Rotary slitting and heat sealing apparatus with cleaning device and method of use

Abstract

The present application relates to a kind of rotary slitting hot sealing equipment with cleaning device and its use method.The equipment includes rack, and rack is equipped with movable frame and movable frame driving mechanism.Movable frame is equipped with rotating roller and rotating roller driving mechanism, and two hot cutters are symmetrically arranged on rotating roller, each hot cutter has the working position of turning to below and the cleaning position of turning to above.Movable frame is equipped with cleaning device and cleaning device driving mechanism.Cleaning device includes shell, and inductive coil is arranged in shell, and cold air pipe is arranged in shell.Heating is carried out to the hot cutter by inductive coil first, so that plastic adhesive material adhered to the surface of blade is heated and softened, then rapid cooling is carried out, so that the softened plastic adhesive material is rapidly shrunk to produce internal stress and is stripped off and falls, and the plastic adhesive material that falls is sucked away and collected by air extraction pipe.The technical problem that scraper and hot cutter need to contact and scratch back and forth, so that scraper and other components are prone to damage, need to be replaced or repaired frequently and affect production efficiency is reduced.

Description

Technical Field

[0001] This invention relates to the field of plastic slitting and heat sealing technology, specifically to a rotary slitting and heat sealing device with a cleaning apparatus and its usage method. Background Technology

[0002] In the bag-making process, plastic film requires heat sealing and slitting. Two heat-sealing blades are used to heat-seal the double-layer film, and a hot-cutting blade located between the two heat-sealing blades is used for cutting. The hot-cutting blade is in direct contact with the plastic film. Due to inaccurate temperature control of the hot-cutting blade, abnormal conditions such as overheating can occur. In this case, some of the plastic film in contact with the hot-cutting blade will melt and stick to the blade. After the hot-cutting blade cools down, these plastic clumps stuck to the blade will harden, causing material adhesion problems during the next cut, and even leading to burrs and stringing on the cut edges of the film. Moreover, these hardened spots tend to adhere to the wedge-shaped surface of the hot-cutting blade.

[0003] The applicant's earlier Chinese invention patent application CN 114055854 B discloses a film slitting and heat-sealing device. This device includes a frame, a mounting block on the frame, a first and a second heat-sealing blade mounted on the mounting block, and a through groove on the mounting block containing a heat-cutting blade. Elastically mounted scrapers are located on the inner wall of the through groove on both sides of the heat-cutting blade. The heat-sealing blade heat-seales the film below, while the heat-cutting blade heat-cuts and heat-seales the double-layer film at the cut. During the up-and-down movement of the heat-sealing blade, under the action of a torsion spring, each scraper can contact the corresponding wedge-shaped surface of the blade head to scrape off any foreign matter adhering to it. This ensures that the blade head is clean and free of foreign matter each time the heat-sealing blade makes a downward cut, guaranteeing the cutting quality after each cut.

[0004] However, in actual use, the slitting and heat-sealing equipment with the above-mentioned structure suffers from damage to the scraper or torsion spring due to the back-and-forth contact and friction between the scraper and the hot cutting blade. This necessitates frequent downtime for replacement or repair, impacting production efficiency. Therefore, a new type of slitting and heat-sealing mechanism is needed to solve the aforementioned technical problem of frequent downtime for replacement or repair of scraper and other components, which affects production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary slitting and heat sealing device with a cleaning device to solve the technical problem in the prior art where the scraper and other parts are easily damaged due to the back-and-forth contact and scraping between the scraper and the hot cutting blade, requiring frequent downtime for replacement or maintenance, which affects production efficiency; at the same time, the purpose of this invention is also to provide a method of using the above-mentioned device.

[0006] To achieve the above objectives, the present invention provides a rotary slitting and heat-sealing device with a cleaning device, comprising a frame on which heat-sealing blades are mounted. A movable frame is movably arranged on the frame in the vertical direction. A movable frame drive mechanism is provided on the frame. A rotating roller and a rotating roller drive mechanism are provided on the movable frame. Two hot cutting blades are symmetrically arranged on the rotating roller. Each hot cutting blade has a working position that rotates to the lower position and a cleaning position that rotates to the upper position. A cleaning device is movably arranged on the movable frame above the rotating roller in the vertical direction. A cleaning device drive mechanism is provided on the movable frame. The cleaning device includes a housing for covering the outside of the hot cutting blade at the cleaning position. An induction coil is installed inside the housing to inductively heat the blade of the hot cutting blade, causing the plastic adhesive on the blade surface to soften. A cold air pipe is installed inside the housing to blow cold air to the hot cutting blade to force cooling the blade surface. Due to the difference in thermal expansion coefficients between the plastic adhesive and the hot cutting blade, the softened residue generates internal stress due to contraction, thereby cracking and peeling off from the hot cutting blade. The cleaning device has a heating position and a cooling position that are driven up and down by a cleaning device drive mechanism; when the housing is in the heating position, the induction coil inside the housing is aligned with the blade of the hot cutting knife; when the housing is in the cooling position, the cold air pipe inside the housing is aligned with the blade of the hot cutting knife; when the housing is in the cooling position, the lower end face of the housing contacts the outer surface of the rotating roller to form a closed cavity, preventing the fallen plastic adhesive from falling out of the cavity; the housing is equipped with an exhaust pipe for sucking up and collecting the fallen plastic adhesive.

[0007] The heating time of the induction coil is 0.3s to 0.8s, the heating rate is 50℃ / s to 100℃ / s, and the peak heating temperature is 80℃ to 150℃; the temperature of the cooling gas blown by the cold air duct is -5℃ to 10℃, the pressure of the cooling gas blown by the cold air duct is 0.4 MPa to 1.4 MPa, the cooling time is 0.5s to 1.5s, and the cooling rate of the blade surface is 30℃ / s to 80℃ / s.

[0008] The frame is symmetrically provided with vertical guide grooves, and the movable frame is provided with guide blocks that cooperate with the vertical guide grooves to move up and down.

[0009] The exhaust pipe is a flexible hose, which is connected to a dust collection box.

[0010] The exhaust duct includes a rigid pipe connected to the housing and a flexible or corrugated pipe connected to the rigid pipe, with a dust collection box connected to the flexible or corrugated pipe.

[0011] The frame includes a base, a mounting plate is horizontally arranged on the base, a U-shaped frame is fixedly arranged on the base, the U-shaped frame has a horizontal plate located above the mounting plate, the mounting plate is a movable plate that moves up and down, and a mounting plate drive mechanism is provided on the base; an upper heat sealing knife is arranged on the horizontal plate, and a lower heat sealing knife or elastic pad corresponding to the upper heat sealing knife is arranged on the mounting plate.

[0012] The mounting plate drive mechanism includes a first drive cylinder mounted on the base, with the cylinder body of the first drive cylinder fixedly connected to the base and the end of the piston rod fixedly connected to the mounting plate.

[0013] The base is provided with two or more guide rods, and a guide cylinder is fixedly provided on the mounting plate for guiding the upper and lower parts of the guide rods.

[0014] To achieve the above objectives, the present invention provides a method for using a rotary slitting and heat-sealing device with a cleaning apparatus, which includes the following steps: 1) The movable frame moves upward, moving the hot cutting blade away from the film; the rotating roller rotates 180°, moving the hot cutting blade to be cleaned to the cleaning position, and the other hot cutting blade to the working position; 2) The movable frame descends, causing the hot cutting blade at the working position to cut the film; at the same time, the cleaning device descends to the heating position and induction heats the hot cutting blade at the cleaning position; 3) After induction heating is completed, the cleaning device moves down to the cooling position to force cooling of the hot cutting blade, while the exhaust pipe sucks away the stripped residue. 4) After cleaning is completed, the cleaning device moves upward to reset; when the rotating roller rotates again, the cleaned hot cutting knife moves into the working position.

