Compression molding method for carbon fiber automotive front cover

Abstract

The invention relates to a compression molding technological process for a carbon fiber automotive front cover, and belongs to the technical field of traffic facilities. Compared with the general compression molding method for the carbon fiber automotive front cover, the provided compression molding method for the carbon fiber automotive front cover has the advantages that three procedures including prepreg preheating, premolding and semi-finished product cooling are omitted, the technological process is simplified, equipment and tooling released by a production line are reduced, occupation space of the equipment and the tooling is saved, investment cost is reduced, and quality risks in position deviation and fiber texture disorder probably caused by preform transfer are avoided; medium-temperature cured carbon fiber prepreg with curing time of 5-10 min is selected, so that the compression molding period of the automotive front cover is shortened remarkably, and one giant leap is madefor adapting to fast production rhythm in the automotive industry; a semi-finished product is demolded after mold temperature is reduced to 80-100 DEG C, mold occupation time of the semi-finished product is reduced, molding period is further shortened, and the quality problems of deformation, mold sticking and fiber texture disorder of the semi-finished product are solved.

Description

technical field [0001] The invention relates to a rapid molding process flow of a carbon fiber front hatch cover for automobiles. It belongs to the technical field of traffic facilities. Background technique [0002] At present, the common compression molding method of automobile front hatch generally includes prepreg cutting, prepreg preheating, preforming, preformed body mold entry, mold closing, curing, demoulding, semi-finished product cooling, edge trimming, inspection and other processes , it can be seen that there are many molding processes and a long production line, which will easily lead to an increase in production equipment, tooling, site, cost, etc., followed by an increase in quality control points, which will increase risks to the quality of the final product; the prepreg curing cycle of the ordinary curing system It lasted for several hours, completely unable to adapt to the rhythm of high-efficiency production in the automotive industry; in order to facilit...

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Problems solved by technology

[0002] At present, the common compression molding method of automobile front hatch generally includes prepreg cutting, prepreg preheating, preforming, preformed body mold entry, mold closing, curing, demoulding, semi-finished product cooling, edge trimming, inspection and other processes , it can be seen that there are many molding processes and a long production line, which will easily lead to an increase in equipment, tooling, site, and cost of the production line, followed by an increase in quality control points, which will increase risks to the quality of the final product; the prepreg curing cycle of the ordinary curing system It lasted for several hours, completely unable to adapt to the rhythm of high-efficiency production in the automotive industry; in order to facilitate demoulding, avoid semi-finished product deformation, sticking to the mold, and prevent fiber texture disorder on the outer surface of the semi-finished product, the temperature of the molding mold was lowered below 60°C before demoulding. Semi-finished products occupy the mold for a long time, and the molding cycle is prolonged. The next product needs to be heated again, which increases energy consumption. The carbon fiber front hatch cover that is molded will also face two major technical problems: First, the direction of the carbon fiber texture on the outer surface cannot be disordered at all. , the second is that the product deformation of the special-shaped surface with a thickness of about 1mm meets the tolerance requirements

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