A film pasting device

Abstract

The utility model relates to the technical field of film pasting equipment, concretely is a kind of film pasting device.The device includes workbench, mounting plate and rodless cylinder;Workbench is screw rod, nut block is equipped on screw rod and is fixed with mounting plate, and the height of mounting plate is adjustable;Mounting plate is connected with reel, reel is equipped with acrylic film roll, and acrylic film is driven and released by servo motor A, pulley and transmission belt;Two first positioning rollers, a second positioning roller, two thinning rollers and a first compression roller are sequentially arranged between mounting plate, second compression roller driven by cylinder A is arranged in front, and inclined cutter is arranged behind second compression roller.Working time, rodless cylinder drives product to move, and acrylic film is cut off after positioning, thinning, grading and pressing, and the degree of automation is high, film pasting is accurate and close, and it is suitable for a variety of height products.

Description

Technical Field

[0001] This utility model relates to the technical field of film application equipment, specifically a film application device. Background Technology

[0002] The film application process is crucial for enhancing the protective performance, aesthetics, and user experience of products. Its core requirements are precise adhesion between the film and the product surface, absence of bubbles and wrinkles, uniform thickness, and smooth cuts, while also meeting the efficiency demands of mass production. However, existing film application equipment and processes still suffer from numerous technical challenges in practical applications, failing to fully meet industry needs. Specific issues include: First, the level of automation is low, relying heavily on manual intervention, resulting in poor production efficiency and quality stability. Currently, most small and medium-sized enterprises still use semi-automated or purely manual film application methods. Manual labor is required to first cut the acrylic film from the roll to the size matching the product, and then manually align the film with the product edges for application. This process can only process 30-50 products per hour, far below the efficiency required for mass production. More importantly, manual operation is susceptible to factors such as hand tremors, visual errors, and fatigue, leading to problems such as film misalignment, air bubbles during application, and wrinkles on the film surface. This results in a high rework rate, increasing labor and material costs and severely impacting product delivery time and quality reputation. Even if some semi-automated equipment can automatically feed the film, manual pushing of the product through the pressing structure or manual control of the cutting timing is still required, resulting in poor operational continuity and making it difficult to form a complete automated production process.

[0003] Secondly, insufficient precision in membrane material transmission and positioning easily leads to issues of misalignment and slackness. Membrane materials (such as acrylic film) are inherently flexible, requiring stable positioning and tensioning structures during transmission to ensure their movement along the preset path. However, existing equipment generally suffers from a lack of positioning nodes. For example, some film-applying equipment guides the membrane material transmission using only a single roller, making it prone to misalignment during movement. This is especially true over long transmission distances, where the misalignment can be extremely high. Consequently, the membrane material may not completely cover the product's application area, or it may extend beyond the designated area, creating extra edges that require subsequent manual trimming, increasing process costs.

[0004] Third, the thickness control of the film material is unstable: Among the existing film application equipment, about 60% of the equipment does not have a dedicated thinning structure and directly uses the original thickness of the film material for application. This cannot adapt to the thickness requirements of different products. If an unsuitable film material is forcibly used, it will lead to problems such as insufficient protective performance of thin film and surface bulging after thick film is applied.

[0005] Fourth, the pressing structure has poor flexibility and low adaptability: different products have different heights and materials, and different height requirements for pressing equipment. However, the pressing structure of existing film-applying equipment generally has a fixed problem and cannot be flexibly adjusted according to the product height. If film needs to be applied to products of different heights, the pressing roller assembly needs to be disassembled and the pads replaced or the bracket adjusted. The operation is cumbersome, and repeated disassembly can easily lead to a decrease in the precision of the components.

