Zinc Alloy Mould
The surface of zinc alloy die casting is a dense layer with a thickness of about 0.1 mm and a loose porous structure inside. When designing zinc alloy mould and using the die-casting process, try to make the surface of workpiece smooth to reduce casting defects such as cracks, pores, cold gaps, flash and burrs. For this reason, mechanical cleaning must be carried out. Then damage to the surface dense layer should be avoided to cause difficulty of plating due to exposure of the porous substrate and affect plating quality. Zinc alloy molding often uses a mold release and technician should pay attention to use and removal of mold release. It is one of the factors affecting bonding strength of coating. Due to the active chemical properties of zinc, it can be used in various surface treatments, such as electroplating, baking varnish, electrophoresis, dusting and other surface treatment processes. The treated zinc alloy die-casting parts are beautiful, colorful and textured, meeting diversified competition in the modern market.
In the increasingly fierce competition of international die-casting mold market, Japanese die-casting mold industry is also working hard to reduce production costs. In terms of market size, Japanese recession is most evident regardless of output value or domestic demand. Japanese mold makers pay more attention to polishing and grinding process in terms of technology. German mold manufacturers start by improving precision and efficiency of machining and electrical discharge machining to reduce time of manual processing. Japan’s die-casting mold industry is gradually shifting molds with low technical content to areas with low labor costs, producing only high-tech products in Japan, and Japan’s tendency of shift to foreign countries, which makes Japan’s domestic die-casting molds use reduce. This prompts China mold maker to seize more of die-casting mold market.