Cast aluminum door manufacturers explain the paint process in detail

The paint process plays a very important role in the production process of cast aluminum doors. Paint The quality of the craftsmanship directly determines the beautiful appearance of the product. Ouhua Zundi cast aluminum doorThe paint adopts automotive paint technology What is it like? Next, let’s take a look at the painting process of Ouhua Zundi’s cast aluminum doors with the editor!

Shot blasting process before painting – the paint layer peels off partially, mainly due to the oxide layer, oil stains and impurities on the surface of the aluminum material. Generally, manufacturers use manual polishing. If there are dead corners or omissions in manual polishing, layering or partial peeling will occur. High-pressure shot blasting uses 360 degrees to clean the surface without dead corners to prevent paint from peeling off. High-pressure shot blasting uses fine steel to hit the aluminum surface, forming tiny pits on the aluminum surface to expand the paint contact area, expanding the contact area by three times, allowing the paint to bite into the aluminum surface and increasing the paint adhesion.

220 degree high temperature baking paint – Conventional car baking paint is 160-180 degrees. That is because cars are generally made of iron and have active chemical properties, and aluminum is more inert. To make aluminum and paint reach the same level The adhesion effect requires a higher temperature, the standard is 200-230 degrees, and we chose 220 degrees. On the market, 50 degrees is also said to be baking paint, 100 degrees is also said to be baking paint, and 300 degrees is also said to be baking paint. sinceIt is baking paint. The lower the better, nor the higher the better. Only when the temperature is within the standard value can the adhesion reach a good state!

Multiple paints – Our paints generally have 4-6 layers, which vary slightly depending on the color system. Generally, they are two bases, two colors, two sides, and four paints.

Strong Primer ——Primer thickness. Our primer thickness is generally controlled at 40-60μ. The thermal expansion and contraction rate of the paint thickness within this value is close to the thermal expansion and contraction rate of the aluminum material, and can be almost synchronized. If the difference is too large, the paint will easily layer.

Metallic fluorocarbon glazing paint – this kind The painting process is actually very different, although the market opinions are similar. The main function of this kind of paint is to protect the metal from oxidation; strengthen the surface hardness so that it is not easily scratched; and prevent discoloration and fading caused by ultraviolet radiation.