公开(公告)号：US20240326333A1

公开(公告)日：2024-10-03

申请号：US18616774

申请日：2024-03-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE ,  Akihiko TSUNOYA

IPC: B29C64/245 ,  B29C64/393 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/245 ,  B29C64/393 ,  B33Y30/00 ,  B33Y50/02

Abstract: A three-dimensional shaping device includes a stage having a shaping surface formed with a first, second, third, and fourth groove, a discharge unit configured to supply a shaping material to the shaping surface, a moving mechanism configured to relatively move the stage and the discharge unit, and a control unit configured to control the discharge unit and the moving mechanism. The control unit is configured to execute a control of forming a first shaping line in the first groove, a control of forming a second shaping line in the second groove, a control of forming a third shaping line in the third groove, a control of forming a fourth shaping line in the fourth groove, a control of forming a first floor layer that couples the first and second shaping lines, and a control of forming a second floor layer that couples the third and fourth shaping lines.

公开(公告)号：US20240308133A1

公开(公告)日：2024-09-19

申请号：US18600868

申请日：2024-03-11

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE ,  Akihiko TSUNOYA

IPC: B29C64/165 ,  B29K1/00 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00

CPC classification number: B29C64/165 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00 ,  B29K2001/00

Abstract: A three-dimensional shaping method includes: a shaping step of shaping a three-dimensional shaped object by repeating at least a first step and a second step among three steps including the first step, the second step, and a third step. The first step is supplying a powder containing a plant-derived fiber material to form a powder layer above a shaping surface at which the three-dimensional shaped object is to be shaped. The second step is dispensing a liquid containing a binder to at least a part of the powder layer formed in the first step. The third step is heating the powder layer to which the liquid is dispensed in the second step at a predetermined first temperature. The first temperature is lower than a boiling point of the binder, higher than a melting point of the binder, and is a temperature at which the powder does not discolor.

公开(公告)号：US20240227297A9

公开(公告)日：2024-07-11

申请号：US18492868

申请日：2023-10-24

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE ,  Makoto OMURA

IPC: B29C64/336 ,  B29C64/393

CPC classification number: B29C64/336 ,  B29C64/393 ,  B33Y30/00

Abstract: A three-dimensional shaping device includes a stage, an ejection portion configured to selectively eject, as a shaping material, a first material containing a crystalline resin and a second material containing an amorphous resin to an upper side of the stage, a moving portion configured to relatively move the stage and the ejection portion, and a control unit. The control unit executes first stacking processing when a plurality of slice layers are stacked using the first material as the shaping material and executes second stacking processing when a plurality of slice layers are stacked using the second material as the shaping material. The first stacking processing includes first slice layer forming processing, first ejection stop processing, first temperature detection processing, and second slice layer forming processing, and the second stacking processing includes third slice layer forming processing, second ejection stop processing, first determination processing, and fourth slice layer forming processing.

公开(公告)号：US20240157645A1

公开(公告)日：2024-05-16

申请号：US18507739

申请日：2023-11-13

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE ,  Makoto OMURA

IPC: B29C64/321 ,  B29C64/393 ,  B33Y40/00

CPC classification number: B29C64/321 ,  B29C64/393 ,  B33Y40/00 ,  B33Y30/00

Abstract: A plasticizing device includes: a nozzle configured to extrude a modeling material; a drive motor; a screw configured to be rotated by the drive motor and including a groove formation surface in which a groove is formed; a barrel including a facing surface facing the groove formation surface and provided with a heater and a communication hole; a first heating unit configured to heat the modeling material supplied between the groove formed in the groove formation surface and the barrel; a second heating unit configured to heat the modeling material supplied to the nozzle; and a control unit configured to control the drive motor, the first heating unit, and the second heating unit. When the modeling material contains a crystalline resin, the control unit controls at least one of the first heating unit and the second heating unit to reduce a difference between a first temperature corresponding to a temperature of the barrel and a second temperature corresponding to a temperature of the nozzle.

公开(公告)号：US20200238612A1

公开(公告)日：2020-07-30

申请号：US16773559

申请日：2020-01-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE

IPC: B29C64/209 ,  B33Y30/00 ,  B29C64/393 ,  B33Y50/02

Abstract: 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.

公开(公告)号：US20220402213A1

公开(公告)日：2022-12-22

申请号：US17807120

申请日：2022-06-15

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE

IPC: B29C64/393 ,  B29C64/209 ,  B29C64/245 ,  B29C64/232 ,  B29C64/236 ,  B33Y50/02 ,  B33Y10/00

Abstract: 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.

公开(公告)号：US20210362418A1

公开(公告)日：2021-11-25

申请号：US17324530

申请日：2021-05-19

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE ,  Toshimitsu HIRAI ,  Akihiko TSUNOYA ,  Kaoru MOMOSE

IPC: B29C64/314 ,  B29C64/165 ,  B29C64/209 ,  B29C64/386

Abstract: 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.

公开(公告)号：US20210154940A1

公开(公告)日：2021-05-27

申请号：US17104050

申请日：2020-11-25

Applicant: Seiko Epson Corporation

Inventor： Manabu WATANABE ,  Eiji OKAMOTO ,  Akihiko TSUNOYA ,  Koji FUJIMORI ,  Kazuhide NAKAMURA

IPC: B29C64/393 ,  B29C64/209 ,  B33Y30/00 ,  B33Y50/02

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)

公开(公告)号：US20200338831A1

公开(公告)日：2020-10-29

申请号：US16854318

申请日：2020-04-21

Applicant: SEIKO EPSON CORPORATION

Inventor： Manabu WATANABE

IPC: B29C64/393 ,  B29C64/209 ,  B29C64/165 ,  B29C64/227

Abstract: 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.

公开(公告)号：US20200269491A1

公开(公告)日：2020-08-27

申请号：US16800730

申请日：2020-02-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Koji FUJIMORI ,  Manabu WATANABE

IPC: B29C64/124 ,  B29C64/209 ,  B29C64/232 ,  B29C64/295 ,  B29C64/393

Abstract: 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 ρb 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 ρu 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). Td>(Tu×Su×ρu×Cu+Tb×Sb×ρb×Cb)/(Su×ρu×Cu+Sb×ρb×Cb)>Tg  (1)