Title: Process and apparatus for the molding of shaped articles from a composite metallic refractory material

Abstract: Disclosed are a method and apparatus for molding articles in which a highly planar solidification front is desired. A charge of liquefied alloy to be molded into the desired article is placed in a mold and submerged in a heat-exchange bath of liquid metal forming a cylindrical column which is heated in an upper portion and cooled in a lower portion to define an intermediate level at which the bath temperature corresponds to the melting point of the alloy. Upon a progressive lowering of the mold within the bath, a solidification front formed in the alloy at that intermediate level advances from the bottom to the top of the charge.

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Inventors: El Gammal, Maurice (Clamart, FR)
Rabinovitch, Maurice (Chatillon, FR)

Application Number: 822261
Filing Date: 1977-08-05
Publication_date: 1979-11-27
Assignee: O.N.E.R.A. - Office National d'Etudes et de Recherches Aerospatiales (Chatillon, FR)
Primary Class(es): 164/122.2 164/126, 164/348
Other Classes:
US Patent Ref:

3244852	Apr, 1966	Herterick et al.	164/46.
3322183	May, 1967	Johnston et al.	164/80.
3584676	Jun, 1971	Busquet	164/60.
3763926	Oct, 1973	Tschinkel et al.	164/60.
3770047	Nov, 1973	Kirkpatrick et al.	164/60.
3973750	Aug, 1976	Rabinovitch et al.	249/114.

Other Refs:
Primary Examiner: Simpson, Othell M.
Assistant Examiner: Lis, K. Y.
Attorney: Ross; Karl F.