Heat shrink film corner cutting device and heat shrink film equipment

Abstract

A heat-shrink film chamfering device includes a conveying module, a clutch module, a clamping module, a chamfering module and a cutting knife module. The conveying module includes a conveyor belt for conveying product boxes. The clutch module includes two stoppers symmetrically arranged on both sides of the conveyor belt and capable of moving towards or away from each other. After the two stoppers move towards each other, they can stop the product boxes on the conveyor belt. The clamping module is used to position the product boxes stopped by the stoppers. The chamfering module is used to smooth the heat-shrink film at the edges of the product boxes. The cutting knife module is used to heat-cut the heat-shrink film. After heat-cutting, the two stoppers move away from each other to enable the conveyor belt to convey the product boxes to the other side of the two stoppers. After the two stoppers move towards each other, the conveyor belt conveys the product boxes in the reverse direction to enable the stoppers to stop the other side of the product boxes, thereby enabling the clamping module, the chamfering module and the cutting knife module to cut off the heat-shrink film at the other side edge of the product boxes. A heat-shrink film device includes the above heat-shrink film chamfering device, achieving the purpose of improving the chamfering effect and efficiency.

Description

Technical Field

[0001] The present application relates to a heat shrink film corner cutting device and a heat shrink film equipment. Background Art

[0002] Currently, in the process of heat shrink film production for product packaging, the heat shrink film will have parts that do not fit the surface of the product box at the corners of the product box, especially at the four edges of the side walls of the product box. The excess parts will affect the final appearance of the product box, so they need to be cut off. However, traditional heat shrink film corner cutting methods or equipment have the problems of low cutting accuracy and low efficiency. Summary of the invention

[0003] In view of this, it is necessary to provide a heat shrink film corner cutting device and a heat shrink film equipment having the heat shrink film corner cutting device which can improve the corner cutting effect and efficiency.

[0004] In one embodiment of the present application, a heat shrink film corner cutting device is provided, comprising a transmission module, a clutch module, a clamping module, a corner smoothing module and a cutter module. The transmission module comprises a conveyor belt, and the conveyor belt is used to transmit product boxes. The clutch module comprises two stoppers, and the two stoppers are symmetrically arranged on both sides of the conveyor belt and can move toward or away from each other. After the two stoppers move toward each other, they can stop the product box on the conveyor belt. The clamping module is used to position the product box stopped by the stopper. The corner smoothing module is used to smooth the heat shrink film at the edge of the product box on one side of the stopper to the surface of the stopper. The cutter module is used to move toward the stopper to hot-cut the smoothed heat shrink film. After the cutting module heat-cuts the heat shrink film on one side of the product box, the two stoppers move away from each other so that the conveyor belt conveys the product box to the other side of the two stoppers. After the two stoppers move toward each other, the conveyor belt conveys the product box in the opposite direction so that the stoppers stop the other side of the product box, thereby allowing the clamping module, the corner-grinding module and the cutting module to cut off the heat shrink film at the edge of the other side of the product box.

[0005] The above-mentioned heat shrink film corner cutting device moves toward each other through two stoppers, and then transports the product box through the conveyor belt until it contacts the stoppers. Then the clamping module, the corner smoothing module and the cutting knife module cut off the heat shrink film at the edge of one side of the product box. After hot cutting, the two stoppers move away from each other so that the conveyor belt transports the product box to the other side of the two stoppers. After the two stoppers move toward each other again, the conveyor belt transports the product box in the opposite direction so that the stoppers stop the other side of the product box, thereby allowing the clamping module, the corner smoothing module and the cutting knife module to cut off the heat shrink film at the edge of the other side of the product box, thereby refining the operating action and achieving the purpose of improving the accuracy and efficiency of corner cutting.

[0006] In some embodiments, the heat-shrink film chamfering device further includes a box pushing module. When the conveyor belt conveys the product box in the reverse direction, the box pushing module is configured to push another product box towards the stopper until the product box contacts the stopper, so that the clamping module, the chamfering module and the cutting knife module simultaneously chamfer another product box.

[0007] In some embodiments, the clamping module includes four clamping plates, and one clamping plate is respectively arranged on both sides of each stopper. Two opposite clamping plates are used to position the product box on the corresponding side of the stopper to position the product box.

[0008] In some embodiments, the chamfering module includes four chamfering plates, and one chamfering plate is respectively arranged on both sides of each stopper. Each chamfering plate is used to smooth the heat-shrink film at the corresponding corner of the product box and make the heat-shrink film fit the stopper.

