A laser cutting film positioning device for protective film

Abstract

The utility model discloses a kind of protective film laser cutting film positioning devices, it is related to film material cutting technical field, including film cutting machine main body, cutting assembly, first film pressing assembly, second film pressing assembly, film cutting machine main body is equipped with film cutting chamber, the bottom plate of film cutting chamber is used to support film material;Cutting assembly is set to film cutting chamber, for cutting film material;Before cutting film material, the two side edges of film material are pressed on the bottom plate by first film pressing assembly, and the integrity of film material is positioned;Second film pressing assembly presses the cutting area of film material on the bottom plate, and the cutting area is locally pressed, the distance of cutting assembly from second film pressing assembly is closer, reduce the displacement of cutting area of film material when cutting, to ensure the accuracy of film cutting.

Description

Technical Field

[0001] This utility model relates to the field of film cutting technology, and more specifically, to a protective film laser cutting positioning device. Background Technology

[0002] During the manufacturing process of electronic device components (such as mobile phone casings), a protective film needs to be applied to the surface of the components. Taking mobile phone casings as an example, the main reasons for applying a protective film are as follows:

[0003] 1. Prevent scratches and wear: During processing, the outer casing may come into contact with and rub against equipment, tools or other parts. The protective film can isolate the outer casing from direct contact and prevent scratches, abrasions or other damage to the surface of the outer casing during processing.

[0004] 2. Resisting stains and contamination: The processing environment may contain dust, oil, fingerprints, etc. The protective film can prevent these stains from adhering to the surface of the shell, reduce the cleaning difficulty of subsequent processes, and prevent stains from affecting the effect of subsequent processing (such as painting, coating, etc.).

[0005] 3. Avoid chemical corrosion: Some processing steps may use chemicals such as cleaning agents and coolants. The protective film can act as a barrier to prevent the outer shell material from being corroded.

[0006] Each component has a different shape, so before applying the film, a specific shape needs to be cut from the whole film material to match the shape of the corresponding component.

[0007] The protective film itself is a flexible material. Multiple external forces combine to cause the protective film to shift during the cutting process, resulting in inaccurate cutting dimensions.

[0008] For those skilled in the art, how to avoid dimensional inaccuracies caused by displacement during membrane cutting is a technical problem that needs to be solved. Utility Model Content

[0009] The core of this utility model is to provide a protective film laser cutting and positioning device, which includes a first pressing component and a second pressing component. The first pressing component squeezes the two sides of the film material, while the second pressing component locally squeezes the area of ​​the film material to be cut to prevent the film material from lifting due to excessive distance between the area to be cut and the first pressing component. This improves the accuracy of film cutting. The specific solution is as follows:

[0010] A protective film laser cutting and positioning device, comprising:

[0011] The main body of the film cutting machine is equipped with a film cutting chamber, and the bottom plate of the film cutting chamber is used to support the film material;

[0012] A cutting assembly, disposed in the film cutting chamber, is used to cut the film material;

[0013] The first pressing assembly is installed in the cutting chamber and is used to press the two sides of the film material onto the base plate;

[0014] The second pressing assembly is installed on the cutting assembly and is used to press the area of ​​the film to be cut onto the base plate.

[0015] In some embodiments, the cutting assembly includes a driving part and a cutting part, and the second pressing assembly is mounted on the cutting part; the driving part is used to drive the cutting part and the second pressing assembly to move.

[0016] In some embodiments, the second pressing assembly includes a pressing connector, a pressing rod, and a pressing plate, wherein the pressing connector is fixed to the cutting part and the pressing connector is provided with a guide groove;

[0017] The lower pressure plate is fixed to one end of the lower pressure rod, and the other end of the lower pressure rod is slidably assembled into the guide groove; the lower pressure plate is used to apply pressure to the membrane material.

[0018] In some embodiments, an elastic element is provided between the pressure rod and the pressure connector, the elastic element applying an outwardly extending elastic force to the pressure rod.

