A preparation device and preparation method of environmentally friendly degradable composite film

Abstract

The invention provides a device for preparing an environment-friendly and degradable composite film, wherein a glue coating roller is arranged above one side of the glue pool, the glue coating roller is also rotatably installed in a production frame, an air pressure roller is arranged on one side of the glue coating roller, and blowing holes are arranged in an equidistant array on one side of the air pressure roller, the blowing holes are opened in a direction toward the glue coating roller, the film runs through the glue coating roller and the air pressure roller, a rebound air bag is arranged on one side of the glue pool, the rebound air bag and the air pressure roller are fixedly connected, the airflow is discharged through the blowing holes by squeezing the rebound air bag, and the film is pushed to always fit with the glue coating roller during the conveying process, so as to ensure that the glue liquid of the film is evenly coated; a scraper plate is arranged on the side of the glue coating roller away from the air pressure roller, so as to ensure that the glue liquid of the film is evenly coated, and a reciprocating transverse movement component is arranged on one side of the scraper plate, and the airflow is discharged through the blowing holes, so as to always fit with the glue coating roller during the conveying process, so as to ensure that the glue liquid of the film is evenly coated.

Description

Technical Field

[0001] The present invention relates to the technical field of degradable composite film production, specifically to a device for preparing an environmentally friendly degradable composite film, and more particularly to a method for preparing the environmentally friendly degradable composite film based on the preparation device. Background Art

[0002] Composite films are multilayer films formed by combining various plastics with paper, metal, or other materials through lamination, extrusion coating, co-extrusion, and other processes to form a composite film. They are widely used in food, processed meat products, daily necessities, cosmetics, chemical products, and pesticides to achieve sealed flexible packaging for products and meet various packaging functions such as inflation, vacuuming, and thermoforming. Environmentally friendly, degradable composite films degrade into carbon dioxide and water in a short period of time and have the effect of improving soil quality. The prior art methods for preparing composite films include dry lamination, in which an adhesive is applied to the surface of a substrate using a laminating machine, and then the film is pressed onto another film using heated rollers or passed through a drying oven.

[0003] Publication number "CN217993571U" provides a device for preparing an environmentally friendly, degradable composite film for packaging, comprising a box body, a composite workbench fixedly connected to the inner bottom wall of the box body, a film inlet opening on the left side of the box body, a film outlet opening on the right side of the box body, an air purification component fixedly connected to the upper surface of the box body, a cylinder fixedly connected to the upper surface of the box body, a laminating roller bracket fixedly connected to the output end of the cylinder, a laminating roller drum rotatably connected to the inner wall of the laminating roller bracket, an extrusion bottom plate fixedly connected to the right side of the laminating roller bracket, and a plurality of exhaust extrusion plates fixedly connected to the lower surface of the extrusion bottom plate. The device purifies and filters the air between the two layers of film through an electrostatic dust removal rod, removes dust between the two films, and does not cause air bubbles or bulging, thereby ensuring the production effect of the composite film; the air in the box body is extracted by a vacuum pump and discharged back into the inner cavity of the box body through a dust collector for purification, so that the inner cavity of the box body always maintains a dust-free environment, ensuring the film-forming effect.

[0004] However, the above device and the prior art still have the following problems during implementation:

[0005] In the existing composite film preparation process, when laminating between the film bodies, a layer of glue needs to be applied, and the composite film is formed by squeezing and laminating through an extrusion roller. However, in the existing gluing process, the glue cannot be evenly applied, which leads to bubbles, wrinkles and other phenomena easily generated during the film lamination process, thereby reducing the quality of the finished composite film. At the same time, during production, the unevenly coated films will generate horizontal component forces when laminating, causing the two films to offset and reducing the lamination quality. Summary of the Invention

[0006] The purpose of the present invention is to provide an environmentally friendly and degradable composite film preparation device to solve the problems raised in the above-mentioned background technology, to ensure the uniform coating of the glue on the film to the greatest extent, to avoid the generation of bubbles, wrinkles and other phenomena during the film composite process, and to improve the quality of the finished composite film.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A device for preparing an environmentally friendly degradable composite film, comprising a winding roller, a tensioning shaft, a pressure roller, a glue roller and a glue pool, wherein the winding roller, the tensioning shaft, the pressure roller and the glue roller are all rotatably installed in a production frame of the environmentally friendly degradable composite film, and the surfaces of the winding roller, the tensioning shaft, the pressure roller and the glue roller are sequentially fitted to convey the film to be laminated, a glue roller is provided below the pressure roller, the film passes between the pressure roller and the glue roller, the glue roller is rotatably installed in the glue pool, a glue coating roller is provided above one side of the glue pool, the glue coating roller is also rotatably installed in the production frame, an air pressure roller is provided on one side of the glue coating roller, and the air pressure roller is equidistant from one side thereof The array has blowing holes, and the blowing holes are opened toward the glue coating roller. The film runs through the glue coating roller and the air pressure roller. A rebound airbag is provided on one side of the glue pool. The rebound airbag and the air pressure roller are fixedly connected. The air flow is discharged through the blowing holes by squeezing the rebound airbag, and the film is always pressed against the glue coating roller during the transportation process to ensure that the glue coating of the film is uniform; a scraper plate is provided on the side of the glue coating roller away from the air pressure roller, and the scraper plate and the surface of the glue coating roller are fitted together to ensure that the glue on the surface of the glue coating roller is evenly distributed, thereby ensuring that the glue coating on the film is uniform. A reciprocating transverse movement component is provided on one side of the scraper plate.