[0015] The heating time of the induction coil is 0.3s to 0.8s, the heating rate is 50℃ / s to 100℃ / s, and the peak heating temperature is 80℃ to 150℃; the temperature of the cooling gas blown by the cold air duct is -5℃ to 10℃, the pressure of the cooling gas blown by the cold air duct is 0.4 MPa to 1.4 MPa, the cooling time is 0.5s to 1.5s, and the cooling rate of the blade surface is 30℃ / s to 80℃ / s.

[0016] The beneficial effects of this invention are as follows: A rotating heat-sealing blade brings the hot-cutting blade to the top. An induction coil on the cleaning device first heats the blade, softening the plastic adhesive adhering to the blade surface without melting it. Then, rapid cooling causes the softened plastic adhesive to shrink quickly, generating internal stress and peeling off. The fallen plastic adhesive is then sucked away and collected through a ventilation pipe. This cleaning process avoids the back-and-forth contact and scraping of parts present in existing technologies, reducing the risk of damage. It also solves the technical problem in existing technologies where the scraper and hot-cutting blade need to contact and scrape back and forth, leading to easy damage to scraper and other parts, requiring frequent downtime for replacement or repair, thus affecting production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a structure of an embodiment of a rotary slitting and heat sealing device with a cleaning device according to the present invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 yes Figure 1 A magnified view of a section at point B in the middle; Figure 4 yes Figure 1 A structural diagram from another angle; Figure 5 yes Figure 1 A schematic diagram of the internal structure of a rotary slitting and heat sealing device with a cleaning unit; Figure 6 yes Figure 5 A magnified view of a section at point C; Figure 7 yes Figure 5 A magnified view of a section at point D; Figure 8 yes Figure 1 Schematic diagram of the cooperation relationship between the hot cutting blade and the cleaning device; Figure 9 yes Figure 8 A magnified view of a section at point E in the middle; Explanation of reference numerals in the attached drawings: 1. Frame; 2. Base; 3. Mounting plate; 4. Guide rod; 5. Guide cylinder; 6. U-shaped frame; 7. Horizontal plate; 8. Reinforcing rib; 9. Plastic film; 10. Upper heat sealing knife; 11. Lower heat sealing knife; 12. Refrigeration unit; 13. Cold air box; 14. Dust collection box; 15. Dust pump; 16. Rotating roller; 18. Housing; 19. Movable frame; 20. Vertical intermediate beam; 21. Top plate; 22. Second drive cylinder; 23. Third drive cylinder; 24. Exhaust pipe; 25. Cold air pipe; 26. Hot cutting knife; 27. First gear; 28. Mechanical brake; 29. ​​Second gear; 30. Second drive motor; 31. First drive cylinder; 33. Induction coil; 34. Insulating block; 35. Screw; 36. Heat insulation pad. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0019] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The use of "belonging" in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0020] An embodiment of the rotary slitting and heat-sealing apparatus with a cleaning device according to the present invention is as follows: Figures 1-9 As shown, the system includes a frame 1, on which a heat-sealing knife is mounted. Specifically, the frame 1 includes a base 2, on which a mounting plate 3 is horizontally mounted. The base 2 also includes a mounting plate drive mechanism, enabling the mounting plate 3 to move vertically. In this embodiment, the mounting plate drive mechanism includes a first drive cylinder 31 mounted on the base 2. The cylinder body of the first drive cylinder is fixedly connected to the base, and the end of the piston rod is fixedly connected to the mounting plate. The first drive cylinder can be a hydraulic cylinder. To ensure smooth vertical movement of the mounting plate, four guide rods 4 are provided on the base 2, and a guide cylinder 5, fitted around the outside of the guide rods 4, is fixedly mounted on the mounting plate 3 for vertical guidance. In other embodiments, the number of guide rods can also be two, arranged horizontally symmetrically.

