Light guide plate injection molding mold

Abstract

The utility model relates to light guide plate production technical field especially relates to a light guide plate injection moulding mould, including base, the base upper end front and upper end rear portion all are fixedly connected with two support rods, four the support rod upper end common fixedly connected with back mould, the base upper end four corners all are fixedly connected with balance guide rod, four the balance guide rod upper end all are fixedly connected with anti -drop block, the base rear end fixedly connected with lifting device, the lifting device front end fixedly connected with front mould. The utility model discloses a light guide plate injection moulding mould, through the needle in injection mould synchronously completes the hole site forming, need not subsequent drilling processing, and the processing efficiency is greatly promoted, simultaneously avoided all sorts of defects in the drilling process, and the product yield is improved, and then effectively improved the production capacity.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate production technology, and in particular to a light guide plate injection molding mold. Background Technology

[0002] With the rapid development of the smartphone industry, consumers' demands for screen-to-body ratio have continued to rise, driving the continuous iteration and upgrading of mobile phone display modules. From the early notch screen and waterdrop screen, it has gradually evolved to the current mainstream punch-hole screen. With its efficient use of screen space, the punch-hole screen has become the core direction for major mobile phone manufacturers to enhance product competitiveness. In existing manufacturing processes for light guide plates in punch-hole display modules, hole forming often employs a "diamond-cut drilling and polishing after injection molding" method. This involves drilling pre-set holes at predetermined locations using a high-precision diamond cutter after the main body of the light guide plate is injection molded, while simultaneously polishing the hole walls to ensure the optical performance of the light guide plate. However, diamond-cut drilling requires processing each hole individually, resulting in long processing times per piece and low overall efficiency. Furthermore, the drilling process is prone to defects such as hole misalignment and rough hole walls due to tool wear and positioning deviations, leading to low product yield. These dual limitations of efficiency and yield directly restrict production capacity. Therefore, we have introduced a new injection molding mold for light guide plates. Utility Model Content

[0003] The main purpose of this utility model is to provide a light guide plate injection molding mold, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A light guide plate injection molding mold includes a base, two support rods are fixedly connected to the front and rear of the upper end of the base, a rear mold is fixedly connected to the upper ends of the four support rods, balance guide rods are fixedly connected to the four corners of the upper end of the base, anti-detachment blocks are fixedly connected to the upper ends of the four balance guide rods, a lifting device is fixedly connected to the rear end of the base, and a front mold is fixedly connected to the front end of the lifting device.

[0005] Preferably, the front mold includes a front mold body, with two second guide blocks fixedly connected to the left and right ends of the front mold body, a sealing frame fixedly connected to the lower edge of the front mold body, and a through-hole in the upper middle part of the front mold body, with a pull pin movably sleeved in the through-hole.

[0006] By adopting the above technical solution: the movable hole is adapted to the needle installation, and the needle can directly realize the injection molding of the light guide plate hole, eliminating the drilling process.

[0007] Preferably, the rear mold includes a rear mold body, a molding cavity is formed in the middle of the upper end of the rear mold body, a sealing groove is formed at the upper edge of the rear mold body, and the lower end of the rear mold body is fixedly connected to the upper end of the support rod.

[0008] By adopting the above technical solution, the molding cavity provides space for the molding of the light guide plate body.

[0009] Preferably, the lifting device includes a U-shaped frame, the inner rear wall of the U-shaped frame has a through guide groove, a servo motor is fixedly installed on the lower inner wall of the U-shaped frame, a fixing rod is fixedly installed on the output end of the servo motor, a screw is fixedly connected to the upper end of the fixing rod, a transmission plate is threaded to the outer surface of the screw, a first guide block is fixedly connected to the middle of the rear end of the transmission plate, and fixing plates are fixedly connected to the left and right front ends of the transmission plate. The front end of the U-shaped frame is fixedly connected to the rear end of the base.

[0010] By adopting the above technical solution: the servo motor provides stable power, which drives the transmission plate to move through the fixed rod and screw. The fixed plate provides support for the connection of the front mold, thereby realizing the mechanical control of the lifting and lowering of the front mold.

[0011] Preferably, the upper end of the screw is movably connected to the upper inner wall of the U-shaped frame via a rotating shaft, and the first guide block is movably sleeved in the guide groove.

[0012] By adopting the above technical solution, the first guide block cooperates with the guide groove to limit the offset of the transmission plate and ensure accurate lifting and lowering movements.

[0013] Preferably, the rear end of the front mold body is fixedly connected to the front end of the fixing plate, and the four second guide blocks are respectively movably sleeved on the corresponding balance guide rods.

