Does surface roughness affect the finish? Measures against surface roughness in die casting.
The reason for the uneven application of the coating was the unevenness of the material. We will unravel the close relationship between the polishing process and painting.
[Cause of Occurrence] In parts made from aluminum die casting or zinc die casting, appearance abnormalities such as orange peel or gloss defects may occur after painting. On-site, it is often thought that there are issues with the air pressure of the spray gun or the amount of coating applied. [Truth] The root of the problem lies in the variation of the "surface roughness" of the material itself. If the roughness from casting defects or shot blasting is uneven, the paint will be absorbed into the recesses, preventing the formation of a uniform film thickness (leveling). This is directly linked to causing dripping defects. [Improvement Measures] In addition to proper surface treatment with the appropriate grit of abrasive material, utilizing the sealing effect of a primer (undercoat) can help maintain a smooth surface. Best practice materials for surface treatment that addresses the surface roughness of die-cast products can be downloaded and referenced here. [Summary] Proper polishing and primer treatment to uniformly adjust the surface roughness of the material are essential for a beautiful appearance finish. Eiwa Kogei Co., Ltd. solves appearance abnormalities with pre-treatment and painting techniques tailored to the characteristics of die-cast products.
- Company：永和工芸
- Price：Other
