A light guide plate and a light guide plate injection mold capable of dispensing with a diffusion film and a brightness enhancement film
Patent Information
- Application Number
- CN202522211831.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-10-20
AI Technical Summary
在现有技术中，常用的做法是将导光板上侧面做磨面，导光板下表面（微结构面）做网点微结构，这种做法在无扩散膜和增光膜的情况下亮度低且透点，特别是厚度在5mm以上的厚导光板，光线在进入导光板之后，光线在导光板上下表面之间的入射角非常大，这使得光线在板内传播的路径更平，更倾向于在导光板内部进行长距离的弹跳，而不是像在薄导光板中那样快速地在上下表面间反射，在这种状态下，传统的微小网点很难有效拦截到这些光线，在部分光线会直接越过网点，继续向前传播，导致靠近光源的一端较亮，而远端则比较暗，均匀性差，并使得整体亮度较差，不能满足背光模组的实际亮度需求
[0011]本实用新型的技术效果是：（1）本实用新型由于在导光板的出光面之上间隔设有多条相互平行的第一“V”形槽，第一“V”形槽与入光面相平行，第一“V”形槽的深度为0.6～0.8µm，第一“V”形槽的横截面夹角为115～125度，因此，当本该射向侧面或远处的光线，能够被第一“V”形槽反射回板内，经过二次反射后从槽与槽之间的平面区域垂直射出，出光面由槽壁（非出光区）和槽间平面（主要出光区）组成，形成非常高的视觉亮度，视觉效果好；（2）本实用新型由于从出光面的靠近入光面的一端至出光面的远离入光面的一端，相邻第一“V”形槽之间的间距逐渐变窄，在出光面的靠近入光面的一端，相邻第一“V”形槽之间的间距为180～220µm，在出光面的远离入光面的一端，相邻第一“V”形槽之间的间距为85～95µm，这一结构特征能够避免靠近入光面的一端过度消耗光线，防止形成过亮的亮斑，同时让足够多的光线能够继续深入，传播到导光板的远端，使远端较多的第一“V”形槽取用光线，从而提高导光板的均匀性；（3）本实用新型由于在导光板的微结构面之上等间距间隔设有多条相互平行的第二“V”形槽，第二“V”形槽与入光面相垂直，第二“V”形槽的深度为2.5～3.5µm，第二“V”形槽的横截面夹角为75～85度，相邻第二“V”形槽之间的间距为35～45µm，因此，第二“V”形槽的斜面形成微小的镜面，当光线以极大的角度射向这个斜面时，会发生镜面反射，直接将光线反射向导光板上侧面，强制其射出，对光线的捕捉和转向能力极强，从而提升导光板亮度和光线均匀性，适用于厚度为5mm以上的厚导光板，并且摒弃了传统网点式微结构，导光板不透点；基于以上技术效果，使得本实用新型导光板在省去扩散膜和增光膜之后，仍然能够保证导光板具有较高的亮度并且亮度均匀性好、不透点，省去扩散膜和增光膜，组装工序减少、组装效率也得到很大提高、产量提升，成本降低。
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Figure CN224696092U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of light guide plate technology, and in particular to a light guide plate and a light guide plate injection mold that can eliminate the need for a diffusion film and a brightness enhancement film. Background Technology
[0002] Due to intense market competition and increasingly lower unit prices in the automotive and industrial backlight module markets, in order to reduce the cost of backlight modules, for medium and large-sized thick light guide plates (with a thickness of 5mm or more), it is necessary to omit the diffusion film and brightness enhancement film on the upper surface (light-emitting surface) of the light guide plate. In existing technologies, a common practice is to grind the upper surface of the light guide plate and create a dotted microstructure on the lower surface (microstructure surface). This approach results in low brightness and high transmittance without diffusion and brightness enhancement films, especially for thick light guide plates with a thickness of 5mm or more. After entering the light guide plate, the incident angle between the upper and lower surfaces of the light is very large. This makes the light propagation path within the plate flatter and more prone to bouncing a long distance inside the light guide plate, rather than reflecting quickly between the upper and lower surfaces as in thin light guide plates. Under these conditions, traditional micro-dots are difficult to effectively intercept these rays. Some rays will directly pass through the dots and continue to propagate forward, resulting in a brighter end near the light source and a darker end at the far end. This leads to poor uniformity and overall poor brightness, failing to meet the actual brightness requirements of the backlight module. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a light guide plate that eliminates the need for a diffusion film and a brightness enhancement film, based on the shortcomings of the above-mentioned technology. After eliminating the diffusion film and the brightness enhancement film, the light guide plate can still ensure that it has high brightness, good brightness uniformity, and no light penetration. At the same time, this utility model also provides a light guide plate injection mold for injection molding the light guide plate.
