High-speed spraying aluminum profile fluorocarbon powder formula and spraying method

Abstract

The invention discloses a high-speed spraying aluminum profile fluorocarbon powder formula and a spraying method. The powder formula comprises, by mass, 0.1-1% of PVDF fluorocarbon resin, 33-45 % of acrylic acid, 4-5% of polyisocyanate, 48-60% of polyester resin, 0.5-0.7% of benzoin, 1.5-2% of leveling agent. Powders made by the formula are used as body powders during spraying; a two-step spraying method is used in the spraying process; and in a same powder room, firstly, the body powders are sprayed, then, face powders are sprayed, reclaimed powders after spraying can be reused, the reclaimed powders can be used as the face powders, and the mass percentage of the reclaimed powders in the face powders is 0-30%. According to the aluminum profile produced by the fluorocarbon powder formula and the spraying technology, the problems that the fluorocarbon powders coating leveling is poor, the adhesion is poor and the like are solved. The coating thickness can be lowered to 30 [mu]m, the coating has an attractive appearance and a good performance; a horizontal spray production line is used; the forward speed of the profile can reach 6 m / min; and the high-speed spraying aluminum profile fluorocarbon powder formula and the spraying technology is high in efficiency, low in cost and high in performance.

Description

technical field [0001] The invention relates to an aluminum profile spray coating powder formula and a spraying process, in particular to an aluminum profile spray coating fluorocarbon powder formula and a spraying process. Background technique [0002] Powder coating has the advantages of high efficiency, environmental protection, and powder recyclability, and is an ideal method to replace liquid spraying. At present, in medium and large aluminum processing enterprises, powder coatings are basically used for conventional coatings such as polyester; however, as fluorocarbon coatings with high weather resistance, powder coatings are rarely used. The carbon powder manufacturing technology is immature, and the adhesion is poor. On the other hand, the fluorocarbon powder spraying method and process are immature, and the sprayed products have many defects and poor performance. For a long time, in the factory production, the products that need fluorocarbon coating still use the l...

AI Technical Summary

Problems solved by technology

At present, in medium and large aluminum processing enterprises, powder coatings are basically used for conventional coatings such as polyester; however, as fluorocarbon coatings with high weather resistance, powder coatings are rarely used. The carbon powder manufacturing technology is immature, and the adhesion is poor. On the other hand, the fluorocarbon powder spraying method and process are immature, and the sprayed products have many defects and poor performance.

For a long time, in the factory production, the products that need fluorocarbon coating still use the liquid spraying method, and when the liquid spraying, the solvent volatilization will cause environmental pollution, and the falling waste cannot be recycled, resulting in waste of resources, increasing waste water discharge, and combustible gas in the air. High concentrations are prone to safety accidents

At present, fluorocarbon powder manufacturing technology has made great progress, but the method and process of fluorocarbon powder spraying aluminum profiles in the mass production process are still unstable and cannot be applied on a large scale in the mass production process

[0003] In order to ensure the powder coating rate, uniformity of spraying, and prevent quality defects such as exposed bottom, the existing powder coating, especially fluorocarbon spraying, generally travels at a speed of 2.5m / min-3.5m / min, which greatly limits the Spraying efficiency of aluminum profiles, increased operating costs

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