POWDER BED FUSION DEVICE

• Main Author: HAGIWARA TADASHI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2016
• Subjects: 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 OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING METALLIC POWDER; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a powder bed fusion device which can prevent reflection of laser beam by vapor deposition of sublimated or evaporated metal, and can provide enough energy of the laser beam to powder materials.SOLUTION: A powder bed fusion device comprises: a laser beam radiating unit 201 radiating laser beam; a chamber 11 which is provided a transmission window 12 of the laser beam and can decrease pressure; a lamellation unit 202 provided in the chamber 11 and forming lamination of powder materials irradiated the laser beam; and film holding means 15, 16 and 17 holding a film 18 transmitting the laser beam and shifting the film so as to face the transmission window 12 between the transmission window 12 and the lamellation unit 202.SELECTED DRAWING: Figure 1 【課題】昇華し、或いは蒸発した金属の蒸着によるレーザ光の反射を抑制し、粉末材料に十分なレーザ光のエネルギーを供給することができる粉末床溶融結合装置を提供するものである。【解決手段】レーザ光を出射するレーザ光出射部201と、レーザ光の透過窓12が設けられた減圧可能なチャンバ11と、チャンバ11内に設けられ、レーザ光を照射する粉末材料の薄層が形成される薄層形成部202と、レーザ光を透過するフィルム18を保持し、透過窓12と薄層形成部202の間で透過窓12と対面するように移動させるフィルム保持手段15, 16, 17とを有する。【選択図】図１