Patent DE-102009020987-A1 (DE)
Title: Device for the production of three-dimensional object by successive hardening of layers of powdery build-up materials solidifiable by laser radiation or electron radiation on a position, comprises a supporting device and a coating device
Inventor: HERZOG FRANK
IPC: B22F3/105
Filed: 2009-05-12
Abstract: The device for the production of three-dimensional object (1) by successive hardening of layers of powdery build-up materials (3) solidifiable by laser radiation (2) or electron radiation on the position corresponding to the respective cross-section of the object, comprises a supporting device (4) for supporting the object on a top side (5) of a carrier (6) turned to the object, a coating device for applying layers of the build-up materials on the supporting device, and irradiation device for irradiating the layers on the position corresponding to the respective cross-section of the object. The device for the production of three-dimensional object (1) by successive hardening of layers of powdery build-up materials (3) solidifiable by laser radiation (2) or electron radiation on the position corresponding to the respective cross-section of the object, comprises a supporting device (4) for supporting the object on a top side (5) of a carrier (6) turned to the object, a coating device for applying layers of the build-up materials on the supporting device, and an irradiation device for irradiating the layers on the position corresponding to the respective cross-section of the object. The carrier is arranged within a construction container. A reducing element equipped with a recess is arranged on an opening and an auxiliary support is detachably mounted on the carrier. The recess of the reducing element with a construction area of the auxiliary carrier defines a construction region for opening the construction container. A side wall of the volume-reducing construction region extends itself vertically to the main stretching plain of the reducing element. The contour of the recess is formed to the center in point-symmetrical and/or mirror-symmetrical manner. The auxiliary support is formed in columnar manner and is equipped with a connection plate for connecting with the carrier. The auxiliary support has a plain area in mounting condition at its end area opposite to the carrier. The plain area of the auxiliary support is directed parallel or plain parallel to the top side of the reducing element. The plain area of the auxiliary support is shifted during shifting the carrier parallel to the top side of the reducing element. The plain area of the auxiliary support comprises a centering clamping system. A wall element forms a part of the side wall of the construction region and is separately formed with the reducing element. The auxiliary support is equipped with a plug- or push-through recess, whose opening is directed to the recess of the reducing element. The plug- or push-through recess is formed according to the type of a blind hole or a passage recess and an area created by the plug- or push-through recess continues itself in the push-through recess of the carrier. A holding insert for the reception of a prefabricated part is inserted at the opening area of the plug- or push-through recess. The reducing element is detachably fixed in the wall area of the construction region. The construction chamber is equipped at its opening region with an insert recess on which a corresponding edge of the reducing element is inserted. A construction material supply chamber near to the construction container is arranged with a height-adjustable carrier of the construction material supply chamber and a reducing element of the construction material supply chamber is arranged on the opening region of the construction material supply chamber with an opening. The reducing element and/or the reducing element of the construction material supply chamber are equipped with recesses or openings and the auxiliary support and/or the auxiliary support device comprises a corresponding number of surfaces forming on the construction region. The number of construction area comprises a construction surface lying in a common plain. The reducing element and the reducing element of the construction material supply chamber and/or the auxiliary support and the auxiliary support device are formed in similar manner. Sealing means are arranged between the side wall of the construction region and the auxiliary support forming the base of the construction region. The sealing means is mounted on the auxiliary support and is arranged on the side wall of the construction region. The surface element forming the construction area is mounted as separate component on the auxiliary support. A reducing insert for reducing the recess is arranged in the recess of the reducing element. The reducing insert comprises a closed opening. The carrier of the construction container and the carrier of the construction material supply chamber are displaceable in such a way that the volume change in the construction region falls below with the volume-change in the construction material supply chamber. The volume-reducing volume of the construction material supply chamber is larger or equal to the volume-reducing volume of the construction container. A position switch is arranged that carries out the supervision of the extreme position of the carrier, the auxiliary support, the auxiliary support device and/or the construction material supply chamber. An independent claim is included for an auxiliary support for detachably mounting on a carrier of a device for the production of three-dimensional object.