Seiko Epson Corporation

Manabu Watanabe

Akihiko Tsunoya

Toshimitsu Hirai

Kaoru Momose

Koji Fujimori

Eiji Okamoto

Kazuhide Nakamura

A three-dimensional modeling device includes a first ejection section configured to eject a first material, a second ejection section configured to eject a second material, a drive section configured to move each of the first ejection section and the second ejection section relatively to a stage, and a control section. The control section executes a calibration process including a first process of ejecting the first material from the first ejection section to thereby shape a first portion and a second portion shaped like straight lines arranged in parallel to each other in the calibrating shaped article, a second process of ejecting the second material from the second ejection section to thereby shape a third portion shaped like a straight line arranged between the first portion and the second portion in the calibrating shaped article, and a third process of adjusting a relative position of the second ejection section to the first ejection section in accordance with a correction value obtained based on relative positions of the third portion to the first portion and the second portion, and the control section executes the first process and the second process once again when the third process is executed in the calibration process.

Three-dimensional modeling device, method of calibrating three-dimensional modeling device, and method of manufacturing three-dimensional shaped article

A three-dimensional shaping apparatus includes an ejecting section configured to eject a shaping material from a nozzle, a stage on which the shaping material is stacked, a driving section configured to change relative positions of the ejecting section and the stage, a cleaning mechanism including a brush and a blade, and a control section. The control section causes, in cleaning processing, the nozzle to reciprocate to traverse the cleaning mechanism a plurality of times to execute a cleaning operation for bringing at least one of the brush and the blade and the nozzle to come into contact. The control section causes, in the cleaning operation, the nozzle to reciprocate to come into contact with the brush or the blade in different positions of the brush or the blade. Temperature of the nozzle in the cleaning operation is lower than temperature of the nozzle at a stacking time of layers.

Three-dimensional shaping apparatus and manufacturing method for three-dimensional shaped object

A three-dimensional shaped article production apparatus includes a shaping table, a layer forming section that forms a powder layer, a head that ejects a liquid containing a binder to a shaping region of a three-dimensional shaped article, a liquid supply system that supplies the liquid to the head, and a moving system that relatively moves the head with respect to the shaping table, wherein the head includes a nozzle that ejects the liquid, a pressure chamber that communicates with the nozzle, a supply flow channel that communicates with the pressure chamber upstream in a supply direction of the liquid, and a circulation flow channel that communicates with the pressure chamber downstream in the supply direction, the circulation flow channel includes a first filter, and a pore diameter of the first filter is larger than a particle diameter of a powder for forming the powder layer.

Three-dimensional shaped article production apparatus

A plasticizing apparatus for plasticizing a material to form a molten material includes a screw having a groove formed face, in which a groove portion in a spiral shape to be supplied with the material is formed, and a first heating portion heating the material, and a barrel having a screw opposed face, which is a face opposed to the groove formed face, and in which a sending-out hole for sending out the molten material is formed at a center, and a second heating portion heating the material.

Plasticizing apparatus, plasticizing method, and three-dimensional shaping apparatus

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).&#x2264;20&#xd7;+0.20[mm]&#x2003;&#x2003;(1)

Three-dimensional shaping apparatus

A plasticizing apparatus for plasticizing a material to form a molten material includes a screw in a columnar shape having a groove formed face, in which a material flow channel including a groove portion to be supplied with the material is formed, and a barrel having a screw opposed face, which is a face opposed to the groove formed face, and in which a sending-out hole for sending out the molten material is formed at a center, and a heating portion heating the material. The material flow channel has a recess provided at a center of the groove formed face, and the groove portion extending in a spiral shape toward an outer circumference of the groove formed face from the recess, and a heat insulating portion having a lower thermal conductivity than an outer circumferential portion in the screw is provided in at least a part of an inner circumferential portion including the recess in the screw.

A three-dimensional molding device includes a discharge unit that discharges a molding material towards a stage, a heating unit that heats the discharge unit, a temperature acquisition unit that acquires a temperature of the molding material placed on the stage, and a control unit. The control unit controls the heating unit such that a relationship of a temperature Tb of an existing layer, a path cross-sectional area Sb of the existing layer, a specific gravity &#x3c1;b of a first thermoplastic resin contained in the existing layer, a specific heat Cb of the first thermoplastic resin, a temperature Tu of the heating unit, a path cross-sectional area Su of a subsequent layer, a specific gravity &#x3c1;u of a second thermoplastic resin contained in the subsequent layer, a specific heat Cu of the second thermoplastic resin, a thermal decomposition temperature Td that is a lower temperature between a thermal decomposition temperature of the first thermoplastic resin and a thermal decomposition temperature of the second thermoplastic resin, and a glass transition point Tg that is a higher glass transition point between a glass transition point of the first thermoplastic resin and a glass transition point of the second thermoplastic resin satisfies the following expression (1).&#x3e;()/()&#x2003;&#x2003;(1)

Three-dimensional molding device and method for molding three-dimensional molded object

A method for manufacturing a three-dimensional shaped object includes: a first shaping step of forming a first layer in contact with a stage provided with a recessed portion by changing a relative position between a discharge unit and the stage while discharging a molten material from the discharge unit toward the stage; and a second shaping step of stacking one or more layers on the first layer by changing the relative position between the discharge unit and the stage while discharging the molten material from the discharge unit toward the first layer. The stage has a first region including a region on the recessed portion and a second region different from the first region, and in the first shaping step, the first layer is formed by making a first supply amount which is a supply amount of the molten material supplied from the discharge unit to the first region per unit area larger than a second supply amount which is a supply amount of the molten material supplied from the discharge unit to the second region per unit area.

Method for manufacturing three-dimensional shaped object and three-dimensional shaping device

A quality determination method for a three-dimensional shaped object includes: a shaping step of shaping a plurality of three-dimensional shaped objects by discharging a liquid from a nozzle hole toward a stage while changing a relative position between a discharge unit having a plurality of the nozzle holes arranged along a first direction and the stage in a second direction intersecting the first direction; a discharge inspection step of inspecting a discharge state of the liquid from the nozzle hole after or during the shaping step; and a quality determination step of determining that, when an abnormality is detected in the discharge state from at least one nozzle hole of the plurality of nozzle holes in the discharge inspection step, a low-quality three-dimensional shaped object is included in the plurality of shaped three-dimensional shaped objects.

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Shiojiri, Japan

Manabu Watanabe