Lens mold

Abstract

The utility model relates to a lens mould, an upper mould assembly comprises an upper panel and an upper mould plate below the upper panel, a lower mould assembly comprises a lower mould plate and a first bottom plate below the lower mould plate, and the upper mould plate and the lower mould plate can be tightly arranged in a gapless manner under the action of an injection molding machine and a mould locking buckle; a spring is arranged between the upper panel and the upper shaping plate, and the spring is arranged in a first groove in the lower surface of the upper panel; a plurality of guide columns are fixed on the upper panel; any guide column sequentially penetrates through the upper shaping plate and the lower shaping plate; a first gap is formed between the guide column and the first bottom plate; according to the utility model, when the upper template is separated from the upper panel, the first mold is driven to be separated from the to-be-formed lens, so that the purpose of preferential release is achieved, air enters the lens forming cavity to achieve a vacuum breaking state, the problem of reverse release caused by the fact that the to-be-formed lens is attached to the first mold is avoided, and therefore, the PV surface precision and the release stability are improved, and the production efficiency is improved. The lens quality is ensured, and the market competitiveness of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lens production, in particular to a lens mold. Background Art

[0002] In industrial production, various molds are used to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. Injection molds are a tool for producing plastic products, and are also tools that give plastic products complete combination and precise size. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by the injection molding machine, and after cooling and solidification, the molded product is obtained.

[0003] Optical lenses can be divided into plastic lenses and glass lenses. Plastic lenses are obtained by injection molding. In the prior art, optical lenses are made by injection molding. After the mold is closed, molten plastic is injected into the molding cavity by an injection molding machine. After sufficient molten plastic fills the molding cavity, the optical lens is obtained by cooling and molding.

[0004] As the demand for precision specifications of optical plastic lenses continues to increase, the shapes of lenses are becoming more and more irregular. Conventional optical mold structures are gradually unable to meet the needs of some plastic lenses with more complex shapes and high precision. The phenomenon of abnormal mold opening quality induced by mold structure is becoming more and more obvious. The "release process problem that violates the design requirements" during the release process of plastic lenses due to vacuum adsorption is one of the abnormal phenomena. If the reverse release problem occurs during the mold release process, it will have a fatal impact on the product PV surface accuracy and production stability. Utility Model Content

[0005] In order to solve the technical problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a lens mold, so that the separation of the upper mold plate and the upper panel will precede the separation of the upper mold plate and the lower mold plate, avoiding the problem of vacuum adsorption and reverse separation pulling caused by the lens to be formed being attached to the first mold, thereby improving the PV surface accuracy and release stability.

[0006] To achieve the above-mentioned utility model object, the technical solution of the utility model is: a lens mold, comprising an upper mold assembly and a lower mold assembly arranged below the upper mold assembly, the upper mold assembly comprising an upper panel and an upper mold plate below the upper panel, the lower mold assembly comprising a lower mold plate and a first bottom plate below the lower mold plate, the upper mold plate and the lower mold plate can be closely arranged without gap under the action of an injection molding machine and a locking buckle;

[0007] A first mold penetrating the upper mold plate is fixed on the upper plate, and a second mold penetrating the lower mold plate is fixed at a corresponding position on the first bottom plate. The upper mold plate is tightly attached to the lower mold plate, and a lens molding cavity is formed between the first mold and the second mold;

[0008] A spring is arranged between the upper panel and the upper mold plate, and the spring is arranged in a first groove on the lower surface of the upper panel;

[0009] A plurality of guide pillars are fixed on the upper plate, and any of the guide pillars sequentially passes through the upper plate and the lower plate and has a first gap with the first bottom plate;

[0010] The upper mold plate is provided with a first through hole for the first mold to pass through, and a cylindrical bushing adapted to the first mold is provided in the first through hole;

[0011] The diameter of the cross section of the cylindrical bushing at any position is slightly smaller than the diameter of the lens to be formed.

