砂芯制造是铸造生产中重要的一部分,过去一般沿用粘土作为黏结剂的型料,或用干性油料为粘结剂的油砂以打制砂芯,为了分离在湿态条件下打制成形砂芯中的水分,或使油料与砂粒固结,就必需将砂芯送入烘炉去加热干燥,以获得高的机械强度.化学硬化法制造砂 Sand core manufacturing is an important part of foundry production. In the past it was common practice to use clay as a binder, or dry oil as a binder for oil sand to create a sand core. In order to separate the forming under wet conditions Sand in the water, or oil and sand consolidation, it is necessary to send the sand to the oven to heat and dry, in order to obtain high mechanical strength. Chemical hardening sand