Vitreous fused silica
AssigneeVesuvius Crucible Company
InventorsGilbert Brandy, Jean-Claude Compagnon, Jean-Marie Vignot
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Abstract
The invention concerns a new material for molding elements as well as the molds produced in this manner. This material contains more than 30% vitreous fused silica and various adjuvants and binders and presents the advantage of the possibility of modulating the thermal conductivity of the molds. Application to all types of industries utilizing shaping by molding of liquid or paste-like materials, or by the hot deformation of flat products.
Claims5
A mold for use in casting metal shapes comprising a plurality of mold elements for defining the contour of the cast shape, each of said mold elements made from a refractory composition including at least 30% by weight up to 100% by weight vitreous fused silica to obtain a selected coefficient of thermal conductivity in each said mold elements of between about 0.5 and about 10 W/m.degree.C.,
- and wherein selected mold elements adjacent a portion of said cast shape having a first, thinner cross section are of a refractory composition having a lower selected coefficient of thermal conductivity than that of other selected mold elements adjacent portions of said cast shape having a second, heavier cross section whereby heat is extracted from said casting during solidification in a selected manner.
Dependencies are inferred from the claim text.