[0012] According to a technical solution of the utility model, the guide column passes through from the upper surface of the upper panel to the lower surface and is fixed on the upper panel, and an oil groove is provided on the guide column.

[0013] According to a technical solution of the utility model, the upper panel is provided with a limit screw, the limit screw comprises an end and a columnar portion, the bottom end of the columnar portion is provided with a thread, and the columnar portion between the thread and the end is smoothly arranged;

[0014] The limit screw passes through the upper mold plate from bottom to top and is fixed to the upper panel through the thread. The end head is located in the second groove of the upper mold plate, and a second gap exists between the lower surface of the end head and the bottom surface of the second groove.

[0015] According to a technical solution of the utility model, the spring sleeve is arranged on the outside of the limit screw.

[0016] According to a technical solution of the utility model, at least one pair of the locking buckles are fixedly arranged on the side of the upper mold plate and the side of the lower mold plate, and the locking buckles are two magnets with different polarities respectively arranged on the upper mold plate and the lower mold plate.

[0017] According to a technical solution of the utility model, a material injection port is provided at the center of the upper panel, a sprue bushing is provided at the material injection port, a tapered hole with a wide top and a narrow bottom is provided at a position on the upper mold plate corresponding to the sprue bushing, and the sprue bushing is inserted into the tapered hole;

[0018] The upper mold plate and the lower mold plate are closely attached to form a feed channel, and the gate sleeve is connected with the lens molding cavity through the feed channel.

[0019] According to a technical solution of the utility model, a plurality of the first molds are fixedly arranged on the lower surface of the upper panel in a circular array around the gate sleeve.

[0020] According to a technical solution of the utility model, internal cooling water channels are provided in both the upper mold plate and the lower mold plate;

[0021] The upper surface of the upper mold plate and the lower surface of the lower mold plate are both provided with surface cooling water channels, and the surface cooling water channels are in a circular ring shape.

[0022] According to a technical solution of the utility model, a cover plate is embedded and installed in the first groove on the lower surface of the upper panel, and the size of the cover plate is larger than the size of the annular surface cooling water channel.

[0023] According to a technical solution of the utility model, a first precision positioning column is fixed on the lower surface of the upper panel, and the first precision positioning column passes through the upper mold plate and is adapted to be installed with a second precision positioning column fixed on the first bottom plate.

[0024] According to a technical solution of the utility model, one end of the first precision positioning column is fixed to the upper panel through a pressing block, and the other end is configured as a groove structure;

[0025] The second precision positioning column passes through the lower mold plate to form a boss structure matched with the groove structure.

[0026] According to a technical solution of the utility model, the groove structure is a conical groove, and the boss structure is a truncated cone.

[0027] According to a technical solution of the utility model, the first precision positioning column is fixed to the upper panel by a pressing block and screws, and the second precision positioning column is fixed to the first bottom plate by screws;

[0028] Adjustment gaskets are arranged between the first precision positioning column and the pressing block, and between the second precision positioning column and the first bottom plate.

[0029] According to a technical solution of the utility model, cushion blocks are arranged between the first mold and the upper panel, and between the second mold and the first bottom plate.

[0030] According to a technical solution of the utility model, it also includes a second bottom plate, and the lower mold plate, the first bottom plate and the second bottom plate are connected and fixed in sequence by screws.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] Through the design scheme of the utility model, during the process of mold opening and demolding, the upper panel and the upper mold plate are separated due to the pre-stressing support force of the spring. When the upper panel and the upper mold plate are separated, the locking action of the locking buckle between the upper mold plate and the lower mold plate and the pre-stressing load force of the spring between the upper mold plate and the upper panel restrict the upper mold plate and the lower mold plate from being separated in advance, so that the separation of the upper mold plate and the upper panel precedes the separation of the upper mold plate and the lower mold plate. Based on the fixed relationship between the first mold and the upper panel, the second mold and the first bottom plate, and the pressure effect of the cylindrical bushing on the lens to be formed, when the upper mold plate and the upper panel are separated, the first mold and the lens to be formed are separated, so as to achieve the purpose of priority separation. Air intervenes in the lens molding cavity through the clearance between the cylindrical bushing and the first mold to achieve a vacuum breaking state, thereby avoiding the problem of reverse separation caused by the lens to be formed fitting the first mold, thereby improving the PV surface accuracy and release stability, ensuring the quality of the lens, and enhancing the market competitiveness of the product.

