CN108297350A

CN108297350A - Optics injection mold

Info

Publication number: CN108297350A
Application number: CN201711446012.7A
Authority: CN
Inventors: 于冠华; 马春保
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2018-07-20

Abstract

The present invention provides a kind of optics injection mold, including mode and the thimble that is arranged in mode, thin walled cylinder body is additionally provided in mode, thimble limit moves up and down in thin walled cylinder body；Wherein, height of the height of thin walled cylinder body not less than the molding position of mode；The end set that the molding position of mode is higher by thin walled cylinder body has chamfering.The problems such as capable of solving optical articles flash, product bias using foregoing invention, eject from shape, and improve the precision of optical articles overall dimensions and behavior tolerance.

Description

Optical injection mold

Technical Field

The invention relates to the technical field of optical product molding, in particular to a high-precision optical injection mold.

Background

Optical lenses are widely used in the optical field because of their excellent light transmittance, good dispersion, excellent moldability, light weight, low thermal conductivity, good fog resistance, and the like. In the field with higher imaging requirements, such as mobile phones, vehicle-mounted lenses, etc., in order to ensure the excellent imaging effect of the product, the whole lens module part has high appearance requirements and must be strictly controlled in precision, and in order to reduce the accumulated error, a single lens part must have strict dimension and form and position tolerance before assembly, which also puts higher requirements on the molding processing of the lens.

At present, in order to avoid the occurrence of corresponding defects during the molding and ejection of the optical lens, there are two types of ejection methods for a general optical lens: firstly, the mold core is ejected, and secondly, the thimble is ejected; the ejector pin ejection scheme has better control capability on product defects such as ejection release and eccentricity of a product, and a boss for preventing burrs of a bearing surface is usually designed on a mold core for preventing the burrs of the product.

Specifically, fig. 1 shows a partial structure of a conventional optical injection mold, and fig. 2 shows an enlargement mechanism of a portion a in fig. 1. As shown in fig. 1 and 2, although a conventional optical injection mold has a protrusion for preventing burrs on a bearing surface on a mold core 1 ', when a ejected part is formed for a long time by an ejector pin 3' due to nickel plating of the mold core 1 ', a nickel layer 4' at an opening of the mold core ejector pin has a nickel drop phenomenon (as shown in fig. 2), which causes defects such as material shortage at a forming position of the mold core 1 ', excessive glue in a formed product, severe burrs at the ejector pin 3', low yield endurance rate, and excessive mold repair cost.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide an optical injection mold, so as to solve the problems of poor molding quality, low product yield, high repair cost, and the like of the existing optical injection mold.

The invention provides an optical injection mold, which comprises a mold core and an ejector pin arranged in the mold core, wherein a thin-wall sleeve is also arranged in the mold core, and the ejector pin is limited in the thin-wall sleeve to move up and down; wherein, the height of the thin-wall sleeve is not less than the height of the molding position of the mold core; and a chamfer is arranged at the end part of the thin-wall sleeve higher than the molding position of the mold core.

In addition, it is preferable that the thin-walled sleeve is interference-fitted into the mold core.

In addition, the preferable scheme is that a nickel layer is arranged at the molding position of the mold core, and the nickel layer is arranged avoiding the thin-wall sleeve.

In addition, preferably, when the thimble moves in the thin-wall sleeve, the thimble and the nickel layer are isolated by the thin-wall sleeve.

In addition, the preferable scheme is that a sinking platform is arranged at one end of the die core, which is far away from the forming position of the die core, and a hanging platform is arranged at the position of the thin-wall sleeve, which corresponds to the sinking platform; the thin-wall sleeve and the die core are mutually limited through the hanging table and the sinking table.

In addition, the preferable scheme is that the mold core is of a cylindrical structure; and four thin-wall sleeves are uniformly distributed in the mold core, and an ejector pin is arranged in each thin-wall sleeve.

Utilize above-mentioned optics injection mold, saved among the current injection mold with mould benevolence integrative prevent deckle edge boss, keep apart mould benevolence and thimble through setting up the thin wall sleeve, make the face of leaning on of product possess better depth of parallelism and plane degree, accumulation error when reducing the product equipment greatly also can prolong the mould shaping maintenance cycle simultaneously, improves production efficiency and production quality.

To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

FIG. 1 is a schematic view of a partial structure of a conventional optical injection mold;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of a partial structure of an optical injection mold according to an embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

FIG. 5 is a schematic view of a thin-walled sleeve according to an embodiment of the invention;

FIG. 6 is a schematic view of a mold core according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a mold core according to an embodiment of the invention.

Wherein the reference numerals include: the die core comprises a die core 1 ', an ejector pin 3 ', a nickel layer 4 ', the die core 1, a forming position 11, a sinking table 12, a thin-wall sleeve 2, a chamfer 21, a hanging table 22, an ejector pin 3 and a nickel layer 4.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

For a detailed description of the optical injection mold structure of the present invention, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 3 illustrates a partial structure of an optical injection mold according to an embodiment of the present invention; fig. 4 shows an enlarged structure of a portion B in fig. 3.

