Carbon fiber automobile front floor compression molding method

Abstract

The invention belongs to the technical field of traffic facilities, and relates to a carbon fiber automobile front floor compression molding method. A carbon fiber prepreg is used as a molding material, and a prepreg molding process is used as a basis, and the compression molding method comprises the following steps of prepreg cutting; die maintaining; prepreg paving, specifically, paving the cutprepreg layer by layer according to the design laying area and the laying angle, and selecting 12K carbon fibers and one-way belt prepreg as the prepreg; and closing the mold, pressurizing, heating, curing, and then demolding. Compared with an existing molding process method, the carbon fiber automobile front floor body manufactured by the method has the advantages of no need of using an auxiliarymaterial, no air tightness requirement and environmental friendliness, the appearance quality is good, the corner area is free of defects, the product thickness of different areas is different, and the profile tolerance meets the requirements.

Description

technical field [0001] The invention belongs to the technical field of traffic facilities and relates to a carbon fiber front floor molding method for automobiles. Background technique [0002] At present, most of the common front floors in the automobile industry are made of metal, with integral stamping and forming, and block stamping and reassembly. With the rapid development of new energy vehicles, the weight reduction of automobile bodies has become the focus, so carbon fiber is used in automobile bodies. There are also more and more parts. Among them, the front floor body is the main load-bearing part, which has been made using VARI, RTM and other molding methods. These molding methods are roughly laid by dry fiber cloth, and the liquid resin is introduced and then cured; The VARI molding process requires the use of a variety of auxiliary materials, such as release cloth, porous isolation film, diversion net, injection tube, vacuum tube, vacuum bag, sealing strip, etc....

AI Technical Summary

Problems solved by technology

[0002] At present, most of the common front floors in the automobile industry are made of metal, with integral stamping and forming, and block stamping and reassembly. With the rapid development of new energy vehicles, the weight reduction of automobile bodies has become the focus, so carbon fiber is used in automobile bodies. There are also more and more parts. Among them, the front floor body is the main load-bearing part, which has been made using VARI, RTM and other molding methods. These molding methods are roughly laid by dry fiber cloth, and the liquid resin is introduced and then cured; The VARI molding process requires the use of a variety of auxiliary materials, such as release cloth, porous isolation film, diversion net, injection tube, vacuum tube, vacuum bag, sealing strip, etc. The RTM molding process requires the use of injection tubes, vacuum tubes, etc. Auxiliary materials are all disposable and non-recyclable, which makes the production environment unfriendly; moreover, the airtightness requirements are strict during the resin introduction and curing process, and once the air leaks, the product will be scrapped; the molding method adopted in the present invention does not need to be considered at all. However, the molded carbon fiber front floor body will face two major technical problems: one is that the prepregs cannot be overlapped during the prepreg laying process, and the other is the thickness uniformity of different areas of the larger shaped molded parts. There is no defect in the corner area, and the profile tolerance meets the requirements

Images