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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 20 of 746 for “"extrusion"”.
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Extrusion of Solid Hydrogen
Made available in DSpace on 2017-07-06T18:49:08Z (GMT). No. of bitstreams: 2 Kuhn_Thomas_R_MS.pdf: 16060935 bytes, checksum: eabeaf6e84659f75f53be1c9a0f83fe9 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1977
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High Moisture Extrusion of Oatmeal
… more convenient to consumers. Low moisture extrusion processing is one of the most widely used methods to produce ready to eat breakfast cereals; however, there has been little research carried out to determine if high moisture extrusion methods would be viable. This study evaluated the …
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Simulation of aluminium extrusion process.
The aim of this thesis is to model the extrusion process conditions for some aluminium alloys using Finite Element Modelling (FEM) program. All the simulations were performed with the implicit finite element code FORGE20 (2-D) and FORGE3® (3-D). In this work only the alloys AA2024, AA2014, Al-1 %Cu …
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Genome organization by loop extrusion
… presents a detailed analysis of the recent "loop extrusion" hypothesis of the SMC action. This hypothesis postulates that, upon binding to chromosomes, SMCs progressively bridge sites that are further away along the chromosome, thus extruding a loop. The collective action of loop extruding SMCs is …
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Copolymerisation of polyesters using reactive extrusion
… PBAT. Upscaling this process in reactive extrusion revealed that a screw configuration constructed with at least 50% kneading blocks is necessary to achieve critical processing parameters, including a minimum residence time of four minutes and an average degree of fill of 0.5. In …
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High-throughput extrusion-based additive manufacturing
… thesis seeks to understand the rate-limits to extrusion-based AM, commonly referred to as fused deposition modeling (FDM), and to demonstrate this understanding via the design and fabrication of a high-throughput extrusion AM platform. Three subsystems - the pinch wheel extruder, the conduction …
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Hot-melt extrusion: A versatile pharmaceutical technology
Hot-melt extrusion (HME) is a promising technology for the production of new chemical entities in the developmental pipeline and for improving products already on the market. The first objective of this research work was to describe a continuous process for the production of solid lipid …
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Novel Applications of Hot-Melt Extrusion Technology
Hot-melt extrusion, an adaptable technology, has established its position in a wide spectrum of manufacturing operations like amorphous solid dispersions, immediate and controlled oral formulations, implants, and taste masked products. In recent years the industrial focus has shifted towards …
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Numerical modelling of the aluminium extrusion process
The extrusion of aluminium alloys involves the shaping of the product from an homogenised billet into a complex shape. In addition the properties of the extrudate are closely related to the processing parameters (temperature, stain rate, and material morphology). Since all the parameters vary …
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Modeling methods and die design in extrusion
The process of extrusion consists of placing a cylindrical billet in the cylinder of an extrusion press and forcing the metal through an orifice or die opening having the shape of the desired product. In this work topics in extrusion of industrial interest are considered.
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Multimodal Polyethylene-Graphene Nanocomposite via Melt Extrusion
… of graphene, on a semi-industrial scale extrusion system that can be scaled up to full industrial scale production for an application. The well-dispersed and uniformly distributed graphene platelets throughout a multimodal-polymer matrix, with a strong interfacial bonding between the …
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Evaluation of effect of extrusion process variables on mechanical properties of extruded collagen tubes and effect of post extrusion treatments
This study evaluated the effect of extrusion process variable on mechanical properties of extruded collagen tubes made using a specialized extruder, made by ZOKO Corporation of Czechoslovakia. Three extrusion variables were considered; extrusion speed, linear draw rate and rotation speed. Using …
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Extrusion honing using mixtures of polyborosiloxanes and grit
Extrusion honing is a technique used for the finish machining of engineering components. The process may be used to deburr, radius or polish depending on the specific application. Extrusion honing utilises a polyborosiloxane polymer, which is mixed with fine abrasive particles and forced through or …
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Designing Polymer Hydrogels for Extrusion-Based Additive Manufacturing
… particular, are seeing significant interest in extrusion-based AM for the fabrication of bespoke medical implants and tissue engineering. The responsiveness of these “smart” hydrogels makes them suitable for AM and provides functionality to the additively manufactured objects. The type of …
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Direct Extrusion Printability of Internal Phase Nanostructured Hydrogels
An experimental study in open-air direct extrusion of fatty acid-based ternary system gels is presented. When promising self-supporting mechanical abilities are observed in some pure ternary experiments, photoinitiators and hydrogel monomers are introduced to stabilize structures printed from these …
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