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 c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Takashima, Nagamitsu c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Hakeda, Kazushige c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Uesugi, Ryoji c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Koike, Yasunori c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Takashima, Nagamitsu c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Hakeda, Kazushige c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Uesugi, Ryoji c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Koike, Yasunori c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Application Number:
PCT/JP2003/008738
Publication Date:
January 15, 2004
Filing Date:
July 09, 2003
Export Citation:
Assignee:
SEIKO EPSON CORPORATION (4-1 Nishi-Shinjuku 2-chome, Shinjuku-ku, Tokyo, 163-0811, JP)
Akahane, Fujio c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Takashima, Nagamitsu c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Hakeda, Kazushige c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Uesugi, Ryoji c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Koike, Yasunori c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Akahane, Fujio c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Takashima, Nagamitsu c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Hakeda, Kazushige c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Uesugi, Ryoji c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
Koike, Yasunori c/o SEIKO EPSON CORPORATION (3-5 Owa 3-Chom, Suwa-Shi Nagano, 392-8502, JP)
International Classes:
B21D17/02; B21D28/24; B21J5/00; B21J5/12; B21K1/00; B41J2/14; B41J2/16; B21D17/00; B21D28/24; B21J5/00; B21J5/06; B21K1/00; B41J2/14; B41J2/16; (IPC1-7): B21J5/02; B21D22/02; B41J2/16
Attorney, Agent or Firm:
Kamiyanagi, Masataka c/o Intellectual, Prorerty Division (SEIKO EPSON CORPORATION 3-5, Owa 3-chom, Suwa-shi Nagano, 392-8502, JP)