Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1996-02-07
1998-10-06
Aftergut, Jeff H.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
1563082, 1563084, 264497, B27N 300, B32B 3100
Patent
active
058172068
ABSTRACT:
A powder for use in selective laser sintering, from which prototype articles and masters for molds may be formed, is disclosed. The powder is formed by spray drying a polymer emulsion to yield a distribution of particles of substantially spherical shape. The powder is then air classified to remove excessively small particles from the distribution; the powder may also be screened to remove large particles therefrom, as well. The resulting distribution of particle sizes, by volume, preferably has a mean particle size of between about 20.mu. and about 50.mu., with preferably less than about 5% (by volume) of its particles with a size of less than about 15.mu. and less than about 2% (by volume) of its particles with a size of greater than about 75.mu.. The powder is subjected to selective laser sintering to produce an article of approximately 55% to 75% of theoretical density. The article may be used as a prototype article or part, or as a pattern or master for a mold.
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Booth Richard B.
Forderhase Paul F.
McAlea Kevin P.
Aftergut Jeff H.
DTM Corporation
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