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新型简易成型模具比普通低熔点合金模变形小,使用寿命长,因其凸凹模有几种金属材料构成,紧固部分是用锡铋合金,而冲压工作面则分别用铜铁金属粒组成。制模过程见附图。先按工件形状制一个样件1,并在其适当位置钻几个工艺小孔。在熔箱2内,浇入定量熔融的低熔点锡铋合金3,再倒入比重小于锡铋合金的硬金属粒4(铁或
The new simple forming mold has the advantages of less deformation and longer service life compared with ordinary low melting point alloy molds, because the concave and convex molds are composed of several metal materials, the fastening parts are made of tin-bismuth alloy, and the pressed working surfaces are respectively made of copper-iron metal grains. Molding process see photo. Make a sample first according to the shape of the workpiece, and drill a few holes in its proper place. In the box 2, poured into the quantitative melting of low melting point tin bismuth alloy 3, and then poured into a specific gravity less than tin bismuth alloy hard metal particles 4 (iron or