[0009] Preferably, both ends of the upper glue roller are connected to a main transmission shaft, a first synchronous pulley is fixedly mounted on the surface of the main transmission shaft, a rotating shaft is symmetrically and rotatably mounted on the inner wall of the glue pool, a second synchronous pulley is fixedly mounted on the surface of the rotating shaft, the first synchronous pulley and the second synchronous pulley are connected by a synchronous belt transmission, and a cam is fixedly mounted on one end of the rotating shaft and the main transmission shaft.

[0010] Preferably, the rebound airbag includes an upper compression airbag and a lower compression airbag, an airbag connecting layer is connected between the upper compression airbag and the lower compression airbag, one side of the airbag connecting layer is fixedly connected to the outer wall of the rubber pool through a fixed shaft, the upper compression airbag and the lower compression airbag are both slidingly connected to the rubber pool, the two groups of cam edges are respectively arranged to fit the upper compression airbag and the lower compression airbag, the upper compression airbag and the lower compression airbag are connected to an air outlet pipe, and the air outlet pipe is fixedly connected to the air pressure roller through the connected air supply pipe.

[0011] Preferably, guide wheels are arranged in an equidistant array on one side of the upper compression airbag and the lower compression airbag, and guide bars are provided on one side of the outer wall of the glue pool corresponding to the sliding positions of the guide wheels, and guide grooves are provided in the guide bars.

[0012] Preferably, the glue pool is provided with several groups of columns near the glue coating roller, the top of the columns is connected to a support plate, the reciprocating transverse movement component is provided on one side of the support plate surface, and the two ends of the upper glue roller are rotatably installed in the glue pool through the bearing seat.

[0013] Preferably, the reciprocating transverse movement assembly includes a ball screw rotatably mounted on one side of the support plate, a transmission assembly is arranged between the ball screw and the pressure roller, two sets of electrical guide rails are respectively arranged on the upper and lower sides of the ball screw on one side of the support plate, a cylinder is fixedly mounted on the slider of the electrical guide rail, and the scraper plate is also arranged as an axially cut half structure, and the two sets of scraper plates arranged in half are respectively fixedly mounted on the output rod end of the cylinder.

[0014] Preferably, the transmission assembly includes a third synchronous pulley and a fourth synchronous pulley, and a transition drive shaft is rotatably installed on one side of the support plate, the third synchronous pulley is fixedly installed on one end of the pressure roller, the fourth synchronous pulley is fixedly installed on one end of the transition drive shaft, the third synchronous pulley and the fourth synchronous pulley are transmission-connected, and the other end of the transition drive shaft is fixedly installed with a sixth synchronous pulley, and one end of the ball screw is fixedly installed with a fifth synchronous pulley, and the fifth synchronous pulley and the sixth synchronous pulley are transmission-connected, the surface of the ball screw is provided with an internal threaded sleeve, and the internal threaded sleeve is provided with an axially cut half structure, and the two groups of scraper plates arranged in half are fixedly connected to the internal threaded sleeves arranged in half, and the support plate is provided with photoelectric control switches at both ends of the electrical guide rail, and the photoelectric control switch is electrically connected to the cylinder to control the opening and closing of the scraper plates.

[0015] Preferably, a compression chamber is provided on one side of the support plate, a slide groove is opened on one side of the compression chamber, a moving rod is slidably installed in the slide groove, an accordion plate is installed in the slide groove, one end of the moving rod extends into the compression chamber and is fixedly connected to the piston plate in the compression chamber, the other end of the moving rod is slidably and fixedly connected to the electrical guide rail, the compression chamber is connected to an air chamber through an air chamber air guide pipe and a fixed air chamber, a guide plate is provided on one side of the support plate near the glue pool, the air chamber is provided at the joint position of the guide plate and the support plate, an air nozzle on one side of the air chamber matches the inclination angle of the guide plate, and can blow the glue collected on the surface of the guide plate into the glue pool.

[0016] Preferably, the compression chamber is fixedly connected to the adsorption chamber through an adsorption air pipe, the air chamber air guide pipe and the adsorption air pipe are both arranged at the two end ends of the compression chamber, and there are suction nozzles in an equidistant array on one side of the adsorption chamber. The suction nozzles can apply adsorption force to the film being transported, so that the film is always in contact with the glue coating roller for gluing.

[0017] A preparation method, based on the above-mentioned preparation device of an environmentally friendly degradable composite film, comprises the following steps:

[0018] S1: Start the production equipment of environmentally friendly biodegradable composite film. The winding roller, tensioning shaft, pressure roller and gluing roller all start to rotate. The film in the winding roller is sequentially bonded to the above rollers and conveyed to start gluing.

[0019] S2: The rotation of the glue roller drives two sets of cams to squeeze the upper and lower compression airbags respectively, so that the gas in the rebound airbag is blown to the film through the air pressure roller. During the conveying process of the film, it is always in contact with the glue roller;

[0020] S3: The pressure roller rotates, and the ball screw is driven to rotate through the transmission component, thereby driving the scraper plate to fit the glue roller to scrape the glue on the surface of the glue roller. This can still prevent the glue on the surface of the glue roller from local accumulation during the action of the glue roller, ensuring uniform glue coating on the film.

