Title:
ALUMINUM PIPE HAVING EXCELLENT SURFACE QUALITY, METHOD AND APPARATUS FOR MANUFACTURING THE ALUMINUM PIPE, AND PHOTOSENSTIVE DRUM BASE BODY
Document Type and Number:
WIPO Patent Application WO/2005/023446
Kind Code:
A1
Abstract:
A method of manufacturing an aluminum pipe by drawing an extruded material pipe (4) after aluminum billets are extruded to provide the extruded material pipe (4), comprising the steps of cutting the extruded aluminum extruded material pipe (4) at positions within 10 m from the delivery position (M) of an extruding die to provide aluminum extruded material pipes (4) of 10 m or shorter in length (R) and withdrawing the extruded material pipes (4), whereby the aluminum pipe having the excellent surface quality capable of preventing surface defects such as surface discontinuities can be manufactured with an excellent production efficiency.
Inventors:
Iwanaga, Koji c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Gocho, Takeshi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Sagawa, Kunihiro c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Momo, Youichi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Gocho, Takeshi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Sagawa, Kunihiro c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Momo, Youichi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Application Number:
PCT/JP2003/011578
Publication Date:
March 17, 2005
Filing Date:
September 10, 2003
Export Citation:
Assignee:
SHOWA DENKO K.K. (13-9, Shiba Daimon 1-chome Minato-ku, Tokyo, 105-8518, JP)
Iwanaga, Koji c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Gocho, Takeshi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Sagawa, Kunihiro c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Momo, Youichi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Iwanaga, Koji c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Gocho, Takeshi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Sagawa, Kunihiro c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
Momo, Youichi c/o Oyama, Regional Office (Showa Denko K.K. 480, Inuzuka 1-chom, Oyama-shi Tochigi, 323-0811, JP)
International Classes:
B21C23/08; B21C25/00; B21C35/02; (IPC1-7): B21C1/22; B21D3/02
Attorney, Agent or Firm:
Shimizu, Hisayoshi (Idemitsu Nagahori Building, 4-26 Minamisemba 3-chome, Chuo-k, Osaka-shi Osaka, 542-0081, JP)
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