Automatic film sticking machine

Abstract

The application discloses an automatic film pasting machine, which comprises a conveying device for conveying products to be pasted with film, a film feeding assembly arranged above the conveying device, a film cutting assembly connected with a discharging end of the film feeding assembly, a film feeding conveying device for providing adsorption force for film material passing through the film cutting assembly, wherein the film feeding conveying device is arranged at the discharging end of the film feeding assembly, an electric control device for triggering synchronous conveying of the film feeding conveying device and the conveying device, and the discharging end of the film feeding conveying device is arranged opposite to the discharging end of the conveying device. In this way, the film can smoothly leave the film feeding assembly, so that the problem of film winding on the roller can be solved. The film feeding conveying device and the conveying device are controlled to be synchronously conveyed, the film conveyed out of the film feeding conveying device is just covered on the surface of the product to be pasted with film conveyed by the discharging end of the conveying device, the product pasted with film continues to be conveyed forward, and thus the film pasting action is completed. The automatic film pasting machine can continuously work and has higher working efficiency.

Description

Technical Field

[0001] This invention relates to the field of food packaging technology, and in particular to an automatic film applicator. Background Technology

[0002] For some processed foods, preservation and dust prevention measures are required before they leave the factory, necessitating outer packaging to ensure freshness and cleanliness. This is especially true for pastries containing jam; to prevent jam from adhering to the inner surface of the packaging and affecting the quality, a common practice is to cover the surface of the food with a film, thus preserving its texture and flavor.

[0003] In existing food packaging processes, film laminating machines are commonly used to apply film to food products, such as toast bread. Specifically, the film is fed by a film feeding device in the film laminating machine, and then the film material passes through a film cutting device to cut the film material into film pieces of appropriate size. The film is then applied to cover the toast bread. The toast product after film application is fresh, clean, hygienic, and aesthetically pleasing, and it is more efficient than manual film application.

[0004] However, after the film material is conveyed by the film feeding device and then cut into individual film sheets by the film cutting device, the film sheets are relatively thin, and static electricity is generated after the film sheets pass through the conveying rollers in the film feeding device. As a result, the cut film sheets are often rolled into the back of the film feeding device by the rollers, making it impossible for the film sheets to detach smoothly from the film feeding device. This leads to failure of toast film application, resulting in waste of film material and reduced film application efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic film applicator that can prevent the cut film from being rolled up behind the film feeding assembly and thus prevent normal film application. This facilitates continuous film application, reduces film waste, and increases production output.

[0006] According to one aspect of the present invention, the provided technical solution is as follows: an automatic film applicator includes a conveying device for conveying products to be applicated, a film feeding assembly disposed above the conveying device, and a film cutting assembly connected to the unloading end of the film feeding assembly. It also includes a film conveying device that provides adsorption force to the film material passing through the film cutting assembly, the film conveying device being disposed at the unloading end of the film feeding assembly; an electronic control device for triggering and controlling the synchronous conveying of the film conveying device and the conveying device; the unloading end of the film conveying device is opposite to the unloading end of the conveying device, and the film sheet conveyed by the film conveying device precisely covers the surface of the product to be applicated conveyed from the unloading end of the conveying device. The applicated products continue to be conveyed forward together, completing the applicator operation.

[0007] The automatic film applicator of this invention has the following advantages: A conveying device transports the product to be applicated, while a film feeding assembly simultaneously conveys the film material in the same direction. A cutting assembly then cuts the film material into film sheets adapted to the size of the product. The film feeding and conveying device is located at the unloading end of the film feeding assembly and provides adsorption force for the film material passing through the cutting assembly. The cut film sheets are transported along with the film feeding and conveying device, ensuring that the film sheets smoothly leave the film feeding assembly and solving the problem of the film sheets being wound up by the rollers behind the film feeding assembly due to static electricity. An electronic control device triggers and controls the film feeding and conveying devices to transport synchronously. The unloading ends of the film feeding and conveying devices are positioned opposite each other, so the film sheets conveyed by the film feeding and conveying device precisely cover the surface of the product to be applicated, which is transported from the unloading end of the conveying device. The applicated product continues to be conveyed forward, completing the applicator operation. This allows for continuous operation and higher work efficiency.

