Flexible film high-precision laminating device

Abstract

The invention relates to the technical field of film material laminating, and provides a flexible film high-precision laminating device which comprises a hard board adsorption platform and a film material placing platform which can move relatively, the film material placing platform comprises a curvature adjusting plate which is composed of a plurality of sub-panels, and the adjacent sub-panels are hinged; the flexible liner is fixedly arranged at the top of the curvature adjusting plate; the porous supporting pad is made of a porous material, is fixedly arranged at the top of the flexible liner and is used for supporting the flexible film; the linear displacement driving element is fixedly arranged below the curvature adjusting plate, and the output end of the linear displacement driving element is connected with the middle of the curvature adjusting plate; the supporting bases are fixedly arranged on the two sides of the linear displacement driving element and hinged to the ends of the curvature adjusting plate. According to the invention, bubbles can be effectively prevented from being generated, the fitting precision is improved, and the bending curvature of the whole body formed by the curvature adjusting plate, the flexible liner and the porous support pad can be adjusted, so that the curvature can be freely adjusted according to the size difference requirements of products.

Description

Technical Field

[0001] The present invention relates to the technical field of film material lamination, and in particular to a high-precision lamination device for a flexible film. Background Art

[0002] In the field of material bonding, there are currently two bonding routes: hard-to-hard bonding and soft-to-hard bonding. The hard-to-hard bonding route is a direct extrusion bonding of two materials, which is mainly suitable for products where both bonding materials are relatively thick and hard (such as the bonding of protective glass and liquid crystal glass). The bonding of flexible films is soft-to-hard bonding, and the hard-to-hard method is extremely prone to bubbles.

[0003] Due to the above reasons, currently most flexible films are laminated by directly rolling the flexible films with rollers. In this method, the flexible film is adsorbed on the platform, and the film material platform is placed on the roller during rolling to laminate the film material with the roller movement, resulting in the film material rolling direction being deformed by the roller pressure, which will cause a certain deviation after the flexible film is laminated. The lamination accuracy is low, and it can generally only be used for lamination of films with low accuracy requirements, such as OCA / PSA / conventional Film materials, which generally require an accuracy of ≥50um, and cannot achieve ultra-high accuracy lamination (comprehensive accuracy requirement ≤20um). Moreover, since the flexible film is adsorbed through the vacuum hole, the film material will slide on the vacuum hole when the roller is rolled, which is more likely to cause surface scratches. To solve this scratch, a protective film needs to be attached to the flexible film substrate in advance, which increases the cost of the process, labor and materials. Summary of the invention

[0004] The object of the present invention is to provide a high-precision flexible film laminating device to solve the above-mentioned defects of the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A high-precision laminating device for a flexible film comprises a hard plate adsorption platform and a film material placement platform capable of relative movement, wherein the film material placement platform comprises:

[0007] The curvature adjustment panel is composed of a plurality of sub-panels, and adjacent sub-panels are hinged;

[0008] A flexible pad is fixed on the top of the curvature adjustment plate;

[0009] A porous support pad made of porous material is fixed on the top of the flexible pad to support the flexible film;

[0010] A fixed linear displacement driving element is disposed below the curvature adjustment plate, and an output end thereof is connected to the middle portion of the curvature adjustment plate; and

[0011] The fixed support base is arranged on both sides of the linear displacement driving element and is hinged to the end of the curvature adjustment plate.

[0012] Optionally, a hinged base is provided at each end between adjacent sub-panels, three rotating shafts are arranged in parallel on the hinged base, a gear is provided at each end of each rotating shaft, the gears at corresponding positions on adjacent rotating shafts are meshed with each other, the gears of the rotating shafts on both sides are fixedly connected with a connecting plate, and the connecting plate is fixedly connected to the adjacent sub-panels.

[0013] Optionally, the gear is sleeved on the rotating shaft, a first elastic member is pressed between two gears on the same rotating shaft, and the first elastic member is sleeved on the rotating shaft.

[0014] Optionally, a second elastic member is fixedly connected between adjacent sub-panels.

[0015] Optionally, the hard plate adsorption platform is arranged inside the first cavity, and the film material placement platform is arranged inside the second cavity. After the first cavity and the second cavity are pressed tightly, they enclose and form a closed exhaust cavity to exhaust through the negative pressure equipment.

