Multi-cavity die for contact lens female die

Abstract

The utility model relates to the technical field of injection molds, in particular to a multi-cavity mold for a contact lens female mold. Comprising a panel, a bottom plate, an ejector plate group and a plurality of mold core modules with the same structure, square iron is fixedly arranged at the two ends of the upper portion of the bottom plate, a plate B is fixedly arranged on the square iron, and each mold core module comprises an upper mold core assembly capable of being integrally detached from the plate A and a lower mold core assembly capable of being integrally detached from the plate B; the upper mold core assembly comprises an upper mold core; the lower mold core assembly comprises a lower mold core mounting plate, a lower mold core fixed above the lower mold core mounting plate, a mold core ejector plate group mounted between the lower mold core mounting plate and the lower mold core, an ejector pin and a reset rod which are fixed on the mold core ejector plate group, and a mold core spring fixed between the lower mold core and the mold core ejector plate group; according to the utility model, the insert or the optical insert core can be quickly replaced without dismounting the plate A or the plate B, and the replacement is quick and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a multi-cavity mold for a contact lens concave mold. Background Art

[0002] Contact lenses, also called contact lenses or contact glasses, refer to lenses that are worn on the cornea of ​​the eye to correct vision or protect the eyes. Contact lenses not only bring great improvements in appearance and convenience to patients with refractive errors such as myopia, hyperopia, and astigmatism, but also provide a wide field of vision and realistic vision. In addition, they also play a special role in controlling the development of myopia and astigmatism in adolescents and treating special eye diseases.

[0003] At present, the contact lens manufacturing methods include turning, centrifugal (also known as rotation) and molding (also known as casting). Among them, the molding method is to use metal molds to make polyester concave and convex molds, and the metal molds are polished by precision CNC machine tools; liquid lens monomers are dripped into the concave mold, and the convex mold is inserted into the concave mold and fastened; ultraviolet radiation is used for curing; and the mold is opened and the edges are trimmed. In the prior art, the mold structure for injection molding polyester concave molds is not optimized enough, and the disassembly and assembly of the mold core requires the removal of the A plate or the B plate, which is inconvenient for maintenance and replacement of inserts. A multi-cavity mold for a contact lens concave mold is now proposed to solve the problems existing in the prior art. Utility Model Content

[0004] The utility model aims to provide a multi-cavity mold for a contact lens concave mold to solve the problems in the prior art that the mold structure for injection molding a polyester concave mold is not optimized enough, the disassembly and assembly of the mold core requires the removal of the A plate or the B plate, and it is inconvenient to repair and replace the inserts.

[0005] The technical scheme of the utility model is: a multi-cavity mold for a contact lens concave mold, comprising a panel, a bottom plate, an ejector plate group, and a plurality of mold core modules with the same structure, wherein an A plate is provided below the panel; square irons are fixedly provided at both ends above the bottom plate, and a B plate is fixedly provided on the square irons.

[0006] Each of the mold core modules includes an upper mold core assembly that can be completely disassembled on the A plate, and a lower mold core assembly that can be completely disassembled on the B plate;

[0007] The upper mold core assembly includes an upper mold core; the lower mold core assembly includes a lower mold core mounting plate, a lower mold core fixed above the lower mold core mounting plate, a mold core ejector plate group installed between the lower mold core mounting plate and the lower mold core, an ejector and a reset rod fixed on the mold core ejector plate group, and a mold core spring fixed between the lower mold core and the mold core ejector plate group; a hole is vertically penetrated through the lower mold core for the ejector and the reset rod to pass through; a plurality of legs are arranged around the bottom surface of the lower mold core, and space is provided between the plurality of legs to accommodate the lifting and lowering of the mold core ejector plate group.

[0008] Preferably, the upper mold core assembly further comprises an upper insert detachably mounted on the upper mold core, and an upper cavity is formed on the bottom surface of the upper mold core; an optical insert assembly is detachably mounted on the lower mold core, and a lower cavity is formed on the top surface of the lower mold core;

[0009] The cavity formed by enclosing the upper mold core, the upper insert, the lower mold core, and the optical insert assembly is spliced ​​together with the upper cavity and the lower cavity to form a product cavity.

