Title:
【発明の名称】押出ダイの製造方法
Document Type and Number:
Japanese Patent JP2740186
Kind Code:
B2
Abstract:
An extrusion die useful for forming helical extrudate particles of inorganic oxide materials, is made by molding the die around pins (34) having helical outer surface (35) to form extrusion holes in the die. Helical walls of the extrusion holes are formed by the helical shape of the pins (34). When the molded die is formed, the helical pins (34) are unscrewed out of the helical holes in the die to avoid damage to the die.
Inventors:
William Edward Bambritsk
Application Number:
JP12080588A
Publication Date:
April 15, 1998
Filing Date:
May 19, 1988
Export Citation:
Assignee:
American Cyanamid Company
International Classes:
B29B9/06; B01J35/02; B01J37/00; B28B3/26; B29C33/00; B29C33/40; B29C33/44; B29C33/76; B29C45/00; B29C45/26; B29C45/44; B29C48/30; B29D1/00; C10G45/04; B29L1/00; B29L31/00; (IPC1-7): B29C45/00; B29C45/44
Attorney, Agent or Firm:
Heiyoshi Odashima