Preparation process of wiper plastic part with bones

Abstract

The invention discloses a preparation process of a wiper plastic part with bones. The preparation process comprises the following steps: (1) drying materials before processing, and testing whether the materials are dried completely or not by an air injection method; (2) selecting an injection system with more temperature control sections and little self-friction heating during plasticization, wherein the actual weight of a product is not less than 2 / 3 of the injection amount of a machine; (3) molding a blank by a hot runner mold, wherein a heat insulation plate is arranged between the mold and a mold plate of an injection molding machine; and (4) measuring by the air injection method at melting temperature, wherein the temperature is set to be 290-315 DEG C. In the step (1), the temperature for drying the materials is 170 DEG C, and the time is above 3-4h. The preparation process disclosed by the invention has the characteristics of simple process and good product quality.

Description

technical field [0001] The invention belongs to the technical field of auto parts, and relates to a preparation process of a bone wiper plastic part. Background technique [0002] The principle of the bone wiper is to press the wiper blade on the glass through several support points on the skeleton, so that the pressure of each support point on the wiper blade is averaged. However, after the plastic parts are molded, there is a certain difference from the predetermined quality standard (inspection standard), which cannot meet the requirements of the next process. This is the defect of the plastic part, which is often referred to as a quality problem. It is reduced to a minimum. Contents of the invention [0003] The invention aims at overcoming the defects of the prior art, and provides a preparation process of a bone wiper plastic part, which has the characteristics of reasonable process and good product quality. [0004] The purpose of the present invention is specific...

AI Technical Summary

Problems solved by technology

However, after the plastic parts are molded, there is a certain difference from the predetermined quality standard (inspection standard), which cannot meet the requirements of the next process. This is the defect of the plastic part, which is often referred to as a quality problem. its minimized