초록 ▼

A method for producing semi-permanent casting tooling, including the steps of blending a high char resin with a refractory powder to form a plastic moldable material; shaping the plastic moldable material to form a green tooling body; and heating the green tooling body to convert the high char resin

A method for producing semi-permanent casting tooling, including the steps of blending a high char resin with a refractory powder to form a plastic moldable material; shaping the plastic moldable material to form a green tooling body; and heating the green tooling body to convert the high char resin into carbon char to form reusable casting tooling. The casting tooling can be used in casting processes including die casting, permanent mold casting and pressure infiltration casting.

대표청구항 ▼

[ What is claimed is:] [1.] A method for directly preparing reusable high density casting tooling comprising the steps of:(1) providing a high char resin, said high char resin having a char yield in a range of from about 60% by weight to about 90% by weight carbon remaining after heating said high c

[ What is claimed is:] [1.] A method for directly preparing reusable high density casting tooling comprising the steps of:(1) providing a high char resin, said high char resin having a char yield in a range of from about 60% by weight to about 90% by weight carbon remaining after heating said high char resin to at least a temperature at which said high char resin decomposes;(2) providing a refractory powder selected from the group consisting of silicon carbide, silicon nitride, titanium carbide, titanium nitride, boron carbide, graphite, zirconia, yttria and mixtures thereof, said refractory powder comprising particles having a mean particle size less than about 180 .mu.m;(3) blending said high char resin with said refractory powder to form a plastic moldable material;(4) shaping said plastic moldable material to form a green tooling body; and(5) heating said green tooling body to convert said high char resin into a carbon char to form directly said reusable high density casting tooling.