[0021] S4: A group of compression chambers are set on one side of the support plate. The adsorption chamber connected to it cooperates with the blowing force of the air pressure roller to provide adsorption force, so as to better fit the film and the glue roller and ensure uniform glue coating;

[0022] S5: The glued film is heated in a drying box and then pressed against another set of films and rolled up to form a composite film.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention provides an air pressure roller on one side of the glue coating roller. Blowing holes are arranged in an equidistant array on one side of the air pressure roller. The blowing holes are opened toward the glue coating roller. The film passes through the glue coating roller and the air pressure roller. A set of rebound airbags is provided and fixedly connected to the air pressure roller. An extrusion assembly provided at one end of the glue coating roller squeezes the rebound airbags to discharge air through the blowing holes, pushing the film to always adhere to the glue coating roller during the conveying process. This ensures that the glue coating on the film is uniform, avoids horizontal force components generated by film lamination, ensures that the composite film does not deviate, and improves the lamination quality.

[0025] 2. In the present invention, a group of scrapers that can be in contact with the glue roller are provided on the support plate on one side of the glue roller. The scrapers are driven by a reciprocating transverse movement assembly. The reciprocating transverse movement assembly is provided with a ball screw driven by the main equipment and two sets of electric guide rails synchronously arranged with the ball screw. The cylinder drives the scraper plate and the ball screw of the half-cutting structure to separate from the ball screw after completing a stroke on the surface of the ball screw. After resetting, the transverse movement is repeated, thereby realizing the reciprocating movement of the scraper plate. Under the premise of ensuring the roller surface quality of the glue roller, the glue sticking to the surface of the glue roller can be evenly distributed, thereby ensuring that the glue coating of the film is uniform, avoiding the phenomenon of bubbles, wrinkles, etc. that are easily generated during the film composite process, and improving the quality of the finished composite film.

[0026] 3. The present invention provides a compression chamber on one side of the support plate, which is connected to a group of adsorption chambers capable of adsorption to provide adsorption force to the film. When the force of the auxiliary air pressure roller is insufficient, the film can still be glued to the glue roller.

[0027] 4. The rotation of the cam, the ball screw and the stirring rod in the present invention are all driven synchronously by the power of the main equipment, which reduces the cost of the equipment. At the same time, it ensures the synchronization effect of the auxiliary structure and ensures the uniform coating of the glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention;

[0029] Figure 2 It is an exploded schematic diagram of the sliding structure of the airbag and the glue pool of the present invention;

[0030] Figure 3 It is a three-dimensional schematic diagram of the cam installation structure of the present invention;

[0031] Figure 4 It is a schematic diagram of the three-dimensional structure of the air pressure roller of the present invention;

[0032] Figure 5 It is a rear perspective structural diagram of the present invention;

[0033] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part A;

[0034] Figure 7 This is a schematic diagram of the support plate and reciprocating traverse assembly structure of the present invention;

[0035] Figure 8 For the present invention Figure 7 The enlarged structural diagram of part B in the middle;

[0036] Figure 9 It is a schematic diagram of the three-dimensional structure of the guide plate of the present invention;

[0037] Figure 10 This is a schematic diagram of the connection structure between the compression chamber and the adsorption chamber of the present invention;

[0038] Figure 11 It is a schematic diagram of the three-dimensional structure of the stirring rod of the present invention.

[0039] In the figure: 1. Winding roller; 2. Tensioning shaft; 3. Film; 4. Pressing roller; 5. Gluing roller; 6. Glue tank; 7. Gluing roller; 8. Transition roller; 9. Air pressure roller; 10. Air pipe; 11. Air bag; 12. Air outlet pipe; 13. Cam; 14. Support plate; 15. Column; 16. Guide strip; 17. Guide groove; 18. Rotating shaft; 19. Main transmission shaft; 20. Guide wheel; 1101. Upper compression air bag; 1102. Lower compression air bag; 1103. Air bag connecting layer; 1104. Fixed shaft; 901. Blowing hole; 21. Bearing seat; 22. First synchronous pulley; 23. Second synchronous pulley; 24. Adsorption air pipe; 25. Synchronous belt; 26. Third synchronous pulley; 27. Fourth synchronous pulley; 28. Ball screw; 2801. Internal threaded sleeve; 29. ​​Electrical guide rail; 30. Cylinder; 31. Fifth synchronous pulley; 32. Sixth synchronous pulley; 33. Transition drive shaft; 34. Scraper plate; 35. Guide plate; 36. Air chamber; 37. Air nozzle; 38. Air chamber air guide pipe; 39. Adsorption chamber; 40. Suction nozzle; 41. Compression chamber; 42. Moving rod; 43. Photoelectric control switch; 44. Slide; 45. Organ plate; 46. Stirring rod. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] See also Figure 1-11 , the present invention provides a technical solution:

[0042] Example 1:

[0043] See also Figure 1 and Figure 5 , a device for preparing an environmentally friendly and degradable composite film, comprising a winding roller 1, a tensioning shaft 2, a pressure roller 4, a gluing roller 5 and a glue pool 6, and the surfaces of the winding roller 1, the tensioning shaft 2, the pressure roller 4 and the gluing roller 5 are sequentially fitted to convey the film 3 to be laminated, a gluing roller 5 is provided below the pressure roller 4, and the film 3 passes through between the pressure roller 4 and the gluing roller 5. In the prior art, conventional devices for preparing environmentally friendly and degradable composite films mostly include the above-mentioned rollers, and the winding roller 1, the tensioning shaft 2, the pressure roller 4 and the gluing roller 5 are all rotatably installed in the production frame of the environmentally friendly and degradable composite film. The film 3 passes through the above-mentioned rollers in sequence for conveying, and the film to be laminated is released by the winding roller 1, and continues to be conveyed through the tensioning shaft 2, the pressure roller 4 and the gluing roller 5 in sequence. After being evenly coated with glue, it is continued to be conveyed to the drying section and the laminating section, and finally wound up into shape.

