CN216760679U

CN216760679U - Lens forming die

Info

Publication number: CN216760679U
Application number: CN202220340788.0U
Authority: CN
Inventors: 余建兵; 余军兵; 张光明
Original assignee: Xiamen Yongjiajun Precision Mould Co ltd
Current assignee: Xiamen Yongjiajun Precision Mould Co ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-06-17
Anticipated expiration: 2032-02-21

Abstract

The utility model provides a lens forming mold, which comprises a top mold and a bottom mold, wherein when the top mold and the bottom mold are closed, at least one mold cavity is formed in the top mold and the bottom mold; the mold cavity of the bottom mold is provided with a plurality of through holes, the bottom mold is provided with a plurality of locking bolts, and one ends of the locking bolts penetrate through the through holes and are arranged on the mold core of the bottom mold; a first exhaust gap is formed between the die core of the bottom die and the die cavity, a second exhaust gap is formed between the locking bolt and the through hole, and the first exhaust gap and the second exhaust gap are communicated. In the model chamber, set up first exhaust clearance between mould benevolence and model chamber for first exhaust clearance is located the marginal position of mould, dodges first exhaust clearance and the surperficial formation of lens, reaches to carry out injection moulding to the lens surface after, can keep lens surface level and smooth, can not cause the problem of overlap or the vestige of moulding plastics because of the gas pocket, improves lens injection moulding's quality.

Description

Lens forming die

Technical Field

The utility model relates to the field of mold structures, in particular to a lens forming mold.

Background

The die is various dies and tools for obtaining required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. Specifically, the die has a specific contour or cavity shape, and the blank can be separated (punched) according to the contour shape by applying the contour shape with the cutting edge. The blank can obtain a corresponding three-dimensional shape by using the shape of the inner cavity. The mold generally comprises a movable mold and a fixed mold (or a male mold and a female mold), which can be separated or combined. When the blank is closed, the blank is injected into the die cavity for forming. The die is a precise tool, has a complex shape, bears the expansion force of a blank, has higher requirements on structural strength, rigidity, surface hardness, surface roughness and processing precision, and the development level of die production is one of important marks of the mechanical manufacturing level.

In the production of the existing lens mold, the exhaust system problem of the mold is easy to cause incomplete exhaust during injection molding, which affects the quality of the lens and further increases the production cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lens forming mold, aiming at solving the problem that the production quality is poor when the existing mold is used for producing lenses.

The utility model is realized by the following steps: the forming die for the lens comprises a top die and a bottom die, wherein when the top die and the bottom die are matched, at least one die cavity is formed in the top die and the bottom die; the die cavity of the bottom die is provided with a plurality of through holes, the bottom die is provided with a plurality of locking bolts, and one ends of the locking bolts penetrate through the through holes to be arranged on the die core of the bottom die;

the mould benevolence of die block with be provided with first exhaust clearance between the model chamber, the lock solid bolt with be provided with second exhaust clearance between the through-hole, first exhaust clearance with second exhaust clearance is linked together and sets up.

Preferably, the top surface of the die core of the bottom die facing the top die direction is provided with a honeycomb surface.

Preferably, the mould benevolence groove middle part orientation of die block the top mould direction extends and forms the arch, the honeycomb face sets up bellied surface, first exhaust clearance is located the arch with between the mould benevolence groove side of die block.

Preferably, the side surface of the die core of the top die, which faces the direction of the bottom die, is concave inwards to form an arc-shaped smooth surface.

Preferably, the width of the first exhaust gap is between 0.01mm and 0.02 mm.

Preferably, the width of the second exhaust gap is between 0.01mm and 0.05 mm.

The utility model has the beneficial effects that:

1. in the model cavity, set up first exhaust clearance between mould benevolence and model cavity for first exhaust clearance is located the marginal part of mould, forms the surface of first exhaust clearance and lens and dodges, reaches to carry out injection moulding to the lens surface after, can keep lens surface level and smooth, can not cause the problem of overlap or the vestige of moulding plastics because of the gas pocket, improves lens injection moulding's quality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a lens molding die according to an embodiment of the present invention;

FIG. 2 is a sectional view of a lens molding die according to an embodiment of the present invention;

FIG. 3 is an enlarged view of A in the circle marked in FIG. 2;

fig. 4 is a partial schematic view of a bottom mold insert of a lens molding mold according to an embodiment of the utility model;

fig. 5 is a partial view of a lens molding die according to an embodiment of the present invention.

