铸造锌基合金大型落座模胎，一般是在铸铁底模上浇注。过去铸造后，分模十分困难，因为热涨冷缩上下模胎互相咬得很紧，每次要用大概头敲打才能砸开。不但费工时，有时还砸坏模子，不但给铸造车间带来困难，使用单位也十分不便（也要砸）。原因是原用白涂 Large-scale casting zinc-based alloy sealant mold, casting is generally cast on the bottom mold. Casting the past, the parting is very difficult, because the heat up and down the upper and lower mold bite each other very tight, each time about to break with the head beat. Not only time-consuming, and sometimes smashed mold, not only to the foundry shop difficulties, the use of units is also very inconvenient (also hit). The reason is that the original white coating