POWDER REFILL SYSTEM FOR 3-DIMENSIONAL PRINTING

    公开(公告)号:WO2021151039A1

    公开(公告)日:2021-07-29

    申请号:PCT/US2021/014812

    申请日:2021-01-23

    Abstract: A powder refill system for a CBAM process uses a sensor to sense the amount of powder in a tray and a compressed air powder application system to force powder into the system. Powder enters the system from a powder bottle mounted upside-down on a plate with an orifice and mixing chamber and a stainless-steel "aeration stone". This is a fitting with porous walls, where porosity is finer than most of particulate matter of the powder being used. Air can enter through the fitting, broken down into microscopic streams, but powder cannot enter back into the air supplying line. The powder aerosol is then used in the printing/flooding process. A mounting plate allows easy replacement of the powder bottle.

    METHOD AND APPARATUS FOR POWDER SYSTEM RECYCLER FOR PRINTING PROCESS

    公开(公告)号:WO2018170268A1

    公开(公告)日:2018-09-20

    申请号:PCT/US2018/022640

    申请日:2018-03-15

    Abstract: A method and powder system component of an apparatus for use in a printing process is disclosed, and for removing and recycling excess powder. The powder system results in a cutoff point of 3 microns rather than 50 microns of previous systems. The apparatus comprises a powder applicator, a powder remover, a helical cyclone, a powder collector, and two valves that alternately open and close. The two-valve system prevents air backflow. The powder is processed through the two-valve system. The method comprises: valve 1 is closed and powder accumulates; valve2 is closed also; after valve 1 opens, powder goes through (there is no air backflow), then valve 1 closes; then valve 2 opens and allows powder onto a powder applicator; then valve 2 closes; then the cycle starts again.

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