[0010] Preferably, the optical insert assembly comprises a sleeve detachably mounted on the lower mold core, and an optical insert detachably mounted on the sleeve; a protective block is fixedly mounted on the four sides of the top of the lower mold core, and the top surfaces of the protective block and the optical insert are both higher than the top surface of the lower mold core, and the top surface of the protective block is higher than the top surface of the optical insert.

[0011] Preferably, the upper mold core is provided with an upper mounting hole vertically therethrough, an upper positioning rod is fixed in the upper mounting hole by bolts, and a positioning hole is provided at the lower end of the upper positioning rod;

[0012] The lower mold core is vertically penetrated with a lower mounting hole, a lower positioning rod is fixed in the lower mounting hole by bolts, and the upper end of the lower positioning rod is provided with a positioning column which is plugged into the positioning hole.

[0013] Preferably, a push rod is fixed on the push pin plate assembly, one end of the push rod is fixed on the push pin plate assembly, and the other end passes through the lower mold core mounting plate, and when the push rod is at the lowest point of its stroke, the top surface of the push rod is flush with the top surface of the lower mold core mounting plate;

[0014] The lower end surface of the lower die core is concave upward to form a spring mounting hole, the die core spring is installed in the spring mounting hole, one end of the die core spring is fixed to the bottom of the spring mounting hole, and the other end is fixed to the top surface of the die core ejector plate assembly.

[0015] Preferably, cooling pipelines are evenly distributed inside the upper mold core and the lower mold core.

[0016] Preferably, the number of the mold core modules is two, four or eight, and the product cavity in each mold core module includes eight product cavity units with identical structures distributed in a ring shape, and each product cavity unit is connected to the center point of the circle formed by the eight product cavity units through a straight cavity of the same length.

[0017] Preferably, a lower notch is provided at a corner of the lower end of the upper die core, and the lower notch abuts against a portion of a nut of a bolt that fixes the upper die core to the A plate;

[0018] An upper notch is provided at a corner of the upper end of the lower die core, and the upper notch abuts against a portion of a nut of a bolt that fixes the lower die core to the B plate.

[0019] Preferably, a guide column is fixedly provided at the corner of the B plate, and a guide sleeve matched with the guide column is fixedly provided at the corner of the A plate;

[0020] A bottom plate through hole is provided on the bottom plate, and a push rod is provided in the bottom plate through hole; the ejector plate group includes an upper ejector plate and a lower ejector plate, the lower ejector plate is fixed to the upper end surface of the push rod, the upper ejector plate is fixed to the upper end surface of the lower ejector plate, and a main reset rod is also fixed on the upper ejector plate, and a main spring is sleeved on the main reset rod.

[0021] Preferably, the upper ejector plate and the lower ejector plate are both penetrated by a guide rod through hole, and a guide rod matching the guide rod through hole is fixedly provided between the bottom plate and the B plate;

[0022] The A plate and the B plate are both provided with cooling pipelines inside.

[0023] Compared with the prior art, the advantages of the utility model are:

[0024] (1) The utility model discloses a sixteen-cavity mold for a contact lens concave mold, comprising a panel, a bottom plate, a pin plate group, and two mold core modules with the same structure. A plate and a hot runner plate are provided below the panel. The hot runner plate is provided with square irons fixed at both ends above the hot runner bottom plate. Pads and B plates are fixed on the square irons. Each mold core module comprises an upper mold core assembly that can be disassembled as a whole on the A plate and a lower mold core assembly that can be disassembled as a whole on the B plate. The upper mold core assembly can be disassembled as a whole by unscrewing the four upper fixing bolts, and the lower mold core assembly can be disassembled as a whole by unscrewing the four lower fixing bolts. The utility model discloses a quick replacement of the upper insert or the optical insert without removing the A plate or the B plate, and the replacement is quick and convenient.