[0033] During the lens molding production process, under the action of the injection molding machine, when the upper mold plate and the lower mold plate gradually approach or gradually separate, the guide column has an auxiliary guiding and positioning function, which can avoid the problem of large misalignment between the upper mold plate and the lower mold plate affecting the positioning effect of the first and second precision positioning columns, thereby improving the accuracy of the lens to be molded. When the upper mold plate and the lower mold plate are in close contact, there is a large gap between the guide column and the first bottom plate, which avoids the guide column abutting against the first bottom plate, resulting in the upper panel, the upper mold plate and the lower mold plate not being able to fully fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 It is a partial cross-sectional view of a lens mold in an embodiment of the utility model;

[0036] Figure 2 It is an embodiment of the utility model Figure 1 A partial enlarged view of the middle A;

[0037] Figure 3 It is a three-dimensional diagram of a lens mold in an embodiment of the utility model;

[0038] Figure 4 It is a schematic diagram of the cooperation between the upper plate and the lower plate in the embodiment of the utility model;

[0039] Figure 5It is a three-dimensional diagram of the upper panel in the embodiment of the utility model;

[0040] Figure 6 is a three-dimensional diagram of the first bottom plate and the second bottom plate in the embodiment of the utility model after being assembled;

[0041] Figure 7 It is a partial cross-sectional view from another angle of a lens mold in an embodiment of the utility model.

[0042] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0043] 1. Upper panel; 2. Upper mold plate; 3. Lower mold plate; 4. First base plate; 5. Second base plate; 6. First mold; 7. Second mold; 8. Lens molding cavity; 9. Spring; 10. Guide column; 11. Cylindrical bushing; 12. End; 13. Thread; 14. Second gap; 15. Locking buckle; 16. Injection port; 17. Gate sleeve; 18. Internal cooling water channel; 19. Surface cooling water channel; 20. Cover plate; 21. First precision positioning column; 22. Second precision positioning column; 23. Press block; 24. Adjustment gasket; 25. Gasket. DETAILED DESCRIPTION

[0044] The description of the embodiments of this specification should be combined with the corresponding drawings, which should be considered as part of the complete specification. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated for simplification or convenience. Furthermore, the parts of each structure in the drawings will be described separately. It is worth noting that the elements not shown in the drawings or not described in words are in a form known to ordinary technicians in the relevant technical field.

[0045] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The following description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0046] like Figures 1 to 7As shown, the utility model proposes a lens mold, including an upper mold assembly and a lower mold assembly arranged below the upper mold assembly, the upper mold assembly includes an upper panel 1 and an upper mold plate 2 below the upper panel 1, the lower mold assembly includes a lower mold plate 3 and a first bottom plate 4 below the lower mold plate 3, and the upper mold plate 2 and the lower mold plate 3 can be closely arranged without a gap; the upper panel 1, the upper mold plate 2, the lower mold plate 3, and the first bottom plate 4 are all set as rectangular plates. It can be understood that, while meeting the strength requirements, they can also be plates of other shapes, wherein the size of the upper panel 1 can be larger than the upper mold plate 2, the lower mold plate 3 and the first bottom plate 4, and the upper mold plate 2, the lower mold plate 3 and the first bottom plate 4 are the same size.

