Global Patent Index - EP 1838477 A4

EP 1838477 A4 2009-02-25 - ROBUST CONTROL METHOD OF MELT LEVEL IN THE TWIN ROLL STRIP CASTER

Title (en)

ROBUST CONTROL METHOD OF MELT LEVEL IN THE TWIN ROLL STRIP CASTER

Title (de)

ROBUSTES STEUERVERFAHREN DER SCHMELZENHÖHE BEI EINER DOPPELROLLENSTRANGGIESSVORRICHTUNG

Title (fr)

PROCEDE DE COMMANDE ROBUSTE DU NIVEAU DE MATIERE FONDUE DANS UNE MACHINE DE COULEE DE BANDES A DEUX ROULEAUX

Publication

EP 1838477 A4 (EN)

Application

EP 05821838 A

Priority

  • KR 2005004551 W
  • KR 20040113652 A

Abstract (en)

[origin: WO2006071039A1] The present invention provides a robust control method for maintaining a melt level at a constant value in a mold in a twin roll strip casting process. In the twin roll strip casting process, whether using a stopper system (3), which is provided in a tundish (2) to supply melt into the mold, or using a camera system, which measures the melt level in the mold, the robust control method of the present invention controls the melt level both using an advanced controller, which controls, at an initial stage of the casting process or when a disturbance arises, the target value of the melt level such that the target level corresponds to the performance characteristics of the melt level control system, and using a feedback controller, which maintains the melt level at a constant value under normal casting conditions.

IPC 8 full level (invention and additional information)

B22D 11/16 (2006.01)

CPC (invention and additional information)

B22D 11/185 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

EPO simple patent family

WO 2006071039 A1 20060706; AU 2005320407 A1 20060706; CN 101094738 A 20071226; EP 1838477 A1 20071003; EP 1838477 A4 20090225; JP 2008525200 A 20080717; KR 100721919 B1 20070528; KR 20060075093 A 20060704; US 2007295473 A1 20071227

INPADOC legal status


2009-11-04 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20090424

2009-02-25 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20090127

2008-04-02 [DAX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT (TO ANY COUNTRY) (DELETED)

2007-10-03 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20070611

2007-10-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR