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Automobile carbon fiber / epoxy resin composite exterior decoration transparent coating method

A technology of epoxy resin and composite materials, which is applied in the direction of surface coating liquid devices, coatings, pretreatment surfaces, etc., can solve the problems of not being able to clearly see the carbon fiber texture and loss of aesthetic feeling, and achieve control of coating costs and Coating efficiency, excellent performance indicators, and the effect of realizing production line automation

Inactive Publication Date: 2018-12-14
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carbon fiber / epoxy resin composite material has a special matrix material texture, and the coating requires good weather resistance, clear image and high gloss. The existing spraying process cannot clearly see the carbon fiber texture. It loses its original beauty

Method used

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  • Automobile carbon fiber / epoxy resin composite exterior decoration transparent coating method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0032] Automobile carbon fiber / epoxy resin composite material front hatch is a typical exterior trim part, and its visible surface outer panel is made of carbon fiber / epoxy resin composite material. The transparent coating method used is as follows:

[0033] 1. Substrate pretreatment steps:

[0034] Use P320 sandpaper (product of 3M company, the same below) to apply uniformly and comprehensively and dry roughing the sprayed surface to a matte state, remove the mold release agent on the surface of the part, and do not damage the carbon fiber substrate and make the surface tension The value reaches more than 48 dyne;

[0035] 2. The first primer spraying step

[0036] Use SATA jet 100B F RP spray gun, air spray carbon fiber composite material special transparent primer (model is CF-1000 two-component polyurethane low-temperature primer, the manufacturer is Hunan Xiangjiang Guanxi Paint Co., Ltd.), spraying pressure 0.4MPa, nozzle diameter 1.6mm, spraying speed 0.4~0.5m / s, vertical dist...

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Abstract

The invention belongs to the technical field of spraying, and relates to a process method for spraying automobile exterior decorations, in particular to an automobile carbon fiber / epoxy resin composite exterior decoration transparent coating method. Carbon fiber / epoxy resin composite exterior decoration transparent coating is a coating technology that the carbon fiber texture can be clearly seen after the exterior decoration is painted. The selection and use of uvioresistant primers and varnishes can ensure the weatherability of the exterior decoration, meanwhile by use of the low-temperature paint, the coating environment that usually exceeds 170 DEGC for automobiles is not considered, the requirements for equipment are greatly lowered, and the coating cost is reduced; the selection of the mesh number of abrasive paper in each process is verified by a large number of experiments, and it is ensured that the textures of carbon fiber woven fabric base materials show high distinctnessof image (DOI) and adhesive force; and the coating cost and the coating efficiency can be effectively controlled through reasonable combination of two primer processes and two finishing coat processes.

Description

Technical field [0001] The invention belongs to the technical field of spraying, and relates to a process method for spraying automotive exterior parts, in particular to a transparent coating method for automotive carbon fiber / epoxy resin composite exterior parts. Background technique [0002] At present, most of the exterior parts of automobiles are made of plastic or metal materials. The manufacturing process is putty-drying-sanding-spray primer-leveling and surface drying-drying-sanding-cleaning-intermediate coating- -Leveling and surface drying-drying-polishing-cleaning-spraying varnish-drying-polishing. The purpose of this spraying process is to cover up the defects on the substrate and spray colored spray to make the surface beautiful. However, the carbon fiber / epoxy resin composite material has a special matrix material texture, and the coating requires good weather resistance, vivid image and high gloss. The existing spraying process cannot clearly see the carbon fiber t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/00B05D3/02B05D3/12
CPCB05D3/0254B05D3/12B05D7/536B05D2503/00B05D2420/01B05D2420/02
Inventor 马俊祥黄翔高鹏
Owner AVIC COMPOSITES
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