PRINTER DEVICE USING ACOUSTIC LEVITATION

1 . A printing apparatus using acoustic levitation, the printing apparatus comprising:

an acoustic levitation unit, which comprises at least one acoustic wave generator and is configured to generate an acoustic field to levitate at least one printing material and form print layers having specific patterns;

a material supply unit configured to supply the printing material; and

a placing unit comprising a plate, wherein the print layers are sequentially stacked on the plate.

2 . The printing apparatus of claim 1 , further comprising a photo-curing unit configured to cure the print layers stacked on the plate by irradiating light toward a path in which the plate moves.

3 . The printing apparatus of claim 1 , further comprising a control unit configured to generate pattern information of the print layers according to a stacking order by using shape information regarding an object to be fabricated and thickness information of the printing material, and to control the acoustic levitation unit to generate the acoustic field in correspondence with the pattern information.

4 . The printing apparatus of claim 3 , wherein, when the placing unit approaches the acoustic levitation unit at a pre-set distance or less, the control unit drops the print layer by controlling the acoustic levitation unit.

5 . The printing apparatus of claim 1 , further comprising a vertical driving unit configured to move the plate up and down.

6 . The printing apparatus of claim 1 , wherein the material supply unit is provided adjacent to the acoustic levitation unit to supply the printing material toward the acoustic field.

7 . The printing apparatus of claim 1 , wherein

the material supply unit is connected to the acoustic levitation unit and supplies the printing material to the acoustic levitation unit, and

the acoustic levitation unit simultaneously generates the acoustic field and supplies the printing material to the acoustic field.

8 . A printing apparatus using acoustic levitation, the printing apparatus comprising:

an acoustic levitation unit, which comprises one or more acoustic wave generators and a planar driving unit configured to move the acoustic wave generators in at least one of a first direction and a second direction crossing the first direction, and is configured to generate an acoustic field to levitate one or more printing materials;

a placing unit comprising a plate on which the printing material is placed; and

a control unit configured to control the acoustic levitation unit such that the printing material is placed on the plate in correspondence with shape information regarding an object to be fabricated.

9 . The printing apparatus of claim 8 , wherein the control unit generates pattern information of print layers according to a stacking order by using shape information regarding the object to be fabricated and thickness information of the printing material, and controls the acoustic levitation unit to generate the acoustic field in correspondence with the pattern information or to move the acoustic wave generators.

10 . The printing apparatus of claim 8 , further comprising a material supply unit provided adjacent to the acoustic levitation unit and configured to supply the printing material toward the acoustic field.

11 . The printing apparatus of claim 8 , further comprising a material supply unit connected to the acoustic levitation unit to supply the printing material to the acoustic levitation unit,

wherein the acoustic levitation unit simultaneously generates the acoustic field and supplies the printing material to the acoustic field.

12 . The printing apparatus of claim 8 , further comprising a photo-curing unit configured to cure the printing material stacked on the plate by irradiating light toward a path in which the plate moves.

13 . The printing apparatus of claim 8 , further comprising a vertical driving unit configured to move the plate up and down.