发明名称 |
GIESS- ODER SPRITZFORM ZUR HERSTELLUNG VON REIFEN |
摘要 |
<p>A casting or injection mold for vehicle tires comprises two separable half-shells together defining an annular cavity into which a segmented core is introduced, radially inwardly converging core segments alternating with parallel-sided or radially inwardly diverging core segments to facilitate extraction of the core from the molded tire. In operation, one or more of the non-converging segments are immobilized within the mold, with the aid of mating formations on these segments and on the two half-shells, while the converging segments are urged radially inwardly by resilient or fluidic forces. In a specific embodiment these forces are supplied by a contractile annular spring with projections received in axially extending undercuts of all the segments.</p> |
申请公布号 |
AT338637(B) |
申请公布日期 |
1977.09.12 |
申请号 |
AT19750002216 |
申请日期 |
1975.03.24 |
申请人 |
POLYAIR MASCHINENBAU GES.M.B.H. |
发明人 |
SCHMIDT OSKAR;GRUNNER ERICH ING.;TOMPICH HORST;LENK GERHARD;DRUM ADAM |
分类号 |
B29D30/08;B29B7/00;B29B13/00;B29C33/00;B29C33/44;B29C33/76;B29C39/00;B29C39/10;B29C39/26;B29C41/00;B29C45/00;B29C45/26;B29C45/37;B29C67/00;B29D30/06;(IPC1-7):29H3/08 |
主分类号 |
B29D30/08 |
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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