Car rearview mirror die-casting mold usually requires a variety of surface treatments to meet different performance requirements and increase the service life of the mold.
A common surface treatment is nitriding. By forming a nitride layer with high hardness and good wear resistance on the surface of the mold, the wear resistance of the mold can be significantly improved. During the die-casting process, the mold surface is constantly impacted and rubbed by high-temperature, high-pressure molten metal. Nitriding-treated molds can better resist this wear and reduce the occurrence of surface scratches and pits. At the same time, the nitride layer also has good anti-corrosion properties, which can prevent the mold from rusting in a humid environment or in contact with corrosive substances. For example, for Car rearview mirror die-casting mold used in some areas with high humidity, nitriding treatment can effectively extend the service life of the mold.
Hard chrome plating is also a common surface treatment method. The surface of the mold after hard chromium plating has high smoothness, which is conducive to the flow of molten metal and the demoulding of the product, and reduces the possibility of defects on the product surface. The hard chromium layer has high hardness and wear resistance and can withstand high-intensity die-casting operations. In addition, hard chromium plating can also improve the oxidation resistance of the mold and maintain the stability of the mold in high temperature environments. For example, during continuous die-casting production, molds plated with hard chromium can better maintain dimensional accuracy and surface quality.
For some Car rearview mirror die-casting molds that require extremely high surface quality, polishing can also be performed. Polishing can remove minor flaws and processing marks on the mold surface, making the mold surface smoother and flatter. This can not only improve the appearance quality of the product, but also reduce the resistance of the molten metal during the flow process and improve the die-casting efficiency. At the same time, the smooth surface also helps the release agent to adhere evenly, further improving the release performance.
In addition, in order to improve the thermal fatigue performance of the mold, surface quenching treatment can be performed. This treatment method can form a hardened layer with high hardness and good toughness on the surface of the mold, which can withstand the thermal shock and mechanical stress during the die-casting process. In frequent die-casting cycles, surface quenching treatment can effectively reduce cracks and deformation of the mold due to thermal fatigue.
In short, the surface treatment of the Car rearview mirror die-casting mold is an important link. Appropriate surface treatment methods can be selected according to different production needs and mold performance requirements to improve the quality and service life of the mold and ensure the durability of the car rearview mirror. Production quality and efficiency.
