Design and simulation analysis of an extrusion structure based on screw extrusion 3D printing
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Biaoqiang Liu
,
Zhentao Hu
Abstract
In response to the problems of 3D printing, such as uneven wire discharge and easy clogging of printing nozzles in FDM (Fused Deposition Modeling) printing technology, this paper develops a screw extrusion 3D printing melting deposition system based on simulation. The simulation results show that the maximum deformation of the screw occurs at the tail end, with a maximum value of 0.04 mm, while the fluid pressure and the pressure on the surface of the screw gradually increase along the direction of extrusion, and the maximum pressure occurs near the nozzle, with a value of 0.13 MPa. The fluid pressure is positively correlated with the screw speed and negatively correlated with the screw pitch. The fitting formula is obtained by numerical simulation of the screw speed and the flow velocity at the nozzle outlet. Using a self-made screw extrusion 3D printing equipment, relevant experiments are conducted to explore the influence of different layer thicknesses and line spacings on the mechanical properties of printed samples, as well as the influence of printing speed on surface quality. It is found that layer thickness has a significant impact on the bending strength of printed samples, with a maximum value of 24.74 MPa and a minimum of 19.21 MPa. The bending strength decreases by 28.79 % from 0.6 mm to 1.0 mm layer thickness. The line spacing has a significant impact on the tensile strength of printed samples, with a maximum value of 27.22 MPa and a minimum of 21.16 MPa. As the printing speed increases, the surface roughness of the printed piece also gradually increases from Ra = 389.28 μm at v = 30 mm/s to Ra = 535.45 μm at v = 70 mm/s, an increase of 37.55 %.
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Research ethics: Not applicable.
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Author contributions: The first author Biaoqiang Liu: Conceptualization, Data curation, Investigation, Project administration, Resources, Writing – review & editing. The second and the corresponding author Bo Qian: Data curation, Conceptualization, Formal analysis, Writing-Original Draft. The third author Zhentao Hu: Investigation, Validation. The fourth author Yuxin Liang: Methodology, Resources, Supervision. The fifth author Hongri Fan: Funding acquisition, Investigation, Resources.
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Competing interests: The authors declared that they have no conflicts of interest to this work.
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Research funding: This work is supported by Sponsored by National Natural Science Foundation of China [52205485].
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Data availability: The datasets used and/or analyzed during the current study available from the corresponding author on reasonable request.
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Artikel in diesem Heft
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Artikel in diesem Heft
- Frontmatter
- Review Articles
- Probing the microstructural properties of metal-reinforced polymer composites
- Advancements in chemical modifications using NaOH to explore the chemical, mechanical and thermal properties of natural fiber polymer composites (NFPC)
- Research Articles
- The effect of clay reinforcement of pine pollen grains on the mechanical, anti-corrosion and anti-microbial properties of an epoxy coating
- Influence of stacking sequence and nano-silica fortification on the physical properties of veli karuvelam – peepal hybrid natural composites
- An experimental validation of diffusion-based devolatilization models in extruders using post-industrial and post-consumer plastic waste
- Impact of filler type and proportion on the performance of rubberized coconut fiber-polystyrene composites
- Evaluation of the processing conditions on the production of expanded or plasticized wood plastic composite with cashew nutshell powder
- Irradiation of PMMA intraocular lenses by a 365 nm UV lamp
- Design and simulation analysis of an extrusion structure based on screw extrusion 3D printing
