Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PACK ROLLING METHOD
Document Type and Number:
Japanese Patent JPH02142613
Kind Code:
A
Abstract:

PURPOSE: To remove the difference of brightness between a front and a rear side and to roll an extra-thin sheet by using rolls higher in elastic force or smaller in diameter than working rolls used in a 1st rolling step as working rolls used in a 2nd rolling step.

CONSTITUTION: Two rolling materials 1, 2 are wound respectively independently round reels 7, 8 and 9, 10 and superposed and rolled by working rolls 15, 16 small in diameter supported by lack-up rolls 5, 6 through intermediate rolls 17, 18. Rolling advances and the material 2 only is bitten and released once at a stage one pass before the final pass. Regarding the material 1, an ordinary rolling which is not a pack rolling is performed successively but, simultaneously, the operating rolls of the rolling mill have been changed with the working rolls 15, 16 small in diameter and the intermediate rolls 17, 18 supporting them. Consequently, at least one pass rolling is carried out by the working rolls 15, 16 small in diameter and the difference of brightness between the front and the rear side is dissolved.


Inventors:
YASUDA KENICHI
HIRAMA YUKIO
SATO KOJI
Application Number:
JP29455788A
Publication Date:
May 31, 1990
Filing Date:
November 24, 1988
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
B21B1/32; B21B47/00; (IPC1-7): B21B1/32; B21B47/00
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)