COMPACT PRODUCTION METHOD, INSULATOR FOR SPARK PLUG, AND SPARK PLUG

Japanese Patent JP2016016565

A

PROBLEM TO BE SOLVED: To provide an intermediate which comprises pressuring a raw material powder having as a main component, the inorganic composition powders to be a ceramic after burning, has no trouble such as shape losing and is excellent in machinability enabling large incision and speeding up despite a high strength-required material such as an intermediate to be an insulator for spark plug.SOLUTION: A photosensitive resin whose binding power between powdery particulates composing an intermediate CP1 deteriorates by receiving the irradiation of a prescribed light 110 is used as a binder included in the raw material powders PM. In a grinding process carried out from the intermediate CP1 made by using the binder to become a compact having a prescribed dimension, the surface of the intermediate CP1 is ground by a grind stone 62 while irradiating the surface of the CP1 with the prescribed light 110. Since the binding power between powdery particulates is deteriorated only on the surface of the intermediate in the process of grinding, the machinability of the intermediate is enhanced without shape losing.SELECTED DRAWING: Figure 8

KUZUHA YUI

JP2014139877A

February 01, 2016

July 07, 2014

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NGK SPARK PLUG CO

B28B11/08; B28B1/00; C04B35/632; H01T13/20; H01T13/38; H01T21/02

JP2010135241A	2010-06-17
JP2002324771A	2002-11-08
JPH07292401A	1995-11-07
JPH02275748A	1990-11-09
JPH04180503A	1992-06-26
JP2004025418A	2004-01-29
JPH07258705A	1995-10-09
JPH0624824A	1994-02-01
JPH05114531A	1993-05-07

WO2009119098A1	2009-10-01
WO1999012705A1	1999-03-18

Kazuhisa Kato

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