公开(公告)号：US20220016700A1

公开(公告)日：2022-01-20

申请号：US17436790

申请日：2020-03-13

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Richard Remo Fontana ,  Robert Edward Weiss

IPC: B22F3/00 ,  B22F3/10 ,  F27B9/14 ,  F27B17/00

Abstract: A sintering and debinding system includes a debinding chamber configured to switch between an open state and a closed state, the open state being configured to permit receipt or removal of at least one part within or from the debinding chamber and a sintering chamber operably connected to the debinding chamber and being vertically positioned above or below the debinding chamber. The sintering system also includes a shelf structure configured to receive the at least one part, the shelf structure being movable between the debinding chamber and the sintering chamber and a gate valve configured to switch between an open state and a closed state, the gate valve being configured to selectively permit or block fluid communication between the debinding chamber and the sintering chamber. The gate valve is configured such that: when the gate valve is in an open state, fluid communication between the debinding chamber and the sintering chamber is permitted and the shelf structure is movable between the debinding chamber and the sintering chamber. The gate valve is further configured such that, when the gate valve is in the closed state, fluid communication between the debinding chamber and sintering chamber is restricted, and at least one of: (i) movement of the shelf structure between the debinding chamber and the sintering chamber is restricted or (ii) the debinding chamber is configured to permit receipt within and removal of the at least one part from the debinding chamber.

公开(公告)号：US20220065533A1

公开(公告)日：2022-03-03

申请号：US17460028

申请日：2021-08-27

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Shashank Holenarasipura Raghu ,  Michael Andrew Gibson

IPC: F27B5/04 ,  F27B5/16 ,  F27D17/00 ,  F27D7/06

Abstract: The present disclosure includes a furnace for heating and/or sintering one or more three-dimensional printed metal parts. The furnace includes a furnace chamber, insulation within the furnace chamber, a retort within the furnace chamber, and one or more getters containing getter material. The retort is configured to receive the one or more three-dimensional printed metal parts.

公开(公告)号：US11766718B2

公开(公告)日：2023-09-26

申请号：US17018334

申请日：2020-09-11

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard

IPC: B22F3/00 ,  B22F3/10 ,  F27B5/04 ,  F27B5/14 ,  B22F3/22 ,  F27D7/02 ,  F27B5/06 ,  F27D1/18

CPC classification number: B22F3/003 ,  B22F3/1021 ,  F27B5/04 ,  F27B5/14 ,  B22F3/225 ,  F27B2005/064 ,  F27D2001/1891 ,  F27D2007/023

Abstract: A compound sintering furnace with managed contamination for debinding and sintering parts. An inner insulation layer is disposed within an outer insulation layer and has an internal hot face surrounding a work zone. A sealed housing surrounds the inner insulation layer and is composed of a refractory material capable of withstanding a service temperature greater than a debinding temperature and less than a sintering temperature. An outer heater system is configured to heat at least a portion of the sealed housing and externally heat the inner insulation layer to, in conjunction with an inner heater system, heat the work zone to the debinding temperature, and inhibit condensation of a binder within and upon the inner insulation layer during a debinding process. The inner heater system is configured to internally heat the inner insulation and heat the work zone to the sintering temperature.

公开(公告)号：US20180306512A1

公开(公告)日：2018-10-25

申请号：US15961643

申请日：2018-04-24

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Emanuel M. Sachs

IPC: F27D1/00 ,  B32B5/08 ,  B32B33/00 ,  F27D11/12 ,  H05B6/64

CPC classification number: F27D1/0006 ,  B22F3/003 ,  B22F2998/10 ,  B22F2999/00 ,  B32B5/08 ,  B32B33/00 ,  B32B2262/105 ,  B32B2262/106 ,  B32B2305/22 ,  B32B2307/304 ,  B32B2307/412 ,  B32B2307/416 ,  B32B2311/24 ,  B32B2313/04 ,  F27B5/10 ,  F27B5/14 ,  F27D11/12 ,  F27D99/0001 ,  F27D2099/0028 ,  H05B6/6402 ,  H05B6/647 ,  H05B6/6491 ,  B22F3/008 ,  B22F3/1021 ,  B22F2202/05 ,  B22F2202/06 ,  B22F2201/20

Abstract: A furnace system includes a heating chamber, a retort assembly, and a waveguide. The heating chamber includes a shell encompassing an insulation layer and a working volume, where the working volume is configured to receive at least one part for heat treatment. The retort assembly is supported within the insulation layer and includes an inner retort surface facing the working volume. The inner retort surface is formed of at least one carbon compound reflective of microwave radiation, and the retort assembly defines a retort aperture. The waveguide is configured to direct microwave radiation from a microwave source to the retort aperture.

