Drain and vent holes can be put into the part prior to building with 3D Systems software. The size of drains will vary between 0.100 - 1.000 in. (2.5 - 25 mm) depending on the part size. Vent holes can be small, between 0.050 - 0.100 in. (1.3 - 2.5 mm) is adequate. Multiple vent and drain holes can be used.
Draining the resin from the pattern is crucial to successfully yielding a cast part. The best castings are consistently made from patterns with the highest void ratios. QuickCast style patterns should be drained as soon as possible after they have been built. Delays increase the chance of trapping resin in the pattern. Solid walls or sections thicker than 0.060 in. (1.5 mm) will expand faster than the ceramic shell, exerting forces that can crack the shell. The critical solid thickness depends upon the strength of the shell system used. Removing the uncured liquid resin from sections greater than .060 in. (1.5 mm) is therefore vital.
Please refer to your printer's User Guide for proper draining techniques.
|Note: Taller patterns may not be able to be tilted in the printer (ProX) due to the interference with the elevator.|
SLA system platform draining prior to removal from the system.