Three-dimensional shaping device and method of shaping three-dimensional shaped article
A three-dimensional shaping device includes a supply flow channel through which a shaping material flows, an ejection amount control mechanism that controls a flow amount of the shaping material to be ejected from a nozzle, a branch flow channel branched from a first partial flow channel as a flow channel between the melting section and the ejection amount control mechanism out of the supply flow channel, a transfer mechanism that transfers the shaping material in the second partial flow channel to the first partial flow channel via the branch flow channel, and a control section that controls the transfer mechanism to transfer the shaping material in the second partial flow channel to the first partial flow channel in a period from stopping the ejection of the shaping material from the nozzle to resuming the ejection.
1. A three-dimensional shaping device comprising:
a melting section configured to melt a material to generate a shaping material;
a supply flow channel which is communicated with the melting section, and through which the shaping material flows;
a nozzle communicated with the supply flow channel and configured to eject the shaping material;
an ejection amount control mechanism provided to the supply flow channel, and configured to control a flow amount of the shaping material to be ejected from the nozzle;
a branch flow channel branched from a first partial flow channel as a flow channel between the melting section and the ejection amount control mechanism out of the supply flow channel, and communicated with a second partial flow channel as a flow channel between the ejection amount control mechanism and the nozzle out of the supply flow channel;
a transfer mechanism configured to transfer the shaping material in the second partial flow channel to the first partial flow channel via the branch flow channel; and
a control section configured to control the ejection amount control mechanism and the transfer mechanism, wherein
the control section is configured to control the transfer mechanism to transfer the shaping material in the second partial flow channel to the first partial flow channel in a period obtained by summing a first period from controlling the ejection amount control mechanism to stop ejection of the shaping material from the nozzle to controlling the ejection amount control mechanism to resume the ejection of the shaping material from the nozzle, and a second period after controlling the ejection amount control mechanism to resume the ejection of the shaping material from the nozzle and before controlling the ejection amount control mechanism to stop ejection of the shaping material from the nozzle a second time.
2. The three-dimensional shaping device according to claim 1 , wherein
the control section is configured to control the transfer mechanism to transfer the shaping material in the second partial flow channel to the first partial flow channel in the first period.
3. The three-dimensional shaping device according to claim 1 , wherein
the control section is configured to control the transfer mechanism to make the shaping material in the second partial flow channel flow out to the branch flow channel in the first period, and
the control section is configured to control the transfer mechanism to make the shaping material in the branch flow channel inflow to the first partial flow channel in the second period.
4. The three-dimensional shaping device according to claim 1 , wherein
the control section is configured to control the transfer mechanism to make the shaping material in the second partial flow channel flow out to the branch flow channel in the first period,
the control section is configured to control the transfer mechanism to make the shaping material in the branch flow channel inflow to the first partial flow channel in the first period when the first period is not shorter than a predetermined period, and
the control section is configured to control the transfer mechanism to make the shaping material in the branch flow channel inflow to the first partial flow channel in the second period when the first period is shorter than the predetermined period.
5. The three-dimensional shaping device according to claim 1 , wherein
the transfer mechanism includes
a cylinder having a cylindrical shape and communicated with the branch flow channel,
a plunger reciprocating in the cylinder, and
a check valve which is disposed in a part between the second partial flow channel and the cylinder out of the branch flow channel, and is configured to prevent outflow of the shaping material from the cylinder to the second partial flow channel.
6. The three-dimensional shaping device according to claim 1 , wherein
the ejection amount control mechanism includes a valve part which is configured to be able to rotate in the supply flow channel, and has a flow passage through which the shaping material flows, and
the ejection amount control mechanism changes a flow amount of the shaping material flowing from the first partial flow channel into the second partial flow channel via the flow passage in accordance with a rotation of the valve part.
7. The three-dimensional shaping device according to claim 1 , further comprising:
a heating section configured to heat the shaping material in the second partial flow channel.