Patent ID: 8939808
Filing Date: 2015-01-27
Classification: H01T

Abstract:
1. A method for manufacturing a spark plug comprising: a tubular insulator extending in the direction of an axis; a tubular metallic shell provided around the insulator; and talc charged between the insulator and the metallic shell, the method comprising: a talc pressing step of pressing the talc along the direction of the axis using a tubular talc pressing jig in a state in which the metallic shell having the insulator inserted thereinto is supported by a tubular receiving member, wherein the receiving member is made movable in relation to the talc pressing jig in the radial direction of the receiving member at least when the talc is pressed by the talc pressing jig; and the talc pressing step including an eccentricity adjusting step of reducing an eccentricity between a center axis of the talc pressing jig and the axis of the insulator in the radial direction.