THREE DIMENSIONAL PRINTER

摘要

A powder sintering lamination molding method which can improve the quality of the molded product without extending the time required for the lamination molding. A powder sintering lamination molding method, including the steps of, irradiating an irradiation region of the sliced layer of a molded product surrounded by an outline profile with a laser to selectively sinter the material powder of the material powder layer within the irradiation region; wherein a cooling period is provided after the laser is irradiated along the first line and before the laser is irradiated along the second line.

主权项

1. A powder sintering lamination molding method, comprising the steps of:
forming a material powder layer corresponding to a sliced layer obtained by slicing a model of a molded product having a desired three-dimensional profile, the model being sliced by a horizontal plane at a unit height; and irradiating an irradiation region of the sliced layer of the molded product surrounded by an outline profile with a laser to selectively sinter the material powder of the material powder layer within the irradiation region; wherein the steps of the forming of the material powder layer and the irradiating of the irradiation region are repeated to produce the molded product; the laser is scanned along a scanning passage comprising a plurality of lines, thereby irradiating the material powder layer, the scanning passage provided to allow irradiation of the laser throughout the entire irradiation region; the plurality of lines are classified into a plurality of line groups; each line group of the plurality of line groups contains a plurality of lines arranged adjacent with each other and a plurality of lines arranged along a direction of the scanning passage; the plurality of lines arranged adjacent with each other contains a first line and a second line; a cooling period is provided after the laser is irradiated along the first line and before the laser is irradiated along the second line; irradiation of the laser is controlled to irradiate the laser along a line belonging to a line group other than a line group in which the first line and the second line belongs, during the cooling period; and the plurality of line groups are selected in order and the laser is irradiated along one line belonging to the selected line group, when the laser is irradiated.