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    • 1. 发明授权
    • Water soluble cores, process for producing them and process for die
casting metal using them
    • 水溶性芯,其制造方法和使用它们的压铸金属的工艺
    • US5127461A
    • 1992-07-07
    • US603843
    • 1990-10-29
    • Kenji MatsunagaMichiyuki SuzukiMasahiro Tokuse
    • Kenji MatsunagaMichiyuki SuzukiMasahiro Tokuse
    • B22C1/02B22C1/18B22C9/10B22C9/12
    • B22C9/105B22C1/18
    • Disclosed are water soluble core wherein a particulate refractory material is combined with a binding agent comprising Na.sub.2 CO.sub.3, Na.sub.2 O . NSiO.sub.2 where n is 0.5 to 4, and SiO.sub.2 as ingredients and a process for producing the water soluble core. The process comprises mixing the particulate refractory material with a water glass, casting the mixture of the particulate refractory material and the water glass, hardening the casting by CO.sub.2 gas, and calcining the casting at between 100.degree. C. and a temperature less than that of an endothermic peak of the water glass in differential thermal analysis. Also, a process for die casting a metal is disclosed using the water soluble core which process comprises pre-heating the water soluble core from a temperature of 300.degree. C. below a melting point of the metal to a temperature of the endothermic peak.
    • 公开了水溶性核心,其中颗粒耐火材料与包含Na 2 CO 3,Na 2 O的粘合剂组合。 NSiO 2,其中n为0.5至4,SiO 2为成分,以及制备水溶性核的方法。 该方法包括将颗粒状耐火材料与水玻璃混合,铸造颗粒状耐火材料和水玻璃的混合物,用CO 2气体硬化铸件,并在100℃和低于 差热分析中水玻璃的吸热峰。 此外,使用水溶性核心公开了压铸金属的方法,该方法包括将水溶性核心在低于金属熔点的300℃的温度下预热至吸热峰的温度。