3D printer to print objects and a shield

A method comprising:

• generating, by a processor, 3D print data including:
• data defining one or more objects to be printed in a build chamber of a 3D printer, the build chamber defined by a bottom surface and a plurality of sidewall surfaces, such that the build chamber has an open top side opposite the bottom surface;
• and
• data defining, in addition to the one or more objects, a shield to be printed to shield the one or more printed objects in the build chamber to reduce heat dissipation from the one or more printed objects to an outside of the build chamber, the shield having a design depending on either or both of a thermal behavior of the build chamber and a thermal behavior of the one or more objects to be printed;
• and
• causing, by the processor, the 3D printer to print the one or more objects and the shield in the build chamber in accordance with the 3D print data,
• wherein the shield comprises a portion between the open top side and where the one or more objects are to be printed in the build chamber, to reduce the heat dissipation from the one or more printed objects to the outside of the build chamber through the open top side.

A non-transitory computer-readable data storage medium storing instructions executable by a processor to perform processing comprising:

• generating 3D print data including:
• data defining one or more objects to be printed in a build chamber of a 3D printer, the build chamber defined by a bottom surface and a plurality of sidewall surfaces, such that the build chamber has an open top side opposite the bottom surface;
• and
• data defining, in addition to the one or more objects, a shield to be printed to shield the one or more printed objects in the build chamber to reduce heat dissipation from the one or more printed objects to an outside of the build chamber, the shield having a design depending on either or both of a thermal behavior of the build chamber and a thermal behavior of the one or more objects to be printed;
• and
• causing the 3D printer to print the one or more objects and the shield in the build chamber in accordance with the 3D print data,
• wherein the shield comprises a portion between the open top side and where the one or more objects are to be printed in the build chamber, to reduce the heat dissipation from the one or more printed objects to the outside of the build chamber through the open top side.