DEVICE AND METHOD FOR MAKING A THREE-DIMENSIONAL OBJECT

摘要

A device for the making of a three-dimensional object (3) by means of layer by layer consolidation of a powderlike construction material (11) by electromagnetic radiation or particle beam has a height-adjustable carrier (2), on which the object (3) is built, and whose horizontal dimension defines a construction field (5). Furthermore, an irradiation device (6, 9) is present for directing the radiation onto regions of an applied layer of the construction material within the construction field (5) corresponding to an object cross section (30). A control unit (10) controls the irradiation device (6, 9) such that the powder particles of the construction material (11) are bonded together at the sites where the radiation impinges on the construction material. A selective heating device (18a, 18b) is designed so that any given partial surface (19) of the construction field (5) can be heated before and/or after to a plateau temperature, which is significantly higher than the temperature of at least a portion of the construction field (5) outside the partial surface (19). The control unit (10) actuates the selective heating device (18a, 18b) such that the partial surface (19) has a predefined minimum distance (d) from the edge of the construction field (5).

主权项

1. Device for the making of a three-dimensional object by means of layer by layer consolidation of a powderlike construction material by electromagnetic radiation or particle radiation with:
a height-adjustable carrier, on which the object is built, and whose horizontal dimension defines a construction field, an irradiation device for directing the electromagnetic radiation or particle radiation onto regions of an applied layer of the construction material within the construction field corresponding to an object cross section, a control unit for controlling the irradiation device such that the powder particles of the construction material are bonded together at the sites where the electromagnetic radiation or particle radiation impinges on the construction material, characterized by a selective heating device, which is designed so that any given partial surface of the construction field can be heated to a plateau temperature, which plateau temperature is significantly higher than the temperature of at least a portion of the construction field outside the partial surface, wherein the control unit is designed so that it actuates the selective heating device such that the partial surface has a predefined minimum distance from the edge of the construction field.