Methods and apparatus for washing objects produced by stereolithography

An apparatus useful for washing residual resin from the surface of an object produced by stereolithography, the apparatus comprising:

• a carrier platform with said object adhered thereto;
• a wash vessel configured to receive said object adhered to said carrier platform that has been transferred from an additive manufacturing apparatus where said object was produced on said carrier platform;
• a reservoir positioned below said wash vessel and configured to contain at least sufficient wash liquid to fill said wash vessel;
• a drain line connecting said wash vessel to said reservoir, said drain line having a valve operatively associated with said drain line;
• an object agitator on which said carrier platform is mounted, said object agitator having an agitator drive operatively associated therewith;
• an elevator operatively associated with said object agitator and configured to lower said carrier platform into said wash vessel, said elevator having an elevator drive operatively associated with said elevator;
• and
• a pneumatic pressure supply operatively associated with said reservoir, with said reservoir and said drain line configured to fill said wash vessel with wash liquid through said drain line when said pneumatic pressure supply is activated,
• wherein said wash vessel and said reservoir are in fluid communication only via said drain line.