Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Polymer extrusion."”.
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Optimal design and analysis for polymer extrusion and molding
… which can be used to improve the production of polymer components manufactured via the extrusion, injection molding, and compression molding processes. The design methodology employs polymer process modeling, design sensitivity analysis, and numerical optimization. It is applicable to systems …
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Creation of controlled polymer extrusion prediction methods in fused filament fabrication. An empirical model is presented for the prediction of geometric characteristics of polymer fused filament fabrication manufactured components
… machine engineering, tool-path programming, polymer science and rheology. Combining these research fields has allowed for an understanding of the FFF process which has been presented in its simplest form allowing FFF users of all levels to incorporate the empirical model into their work …
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The development of positron imaging systems for applications in industrial process tomography
… applications such as fluidised beds and polymer extrusion plant.
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Characterization and processing of composite PP/UHMWPE filament for fused deposition modelling application
… successful processing in both filament extrusion and FDM processes. MTT assay was also conducted to investigate the composite toxicity. Full and Fractal Factorial Design were employed to investigate the effect of process parameters on the process response for filament extrusion and FDM …
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Thermal homogeneity and energy efficiency in single screw extrusion of polymers. The use of in-process metrology to quantify the effects of process conditions, polymer rheology, screw geometry and extruder scale on melt temperature and specific energy consumption
Polymer extrusion is an energy intensive process whereby the simultaneous action of viscous shear and thermal conduction are used to convert solid polymer to a melt which can be formed into a shape. To optimise efficiency, a homogeneous melt is required with minimum consumption of process energy. …
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Thermorheology and processing of polyethylene blends : macromolecular structure effects
… melting thermograms have shown three different polymer phases; two for the pure components and a third melting peak of co-crystals. Different rheological techniques were used to check the thermo rheological behavior of all blends in the melt state and the effect of long chain branching. It was …
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Standardization of recycled plastic materials for additive manufacturing
Polymer extrusion-based additive manufacturing (AM) or 3D printing is a process that creates an object from a 3D model, a feedstock polymeric material in the form of wires or pellets, and a 3D-printer equipped with an extruder. Recycled polymeric materials can be used as feedstock for this …
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CFD studies of complex fluid flows in pipes
… fluids in industrial applications such as polymer extrusion. Results are also reported for the effects of transversal vibration on heat transfer and temperature uniformity in Newtonian and non-Newtonian shear thinning fluids. Vibration was found to generate sufficient chaotic fluid motion …
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Non-isothermal non-Newtonian flow and interlayer adhesion in Large Area Additive Manufacturing polymer composite deposition.
… of short carbon fiber reinforcement to the polymer feedstock. The addition of short carbon fibers improves the anisotropic mechanical and thermomechanical properties of printed beads which are dependent on the spatially varying orientation of carbon fibers. In this research, the finite …
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Rheological and Thermal Insights into Solidification Dynamics in Extrusion-Based Additive Manufacturing of Polymer Composites
Polymer extrusion-based additive manufacturing (EB-AM) is a processing technique that allows building 3D parts by depositing liquified material layer by layer, which solidifies to form a solid structure. Its key advantages over traditional methods like injection molding include design flexibility, …