Shaping device and shaping method
A shaping device for producing a layered body by repeatedly performing a step of forming a powder layer and a step of fixing powder in at least a partial region of the powder layer includes a first liquid application unit configured to apply a first liquid including a binder for binding the powder, a second liquid application unit configured to apply a second liquid for suppressing a flow of the first liquid, and a control unit that controls the first liquid application unit and the second liquid application unit so that where the powder in a first region of the formed powder layer is to be fixed, the first liquid is applied to the first region and the second liquid is applied to a second region adjacent to the first region. The second liquid is a liquid having higher permeability to the powder layer than the first liquid.
1 . A shaping method comprising shaping a layered body by alternately repeating steps of:
a powder layer forming step of forming a powder layer with powder in a dry state, the powder layer having a first region and a second region adjacent to the first region; and
a powder fixing step of fixing the powder in the first region of the powder layer,
wherein the powder fixing step includes:
a step of applying a first liquid containing a binder for binding the powder to the first region; and
a step of applying a second liquid containing a surfactant to the second region.
2 . The shaping method according to claim 1 , wherein the step of applying the first liquid to the first region is performed after the step of applying the second liquid to the second region.
3 . The shaping method according to claim 1 , wherein the surfactant of the second liquid includes a nonionic surfactant.
4 . The shaping method according to claim 1 , wherein the surfactant of the second liquid includes a fluorosurfactant.
5 . The shaping method according to claim 1 , wherein the first liquid includes a surfactant.
6 . The shaping method according to claim 1 , wherein the second liquid is a liquid having higher permeability to the powder layer than the first liquid.
7 . The shaping method according to claim 1 , wherein the second liquid has a surface tension smaller than that of the first liquid.
8 . The shaping method according to claim 1 , wherein the step of applying the first liquid and the step of applying the second liquid are performed by an inkjet method.
9 . The shaping method according to claim 1 , wherein the second liquid contains a thermally decomposable binder and/or a resin.
10 . The shaping method according to claim 1 , wherein the powder layer is composed of metal powder.
11 . The shaping method according to claim 1 , wherein the binder of the first liquid includes a resin.
12 . The shaping method according to claim 1 , wherein the binder of the first liquid includes a metal particle and/or the first liquid includes metal particles.
13 . The shaping method according to claim 1 , wherein the powder layer has a third region adjacent to the second region.
14 . The shaping method according to claim 13 , wherein the powder in the third region maintains the dry state during the shaping of the layered body.
15 . The shaping method according to claim 13 , wherein the first liquid and the second liquid are not applied to the third region in the powder fixing step.
16 . The shaping method according to claim 15 , wherein the second region is arranged between the first region and the third region.
17 . The shaping method according to claim 13 , further comprising removing the powder in the dry state in the third region from the layered body.
18 . The shaping method according to claim 1 , wherein the powder layer formed in the powder layer forming step does not contain a liquid.
19 . The shaping method according to claim 1 , wherein in the powder layer forming step, the powder layer has capillaries between particles of the powder layer, and
wherein, in the powder fixing step, the second liquid penetrates into the capillaries in the second region.