accumulation in the middle edge.

[0004] Specifically, in one aspect, an embodiment of the present invention provides a roller cutting blade, comprising: a roller surface; a plurality of first cutting blades, at least two of which are arranged adjacent to each other along the axial direction of the roller surface and are arranged at intervals along the circumferential direction of the roller surface, with at least two of the first cutting blades forming a group; a plurality of second cutting blades, which are arranged adjacent to each other sequentially along the circumferential direction of the roller surface; an intermediate edge material region is formed at the junction of two adjacent first cutting blades and two second cutting blades; and an air blowing structure, including an air blowing port located in the intermediate edge material region; the air blowing port is used to connect to an external air source to blow off the intermediate edge material located in the intermediate edge material region.

[0005] In some embodiments, a plurality of first cutting blades and a plurality of second cutting blades enclose a plurality of cutting areas, each cutting area sharing an adjacent side with an adjacent cutting area.

[0006] In some embodiments, the air blowing structure further includes: an air inlet located at one end of the roller cutter in the length direction; and an air inlet channel located inside the roller cutter and extending in the length direction, the air inlet channel being connected to the air inlet and the air blowing port.

[0007] On the other hand, an embodiment of the present invention provides a film cutting machine, including the roller cutter described in any one of the foregoing claims; the film cutting machine further includes: a first conveying mechanism, wherein the roller cutter is located below and adjacent to the first conveying mechanism; a second conveying mechanism, which is adjacent to the first conveying mechanism in a first direction; and a waste recycling mechanism, which is located below the second conveying mechanism; the waste recycling mechanism includes: a waste transfer negative pressure roller, which is adjacent to the roller cutter in the first direction and corresponds to the intermediate edge material area, wherein the rotation direction of the roller cutter is opposite to that of the waste transfer negative pressure roller; and a waste collection box, which is located below the waste transfer negative pressure roller.

[0008] In some embodiments, the waste recycling mechanism further includes a cleaning component disposed on the side of the waste transfer negative pressure roller away from the roller cutting blade in the first direction, and the cleaning component abuts against the waste transfer negative pressure roller.

[0009] In some embodiments, the first conveying mechanism includes a first negative pressure roller; the second conveying mechanism includes a second negative pressure roller, the second negative pressure roller rotating in the opposite direction to the first negative pressure roller; the first negative pressure roller is used to adsorb and convey materials; the roller cutter is used to slice the materials to form material slices when the materials are between the first conveying mechanism and the roller cutter; the second negative pressure roller is used to receive and convey the material slices when the material slices are between the first negative pressure roller and the second conveying mechanism.

[0010] In some embodiments, the roller surface includes a first end and a second end opposite to each other along its length, and the cutting area forms two side edge areas between the first end and the second end; the first negative pressure roller is provided with: a first negative pressure suction hole area corresponding to the cutting area; the first negative pressure suction hole area includes a plurality of first negative pressure suction holes, the plurality of first negative pressure suction holes being spaced apart to form a first clearance area, and the middle edge area corresponding to the first clearance area; the first negative pressure roller includes a first roller surface, the first roller surface including a third end and a fourth end opposite to each other along its length, and the first negative pressure suction hole area forming a second clearance area between the third end and the fourth end, and the second clearance area corresponding to the two side edge areas.

[0011] In some embodiments, the second negative pressure roller is provided with multiple sets of negative pressure suction holes, which are spaced apart along the length of the second negative pressure roller, and each set of negative pressure suction holes includes multiple second negative pressure suction holes, which are spaced apart along the circumference of the second negative pressure roller.

[0012] In some embodiments, the second conveying mechanism further includes a negative pressure conveyor belt, which includes multiple belt bodies; the second negative pressure roller is provided with multiple grooves, which are located between two adjacent sets of negative pressure suction holes; the multiple belt bodies are located in the multiple grooves, and the second negative pressure roller drives the multiple belt bodies to move.

[0013] In some embodiments, the belt body is provided with: a first transmission tooth disposed on the side of the belt body facing the second negative pressure roller; a second transmission tooth disposed in the groove, wherein the first transmission tooth meshes with the second transmission tooth; and a plurality of second negative pressure suction holes are spaced apart along the length direction of the belt body.