[0009] In some embodiments, the cutting knife module includes four cutting knives, and one cutting knife is respectively arranged on both sides of each stopper. Each cutting knife is used to thermally cut the heat-shrink film at the corresponding corner of the product box.

[0010] In some embodiments, a bottom knife surface and a chamfering surface are provided on both sides of each stopper. The bottom knife surface is arranged parallel to the conveying direction of the conveyor belt, and the chamfering surface is perpendicular to the bottom knife surface. After the stopper moves, the bottom knife surface can be flush with the side wall of the product box on the corresponding side. After the chamfering plate moves, the heat-shrink film can be pressed onto the chamfering surface on the corresponding side and make the heat-shrink film fit the bottom knife surface on the corresponding side. The bottom knife surface is used to cooperate with the cutting knife on the corresponding side to thermally cut the heat-shrink film.

[0011] In some embodiments, a receiving groove is provided at the connection between each chamfering surface and the bottom knife surface. The receiving groove is used to receive the chamfering plate on the corresponding side, and the depth of the receiving groove is greater than the thickness of the chamfering plate.

[0012] In some embodiments, a suction port is provided on the groove surface of each receiving groove. The suction port is internally connected to a storage box through the stopper, and the suction port can generate a vacuum to make the heat-shrink film closely adhere to the bottom knife surface and suck the thermally cut heat-shrink film into the storage box.

[0013] In some embodiments, the chamfering module further includes four sets of telescopic drivers, telescopic slide rails, a translation driver, and a translation slide rail. The translation slide rail is arranged parallel to the conveying direction of the conveyor belt, the telescopic slide rail is arranged perpendicular to the translation slide rail, the telescopic slide rail is slidably arranged on the translation slide rail, the chamfering plate is slidably arranged on the telescopic slide rail, the telescopic driver is used to drive the chamfering plate to move along the telescopic slide rail to approach or move away from the product box, and the translation driver is used to drive the chamfering plate to move along the translation slide rail to approach or move away from the stopper.

[0014] In an embodiment of the present application, a heat shrink film device is further provided, including the above-mentioned heat shrink film chamfering device, which is used to cut off the heat shrink film extending out of the surface of the product box at the corners of the product box. The heat shrink film device also achieves the purpose of improving the chamfering effect and efficiency through the heat shrink film chamfering device. Description of the Drawings

[0015] Figure 1 It is a three-dimensional schematic diagram of the heat shrink film chamfering device in an embodiment of the present application.

[0016] Figure 2 is Figure 1 the top view of the heat shrink film chamfering device in

[0017] Figure 3 is Figure 1 the three-dimensional schematic diagram of another perspective of the heat shrink film chamfering device in

[0018] Figure 4 is Figure 1 the three-dimensional schematic diagram of half of the heat shrink film chamfering device in

[0019] Figure 5 It is a three-dimensional schematic diagram of the clutch mechanism in an embodiment of the present application.

[0020] Figure 6 It is the top view of the heat shrink film chamfering device clamping the product box in an embodiment of the present application.

[0021] Figure 7 It is the top view of the heat shrink film chamfering device after chamfering in an embodiment of the present application.

[0022] Figure 8 It is the top view of the heat shrink film chamfering device during hot cutting in an embodiment of the present application.

[0023] Figure 9 It is the top view of the heat shrink film chamfering device after hot cutting in an embodiment of the present application.

