型砂，可分面砂、填充砂和单一砂等。面砂是紧贴铸件的一层型砂，质量要求高。填充砂在面砂层之后，不和金属液接触，质量要求不严格。单一砂是不分面砂与背砂的型砂， 主要用于机器造型。另外大型铸件的砂型常需烘干后再浇注，它所用的型砂中含有较多的黏土，这种型砂叫干模砂；中小型铸件常用潮型浇注，它所用的型砂中合黏土量较少，这种型砂称为潮模砂。
型砂配制工艺的控制方法 关键词：型砂；混砂机；膨润土；添加剂 [gap=785]Key words：molding sand；sand mixer；betonite；additives
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Thus, the future of the development and application of green-sand mold is very prosperous. Molding sand is very important to casting’s quality.
因此,湿型砂的开发和应用前景非常广阔。
参考来源 - 气冲造型湿型砂的性能优化·2,447,543篇论文数据，部分数据来源于NoteExpress
对干砂的抗剪强度进行了研究，认为型砂存在咬合强度。
The shear strength of dry sand has been studied, the result shows the interlocking strength existing interdry sands compacted.
混砂时如果型砂的含水量较低，更回显得相当干散和硬脆。
If the moisture content of molding sand with low sand, more very dry bulk and hard brittle.
型砂与膨润土之类的添加剂充分地混合以增强连接及整体强度。
Sand is mulled (mixed) thoroughly with additives such as bentonite to increase bonding and overall strength.
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