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    • 1. 发明授权
    • Microwave process for the fabrication of cores for use in foundry casting
    • 用于铸造铸造的芯的制造的微波工艺
    • US4763720A
    • 1988-08-16
    • US86192
    • 1987-08-17
    • Toshio SakamotoKanichi SatoYoshiyuki Takemura
    • Toshio SakamotoKanichi SatoYoshiyuki Takemura
    • B22C1/00B22C1/16B22C1/18B22C1/20
    • B22C1/00B22C1/167
    • For the fabrication of a disintegratable sand core, refractory particles such as silica sand are mixed with two binders, one consisting of an inorganic substance such as a silicate and the other consisting of a starch, and, preferably, with water. The two binders function to cancel the disadvantages arising from the use of only either. The mixture is introduced into a core box molded essentially of materials pervious to microwave energy. Exposed to microwave energy through the core box, the mixture hardens in the shape of the core box cavity. For the production of cores having greater surface stability at room temperature, the starch and water are first mixed together into a paste, and this paste is added to the refractory particles together with the inorganic binder, thereby assuring uniform dispersion of the starch throughout the mixture.
    • 对于可分解的砂芯的制造,将诸如硅砂的耐火颗粒与两种粘合剂混合,一种由无机物质如硅酸盐组成,另一种由淀粉,优选与水组成。 两个粘合剂起到消除仅使用两者的缺点。 将混合物引入基本上由微波能量透过的材料成型的芯盒中。 通过芯盒暴露于微波能量中,混合物硬化为芯盒腔的形状。 为了在室温下生产具有更大表面稳定性的芯,首先将淀粉和水混合在一起成糊状,并将该糊与无机粘合剂一起加入耐火颗粒中,从而确保淀粉在整个混合物中均匀分散 。