| 摘要 |
A method for manufacturing a sheathed element glow plug is provided to produce a small sized glow plug by using a coaxial connector. A method for manufacturing a sheathed element glow plug the step of allowing a contact tube(6) to be pushed upward by a glow tube(3) of a heating bar(9). Insulating material including magnesium oxides is filled into a hollow space between an inner electrode(2) and an inner electrode introduction part(5) of the contact tube. The contact tube is hardened to prevent the contact tube from being separated from the glow tube. The contact tube has a length so that an end of the contact tube facing a connection part extends beyond an end of a glow plug body facing the connection part.
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