METHOD FOR INSPECTING MOLTEN PART AND METHOD FOR CONTROLLING ENERGIZATION

摘要

PROBLEM TO BE SOLVED: To provide a method for inspecting molten part capable of accurately deciding whether a necessary thickness of the part having a sufficient strength to connect is formed or not in substantially overall area of the molten connected part while melting an EF joint and a PE tube. SOLUTION: The method for inspecting a molten part comprises the steps of previously detecting a time for reciprocating a ultrasonic wave at a distance from a molten boundary surface of a non-molten part and the molten part of a synthetic resin member and a surface of a synthetic resin member when the boundary surface is located at a predetermined position, checking whether an echo signal from the member is received within a predetermined time after the lapse of the reciprocating time after receiving the echo signal from the surface of the member each time of receiving the wave in a thickness direction of a synthetic resin joint or a synthetic resin tube, and deciding that the part is a predetermined thickness when signal received.