Process and apparatus for the production of a tear-resistant polyethylene film

Abstract

The present application relates to polyethylene film processing technical field, and disclose a kind of tear-resistant polyethylene film preparation equipment, including frame, two power rollers are rotatably connected in the frame, two The power roller is located at the position of the frame two sides respectively, the present application also proposes a kind of tear-resistant polyethylene film preparation method, comprising the following steps: S1: by knob rotation two-way screw rod, two-way screw rod is driven two clamping plate frame to move towards by thread engagement between two clamping plate frame, two clamping plate frame will move on power roller and auxiliary roller.The present application not only can be placed to different width film and spread glue, need not to replace roller, save time, improve efficiency, but also can prevent the glue in glue tank from solidification, improve the use effect of glue, also can be shielded to the blanking port on the glue tank outside film, so as to avoid glue waste, save cost.

Description

Technical Field

[0001] This invention relates to the field of polyethylene film processing technology, specifically to a method and equipment for preparing tear-resistant polyethylene film. Background Technology

[0002] Polyethylene film, also known as PE film, can be manufactured into products with different properties, such as low-density, medium-density, high-density polyethylene and cross-linked polyethylene, depending on the manufacturing method and control measures. Among them, low-density polyethylene film is a semi-transparent, glossy, and relatively soft film.

[0003] Currently, low-density polyethylene (LDPE) films commonly found on the market are mostly used as the inner layer of composite bags and in the packaging of cosmetics, pickles, and pastries. To maintain their tear resistance, they are usually prepared by combining multiple layers of film, with each layer bonded together using adhesive. However, existing adhesive application equipment has rollers of fixed size. When applying adhesive to films of different widths, the equipment needs to be stopped and different rollers need to be replaced, making equipment adjustment time-consuming and labor-intensive. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a method and equipment for preparing tear-resistant polyethylene film. The main purpose is to solve the problem that the size of the rollers placed in the glue application equipment is fixed, and when applying glue to films of different widths, the equipment needs to be stopped and different rollers need to be replaced, resulting in time-consuming and labor-intensive equipment adjustments.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A tear-resistant polyethylene film preparation device includes a frame. Two power rollers are rotatably connected within the frame, located on opposite sides of the frame. An auxiliary roller is rotatably connected within the frame at the center of the two power rollers. Multiple guide rods are fixedly connected within the frame. A slide is slidably connected to the outer circumference of two opposing guide rods. A tension roller is rotatably connected within the slide. Tension springs are sleeved on the outer circumference of each guide rod, with both ends of the springs fixed to the slide and the frame, respectively. Two clamping frames are provided within the frame. The drive assembly for moving two clamping frames includes multiple clearance grooves at the bottom of each clamping frame to allow the power roller, auxiliary roller, and tension roller to pass through. Two springs are fixedly connected to the top of each clamping frame, and a U-shaped frame is fixedly connected to the top of each spring. A semi-circular plate supporting the tension roller is fixedly connected to the bottom of the U-shaped frame through the clamping frame. Two fixing frames are fixedly connected to the top of the frame, and a feeding assembly is provided at the top of the two fixing frames to allow adhesive to fall onto the film. A leveling assembly is provided inside the frame to evenly distribute the adhesive on the film.

[0009] Furthermore, the feeding assembly includes a glue tank, which is fixedly connected to the top of two fixed frames and located directly above the auxiliary roller. The bottom of the glue tank has multiple second feeding ports. A sliding plate is slidably connected inside the glue tank below the second feeding ports. The upper surface of the sliding plate has multiple first feeding ports penetrating the sliding plate, and the first feeding ports are aligned with the second feeding ports. The sliding plate is fixed to the glue tank by bolts. The glue tank is equipped with a stirring assembly to allow the glue to flow. A sealing assembly is provided above the clamping frame to block the feeding of the glue tank.

[0010] Based on the aforementioned scheme, the stirring assembly includes a motor, which is fixedly connected to one side of the outer wall of the glue tank, and one end of the motor output shaft passes through the glue tank and is fixedly connected to a stirring frame.

[0011] As a further embodiment of the present invention, the enclosing assembly includes two fixing plates, which are respectively fixedly connected to the top of two clamping frames. Each of the two fixing plates has a baffle fixedly connected to its top. The baffle is composed of multiple square plates hinged together. Two support rods are fixedly connected inside the fixing frame. The baffle passes around the support rods to guide the baffle.