[0024] Description of the Main Component Symbols

[0025] Heat shrink film chamfering device 100

[0026] Product box 200

[0027] Conveyor module 10

[0028] Conveyor belt 11

[0029] Clutch module 20

[0030] Stopper 21

[0031] Bottom knife surface 21a

[0032] Chamfered surface 21b

[0033] Receiving groove 21c

[0034] Suction port 21d

[0035] Bottom plate 22

[0036] Pusher 23

[0037] Clutch slide rail 24

[0038] Clamping module 30

[0039] Clamping plate 31

[0040] Chamfering module 40

[0041] Chamfering plate 41

[0042] Telescopic actuator 42

[0043] Telescopic slide rail 43

[0044] Translation actuator 44

[0045] Translation slide rail 45

[0046] Cutting knife module 50

[0047] Cutting knife 51 Detailed implementation manners

[0048] Next, the technical solutions of this application will be described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0049] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0051] In an embodiment of the present application, a heat-shrinkable film chamfering device is provided, which includes a conveying module, a clutch module, a clamping module, a chamfering module and a cutting knife module. The conveying module includes a conveyor belt for conveying product boxes. The clutch module includes two stoppers symmetrically arranged on both sides of the conveyor belt and capable of moving towards or away from each other. After the two stoppers move towards each other, they can stop the product box on the conveyor belt. The clamping module is used to position the product box stopped by the stopper. The chamfering module is used to smooth the heat-shrinkable film at the edge of the product box facing the stopper to the surface of the stopper. The cutting knife module is used to move towards the stopper to hot-cut the smoothed heat-shrinkable film. After the cutting knife module hot-cuts the heat-shrinkable film on one side of the product box, the two stoppers move away from each other to enable the conveyor belt to convey the product box to the other side of the two stoppers. After the two stoppers move towards each other again, the conveyor belt conveys the product box in the reverse direction so that the stopper stops the other side of the product box, and then the clamping module, the chamfering module and the cutting knife module cut off the heat-shrinkable film at the edge of the other side of the product box.

[0052] The above heat-shrinkable film chamfering device moves the two stoppers towards each other, then conveys the product box through the conveyor belt until it contacts the stopper. Then, the clamping module, the chamfering module and the cutting knife module cut off the heat-shrinkable film at the edge of one side of the product box. After hot-cutting, the two stoppers move away from each other to enable the conveyor belt to convey the product box to the other side of the two stoppers. After the two stoppers move towards each other again, the conveyor belt conveys the product box in the reverse direction so that the stopper stops the other side of the product box, and then the clamping module, the chamfering module and the cutting knife module cut off the heat-shrinkable film at the edge of the other side of the product box, thereby refining the operation actions and achieving the purpose of improving the chamfering accuracy and efficiency.

[0053] In one embodiment of the present application, a heat shrink film device is provided, comprising the heat shrink film corner cutting device, which is used to cut off the heat shrink film extending from the product box surface at the corner of the product box. The heat shrink film device also achieves the purpose of improving the corner cutting effect and efficiency through the heat shrink film corner cutting device.

[0054] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0055] See also Figure 1 , Figure 2 and Figure 3 In one embodiment of the present application, a heat shrink film corner cutting device 100 is provided, which is used to cut off the excess part of the corner of the product box 200 that does not fit the surface of the product box 200, so as to improve the appearance of the product box 200. The heat shrink film corner cutting device 100 includes a transmission module 10, a clutch module 20, a clamping module 30, a corner smoothing module 40 and a cutter module 50. The clamping module 30, the corner smoothing module 40 and the cutter module 50 are installed on the clutch module 20. The transmission module 10 includes a conveyor belt 11. The conveyor belt 11 is used to convey the product box 200 along a straight line. The clutch module 20 includes two stoppers 21. The two stoppers 21 are symmetrically arranged on both sides of the conveyor belt 11 and can move toward or away from each other. After the two stoppers 21 move toward each other, they can stop the movement of the product box 200 on the conveyor belt 11, and after the two stoppers 21 move away from each other, they can allow the product box 200 on the conveyor belt 11 to continue to be conveyed. The clamping module 30 is used to position the product box 200 stopped by the stopper 21 to position the product box 200 and prevent the product box 200 from shaking. The corner-smoothing module 40 is used to smooth the heat shrink film on both sides of the edge of the product box 200 facing the stopper 21 so that the heat shrink film fits the surface of the stopper 21. The cutting module 50 is used to move toward the stopper 21 to heat-cut the heat shrink film smoothed by the corner-smoothing module 40.

[0056] One embodiment of the heat-shrink film chamfering device 100 for chamfering the product box 200 is as follows: The two stoppers 21 move towards each other, and the conveyor belt 11 conveys a product box 200 in the X direction until the product box 200 contacts the stopper 21; the clamping module 30 clamps the product box 200 stopped by the stopper 21 in the Y direction; the chamfering module 40 and the cutting knife module 50 cooperate to hot-cut the redundant heat-shrink film at both ends of the side of the product box 200 facing the two stoppers 21; after hot-cutting, the two stoppers 21 move away from each other to enable the conveyor belt 11 to continue conveying the product box 200 to the other side of the two stoppers 21; after the product box 200 reaches the other side of the two stoppers 21, the two stoppers 21 move towards each other again, and then the conveyor belt 11 conveys the product box 200 in the reverse direction so that the un-chamfered side of the product box 200 contacts the stopper 21; after contact, the clamping module 30, the chamfering module 40 and the cutting knife module 50 repeat the same actions to hot-cut the heat-shrink film at both ends of the other side of the product box 200, thereby completing the cutting of the redundant heat-shrink film at the four corners of the product box 200. Among them, the melted and fused heat-shrink film after hot-cutting can be automatically sealed and adhered to the product box for aesthetics.