[0006] In summary, existing film application equipment has significant shortcomings in terms of automation, positioning accuracy, thickness control, and pressing flexibility. Therefore, developing a film application device with a high degree of automation, precise positioning, good pressing quality, and strong adaptability is key to solving the current technical pain points. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a film-applying device that solves the problems mentioned in the background section.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a film-applying device, comprising a worktable, two mounting plates symmetrically arranged on the upper surface of the worktable, and a rodless cylinder fixed in the middle of the worktable along the front-back direction; characterized in that: two vertical lead screws are symmetrically arranged on the upper surface of the worktable, each lead screw has a U-shaped nut block, and the nut block has a threaded through hole matching the lead screw in the middle; the mounting plates are fixed to the nut blocks on the same side; a roll is rotatably connected to the top of the mounting plates via a connecting plate, and an acrylic film roll is rotatably connected to the roll on the same axis; two first positioning rollers are rotatably connected between the two mounting plates, located below and at the rear of the roll; and a second positioning roller is rotatably connected between the two mounting plates, located below and at the front of the first positioning roller. Two thinning rollers are rotatably connected between the two mounting plates, located below and in front of the second positioning roller; a first pressing roller is rotatably connected between the two mounting plates, located below and in front of the thinning roller; a vertical cylinder A is provided between the two mounting plates via a connecting plate, and the telescopic shaft of the cylinder A is connected to a U-shaped bracket in the left-right direction, with a second pressing roller in the left-right direction rotatably connected to the bottom of the bracket; a cutter inclined downward and forward is provided between the two mounting plates behind the second pressing roller; an acrylic film is pulled out from the film roll, which passes sequentially between the two first positioning rollers, connects to the second positioning roller, passes between the two thinning rollers, and connects below the first pressing roller.

[0009] Preferably, the cutter is slidably connected between two mounting plates via two symmetrical positioning clamps, and two cylinders B, inclined downwards and forwards, are symmetrically arranged at the rear of the cutter, with cylinders B fixed inside the mounting plate.

[0010] Preferably, the mounting plate on the right side is equipped with a servo motor A, whose output shaft passes through the mounting plate and has a pulley fixed coaxially on it.

[0011] Preferably, a pulley is coaxially located on the outer right side of the drum, which is connected to the pulley of the servo motor A via a transmission belt.

[0012] Preferably, one of the pressing rollers is connected to a servo motor B, and the servo motor B is fixed on the mounting plate.

[0013] Preferably, the lower surface of the workbench is provided with a drive shaft in the left-right direction, one end of the drive shaft is fixed with a rotating handle, and the drive shaft is connected to two lead screws respectively through two sets of 90-degree bevel gears.

[0014] Preferably, the lead screw has two symmetrical lead rods connected to the nut block at the front and rear; the cylinder A has two symmetrical lead rods connected to the connecting plate and the bracket of the cylinder A.

[0015] This utility model provides a film application device, which has the following beneficial effects: 1. The device achieves automated acrylic film application, thinning, and product conveying through the coordinated control of servo motors A and B and rodless cylinders. Combined with the pressing and cutting actions driven by cylinders A and B, it forms a complete automated film application process, eliminating the need for manual intervention in key steps. Compared to traditional manual film application, efficiency is improved; simultaneously, automated control avoids errors from manual operation, significantly improving the stability and consistency of product quality and reducing rework costs.

[0016] 2. The device is equipped with two first positioning rollers and one second positioning roller, forming a "dual-node positioning + directional guidance" transmission and positioning system. The first positioning rollers restrict the lateral displacement of the film material through symmetrical clamping, while the second positioning roller guides the acrylic film along a preset path, effectively preventing slack and displacement. Simultaneously, the guide rods on both sides of the lead screw provide stable guidance for the nut block, and the guide rods on both sides of the cylinder provide guidance for the bracket, ensuring that the mounting plate and the second pressing roller move without displacement or tilting. Through the synergistic effect of these multiple structures, the transmission accuracy of the acrylic film and the movement accuracy of the components are significantly improved, meeting the film application requirements of high-precision products.

[0017] 3. The pressing roller is driven by servo motor B. The pressing force can be controlled by adjusting the speed and torque of servo motor B, so as to achieve precise adjustment of acrylic film thickness, adapt to the different requirements of different products for film thickness, and ensure the consistency of film thickness in the same batch. At the same time, the initial pressing of the first pressing roller and the deep pressing of the second pressing roller form a graded pressing structure. The height and pressure of the second pressing roller are adjusted by cylinder A, which effectively avoids air bubbles and wrinkles, ensures tight adhesion between acrylic film and product surface, and improves protective performance and service life.

