铁型覆砂铸是在金属型（称作铁型）内腔覆上一薄层型砂而构成铸型的一种铸工艺。

由于覆砂层比较薄（4～8mm），因此使用比较贵的高质量造型材料，在经济上也是合理的，其结果是使铸件质量大大提高和废品明显增加；由于铁型覆砂铸型刚度不错，从而明显地提升了铸件的尺寸精度和颗粒性。

金属型精密铸造的特点是铸件在取出的过程中不会破坏铸型，铸型可以重复使用，生产大量相同的铸件。

同覆膜砂型铸造相比，金属型精密铸造生产的铸件拥有更细的晶粒组织和更高的力学性能。

Sand coated iron mold casting is a casting process in which the inner cavity of metal mold (called iron mold) is covered with a thin layer of molding sand to form a mold.

Because the sand layer is relatively thin (4 ~ 8mm), it is economically reasonable to use expensive high-quality molding materials. As a result, the casting quality is greatly improved and the waste products are significantly increased; Because the iron mold covered with sand has good rigidity, the dimensional accuracy and graininess of the casting are obviously improved.

The characteristic of metal mold precision casting is that the casting will not damage the mold in the process of taking out. The mold can be reused to produce a large number of the same castings.

Compared with coated sand casting, the castings produced by metal mold precision casting have finer grain structure and higher mechanical properties.