[0004] To solve the first technical problem mentioned above, the technical solution of this utility model is: a light guide plate that eliminates the need for a diffusion film and a brightness enhancement film. The upper side of the light guide plate is the light-emitting surface, the lower side of the light guide plate is the microstructure surface, and one end of the light guide plate is the light-incident surface. The light-incident surface is perpendicular to both the light-emitting surface and the microstructure surface. Multiple parallel first "V"-shaped grooves are spaced apart on the light-emitting surface of the light guide plate. The first "V"-shaped grooves are parallel to the light-incident surface, have a depth of 0.6–0.8 µm, and a cross-sectional angle of 115–125 degrees, extending from the end of the light-emitting surface closest to the light-incident surface to the end furthest from the light-emitting surface. At one end of the light-incident surface, the spacing between adjacent first "V" shaped grooves gradually narrows; at the end of the light-exiting surface closer to the light-incident surface, the spacing between adjacent first "V" shaped grooves is 180–220 µm; at the end of the light-exiting surface farther from the light-incident surface, the spacing between adjacent first "V" shaped grooves is 85–95 µm; multiple parallel second "V" shaped grooves are evenly spaced on the microstructure surface of the light guide plate, the second "V" shaped grooves are perpendicular to the light-incident surface, the depth of the second "V" shaped grooves is 2.5–3.5 µm, the included angle of the cross-section of the second "V" shaped grooves is 75–85 degrees, and the spacing between adjacent second "V" shaped grooves is 35–45 µm.
[0005] Preferably, the depth of the first "V" shaped groove is 0.7µm, the included angle of the cross section of the first "V" shaped groove is 120 degrees, and the distance between adjacent first "V" shaped grooves is 200µm at the end of the light-emitting surface near the light-incident surface; and the distance between adjacent first "V" shaped grooves is 90µm at the end of the light-emitting surface away from the light-incident surface; the depth of the second "V" shaped groove is 3µm, the included angle of the cross section of the second "V" shaped groove is 80 degrees, and the distance between adjacent second "V" shaped grooves is 40µm.
[0006] To solve the second technical problem mentioned above, the technical solution of this utility model is: a light guide plate injection mold for injection molding the light guide plate, comprising a base plate, a support plate, a lower template, a lower mold core, a U-shaped surrounding block, an upper template, and an upper mold core. Two support plates are provided, installed on both ends of the base plate. The lower template is installed on the support plates. The lower mold core and the U-shaped surrounding block are installed on the upper side of the lower template, with the U-shaped surrounding block arranged around the lower mold core. The upper template is located above the lower template, and the upper mold core is installed on the lower side of the upper template. The upper mold core and the lower mold core... The upper mold core consists of a steel body with a nickel plating layer on its lower side. Multiple parallel first "∧" shaped protrusions are spaced apart on the upper side of the lower mold core, and a first trapezoidal groove is formed between adjacent first "∧" shaped protrusions. The first "∧" shaped protrusions correspond to and match the first "V" shaped groove of the light guide plate. The upper mold core includes a steel body with a nickel plating layer on its lower side. Multiple parallel second "∧" shaped protrusions are spaced apart on the lower side of the nickel plating layer, and a second trapezoidal groove is formed between adjacent second "∧" shaped protrusions. The second "∧" shaped protrusions correspond to and match the second "V" shaped groove of the light guide plate.
[0007] Preferably, the lower template has a lower mold core mounting cavity on its upper side, and the lower mold core and the "U"-shaped surrounding block are installed together in the lower mold core mounting cavity; the upper template has an upper mold core mounting cavity on its lower side, and the upper mold core is installed in the upper mold core mounting cavity.
[0008] Preferably, the upper template and the upper mold core are respectively provided with injection holes, and the "mouth"-shaped surrounding block is provided with an injection channel between the upper mold core. One end of the injection channel is connected to the injection hole of the upper mold core, and the other end of the injection channel is connected to the cavity.