[0018] 4. The height adjustment mechanism, consisting of a handle, drive shaft, bevel gear set, and lead screw, allows for easy up-and-down movement of the mounting plate, thereby adjusting the overall height of the positioning rollers, pressing rollers, clamping rollers, and cutter. This allows for adaptation to products of different heights within a certain range, without the need to replace equipment or disassemble parts, significantly improving the device's versatility. Simultaneously, the cutter, driven by cylinder B, ensures rapid and precise cutting, with the cutting action precisely matching the product movement rhythm, ensuring continuous production. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 for Figure 2 The right view; Figure 4 for Figure 2 Sectional view of AA; Figure 5 for Figure 4 Enlarged view of section I; In the diagram: 1. Workbench; 101. Lead screw; 102. Nut block; 103. Drive shaft; 104. Rotating handle; 105. Bevel gear set; 106. Lead rod; 2. Mounting plate; 201. Connecting plate; 202. Roller; 203. Cylinder A; 204. Bracket; 205. Servo motor A; 206. Pulley; 207. Transmission belt; 208. Servo motor B; 3. Rodless cylinder; 301. Sliding seat; 4. Film roll; 401. Acrylic film; 5. First positioning roller; 6. Second positioning roller; 7. Thinning roller; 8. First pressing roller; 9. Second pressing roller; 10. Cutter; 1001. Positioning clamp; 1002. Cylinder B; 11. Product. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] In this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0022] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Example 1: Please refer to Figures 1 to 5 A film-applying device includes a worktable (1), two mounting plates (2) symmetrically arranged on the upper surface of the worktable (1), and a rodless cylinder (3) fixed in the middle of the worktable (1) along the front-back direction; characterized in that: two vertical lead screws (101) are symmetrically arranged on the upper surface of the worktable (1), and U-shaped nut blocks (102) are provided on the lead screws (101), and threaded through holes matching the lead screws (101) are provided in the middle of the nut blocks (102); the mounting plates (2) are fixed to the nut blocks (102) on the same side; a roll (202) is rotatably connected to the top of the mounting plates (2) through a connecting plate (201), and an acrylic film roll (4) is rotatably connected to the roll (202) on the coaxial axis; two first positioning rollers (5) are rotatably connected between the two mounting plates (2), and the number of the first positioning rollers (5) is two, located below and behind the roll (202); a second positioning roller (6) is rotatably connected between the two mounting plates (2), located below and behind the first positioning roller (5). Below the positioning roller (5) at the front; two pressing rollers (7) are rotatably connected between the two mounting plates (2), and are located below the front of the second positioning roller (6); a first pressing roller (8) is rotatably connected between the two mounting plates (2), and is located below the front of the pressing roller (7); a vertical cylinder A (203) is provided between the two mounting plates (2) in front of them via a connecting plate (201), and the telescopic shaft of the cylinder A (203) is connected to a U-shaped bracket (204) in the left and right direction, and a second pressing roller (9) in the left and right direction is rotatably connected to the bottom of the bracket (204); a cutter (10) inclined downward and forward is provided between the two mounting plates (2) behind the second pressing roller (9); an acrylic film (401) is pulled out from the film roll (4), which passes between the two first positioning rollers (5), connects to the second positioning roller (6), passes between the two pressing rollers (7), and connects to the bottom of the first pressing roller (8).

[0024] The cutter (10) is slidably connected between two mounting plates (2) by two symmetrical positioning clamps (1001). Two cylinders (1002) are symmetrically arranged at the rear of the cutter (10) and inclined downwards and forwards. The cylinders (1002) are fixed inside the mounting plate (2). The positioning clamps (1001) are U-shaped.

