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US 8,211,226 B2Granted
Cement-based materials system for producing ferrous castings using a three-dimensional printer
AssigneeMassachusetts Institute of Technology
InventorsJames F. Bredt, Michael J. Tarkanian, Mahati Chintapalli
Life of this patent
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Abstract
Mixture for use in a three-dimensional printer to make molds suitable for producing ferrous coatings. The mixture includes cement, sand and accelerator. Grain sizes of the cement, sand and accelerator are selected to assure that the three-dimensional printer generates coherent layers.
Claims19
A mixture for use in a three-dimensional printer to make molds suitable for producing ferrous castings comprising:
- a cement;
- a sand;
- and
- an accelerator wherein grain sizes of the cement, sand and accelerator are selected so that approximately one-third of the bulk volume of the mixture comprises particles in the size range of 75-300 μm;
- approximately one-third in the size range of 25-75 μm, and approximately one-third in the size range of 25 μm and below.
2 more elements
Dependencies are inferred from the claim text.