[0057] In some embodiments, in order to improve efficiency, the two stoppers 21 cut two product boxes 200 simultaneously on both sides in the X direction. In order for the product boxes 200 on both sides to contact the stoppers 21, the heat-shrink film chamfering device 100 further includes a box-pushing module (not shown in the figure). When the conveyor belt 11 conveys the product box 200 in the reverse direction, only one side of the product box 200 can be guaranteed to contact the stopper 21, while the other side cannot be guaranteed. Therefore, the box-pushing module needs to push the other product box 200 towards the stopper 21 until the product box 200 contacts the stopper 21, so that the clamping module 30, the chamfering module 40 and the cutting knife module 50 can chamfer the two product boxes 200 simultaneously.

[0058] Please refer to Figure 4 , the clamping module 30 includes four clamping plates 31. One clamping plate 31 is provided on each side of each stopper 21. The two opposite clamping plates 31 clamp the product box 200 on the corresponding side in the Y direction to position the product box 200. As an exemplary example, the clamping plate 31 is driven by a cylinder.

[0059] The chamfering module 40 includes four chamfering plates 41. One chamfering plate 41 is provided on each side of each stopper 21. Each chamfering plate 41 is used to smooth the heat-shrink film at the corresponding corner of the product box 200 and make the heat-shrink film adhere to the stopper 21.

[0060] The cutting knife module 50 includes four cutting knives 51. One cutting knife 51 is provided on each side of each stopper 21. Each cutting knife 51 is used to hot-cut the heat-shrink film at the corresponding corner of the product box 200.

[0061] Please refer to Figure 4 and Figure 5, in some embodiments, a bottom knife surface 21a and a chamfered surface 21b are provided on both sides of each stopper 21. The bottom knife surface 21a is arranged parallel to the conveying direction of the conveyor belt 11, and the chamfered surface 21b is perpendicular to the bottom knife surface 21a. After the stopper 21 moves, the bottom knife surface 21a can be flush with the side wall of the corresponding product box 200, that is, in the same plane. After the chamfering plate 41 moves, it can press the heat-shrinkable film onto the corresponding chamfered surface 21b and make the heat-shrinkable film fit the corresponding bottom knife surface 21a. The bottom knife surface 21a is used to cooperate with the corresponding cutter 51 to hot-cut the heat-shrinkable film, and the cutter 51 hot-cuts towards the bottom knife surface 21a to hot-cut the heat-shrinkable film.

[0062] In some embodiments, a receiving groove 21c is provided at the connection between each chamfered surface 21b and the bottom knife surface 21a. The receiving groove 21c is used to receive the corresponding chamfering plate 41, and the depth of the receiving groove 21c is greater than the thickness of the chamfering plate 41 to prevent the chamfering plate 41 from interfering with the cutter 51, that is, to prevent the chamfering plate 41 from being located between the cutter 51 and the bottom knife surface 21a. When the cutter 51 hot-cuts, it does not need to avoid the chamfering plate 41, making the hot-cutting smoother and improving the hot-cutting efficiency.

[0063] In some embodiments, a suction port 21d is provided on the groove surface of each receiving groove 21c. The suction port 21d is internally connected to a storage box through the stopper 21. The suction port 21d can generate a vacuum to make the heat-shrinkable film closely adhere to the bottom knife surface 21a and suck the hot-cut heat-shrinkable film into the storage box for waste recycling.

[0064] In some embodiments, the chamfering module 40 further includes four sets of telescopic drivers 42, telescopic slide rails 43, a translation driver 44 and a translation slide rail 45. The translation slide rail 45 is arranged along the X direction parallel to the conveying direction of the conveyor belt 11, and the telescopic slide rail 43 is arranged perpendicular to the translation slide rail 45. The telescopic slide rail 43 is slidably arranged on the translation slide rail 45, and the chamfering plate 41 is slidably arranged on the telescopic slide rail 43. The telescopic driver 42 is used to drive the chamfering plate 41 to move along the telescopic slide rail 43 to approach or move away from the product box 200, and the translation driver 44 is used to drive the chamfering plate 41 to move along the translation slide rail 45 to approach or move away from the stopper 21, thereby controlling the movement of the chamfering plate 41 in the XY plane. As an exemplary example, the telescopic driver 42 is a cylinder, and the translation driver 44 is a motor belt assembly.