[0021] Two U-shaped frames 6 are fixedly mounted on the base 2 and are horizontally spaced along the conveying direction of the plastic film 9. Each U-shaped frame 6 has a horizontal plate 7 located above the mounting plate, and an upper heat-sealing knife 10 is provided on each horizontal plate 7. A lower heat-sealing knife 11 corresponding to the upper heat-sealing knife 10 is provided on the mounting plate 3. Each U-shaped frame has a vertical plate portion, which is used to fix and connect to the base, for example, by welding or screw connection. A reinforcing rib 8 is provided between each vertical plate portion and the base. In other embodiments, only one layer of heat-sealing knife may be provided, such as an upper heat-sealing knife or a lower heat-sealing knife, and the corresponding lower heat-sealing knife or upper heat-sealing knife may be replaced by an elastic gasket, such as a silicone gasket or a rubber gasket.

[0022] In this embodiment, a movable frame 19 is movably mounted on the frame 1 along the vertical direction, and a movable frame drive mechanism is provided on the frame. To ensure the smooth vertical movement of the movable frame, vertical guide grooves (not shown in the figure) are symmetrically arranged on the frame, and guide blocks that cooperate with the vertical guide grooves to guide the movement vertically are provided on the movable frame. Specifically, the frame 1 also includes a top plate 21, and four vertical side beams and two vertical intermediate beams 20 are arranged between the base 2 and the top plate 21. The guide grooves are correspondingly arranged on the inner surfaces of the corresponding vertical intermediate beams. The movable frame drive mechanism includes a second drive cylinder 22, the cylinder body of which is fixedly connected to the top plate, and the piston rod of which is fixedly connected to the movable frame. The second drive cylinder 22 can drive the movable frame 19 to move vertically. The second drive cylinder can specifically be a hydraulic cylinder.

[0023] In this embodiment, the movable frame 19 is equipped with a rotating roller 16 and a rotating roller drive mechanism. Two hot-cutting blades 26 are symmetrically arranged on the rotating roller 16, spaced 180° apart circumferentially. Each hot-cutting blade has a working position (rotating downwards) and a cleaning position (rotating upwards). Specifically, the movable frame 19 has a downward-opening "U"-shaped structure. Both ends of the rotating roller 16 are equipped with rotating shafts, which rotate to the lower ends of the two side arms on the movable frame. The rotating roller drive mechanism includes a first gear 27 mounted on one side of the rotating shaft and a second drive motor 30 mounted on that side arm of the movable frame. The motor shaft of the second drive motor has a second gear 29 that meshes with the first gear 27. A mechanical brake 28, also called a holding brake, is provided on the rotating shaft. This brake quickly engages the rotating shaft after the second drive motor rotates to its position and is de-energized, keeping the rotating roller in a fixed position. The holding brake is existing technology, and its specific structure will not be described in this embodiment. The second drive motor enables the rotating roller and its hot-cutting blades to switch between the working position and the cleaning position. Each hot-cutting blade has a built-in heating wire, allowing for independent heating of the blade edge. This type of hot-cutting blade is existing technology, and its specific structure will not be described in detail in this embodiment. The hot-cutting blade 26 is detachably connected to the rotating roller 16. Specifically, the hot-cutting blade and the rotating roller are connected by screws 35, and a heat insulation pad 36 is provided between them to reduce the impact of the hot-cutting blade heating on the other hot-cutting blade.

[0024] In this embodiment, a cleaning device is movably mounted on the movable frame 19 above the rotating roller 16 in a vertical direction, and a cleaning device drive mechanism is provided on the movable frame. Specifically, the cleaning device includes a housing 18 for covering the outside of the hot cutting blade at the cleaning position. An induction coil 33 is provided inside the housing 18 for inductively heating the blade of the hot cutting blade, causing the plastic adhesive on the blade surface to soften. The induction coil 33 is fixed to the inner wall of the housing by an insulating block 34. A cold air pipe 25 is provided on the housing 18 for blowing cold air onto the hot cutting blade to forcibly cool the blade surface. Due to the difference in thermal expansion coefficients between the plastic adhesive and the hot cutting blade, when rapidly cooled, the softened residue generates internal stress due to rapid contraction, thereby cracking and peeling off from the hot cutting blade. At the same time, the blowing force of the cold air in the cold air pipe blows the residue off.

