Film covering jig

Abstract

The utility model relates to the technical field of film coating jigs, and discloses a film coating jig which comprises a bottom shell, an air outlet is formed in the bottom shell in a penetrating mode, an air inlet is formed in the bottom shell close to the air outlet, a top shell is fixedly connected to the upper surface of the bottom shell, and a plurality of through holes are formed in the top shell in a penetrating mode. A positioning groove is formed in the side, close to the through hole, in the top shell, and a positioning assembly is installed on the upper surface of the top shell. The positioning assembly comprises a plurality of sliding rails, the lower surfaces of the sliding rails are fixedly connected to the upper surface of the top shell, and the outer walls of the sliding rails are slidably connected with L-shaped clamping blocks which are in bilateral symmetry. According to the utility model, the metal film material is firmly adsorbed in the positioning groove through vacuum negative pressure, so that the problem that the film material is adhered during film pasting is effectively solved. And meanwhile, the L-shaped clamping blocks are driven by the sliding connecting shell, the jig can quickly adapt to the membrane materials of different sizes for positioning, operation is convenient and fast, and the universality and practicability of the jig are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of coating fixture technology, and in particular to coating fixtures. Background Technology

[0002] Lamination is a crucial step in modern industrial manufacturing, widely used in electronic products (such as mobile phone screens and tablet computer back panels), precision instruments, automotive interior and exterior parts, and decorative panels. Its purpose is to apply one or more layers of films with specific functions, such as protective films, optical films, decorative films, or conductive films, to the surface of a product's substrate. Lamination fixtures, as core auxiliary equipment in this process, primarily function to precisely position and reliably fix the substrate during lamination, ensuring the accuracy, stability, and consistency of the lamination process. A well-designed fixture is fundamental to guaranteeing the final product's lamination quality (such as bonding accuracy, no bubbles, and no wrinkles) and improving production efficiency. Therefore, developing a highly efficient and versatile lamination fixture is of significant practical importance.

[0003] In existing technologies, a common fixture for coating magnetically conductive metal films uses electromagnetic adsorption for fixation. These fixtures typically include a flat worktable with multiple electromagnet coils arranged in an array beneath it. In practice, the worker first manually places the metal film on the worktable and aligns its edges using pre-set lines, grooves, or fixed positioning pins. Once aligned, the power is switched on to activate the electromagnets, which use the generated magnetic field to attract and hold the metal film on the worktable, providing a relatively stable reference for subsequent processes of applying other films to its surface.

[0004] However, the existing technology using the electromagnetic adsorption principle has serious design flaws in practical applications. The core problem lies in the uneven distribution of the adsorption force generated by the electromagnet. The adsorption force is typically strong near the center of the electromagnet coil, while it weakens significantly between two coils or at the edges of the metal film. When the metal film is thin or has slight natural warping, this uneven adsorption force cannot guarantee that every part of the film will be completely flat and tightly adhered to the fixture surface. When applying the upper film (such as a protective film), due to the adhesive nature of the film, the peeling force generated during the tearing and application process can easily exceed the weak magnetic attraction in localized areas. This causes the edges or corners of the metal film to be picked up by the upper film and shift. This not only severely affects the final film alignment accuracy but also easily generates air bubbles and wrinkles between the films, directly leading to product scrap, increasing production costs, and affecting overall processing efficiency. Therefore, a film-coating fixture is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a coating fixture, which aims to improve the problem in the prior art where the attraction force generated by the electromagnet is unevenly distributed. Typically, the attraction force is stronger in the area near the center of the electromagnet coil, while the attraction force is significantly weakened between the two coils or at the edge of the metal film.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a film-coating fixture, comprising a bottom shell, an air outlet through which an air inlet is formed inside the bottom shell near the air outlet, a top shell fixedly connected to the upper surface of the bottom shell, a plurality of through holes through which a positioning groove is formed inside the top shell near the through holes, and a positioning component installed on the upper surface of the top shell.

[0007] The positioning component includes multiple slide rails, the lower surfaces of which are fixedly connected to the upper surface of the top shell. The outer walls of the multiple slide rails are slidably connected to symmetrical L-shaped clamping blocks. A connecting frame is fixedly connected to one side of each L-shaped clamping block. A rotating roller is rotatably connected inside the connecting frame. Sliding blocks are fixedly connected to opposite sides of each of the two L-shaped clamping blocks. The outer walls of the two sliding blocks are connected through a connecting shell. A wedge is fixedly connected to one side of the outer wall of each sliding block.

