Circular knife film cutting machine with waste recovery device

By designing the adhesive mechanism and poking component in the circular knife film cutting machine, the problem of difficult separation between waste and profile is solved, automatic recycling and reuse of waste is realized, and die-cutting efficiency is improved.

CN119910728APending Publication Date: 2025-05-02苏州市融合晟精密科技有限公司
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Patent Information

Application Number
CN202411234063.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-04
Publication Date
2025-05-02

AI Technical Summary

Technical Problem

During the waste recycling process of existing round knife film cutting machines, it is difficult to effectively remove waste from the profile by relying on suction or gravity, resulting in a decrease in die-cutting efficiency and needs to be removed manually.

Method used

A circular knife film cutting machine with a waste recycling device is designed. The adhesive mechanism uses a press roller to adhere the waste from the profile to the adhesive tape, and further ensures the removal of the waste through the poking assembly and scraping parts, realizing automatic recycling.

Benefits of technology

It effectively solves the problem of difficult to separate the adhesion between waste and profile, improves die-cutting efficiency, reduces manual intervention, and realizes automatic recycling and reuse of waste.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a circular knife film cutting machine with a waste recovery device, and relates to the technical field of circular knife film cutting machines. A circular knife film cutting machine with a waste recovery device comprises a mounting base, and an unwinding mechanism used for unwinding a sectional material, a die cutting mechanism used for cutting waste on the sectional material and a winding mechanism used for winding the sectional material are sequentially arranged on the mounting base. A material sticking mechanism is arranged on the mounting seat; the material adhering mechanism comprises a material discharging assembly which is arranged on a mounting base and used for unwinding an adhering belt and a material collecting assembly used for winding the adhering belt, a first pressing roller and a second pressing roller which are adjacent to each other are rotationally connected to the side, close to the winding mechanism, of the die cutting mechanism on the mounting base, and a material conveying gap used for allowing a sectional material and the adhering belt to pass through is formed between the first pressing roller and the second pressing roller; the first pressing roller and the second pressing roller are used for pressing the sectional materials with the waste materials on the adhesive tape so that the adhesive tape can adhere the waste materials. According to the die cutting device, waste can be conveniently separated from a profile, and thus the die cutting efficiency is guaranteed.
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Description

Technical Field

[0001] The present application relates to the technical field of circular knife film cutting machines, and in particular to a circular knife film cutting machine with a waste recovery device. Background Art

[0002] Multi-station rotary die-cutting machine is referred to as rotary machine, commonly known as round knife machine, rolling knife machine or round knife film cutting machine. It can continuously rotate and die-cut in the form of a rolling knife. It is one of the most efficient equipment in die-cutting machines. The die-cut products are widely used in mobile phones, computers, LCD monitors, digital cameras and LCD backlight manufacturing.

[0003] The common type of circular knife film cutting machine usually includes a die-cutting mechanism, which includes a knife roller and a cushion roller arranged adjacent to each other. The purpose of die-cutting is achieved by passing the profile to be cut between the knife roller and the cushion roller, and the cushion roller squeezes the profile to contact the knife roller.

[0004] In order to improve the die-cutting efficiency, the profiles to be cut are usually placed on the film in an orderly manner, and continuous and efficient die-cutting is performed by continuously conveying the film.

[0005] In the actual production process, for environmental protection, the waste cut by the film cutting machine is usually recycled and reused. Currently, a suction piece is set under the film. The cut waste falls under the action of natural gravity or the suction of the suction piece and is absorbed by the suction piece for unified collection.

[0006] Relying on suction or gravity to make the waste fall off the profile is not reliable. Some waste may stick to the profile and be difficult to fall off. The waste that does not fall off the profile requires workers to stop the die-cutting process and remove it manually, which will affect the die-cutting efficiency. Summary of the invention

[0007] In order to facilitate the separation of waste materials from the profile and thus ensure die-cutting efficiency, the present application provides a circular knife film cutting machine with a waste material recovery device.

