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    • 2. 发明专利
    • Mold for precision casting using resin pattern on outer skin and its making method
    • 使用树脂图案在外皮上进行精密铸造的模具及其制造方法
    • JP2003326334A
    • 2003-11-18
    • JP2002135165
    • 2002-05-10
    • Akita Prefecture秋田県
    • NAGATA ARATAUCHIDA FUJIO
    • B22C9/04B22C7/02B22C9/12
    • PROBLEM TO BE SOLVED: To provide a mold for precision casting using a resin pattern on the outer skin and its making method with which such a breakage problem of a mold precursor as to consider to occur by thermally expanding to the resin pattern on the outer skin in the inner part of the mold precursor and acting to the mold precursor as internal stress can be solved.
      SOLUTION: In the mold for precision casting, using the resin pattern on the outer skin, in which the precursor for mold is constituted by coating a molding material so as to be able to maintain the shape at the molten metal temperature on the surface of the resin pattern on the outer skin having the same shape as a casting shape and the resin pattern included in the precursor is lost with a thermal decomposition in an atmosphere at not lower than the thermal decomposition temperature of the resin, an opening hole part for exhausting the thermal decomposition gas besides the opening hole parts such as a sprue for casting, a feeder head is characteristically arranged on the precursor.
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:提供一种用于在外皮上使用树脂图案的精密铸造的模具及其制造方法,通过这种模具前体的这种断裂问题考虑通过热膨胀到树脂图案上而发生 可以解决模具前体的内部部分中的作为内部应力作用于模具前体的外皮。 解决方案:在用于精密铸造的模具中,使用外壳上的树脂图案,其中模具前体通过涂覆成型材料构成,以便能够将熔融金属温度下的形状保持在 具有与铸造形状相同形状的树脂图案的表面和包含在前体中的树脂图案的表面在不低于树脂的热分解温度的气氛中热分解而损失,开孔部分 为了排出除了用于铸造的浇口之类的开孔部分之外的热分解气体,在前体上特征性地设置进料头。 版权所有(C)2004,JPO