CN217434884U

CN217434884U - Female mold insert structure for aspheric lens

Info

Publication number: CN217434884U
Application number: CN202220269758.5U
Authority: CN
Inventors: 孙连伟; 李文明; 章芬
Original assignee: Jiangxi Lianyi Optics Co Ltd
Current assignee: Jiangxi Lianyi Optics Co Ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-09-16
Anticipated expiration: 2032-02-10

Abstract

The utility model discloses a son structure is gone into to master model for aspheric lens, go into son including first female mould and the mother's mould of second, the center in the son is gone into to first female mould has set firmly the mother's mould of second and has gone into son coaxially, and the top that son and the mother's mould of second were gone into to first female mould is formed with the shaping recess with aspheric lens looks adaptation jointly, and first mother goes into son and the mother's mould of second and goes into to be equipped with the first exhaust passage and the second exhaust passage that are linked together respectively on the son, and first mother goes into son and the mother's mould of second and is equipped with the exhaust clearance that is linked together with first exhaust passage and second exhaust passage between the son's top. The utility model can form an exhaust channel on the female mold insert, so that the gas in the molding groove on the female mold insert can be discharged in time in the process of injection molding of the aspheric lens, thereby greatly improving the appearance quality of the molded aspheric surface part; meanwhile, the female mold insert adopts a split structure, so that the manufacturing cost of the injection molding mold of the aspheric lens can be reduced.

Description

Female mold insert structure for aspheric lens

Technical Field

The utility model belongs to the technical field of the lens is made, specifically relate to a son structure is gone into to master model for aspheric surface lens.

Background

Aspherical lenses have a radius of curvature that gradually increases from the center of the lens surface to the periphery, i.e., the center of the lens surface is higher and the periphery is gradually flatter. Compared with a spherical lens, the aspheric lens can greatly reduce aberration, improve image quality and has thinner and more beautiful appearance, so that the aspheric lens is more and more applied in the fields of optical lenses and the like.

In the prior art, as shown in fig. 1, a schematic structural diagram of an aspheric lens is shown, where an aspheric portion of the aspheric lens 10 has a large ratio, and a height h of a surface center of the aspheric portion relative to a parting surface 11 of the aspheric lens 10 is large, so that it is difficult to injection mold the aspheric portion of the aspheric lens. Fig. 2 is a schematic diagram of a structure of a female mold insert 20 for an aspheric lens in the prior art for the above aspheric lens, in which the female mold insert 20 is of an integral structure, that is, the female mold insert 20 is only made as an integral body on the female mold side with the parting surface 11 as a boundary according to the structural features of the aspheric lens 10. Because the depth H (H is slightly larger than H) of the top end of the female mold insert 20 relative to the lowest point of the groove of the molded aspheric surface part is larger, the gas in the groove of the molded aspheric surface part on the female mold insert 20 can not be discharged in time in the injection molding process of the aspheric surface lens 10, so that the appearance quality of the molded aspheric surface part is poor; meanwhile, the female mold insert 20 has an integral structure, which results in a high mold manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a substructure is gone into to master model for aspheric surface lens to improve the appearance quality of aspheric surface lens.

In order to solve the technical problem, the utility model provides a son structure is gone into to master model for aspheric lens, go into son and the mother's mould of second including first mother mould, the center coaxial in the son is gone into to first mother mould has set firmly the son is gone into to the mother's mould of second, the top that son and the mother's mould of second were gone into to first mother mould is formed with the shaping recess of non-spherical lens looks adaptation jointly, first mother mould goes into son and the mother's mould of second and goes into to be equipped with first exhaust passage and the second exhaust passage who is linked together respectively on the son, first mother mould go into between son and the mother's mould of second top be equipped with the exhaust clearance that first exhaust passage and second exhaust passage are linked together.

Furthermore, a first forming groove is formed in the center of the top of the first female die insert, a second forming groove is formed in the center of the top of the second female die insert, and the first forming groove and the second forming groove form the forming groove.

Furthermore, a second female mold insert mounting hole matched with the second female mold insert is formed in the center of the middle of the first female mold insert, and the bottom of the second female mold insert is in interference fit with the second female mold insert mounting hole of the first female mold insert.

Furthermore, a first cushion block is arranged at the center of the bottom in the first female mold insert, and a second female mold insert is fixedly arranged at the center of the top of the first cushion block.