公开(公告)号：US20230381859A1

公开(公告)日：2023-11-30

申请号：US18233217

申请日：2023-08-11

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard

IPC: B22F3/00 ,  B22F3/10 ,  F27B5/04 ,  F27B5/14

CPC classification number: B22F3/003 ,  B22F3/1021 ,  F27B5/04 ,  F27B5/14 ,  B22F3/225

Abstract: A compound sintering furnace with managed contamination for debinding and sintering parts. An inner insulation layer is disposed within an outer insulation layer and has an internal hot face surrounding a work zone. A sealed housing surrounds the inner insulation layer and is composed of a refractory material capable of withstanding a service temperature greater than a debinding temperature and less than a sintering temperature. An outer heater system is configured to heat at least a portion of the sealed housing and externally heat the inner insulation layer to, in conjunction with an inner heater system, heat the work zone to the debinding temperature, and inhibit condensation of a binder within and upon the inner insulation layer during a debinding process. The inner heater system is configured to internally heat the inner insulation and heat the work zone to the sintering temperature.

公开(公告)号：US20230114036A1

公开(公告)日：2023-04-13

申请号：US17802722

申请日：2021-03-01

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard

IPC: F27B5/04 ,  B22F3/00 ,  F27B5/16

Abstract: Disclosed is a pumping system with reduced contamination. A vacuum pump system includes a mechanical vacuum pump mechanism within a hermetic pump that hermetically isolates the pump mechanism from ambient air. A pump inlet is hermetically sealed to the hermetic pump housing. A pump outlet is hermetically sealed at one end to the hermetic pump housing and at the other end to an inlet of a Peclet seal tube. The vacuum pump system produces a vacuum in a vacuum processing chamber. A sweep gas source injects a sweep gas into at least one of (i) the hermetic pump housing and (ii) the inlet of the Peclet seal tube. The sweep gas and a process gas flow through the Peclet seal tube to substantially isolate against the backflow of the ambient air through the Peclet seal tube.

公开(公告)号：US20210078075A1

公开(公告)日：2021-03-18

申请号：US17018334

申请日：2020-09-11

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard

IPC: B22F3/00 ,  B22F3/10

Abstract: A compound sintering furnace with managed contamination for debinding and sintering parts. An inner insulation layer is disposed within an outer insulation layer and has an internal hot face surrounding a work zone. A sealed housing surrounds the inner insulation layer and is composed of a refractory material capable of withstanding a service temperature greater than a debinding temperature and less than a sintering temperature. An outer heater system is configured to heat at least a portion of the sealed housing and externally heat the inner insulation layer to, in conjunction with an inner heater system, heat the work zone to the debinding temperature, and inhibit condensation of a binder within and upon the inner insulation layer during a debinding process. The inner heater system is configured to internally heat the inner insulation and heat the work zone to the sintering temperature.

公开(公告)号：US20220008991A1

公开(公告)日：2022-01-13

申请号：US17429763

申请日：2020-02-11

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Jonah Samuel Myerberg ,  Emanuel M Sachs ,  Richard Remo Fontana ,  Robert Edward Weiss ,  Yet-Ming Chiang ,  Stephen Dipietro ,  Nicholas Graham Bandiera

IPC: B22F3/00 ,  B22F3/10 ,  B33Y40/20 ,  F27B5/04 ,  F27B5/08 ,  F27D1/00 ,  F27D99/00 ,  F27B5/18

Abstract: A furnace may include an outer wall defining a chamber, the chamber including an internal cavity configured to receive one or more parts, at least one heater positioned within the chamber, the at least one heater being configured to generate temperatures of at least about 800 degrees Celsius within the internal cavity, and a vacuum pump configured to apply a vacuum to at least a portion of the chamber. The furnace may also include at least one layer of inner insulation and at least one layer of outer insulation disposed outward of the inner insulation with respect to the chamber, the at least one layer of outer insulation being sealed with respect to the at least one layer of inner insulation.

公开(公告)号：US10578361B2

公开(公告)日：2020-03-03

申请号：US15961643

申请日：2018-04-24

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Emanuel M. Sachs

IPC: F27D11/12 ,  F27D1/00 ,  B32B5/08 ,  B32B33/00 ,  H05B6/64 ,  F27B5/14 ,  F27B5/10 ,  B22F3/00 ,  F27D99/00

Abstract: A furnace system includes a heating chamber, a retort assembly, and a waveguide. The heating chamber includes a shell encompassing an insulation layer and a working volume, where the working volume is configured to receive at least one part for heat treatment. The retort assembly is supported within the insulation layer and includes an inner retort surface facing the working volume. The inner retort surface is formed of at least one carbon compound reflective of microwave radiation, and the retort assembly defines a retort aperture. The waveguide is configured to direct microwave radiation from a microwave source to the retort aperture.

公开(公告)号：US20200016654A1

公开(公告)日：2020-01-16

申请号：US16577392

申请日：2019-09-20

Applicant: Desktop Metal, Inc.

Inventor： Nathan Woodard ,  Christina Clowes ,  Matthew Dwyer ,  Douglas White

IPC: B22F3/00 ,  B33Y40/00 ,  F27D11/02 ,  H05B3/66 ,  H05B7/14 ,  H05B3/64 ,  H05B3/14 ,  H05B3/08

Abstract: A furnace heater includes a first conductive lead, a second conductive lead spaced apart from the first conductive lead by a first distance, and a first helical resistive heater element connected to the first conductive lead. The furnace heater also includes a second helical resistive heater element connected to the second conductive lead and to the first helical resistive heater element, the second helical resistive heater element spaced apart from the first helical resistive heater by a second distance, wherein the first distance is at least twice the second distance.