CN111136868A

CN111136868A - Plastic injection molding mold structure for optical lens

Info

Publication number: CN111136868A
Application number: CN201811302337.2A
Authority: CN
Inventors: 王江全
Original assignee: Jun He Technology Co Ltd
Current assignee: Jun He Technology Co Ltd
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2020-05-12
Anticipated expiration: 2038-11-02
Also published as: CN111136868B

Abstract

The invention discloses a plastic injection molding die structure of an optical lens, which comprises: a die set, at least one first die core, at least one lining and at least one second die core, wherein the upper seat body and the lower seat body of the die set are mutually locked and fixed by a matching surface, the matching surface of the locked upper seat body and the locked lower seat body is processed to ensure that the upper seat body and the lower seat body are correspondingly formed with at least one true round hole, the first die core is inserted into the true circular hole of the upper seat body by a round rod section, and the true circular pipe of the lining and the true circular rod of the second die core are inserted into the true circular hole of the lower seat body in a close contact state, therefore, the transverse cross section concentric circle correction of the true round hole, the round rod section, the true round pipe and the true round rod of the upper base body and the lower base body can be realized, so that the plane die cavity of the bush and the central points of the arc die cavities of the first die core and the second die core are stably kept on the same axis, and the die with high precision and quality is provided, thereby achieving the practical effects of high-precision manufacturing and fast die assembly.

Description

Plastic injection molding mold structure for optical lens

Technical Field

The present invention relates to a mold for lens, and more particularly to a mold structure for plastic injection molding of optical lens with high precision and fast assembly.

Background

The lens of the known camera or mobile phone is assembled with a plurality of lenses with different cambered surfaces, and the lenses have two design keys that are the same although the cambered surfaces are different, one of the lenses is that the periphery of the lens is provided with an outer ring, the lenses can be fixed on a frame of the lens by utilizing the outer ring, so that the lenses can be kept on the same central shaft, and the other is that the central point of the mirror surface radian of the lenses and the central point of the circumference of the outer ring must be kept on the same central shaft, thereby achieving the effect of center calibration during assembly, therefore, when the central points of the outer ring and the mirror surface radian are not on the same central shaft, the lenses are defective products, the lenses are tiny light-transmitting sheet bodies, so the requirement on the precision of the size and the mirror surface radian is quite high, the die further comprises an upper die seat and a lower die seat which are provided with an upper die seat and a lower die seat which are respectively penetrated in the corresponding die cores, the present invention relates to a lens forming device, and more particularly to a lens forming device, which includes a mold core, a bushing, a center point, a positioning pin, a positioning.

In view of the above, the present inventors have made various experiments on the manufacturing, development and design of related products for many years, and have made detailed design and careful evaluation to achieve the above objectives, and finally have a practical invention.

Disclosure of Invention

The present invention provides a mold structure for injection molding of plastic for optical lens, which aims to solve the above-mentioned drawbacks of the prior art.

The invention provides a plastic injection molding die structure of an optical lens, which comprises: a die set, the die set includes an upper seat and a lower seat, and the upper seat and the lower seat are mutually locked and fixed by a matching surface, the matching surface of the upper seat and the lower seat after being processed and penetrated through is processed to ensure that at least one true round hole is correspondingly formed on the upper seat and the lower seat, so that the true round hole of the upper seat and the true round hole of the lower seat can keep the same axle center during subsequent processing and assembling, and one end of the true round hole of the lower seat adjacent to the matching surface of the lower seat is concavely provided with an expanded hole; the end surface of the round rod section of the first mold core is provided with an arc mold cavity at the position of the involution surface of the upper seat body; at least one bush, the outer edge of one end of the bush forms a group of setting parts, and the outer edge of the other end of the bush forms a true round pipe, the bush is fixed at the enlarged hole of the lower seat body by the group setting parts, and the true round pipe is inserted into the true round hole of the lower seat body, so that the true round pipe and the true round hole of the lower seat body form a transverse section concentric circle in a close contact state, the bush penetrates through a through hole, a plane die cavity is formed at the opening position of the through hole of the bush at one end of the group setting parts, a true round side wall is formed at the outer edge of the plane die cavity, and the true round side wall and the true round pipe form a transverse section concentric circle; the second mold core is provided with a true round rod, the second mold core is inserted into the true round hole of the lower base body through the true round rod, the true round rod is in close contact with the true round hole of the lower base body, the true round rod and the true round hole of the lower base body form a transverse cross section concentric circle state, an arc mold cavity is formed on the end surface of the true round rod of the second mold core at the position of the plane mold cavity, the arc mold cavity of the first mold core and the arc mold cavity of the second mold core are mutually closed, and the arc center of the arc mold cavity of the first mold core and the arc center of the arc mold cavity of the second mold core and the transverse cross section center of the true round side wall are positioned on the same axis through the correction of the true round holes of the upper base body and the correction of the true round holes of the lower base body.

