An intrinsic sensing ram extruder with pressure and volumetric flow control for liquid deposition modeling

Abstract

In this dissertation, a ram extruder for liquid deposition modeling (LDM) with a flexible actuation system is proposed. The system allows the command of flow through either pressure or volumetric modes. A mathematical model of the extruder is implemented. The actuation system enables real-time monitoring of pressure and material flow rate, providing benefits for precise control and adjustment during the printing process. Additionally, the system allows for the classification of material viscosity characteristics, offering in-depth information on the material for further analysis of the printing process. The prototype provides the advantage of both pressure and volumetric flow, as well as the ability to assess the material's response. In conclusion, this dissertation enhances the performance of ram extrusion in 3D printing.