[0012] Furthermore, the leveling assembly includes multiple first connecting seats and multiple second connecting seats, which are staggered and spaced apart. Scrapers are rotatably connected between adjacent first and second connecting seats and between the first connecting seat and the clamping frame. A fixing rod is fixedly connected between two fixed frames, and the fixing rod passes through multiple second connecting seats. Two limiting plates are fixedly connected to opposite sides of the two fixed frames. A guide rail is fixedly connected between adjacent two limiting plates. A sliding rod is slidably connected to the outside of the guide rail, and the sliding rod passes through the first connecting seat. Two guide platforms are fixedly connected inside the frame, and the two guide platforms are located on both sides of the auxiliary roller. Multiple first and second connecting seats are located above one of the guide platforms and have gaps between them.

[0013] Based on the aforementioned solution, the drive assembly includes a bidirectional lead screw, which is rotatably connected to the inner wall of one side of the frame. The bidirectional lead screw passes through two clamping frames and is threadedly connected to the two clamping frames. One end of the bidirectional lead screw passes through the frame and is fixedly connected to a knob.

[0014] As a further embodiment of the present invention, the top of the glue box is hinged with a cover plate.

[0015] Furthermore, the top of the semi-arc plate is provided with multiple mounting grooves, and each of the multiple mounting grooves is provided with ball bearings.

[0016] This invention also proposes a method for using a tear-resistant polyethylene film preparation device, comprising the following steps:

[0017] S1: By rotating the knob, the bidirectional lead screw will engage with the two clamping frames through the thread, causing the two clamping frames to move in opposite directions. The two clamping frames will move on the power roller and the auxiliary roller, thereby changing the width of the film placed on the power roller and the auxiliary roller.

[0018] S2: The two clamping frames will move the semi-arc plate through the U-shaped frame, changing the width of the film placed on the tension roller;

[0019] S3: The film is placed by passing it over the power roller, below the tension roller, and above the auxiliary roller. At this time, the clamping frame and the semi-arc plate will block and limit the film to prevent it from moving.

[0020] S4: Under the action of film tension, the tension roller will drive the carriage to move upward along the guide rod. The carriage will stretch the tension spring, so that the film is in a taut state. The spring in a compressed state will cause the U-shaped frame to drive the semi-arc plate to move upward, so that the semi-arc plate and the tension roller move synchronously, so that the semi-arc plate keeps the film in a limited position. This allows the width of the film placed on the power roller, auxiliary roller and tension roller to be changed, and adhesive can be applied to films of different widths.

[0021] S5: During the movement of the clamping frame, the fixed plate will move, and the fixed plate will move the baffle, so that the baffle blocks and closes the first feeding port outside the film, thus preventing the first feeding port outside the film from feeding and avoiding waste of glue.

[0022] S6: During the movement of the clamping frame, multiple scrapers will fold. The scrapers will rotate between the clamping frame, the first connecting seat and the second connecting seat. During the folding process, the first connecting seat will move along the guide rail via the slide rod.

[0023] S7: The first connecting seat moves along the slide bar, and the second connecting seat moves along the fixed bar, so that the scraper can smooth the glue on films of different widths.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, the present invention provides a method and equipment for preparing tear-resistant polyethylene film, which has the following beneficial effects:

[0026] 1. By using the clamping frame and the semi-arc plate together, the two clamping frames move towards each other through the drive assembly. The two clamping frames drive the semi-arc plate to move, thereby changing the width of the film placed on the power roller, auxiliary roller and tension roller. Films of different widths can be placed and glued without changing the rollers, saving time and improving efficiency.

[0027] 2. The mixing component can agitate the glue in the glue tank, causing it to flow and preventing it from solidifying, thus improving the glue's performance.

[0028] 3. By setting up the sealing component, when the width of the film placed on the power roller, auxiliary roller and tension roller is changed, the sealing component can block and seal the feeding port on the glue box located outside the film, thereby avoiding glue waste and saving costs.