[0025] (2) The lower mold core assembly of the utility model includes a lower mold core mounting plate, a lower mold core fixed on the lower mold core mounting plate, a mold core ejector plate group installed between the lower mold core mounting plate and the lower mold core, an ejector and a reset rod fixed on the mold core ejector plate group, and a mold core spring fixed between the lower mold core and the mold core ejector plate group. The product ejection structure is integrated on the lower mold core, which facilitates the expansion of a sixteen-hole mold into a thirty-two-hole, sixty-four-hole or other number of hole molds, thereby improving the production efficiency of injection molded products, and the product quality is stable and the scrap rate is low.

[0026] (3) In the utility model, a sixteen-hole mold for a contact lens concave mold is provided, wherein an upper mold core is vertically penetrated with an upper mounting hole, an upper positioning rod is fixed in the upper mounting hole by bolts, and a positioning hole is provided at the lower end of the upper positioning rod; a lower mold core is vertically penetrated with a lower mounting hole, a lower positioning rod is fixed in the lower mounting hole by bolts, and a positioning column is provided at the upper end of the lower positioning rod to engage with the positioning hole. The positioning column and the positioning hole are used for precise positioning between the upper mold core and the lower mold core, to avoid slight misalignment between the upper mold core and the lower mold core when the mold is closed, and to improve the injection molding accuracy of the product.

[0027] (4) In the utility model, a sixteen-cavity mold for a contact lens concave mold is provided, and a protective block is fixedly installed on the four sides of the top of the lower mold core. The top surfaces of the protective block and the optical insert are both higher than the top surface of the lower mold core, and the top surface of the protective block is higher than the top surface of the optical insert. When the optical insert is disassembled, the lower mold core needs to be turned upside down. Since the top surface of the protective block is higher than the top surface of the optical insert when it is placed upright, the protective block can prevent the optical insert from contacting the ground when it is turned upside down. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0029] Figure 1 It is a structural schematic diagram of a sixteen-cavity mold for a contact lens concave mold according to the first embodiment;

[0030] Figure 2 for Figure 1 A top view of

[0031] Figure 3 for Figure 2 Cross-section at AA in the middle;

[0032] Figure 4 This is a schematic diagram of the structure of the mold core module, the B plate, the backing plate, and the bottom plate described in Example 1;

[0033] Figure 5 It is a structural schematic diagram of the lower mold core assembly and the B plate, the backing plate, and the bottom plate described in Example 1;

[0034] Figure 6 It is a schematic diagram of the structure of the upper mold core assembly, the A plate, the hot runner plate, and the face plate described in Example 1;

[0035] Figure 7 This is a schematic structural diagram of the mold core module described in Example 1;

[0036] Figure 8 for Figure 7 A top view of

[0037] Fig. 9 for Figure 8 Cross-section at the middle BB;

[0038] Fig.10 for Figure 7 A top view of

[0039] Fig.11 for Fig.10 Sectional view at CC;

[0040] Fig.12 It is a structural schematic diagram of the lower mold core assembly described in Example 1;

[0041] Fig.13 for Fig.12 A top view of

[0042] Fig.14 for Fig.13 Sectional view at DD in the middle;

[0043] Fig.15 This is a structural diagram of the lower mold core described in Example 1;

[0044] Fig.16 It is a structural schematic diagram of the upper mold core assembly described in Example 1;

[0045] Fig.17 for Fig.16 A top view of

[0046] Fig.18 for Fig.17 Sectional view at EE in the middle;

[0047] Fig.19 A product (concave contact lens mold) molded by a sixteen-cavity mold for a contact lens mold in the first embodiment;

[0048] Fig. 20 It is a partial structural schematic diagram of a mold with thirty-two cavities for a contact lens concave mold according to the second embodiment;

[0049] Fig.21 It is a partial structural schematic diagram of a mold with sixty-four cavities for a contact lens concave mold as described in Example 3;

[0050] Fig. 22 The first water channel in the upper mold core of the sixteen-cavity mold for the contact lens concave mold in the first embodiment of the present invention;

[0051] Fig.23 The present invention is a second water channel in a lower mold core of a sixteen-cavity mold for a contact lens concave mold in the first embodiment of the present invention.