[0047] A first mold 6 penetrating the upper mold plate 2 is fixed on the upper panel 1, and a second mold 7 penetrating the lower mold plate 3 is fixed at a corresponding position on the first bottom plate 4. The upper mold plate 2 is tightly attached to the lower mold plate 3, and a lens molding cavity 8 is formed between the first mold 6 and the second mold 7. The first mold 6 and the second mold 7 are fixed by screws;

[0048] A spring 9 is provided between the upper panel 1 and the upper mold plate 2. The spring 9 is provided in a first groove on the lower surface of the upper panel 1. The upper panel 1 and the upper mold plate 2 are tightly attached so that when the spring 9 is compressed, the spring 9 is entirely in the first groove, thereby avoiding a gap between the upper panel 1 and the upper mold plate 2.

[0049] A plurality of guide posts 10 are fixed on the upper panel 1. Any guide post 10 passes through the upper mold plate 2 and the lower mold plate 3 in sequence and has a first gap with the first bottom plate 4. The number of guide posts 10 can be multiple, and they are usually distributed in a symmetrical structure, such as being arranged at the four corners of a rectangle.

[0050] The upper mold plate 2 is provided with a first through hole for the first mold 6 to pass through, and a cylindrical bushing 11 adapted to the first mold 6 is provided in the first through hole; the diameter of the cross section of the cylindrical bushing 11 at any position is slightly smaller than the diameter of the lens to be formed, and the cylindrical bushing 11 can apply pressure to the lens to be formed when the mold is released.

[0051] The lens mold includes an upper mold assembly and a lower mold assembly, the upper mold assembly is a fixed side, and the lower mold assembly is a movable side, that is, the lower mold assembly is movable under the action of the injection molding machine, so as to realize the free opening and closing of the upper mold assembly and the lower mold assembly. Among them, in order to facilitate the assembly of the lens mold, the first mold 6 and other structures are arranged on the upper surface of the upper panel 1. During assembly, the upper panel 1 is assembled in a way that it is inverted on the upper mold plate 2. Based on this, the upper surface of the upper panel 1 refers to the surface where the upper panel 1 contacts the upper mold plate 2; the upper surface of the upper mold plate 2 refers to the surface in contact with the upper panel 1; the upper surface of the lower mold plate 3 refers to the surface in contact with the upper mold plate 2; the upper surface of the first bottom plate 4 refers to the surface in contact with the lower mold plate 3; the lower surface of each plate is the surface opposite to the upper surface.

[0052] The upper mold assembly is provided with a first mold 6, and the lower mold assembly is provided with a second mold 7. During the lens molding production process, the upper mold plate 2 of the upper mold assembly and the lower mold plate 3 of the lower mold assembly can be tightly arranged without a gap under the action of the injection molding machine and the locking buckle, and the lens material is extruded and molded in the lens molding cavity 8.

[0053] like Figure 1 and Figure 2 As shown, during the process of mold opening and demolding, the upper panel 1 and the upper mold plate 2 are separated due to the pre-compression support force of the spring 9. When the upper mold plate 2 is separated from the upper panel 1, the locking effect of the locking buckle 15 between the upper mold plate 2 and the lower mold plate 3 and the pre-compression load force of the spring 9 between the upper mold plate 2 and the upper panel 1 restrict the upper mold plate 2 and the lower mold plate 3 from being separated in advance, so that the separation of the upper mold plate 2 and the upper panel 1 will be prior to the separation of the upper mold plate 2 and the lower mold plate 3. Based on the first mold 6 and the upper mold plate 1, the upper mold plate 2 and the lower mold plate 3 are separated. The fixed relationship between the plate 1, the second mold 7 and the first base plate 4, and the pressure of the cylindrical bushing 11 on the lens to be formed, when the upper mold plate 2 is separated from the upper panel 1, the first mold 6 and the lens to be formed will be separated, so as to achieve the purpose of priority release. The air enters the lens molding cavity 8 through the clearance between the cylindrical bushing 11 and the first mold 6 to achieve a vacuum-breaking state, avoiding the problem of reverse release caused by the lens to be formed fitting the first mold 6, thereby improving the PV surface accuracy and release stability, ensuring the quality of the lens, and enhancing the market competitiveness of the product.

