Ultra-thick lens injection mold

Abstract

The utility model provides an injection mold for a super-thick lens. The injection mold comprises a mold shell, an upper mold base and a lower mold base are arranged in the mold shell, the upper mold base and the lower mold base are matched with an adjustable injection molding upper mold and an adjustable injection molding lower mold respectively, an ejection device is arranged at the bottom of the adjustable injection molding lower mold, and the adjustable injection molding upper mold and the adjustable injection molding lower mold are matched to form an injection molding cavity. An injection molding opening is formed in the middle of the side edge of the injection molding cavity, a water gap groove is further formed in the outer side of the injection molding opening, the adjustable injection molding lower mold and the lower mold base are matched to form an injection molding groove, and a first insert used for injection molding of a compensating mirror and a second insert used for injection molding of an assembly opening are arranged in the injection molding groove. The utility model relates to the field of injection molds.

Description

Technical Field

[0001] This utility model relates to the field of injection molds, and in particular to an ultra-thick lens injection mold. Background Technology

[0002] As the market develops, there are now stricter requirements for the production efficiency and quality of injection-molded products. Previously, injection-molded lenses were 2-3mm thick; now, based on market demand, there is a need to produce ultra-thick lenses exceeding 17mm in thickness, with visual direction compensation required. For ultra-thick lenses, the optical parameter simulation requirements are high, and the precision requirements are also high. If injection molding is performed using older technology, the molded product will shrink and deform due to thermal expansion and contraction, resulting in a loss of focus and the inability to achieve proper focusing.

[0003] Therefore, it is essential to develop an ultra-thick lens injection mold. This can not only solve the problem of shrinkage and deformation of ultra-thick lenses during the production process, but also ensure the product quality of ultra-thick lenses and greatly improve the output rate of ultra-thick lens injection molded products. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model proposes an ultra-thick lens injection mold. The aim is to solve the problem of shrinkage and deformation during the production of ultra-thick lenses in injection molding, thereby improving product quality.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an ultra-thick lens injection mold, comprising a mold shell, an upper mold base and a lower mold base are provided inside the mold shell, the upper mold base and the lower mold base are respectively fitted with an adjustable injection upper mold and an adjustable injection lower mold, an ejector device is provided at the bottom of the adjustable injection lower mold, the adjustable injection upper mold and the adjustable injection lower mold cooperate to form an injection cavity, an injection port is provided in the middle of the side of the injection cavity, a sprue groove is also provided on the outside of the injection port, the adjustable injection lower mold and the lower mold base cooperate to form an injection groove, an insert for injection molding a compensating lens and an insert for injection molding an assembly port are provided in the injection groove.

[0006] Based on the above, the injection port is located in the middle of the side plate of the injection cavity, enabling uniform injection during the injection process. After injection is completed, the sprue solidifies in the sprue groove. The upper mold base is removed, and the adjustable lower injection mold, along with the product, is ejected by the ejection device. Then, a robotic arm is used to grip the sprue and remove the product, avoiding direct contact with the product and leaving marks that could affect its quality. Furthermore, insert one corresponds to the compensating mirror position on the product and is used for compensating mirrors in the injection-molded product. Insert two is used for the assembly port of the injection-molded product. There is a fitting clearance between insert one, insert two, and the adjustable lower injection mold, allowing for venting and pressure relief to prevent air bubbles and shrinkage deformation.

[0007] Furthermore, both the upper mold base and the lower mold base are equipped with cooling pipes.

[0008] Based on the above, cooling is achieved through the cooling pipe during the injection molding process, which accelerates the cooling and shaping of the product.

[0009] Furthermore, the adjustable injection mold has an aspherical surface, and the four ends of the adjustable injection mold have chamfers.

[0010] Based on the above, the chamfer is used to disperse the stress at the four corners of the product, avoid stress concentration, and improve the service life of the product.

[0011] Furthermore, a lower gasket is provided between the ejector device and the bottom surface of the adjustable injection mold, and an upper gasket is provided at the upper end of the adjustable injection mold.

[0012] Based on the above, the product requires high precision in thickness. By using the lower shim in conjunction with the ejection device, the height of the adjustable injection mold can be adjusted, thereby adjusting the optimal height of the adjustable injection mold according to the requirements. At the same time, the height position of the aspherical surface can be adjusted by using the upper shim.

[0013] Furthermore, the lower end of the ejector device is provided with a lifting plate, and the lower end of the ejector device is fixedly engaged with the upper surface of the lifting plate. The lifting plate is also provided with a number of guide posts, and pressure springs are provided on the guide posts.

[0014] Based on the above, the lifting plate is moved upward by an external device, and the ejection device pushes the adjustable injection mold out under the push of the lifting plate.

[0015] Furthermore, the mold shell 1 includes an upper mold shell and a lower mold shell. The lower mold shell is provided with positioning male blocks around its perimeter, and the upper mold shell is provided with positioning female blocks that cooperate with the positioning male blocks around its perimeter.