[0014] As can be seen from the above, the technical features of the present invention can have one or more of the following beneficial effects: By arranging the first and second cutting blades, independent intermediate edge material areas are formed at the junctions of adjacent first and second cutting blades. This optimizes traditional long strip edge materials into independent intermediate edge materials with concentrated dimensions and a regular layout, effectively reducing the material area occupied by the edge materials, increasing the output of material slices per unit length, and improving raw material utilization. Simultaneously, an air-blowing structure is installed inside the roller cutting blades to continuously blow airflow onto the intermediate edge materials during the cutting process, ensuring timely separation of the intermediate edge materials from the blade roller surface. This effectively prevents the intermediate edge materials from adhering to or tangling on the blade roller, preventing material slices from being drawn into the blade roller and causing jamming, material smearing, and other abnormalities, thus ensuring continuous and stable operation of the production line. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a film cutting machine and a roller cutting knife provided in an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Side view of a medium-thickness membrane cutting machine.

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the first negative pressure roller and the roller cutting blade.

[0019] Figure 4 for Figure 1 A cross-sectional schematic diagram of the air blowing structure of the middle roller cutting blade.

[0020] [Explanation of Key Figure Markings] 1: Film cutting machine; 10: First conveying mechanism; 11: First negative pressure roller; 111: First negative pressure suction hole area; 1110: First negative pressure suction hole; 112: First clearance area; 113: Second clearance area; 114: First roller surface; 20: Second conveying mechanism; 21: Second negative pressure roller; 211: Groove; 22: Negative pressure conveyor belt; 221: Belt body; 222: First transmission gear; 223: Second negative pressure suction hole; 30: Roller cutting blade; 301: Roller Roller surface; 3011: First end; 3012: Second end; 302: First cutting blade; 303: Cutting area; 304: Middle edge material area; 305: Side edge material areas; 306: Second cutting blade; 32: Air blowing structure; 321: Air blowing port; 322: Air inlet; 323: Air inlet channel; 40: Waste recycling mechanism; 401: Waste transfer negative pressure roller; 402: Waste collection box; 403: Cleaning component; 50: Material; 51: Material slice. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] It should also be noted that the division of multiple embodiments in this invention is only for the convenience of description and should not constitute a special limitation. Features in various embodiments can be combined and referenced in each other without contradiction.

[0024] In this embodiment, refer to Figure 1 , Figure 3 and Figure 4As shown, this embodiment provides a roller cutter 30, which includes a roller surface 301, a plurality of first cutters 302, a plurality of second cutters 306, and an air blowing structure 32. At least two of the first cutters 302 are arranged adjacent to each other along the axial direction of the roller surface 301, and are spaced apart along the circumferential direction of the roller surface 301, with at least two first cutters 302 forming a group. The roller cutter 30 is used to cut hot melt adhesive patch raw materials into material slices 51 of a preset shape and size.

[0025] Multiple second cutting blades 306 are arranged adjacent to each other in the circumferential direction of the roller surface 301. An intermediate edge material region 304 is formed at the junction of two adjacent first cutting blades 302 and two second cutting blades 306. Multiple first cutting blades 302 and multiple second cutting blades 306 are fixedly mounted on the roller surface 301. The second cutting blades 306 are located at the center of the roller surface 301, and the multiple second cutting blades 306 are arranged in a circle around the roller surface 301 in the circumferential direction, forming a circumferential cutting edge. Multiple first cutting blades 302 extend along the axial direction of the roller surface 301. The axial arrangement can be, for example, two first cutting blades 302, three first cutting blades 302, etc., and the axially extending first cutting blades 302 form a group, with each group spaced apart along the circumferential direction of the roller surface 301, forming an axial cutting edge.

[0026] The first cutting blade 302 and the second cutting blade 306 are arranged perpendicularly. An independent intermediate edge material area 304 is formed between the intersections of two adjacent first cutting blades 302 and two adjacent second cutting blades 306 perpendicular to them. Specifically, multiple first cutting blades 302 and multiple second cutting blades 306 enclose multiple cutting areas 303, each cutting area 303 sharing an adjacent edge with its neighbors. This arrangement of adjacent cutting areas 303 sharing a blade eliminates the gaps and redundant edge material width between adjacent units in traditional cutting structures, effectively reducing edge material generation and improving material utilization.

