Spraying method

Abstract

The invention relates to a spraying method which comprises the following steps: providing a work piece with a to-be-sprayed surface; spraying a liquid-state coating with the viscosity of 1-8 cP onto the surface of the work piece; carrying out high-temperature pre-baking, namely pre-baking the work piece at 50-80 DEG C for 10-90 seconds; carrying out low-temperature pre-baking, namely pre-baking the work piece at 30-50 DEG C for 1-4 minutes while controlling the inclination of the to-be-sprayed surface of the work piece at less than 20 degrees; and carrying out high-temperature oven-drying, namely oven-drying the work piece at 50-80 DEG C for 5-15 minutes. Through the steps of high-temperature pre-baking, low-temperature pre-baking and high-temperature oven-drying, the sprayed coating has uniform thickness and has less possibility of forming pinholes; and during low-temperature pre-baking, the inclination of the work piece is only less than 20 degrees, and during high-temperature pre-baking, the work piece can be placed with a larger inclination. By utilizing the spraying method provided by the invention, the utilization rate of baking equipment is improved, and the baking cost is lowered.

Description

Technical field [0001] The invention relates to a spraying method. Background technique [0002] The shells of general consumer electronic products such as mobile phones or computers are usually painted on the outer surface to achieve the decoration purpose of beautifying the shell. When spraying, paint or ink is sprayed on the surface of the workpiece, and a coating film is formed after the solvent evaporates. When the workpiece is dried, the spraying surface must be kept roughly horizontal to bake to prevent the upper coating film from moving downward when it is placed obliquely, so that the lower edge of the coating film is thick, but the sheet-like workpiece is placed horizontally and baked so that the amount of workpiece placed on each layer of the oven is relatively large. Less, the baking cost is higher. Summary of the invention [0003] In view of the above situation, it is necessary to provide a spraying method with a lower baking cost. [0004] A spraying method include...