Injection molding process acrylic naked eye 3D grating light guide plate mold and 3D grating manufacturing method

Abstract

The invention discloses an injection molding process acrylic naked eye 3D grating light guide plate mold and a 3D grating manufacturing method, and aims to solve the technical problems that a current 3D grating film manufacturing mode is high in cost and low in production efficiency. The mold comprises an injection mold and a fixed mold; a plurality of cylindrical lenses which are arranged in sequence are arranged in the injection molding groove of the injection molding mold, a nozzle communicated with the injection molding groove is formed in the injection molding mold, and the injection molding groove forms an injection molding cavity after the injection molding mold extrudes the fixed mold; according to the method, the 3D grating is directly and integrally formed through the injection molding process, the required 3D grating light guide plate size can be formed at a time according to the required size, and the technical problem of precision errors caused by existing cutting is solved.

Description

Technical Field

[0001] The present invention relates to, in particular to, an acrylic naked-eye 3D grating light guide plate mold using an injection molding process and a 3D grating manufacturing method. Background Art

[0002] At present, the traditional 3D solution is to attach a 3D grating film of corresponding size to a 2D screen, and achieve the naked eye 3D effect through the 3D optical texture on the grating film. The production of 3D grating film usually uses a large PET film, and uses a rolling process on the top of the film to emboss the 3D optical texture on the PET, and then cut the film into multiple small pieces to supply products of different sizes. Due to the special effects of PET materials, there will be certain errors during cutting, which will cause errors in the 3D optical texture on the cut small pieces of PET. When it is finally attached to the screen, manual alignment and calibration are required, which reduces production efficiency and has a considerable labor cost. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, adapt to actual needs, and provide an injection molding process acrylic naked-eye 3D grating light guide plate mold and a 3D grating production method to solve the technical problems of high cost and low production efficiency of the current 3D grating film production method.

[0004] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is: The present invention discloses an acrylic naked-eye 3D grating production mold by injection molding process, comprising an injection mold and a fixed mold. An inwardly concave injection molding groove is provided on the extrusion surface of the injection mold, and a plurality of cylindrical lenses arranged in sequence are provided in the injection molding groove of the injection mold. A nozzle connected to the injection molding groove is provided on the injection mold, and the injection molding groove forms an injection molding cavity after the injection mold extrude the fixed film.

[0005] The injection mold includes a front mold and a rear mold, the extrusion surfaces of the front mold and the rear mold are provided with an inwardly recessed injection groove, the front mold and the rear mold are provided with a nozzle connected to the injection groove, and the front mold and the rear mold are respectively located on both sides of the fixed mold to extrude the fixed film to form an injection cavity with the injection groove.

[0006] A plurality of cylindrical lenses are arranged in parallel and tilted, and the angle direction of the cylindrical lenses tilts from the upper left to the lower right.

[0007] The inclination angle a of the cylindrical lens is 9.41 0 -9.48 0 .

[0008] The curvature radius R of the cylindrical lens is 306.00-307.00 um.

[0009] The injection molding groove is rectangular.

[0010] The arch height of the cylindrical lens is 39.00-39.99um.

[0011] The front mold and the rear mold are respectively provided with cooling channels, and the cooling channels are used for flowing cooling liquid to cool the 3D grating after injection molding.

[0012] Furthermore, the present invention also discloses a method for manufacturing an acrylic naked-eye 3D grating by injection molding, wherein the method uses the above-mentioned acrylic naked-eye 3D grating by injection molding to manufacture a mold, and comprises the following steps: (1) Close the mold; in order to start injection molding, the mold must first be moved to the injection molding machine and aligned and closed. The mold is powered by a hydraulic system to close.

[0013] (2) Locking the mold: Execute the locking procedure in the injection molding machine to ensure that the mold is completely closed and locked.

[0014] (3) Plastic injection: The injection molding machine feeds the plastic raw material into the injection cavity through an inlet connected to the nozzle. After the plastic is melted, it enters the mold through the nozzle, filling the mold cavity until a part or product of the desired shape is formed.

