Thin-wall injection mold and preparation method of thin-wall plastic parts

Abstract

The invention discloses a thin-wall injection mold and a preparation method of the thin-wall plastic part, and belongs to the field of injection molding. The thin-wall injection mold comprises a front mold assembly, a rear mold assembly, a cooling system, a separation system, a cavity capacity adjustment system and a heating control module. The preparation method comprises the following steps: S1, before die assembly, separating a die core by the cooling system through the separation system, increasing the cavity capacity to be greater than the product volume through the cavity capacity adjustment system, and heating a cavity through the heating control mold; S2, carrying out primary die assembly, and ensuring that the sealed cavity capacity is still greater than the product volume; S3, injecting fused plastic with the volume greater than the product volume; and S4, carrying out final die assembly by adopting a hundred-tonnage pressure extrusion cavity of an injection molding machine, and enabling the cooling system to be contacted with the die core for cooling. Through the adoption of the mold and the preparation method disclosed by the invention, the obtained large-area thin-wall plastic part has the advantages of compactness, good filling effect, no weld mark on the surface and no gas mark, and achieves the effect that the surface is glossy and free of spraying.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a method for preparing a thin-walled injection mold and a thin-walled plastic part. Background technique [0002] Existing mobile phones, notebooks, tablet computers and other products are showing a trend of thinning and thinning, and the thickness of related plastic structural parts is getting thinner and thinner. At present, the thickness of large-area plastic structural parts is generally above 0.7mm. Plastic structural parts are generally difficult to fill completely, the product lacks glue, and there are weld marks, surface air marks, trapped air and other undesirable phenomena on the surface, and the product cannot achieve the effect of high gloss surface without spraying. Contents of the invention [0003] One object of the present invention is to propose a method for preparing thin-walled plastic parts, so as to solve the problems of difficult filling, rough surface, in...

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Problems solved by technology

[0003] One object of the present invention is to propose a method for preparing thin-walled plastic parts, so as to solve the problems of difficult filling, rough surface, insufficient surface hardness, and easy scratches and wear on the appearance surface of the large-area thin-walled plastic parts prepared in the prior art. , so that it is impossible to achieve the technical problem of high gloss free spraying on the surface

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