Die assembly, method and formed blade wheel used for ejaculate molding blade wheel

Abstract

The present invention is one kind of vane wheel and its mold assembly and injection molding process. The mold assembly includes one first mold, one intermediate mold covering the first mold, and one second mold fitting with the first mold and the intermediate mold to form one mold cavity in the shape complementing the vane wheel. The injection molding process includes the following steps: setting the mold assembly, injecting molten plastic, hardening the plastic coated properly by the intermediate mold, separating plastic from the first mold, and separating plastic from the intermediate mold and the second mold to form the vane wheel. The vane wheel has vanes connected radially to the central part, and the vanes have smooth surface.

Description

technical field [0001] The present invention relates to a mold assembly and method for injection molding an impeller and the impeller formed by the method; in particular, it relates to a mold assembly that is easy to demould and avoids mold loss while avoiding deformation of impeller blades. Injection molding method and formed impeller. Background technique [0002] With the development of science and technology, all kinds of electronic products and mechanical devices are becoming more and more popular, and their functions and performances are also rapidly improving, so that the heat emitted by these devices during operation is greatly increased; on the other hand, when it is desired to reduce the size of these devices When using these products or devices (especially notebook computers or small projectors), it is necessary to consider whether the heat dissipation layout of the internal mechanism or circuit is suitable to achieve sufficient cooling performance. To fulfill th...

AI Technical Summary

Problems solved by technology

Due to the small diameter of the thimble, it is easy to break, and at the same time, a draft angle needs to be set at the blade of the mold to facilitate demoulding. This requirement will easily lead to uneven thickness of the blade and deformation of the blade, so that the finished product will shake when it is rotated.

Because of this design of the mold, because the matching insert has sharp corners, it is easy to cause frequent damage to the punch of the mold, and it needs to be replaced urgently, which will increase the cost of the mold

[0006]In view of the lack of the above-mentioned conventional impeller mold, in order to effectively reduce the production cost and avoid the lack of complicated manufacturing procedures, a mold assembly technology was developed to make the cooling fan The simplification of production and the improvement of product perfection have become the urgent goals of the industry.

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