[0065] Please refer to Figure 5 , in some embodiments, the clutch module 20 further includes two sets of bottom plates 22, a pusher 23 and a clutch slide rail 24. The two sets of bottom plates 22, the pusher 23 and the clutch slide rail 24 are respectively located on both sides of the conveyor belt 11. A stopper 21 is arranged on one bottom plate 22, and the bottom plate 22 is slidably arranged on the clutch slide rail 24. The clutch slide rail 14 is arranged along the Y direction. The pusher 23 is used to push the bottom plate 22 to drive the stopper 21 to move along the clutch slide rail 24 to realize the movement of the two stoppers 21 towards or away from each other.

[0066] Please refer to Figure 6 , an embodiment of the heat shrink film chamfering device 100 for chamfering the product box 200 is as follows: after the two stoppers 11 move towards each other, the conveyor belt 11 conveys the product box 200 with two corners already cut in the reverse direction to the left side of the stopper 11. At the same time, the box pushing module pushes another product box 200 without chamfering to the right side of the stopper 11, and then clamps the product box 200 by the clamping plates 31 on both sides of the product box 200, and makes the side wall of the product box 200 flush with the bottom knife surface 21a. At this time, both the chamfering plate 41 and the cutting knife 51 are far away from the product box 200;

[0067] Please refer to Figure 7 , after clamping the product box 200, the chamfering plate 41 first moves close to the side wall of the product box 200 along the Y direction, and then moves along the X direction close to the side wall towards the stopper 21 until the chamfering plate 41 enters the receiving groove 21c. At this time, the chamfering plate 41 presses the heat shrink film tightly against the groove surface of the receiving groove 21c, and at the same time makes the heat shrink film taut and closely attached to the bottom knife surface 21a. At this time, the cutting knife 51 is still far away from the product box 200;

[0068] Please refer to Figure 8 , after smoothing the heat shrink film, the cutting knife 51 moves towards the bottom knife surface 21a to thermally cut the heat shrink film. After thermal cutting, the suction port 21d sucks the thermally cut heat shrink film into the storage box;

[0069] After thermal cutting, the two stoppers 11 move away from each other, and the clamping plates 31, the chamfering plate 41 and the cutting knife 51 are all far away from the product box 200 to release the product box 200. The conveyor belt 11 conveys the product box 200 with all four corners thermally cut to the discharge port. At the same time, the product box 200 with only two corners cut is transferred to the other side of the two stoppers 11, that is, transferred from the right side to the left side of the two stoppers 11 along the X direction as shown in the figure.

[0070] In an embodiment of the present application, a heat shrink film device (not shown in the figure) is further provided, including a heat shrink film chamfering device 100, which is used to cut off the heat shrink film extending out of the surface of the product box at the corners of the product box to facilitate aesthetics.

[0071] The above heat-shrinkable film chamfering device 100 moves two stoppers 21 towards each other, then conveys the product box 200 through the conveyor belt 11 until it contacts the stoppers 21. Then, the clamping module 30, the chamfering module 40, and the cutting tool module 50 cut the heat-shrinkable film at one side edge of the product box 200. After hot cutting, the two stoppers move away from each other to enable the conveyor belt 11 to convey the product box 200 to the other side of the two stoppers 21. After the two stoppers 21 move towards each other again, the conveyor belt 11 conveys the product box 200 in the reverse direction to enable the stopper 21 to stop the other side of the product box 200, thereby enabling the clamping module 30, the chamfering module 40, and the cutting tool module 50 to cut the heat-shrinkable film at the other side edge of the product box, further refining the operation actions, and achieving the purpose of improving the chamfering accuracy and efficiency. The heat-shrinkable film device also achieves the purpose of improving the chamfering effect and efficiency through the heat-shrinkable film chamfering device 100.

[0072] In addition, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. As long as appropriate changes and variations made to the above embodiments fall within the scope of the spirit of the present application, they are within the disclosure scope of the present application.