Furthermore, the bottom of the second female die insert is symmetrically provided with first flat grooves, the center of the top of the first cushion block is provided with mounting grooves matched with the first flat grooves, the center of the bottom in the first female die insert is symmetrically provided with second flat grooves, and the outer side of the first cushion block is provided with notches matched with the second flat grooves.

Furthermore, the top end of the second female mold insert is lower than the bottom end of the first forming groove on the first female mold insert.

Compared with the prior art, the beneficial effects of the utility model are that: the first and second mother mold inserts are matched with each other, the top parts of the first and second mother mold inserts jointly form a molding groove matched with the aspheric lens, the first and second mother mold inserts are respectively provided with a first exhaust channel and a second exhaust channel which are communicated, and an exhaust gap communicated with the first and second exhaust channels is arranged between the top parts of the first and second mother mold inserts, so that the exhaust channel can be formed on the mother mold insert, gas in the molding groove on the mother mold insert can be timely exhausted in the injection molding process of the aspheric lens, and the appearance quality of the molded aspheric lens part can be greatly improved; meanwhile, the female mold insert adopts a split structure, so that the manufacturing cost of the injection molding mold of the aspheric lens can be reduced.

Drawings

FIG. 1 is a schematic diagram of an aspheric lens of the prior art;

FIG. 2 is a schematic diagram of a female mold insert for an aspheric lens in the prior art;

fig. 3 is a schematic view of a female mold insert structure for aspheric lenses according to the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is a schematic structural view of a first female mold insert in a female mold insert structure for aspheric lenses according to the present invention;

FIG. 6 is a cross-sectional view of a first pad of a female mold insert structure for aspheric lenses according to the present invention;

fig. 7 is a schematic view of a gas discharge path of the female mold insert substructure for an aspheric lens according to the present invention.

The reference numbers in the figures illustrate: 10-aspheric lens, 11-parting surface, 20-master mold insert, 30-first master mold insert, 31-first forming groove, 32-first exhaust channel, 33-second master mold insert mounting hole, 40-second master mold insert, 41-second forming groove, 42-second exhaust channel, 43-exhaust groove, 44-exhaust gap, 50-first cushion block, 51-mounting groove, 52-notch and 60-second cushion block.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 3 to 7, the present invention provides a female mold insert structure for aspheric lenses, which includes a first female mold insert 30, a second female mold insert 40 and a first cushion block 50. The first female mold insert 30 is installed in a female mold core (not shown), the second female mold insert 40 is installed in the center of the middle of the first female mold insert 30 and is coaxial with the first female mold insert 30, and the first cushion block 50 is installed in the center of the bottom of the first female mold insert 30 and is fixedly connected with the bottom of the second female mold insert 40.

Specifically, a first forming groove 31 is formed in the center of the top of the first female mold insert 30, and the first forming groove 31 is adapted to one side of the aspheric surface portion of the aspheric lens 10 close to the parting surface; a second female mold insert mounting hole 33 is formed in the center of the middle part of the first female mold insert 30, the second female mold insert mounting hole 33 is communicated with the first forming groove 31, and the second female mold insert mounting hole 33 is matched with the second female mold insert 40; a second flat notch groove (not marked in the figure) is symmetrically arranged at the bottom center in the first female die insert 30, the second flat notch groove is communicated with the second female die insert mounting hole 33, correspondingly, a notch is arranged at the corresponding position of the outer side of the first cushion block 50, and the notch is matched with the second flat notch groove so as to prevent the first cushion block 50 from rotating in the first female die insert 30; the center of the middle part in the first female mold insert 30 is also symmetrically provided with a first exhaust passage 32, and the first exhaust passage 32 is also communicated with a second female mold insert mounting hole 33.

Meanwhile, a second molding groove 41 is formed in the center of the top of the second female mold insert 40, the second molding groove 41 is adapted to a side of the aspheric surface portion of the aspheric lens 10 away from the parting surface, and the second molding groove 41 and the first molding groove 31 together form a molding groove (not shown) adapted to the aspheric surface portion of the aspheric lens 10; a second exhaust passage 42 is formed at the top of the second female mold insert 40, and the second exhaust passage 42 is communicated with the first exhaust passage 32; an exhaust gap 44 is arranged between the outer side of the top of the second female mold insert 40 and the inner side of the top of the second female mold insert mounting hole 33 on the first female mold insert 30, and the exhaust gap 44 is communicated with the first exhaust channel 32 and the second exhaust channel 42, so that gas in the forming groove can be exhausted in time through the exhaust gap 44 and the first exhaust channel 32 in sequence in the injection molding process of the aspheric lens 10; interference fit is realized between the outer side of the bottom of the second female die insert 40 and the inner side of the bottom of the second female die insert mounting hole 33, so that gas in the forming groove can be prevented from overflowing from the bottom of the second female die insert mounting hole 33, the problem of eccentricity of a finished product of an aspheric lens can be prevented, and the appearance quality of the product can be improved.