Referring to fig. 3 and 4 together, the optical injection mold according to the embodiment of the present invention includes a mold core 1 and an ejector pin 3 disposed in the mold core 1, wherein the mold core 1 is further provided with a thin-walled sleeve 2, the ejector pin 3 is limited in the thin-walled sleeve 2 to reciprocate up and down, that is, the thin-walled sleeve 2 is disposed between the mold core 1 and the ejector pin 3; wherein, the height of the thin-wall sleeve 2 is not less than the height of the molding position 11 of the mold core 1, so as to avoid the contact friction between the thimble 3 and the molding position 11 of the mold core 1; in addition, a chamfer 21 is arranged at the end part of the thin-wall sleeve 2 higher than the molding position 11 of the die core 1, so that the product can be conveniently ejected.

Specifically, FIG. 5 illustrates a thin-walled sleeve structure according to an embodiment of the present invention; fig. 6 and 7 illustrate partial structures of a mold core according to an embodiment of the invention from different angles, respectively.

Referring to fig. 3 to 7, the thin-walled sleeve 2 according to the embodiment of the present invention is a cylindrical barrel structure, a protruding cylindrical hanging table 22 is disposed at one end of the thin-walled sleeve 2, a sinking table 12 corresponding to the hanging table 22 is disposed at one end of the mold core 1 away from the molding position 11 of the mold core 1, and the thin-walled sleeve 2 and the mold core 1 are mutually fixed in a limiting manner by the hanging table 22 and the sinking table 12.

In order to ensure the positioning accuracy of the thin-wall sleeve 2 in the mold core 1 and prevent the thin-wall sleeve 2 from moving in the mold core 1, the thin-wall sleeve 2 can be assembled in the mold core 1 in an interference manner, and when the thimble 3 moves in the thin-wall sleeve 2, the thimble 3 is isolated from the nickel layer 4 by the thin-wall sleeve 2.

In an embodiment of the invention, the forming position 11 of the mold core 1 is further provided with a nickel layer 4, and the thin-wall sleeve 2 is higher than the forming position 11, so that the nickel layer 4 is avoided from the thin-wall sleeve 2 and is arranged around the thin-wall sleeve 2, and the nickel layer 4 can be isolated from the nickel layer 4 when the thimble 3 reciprocates, thereby effectively preventing the nickel layer 4 from falling off and achieving the purpose of ensuring the forming quality of a product.

It should be noted that, when optical products of different types or different production requirements are molded, the height of the thin-wall sleeve 2 above the molding position 11 of the mold core 1 can be adjusted, so as to ensure that the thimble 3 and the nickel layer 4 are isolated from each other.

In another embodiment of the present invention, the mold core 1 is a cylindrical structure, four thin-walled sleeves 2 are uniformly distributed in the mold core 1, an ejector pin 3 is disposed in each thin-walled sleeve 2, and a product at the molding position 11 is ejected out through the four ejector pins 3 simultaneously.

According to the optical injection mold, the problems of burr, product eccentricity, ejection and release of an imaging optical product and the like are simply and effectively solved, the precision of the overall size and action tolerance of the product can be improved, the structure of the injection mold can be simplified (compared with a mold core ejection mode), the product processing technology is optimized, the processing period is shortened, the production cost is saved, and a new direction and thought are provided for solving the related optical injection molding problems.

The optical injection mold according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the optical injection mold of the present invention described above without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.

Claims

1. An optical injection mold comprises a mold core and an ejector pin arranged in the mold core, and is characterized in that a thin-wall sleeve is further arranged in the mold core, and the ejector pin is limited in the thin-wall sleeve to move up and down; wherein,

the height of the thin-wall sleeve is not less than that of the molding position of the mold core;

and a chamfer is arranged at the end part of the thin-wall sleeve higher than the molding position of the mold core.

2. The optical injection mold of claim 1,

the thin-wall sleeve is assembled in the mold core in an interference fit mode.

3. The optical injection mold of claim 1,

and a nickel layer is arranged at the molding position of the mold core and is arranged to avoid the thin-wall sleeve.

4. The optical injection mold of claim 3,

when the ejector pin moves in the thin-wall sleeve, the ejector pin is isolated from the nickel layer through the thin-wall sleeve.

5. The optical injection mold of claim 1,

a sinking table is arranged at one end of the die core, which is far away from the forming position of the die core, and a hanging table is arranged at the position of the thin-wall sleeve, which corresponds to the sinking table;

the thin-wall sleeve and the die core are mutually limited through the hanging table and the sinking table.

6. The optical injection mold of claim 1,

the die core is of a cylindrical structure; and,

four thin-wall sleeves are uniformly distributed in the mold core, and an ejector pin is arranged in each thin-wall sleeve.