Two-stage Vacuum High Pressure Die Casting Technology

To achieve an effective vacuum evacuation process by conventional process, the die cavity should be effectively sealed and highly responsive vacuum system should be adopted. Yet, even these two criteria are met, it is inevitable that gas is not completely removed and hence the residual gas has to be pushed out through air venting. However, gas entrapment will still exist in die-casted products.

• During the molten metal dosing stage, a primary vacuum pump system will be activated to pre-extract the gas stored inside the shot sleeve and die cavity.
• After the pre-injection phase has begun and the die cavity and shot sleeve have become confined space, a secondary vacuum pump system will be activated to extract the remaining gas inside the die cavity so that a high vacuum level can be achieved during high-speed injection phase.

• Produce metal structural parts with thin wall ribs and lower percentage of porosity.
• Enhance production yield rate.
• Ensure the mechanical strength of the die casted parts.

• High strength metal die casting parts
• Metal die casting parts with thin wall ribs