Patent ID: 9662839
Date: 2017-05-30
CPC Classifications: B29C,B33Y

Claim:
1. A solid freeform fabrication system for preparing and dispensing a building material in layers to fabricate a three-dimensional object, the system comprising: preperation apparatus for preparing a building material for solid freeform fabrication, a computer, and fabrication apparatus having at least one printing head configured for receiving said building material and dispensing said building material in layers to fabricate the three-dimensional object; wherein the preparation apparatus comprises: an input unit, for inputting at least one attribute of the building material, said at least one attribute being selected from the group consisting of hardness, elasticity, translucency, polymerizability, viscosity, density, electrical conductivity, magnetization and any collection of two or more thereof; a control unit, configured to transmit data pertaining to respective amounts of a plurality of different materials according to said at least one attribute, said control unit being supplemented with an algorithm for determining said amounts based on said at least one attribute; a supply unit, operatively associated with reservoirs of said plurality of materials and being controllable by said control unit to supply a respective amount of materials according to said data; and a container, configured for receiving said plurality of materials in which said plurality of materials are combined to provide a building material characterized by said at least one attribute, wherein the fabrication apparatus comprises a controller for controlling an operation of said fabrication apparatus based on solid freeform fabrication parameters comprising at least one of (i) a dispensing rate of said building material, and (ii) irradiation intensity tor curing said building material; and wherein said computer is configured for receiving data pertaining to said respective amounts and calculating said solid freeform fabrication parameters according to relative proportions of said different materials in said building material.