| 摘要 |
The present invention relates to a print head in a direct printing method for spraying high-viscous materials. The present invention provides a printing apparatus comprising an actuator unit generating oil pressure through a predetermined motor motion; a cylinder unit filled with printing materials; and a nozzle unit spraying the printing materials, wherein the actuator unit comprises a piston rod delivering the external power generated by a predetermined motor motion; and an oil filled cylinder generating oil pressure by moving according to the external power delivered by the piston rod within the cylinder filled with predetermined oil. |
