A mold with efficient cavity switching, lens blank and production method thereof

Abstract

The present invention belongs to the technical field of lens production, and discloses a mold for efficient cavity switching, a lens blank and a production method thereof, including raw material preparation, mold assembly, demoulding and surface treatment; the mold for efficient cavity switching is provided with an upper mold base and a lower mold base, the upper mold base is provided with a fixing hole, the lower mold base is provided with a fixing column, the lower mold base is connected to the fixing hole on the upper mold base through the fixing column, the upper mold base is provided with a film pressing table, and the lower mold base is provided with a mold receiving table; the present invention can meet people's pursuit of diversified lens appearance on the basis of ensuring lens performance, and changes the disadvantages of the traditional lens with a single form and simple structure, so that the lens has a diversified appearance design, and the structural form is more beautiful and diverse, and at the same time, the lens blank can save more materials when cutting effective lenses. The present invention can change the appearance, shape and size of the lens blank by switching the lens blank frame.

Description

Technical Field

[0001] The invention belongs to the technical field of lens manufacturing, and in particular relates to a mold for efficiently switching cavities, a lens blank and a production method thereof. Background Art

[0002] At present, with the development of society, people's demand for glasses is increasing, and the requirements for glasses are gradually developing towards high quality and high performance. The design of lenses should be developed from appearance to performance to meet people's needs, but traditional lenses have a single style. The technology that meets functional requirements cannot meet the requirements of aesthetic style, and there are currently no molds on the market that can produce a variety of lens blanks, especially molds that can switch to any lens blank shape.

[0003] Through the above analysis, the problems and defects of the prior art are as follows:

[0004] The existing lens blank molds for producing lens blanks have a single style of lenses, which cannot meet the requirements of aesthetic style, and a large amount of lens materials are wasted when the produced lens blanks are cut into effective lenses. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a mold with efficient cavity switching, a lens blank and a production method thereof.

[0006] The present invention is implemented as follows: a method for manufacturing a lens using a mold with an efficient switching cavity comprises:

[0007] S101: Raw material preparation: according to the different performance of the lens, prepare raw materials with different refractive indices, such as colorants, antioxidants, etc.

[0008] S102: Mold assembly: select a mold with an efficient switching cavity and a die-cut hole that meets the shape requirements according to the production process, fix the mold with the efficient switching cavity on the upper end of the working plate through a mold clamp, assemble and splice the mold to ensure good air tightness inside the mold.

[0009] S103: Injection molding: the prepared raw materials are fed into the injection molding machine, heated and melted by the internal equipment of the injection molding machine, and injected into the mold;

[0010] S104: cooling treatment, after the mold is cooled, the lens blank in the mold is solidified and formed;

[0011] S105: demoulding, using the built-in ejector pin of the mold to separate the lens from the mold, cleaning the surface of the lens, and recycling the mold.

[0012] S106: Surface treatment: After drying the surface, add surface treatment solution to strengthen the surface to meet the strength requirements.

[0013] Another object of the present invention is to provide a mold for efficiently switching cavities, wherein the mold for efficiently switching cavities is provided with an upper mold base and a lower mold base;

[0014] an upper mold base and a lower mold base;

[0015] A film pressing platform is arranged in the middle of the upper mold base, and a mold bearing platform is arranged on the lower mold base;

[0016] A plurality of working plates are arranged in the middle of the mold-bearing platform, and a plurality of docking plates corresponding to the working plates are arranged at the lower end of the film pressing platform;

[0017] The upper mold base and the lower mold base are both provided with a plurality of opposing working columns;

[0018] A mold fixture is installed on the upper surface of the working disk, a mold of a high-efficiency switching cavity is sandwiched in the middle of the mold fixture, and a die-cutting hole of any shape is opened on the inner side of the mold of the high-efficiency switching cavity.

[0019] Furthermore, the upper mold base and the lower mold base are both provided with relative fixing holes, and the upper mold base and the lower mold base are connected by fixing columns passing through the fixing holes.

[0020] Furthermore, film compression springs are provided at both ends of the lower mold base.

[0021] Furthermore, guide rods are provided on both the upper mold base and the lower mold base.

[0022] Furthermore, a square lens blank frame is installed on the working plate, a positioning structure is provided on the square lens blank frame, and a positioning buckle is provided on the positioning structure.

[0023] Furthermore, a circular lens blank mold frame is installed in the working plate, and the lens blank mold frame is located in the middle of the die-cutting hole of the mold of the efficient switching cavity.