[0016] Based on the above, the positioning male block and the positioning female block can be used to quickly and accurately position the adjustable upper injection mold and the adjustable lower injection mold, ensuring processing accuracy and improving processing efficiency.

[0017] Furthermore, the ejection device consists of an ejection rod and an ejection panel.

[0018] Based on the above, the large contact area between the ejector panel and the base plate makes ejecting the product easier.

[0019] Furthermore, a pressure plate is provided at the upper end of the upper mold shell, and an injection tube is provided on the pressure plate, which is connected to the injection port.

[0020] Based on the above, the injection tube is used to inject molten adhesive into the injection cavity.

[0021] To more clearly illustrate the above-mentioned features of this utility model and the objectives it aims to achieve, the following description, in conjunction with the accompanying drawings and specific embodiments, will further explain this utility model. Attached Figure Description

[0022] Figure 1 : This is a perspective view of the present invention;

[0023] Figure 2 This is a perspective view of the present invention excluding the mold shell;

[0024] Figure 3 : This is a schematic diagram of the upper and lower mold bases;

[0025] Figure 4 : A sectional view of the assembly of the upper and lower mold bases;

[0026] Figure 5 : This is a schematic diagram of the upper view structure of the lower mold base;

[0027] Figure 6 : This is a schematic diagram of the lower mold base from a lower perspective.

[0028] Figure 7 This is a structural diagram of the adjustable upper injection mold, the adjustable lower injection mold, and the product.

[0029] Figure 8 : A schematic diagram of the adjustable injection mold structure;

[0030] Figure 9 : Schematic diagram a of the product structure with a sprue;

[0031] Figure 10 : Schematic diagram of the product structure with a sprue (b).

[0032] Explanation of reference numerals: 1. Mold shell; 2. Upper mold base; 3. Lower mold base; 4. Adjustable upper injection mold; 5. Adjustable lower injection mold; 6. Ejector device; 7. Injection cavity; 8. Injection port; 9. Sprue groove; 10. Cooling pipe; 11. Injection groove; 12. Insert 1; 13. Insert 2; 14. Aspherical surface; 15. Chamfer; 16. Lower gasket; 17. Upper gasket; 18. Elevating plate; 19. Guide pillar; 20. Pressure spring; 21. Upper mold shell; 22. Lower mold shell; 23a. Positioning male block; 23b. Positioning female block; 24. Ejector rod; 25. Ejector panel; 26. Pressure plate; 27. Injection tube; 28. Product. Detailed Implementation

[0033] like Figures 1 to 10As shown, an ultra-thick lens injection mold includes a mold shell 1. An upper mold base 2 and a lower mold base 3 are disposed inside the mold shell 1. An adjustable upper injection mold 4 and an adjustable lower injection mold 5 are respectively fitted to the upper mold base 2 and the lower mold base 3. An ejector device 6 is provided at the bottom of the adjustable lower injection mold 5. The adjustable upper injection mold 4 and the adjustable lower injection mold 5 cooperate to form an injection cavity 7. An injection port 8 is provided in the middle of the side of the injection cavity 7. A sprue groove 9 is also provided on the outer side of the injection port 8. The adjustable lower injection mold 5 and the lower mold base 3 cooperate to form an injection groove 11. An insert 12 for injection molding a compensating lens and an insert 2 13 for injection molding an assembly port are disposed within the injection groove 11. The insert 12 and the insert 2 13 are fixedly installed on the adjustable lower injection mold 5. The first insert 12 corresponds to the position of the compensating mirror on the product 28, and the second insert 13 is used for the assembly port of the injection molded product 28. Both the upper mold base 2 and the lower mold base 3 are equipped with cooling pipes 10. During production, the product 28 is injected through the injection port 8, and simultaneously cooled by the cooling pipes 10.

[0034] There is a fitting clearance between the first insert 12, the second insert 13, and the adjustable injection mold 5, which allows for venting and pressure relief, preventing air bubbles and shrinkage deformation. During injection molding, cooling is achieved through the cooling pipe 10, accelerating the cooling and shaping of the product 28. After injection molding and cooling, the sprue in the sprue groove 9 solidifies. The upper mold base 2 is removed, and the adjustable injection mold 5, along with the product 28, is ejected via the ejection device 6. Then, a robotic arm grips the sprue and removes the product 28, avoiding direct contact with the product and leaving marks that could affect its quality.

[0035] Preferably, the adjustable injection mold 4 is provided with an aspherical surface 14, and the four ends of the adjustable injection mold 4 are provided with chamfers 15. The chamfers 15 are used to disperse the stress at the four corners of the product 28, avoid stress concentration, and improve the service life of the product.

[0036] Preferably, a lower shim 16 is further provided between the ejector device 6 and the bottom surface of the adjustable lower injection mold 5, and an upper shim 17 is provided at the upper end of the adjustable upper injection mold 4. The product 28 requires high precision in thickness. By using the lower shim 16 in conjunction with the ejector device 6, the height of the adjustable lower injection mold 5 can be adjusted, thereby allowing for optimal height adjustment according to requirements. Simultaneously, the height position of the aspherical surface 14 can be adjusted via the upper shim 17.

