Die casting is one of the main forming methods of zinc alloy die casting, but the surface streamline, micro shrinkage hole and porosity that may appear in zinc alloy die casting must be eliminated by surface grinding, coating and repair procedures in the later period to ensure the surface quality requirements of the product. The quality of zinc alloy die casting mainly depends on the design and manufacture of die casting die and the process conditions of die casting. The design of traditional die casting die depends on the experience of engineers, and the experience of engineers usually requires many mold tests and mold maintenance. It wastes a lot of human and financial resources. If the filling process is simulated by CAE software, the efficiency of die casting die design and the quality of die casting parts can be improved.
Different thickness of inner gate will affect the flow and further affect the distribution of air pressure, which leads to the phenomenon of entrainment air in the filling process. When -2.0mid, When the melt is filled to 80%, the entrainment occurs in the middle of the casting, which makes the small area on the left side of the zinc alloy die casting have a large air pressure. When t-1.5ititi, the filling is 70, the inclusion occurs in% on the right side of the casting, and the inclusion is filled with 80% on the left side of the casting. Zinc alloy die casting has high pressure in many places, and many holes will be produced in actual production. When t = 1.0mfll, when the filling volume is 70% - 80%, the entrainment will be produced on the right side of the casting. The pressure distribution of zinc alloy casting is small, but the internal gate velocity is high, which leads to the melt directly corroding the cavity surface and then producing surface cracks.