3D modeling device and 3D modeling method

1. A 3D modeling device that forms a 3D object, the 3D modeling device comprising:

a stage;

a nozzle through which a fused material is ejected;

a build plate disposed on the stage, the build plate receiving the fused material ejected through the nozzle to build the 3D object on the build plate; and

a plasticizing member configured to plasticize a thermoplastic material to form a plasticized thermoplastic material that is transformed into the fused material, the plasticizing member including:

a flat screw having a grooved surface in which a groove is provided, the groove extending in a helical shape;

a counterface member having a communication path and a screw counterface surface facing the grooved surface; and

a drive motor configured to rotate the flat screw, plasticize the thermoplastic material between the grooved surface and the screw counterface surface, and guide the fused material to the nozzle through the communication path,

wherein the groove continuously helically extends toward a material inlet from which the thermoplastic material in solid form is supplied, and the material inlet faces an end of the groove at a side face of the flat screw.

2. The 3D modeling device according to claim 1 ,

wherein the build plate includes a contraction prevention member, and the contraction prevention member is configured to prevent the fused material from contracting upon being cured, and

the contraction prevention member is a heater that heats the fused material.

3. The 3D modeling device according to claim 1 ,

wherein the build plate includes a contraction prevention member, and the contraction prevention member is configured to prevent the fused material from contracting upon being cured, and

the contraction prevention member is a serrated layer constituting a serrated structure on a surface of the build plate, and the fused material is ejected on the serrated layer by the nozzle.

4. The 3D modeling device according to claim 1 ,

wherein the build plate includes a contraction prevention member, and the contraction prevention member is configured to prevent the fused material from contracting upon being cured, and

the contraction prevention member is a fiber layer formed of a fiber, and the fused material is ejected on the fiber layer by the nozzle.

5. The 3D modeling device according to claim 4 ,

wherein the fiber layer is formed of wood or paper.

6. The 3D modeling device according to claim 4 ,

wherein a coating layer is disposed on the fiber layer, and the coating layer is formed of a material that melts upon being contacted by the fused material.

7. The 3D modeling device according to claim 6 ,

wherein the fiber layer is formed of coated paper having the coating layer on a surface of the fiber layer.

8. The 3D modeling device according to claim 6 ,

wherein the coating layer includes color ink.

9. The 3D modeling device according to claim 1 ,

wherein the build late includes a contraction prevention member, and the contraction prevention member is configured to prevent the fused material from contracting upon being cured, and

the contraction prevention member is removably provided on the build plate.

10. The 3D modeling device according to claim 1 , further comprising:

a processing chamber accommodating the stage, the nozzle, the build plate, and the plasticizing member; and

a temperature controller configured to adjust an atmospheric temperature in the processing chamber.

11. A method of forming a 3D object, the method comprising:

supplying a thermoplastic material in solid form to a plasticizing member from a material inlet, the plasticizing member including:

a flat screw having a grooved surface in which a groove is provided, the groove continuously helically extending in a helical shape;

a counterface member having a communication path and a screw counterface surface facing the grooved surface; and

a drive motor configured to rotate the flat screw, wherein the material inlet faces an end of the groove at a side face of the flat screw;

plasticizing the thermoplastic material between the grooved surface and the screw counterface surface by rotating the flat screw with respect to the counterface member;

transforming the plasticized thermoplastic material into a fused material;

guiding the fused material to a nozzle through the communication path;

ejecting the fused material through the nozzle on a fiber layer disposed on a build plate; and

curing the fused material on the fiber layer so as to form the 3D object on the fiber layer.