Key Mold Design Challenges

Molding of complex 3D twisted blades: Requires high-precision mold inserts and mirror polishing (Ra ≤ 0.025 μm) to ensure optimal fluid dynamics and smooth demolding.
Strict dynamic balance requirements: Wall thickness uniformity must be controlled within ±0.05 mm to prevent vibration and noise during high-speed rotation.
Shrinkage compensation for high-performance materials: Commonly used materials such as POM, PA66+GF, or PPS exhibit significant and anisotropic shrinkage, necessitating precise pre-distortion compensation in the mold design.
Integrated structure demolding strategy: The impeller and hub are molded as a single piece, requiring carefully optimized draft angles and ejection systems to avoid blade deformation or fracture during ejection.

Typical Application Industries

Automotive electronics (e.g., electric water pumps, battery cooling circulation pumps)
Home appliances (e.g., air conditioner fans, washing machine drain pumps, humidifiers)
Industrial equipment (e.g., small centrifugal pumps, corrosion-resistant chemical pumps)
Consumer electronics (e.g., PC cooling fans, cooling impellers for power tools)

Injection Mold Design Proposal for Engineering Plastic Centrifugal Impeller (Single Cavity)