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    • 8. 发明申请
    • Selectively Activated Mesh Discharge Powder Recoater for Three-Dimensional Printing
    • 选择性活性网格放电粉末回收机三维打印
    • US20170066190A1
    • 2017-03-09
    • US15252375
    • 2016-08-31
    • The ExOne Company
    • Andrew P. KleinLawrence J. VossAnthony S. DuganMichael R.. OrnerThomas Lizzi
    • B29C67/00B29C31/08
    • B33Y10/00B29C64/153B29C64/165B29C64/20B29C64/205B33Y30/00
    • Recoaters are described which are adapted for use in powder-layer three-dimensional printers. The recoaters comprise a mesh discharge device that is adapted to be selectively activated by the application of an agitation, e.g. a vibration. Such mesh discharge devices include a planar mesh, i.e. a screen or sieve, which is adapted to support a quantity of powder when the quantity of powder and the mesh are static and to dispense at least a portion of the quantity of powder when at least one of the quantity of powder and the mesh is agitated. Preferably, the mesh is disposed substantially horizontally, but may be disposed at an angle to the horizontal. Also described are powder-layer three-dimensional printers comprising such recoaters. In some embodiments, the powder-layer three-dimensional printers are adapted to space the mesh no more than about two to ten powder layer thicknesses from the top surface of the powder bed or substrate upon which a powder layer is to be deposited.
    • 描述了适用于粉末层三维打印机的回收器。 重涂器包括筛网排放装置,其适于通过施加搅动而被选择性地活化。 振动。 这种筛网排放装置包括平面网,即筛网或筛子,其适于在粉末和筛网的数量为静态时支撑一定数量的粉末,并且当至少一个 的粉末和网状物的搅拌。 优选地,网格基本上水平设置,但是可以以与水平方向成一定角度设置。 还描述了包括这种重涂器的粉末层三维打印机。 在一些实施例中,粉末层三维打印机适于从要沉积粉末层的粉末床或基底的顶表面将网格间隔不超过约二至十个粉末层厚度。