Title:
CONTROLLER FOR ELECTRIFICATION OF ELECTROFUSION JOINT, ELECTRIFICATION CONTROL METHOD, AND PIPE MEMBER MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2018156740
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 target resistance value-correcting function of correcting the target resistance value according to an environment temperature. The target resistance value-correcting function is arranged so that when the environment temperature is lower than a reference temperature, the target resistance value is corrected to become higher than a reference, and when the environment temperature is higher than the reference temperature, the target resistance value is corrected to become lower than the reference.SELECTED DRAWING: Figure 3
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Inventors:
UMEDA KAZUNORI
MANO NARIAKI
ENDO TOMOYUKI
MANO NARIAKI
ENDO TOMOYUKI
Application Number:
JP2017050340A
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