[0024] Another object of the present invention is to provide a lens blank, the outer contour shape of which is between a square lens blank frame and a regular or irregular pattern lens blank frame designed according to requirements, and the outer contour shape of the lens blank is an arbitrary shape.

[0025] Combining all the above technical solutions, the advantages and positive effects of the present invention are as follows:

[0026] The present invention can meet people's pursuit of diversified lens appearance forms on the basis of ensuring lens performance by selecting a mold with an efficient switching cavity having a die-cut hole that meets the shape requirements. The die-cut hole of the mold with the efficient switching cavity can be set to any shape, so that lens blanks of any shape can be obtained, which changes the disadvantages of traditional lenses with a single form and simple structure, and makes the lenses have diversified appearance shapes and more beautiful and diverse structural forms. At the same time, it saves more materials when cutting effective lenses from lens blanks. The present invention can change the appearance shape and size of the lens blank by switching the lens blank frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of the lens manufacturing method provided by an embodiment of the present invention.

[0028] Figure 2 It is a front view of a mold for efficient cavity switching provided by an embodiment of the present invention.

[0029] Figure 3 It is a rear view of a mold for efficient cavity switching provided by an embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of the structure of the upper mold base provided in an embodiment of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the lower mold base provided in an embodiment of the present invention.

[0032] Figure 6 It is a schematic diagram of the mold structure for efficient cavity switching provided by an embodiment of the present invention.

[0033] Figure 7 It is a schematic diagram of the square lens blank frame structure provided by an embodiment of the present invention.

[0034] Figure 8 It is a side view of a square lens blank frame provided by an embodiment of the present invention.

[0035] Fig. 9 It is a schematic structural diagram of a square lens blank frame and an irregular pattern lens blank frame provided in an embodiment of the present invention.

[0036] The figure shows: 1. upper mold base; 2. lower mold base; 3. square lens blank frame; 4. mold support table; 5. film pressing table; 6. fixing column; 7. fixing hole; 8. working plate; 9. guide rod; 10. positioning structure; 11. positioning buckle; 12. working column; 13. film pressing spring; 14. docking plate; 15. lens blank frame; 16. mold fixture; 17. efficient switching cavity mold; 18. die cutting hole. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] In view of the problems existing in the prior art, the present invention provides a mold with efficient cavity switching, a lens blank and a production method thereof. The present invention is described in detail below in conjunction with the accompanying drawings.

[0039] like Figure 1 As shown, the present invention provides a mold with efficient cavity switching, a lens blank and a production method thereof, and the lens production method is as follows:

[0040] S101: Raw material preparation: according to the different performance of the lens, prepare the raw materials with different refractive indices, such as toners and antioxidants;

[0041] S102: Mold assembly: select a mold with an efficient switching cavity and a die-cut hole that meets the shape requirements according to the production process, fix the mold with the efficient switching cavity on the upper end of the working plate through a mold fixture, assemble and splice the mold to ensure good air tightness inside the mold;

[0042] S103: Injection molding: the prepared raw materials are fed into the injection molding machine, heated and melted by the internal equipment of the injection molding machine, and injected into the mold;

[0043] S104: cooling treatment, after the mold is cooled, the lens blank in the mold is solidified and formed;

[0044] S105: demoulding, using the built-in ejector pin of the mold to separate the lens from the mold, cleaning the surface of the lens, and recovering the mold;

[0045] S106: Surface treatment: After drying the surface, add surface treatment solution to strengthen the surface to meet the strength requirements.

[0046] like Figure 2~Figure 8 As shown, the mold for efficient cavity switching provided by the embodiment of the present invention is provided with an upper mold base 1 and a lower mold base 2; a film pressing table 5 is provided in the middle of the upper mold base 1, and a mold receiving table 4 is provided on the lower mold base 2; a plurality of working disks 8 are provided in the middle of the mold receiving table 4, and a plurality of docking disks 14 corresponding to the working disks 8 are provided at the lower end of the film pressing table 5; the upper mold base 1 and the lower mold base 2 are both provided with a plurality of relative working columns 12; a mold fixture 16 is installed on the upper end surface of the working disk 8, and an efficient cavity switching mold 17 is sandwiched in the middle of the mold fixture 16, and a die-cutting hole 18 of any shape is opened on the inner side of the efficient cavity switching mold 17.

