Metal plate paint spraying method

Abstract

The invention discloses a metal plate paint spraying method. The metal plate paint spraying method comprises the following steps: the surfaces of metal plates are cleaned to achieve smoothness, cleanness, no dust, no rust and no grease, and dirt and grease in scratches in the surfaces of the metal plates are removed in the scratching direction; the surface roughness of the cleaned metal plates isincreased; then, corrosion-resistance epoxy primers are sprayed to the surfaces of the metal plates; the surfaces of the metal plates are heated and dried by 15-25 min after spraying; the drying temperature is maintained within 165-175 DEG C; then, the surfaces of the dried metal plates are flatly grinded, and putty is scraped and coated in the uneven places of the surfaces; middle paint layers are sprayed to the surfaces of the metal plates after scraping of the putty; after all spraying, the metal plates are dried by 5-10 min; then, the metal plates are baked by 10-12 min through a short-wave infrared baking lamp; the metal plates are polished after total drying of the middle paint layers; and surface paint is sprayed to the surfaces of the metal plates for drying. The metal plate paintspraying method is simple and low in operation cost, and improves the mechanical performances and the glossiness of paint spraying layers.

Description

technical field [0001] The invention belongs to the technical field of sheet metal painting, in particular to a sheet metal painting method. Background technique [0002] With the economic development of our country, the production volume of sheet metal has increased rapidly. After the sheet metal is finished, the next process is painting. Generally speaking, the light sheet metal is dipped into a syrup-like paint tank, the drying primer is taken out, and then sent to the dust-free workshop, where the top coat is sprayed with electrostatic spraying, and then dried. In the existing technology, the spray gun of the painting method is tilted and runs in a circular arc or the movement speed is variable, so that a paint film with uniform thickness cannot be obtained, and streaks and spots are easy to occur, resulting in many times when there is no one when spraying. Good effect; and before painting, the uneven part of the sheet metal surface is removed by filling or overall tre...

AI Technical Summary

Problems solved by technology

In the existing technology, the spray gun of the painting method is tilted and runs in a circular arc or the movement speed is variable, so that a paint film with uniform thickness cannot be obtained, and streaks and spots are easy to occur, resulting