How can zinc alloy die-casting manufacturers prevent meaty or meat defects in their products?


In the current prevailing situation, some manufacturers have announced suspension of work and holidays due to customer returns and insufficient sales of output value. However, some manufacturers are still operating normally, and even the firepower is fully turned on, and production has not stopped.

Life is not always so smooth, die-casting is also possible. During the die casting process, defects such as pores, pinholes and bubbles may appear. When a problem occurs, we must find out the cause and take corrective measures. How does a zinc alloy die-casting plant solve the problem that the manufacturer’s products are meaty or have meat defects?

What causes the fleshy or fleshy defects of the products in zinc alloy die-casting plants? According to production experience, there are two main reasons for this defect: improper heat treatment of the die-casting mold, resulting in block loss; cracks and blocks of the die-casting mold. The parting surface of the slider cannot be cleaned, and the molding surface will be damaged when the mold is closed. The way to solve such defects is to strictly follow the process of heat treatment, and the parting surface must be cleaned.

For such defects caused by die-casting die cracking in zinc alloy die-casting plants, manufacturers should reflect on the reasons why die-casting die ruptures. This is inseparable from regular maintenance and die-casting die maintenance. Therefore, in order to prevent the product from becoming meaty or meaty Defects, please follow the process, and usually pay attention to maintaining the die-casting mold.

The electrode potential of zinc alloy is very negative. In an electroplating solution containing metal ions with a positive potential, hydrogen and metal ions can be replaced by zinc, which will affect the bonding strength of the coating. At the same time, it is an amphoteric metal, which is easy to chemically dissolve in acidic or alkaline solutions.

Due to the die-casting process and mold design, zinc alloy die-cast parts usually have surface defects, such as roughness, burrs, burrs, shrinkage holes, etc., and the surface layer is a dense layer with a loose porous structure inside. Therefore, it must be mechanically cleaned, polished and polished, but not excessively polished, so as not to expose a large number of internal defects, which will cause difficulties in electroplating and affect the quality of the coating.