Container arrangement of an unpacking device for a manufacturing device, unpacking device having such a container arrangement, and manufacturing device

A container arrangement of an unpacking device for a manufacturing device for additive manufacturing of a three-dimensional component by selectively solidifying pulverulent construction material, the container arrangement comprising:

• a construction container for the manufacturing device, the construction container comprising a construction chamber for simultaneously receiving the three-dimensional component that is produced in the construction chamber from construction material powder, and loose construction material powder in an inert atmosphere,
• a collecting container releasably connected to the construction container, the collecting container comprising a collecting chamber for receiving the loose construction material powder originating from the construction chamber of the construction container, and
• an interior formed by the construction chamber of the construction container and a collecting-container-side part that is arranged outside the construction chamber of the construction container, wherein the interior comprises the collecting chamber of the collecting container, and the interior is sealed off from surroundings of the container arrangement,
• wherein
• the construction container comprises an openable and closable container cover for the construction chamber, and the inert atmosphere of the construction chamber is sealed off from the collecting-container-side part of the interior of the container arrangement by closing the container cover,
• with the container cover of the construction container being closed, the collecting-container-side part of the interior of the container arrangement is capable of being filled with the inert atmosphere,
• the container arrangement further comprising an opening device for the container cover of the construction container, wherein the opening device is actuable from outside the interior of the container arrangement, wherein, with the collecting-container-side part of the interior of the container arrangement being filled with the inert atmosphere, the opening device is configured to open the closed container cover of the construction container with an opening movement in a direction of the collecting chamber of the collecting container, thereby connecting the construction chamber of the construction container to the collecting chamber of the collecting container.