High temperature 3D printing via inverted heated build chamber

A three dimensional (3D) printer capable of printing at temperatures 200° C. or greater comprising:

• an inverted build chamber that is open on the bottom comprising:
• an insulated heated print bed comprising a print surface, wherein the insulated heated print bed is inverted such that the print surface is oriented towards the open bottom of the inverted build chamber and wherein the insulated heated print bed forms thea top wall of the inverted build chamber;
• one or more insulated side walls, wherein each of the insulated side walls is coupled to the insulated heated print bed and extend vertically away from the heated print bed, and
• wherein the one or more side walls are configured to enclose the heated print bed and are positioned such that the one or more side walls are perpendicular to the insulated heated print bed so as to form the inverted build chamber that is open on the bottom;
• a heater coupled to the inverted build chamber, wherein the heater is configured to heat insulated side walls to 200° C. or greater;
• a print head assembly comprising:
• an extruder configured to receive, heat, melt, and expel a filament, wherein the extruder comprises a nozzle through which a melted filament can be expelled, wherein the nozzle of the extruder is oriented upwards towards the print surface of the insulated heated print bead to expel and deposit the melted filament onto the print surface of the insulated heated print bed or onto a layer of material present on the print surface of the heated print bed;
• and
• a three-axis movement assembly coupled to the print head assembly, wherein the three-axis assembly is configured to move the print head assembly and is configured to maintain the print head assembly in a fixed position within the inverted build chamber or is configured to move the print head assembly in zero to three dimensions within the inverted build chamber and the build chamber is capable of moving in zero to three dimensions.