Heating/cooling of a process chamber of a manufacturing device for additive manufacturing of three-dimensional components

An improved manufacturing device for additive manufacturing of three-dimensional components by layer wise application within an enclosed process chamber, the improvement comprising:

• a coating unit including an elongated coating arm, the coating arm being mounted for movement within the process chamber and having an encompassing exterior to the coating arm extending within the process chamber;
• a drive that moves the coating arm with a motor, the motor being physically connected to the coating arm;
• a radiation unit that applies radiation to heat and fuse building material within a build area of the process chamber to selectively solidify the building material in layer-wise fashion to create a solid object;
• a first heat reflecting layer covering the encompassing exterior of the coating arm in its entirety;
• a partition wall at least partially separating the motor from the process chamber, wherein a part of the coating arm extends through the partition wall;
• and
• a second heat reflecting layer coating a surface of the partition wall that faces the process chamber and through which the coating arm extends and which reflects heat away from the partition wall, wherein the first and second heat reflecting layers combining to reduce heat transfer from the coating arm and process chamber to the motor;
• a second partition wall in a ceiling region and defining an intermediate space;
• and
• at least one of an optical camera located in the intermediate space, a radiant heater located in the intermediate space, and a fluid guide configured such that a gas is flowable through the intermediate space,
• wherein the second partition wall comprises at least one opening, in a region of the optical camera or the radiant heater.