The proper progress of pouring temperature, reduce the ladle nozzle and sprue cupinterval, reducing the pouring velocity, so that the liquid metal can stable filling, avoid getting involved in gas, the gas in the cavity and the liquid metal can be discharged smoothly. Baking completely white or pale gray, not black.
The thin wall casting complex, as the progress of precision forging molding shellpermeability, where possible, in the highest can be provided with vent. The reasonable setting of gating system, prevent the pouring volume gas, and is conducive to the gaschamber.
Dewaxing should die material removed, residual die material should be as few as possible. Baking to the full, should have a high enough temperature; silica sol and theethyl silicate mold shell 950 ~ 1100 degrees Celsius, water glass shell 850 ~ 900 degrees Celsius; holding time than to ensure precision forging mould shell roasting
Through the full exclusion, gas.