Bush for directing a stream of molten metal into a mold
AssigneeReynolds Wheels S.p.A.
InventorDavid J. Edwards
Life of this patent
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Abstract
Molten metal is either poured or injected into the cavity of a permanent mold by way of a bush which comprises a metal sleeve, anchored to the mold itself, a first tubular element of ceramic material lodged internally of the sleeve, and a second tubular element, also ceramic, coaxial with the first. The stream of metal passes from a feeder into the inlet end of the bush, through the first and then the second ceramic element, and enters the cavity ultimately from an outlet end consisting of a metal annular element connected in a precise and effectively fluid-tight fit with the corresponding end of the second tubular element.
Claims12
A bush for directing a stream of molten metal into a mold, comprising:
- (a) a metal sleeve secured to the mold;
- (b) a first ceramic tubular element disposed within said metal sleeve, said first tubular element having an outer surface of cylindrical shape and an inner surface of frustoconical shape;
- (c) a second ceramic tubular element disposed adjacent to said first tubular element, said second tubular element having an outer surface of cylindrical shape and an inner surface having at least three frustoconical shaped portions;
- (d) a metal annular element disposed adjacent to said second tubular element such that said second tubular element is disposed between said first tubular element and said annular element, said annular element having an outer surface, a portion of said annular element outer surface having a frustoconical shape, one of said frustoconical shaped portions of said second tubular element mating with said frustoconical outer surface of said annular element to form a seal.
Dependencies are inferred from the claim text.