To meet the lightweight and corrosion-resistant requirements of drone water tanks, rotational molding offers a highly efficient solution with the following technical advantages:

    Seamless One-Piece Structure‌: Rotational molding enables the production of complex hollow water tanks without welded seams, eliminating leakage risks through uniform material distribution via biaxial rotation‌.

Wall Thickness Control‌: Intelligent temperature control and adjustable rotation speed ensure uniform wall thickness (±0.5mm tolerance), critical for reducing drone weight‌.

    Material Selection‌: High-density polyethylene (HDPE) is prioritized for its low density (0.95g/cm³), impact resistance (≥25kJ/m²), and resistance to UV/chemical corrosion, ideal for outdoor applications‌.

Mold Optimization‌: Aluminum alloy molds (40% lighter than steel molds) with quick-release mechanisms enable rapid mold changes and flexible production of multi-specification tanks‌.

    Material Pre-Treatment‌: PE powder is dried (moisture ≤0.05%) and measured to minimize air bubbles‌.

    Molding Phase‌: The mold rotates in a heating oven (165–180°C) to coat the interior, followed by cooling. Automated control ensures a cycle time ≤30 minutes‌.

    Post-Processing‌: CNC trimming removes burrs, and pre-embedded threads/connectors are integrated for direct drone assembly‌.

    Lightweight‌: HDPE tanks reduce weight by 60% compared to metal, enhancing drone endurance‌.

    Environmental Durability‌: Withstands temperatures from -40°C to 80°C and pressures ≥0.3MPa, suitable for extreme conditions (e.g., high-altitude or saline environments)‌.

    Cost Efficiency‌: Mold costs are 1/3 lower than injection molding, supporting small-to-medium batch production with a lifespan exceeding 100,000 cycles‌.