Claims

1. A heat shrink film cutting device, It is characterized in that include: A conveying module, comprising a conveyor belt, wherein the conveyor belt is used to convey the product box; A clutch module, comprising two sets of bottom plates, two stoppers and two clutch slide rails, wherein the two clutch slide rails are arranged on both sides of the conveyor belt, each bottom plate is slidably arranged on the clutch slide rail, and each stopper is arranged on one slide rail, so that the slide rail can guide the two stoppers to move toward or away from each other, and the two stoppers can stop the product box on the conveyor belt after moving toward each other; A clamping module, used for positioning the product box stopped by the stopper; A corner smoothing module, used for smoothing the heat shrink film at the edge of the product box facing the stopper to the surface of the stopper; and A cutter module, used for moving toward the stopper to thermally cut the smoothed heat shrink film; After the cutting module heat-cuts the heat shrink film on one side of the product box, the two stoppers move away from each other so that the conveyor belt conveys the product box to the other side of the two stoppers. After the two stoppers move toward each other, the conveyor belt conveys the product box in the opposite direction so that the stoppers stop the other side of the product box, thereby allowing the clamping module, the corner-grinding module and the cutting module to cut off the heat shrink film at the edge of the other side of the product box.

2. The heat shrink film corner cutting device according to claim 1, Features: The heat shrink film corner cutting device also includes a box pushing module. When the conveyor belt transports the product box in the reverse direction, the box pushing module is used to push another product box toward the stopper until the product box contacts the stopper, so that the clamping module, the corner smoothing module and the cutting knife module simultaneously cut the corner of the other product box.

3. The heat shrink film corner cutting device according to claim 1, Features: The clamping module includes four clamping plates, each of which is provided with one clamping plate on both sides of the stopper, and the two opposite clamping plates are used to clamp the product box on the corresponding side of the stopper to position the product box.

4. The heat shrink film corner cutting device according to claim 1, Features: The corner-smoothing module includes four corner-smoothing plates, each of which is provided with one corner-smoothing plate on both sides of each stopper, and each corner-smoothing plate is used to smooth the heat shrink film at the corresponding corner of the product box and make the heat shrink film fit the stopper.

5. The heat shrink film corner cutting device according to claim 4, Features: The cutter module comprises four cutters, each of which is provided with a cutter on both sides of each stopper, and each cutter is used for hot cutting the heat shrink film at the corresponding corner of the product box.

6. The heat shrink film corner cutting device according to claim 5, Features: On both sides of each of the stoppers, there is a bottom knife surface and a chamfering surface. The bottom knife surface is arranged parallel to the conveying direction of the conveyor belt, and the chamfering surface is perpendicular to the bottom knife surface. After the stopper moves, the bottom knife surface can be flush with the side wall of the corresponding product box. After the chamfering plate moves, it can press the heat-shrinkable film onto the chamfering surface on the corresponding side and make the heat-shrinkable film fit the bottom knife surface on the corresponding side. The bottom knife surface is used to cooperate with the cutter on the corresponding side to cut the heat-shrinkable film by hot cutting.

7. The heat-shrinkable film chamfering device according to claim 6, characterized in that: At the connection of each chamfering surface and the bottom knife surface, there is a receiving groove for receiving the chamfering plate on the corresponding side, and the depth of the receiving groove is greater than the thickness of the chamfering plate.

8. The heat-shrinkable film chamfering device according to claim 7, characterized in that: On the groove surface of each receiving groove, there is a suction port. The suction port is internally connected to a storage box through the stopper, and the suction port can generate a vacuum to make the heat-shrinkable film closely adhere to the bottom knife surface and suck the heat-shrinkable film after hot cutting into the storage box.

9. The heat-shrinkable film chamfering device according to claim 4, characterized in that: The chamfering module further includes four sets of telescopic drivers, telescopic slide rails, a translation driver and a translation slide rail. The translation slide rail is arranged parallel to the conveying direction of the conveyor belt, and the telescopic slide rail is arranged perpendicular to the translation slide rail. The telescopic slide rail is slidably arranged on the translation slide rail, and the chamfering plate is slidably arranged on the telescopic slide rail. The telescopic driver is used to drive the chamfering plate to move along the telescopic slide rail to approach or move away from the product box, and the translation driver is used to drive the chamfering plate to move along the translation slide rail to approach or move away from the stopper.

10. A heat-shrinkable film device, including a heat-shrinkable film chamfering device for cutting off the heat-shrinkable film extending out of the surface of the product box at the corners of the product box, characterized in that: The heat-shrinkable film chamfering device is the heat-shrinkable film chamfering device according to any one of claims 1-9.

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