[0019] In some embodiments, the lower pressure plate is rotatably mounted with ball bearings, a portion of which is exposed above the lower pressure plate, and the ball bearings are used to contact the membrane material.

[0020] In some embodiments, two second pressure film assemblies are mounted on the cutting section.

[0021] In some embodiments, the driving unit includes a longitudinal driving component and a transverse driving component, which cooperate to drive the cutting unit to move in a two-dimensional plane.

[0022] In some embodiments, the first film pressing assembly includes a connecting seat, a film pressing plate, and a connecting shaft. The connecting seat is fixed to the film cutting chamber, the connecting shaft is fixed to the film pressing plate, and the film pressing plate is hinged to the connecting seat via the connecting shaft. Torque is applied to the connecting shaft via a torsion spring.

[0023] In some embodiments, the cutting portion is a laser cutting assembly;

[0024] The base plate is provided with mesh holes, which are used to avoid the cutting part;

[0025] A waste collection drawer is installed below the base plate.

[0026] In some embodiments, the film cutting chamber is provided with an unwinding mechanism and a winding mechanism, the unwinding mechanism being used to release the film material to the base plate, and the winding mechanism being used to recover the remaining film material after cutting.

[0027] This utility model provides a protective film laser cutting and positioning device. The main body of the film cutting machine is provided with a cutting chamber, and the bottom plate of the cutting chamber is used to support the film material. The cutting component is set in the cutting chamber for cutting the film material. Before cutting the film material, the two sides of the film material are pressed onto the bottom plate by the first pressing component to form an integral positioning of the film material. The second pressing component presses the area of ​​the film material to be cut onto the bottom plate, forming a local pressing on the area to be cut. The distance between the cutting component and the second pressing component is closer, reducing the displacement of the area of ​​the film material to be cut during cutting, thereby ensuring the accuracy of the film material cutting. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is an isometric schematic diagram of a specific embodiment of the protective film laser cutting and positioning device of this utility model;

[0030] Figure 2A This is an isometric view of the protective film laser cutting and positioning device of this utility model, showing the placement of the film material.

[0031] Figure 2B for Figure 2A Axonometric schematic diagram;

[0032] Figure 3 This is an isometric schematic diagram showing the interaction between the base plate, the cutting assembly, the first pressing assembly, and the second pressing assembly;

[0033] Figure 4A This is an isometric schematic diagram of the first pressure film assembly;

[0034] Figure 4B This is a schematic diagram of the explosion of the first pressure film assembly;

[0035] Figure 5A This is an isometric schematic diagram of the second pressure film assembly;

[0036] Figure 5B This is an isometric cross-sectional view of the second pressure film assembly.

[0037] The image includes:

[0038] Film cutting machine body 10; base plate 110; mesh holes 111; waste collection drawer 120;

[0039] Cutting assembly 20; driving unit 210; longitudinal driving assembly 211; transverse driving assembly 212; cutting unit 220;

[0040] First pressure film assembly 30; connecting seat 310; pressure film plate 320; connecting shaft 330; torsion spring 340;

[0041] Second pressure film assembly 40; lower pressure connector 410; guide groove 411; lower pressure rod 420; lower pressure plate 430; elastic element 440; ball bearing 450;

[0042] Membrane material A. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this utility model, the protective film laser cutting and positioning device of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Combination Figure 1 As shown, this utility model provides a protective film laser cutting and positioning device, including a film cutting machine body 10, a cutting component 20, a first pressing component 30, a second pressing component 40, and other components.

[0045] The main body 10 of the film cutting machine serves as the outer shell structure of the entire protective film laser cutting and positioning device, and other structures are installed on the main body 10. The main body 10 of the film cutting machine has a cutting chamber inside, and the bottom plate 110 of the cutting chamber is used to support the film material A. The film material A is placed on the upper surface of the bottom plate 110, and the upper surface of the bottom plate 110 supports the film material A, so that the film material A is attached to the bottom plate 110.

