3D printer with pressure-assisted fluid extraction
A three-dimensional (3D) printer and method are provided, including a substrate, a liquid deposition device configured to deposit a liquid dispersion including a suspension of a particulate material in a liquid vehicle, the liquid vehicle including a solvent but devoid of a binder material, onto the substrate to form a non-patterned layer on the substrate, a solvent removal device configured to remove at least a portion of the solvent from the liquid vehicle from the non-patterned layer to form a dried non-patterned layer, and a liquid binder print head configured to deposit a liquid binder onto the dried non-patterned layer to form a printed pattern on the dried non-patterned layer.
1. A three-dimensional (3D) printer, comprising:
a receiver device, the receiver device configured to receive a substrate;
a liquid deposition device comprising a coating device configured to deposit a liquid dispersion onto the substrate to form a non-patterned layer on the substrate;
wherein the liquid dispersion includes a suspension of a particulate material in a liquid vehicle, the liquid vehicle includes a solvent and is devoid of a binder material;
a solvent removal device, the solvent removal device configured to use a pressure differential to remove at least a portion of the solvent from the liquid vehicle from the non-patterned layer to form a dried non-patterned layer; and
a print head configured to deposit a liquid binder onto the dried non-patterned layer to form a printed pattern on the dried non-patterned layer;
wherein the coating device coats the liquid dispersion onto the substrate with particulate material comprising particles that are approximately 5 μm or less in diameter.
2. The 3D printer of claim 1 , wherein the solvent removal device is configured to apply pressure on one surface of the substrate to remove the at least a portion of the solvent from the liquid vehicle from the non-patterned layer such that the particulate material comprises at least 40% by volume of the liquid dispersion.
3. The 3D printer of claim 1 , wherein the solvent removal device is configured to apply pressure on opposite surfaces of the substrate to remove the at least a portion of the solvent from the liquid vehicle from the non-patterned layer.
4. The 3D printer of claim 1 , wherein the solvent removal device comprises a vacuum liquid extraction device configured to evacuate low viscosity constituents of the liquid dispersion leaving the particulate material comprising of mono-sized particles to remain on the dried non-patterned layer.
5. The 3D printer of claim 1 , wherein the solvent removal device comprises a vacuum liquid extraction device configured to evacuate low viscosity constituents of the liquid dispersion leaving the particulate material comprising of multiple-sized particles to remain on the dried non-patterned layer.
6. The 3D printer of claim 1 , wherein the coating device of the liquid deposition device is configured to deposit the liquid dispersion, wherein the liquid dispersion comprises a first liquid dispersion and a second liquid dispersion, and wherein the coating device is configured to deposit:
the first liquid dispersion including a suspension of a particulate material having particles having a first diameter; and
the second liquid dispersion including a suspension of a particulate material having particles having a second diameter; and
wherein the second diameter is smaller than the first diameter.
7. The 3D printer of claim 1 , wherein the coating device is configured to deposit the liquid dispersion, wherein the liquid dispersion comprises a dispersant configured to improve rheological properties of the liquid dispersion and enable uniform distribution of the particulate material on the substrate, and wherein the solvent removal device comprises a vacuum liquid extraction device configured to evacuate low viscosity constituents of the liquid dispersion.
8. The 3D printer of claim 1 , further comprising a curing device positioned downstream from the solvent removal device, the curing device being configured to solidify the liquid binder in the printed pattern after the print head has deposited the liquid binder onto the dried non-patterned layer.
9. The 3D printer of claim 1 , wherein the solvent removal device is configured to apply at least one of pressure and heat to the non-patterned layer to remove the at least a portion of the solvent from the liquid vehicle to densify the non-patterned layer during solvent removal.
10. The 3D printer of claim 9 , wherein the solvent removal device is configured to densify the non-patterned layer during solvent removal by applying the pressure differential to a surface of the non-patterned layer opposite the substrate to remove a portion of the liquid vehicle from the liquid dispersion.
11. The 3D printer of claim 10 , wherein the solvent removal device includes a pressure plate.
12. The 3D printer of claim 9 , wherein the solvent removal device is configured to leave a portion of the solvent in the liquid dispersion as a lubricant in the dried non-patterned layer.
13. The 3D printer of claim 9 , wherein the solvent removal device comprises a vacuum chamber and a liquid-permeable support, the vacuum chamber and the liquid-permeable support being positioned on a side of the substrate opposite to the liquid deposition device, and wherein the pressure differential is applied to a surface of the non-patterned layer causing the solvent to be forced through the liquid-permeable support and into vacuum chamber to dry the non-patterned layer.
14. The 3D printer of claim 1 , further comprising a pair of conditioning devices, each of the pair of conditioning devices positioned on opposite surfaces of the receiver device and the substrate and configured to compact the dried non-patterned layer after solvent removal by the solvent removal device.
15. The 3D printer of claim 14 , wherein at least one of the pair of conditioning devices is further configured to include a heater device to evaporate any remaining portions of liquid vehicle from the non-patterned layer.
16. The 3D printer of claim 1 , wherein the solvent removal device comprises a vacuum chamber and a liquid-permeable support, the vacuum chamber and the liquid-permeable support being positioned on a side of the substrate opposite to the liquid deposition device.
17. The 3D printer of claim 1 , further comprising a transfer device, the transfer device is configured to transfer the printed pattern to a build station.
18. The 3D printer of claim 17 , wherein the transfer device is configured to transfer a dried printed pattern from the receiver device to the top of a stack of previously transferred dried printed patterns.
19. The 3D printer of claim 17 , wherein the transfer device is configured to include a roller and a carrier to support and move the roller vertically.
20. The 3D printer of claim 1 , wherein the coating device is selected from one of the following: aerosol spraying coater, ultrasonic spray coater, blade coater, curtain coater, and slot die coater.