Device for a layerwise manufacturing of a three-dimensional object

A device for manufacturing a three-dimensional object by a layerwise solidification of a building material at positions in the respective layers that correspond to the object, comprising:

• a machine frame and a building space arranged in the machine frame,
• wherein in the building space there are arranged:
• an application device that applies layers of the building material onto a support device and a previously solidified layer, respectively, by an application element;
• a dosage device that provides building material for the application device for an application, and
• a heating device for heating the applied layers of the building material, wherein one or more of the following features are present:
• a) the application device comprises a holder, wherein the holder comprises a horizontal main arm, a first holder arm and a second holder arm, said first and second holder arm extending substantially vertically in a downward direction from said main arm,
• wherein at least one of said first and second holder arms has flexibility such that said application element can be brought into a form-locking engagement with said first and second holder arm and removed again by hand without the use of a tool;
• b) the dosage device is a conveyor roller rotatably held in a bearing, wherein said bearing is constructed to hold said conveyor roller in a form-locking way at both ends thereof, and a preload element is provided between one end of said conveyor roller and said bearing such as to hold the conveyor roller in the bearing in a locked state so that it can be removed from the bearing by hand without the use of a tool;
• c) the heating device is connected to a support in the building space, wherein said support is a rail, into which said heating device can be inserted and engaged such that the heating device can be removed from the support by hand without the use of a tool.