Three-dimensional printer of fused deposition modeling

A three-dimensional printer for fused deposition modeling, comprising:

• a printing plate (300) comprising a silicon thermal plate (330);
• a nozzle part (100) configured to heat a filament to a sufficient temperature to eject the filament onto the printing plate (300);
• a means configured to move the nozzle part (100) relative to the printing plate (300) to allow the filament ejected from the nozzle part (100) to stack and to form a printed object on the printing plate (300);
• and
• a cooling part (200) provided on the nozzle part (100), the cooling part comprising a radiating plate (210), a fan (220) configured to cool the radiating plate (210), a transferring member (230) configured to couple the cooling part (200) and nozzle part (100) to the means, a lower plate (232) coupled to the transferring member (230), a ceramic paper attached to an upper surface of the lower plate (232), and a thermal plate (236) inserted into the lower plate (232),
• wherein the lower plate (232) has a through hole (233) and is coupled to the transferring member (230) such that a lower end of the nozzle part (100) is fitted in the through hole (233);
• wherein the thermal plate (236) is arranged to face an upper side of the printed object and configured to generate heat that hardens the filament ejected from the nozzle part (100) and simultaneously locally heats the upper side of the printed object stacked on the printing plate (300);
• wherein the ceramic paper is configured to direct the heat generated from the thermal plate (236) downwardly towards the upper side of the printed object and to insulate the transferring member (230) from the heat generated by thermal plate (236);
• and
• wherein the silicon thermal plate (330) is configured to generate heat that travels from a lower side of the printed object upwardly towards the upper side of the printed object to harden the filament ejected from the nozzle part (100) and simultaneously prevent shrinkage of the filament ejected from the nozzle part (100).