Degassing Injection Mold

Abstract

The invention discloses a degassing type injection mold. The degassing type injection mold comprises a bottom die (1) and a top die (2). The degassing type injection mold is characterized in that a feeding opening (3) for filling injection material is formed in the top die (2) and is fixedly connected with a feeding pipe (4); the feeding pipe (4) comprises a vertical pipe (5), an inclined pipe (6) and a degassing device (8); the degassing device (8) is connected with the vertical pipe (5) and the inclined pipe (6). According to the degassing type injection mold, by arranging the degassing device, the injection material is degassed before injection molding, so that the condition that no air bubble is generated in the surfaces and the insides of formed plastic parts can be ensured; especially for some plastic parts which has high requirement on processing accuracy and are free of air bubbles, the quality fully meets the standard, the finished product ratio and the production efficiency of the plastic parts are improved.

Description

technical field [0001] The invention relates to a degassing injection mold, which belongs to the technical field of molds. Background technique [0002] At present, molds are widely used in production enterprises, which have high work efficiency and convenient operation. Thermoplastic injection molding has a short molding cycle, high production efficiency, and the injection material has little wear on the mold. It can form large quantities of plastic parts with complex shapes, clear surface patterns and marks, and high dimensional accuracy. [0003] However, the existing injection molds generally do not have a degassing function, the air in the injection molding material cannot be discharged in time, and air holes often appear on the surface and inside of the plastic part after molding, especially for some plastics that require high processing accuracy and cannot have air bubbles. As far as parts are concerned, the plastic parts produced by the existing process have a low q...

AI Technical Summary

Problems solved by technology

[0003] However, the existing injection molds generally do not have a degassing function, the air in the injection molding material cannot be discharged in time, and air holes often appear on the surface and inside of the plastic part after molding, especially for some plastics that require high processing accuracy and cannot have air bubbles. For parts, the plastic parts produced by the existing process have a low qualification rate and a high rework rate, resulting in waste of man-hours and production costs, and extremely low production efficiency.

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