Powder removal systems
A method includes placing an additively manufactured article having one or more internal channels in a non-reactive liquid to remove remainder powder from within the one or more internal channels, wherein the non-reactive liquid is a gas at room temperature and/or pressure. Placing the additively manufactured article in the non-reactive liquid includes can include placing the additively manufactured article in liquid nitrogen.
1. A powder removal system for an additively manufactured article, comprising:
a thermal container defining a cavity configured to contain a non-reactive liquid and the additively manufactured article within the thermal container, wherein the non-reactive liquid is a gas at room temperature and/or pressure; and
at least one of a vibration device attached to the thermal container or a liquid agitator connected to the thermal container and configured to contact the non-reactive liquid.
2. The powder removal system of claim 1 , wherein the vibration device is an ultrasonic vibration device.
3. The system of claim 1 , wherein the vibration device is disposed on the outside of the thermal container.
4. The powder removal system of claim 1 , wherein the liquid agitator includes a tuyere disposed through the thermal container and having an agitating portion in the cavity.
5. The powder removal system of claim 1 , further including the non-reactive liquid, wherein the non-reactive liquid is liquid nitrogen.