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Showing 1 to 20 of 38 for “"Material Extrusion"”.
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3D Printing on Textile Fabrics Based on Material Extrusion
… involves a process where the thermoplastic material is melted and extruded through printing nozzle in a pattern to create the designed object layer by layer. Small desktop FDM equipment becomes popular for domestic uses to create objects due to its low price and easy access to different …
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Multi-Axis Material Extrusion Additive Manufacturing of Continuous Carbon Fiber Composites
Material extrusion is a common form of 3D printing that has historically been limited to producing prototypes, models, and low load-bearing parts. This is primarily because parts are manufactured layer-by-layer, resulting in poor adhesion along the build direction, and machines struggle to print …
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Topology and Toolpath Optimization via Layer-Less Multi-Axis Material Extrusion
… the family of technologies typically deposit material on a layer-by-layer basis. For material extrusion (ME) in particular, the deposition process results in weak inter- and intra-layer bonds that reduce mechanical performance in those directions. Despite this shortcoming, ME offers the …
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Experimental Investigations into the Accuracy and Precision of Material Extrusion Additive Manufacturing
Material Extrusion Additive Manufacturing (ME AM) is one of the most popular AM technologies thanks to its ease of use and ability to produce complex shapes from a range of materials at a comparatively low cost. However, it is commonly characterised by poor quality, including unsatisfactory surface …
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Material and process development for material extrusion metal additive manufacturing using recycled nickel
Metal Extrusion 3D-printing is a cost-effective alternative to powder bed fusion for producing metal parts, but limited material compatibility with this technique and reliance on virgin resources hinder wider adoption and raise sustainability concerns due to the depletion of natural resources. This …
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Material Extrusion based Additive Manufacturing of Semicrystalline Polymers: Correlating Rheology with Print Properties
Filament-based material extrusion (MatEx) additive manufacturing has garnered huge interest in both academic and industrial communities. Moreover, there is an increasing need to expand the material catalog for MatEx to produce end use parts for a wide variety of functional applications. Current …
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Process and Material Modifications to Enable New Material for Material Extrusion Additive Manufacturing
The overall goal of this work is to expand the materials library for the fused filament fabrication (FFF) material extrusion additive manufacturing (AM) process through innovations in the FFF process, post-process, and polymer composition. This research was conducted at two opposing ends of the …
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Process/Structure/Property Relationships of Semi-Crystalline Polymers in Material Extrusion Additive Manufacturing
Material Extrusion additive manufacturing (MEX) represents the most widely implemented form of additive manufacturing due to its high performance-cost ratio and robustness. Being an extrusion process in its essence, this process enables the free form fabrication of a wide range of thermoplastic …
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An Experimental Investigation into the Dimensional Quality of the Material Extrusion Additive Manufacturing Process
Material Extrusion Additive Manufacturing (ME AM) also known as fused deposition modelling is a popular manufacturing process. It is seen as an attractive alternative to many conventional manufacturing techniques due to its cost effectiveness, ease of adoption, and the ability to produce complex …
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Additive Manufacturing Filled Polymer Composites for Environmental Contaminants: Material Extrusion Processing, Structure and Performance
… and focus of this dissertation is exploration of Material Extrusion (MatEx) based Fused Filament Fabrication (FFF) of filled polymer composites as a disruptive technology enabler for deployable and retrievable structures in environmental media for adsorption, destruction and toxicity reduction of …
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Polylactic Acid based Blends and Composites for Material Extrusion 3D Printing: Formulation, Characterization, and Processing
… cellulose nanocrystals (CNCs), suitable for material extrusion 3D printing. In the first part, epoxidized canola oil (ECO), was utilized as a compatibilizer for PLA/PBAT blends at different weight ratios to produce toughened materials suitable for 3D printing applications. The incorporation …
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Machine learning-based stress-strain prediction and process parameter optimisation in material extrusion additive manufacturing
Material extrusion (MEX) additive manufacturing (AM) has emerged as a widely adopted method for fabricating complex polymer components, particularly in customised and lightweight engineering applications. However, the layer-by-layer deposition process inherent in this technique results in …
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Processing rate and energy consumption analysis for additive manufacturing processes : material extrusion and powder bed fusion
… thesis looks at the heat transfer mechanisms in material extrusion and powder bed fusion processes. In all the models developed for these two processes, processing rate is bounded by an adiabatic rate limit at which all the input energy is perfectly utilized to heat up the material to its …
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Improving the strength of fused filament fabrication parts by non-planar alignment of material extrusion wih stress vectors
… parts through non-planar alignment of material extrusion with stress vectors. Research progresses from initial proof-of-concept studies to developing comprehensive methodology for stress-aligned, non-planar toolpath generation. Work begins with investigating non-planar layer effects on …
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Additive Manufacturing of Electrical Machines and Electronic Devices
… such devices on a single, affordable machine: a material extrusion 3D printer. Material extrusion stands out among additive manufacturing technologies for its widespread availability and its compatibility with monolithic multi-material manufacturing, essential for the fabrication of functional …
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A Physical Hash for Preventing and Detecting Cyber-Physical Attacks in Additive Manufacturing Systems
… A proof-of-concept validation was realized on a material extrusion machine. The implementation was successful and demonstrated the ability of this method to detect the existence (and absence) of malicious attacks on both process parameters and the toolpath. A case study for detecting changes to …
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Enhancing the Capabilities of Large-Format Additive Manufacturing Through Robotic Deposition and Novel Processes
… the capabilities of large-format, polymer material extrusion, additive manufacturing (AM) systems. Specifically, the aims of this research are to (1) Construct, and develop a robust workflow for, a large-format, robotic, AM system; (2) Develop an algorithm for determining and relaying …
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Multi-material Non-planar Additive Manufacturing for Conformal Electronics on Curvilinear Surfaces
… manufacturing (AM) technologies, such as microextrusion 3D printing processes, offer the ability to fabricate conformal electronics with impressive structure and function on curvilinear substrates. Although various available methods offer conformal 3D printing capability on objects with limited …
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Monolithically 3-D Printed, Quadrupole Mass Filter for High-Precision, Compact, CubeSat Mass Spectrometry
… The devices were made using an advanced, multi-material extrusion printer. The devices are tested as RFonly collision cells for use in miniaturized triple quadrupole mass spectrometers and as quadrupole mass filters for miniaturized mass spectrometers (we detected argon at a resolution of 5 and …
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Additive Manufacturing of Commercial Polypropylene Grades of Similar Molecular Weight and Molecular Weight Distribution
Filament-based material extrusion additive manufacturing (MEAM) is an established technique in additive manufacturing (AM). However, semicrystalline polymers, such as polypropylene (PP), have limited commercial use in MEAM processes in the past due to their rapid crystallization kinetics and the …
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