[0052] Among them: 1. Panel, 2. Bottom plate, 3. Upper ejector plate, 4. Lower ejector plate, 5. A plate, 6. Hot runner plate, 7. Square iron, 8. Pad, 9. B plate, 10. Mold module, 11. Upper mold assembly, 12. Upper mold, 13. Upper insert, 14. Lower mold assembly, 15. Lower mold mounting plate, 16. Lower mold, 17. Upper mold ejector plate, 18. Lower mold ejector plate, 19. Ejector, 20. Reset rod, 21. Support foot, 2 2. Lower notch, 23. Upper fixing bolt, 24. Upper notch, 25. Lower fixing bolt, 26. Protective block, 27. Optical insert, 28. Upper positioning rod, 29. Positioning hole, 30. Lower positioning rod, 31. Positioning column, 32. Mold core spring, 33. Hot runner, 34. Upper cavity, 35. Lower cavity, 36. Ejector rod, 37. Spring mounting hole, 38. Contact lens die, 39. Insert, 40. First water channel, 41. Second water channel. DETAILED DESCRIPTION

[0053] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0054] In the description of the utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0055] Embodiment 1

[0056] like Figure 1 , Figure 2 , Figure 3 As shown, a sixteen-cavity mold for a contact lens concave mold is used to inject a contact lens concave mold 38 (such as Fig.19 As shown), it includes a panel 1, a bottom plate 2, an ejector plate assembly, and a plurality of mold core modules 10 with the same structure (such as Figure 3 , Figure 4 As shown), an A plate 5 and a hot runner plate 6 are provided below the panel 1, and a hot runner 33 is installed in the hot runner plate 6; square irons 7 are fixedly provided at both ends above the bottom plate 2, and pads 8 and B plates 9 are fixedly provided on the square irons 7, as shown in FIG. Figure 7 , Fig.10 , Fig.11 As shown, each mold core module 10 includes an upper mold core assembly 11 that can be completely disassembled on the A plate 5 and a lower mold core assembly 14 that can be completely disassembled on the B plate 9; Fig.16 , Fig.17 , Fig.18 As shown, the upper mold core assembly 11 includes an upper mold core 12; the upper mold core assembly 11 also includes an upper insert 13 detachably mounted on the upper mold core 12, and an upper mold cavity 34 is formed on the bottom surface of the upper mold core 12; Fig.12 , Fig.13 , Fig.14 As shown, the lower die core assembly 14 includes a lower die core mounting plate 15, a lower die core 16 fixed on the lower die core mounting plate 15, a die core ejector plate group installed between the lower die core mounting plate 15 and the lower die core 16, an ejector 19 and a reset rod 20 fixed on the die core ejector plate group, and a die core spring 32 fixed between the lower die core 16 and the die core ejector plate group. A hole is vertically penetrated through the lower die core 16 for the ejector 19 and the reset rod 20 to pass through; a plurality of legs 21 (such as Fig.15 There is space between the multiple legs 21 to accommodate the lifting of the mold core ejector plate assembly. The optical input subassembly is detachably mounted on the lower mold core 16, and the top surface of the lower mold core 16 is provided with a lower cavity 35 (as shown in FIG. Fig.12 as shown); Fig.11 As shown, the cavity formed by the upper mold core 12, the upper insert 13, the lower mold core 16, and the optical insert assembly are combined with the upper cavity 34 and the lower cavity 35 to form a product cavity. Fig.14 As shown, the mold core ejector plate assembly includes an upper mold core ejector plate 17 and a lower mold core ejector plate 18 , an ejector 19 and a reset rod 20 are fixed on the upper mold core ejector plate 17 , and the upper mold core ejector plate 17 is fixed on the lower mold core ejector plate 18 .