[0025] The workbench (1) provides basic support for the entire device, possessing good load-bearing capacity and stability, ensuring the relative position accuracy of each component. The mounting plate (2) serves as the mounting carrier for components such as the roll (202), rollers, and cutter (10), ensuring the relative position stability of each component. The lead screw (101) and nut block (102) drive the nut block (102) to move up and down through the forward and reverse rotation of the lead screw (101), thereby adjusting the height of the mounting plate (2) to accommodate products (11) of different heights. The rodless cylinder (3) drives the product (11) on its sliding seat (301) to move back and forth, providing stable conveying power for the film application process. The first positioning roller (5) consists of two cylindrical rollers with smooth surfaces, which perform preliminary positioning and tensioning of the acrylic film (401), limiting the lateral displacement of the film material and ensuring that the film material is transmitted along the preset path. The second positioning roller (6) is lower than the first positioning roller (5) and performs secondary positioning on the acrylic film (401) that has passed through the first positioning roller (5), further stabilizing the transmission direction and preventing the acrylic film (401) from loosening. The thinning roller (7) presses the acrylic film (401) to a preset thickness by mutual squeezing, ensuring that the acrylic film (401) has a uniform thickness. The first pressing roller (8) is well attached to the surface of the product (11) and is used to perform preliminary pressing on the thinned acrylic film (401) to initially fix the acrylic film (401) to the surface of the product (11) to be covered. The second pressing roller (9) drives the bracket (204) to move up and down through the telescopic shaft of the cylinder (203), thereby adjusting the height of the second pressing roller (9), controlling its pressing force, and performing deep pressing on the acrylic film (401) that has been preliminarily pressed, improving the adhesion between the acrylic film (401) and the product (11). The cutter (10) is pushed by cylinder B (1002) to move quickly along the positioning clamp (1001) to achieve rapid cutting of the acrylic film (401) that has been pressed.

[0026] The mounting plate (2) on the right side is equipped with a servo motor A (205), whose output shaft passes through the mounting plate (2) and is coaxially fixed with a pulley (206). The roller (202) is coaxially provided with a pulley (206) on the right side, which is connected to the pulley (206) of the servo motor A (205) through a transmission belt (207). The servo motor A (205) drives the roller (202) to rotate through the pulley (206) and the transmission belt (207), controlling the film feeding speed of the acrylic film (401) to match the moving speed of the product (11).

[0027] One of the pressing rollers (7) is connected to a servo motor B (208), which is fixed on the mounting plate (2). The pressing roller (7) is driven to rotate, providing power for pressing the acrylic film (401) and controlling the pressing force and speed.

[0028] The workbench (1) has a left-right drive shaft (103) on its lower surface. One end of the drive shaft (103) is fixed with a rotating handle (104). The drive shaft (103) is connected to two lead screws (101) through two sets of 90-degree bevel gear sets (105). The operator manually rotates the rotating handle (104) in both directions to provide rotational power to the drive shaft (103). The bevel gear sets (105) drive the lead screws (101) to rotate in both directions. The nut block (102) converts the rotational motion of the lead screws (101) into the linear motion of the mounting plates (2) to achieve manual synchronous adjustment of the height of the two mounting plates (2). Generally, the height is fixed after the adjustment is completed.

[0029] The lead screw (101) is symmetrically provided with two guide rods (106) that connect to the nut block (102). The nut block (102) has symmetrical through holes that match the guide rods. The cylinder A (203) is symmetrically provided with two guide rods (106) that connect to the connecting plate (201) and the bracket (204) of the cylinder A (203). The lower end of the guide rod (106) is fixed to the bracket (204), and the upper end is slidably connected to it through two sleeves symmetrically provided on the connecting plate (201). The purpose is to provide guidance for the up-and-down movement of the nut block (102) and the bracket (204), to prevent the parts from shifting or tilting during movement, and to ensure the accuracy of movement.

[0030] The core process of this film application device is "automatic conveying - precise film placement - multi-node positioning - controllable thinning - graded pressing and application - flat cutting". Through the coordinated operation of various structures, it achieves efficient and high-quality film application. First, according to the height of the product (11) to be filmed, the height of the mounting plate (2) is adjusted by rotating the handle (104) so ​​that the first pressing roller (8) is adapted to the surface of the product (11); then the product (11) is fixed on the sliding seat (301) of the rodless cylinder (3). After the device is started, the rodless cylinder (3) drives the product (11) to move from back to front. At the same time, the servo motor A (205) drives the roll (202) to rotate and release the acrylic film (401); the acrylic film (401) passes through the initial positioning and tension of the two first positioning rollers (5) and the secondary positioning and tension of the second positioning roller (6) in sequence, and enters between the two pressing rollers (7). The pressing rollers (7) are driven by the servo motor B (208) to press the acrylic film (401) to a preset thickness; after pressing... The acrylic film (401) extends below the first pressing roller (8). When the front of the product (11) reaches below the first pressing roller (8), the first pressing roller (8) initially presses the acrylic film (401) onto the surface of the product (11) to be covered. The product (11) continues to move forward to below the second pressing roller (9), and cylinder A (203) drives the second pressing roller (9) to move down to deeply press the acrylic film (401). When the rear of the product (11) moves to the cutter (10), cylinder B (1002) drives the cutter (10) to quickly cut the acrylic film (401). Finally, the product (11) moves forward to the designated position in front of the rodless cylinder (3), and the product (11) is removed. The rodless cylinder (3) drives the sliding seat (301) to reset and enter the next film covering cycle.