[0027] The optimized arrangement of the first cutting blade 302 and the second cutting blade 306 improves the cutting path, effectively reducing gap loss and edge burrs between the cutting blades. After the material 50 passes through the roller cutting blade 30, it forms multiple independent intermediate edge pieces. Compared with the traditional isolation-type slitting process of the cutting area 303, this effectively reduces the cutting allowance and the width of the invalid edge pieces, avoiding the problems of excessively wide edge pieces and large amounts of waste in the traditional isolation slitting method. This effectively reduces edge piece loss, improves raw material utilization, and lowers production costs.

[0028] The air blowing structure 32 includes an air blowing port 321 located in the intermediate edge material area 304. The air blowing port 321 is used to connect to an external air source to blow away the intermediate edge material located in the intermediate edge material area 304. By positioning the air blowing port 321 corresponding to the intermediate edge material area 304, the intermediate edge material can be directly and directionally blown away from the roller surface 301, preventing the generated intermediate edge material from adhering to the roller cutting blade 30 and ensuring a continuous and stable cutting process. Using a fixed-point air blowing method, the intermediate edge material generated during cutting can be removed promptly, preventing edge material accumulation, entanglement, or mixing into the finished product, thus improving the yield of the finished patch. The air blowing structure 32 works in conjunction with the intermediate edge material area 304, eliminating the need for an additional complex waste removal mechanism; the structure is simple and responds quickly.

[0029] Reference Figure 3 and Figure 4 As shown, in some embodiments, the air blowing structure 32 further includes an air inlet 322 and an air inlet channel 323. The air inlet 322 is located at one end of the roller cutter 30 along its length. The air inlet channel 323 is located inside the roller cutter 30 and extends along its length, communicating with the air inlet 322 and the air blowing port 321. An external air source enters the air inlet channel 323 through the air inlet 322 and is then output to the intermediate edge material area 304 through the air blowing port 321, thereby blowing off the intermediate edge material.

[0030] The air inlet 322 is located at the end of the roller cutter 30 along its length, facilitating quick connection with an external air source. The air inlet channel 323 is built into the roller cutter 30 and extends along its length, resulting in a short airflow transmission path, stable pressure, and low loss. This ensures that the air outlet 321 outputs a stable and reliable blowing force, guaranteeing that the middle edge material is blown off in a timely manner.

[0031] On the other hand, refer to Figure 1 , Figure 2 and Figure 3 As shown, this embodiment of the invention provides a film cutting machine 1, including a roller cutter 30 as described above. The film cutting machine 1 also includes a first conveying mechanism 10, a second conveying mechanism 20, and a waste recycling mechanism 40. The roller cutter 30 is located below and adjacent to the first conveying mechanism 10. The second conveying mechanism 20 is located adjacent to the first conveying mechanism 10 in a first direction. The waste recycling mechanism 40 is located below the second conveying mechanism 20.

[0032] Material 50 is conveyed along a first direction between the first conveying mechanism 10 and the roller cutter 30. The material 50 is cut by the roller cutter 30 to form material slices 51. The material slices 51 pass sequentially through the first conveying mechanism 10 to the side of the second conveying mechanism 20 away from the waste recycling mechanism 40. Simultaneously, intermediate edge material is formed during the cutting process of the roller cutter 30 to form the material slices 51. The waste recycling mechanism 40 collects this intermediate edge material.

[0033] The waste recycling mechanism 40 includes a waste transfer negative pressure roller 401 and a waste collection box 402. The waste transfer negative pressure roller 401 is arranged adjacent to the roller cutter 30 in a first direction and corresponds to the middle edge material area 304. The roller cutter 30 rotates in the opposite direction to the waste transfer negative pressure roller 401. The waste collection box 402 is located below the waste transfer negative pressure roller 401.

[0034] During the cutting process, intermediate edge material is continuously formed. The air blowing structure 32 continuously blows off the intermediate edge material. At this time, the waste transfer negative pressure roller 401 adsorbs and transfers the blown-off intermediate edge material and collects it in the waste collection box 402. Through the cooperation of the air blowing structure 32 and the waste transfer negative pressure roller 401, the intermediate edge material can be blown off, stably adsorbed, and directionally transferred in real time during cutting, avoiding the intermediate edge material from adhering, accumulating, or entangled on the cutting parts, and ensuring the continuous and stable cutting process. The entire process of intermediate edge material blowing off, transferring, and collecting is completed automatically without manual intervention, effectively improving waste treatment efficiency and enhancing the operational reliability and production continuity of the film cutting machine 1.

