Method of butt-welding two plastic parts with an identifying code, using an automatically controlled electro-welding machine
US5620625A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 23, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Nov 23, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P90/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is concerned with a method of butt-welding two plastic parts each equipped with an identifying code, using an automatically controlled electro-welding machine. A device for performing a welding program is associated with said machine, said program being implemented as a function of the data contained within the identification codes. The data are defined on the basis of a welding law or standard to be applied as a function of various values for parameters relating at least to the thickness and diameter (or cross section) of the part considered at its abutment end, to the temperatures, lengths of time and welding pressure to be employed, the type of material constituting the part and the index or range of indices of fluidity of said material therefore defining the dynamic viscosity so that it would be possible to butt-weld tube parts if the codes of the parts are recognized as being compatible per se. In addition, it is necessary to be able to prohibit welding if the codes are recognized as being incompatible. Application to the welding of polyethylene tubes in particular.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.