[0054] During the lens molding production process, under the action of the injection molding machine, when the upper mold plate 2 and the lower mold plate 3 gradually approach or gradually separate, the guide column 10 has a guiding function, which can avoid the problem of misalignment between the upper mold plate 2 and the lower mold plate 3, thereby improving the accuracy of the lens to be molded. When the upper mold plate 2 and the lower mold plate 3 are in close contact, there is a large gap between the guide column 10 and the first base plate 4, which prevents the guide column 10 from abutting against the first base plate 4, resulting in the upper panel 1, the upper mold plate 2 and the lower mold plate 3 not being able to fully fit.

[0055] In some embodiments of the present invention, since the guide column 10 needs to guide the upper mold plate 2 and the lower mold plate 3, the strength of the guide column 10 is particularly important. The guide column 10 passes through the upper surface of the upper panel 1 to the lower surface and is fixed on the upper panel 1, which can improve the fixing strength of the guide column 10 and improve the production stability and reliability of the lens mold. An oil groove is provided on the guide column 10, and lubricating oil is applied to the guide column 10 to improve the lubrication between the guide column 10 and the upper mold plate 2 and the lower mold plate 3, so that the upper mold plate 2 and the lower mold plate 3 are gradually approached or separated. The lubricating oil can be stored in the oil groove for a long time, thereby improving the service life of the lubricating oil and reducing production costs.

[0056] In some embodiments of the utility model, the upper panel 1 is provided with a limit screw, the limit screw includes an end 12 and a columnar portion, the bottom end of the columnar portion is provided with a thread 13, and the columnar portion between the thread 13 and the end 12 is smoothly arranged;

[0057] The limit screw passes through the upper mold plate 2 from bottom to top and is fixed to the upper panel 1 through the thread 13. The end head 12 is located in the second groove of the upper mold plate 2. There is a second gap 14 between the lower surface of the end head 12 and the bottom surface of the second groove.

[0058] In some embodiments of the present invention, the spring 9 is sleeved on the outside of the limit screw.

[0059] The structure of the limit screw is divided into three parts, namely, the end 12, the smooth part and the thread 13 from top to bottom, wherein the thread 13 is locked and fixed to the upper panel 1, the smooth part is located in the hole of the upper mold plate 2, and the end 12 is located in the second groove of the upper mold plate 2, which can prevent the limit screw from affecting the gapless contact between the upper mold plate 2 and the lower mold plate 3, thereby ensuring the molding quality of the lens to be molded.

[0060] The lower surface of the end head 12 refers to the side close to the bottom surface of the second groove. There is a second gap 14 between the lower surface of the end head 12 and the bottom surface of the second groove. When the upper panel 1 and the upper mold plate 2 are separated, the separation stroke can be limited by the end head 12 of the limit screw and the second groove, thereby indirectly controlling the distance that the first mold 6 moves in the first through hole. The second gap 14 is the maximum stroke for the upper panel 1 and the upper mold plate 2 to separate.

[0061] In some embodiments of the utility model, at least one pair of locking buckles 15 that cooperate with each other are fixed to the side surfaces of the upper mold plate 2 and the lower mold plate 3. The locking buckles 15 are two magnets with different polarities respectively arranged on the upper mold plate 2 and the lower mold plate 3.

[0062] The locking buckle 15 is used to lock the upper mold plate 2 and the lower mold plate 3. By setting the magnetic locking buckle 15, during the mold opening and demolding process, the lower mold plate 3 moves downward, and there is a downward suction force on the upper mold plate 2, which can prevent the upper mold plate 2 and the lower mold plate 3 from opening and closing earlier than the upper panel 1 and the upper mold plate 2 due to insufficient load force or fatigue failure of the spring 9, thereby further ensuring that the separation of the upper mold plate 2 and the upper panel 1 will precede the separation of the upper mold plate 2 and the lower mold plate 3, thereby achieving the purpose of priority demolding, and air intervenes in the lens molding cavity 8 to reach a vacuum breaking state.

