Selective deposition modeling with curable phase change...

Plastic and nonmetallic article shaping or treating: processes – Stereolithographic shaping from liquid precursor

Reexamination Certificate

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C425S174400, C425S375000

Reexamination Certificate

active

06841116

ABSTRACT:
A selective deposition modeling method and apparatus for dispensing a curable phase change material. The dispensing temperature of the material is set at or less than a thermally stable temperature value for the material in which the reactive component of the material remains substantially uncured when held at the temperature for a desired time period. The dispensed material is provided with an environment that enables the material to solidify to form layers of the object. The solidified material is normalized to a desired layer thickness and is then cured by exposure to actinic radiation. In a preferred embodiment a UV curable phase change material is dispensed at about 80° C. and has a viscosity of about 13 to about 14 centipoise at this temperature. The cured material provides substantially increased physical properties over thermoplastic phase change materials previously used in selective deposition modeling.

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patent: WO 0168375 (2001-09-01), None

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