Movable Ferrite Core for Induction Heating Belt Temperature Control

The ferrite core is designed to be movable rather than fixed, allowing it to dynamically adjust its position. During sheet passing, the ferrite core moves to concentrate magnetic flux on the sheet passing area for effective heating. During non-sheet passing periods, it repositions to minimize heat generation in those areas, thus resolving the contradiction between maintaining heat generation capability and preventing unwanted temperature rises.

The ferrite core is divided into multiple segments that can independently move. This segmentation allows different parts of the ferrite core to be positioned differently, enabling precise control over magnetic flux concentration. The segments can be moved to concentrate flux only where sheets are passing, while leaving non-sheet passing areas without intense magnetic flux, thereby reducing harmful heat generation in those regions.

The movable ferrite core can be repositioned according to the size of the sheet being processed. When smaller sheets are used, the ferrite core can be moved inward to concentrate flux on the relevant area. When larger sheets are used, the ferrite core can be extended outward to cover the appropriate width, thus maintaining heating efficiency across different sheet sizes and improving adaptability.

The movable ferrite core structure serves multiple functions: it concentrates magnetic flux for efficient heating, adapts to different sheet sizes by changing position, and prevents excessive heat generation in non-sheet passing areas. This multi-functionality resolves the contradiction between heating efficiency and adaptability by making the system versatile enough to handle various conditions.