发明名称 |
SISTEMA DI RAFFREDDAMENTO DI MATERIALE TERMOPLASTICO PARTICOLAR MENTE PELLICOLA TERMOPLASTICA |
摘要 |
A cooling system for quenching extruded thermoplastic tubing which moves in a vertically upward direction from a die to a cooling mandrel comprises a seal means between the die and the mandrel and the introduction of cooling fluid such as water between the seal and the mandrel to flow upwardly as the tube passes along the mandrel. A water vapor atmosphere below the seal provides a controlled atmosphere leaking past the seal which condenses immediately upon passing the seal and coming into contact with the cooling fluid. This controlled atmosphere avoids air leakage past the seal and consequent imperfections in the thermoplastic material tube. |
申请公布号 |
IT1055896(B) |
申请公布日期 |
1982.01.11 |
申请号 |
IT19760020268 |
申请日期 |
1976.02.18 |
申请人 |
GEC |
发明人 |
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分类号 |
B29C55/00;B29B7/00;B29C47/00;B29C47/20;B29C47/88;B29C47/90;B29C49/00;B29C55/26;B29C55/28;B29D23/00;B29L23/00 |
主分类号 |
B29C55/00 |
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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