The invention relates to a negative pressure-based device and a negative pressure-based method for manufacturing porous textures by
laser sintering and quick molding. The device comprises an X-Y
workbench, wherein a pair of guide rails is arranged on the
workbench, and the guide rails have a
powder spreading roller and a power spreading groove which can move reciprocally along the guide rails; the X-Y
workbench is provided with a molding tank, and a molding workbench capable of moving vertically is arranged in the molding tank; the molding workbench consists of a screen with holes distributed densely and a
carriage, and a negative pressure chamber is formed on the lower surface of the molding workbench; the bottom end of the negative pressure chamber is connected with a screw and a
servo motor in turn; an absorption tube is communicated with the negative pressure chamber through an opening; and the other end of the absorption tube is connected with a filter and a
vacuum pump in turn. In the invention, based on a negative pressure absorption principle,
powder which is not sintered on each layer is removed and recycled through an absorption tube; and through layer-by-layer absorption, the
powder which is not sintered and solidified is cleaned completely, while the sintered and solidified powder is continuously stacked and overlaid to form parts, so that the manufacturing of the porous texture with an aperture of less than 1mm is realized through
selective laser sintering and quick molding.