Custom Heavy-Duty Cast Aluminum Rotomolding Mold with Steel Skeleton Cage for Large Oval Water Storage Tanks & Agricultural Rain Tubs OEM/ODM

Engineered for agricultural irrigation, livestock watering, rain harvesting, and industrial fluid storage, our Custom Heavy-Duty Cast Aluminum Rotomolding Mold is specialized for producing large-capacity oval water storage tanks, water tubs, and aquaculture containers.

Crafted from high-density cast aluminum alloy, the oval deep-draw cavity features an engineered grid of internal reinforcement ribs. This structural design guarantees high wall strength, preventing side-wall bowing under heavy water pressure while ensuring uniform plastic resin deposition during oven rotation. The wide-mouth rim incorporates precision CNC-machined sealing flanges with alignment dowel pins to eliminate parting line flash and resin leakage.

The mold cavity is enclosed within a rigid octagonal square-tube steel skeleton frame equipped with heavy-duty long-handle perimeter toggle clamps. This supports multi-axis thermal rotation without structural sagging or thermal warping. We deliver complete turnkey OEM/ODM engineering—from 3D tank CAD modeling and resin shrinkage optimization to precision mold fabrication and mass production testing.