覆膜砂射芯机热芯盒的除垢方法

The descaling method for the hot core box of the film mulching machine

覆膜砂射芯机的芯盒中垢物的形成机理，主要是由于芯砂表面的树脂在射砂过程中受到射砂气流的冲击，部分树脂破裂，少量的树脂被挤压粘附于芯盒表面，日积月累逐渐在芯盒表面形成一层坚硬、致密的硬化树脂垢。因此，射砂压力过大，树脂质量差，芯砂中树脂加入量过高，脱模剂与所用树脂不匹配；芯盒表面粗糙都将促使芯盒结垢。

The formation mechanism of the fouling in the core box of the coated sand core machine is mainly due to the impact of the sand jet flow on the sand surface of the core sand. Some resin is broken and a small amount of resin is extruded on the core box surface, and gradually forms a hard and compact hardened resin scale on the core box surface. Therefore, the pressure of sand shooting is too large, the quality of the resin is poor, the resin in the core is too high, the release agent is not matched with the resin used, and the surface roughness of the core box will cause the core box to scale.