[0008] The circular knife film cutting machine with a waste recovery device provided in this application adopts the following technical solution: A circular knife film cutting machine with a waste material recovery device comprises a mounting seat, on which an unwinding mechanism for unwinding a profile, a die-cutting mechanism for cutting out waste materials on the profile, and a winding mechanism for winding the profile are sequentially arranged; a bonding mechanism is arranged on the mounting seat; The bonding mechanism includes a material unwinding component for unwinding the adhesive tape and a material receiving component for winding the adhesive tape on a mounting seat, and the mounting seat is rotatably connected with adjacent pressure rollers 1 and 2 on one side of the die-cutting mechanism close to the winding mechanism, and a material feeding gap for the profile and the adhesive tape to pass through is formed between the pressure rollers 1 and 2, and the pressure rollers 1 and 2 are used to press the profile with waste material onto the adhesive tape so that the adhesive tape sticks to the waste material.

[0009] By adopting the above technical solution, the profile is moved by unwinding the profile by the unwinding mechanism and rewinding the profile by the rewinding mechanism, and the die-cutting mechanism will die-cut the moving profile to cut out waste on the profile, and then the die-cut profile and the adhesive tape will be squeezed through the pressure roller 1 and the pressure roller 2 at the same time, and the adhesive tape will stick to the waste so that the waste and the profile are separated. The application can easily separate the waste from the profile to ensure the die-cutting efficiency.

[0010] Preferably, the mounting seat is also rotatably connected to a tensioning roller 1 for guiding and tensioning the profile, the tensioning roller 1 is located on the side of the feeding gap close to the winding mechanism, and the tensioning roller 1 is used to guide the profile passing through the feeding gap to move obliquely upward; the mounting seat is also rotatably connected to a tensioning roller 2 located below the tensioning roller 1, the tensioning roller 2 is used to guide the adhesive tape passing through the feeding gap to move horizontally and is located below the profile that moves obliquely.

[0011] By adopting the above technical solution, if the waste is not completely adhered by the adhesive tape, the waste may fall onto the adhesive tape under the action of gravity when the profile carrying the waste moves upward at an angle.

[0012] Preferably, the mounting seat is further provided with a material poking assembly, the material poking assembly is located above the profile that is in tilting motion, and the material poking assembly is configured to be able to poke off waste materials on the profile.

[0013] Preferably, the material poking assembly includes a mounting roller rotatably connected to a mounting seat, the mounting roller is connected to a driving member for driving the mounting roller to rotate; a protrusion for poking out waste materials is provided on an outer wall of the mounting roller.

[0014] By adopting the above technical solution, the driving member can drive the installation roller to rotate so that the protrusion contacts the moving profile. At this time, the position of the moving profile after die-cutting will be poked by the material, so that the waste material falls off.

[0015] Preferably, the mounting seat is provided with a fixing frame, the fixing frame is provided with an adjustment component, the adjustment component is connected with a scraper, the scraper is used to scrape off waste materials on the adhesive tape, and the adjustment component is used to adjust the position of the scraper relative to the adhesive tape.

[0016] By adopting the above technical solution, as the adhesive tape moves, the scraper will scrape off the waste material on the adhesive tape for recycling; the adjustment component can adjust the position of the scraper.

[0017] Preferably, the mounting seat is also rotatably connected to a guide roller, the guide roller is located below the tensioning roller 2, and the guide roller is used to guide the adhesive belt passing through the tensioning roller 2 to move obliquely downward; the scraper is used to scrape the adhesive belt moving obliquely downward, and a collection box is provided on the mounting seat below the scraper.

[0018] By adopting the above technical solution, the scraped waste will directly fall into the collection box and be collected.

[0019] Preferably, the die-cutting mechanism includes a fixed seat arranged on the mounting seat, a cushion roller is rotatably connected to the fixed seat, a connecting block is also slidably connected to the fixed seat, a knife roller is rotatably connected to the connecting block, a pressing and cutting gap for the profile to pass through is formed between the knife roller and the cushion roller, a power piece 1 and a power piece 2 are also provided on the fixed seat, the power piece 1 is connected to the knife roller, and the power piece 2 is connected to the cushion roller; the fixed seat is also provided with an adjustment component connected to the connecting block, and the adjustment component is configured to be able to drive the connecting block to move, thereby driving the knife roller to move to adjust the size of the pressing and cutting gap.

[0020] By adopting the above technical solution, when the profile passes through the pressing and cutting gap, the profile will be squeezed to contact the knife roller and the cushion roller to complete the die cutting; the positioning component can drive the knife roller to move to adjust the size of the pressing and cutting gap.

