Title: Fluoride-type with heat sink for casting molten reactive and refractory metals

Abstract: A mold for casting molten reactive and refractory metals has a facing portion comprising finely divided particles of the fluorides and oxyfluorides of the metals of Groups, Ia, IIa, and IIIa, including the lanthanide and actinide series, of the Periodic Chart (after Mendeleeff) and a back-up portion comprising finely divided particles of shell mold back-up material. The fluoride and oxyfluoride content of the facing portion is essentially inert to titanium and other reactive and refractory molten metals and hence minimizes contamination by mold degradation products of metal objects cast in the mold. SP This is a continuation-in-part of application Ser. No. 448, 254, filed Mar. 5, 1974, now abandoned; the same being a continuation of application Ser. No. 332,608, filed Feb. 15, 1973, now abandoned; which in turn is a continuation of application Ser. No. 174,662 filed Aug. 25, 1971, now abandoned.

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Inventors: Brown, Robert A. (Scio, OR, US)

Application Number: 601335
Filing Date: 1975-08-01
Publication_date: 1977-12-20
Assignee: Rem Metals Corporation (Albany, OR)
Primary Class(es): 106/38.3 106/38.27, 106/38.9, 164/23
Other Classes:
US Patent Ref:

2912729	Nov, 1959	Webb	106/38.
3164872	Jan, 1965	Greenwald	106/38.
3537949	Nov, 1970	Brown et al.	106/38.
3854961	Dec, 1974	Flasch	106/38.

Other Refs:
Primary Examiner: Hayes, Lorenzo B.
Assistant Examiner:
Attorney: Farley; Eugene D.