[0016] Optionally, a vacuum cavity is provided inside the sub-panel, a first vacuum adsorption hole communicating with the vacuum cavity is provided on the top of the sub-panel, and the flexible pad is provided with second vacuum adsorption holes corresponding to the first vacuum holes one by one.

[0017] Optionally, the flexible pad is a silicone pad.

[0018] Optionally, the porous support pad is porous paper.

[0019] Optionally, the laminating device further comprises a CCD alignment device, and the CCD alignment device is arranged between the hard board adsorption platform and the film material placement platform.

[0020] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0021] 1. In the present invention, the whole composed of the curvature adjustment plate, the flexible pad and the porous support pad can be bent into a curved surface. The flexible film is placed on the porous support pad, and the substrate bonded to the flexible film is adsorbed by the hard plate adsorption platform. During bonding, the hard plate adsorption platform and the film material placement platform are relatively close, and pressure is applied. The middle part of the flexible film first contacts the substrate. Under the continuous action of pressure, the flexible pad continues to deform, and the air is discharged from the middle to both sides, effectively avoiding the generation of bubbles. Moreover, the bending curvature of the whole composed of the curvature adjustment plate, the flexible pad and the porous support pad can be adjusted, so that the curvature size can be freely adjusted according to the requirements of product size differences.

[0022] 2. In the present invention, the defects caused by the roller rolling method are avoided, and the bonding accuracy is guaranteed; in addition, the porous support pad is made of porous material, that is, the material itself has nanometer-level (or micrometer-level) holes, the surface is smooth and breathable, avoiding the need to set vacuum holes in the porous support pad by traditional vacuum adsorption, that is, avoiding the deformation of the flexible film due to the vacuum holes set on the porous support pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of a high-precision laminating device for a flexible film before laminating provided in Example 1;

[0024] Figure 2 A schematic diagram of the structure of a high-precision bonding device for a flexible film provided in Example 1 during bonding;

[0025] Figure 3 The structure of the membrane material placement platform in Example 1;

[0026] Figure 4 It is a cross-sectional view of the hinged structure of adjacent sub-panels;

[0027] Figure 5 It is an exploded schematic diagram of the hinged structure of adjacent sub-panels;

[0028] Figure 6 It is a schematic diagram of the connection structure of the hinged base, the rotating shaft, the gear, the connecting plate and the first elastic member;

[0029] Figure 7 A schematic diagram of the structure of a flexible film high-precision laminating device before laminating provided in Example 2;

[0030] Figure 8 A schematic diagram of the structure of a high-precision bonding device for a flexible film provided in Example 2 during bonding;

[0031] Figure markings: 100-membrane material placement platform, 101-curvature adjustment plate, 1011-sub-panel, 1012-hinge base, 1013-rotating shaft, 1014-gear, 1015-connecting plate, 1016-first elastic member, 1017-second elastic member, 102-flexible pad, 103-porous support pad, 104-linear displacement driving element, 105-support base, 106-second cavity, 200-hard plate adsorption platform, 201-first cavity, 300-exhaust cavity, 400-substrate, 500-flexible film. DETAILED DESCRIPTION

[0032] Example 1

[0033] refer to Figure 1 and Figure 3A high-precision bonding device for a flexible film includes a hard plate adsorption platform 200 and a film material placement platform 100 that can move relative to each other. The film material placement platform 100 includes a curvature adjustment plate 101, a flexible pad 102, a porous support pad 103, a linear displacement driving element 104 and a support base 105.

[0034] The flexible pad 102 is fixed on the top of the curvature adjustment plate 101 , and the porous support pad 103 is fixed on the top of the flexible pad 102 for supporting the flexible film 500 . The curvature adjustment plate 101 , the flexible pad 102 and the porous support pad 103 form a whole.

[0035] The flexible pad 102 has good deformation ability, which is convenient for deformation under force during the fitting process. As an option, the flexible pad 102 in this embodiment is a silicone pad. It should be understood that in other embodiments, the flexible pad 102 can of course be other materials, such as latex pad, polyurethane pad, polytetrafluoroethylene pad, etc.

[0036] The porous support pad 103 is made of a porous material, that is, the material itself has nanometer-level (or micrometer-level) holes, a smooth surface and air permeability, avoiding the need to set vacuum holes in the porous support pad 103 in the traditional vacuum adsorption, that is, avoiding deformation of the flexible film 500 due to the vacuum holes set on the porous support pad 103. As an option, the porous support pad 103 in this embodiment is porous paper, and it should be understood that in other embodiments, the porous support pad 103 can also be other materials, such as porous silicon, porous ceramics, carbon nanotube sponge, etc.

