Coater Arrangement For A 3d Printer And Method For Applying Two Layers Of Particle-shaped Construction Material

A coating device arrangement (1) for a 3D printer (100), comprising:

• a coating device (3) having a container (17) defining an inner cavity for receiving particulate construction material (PM) which leads to an opening for outputting the particulate construction material, and a stroking member (15a), by which a downward oriented stroking surface is formed and which is configured to stroke over construction material output from the opening using the stroking surface, to thereby level and/or compress the output particulate material,
• characterized by
• a setting device (13) configured to variably set an inclination angle (α) of the stroking surface.

A coating device arrangement (1) according to 24 wherein the coating device (3) is formed as a bidirectional coating device configured to output construction material on a journey and on a return journey of the coating device, the coating device (3) comprises a stroking member (15a, 15b) on each of two opposite sides of the opening, so that particulate construction material output from the opening during the journey can be stroked using a first one of the stroking members, and particulate construction material output from the opening during the return journey can be stroked using a second one of the stroking members, and

• the setting device (13) is configured to set the inclination angle (α) of the stroking surface of the first stroking member (15a) for a leveling and/or compression of the output particulate construction material for the journey, and to set the inclination angle (α) of the stroking surface of the second stroking member (15b) for a leveling and/or compression of the output particulate construction material for the return journey.

A 3D printer (100), comprising a coating device arrangement (1), the coating device arrangement (1) having a coating device (3) having a container (17) defining an inner cavity for receiving particulate construction material (PM) which leads to an opening for outputting the particulate construction material, and a stroking member (15a), by which a downward oriented stroking surface is formed and which is configured to stroke over construction material output from the opening using the stroking surface, to thereby level and/or compress the output particulate material, characterized by a setting device (13) configured to variably set an inclination angle (α) of the stroking surface.