Gravity + Sand Casting Large Aluminum Pump Bodies/Housings/Bases

We offer comprehensive Large Aluminum Casting capabilities with a maximum single-piece weight of 5 tons (5000kg) , covering three core processes to meet diverse requirements from precision pressure-tight parts to ultra-large structural components:

• Low-Pressure Die Casting (LPDC) : Uses air pressure to smoothly fill molten aluminum into permanent steel molds. The controlled filling process ensures high density and minimal porosity, delivering superior mechanical properties. Ideal for NEV Integrated Subframes, Motor Housings, and Reducer Housings requiring pressure-tightness and high strength (50kg-300kg). Our LPDC line can produce complex castings up to approximately 300kg.

• Gravity Casting (Permanent Mold) : Relies on molten aluminum's own weight to fill permanent molds, assisted by top or bottom gating systems. Cost-effective between LPDC and sand casting, suitable for medium-to-large aluminum parts with regular shapes such as Large Pump Bodies, Gearbox Housings, and Wheel Hubs. Gravity castings offer dense structures and superior mechanical properties to sand castings, with single-piece weights exceeding 500kg.

• Resin Sand Casting : Uses furan resin self-hardening sand molds with virtually no size or weight limitations—the core process for achieving 5-ton ultra-large aluminum castings. Ideal for Aerospace Door Frames, Large Machine Bases, Wind Turbine Frames, and Large Pump Volutes. Sand casting allows complex internal cavities and heavy sections with significantly lower mold costs than permanent molds, making it the preferred choice for single-piece and low-volume ultra-large castings.

Our process engineers will recommend the optimal solution based on your part geometry, batch size, mechanical requirements, and budget, and can provide comparative trial castings using different processes for the same product.