Injection molding technology for front bumper mask

A technology for injection molding and front bumper, applied in household components, applications, household appliances, etc., can solve the problems of large size, complex shape, sink marks, etc. of bumpers, so as to improve the quality of finished products, reduce production costs, and improve production. The effect of efficiency

Active Publication Date: 2017-01-04
TIANJIN HUAXIA LIANSHENG AUTOMO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large size and complex shape of the plastic bumper of a car, when it is produced by conventional injection molding technology, serious sink marks will occur in areas with uneven thickness, and defects such as warping and deformation will also occur on larger planes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] A front bumper face shield injection molding process is characterized in that it comprises the following steps:

[0055] (1) Preparation of raw materials, after mixing polypropylene, EPDM rubber and talcum powder in proportion, put them in an oven to dry for 2-4 hours, the oven temperature is 80-90°C, and the moisture content of raw materials after drying less than 0.03%;

[0056] Use a hot air dryer to dry the raw materials. Usually, the moisture content of the PP+EPDM particles for injection molding is required...

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PUM

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Abstract

The invention discloses an injection molding technology for a front bumper mask. The injection molding technology is characterized by comprising the following steps of raw material preparation, plasticizing and metering, injection molding preparation, injection molding, feeding, pressure maintaining, cooling, mold unloading, piece sampling, trimming and flame treatment. According to an automobile bumper obtained by adopting the technology, the production efficiency of the product can be improved, the production cost of the product can be lowered, and the quality of the finished product; a multi-valve gate is adopted, enough buffer exists in a cold rubber, and the obtained bumper is smooth and has no flaws. Drying is controlled to be performed for 2-4 h, the drying temperature is 80-90 DEG C, the water content of raw materials obtained after drying is completed is lower than 0.03%, and the bumper obtained by injection molding has no bubbles or shrinkage or sunken parts or other defects.

Description

technical field [0001] The invention belongs to the technical field of injection molding technology for auto parts, and in particular relates to an injection molding processing technology for a front bumper face cover. Background technique [0002] With the rapid development of the plastics industry and the automobile industry, the variety and application range of plastics used in automobiles continue to expand for the sake of economy, safety, and environmental protection. Due to the superior performance of plastics, a large number of plastics are used in automobile design, which can not only meet the design performance requirements of automobile structure lightweight, safety, anti-corrosion, shape and comfort, but also help cost and save energy. The application of plastics in automobiles is mainly divided into three categories: exterior parts, interior parts, and functional structural parts. Exterior parts: replace steel with plastic, which can reduce the weight of the car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29C45/27B29C45/47B29C45/77B29B13/06B29K23/00B29L31/30
CPCB29B13/065B29C45/0001B29C45/0025B29C45/0053B29C45/2756B29C45/47B29C45/77B29C2045/0077B29C2945/76006B29C2945/7611B29C2945/7618B29C2945/76187B29C2945/76381B29C2945/76498B29C2945/76595B29C2945/76658B29C2945/76665B29C2945/76859B29K2023/12B29K2023/16B29L2031/3044
Inventor 潘玟宇
Owner TIANJIN HUAXIA LIANSHENG AUTOMO PARTS CO LTD
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