[0029] 4. By using the leveling component, the adhesive that falls onto the film can be leveled, thus ensuring that the adhesive is evenly distributed on the film and preventing uneven thickness of the adhesive, thereby improving the adhesive coating effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the upper three-dimensional structure of a tear-resistant polyethylene film preparation device proposed in this invention;

[0031] Figure 2 This is a schematic diagram of the lower three-dimensional structure of a tear-resistant polyethylene film preparation device proposed in this invention;

[0032] Figure 3 This is an enlarged schematic diagram of the frame structure of a tear-resistant polyethylene film preparation device proposed in this invention;

[0033] Figure 4 This is a partially enlarged structural schematic diagram of a tear-resistant polyethylene film preparation device proposed in this invention;

[0034] Figure 5 This is an enlarged structural diagram of part A of the tear-resistant polyethylene film preparation equipment proposed in this invention;

[0035] Figure 6 This is an enlarged schematic diagram of the connecting seat structure of a tear-resistant polyethylene film preparation device proposed in this invention;

[0036] Figure 7 This is an enlarged schematic diagram of the glue box structure of a tear-resistant polyethylene film preparation device proposed in this invention;

[0037] Figure 8 This is a schematic cross-sectional view of the glue box structure of a tear-resistant polyethylene film preparation device proposed in this invention.

[0038] In the diagram: 1. Frame; 2. Tension spring; 3. Fixing frame; 4. Guide rod; 5. Slide; 6. Clamping frame; 7. Cover plate; 8. Glue box; 9. Tension roller; 11. Double-acting lead screw; 12. Semi-arc plate; 13. Power roller; 14. Guide platform; 15. Auxiliary roller; 16. Support rod; 17. U-shaped frame; 18. Fixing plate; 19. Scraper; 20. Spring; 21. Alternating groove; 22. Baffle; 23. Ball bearing; 24. Guide rail; 25. Limiting plate; 26. Slide rod; 27. First connecting seat; 28. Slide plate; 29. ​​First discharge port; 30. Second discharge port; 31. Mixing frame; 32. Fixing rod; 33. Second connecting seat. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Reference Figures 1-8 A tear-resistant polyethylene film preparation device includes a frame 1. Two power rollers 13 are rotatably connected inside the frame 1, located on opposite sides of the frame 1. An auxiliary roller 15 is rotatably connected inside the frame 1 at the center of the two power rollers 13. Multiple guide rods 4 are welded inside the frame 1. A slide frame 5 is slidably connected to the outer circumference of two opposing guide rods 4. A tension roller 9 is rotatably connected inside the slide frame 5. Tension springs 2 are sleeved on the outer circumference of each of the multiple guide rods 4, with both ends of the tension springs 2 fixed to the slide frame 5 and the frame 1, respectively. Two clamping frames are provided inside the frame 1. 6. The frame 1 is equipped with a drive assembly for moving two clamping frames 6. The bottom of each clamping frame 6 has multiple clearance grooves 21 to allow the power roller 13, auxiliary roller 15, and tension roller 9 to move. Two springs 20 are welded to the top of each clamping frame 6, and a U-shaped frame 17 is welded to the top of each spring 20. The bottom end of the U-shaped frame 17 passes through the clamping frame 6 and is welded with a semi-arc plate 12 to support the tension roller 9. Two fixing frames 3 are bolted to the top of the frame 1. A feeding assembly is provided on the top of the two fixing frames 3 to allow the adhesive to fall onto the film. The frame 1 is equipped with... A leveling component that evenly distributes adhesive on the film uses a drive assembly to move two clamping frames 6 in opposite directions. These clamping frames 6 move along the power roller 13 and auxiliary roller 15, thus changing the width of the film placed on the power roller 13 and auxiliary roller 15. Simultaneously, the two clamping frames 6 move the semi-arc plate 12 via the U-shaped frame 17, thereby changing the width of the film placed on the tension roller 9. The film is then placed by passing it over the power roller 13, below the tension roller 9, and above the auxiliary roller 15. At this point, the clamping frames 6 and the semi-arc plate 12 will... The tension roller 9, under the action of the tensioning roller 17, moves the slide 5 upward along the guide rod 4, thus preventing the film from moving. The slide 5 stretches the tension spring 2, keeping the film taut. The compressed spring 20 causes the U-shaped frame 17 to move the semi-arc plate 12 upward, thus moving the semi-arc plate 12 synchronously with the tension roller 9. This keeps the semi-arc plate 12 in a limiting position on the film, allowing the width of the film placed on the power roller 13, auxiliary roller 15, and tension roller 9 to be changed. Films of different widths can be placed and glued without changing the rollers.

