Global patent index - EP 0972593 A1

EP 0972593 A1 2000-01-19 - Pressure die-casting method and products obtained thereby

Title (en)

Pressure die-casting method and products obtained thereby

Title (de)

Druckgussverfahren und dabei erhaltene Produkte

Title (fr)

Procédé de coulée sous pression et produits ainsi obtenus

Publication

EP 0972593 A1 (EN)

Application

EP 99810629 A

Priority

JP 19819898 A

Abstract (en)

After a cavity 2 of a die-casting mold 1 is evacuated to exclude gas, oxygen gas is blown into the cavity 2, and then an molten metal 5 is forcibly injected into the cavity 2. The cavity 2 is decompressed to a degree of vacuum not more than 100 millibar by evacuation through a suction nozzle 11. The oxygen gas is blown through a nozzle 14 into the cavity 2 so as to increase a pressure of the cavity 2 higher than the atmospheric pressure. When the molten metal 5 is injected into the cavity 2 clarified in this way, inclusion of gas is perfectly prohibited. As a result, an obtained die-cast products is free from defects such as blowholes or porosity caused by inclusion of gas and so useful as a functional member as well as a structural member. <IMAGE>

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

B22D 17/14

IPC 8 full level (invention and additional information)

B22D 17/14 (2006.01)

CPC (invention and additional information)

B22D 17/14 (2013.01)

Citation (search report)

  • [Y] WO 9010516 A1
  • [Y] GB 1183468 A
  • [X] PATENT ABSTRACTS OF JAPAN vol. 004, no. 033 (M-003), 21 March 1980 (1980-03-21) & JP 55 008382 A (KAWASAKI HEAVY IND LTD), 21 January 1980 (1980-01-21)
  • [X] PATENT ABSTRACTS OF JAPAN vol. 096, no. 012, 26 December 1996 (1996-12-26) & JP 08 215822 A (HITACHI METALS LTD), 27 August 1996 (1996-08-27)
  • [X] PATENT ABSTRACTS OF JAPAN vol. 006, no. 157 (M-150), 18 August 1982 (1982-08-18) & JP 57 072764 A (FUSO LIGHT ALLOYS CO LTD), 7 May 1982 (1982-05-07)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0972593 A1 20000119

INPADOC legal status

2001-05-23 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

- Ref Country Code: DE

- Ref Legal Event Code: 8566

2001-04-18 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20000720

2000-10-04 [AKX] PAYMENT OF DESIGNATION FEES

2000-01-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-01-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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