[0044] See also Figure 1 and Figure 4 The two ends of the glue roller 5 are rotatably mounted in the glue pool 6 through the bearing seat 21. A glue roller 7 is provided above one side of the glue pool 6. The film 3 is transported by the winding roller 1 to between the pressure roller 4 and the glue roller 5. The glue liquid in the glue pool 6 is rolled onto the surface of the film 3 by the glue roller 5 to complete the gluing. The glue roller 7 is also rotatably mounted in the production frame. The glue roller 7 provided in this embodiment performs glue uniformity treatment on the glued film 3. An air pressure roller 9 is provided on one side of the glue roller 7. An air pressure roller 9 is provided on one side of the air pressure roller 9. An air blowing hole 901 is arranged in an equidistant array on one side of the air pressure roller 9. The air blowing hole 901 is opened toward the glue roller 7. The film 3 passes through between the glue roller 7 and the air pressure roller 9. A rebound airbag 11 is provided on one side of the glue pool 6. The rebound airbag 11 is fixedly connected to the air pressure roller 9. The specific connection structure is as follows: the upper compression airbag 1101 and the lower compression airbag 1102 are connected to an air outlet pipe 12. The air outlet pipe 12 is fixedly connected to the air pressure roller 9 through the connected air supply pipe 10. By squeezing the rebound airbag 11 to discharge the airflow through the blowing hole 901 , the film 3 is pushed to always be in contact with the glue coating roller 7 during the conveying process, ensuring that the glue coating on the film 3 is uniform.

[0045] See also Figure 2 and Figure 3 The rebound airbag 11 includes an upper compression airbag 1101 and a lower compression airbag 1102. An airbag connecting layer 1103 is connected between the upper compression airbag 1101 and the lower compression airbag 1102. One side of the airbag connecting layer 1103 is fixedly connected to the outer wall of the glue pool 6 through a fixed shaft 1104. In this embodiment, the rebound airbag 11 is set as an airbag structure with a fixed middle part and a telescopic structure up and down to ensure that the rotation of the cam 13 is applied to the upper compression airbag 1101 and the lower compression airbag 1102, thereby increasing the compression space and ensuring the air discharge force of the air pressure roller 9. The airbag 11 proposed in this embodiment is provided with a compression spring in the telescopic upper compression airbag 1101 and the lower compression airbag 1102 to ensure that the upper compression airbag 1101 and the lower compression airbag 1102 are always in contact with the edge of the cam 13. When the cam 13 does not provide pressure, a one-way valve is provided in the tube to prevent the air pressure roller 9 from sucking back gas.

[0046] See also Figure 3, both ends of the upper glue roller 5 are connected to the main transmission shaft 19, and the first synchronous pulley 22 is fixedly installed on the surface of the main transmission shaft 19. The inner wall of the glue pool 6 is symmetrically and rotatably installed with a rotating shaft 18, and the second synchronous pulley 23 is fixedly installed on the surface of the rotating shaft 18. The first synchronous pulley 22 and the second synchronous pulley 23 are connected by a synchronous belt 25. The rotating shaft 18 and one end of the main transmission shaft 19 are fixedly installed with a cam 13. In this embodiment, the driving force in the production frame of the environmentally friendly degradable composite film is used to cooperate with the first synchronous pulley 22 and the second synchronous pulley 23 to transmit power, and the main equipment is started. The cam 13 is driven to rotate. Since the edges of the two groups of cams 13 are respectively fitted with the upper compression airbag 1101 and the lower compression airbag 1102, and the upper compression airbag 1101 and the lower compression airbag 1102 are both slidingly connected to the glue pool 6, the rotation of the cam 13 realizes the squeezing of the upper compression airbag 1101 and the lower compression airbag 1102; the gas is squeezed into the air pressure roller 9 to realize the blowing pressure of the film 3 toward the glue coating roller 7, ensuring that the film 3 is always fitted with the surface of the glue coating roller 7 during the glue coating process, ensuring that the glue coating on the surface of the film 3 is uniform, and avoiding the defect of local glue leakage during coating.

[0047] See also Figure 2 The upper compression airbag 1101 and the lower compression airbag 1102 are both slidably connected to the glue pool 6. Guide wheels 20 are arranged in an equidistant array on one side of the upper compression airbag 1101 and the lower compression airbag 1102. Guide bars 16 are provided on one side of the outer wall of the glue pool 6 corresponding to the sliding positions of the guide wheels 20. Guide grooves 17 are provided in the guide bars 16. In this embodiment, in order to improve the smooth movement of the airbag 11 during the compression process, the matching setting of the guide wheel 20 and the guide groove 17 is utilized to ensure that the airbag 11 is compressed smoothly while the compression direction is limited to avoid torque generated by compression and rebound.