[0008] As a further description of the above technical solution:

[0009] The inner wall of the connecting shell is fixedly connected with symmetrical left and right limiting strips, and the outer wall of the limiting strips is slidably connected with trapezoidal blocks.

[0010] As a further description of the above technical solution:

[0011] The connecting shell is rotatably connected to a bolt, and the outer wall of the bolt is threaded into the inside of the trapezoidal block.

[0012] As a further description of the above technical solution:

[0013] A limiting groove is provided inside the wedge block near the trapezoidal block, and a slider is fixedly connected to one side of the outer wall of the trapezoidal block.

[0014] As a further description of the above technical solution:

[0015] A knob is fixedly connected to the upper end of the bolt, and the outer wall of the slider is slidably connected to the inner wall of the limiting groove.

[0016] As a further description of the above technical solution:

[0017] A fixing block is fixedly connected to the lower end of the bolt, and the fixing block has anti-slip texture inside.

[0018] As a further description of the above technical solution:

[0019] The lower surface of the fixed block abuts against the upper surface of the slide rail, and the outer wall of the trapezoidal block is slidably connected to the outer wall of the wedge block.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the sliding block is slidably connected to the inner wall of the connecting shell, and the outer wall of the wedge block is slidably connected to the inner wall of the connecting shell.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by merging the bottom shell and the top shell into one piece, and by connecting the negative pressure pipe to the air inlet, and then connecting the air inlet to the through hole, the metal film inside the positioning groove is fixed to the inner wall of the positioning groove. The metal film is firmly fixed by vacuum adsorption, thus achieving the effect of not sticking the metal film when applying it. At the same time, the sliding connecting shell can drive the L-shaped clamp to slide on the outer wall of the slide rail, thereby achieving the effect of quick positioning according to the size of the metal film, thus improving the practicality of the fixture.

[0024] 2. In this utility model, by rotating the knob, the bolt causes the anti-slip texture on the lower side of the fixing block to abut against the upper surface of the slide rail. At the same time, by moving the bolt, the trapezoidal block is able to slide along the outer wall of the limiting strip. Then, the trapezoidal block drives the slider to slide on the inner wall of the limiting groove. By moving the slider, the sliding block on one side of the wedge block is able to slide on the inner wall of the connecting shell. The L-shaped clamping block clamps and fixes the fixture to the outer wall of the connecting shell for quick fixation and limiting, thereby improving the practicality of the fixture. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the coating fixture proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the bottom shell structure of the coating fixture proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the connecting frame portion of the coating fixture proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the fixing block portion of the coating fixture proposed in this utility model;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the image.

[0030] Legend:

[0031] 1. Bottom shell; 2. Air outlet; 3. Air inlet; 4. Top shell; 5. Through hole; 6. Positioning groove; 7. Slide rail; 8. L-shaped clamp; 9. Sliding block; 10. Connecting shell; 11. Wedge block; 12. Limiting strip; 13. Bolt; 14. Trapezoidal block; 15. Sliding block; 16. Limiting groove; 17. Fixing block; 18. Anti-slip texture; 19. Knob; 20. Connecting frame; 21. Rotating roller. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-5This utility model provides an embodiment of a coating fixture, including a bottom shell 1, which serves as the supporting foundation for the entire fixture. An air outlet 2 is provided through the interior of the bottom shell 1, connecting the internal air passage of the fixture to the outside. An air inlet 3 is provided inside the bottom shell 1 near the air outlet 2, connecting to an external negative pressure source and serving as the gas inlet for vacuum adsorption. A top shell 4 is fixedly connected to the upper surface of the bottom shell 1, forming a sealed cavity with the bottom shell 1, providing a working platform for placing the membrane material. The top shell 4 has a through-hole... Multiple through holes 5 are provided, connecting the positioning groove 6 on the upper surface of the top shell 4 to the internal negative pressure cavity, allowing negative pressure to be applied to the membrane material. A positioning groove 6 is provided inside the top shell 4 near the through holes 5, providing a precise placement area for the metal membrane material to be coated. A positioning assembly is installed on the upper surface of the top shell 4; the positioning assembly is used to clamp and position metal membrane materials of different sizes from the side; the positioning assembly includes multiple slide rails 7, which provide a reference and guide for the movement of the positioning assembly, and the lower surfaces of the slide rails 7 are fixed. Connected to the upper surface of the top shell 4, multiple slide rails 7 are slidably connected to symmetrical L-shaped clamping blocks 8 on their outer walls. The L-shaped clamping blocks 8 are clamping components that directly contact the edge of the metal film material. They can slide on the slide rails 7 to accommodate different widths. A connecting frame 20 is fixedly connected to one side of each L-shaped clamping block 8. A rotating roller 21 is rotatably connected inside the connecting frame 20. The rotating roller 21 can assist in pressing or guiding the film during lamination, reducing friction and making the lamination process smoother. Sliding blocks 9 are fixedly connected to opposite sides of each of the two L-shaped clamping blocks 8. The sliding block 9 serves as a connector between the L-shaped clamping block 8 and the linkage mechanism. The outer walls of the two sliding blocks 9 are connected by a connecting shell 10, which integrates the symmetrical sliding blocks 9 into a single unit, allowing the L-shaped clamping blocks 8 on both sides to move synchronously. A wedge 11 is fixedly connected to one side of the outer wall of the sliding block 9. The wedge 11 is part of the subsequent fine-tuning and locking mechanism; its wedge-shaped structure converts linear motion into locking force. The outer wall of the sliding block 9 is slidably connected to the inner wall of the connecting shell 10, and the outer wall of the wedge 11 is slidably connected to the inner wall of the connecting shell 10. These two sliding connections ensure that the L-shaped clamping block 8 assembly can be adjusted under the constraint of the connecting shell 10.

