METHOD OF PRODUCING DIE FOR PRODUCING LIQUID-JETTING HEAD AND MATERAL BLOCK FOR THE DIE

WIPO Patent Application WO/2005/002755

A1

A method of producing a die for producing a liquid-jetting head and a material block for the die, where die durability is equalized on a die-by-die basis and the level of the durability is drastically improved. The method of producing a die for producing a liquid-jetting head performs plastic working of a metal-made pressure producing chamber-forming plate (30) where groove-like recess portions (33) functioning as pressure-producing chambers (29) are formed. The metallic material of a producing die (51) is a rectangular parallelepiped-shaped material block (56) having a flat end surface (65). The material block (56) has longitudinal, lateral, and height dimensions from which producing dies (51) can be cut out with the dies arranged in longitudinal and lateral directions. The producing dies (51) are cut out from the material block (56) such that distances between each of processing/forming portions (53, 53b) of a producing die (51) and the end surface (65) are substantially equal. As a consequence, the material block (56) is smaller, cooling speeds during quenching and tempering are equalized, and a metal structure is stabilized.

TAKASHIMA NAGAMITSU (JP)
UESUGI RYOJI (JP)

PCT/JP2004/009590

January 13, 2005

June 30, 2004

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SEIKO EPSON CORP (JP)
TAKASHIMA NAGAMITSU (JP)
UESUGI RYOJI (JP)

B21C23/14; B21C23/20; B22F3/15; B22F5/00; B41J2/16; (IPC1-7): B21J13/02; B21D22/02; B21D37/20; B21J5/02

JPH11245232A	1999-09-14
JPH02268929A	1990-11-02
JPH08104009A	1996-04-23
JPH0839359A	1996-02-13
JPH08238776A	1996-09-17
JPH09311459A	1997-12-02
JPH1136005A	1999-02-09

Miyakoshi, Noriaki (12th Floor ARK Mori Building, 12-32, Akasaka 1-chom, Minato-ku Tokyo, JP)

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