CN203141756U

CN203141756U - Glue overflow preventing structure of silica gel injection mould

Info

Publication number: CN203141756U
Application number: CN 201320017601
Authority: CN
Inventors: 张俊林; 田天斌
Original assignee: DONGGUAN HUAQING OPTICAL TECHNOLOGY Co Ltd; Janus Dongguan Precision Components Co Ltd
Current assignee: DONGGUAN HUAQING OPTICAL TECHNOLOGY CO LTD
Priority date: 2013-01-14
Filing date: 2013-01-14
Publication date: 2013-08-21
Anticipated expiration: 2023-01-14

Abstract

The utility model relates to a glue overflow preventing structure of a silica gel injection mould, and the glue overflow preventing structure comprises a front mould core and a rear mould core, wherein the rear mould core is internally provided with an insert, a top block and a silica gel cold runner product; a silica gel forming cavity is formed between the rear mould core and the insert and a plastic structural part which needs to be injected with silica gel; and the rear mould core and the periphery of the silica gel forming cavity positioned on the insert are provided with triangular ribs which enclose the silica gel forming cavity. The glue overflow preventing structure of the silica gel injection mould, which is disclosed by the utility model, effectively solves the problem of glue overflow phenomenon in a silica gel injection process under the precondition without damaging the plastic structural part.

Description

A kind of silica gel injection mold anti-overflow plastic structure

Technical field

The present invention relates to the mould structure of silica gel post forming, be specifically related to a kind of silica gel injection mold anti-overflow plastic structure.

Background technology

Along with the rapid growth of user to the demand of waterproof mobile phone, the use of silica gel quadric injection mould forming technique more and more widely.Silica gel belongs to thermosets, and the grume that is in a liquid state at normal temperatures is mobile as water.The plane crush-cutting is all used in the tradition sealing, directly carry out the silica gel injection moulding at plastic cement structural member and the moulding die cavity that the back die forms, because the silica gel good fluidity, and the thickness difference of plastic parts moulding and Mould Machining trueness error, very easily produce batch cutting edge of a knife or a sword and the glue that overflows after making the silica gel moulding; Come sealing by force if take to increase the precompressed amount, the plastic of post forming will be weighed wounded.

Summary of the invention

For overcoming the problem of the deficiencies in the prior art and existence, the utility model provides the silica gel injection mold anti-overflow plastic structure that a kind of silica gel moulding die cavity sealing effectiveness is good, can effectively prevent burr and excessive glue phenomenon.

The utility model is achieved through the following technical solutions:

A kind of silica gel injection mold anti-overflow plastic structure, comprise die behind the front mould Renhe, die inside, described back is provided with mold insert, jacking block and silica gel cold runner product, be provided with the triangle rib with the encirclement of silica gel moulding die cavity around the silica gel moulding die cavity on back die, the mold insert and need to constitute between the plastic cement structural member of injection moulding silica gel silica gel moulding die cavity, described back die and mold insert.

Described triangle rib height is 0.15mm.

The utility model by the improvement mould structure, arranges triangle rib to prevent the glue that overflows compared with the prior art around silica gel moulding die cavity, both played the effect that prevents burr and excessive glue phenomenon, has guaranteed the quality of plastic cement structural member after the post forming again.

Description of drawings

Fig. 1 is anti-overflow plastic structure schematic diagram of the present utility model;

Fig. 2 is Figure 1A place enlarged drawing.

Among the figure: die behind the 1-, 2-mold insert, 3-jacking block, 4-plastic cement structural member, die before the 5-triangle rib, 6-, 7-silica gel cold runner product.

The specific embodiment

Understanding for the ease of those skilled in the art describes in further detail the utility model below in conjunction with accompanying drawing.Should be pointed out that specific embodiment described herein only is used for explaining the utility model, and be not used in restriction the utility model.

As shown in Figure 1, a kind of silica gel injection mold anti-overflow plastic structure, die 6 and back die 1 before comprising, die 1 inside, described back is provided with mold insert 2, jacking block 3 and silica gel cold runner product 7, back die 1, mold insert 2 and need to constitute between the plastic cement structural member 4 of injection moulding silica gel silica gel moulding die cavity, be provided with the triangle rib 5 that silica gel moulding die cavity is surrounded around the silica gel moulding die cavity on described back die 1 and the mold insert 2, silica gel is the border that is molded over the mobile phone back cover in the present embodiment, be the loop-shaped of a closure, so triangle rib 5 is inboard and the outside that continuity is distributed in circle.

Described triangle rib 5 height are 0.15mm, because triangle rib 5 is little in the contact area of stitching state and plastic cement structural member 4 crush-cuttings, the Li Jiao of triangle rib 5 can be absorbed in the plastic cement structural member 4 under less pressure effect, reaches sealing effectiveness, prevents that effectively the silica gel of moulding from producing batch cutting edge of a knife or a sword and the glue that overflows; Simultaneously, the pressure that plastic cement structural member 4 fronts are subjected to also will reduce, thereby guarantee that the product surface outward appearance can not weighed wounded; Also evaded the risk that causes the glue that overflows because of the thickness difference of plastic parts moulding and Mould Machining trueness error.

The content of mentioning in above-described embodiment is not to be to restriction of the present utility model, and under the prerequisite that does not break away from inventive concept of the present utility model, any apparent replacement is all within protection domain of the present utility model.

Claims

1. silica gel injection mold anti-overflow plastic structure, comprise die behind the front mould Renhe, die inside, described back is provided with mold insert, jacking block and silica gel cold runner product, back die, mold insert and need to constitute silica gel moulding die cavity between the plastic cement structural member of injection moulding silica gel is characterized in that: be provided with the triangle rib with the encirclement of silica gel moulding die cavity around the silica gel moulding die cavity on described back die and the mold insert.

2. silica gel injection mold anti-overflow plastic structure according to claim 1 is characterized in that: the high 0.15mm of being of described triangle rib.