铸造材料

请问砂型浇口杯那里有点开裂是怎么回事?

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请问砂型浇口杯那里有点开裂是怎么回事?
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这种现象主要是铸型的材质收缩或风干造成的。改变铸型的砂质和降低型砂的水分这样的问题很容易得到决、
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浇口杯裂?铸型裂?
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