Resistive implant welding of thermoplastic materials with...

B - Operations – Transporting – 29 – C

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B29C 65/34 (2006.01)

Patent

CA 2707714

A method for forming butt joints between thermoplastic members by resistive implant welding. A tongue is formed on one member to be joined and a complementary groove is formed in the other member. A resistive implant is placed between the tongue and the groove which are then pressed together by an applied pressure. An electric current is run through the resistive implant to melt a portion of the thermoplastic material of both the tongue and groove, and the melted plastic intermingles through the implant. When the electric current is removed, the plastic cools, forming a weld.

L'invention concerne un procédé de formation de joints bout à bout entre des éléments thermoplastiques grâce à un soudage d'implant résistif. Une languette est formée sur un élément pour être jointe et une rainure complémentaire est formée dans l'autre élément. Un implant résistif est placé entre la languette et la rainure qui sont alors pressées l'une contre l'autre grâce à la pression appliquée. On fait circuler un courant électrique au travers de l'implant résistif pour faire fondre une partie du matériau thermoplastique tant de la languette que de la rainure et les entrelacements de matière plastique fondue d'un côté à l'autre de l'implant. Lorsque l'on supprime le courant électrique, la matière plastique se refroidit, formant une soudure.

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