As another embodiment of the present invention, a material injection flow channel is formed on the joining surface of the locked upper and lower base bodies, and the material injection flow channel is communicated with a mold cavity space defined by the planar mold cavity and the circular mold cavities of the first and second mold cores.

As another implementation of the present invention, the bushing has a flat surface formed on the assembling portion, and the flat surface is used for abutting against the lower seat to form a position correction of the material injection flow channel.

In another embodiment of the present invention, the bushing and the lower seat are locked and fixed by at least one bolt.

As another implementation of the present invention, a communicating and narrowing edge opening is formed between the cavity space and the material injection flow channel, and the edge opening provides a cutting position for forming the lens.

The invention has the advantages that the first die core is inserted into the true round hole of the upper seat body by the round rod section, and the true round pipe of the bush and the true round rod of the second die core are inserted into the true round hole of the lower seat body in a close contact state, so that the center point of the plane die cavity and the arc centers of the arc die cavities of the first die core and the second die core can be stably maintained on the same axis by the concentric circle correction of the true round holes, the round rod section, the true round pipe and the true round rods of the upper seat body and the lower seat body, thereby providing a die with high precision and quality and achieving the practical efficacy of manufacturing and quickly assembling the die with high precision.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention.

FIG. 2 is an enlarged partial view of the invention shown in FIG. 1.

Fig. 3 is a schematic top view of the present invention.

FIG. 4 is a schematic diagram of the injection process of the present invention.

FIG. 5 is a schematic diagram illustrating the operation of the present invention in taking a lens.

Fig. 6 is a schematic view of a die set in the present invention.

Fig. 7 is a sectional view of a die set in the present invention.

Symbolic illustration in the drawings:

10, a die set; 11 an upper seat body; 111. 121 mating surfaces; 112. 122 a true circular hole; 12 a lower seat body; 123 enlarged holes; 13, bolts; 14, a material injection runner; 20 a first mold core; 21 a round bar segment; 22 arc mould cavity; 30, a bushing; 31 sets of setting parts; 32 true round tubes; 33 a through hole; 34 a planar cavity; 341 true circular edge walls; 35 edge ports; 36, a flat surface; 40 a second mold core; 41 true round bar; 42 arc mold cavity; and (A) lens.

Detailed Description

For a better understanding and appreciation of the objects, features, and advantages of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

as shown in fig. 1 to 5, the present invention provides a mold structure for plastic injection molding of an optical lens, comprising: a mold assembly 10, at least one first mold core 20, at least one bushing 30 and at least one second mold core 40; the mold set 10 includes an upper seat 11 and a lower seat 12, the upper seat 11 and the lower seat 12 are fixed by a mating surface, the

mating surfaces

111, 121 of the upper and

lower seats

11, 12 after being locked are processed to make the upper and

lower seats

11, 12 correspondingly form at least one

true round hole

112, 122, so that the true round hole 112 of the upper seat 11 and the true round hole 122 of the lower seat 12 can keep the same axis during subsequent processing and assembling, and an enlarged hole 123 is concavely arranged at one end of the true round hole 122 of the lower seat 12 adjacent to the mating surface 121 of the lower seat 12; the first mold core 20 is formed with a round rod section 21, the round rod section 21 is fixed to the true round hole 112 of the upper seat 11 in a penetrating manner, and an arc mold cavity 22 is formed on the end surface of the round rod section 21 of the first mold core 20 at the position of the involution surface 111 of the upper seat 11; a set of installation parts 31 is formed on the outer edge of one end of the bushing 30, a true circular pipe 32 is formed on the outer edge of the other end of the bushing 30, the bushing 30 is fixed at the enlarged hole 123 of the lower seat 12 by the set of installation parts 31, the true circular pipe 32 is inserted into the true circular hole 122 of the lower seat 12, the bushing 30 and the lower seat 12 are locked and fixed by at least one bolt 13, the true circular pipe 32 and the true circular hole 122 of the lower seat 12 are in close contact to form a transverse cross-section concentric circle, a through hole 33 is penetrated through the bushing 30, a plane die cavity 34 is formed at the opening position of one end of the set part 31 of the through hole 33 of the bushing 30, a true circular side wall 341 is formed on the outer edge of the plane die cavity 34, and the true circular side wall 341 and the true circular pipe 32 form a transverse cross-section concentric circle; the locked