[0037] The curvature adjustment plate 101 is composed of a plurality of sub-panels 1011. The sub-panels 1011 can be plates with a certain degree of elasticity or hard plates. Adjacent sub-panels 1011 are hinged. The linear displacement driving element 104 is fixedly arranged below the curvature adjustment plate 101. The output end of the linear displacement driving element 104 (such as a cylinder, an electric push rod, etc.) is connected to the middle part of the curvature adjustment plate 101. The connection method can be a hinged connection or a fixed connection. The support base 105 is fixedly arranged on both sides of the linear displacement driving element 104 and is hinged to the end of the curvature adjustment plate 101. With such arrangement, the output end of the linear displacement driving element 104 is extended to make the curvature adjustment plate 101, the flexible pad 102 and the porous support pad 103 as a whole bend into a curved surface. Before lamination, the flexible film 500 is placed on the porous support pad 103, and the substrate 400 to be laminated with the flexible film 500 is adsorbed by the hard plate adsorption platform 200 (the adsorption method can be conventional vacuum adsorption). During lamination, the hard plate adsorption platform 200 and the film material placement platform 100 are relatively close, and pressure is applied, so that the middle part of the flexible film 500 first contacts the substrate 400 (such as Figure 2As shown in FIG. 1 , under the continuous action of pressure, the flexible pad 102 continues to deform, and the air is discharged from the middle to both sides (the exhaust direction is as shown in FIG. Figure 2 The direction of the arrow in the middle is shown), which effectively avoids the generation of bubbles.

[0038] refer to Figure 4-Figure 6 As an option, the hinged connection between adjacent sub-panels 1011 in this embodiment is as follows: a hinged base 1012 is provided at each end of the adjacent sub-panels 1011, and three rotating shafts 1013 are arranged in parallel on the hinged base 1012. A gear 1014 is provided at each end of each rotating shaft 1013. The gears 1014 at corresponding positions on the adjacent rotating shafts 1013 are meshed with each other. The gears 1014 of the rotating shafts 1013 on both sides are fixedly connected with a connecting plate 1015, and the connecting plate 1015 is fixedly connected to the adjacent sub-panels 1011 (for example, by bonding, riveting, etc.). In practical applications, for example, seven sub-panels 1011 are provided, and the above-mentioned linear displacement driving element 104 is connected to the middlemost sub-panel 1011.

[0039] In some embodiments, the gear 1014 can be an integral structure with the rotating shaft 1013. In this embodiment, the gear 1014 is sleeved on the rotating shaft 1013, that is, the gear 1014 can slide. On this basis, a first elastic member 1016 is pressed between two gears 1014 on the same rotating shaft 1013, and the first elastic member 1016 is sleeved on the rotating shaft 1013. The purpose of the first elastic member 1016 is to elastically press the two gears 1014 tightly, so as to maintain a fixed state of a specific angle when not subjected to external force, without affecting the rotation of the gear 1014. Preferably, the first elastic member 1016 is a spring. Further, in this embodiment, a second elastic member 1017 is fixedly connected between adjacent sub-panels 1011, and its function is to connect two adjacent sub-panels 1011, tighten when the overall curvature of the curvature adjustment plate 101 changes, and make all adjustment panels evenly stressed. The above combination can transmit torque, which is convenient for the curvature adjustment plate to form a better curvature state and achieve a stable effect. As an option, in this embodiment, the first elastic member 1016 and the second elastic member 1017 are both springs.

[0040] In addition, those skilled in the art should understand that in other embodiments, if the stabilizing effect of the curvature adjustment plate 101 is not taken into consideration, of course, adjacent sub-panels 1011 can also be hinged in a conventional manner. For example, adjacent sub-panels 1011 are hinged by means of shaft holes, that is, adjacent sub-panels 1011 are simultaneously arranged on an axis, and adjacent sub-panels 1011 can rotate around the axis.

