Spark plug electrode and its method of manufacture

Details Spark plug electrode and its method of manufacture Spark plug electrode and its method of manufacture

B - Operations, Transporting

21

K

205/1, 205/8

B21K 21/08 (2006.01) B21C 23/22 (2006.01) H01T 13/20 (2006.01) H01T 13/39 (2006.01) H01T 21/02 (2006.01)

Patent

CA 1203510

ABSTRACT OF THE DISCLOSURE In a method of making a spark pl.ug centre electrode, a billet (12) of a first metal which has good thermal conductivity is placed within a cup-shaped billet (10) of a second metal having good corrosion resistance, the first metal being melted within the cup-shaped billet of the second metal and, subsequent to cooling, the composite billet is extruded through an extrusion die (17) to form a composite centre electrode in which a core of the first metal is enclosed substantially entirely within a sheath of the second metal.

391650

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