公开(公告)号：US20230241676A1

公开(公告)日：2023-08-03

申请号：US18160639

申请日：2023-01-27

Applicant: SEIKO EPSON CORPORATION

Inventor： Yasutaka MATSUMOTO ,  Momoko WAKABAYASHI

IPC: B22F1/102 ,  B33Y70/10 ,  B33Y10/00 ,  B22F10/20 ,  B22F10/64 ,  B33Y40/20 ,  B22F10/14

CPC classification number: B22F1/102 ,  B33Y70/10 ,  B33Y10/00 ,  B22F10/20 ,  B22F10/64 ,  B33Y40/20 ,  B22F10/14 ,  B22F9/082

Abstract: A powder for additive manufacturing, which is a powder for additive manufacturing to be used in a binder jet additive manufacturing method, includes a metal powder, and a coating film that is provided at surfaces of particles of the metal powder and that contains a compound derived from a coupling agent having a reactive functional group, wherein when an average particle diameter is represented by R [μm], and (R/10)2/(R/10)3 is represented by A, the coating film has a carbon concentration of 0.02A mass % or more and 0.30A mass % or less.

公开(公告)号：US20220250145A1

公开(公告)日：2022-08-11

申请号：US17667632

申请日：2022-02-09

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI ,  Yasutaka MATSUMOTO

IPC: B22F1/102 ,  B33Y40/10 ,  B33Y70/00 ,  B22F1/05

Abstract: An additive manufacturing powder includes: a metal powder; and a coating film provided on a particle surface of the metal powder and containing a compound derived from a coupling agent having a functional group. The additive manufacturing powder has an average particle diameter of 3.0 μm or more and 30.0 μm or less. The functional group includes a cyclic structure-containing group, a fluoroalkyl group, or a fluoroaryl group.

公开(公告)号：US20230311409A1

公开(公告)日：2023-10-05

申请号：US18191117

申请日：2023-03-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Masaya ISHIDA ,  Momoko WAKABAYASHI ,  Toshiki SANO ,  Hideki ISHIGAMI ,  Kei HIRUMA ,  Seiichi TANIGUCHI ,  Kenji KITADA

IPC: B29C64/165 ,  B29C64/209

CPC classification number: B29C64/165 ,  B29C64/209 ,  B33Y10/00

Abstract: Provided is a method for manufacturing a three-dimensional shaped object, the manufacturing method including: a powder layer formation step of disposing powders containing a forming material of the three-dimensional shaped object in a layer shape and forming a powder layer having a predetermined thickness; and a molded body formation step of discharging, to the powder layer, a binder liquid containing a binder for binding the powders to one another, and forming a molded body in which the powders are bound to one another. In the molded body formation step, in a formation region of the molded body in the powder layer, a discharging amount of the binder liquid per unit area to a first formation region that is a contour portion of the formation region and a discharging amount of the binder liquid per unit area to a second formation region other than the contour portion are discharging amounts different from each other.

公开(公告)号：US20240331900A1

公开(公告)日：2024-10-03

申请号：US18609572

申请日：2024-03-19

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI

IPC: H01F1/20

CPC classification number: H01F1/20

Abstract: An insulator-coated soft magnetic powder includes a soft magnetic powder and an insulating coating film covering the particle surface of the soft magnetic powder and containing a compound having a hydrophobic functional group derived from a coupling agent. The soft magnetic powder has an average particle size of from 2.0 μm to 25.0 μm. The soft magnetic powder has a specific surface area of from 0.05 m2/g to 0.60 m2/g. A ratio A/S is from 3000 to 20000, where S [m2/g] is the specific surface area and A [ppm] is the oxygen content of the soft magnetic powder.