[0014] By adopting the above technical solution, the second guide block cooperates with the balance guide rod to further improve the balance during the lifting process of the front mold and avoid positional deviation.

[0015] Preferably, the size of the sealing frame is compatible with the size of the sealing groove, and their positions correspond.

[0016] By adopting the above technical solution, the sealing frame can be accurately embedded in the sealing groove when the front mold and the rear mold are closed, forming a reliable sealing structure, preventing leakage of injection molding materials, and ensuring the molding quality of the light guide plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the servo motor in the lifting device drives the front mold to rise, and the extraction pin is installed in the movable hole of the front mold body and aligned with the opening position of the rear mold forming cavity. Then, the front mold is driven to fall and close with the rear mold. The sealing frame and sealing groove cooperate to ensure the sealing effect. After the raw material is injected into the forming cavity and cooled and formed, the mold is opened and the extraction pin is pulled out. The required hole can be directly formed on the light guide plate. The entire process is completed synchronously in the injection mold by the extraction pin, without the need for subsequent drilling. The processing efficiency is greatly improved, and various defects in the drilling process are avoided. The product yield is significantly improved, thereby effectively increasing the production capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a light guide plate injection molding die according to the present invention; Figure 2 This is a schematic diagram of the rear mold of a light guide plate injection molding die according to the present invention; Figure 3 This is a cross-sectional view of the rear mold of a light guide plate injection molding die according to the present invention (the rear mold body is cut out). Figure 4 This is a schematic diagram of the lifting device for a light guide plate injection molding die according to the present invention; Figure 5 This is a schematic diagram of the front mold of a light guide plate injection molding die according to the present invention; Figure 6 This is a cross-sectional view of the front mold of a light guide plate injection molding die according to the present invention (the front mold body is cut out).

[0019] In the diagram: 1. Base; 2. Support rod; 3. Rear mold; 4. Balance guide rod; 5. Anti-detachment block; 6. Lifting device; 7. Front mold; 31. Rear mold body; 32. Molding cavity; 33. Sealing groove; 61. U-shaped frame; 62. Guide groove; 63. Servo motor; 64. Fixing rod; 65. Screw; 66. Transmission plate; 67. First guide block; 68. Fixing plate; 71. Front mold body; 72. Pull pin; 73. Second guide block; 74. Sealing frame; 75. Movable hole. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-6 This utility model provides a technical solution: A light guide plate injection molding die includes a base 1. Two support rods 2 are fixedly connected to the front and rear of the upper end of the base 1. A rear mold 3 is fixedly connected to the upper end of the four support rods 2. Balance guide rods 4 are fixedly connected to the four corners of the upper end of the base 1. Anti-detachment blocks 5 are fixedly connected to the upper end of the four balance guide rods 4. A lifting device 6 is fixedly connected to the rear end of the base 1. A front mold 7 is fixedly connected to the front end of the lifting device 6.

[0024] In this embodiment, the front mold 7 includes a front mold body 71, with two second guide blocks 73 fixedly connected to the left and right ends of the front mold body 71. A sealing frame 74 is fixedly connected to the lower edge of the front mold body 71. A through-hole 75 is opened in the middle of the upper end of the front mold body 71, and a pull pin 72 is movably sleeved in the through-hole 75. The rear mold 3 includes a rear mold body 31, with a molding cavity 32 opened in the middle of the upper end of the rear mold body 31. A sealing groove 33 is opened at the upper edge of the rear mold body 31. The lower end of the rear mold body 31 is fixedly connected to the upper end of the support rod 2. The lifting device 6 includes a frame 61, with a through-hole 62 opened on the rear inner wall of the frame 61. A servo motor 63 is fixedly installed on the lower inner wall of the frame 61. The servo motor 63 outputs... A fixing rod 64 is fixedly installed at the outlet end, and a screw 65 is fixedly connected to the upper end of the fixing rod 64. A transmission plate 66 is threadedly connected to the outer surface of the screw 65. A first guide block 67 is fixedly connected to the middle of the rear end of the transmission plate 66. Fixing plates 68 are fixedly connected to the left and right front ends of the transmission plate 66. The front end of the U-shaped frame 61 is fixedly connected to the rear end of the base 1. The upper end of the screw 65 is movably connected to the upper inner wall of the U-shaped frame 61 through a rotating shaft. The first guide block 67 is movably sleeved in the guide groove 62. The rear end of the front mold body 71 is fixedly connected to the front end of the fixing plate 68. Four second guide blocks 73 are movably sleeved on the corresponding balance guide rods 4. The size of the sealing frame 74 is compatible with the size of the sealing groove 33, and their positions are corresponding.

