A composite protective coating process on the surface of a polycarbonate automobile door pillar plate

Abstract

The invention belongs to the technical field of car accessory processing, and provides a polycarbonate car door post plate surface compound protective coating structure and a technique. The structure comprises a door post plate body component, wherein the door post plate body component is formed by integral injection molding of a polycarbonate material; a double compound protective coating, formed by product annealing, piece loading, primary coat electrostatic dust collection, primary coat shower coating, primary coat leveling, primary coat baking, primary coat cooling, coat electrostatic dust collection, topcoat shower coating, topcoat leveling, topcoat baking, cooling and piece loading, serves as a final protective layer of the surface of the door post plate body component; a primary coat is an acrylic resin coating; and a topcoat is a silicone resin coating. The structure and the technique have the advantages that a polycarbonate car door post plate treated by the technique has better weather resistance, scraping resistance and glossiness, so that the requirements of a car factory on performance standards are met; the application of the polycarbonate car door post plate is promoted; and the structure has the advantages of good weather resistance, high hardness and excellent scraping resistance.

Description

technical field [0001] The invention belongs to the technical field of auto parts processing, and relates to a surface treatment method for polycarbonate high-gloss injection molded parts for automobiles, in particular to a composite protective coating structure and process on the surface of a polycarbonate automobile doorpost plate. Background technique [0002] At present, the production processes of automobile doorpost panels mainly include: ABS leather injection molding, ABS injection molding + high-gloss coating, metal stamping + high-gloss coating, but these processes have shortcomings without exception, either the decoration is not enough, or The weight is too heavy and does not meet the lightweight design concept. Therefore, in order to develop high-gloss, light-weight car door pillar panels, technicians decided to introduce polycarbonate material into the design of car door pillar panels. The car door pillar panels modeled with this material not only have a black gl...

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Problems solved by technology

[0002] At present, the production processes of automobile doorpost panels mainly include: ABS leather injection molding, ABS injection molding + high-gloss coating, metal stamping + high-gloss coating, but these processes have shortcomings without exception, either the decoration is not enough, or The weight is too heavy and does not meet the lightweight design concept

Therefore, in order to develop high-gloss, light-weight car door pillar panels, technicians decided to introduce polycarbonate material into the design of car door pillar panels. The car door pillar panels modeled with this material not only have a black glass texture appearance , very strong appearance impact, high toughness and good heat resistance; but the surface has poor scratch resistance and insufficient weather resistance. Therefore, it is necessary to coat the surface with a coating. The coating should have high hardness. Excellent scratch resistance and weather resistance, while ordinary organic resin coatings have low hardness and cannot meet the requirements of scratch resistance

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