Treatment methods for internal defects of die-cast parts - shrinkage cavities and shrinkage porosity

Reduce the pouring temperature to decrease the shrinkage; increase the injection pressure ratio and the boost pressure to enhance the compactness; modify the internal gate design, optimize the pressure transmission, and promote the liquid metal secondary pouring; adjust the casting structure, eliminate the metal accumulation areas, and try to maintain the uniform wall thickness; accelerate the cooling of the thick parts; appropriately thicken the handle to 15-30mm to enhance the secondary pouring effect.