发明名称 |
Flash-free vented tire mold |
摘要 |
A tire mold having air and gas venting holes is provided with synthetic resin plugs mounted in enlarged bore portions of the vent holes adjacent the inner forming surface of the mold. The plugs are axially compressible and project a slight distance beyond the inner surface of the mold. The molding pressure of the material within the mold compresses the plug whereby an outer surface of the plug becomes generally flush with the inner surface of the mold cavity to substantially eliminate the formation of runners on the molded tire. The plugs preferably are formed of a PTFE (polytetrafluoroethylene) filter leaf membrane material.
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申请公布号 |
US4740145(A) |
申请公布日期 |
1988.04.26 |
申请号 |
US19870073611 |
申请日期 |
1987.07.15 |
申请人 |
THE FIRESTONE TIRE & RUBBER COMPANY |
发明人 |
SHURMAN, LOUIS W. |
分类号 |
B29C33/10;(IPC1-7):B29C33/10;B29C35/02 |
主分类号 |
B29C33/10 |
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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