Casting cold-lap defect prevention methods
1) using high box or booster sprue cup on improve the liquid metal pressure head.
2) layout runner system reasonably, increase the sprue in the broken area, to increase the number of internal sprue or change the casting pouring position, make place of thin-walled bedding face easy filling.
3) modelling to careful operation, close the box when matter good clip or pressure box, with a cement box parting surface, prevent fire.Can not stop pouring process.
4) improve permeability of sand, set appropriate vent riser, make the cavity of the gas discharge smoothly.
5) melting process in strict accordance with the operation, prevent the oxidation of the liquid metal, improve the melt temperature, increase liquidity in the liquid metal.