[0021] Preferably, the positioning assembly includes a connecting rod, a connecting hole is opened on the fixing seat, the connecting rod is inserted into the connecting hole, and the connecting rod is threadedly connected to the fixing seat through the connecting hole; one end of the connecting rod is connected to the connecting block, and the other end of the connecting rod is provided with a twist cap.

[0022] By adopting the above technical solution, the connecting rod can be driven to move by rotating the twist cap, thereby driving the connecting block to move to adjust the position of the knife roller.

[0023] Preferably, the unwinding mechanism comprises an unwinding roller disposed on a mounting seat, the unwinding roller is rotatably connected to the mounting seat, a driving member is disposed on the mounting seat, and the driving member is connected to the unwinding roller.

[0024] By adopting the above technical solution, after the profile is wound on the unwinding roller in advance, the driving rotating member can drive the unwinding roller to rotate so as to unwind the profile.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The profile is unrolled by the unwinding mechanism and reeled by the reeling mechanism to make the profile move, and the die-cutting mechanism will die-cut the moving profile to cut out the waste material on the profile, and then the die-cut profile and the adhesive tape are squeezed through the pressure roller 1 and the pressure roller 2 at the same time, and the adhesive tape will stick to the waste material to separate the waste material from the profile. This application can facilitate the separation of waste material from the profile to ensure the die-cutting efficiency; 2. If the waste is not completely adhered by the adhesive tape, the waste may fall onto the adhesive tape under the action of gravity when the profile with the waste moves upward at an angle; the driving member can drive the mounting roller to rotate so that the protrusion contacts the moving profile, and the position of the moving profile after die-cutting will be poked by the material, thereby further ensuring that the waste on the profile can be completely removed; 3. As the adhesive tape moves, the scraper will scrape off the waste on the adhesive tape; the scraped waste will directly fall into the collection box and be collected for subsequent recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a circular knife film cutting machine with a waste recovery device in an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of a circular knife film cutting machine with a waste recycling device from another perspective; Figure 3 It is a front view of a circular knife film cutting machine with a waste recycling device; Figure 4 It is a structural diagram used to reflect the die-cutting mechanism.

[0027] Markings in the accompanying drawings: 1. mounting seat; 11. tensioning roller 1; 12. tensioning roller 2; 13. guide roller; 2. unwinding mechanism; 21. unwinding roller; 22. driving member; 3. die-cutting mechanism; 31. fixed seat; 32. cushion roller; 321. matching groove; 33. connecting block; 34. knife roller; 341. cutter; 35. pressing and cutting gap; 36. power member 1; 37. power member 2; 38. adjustment component; 381. connecting rod; 382. connecting hole; 383. twisting cap; 4. winding mechanism; 5. bonding mechanism; 51. unwinding component; 52. collecting component; 53. pressing roller 1; 54. pressing roller 2; 55. feeding gap; 6. poking component; 61. mounting roller; 62. driving member; 63. protrusion; 7. fixing frame; 71. adjustment component; 72. scraping member; 73. collecting box. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] The embodiment of the present application discloses a circular knife film cutting machine with a waste material recovery device, which is used to facilitate the removal of waste materials on profiles.

[0031] Reference Figure 1 A circular knife film cutting machine with a waste material recovery device comprises a mounting seat 1, on which are arranged from right to left a reeling mechanism 2 for reeling a profile, a die-cutting mechanism 3 for cutting out waste materials on the profile, and a reeling mechanism 4 for reeling the profile; a sticking mechanism 5 for sticking off waste materials on the profile is arranged between the die-cutting mechanism 3 and the reeling mechanism 4 on the mounting seat 1. In addition, in order to further ensure that waste materials on the profile can be removed, a poking assembly 6 is arranged on one side of the sticking mechanism 5 on the mounting seat 1, and the poking assembly 6 can poke off waste materials on the profile.

[0032] The profile is made to move by unwinding the profile by the unwinding mechanism 2 and rewinding the profile by the rewinding mechanism 4. At this time, the die-cutting mechanism 3 will die-cut the moving profile to cut out waste materials on the profile. Then, the waste materials are adhered by the bonding mechanism 5 to separate the waste materials from the profile, and the residual waste materials that may be adhered to the profile are poked out by the poking component 6.

