Induction Heating Insulation

Induction Heating Insulation

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Caparo Insulation supply high temperature insulation components that are machined or cut from a variety of non-asbestos insulation materials. Ideal for applications requiring continuous operation at high temperatures such as induction coil billet heaters, heat treatment equipment, brazing jigs and melting furnaces.

Induction heating is often used in the heat treatment of metal items. Metal is heated for applications including hardening of steel parts, induction soldering or brazing as a means of joining metal components and induction annealing in order to soften an area of a steel part. Induction heaters consist of an electromagnet through which a high frequency alternating current is passed. The frequency used depends on the size of the object, the metal type and the penetration depth. High power densities can be produced by induction heating which means that required temperatures can be reached in a shorter time. This allows for tight control of the heating pattern and reduced thermal damage or distortion.
An induction coil is a type of electrical transformer used to generate intermittent high voltage from a direct current. Induction coils were first developed in 1836 and were the first type of transformer. Induction coils are used today as the ignition coils in internal combustion engines. In Induction heating, eddy currents are produced to heat objects placed in the interior of the coil. Induction coils are made up of two coils of insulated copper wire wound around an iron core. One core, the primary, is made from relatively few turns of coarse wire. The other coil, the secondary, consists of many turns of fine wire. A direct current is then passed through the primary coil, creating a magnetic field. This current is repeatedly interrupted by a vibrating mechanical contact (an interruptor) causing the magnetic field to rapidly collapse. This causes a high voltage pulse, typically many thousands of volts, across the secondary coil through electromagnetic induction. Due to this, metallic components are kept to a minimum and are non ferrous in nature. The induction boxes and associated parts are made from non metallic insulation components.