Three-dimensional shaped article manufacturing apparatus
A three-dimensional shaped article manufacturing apparatus is an apparatus for manufacturing a three-dimensional shaped article by laminating layers formed by discharging and curing inks including a curable resin. The apparatus comprises: a first discharge unit configured to discharge a substantive section-forming ink to a region that forms the three-dimensional shaped article; a second discharge unit configured to discharge a sacrificial layer-forming ink for forming a sacrificial layer to a region that is adjacent to a region that forms an outermost layer of the three-dimensional shaped article and on a surface side of the outermost layer; and a curing unit configured to cure the substantive section-forming ink and the sacrificial layer-forming ink. A viscoelasticity of the sacrificial layer-forming ink during curing of the substantive section-forming ink being not less than a viscoelasticity of the substantive section-forming ink during curing of the substantive section-forming ink.
1. A three-dimensional shaped article manufacturing apparatus for manufacturing a three-dimensional shaped article by laminating layers formed by discharging and curing inks including a curable resin, the apparatus comprising:
a first discharge unit configured to discharge a substantive section-forming ink to a region that forms the three-dimensional shaped article;
a second discharge unit configured to discharge a sacrificial layer-forming ink for forming a sacrificial layer to a region that is adjacent to a region that forms an outermost layer of the three-dimensional shaped article and on a surface side of the outermost layer;
an energy ray irradiation unit configured to irradiate with energy ray to cure the substantive section-forming ink and the sacrificial layer-forming ink; and
a controller configured to control irradiation amount and irradiation timing of the energy ray from the energy ray irradiation unit to cure the substantive section-forming ink and the sacrificial layer-forming ink such that a viscoelasticity of the sacrificial layer-forming ink during curing of the substantive section-forming ink by the energy ray irradiation unit being not less than a viscoelasticity of the substantive section-forming ink during the curing of the substantive section-forming ink by the energy ray irradiation unit.
2. The three-dimensional shaped article manufacturing apparatus as set forth in claim 1 , wherein
the sacrificial layer-forming ink includes 2-(2-vinyloxyethoxy) ethyl (meth)acrylate.
3. The three-dimensional shaped article manufacturing apparatus as set forth in claim 2 , wherein
the sacrificial layer-forming ink includes polyethylene glycol di(meth)acrylate, in addition to 2-(2-vinyloxyethoxy) ethyl (meth)acrylate.
4. The three-dimensional shaped article manufacturing apparatus as set forth in claim 1 , wherein
the substantive section-forming ink includes one or more species selected from the group consisting of 2-(2-vinyloxyethoxy) ethyl (meth) acrylate, polyether-based aliphatic urethane (meth)acrylate oligomer, 2-hydroxy-3-phenoxypropyl(meth)acrylate, and 4-hydroxybutyl(meth)acrylate.
5. The three-dimensional shaped article manufacturing apparatus as set forth in claim 1 , wherein
the substantive section-forming ink and the sacrificial layer-forming ink both include bis(2,4,6-trimethylbenzoyl)-phenyl phosphineoxide and/or 2,4,6-trimethylbenzoyl-diphenyl-phosphineoxide as a polymerization initiator.
6. The three-dimensional shaped article manufacturing apparatus as set forth in claim 1 , wherein
the controller is configured to control the energy ray irradiation unit to cure the substantive section-forming ink and the sacrificial layer-forming ink such that the viscoelasticity of the sacrificial layer-forming ink at a timing when a fluidity of the substantive section-forming ink is lost during the curing of the substantive section-forming ink by the energy ray irradiation unit being not less than a viscoelasticity of the substantive section-forming ink at the timing when the fluidity of the substantive section-forming ink is lost during the curing of the substantive section-forming ink by the energy ray irradiation unit.
7. The three-dimensional shaped article manufacturing apparatus as set forth in claim 1 , wherein
the controller is configured to control the energy ray irradiation unit to simultaneously perform the curing of the substantive section-forming ink and curing of the sacrificial layer-forming ink.