[0008] In some embodiments, the film feeding and conveying device is a negative pressure film feeding and conveying device. This utilizes negative pressure technology to achieve adsorption of the film material; the technology is mature, stable, and easy to implement.

[0009] In some embodiments, the negative pressure film conveying device includes a connecting bracket, a negative pressure mechanism and a conveyor belt mechanism mounted on the connecting bracket; the negative pressure mechanism includes a negative pressure frame and a negative pressure generator, the negative pressure frame is mounted on the connecting bracket, and the negative pressure output end of the negative pressure generator is connected to the negative pressure frame, enabling a negative pressure environment to be formed inside the negative pressure frame; the conveyor belt mechanism includes a transmission power component and a conveyor belt, the transmission power component is mounted on the connecting bracket, and the conveyor belt is poweredly connected to the power output end of the transmission power component, with several ventilation holes on its surface, the conveyor belt covering the frame opening surface of the negative pressure frame, and the negative pressure generator providing adsorption force to the film material on the conveyor belt through the ventilation holes, allowing the film material to be conveyed with the conveyor belt. Thus, the cavity formed between the negative pressure frame and the conveyor belt generates negative pressure through the negative pressure generator, causing the film material to adhere to the surface of the conveyor belt, and the adsorption force on the film material through the ventilation holes on the conveyor belt achieves the effect of smoothly conveying the film material with the conveyor belt.

[0010] In some embodiments, the automatic laminating machine includes a feeding assembly for mounting the film roll and a film-passing assembly for guiding and flattening the film. The feeding assembly, film-passing assembly, film feeding assembly, and film cutting assembly are arranged sequentially along the film conveying direction. The automatic laminating machine also includes a support side plate and a height adjustment device connected to the support side plate for adjusting the height of the film feeding assembly, film passing assembly, and film cutting assembly. Thus, the feeding assembly enables rapid loading and unloading of the film roll, the film passing assembly guides and limits the flattening of the film, and the height adjustment device can accommodate laminating processes for toast products of different thicknesses, expanding the applicability of product packaging.

[0011] In some embodiments, the feeding assembly includes a roller mounted on a support side plate and a locking device for securing the film roll; the film conveying assembly includes several rollers mounted on the support side plate and limiting sleeves sleeved on the rollers. The film roll passes through the outer surfaces of the rollers and its axial position is limited by the limiting sleeves. Thus, the roller and locking device enable rapid installation and removal of the film roll, improving production efficiency. The rollers and limiting sleeves guide and limit the film roll, preventing entanglement or misalignment during transport.

[0012] In some embodiments, the automatic laminating machine includes a main frame, a conveying device, a film feeding assembly, a film cutting assembly, a film conveying device, and an electrical control device mounted on the main frame. The film feeding assembly includes a drive roller, a driven roller, and a gap adjusting member that adjusts the radial position of the driven roller. The drive roller and the driven roller are arranged side by side, with a gap between them suitable for the film material to pass through. The film cutting assembly includes a base, a fixed blade mounted on the base, an elastic extrusion member, and a linear moving member. The linear moving member has a movable end that can move towards or away from the fixed blade. A movable blade is mounted on the movable end, and the movable blade has an extension plate that abuts against the fixed blade. When the movable end moves towards the fixed blade, the blade edge of the movable blade is tangential to the blade edge of the fixed blade. The elastic extrusion member abuts against the extension plate, and the extrusion force of the elastic extrusion member is directed towards the fixed blade, so that the extension plate and the fixed blade remain in abutting state. Thus, by adjusting the radial position of the driven roller through the gap adjusting member, the size of the gap between the drive roller and the driven roller is adjusted, thereby clamping or releasing the film material. By setting an extension plate on the movable blade, with the side of the extension plate coplanar with the side of the movable blade, the extension plate abuts against the fixed blade. At the same time, by setting an elastic pressing member, the extension plate is pressed, so that the extension plate and the fixed blade are always in abutting state, thereby reducing the gap between the fixed blade and the movable blade. Therefore, when the linear moving member drives the movable blade to cut the fixed blade, the effectiveness of the movable blade and the fixed blade in cutting the film can be improved, thus increasing the service life of the film cutting assembly.