[0048] See also Figure 5 and Figure 6 A scraper plate 34 is provided on the side of the glue coating roller 7 away from the air pressure roller 9. The scraper plate 34 and the surface of the glue coating roller 7 are fitted together to ensure that the glue on the surface of the glue coating roller 7 is evenly distributed, thereby ensuring that the glue coating on the film 3 is evenly applied. A reciprocating transverse movement component is provided on one side of the scraper plate 34. The glue coating roller 7, as a glue coating and uniform glue roller, is more likely to produce local accumulation of glue or local empty glue during the rapid film transportation process. In this embodiment, a group of scrapers that can fit with the glue coating roller 7 are provided. The scraper plate 34 is driven to move back and forth by the reciprocating transverse movement component to ensure that the glue sticking to the surface of the glue coating roller 7 can be evenly distributed.

[0049] See also Figure 1 and Figure 7, a plurality of groups of columns 15 are provided on the side of the glue pool 6 near the glue coating roller 7, the top of the column 15 is connected to the support plate 14, and the reciprocating transverse movement component is provided on the surface side of the support plate 14. The reciprocating transverse movement component includes a ball screw 28 rotatably mounted on one side of the support plate 14, a transmission component is provided between the ball screw 28 and the pressure roller 4, and two groups of electric guide rails 29 are respectively provided on the upper and lower sides of the ball screw 28 on one side of the support plate 14. A cylinder 30 is fixedly installed on the slider of the electric guide rail 29, and a scraper plate 34 is also provided as a half-structure cut by the axis. The two groups of scraper plates 34 provided in half are respectively fixedly installed on the output rod end of the cylinder 30, and an internal threaded sleeve 2801 is provided on the surface of the ball screw 28, and the internal threaded sleeve 2801 is provided as an axis. The heart-cut half structure, the two sets of scraper plates 34 set in half and the internal threaded sleeves 2801 set in half are fixedly connected. In this embodiment, the rotation of the pressure roller 4 is used to drive the ball screw 28 to rotate through the transmission assembly. During the rotation of the ball screw 28, the internal threaded sleeve 2801 on its surface moves along the surface of the ball screw 28, thereby driving the scraper plate 34 clamped on the surface of the internal threaded sleeve 2801 to move along the glue coating roller 7. Since the glue coating roller 7 remains in a rotating state, the movement of the scraper plate 34 can evenly scrape the glue on the surface of the glue coating roller 7.

[0050] See also Figure 6 The transmission assembly includes a third synchronous pulley 26 and a fourth synchronous pulley 27. A transition drive shaft 33 is rotatably installed on one side of the support plate 14. The third synchronous pulley 26 is fixedly installed on one end of the pressure roller 4, and the fourth synchronous pulley 27 is fixedly installed on one end of the transition drive shaft 33. The third synchronous pulley 26 and the fourth synchronous pulley 27 are transmission connected. The other end of the transition drive shaft 33 is fixedly installed with a sixth synchronous pulley 32, and one end of the ball screw 28 is fixedly installed with a fifth synchronous pulley 31. The fifth synchronous pulley 31 and the sixth synchronous pulley 32 are transmission connected. In this embodiment, through the above four sets of synchronous belts and the transition drive shaft 33, the function of driving the ball screw 28 to rotate when the main equipment is started is realized.

[0051] See also Figure 8, the support plate 14 is located at both ends of the electrical guide rail 29 and is provided with a photoelectric control switch 43, the photoelectric control switch 43 is electrically connected to the cylinder 30, and can control the opening and closing of the scraper plate 34, the action direction of the ball screw 28 is single, and if the scraper plate 34 is always in contact with the glue roller 7 while reciprocating, the long-term action will cause certain wear to the glue roller 7. Therefore, the scraper plate 34 is set to an axis-cut half structure, and the two sets of scraper plates 34 set in half are respectively fixedly installed on the output of the cylinder 30. At the rod end, when the scraper plate 34 moves to the end, the photoelectric control switch 43 senses and controls the cylinder 30 to retract, and drives the scraper plate 34 and the internal threaded sleeve 2801 to reset. The reset end is also provided with another set of photoelectric control switches 43, which can control the telescopic rod of the cylinder 30 to extend, tighten the scraper plate 34 and the internal threaded sleeve 2801 and the ball screw 28 to match, and repeat the above steps, which can not only make the scraper plate 34 evenly coat the glue on the glue roller 7, but also reduce the wear of the scraper plate 34 on the glue roller 7 as much as possible.

[0052] See also Figure 11 Considering that the glue in the glue pool 6 may precipitate during operation, which may affect the quality of the glue, a stirring rod 46 is provided between the two sets of rotating shafts 18. During the rotation of the glue roller 5, the stirring rod 46 can be driven to rotate in the glue pool 6, effectively preventing the glue from precipitating.

