Process for welding thermoplastic materials with projection of hot gas
US5298713A · kind A · utility
6Cited by
7References
10Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jun 18, 1992 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Jun 18, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/919
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The process of welding at least two elements of thermoplastic materials includes the step of heating, for projection on the welding area, a flow of projection gas comprising at least 20% helium, the balance consisting of a neutral gas or a mixture of neutral gases. For welding applications with a welding strand, the projection gas is heated at a temperature between 200.degree. and 350.degree. C. For applications involving the production of filamentary windings, the projection gas is heated at a temperature higher than 1000.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.