[0031] Working process: Place the product (11) to be coated on the sliding seat (301) of the rodless cylinder (3) and fix the product (11) firmly by magnetic attraction to prevent it from shifting during movement; rotate the handle (104) on the lower surface of the worktable (1) according to the height of the product (11), and rotate the handle (104) in both directions. The rotating handle (104) drives the drive shaft (103) to rotate. The drive shaft (103) drives the two lead screws (101) to rotate in both directions through two sets of 90-degree bevel gear sets (105); the nut block (102) on the lead screw (101) drives the mounting plate (2) on the same side to move up and down synchronously. At the same time, the guide rods (106) symmetrically arranged in front and behind the lead screw (101) provide guidance for the nut block (102) to prevent the nut block (102) from shifting or tilting when moving, until the distance between the lower surface of the first pressing roller (8) between the mounting plates (2) and the upper surface of the product (11) is matched, and stop rotating the handle (104).

[0032] The rodless cylinder (3) is started, and its sliding seat (301) drives the product (11) to move from the back of the worktable (1) to the front at a preset speed. At the same time, the servo motor A (205) is started. The output shaft of the servo motor A (205) drives the pulley (206) fixed on the same axis to rotate. The pulley (206) drives the pulley (206) of the drum (202) to rotate through the transmission belt (207), thereby driving the drum (202) to rotate around its own axis. The acrylic film roll (4) mounted on the drum (202) rotates accordingly, pulling out the acrylic film (401). The rotation speed of the servo motor A (205) is adjusted according to the moving speed of the rodless cylinder (3) to ensure that the release speed of the acrylic film (401) is consistent with the moving speed of the product (11).

[0033] After the acrylic film (401) is pulled out, it first passes between two first positioning rollers (5). The two first positioning rollers (5) clamp the acrylic film (401), achieving initial positioning and tension, and limiting the lateral displacement of the acrylic film (401). Then, the acrylic film (401) passes around the second positioning roller (6) located below and in front of the first positioning rollers (5). The second positioning roller (6) changes the transmission direction of the acrylic film (401) and further positions and tensions the acrylic film (401). To prevent the acrylic film (401) from loosening; then the acrylic film (401) passes between the two thinning rollers (7) located in front of the second positioning roller (6). At this time, the servo motor B (208) connected to one of the thinning rollers (7) starts. The servo motor B (208) drives the thinning roller (7) to rotate. The two thinning rollers (7) squeeze each other and press the acrylic film (401) to a preset thickness. The torque of the servo motor B (208) is adjusted according to the film thickness requirements to ensure stable pressing force.

[0034] The thinned acrylic film (401) continues to be conveyed forward, extending to the first pressing roller (8) located below the thinning roller (7); when the front of the product (11) moves directly below the first pressing roller (8), the first pressing roller (8), under its own weight and the tension of the acrylic film (401), initially presses the acrylic film (401) onto the surface of the product (11) to be adhered. As the product (11) continues to move forward, the first pressing roller (8) continues to initially press the acrylic film (401), gradually eliminating most of the air between the film and the product (11), so that the film is initially fixed to the surface of the product (11); when the front of the product (11) moves to the surface of the first pressing roller (8)... When the second pressing roller (9) is directly below the front, cylinder A (203) is activated, and its telescopic shaft extends downward to drive the connected bracket (204) to move downward. The second pressing roller (9) connected to the bottom of the bracket (204) moves downward accordingly. At the same time, the guide rods (106) symmetrically arranged on the left and right sides of cylinder A (203) provide guidance for the bracket (204) to prevent the bracket (204) from deviating until the second pressing roller (9) contacts the surface of the acrylic film (401) and reaches the preset distance. As the product (11) continues to move forward, the second pressing roller (9) deeply presses the acrylic film (401) to ensure that the acrylic film (401) is tightly attached to the surface of the product (11) without bubbles or wrinkles.