[0013] In some embodiments, the elastic pressing member includes a spring and a movable frame. The movable frame is hinged to a base. One end of the spring is mounted on the base, and the other end abuts against one side of the movable frame. The movable frame is able to press its other side against the protruding plate under the elastic force of the spring. The movable frame is L-shaped, with one end hinged to the base and the other end connected to the end of the spring away from the base. A pressing block is provided at the corner of the movable frame. The pressing block abuts against and presses against the protruding plate in the direction of the fixed blade under the elastic force of the spring. Thus, by providing a spring, the elastic force provided by the spring causes the movable frame to press against the protruding plate, thereby causing the protruding plate to press against the fixed blade.

[0014] In some embodiments, the linear moving component includes a moving frame, a driving component, a guide component, and a transmission rod. The moving frame is the moving end and is slidably fitted to the base. The movable blade is mounted on the moving frame. The driving component is relatively fixed to the base, and its driving end is connected to the guide component. One end of the transmission rod is hinged to the guide component at a position away from the driving component, and the other end is hinged to the moving frame. The driving component, guide component, transmission rod, and moving frame form a crank-slider structure, driving the moving frame to move linearly. Thus, by setting up a crank-slider mechanism formed by the driving component, guide component, transmission rod, and moving frame, the moving frame achieves linear reciprocating motion under the rotational drive of the driving component, realizing the rapid cutting of the film material.

[0015] In some embodiments, the guide component employs an eccentric wheel, which rotates coaxially with the driving end of the drive component. One end of the transmission rod is hinged to the side of the eccentric wheel. The base is equipped with a slide rail, the length direction of which is parallel to the moving direction of the moving frame. The moving frame is equipped with a slider, which slides in conjunction with the slide rail. Thus, the guide component uses an eccentric wheel structure, and by transmitting power to the transmission rod using the eccentric wheel, the motion stability of the transmission rod can be improved, thereby enhancing the stability of the linear reciprocating motion of the moving frame. By setting a slide rail and a slider between the moving frame and the base, the function of stable sliding of the moving frame on the base is achieved.

[0016] In some embodiments, the conveying device includes a power component, a drive shaft, a driven shaft, and a conveyor belt sleeved around the drive shaft and driven shaft. The power component is poweredly connected to the drive shaft. The electrical control device includes a frequency converter, a PLC controller, and an operation panel. The operation panel is electrically connected to the frequency converter, the PLC controller, the conveying device, the film feeding assembly, the film cutting assembly, and the film feeding conveyor. Thus, the PLC controller triggers the film feeding conveyor to transport the cut film to its unloading end, achieving synchronous transport between the film feeding conveyor and the conveying device. The unloading end of the film feeding conveyor is positioned opposite to the unloading end of the conveying device. The film conveyed by the film feeding conveyor precisely covers the surface of the product to be filmed, which is transported from the unloading end of the conveying device. The film-covered product continues to be transported forward, completing the film application process. This allows for continuous operation and higher work efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of an automatic film applicator according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 The diagram shows the structure of the negative pressure film conveying device.

[0019] Figure 3 for Figure 2 A structural diagram from another side view;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 This is a rear view of an automatic film applicator according to another embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the film feeding assembly, the negative pressure film feeding and conveying device, and the film passing assembly in another embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of the film-cutting assembly in another embodiment of the present invention;

[0024] Figure 8 for Figure 7 A structural diagram from another side view;

[0025] Figure 9 for Figure 7 The main view.

[0026] Explanation of reference numerals in the attached figures:

[0027] 10. Conveying device; 11. Drive shaft; 12. Driven shaft; 13. Conveyor belt; 20. Film feeding assembly; 21. Driven roller; 22. Driven roller; 30. Film cutting assembly; 31. Base; 311. Opening; 312. Slide rail; 32. Fixed blade; 33. Elastic extrusion component; 331. Spring; 332. Movable frame; 34. Movable blade; 35. Linear moving component; 351. Movable frame; 352. Drive component; 353. Guide component; 354. Transmission rod; 355. Slider; 36. Extension plate; 37. Pressing block; 38. Pressing roller; 40. Negative pressure film feeding conveyor. 41. Feeding device; 41. Connecting bracket; 411. Connecting shaft; 42. Negative pressure mechanism; 421. Negative pressure frame; 422. Air extraction port; 43. Conveyor belt mechanism; 431. Conveyor belt; 432. Tensioning roller; 433. Vent hole; 44. Tilting mechanism; 441. Rotating component; 442. Coupling; 50. Electrical control device; 51. Operation panel; 60. Feeding assembly; 61. Reel; 62. Locking component; 70. Film conveying assembly; 71. Roller; 72. Limiting sleeve; 80. Height adjustment device; 81. Lead screw; 82. Handwheel; 90. Support side plate; 100. Main frame. Detailed Implementation