[0025] The cleaning device has a heating position and a cooling position that are moved up and down by a cleaning device drive mechanism. When the housing 18 is in the heating position, the induction coil 33 inside the housing 18 is aligned with the cutting edge of the hot cutting blade. When the housing is in the cooling position, the cooling air pipe 25 inside the housing is aligned with the cutting edge of the hot cutting blade. When the housing 18 is in the cooling position, the lower end face of the housing 18 contacts the outer surface of the rotating roller 16 to form a closed cavity, preventing the falling plastic adhesive from falling into the cavity. Specifically, the lower end face of the housing is provided with a rubber layer for sealing contact with the outer surface of the rotating roller 16. The cleaning device drive mechanism includes a third drive cylinder 23. The cylinder body of the third drive cylinder is connected to the movable frame, and the piston rod of the third drive cylinder is fixedly connected to the housing. That is, the third drive cylinder 23 can drive the cleaning device to move up and down, not only allowing the cleaning device to move between the heating and cooling positions, but also allowing it to move upwards to avoid the hot cutting blade, preventing interference between the cleaning device and the hot cutting blade when the rotating roller rotates. The third drive cylinder can specifically be a hydraulic cylinder.

[0026] In this embodiment, the housing 18 is provided with an exhaust pipe 24 for collecting fallen plastic residue. Specifically, the exhaust pipe 24 is provided on both sides of the hot cutting blade on the housing for collecting plastic residue that falls on both sides of the hot cutting blade. The exhaust pipe 24 is connected to a dust collection box 14, and the dust collection box 14 is connected to a vacuum pump 15. The dust collection box 14 and the vacuum pump 15 are prior art and will not be described in detail in this embodiment. Briefly, the vacuum pump provides suction, and the dust collection box is used to collect plastic residue. A filter screen is provided at the connection between the two to prevent plastic residue from entering the vacuum pump. Both the dust collection box 14 and the vacuum pump 15 are mounted on the base 2. There are multiple cold air pipes 25. In this embodiment, there are 18 cold air pipes 25, with 3 rows of 9 pipes on each side. The 3 cold air pipes in each row are arranged vertically at intervals, and the 3 rows of cold air pipes on each side are arranged horizontally at intervals along the side of the housing. Each cold air duct 25 is connected to a cold air box 13, which is connected to a refrigeration unit 12. The refrigeration unit uses an existing air cooler, which dries the factory's existing compressed air through a dehumidifier before sending it to the air cooler for deep cooling, and then delivers it to the cold air box. In this embodiment, each cold air duct is equipped with an electric valve to adjust the flow rate and speed of the cold air. In other embodiments, the number of cold air ducts can be adjusted according to actual needs.

[0027] In this embodiment, the exhaust duct 24 is a flexible hose, which connects to the dust collection box 14. In other embodiments, the exhaust duct includes a rigid pipe connected to the housing and a flexible or corrugated pipe connected to the rigid pipe, with the flexible or corrugated pipe connecting to the dust collection box. In this embodiment, the cold air duct 25 can also be a flexible hose. Of course, in other embodiments, the cold air duct can also be a rigid pipe connected to the housing and a flexible or corrugated pipe connected to the rigid pipe, with the flexible or corrugated pipe connecting to the cold air box.

[0028] In this embodiment, the heating time of the induction coil on the hot-cutting blade at the cleaning position is 0.3s to 0.8s, the heating rate is 50℃ / s to 100℃ / s, and the peak heating temperature is 80℃ to 150℃. The temperature of the cooling gas blown by the cold air duct is -5℃ to 10℃, the pressure of the cooling gas blown by the cold air duct is 0.4 MPa to 1.4 MPa, the cooling time is 0.5s to 1.5s, and the cooling rate of the blade surface is 30℃ / s to 80℃ / s. Only through the setting and coordination of the above process parameters can the plastic adhesive on the hot-cutting blade soften upon heating and be quickly peeled off from the blade upon cooling.