[0015] (4) Pressure maintenance: After the part fully fills the mold cavity, the injection molding machine will apply a certain pressure between the barrel and the mold to ensure the appearance and performance quality of the part.

[0016] (5) Plastic cooling: After sufficient pressure maintenance, continue to apply pressure during cooling, and use the cooling system in the mold to quickly reduce the surface temperature of the part to below its initial hardening point to achieve plastic cooling and solidification.

[0017] (6) Mold opening: When the injection molding machine completes all the steps of manufacturing the product, the mold is opened through the hydraulic system and the part is pushed out of the mold.

[0018] (7) After trimming the parts, the parts are obtained.

[0019] The beneficial effects of the present invention are: The present invention forms an acrylic naked-eye 3D grating light guide plate through an injection molding process, and directly makes a 3D optical texture on the light guide plate. The 3D optical texture can be directly attached thereto through the injection molding process. The advantage is that since the light guide plate is integrally formed by injection molding, a mold of any size can be made. Unlike traditional grating films that are cut from large pieces, the present invention has no errors, so no manual alignment and calibration is required during bonding, and machine bonding can be directly used, which greatly reduces labor costs and improves production efficiency.

[0020] Therefore, the naked-eye 3D grating mold of the present invention can directly form a 3D grating in one piece through an injection molding process, and can form the required 3D grating light guide plate size at one time according to the required size, eliminating the technical problem of precision error caused by existing cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the planar structure of the front mold in the present invention; Figure 2 It is a schematic diagram of the plane structure of the rear mold in the present invention; Figure 3 It is a schematic diagram of the positional relationship between the front mold, the rear mold and the fixed mold after mold locking in the present invention; Figure 4 It is a schematic diagram of the inclination angle of the cylindrical lens and the injection molding groove and related parameters of the cylindrical lens in the present invention.

[0022] Figure 5 Schematic diagram of parameters related to the cross-sectional dimensions of the cylindrical lens in the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Example 1: An injection molding process for making a mold for acrylic naked-eye 3D grating, see Figures 1 to 5 .

[0024] It includes an injection mold and a fixed mold 6. An inwardly concave injection groove 3 is provided on the extrusion surface of the injection mold, and the injection groove is rectangular. A plurality of cylindrical lenses are arranged in sequence in the injection groove 3 of the injection mold. Specifically, the injection mold includes a front mold and a rear mold 2. The inwardly concave injection groove 3 is provided on the extrusion surface of the front mold 1 and the rear mold 2, respectively. A nozzle 8 connected to the injection groove 3 is provided on the front mold 1 and the rear mold 2. The front mold 1 and the rear mold 2 are respectively located on both sides of the fixed mold 6 to extrude the fixed film 6 to form an injection cavity.

[0025] Furthermore, in this embodiment, a plurality of cylindrical lenses 4 are arranged in parallel and tilted, and the cylindrical lenses 4 tilt from the upper left to the lower right. Specifically, the tilt angle a of the cylindrical lenses is 9.41 0 or 9.48 0 or 9.4623 0 The curvature radius R of the cylindrical lens 4 is 306.00um, 307.00um, 307.05um or 306.54um. The arch height of the cylindrical lens is 39.00um, 39.99um or 39.275um. The pitch (vertical) of the cylindrical lens is 300.24um.

[0026] Furthermore, cooling channels 5 are respectively provided in the front mold 1 and the rear mold 2, and the cooling channels are used for flowing cooling liquid to cool the 3D grating after injection molding.

[0027] Embodiment 2, a method for manufacturing an acrylic naked-eye 3D grating by injection molding process, the method of this embodiment uses the injection molding process acrylic naked-eye 3D grating manufacturing mold as described in Embodiment 1, and comprises the following steps: (1) Close the mold; in order to start injection molding, the mold must first be moved to the injection molding machine and aligned and closed. The mold is powered by a hydraulic system to close.

