冷冻法铸型是近儿年发展起来的一项新的造型技术。其原理是采用冷冻的方法将流态型砂温度冷却到零度以下,使铸型和砂芯牢固凝结。型砂的主要成份是自然砂、水、少量的自然结合剂以及粘土、膨润土等。冷冻铸型制成后,用高温铁水浇注,使水变成蒸气从铸型中蒸发出来,没有烟 Frozen cast is developed in recent years, a new modeling technology. The principle is to use the method of freezing the flow of sand cooling temperature below zero, the mold and the sand firmly solidified. The main component of sand is natural sand, water, a small amount of natural bonding agent and clay, bentonite and so on. After the frozen mold is made, it is poured with high-temperature molten iron so that the water turns into steam and evaporates from the mold without smoke