FINE FORGING METHOD, METHOD OF MANUFACTURING LIQUID INJECTION HEAD, AND LIQUID INJECTION HEAD

Title:

FINE FORGING METHOD, METHOD OF MANUFACTURING LIQUID INJECTION HEAD, AND LIQUID INJECTION HEAD

Document Type and Number:

WIPO Patent Application WO/2004/004943

Kind Code:

A1

Abstract:

A fine forging method for precisely forming the partition wall parts of recessed parts and forming a recessed shape for a pressure generating chamber with a high accuracy and a liquid injection head manufactured thereby, the method for forming the groove-like recessed parts (33) arranged at specified pitches comprising the steps of temporarily forming the groove-like recessed parts (33) in a material (55) by a first punch (51a) formed by arranging a temporary forming punch (51b), finish-forming the temporarily formed groove-like recessed parts (33) by a second punch (51c) formed by arranging a finish forming punch (51d), wherein inclined surfaces (63, 64, 65) are provided at the end parts of projected parts (53c, 53d) to precisely provide a finishing shape at the end parts of the groove-like parts (33); the liquid injection head (1) formed by the method wherein the liquid injection characteristics of the liquid injection head are stabilized and a production cost is reduced by simplifying a formation by forging.

Inventors:

AKAHANE FUJIO (JP)
TAKASHIMA NAGAMITSU (JP)
HAKEDA KAZUSHIGE (JP)
UESUGI RYOJI (JP)
KOIKE YASUNORI (JP)

Application Number:

PCT/JP2003/008738

Publication Date:

January 15, 2004

Filing Date:

July 09, 2003

Export Citation:

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Assignee:

SEIKO EPSON CORP (JP)
AKAHANE FUJIO (JP)
TAKASHIMA NAGAMITSU (JP)
HAKEDA KAZUSHIGE (JP)
UESUGI RYOJI (JP)
KOIKE YASUNORI (JP)

International Classes:

B21D17/02; B21D28/24; B21J5/00; B21J5/12; B21K1/00; B41J2/14; B41J2/16; (IPC1-7): B21J5/02; B21D22/02; B41J2/16

Foreign References:

EP1020292A2	2000-07-19
JPH06226975A	1994-08-16
JP2001071044A	2001-03-21
JPS5611130A	1981-02-04
JPS61232028A	1986-10-16

Other References: