In sectors such as new energy vehicles, aerospace, and precision machinery, the demands for lightweight metal components like aluminum and magnesium alloys are becoming increasingly stringent: they must possess high strength and air tightness while also featuring thin walls, complex geometries, and near-net-shape forming. Traditional die casting, which traps air leading to internal porosity and shrinkage, struggles to meet requirements for subsequent heat treatment or welding. Vacuum Pressure Die Casting technology has become key to overcoming this bottleneck—and at its core lies a high-performance vacuum pressure die casting system.
How Does Vacuum Change the Nature of Die Casting?
In conventional die casting, air inside the mold cavity is entrapped by the high-speed filling molten metal, forming gas pores that limit the part's mechanical properties and further processing.
Vacuum pressure die casting equipment addresses this by rapidly evacuating air from the mold cavity before injection (achieving a vacuum level of 50–100 mbar), resulting in:
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Significant Reduction in Porosity and Oxide Inclusions: Casting internal density increases to over 99.5%;
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Enabled T6 Heat Treatment and Welding: Eliminates risk of blistering, with strength potentially increasing by 15%–30%;
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Higher Dimensional Accuracy and Surface Quality: Reduces flash and flow marks, lowering subsequent machining costs;
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Improved Material Utilization: A more stable process window reduces scrap rates by over 40%.
More Than Just "Vacuum": It's a Systems-Level Engineering
A reliable vacuum pressure die casting system requires integration of:
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High-speed response vacuum valves (opening time <30ms);
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Optimized mold sealing design;
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Real-time vacuum monitoring with closed-loop feedback;
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Seamless linkage with the die casting machine's PLC to ensure process synchronization.
Our independently developed vacuum die casting system is compatible with major die casting machine platforms like LK, Buhler, and Yizumi. It supports high-quality production ranging from small-to-medium parts (e.g., motor housings) to large structural components (e.g., integrated body parts).