Removable build plate for three-dimensional printers

A build plate for a three-dimensional printer, the build plate comprising:

• a sheet having a top surface exposed to form a build section, the build section substantially planar in the absence of an external force, the sheet formed of a first material along the build section, the first material including a ferromagnetic component, and the first material having a first thermal conductivity;
• a frame disposed entirely around a perimeter of the sheet, the frame at least as flexible as the sheet, and the frame including a second material having a second thermal conductivity less than the first thermal conductivity of the first material;
• and
• one or more tabs coupled to the frame, each tab thermally insulated from the first material of the sheet by at least the second material of the frame, and each tab graspable by a user to move the build plate.

A build plate system of a three-dimensional printer, the build plate system comprising:

• a build plate including a sheet having top surface that is exposed to form a build section, the sheet formed of a first material including a ferromagnetic component along the build section;
• a frame around a perimeter of the sheet, the frame formed of an elastomeric material that elastically flexes with the sheet, the elastomeric material having a second thermal conductivity that is less than a first thermal conductivity of the first material of the sheet, and the elastomeric material positioned to insulate an exposed surface of the frame from a temperature of the sheet;
• and
• a backbone structure including a body and a plurality of magnets supported by the body, the build plate coupled to the backbone structure via a magnetic force of the plurality of magnets exerted in a first direction on the ferromagnetic component along the build section of the sheet, and the sheet of the build plate slidable relative to the body in a second direction perpendicular to the first direction of the magnetic force.