[0009] Preferably, the light guide plate injection mold further includes an ejector plate, an ejector pin, and a spring. The ejector plate is vertically mounted between two support plates. The ejector pin is vertically mounted on the ejector plate. The upper end of the ejector pin moves upward through the lower mold plate and extends into the glue channel. The spring is mounted between the lower mold plate and the ejector plate.
[0010] Preferably, four upward-extending guide rods are installed at the four corners of the lower template, and four guide sleeves are installed at the four corners of the upper template. When the injection mold is closed, the guide rods are inserted upward into the corresponding guide sleeves.
[0011] The technical effects of this utility model are: (1) Because this utility model has multiple parallel first "V" shaped grooves spaced on the light-emitting surface of the light guide plate, the first "V" shaped grooves are parallel to the light-incident surface, the depth of the first "V" shaped grooves is 0.6 to 0.8 µm, and the cross-sectional angle of the first "V" shaped grooves is 115 to 125 degrees, the light that should be directed to the side or far away can be reflected back into the plate by the first "V" shaped grooves. After secondary reflection, it is emitted vertically from the plane area between the grooves. The light-emitting surface is composed of the groove wall (non-light-emitting area) and the plane between the grooves (main light-emitting area), forming a very (1) High visual brightness and good visual effect; (2) In this utility model, the distance between adjacent first "V" shaped grooves gradually narrows from the end of the light-emitting surface near the light-incident surface to the end of the light-emitting surface away from the light-incident surface. At the end of the light-emitting surface near the light-incident surface, the distance between adjacent first "V" shaped grooves is 180-220µm, and at the end of the light-emitting surface away from the light-incident surface, the distance between adjacent first "V" shaped grooves is 85-95µm. This structural feature can avoid excessive light consumption at the end near the light-incident surface, prevent the formation of excessively bright spots, and at the same time allow enough light to continue to penetrate and propagate. To the far end of the light guide plate, the first "V" shaped grooves at the far end take in more light, thereby improving the uniformity of the light guide plate; (3) In this utility model, multiple parallel second "V" shaped grooves are evenly spaced on the microstructure surface of the light guide plate. The second "V" shaped grooves are perpendicular to the light incident surface. The depth of the second "V" shaped grooves is 2.5 to 3.5 µm, the cross-sectional angle of the second "V" shaped grooves is 75 to 85 degrees, and the distance between adjacent second "V" shaped grooves is 35 to 45 µm. Therefore, the inclined surface of the second "V" shaped groove forms a small mirror surface. When light is incident on this inclined surface at a very large angle, This process involves specular reflection, directly reflecting light onto the side of the light guide plate and forcing it to exit. It exhibits extremely strong light-capturing and redirecting capabilities, thereby improving the brightness and uniformity of the light guide plate. It is suitable for light guide plates thicker than 5mm and eliminates the need for traditional dot-matrix microstructures, ensuring the light guide plate is opaque. Based on these technical advantages, this new type of light guide plate, even without the need for diffusion and brightness enhancement films, still maintains high brightness, good brightness uniformity, and opacity. Eliminating the diffusion and brightness enhancement films reduces assembly steps, significantly improves assembly efficiency, increases production volume, and lowers costs. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the upper side structure of the light guide plate.
[0013] Figure 2 for Figure 1 The diagram shows a bottom view of the light guide plate.
[0014] Figure 3 This is a schematic diagram of the lower side structure of the light guide plate.
[0015] Figure 4 for Figure 3 The diagram shows the left-side view of the light guide plate.
[0016] Figure 5 This is a structural diagram of the injection mold for the light guide plate.
[0017] Figure 6 This is a longitudinal sectional view of the injection mold for the light guide plate.
[0018] Figure 7 This is a first-view dispersion structure diagram of the light guide plate injection mold.
[0019] Figure 8 This is a second-view dispersion structure diagram of the light guide plate injection mold.
[0020] Figure 9 This is a schematic diagram of the cross-sectional structure of the lower mold core and a magnified view of a portion thereof.