[0046] It should be noted that the upper surface of the base plate 110 can be a flat surface or a curved surface. The base plate 110 is used to provide a surface for the membrane material A to be attached, so that the lower surface of the membrane material A is supported, while the upper surface of the membrane material A is exposed in the cutting chamber.

[0047] The cutting assembly 20 is disposed in the film cutting chamber and is used to cut the film material A. Before being cut, the film material A is a complete thin film structure, such as a rectangle. The area of ​​the film material A is larger than the area to be cut. The cutting assembly 20 cuts a portion of the whole film material A to form the required shape.

[0048] The cutting assembly 20 cuts out a specific shape by a cutting blade that directly contacts the membrane material A, or it can use a non-contact cutting method, such as laser cutting.

[0049] The first pressing assembly 30 is installed in the film cutting chamber and is used to press the two side edges of the film material A onto the base plate 110, combined with Figure 2A , Figure 2B , Figure 3 As shown, there are two first pressing film assemblies 30. One first pressing film assembly 30 is set on each of the two sides of the membrane material A. The two first pressing film assemblies 30 are located on both sides of the membrane material A in the X-axis direction. The two edges of the membrane material A on both sides of the X-axis are squeezed by one first pressing film assembly 30. The first pressing film assembly 30 presses on the upper surface of the membrane material A, while the base plate 110 supports the lower surface of the membrane material A. The first pressing film assembly 30 and the base plate 110 work together to clamp and fix the membrane material A.

[0050] In addition, two or more first pressing assemblies 30 may be provided on each side of the membrane material A. These specific embodiments should all be included within the protection scope of this utility model.

[0051] Before being cut, membrane material A is moved to the corresponding position on the upper surface of the base plate 110. After positioning, the area of ​​membrane material A to be cut is placed within the cutting range of the cutting component 20. After membrane material A is in place, the two side edges of membrane material A are first squeezed by the first pressing component 30.

[0052] Although the two edges of membrane material A are squeezed at this time, the area to be cut in the center of membrane material A is not squeezed. Since membrane material A itself has a certain degree of elasticity, the area to be cut in membrane material A may shift in position during cutting, resulting in inaccurate dimensions of the finished product after cutting.

[0053] This utility model is provided with a second pressing assembly 40, which is installed on the cutting assembly 20. The second pressing assembly 40 is used to press the area to be cut of the film material A onto the base plate 110. The second pressing assembly 40 also presses on the upper surface of the film material A. Unlike the first pressing assembly 30, the second pressing assembly 40 only presses a local area of ​​the area to be cut. The second pressing assembly 40 is closer to the slit of the cutting assembly 20, so it can reduce the positional displacement of the film material A during the cutting process and help improve the cutting accuracy of the film material A.

[0054] It should be noted that in the embodiments shown in the accompanying drawings of this utility model, the Z-axis represents the vertical direction and the X-axis and Y-axis represent the horizontal direction. However, in actual use, the orientation of the entire device can be reversed, and these implementations should be included within the protection scope of this utility model.

[0055] Based on the above scheme, the cutting assembly 20 of this utility model includes a driving part 210 and a cutting part 220, and a second film pressing assembly 40 is mounted on the cutting part 220. The cutting part 220 is used to cut the film material A, and the driving part 210 is used to drive the cutting part 220 and the second film pressing assembly 40 to move.

[0056] The drive unit 210 can drive the cutting unit 220 to perform linear or planar motion. When the cutting unit 220 uses a cutting blade, it needs to directly contact the membrane material A. Therefore, the drive unit 210 drives the cutting blade to move in two dimensions, thereby forming a specific slit on the membrane material A, resulting in the final product shape. Regardless of how the cutting unit 220 moves, the second pressing assembly 40 moves synchronously, always maintaining a close distance between the second pressing assembly 40 and the slit to prevent the membrane material A from warping or deforming.

[0057] When the cutting unit 220 uses a laser cutting assembly, only the laser focus needs to be moved when cutting smaller products, without moving the cutting unit 220 itself. The driving unit 210 is only needed to move the cutting unit 220 when cutting another product or avoiding a collision. Of course, when using laser cutting, the driving unit 210 can also move the entire cutting unit 220 during cutting.

