发明名称 |
Method and extrusion head for extruding a polymeric material |
摘要 |
An extrusion method and head for depositing by extrusion a polymeric material intended, in particular, for the production of cables includes a core and a coating layer arranged at a radially outer position with respect of the core. The method includes the steps of feeding the polymeric material in a feeding duct of the extrusion head and of conveying a part of the polymeric material towards an undercut extending in the extrusion head in proximity of an end of the feeding duct. The method provides a sealing force between a head body and a conveyor element of the extrusion head exerted by means of the pushing action exerted by the polymeric material in the undercut in a direction substantially perpendicular to the longitudinal axis of the head body.
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申请公布号 |
US7927531(B2) |
申请公布日期 |
2011.04.19 |
申请号 |
US20050499201 |
申请日期 |
2005.01.05 |
申请人 |
PRYSMIAN CAVI E SISTEMI ENERGIA S.R.L. |
发明人 |
CASTIGLIONI VALTER;RIELLA ANGELO;BELLI SERGIO;BALCONI LUCA |
分类号 |
B29C47/00;B29C47/08;B29C47/28 |
主分类号 |
B29C47/00 |
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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