公开(公告)号：US10974299B2

公开(公告)日：2021-04-13

申请号：US16038057

申请日：2018-07-17

Applicant: Desktop Metal, Inc.

Inventor： Uwe Bauer ,  Emanuel Michael Sachs ,  Mark Gardner Gibson ,  Nicholas Graham Bandiera

IPC: B33Y10/00 ,  B21C33/00 ,  B29C64/118 ,  B05B15/50 ,  B05B12/06 ,  B29C64/393 ,  B22F1/00 ,  B22F3/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/321 ,  B29C64/209

Abstract: 3D printing using certain materials, such as metal containing multi-phase materials can be prone to clogs and other flow interruptions. Providing build material according to feed rate profiles having varying rates can mitigate these problems. Each feed rate profile can be broken up into blocks of time, some of which relate to fabricating the exterior geometry of the object. Each block of time can be represented by a FFT. The blocks that relate to the exterior are represented by a FFT that has significant high frequency content of 1 Hz or greater. It is beneficial to use profiles including feed rates outside of a range of feed rates suitable for steady state extrusion, being either higher or lower rates than the range limits. A combination of feed rate profiles based only on clog and flow interruption mitigation and operational to print the part according to a model can be used.

公开(公告)号：US20190022725A1

公开(公告)日：2019-01-24

申请号：US16038057

申请日：2018-07-17

Applicant: Desktop Metal, Inc.

Inventor： Uwe Bauer ,  Emanuel Michael Sachs ,  Mark Gardner Gibson ,  Nicholas Graham Bandiera

IPC: B21C33/00 ,  B22F1/00 ,  B22F3/00

Abstract: 3D printing using certain materials, such as metal containing multi-phase materials can be prone to clogs and other flow interruptions. Providing build material according to feed rate profiles having varying rates can mitigate these problems. Each feed rate profile can be broken up into blocks of time, some of which relate to fabricating the exterior geometry of the object. Each block of time can be represented by a FFT. The blocks that relate to the exterior are represented by a FFT that has significant high frequency content of 1 Hz or greater. It is beneficial to use profiles including feed rates outside of a range of feed rates suitable for steady state extrusion, being either higher or lower rates than the range limits. A combination of feed rate profiles based only on clog and flow interruption mitigation and operational to print the part according to a model can be used.

公开(公告)号：US20250135475A1

公开(公告)日：2025-05-01

申请号：US19009145

申请日：2025-01-03

Applicant: Desktop Metal, Inc.

Inventor： Mark Gardner Gibson ,  Emanuel Michael Sachs

IPC: B05B5/025 ,  B22D23/00 ,  B22F10/22 ,  B22F10/30 ,  B22F10/85 ,  B22F12/53 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: A method of additive manufacturing using magnetohydrodynamic (MHD) printing of liquid metal. A first current pulse is applied to a liquid metal in a nozzle to eject a droplet from a discharge orifice. A second current pulse is applied to the liquid metal in the nozzle to reduce an amplitude of the oscillations in a meniscus on the discharge orifice. The second current pulse can be either of an opposite or the same polarity as the first current pulse and is timed according to according to the oscillation.

公开(公告)号：US20210346958A1

公开(公告)日：2021-11-11

申请号：US17278055

申请日：2019-09-20

Applicant: Desktop Metal, Inc.

Inventor： Mark Gardner Gibson ,  Emanuel Michael Sachs

IPC: B22F10/22 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B22F10/85 ,  B22F12/53 ,  B22D23/00

Abstract: A method of additive manufacturing using magnetohydrodynamic (MHD) printing of liquid metal. A first current pulse is applied to a liquid metal in a nozzle to eject a droplet from a discharge orifice. A second current pulse is applied to the liquid metal in the nozzle to reduce an amplitude of the oscillations in a meniscus on the discharge orifice. The second current pulse can be either of an opposite or the same polarity as the first current pulse and is timed according to according to the oscillation.

公开(公告)号：US20210323054A1

公开(公告)日：2021-10-21

申请号：US17232368

申请日：2021-04-16

Applicant: Desktop Metal, Inc.

Inventor： Mark Gardner Gibson ,  Emanuel Michael Sachs

IPC: B22D23/00 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y30/00

Abstract: A method of developing a frequency map for an MHD jetting nozzle includes filling the MHD jetting nozzle with a liquid metal. The MHD jetting nozzle is excited with a series of jetting pulses delivered at a range of frequencies the vibration response of the MHD jetting nozzle and/or a meniscus of jetting material is measured.

公开(公告)号：US10603718B2

公开(公告)日：2020-03-31

申请号：US15451318

申请日：2017-03-06

Applicant: Desktop Metal, Inc.

Inventor： Emanuel Michael Sachs ,  Mark Gardner Gibson ,  Richard Remo Fontana

IPC: B33Y10/00 ,  B33Y30/00 ,  B22F3/115 ,  B22F3/00 ,  B33Y50/02 ,  B05B5/025

Abstract: Devices, systems, and methods are directed to applying magnetohydrodynamic forces to liquid metal to eject liquid metal from a nozzle along a controlled pattern, such as a controlled three-dimensional pattern as part of additive manufacturing of an object. A feeder system can provide a continuous or substantially continuous supply of a solid metal to the nozzle to facilitate a correspondingly continuous or substantially continuous process for ejecting liquid metal as part of a commercially viable manufacturing process.

公开(公告)号：US20190118258A1

公开(公告)日：2019-04-25

申请号：US16125181

申请日：2018-09-07

Applicant: Desktop Metal, Inc.

Inventor： Emanuel Michael Sachs ,  Uwe Bauer ,  Nicholas Graham Bandiera ,  Mark Gardner Gibson

IPC: B22F3/00 ,  B33Y40/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: 3D printing using metal containing multi phase materials is prone to nozzle clogging and flow artifacts. These can be mitigated by monitoring process conditions and taking action at times based on other conditions. Forces, physical regularity, and temperatures can be monitored and service can be taken based on these, immediately, or at dynamic future points, short or longer term, such as completion of a segment or layer, or before critical geometry. Process conditions can be logged and service time can be based on functions of individual and combinations of logged data. Operating windows can be adjusted based on same. Service includes dwell time at high and low temperatures, treatment material provided into the nozzle to change the liquid composition therein. Plungers and fluid jets can expel material from nozzle inlet or outlet. Dwelling at various temperatures can liquefy clogs or cause rupture by disparate volume changes of cooling materials.

公开(公告)号：US10201854B2

公开(公告)日：2019-02-12

申请号：US15451260

申请日：2017-03-06

Applicant: Desktop Metal, Inc.

Inventor： Emanuel Michael Sachs ,  Mark Gardner Gibson ,  Paul A. Hoisington ,  Richard Remo Fontana

IPC: B33Y50/00 ,  B33Y30/00 ,  B05B5/025 ,  B22F3/115 ,  B22F3/00 ,  B33Y10/00 ,  B33Y50/02

Abstract: Devices, systems, and methods are directed to applying magnetohydrodynamic forces to liquid metal to eject liquid metal along a controlled pattern, such as a controlled three-dimensional pattern as part of additive manufacturing of an object. The magnetohydrodynamic force can be pulsed to eject droplets of the liquid metal to provide control over accuracy of the object being fabricated. The pulsations can be applied in fluid chambers having high resonance frequencies such that droplet ejection can be effectively controlled over a wide range of frequencies, including high frequencies suitable for liquid metal ejection at rates suitable for commercially viable three-dimensional fabrication.