Global Patent Index - EP 0982089 A1

EP 0982089 A1 2000-03-01 - Process for die-casting or thixoforming control

Title (en)

Process for die-casting or thixoforming control

Title (de)

Verfahren zur Prozessüberwachung beim Druckgiessen oder Thixoformen von Metallen

Title (fr)

Procédé de contrôle le processus de couler à pression ou formage thixotropique

Publication

EP 0982089 A1 (DE)

Application

EP 98810846 A

Priority

EP 98810846 A

Abstract (en)

The invention relates to a method for process monitoring during die casting or vacuum thixoforming of metals in a mold, wherein the time lapse of temperature (T) is continuously measured on at least one point of the system and the temperature progression of the system is calculated in real time using a program. The time lapse of the heat flow (W) is calculated from the temperature progression of the system and the time lapse of the energy (U) of the system and the solidification heat portion (UE) of the metal solidified in the mold are calculated from the heat flow. At a given time, the calculated values are used as monitoring parameters.

Abstract (de)

Bei einem Verfahren zur Prozessüberwachung beim Druckgiessen oder Thixoformen von Metallen im Vakuum in einer Form wird der zeitliche Verlauf der Temperatur (T) an mindestens einer Stelle des Systems kontinuierlich gemessen und mittels eines Programmes der Temperaturverlauf des Systems in Echtzeit berechnet. Aus dem Temperaturverlauf des Systems wird der zeitliche Verlauf des Wärmeflusses (W) und aus dem Wärmefluss der zeitliche Verlauf der Energie (U) des Systems sowie der Erstarrungswärmemenge (UE) des in der Form erstarrten Metalls berechnet. Zu einem festgelegten Zeitpunkt berechnete Werte werden als Kennwerte für die Überwachung verwendet. <IMAGE>

IPC 1-7 (main, further and additional classification)

B22D 17/32

IPC 8 full level (invention and additional information)

B22D 17/00 (2006.01); B22D 17/32 (2006.01)

CPC (invention and additional information)

B22D 17/007 (2013.01); B22D 17/32 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT DE FR

EPO simple patent family

EP 0982089 A1 20000301; AT 218081 T 20020615; CA 2341264 A1 20000309; DE 59901565 D1 20020704; DK 1105237 T3 20020923; EP 1105237 A1 20010613; EP 1105237 B1 20020529; ES 2176025 T3 20021116; PT 1105237 E 20020930; US 6557617 B1 20030506; WO 0012246 A1 20000309

INPADOC legal status


2003-10-15 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030415

2002-07-31 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020617

2001-11-14 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ALCAN TECHNOLOGY & MANAGEMENT AG

2000-11-08 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: AT DE FR

2000-11-08 [AXX] PAYMENT OF EXTENSION FEES

- Free text: SI PAYMENT 20000901

2000-11-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000901

2000-03-01 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT DE FR

2000-03-01 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI