Modeling and analysis of the cooling process parameters of a 3d printer extruder
Students Name: Elyiv Ihor Yuriiovych
Qualification Level: magister
Speciality: System Design
Institute: Institute of Computer Science and Information Technologies
Mode of Study: full
Academic Year: 2023-2024 н.р.
Language of Defence: ukrainian
Abstract: Eliyev I.Yu., Zdobytskyi A.Y. (supervisor). Modeling and analysis of the cooling process parameters of the 3D printer extruder. Master’s thesis - Lviv Polytechnic National University, Lviv, 2023. The master’s thesis deals with the numerical analysis of heat transfer by the finite element method in a 3D printer extruder from a heating unit that has electrical resistance and controls the heat power supplied to the heated part of the polymer filament. Excess heat transferred by the heating unit is dissipated by a radiator to ensure proper operation of the 3D printer. The object of study is the process of heat transfer from the extruder heating unit to the elements of the cooling system. The subject of the study is the parameters of the thermoelectric cooling system for electronic components following thermomechanical loads. The aim of the work is to optimize the 3D printing parameters and the parameters of the 3D printer extruder cooling system for uniform distribution of thermal energy to ensure the proper quality of the resulting parts made using FDM technology. Even heat distribution ensures that the plastic flow rate is uniform, and the extruder can withstand both mechanical and thermal loads. Proper heat dissipation is crucial because it directly affects the extruder’s performance and thus the quality of the resulting product.The practical value of the work lies in the simulation modeling of the cooling process of electronic components and their optimization to ensure uniform heat distribution in the extruder to improve its performance and the quality of the product. Since the extruder, head must be compact and resistant to thermal loads; important 3D printing parameters include layer parameters, model orientation, and printing temperature. To achieve this goal, we are going to analyze the existing hotend printers based on FDM printing technologies, whose standard extruder (special print head) consists of a mechanical unit for feeding the molten mass of material and a nozzle with a heating unit. During operation, the hot zone of the extruder can reach extremely high temperatures, while other parts of the extruder remain cold. To analyze the temperature regimes of filament flow from the "cold" to the "hot" zones of the extruder, to 6 investigate CFD thermal process simulation tools, and to model the operation of the cooling system and optimize its design to improve the extruder’s performance and the quality of the product. The first section analyzes additive manufacturing technologies that involve layer-by-layer growth of parts, as well as the temperature distribution in the two most important areas that affect the thermal characteristics of a 3D printer. The second section outlines the prerequisites for simulation modeling of hydrogas-dynamic and thermophysical processes in CFD software and possible areas of its implementation. A comparative analysis of tools for modeling convective thermophysical processes is carried out, setting boundary conditions for volumetric heat release. The third section describes the stages of modeling thermophysical processes builds a model and analyzes the parameters of the cooling system for electronic components in the COMSOL Multiphysics environment. Keywords: 3D model, 3D printing, extruder, heat transfer, cooling, simulation modeling.