[0021] Figure 10 This is a schematic diagram of the cross-sectional structure of the upper mold core and a magnified view of a portion thereof. Detailed Implementation
[0022] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings. Example 1
[0023] like Figures 1-4As shown, Embodiment 1 is a light guide plate 100 that eliminates the need for a diffusion film and a brightness enhancement film. The upper side of the light guide plate 100 is the light emitting surface 1, the lower side is the microstructure surface 2, and one end of the light guide plate 100 is the light incident surface 3. The light incident surface 3 is perpendicular to both the light emitting surface 1 and the microstructure surface 2. Multiple parallel first "V"-shaped grooves 101 are spaced apart on the light emitting surface 1 of the light guide plate 100. The first "V"-shaped grooves 101 are parallel to the light incident surface 3. The depth D1 of the first "V"-shaped grooves 101 is 0.6–0.8 µm, preferably 0.7 µm, and the included angle R1 of the cross-section of the first "V"-shaped grooves 101 is 115–125 degrees, preferably 120 degrees. From the end of the light emitting surface 1 closest to the light incident surface 3 to the end of the light emitting surface 1 furthest from the light incident surface 3, adjacent first "V"-shaped grooves 101... The spacing between them gradually narrows; at the end of the light-emitting surface 1 near the light-incident surface 3, the spacing L1 between adjacent first "V" shaped grooves 101 is 180-220µm, preferably 200µm; at the end of the light-emitting surface 1 away from the light-incident surface 3, the spacing L2 between adjacent first "V" shaped grooves 101 is 85-95µm, preferably 90µm; multiple parallel second "V" shaped grooves 102 are evenly spaced on the microstructure surface 2 of the light guide plate 100, the second "V" shaped grooves 102 are perpendicular to the light-incident surface 3, the depth D2 of the second "V" shaped grooves 102 is 2.5-3.5µm, preferably 3µm, the included angle R2 of the cross section of the second "V" shaped grooves 102 is 75-85 degrees, preferably 80 degrees, and the spacing L3 between adjacent second "V" shaped grooves 102 is 35-45µm, preferably 40µm.
[0024] This invention features multiple parallel first "V"-shaped grooves 101 spaced apart on the light-emitting surface 1 of the light guide plate 100. These first "V"-shaped grooves 101 are parallel to the light-incident surface 3, with a depth of 0.6–0.8 µm and a cross-sectional angle of 115–125 degrees. Therefore, light rays that would otherwise be directed to the side or a distance can be reflected back into the plate by the first "V"-shaped grooves 101. After secondary reflection, the light rays are emitted perpendicularly from the plane area between the grooves. The light-emitting surface 1 consists of the groove walls (non-light-emitting area) and the plane between the grooves (main light-emitting area), resulting in very high visual brightness and a superior visual effect. Okay; In this utility model, the spacing between adjacent first "V" shaped grooves 101 gradually narrows from the end of the light-emitting surface 1 near the light-incident surface 3 to the end of the light-emitting surface 1 away from the light-incident surface 3. At the end of the light-emitting surface 1 near the light-incident surface 3, the spacing between adjacent first "V" shaped grooves 101 is 180-220µm, and at the end of the light-emitting surface 1 away from the light-incident surface 3, the spacing between adjacent first "V" shaped grooves 101 is 85-95µm. This structural feature can avoid excessive light consumption at the end near the light-incident surface 3, preventing the formation of excessively bright spots, while allowing enough light to continue to penetrate and be transmitted to the far end of the light guide plate 100, so that the far end... The first "V"-shaped groove 101, which has more ends, captures light, thereby improving the uniformity of the light guide plate 100. In this invention, multiple parallel second "V"-shaped grooves 102 are evenly spaced on the microstructure surface 2 of the light guide plate 100. The second "V"-shaped grooves 102 are perpendicular to the light incident surface 3, with a depth of 2.5–3.5 µm, a cross-sectional angle of 75–85 degrees, and a spacing of 35–45 µm between adjacent second "V"-shaped grooves 102. Therefore, the inclined surface of the second "V"-shaped groove 102 forms a tiny mirror surface. When light is incident on this inclined surface at a very large angle,… Specular reflection occurs, directly reflecting light onto the upper side of the light guide plate 100 and forcing it to exit. This results