One-time injection molding process for producing automobile instrument panel shell body

Abstract

The invention discloses a one-time injection molding process for producing an automobile instrument panel shell body. The one-time injection molding process comprises the following steps of 1, improving a mold; 2, pre-preparing a raw material; 3, pretreating equipment; 4, carrying out a pre-plasticizing process; 5, carrying out a mold closing process; 6, carrying out a mold filling process; 7, carrying out a pressure maintaining feeding process; 8, carrying out a cooling and shaping process; 9, carrying out an ejecting-out taking out process; and 10, carrying out a post-treatment phase.

Description

technical field [0001] The invention relates to the field of injection molding, in particular to a disposable injection molding process for the production of automobile instrument panel shells. Background technique [0002] With the continuous expansion of the application range of plastic products in life, such as in the automotive industry, aerospace, building materials, household hardware, instruments and many other fields, the proportion of plastic products is increasing at a very rapid rate. Injection molding is the most commonly used method, which is suitable for parts with complex surface shapes and high precision requirements, and has the advantages of low production cost and high production efficiency. [0003] The automobile instrument panel shell is installed on the instrument panel through the buckle on it, which plays the role of being beautiful and protecting the inner structure of the instrument panel. At present, injection molding is mostly used in the produc...

AI Technical Summary

Problems solved by technology

However, this production method has the following disadvantages: 1) Due to the large size of the automobile dashboard shell, a series of problems such as insufficient filling, air pockets, volume shrinkage or warping are prone to occur during the injection molding process, which seriously affects the aesthetics of the product and accuracy; 2) Due to the assembly relationship between the car dashboard shell and other components, the precision of the injection molded parts is high, but the surface precision of the injection molded products is not high at present, and there is a large warping deformation, which needs to be processed Subsequent polishing and reshaping work, which prolongs the entire production cycle and reduces production efficiency; 3) The strength of the car dashboard shell is not high. During use, due to vibration, especially the buckle connection parts are prone to wear and tear, resulting in subsequent use. 4) During the injection molding process, there is the phenomenon of molten material dripping from the nozzle and the phenomenon of mold cracking, which will cause raw material consumption and seriously affect product quality.