[0041] The drive assembly includes a bidirectional lead screw 11, which is rotatably connected to the inner wall of one side of the frame 1. The bidirectional lead screw 11 passes through two clamping plates 6 and is threadedly connected to the two clamping plates 6. One end of the bidirectional lead screw 11 passes through the frame 1 and is welded with a knob. By rotating the bidirectional lead screw 11 through the knob, the bidirectional lead screw 11 will drive the two clamping plates 6 to move in opposite directions through the thread engagement between the two clamping plates 6 and the screw.

[0042] In this invention, the feeding assembly includes a glue tank 8, which is bolted to the top of two fixed frames 3 and positioned directly above the auxiliary roller 15. The bottom of the glue tank 8 has multiple second feeding ports 30. A sliding plate 28 is slidably connected inside the glue tank 8 below the second feeding ports 30. The upper surface of the sliding plate 28 has multiple first feeding ports 29 penetrating the sliding plate 28, with the first feeding ports 29 aligned with the second feeding ports 30. The sliding plate 28 is bolted to the glue tank 8. The glue inside the glue tank 8 falls onto the film through the second feeding ports 30 and the first feeding ports 29, thus feeding the glue. Simultaneously, the sliding plate 28 can move within the glue tank 8, changing the connection between the first feeding ports 29 and the second feeding ports 30, thereby adjusting the amount of glue fed. A stirring assembly is provided inside the glue tank 8 to facilitate glue flow. A sealing assembly is provided above the clamping frame 6 to block the feeding from the glue tank 8. The stirring assembly includes... The assembly includes a motor, which is bolted to the outer wall of the glue tank 8. One end of the motor output shaft passes through the glue tank 8 and is bolted to a stirring frame 31. The motor drives the stirring frame 31 to rotate, which agitates the glue and prevents it from solidifying. The sealing assembly includes two fixing plates 18, which are welded to the top of two clamping frames 6. Each fixing plate 18 has a baffle 22 welded to its top, and the baffle 22 contacts the sliding plate 28. The baffle 22 is composed of multiple square plates hinged together. Two support rods 16 are welded inside the fixing frame 3. The baffle 22 passes around the support rods 16 and is guided. During the movement of the clamping frame 6, the fixing plates 18 are moved, which in turn move the baffle 22, causing the baffle 22 to block and close the first discharge port 29 located outside the film, thus preventing the first discharge port 29 from discharging and avoiding glue waste.

[0043] Specifically, the leveling assembly includes multiple first connecting seats 27 and multiple second connecting seats 33, which are staggered. Scrapers 19 are rotatably connected between adjacent first connecting seats 27 and second connecting seats 33, and between a first connecting seat 27 and a clamping frame 6. A fixing rod 32 is welded between two fixed frames 3, and the fixing rod 32 passes through multiple second connecting seats 33. Two limiting plates 25 are welded to opposite sides of each of the two fixed frames 3. A guide rail 24 is bolted between adjacent two limiting plates 25. A sliding rod 26 is slidably connected to the outside of the guide rail 24, and the sliding rod 26 passes through a first connecting seat 27. Two guide platforms 14 are bolted inside the frame 1, and the two guide platforms 14 are located on both sides of the auxiliary roller 15. The multiple first connecting seats 27 and second connecting seats 33 are rotatably connected to each other. Each seat 33 is located above one of the guide platforms 14 and has a gap between it and the guide platform 14. During the movement of the clamping frame 6, multiple scrapers 19 will be folded. The scrapers 19 will rotate with the frame 1, the first connecting seat 27 and the second connecting seat 33. During the folding process, the scrapers 19 will cause the first connecting seat 27 to move along the guide rail 24 via the slide rod 26. At the same time, the first connecting seat 27 will move along the slide rod 26, and the second connecting seat 33 will move along the fixed rod 32. This allows the scrapers 19 to scrape the glue on films of different widths. The top of the glue box 8 is hinged with a cover plate 7. The top of the semi-arc plate 12 has multiple mounting slots. Each mounting slot is equipped with a ball bearing 23, and the ball bearing 23 is in contact with the tension roller 9. The ball bearing 23 can reduce the friction when the tension roller 9 rotates.

[0044] This invention also proposes a method for using a tear-resistant polyethylene film preparation device, comprising the following steps:

[0045] S1: By rotating the double-acting screw 11 with the knob, the double-acting screw 11 will drive the two clamping frames 6 to move in opposite directions through the thread engagement between the screw 11 and the two clamping frames 6. The two clamping frames 6 will move on the power roller 13 and the auxiliary roller 15, thereby changing the width of the film placed on the power roller 13 and the auxiliary roller 15.