[0035] Reference Figure 1 and Figure 2 As shown, in some embodiments, the waste recycling mechanism 40 further includes a cleaning component 403, which is disposed on the side of the waste transfer negative pressure roller 401 away from the roller cutting blade 30 in the first direction, and the cleaning component 403 abuts against the waste transfer negative pressure roller 401. For example, the cleaning component 403 may be a wool brush. By providing a cleaning component 403 abutting against one side of the waste transfer negative pressure roller 401, the intermediate edge material adsorbed on the roller surface of the waste transfer negative pressure roller 401 can be scraped and cleaned in a timely manner during the rotation of the waste transfer negative pressure roller 401, preventing the intermediate edge material from continuously adhering to the surface of the negative pressure roller and forming an accumulation. The close contact between the cleaning component 403 and the negative pressure roller ensures that the intermediate edge material is peeled off and falls into the waste collection box 402, further improving the reliability and stability of waste recycling, ensuring long-term continuous operation of the equipment, and improving overall cutting quality and production efficiency.

[0036] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the first conveying mechanism 10 includes a first negative pressure roller 11. The second conveying mechanism 20 includes a second negative pressure roller 21, which rotates in the opposite direction to the first negative pressure roller 11. The first negative pressure roller 11 is used to adsorb and convey material. A roller cutter 30 is used to slice the material into material slices 51 when the material is between the first conveying mechanism 10 and the roller cutter 30. The second negative pressure roller 21 is used to receive and convey the material slices 51 when they are between the first negative pressure roller 11 and the second conveying mechanism 20.

[0037] The use of a counter-rotating first negative pressure roller 11 and second negative pressure roller 21 ensures a smooth transition and precise receiving of the material slice 51 after its formation, preventing offset, wrinkling, or pulling during transport and guaranteeing accurate slice positioning and stable conveying. Furthermore, the use of negative pressure adsorption to fix and transport the material 50 and the material slice 51 keeps the material 50 flat and taut during cutting, effectively improving cutting accuracy and ensuring uniform slice size and neat edges, thus enhancing finished product quality. Through a two-stage negative pressure adsorption and directional conveying process, problems such as jamming, deviation, or being caught in the cutting blade during medicated patch transport are avoided, effectively improving the stability and reliability of the medicated patch film cutting process and ensuring continuous and efficient operation of the production line.

[0038] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the roller surface 301 includes a first end 3011 and a second end 3012 opposite to each other along its length direction, and a cutting area 303 forms two side edge material areas 305 between the first end 3011 and the second end 3012. The first negative pressure roller 11 is provided with a first negative pressure suction hole area 111, which corresponds to the cutting area 303. The first negative pressure suction hole area 111 includes a plurality of first negative pressure suction holes 1110, which are spaced apart to form a first clearance area 112, and the middle edge material area 304 corresponds to the first clearance area 112. The first negative pressure roller 11 includes a first roller surface 114, which includes a third end and a fourth end opposite to each other along its length direction, and a second clearance area 113 is formed between the first negative pressure suction hole area 111 and the third and fourth ends, which corresponds to the two side edge material areas 305.

[0039] By setting a first negative pressure suction hole area 111 on the first negative pressure roller 11 corresponding to the cutting area 303, the cut material slices 51 can be stably adsorbed, ensuring that the material slices 51 are flat, do not shift, and do not wrinkle during the conveying process. The first avoidance area 112 corresponds to the middle edge material area 304, and the second avoidance area 113 corresponds to the two side edge material areas 305, so that the negative pressure adsorption only acts on the cutting area 303 of the material 50, and does not adsorb the middle and side edge materials, avoiding the edge materials being sucked by the negative pressure and unable to fall off normally. Structurally, this ensures that the edge materials can be separated smoothly. This avoidance adsorption design effectively avoids edge material adhesion and jamming, effectively improves the smoothness and stability of the patch during the cutting and transfer process, and ensures the continuous and reliable operation of the high-speed production line.

[0040] Reference Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the second negative pressure roller 21 is provided with multiple sets of negative pressure suction holes, which are spaced apart along the length of the second negative pressure roller 21, and each set of negative pressure suction holes includes multiple second negative pressure suction holes 223, which are spaced apart along the circumference of the second negative pressure roller 21.