[0063] In some embodiments of the utility model, a material injection port 16 is provided at the center of the upper panel 1, and a sprue bushing 17 is provided at the material injection port 16. The sprue bushing 17 is fixed by screws, and a tapered hole with a wide top and a narrow bottom is provided at a position corresponding to the sprue bushing 17 on the upper mold plate 2, and the sprue bushing 17 is inserted into the tapered hole;

[0064] The upper mold plate 2 and the lower mold plate 3 are closely attached to form a feed channel, and the gate sleeve 17 is connected with the lens molding cavity 8 through the feed channel.

[0065] The lens molding material includes thermoplastic materials such as resin. The injection port 16 is used to add the lens molding material, and the material then enters the lens molding cavity 8 through the gate sleeve 17 and the feed channel between the upper mold plate 2 and the lower mold plate 3, thereby completing the feeding process of the lens injection molding.

[0066] By setting a tapered hole on the upper mold plate 2, the aperture size of the tapered hole gradually decreases from the upper surface to the lower surface of the upper mold plate 2, which can avoid the problem of the upper mold plate 2 wearing the gate sleeve 17 when the upper panel 1 is separated from the upper mold plate 2, thereby avoiding damage to the gate sleeve 17, solving the problem of frequent replacement of the gate sleeve 17, and reducing production costs.

[0067] like Figure 4 As shown, in some embodiments of the present invention, a plurality of first molds 6 are fixedly arranged on the lower surface of the upper panel 1 in a circular array around the gate sleeve 17, and a plurality of second molds 7 fixed in a circular array are also arranged on the corresponding first bottom plate 4.

[0068] In some embodiments of the present invention, internal cooling water channels 18 are provided in both the upper mold plate 2 and the lower mold plate 3;

[0069] The upper surface of the upper mold plate 2 and the lower surface of the lower mold plate 3 are both provided with a surface cooling water channel 19 , and the surface cooling water channel 19 is in a circular ring shape.

[0070] The function of the cooling water channel is to cool the entire lens mold. By providing an internal cooling water channel 18 in the upper mold plate 2 and the lower mold plate 3, the temperature of the upper mold plate 2 and the lower mold plate 3 can be effectively reduced. Figure 4 As shown, water inlets are provided on the sides of the upper mold plate 2 and the lower mold plate 3, and water outlets are provided on the opposite sides; or, among the four holes shown in the figure, the holes at the two ends are water inlets, and water outlets are provided on the opposite sides, and one of the two holes in the middle is a water inlet and the other is a water outlet, and a U-shaped connecting structure is formed inside the upper mold plate 2 or the lower mold plate 3.

[0071] The surface cooling water channel 19 on the upper surface of the upper mold plate 2 can cool the contact portion between the upper mold plate 2 and the upper panel 1, and the surface cooling water channel 19 on the lower surface of the lower mold plate 3 can cool the contact portion between the lower mold plate 3 and the first bottom plate 4. It can be understood that both surfaces of the upper mold plate 2 and both surfaces of the lower mold plate 3 can be provided with surface cooling water channels 19, and the upper panel 1, the first bottom plate 4, and the second bottom plate 5 can also be provided with internal cooling water channels 18.

[0072] The surface cooling water channel 19 is in a circular ring shape, which can improve the cooling range on the one hand, and on the other hand, the ring structure is convenient for production and processing.

[0073] In some embodiments of the utility model, a cover plate 20 is embedded and installed in the first groove on the lower surface of the upper panel 1. The size of the cover plate 20 is larger than the size of the annular surface cooling water channel 19, so that the cover plate 20 can play a certain sealing role on the surface cooling water channel 19. At the same time, the cover plate 20 can also press the cylindrical bushing 11, which is conducive to the upward movement of the cylindrical bushing 11.

[0074] In some embodiments of the present invention, a first precision positioning column 21 is fixed on the lower surface of the upper panel 1 , and the first precision positioning column 21 passes through the upper mold plate 2 and is adapted to be installed with a second precision positioning column 22 fixed on the first bottom plate 4 .