[0046] S2: The two clamping frames 6 will move the semi-arc plate 12 through the U-shaped frame 17, changing the width of the film placed on the tension roller 9;

[0047] S3: The film is placed by passing it over the top of the power roller 13, the bottom of the tension roller 9, and the top of the auxiliary roller 15. At this time, the clamping frame 6 and the semi-arc plate 12 will block and limit the film to prevent it from moving.

[0048] S4: Under the action of film tension, the tension roller 9 will drive the slide 5 to move upward along the guide rod 4. The slide 5 will stretch the tension spring 2, so that the film is in a taut state. The spring 20, which is in a compressed state, will cause the U-shaped frame 17 to drive the semi-arc plate 12 to move upward, so that the semi-arc plate 12 and the tension roller 9 move synchronously, so that the semi-arc plate 12 keeps the film in a limited position. This allows the width of the film placed on the power roller 13, the auxiliary roller 15 and the tension roller 9 to be changed, and adhesive can be applied to films of different widths.

[0049] S5: During the movement of the clamping frame 6, the fixing plate 18 will be moved, and the fixing plate 18 will move the baffle 22, so that the baffle 22 will block and close the first feeding port 29 located outside the film, thereby preventing the first feeding port 29 located outside the film from feeding material and avoiding waste of glue.

[0050] S6: During the movement of the clamping frame 6, multiple scrapers 19 will be folded. The scrapers 19 will rotate between the clamping frame 6, the first connecting seat 27 and the second connecting seat 33. During the folding process, the scrapers 19 will cause the first connecting seat 27 to move along the guide rail 24 via the slide rod 26.

[0051] S7: The first connecting seat 27 will move along the slide bar 26, and the second connecting seat 33 will move along the fixed bar 32, so that the scraper 19 can scrape the glue on the film of different widths.

[0052] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0053] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A tear-resistant polyethylene film preparation device, comprising a frame (1), characterized in that, Two power rollers (13) are rotatably connected inside the frame (1), and the two power rollers (13) are located on both sides of the frame (1). An auxiliary roller (15) is rotatably connected inside the frame (1) at the center of the two power rollers (13). Multiple guide rods (4) are fixedly connected inside the frame (1). A slide (5) is slidably connected to the outer circumference of two opposing guide rods (4). A tension roller (9) is rotatably connected inside the slide (5). Tension springs (2) are sleeved on the outer circumference of the multiple guide rods (4), and the two ends of the tension springs (2) are fixed to the slide (5) and the frame (1) respectively. Two clamping frames (6) are provided inside the frame (1). The frame (1) is provided with a mechanism to make the two clamping frames (6) fit together. The drive assembly for moving the two clamping frames (6) has multiple clearance grooves (21) at the bottom to avoid the power roller (13), auxiliary roller (15) and tension roller (9). The top of the two clamping frames (6) is fixedly connected to two springs (20). The top of the two springs (20) is fixedly connected to a U-shaped frame (17). The bottom of the U-shaped frame (17) passes through the clamping frame (6) and is fixedly connected to a semi-arc plate (12) to support the tension roller (9). The top of the frame (1) is fixedly connected to two fixing frames (3). The top of the two fixing frames (3) is provided with a feeding assembly to make the glue fall onto the film. The frame (1) is provided with a scraping assembly to make the glue on the film evenly distributed.

2. The tear-resistant polyethylene film preparation equipment according to claim 1, characterized in that, The feeding assembly includes a glue box (8), which is fixedly connected to the top of two fixed frames (3) and is located directly above the auxiliary roller (15). The bottom of the glue box (8) is provided with multiple second feeding ports (30). A sliding plate (28) is slidably connected inside the glue box (8) below the second feeding ports (30). The upper surface of the sliding plate (28) is provided with multiple first feeding ports (29) that penetrate the sliding plate (28), and the first feeding ports (29) are aligned with the second feeding ports (30). The sliding plate (28) is fixed to the glue box (8) by bolts. A stirring assembly is provided inside the glue box (8) to make the glue flow. A sealing assembly is provided above the clamping frame (6) to block the feeding of the glue box (8).

3. The tear-resistant polyethylene film preparation equipment according to claim 2, characterized in that, The stirring assembly includes a motor, which is fixedly connected to the outer wall of one side of the glue box (8), and one end of the motor output shaft passes through the glue box (8) and is fixedly connected to a stirring frame (31).

