(19)
(11) EP 1 407 841 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.06.2005 Bulletin 2005/25

(43) Date of publication A2:
14.04.2004 Bulletin 2004/16

(21) Application number: 03253377.0

(22) Date of filing: 29.05.2003
(51) International Patent Classification (IPC)7: B22D 7/00, B22D 27/02, B22D 18/02, B22D 17/00, C22C 1/00
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 25.09.2002 KR 2002058163
16.10.2002 KR 2002063162
17.01.2003 KR 2003003250
04.03.2003 KR 2003013516

(71) Applicant: Chunpyo Hong
Seoul (KR)

(72) Inventors:
  • Chunpyo,Hong 108-502 Daerimhansuptown
    Seoul (KR)
  • Itamura, Masayuki
    Ube-shi, Yamaguchi-ken (JP)

(74) Representative: Browne, Robin Forsythe, Dr. 
Urquhart-Dykes & Lord LLP Tower North Central Merrion Way
Leeds LS2 8PA
Leeds LS2 8PA (GB)

   


(54) Method and apparatus for manufacturing billets for thixocasting


(57) Provided are a method and apparatus for continuously manufacturing quality billets for thixocasting that have a fine, uniform, spherical particle structure, in a short time, with improvements in energy efficiency and mechanical properties, cost reduction, convenience of casting, and shorter manufacturing time. The method involves applying an electric field to a domain (21) of a sleeve (2) defined by first (31) and second (32) plungers inserted through each end of the sleeve and loading a molten metal into the domain of the sleeve to form a semi-solid metallic slurry (51), moving the first plunger toward the second plunger to compress the semi-solid metallic slurry and form a billet (52) via cooling, and shifting the billet toward the second plunger to discharge the billet from the sleeve.






Search report