[0075] The number of the first precision positioning column 21 and the second precision positioning column 22 is the same, at least one, and the first precision positioning column 21 is disposed on the outer side of the cover plate 20 .

[0076] like Figure 5 and Figure 7 As shown, in some embodiments of the present utility model, one end of the first precision positioning column 21 is fixed to the upper panel 1 through a pressing block 23, and the other end is set to a groove structure;

[0077] The second precision positioning column 22 passes through the lower mold plate 3 to form a boss structure matched with the groove structure. The groove structure and the boss structure form an embedded adaptation structure, which plays a positioning role in the repeated opening and closing process.

[0078] In some embodiments of the present invention, the groove structure is a conical groove, and the boss structure is a truncated cone. The cooperation between the conical groove and the truncated cone can improve the positioning accuracy.

[0079] like Figure 6 As shown, in some embodiments of the present invention, the first precision positioning column 21 is fixed to the upper panel 1 by means of a pressing block 23 and screws, and the second precision positioning column 22 is fixed to the first bottom plate 4 by means of screws, so as to improve the fastness of the connection, thereby improving the stability and reliability of the lens mold;

[0080] Adjustment gaskets 24 are provided between the first precision positioning column 21 and the pressing block 23 , and between the second precision positioning column 22 and the first bottom plate 4 , and have the function of adjusting the positioning strength of the first precision positioning column 21 and the second precision positioning column 22 .

[0081] In some embodiments of the present invention, a pad 25 is provided between the first mold 6 and the upper panel 1, and between the second mold 7 and the first base plate 4. The pad 25 has the function of adjusting the height of the first mold 6 and the second mold 7, which can effectively reduce the difficulty and cost of lens mold maintenance.

[0082] like Figure 3 and Figure 6As shown, in some embodiments of the utility model, a second base plate 5 is also included, and the lower mold plate 3, the first base plate 4 and the second base plate 5 are connected and fixed in sequence by screws. The injection molding machine drives the lower mold plate 3 and the first base plate 4 to move by exerting force on the second base plate 5, thereby ensuring the accuracy of the lower mold plate 3 and the first base plate 4.

[0083] The above is an explanation of the implementation mode of the present application by specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation mode. On the contrary, the purpose of introducing the application in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of the present application. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0084] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "outside", "inside", "circumferential", "radial", "axial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0085] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection" and "fitting" should be understood in a broad sense, for example, it 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0086] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A lens mold, comprising an upper mold assembly and a lower mold assembly disposed below the upper mold assembly, characterized in that: The upper mold assembly comprises an upper panel (1) and an upper mold plate (2) below the upper panel (1); the lower mold assembly comprises a lower mold plate (3) and a first bottom plate (4) below the lower mold plate (3); the upper mold plate (2) and the lower mold plate (3) can be closely arranged without a gap under the action of an injection molding machine and a mold locking buckle; A first mold (6) penetrating the upper mold plate (2) is fixed on the upper panel (1), and a second mold (7) penetrating the lower mold plate (3) is fixed at a corresponding position on the first bottom plate (4); the upper mold plate (2) and the lower mold plate (3) are tightly attached, and a lens molding cavity (8) is formed between the first mold (6) and the second mold (7); A spring (9) is arranged between the upper panel (1) and the upper mold plate (2), and the spring (9) is arranged in a first groove on the lower surface of the upper panel (1); A plurality of guide pillars (10) are fixed on the upper panel (1), and any of the guide pillars (10) sequentially passes through the upper mold plate (2) and the lower mold plate (3) and has a first gap with the first bottom plate (4); The upper mold plate (2) is provided with a first through hole for the first mold (6) to pass through, and a cylindrical bushing (11) adapted to the first mold (6) is provided in the first through hole; The diameter of the cross section of the cylindrical bushing (11) at any position is slightly smaller than the diameter of the lens to be formed.