in extremely strong light capture and redirection capabilities, thereby improving the brightness and light uniformity of the light guide plate 100. It is suitable for light guide plates 100 with a thickness of 5mm or more, and it abandons the traditional dot-matrix microstructure, making the light guide plate 100 opaque. Based on the above technical effects, the light guide plate 100 of this utility model can still ensure high brightness and good brightness uniformity and opacity even after eliminating the diffusion film and brightness enhancement film. Eliminating the diffusion film and brightness enhancement film reduces assembly steps, greatly improves assembly efficiency, increases production output, and reduces costs. Example 2
[0025] like Figures 5-10As shown, Embodiment 2 is a light guide plate injection mold used for injection molding the light guide plate 100. It includes a base plate 4, a support plate 5, a lower template 6, a lower mold core 7, a U-shaped surrounding block 8, an upper template 9, and an upper mold core 10. Two support plates 5 are provided, mounted on both ends of the base plate 4. The lower template 6 is mounted on the support plate 5. The lower mold core 7 and the U-shaped surrounding block 8 are mounted on the upper side of the lower template 6, with the U-shaped surrounding block 8 arranged around the lower mold core 7. The upper template 9 is positioned above the lower template 6, and the upper mold core 10 is mounted on the lower side of the upper template 9. The upper mold core 10, the lower mold core 7, and the U-shaped surrounding block 8 mutually enclose each other for injection molding. The light guide plate 100 has a cavity 200; the upper side of the lower mold core 7 is provided with multiple parallel first "∧" shaped protrusions 71, and a first trapezoidal groove 72 is provided between adjacent first "∧" shaped protrusions 71. The first "∧" shaped protrusions 71 correspond to and match the first "V" shaped groove 101 of the light guide plate 100; the upper mold core 10 includes a steel body 11, the lower side of the steel body 11 is plated with a nickel layer 12, and the lower side of the nickel layer 12 is provided with multiple parallel second "∧" shaped protrusions 13, and a second trapezoidal groove 14 is provided between adjacent second "∧" shaped protrusions 13. The second "∧" shaped protrusions 13 correspond to and match the second "V" shaped groove 102 of the light guide plate 100. The nickel layer 12 used in this utility model has good ductility, high strength, and strong corrosion resistance. The microstructure processed on its surface is smooth, consistent, and can be made deep.
[0026] like Figures 6-8 As shown, the lower template 6 has a lower mold core mounting cavity 61 on its upper side, and the lower mold core 7 and the "U"-shaped surrounding block 8 are installed together within the lower mold core mounting cavity 61; the upper template 9 has an upper mold core mounting cavity 91 on its lower side, and the upper mold core 10 is installed within the upper mold core mounting cavity 91. When different types of light guide plates need to be formed, only the lower mold core 7, the "U"-shaped surrounding block 8, and the upper mold core 10 of different specifications need to be replaced; other parts of the mold do not need to be replaced.
[0027] like Figures 5-8 As shown, the upper template 9 and the upper mold core 10 are respectively provided with injection holes 15. The "mouth"-shaped surrounding block 8 and the upper mold core 10 are provided with an injection channel 17. One end of the injection channel 17 is connected to the injection hole 15 of the upper mold core 10, and the other end of the injection channel 17 is connected to the cavity 200.
[0028] like Figures 5-8As shown, the light guide plate injection mold also includes an ejector plate 18, an ejector pin 19, and a spring 20. The ejector plate 18 is vertically mounted between two support plates 5. The ejector pin is vertically mounted on the ejector plate 18. The upper end of the ejector pin moves upward through the lower template 6 and extends toward the glue inlet channel 17. The spring 20 is mounted between the lower template 6 and the ejector plate 18.
[0029] like Figures 5-8 As shown, four upward-extending guide rods 21 are installed at the four corners of the lower template 6, and four guide sleeves 22 are installed at the four corners of the upper template 9. When the injection mold is closed, the guide rods 21 are inserted upward into the corresponding guide sleeves 22.
[0030] The above description is merely a preferred embodiment of this utility model. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.
