发明名称 |
A METHOD AND APPARATUS FOR PRE-HEATING A PLASTIC STRIP TO FACILITATE PLASTIC WELDING AT A LOCATION UNDERGROUND |
摘要 |
An apparatus for lining an underground conduit is disclosed. The apparatus (10) includes an annular frame (40) and a strip guide disposed around and supported by the annular frame (40). The strip guide is arranged to guide a strip (12) around a helical path when the machine is in use. A drive assembly (70) is mounted to the frame (40) for driving the strip (12) so as to present an incoming first edge (16) to an adjacent second edge (18) of a wound convolution of the strip. An extruder (80) is mounted to the frame, the extruder having a nozzle (85) for extruding a molten bead of plastic onto the strip (12). A multi-stage air heater including a first heating stage (50) powered by compressed air and a second heating stage (150) powered by electricity, the multi-stage heater is provided for generating heated air and a nozzle (95) for directing the heated air onto the plastic strip (12) is also disclosed. |
申请公布号 |
DK201270148(A) |
申请公布日期 |
2012.09.26 |
申请号 |
DK20120070148 |
申请日期 |
2012.03.26 |
申请人 |
SEKISUI RIB LOC AUSTRALIA PTY LTD |
发明人 |
DUNCAN, ROY |
分类号 |
B29C63/26;F16L11/16;F16L55/162 |
主分类号 |
B29C63/26 |
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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