[0034] Specifically, the bottom shell 1 and the top shell 4 form a vacuum cavity, creating negative pressure within the positioning groove 6 through the air inlet 3 and through-hole 5, thereby firmly and evenly adsorbing the metal film onto the working surface. Simultaneously, the upper positioning assembly, via the slide rail 7 and the symmetrical L-shaped clamps 8 linked to the connecting shell 10, enables rapid and synchronous adjustment of film materials of different sizes. The rotating roller 21 facilitates the actual coating operation, while the wedge block 11 lays the foundation for the subsequent locking mechanism.

[0035] Reference Figures 1-5The inner wall of the connecting shell 10 is fixedly connected with symmetrical left and right limiting strips 12, which provide linear guides for the movement of the trapezoidal block 14. The outer wall of the limiting strips 12 is slidably connected to the trapezoidal block 14. The trapezoidal block 14 acts as a transmission component and moves along the limiting strips 12 under the action of the bolt 13. The bolt 13 is rotatably connected inside the connecting shell 10. The bolt 13 is the driving component of the entire locking mechanism and drives the movement of other components through rotation. The outer wall of the bolt 13 is threaded into the inside of the trapezoidal block 14. This threaded connection converts the rotational motion of the bolt 13 into the linear motion of the trapezoidal block 14. A limiting groove 16 is opened inside the wedge block 11 near the trapezoidal block 14. The limiting groove 16 cooperates with the slider 15 to transmit the movement of the trapezoidal block 14 to the wedge block 11. A slider 15 is fixedly connected to one side of the outer wall of the trapezoidal block 14; the slider 15 is a protruding structure that realizes motion transmission. A knob 19 is fixedly connected to the upper end of the bolt 13. The knob 19 provides the operator with a gripping part for manually rotating the bolt 13. The outer wall of the slider 15 is slidably connected to the inner wall of the limiting groove 16. This sliding fit is the key transmission link for realizing wedge locking. A fixing block 17 is fixedly connected to the lower end of the bolt 13. The fixing block 17 is a brake block used to lock the entire positioning assembly on the slide rail 7. The fixing block 17 has anti-slip texture 18 inside. The anti-slip texture 18 increases the friction to ensure that the fixing block 17 can be firmly locked on the slide rail 7. The lower surface of the fixing block 17 abuts against the upper surface of the slide rail 7. The outer wall of the trapezoidal block 14 is slidably connected to the outer wall of the wedge block 11.

[0036] Specifically, when the operator rotates knob 19, bolt 13 simultaneously performs two locking actions: First, bolt 13 drives the lower fixing block 17 to press against slide rail 7, fixing the entire connecting shell 10 in position on slide rail 7; second, the rotation of bolt 13 drives trapezoidal block 14 to move along limit strip 12, and trapezoidal block 14, through the cooperation of slider 15 and limit groove 16, pushes wedge block 11 outward. This wedge-tightening action causes sliding block 9 to be tightly pressed against the inner wall of connecting shell 10, thereby firmly locking the distance between the two L-shaped clamping blocks 8.