Reference numerals:

10. carrying out top die; 101. a mold cavity; 102. an arc-shaped polished surface;

20. bottom die; 201. a through hole; 202. locking the bolt; 203. a first exhaust gap;

204. a second exhaust gap; 205. a protrusion;

2051. and (4) a honeycomb surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The first embodiment,

Referring to fig. 1, 2, 3, 4 and 5, the present embodiment provides a lens forming mold, including a top mold 10 and a bottom mold 20, wherein when the top mold 10 and the bottom mold 20 are closed, at least one mold cavity 101 is formed in the top mold 10 and the bottom mold 20; the mold cavity 101 of the bottom mold 20 is provided with a plurality of through holes 201, the bottom mold 20 is provided with a plurality of locking bolts 202, and one ends of the locking bolts 202 penetrate through the through holes 201 and are arranged on the mold core of the bottom mold 20; a first exhaust gap 203 is arranged between the mold core of the bottom mold 20 and the mold cavity 101, a second exhaust gap 204 is arranged between the locking bolt 202 and the through hole 201, and the first exhaust gap 203 is communicated with the second exhaust gap 204.

A plurality of mold cavities 101, for example, 2, 3, or 4 mold cavities, may be disposed in the lens molding mold in this embodiment, so that a plurality of products can be molded in one injection molding process to improve the production efficiency. Taking one mold cavity 101 as an example for explanation, when a plurality of mold cavities 101 are provided, the mold cavities are reasonably arranged in a rectangular array manner, which is the prior art and will not be described in detail herein.

Specifically, the shape of the mold cavity 101 is the shape of a lens. After the top mold 10 and the bottom mold 20 are closed, lens materials (resin, silica gel, acrylic transparent particles and the like) in a molten state are injected into the mold cavity 101 through the injection holes, and gas in the mold cavity 101 is discharged sequentially through the first exhaust gap 203 and the second exhaust gap 204, so that the gas in the mold cavity 101 is prevented from forming bubbles in the lenses, and the production quality of the lenses is improved. Meanwhile, since the smoothness of the surface of the lens or the shape of the surface of the lens is ensured, the first exhaust gap 203 is designed at the edge position of the mold cavity 101 to form a yield design, thereby further improving the quality of the product.

As shown in fig. 5, a honeycomb surface 2051 is disposed on the top surface of the core of the bottom mold 20 facing the top mold 10 in this embodiment, and the honeycomb surface 2051 is formed by sequentially splicing a plurality of hexagons without a groove having a honeycomb structure. Therefore, a honeycomb surface can be formed on the surface of the lens by the mold core structure of the bottom mold 20, so that the requirement of observation through the honeycomb surface 2051 is met, and the practicability is improved.

As shown in fig. 2, fig. 3 and fig. 5, in the present embodiment, the middle of the mold cavity of the bottom mold 20 extends toward the top mold 10 to form a protrusion 205, the honeycomb surface 2051 is disposed on the surface of the protrusion 205, and the first exhaust gap 203 is located between the protrusion 205 and the side surface of the mold cavity of the bottom mold 20. The gap formed between the protrusion 205 and the mold cavity groove is the sidewall of the lens, so that the lens forms a cover body structure, and is convenient to install through the sidewall, and the practicability is improved. Meanwhile, the first exhaust gap 203 is arranged at the side wall of the lens, so that the smoothness of the mirror surface of the lens and the mirror surface profile of the lens can be ensured, and the injection molding quality of the lens is improved.

In this embodiment, the side of the mold core of the top mold 10 facing the bottom mold 20 is recessed inward to form an arc-shaped polished surface 102, and through the design of the arc-shaped polished surface 102, an arc-shaped convex surface can be formed on the other side of the lens by injection molding, so that the observation can be performed through the honeycomb surface 2051 of the lens, and the practicability is improved.

The width of the first exhaust gap 203 in this embodiment is between 0.01mm and 0.02 mm. The width of the second exhaust gap 204 is between 0.01mm and 0.05 mm. The width setting of first exhaust clearance 203 and second exhaust clearance 204 can be injectd according to the difference of the material of moulding plastics, if the material mobility of moulding plastics is great, then the width setting of clearance is less, otherwise then can correspondingly increase the width of clearance, satisfies carminative demand, can reduce the condition of overlap simultaneously.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The forming die for the lens comprises a top die and a bottom die, wherein when the top die and the bottom die are matched, at least one die cavity is formed in the top die and the bottom die; it is characterized in that the preparation method is characterized in that,

the die cavity of the bottom die is provided with a plurality of through holes, the bottom die is provided with a plurality of locking bolts, and one ends of the locking bolts penetrate through the through holes to be arranged on the die core of the bottom die;

2. The lens molding die according to claim 1, wherein: the top surface of the die core of the bottom die facing the direction of the top die is provided with a honeycomb surface.

3. The lens molding die according to claim 2, wherein: the mould benevolence groove middle part of die block orientation the top mould direction extends and forms the arch, the honeycomb face sets up bellied surface, first exhaust clearance is located the arch with between the mould benevolence groove side of die block.

4. The lens molding die according to claim 1, wherein: and the side surface of the die core of the top die, which faces the direction of the bottom die, is concave inwards to form an arc-shaped polished surface.

5. The lens molding die according to claim 1, wherein: the width of the first exhaust gap is 0.01-0.02 mm.

6. The lens molding die according to claim 1, wherein: the width of the second exhaust gap is 0.01-0.05 mm.