Title:
【発明の名称】連続鋳鋼設備用管状チルの製造法
Document Type and Number:
Japanese Patent JPH0771698
Kind Code:
B2
Abstract:
A method is described for the preparation of tubular copper or copper-alloy chills or ingot moulds shaped with their longitudinal axis substantially curved, and comprising a first stage in which the end of a tubular semi-finished product of rectilinear axis is turned-over by cold plastic deformation; a second stage in which said semi-finished product is shaped to give it a curved form; a third stage in which a mandrel having the same shape and outer dimensions as the chill to be obtained is then inserted into said semi-finished product; a fourth stage in which said semi-finished product is passed through an extruder die of such dimensions as to deform the material of said semi-finished product in order to cause the inner surface of said semi-finished product to adhere closely to the outer surface of said mandrel; and a fifth stage in which when said semi-finished product has passed through said die, a substantially axial force is exerted on said mandrel in the opposite direction to the force exerted in the preceding stage, while the end edge of said semi-finished product is rested against counteracting sectors disposed below said die.
Inventors:
Pierluigi Ratsellini
Application Number:
JP14849684A
Publication Date:
August 02, 1995
Filing Date:
July 16, 1984
Export Citation:
Assignee:
Europa Metalery-Erre Emme Jetsé Pi A
International Classes:
B21C23/12; B21C45/00; B21D9/05; B21C23/14; B21D9/12; B22D11/04; B22D11/041; B22D11/057; (IPC1-7): B21D9/05; B21C23/12; B22D11/04
Domestic Patent References:
| JP5180666A | ||||
| JP59202140A | ||||
| JP462822B2 | ||||
| JP5027031B2 |
Attorney, Agent or Firm:
Hiroshi Tanaka (1 outside)