[0058] This utility model provides a specific structure of a second pressing assembly 40, which includes a pressing connector 410, a pressing rod 420, and a pressing plate 430. The pressing connector 410 is fixed to the cutting part 220 and combined with... Figure 5A , Figure 5B As shown, the top end of the pressing connector 410 is fixed to the cutting part 220. The pressing connector 410 can be fixed to the cutting part 220 by welding or bolt connection.

[0059] The pressing connector 410 is provided with a guide groove 411, within which a pressing rod 420 is inserted. Figure 5B As shown, the bottom of the guide groove 411 is provided with an opening, and the pressing rod 420 is inserted from the bottom end of the guide groove 411. The top end of the pressing rod 420 is provided with an enlarged protrusion, and the bottom of the guide groove 411 is provided with a constricting structure to prevent the pressing rod 420 from detaching.

[0060] The lower pressure plate 430 is fixed to one end of the lower pressure rod 420, and the other end of the lower pressure rod 420 is slidably fitted into the guide groove 411, in combination with... Figure 5B As shown, the bottom end of the pressure rod 420 is slidably inserted into the guide groove 411, and the top end of the pressure rod 420 is fixedly installed with a pressure plate 430. The pressure plate 430 is used to apply pressure to the membrane material A. The area of ​​the pressure plate 430 is larger than the cross-sectional area of ​​the pressure rod 420, forming a larger contact area with the membrane material A, which can improve the stability of the extrusion of the membrane material A.

[0061] The lower pressure plate 430 can exert extrusion pressure on the membrane material A by its own weight and the weight of the lower pressure rod 420. In order to further improve the stability of the extrusion of the membrane material A, an elastic element 440 is provided between the lower pressure rod 420 and the lower pressure connector 410. The elastic element 440 applies an outward elastic force to the lower pressure rod 420 to ensure that the lower pressure plate 430 always exerts pressure on the bottom plate 110 and generates continuous and stable pressure on the membrane material A.

[0062] Specifically, the elastic element 440 can be a helical spring. The bottom end of the elastic element 440 contacts the top end of the pressure rod 420, and the top end of the elastic element 440 contacts the top end of the guide groove 411. The elastic element 440 forms an elastic force between the pressure rod 420 and the pressure connector 410.

[0063] Combination Figure 5B As shown, a lower pressure plate 430 is rotatably mounted with balls 450, each ball 450 being independently assembled on the lower pressure plate 430, and each ball 450 being rotatable relative to the lower pressure plate 430. Parts of the balls 450 are exposed outside the lower pressure plate 430, as shown... Figure 5B As shown, the bottom of the ball bearing 450 protrudes from the bottom surface of the lower pressure plate 430, and the ball bearing 450 is used to contact the membrane material A. When the entire second membrane assembly 40 moves relative to the base plate 110, the ball bearing 450 rolls relative to the lower pressure plate 430, which can reduce friction and make the displacement between the second membrane assembly 40 and the base plate 110 smoother.

[0064] Combination Figure 3 As shown, in one embodiment, two second pressing assemblies 40 are installed on the cutting part 220. The two second pressing assemblies 40 are distributed along the X-axis direction. The cutting part 220 is located between the two second pressing assemblies 40, forming a uniform extrusion force on both sides of the area to be cut, ensuring that the area to be cut is tightly attached to the base plate 110.

[0065] The drive unit 210 includes a longitudinal drive assembly 211 and a transverse drive assembly 212, which cooperate to drive the cutting unit 220 to perform two-dimensional planar movement. Figure 3 As shown, in this embodiment, the lateral drive assembly 212 is mounted on the longitudinal drive assembly 211, and the longitudinal drive assembly 211 drives the entire lateral drive assembly 212 to move along the Y-axis direction. The cutting part 220 is mounted on the lateral drive assembly 212, and the lateral drive assembly 212 drives the cutting part 220 to move along the X-axis direction.

