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Dissertations / Theses on the topic 'Twin screw co-rotating extruder'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Rodriguez, Veloz Oscar Alberto. "The development of laminar morphology in a co-rotating twin screw extruder." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0026/MQ50656.pdf.

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2

Singh, D. P. "Flow and mixing studies in a co-rotating intermeshing twin screw extruder." Thesis, Brunel University, 1988. http://bura.brunel.ac.uk/handle/2438/5548.

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The basic understanding of mixing in the process of polymer melt extrusion by twin screw extruder is limited by their geometrical complexity and the interactions of the process parameters. Mixing and flow in a 100mm diameter, trapezoidal channeled, intermeshing co-rotating twin-screw extruder have been characterised by determination of residence time distribution (RTD) and of the paths taken by tracers added to the melt. The axial mixing and the effects of varius parameters on it were established by studying RTD using tracer techniques. As the tail of the distribution is of paramount importanc

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3

Elsey, Justin Rae. "Dynamic Modelling, Measurement and Control of Co-rotating Twin-Screw Extruders." University of Sydney. Department of Chemical Engineering, 2003. http://hdl.handle.net/2123/687.

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Co-rotating twin-screw extruders are unique and versatile machines that are used widely in the plastics and food processing industries. Due to the large number of operating variables and design parameters available for manipulation and the complex interactions between them, it cannot be claimed that these extruders are currently being optimally utilised. The most significant improvement to the field of twin-screw extrusion would be through the provision of a generally applicable dynamic process model that is both computationally inexpensive and accurate. This would enable product design, proce

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4

Schuler, Werner. "Process engineering design of co-rotating twin screw extruders." Thesis, Swansea University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.572814.

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The intention of the work was to develop easy to use technical design methods which are helpful for the daily work of the process engineer, and which also describe the operating behaviour of both the whole extruder and the individual processing sections. This goal was achieved by developing new models or the further developing of existing models. The examination of the developed models by trials and on production lines showed good accuracy of the models. The following models, which are developed in the present work, are of particular interest for the technical design of extruders: • Simple mod

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5

Ess, J. W. "Characterization of dispersive and distributive mixing in a co-rotating twin-screw compounding extruder." Thesis, Brunel University, 1989. http://bura.brunel.ac.uk/handle/2438/5239.

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A new design of closely intermeshing co-rotating twin-screw compounding extruder, developed at Brunel University, has been utilized in the development of quantitative techniques for characterization of dispersive and distributive mixing in thermoplastics materials prepared by extrusion compounding. Image analysis procedures were used to quantify mixing of polypropylene composites containing calcium carbonate filler using reflected light microscopy on polished surfaces, and transmitted light microscopy of microtomed pigmented sections. Stereological statistics have been applied to raw sample da

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6

Ban, Kyunha. "Mechanism and Significance of Slip and New Mixing Elements During Flow in Modular Intermeshing Co-Rotating Twin Screw Extruders." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1218132059.

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7

Bruce, David P. "Flow field analysis of some mixing and conveying screw element regions, within a closely intermeshing, co-rotating twin-screw extruder." Thesis, Aston University, 1997. http://publications.aston.ac.uk/9602/.

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Grafting of antioxidants and other modifiers onto polymers by reactive extrusion, has been performed successfully by the Polymer Processing and Performance Group at Aston University. Traditionally the optimum conditions for the grafting process have been established within a Brabender internal mixer. Transfer of this batch process to a continuous processor, such as an extruder, has, typically, been empirical. To have more confidence in the success of direct transfer of the process requires knowledge of, and comparison between, residence times, mixing intensities, shear rates and flow regimes i

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8

Hojabr, Sassan. "Mathematical modeling and process investigation of melt grafting reactions in an intermeshing co-rotating twin screw extruder." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0004/NQ27829.pdf.

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9

Bumm, Sug Hun. "Mixing Studies and Simulation of Compounding Chopped Fiber and Silica Filler into Thermoplastics in a Modular Co-Rotating Twin Screw Extruder." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1271956146.

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10

Lai-F. "Melt conveying in counter-rotating twin-screw extruders." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37751.

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11

Cavailles, Fanny. "Génération par enrobage à sec de particules composites à propriétés d'usages contrôlées." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2016. http://www.theses.fr/2016EMAC0018/document.

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L’enrobage à sec par action mécanique permet de formuler des particules composites dont les fonctionnalités et les propriétés physiques, comme l’écoulement, sont améliorées et cela sans l’ajout de solvant ou de liant. Actuellement la plupart des procédés d’enrobage à sec sont conduits en mode discontinu. L’objectif de ce travail est donc de développer et d’étudier une opération d’enrobage à sec par un procédé continu innovant, une extrudeuse bi-vis corotative sans filière, constituant une rupture technologique dans son domaine. Dans le cadre de ce travail, des sphères de cellulose microcristal

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12

Jiang, Qibo. "Modeling Flow, Melting, Solid Conveying and Global Behavior in Intermeshing Counter-Rotating Twin Screw Extruders." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1216142037.

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13

Chen, Kuan-Yu, and 陳冠宇. "Defining the Configuration of Co-Rotating Twin-Screw Extruder using Reliability-Based Optimization." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/t7q265.

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14

Tan, Chun-Liang, and 陳春良. "Mixing Prediction of Co-Rotating Twin Screw Extruder via Three-Dimensional Flow Modeling." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/525esn.

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碩士<br>國立臺灣大學<br>工程科學及海洋工程學研究所<br>106<br>This research is to study the flow properties and mixing characteristics of a typical conveying and kneading element in a twin screw extruder via a numerical approach. An unsteady, three-dimensional model is implemented in this study under the assumptions of an isothermal and incompressible flow. By solving the continuity and momentum equation, physical quantities such as strain rate, velocity components and pressure, are obtained. The modified Cross-WLF model is employed to describe the rheological properties of the polymer adopted in this study. The co

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15

Silva, Sara Madalena Martins da. "Monitorização da fusão de polímeros em extrusoras de duplo-fuso." Master's thesis, 2014. http://hdl.handle.net/1822/35579.

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Dissertação de mestrado integrado em Engenharia de Polímeros<br>No âmbito da unidade curricular Dissertação de Engenharia de Polímeros, desenvolve-se um estudo que consiste na monitorização da fusão de polímeros em extrusoras duplo fuso, com vista à melhor compreensão fenomenológica deste processo. Para o efeito, é utilizado um dispositivo protótipo que permite a recolha rápida de amostras em diversas localizações, no sentido axial e radial da extrusora. Nessas localizações é possível medir a temperatura média do material e estimar o tempo local de residência. A conjugação da informação d

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16

Benkreira, Hadj, Rajnikant Patel, R. Butterfield, and Martin Gale. "Replication of mixing achieved in large co-rotating screw extruder using a novel laboratory 10-100g minimixer." 2008. http://hdl.handle.net/10454/809.

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Yes<br>When compounding polymers with additives to develop materials at specifications (colouring plastics is the simplest example), the difficulties is in getting the formulation right the first time. Also, when developing completely new materials such as in nanotechnology applications, there is a need to do the initial trials safely and with as small quantities as possible to enable a wide range of experimentation. Wiith traditional applications, often the initial compounding formulation is done using small single or twin screw extruders but with machines that have a fair output to instruct

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17

Stewering, Jörn [Verfasser]. "Dreidimensionale Simulation und Visualisierung von Strömungs- und Mischprozessen im Doppelschneckenextruder = Three-dimensional simulation and visualisation of flow- and mixing processes in the co-rotating screw extruder / vorgelegt von Jörn Stewering." 2008. http://d-nb.info/99085552X/34.

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