Research on Bubble Removal Mechanism of Screw-Propelled 3D Printer

Abstract

The new screw-propelled 3D printer can realize 3D printing with granular plastic materials. The granular plastic material cost low and need not pay more attention on material flexibility. In this paper, the motion characteristics of bubbles produced in the printing processing of the screw-propelled 3D printer are studied. Through the analysis of the screw structure, and establish the corresponding three-dimensional model, the flow field of screw propulsion system is established by using FLUENT software. Through the simulation, the effects of the speed of the screw propeller, inlet pressure and screw pitch on the velocity of the bubble rise is studied. And the different locations of the bubble are concerned. In order to make the bubble escape from the fluid, a new structure of screw propeller is improved. The simulation result shows this improved structure can get a good performance to help to remove the bubbles in molt plastic material. And the fluid leakage can be compensated by increase the speed of the screw propeller.