One of main reasons to result in casting hot tears is poor yieldability of the mold(core),particularly when thin wall steel castings are produced by a no-bake resin sand,the problem is more serious.

• 热裂产生的主要原因之一就是型(芯)砂容让性差，尤其是用自硬树脂砂生产薄壁铸钢件时，这个问题显得特别突出。