射芯機能否生產出好質量的產品，射芯機模具起著關鍵的作用。一般來說，射芯機模具分為冷芯盒和熱芯盒兩種。

The core ejection machine plays a key role in whether the core machine can produce good quality products. Generally speaking, the core ejection machine is divided into two types: cold box and hot core box.

冷芯盒模具使用樹脂砂作原料，用三乙胺固化；也有用水玻璃砂作原料，用二氧化碳固化的，水玻璃砂的流動性差，只能用在簡單產品工藝上，因此現在使用的非常少。冷芯盒模具適合體積比較大質量比較高的產品。

Cold core box mold using resin sand as raw material, three ethylamine solidified; also water glass sand as raw material, carbon dioxide solidified, water glass sand fluidity is poor, can only be used in the simple product process, so the use of very few. Cold box mold is suitable for products with relatively large volume and high quality.

熱芯盒模具是通過加熱的方式來固化砂芯產品，現在都是采用電加熱的方法。熱芯盒模具使用覆膜砂作原料，又叫覆膜砂模具，使用這種模具的射芯機也叫覆膜砂射芯機。熱芯盒模具適合制造中小型結構復雜的產品，因此在鑄造廠被廣泛應用。

The hot core box mold is made by heating the sand core product, and now it adopts electric heating method. Hot core box mold uses coated sand as raw material, also called film coated sand mold. The core ejection machine using this mold is also called film coated sand core machine. Hot box mold is suitable for manufacturing complex products of medium and small size, so it is widely used in foundry.