[0066] It should be noted that the relative positions of the longitudinal drive assembly 211 and the transverse drive assembly 212 can be interchanged. The longitudinal drive assembly 211 and the transverse drive assembly 212 can adopt a lead screw drive structure, a cylinder drive structure, a robotic arm, or other types of drive structures. All these specific structural forms should be included within the protection scope of this utility model.

[0067] Combination Figure 4A , Figure 4B As shown, the first film pressing assembly 30 of this utility model includes a connecting seat 310, a film pressing plate 320, and a connecting shaft 330. The connecting seat 310 is fixed to the film cutting chamber, and the connecting shaft 330 is fixed to the film pressing plate 320. The film pressing plate 320 is hinged to the connecting seat 310 via the connecting shaft 330, thereby allowing the film pressing plate 320 to rotate relative to the connecting seat 310. The length direction of the connecting shaft 330 is along the Y-axis and parallel to the base plate 110, allowing the film pressing plate 320 to swing up and down relative to the base plate 110.

[0068] A torsion spring 340 is installed between the connecting shaft 330 and the connecting seat 310. The torsion spring 340 applies torque to the connecting shaft 330, causing the pressure plate 320 to tend to move closer to the base plate 110. Under the combined action of the pressure plate 320's own weight and the torque of the torsion spring 340, the pressure plate 320 can be pressed more tightly onto the base plate 110, ensuring the squeezing force on both sides of the membrane material and ensuring that the membrane material remains taut.

[0069] In addition, the first pressing assembly 30 may also be provided with a driving structure for driving the pressing plate 320 to lift upward to release the membrane material A.

[0070] In one embodiment, the cutting unit 220 is a laser cutting component. Laser film cutting is a process that uses high-precision laser technology to cut protective films in a personalized manner. By focusing a laser beam to generate high energy, it can quickly and accurately cut protective films according to preset model parameters. It can not only perfectly adapt to various mobile phone screen sizes and edge curvatures, but also achieve fine processing of complex patterns or irregular openings (such as cameras, sensors, and acoustic holes). Compared with traditional die-cutting, laser film cutting has the advantages of being non-contact, wear-free, and having smooth, burr-free edges. It also supports the universal processing of flexible and rigid films, greatly improving production efficiency and material utilization.

[0071] During the operation of the laser film cutting machine, a high-power-density laser beam is focused on the surface of the material, causing it to rapidly vaporize or melt. At the same time, an auxiliary blowing device blows away the molten material and cools the cutting area, while an exhaust device removes smoke and dust.

[0072] The base plate 110 is provided with mesh holes 111, which are used to avoid the cutting part 220 and prevent laser damage to the base plate 110. The mesh holes 111 also serve as channels for smoke and dust to pass through. A waste collection drawer 120 is provided below the base plate 110 to collect dust and other waste materials in a centralized manner.

[0073] Combination Figure 3 As shown, the mesh hole 111 is a waist hole. The width of the mesh hole 111 should be less than the total width of the ball bearing 450 on the lower pressure plate 430 to avoid the ball bearing 450 getting stuck in the mesh hole 111.

[0074] Furthermore, this utility model provides an unwinding mechanism and a rewinding mechanism in the film cutting chamber. The unwinding mechanism holds a roll of film material A and is used to release film material A to the base plate 110. The rewinding mechanism is used to recover the remaining film material A after cutting.

[0075] Before cutting, the unwinding mechanism releases a section of film material, and the rewinding mechanism collects the waste material from the previous cutting process, allowing the new film material to reach the designated position. When the film material moves, the first pressing assembly 30 needs to be lifted first, and the ball bearings 450 roll relative to the film material, applying continuous extrusion pressure. Automated cutting and forming can be achieved.

[0076] Before laser cutting, the two pressure plates 320 are rotated upwards to place the film material on the base plate 110. After the two sides of the film material are below the pressure plates 320, the pressure plates 320 are released. Through the action of the torsion spring 340, the two ends of the film material are fixed below the fixing plate. The two sides of the film material are fixed by the first pressure assembly 30.

