TH11254EX - Electromagnetic induction heating device - Google Patents

Abstract

The electromagnetic induction heater (10) has a heating coil (12) that defines the neck where the metal piece (26) passes through it, moving - to the plastic film coating area. Heated to the coating temperature, the insides of the heating coils (14) are flexible and stretched at different positions by fasteners (64), which are then mounted in a straight motion to and from the metal (26) Each fastener has a corresponding adjustment method (80-88) .The respective placeholder position is adjusted in During heating, which should be automated to To adapt the neck-coil shape to different cross-sections and / or to meet other characteristics of the metal (26) to be heated, thus ensuring a uniform temperature distribution. Through automatic control, each adjustment method (80-88) operates in The associated excitation circuit (90-94), in response to deviation from the reference level of the measured temperature signal. This was obtained by a corresponding gauge (92,98) placed alongside the exposed metal piece (26).

Claims (1)

1. The method for induction heating of long metal pieces consists of the following steps: (a) arrange (i) the induction heating coil has a neck on which the magnetic core of the coil is protruding. The shape of the neck in the transverse plane to the said axis can vary in the direction perpendicular to the magnetic axis of the coil and (ii) the coil modulation device, which is related to the said coil, in order to change the shape of the neck. Such (b) neck reshaping to suit the cross-section of the metal; (c) power to the coil by magnetic induction heating current.