Align Technology, Inc.

Michael J Doung

Srinivas Kaza

Shiva Prasad Sambu

Long Phan

Kamesh Tata

Methods for controlling post-processing operations are provided. In some embodiments, a method includes detecting that a plurality of partially cured items have been loaded into a spin station. The plurality of partially cured items can be fabricated from a polymeric resin using a layer-by-layer build process. The method can also include controlling operation of the spin station. The operation can include rotating the plurality of partially cured items on a motor-driven platform so as to separate uncured polymeric resin from the plurality of partially cured items, and collecting the uncured polymeric resin separated from the plurality of partially cured items.

Methods for controling post-processing operations

Methods and systems for post-processing molds are provided. In some embodiments, a method includes using a layer-by-layer build process on a polymeric resin to produce a plurality of aligner molds. The method can include transporting the plurality of aligner molds to a resin removal station. The method can also include applying high pressure air to the plurality of aligner molds to remove residual material from the plurality of aligner molds. The residual material can include excess polymeric resin. The method can further include collecting the excess polymeric resin.

Methods and systems for post-processing appliance molds

A system and method for post-processing of polymeric items having a liquid component and a predetermined heat deflection temperature is provided. The system includes a washing station to spray water at elevated temperature and pressure on the items while maintaining the temperature of the item below the heat deflection temperature. Then using a water distillation system to separate the water from the water mixed with the liquid polymer component by evaporating the water using heating coils with surface that is not conducive to adhesion of the liquid polymer component and then condense the water vapor into liquid water. The system may further include a spin station to separate the liquid polymer component by spinning the item. The system may further include one or more processing stations to rinse the item, dry the item, cure the item, remove the item from a tray to which the item may be attached and clean trays after removing the item. A conveyor system may be used to automate the post-processing of the items.

System for post-processing polymeric items

System for post-processing orthodontic appliance molds

Systems and methods are disclosed for a platform to form a three-dimensional article from successively selectively solidified layers of a liquid medium which is solidifiable by application thereto of a prescribed energy. The platform can be coated or uncoated. The platform can have an array of openings therethrough. Upon completion, the article can be removed from the platform using a punch having a plurality of projections adapted to engage openings in the platform. Alternatively, a tool can be used to push articles from the platform.

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El Cerrito, CA, United States of America

Michael J Doung