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CN-122008582-A - Strain forming and attaching device and method suitable for VR (virtual reality) products

CN122008582ACN 122008582 ACN122008582 ACN 122008582ACN-122008582-A

Abstract

The invention discloses a strain type forming and laminating device suitable for VR products and a laminating method thereof, wherein the device comprises a forming module and a laminating module, the forming module consists of a die head, a sealing pressing plate, a silica gel sheet, a lower cavity and a spoiler, the laminating module comprises a laser ranging unit, a CCD visual alignment unit, a dispensing unit and a UV curing unit, the method comprises a pre-stage strain type forming method and a post-stage strain type forming and laminating method, the forming method realizes the accurate forming of a film material through the steps of die head heating, silica gel sheet tensioning, preforming, pressurizing forming and the like, and the laminating method realizes the high-precision laminating of the formed film material and a VR lens through the steps of plasma cleaning, accurate dispensing, CCD alignment, UV curing and the like. The invention realizes the integrated operation of molding and laminating, ensures that the film material is stressed uniformly, improves the laminating precision and the product yield, reduces the production cost, adapts to VR products with different curved surfaces and different materials, and meets the demand of mass production.

Inventors

  • HU ZHENGGUANG
  • SHI LIQUAN
  • LI XIAOGEN
  • LUO DONG
  • Fang Tianguo
  • HE FAZHONG

Assignees

  • 深圳市鑫三力自动化设备有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (9)

  1. 1. The utility model provides a be applicable to VR product strain type shaping laminating device for realize the integration operation of VR product membrane material shaping and lens laminating, its characterized in that includes shaping module, laminating module; The forming module comprises: the vacuum adsorption device comprises a die head (1), wherein a heating unit is arranged in the die head (1), a vacuum adsorption channel is arranged in the die head, and the vacuum adsorption channel is connected with a vacuum generation source; a sealing pressing plate (2) which can move up and down and is provided with a through cavity for the die head (1) to pass through; The silica gel skin (3) is used for sealing; The lower cavity (4) is arranged right below the sealing pressing plate (2) and is provided with a step cavity which penetrates through the upper end and the lower end and is wide in upper part and narrow in lower part, the silica gel skin (3) is arranged at the top of the lower cavity (4) in a tensioning mode, the sealing pressing plate (2) presses down against the silica gel skin (3) so that the silica gel skin (3) fully covers the step cavity, and sealing is formed between the lower cavity (4) and the silica gel skin (3); The spoiler (6) is fixedly arranged in the lower cavity (4) and is positioned in the pressurizing channel area, and the spoiler (6) is used for uniformly dispersing the compressed air in the lower cavity; The laminating module includes: The laser ranging unit is used for measuring the height positions of the formed film and the VR lens; the CCD visual alignment unit comprises an upper CCD camera and a lower CCD camera and is used for photographing and aligning the formed film material and the VR lens; The dispensing unit is linked with the laser ranging unit and the CCD visual alignment unit and is used for precisely dispensing glue; And the UV curing unit is used for curing the glue after lamination.
  2. 2. The device of claim 1, wherein the silicone skin is made of silicone with adjustable tension around.
  3. 3. A strain forming and fitting device for VR products according to claim 1, characterized in that the die head (1) has a curved profile.
  4. 4. A strain type forming and attaching method suitable for VR products, which is characterized in that the forming and attaching device is adopted in any one of claims 1-4.
  5. 5. The method of claim 4, comprising a pre-stage strain forming process and a post-stage strain forming process.
  6. 6. A method according to claim 5 a strain type forming and attaching method of VR products, the strain type forming method is characterized by comprising the following steps of: S1, preparing feeding, namely heating a die head (1) to a working temperature, and stretching and tensioning the silica gel sheet (3) outwards along the periphery; s2, feeding, namely placing the membrane material (5) on the tensioned silica gel skin (3); S3, preforming, namely slowly lowering the die head (1) to a forming pressurizing position, and gradually releasing the tension force along with the lowering of the die head (1) when the die head (1) contacts the film material (5) by the tensioned silica gel skin (3), so as to perform preforming on the film material (5); S4, compression molding, namely, the die head (1) descends to be completely attached to the film material (5), the sealing pressing plate (2) presses down to seal the lower cavity (4), compressed air is filled into the lower cavity (4), air flow uniformly acts on the silica gel sheet (3) through the spoiler (6), and the film material (5) is extruded to be molded towards the die head (1); s5, maintaining pressure and cooling, namely keeping the pressurizing pressure of the lower cavity (4), cooling the die head (1) to room temperature, and eliminating the residual stress of the film material (5); S6, decompression, namely starting the die head (1) for vacuum adsorption, decompressing the lower cavity (4), and lifting the sealing pressing plate (2) to finish the forming of the membrane material (5).
  7. 7. A method according to claim 6 a strain type forming and attaching method of VR products, the method is characterized by comprising the following steps of: s1, feeding and cleaning, namely performing plasma cleaning on a VR lens; s2, dispensing up and down, namely measuring the height positions of the molded film material and the lens through laser, combining CCD visual positioning, and dispensing glue on the top of the convex surface of the molded film material and the bottom of the concave surface of the lens; S3, CCD alignment, namely photographing alignment is carried out on the formed film material and the lens by adopting an upper CCD camera and a lower CCD camera, and horizontal position deviation is corrected; s4, laminating and solidifying, namely driving the formed film material to descend by the die head (1), extruding glue to a preset laminating position, and irradiating and solidifying by using a UV lamp after laminating.
  8. 8. The method according to claim 7, wherein the working temperature of the die head (1) is set according to the material of the film material and is in the range of 80-120 ℃.
  9. 9. The method according to claim 7, wherein the pressurizing pressure of the lower cavity (4) is in the range of 0.2-0.4MPa.

