Three-dimensional shaping apparatus

Patent metadata

Field	Value
Publication number	US-11577470-B2
Application number	US-202017104050-A
Country	US
Kind code	B2
Filing date	Nov 25, 2020
Priority date	Nov 27, 2019
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

Provided is a three-dimensional shaping apparatus in which surface of a three-dimensional shaped object can be prevented from being roughened. The three-dimensional shaping apparatus that shapes a three-dimensional shaped object by stacking layers of a material includes: a stage; a discharge unit that has a nozzle surface in which a nozzle hole is formed; a moving unit that is configured to change a relative position between the stage and the nozzle surface; and a control unit that is configured to control the moving unit. The control unit drives the moving unit such that a relation between a gap G between the nozzle surface and the stage or the layer of the material when the material is discharged from the discharge unit and an outer diameter Dp of the nozzle surface satisfies a following relation (1).

Dp ≤20× G +0.20[mm]  (1)

First claim

What is claimed is:

1. A three-dimensional shaping apparatus configured to shape a three-dimensional shaped object by stacking a plurality of layers of a material, the three-dimensional shaping apparatus comprising:
a stage;
a discharge unit that has a nozzle surface in which a nozzle hole is formed;
a moving unit configured to change a relative position between the stage and the nozzle surface; and
a control unit configured to control the moving unit, wherein
the control unit is configured to drive the moving unit such that a relation between a gap G between the nozzle surface and the stage or a top layer of the plurality of layers of the material when the material is discharged from the discharge unit and an outer diameter Dp of the nozzle surface satisfies a following relation,
Dp≤ 20× G+ 0.20mm,

the nozzle surface is non-parallel to a top surface of the top layer of the plurality of layers of the material on the stage,
an inner diameter Dh of the nozzle hole is 0.20 mm,
a line width of each layer of the plurality of layers is 0.30 mm,
a relation between the inner diameter Dh of the nozzle hole and the gap G satisfies a following relation, 0<G≤Dh,
the gap G satisfies a following relation, 0.05 mm≤G≤0.20 mm, and
the outer diameter Dp of the nozzle surface satisfies a following relation, 0.50 mm≤Dp≤2.20 mm.

Assignees

• Seiko Epson Corp

Inventors

• Watanabe Manabu
• Okamoto Eiji
• Tsunoya Akihiko
• Fujimori Koji
• Nakamura Kazuhide

Classifications

• Y02P10/25

  Process efficiency · CPC title

• B29C64/20

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B29C64/118 Primary

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B29C64/209

  Heads; Nozzles · CPC title

• B29C64/393 Primary

  for controlling or regulating additive manufacturing processes · CPC title