Title:
スパークプラグ及びその製造方法
Document Type and Number:
Japanese Patent JP5216088
Kind Code:
B2
Abstract:
There are provided a spark plug in which a plating film applied to a ground electrode can be relatively easily removed, without cost increase, to prevent deterioration in ignition performance, and a process for producing the spark plug. A spark plug 1 has a metal shell 3, a ground electrode 27 made of a Ni alloy and a Ni plating layer 28 containing Ni as a main component and applied to surfaces of at least a rear end portion of the ground electrode 27 and of the metal shell 3. A Ni plating film 41 applied to a center-electrode-side part of a portion of the ground electrode 27 to be bent has been irradiated with a laser beam or the like, thereby forming a molten layer 29 in which metal materials of the Ni plating film 41 and the ground electrode 27 are molten together on the center-electrode-side part of the portion of the ground electrode 27 to be bent. The Ni plating layer 28 is formed on a part of the ground electrode 27 other than the part irradiated with the laser beam.
Inventors:
Taido Meiwa
Kato Tomoaki
Kato Tomoaki
Application Number:
JP2010519036A
Publication Date:
June 19, 2013
Filing Date:
December 11, 2009
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
H01T13/20; F02P13/00; H01T13/39; H01T21/02
Domestic Patent References:
| JP2005293954A | 2005-10-20 | |||
| JPH08236263A | 1996-09-13 | |||
| JPH0711409A | 1995-01-13 |
Attorney, Agent or Firm:
Mitsuo Kawaguchi