Fabrication of three-dimensional objects by irradiation of radiation-curable materials
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United States of America Patent
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Apr 15, 2003
Grant Date -
N/A
app pub date -
Feb 8, 2000
filing date -
Feb 8, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Improved apparatus are diclosed for stepwise, layer by layer fabrication of three-dimensional objects by irradiation of radiation-curable materials, in which the critical steps of fast and efficient deposition of thin, flat layers of material covered with a radiation-transmitting film, as well as careful separation of the film upon irradiation, are achieved by using a reciprocating carriage that during its motion changes the elevation of the film. When the carriage is moving in one direction, the film is being laid down forming a layer, and when upon irradiation the carriage is returning, it is peeling the film off without distorting the formed layer. Improved apparatus are provided that build the whole object on an open platform without using a container or form each layer above container.
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