[0037] Working principle: When this fixture is needed, first, the metal film is placed in the positioning groove 6 of the top shell 4. The external negative pressure pipe is connected to the air inlet 3 of the bottom shell 1 of the fixture. Air is drawn out through multiple through holes 5 in the top shell 4, thereby creating negative pressure in the positioning groove 6. The metal film is firmly and evenly adsorbed onto the surface of the fixture using the principle of vacuum adsorption, effectively avoiding the problem of the film being stuck up and shifted during the subsequent film application process.

[0038] Following positioning, the operator can manually slide the connecting shell 10, causing the symmetrical L-shaped clamps 8 on both sides to be quickly and coarsely adjusted along the slide rail 7 to accommodate different sizes of film materials. Once the position is roughly determined, the knob 19 on the positioning assembly is rotated. The knob 19 rotates the bolt 13, creating a double locking effect: on the one hand, the bottom fixing block 17 uses its anti-slip texture 18 to press down and lock onto the slide rail 7, fixing the longitudinal position of the entire positioning assembly; on the other hand, the rotation of the bolt 13 drives the trapezoidal block 14 to move, and through the cooperation of the slider 15 and the limiting groove 16, pushes the wedge block 11 outward, thereby pressing the sliding block 9 tightly against the inner wall of the connecting shell 10, achieving precise locking of the distance between the two L-shaped clamps 8. Through this series of coordinated operations, this fixture achieves stable adsorption of metal film materials and rapid, lockable, and precise positioning, while the rotating roller 21 on the L-shaped clamps 8 provides assistance for the coating operation, demonstrating strong versatility and practicality.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A film-coated fixture, comprising a base shell (1), characterized in that: An air outlet (2) is provided through the inside of the bottom shell (1), and an air inlet (3) is provided inside the bottom shell (1) near the air outlet (2). A top shell (4) is fixedly connected to the upper surface of the bottom shell (1). Multiple through holes (5) are provided through the inside of the top shell (4). A positioning groove (6) is provided inside the top shell (4) near the through holes (5). A positioning component is installed on the upper surface of the top shell (4). The positioning assembly includes multiple slide rails (7), the lower surfaces of the multiple slide rails (7) are fixedly connected to the upper surface of the top shell (4), the outer walls of the multiple slide rails (7) are slidably connected to left and right symmetrical L-shaped clamping blocks (8), one side of one L-shaped clamping block (8) is fixedly connected to a connecting frame (20), the connecting frame (20) is rotatably connected to a rotating roller (21), the opposite sides of the two L-shaped clamping blocks (8) are fixedly connected to sliding blocks (9), the outer walls of the two sliding blocks (9) are connected through a connecting shell (10), and one side of the outer wall of the sliding block (9) is fixedly connected to a wedge (11).

2. The coating fixture according to claim 1, characterized in that: The inner wall of the connecting shell (10) is fixedly connected with left and right symmetrical limiting strips (12), and the outer wall of the limiting strips (12) is slidably connected with trapezoidal blocks (14).

3. The coating fixture according to claim 2, characterized in that: The connecting shell (10) is rotatably connected to a bolt (13), and the outer wall of the bolt (13) is threadedly connected to the inside of the trapezoidal block (14).

4. The coating fixture according to claim 3, characterized in that: A limiting groove (16) is provided inside the wedge (11) near the trapezoidal block (14), and a slider (15) is fixedly connected to one side of the outer wall of the trapezoidal block (14).

5. The coating fixture according to claim 4, characterized in that: A knob (19) is fixedly connected to the upper end of the bolt (13), and the outer wall of the slider (15) is slidably connected to the inner wall of the limiting groove (16).

6. The coating fixture according to claim 5, characterized in that: The lower end of the bolt (13) is fixedly connected to a fixing block (17), and the fixing block (17) has anti-slip texture (18) inside.

7. The coating fixture according to claim 6, characterized in that: The lower surface of the fixed block (17) abuts against the upper surface of the slide rail (7), and the outer wall of the trapezoidal block (14) is slidably connected to the outer wall of the wedge block (11).

8. The coating fixture according to claim 1, characterized in that: The outer wall of the sliding block (9) is slidably connected to the inner wall of the connecting shell (10), and the outer wall of the wedge block (11) is slidably connected to the inner wall of the connecting shell (10).

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