Claims
1. A light guide plate that eliminates the need for a diffusion film and a brightness enhancement film, wherein the upper side of the light guide plate is a light emitting surface, the lower side of the light guide plate is a microstructure surface, and one end of the light guide plate is a light incident surface, wherein the light incident surface is perpendicular to both the light emitting surface and the microstructure surface; characterized in that: The light guide plate has multiple parallel first "V"-shaped grooves spaced apart on its light-emitting surface. These first "V"-shaped grooves are parallel to the light-incident surface, with a depth of 0.6–0.8 µm and a cross-sectional angle of 115–125 degrees. The spacing between adjacent first "V"-shaped grooves gradually narrows from the end of the light-emitting surface closest to the light-incident surface to the end furthest from the light-incident surface. At the end of the light-emitting surface closest to the light-incident surface, the spacing between adjacent first "V"-shaped grooves... The distance between adjacent first "V" shaped grooves is 180–220 µm; at the end of the light-emitting surface away from the light-incident surface, the distance between adjacent first "V" shaped grooves is 85–95 µm; multiple parallel second "V" shaped grooves are evenly spaced on the microstructure surface of the light guide plate, the second "V" shaped grooves are perpendicular to the light-incident surface, the depth of the second "V" shaped grooves is 2.5–3.5 µm, the included angle of the cross section of the second "V" shaped grooves is 75–85 degrees, and the distance between adjacent second "V" shaped grooves is 35–45 µm.
2. The light guide plate according to claim 1, which eliminates the need for a diffusion film and a brightness enhancement film, is characterized in that: The first "V" shaped groove has a depth of 0.7µm and a cross-sectional angle of 120 degrees. At the end of the light-emitting surface closer to the light-incident surface, the distance between adjacent first "V" shaped grooves is 200µm; at the end of the light-emitting surface farther from the light-incident surface, the distance between adjacent first "V" shaped grooves is 90µm. The second "V" shaped groove has a depth of 3µm and a cross-sectional angle of 80 degrees. The distance between adjacent second "V" shaped grooves is 40µm.
3. A light guide plate injection mold for injection molding the light guide plate as described in claim 1 or 2, characterized in that: The system includes a base plate, a support plate, a lower template, a lower mold core, a U-shaped surrounding block, an upper template, and an upper mold core. Two support plates are provided, mounted on both ends of the base plate. The lower template is mounted on the support plates. The lower mold core and the U-shaped surrounding block are mounted on the upper side of the lower template, with the U-shaped surrounding block arranged around the lower mold core. The upper template is positioned above the lower template, and the upper mold core is mounted on the lower side of the upper template. The upper mold core, lower mold core, and U-shaped surrounding block together form a cavity for injection molding a light guide plate. The upper part of the lower mold core is provided with multiple parallel first "∧" shaped protrusions at intervals, and a first trapezoidal groove is provided between adjacent first "∧" shaped protrusions. The first "∧" shaped protrusions correspond to and match the first "V" shaped groove of the light guide plate. The upper mold core includes a steel body, and the lower part of the steel body is plated with a nickel layer. The lower part of the nickel layer is provided with multiple parallel second "∧" shaped protrusions at intervals, and a second trapezoidal groove is provided between adjacent second "∧" shaped protrusions. The second "∧" shaped protrusions correspond to and match the second "V" shaped groove of the light guide plate.
4. The light guide plate injection mold according to claim 3, characterized in that: The lower template has a lower mold core mounting cavity on its upper side, and the lower mold core and the "U"-shaped surrounding block are installed together in the lower mold core mounting cavity; the upper template has an upper mold core mounting cavity on its lower side, and the upper mold core is installed in the upper mold core mounting cavity.
5. The light guide plate injection mold according to claim 3, characterized in that: The upper template and the upper mold core are respectively provided with injection holes. The "mouth"-shaped surrounding block is provided with an injection channel between it and the upper mold core. One end of the injection channel is connected to the injection hole of the upper mold core, and the other end of the injection channel is connected to the cavity.
6. The light guide plate injection mold according to claim 5, characterized in that: It also includes an ejector plate, an ejector pin, and a spring. The ejector plate is vertically mounted between two support plates. The ejector pin is vertically mounted on the ejector plate. The upper end of the ejector pin moves upward through the lower template and extends into the glue inlet channel. The spring is mounted between the lower template and the ejector plate.
7. The light guide plate injection mold according to claim 3, characterized in that: Four upward-extending guide rods are installed at the four corners of the lower template, and four guide sleeves are installed at the four corners of the upper template. When the injection mold is closed, the guide rods are inserted upward into the corresponding guide sleeves.