01-99 Shellac Mould Plate

Composition

01-99 plate is a Class B hot forming moulding plate. It is made with partially cured shellac binder generally between 10 to 22 %. It softens under heat to facilitate good moulding. There are different grades of 01-99 mould plate available depending upon the type of mica used, binder content, and surface characteristics.

Applications

For hot moulding of intricate parts such as mica commutator cones or V-rings, end bell insulation, slot cells, coil forms and tubes

Processing

The layout consisting of the required number of layers of thin mica moulding plates (cut to definite shape) is set in a pre-determined pattern. It is then heated uniformly to a temperature of 130°C – 160°C till it becomes soft. It takes the required form when moulded under pressure.

It retains its form when cooled under pressure. The duration, temperature and pressure will have to be determined by application. These moulded parts, if required, can be fully cured under heat and pressure for several more hours to develop their full properties.

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