[0077] When laser cutting the film material, the laser cutting assembly (cutting section 220) is driven to move along a preset path by the longitudinal drive assembly 211 and the transverse drive assembly 212. When the laser cutting assembly cuts the mobile phone film (film material) with the laser beam, the second pressing assembly 40 moves with the laser cutting assembly. The elastic element 440 and the pressing rod 420 in the guide groove 411 press the lower pressing plate 430 onto the upper surface of the film material. When the second pressing assembly 40 moves, the ball bearings 450 at the bottom of the lower pressing plate 430 roll on the film material to reduce friction. The second pressing assembly 40 fixes the cut mobile phone film in place, preventing positional displacement after laser cutting and avoiding deviations in the cutting dimensions.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective film laser cutting and positioning device, characterized in that, include: The main body (10) of the film cutting machine is provided with a film cutting chamber, and the bottom plate (110) of the film cutting chamber is used to support the film material; A cutting assembly (20) is disposed in the film cutting chamber and is used to cut the film material; The first pressing assembly (30) is installed in the film cutting chamber and is used to press the two sides of the film material onto the base plate (110); The second pressing assembly (40) is installed on the cutting assembly (20) and is used to press the area of ​​the film to be cut onto the base plate (110).

2. The protective film laser cutting and positioning device according to claim 1, characterized in that, The cutting assembly (20) includes a driving part (210) and a cutting part (220), and the second pressing assembly (40) is mounted on the cutting part (220); the driving part (210) is used to drive the cutting part (220) and the second pressing assembly (40) to move.

3. The protective film laser cutting and positioning device according to claim 2, characterized in that, The second pressing assembly (40) includes a pressing connector (410), a pressing rod (420), and a pressing plate (430). The pressing connector (410) is fixed to the cutting part (220), and the pressing connector (410) is provided with a guide groove (411). The lower pressure plate (430) is fixed to one end of the lower pressure rod (420), and the other end of the lower pressure rod (420) is slidably fitted into the guide groove (411); the lower pressure plate (430) is used to apply pressure to the membrane material.

4. The protective film laser cutting and positioning device according to claim 3, characterized in that, An elastic element (440) is provided between the pressing rod (420) and the pressing connector (410), and the elastic element (440) applies an outward elastic force to the pressing rod (420).

5. The protective film laser cutting and positioning device according to claim 4, characterized in that, The lower pressure plate (430) is rotatably mounted with ball bearings (450), a portion of which is exposed on the lower pressure plate (430) and is used to contact the membrane material.

6. The protective film laser cutting and positioning device according to claim 5, characterized in that, Two second pressure film assemblies (40) are installed on the cutting section (220).

7. The protective film laser cutting and positioning device according to claim 2, characterized in that, The driving unit (210) includes a longitudinal driving component (211) and a transverse driving component (212), which cooperate to drive the cutting unit (220) to move in a two-dimensional plane.

8. The protective film laser cutting and positioning device according to claim 1, characterized in that, The first film pressing assembly (30) includes a connecting seat (310), a film pressing plate (320), and a connecting shaft (330). The connecting seat (310) is fixed to the film cutting chamber, and the connecting shaft (330) is fixed to the film pressing plate (320). The film pressing plate (320) is hinged to the connecting seat (310) through the connecting shaft (330), and a torsion spring (340) applies torque to the connecting shaft (330).

9. The protective film laser cutting and positioning device according to claim 2, characterized in that, The cutting section (220) is a laser cutting assembly; The base plate (110) is provided with mesh holes (111), which are used to avoid the cutting part (220). Waste collection drawer (120) is provided below the base plate (110).

10. The protective film laser cutting and positioning device according to claim 1, characterized in that, The film cutting chamber is provided with an unwinding mechanism and a rewinding mechanism. The unwinding mechanism is used to release the film material to the base plate (110), and the rewinding mechanism is used to recover the remaining film material after cutting.

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