[0057] A lower notch 22 is provided at the corner of the lower end of the upper mold core 12 (such as Figure 7 , Fig.16 As shown), Figure 6 As shown, the lower notch 22 abuts against a portion of the nut of the upper fixing bolt 23 that fixes the upper die core 12 to the A plate 5; an upper notch 24 is provided at the corner of the upper end of the lower die core 16 (as shown in FIG. Figure 7 , Fig.12 As shown), Figure 5 As shown, the upper notch 24 abuts against a portion of the nut of the lower fixing bolt 25 that fixes the lower die core 16 to the B plate 9. Figure 6 As shown, the upper mold core assembly 11 can be disassembled as a whole by unscrewing the four upper fixing bolts 23. Figure 5 As shown, the lower mold core assembly 14 can be disassembled as a whole by unscrewing the four lower fixing bolts 25. This embodiment allows the upper insert or optical insert 27 to be replaced without removing the A plate 5 or the B plate 9, and the replacement is quick and convenient.

[0058] like Fig.14As shown, the optical insert assembly includes a sleeve 39 detachably mounted on the lower mold core, and an optical insert 27 detachably mounted on the sleeve; a protective block 26 is fixedly mounted on the four sides of the top of the lower mold core 16, and the top surfaces of the protective block 26 and the optical insert 27 are both higher than the top surface of the lower mold core 16, and the top surface of the protective block 26 is higher than the top surface of the optical insert 27. The function of the protective block 26 is: when the optical insert 27 is disassembled, the lower mold core 16 needs to be turned upside down. Since the top surface of the protective block 26 is higher than the top surface of the optical insert 27 when it is placed upright, the protective block 26 can prevent the optical insert 27 from contacting the ground when it is turned upside down.

[0059] like Figure 8 , Fig. 9 As shown, the upper mold core 12 is vertically penetrated with an upper mounting hole, an upper positioning rod 28 is fixed in the upper mounting hole by bolts, and a positioning hole 29 is formed at the lower end of the upper positioning rod 28; the lower mold core 16 is vertically penetrated with a lower mounting hole, a lower positioning rod 30 is fixed in the lower mounting hole by bolts, and a positioning column 31 is provided at the upper end of the lower positioning rod 30 for plugging and fitting with the positioning hole 29. The positioning column 31 and the positioning hole 29 are used for precise positioning between the upper mold core 12 and the lower mold core 16, avoiding slight misalignment between the upper mold core 12 and the lower mold core 16 when the mold is closed, and improving the injection molding accuracy of the product.

[0060] In this embodiment, there are two mold core modules 10, and the product cavity in each mold core module 10 includes eight product cavity units with the same structure distributed in a ring shape. Each product cavity unit is connected to the center point of the circle formed by the eight product cavity units through a straight cavity of the same length, and the center point is the glue inlet.

[0061] The corners of the B plate 9 are fixed with guide posts, and the corners of the A plate 5 are fixed with guide sleeves matched with the guide posts; the bottom plate 2 is provided with a bottom plate through hole, and a push rod is arranged in the bottom plate through hole; the ejector plate group includes an upper ejector plate 3 and a lower ejector plate 4, the lower ejector plate 4 is fixed to the upper end surface of the push rod, the upper ejector plate 3 is fixed to the upper end surface of the lower ejector plate 4, and a main reset rod is also fixed on the upper ejector plate 3, and a main spring is sleeved on the main reset rod. The upper ejector plate 3 and the lower ejector plate 4 are both penetrated with a guide rod through hole, and a guide rod matched with the guide rod through hole is fixed between the bottom plate 2 and the B plate 9.

[0062] like Figure 3As shown, a push rod 36 is fixed on the ejector plate assembly, one end of the push rod 36 is fixed on the upper ejector plate 3, and the other end passes through the lower mold core mounting plate 15, and when the push rod 36 is at the lowest point of its stroke, the top surface of the push rod 36 is flush with the top surface of the lower mold core mounting plate 15; the lower end surface of the lower mold core 16 is concave upward to form a spring mounting hole 37, and the mold core spring 32 is installed in the spring mounting hole 37, one end of the mold core spring 32 is fixed to the bottom of the spring mounting hole 37, and the other end is fixed to the top surface of the mold core ejector plate assembly. In this embodiment, after the injection molding is completed and the mold is opened, the ejector rod of the injection molding machine pushes the upper ejector plate 3 and the lower ejector plate 4 to extend at the same time (the main spring is compressed at this time), thereby driving the ejector rod 36 to extend, and the ejector rod 36 drives the upper mold core ejector plate 17 and the lower mold core ejector plate 18 to extend at the same time (the mold core spring 32 is compressed at this time), and the ejector 19 fixed on the upper mold core ejector plate 17 pushes the injection-molded contact lens die 38 from the lower cavity 35. After the ejector rod of the injection molding machine is retracted, the upper ejector plate 3 and the lower ejector plate 4, the main reset rod, and the ejector rod 36 are reset under the elastic force of the main spring. After the ejector rod 36 is retracted, the ejector 19 and the reset rod 20 on the upper mold core ejector plate 17 are reset under the elastic force of the mold core spring 32.

[0063] The upper die core 12 and the lower die core 16 are evenly distributed with cooling pipes, such as Fig. 22 , Fig.23 As shown, the upper mold core 12 is provided with a first water channel 40, and the lower mold core 16 is provided with a second water channel 41. In this embodiment, the first water channel 40 and the second water channel 41 are both provided by 3D printing and diffusion welding processes, and can be arranged in a ring around the upper insert 13 and the insert sleeve 39. Compared with the prior art using a linear water channel, the inlet and outlet temperature difference in the water channel in this embodiment can be controlled at 2°C, which greatly reduces the injection molding cycle; the A plate 5 and the B plate 9 are both provided with cooling pipes. The upper mold core 12 and the lower mold core 16, the A plate 5 and the B plate 9 are fully connected on all four sides with water channels, and the cooling is uniform, which ensures the consistency of the product and reduces the injection molding cycle.

[0064] Embodiment 2

[0065] like Fig. 20 As shown, a mold with thirty-two cavities for a contact lens cavity is shown. This embodiment is different from the first embodiment in that the number of mold core modules 10 is four, and four contact lens cavities 38 can be injection molded at one time. When the number of mold core modules 10 changes, the structure of the mold needs to be adaptively adjusted, and the adjustment can be easily implemented by technicians in this field.

[0066] Embodiment 3

[0067] like Fig.21As shown, a mold with sixty-four cavities for contact lens concave molds. This embodiment is different from the first embodiment in that the number of mold core modules 10 is eight, and eight contact lens concave molds 38 can be injection molded at one time. When the number of mold core modules 10 changes, the structure of the mold needs to be adaptively adjusted, and the adjustment can be easily implemented by technicians in this field.

[0068] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A multi-cavity mold for a contact lens concave mold, comprising a panel, a bottom plate, an ejector plate group, and a plurality of mold core modules with the same structure, wherein an A plate is provided below the panel; square irons are fixedly provided at both ends above the bottom plate, and a B plate is fixedly provided on the square irons, characterized in that: Each of the mold core modules includes an upper mold core assembly that can be completely disassembled on the A plate, and a lower mold core assembly that can be completely disassembled on the B plate; The upper mold core assembly includes an upper mold core; the lower mold core assembly includes a lower mold core mounting plate, a lower mold core fixed above the lower mold core mounting plate, a mold core ejector plate group installed between the lower mold core mounting plate and the lower mold core, an ejector and a reset rod fixed on the mold core ejector plate group, and a mold core spring fixed between the lower mold core and the mold core ejector plate group; a hole is vertically penetrated through the lower mold core for the ejector and the reset rod to pass through; a plurality of legs are arranged around the bottom surface of the lower mold core, and space is provided between the plurality of legs to accommodate the lifting and lowering of the mold core ejector plate group.

