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Views: 22 Author: Site Editor Publish Time: 2021-04-09 Origin: Site
In recent years, there are more and more aluminum die casting manufacturers. In the era of rapid technological development, machinery and equipment are constantly being updated. The supply of aluminum die casting parts is more and more in short supply, so there are so many aluminum die. casting manufacturers.
Custom aluminum die casting parts are widely used in various aspects such as decoration, furniture accessories, architectural decoration, bathroom accessories, lighting accessories, toys, tie clips, belt buckles, metal buckles, and high-demand casting surface quality, which requires a good surface treatment. A common defect of aluminum die casting parts is surface blistering.
The main defect is the protruding vesicles on the mold surface. After polishing or processing, the fuel injection or electroplating is exposed. The cause of blistering defects in aluminum die casting parts is that the pores are mainly caused by pores and shrinkage mechanisms, and the pores are often round and irregular. The cause of the porosity is that during the filling and solidification process of the molten metal, the inner surface or inner hole of the casting is invaded by the volatile gas of the coating produced by the intrusion of gas. During solidification, the gas content of the alloy liquid is too high. When the gas in the cavity is emitted by the paint, and the gas is solidified by the alloy. When the mold is exhausted, the pores formed in the casting can remain.
The reason for the shrinkage is that during the solidification of the molten metal, the liquid shrinks due to the decrease in volume or final solidification position. The uneven thickness of aluminum die casting parts or local overheating of the castings causes slow solidification of certain parts and dents on the surface due to volume shrinkage. Since the pores and shrinkage cavity castings are processed on the surface, the holes can enter the water to paint and bake after plating. The quality of aluminum die casting parts depends on the precision of the processing equipment. The gas in the hole expands when heated; or the water in the hole changes the steam volume The expansion causes blistering on the surface of the casting.
