Tow Stabilization Method and Apparatus
    43.
    发明申请

    公开(公告)号:US20190283277A1

    公开(公告)日:2019-09-19

    申请号:US16194279

    申请日:2018-11-16

    Abstract: A tow stabilization method includes applying liquid to a tow having fibers arranged into a non-stabilized spread-out fiber web, applying powder to the web to adhere the powder where liquid was applied, removing powder from where it did not adhere, and fusing the powder remaining on the web to stabilize the fiber arrangement. The liquid may be volatile. The step of fusing may include heating the fiber web. The liquid and/or powder may be selectively applied. Selective application of powder may be used without application of liquid or powder removal. A tow stabilization apparatus includes a liquid applicator, powder applicator, powder remover, and powder fuser. The liquid applicator may include spray nozzles, applicators based on miniature solenoid valves, inkjet printing heads, and roll applicators. The powder remover may include rollers, air blasters, vibrators, sound wave generators, and vacuums. The powder fuser may include heat applicators and chemical reaction initiators.

    Powder refill system for 3-dimensional printing

    公开(公告)号:US11413821B2

    公开(公告)日:2022-08-16

    申请号:US17156541

    申请日:2021-01-23

    Abstract: A powder refill system for a CBAM process that makes changing a powder container simple and maintains the smallest possible distribution change during the print process. The system automates a constantly low trough powder level during a print and reduces the number of times the powder is recirculated. The system 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.

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