[0047] The upper mold base 1 and the lower mold base 2 in the embodiment of the present invention are both provided with opposite fixing holes 7 , and the upper mold base 1 and the lower mold base 2 are connected via fixing columns 6 passing through the fixing holes 7 .

[0048] In the embodiment of the present invention, the number of the working plates 8 corresponds to that of the docking plates 14, and four are provided.

[0049] In the embodiment of the present invention, both the upper mold base 1 and the lower mold base 2 are provided with guide rods 9 .

[0050] A film pressing spring 13 is provided inside the lower mold base 2 in the embodiment of the present invention.

[0051] A square lens blank mold frame 3 is fixed to the upper end of the working plate 8 in the embodiment of the present invention by a buckle, and the square lens blank mold frame 3 is located on the upper side of the high-efficiency switching cavity mold 17. A positioning structure 10 is provided on the square lens blank mold frame 3, and a positioning buckle 11 is provided on the positioning structure 10. A circular lens blank mold frame is installed in the working plate, and the lens blank mold frame is located in the middle of the die-cutting hole of the high-efficiency switching cavity mold.

[0052] The mold provided by the embodiment of the present invention can be used to injection mold lens blanks of any shape.

[0053] like Fig. 9 As shown, as an embodiment of the present invention, the maximum value of the outer contour of the lens blank is a square, and the minimum value of the outer contour of the lens is the intersection of a concentric rectangle (the length is equal to the side length of the square, and the width is half the side length of the square) and a concentric circle (the diameter is equal to the side length of the square).

[0054] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0055] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for producing a lens blank, characterized in that: The production method of the lens blank comprises: S101: Raw material preparation: according to the different performance of lenses, raw materials with different refractive indices are prepared, including colorants and antioxidants; S102: mold assembly, selecting a mold with a high-efficiency switching cavity having a die-cut hole that meets the shape requirements according to the production process, fixing the mold with the high-efficiency switching cavity on the upper end of the working plate through a mold fixture, and assembling and splicing the mold; S103: Injection molding: the prepared raw materials are fed into the injection molding machine, heated and melted by the internal equipment of the injection molding machine, and injected into the mold; S104: cooling treatment, after the mold is cooled, the lens blank in the mold is solidified and formed; S105: demoulding, using the built-in ejector pin of the mold to separate the lens from the mold, cleaning the surface of the lens, and recovering the mold; S106: Surface treatment: after drying the surface, add surface treatment solution to strengthen the surface to meet the strength requirements; The mold for efficiently switching the cavity used in the production method of the lens blank is provided with: an upper mold base and a lower mold base; A film pressing platform is arranged in the middle of the upper mold base, and a mold bearing platform is arranged on the lower mold base; A plurality of working plates are arranged in the middle of the mold-bearing platform, and a plurality of docking plates corresponding to the working plates are arranged at the lower end of the film pressing platform; The upper mold base and the lower mold base are both provided with a plurality of opposing working columns; A mold fixture is installed on the upper surface of the working disk, a mold of a high-efficiency switching cavity is sandwiched in the middle of the mold fixture, and a die-cutting hole of any shape is opened on the inner side of the mold of the high-efficiency switching cavity.

2. The method for producing a lens blank according to claim 1, characterized in that: The upper mold base and the lower mold base are both provided with relative fixing holes, and the upper mold base and the lower mold base are connected by fixing columns penetrating the fixing holes.

3. The method for producing a lens blank according to claim 1, characterized in that: Film pressing springs are arranged at both ends of the lower mold base.

4. The method for producing a lens blank according to claim 1, characterized in that: The upper mold base and the lower mold base are both provided with guide rods.

5. The method for producing a lens blank according to claim 1, characterized in that: A square lens blank frame is fixed to the upper end of the working plate by a buckle. The square lens blank frame is located on the upper side of the mold of the efficient switching cavity. A positioning structure is provided on the square lens blank frame, and a positioning buckle is provided on the positioning structure.

6. The method for producing a lens blank according to claim 1, characterized in that: A circular lens blank mold frame is installed in the working disk, and the lens blank mold frame is located in the middle of the die cutting hole of the mold with efficient switching cavity.

7. A lens blank produced by the method for producing a lens blank according to any one of claims 1 to 6, characterized in that: The outer contour shape of the lens blank is between a square lens blank frame and a regular or irregular pattern lens blank frame designed according to requirements, and the outer contour shape of the lens blank is an arbitrary shape.

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