Method of and apparatus for processing of semi-solid metal...

Details Method of and apparatus for processing of semi-solid metal... Method of and apparatus for processing of semi-solid metal...

2007-06-05

2007-06-05

Tran, Len (Department: 1725)

Metal founding

Process

Shaping liquid metal against a forming surface

C164S147100, C164S900000

Reexamination Certificate

active

10545217

ABSTRACT:
Apparatus for producing a semi-solid metal alloy from a molten charge includes vertically aligned treatment zones which are provided by vertically aligned passages defined by a plurality of spirally wound flow pipes which are interspersed between spirally wound induction coils. A container is mounted on a charging arrangement which displaces a first charge upwardly into the first treatment zone. Successive charges are introduced in a similar fashion thereby urging the previously introduced charge upwardly along the train of zones and until the leading charge is ejected from the top of the apparatus. The charge in each zone is subjected to controlled cooling and an induced electromagnetic field. The strength of the field and the rate of cooling are controlled to impede dendritic crystallisation and to promote globular primary crystal formation.

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patent: 6443216 (2002-09-01), Lombard et al.
patent: 6796362 (2004-09-01), Lombard et al.
patent: 0 931 607 (1999-07-01), None
patent: 1 050 353 (2000-11-01), None
patent: 2 042 385 (1980-09-01), None

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