3D 3D PRINTER FOR DUMMY

The present invention relates to a 3D printer for dummy, which has an improved structure. More specifically, the 3D printer applies heat to an inner cylindrical body and a head by using a heating means which is a sheet heating body, to preheat a container made of a synthetic resin material, thereby preventing the curing of a material in the container; facilitates the ejection of the material by rapidly delivering heat toward a nozzle made of a metal material; couples a coupling cylindrical body provided with the heating means to the inner cylindrical body in a separable manner, so that in case of malfunctions, only the coupling cylindrical body needs to be replaced, thereby facilitating the maintenance, repair and management; when supplying the heat, differentiates the heat delivered to the material and the heat delivered to the nozzle from each other, thereby preventing an end portion of the nozzle from clogging due to curing of the material while facilitating the ejection of the material. The 3D printer of the present invention comprises: a frame including a guide and a molding plate; and an ejection unit which includes a head operating in x-axis and y-axis directions along the guide and a nozzle installed inside the head and configured to eject a material stored inside by a pressure transferred from a press unit, and forms a 3D article on the molding plate. More particularly, the ejection unit comprises: a vessel which is connected to the press unit, includes a piston configured to move downward by a pressure by the press unit, and stores the material therein; a nozzle which is coupled to a lower end of the container and from which the material is press-ejected by a pressure generated by the piston being pushed downward; an inner cylindrical body which is provided above the head and surrounds the outside of the vessel; an outer cylindrical body which surrounds the outside of the inner cylindrical body; and a heating means which is provided outside the inner cylindrical body and the head, and heats up as an external power is applied thereto, thereby heating the material inside the container and the nozzle. 본 발명은 면상발열체인 가열수단을 이용하여 내통체와 헤드에 열을 가열하여 합성수지재의 용기를 예열하여 용기 내에 담겨진 사물 원료의 경화를 예방하고 금속소재인 노즐측에 열 전도가 신속하게 전달되어 사물 원료의 분출이 원활하게 이루어지도록 하고, 가열수단이 구비된 결합통체를 내통체에 착탈 가능하게 결합시켜 고장 발생시 결합통체만을 교체하여 유지 보수관리가 간편해짐과 아울러, 사물 원료에 전달되는 열과 노즐에 전달되는 열을 차등지게 공급함으로써 노즐 단부의 사물 원료 경화로 인한 막힘 현상을 예방하면서 사물 원료의 분출이 원활하게 이루어지도록 그 구조가 개선된 사물 3D 프린터에 관한 것이다. 본 발명은 가이드와 조형판이 포함된