公开(公告)号：US20210156025A1

公开(公告)日：2021-05-27

申请号：US17104475

申请日：2020-11-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI

IPC: C23C16/44 ,  H01F1/153 ,  H01F41/00 ,  C23C16/455 ,  C23C16/40

Abstract: A particle coating method includes a heating step of heating soft magnetic metal particles containing an amorphous phase within a temperature range of 100° C. or higher and 500° C. or lower for 0.1 hours or more and 300 hours or less, and an insulating film formation step of forming an insulating film at surfaces of the soft magnetic metal particles by a chemical vapor deposition method. The soft magnetic metal particles preferably contain the amorphous phase at 50 vol % or more.

公开(公告)号：US20250100047A1

公开(公告)日：2025-03-27

申请号：US18890954

申请日：2024-09-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI ,  Yasutaka MATSUMOTO

IPC: B22F1/16 ,  B22F10/14 ,  B33Y70/00

Abstract: An additive manufacturing powder used for producing an additively manufactured body by a binder-jet method includes a metal particle and a coating film provided at a surface of the metal particle and containing a compound derived from a coupling agent containing an amino group or an epoxy group. When 40 μL of water is dropped onto a powder layer formed by compressing to have a relative density of 51%, a time for the water to infiltrate is 10.00 seconds or shorter.

公开(公告)号：US20240331901A1

公开(公告)日：2024-10-03

申请号：US18617094

申请日：2024-03-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI

IPC: H01F1/20 ,  H01F27/255

CPC classification number: H01F1/20 ,  H01F27/255

Abstract: An insulator-coated soft magnetic powder includes a soft magnetic powder, an inorganic insulating film including a ceramic and covering the particle surface of the soft magnetic powder, and an organic film including a compound derived from a coupling agent having a hydrophobic functional group and covering the surface of the inorganic insulating film, wherein the inorganic insulating film has an average thickness of from 5 nm to 100 nm, and the insulator-coated soft magnetic powder has a water content of from 30 ppm to 400 ppm, as measured by the Karl Fischer method at 250° C. after the insulator-coated soft magnetic powder is left in an environment of atmospheric pressure, a temperature of 30° C., and a relative humidity of 80% for 24 hours.

公开(公告)号：US20240123498A1

公开(公告)日：2024-04-18

申请号：US18476696

申请日：2023-09-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI ,  Yasutaka MATSUMOTO

IPC: B22F1/102 ,  B22F1/05 ,  B22F1/142 ,  B22F10/14

CPC classification number: B22F1/102 ,  B22F1/05 ,  B22F1/142 ,  B22F10/14 ,  B33Y70/00

Abstract: An additive manufacturing powder includes: a metal powder; and a film provided on a particle surface of the metal powder and containing a compound derived from a coupling agent having a hydrophobic functional group. An average particle diameter is 3.0 μm or more and 30.0 μm or less, and a water amount is measured by a Karl Fischer method before and after the additive manufacturing powder is subjected to a heat treatment at 200° C. for 24 hours in an air atmosphere, and when the water amount before the heat treatment is set to 1, the water amount after the heat treatment is 0.85 or more and 1.15 or less in terms of mass ratio.

公开(公告)号：US20230302533A1

公开(公告)日：2023-09-28

申请号：US18188189

申请日：2023-03-22

Applicant: SEIKO EPSON CORPORATION

Inventor： Momoko WAKABAYASHI ,  Yasutaka MATSUMOTO

IPC: B22F1/102 ,  B22F1/05 ,  B33Y70/10

CPC classification number: B22F1/102 ,  B22F1/05 ,  B33Y70/10 ,  B22F2304/10

Abstract: An additive manufacturing powder includes: a metal powder; and a film provided on a particle surface of the metal powder and containing a compound derived from a coupling agent having a hydrophobic functional group. An average particle diameter is 3.0 μm or more and 30.0 μm or less, and a contact angle of water measured at 25° C. by a θ/2 method, in a state where the additive manufacturing powder is subjected to a heating treatment at 200° C. for 24 hours in an air atmosphere and then laid in layers, is 80° or more and 150° or less.