[0028] To better understand the purpose, structure, and function of the invention, the invention will be described in further detail below with reference to the accompanying drawings.

[0029] like Figure 1The figure schematically illustrates an automatic film applicator according to an embodiment of the present invention. As shown, the automatic film applicator includes a main frame 100, a conveying device 10 mounted on the main frame 100, a film feeding assembly 20, a film cutting assembly 30, a film conveying device, and an electrical control device 50. The conveying device 10 is used to convey products to be filmed. This automatic film applicator can be used to apply film to pastries such as toast and cakes with jam on the surface, realizing a pre-packaging process, preventing jam from adhering to the inner surface of the packaging bag, affecting the quality of the toast, and ensuring the cleanliness, hygiene, and appearance of the toast product. The conveying device 10 employs a power component (not shown), a drive shaft 11, a driven shaft 12, and a conveyor belt 13. The power component drives the drive shaft 11 to rotate, causing the outer conveyor belt 13 to move around the drive shaft 11 and the driven shaft 12, realizing the conveying function of the product to be filmed. In this embodiment, the toast product is conveyed to proceed to the next step of the film-applying pre-packaging process.

[0030] The film feeding assembly 20 is located above the conveying device 10. The film cutting assembly 30 is connected to the unloading end of the film feeding assembly 20. The film feeding assembly 20 conveys film material to the film cutting assembly 30. The film cutting assembly 30 is used to cut the conveyed film material. The cut size depends on the size of the toast. The film conveying device is located at the unloading end of the film feeding assembly 20 and provides adsorption force for the film material passing through the film cutting assembly 30. The cut film segments can be conveyed with the film conveying device. This ensures that the film leaves the film feeding assembly 20 smoothly, thus solving the problem of the film being wound into the back of the film feeding assembly 20 due to static electricity. The electrical control device 50 uses a frequency converter, a PLC controller (not shown), and an operation panel 51. The operation panel 51 is electrically connected to the frequency converter, the PLC controller, and the power components of the conveying device 10, the film feeding assembly 20, the film cutting assembly 30, and the film conveying device. When the conveyor 10 senses that the toast has been transported to the unloading end, it triggers the film feeding conveyor to transport the cut film to its unloading end. This enables the film feeding conveyor and the conveyor 10 to be transported synchronously under the control of the electronic control device 50. The unloading end of the film feeding conveyor is set opposite to the unloading end of the conveyor 10. In this way, the film conveyed by the film feeding conveyor covers the surface of the toast to be filmed that has been transported from the unloading end of the conveyor 10. The toast with the film on continues to be transported forward together, thus completing the film application. This allows for continuous operation and higher work efficiency, with a film application speed of up to 80 to 100 pieces per minute.