[0033] Reference Figure 1 and Figure 2 The unwinding mechanism 2 includes an unwinding roller 21 disposed on the mounting seat 1, the unwinding roller 21 is rotatably connected to the mounting seat 1, and a driving member 22 is disposed on the mounting seat 1, the driving member 22 is a motor, and the driving member 22 is connected to the unwinding roller 21. The structure of the rewinding mechanism 4 is the same as that of the unwinding mechanism 2, so it is not repeated here.

[0034] After the profile is wound on the unwinding roller 21 in advance, the driving member 22 can drive the unwinding roller 21 to rotate so as to unwind the profile.

[0035] Reference Figure 1 and Figure 3The die-cutting mechanism 3 includes a fixed seat 31 arranged on the mounting seat 1, and a cushion roller 32 is rotatably connected to the fixed seat 31. A connecting block 33 is also slidably connected to the fixed seat 31. Both ends of the connecting block 33 are in contact with the fixed seat 31, and a knife roller 34 is rotatably connected to the connecting block 33. The knife roller 34 is located above the cushion roller 32, and the knife roller 34 includes a square cutter 341 on the outer wall, and the cushion roller 32 includes a matching groove 321 on the outer wall for the cutter 341 to cut into. The specific structures of the cutter 341 and the matching groove 321 are the existing technology, and a pressing and cutting gap 35 for the profile to pass through is formed between the knife roller 34 and the cushion roller 32; a power piece 1 36 and a power piece 2 37 are also provided on the fixed seat 31, the power piece 1 36 is connected to the knife roller 34, the power piece 2 37 is connected to the cushion roller 32, and the power piece 1 36 and the power piece 2 37 are both motors. The fixing seat 31 is also provided with a positioning assembly 38 connected to the connecting block 33 . The positioning assembly 38 can drive the connecting block 33 to move up and down, thereby driving the knife roller 34 to move to adjust the size of the pressing and cutting gap 35 .

[0036] When the moving profile passes through the pressing and cutting gap 35, the power member 1 36 and the power member 2 37 drive the knife roller 34 and the cushion roller 32 to move in opposite directions, and the profile will be squeezed to contact the knife roller 34 and the cushion roller 32 to complete the die cutting.

[0037] Reference Figure 4 Specifically, the position adjustment assembly 38 includes a connecting rod 381, a connecting hole 382 is formed on the fixing seat 31, the connecting rod 381 is inserted into the connecting hole 382, ​​and the connecting rod 381 is threadedly connected to the fixing seat 31 through the connecting hole 382; the lower end of the connecting rod 381 is rotatably connected to the connecting block 33, and a screw cap 383 is provided on the connecting rod 381. By rotating the screw cap 383, the connecting rod 381 can be driven to move, thereby driving the connecting block 33 to move to adjust the position of the knife roller 34.

[0038] Reference Figure 3 The adhesive mechanism 5 includes a material unwinding component 51 for unwinding the adhesive tape and a material receiving component 52 for rewinding the adhesive tape, which are provided on the mounting seat 1. The material unwinding component 51 and the material receiving component 52 have the same structure as the unwinding mechanism 2, so they are not described here.

[0039] The movement of the adhesive tape is completed based on the unwinding of the unwinding component 51 and the rewinding of the rewinding component 52.

[0040] Reference Figure 3 The mounting seat 1 is located on the left side of the die-cutting mechanism 3 and is rotatably connected to an adjacent pressure roller 1 53 and a pressure roller 2 54. A material feeding gap 55 is formed between the pressure roller 1 53 and the pressure roller 2 54 for the profile and the adhesive tape to pass through. In the present application, the traveling adhesive tape is located below the traveling profile.

[0041] Reference Figure 3The mounting seat 1 is also rotatably connected to a tensioning roller 11 for guiding and tensioning the profile. The tensioning roller 11 is located above the left side of the feeding gap 55, and the tensioning roller 11 is used to guide the profile passing through the feeding gap 55 to move upward at an angle. The mounting seat 1 is also rotatably connected to a tensioning roller 2 12 located below the tensioning roller 11. The tensioning roller 2 12 is used to guide the adhesive tape passing through the feeding gap 55 to move horizontally and is located below the profile that moves at an angle.

