Reaction Heat Effect On Initial Linear Shrinkage of Sterelothigraphy Resins

In the industrial use ofthe Stereolithography, the precision is always a problem. Basic phenomenon of the solidification shrink has not suffiCiently investigated This study aims at clarifying the initial linear shrinkage ofcured resin in a minute volume. Experimental equipment has been developed which measures the time history of the single strand in situ in a stereolithography machine. Analysis model about the time history of a minute volume linear shrinkage has been shown using with the measured shrinkage of a cured line segment. The relation between the time history ofthe linear shrinkage and the temperature was measured and the shrinkage in the minute volume after irradiation has been caused by the temperature variation