[0031] In this embodiment, the film feeding and conveying device uses a negative pressure film feeding and conveying device 40 to adsorb the film material. For example... Figures 2 to 4As shown, the negative pressure film conveying device 40 includes a connecting bracket 41, a negative pressure mechanism 42 and a conveyor belt mechanism 43 mounted on the connecting bracket 41. The negative pressure mechanism 42 includes a negative pressure frame 421 and a negative pressure generator (not shown). The negative pressure frame 421 is mounted on the connecting bracket 41, and an air extraction port 422 is provided on the side of the negative pressure frame 421. The negative pressure output end of the negative pressure generator is connected to the air extraction port 422, so that the negative pressure output end is connected to the inner cavity of the negative pressure frame 421, thereby creating a negative pressure environment inside the negative pressure frame 421. The conveyor belt mechanism 43 includes a transmission power component and a transmission belt 431. The transmission power component includes a drive device (not shown) and two tension rollers 432. The device can employ a servo motor, stepper motor, DC motor, or other motor with a drive mechanism. The drive unit is mounted on the connecting bracket 41 and has a drive end. Two tension rollers 432 are rotatably mounted on the connecting bracket 41, distributed on both sides of the connecting bracket 41 along the conveying direction of the conveyor belt 431. One tension roller 432 rotates coaxially with the drive end of the drive unit. This coaxial rotation can be achieved by directly connecting the tension roller 432 to the drive end of the drive unit, or indirectly connecting the tension roller 432 to the drive end of the drive unit via a coupling. The conveyor belt 431 is fitted and tensioned around the outer circumference of the two tension rollers, and the conveyor belt 431 is set at an angle. Figure 4 As shown, the conveyor belt 431 has several ventilation holes 433 on its surface. The conveyor belt 431 covers the surface of the negative pressure frame 421. The negative pressure generator can provide adsorption force to the film material on the conveyor belt 431 through the ventilation holes 433, so that the film material is conveyed with the conveyor belt 431. The ventilation holes 433 are evenly distributed on the surface of the conveyor belt 431 to provide uniform adsorption force.

[0032] like Figure 2 and Figure 3 As shown, the negative pressure film conveying device 40 also includes a flipping mechanism 44. A connecting bracket 41 is connected to the rotating end of the flipping mechanism 44 to realize the function of flipping the connecting bracket 41. The flipping mechanism 44 includes a fixed frame (not shown) and a rotating component 441. The rotating component 441 adopts a structure with rotation function such as a servo motor, stepper motor, or motor. The rotating component 441 is mounted on the fixed frame and has a rotating end. This rotating end is connected to the connecting bracket 41. The connecting bracket 41 is provided with a connecting shaft 411. The rotating end of the rotating component 441 is connected to the connecting shaft 411 through a coupling 442, so that the rotating component 441 can drive the connecting bracket 41 to perform a flipping motion.

[0033] In another embodiment, such as Figure 1 and Figure 5As shown, the automatic film applicator also includes a feeding assembly 60, a film conveying assembly 70, a support side plate 90, and a height adjustment device 80. The feeding assembly 60 is used to install the film roll, and the film conveying assembly 70 is used to guide and flatten the film. The feeding assembly 60, the film conveying assembly 70, the film feeding assembly 20, and the film cutting assembly 30 are arranged sequentially along the film conveying direction. The height adjustment device 80 is connected to the support side plate 90 and includes a power component, a lead screw 81 that is powered to the power component, and a slider (not shown) that is slidably connected to the lead screw 81. The lead screw 81 is vertically arranged. The support side plate 90 is fixedly connected to the slider. The film feeding assembly 20, the film passing assembly 70, and the film cutting assembly 30 are installed on the support side plate 90. In this example, the power component is a handwheel 82 connected to the lead screw 81. Of course, in other embodiments, a motor drive can also be used. The handwheel 82 drives the lead screw 81 to rotate, thereby causing the support side plate 90 to move up and down relative to the lead screw 81 with the slider. This allows the height adjustment device 80 to adjust the height of the film feeding assembly 20, the film passing assembly 70, and the film cutting assembly 30 to adapt to the film application process of toast products of different thicknesses.

[0034] like Figure 1 and Figure 6 As shown, the feeding assembly 60 includes a roller 61 mounted on the support side plate 90 and a locking member 62 for fixing the film roll. The film roll is fitted onto the roller 61. The locking member 62 includes a movable lock head, which can quickly fix and disassemble the film roll, realizing the rapid installation and removal of the film roll. The film passing assembly 70 includes a plurality of rollers 71 mounted on the support side plate 90 and a limiting sleeve 72 sleeved on the rollers 71. The plurality of rollers 71 are installed perpendicular to the support side plate 90. The film material passes through the outer surface of the plurality of rollers 71 and its axial position is limited by the limiting sleeve 72, which is used to guide and limit the flattening of the film material.