[0029] In this embodiment, the specific heating peak parameters need to be selected according to the plastic material to be heat-sealed and cut. For example: for polyethylene, the heating peak temperature is selected as 80℃~100℃; for polypropylene, the heating peak temperature is selected as 100℃~130℃; for polyvinyl chloride, the heating peak temperature is selected as 100℃~120℃; and for polyester, the heating peak temperature is selected as 130℃~150℃. The selection condition for this temperature is: higher than the glass transition temperature of the material but lower than its melting temperature. During the cutting process, the working temperature range of the blade surface of the hot cutter is usually between 150℃ and 260℃. The heating peak temperature of this invention is lower than the conventional hot cutting temperature, so as to soften the residue rather than melt it, and avoid the molten material dripping down and sticking to the surface of the rotating roller. The above heating rate ensures rapid heating, so that the residue generates thermal expansion stress in a short time, while avoiding excessive heat conduction to the blade substrate. The above-mentioned cooling gas temperature selection enables most thermoplastic plastic residues to enter a brittle state, while avoiding the blade material (such as high-speed steel) from becoming too cold and losing toughness. The cooling rate selection for the blade surface is as follows: below 30℃ / s: the temperature drop is too slow, the plastic residue has enough time to relax, and it cannot generate enough shrinkage stress, making it difficult for the residue to crack and peel off; above 80℃ / s: the temperature drop is too fast, which may cause thermal fatigue damage to the blade material and shorten the tool life.

[0030] The present invention discloses a method for using a rotary slitting and heat sealing device with a cleaning device, comprising the following steps: 1) The movable frame moves upward, so that the hot cutting blade moves away from the film; the rotating roller rotates 180°, so that the hot cutting blade to be cleaned is moved to the cleaning position, and the other hot cutting blade is moved to the working position; 2) After the hot cutting blade at the working position is heated to the slitting temperature, the movable frame moves down, causing the hot cutting blade at the working position to slit the film; at the same time, the cleaning device moves down to the heating position to induction heat the hot cutting blade at the cleaning position. 3) After induction heating is completed, the cleaning device moves down to the cooling position to force cooling of the hot cutting blade, while the exhaust pipe sucks away the stripped residue. 4) After cleaning is completed, the cleaning device moves upward to reset; when the rotating roller rotates again, the cleaned hot cutting knife moves into the working position.

[0031] In this embodiment, the first drive cylinder drives the mounting plate to move up and down, and the upper and lower heat sealing blades achieve heat sealing of the plastic film. Then, the movable frame moves down to cut the heat-sealed plastic film. Finally, the mounting plate moves down and the movable frame moves up to complete the heat sealing and cutting of the plastic film.

[0032] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0034] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

Claims

1. A rotary slitting and heat-sealing device with a cleaning apparatus, comprising a frame and a heat-sealing blade mounted on the frame, characterized in that: A movable frame is movably mounted on the frame in the vertical direction. A movable frame drive mechanism is mounted on the frame. A rotating roller and a rotating roller drive mechanism are mounted on the movable frame. Two hot cutting blades are symmetrically arranged on the rotating roller in the circumferential direction. Each hot cutting blade has a working position that rotates to the lower position and a cleaning position that rotates to the upper position. A cleaning device is movably mounted on the movable frame above the rotating roller in the vertical direction. A cleaning device drive mechanism is mounted on the movable frame. The cleaning device includes a housing for covering the outside of the hot cutting blade at the cleaning position. An induction coil is installed inside the housing to inductively heat the blade of the hot cutting blade, causing the plastic adhesive on the blade surface to soften. A cold air pipe is installed inside the housing to blow cold air to the hot cutting blade to force cooling the blade surface. Due to the difference in thermal expansion coefficients between the plastic adhesive and the hot cutting blade, the softened residue generates internal stress due to contraction, thereby cracking and peeling off from the hot cutting blade. The cleaning device has a heating position and a cooling position that are driven up and down by a cleaning device drive mechanism; when the housing is in the heating position, the induction coil inside the housing is aligned with the blade of the hot cutting knife; when the housing is in the cooling position, the cooling air pipe inside the housing is aligned with the blade of the hot cutting knife; when the housing is in the cooling position, the lower end face of the housing contacts the outer surface of the rotating roller to form a closed cavity, preventing the fallen plastic adhesive from falling out of the cavity; the housing is equipped with an exhaust pipe for sucking up and collecting the fallen plastic adhesive.

