Aluminum alloy die casting plating should avoid these problems

Core Abstract: In die-casting production, different alloy materials can be manufactured into corresponding billet products by different processes and machines (such as zinc alloy die-casting parts, aluminum alloy die-casting parts, magnesium alloy gold die-casting parts), and then processed by surface treatment. To be a product that consumers can use

In die-casting production, different alloy materials can be manufactured into corresponding billet products by different processes and machines (such as zinc alloy die-casting parts, aluminum alloy die-casting parts, magnesium alloy gold die-casting parts), and then processed by surface treatment to become consumption. Products that can be used. Among them, aluminum alloy die-casting electroplating is a common process in surface treatment, but it is more complicated and demanding than zinc alloy die-casting electroplating process. Jiawei Metal will talk about relevant technical points on this issue today to avoid the appearance of electroplating. Unnecessary problems.

1. Reduce defects in the molding of aluminum alloy die castings

Simply put, aluminum die castings should avoid surface defects caused by die-casting molds, die-casting environments (cooling systems, pressure systems, etc.), die-casting machines, and man-made operation methods in the production process (common defects such as surface sand holes and shrinkage). , cold grain, etched mold, lack of material, etc.), further affecting the increase in the non-defective rate of aluminum alloy die casting process.

Aluminum alloy die casting site production drawing

2. Avoid surface polishing and improper defects

Surface polishing is the primary processing technology for aluminum alloy die-casting before plating. It is also essential to remove some defects on the surface of the black embryo casting, and at the same time achieve the purpose of smooth and smooth surface, so that subsequent plating is easier. However, this process should avoid human defects, such as deformation, dimensional changes, etc., quality control should be strict.

3. Avoid pre-plating cleaning is not complete, causing post-plating quality problems

Aluminum alloy die-casting parts need to be ultrasonically cleaned before waxing and degreasing to achieve clean surface, which will guarantee the subsequent plating reliability. This process should be carried out in strict accordance with the operation instructions. The time, temperature and acoustic parameters should be set in accordance with the process requirements. .

4. Avoid poor adhesion and produce defective products

The adhesion of the alloy product can be tested by the harsh hundred test to know if the plating is strong. However, since the surface activity of the aluminum alloy is not as high as that of the zinc alloy, the adhesion of the aluminum alloy die-casting after plating is not so easy to control. The general solution in the industry is to perform pre-plating treatment before the formal plating, that is, surface passivation and copper plating, and then formal plating, this program is recognized by the industry.

In short, in the aluminum alloy die-casting process, even if the die-casting materials are the same, there will be differences in the process of electroplating due to the operation method. In order to ensure the quality of the final surface treated product, it is necessary to calmly analyze and find suitable Solutions to reduce the rate of non-performing in production.