射芯機是采用覆膜砂制芯，適用于熱芯盒。射芯機的特點是應用兩根導柱，開合模垂直分型，同時安裝兩副不同的模具，中間固定架可以雙面安裝定模，左右開合模（相當于雙模架）。射芯機廣泛應用于鑄造行業(yè)中，用射芯機制造的型芯尺寸精確，表面光潔。射芯機工作原理是將以液態(tài)或固態(tài)熱固性樹脂為粘結劑的芯砂混合料射入加熱后的芯盒內，砂芯在芯盒內預熱很快硬化到一定厚度（約為5～10 mm) 將之取出，形成表面光滑、尺寸精確的優(yōu)質砂芯成品。

The core shooting machine is made of coated sand core, which is suitable for hot box. The core machine is characterized by the application of two guide columns, the opening and closing die vertical typing, and the simultaneous installation of two different moulds. The middle fixer can be fixed on both sides and the die is left and right (equivalent to a double die frame). The core shooting machine is widely used in the foundry industry. The core made by the core shooter is precise in size and smooth in surface. The working principle of the core ejection machine is that the core sand mixture with liquid or solid thermosetting resin as the binder is injected into the core box after heating. The preheating of the core in the core box is quickly hardened to a certain thickness (about 5~10 mm) and will be taken out to form a smooth and accurate quality sand core product.