Coloring and painting process for surface of hardware

Abstract

The invention discloses a coloring and painting process for the surface of hardware, comprising the following work procedures: material cleaning, racking, electrostatic precipitation, prime coat spraying, top coat spraying and ultraviolet curing. In the process of top coat spraying, matte UV oil is adopted as coat, the matte UV oil is a liquid material formed by adding matte powder in highlight UV oil, the particle size of the matte powder in the liquid coat is 5-50mum, a high-pressure automatic spray gun uniformly covers the matte UV oil on the surface of hardware sprayed by prime coat, and due to drying, solvent in the liquid coat volatilizes completely so as to form finish paint with a matte effect. In the invention, the hardware has low requirement on polishing or other pretreatment, a paint vehicle film layer formed by the painting process is good in covering capability, can cover the small defects of sand holes, scratching and the like on the surface of the hardware, the effect of the matte fogging surface is indicated, the yield and the production rolled yield of the product are improved, and simultaneously, the product performances such as rotproofness, wearing resistance, scratch resistance and the like can be obtained.

Description

【Technical field】 [0001] The invention relates to a spraying process, in particular to a coloring spraying process on the surface of hardware. 【Background technique】 [0002] Hardware products are an important industrial link in industrial manufacturing, because most of the hardware products are supporting products, semi-finished products, tools used in the production process, etc. in industrial manufacturing. In the long-term development process, the hardware products industry has become a relatively mature industry. The production process of the existing hardware products is basically the same. After the hardware parts are stamped and formed, they are polished and cleaned, laser engraved, and the surface is painted and sprayed to form finished products. In the face of increasingly specialized market demand and increasingly fierce competition, the main thing that can win the market and customers is the surface treatment of hardware. The purpose of the surface treatment of ...

AI Technical Summary

Problems solved by technology

Among them, the spraying and coloring process on the surface of hardware steel sheets, aluminum sheets, and zinc alloys is a fast and low-cost surface process. However, the spraying effect used on existing hardware has always been a high-gloss surface effect: that is, on the hardware. Spray transparent UV oil, and then cured by ultraviolet light to obtain a high-gloss appearance effect, and because of the high-gloss effect transparency, some small defects on the hardware surface (such as sand holes, scratches) are difficult to cover, so, It will cause higher defective products and reduce the pass-through rate of products