Preferably, for the convenience of processing, shallow notches are symmetrically milled on the outer side of the top of the second female mold insert 40, so as to form the exhaust gap 44 between the outer side of the top of the second female mold insert 40 and the inner side of the top of the second female mold insert mounting hole 33 on the first female mold insert 30; meanwhile, in order to exhaust smoothly and prevent air leakage or air blockage, the outer side of the top of the second female mold insert 40 is also symmetrically provided with exhaust grooves 43, the exhaust grooves 43 are communicated with the second exhaust channel 42, and the caliber of the exhaust grooves 43 is larger than that of the second exhaust channel 42.

Furthermore, the center of the top of the first spacer 50 is provided with a mounting groove 51, and correspondingly, a first flat groove (not shown) is symmetrically arranged at a corresponding position of the bottom of the second female mold insert 40, and the first flat groove is matched with the mounting groove 51 so as to connect the bottom of the second female mold insert 40 with the top of the first spacer 50 and prevent the second female mold insert 40 from rotating on the first spacer 50.

In addition, in order to improve the strength and the service life of the second female mold insert 40, the top end of the second female mold insert 40 is lower than the bottom end of the first forming groove 31 on the first female mold insert 30, and the top end of the second female mold insert 40 is higher than the R angle of the aspheric surface part on the aspheric surface lens 10, so that the rise of the aspheric surface part of the aspheric surface lens 10 can be corrected by adjusting the height of the second cushion block 304, the appearance quality of the product is improved, and the mold manufacturing cost is saved.

In practical application, the second female mold insert 40 and the first cushion block 50 are sequentially installed in the first female mold insert 30, and then the first female mold insert 30, the second female mold insert 40 and the first cushion block 50 are integrally installed on the second cushion block 60 on the female mold core through bolts.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. A female mold insert substructure for aspheric lenses, comprising: the spherical lens forming mold comprises a first female mold insert (30) and a second female mold insert (40), wherein the second female mold insert (40) is fixedly arranged in the center of the first female mold insert (30) coaxially, forming grooves matched with spherical lenses are formed in the tops of the first female mold insert (30) and the second female mold insert (40) together, a first exhaust channel (32) and a second exhaust channel (42) communicated with each other are respectively arranged on the first female mold insert (30) and the second female mold insert (40), and an exhaust gap (44) communicated with the first exhaust channel (32) and the second exhaust channel (42) is arranged between the tops of the first female mold insert (30) and the second female mold insert (40).

2. A master mold sub-structure for an aspheric lens as in claim 1, characterized in that: the first female die insert (30) is provided with a first forming groove (31) in the center of the top, the second female die insert (40) is provided with a second forming groove (41) in the center of the top, and the first forming groove (31) and the second forming groove (41) form the forming groove.

3. A master mold sub-structure for an aspheric lens as in claim 1, characterized in that: and a second female die insert mounting hole (33) matched with the second female die insert (40) is formed in the center of the middle part in the first female die insert (30), and the bottom of the second female die insert (40) is in interference fit with the second female die insert mounting hole (33) of the first female die insert (30).

4. A master mold sub-structure for an aspheric lens as in claim 2 or 3, characterized in that: the center of the bottom in the first female mold insert (30) is provided with a first cushion block (50), and the center of the top of the first cushion block (50) is fixedly provided with a second female mold insert (40).

5. A master mold sub-structure for an aspheric lens as in claim 4, characterized in that: the bottom of the second female die insert (40) is symmetrically provided with a first flat slot, the top center of the first cushion block (50) is provided with a mounting groove (51) matched with the first flat slot, the bottom center of the first female die insert (30) is symmetrically provided with a second flat slot, and the outer side of the first cushion block (50) is provided with a notch (52) matched with the second flat slot.

6. A master mold sub-structure for an aspheric lens as in claim 2 or 3, characterized in that: the top end of the second female die insert (40) is lower than the bottom end of the first forming groove (31) on the first female die insert (30).