Description

Strain forming and attaching device and method suitable for VR (virtual reality) products Technical Field The invention relates to the technical field of electronic manufacturing, in particular to a strain type forming laminating device and a laminating method suitable for VR products. Background In the production process of near-to-eye display products such as VR/AR, the lamination of an optical film material and a curved lens is one of core processes, and the optical performance and the yield of the products are directly affected. In the prior art, the main stream laminating scheme is mainly divided into two types: 1. The rigid die head laminating process adopts a rigid die matched with the curved surface of the product for direct compression lamination, the scheme has concentrated pressure, is easy to cause damage and deformation of the film material or the lens, and the die needs to be independently opened for different products, has poor universality and cannot be adapted to complex curved surface structures. 2. The flexible PAD pressure head laminating process has the advantages that the flexible pressure heads such as the silica gel PAD are adopted for pressurization, the damage problem of a rigid die head is relieved, the deformation of the silica gel is uncontrollable, the pressure distribution is uneven, the defects of bubbles, wrinkles, local virtual adhesion and the like are easily generated on the laminating surface, the yield is generally lower than 85%, meanwhile, the manufacturing process of the silica gel PAD is complex, the cost is high, the service life is short, and the universality is poor. In addition, the existing lamination process is mostly operated step by 'forming and lamination', multiple sets of carriers and equipment are needed, the process is complicated, the extrusion force of the lamination process is large, deformation displacement of products is easy to occur, the lamination precision is difficult to meet the high-precision requirement of +/-0.02 mm of VR products, and the lamination process becomes a core bottleneck of industrial mass production. The corresponding existing device also has the problems of complex structure, poor universality, insufficient precision, easiness in causing product defects and the like. Disclosure of Invention Aiming at the problems of low yield, uneven pressure, easy damage and deformation of products, more bubble folds, poor laminating precision, insufficient universality and the like of the VR product laminating process in the prior art and the defects of unreasonable structure and poor adaptability of the existing device, the invention provides the strain type forming laminating device and the laminating method thereof suitable for VR products, which realize integral forming and laminating operation, improve laminating precision and product yield, reduce production cost and adapt to the mass production requirements of VR products with complex curved surfaces. In order to solve the technical problems, the invention is realized by the following scheme that the strain type forming and attaching device suitable for the VR product is used for realizing the integrated operation of forming the film material of the VR product and attaching the lens, and comprises a forming module and an attaching module; The forming module comprises: The die head is internally provided with a heating unit, a vacuum adsorption channel is arranged in the die head, and the vacuum adsorption channel is connected with a vacuum generation source; A sealing pressing plate which can move up and down and is provided with a through cavity for the die head to pass through; the silica gel skin is used for sealing; The lower cavity is arranged right below the sealing pressing plate and is provided with a step cavity which penetrates through the upper end and the lower end and is wide in upper part and narrow in lower part, the silica gel skin is arranged at the top of the lower cavity in a tensioning mode, the sealing pressing plate presses down against the silica gel skin to enable the silica gel skin to fully cover the step cavity, and sealing is formed between the lower cavity and the silica gel skin; the spoiler is fixedly arranged in the lower cavity and positioned in the pressurizing channel area and is used for uniformly dispersing the compressed air in the lower cavity; The laminating module includes: The laser ranging unit is used for measuring the height positions of the formed film and the VR lens; the CCD visual alignment unit comprises an upper CCD camera and a lower CCD camera and is used for photographing and aligning the formed film material and the VR lens; The dispensing unit is linked with the laser ranging unit and the CCD visual alignment unit and is used for precisely dispensing glue; And the UV curing unit is used for curing the glue after lamination. Further, the silica gel is made of silica gel capable of adjusting the tension force along the periphery.