# US 11,998,980 B2 · Metal 3D printer

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- Number: US 11,998,980 B2
- Document ID: US11998980B2
- Status: Granted
- Kind: B2
- Application number: 17/475,316
- Filed: 2021-09-14
- Published: 2022-06-02
- Granted: 2024-06-04
- Earliest claimed: 2020-11-30
- Assignees: PISTIS Co., Ltd
- Applicants: PISTIS Co., Ltd
- Inventors: Byeong Yeol Choi
- Web page: https://patentgrep.com/patent/US11998980B2

## CPC

- B22F 12/17: to heat the build chamber or platform
- B22F 10/10: Formation of a green body
- B22F 10/18: by mixing binder with metal in filament form, e.g. fused filament fabrication [FFF]
- B22F 12/10: Auxiliary heating means
- B22F 12/226: {for rotary motion}
- B22F 12/37: Rotatable
- B22F 12/53: Nozzles
- B22F 12/55: Two or more means for feeding material
- B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor
- B33Y 40/20: Post-treatment, e.g. curing, coating or polishing
- B33Y 70/10: Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
- Y02P 10/25: Process efficiency
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A metal 3D printer includes a base unit including a fixed part, a first moving part disposed on the fixed part to move in a first direction, a second moving part disposed on the first moving part to move in a second direction, and a third moving part disposed on the second moving part to move in a third direction, a nozzle unit coupled to the second moving part to move in the first and second directions and move in the third direction and injecting a material for manufacturing a sculpture, a processing unit coupled to the third moving part to move in the first to third directions and processing the sculpture, a table unit disposed rotatably to the fixed part and disposed below the nozzle unit, and a heating unit disposed on the fixed part.

## Claims

### Claim 1

A metal 3D printer comprising:
a base unit comprising a fixed part, a first moving part disposed on the fixed part to move in a first direction, a second moving part disposed on the first moving part to move in a second direction, and a third moving part disposed on the second moving part to move in a third direction;
a nozzle unit coupled to the second moving part to move in the first and second directions and move in the third direction and configured to inject a material for manufacturing a sculpture;
a processing unit coupled to the third moving part to move in the first to third directions and configured to process the sculpture;
a table unit disposed rotatably to the fixed part and disposed below the nozzle unit to allow the material injected from the nozzle unit to be seated thereon; and
a heating unit disposed on the fixed part to move in the third direction and disposed below the table unit to heat the table unit,
wherein the processing unit comprises:
a cutting part in which a rotating cutting tool configured to cut the sculpture is detachably provided; and
a liquid injection part coupled to a lower portion of the cutting part to inject liquid toward the sculpture.

### Claim 2 (depends on 1)

The metal 3D printer of claim 1, wherein the nozzle unit comprises:
a first nozzle part configured to inject a metal material;
a second nozzle part configured to inject a support material for supporting the metal material;
a first nozzle driving part coupled to the second moving part to allow the first nozzle part to move in the third direction; and
a second nozzle driving part coupled to the second moving part to allow the second nozzle part to move in the third direction.

### Claim 3

A metal 3D printer comprising:
a base unit comprising a fixed part, a first moving part disposed on the fixed part to move in a first direction, a second moving part disposed on the first moving part to move in a second direction, and a third moving part disposed on the second moving part to move in a third direction;
a nozzle unit coupled to the second moving part to move in the first and second directions and move in the third direction and configured to inject a material for manufacturing a sculpture;
a processing unit coupled to the third moving part to move in the first to third directions and configured to process the sculpture;
a table unit disposed rotatably to the fixed part and disposed below the nozzle unit to allow the material injected from the nozzle unit to be seated thereon; and
a heating unit disposed on the fixed part to move in the third direction and disposed below the table unit to heat the table unit,
wherein the table unit comprises:
a table part on which the material injected from the nozzle unit is seated;
a support part configured to support the table part so that the table part rotates around the second direction;
a first table driving part coupled to the support part and configured to allow the table part to rotate around the second direction; and
a second table driving part coupled to the fixed part and configured to allow the support part to rotate around the first direction.

### Claim 4 (depends on 3)

The metal 3D printer of claim 3, wherein the table part comprises a base member coupled rotatably to the support part and having a hollow that passes through a central portion thereof and a connector member which is coupled with the base member to cover a portion of the hollow and on which the material is seated.

### Claim 5 (depends on 4)

The metal 3D printer of claim 4, wherein the heating unit comprises:
a heating part that is insertable to the hollow and configured to heat the material seated on the connector member through the hollow;
a first heating driving part coupled with the heating part to allow the heating part to move in the third direction; and
a second heating driving part coupled with the first heating driving part to allow the first heating driving part to rotate around the third direction.