Method of forming spark plug boots

Details Method of forming spark plug boots Method of forming spark plug boots

H - Electricity

01

T

18/937

H01T 13/05 (2006.01) B29C 55/24 (2006.01)

Patent

CA 1234265

ABSTRACT A method of forming a spark plug boot which utilizes an extrusion process. An elastomeric tube is extruded, then heated to a partially cured condition. The tube is then cut into individual pieces. The individual pieces are stretched over a pin which has at least one external shoulder. The pin and tube are then heated to a temperature and for a time to provide a final cure. The tube is stripped from the pin. The compression set and shrinkage results in an internal shoulder in the tube, allowing it to serve as a spark plug boot.

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