CONTROLLER FOR ELECTRIFICATION OF ELECTROFUSION JOINT, ELECTRIFICATION CONTROL METHOD, AND PIPE MEMBER MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To disclose an electrification controller which can suppress degradation of resin attributed to overheating by a heating wire and occurrence of poor joining owing to unsatisfactory heating.;SOLUTION: An electrification controller is a device for controlling electrification of a heating wire of an electrofusion joint when supplying electric power to the heating wire to join the electrofusion joint with a pipe by fusion. The electrification controller comprises: a basic control function of raising, by electrification, a resistance value of the heating wire to a target resistance value and then, keeping the target resistance value for a fixed length of time; and a keeping-control-starting function of starting keeping control of the resistance value of the heating wire at a point of time when the resistance value of the heating wire becomes a value between 90% and 98% of the target resistance value in raising, by electrification, the resistance value of the heating wire to the target resistance value.;SELECTED DRAWING: Figure 5;COPYRIGHT: (C)2019,JPO&INPIT