[0025] It should be noted that this utility model is a light guide plate injection molding mold. In use, the servo motor 63 in the lifting device 6 is activated, driving the fixed rod 64 and screw 65 to rotate. The screw 65 drives the transmission plate 66, which is threaded to its outer surface, to move upwards. The first guide block 67 at the rear end of the transmission plate 66 slides smoothly along the guide groove 62 of the U-shaped frame 61. Simultaneously, the transmission plate 66 drives the front mold 7 to rise synchronously through the fixed plate 68. The second guide blocks 73 at both ends of the front mold body 71 slide along the corresponding balance guide rods 4, ensuring stable lifting of the front mold 7. After the front mold 7 rises to a suitable height, the servo motor 63 is turned off, and the needle puller 72 is movably engaged in the movable hole 75 of the front mold body 71, so that... The lower end of the needle 72 is aligned with the position where the light guide plate needs to be opened in the molding cavity 32 of the rear mold 3. The servo motor 63 is started again to drive the transmission plate 66 to lower the front mold 7 until the sealing frame 74 at the lower end of the front mold body 71 is embedded in the sealing groove 33 at the upper end of the rear mold body 31, thus achieving sealing and mold closing between the front mold 7 and the rear mold 3. Molten injection material is injected into the molding cavity 32 of the rear mold 3 through the injection molding equipment. After the material cools and solidifies in the molding cavity 32, the servo motor 63 is started to drive the transmission plate 66 to raise the front mold 7 to open the mold. Then the needle 72 is pulled out from the movable hole 75, and the required hole is formed on the light guide plate at the position corresponding to the needle 72. Finally, the formed light guide plate is taken out from the molding cavity 32 of the rear mold 3.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A light guide plate injection molding mold, comprising a base (1), characterized in that: The base (1) has two support rods (2) fixedly connected to the front and rear of the upper end. The upper ends of the four support rods (2) are all fixedly connected to the rear mold (3). The four corners of the upper end of the base (1) are all fixedly connected to the balance guide rods (4). The upper ends of the four balance guide rods (4) are all fixedly connected to the anti-detachment block (5). The rear end of the base (1) is fixedly connected to the lifting device (6). The front end of the lifting device (6) is fixedly connected to the front mold (7). The front mold (7) includes a front mold body (71), with two second guide blocks (73) fixedly connected to the left and right ends of the front mold body (71), a sealing frame (74) fixedly connected to the lower edge of the front mold body (71), and an upper through hole (75) opened in the middle of the upper end of the front mold body (71), with a pull pin (72) movably sleeved in the through hole (75).

2. The light guide plate injection molding die according to claim 1, characterized in that: The rear mold (3) includes a rear mold body (31), a molding cavity (32) is opened in the middle of the upper end of the rear mold body (31), a sealing groove (33) is opened at the upper edge of the rear mold body (31), and the lower end of the rear mold body (31) is fixedly connected to the upper end of the support rod (2).

3. The light guide plate injection molding die according to claim 1, characterized in that: The lifting device (6) includes a U-shaped frame (61). The inner rear wall of the U-shaped frame (61) has a guide groove (62) that passes through both the inside and outside. A servo motor (63) is fixedly installed on the lower inner wall of the U-shaped frame (61). A fixing rod (64) is fixedly installed at the output end of the servo motor (63). A screw (65) is fixedly connected to the upper end of the fixing rod (64). A transmission plate (66) is threadedly connected to the outer surface of the screw (65). A first guide block (67) is fixedly connected to the middle of the rear end of the transmission plate (66). Fixing plates (68) are fixedly connected to the left and right front ends of the transmission plate (66). The front end of the U-shaped frame (61) is fixedly connected to the rear end of the base (1).

4. The light guide plate injection molding die according to claim 3, characterized in that: The upper end of the screw (65) is movably connected to the upper inner wall of the frame (61) via a rotating shaft, and the first guide block (67) is movably sleeved in the guide groove (62).

5. The light guide plate injection molding die according to claim 1, characterized in that: The rear end of the front mold body (71) is fixedly connected to the front end of the fixing plate (68), and the four second guide blocks (73) are respectively movably sleeved on the corresponding balance guide rods (4).

6. The light guide plate injection molding die according to claim 1, characterized in that: The size of the sealing frame (74) is compatible with the size of the sealing groove (33), and their positions are corresponding.

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