[0053] Example 2:

[0054] See also Figure 10Based on the first embodiment, only the blowing force of the air pressure roller 9 is used to push the film 3 close to the surface of the glue coating roller 7 for glue coating. Since the air bag 11 is squeezed by the rotation of the cam 13, the squeezing force is the smallest when the lower surface of the cam 13 is the lowest, the squeezing stroke is the shortest, and the gap between the strokes is compressed. Therefore, this embodiment is provided to add a group of compression chambers 41, which are connected to the adsorption chamber 39. The slider of the electric guide rail 29 is always moved back and forth to drive the piston plate in the compression chamber 41 to move, and the air in the chamber is compressed back and forth, and the gas in the compression chamber 41 is squeezed back and forth in intervals. The control of the one-way valve provided in the adsorption air pipe 24 ensures that the compression chamber 41 only performs air suction processing and does not release gas. A compression chamber 41 is provided on one side of the support plate 14, and a The slide groove 44 has a moving rod 42 slidingly installed in the slide groove 44, and an accordion plate 45 is installed in the slide groove 44. One end of the moving rod 42 extends into the compression chamber 41 and is fixedly connected to the piston plate in the compression chamber 41. The other end of the moving rod 42 is slidably and fixedly connected to the electrical guide rail 29. In this embodiment, the accordion plate 45 is used to block the slide groove 44 to ensure the sealing of the entire compression chamber 41, so that the movement of the piston rod can achieve the suction effect. The compression chamber 41 is fixedly connected to the adsorption chamber 39 through the adsorption air pipe 24. The air chamber air guide pipe 38 and the adsorption air pipe 24 are both arranged at the two end ends of the compression chamber 41. There are suction nozzles 40 in an equidistant array on one side of the adsorption chamber 39. The suction nozzle 40 can apply adsorption force to the film being transported, assisting the function of the air pressure roller 9, so that the film is always in contact with the glue coating roller 7 for coating.

[0055] Example 3:

[0056] See also Figure 9 Based on the first embodiment, during the action of the scraper plate 34, the excess glue on the surface of the glue coating roller 7 may be scraped off, and the excess glue may drip onto other structures of the equipment, causing difficulty in cleaning. Therefore, a glue diversion device is provided in this embodiment to make it flow back into the glue pool 6. Specifically, a guide plate 35 is provided on one side of the support plate 14 near the glue pool 6 to collect the glue. At the same time, since the glue has a certain concentration, it may flow slowly on the surface of the guide plate 35 or dry up before being recovered. Therefore, the compression chamber 41 in the second embodiment is used. The compression chamber 41 is fixedly connected to the air chamber 36 through the air chamber air guide pipe 38. The air chamber 36 is provided at the joint position of the guide plate 35 and the support plate 14. An air nozzle 37 on one side of the air chamber 36 matches the inclination angle of the guide plate 35, which can blow the glue collected on the surface of the guide plate 35 into the glue pool 6 in time.

[0057] A preparation method, based on the above-mentioned preparation device of an environmentally friendly degradable composite film, comprises the following steps:

[0058] S1: Start the production equipment of environmentally friendly degradable composite film, and the winding roller 1, tensioning shaft 2, pressure roller 4, and gluing roller 5 all start to rotate. The film 3 in the winding roller 1 is sequentially conveyed to the above rollers to start gluing;

[0059] S2: The rotation of the glue roller 5 drives the two sets of cams 13 to squeeze the upper compression airbag 1101 and the lower compression airbag 1102 respectively, so that the gas in the rebound airbag 11 is blown to the film 3 through the air pressure roller 9. During the conveying process of the film 3, it is always in contact with the glue roller 7;

[0060] S3: The pressure roller 4 rotates, and the ball screw 28 is driven to rotate through the transmission assembly, thereby driving the scraper plate 34 to contact the glue roller 7 to scrape the glue on the surface of the glue roller 7. During the action of the glue roller 7, the glue on the surface of the glue roller 7 is prevented from being locally accumulated, thereby ensuring uniform glue coating on the film 3.

[0061] S4: A set of compression chambers 41 is provided on one side of the support plate 14. The adsorption chamber 39 connected thereto cooperates with the blowing force of the air pressure roller 9 to provide adsorption force, thereby better fitting the film 3 and the glue coating roller 7 and ensuring uniform glue coating.

[0062] S5: The glue-coated film 3 is heated in a drying box and then pressed together with another set of films and rolled up to form a composite film.

[0063] Working principle: start the main equipment, the winding roller 1, the tensioning shaft 2, the pressure roller 4, the gluing roller 5, and the gluing roller 7 all start to rotate, the winding roller 1 releases the film 3, and the film 3 passes through the tensioning shaft 2, the pressure roller 4, the gluing roller 5 in turn to reach the gluing roller 7. During the rotation of the gluing roller 5, the cam 13 is driven to rotate. Since compression springs are provided in the retractable upper compression airbag 1101 and the lower compression airbag 1102, it is ensured that the upper compression airbag 1101 and the lower compression airbag 1102 are always in contact with the edge of the cam 13. Therefore, the cam 13 rotates to compress the upper compression airbag 1101 and the lower compression airbag 1102, and the extruded gas is blown toward the film 3, so that the film 3 is always in contact with the gluing roller 7 when passing through the gluing roller 7, ensuring uniform gluing.

[0064] When the pressure roller 4 rotates, it drives the third synchronous pulley 26 to rotate, and drives the transition drive shaft 33 connected to the fourth synchronous pulley 27 to rotate through the belt transmission, and at the same time drives the sixth synchronous pulley 32 to rotate, and also drives the fifth synchronous pulley 31 to rotate through the belt transmission, thereby driving the ball screw 28 to rotate. During the rotation of the ball screw 28, the internal threaded sleeve 2801 on its surface moves along the surface of the ball screw 28, thereby driving the scraper plate 34 clamped on the surface of the internal threaded sleeve 2801 to move along the glue coating roller 7. Since the glue coating roller 7 keeps rotating, the movement of the scraper plate 34 can evenly apply the glue on the surface of the glue coating roller 7.