[0042] When the moving profile and the moving adhesive tape pass through the feeding gap 55 at the same time, the pressure roller 1 53 and the pressure roller 2 54 press the profile with waste material onto the adhesive tape so that the adhesive tape sticks to the waste material. Then the moving profile is separated from the moving adhesive tape, and the adhesive tape can stick to the waste material on the profile.

[0043] Reference Figure 2 and Figure 3 The poking assembly 6 includes a mounting roller 61 rotatably connected to the mounting seat 1. The mounting roller 61 is the same size as the knife roller 34. The mounting roller 61 is located above the profile that moves upward obliquely. The mounting roller 61 is connected to a driving member 62 for driving the mounting roller 61 to rotate. The driving member 62 is a motor. A protrusion 63 for poking out waste is provided on the outer wall of the mounting roller 61. The position of the protrusion 63 corresponds to the position of the cutter 341. Figure 4 , the protrusion 63 is slightly smaller than the cutter 341.

[0044] When the profile moves upward at an angle, the driving member 62 drives the mounting roller 61 to rotate, thereby driving the protrusion 63 to press on the die-cut position on the profile and then poke off the waste material that may be adhered.

[0045] Reference Figure 3 In order to facilitate the recycling of waste materials on the adhesive tape, the mounting seat 1 is provided with a fixing frame 7, and the fixing frame 7 is provided with an adjustment component 71. The adjustment component 71 is connected with a scraper 72, and the scraper 72 is used to scrape off the waste materials on the adhesive tape. The adjustment component 71 is used to adjust the position of the scraper 72 relative to the adhesive tape. Among them, the scraper 72 is arranged upward from right to left, and the structure of the adjustment component 71 is the same as that of the positioning component 38, so it is not repeated here. Specifically, in order to ensure that the waste materials on the adhesive tape fall upward, the mounting seat 1 is also rotatably connected with a guide roller 13, which is located at the lower right of the tensioning roller 12, and the guide roller 13 is used to guide the adhesive tape passing through the tensioning roller 12 to move obliquely downward; the mounting seat 1 is provided with a collection box 73 with an opening facing upward below the scraper 72.

[0046] When the adhesive tape moves obliquely toward the lower right, the scraper 72 scrapes off the waste materials, and the waste materials fall into the collection box 73.

[0047] The implementation principle of a circular knife film cutting machine with a waste recovery device in the embodiment of the present application is: After the profile is pre-wound on the unwinding roller 21, the driving member 22 drives the unwinding roller 21 to rotate so as to unwind the profile, and the winding mechanism 4 is used to wind the profile to realize the movement of the profile; The adhesive tape is pre-wound on the unwinding assembly 51, and the unwinding assembly 51 and the receiving assembly 52 are used to complete the movement of the adhesive tape; When the moving profile passes through the pressing and cutting gap 35, the power member 1 36 and the power member 2 37 drive the knife roller 34 and the cushion roller 32 to move in opposite directions, and the profile is pressed to contact the knife roller 34 and the cushion roller 32 to complete the die cutting; Then the moving profile and the moving adhesive tape pass through the material gap 55 at the same time, and the pressure roller 1 53 and the pressure roller 2 54 press the profile with the waste material onto the adhesive tape so that the adhesive tape sticks to the waste material, and then the moving profile is separated from the moving adhesive tape, and the adhesive tape can stick to the waste material on the profile; Afterwards, when the profile moves upward at an angle, the driving member 62 drives the mounting roller 61 to rotate, thereby driving the protrusion 63 to press on the die-cut position on the profile and then poke off the waste that may be stuck; and when the adhesive tape moves toward the lower right at an angle, the scraper 72 scrapes off the waste, and the waste will fall into the collection box 73.

[0048] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A circular knife film cutting machine with a waste recovery device, characterized in that: The invention comprises a mounting seat (1), on which a reeling mechanism (2) for reeling out a profile, a die-cutting mechanism (3) for cutting out waste material from the profile, and a reeling mechanism (4) for reeling in the profile are sequentially arranged; and a material gluing mechanism (5) is arranged on the mounting seat (1); The bonding mechanism (5) comprises a material unwinding component (51) for unwinding the adhesive tape and a material receiving component (52) for rewinding the adhesive tape, which are arranged on a mounting seat (1); a first pressing roller (53) and a second pressing roller (54) are rotatably connected to each other on one side of the die-cutting mechanism (3) close to the rewinding mechanism (4); a material feeding gap (55) for the profile and the adhesive tape to pass through is formed between the first pressing roller (53) and the second pressing roller (54); the first pressing roller (53) and the second pressing roller (54) are used to press the profile with waste material onto the adhesive tape so that the adhesive tape adheres to the waste material.