[0037] Preferably, the lower end of the ejector device 6 is provided with a lifting plate 18, and the lower end of the ejector device 6 is fixedly engaged with the upper surface of the lifting plate 18. The lifting plate 18 is also provided with a plurality of guide posts 19, and pressure springs 20 are provided on the guide posts 19. When the lifting plate 18 is moved upward by an external device, the ejector device 6 pushes out the adjustable injection mold 5 under the push of the lifting plate 18. After the external device returns to its original position, the adjustable injection mold 5 resets under the elastic force of the pressure springs 20.

[0038] Preferably, the mold housing 1 includes an upper mold housing 21 and a lower mold housing 22. Positioning male blocks 23a are provided around the perimeter of the lower mold housing 22, and positioning female blocks 23b that cooperate with the positioning male blocks 23a are provided around the perimeter of the upper mold housing 21. Through the cooperation of the positioning male blocks 23a and the positioning female blocks 23b, the adjustable injection upper mold 4 and the adjustable injection lower mold 5 can be quickly and accurately positioned, ensuring processing accuracy and improving processing efficiency.

[0039] Preferably, the ejection device 6 consists of an ejection rod 24 and an ejection panel 25. The ejection panel 25 has a large contact area with the base plate, making it easier to eject the product.

[0040] The specific implementation of this embodiment is as follows: During injection molding, the upper mold housing 21 and the lower mold housing 22 are first matched by the positioning male block 23a and the positioning female block 23b to achieve rapid and precise positioning of the adjustable upper injection mold 4 and the adjustable lower injection mold 5. Then, the molten plastic is introduced into the injection cavity 7 through the injection tube 27 for molding. When the injection is completed, the cooling pipe 10 starts to circulate coolant to cool the mold and allow the product to cool and solidify. After cooling, the upper mold base 2 is removed, and the adjustable lower injection mold 5 is ejected along with the product through the ejection device 6. Then, the product is removed and placed by a robotic arm gripping the sprue, avoiding direct contact with the product 28 and leaving marks.

[0041] The above description is only the optimal solution embodiment of this utility model and is not intended to limit this utility model. Various modifications or substitutions made by those skilled in the art to this utility model without departing from the essence and protection scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A thick lens injection mold, comprising a mold shell (1), characterized in that, The mold shell (1) is provided with an upper mold base (2) and a lower mold base (3). The upper mold base (2) and the lower mold base (3) are respectively fitted with an adjustable injection upper mold (4) and an adjustable injection lower mold (5). The bottom of the adjustable injection lower mold (5) is provided with an ejector device (6). The adjustable injection upper mold (4) and the adjustable injection lower mold (5) cooperate to form an injection cavity (7). An injection port (8) is provided in the middle of the side of the injection cavity (7). A sprue groove (9) is also provided on the outside of the injection port (8). The adjustable injection lower mold (5) and the lower mold base (3) cooperate to form an injection groove (11). An insert one (12) for injection compensation mirror and an insert two (13) for injection assembly port are provided in the injection groove (11).

2. The ultra-thick lens injection mold according to claim 1, characterized in that: Cooling pipes (10) are provided inside both the upper mold base (2) and the lower mold base (3).

3. The ultra-thick lens injection mold according to claim 1, characterized in that: The adjustable injection mold (4) is provided with an aspherical surface (14), and the four ends of the adjustable injection mold (4) are provided with chamfers (15).

4. The ultra-thick lens injection mold according to claim 1, characterized in that: A lower gasket (16) is provided between the ejector device (6) and the bottom surface of the adjustable injection mold (5), and an upper gasket (17) is provided at the upper end of the adjustable injection mold (4).

5. The ultra-thick lens injection mold according to claim 1, characterized in that: The lower end of the ejection device (6) is provided with a lifting plate (18), and the lower end of the ejection device (6) is fixedly engaged with the upper surface of the lifting plate (18). The lifting plate (18) is also provided with a number of guide posts (19), and pressure springs (20) are provided on the guide posts (19).

6. The ultra-thick lens injection mold according to claim 1, characterized in that: The mold shell (1) includes an upper mold shell (21) and a lower mold shell (22). The lower mold shell (22) is provided with a positioning male block (23a) around its perimeter, and the upper mold shell (21) is provided with a positioning female block (23b) that cooperates with the positioning male block (23a) around its perimeter.

7. The ultra-thick lens injection mold according to claim 1, characterized in that: The ejection device (6) consists of an ejection rod (24) and an ejection panel (25).

8. The ultra-thick lens injection mold according to claim 6, characterized in that: The upper end of the upper mold shell (21) is provided with a pressure plate (26), and an injection tube (27) is provided on the pressure plate (26). The injection tube (27) is connected to the injection port (8).

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