Surface paint spraying technological process for larger-area metal workpiece

Abstract

The invention relates to a surface paint spraying technological process for a larger-area metal element. According to the surface paint spraying technological process, oil stain on the surface of the metal workpiece in the production process is removed, and cleaning is carried out; rust scale on the steel surface is removed by acid, and cleaning is carried out; the steel surface is phosphatized by a zinc-system phosphate solution, and cleaning is carried out; workpiece paint spraying is carried out after the drying phosphorization and the cleaning; before the paint spraying, variety selection, performance selection, uniform mixing, viscosity selection, purification filtering and color regulation of paint are prepared; during paint spraying, the proper paint and the proper viscosity of the workpiece to be sprayed are selected according to the workpiece to be sprayed, and are determined according to the paint type, the air pressure, the spray nozzle size and the requiring quantity of the sprayed area; polymerized paint is dried, the ordinary drying temperature is 130 to 140 DEG C, the drying time is 30 to 35 minutes, and the polymerized paint is dried; the drying degree of a paint film is checked, and the thickness, the adhesive force, the color, the luster and the surface state of the paint film are checked through visual inspection or cutter blade scratching. The surface paint spraying technological process for the larger-area metal element has the advantages that sprayed paint on the workpiece surface is enabled not generate leak points and peeling, the labor and the materials are saved, the cost is reduced, and the quality is excellent.

Description

technical field [0001] The invention relates to a process flow for spraying paint on the surface of a metal workpiece with a relatively large area for external painting treatment. Background technique [0002] Large-area metal workpiece surfaces or complex workpiece surfaces need to be treated with spray paint. In the past, strict process flow was not adopted to control the entire construction of spray paint. After spray paint, there will always be one or a few points of peeling off. As a result, the overall paint removal must be carried out. Re-painting not only causes waste of raw materials and labor, but also increases the cost. It also makes the quality of the painting on the surface of the workpiece poor and delays the construction period. In order to avoid such phenomena, a strict painting process must be adopted. Contents of the invention [0003] In order to solve the above-mentioned problems, the present invention provides a process flow for spraying paint...

AI Technical Summary

Problems solved by technology

[0002] Large-area metal workpiece surfaces or complex workpiece surfaces need to be treated with spray paint. In the past, strict process flow was not adopted to control the entire construction of spray paint. After spray paint, there will always be one or a few points of peeling off. As a result, the overall p