Induction heated roll apparatus

Abstract

The invention provides an induction heating roller device, which improves cooling performance in a structure that uniformly cools a roller main body and / or an induction heating mechanism by gas, and is provided with: a roller main body (2); an induction heating mechanism (3) that inductively heats the roller body (2); and a cooling mechanism (7) that cools the roller body (2) and / or the induction heating mechanism (3) by means of a gap (X1) between the roller body (2) and the induction heating mechanism (3). The cooling mechanism (7) has: an introduction port (71) that is formed on one axial end side of the roller body (2) and communicates with the gap (X1); a lead-out opening (72) formed on the other axial end side of the roller body (2) and communicating with the void portion (X1); a suction mechanism (73) that sucks the gas in the void section (X1) from the outlet (72); and a spray supply mechanism (74) that supplies spray to the inlet (71), the inlet (71) being formed in the journal flange (221) on one axial end side of the roller body (2), and the outlet (72) being formed in the journal flange (221) on the other axial end side of the roller body (2).

Description

technical field [0001] The present invention relates to an induction heating roller device. Background technique [0002] For example, in the continuous heat treatment process of continuous materials such as plastic film, paper, cloth, non-woven fabric, synthetic fiber, metal foil, etc. In the heating roller device, an induction heating mechanism is disposed inside a rotating roller body, whereby the peripheral wall portion of the roller body is heated by an induced current. [0003] Furthermore, in recent years, for example, along with changes in the type of continuous material, it is required to change the heating temperature of the roller main body in a short time. In addition, after the heat treatment process is completed, in consideration of safety and sanitation, if the temperature of the roll main body cannot be lowered below a certain temperature, the operator cannot leave the site. Therefore, it is necessary to cool the roll main body in as short a time as possibl...

AI Technical Summary

Problems solved by technology

Although the cooling object is the shell portion of the roll body, the cooling is restricted by the gap between the journal shaft portion and the support shaft of the induction heating mechanism

In particular, if the diameter and / or length of the shell portion of the roller main body is increased, the mass (heat capacity) will increase and a large cooling capacity will be required. gap, but it is difficult to achieve a large cooling capacity

[0011] In addition, in the structure of the above-mentioned Patent Document 2, since the mist-like cooling medium is introduced into the support shaft of the induction heating mechanism, it may be heated and vaporized before reaching the shell portion of the roller body.

This makes it impossible to efficiently capture the latent heat of vaporization from the shell of the roll body, making it difficult to achieve a large cooling capacity

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