4. The tear-resistant polyethylene film preparation equipment according to claim 3, characterized in that, The enclosed assembly includes two fixed plates (18), which are respectively fixedly connected to the top of two clamping frames (6). Each of the two fixed plates (18) has a baffle (22) fixedly connected to its top. The baffle (22) is composed of multiple square plates hinged together. Two support rods (16) are fixedly connected inside the fixed frame (3). The baffle (22) passes around the support rods (16) to guide the baffle (22).

5. The tear-resistant polyethylene film preparation equipment according to claim 4, characterized in that, The leveling assembly includes multiple first connecting seats (27) and multiple second connecting seats (33). The multiple first connecting seats (27) and multiple second connecting seats (33) are arranged alternately. Scrapers (19) are rotatably connected between adjacent first connecting seats (27) and second connecting seats (33) and between the first connecting seat (27) and the clamping frame (6). A fixing rod (32) is fixedly connected between two fixing frames (3), and the fixing rod (32) passes through multiple second connecting seats (33). The two fixing frames (3) are located on opposite sides. Two limiting plates (25) are fixedly connected, and a guide rail (24) is fixedly connected between two adjacent limiting plates (25). A slide rod (26) is slidably connected to the outside of the guide rail (24), and the slide rod (26) passes through the first connecting seat (27). Two guide platforms (14) are fixedly connected inside the frame (1). The two guide platforms (14) are located on both sides of the auxiliary roller (15). Multiple first connecting seats (27) and second connecting seats (33) are located above one of the guide platforms (14) and have a gap between them.

6. The tear-resistant polyethylene film preparation equipment according to claim 5, characterized in that, The drive assembly includes a bidirectional lead screw (11), which is rotatably connected to the inner wall of one side of the frame (1). The bidirectional lead screw (11) passes through two clamping frames (6) and is threadedly connected to the two clamping frames (6). One end of the bidirectional lead screw (11) passes through the frame (1) and is fixedly connected to a knob.

7. The tear-resistant polyethylene film preparation equipment according to claim 6, characterized in that, The top of the plastic box (8) is hinged with a cover plate (7).

8. The tear-resistant polyethylene film preparation equipment according to claim 7, characterized in that, The top of the semi-arc plate (12) is provided with multiple mounting slots, and each of the multiple mounting slots is provided with a ball bearing (23).

9. The method of using the tear-resistant polyethylene film preparation equipment according to claim 8, characterized in that, Includes the following steps: S1: By rotating the double-acting screw (11) with the knob, the double-acting screw (11) will drive the two clamping frames (6) to move in opposite directions through the thread engagement between the two clamping frames (6). The two clamping frames (6) will move on the power roller (13) and the auxiliary roller (15), thereby changing the width of the film placed on the power roller (13) and the auxiliary roller (15). S2: The two clamping frames (6) will move the semi-arc plate (12) through the U-shaped frame (17) to change the width of the tension roller (9) where the film is placed; S3: The film is placed over the power roller (13), below the tension roller (9) and above the auxiliary roller (15). At this time, the clamping frame (6) and the semi-arc plate (12) will block and limit the film, thereby preventing the film from moving. S4: Under the action of film tension, the tension roller (9) will drive the slide (5) to move upward along the guide rod (4). The slide (5) will stretch the tension spring (2), so that the film is in a taut state. The spring (20) in the squeezed state will cause the U-shaped frame (17) to drive the semi-arc plate (12) to move upward, so that the semi-arc plate (12) and the tension roller (9) move synchronously, so that the semi-arc plate (12) keeps the film in a limited position. Thus, the width of the film placed on the power roller (13), auxiliary roller (15) and tension roller (9) can be changed, and adhesive can be applied to films of different widths. S5: During the movement of the clamping frame (6), the fixing plate (18) will be moved, and the fixing plate (18) will move the baffle (22) to block and close the first feeding port (29) located outside the film, so that the first feeding port (29) located outside the film cannot feed material, thus avoiding the waste of glue; S6: During the movement of the clamp frame (6), multiple scrapers (19) will be folded. The scrapers (19) will rotate between the clamp frame (6), the first connecting seat (27) and the second connecting seat (33). During the folding process, the scrapers (19) will cause the first connecting seat (27) to move along the guide rail (24) via the slide rod (26). S7: The first connecting seat (27) will move along the slide bar (26), and the second connecting seat (33) will move along the fixed bar (32), so that the scraper (19) can scrape the glue on the film of different widths.

Images