Resin encapsulated capacitors - mfd. by dipping heated in resin powder and pressing to shape in mould

摘要

Electrical capacitors are encapsulated in a thermosetting plastic, preferably an epoxy resin, by a preliminary covering of the capacitor with resin, followed by introducing it in a press mould and curing the plastic. The preliminary covering is achieved by heating the capacitor and by dipping it, suspended from the connecting leads, one or more times into a resin powder. An alternative method is an electrostatic process to envelop the capacitor by a fused or sintered powder layer. The resin includes preferably a suitable filler. This is a simple method of producing thin, uniform and smooth coverings of capacitors.