2. The rotary slitting and heat-sealing equipment with a cleaning device according to claim 1, characterized in that: The heating time of the induction coil is 0.3s to 0.8s, the heating rate is 50℃ / s to 100℃ / s, and the peak heating temperature is 80℃ to 150℃; the temperature of the cooling gas blown by the cold air duct is -5℃ to 10℃, the pressure of the cooling gas blown by the cold air duct is 0.4 MPa to 1.4 MPa, the cooling time is 0.5s to 1.5s, and the cooling rate of the blade surface is 30℃ / s to 80℃ / s.

3. The rotary slitting and heat-sealing equipment with a cleaning device according to claim 1, characterized in that: The frame is symmetrically provided with vertical guide grooves, and the movable frame is provided with guide blocks that cooperate with the vertical guide grooves to move up and down.

4. The rotary slitting and heat-sealing equipment with a cleaning device according to claim 1, characterized in that: The exhaust pipe is a flexible hose, which is connected to a dust collection box.

5. The rotary slitting and heat-sealing equipment with a cleaning device according to claim 1, characterized in that: The exhaust duct includes a rigid pipe connected to the housing and a flexible or corrugated pipe connected to the rigid pipe, with a dust collection box connected to the flexible or corrugated pipe.

6. The rotary slitting and heat-sealing equipment with a cleaning device according to any one of claims 1-5, characterized in that: The frame includes a base, a mounting plate is horizontally arranged on the base, a U-shaped frame is fixedly arranged on the base, the U-shaped frame has a horizontal plate located above the mounting plate, the mounting plate is a movable plate that moves up and down, and a mounting plate drive mechanism is provided on the base; an upper heat sealing knife is arranged on the horizontal plate, and a lower heat sealing knife or elastic pad corresponding to the upper heat sealing knife is arranged on the mounting plate.

7. The rotary slitting and heat-sealing equipment with a cleaning device according to claim 6, characterized in that: The mounting plate drive mechanism includes a first drive cylinder mounted on the base, with the cylinder body of the first drive cylinder fixedly connected to the base and the end of the piston rod fixedly connected to the mounting plate.

8. The rotary slitting and heat-sealing equipment with a cleaning device according to claim 6, characterized in that: The base is provided with two or more guide rods, and a guide cylinder is fixedly provided on the mounting plate for guiding the upper and lower parts of the guide rods.

9. A method of using the rotary slitting and heat-sealing equipment with a cleaning device as described in claim 1, characterized in that: Includes the following steps: 1) The movable frame moves upward, moving the hot cutting blade away from the film; The rotating roller rotates 180°, moving the hot cutting blade to be cleaned to the cleaning position, while the other hot cutting blade moves to the working position; 2) The movable frame descends, causing the hot cutting blade at the working position to cut the film; at the same time, the cleaning device descends to the heating position and induction heats the hot cutting blade at the cleaning position; 3) After induction heating is completed, the cleaning device moves down to the cooling position to force cooling of the hot cutting blade, while the exhaust pipe sucks away the stripped residue. 4) After cleaning is completed, the cleaning device moves upward to reset; when the rotating roller rotates again, the cleaned hot cutting knife moves into the working position.

10. The method of use according to claim 9, characterized in that: The heating time of the induction coil is 0.3s to 0.8s, the heating rate is 50℃ / s to 100℃ / s, and the peak heating temperature is 80℃ to 150℃; the temperature of the cooling gas blown by the cold air duct is -5℃ to 10℃, the pressure of the cooling gas blown by the cold air duct is 0.4 MPa to 1.4 MPa, the cooling time is 0.5s to 1.5s, and the cooling rate of the blade surface is 30℃ / s to 80℃ / s.

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