involutive surfaces

112, 122 of the upper and

lower seats

11, 12 form a material injection flow channel 14, and the material injection flow channel 14 is communicated with the plane mold cavity 34 and the mold cavity space formed by the circular

arc mold cavities

22, 42 of the first and

second mold cores

20, 40, a communicated and narrowed edge opening 35 is formed between the mold cavity space and the material injection flow channel 14, and the edge opening 35 provides the cutting position of the formed lens a, wherein the bush 30 forms a flat surface 36 on the assembling portion 31, and the flat surface 36 is used for abutting against the lower seat 12 to form the position correction of the material injection flow channel 14, thereby having the error-proof protection effect during assembly; the second mold core 40 is formed with a true circular rod 41, the second mold core 40 is inserted into the true circular hole 122 of the lower base 12 by the true circular rod 41, and the true circular rod 41 is in close contact with the true circular hole 122 of the lower base 12, and the true circular rod 41 and the true circular hole 122 of the lower base 12 form a horizontal cross section concentric circle state, the end surface of the true circular rod 41 of the second mold core 40 is formed with an arc mold cavity 42 at the position of the planar mold cavity 34 of the lower base 12, and the arc mold cavity 22 of the first mold core 20 and the arc mold cavity 42 of the second mold core 40 are mutually matched, and the arc center of the arc mold cavity 22 of the first mold core 20 and the arc center 341 of the second mold core 40 and the center of the horizontal cross section of the true circular side wall are on the same axis through the correction of the true

circular holes

112, 122 of the upper and

lower bases

11, 12.

As shown in fig. 1 to 7, when the mold set 10 of the present invention is manufactured, the upper seat 11 and the lower seat 12 are first assembled and locked together, so that the mating surface 111 of the upper seat 11 and the mating surface 121 of the lower seat 12 are aligned with each other, and at this time, the upper seat 11 and the lower seat 12 are simultaneously penetrated through to form at least one true circular hole with the same position and the same diameter corresponding to each other, and the true circular hole 112 of the upper seat 11 and the true circular hole 122 of the lower seat 12 are arranged in a ring shape, and the injection runner 14 and the expansion hole 123 are further processed on the upper seat 11 and the lower seat 12, so that the first mold insert 20, the bushing 30 and the second mold insert 40 are provided through the true circular hole 112 of the upper seat 11 and the true circular hole 122 of the lower seat 12, wherein the first mold insert 20 is fixed on the upper seat 11, the central point of the circular rod section 21 of the first mold core 20 and the circular hole 112 of the upper seat 11 are coaxially arranged, so that the central point of the circular arc mold cavity 22 of the first mold core 20 is located on the central axis of the circular hole 112 of the upper seat 11, the bushing 30 is installed at the enlarged hole 123 of the lower seat 12 by the assembling portion 31, so that the circular tube 32 of the bushing 30 can be inserted into the circular hole 122 of the lower seat 12 in a close contact state, so that the circular hole 122 of the lower seat 12 and the circular edge wall 341 of the bushing 30 form a concentric circular state with a transverse cross section, i.e. the central point of the circular edge wall 341 is located on the central axis of the circular hole 122 of the lower seat 12, the bushing 30 is locked and fixed to the lower seat 12 by the bolt 13, the second mold core 40 is inserted into the through hole 33 of the bushing 30, and the circular rod 41 of the second mold core 40 is inserted into the circular hole 122 of the lower seat 12 in a close contact state, the circular hole 122 of the lower base 12 and the circular rod 41 of the second mold core 40 form a concentric circular state with a transverse cross section, that is, the central lines of the two are on the same straight line, so that the center point of the planar mold cavity 34, the circular center of the circular mold cavity 22 of the first mold core 20 and the circular center of the circular mold cavity 42 of the second mold core 40 are stably maintained on the same axis by the alignment of the circular hole 112 of the upper base 11, the circular hole 122 of the lower base 12, the circular rod section 21, the circular tube 32 and the circular rod 41, thereby having the efficacy of high precision manufacturing and fast assembly, further facilitating the mold set 10 to be aligned to the optimum mold closing state, the upper base 11 and the lower base 12 form the circular mold cavity 22 of the first mold core 20 and the circular center of the circular mold cavity 42 of the second mold core 40, and then pouring is performed through the material pouring runner 14, thereby forming the lens a after mold division, and ejecting the lens a through the second mold core 40 to obtain a finished product, by means of the structure of the above embodiment, the following benefits can be obtained: the first mold insert 20 is inserted into the circular hole 112 of the upper seat 11 by the circular rod section 21, and the circular tube 32 of the bushing 30 and the circular rod 41 of the second mold insert 40 are inserted into the circular hole 122 of the lower seat 12 in a close contact state, so that the center point of the planar mold cavity 34, the circular center of the circular mold cavity 22 of the first mold insert 20 and the circular center of the circular mold cavity 42 of the second mold insert 40 are stably maintained on the same axis by aligning the circular holes 112 of the upper seat 11 and the circular holes 122 of the lower seat 12, the circular rod sections 21, the circular tubes 32 and the circular rods 41, thereby providing a high-precision mold and achieving a practical effect of manufacturing and quickly assembling the mold with high precision.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention; therefore, all the equivalent changes and modifications made according to the claims of the present invention should fall within the scope covered by the claims of the present invention.

