发明名称 |
WERKWIJZE VOOR HET STOMPLASSEN VAN THERMOPLASTISCHE KUNSTSTOFBUIZEN MET BEHULP VAN EEN VERWARMINGSELEMENT. |
摘要 |
In a method for heated tool butt welding of pipe consisting of a thermoplastic material by placing or pressing the surfaces to be joined of the pipes to be welded into contact with a heated tool to form an inner weld bead at each end to be joined, subsequently heating the surfaces at a reduced contact pressure to the welding temperature and fitting the surfaces together under pressure after having removed the heated tool, the improvement for minimizing the formation of a protrusion within the resultant pipes which comprises pressing an elastic insert against the inner weld bead while joining said surfaces of said pipe together. |
申请公布号 |
NL7905085(A) |
申请公布日期 |
1980.01.15 |
申请号 |
NL19790005085 |
申请日期 |
1979.06.29 |
申请人 |
RUHRCHEMIE AKTIENGESELLSCHAFT TE OBERHAUSEN-HOLTEN, BONDSREPUBLIEK DUITSLAND. |
发明人 |
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分类号 |
B29C33/44;B29C33/52;B29C65/00;B29C65/20;(IPC1-7):29C27/06 |
主分类号 |
B29C33/44 |
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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