[0035] In this embodiment, see Figure 1 and 6 As shown in the figure, the film feeding assembly 20 includes an active roller 21, a driven roller 22, and a gap adjustment component (not shown). The active roller 21 is driven by a power component. The active roller 21 and the driven roller 22 are arranged side by side, and a gap suitable for the film material to pass through is directly provided between them. The size of the gap between the active roller 21 and the driven roller 22 can be adjusted by adjusting the radial position of the driven roller 22 through the gap adjustment component, thereby clamping or releasing the film material.

[0036] See Figures 7 to 9The film cutting assembly 30 includes a base 31, a fixed blade 32, a linear moving member 35, a movable blade 34, and an elastic pressing member 33. The fixed blade 32 is mounted on the base 311. The linear moving member 35 has a moving end that can move toward or away from the fixed blade 32. The movable blade 34 is mounted on the moving end of the linear moving member 35. An extension plate 36 is integrally connected to the side of the movable blade 34. The side of the extension plate 36 is coplanar with the side of the movable blade 34. The upper surface of the extension plate 36 abuts against the lower surface of the fixed blade 32. When the moving end moves toward the fixed blade 32, the movable blade 34 is tangent to the fixed blade 32. The elastic pressing member 33 is mounted on the base 31 and abuts against the extension plate 36. The elastic pressing member 33 can generate a pressing force on the extension plate 36 toward the fixed blade 32, so that when the elastic pressing member 33 abuts against the extension plate 36, the extension plate 36 and the fixed blade 32 remain abutted. Thus, by providing an extension plate 36 to the movable blade 34, with the side of the extension plate 36 being coplanar with the side of the movable blade 34, the extension plate 36 abuts against the fixed blade 32. Simultaneously, by providing an elastic pressing member 33, the extension plate 36 is pressed against the fixed blade 32, thereby ensuring that the extension plate 36 and the fixed blade 32 remain in abutting state. This reduces the gap between the fixed blade 32 and the movable blade 34. Therefore, when the linear moving member 35 drives the movable blade 34 to tangent with the fixed blade 32, the effectiveness of the movable blade 34 and the fixed blade 32 in cutting the film can be improved, thereby increasing the service life of the film cutting assembly.

[0037] The base 31 is plate-shaped and has an opening 311. A cutting position is formed between the fixed blade 32 and the movable blade 34. The opening 311 is directly opposite the cutting position so that the peeling product can enter the cutting position between the fixed blade 32 and the movable blade 34 through the opening 311. This facilitates the movable blade 34 to be tangent to the fixed blade 32 by the linear moving member 35, thereby cutting the film material.

[0038] The linear moving component 35 includes a moving frame 351 (i.e., the moving end), a driving component 352, a guide component 353, and a transmission rod 354. The moving frame 351 is slidably engaged with the base 31 and can move linearly on the base 31 in a direction toward or away from the fixed blade 32. The movable blade 34 is mounted on the moving frame 351. The driving component 352 is a servo motor, DC motor, stepper motor, or motor. The driving component 352 is mounted on the corresponding frame and remains relatively fixed with the base 31. The guide component 353 is connected to the driving end of the driving component 352 and can be driven by the driving component 352 to rotate. The guide component 353 is an eccentric wheel that rotates coaxially with the driving end of the driving component 352. One end of the transmission rod 354 is hinged to the side of the eccentric wheel. There is a gap between the hinge point between the transmission rod 354 and the eccentric wheel and the center of the eccentric wheel. The other end of the transmission rod 354 is hinged to the side of the moving frame 351. Thus, a crank-slider structure is formed by the moving frame 351, the driving component 352, the guide component 353, and the transmission rod 354, thereby realizing the function of the moving end (moving frame 351) of the linear moving component 35 moving linearly under the driving action of the driving component 352, and realizing the rapid cutting of the film material.

[0039] In order to achieve a sliding fit between the movable frame 351 and the base 31, the base 31 is provided with a slide rail 312. The length direction of the slide rail 312 is parallel to the moving direction of the moving end of the linear moving member 35. The movable frame 351 is provided with a slider 355, which slides in fit with the slide rail 312.

[0040] To improve the stability of the protruding plate 36 abutting against the fixed blade 32, there are two protruding plates 36. The two protruding plates 36 are distributed at both ends of the length direction of the movable blade 34. The two protruding plates 36 correspond to the two ends of the length direction of the fixed blade 32, respectively. The upper surfaces of the two protruding plates 36 of the movable blade 34 abut against the lower surfaces of the two ends of the fixed blade 32.

