大家知道,铸件质量与型砂性能有极密切的关系。型砂强度是直接影响铸件质量的主要性能之一。目前国内绝大多数铸造工厂都以湿态抗压强度作为型砂强度的主要指标。型砂湿态抗压强度只是一种有关于起模后下芯和合箱时型砂能保持型腔形状的能力。生产实践证明,在较多的情况下铸型和型芯遭到破坏是由于型砂受拉而造成的。例如,铸型起模和制芯起出时,型砂就受到拉力。在实际 We all know that casting quality and sand performance are closely related. Sand strength is a direct impact on the quality of casting one of the main properties. At present, the vast majority of foundries in the country have wet compressive strength as the main index of sand strength. Moisture compressive strength of sand is only one kind of ability to keep the shape of the cavity when the sand core and the box are combined after the mold is released. Production practice has proved that in more cases, the mold and the core are damaged due to the sand pulled. For example, when the mold is cut and the core is raised, the sand is pulled. In fact