Today, for the casting process of large steel casting molding process and attention: according to the structural characteristics of steel casting process requirements, choose the appropriate casting system, usually using top injection type, bottom injection type. (1) the gating system setting principles: gate and riser position reasonable, appropriate size does not interfere with the casting shrinkage, easy to exhaust, shakeout and cleaning, should make the mould dimension reduce and simplify the modeling operation, save the amount of sand and reduce labor intensity. (2) Note: the position of the ingate ingate should not be located in the important parts of the casting; should make the liquid metal flow to the cavity of each part of the shortest distance; should not make a positive impact on the liquid metal mold and sand core; should make metal liquid can be uniformly dispersed, quickly filled the cavity; cold iron and not to support the mold core.
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