[0041] There are two elastic pressing members 33, which are distributed at both ends of the fixed blade 32 along its length and are used to press the corresponding two protruding plates 36. The elastic pressing member 33 includes a spring 331, a movable frame 332, and a pressing roller 38. One end of the spring 331 is mounted on the base 31. The movable frame 332 is L-shaped, with one end hinged to the base 31 and the other end connected to the end of the spring 331 away from the base 31. The L-shaped opening 311 of the movable frame 332 faces the spring 331. A pressing block 37 is integrally connected to the corner of the movable frame 332. The pressing block 37 faces the fixed blade 32 and is close to the protruding plate 36. The pressing roller 38 is rotatably mounted on the side of the pressing block 37. Under the elastic force of the spring 331, the pressing block 37 of the movable frame 332 abuts against the protruding plate 36 through the wheel surface of the pressing roller 38, so that the protruding plate 36 presses against the side of the fixed blade 32. Therefore, by setting up an L-shaped movable frame 332, under the elastic force of the spring 331, the movable frame 332 flips about the hinge point between itself and the base 31 in a direction away from the spring 331, and drives the pressing roller 38 to press against the extension plate 36, so that the extension plate 36 presses against the side of the fixed blade 32, thereby reducing the gap between the fixed blade 32 and the movable blade 34.

[0042] Understandably, by using the pressing block 37 of the movable frame 332 to press the protruding plate 36 toward the fixed blade 32, the upper surface of the protruding plate 36 can be pressed against the lower surface of the fixed blade 32. Since the upper surface of the protruding plate 36 is coplanar with the upper surface of the movable blade 34, the gap between the fixed blade 32 and the movable blade 34 can be reduced.

[0043] Similarly, the movable frame 332 can be hinged to the base 31, with one end of the spring 331 mounted on the base 31 and the other end abutting against one side of the movable frame 332, so that the movable frame 332 can be abutted against the protruding plate 36 by the elastic force of the spring 331. Since the upper surface of the protruding plate 36 is coplanar with the upper surface of the movable blade 34, the gap between the fixed blade 32 and the movable blade 34 can be reduced.

[0044] In summary, this invention, through the setting of the film feeding and conveying device, can transport the cut film segments along with the film feeding and conveying device, ensuring that the film leaves the film feeding assembly smoothly, thereby solving the problem of film getting caught in the rollers. At the same time, the electronic control device 50 controls the film feeding and conveying device 10 to transport synchronously. The unloading end of the film feeding and conveying device is set opposite to the unloading end of the conveying device 10, which ensures that the film conveyed by the film feeding and conveying device covers the surface of the product to be filmed by the unloading end of the conveying device 10. The filmed product continues to be conveyed forward together to complete the film application action, thereby enabling continuous operation and improving work efficiency.

[0045] The above descriptions are merely some embodiments of the present invention. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by the present invention.

Claims

1. An automatic film applicator, comprising a conveying device for conveying products to be applicated, a film feeding assembly disposed above the conveying device, and a film cutting assembly connected to the unloading end of the film feeding assembly, characterized in that, Also includes: A film feeding and conveying device that provides adsorption force to the film material passing through the film cutting assembly is located at the unloading end of the film feeding assembly; An electronic control device that triggers and controls the synchronous conveying of the film feeding and conveying devices; The unloading end of the film feeding and conveying device is set opposite to the unloading end of the conveying device. The film conveyed by the film feeding and conveying device covers the surface of the product to be filmed, which is conveyed by the unloading end of the conveying device. The filmed products continue to be conveyed forward together to complete the film application. The film feeding and conveying device is a negative pressure film feeding and conveying device, which includes a connecting bracket, a negative pressure mechanism and a conveyor belt mechanism installed on the connecting bracket; The negative pressure mechanism includes a negative pressure frame and a negative pressure generator. The negative pressure frame is mounted on the connecting bracket, and the negative pressure output end of the negative pressure generator is connected to the negative pressure frame, which enables a negative pressure environment to be formed inside the negative pressure frame. The conveyor belt mechanism includes a power transmission component and a conveyor belt. The power transmission component is mounted on the connecting bracket. The conveyor belt is poweredly connected to the power output end of the power transmission component. The surface of the conveyor belt has several ventilation holes. The conveyor belt covers the surface of the negative pressure frame. The negative pressure generator can provide adsorption force to the film material on the conveyor belt through the ventilation holes, so that the film material is conveyed with the conveyor belt.