2. The multi-cavity mold for a contact lens concave mold according to claim 1, characterized in that: The upper mold core assembly also includes an upper insert detachably mounted on the upper mold core, and an upper cavity is formed on the bottom surface of the upper mold core; an optical insert assembly is detachably mounted on the lower mold core, and a lower cavity is formed on the top surface of the lower mold core; The cavity formed by enclosing the upper mold core, the upper insert, the lower mold core, and the optical insert assembly is spliced ​​together with the upper cavity and the lower cavity to form a product cavity.

3. The multi-cavity mold for a contact lens concave mold according to claim 2, characterized in that: The optical insert assembly includes an insert sleeve detachably mounted on the lower mold core, and an optical insert detachably mounted on the insert sleeve; a protective block is fixedly mounted on the four sides of the top of the lower mold core, and the top surfaces of the protective block and the optical insert are both higher than the top surface of the lower mold core, and the top surface of the protective block is higher than the top surface of the optical insert.

4. The multi-cavity mold for a contact lens concave mold according to claim 1, characterized in that: The upper mold core is vertically penetrated with an upper mounting hole, an upper positioning rod is fixed in the upper mounting hole by bolts, and a positioning hole is formed at the lower end of the upper positioning rod; The lower mold core is vertically penetrated with a lower mounting hole, a lower positioning rod is fixed in the lower mounting hole by bolts, and the upper end of the lower positioning rod is provided with a positioning column which is plugged into the positioning hole.

5. The multi-cavity mold for a contact lens concave mold according to claim 1, characterized in that: A push rod is fixed on the push pin plate assembly, one end of the push rod is fixed on the push pin plate assembly, and the other end passes through the lower mold core mounting plate, and when the push rod is at the lowest point of its stroke, the top surface of the push rod is flush with the top surface of the lower mold core mounting plate; The lower end surface of the lower die core is concave upward to form a spring mounting hole, the die core spring is installed in the spring mounting hole, one end of the die core spring is fixed to the bottom of the spring mounting hole, and the other end is fixed to the top surface of the die core ejector plate assembly.

6. The multi-cavity mold for a contact lens concave mold according to claim 1, characterized in that: Cooling pipelines are evenly distributed inside the upper die core and the lower die core.

7. The multi-cavity mold for a contact lens concave mold according to claim 2, characterized in that: The number of the mold core modules is two, four or eight, and the product cavity in each mold core module includes eight product cavity units with the same structure distributed in a ring shape, and each product cavity unit is connected to the center point of the circle formed by the eight product cavity units through a straight cavity of the same length.

8. The multi-cavity mold for a contact lens concave mold according to claim 1, characterized in that: A lower notch is provided at a corner of the lower end of the upper die core, and the lower notch abuts against a portion of a nut of a bolt that fixes the upper die core to the A plate; An upper notch is provided at a corner of the upper end of the lower die core, and the upper notch abuts against a portion of a nut of a bolt that fixes the lower die core to the B plate.

9. The multi-cavity mold for a contact lens concave mold according to claim 1, characterized in that: A guide column is fixedly provided at the corner of the B plate, and a guide sleeve matched with the guide column is fixedly provided at the corner of the A plate; A bottom plate through hole is provided on the bottom plate, and a push rod is provided in the bottom plate through hole; the ejector plate group includes an upper ejector plate and a lower ejector plate, the lower ejector plate is fixed to the upper end surface of the push rod, the upper ejector plate is fixed to the upper end surface of the lower ejector plate, and a main reset rod is also fixed on the upper ejector plate, and a main spring is sleeved on the main reset rod.

10. The multi-cavity mold for a contact lens concave mold according to claim 9, characterized in that: The upper ejector plate and the lower ejector plate are both penetrated by a guide rod through hole, and a guide rod matching the guide rod through hole is fixedly provided between the bottom plate and the B plate; The A plate and the B plate are both provided with cooling pipelines inside.

Images