Construction method of Xi 'an Xinbo fire-proof decorative coatings for Jingliang doors and windows

Scraping method: use metal or nonmetal scraper, such as hard rubber sheet, FRP scraper, horn scraper, etc. Scrape all kinds of thick slurry fire retardant coatings and putty.

Roller coating method: the roller is a hollow cylinder with a small diameter, and the surface is covered with long fluff made of fibers. Two washers are installed at both ends of the cylinder, and there is a hole in the center, through which the curved handle passes. When in use, the roller is immersed in the paint, and then it is forcibly coated on the required surface.

A roller coating device with air compressor for conveying paint was developed.

Brush coating method: Brush coating method is suitable for brushing objects of any shape, and most fire-retardant coatings can be applied in this way.

Brush coating can easily penetrate into the pores of the metal surface, so it can strengthen the adhesion to the metal surface.

The disadvantage is that the production efficiency is low, the labor intensity is high, and sometimes there are brush marks on the surface of the coating, which affects the decoration of the coating.

Spraying method: a construction method of spraying paint by using compressed air, which is characterized by uniform coating quality and high production efficiency.

The disadvantage is that a part of pigment is lost, and a large amount of evaporation of solvent affects the author's health.

The key equipment of air spraying is spraying.

Spraying is usually divided into gravity type, suction type and pressure type according to the coating supply mode, and also divided into small and large types according to the spraying ability.

The paint has high viscosity and needs high air pressure, so the nozzle should be large in diameter; The paint has low viscosity and low pressure, and the nozzle can choose small caliber.

The air pressure of air injection is generally 0.3~0.6MPa.