[0065] Since the rotation of the ball screw 28 causes the internal threaded sleeve 2801 to move in one direction, in order to make the internal threaded sleeve 2801 drive the scraper plate 34, the cylinder 30 is used to control the internal threaded sleeve 2801 and the scraper plate 34 that have been cut in half to return to their original position by the electrical guide rail 29. During the movement of the electrical guide rail 29, the moving rod 42 is driven to slide in the slide groove 44, thereby moving the piston rod in the compression chamber 41. The compression chamber 41 forms a negative pressure, which enables the adsorption chamber 39 to adsorb the film 3, making up for the missing gap of the cam 13. When the force applied by the cam 13 is insufficient, the air pressure roller 9 can still make the film always adhere to the glue coating roller 7 for glue coating;

[0066] At the same time, the negative pressure generated in the compression chamber 41 and the accumulated gas are transported to the air chamber 36 through the air chamber air guide pipe 38, and blown to the surface of the guide plate 35 through the air nozzle 37, so that the collected glue liquid is blown into the glue pool 6 in time, thereby accelerating the flow speed of the glue liquid on the guide plate 35.

[0067] It should be noted that both the adsorption gas pipe 24 and the gas chamber gas guide pipe 38 are provided with a one-way valve to ensure that no gas reaction occurs according to their needs for air flow.

[0068] It should be noted that the electrical guide rail 29, the cylinder 30 and the photoelectric control switch 43 are devices or equipment existing in the prior art, or are devices or equipment that can be realized in the prior art. Their power supply, specific composition and principles are clear to those skilled in the art, so they will not be described in detail.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing an environmentally friendly degradable composite film, comprising a winding roller (1), a tensioning shaft (2), a pressure roller (4), a glue roller (5) and a glue pool (6), wherein the winding roller (1), the tensioning shaft (2), the pressure roller (4) and the glue roller (5) are all rotatably installed in a production frame of the environmentally friendly degradable composite film, and the surfaces of the winding roller (1), the tensioning shaft (2), the pressure roller (4) and the glue roller (5) are sequentially contacted with and conveyed to be pressed film (3), a glue roller (5) is arranged below the pressure roller (4), the film (3) runs through between the pressure roller (4) and the glue roller (5), and the glue roller (5) is rotatably installed in the glue pool (6), characterized in that: A glue coating roller (7) is arranged above one side of the glue pool (6), and the glue coating roller (7) is also rotatably installed in the production frame. An air pressure roller (9) is arranged on one side of the glue coating roller (7), and an air pressure roller (9) is arranged on one side of the air pressure roller (9) with blowing holes (901) arranged in an equidistant array, and the opening direction of the blowing holes (901) is toward the glue coating roller (7). The film (3) runs through between the glue coating roller (7) and the air pressure roller (9). A rebound airbag (11) is arranged on one side of the glue pool (6), and the rebound airbag (11) and the air pressure roller (9) are fixedly connected. The rebound airbag (11) is squeezed by an extrusion assembly arranged at one end of the glue roller (5) to discharge the airflow through the blowing holes (901) to push the film (3) to always fit with the glue coating roller (7) during the conveying process, thereby ensuring that the glue coating of the film (3) is uniform. A scraper plate (34) is arranged on the side of the glue coating roller (7) away from the air pressure roller (9). The scraper plate (34) and the surface of the glue coating roller (7) are arranged in close contact with each other, which can ensure that the glue on the surface of the glue coating roller (7) is evenly distributed, thereby ensuring that the glue coating on the film (3) is even. A reciprocating transverse movement component is arranged on one side of the scraper plate (34).

2. The device for preparing an environmentally friendly degradable composite film according to claim 1, characterized in that: Both ends of the glue roller (5) are connected to a main transmission shaft (19), a first synchronous pulley (22) is fixedly mounted on the surface of the main transmission shaft (19), a rotating shaft (18) is symmetrically and rotatably mounted on the inner wall of the glue pool (6), a second synchronous pulley (23) is fixedly mounted on the surface of the rotating shaft (18), the first synchronous pulley (22) and the second synchronous pulley (23) are connected by a synchronous belt (25), and a cam (13) is fixedly mounted on one end of the rotating shaft (18) and the main transmission shaft (19).

3. The device for preparing an environmentally friendly degradable composite film according to claim 2, characterized in that: The rebound airbag (11) comprises an upper compression airbag (1101) and a lower compression airbag (1102), an airbag connecting layer (1103) is connected between the upper compression airbag (1101) and the lower compression airbag (1102), one side of the airbag connecting layer (1103) is fixedly connected to the outer wall of the glue pool (6) through a fixed shaft (1104), the upper compression airbag (1101) and the lower compression airbag (1102) are both slidably connected to the glue pool (6), the two groups of cam (13) edges are respectively arranged to fit the upper compression airbag (1101) and the lower compression airbag (1102), the upper compression airbag (1101) and the lower compression airbag (1102) are connected to an air outlet pipe (12), and the air outlet pipe (12) is fixedly connected to the air pressure roller (9) through an air supply pipe (10) and an air pressure roller (9) arranged in a connecting manner.

4. The device for preparing an environmentally friendly degradable composite film according to claim 3, characterized in that: Guide wheels (20) are arranged in an equidistant array on one side of the upper compression airbag (1101) and the lower compression airbag (1102), and guide bars (16) are arranged on one side of the outer wall of the glue pool (6) corresponding to the sliding positions of the guide wheels (20), and guide grooves (17) are provided in the guide bars (16).