[0028] (2) Locking the mold: Execute the locking procedure in the injection molding machine to ensure that the mold is completely closed and locked.

[0029] (3) Plastic injection: The injection molding machine feeds the plastic raw material into the injection cavity through an inlet connected to the nozzle. After the plastic is melted, it enters the mold through the nozzle, filling the mold cavity until a part or product of the desired shape is formed.

[0030] (4) Pressure maintenance: After the part fully fills the mold cavity, the injection molding machine will apply a certain pressure between the barrel and the mold to ensure the appearance and performance quality of the part.

[0031] (5) Plastic cooling: After sufficient pressure maintenance, continue to apply pressure during cooling, and use the cooling system in the mold to quickly reduce the surface temperature of the part to below its initial hardening point to achieve plastic cooling and solidification.

[0032] (6) Mold opening: When the injection molding machine completes all the steps of manufacturing the product, the mold is opened through the hydraulic system and the part is pushed out of the mold.

[0033] (7) After trimming the parts, the parts are obtained.

[0034] In summary, the present invention forms an acrylic naked-eye 3D grating light guide plate through an injection molding process, and directly makes 3D optical patterns on the light guide plate. The 3D optical patterns can be directly attached thereto through the injection molding process. The advantages are: since the light guide plate is integrally formed by injection molding, molds of any size can be made, and unlike traditional grating films that are cut from large pieces, the present invention has no errors, so manual alignment and calibration are not required during bonding, and machine bonding can be directly used, which greatly reduces labor costs and improves production efficiency.

[0035] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An injection molding acrylic naked eye 3D grating production mold, characterized by: The invention comprises an injection mold and a fixed mold. The extrusion surface of the injection mold is provided with an inwardly concave injection groove. The injection groove of the injection mold is provided with a plurality of cylindrical lenses arranged in sequence. The injection mold is provided with a nozzle connected with the injection groove. After the injection mold extrude the fixed film, the injection groove forms an injection cavity.

2. The injection molding acrylic naked-eye 3D grating production mold according to claim 1, characterized in that: The injection mold includes a front mold and a rear mold, the extrusion surfaces of the front mold and the rear mold are provided with an inwardly recessed injection groove, the front mold and the rear mold are provided with a nozzle connected to the injection groove, and the front mold and the rear mold are respectively located on both sides of the fixed mold to extrude the fixed film to form an injection cavity with the injection groove.

3. The injection molding acrylic naked-eye 3D grating production mold according to claim 2 or 3, characterized in that: A plurality of cylindrical lenses are arranged in parallel and tilted, and the angle direction of the cylindrical lenses tilts from the upper left to the lower right.

4. The injection molding acrylic naked-eye 3D grating production mold according to claim 3, characterized in that: The inclination angle a of the cylindrical lens is 9.41 0 -9.48 0 .

5. The injection molding acrylic naked-eye 3D grating production mold according to claim 3, characterized in that: The curvature radius R of the cylindrical lens is 306.00-307.00 um.

6. The injection molding acrylic naked-eye 3D grating production mold according to claim 3, characterized in that: The injection molding groove is rectangular.

7. The injection molding acrylic naked-eye 3D grating production mold according to claim 3, characterized in that: The arch height of the cylindrical lens is 39.00-39.99um.

8. The injection molding acrylic naked-eye 3D grating production mold according to claim 2, characterized in that: The front mold and the rear mold are respectively provided with cooling channels, and the cooling channels are used for flowing cooling liquid to cool the 3D grating after injection molding.

9. A method for manufacturing an acrylic naked-eye 3D grating by injection molding, characterized in that: The method uses the injection molding process of acrylic naked-eye 3D grating to make a mold according to any one of claims 1 to 8, comprising the following steps: (1) Close the mold; (2) Clamping; (3) Plastic injection; (4) Pressure maintenance; (5) Plastic cooling; (6) Mold opening; (7) Repair of parts.

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