Method and device for metering building material in a generative production method

• Main Authors: JELIN ROBERT, PHILIPPI JOCHEN, DANZIG ANDRE, BAUMANN ANDREAS, CANTZLER GERD, SALZBERGER RAINER
• Format: Patent
• Language: Chinese; English
• Published: 23.03.2018
• 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

The invention relates to a method for producing an object (3) on a construction site (22) by successive layer-wise solidification of a powdery construction material (18). Said method comprises the following steps: a) applying a layer of the powdery construction material (18) at a predetermined thickness d2 to a previously applied layer of the construction material, solidified in an area corresponding to a cross-section of the object, a coating device (5, 15) being moved in a direction (B) over the previously applied layer for applying the construction material (18), and b) selectively solidifying the construction material (18), applied in step a), in an area which corresponds to the cross-section of the object (3). Prior to applying a layer to the solidified area having the thickness d1 inthe previously applied layer, the maximum (MAX) expansion of the product of said solidified area in the direction of movement (B) of the coating device (5) and of the layer thickness d1 is determinedand when applying the lay