发明名称 |
FOERFARANDE OCH APPARAT FOER FRAMSTAELLNING AV EN DETALJ. |
摘要 |
A method and apparatus (10) for selectively sintering a layer of powder to produce a part comprising a plurality of sintered layers. The apparatus includes a computer (40) controlling a laser (12) to direct the laser energy onto the powder to produce a sintered mass. The computer either determines or is programmed with the boundaries of the desired cross-sectional regions of the part. For each cross-section, the aim of the laser beam is scanned over a layer of powder and the beam is switched on to sinter only the powder within the boundaries of the cross-section. Powder is applied and successive layers sintered until a completed part is formed. The powder may consist of a plastic, metal, ceramic, or polymer substance. In the preferred embodiment, the aim of the laser is directed in a continuous raster scan and the laser turned on when the beam is aimed within the boundaries of the particular cross-section being formed. Preferably, the powder dispensing mechanism includes a drum which is moved horizontally across the target area and counter-rotated to smooth and distribute the powder in an even layer across the target area. A downdraft system provides controlled temperature air flow through the target area to moderate powder temperature during sintering. <IMAGE> |
申请公布号 |
FI84329(C) |
申请公布日期 |
1991.11.25 |
申请号 |
FI19880002881 |
申请日期 |
1988.06.16 |
申请人 |
BOARD OF REGENTS,,THE UNIVERSITY OF |
发明人 |
DECKARD,CARL R. |
分类号 |
B22F3/02;B05C19/00;B22F3/00;B22F3/035;B22F3/10;B22F3/105;B22F7/02;B22F7/04;B23K26/00;B23K26/04;B23K26/06;B23K26/08;B23K26/34;B28B1/00;B28B11/06;B29C35/04;B29C35/08;B29C41/12;B29C41/46;B29C67/00;B29C67/04;C04B33/32;C04B35/64;C23C24/08;C23C24/10;C23C26/02;G05B19/4099;G05B19/41;(IPC1-7):B22F7/00 |
主分类号 |
B22F3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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