[0041] Multiple sets of negative pressure suction holes form a uniformly distributed negative pressure adsorption area, which can accurately correspond to the cut material slices 51, achieving stable adsorption and reliable reception of the material slices 51, and preventing the material slices 51 from shifting, wrinkling or falling off during the transfer process. The second negative pressure suction holes 223, which are arranged circumferentially, can cooperate with the rotation of the second negative pressure roller 21 to achieve continuous and uninterrupted adsorption and conveying, adapting to the cycle time requirements of high-speed production lines and ensuring a smooth transition of the material slices 51 from the first negative pressure roller 11 to the second negative pressure roller 21.

[0042] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the second conveying mechanism 20 further includes a negative pressure conveyor belt 22, which comprises multiple belt bodies 221. The second negative pressure roller 21 is provided with multiple grooves 211, which are located between two adjacent sets of negative pressure suction holes. The multiple belt bodies 221 are located within the multiple grooves 211, and the second negative pressure roller 21 drives the multiple belt bodies 221 to move.

[0043] The groove 211 on the second negative pressure roller 21 cooperates with the belt body 221 of the negative pressure conveyor belt 22. The belt body 221 is embedded in the groove 211, which does not affect the adsorption effect of the negative pressure suction hole, and can drive the belt body 221 to move stably through the rotation of the second negative pressure roller 21, so as to realize the synchronous conveying of the material slices 51. Multiple belt bodies 221 are arranged at intervals, which can provide multi-point support and conveying of the medicated patch slices, ensuring uniform force during the conveying process, avoiding the material slices 51 from shifting or wrinkling, and further improving the stability of the transfer. At the same time, the cooperation structure between the groove 211 and the belt body 221 is compact and does not occupy extra space, which is suitable for the operation requirements of high-speed production lines. It works in conjunction with the negative pressure suction hole to improve the whole-process negative pressure transfer system and ensure the smooth connection of the medicated patch from cutting to stacking.

[0044] Material 50 is conveyed along the first direction to the space between the roller cutter 30 and the first negative pressure roller 11. The material 50 is cut by the roller cutter 30 to form multiple material slices 51 and multiple intermediate edge pieces. The first negative pressure roller 11 adsorbs the material slices 51 and transfers them. The air blowing structure 32 in the roller cutter 30 blows off the intermediate edge pieces, which are then adsorbed and transferred by the waste transfer negative pressure roller 401. The cleaning component 403 cleans the intermediate edge pieces adsorbed on the waste transfer negative pressure roller 401, causing them to fall into the waste collection box 402. The second negative pressure roller 21 and the negative pressure conveyor belt 22 adsorb the material slices 51 located on the first negative pressure roller 11, causing the material slices 51 to be adsorbed onto the negative pressure conveyor belt 22. The negative pressure conveyor belt 22 then transfers the material slices 51 to the subsequent work station.

[0045] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the belt body 221 is provided with a first drive tooth 222, which is located on the side of the belt body 221 facing the second negative pressure roller 21. A second drive tooth is provided in the groove 211, and the first drive tooth 222 meshes with the second drive tooth. A plurality of second negative pressure suction holes 223 are spaced apart along the length of the belt body 221.

[0046] The first transmission tooth 222 on the belt body 221 meshes with the second transmission tooth in the groove 211, enabling synchronous transmission between the second negative pressure roller 21 and the belt body 221. This prevents slippage between the belt body 221 and the second negative pressure roller 21, ensuring a stable and consistent conveying speed and further improving the accuracy of material slice 51 transfer. Multiple second negative pressure suction holes 223 are spaced along the length of the belt body 221 and can move synchronously with the belt body 221, achieving uniform adsorption of the medicated patch slices throughout the entire process. This prevents the medicated patch slices from falling off or shifting during transport. Simultaneously, the stable transmission with the meshing teeth further optimizes the transfer path, effectively avoiding problems such as material jamming and entanglement with the cutting blade, balancing smooth transfer and finished product quality.

