FREMGANGSMAATE FOR FREMSTILLING AV ELEKTRISK MOTSTANDSVEISEHYLSER, ANORDNING FOR UTFOERELSE AV FREMGANGSMAATEN, SAMT VED FREMGANGSMAATEN FREMSTILT HYLSE.

摘要

According to the invention, the process for manufacturing sleeves made of plastics material provided with a heating wire is intended to form a connection of electromagnetic - welding comprises the following operations: - a sleeve is molded in a cylindrical shape; - a groove hélicodale is made to the outer surface of the sleeve; - a filament heated beforehand, is put into place at the bottom of the groove; - the plastic material is heated by means of the wire is folded down in order to coat the wire, and to close said groove. / p & & p & the invention also proposes a device for implementing this method. / p & & p & the sleeve of electromagnetic - welding thus obtained is in particular intended to be used not to be molded as a sleeve of current use in particular for the connection of water or with molding as the connection solenoid - weldable, in particular for the gas pipelines.