Process and machine for the welding together of plastic parts processing a built-in winding
US4918292A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1989 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Jul 28, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/9592
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to the automatic welding of plastic parts possessing a built-in winding. In order to carry out an automatic welding operation without risking damaging the parts by subjecting them to an excessive welding temperature, there are regulating means for varying the electrical energy supplied to the winding, in order, during the welding phase, to maintain the temperature of the winding between a minimum temperature, below which welding cannot be carried out, and a maximum temperature, beyond which the parts will be damaged. The invention is used particularly for the production of systems for the distribution of gas under pressure by means of plastic pipelines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.