Title:
PUNCH FOR BORING NOZZLE HOLES ON SPINNERET
Document Type and Number:
Japanese Patent JPS5649007
Kind Code:
A
Abstract:
PURPOSE: A punch for boring holes that is made of cemented carbide is coated with titanium nitride on the surface in a specified thickness through ion-plating process, thus producing the titled punch free from seizing and breaking at the top edge.
CONSTITUTION: A punch 1 made of cemented carbide used for boring nozzle holes on a spinneret is coated with titanium nitride films 4 by the ion-plating method in a thickness of 0.01W1μ.
Inventors:
YAMAZAKI HARUKI
Application Number:
JP12122879A
Publication Date:
May 02, 1981
Filing Date:
September 20, 1979
Export Citation:
Assignee:
TANAKA PRECIOUS METAL IND
International Classes:
B26F1/16; B21D28/24; B21D28/34; B21D37/01; B21D37/02; B26F1/14; D01D4/00; D01D4/02; (IPC1-7): B21D28/34; B21D37/02; B26F1/14; D01D4/02
Domestic Patent References:
| JPS527879A | 1977-01-21 | |||
| JPS5294878A | 1977-08-09 |