树脂砂造型有一个可以脱模而不会产生缺陷的合适的脱模时间问题。脱模过早,可能产生塌型、掉砂或开裂等缺陷;而脱模太迟,脱模力很大,甚至造成铸型破裂。这个合适的脱模时间是变化的,受室温、空气湿度、砂子温度、粘结剂以及固化剂的种类和加入量等因素的影响。 Resin sand molding has a mold release without causing defects in the appropriate mold release time. Demoulding premature, may produce collapse type, sand or cracking and other defects; and demoulding too late, a large release force, or even cause the mold to rupture. This suitable demolding time varies, depending on factors such as room temperature, air humidity, sand temperature, binder and type and amount of hardener.