Vorrichtung zum Laser-Strahlungsenergiesintern

A radiant heater (30), and an apparatus for performing selective laser sintering using the same, are disclosed. The radiant heater (30) is ring-shaped with its dimensions and distance from the target surface preferably defined to provide radiant energy to a target surface (4), with the ate of energy...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BEAMAN, JOSEPH J., AUSTIN TX 78705, US, GRUBE, KRIS W., AUSTIN TX 78754, US
Format:	Patent
Sprache:	ger
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ARTIFICIAL STONE CASTING CEMENTS CERAMICS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIME, MAGNESIA MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS POWDER METALLURGY REFRACTORIES REGULATING SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF NATURAL STONE WORKING METALLIC POWDER WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A radiant heater (30), and an apparatus for performing selective laser sintering using the same, are disclosed. The radiant heater (30) is ring-shaped with its dimensions and distance from the target surface preferably defined to provide radiant energy to a target surface (4), with the ate of energy received per unit area of the target surface (4) being substantially uniform. A frusto-conical ring-shaped radiant heater (40) is also disclosed, which may be disposed closer to the surface (4) to provide improved efficiency of heat transfer in a uniform fashion. A cooling element similarly shaped is also disclosed, which operates in the same manner to uniformly transfer radiant heat from the target surface (4). Zoning of the ring-shaped radiant heaters (30), to allow for non-uniform radiant energy emission to the target surface, is also disclosed. Monitoring of the temperature of the target surface (4) is done by way of infrared sensors (34). For monitoring of cool temperatures, a second infrared sensor (36) is directed to the radiant heater, so that compensation for reflection of the radiant heat from the surface (4) may be accomplished.