5. The device for preparing an environmentally friendly degradable composite film according to claim 1, characterized in that: A plurality of groups of columns (15) are arranged on one side of the glue pool (6) close to the glue coating roller (7); the top of the column (15) is connected to a support plate (14); the reciprocating transverse movement assembly is arranged on one side of the surface of the support plate (14); and the two ends of the glue coating roller (5) are rotatably installed in the glue pool (6) through a bearing seat (21).

6. The device for preparing an environmentally friendly degradable composite film according to any one of claims 1 or 5, characterized in that: The reciprocating transverse movement assembly comprises a ball screw (28) rotatably mounted on one side of a support plate (14); a transmission assembly is arranged between the ball screw (28) and the pressure roller (4); two sets of electrical guide rails (29) are arranged on one side of the support plate (14) at the upper and lower sides of the ball screw (28), respectively; a cylinder (30) is fixedly mounted on a slider of the electrical guide rail (29); the scraper plate (34) is also arranged as an axially cut half structure; the two sets of scraper plates (34) arranged in half are respectively fixedly mounted on the output rod ends of the cylinder (30).

7. The device for preparing an environmentally friendly degradable composite film according to claim 6, characterized in that: The transmission assembly comprises a third synchronous pulley (26) and a fourth synchronous pulley (27); a transition drive shaft (33) is rotatably mounted on one side of the support plate (14); the third synchronous pulley (26) is fixedly mounted on one end of the pressure roller (4); the fourth synchronous pulley (27) is fixedly mounted on one end of the transition drive shaft (33); the third synchronous pulley (26) and the fourth synchronous pulley (27) are transmission-connected; a sixth synchronous pulley (32) is fixedly mounted on the other end of the transition drive shaft (33); and a fifth synchronous pulley (33) is fixedly mounted on one end of the ball screw (28). 1), the fifth synchronous pulley (31) and the sixth synchronous pulley (32) are transmission-connected, the surface of the ball screw (28) is provided with an internal thread sleeve (2801), the internal thread sleeve (2801) is provided with an axially cut half structure, the two groups of scraper plates (34) arranged in half and the internal thread sleeves (2801) arranged in half are fixedly connected, the support plate (14) is provided with photoelectric control switches (43) at both ends of the electrical guide rail (29), the photoelectric control switch (43) is electrically connected to the cylinder (30), and can control the opening and closing of the scraper plates (34).

8. The device for preparing an environmentally friendly degradable composite film according to claim 5, characterized in that: A compression chamber (41) is provided on one side of the support plate (14), a slide groove (44) is provided on one side of the compression chamber (41), a moving rod (42) is slidably installed in the slide groove (44), an accordion plate (45) is installed in the slide groove (44), one end of the moving rod (42) extends into the compression chamber (41) and is fixedly connected to the piston plate in the compression chamber (41), and the other end of the moving rod (42) is slidably and fixedly connected to the electrical guide rail (29). The compression chamber (41) is fixedly connected to the air chamber (36) through the air chamber air guide pipe (38); a guide plate (35) is arranged on one side of the support plate (14) near the glue pool (6); the air chamber (36) is arranged at a joint position between the guide plate (35) and the support plate (14); an air nozzle (37) is arranged on one side of the air chamber (36) to match the inclination angle of the guide plate (35), so as to blow the glue liquid collected on the surface of the guide plate (35) into the glue pool (6).

9. The device for preparing an environmentally friendly degradable composite film according to claim 8, characterized in that: The compression chamber (41) is fixedly connected to the adsorption chamber (39) via the adsorption air pipe (24); the air chamber air guide pipe (38) and the adsorption air pipe (24) are both arranged at the ends of the compression chamber (41); and suction nozzles (40) are arranged in an equidistant array on one side of the adsorption chamber (39); the suction nozzles (40) can exert an adsorption force on the film being transported, so that the film is always in contact with the glue coating roller (7) for gluing.

10. A preparation method, based on the preparation device of an environmentally friendly degradable composite film according to any one of claims 1 to 9, characterized in that: The discharging steps include: S1: Start the production equipment of the environmentally friendly degradable composite film, the winding roller (1), the tensioning shaft (2), the pressure roller (4), and the gluing roller (5) all start to rotate, and the film (3) in the winding roller (1) is sequentially conveyed in contact with the above rollers to start gluing; S2: The rotation of the glue roller (5) drives the two groups of cams (13) to squeeze the upper compression airbag (1101) and the lower compression airbag (1102) respectively, so that the gas in the rebound airbag (11) is blown toward the film (3) through the air pressure roller (9), and the film (3) is always in contact with the glue roller (7) during the transmission process; S3: The pressure roller (4) rotates, and the ball screw (28) is driven to rotate through the transmission assembly, thereby driving the scraper plate (34) to fit the glue coating roller (7) to scrape the glue on the surface of the glue coating roller (7), so that during the action of the glue coating roller (7), the glue on the surface of the glue coating roller (7) can be prevented from being locally accumulated, thereby ensuring that the glue coating on the film (3) is uniform; S4: A group of compression chambers (41) are arranged on one side of the support plate (14), and an adsorption chamber (39) connected thereto cooperates with the blowing force of the air pressure roller (9) to provide adsorption force, so as to better fit the film (3) and the glue coating roller (7) and ensure uniform glue coating; S5: The glue-coated film (3) is heated in a drying box and then pressed with another set of films and rolled up to form a composite film.

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