METHOD OF MANUFACTURING SPARK PLUG

摘要

A method of manufacturing a spark plug, comprising the steps of positioning a linear precious metal member (32') formed of a precious metal or a precious metal alloy forming an ignition part (32) at the tip part (4a)(fixed part) of the earthed electrode (4) of a spark plug work (100') and cutting the linear precious metal member (32') after fixing the linear precious metal member (32') by resistance welding or laser welding.