Title:
CONTROLLER FOR ELECTRIFICATION OF ELECTROFUSION JOINT, ELECTRIFICATION CONTROL METHOD, AND PIPE MEMBER MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2018156741
Kind Code:
A
Abstract:
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
Inventors:
UMEDA KAZUNORI
MANO NARIAKI
ENDO TOMOYUKI
MANO NARIAKI
ENDO TOMOYUKI
Application Number:
JP2017050353A
Publication Date:
October 04, 2018
Filing Date:
March 15, 2017
Export Citation:
Assignee:
MITSUBISHI CHEM INFRATEC CO LTD
REX IND CO
REX IND CO
International Classes:
H05B3/40; B29C65/34; F16L47/03
Attorney, Agent or Firm:
Noriyuki Yamamoto
Akihiko Yamashita
Kishimoto Tatsuto
Akihiko Yamashita
Kishimoto Tatsuto