2. The lens mold according to claim 1, characterized in that: The guide column (10) passes through from the upper surface of the upper panel (1) to the lower surface and is fixed on the upper panel (1). An oil groove is provided on the guide column (10).

3. The lens mold according to claim 1, characterized in that: The upper panel (1) is provided with a limit screw, and the limit screw comprises an end head (12) and a columnar portion, the bottom end of the columnar portion is provided with a thread (13), and the columnar portion between the thread (13) and the end head (12) is smoothly arranged.

4. The lens mold according to claim 3, characterized in that: The limit screw passes through the upper mold plate (2) from bottom to top and is fixed to the upper panel (1) via the thread (13); the end head (12) is located in the second groove of the upper mold plate (2); and a second gap (14) exists between the lower surface of the end head (12) and the bottom surface of the second groove.

5. The lens mold according to claim 3 or 4, characterized in that: The spring (9) is sleeved on the outside of the limit screw.

6. The lens mold according to claim 1, characterized in that: At least one pair of the locking buckles (15) is fixedly arranged on the side of the upper mold plate (2) and the side of the lower mold plate (3), and the locking buckles (15) are two magnets with different polarities respectively arranged on the upper mold plate (2) and the lower mold plate (3).

7. The lens mold according to claim 1, characterized in that: The upper panel (1) is provided with an injection port (16) at the center thereof, the injection port (16) is provided with a sprue bushing (17), a tapered hole which is wider at the top and narrower at the bottom is provided at a position on the upper mold plate (2) corresponding to the sprue bushing (17), and the sprue bushing (17) is inserted into the tapered hole; The upper mold plate (2) and the lower mold plate (3) are tightly attached to form a feed channel, and the gate sleeve (17) is connected to the lens molding cavity (8) through the feed channel.

8. The lens mold according to claim 7, characterized in that: A plurality of the first molds (6) are fixedly arranged on the lower surface of the upper panel (1) in a circular array around the sprue sleeve (17).

9. The lens mold according to claim 1, characterized in that: The upper mold plate (2) and the lower mold plate (3) are both provided with internal cooling water channels (18); The upper surface of the upper mold plate (2) and the lower surface of the lower mold plate (3) are both provided with a surface cooling water channel (19), and the surface cooling water channel (19) is in a circular ring shape.

10. The lens mold according to claim 9, characterized in that: A cover plate (20) is embedded and installed in the first groove on the lower surface of the upper panel (1), and the size of the cover plate (20) is larger than the size of the annular surface cooling water channel (19).

11. The lens mold according to claim 1, characterized in that: A first precision positioning column (21) is also fixed on the lower surface of the upper panel (1), and the first precision positioning column (21) passes through the upper mold plate (2) and is adapted to be installed with a second precision positioning column (22) fixed on the first bottom plate (4).

12. The lens mold according to claim 11, characterized in that: One end of the first precision positioning column (21) is fixed to the upper panel (1) via a pressing block (23), and the other end is arranged as a groove structure; The second precision positioning column (22) passes through the lower mold plate (3) to form a boss structure that matches the groove structure.

13. The lens mold according to claim 12, characterized in that: The groove structure is a conical groove, and the boss structure is a truncated cone.

14. The lens mold according to claim 13, characterized in that: The first precision positioning column (21) is fixed to the upper panel (1) via a pressing block (23) and screws, and the second precision positioning column (22) is fixed to the first bottom plate (4) via screws; Adjustment gaskets (24) are provided between the first precision positioning column (21) and the pressing block (23), and between the second precision positioning column (22) and the first bottom plate (4).

15. The lens mold according to claim 1, characterized in that: Pads (25) are provided between the first mold (6) and the upper panel (1), and between the second mold (7) and the first bottom plate (4).

16. The lens mold according to claim 1, characterized in that: It also comprises a second bottom plate (5), wherein the lower mold plate (3), the first bottom plate (4) and the second bottom plate (5) are connected and fixed in sequence by screws.

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