| 摘要 |
PCT No. PCT/FR93/00518 Sec. 371 Date Nov. 23, 1994 Sec. 102(e) Date Nov. 23, 1994 PCT Filed May 28, 1993 PCT Pub. No. WO93/24301 PCT Pub. Date Dec. 9, 1993The 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.
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