| 摘要 |
The present invention relates to a nozzle assembly for a three-dimensional printer, which includes a nozzle that melts a wire-type plastic raw material to supply the plastic raw material to the outside, wherein the nozzle comprises: a heat conduction injector tip that uses heat supplied from a heater to melt the plastic raw material supplied into the heat conduction injector tip and supply the plastic raw material to the outside, and is formed of a thermally conductive material; a backflow prevention tube, which is connected to the heat conduction injector tip, guides the supply of the plastic raw material to the heat conduction injector tip, and is formed of a heat resistance material to confine a backflow of the plastic raw material molten by the heat conduction injector tip; a connecting tube coupled to the heat conduction injector tip such that the backflow prevention tube is installed in the connecting tube; a blocking plate fixed to an end part of the heat conduction injector tip and preventing the molten plastic raw material, supplied from the heat conduction injector tip to the outside, from being attached to the end part of the heat conduction injector tip; and a heat conduction block, which is provided on the heat conduction injector tip and is disposed at the upper side of the blocking plate, which is provided with a heater that supplies heat needed for melting the plastic raw material, and which is formed of a thermally conductive material to supply the heat from the heater to the heat conduction injector tip. According to the present invention, heat is prevented from being applied to an output produced through a supply of a plastic raw material, thereby preventing a backflow of a molten plastic raw material and the attachment of a foreign substance to the output which would otherwise occur if the output is reheated. |
