The Functions of Painting on Aluminum Alloys

When it comes to painting aluminum alloy products, I believe everyone is quite familiar with it. After all, it is a very common method of product protection. After painting, firstly, it can better protect the products and extend their service life. Secondly, it has a decorative function, making the products look more attractive. Thirdly, it can achieve certain special properties, such as sound insulation, heat insulation, fireproofing or insulation. However, for conventional painting, high-temperature paint is usually sprayed, and it is relatively rare to spray rubber paint.

Points to Note for Spraying Rubber Paint

Today, let's talk about the points to note when spraying rubber paint on aluminum die casting products. When spraying rubber paint, in order to ensure the quality of the coating and avoid paint peeling, we need to pay attention to the following points:

1.Surface treatment:

Before spraying, the surface of the aluminum alloy product material must be treated to remove impurities such as oil stains and dust, making the surface clean and smooth. This can enhance the adhesion of the sprayed surface layer, reduce defective products, and improve the yield rate.

2.Control of spraying thickness:

The spraying thickness should be controlled. It is not advisable to spray too thick at one time. Instead, it should be sprayed in layers. Wait until each layer is properly dried before spraying the next layer. Otherwise, the adhesion will not be strong and paint peeling may occur.

3.Temperature control:

The temperature during painting is also an important factor affecting the painting effect and requires special attention. For conventional high-temperature paint spraying, it usually needs to reach about 180 degrees. However, when spraying rubber paint, attention should be paid to distinguishing the temperature control issues of the primer and the rubber paint.

Customer Cases

We once experienced a situation where, when switching the baking line, the rubber paint topcoat of some finished products peeled off, which led to customer complaints and also caused relatively large losses. After in-depth investigation of the reasons, we finally found that when switching the baking line, the temperature did not drop completely, resulting in the primer being baked too dry. When spraying the rubber paint topcoat, the adhesion was poor, and thus paint peeling occurred. For normal primer spraying, the temperature should be around 100 degrees and should not be baked too dry. Then, when spraying the rubber paint topcoat, the temperature should also be around 100 - 110 degrees.

Conclusion

Of course, there are other conventional points to note for rubber paint spraying, such as the cleanliness of the paint mixing room, the proportion of paint mixing, whether the spraying workshop is dust-free, manual spraying or automatic line spraying, etc. All of the above may affect the yield rate of the sprayed finished products. By following these precautions, we can effectively improve the adhesion and durability of the rubber paint, thereby extending the service life of the coating.