Claims

1. an optical lens plastic injection molding mold structure, is characterized in that, comprises:

A mold set, the mold set includes an upper seat body and a lower seat body, and the upper seat body and the lower seat body are mutually locked and fixed with a pair of mating surfaces. The upper and lower bases are formed with at least one true round hole correspondingly, so that the true round hole of the upper seat and the true round hole of the lower seat maintain the same axis during subsequent processing and assembly. The true round hole of the lower seat body is concavely provided with an enlarged hole at one end adjacent to the abutting surface of the lower seat body;

At least one first mold core, the first mold core is formed with a circular rod segment, the circular rod segment is drilled through a true round hole fixed on the upper seat body, and the end face of the circular rod segment of the first mold core is on the upper seat body. A circular arc die cavity is formed at the position of the mating surface;

At least one bushing, the outer edge of one end of the bushing is formed with a set of setting parts, the outer edge of the other end of the bushing is formed with a true circular tube, and the bushing is fixed at the enlarged hole of the lower seat body by the set part , and insert the true round tube into the true round hole of the lower seat body, so that the true round tube and the true round hole of the lower seat body are in contact to form concentric circles in transverse cross-section, and the bushing runs through a through hole , and the through hole of the bushing is located at the opening position of one end of the assembly part to form a flat die cavity, the outer edge of the flat die cavity is formed with a true circular side wall, and the true circular side wall and the true circular tube form a transverse section concentric circles; and

At least one second mold core, the second mold core is formed with a true round rod, and the second mold core is inserted into the true round hole of the lower seat body with the true round rod, and makes the true round rod and the lower The true round hole of the seat body is in a contact state, and the true round rod and the true round hole of the lower seat body form a concentric state of transverse cross-section, and the end face of the true round rod of the second mold core is formed at the position of the plane mold cavity There is an arc mold cavity, and the arc mold cavity of the first mold core and the arc mold cavity of the second mold core are aligned with each other. The arc center of the circular-arc die cavity of the die core and the circular arc center of the circular-arc die cavity of the second die core are on the same axis as the center of the transverse section of the true circular side wall.

2 . The optical lens plastic injection molding mold structure according to claim 1 , wherein an injection flow channel is formed on the mating surfaces of the upper and lower bases after locking, and the injection flow channel is formed. 3 . It communicates with the mold cavity space enclosed by the plane mold cavity and the arc mold cavity of the first and second mold cores.

3 . The optical lens plastic injection molding mold structure according to claim 2 , wherein the bushing is formed with a flat surface on the assembly portion, and the flat surface is used to abut against the lower base to form the injection molding. 4 . Position correction of the material flow channel.

4 . The plastic injection molding mold structure of claim 1 , wherein the bush and the lower base are locked and fixed by at least one bolt. 5 .

5. The optical lens plastic injection molding mold structure according to claim 2, wherein a narrowed edge opening is formed between the cavity space and the material injection channel, and is formed by the cavity space and the material injection channel. The edge port provides a cut position for the formed lens.