Lime-tree preformed shapes for casting aluminum
OwnerJ. Michael McColluminventor
Life of this patent
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Abstract
Preformed silica shapes such as pins and spouts useful in the casting of molten aluminum are provided by which a high strength chemical bond is developed by adding 2 to 10 wt. % of an alkali phosphate-modified alumino-silicate binder to a fused silica mix. To this silica and binder mix, sufficient water is added to obtain a castable consistency. Then, a shape is cast, dried, and shipped for service.
Claims14
An amorphous silica shape used in the casting of molten aluminum, comprising:
- 2 to 10 wt. % of an alkali phosphate modified alumino-silicate binder wherein said binder develops adequate strength for handling and service conditions after simple drying and accommodates the use of plastic and non-plaster molds.
A method for manufacturing a preformed lime-free silica shape useful in the casting of molten aluminum from a dry silica mix, comprising the steps of:
- adding 2 to 10 wt. % of an alkali phosphate-modified alumino-silicate binder to the dry mix wherein said binder develops adequate strength for handling and service conditions after simple drying and accommodates the use of plaster and non-plaster molds,
- adding a sufficient quantity of water to the silica and binder mix to produce a mixture having a castable consistency,
- casting the mixture into a mold conforming to the desired shape, and
- drying the cast shape.
In a fused silica shape for use in the casting of aluminum, the improvement comprising:
- an alkali phosphate-modified alumino-silicate binder wherein said binder develops adequate strength for handling and service conditions after simple drying and accommodates the use of plastic and non-plaster molds.
In a process for producing a fused silica shape for use in the casting of aluminum, the improvement comprising the step of:
- adding an alkali phosphate-modified alumino-silicate binder to the mix wherein said binder eliminates the need for a high temperature firing step and accommodates the use of plaster and non-plaster type molds.
In a fused silica mix for making a shape for use in the casting of aluminum, the improvement comprising:
- the addition of an alkali phosphate-modified alumino-silicate binder wherein said binder develops adequate strength for handling and service conditions after simple drying and accommodates the use of plaster and non-plaster molds.
Dependencies are inferred from the claim text.