[0041] It is worth noting that, in actual applications, the hard plate adsorption platform 200 can be arranged at the top and the film material placement platform 100 can be arranged at the bottom (of course, the setting positions of the two can also be exchanged), the hard plate adsorption platform 200 is fixed, and the film material placement platform 100 is lifted and lowered as a whole by a lifting platform (not shown). Furthermore, the bonding device provided in this embodiment also includes a CCD alignment device (not shown), which is arranged between the hard plate adsorption platform 200 and the film material placement platform 100. The CCD alignment device takes pictures through a CCD camera to detect whether the flexible film 500 is aligned with the substrate 400. After the detection is completed, the CCD alignment device exits the photo taking position to avoid affecting the subsequent bonding action. On this basis, it is easy to understand that a positioning compensation mechanism (not shown, which can be a mobile platform capable of moving in two directions) can also be set to adjust the overall position of the film material placement platform 100, so as to better align the flexible film 500 with the substrate 400.

[0042] In this embodiment, a vacuum cavity is provided inside the sub-panel 1011, a first vacuum adsorption hole connected to the vacuum cavity is provided on the top of the sub-panel 1011, and a second vacuum adsorption hole corresponding to the first vacuum hole is provided on the flexible pad 102. Those skilled in the art should understand that in actual applications, the vacuum cavity can be sucked by a negative pressure device, so that the flexible film 500 can be adsorbed with auxiliary negative pressure, thereby ensuring the flatness of the flexible film 500 during the bonding process and further reducing the residual bubbles.

[0043] Example 2

[0044] refer to Figure 7 and Figure 8 This embodiment is further optimized on the basis of the first embodiment. In this embodiment, the hard plate adsorption platform 200 is arranged inside the first cavity 201, and the film material placement platform 100 is arranged inside the second cavity 106. After the first cavity 201 and the second cavity 106 are pressed tightly, they are enclosed to form a closed exhaust cavity 300. In practical applications, the exhaust cavity 300 can be sucked by a negative pressure device to assist exhaust (the exhaust direction is as follows Figure 8 In the direction of the arrow in the middle), it can better reduce bubbles.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision laminating device for flexible films, comprising a hard plate adsorption platform and a film material placement platform capable of relative movement, characterized in that: The membrane material placement platform includes: The curvature adjustment panel is composed of a plurality of sub-panels, and adjacent sub-panels are hinged; A flexible pad is fixed on the top of the curvature adjustment plate; A porous support pad made of porous material is fixed on the top of the flexible pad to support the flexible film; A fixed linear displacement driving element is disposed below the curvature adjustment plate, and an output end thereof is connected to the middle portion of the curvature adjustment plate; and The fixed support base is arranged on both sides of the linear displacement driving element and is hinged to the end of the curvature adjustment plate.

2. The flexible film high-precision laminating device according to claim 1, characterized in that: A hinged base is provided at each end between adjacent sub-panels, and three rotating shafts are arranged in parallel on the hinged base. A gear is provided at each end of each rotating shaft, and the corresponding gears on adjacent rotating shafts are meshed with each other. The gears of the rotating shafts on both sides are fixedly connected with a connecting plate, and the connecting plate is fixedly connected to the adjacent sub-panels.

3. The flexible film high-precision laminating device according to claim 2, characterized in that: The gear is sleeved on the rotating shaft, a first elastic member is pressed between two gears on the same rotating shaft, and the first elastic member is sleeved on the rotating shaft.

4. The flexible film high-precision laminating device according to claim 2, characterized in that: A second elastic member is fixedly connected between adjacent sub-panels.

5. The flexible film high-precision laminating device according to any one of claims 1 to 4, characterized in that: The hard plate adsorption platform is arranged inside the first cavity, and the film material placement platform is arranged inside the second cavity. When the first cavity and the second cavity are pressed tightly together, they enclose and form a closed exhaust cavity to exhaust air through the negative pressure equipment.

6. The flexible film high-precision laminating device according to any one of claims 1 to 4, characterized in that: A vacuum cavity is arranged inside the sub-panel, a first vacuum adsorption hole communicating with the vacuum cavity is arranged on the top of the sub-panel, and the flexible pad is provided with second vacuum adsorption holes corresponding to the first vacuum holes one by one.

7. The flexible film high-precision laminating device according to any one of claims 1 to 4, characterized in that: The flexible pad is a silicone pad.

8. The flexible film high-precision laminating device according to any one of claims 1 to 4, characterized in that: The porous support pad is porous paper.

9. The flexible film high-precision laminating device according to any one of claims 1 to 4, characterized in that: The laminating device also includes a CCD alignment device, which is arranged between the hard plate adsorption platform and the film material placement platform.

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