2. The automatic film applicator according to claim 1, characterized in that, The automatic film applicator includes a feeding assembly for mounting the film roll and a film passing assembly for guiding and flattening the film. The feeding assembly, film passing assembly, film feeding assembly, and film cutting assembly are arranged sequentially along the film conveying direction. It also includes a support side plate and a height adjustment device connected to the support side plate for adjusting the height of the film feeding assembly, the film passing assembly and the film cutting assembly.

3. The automatic film applicator according to claim 2, characterized in that, The feeding assembly includes a roll mounted on the support side plate and a locking device for fixing the film roll; The film-coating assembly includes a plurality of rollers mounted on the support side plate and a limiting sleeve sleeved on the rollers. The film material passes through the outer surface of the plurality of rollers and is restricted in its axial position by the limiting sleeve.

4. The automatic film applicator according to any one of claims 1-3, characterized in that, The automatic film applicator includes a main frame, and the conveying device, film feeding assembly, film cutting assembly, film feeding conveying device and electrical control device are installed on the main frame; The film feeding assembly includes a driving roller, a driven roller, and a gap adjusting member that can adjust the radial position of the driven roller. The driving roller and the driven roller are arranged side by side, and a gap suitable for the film material to pass through is provided between them. The film cutting assembly includes a base, a fixed blade mounted on the base, an elastic extruder, and a linear moving member. The linear moving member is provided with a movable end that can move toward or away from the fixed blade. A movable blade is mounted on the movable end. The movable blade is provided with an extension plate that abuts against the fixed blade. When the movable end moves toward the fixed blade, the blade edge of the movable blade is tangent to the blade edge of the fixed blade. The elastic extruder abuts against the protruding plate, and the extrusion force of the elastic extruder is directed towards the fixed blade, so that the protruding plate and the fixed blade remain in abutting state.

5. The automatic film applicator according to claim 4, characterized in that, The elastic compression member includes a spring and a movable frame. The movable frame is hinged to the base. One end of the spring is mounted on the base, and the other end abuts against one side of the movable frame. The movable frame can be abutted against the protruding plate by the elastic force of the spring. The movable frame is L-shaped, with one end hinged to the base and the other end connected to the end of the spring away from the base. A pressing block is provided at the corner of the movable frame. The pressing block, under the elastic force of the spring, abuts against and presses the protruding plate in the direction of the fixed blade.

6. The automatic film applicator according to claim 4, characterized in that, The linear moving component includes a moving frame, a driving component, a guide component, and a transmission rod. The moving frame is the moving end and is slidably engaged with the base. The movable blade is mounted on the moving frame. The driving component is fixed relative to the base, and its driving end is connected to the guide component. One end of the transmission rod is hinged to the guide component at a position away from the driving component, and the other end is hinged to the moving frame. The driving component, guide component, transmission rod, and moving frame form a crank-slider structure, which drives the moving frame to move linearly.

7. The automatic film applicator according to claim 6, characterized in that, The guide component adopts an eccentric wheel, which rotates coaxially with the driving end of the driving component, and one end of the transmission rod is hinged to the side of the eccentric wheel; The base is provided with a slide rail, the length direction of which is parallel to the moving direction of the movable frame. The movable frame is provided with a slider, which slides in conjunction with the slide rail.

8. The automatic film applicator according to any one of claims 1-3, characterized in that, The conveying device includes a power component, a drive shaft, a driven shaft, and a conveyor belt sleeved around the drive shaft and the driven shaft. The power component is poweredly connected to the drive shaft. The electrical control device includes a frequency converter, a PLC controller, and an operation panel. The operation panel is electrically connected to the frequency converter, the PLC controller, the conveying device, the film feeding assembly, the film cutting assembly, and the film feeding and conveying device.

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