发明名称 |
Method and apparatus for manufacturing a spherical hollow body |
摘要 |
Improved method for manufacturing a spherical hollow body are disclosed. The spherical hollow body has a use for a core member for manufacturing a football or a volleyball and is manufactured by cooling a thermoplastic resin contained in a spherical hollow mold which is forcedly circulated along a constant locus simultaneously with the rotary motions on two axes orthogonal to each other.
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申请公布号 |
US4294793(A) |
申请公布日期 |
1981.10.13 |
申请号 |
US19800125389 |
申请日期 |
1980.02.27 |
申请人 |
TACHIKARA KABUSHIKI KAISHA |
发明人 |
TAKAZAWA, KAZUYASU |
分类号 |
B29C33/36;B29C41/06;(IPC1-7):B29C5/04 |
主分类号 |
B29C33/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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