发明名称 ELEKTRISCH SCHWEISSBARE MUFFE ZUM VERBINDEN VON ROHRLEITUNGSTEILEN AUS THERMOPLASTISCHEM KUNSTSTOFF.
摘要 <p>The electrically weldable sleeve has a tubular sleeve member, heating elements arranged on the inner wall of the sleeve member and terminals for an energy supply. A material recess in the form of slots is provided in the edge zone of the boundary area of the heating element. This makes it possible to completely utilize the shrinkage reserve imparted to the sleeve member during the production of the sleeve, so that it is effective up to the solidification of the core of the melting zone. It also completely compensates for the volume contraction of the material linked with the solidification of the melting zone, so that the occurrence of cavities is reliably avoided. Corresponding to the axial flux of force represented by lines, the material recesses must be located at a point, which leads to no weakening of the sleeve member portions decisive for assembly and operation.</p>
申请公布号 DE3582652(D1) 申请公布日期 1991.05.29
申请号 DE19853582652 申请日期 1985.11.21
申请人 VON ROLL AG, GERLAFINGEN, CH 发明人 RUEEDE, ERNST, CH-4512 BELLACH, CH
分类号 F16L47/02;B29C65/00;B29C65/34;B29C65/68;F16L47/03;(IPC1-7):F16L47/02 主分类号 F16L47/02
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