[0035] When the rear of the product (11) moves to the cutter (10) behind the second pressing roller (9), cylinder B (1002) is activated, its telescopic shaft extends, and pushes the cutter (10) to move quickly downward and forward along the positioning clamp (1001). The positioning clamp (1001) provides guidance for the cutter (10) to ensure that the cutter (10) moves along the preset path. The blade of the cutter (10) cuts the acrylic film (401). The product (11) continues to move forward. After being pressed again by the second pressing roller (9), it moves to the designated position in front of the rodless cylinder (3). The operator removes the film-coated product (11) from the sliding seat (301). Then the rodless cylinder (3) rotates in the opposite direction, driving the sliding seat (301) to move from the front back to the initial position in the rear, ready for the next film-coating cycle.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A film-applying device, comprising a worktable (1), two mounting plates (2) symmetrically arranged on the upper surface of the worktable (1), and a rodless cylinder (3) fixed in the middle of the worktable (1) along the front-back direction; characterized in that: The workbench (1) has two vertical lead screws (101) symmetrically arranged on the upper surface. Each lead screw (101) has a U-shaped nut block (102) with a threaded through hole in the middle that matches the lead screw (101). The mounting plate (2) is fixed to the nut block (102) on the same side. A roller (202) is rotatably connected to the top of the mounting plate (2) via a connecting plate (201). An acrylic film roll (4) is rotatably connected to the roller (202) on the same axis. Two first positioning rollers (5) are rotatably connected between the two mounting plates (2), located below and behind the roller (202). A second positioning roller (6) is rotatably connected between the two mounting plates (2), located below and in front of the first positioning roller (5). A pressing roller (7) is rotatably connected between the two mounting plates (2). There are two, located below the front of the second positioning roller (6); a first pressing roller (8) is rotatably connected between the two mounting plates (2), located below the front of the thinning roller (7); a vertical cylinder A (203) is provided between the two mounting plates (2) in front of them through a connecting plate (201), and the telescopic shaft of the cylinder A (203) is connected to a U-shaped bracket (204) in the left and right direction, and a second pressing roller (9) in the left and right direction is rotatably connected to the bottom of the bracket (204); a cutter (10) inclined downward and forward is provided between the two mounting plates (2) behind the second pressing roller (9); an acrylic film (401) is pulled out from the film roll (4), which passes between the two first positioning rollers (5), connects to the second positioning roller (6), passes between the two thinning rollers (7) and connects below the first pressing roller (8).

2. The film-applying device according to claim 1, characterized in that: The cutter (10) is slidably connected between two mounting plates (2) by two symmetrical positioning clamps (1001). Two cylinders (1002) are symmetrically arranged at the rear of the cutter (10) and inclined downwards and forwards. The cylinders (1002) are fixed inside the mounting plate (2).

3. The film-applying device according to claim 1, characterized in that: The mounting plate (2) on the right side is equipped with a servo motor A (205), whose output shaft passes through the mounting plate (2) and a pulley (206) is fixed on it coaxially.

4. The film-applying device according to claim 3, characterized in that: The drum (202) is provided with a pulley (206) on the outer right side coaxially, which is connected to the pulley (206) of the servo motor A (205) via a transmission belt (207).

5. The film-applying device according to claim 1, characterized in that: One of the pressing rollers (7) is connected to a servo motor B (208), which is fixed on the mounting plate (2).

6. The film-applying device according to claim 1, characterized in that: The workbench (1) has a drive shaft (103) on its lower surface in the left-right direction. One end of the drive shaft (103) is fixed with a rotating handle (104). The drive shaft (103) is connected to two lead screws (101) through two sets of 90-degree bevel gear sets (105).

7. The film-applying device according to claim 1, characterized in that: The lead screw (101) is symmetrically provided with two lead rods (106) connected to the nut block (102); the cylinder A (203) is symmetrically provided with two lead rods (106) connected to the connecting plate (201) and the bracket (204) of the cylinder A (203).

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