Selective laser solidification apparatus and method

Selective laser solidification apparatus (2) is described that comprises a powder bed (6; 200; 300) onto which a powder layer (400; 500) can be deposited and a gas flow unit (30) for passing a flow ofgas over the powder bed along a predefined gas flow direction (G). A laser scanning unit (20) is pro...

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Bibliographische Detailangaben
Hauptverfasser:	RALPH MARKUS MAYER, THOMAS HESS, MARC FRANK DIMTER
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADDITIVE MANUFACTURING TECHNOLOGY ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CASTING MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER PERFORMING OPERATIONS POWDER METALLURGY SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING WORKING CEMENT, CLAY, OR STONE WORKING METALLIC POWDER WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	Selective laser solidification apparatus (2) is described that comprises a powder bed (6; 200; 300) onto which a powder layer (400; 500) can be deposited and a gas flow unit (30) for passing a flow ofgas over the powder bed along a predefined gas flow direction (G). A laser scanning unit (20) is provided for scanning a laser beam (22) over the powder layer (400; 500) to selectively solidify at least part of the powder layer (400;500) to form a required pattern (402; 502). The required pattern (402; 502) is formed from a plurality of stripes or stripe segments (S1-S12) that are formed by advancing the laser beam (22) along the stripe or stripe segment (S1-S12)in a stripe formation direction (L). The stripe formation direction (L) is arranged so that it always at least partially opposes thepredefined gas flow direction(G).A corresponding method is also described. 本发明描述选择性激光固化设备(2)，其包括粉末床(6；200；300)，粉末层(400；500)可以沉积在所述粉末床上；以及气流单元(30)，用于使气流沿着预定义的气流方向(G)在所述粉末床上穿过。提供激光扫描单元(20)，用于在所述粉末层(400；500)上扫描激光束(22)以选择性地固化所述粉末