Additive metal manufacturing process

    公开(公告)号:US11203062B2

    公开(公告)日:2021-12-21

    申请号:US16033105

    申请日:2018-07-11

    摘要: Three dimensional “green” parts are formed by combining sheet layers comprising metal powder bound together by a polymer. The “green” parts are then sintered to drive off the polymer and consolidate the metal powder to produce a monolithic metal part. Particularly, the invention is directed to processes for forming and stacking the shaped sheet layers that are readily automated and preserve the high value powder metal and polymer sheet trim scrap for reuse resulting in an additive overall process with little material waste. The invention includes processes in which “green” elements formed by methods such as three dimensional printing are incorporated into the “green” stack and become an integral part of the final sintered part. It further includes processes in which “green” sheet layers are shaped by methods such as hot bending or vacuum forming to provide three dimensional part features.

    METHOD AND DEVICE FOR VIEWING AND/OR ILLUMINATING A TARGET SURFACE IN AN EVACUATED CHAMBER HAVING CONDENSABLE VAPOR THEREIN

    公开(公告)号:US20210394271A1

    公开(公告)日:2021-12-23

    申请号:US17287760

    申请日:2019-04-02

    申请人: ARCAM AB

    摘要: A device for viewing and/or illuminating a target surface in an evacuated chamber having condensable vapor therein, the device comprising: a first section with a through hole having a first end with a first opening and a second end with a second opening; and a second section having a chamber comprising a first portion with a first opening, a second portion with a second opening and a gas inlet, where the second opening is covered with a first window, said first section is attached with the first end to the first portion of the chamber allowing free passage between the chamber and the first section, said gas inlet is connectable to a gas reservoir for feeding a gas into the chamber for prohibiting the first window in the chamber for being contaminated of the condensable vapor.