2. The circular knife film cutting machine with a waste recovery device according to claim 1, characterized in that: The mounting seat (1) is also rotatably connected to a tensioning roller (11) for guiding and tensioning the profile, the tensioning roller (11) being located on the side of the feeding gap (55) close to the winding mechanism (4), and the tensioning roller (11) being used to guide the profile passing through the feeding gap (55) to move obliquely upward; the mounting seat (1) is also rotatably connected to a tensioning roller (12) below the tensioning roller (11), and the tensioning roller (12) is used to guide the adhesive tape passing through the feeding gap (55) to move horizontally and is located below the profile that moves obliquely.

3. The circular knife film cutting machine with a waste recovery device according to claim 2, characterized in that: The mounting seat (1) is also provided with a material poking assembly (6), the material poking assembly (6) is located above the tilting profile, and the material poking assembly (6) is configured to be able to poke off waste material on the profile.

4. The circular knife film cutting machine with a waste recovery device according to claim 3, characterized in that: The material poking assembly (6) comprises a mounting roller (61) rotatably connected to a mounting seat (1), wherein the mounting roller (61) is connected to a driving member (62) for driving the mounting roller (61) to rotate; and a protrusion (63) for poking out waste material is provided on an outer wall of the mounting roller (61).

5. The circular knife film cutting machine with a waste recovery device according to claim 2, characterized in that: The mounting seat (1) is provided with a fixing frame (7), the fixing frame (7) is provided with an adjustment component (71), the adjustment component (71) is connected with a scraper (72), the scraper (72) is used to scrape off waste material on the adhesive tape, and the adjustment component (71) is used to adjust the position of the scraper (72) relative to the adhesive tape.

6. The circular knife film cutting machine with a waste recovery device according to claim 5, characterized in that: The mounting seat (1) is also rotatably connected to a guide roller (13), the guide roller (13) being located below the second tensioning roller (12), and the guide roller (13) being used to guide the adhesive tape passing through the second tensioning roller (12) to move obliquely downward; the scraper (72) is used to scrape the adhesive tape moving obliquely downward, and a collection box (73) is provided on the mounting seat (1) below the scraper (72).

7. The circular knife film cutting machine with a waste recovery device according to claim 1, characterized in that: The die-cutting mechanism (3) comprises a fixed seat (31) arranged on the mounting seat (1), a cushion roller (32) being rotatably connected to the fixed seat (31), a connecting block (33) being slidably connected to the fixed seat (31), a knife roller (34) being rotatably connected to the connecting block (33), a pressing and cutting gap (35) for the profile to pass through being formed between the knife roller (34) and the cushion roller (32), a power piece 1 (36) and a power piece 2 (37) being also arranged on the fixed seat (31), the power piece 1 (36) being connected to the knife roller (34), and the power piece 2 (37) being connected to the cushion roller (32); and a positioning assembly (38) being connected to the connecting block (33), the positioning assembly (38) being configured to be able to drive the connecting block (33) to move, thereby driving the knife roller (34) to move, so as to adjust the size of the pressing and cutting gap (35).

8. The circular knife film cutting machine with a waste recovery device according to claim 7, characterized in that: The positioning assembly (38) comprises a connecting rod (381), a connecting hole (382) is formed on the fixing seat (31), the connecting rod (381) is inserted into the connecting hole (382), and the connecting rod (381) is threadedly connected to the fixing seat (31) through the connecting hole (382); one end of the connecting rod (381) is rotatably connected to the connecting block (33), and the other end of the connecting rod (381) is provided with a twist cap (383).

9. The circular knife film cutting machine with a waste recovery device according to claim 1, characterized in that: The unwinding mechanism (2) comprises an unwinding roller (21) arranged on the mounting seat (1), the unwinding roller (21) being rotatably connected to the mounting seat (1), and a driving member (22) being arranged on the mounting seat (1), and the driving member (22) being connected to the unwinding roller (21).