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首页> 美国政府科技报告 >Use of Low-Melting Metal Alloys for Casting and Transfer Molding of Hollow Plastic Spheres
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Use of Low-Melting Metal Alloys for Casting and Transfer Molding of Hollow Plastic Spheres

机译：低熔点金属合金在空心塑料球铸造和传递模塑中的应用

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In order to produce a hollow plastic ball with only a small opening at one point, a core ipsert, made from a low melting alloy, was used in both a casting mold and a transfer mold. In the casting process, the plastic was poured into the mold as a liquid and cured at room temperature. In the transfer process, the plastic was forced into the mold cavity under pressure (3000 psi) and cured at 310F. In both cases, the finished ball (with insert inside) was heated in a mineral oil bath at 350F to melt the core. This melted core material was poured out of the plastic ball through the small opening and was reused for casting additional cores. (Author)

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