[0047] It is understood that the foregoing embodiments are merely illustrative examples of the present invention. Provided that the technical features do not conflict, the structure is not contradictory, and the purpose of the invention is not violated, the technical solutions of the various embodiments can be arbitrarily combined and used.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roller cutter, characterized in that, include: Roller surface; Multiple first cutting blades, at least two of which are arranged adjacent to each other along the axial direction of the roller surface, and at least two of which are arranged as a group, are spaced apart along the circumferential direction of the roller surface. Multiple second cutting blades are arranged adjacent to each other in sequence along the circumferential direction of the roller surface; an intermediate edge material area is formed at the junction of two adjacent first cutting blades and two second cutting blades; An air blowing structure includes an air blowing port located in the middle edge material area; The air inlet is used to connect to an external air source to blow off the middle edge material located in the middle edge material area.

2. The roller cutter according to claim 1, characterized in that, Multiple first cutting blades and multiple second cutting blades enclose multiple cutting areas, and each cutting area shares an adjacent side with the adjacent cutting areas.

3. The roller cutter according to claim 2, characterized in that, The air blowing structure also includes: An air inlet is located at one end of the roller cutter along its length. An air intake channel is located inside the roller cutting blade and extends along its length. The air intake channel is connected to the air inlet and the air outlet.

4. A film cutting machine, characterized in that, The film cutting machine includes the roller cutter as described in any one of claims 1 to 3; the film cutting machine further includes: The first conveying mechanism, wherein the roller cutting blade is located below and adjacent to the first conveying mechanism; The second conveying mechanism is disposed adjacent to the first conveying mechanism in the first direction; The waste recycling mechanism is located below the second conveying mechanism; the waste recycling mechanism includes: The waste transfer negative pressure roller is arranged adjacent to the roller cutting blade in the first direction and corresponds to the middle edge material area. The roller cutting blade rotates in the opposite direction to the waste transfer negative pressure roller. A waste collection box is located below the waste transfer negative pressure roller.

5. The film cutting machine according to claim 4, characterized in that, The waste recycling mechanism further includes a cleaning component, which is disposed on the side of the waste transfer negative pressure roller away from the roller cutting blade in the first direction, and the cleaning component abuts against the waste transfer negative pressure roller.

6. The film cutting machine according to claim 4, characterized in that, The first conveying mechanism includes a first negative pressure roller; the second conveying mechanism includes a second negative pressure roller, the second negative pressure roller rotating in the opposite direction to the first negative pressure roller; The first negative pressure roller is used to adsorb and convey materials; the roller cutter is used to slice the materials to form material slices when the materials are between the first conveying mechanism and the roller cutter; the second negative pressure roller is used to receive and convey the material slices when the material slices are between the first negative pressure roller and the second conveying mechanism.

7. The film cutting machine according to claim 6, characterized in that, The roller surface includes a first end and a second end opposite to each other along its length, and the cutting area forms two side edge areas between the first end and the second end; the first negative pressure roller is provided with: The first negative pressure suction hole area corresponds to the cutting area; the first negative pressure suction hole area includes a plurality of first negative pressure suction holes, the plurality of first negative pressure suction holes are spaced apart to form a first clearance area, and the middle edge material area corresponds to the first clearance area; The first negative pressure roller includes a first roller surface, the first roller surface includes a third end and a fourth end opposite to each other along its length direction, a second clearance area is formed between the first negative pressure suction hole area and the third end and the fourth end, and the second clearance area corresponds to the two side edge material areas.

8. The film cutting machine according to claim 6, characterized in that, The second negative pressure roller is provided with multiple sets of negative pressure suction holes, which are spaced apart along the length of the second negative pressure roller. Each set of negative pressure suction holes includes multiple second negative pressure suction holes, which are spaced apart along the circumference of the second negative pressure roller.

9. The film cutting machine according to claim 8, characterized in that, The second conveying mechanism also includes a negative pressure conveyor belt, which comprises multiple belt bodies; The second negative pressure roller is provided with multiple grooves, which are located between two adjacent sets of negative pressure suction holes; multiple belts are located in the multiple grooves, and the second negative pressure roller drives the multiple belts to move.

10. The film cutting machine according to claim 9, characterized in that, The belt is provided with: A first transmission tooth is provided on the side of the belt facing the second negative pressure roller; a second transmission tooth is provided in the groove, and the first transmission tooth meshes with the second transmission tooth; Multiple second negative pressure suction holes are spaced apart along the length of the belt.

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