Print head for printing three-dimensional structures made of concrete and a method therefor
A print head for printing three-dimensional structures made of concrete and a method used to deposit layers of concrete material one on top of the other. The print head is configured to be moved in space and to deposit individual layers of a concrete material, which forms the structure to be produced, one on top of the other. The print head includes a feeder configured to provide the concrete material, a conveying device configured to receive the concrete material from the feeder and to convey it, a shaping section configured to be filled with the pressurized concrete material and to define lateral dimensions of the layer to be deposited, an exit section pointing in a direction opposite to a feed direction of the print head, and an exiting prevention section configured to prevent the concrete material from exiting in the feed direction of the print head.
1. A print head for printing three-dimensional structures made of concrete, where said print head is configured to be moved in space and to deposit individual layers of a concrete material one on top of the other which forms the structure to be produced, said print head comprising:
a feeder which is configured to provide said concrete material;
a conveying device which is configured to receive said concrete material from said feeder and convey said concrete material;
a shaping section which is configured to be filled by the concrete material that is pressurized and to define at least lateral dimensions of one of said layers to be deposited;
an exit section pointing in a direction opposite to a feed direction of said print head; and
an exiting prevention section which is configured to prevent said concrete material from exiting in the direction of said feed direction of said print head;
wherein said conveying device is an auger device;
wherein said shaping section comprises a controllable profiling device which is configured to be able to vary a layer thickness of the one of said layers to be deposited; and
wherein said controllable profiling device is configured to form at least one section along a width direction of the one of said layers made of concrete material to be concave with regard to the layer thickness.