Design and Experiment of High Vacuum Die-casting Process Based on Hot Chamber Die-casting Machine
Based on the vacuum die casting technology of MFT and Vacuum Golve Box,the die sealing device,vacuum opening device and vacuum die casting process of hot chamber die casting machine were designed to ensure the vacuum degree in the seal box and die cavity and realize the high vacuum die casting process.The trapezoidal S-type ZA8 zinc alloy die casting was designed and manufactured and the influence of high vacuum die casting process on its forming quality was analyzed.It is found that the section characteristics of the casting under high vacuum environment are dense without shrinkage porosities.Based on the effect of trapezoidal S-type ZA8 zinc alloy castings,influence of the process on mechanical properties of castings was further analyzed in combination with experiments and actual prod-uct trial production.The results reveal that the high vacuum die casting process designed by the process has better sec-tion characteristics and mechanical properties than ordinary die casting process,where tensile strength reaches up to 396.4 MPa with hardness of 98.5 HBS.
Hot Chamber Die Casting MachineSealing DeviceHigh Vacuum ProcessMechanical Properties
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