Electromagnetic induction heating press-roller

Abstract

The invention discloses an electromagnetic induction heating press-roller, which has an integral double-end supporting structure and comprises a rotating device and a fixing device, wherein the rotating device consists of an action roller and a rotating shaft which are connected; the rotating shaft inputs a rotating torque to drive the action roller to rotate; the fixing device consists of a fixed shaft, a sleeve arranged on the outer side of the fixed shaft, magnetizers and excitation coils; through the magnetizers and excitation coils segmentedly installed outside the sleeve, a magnetic airgap is formed between the outside end face of the fixed magnetizer and the inner circular face of the rotating action roller; the alternating magnetic field forms a circuit through the magnetizer, the air gap and the action roller metal; the magnetic field in the action roller forms an eddy current so as to uniformly heat the working face of the rotating action roller. Since a structure of axially segmented magnetizers and excitation coils is adopted, a magnetic circuit is formed on the working face metal of the heating roller only to avoid the magnetic circuit penetration of the non-heating working part and reduce the excitation current, and simultaneously prevent the machine parts from overheating; besides, the induction heating efficiency can be improved so as to control the axial temperature gratitude of the heating roller continently.

Description

technical field [0001] The invention relates to an electromagnetic induction heating pressure roller. The electromagnetic induction heating pressing roller is used for contacting and pressing the sheet strip material to raise the temperature of the material to be heated. It is especially suitable for hot pressing and heating of film materials. Background technique [0002] In the production process of shaping and compounding film coils, it is necessary to use hot rollers to continuously contact and heat the materials. In actual production, the hot rollers generally use direct electric heating or use oil as a heat transfer medium for heating. With the development of electronic technology, heat rollers using electromagnetic induction heating methods have appeared. Compared with oil heat conduction heating methods, electromagnetic induction heating is easy to control and does not produce oil pollution. [0003] The Intellectual Property Office of the People's Republic of Chin...

AI Technical Summary

Problems solved by technology

[0003] The Intellectual Property Office of the People's Republic of China published the "Electromagnetic Heating Roller" patent (authorized announcement number CN 2622741Y) on June 30, 2004. The electromagnetic heating roller provided is characterized in that the induction coil passes through the coil skeleton, the coil installation shaft and the coil fixing device. Installed in the steel roller body, multiple induction coils are wound on a frame with the axis of the roller as the center. The disadvantage is that the magnetic circuit formed by the induction coil must pass through other parts other than the working surface of the roller, such as the roller When these parts are heated by eddy current, the heating efficiency of the heating roller will be reduced, and at the same time, it will increase the difficulty of temperature control on the working surface of the heating roller.

The temperature of the heating roller is controlled by controlling the calorific value of the electromagnetic heating coil as a heater. The disadvantage is that the heat transfer efficiency of the electromagnetic heating coil to the heating roller is low, and it is difficult to control the temperature of the heating roller. precision

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