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 20 of 141 for “"extruder"”.
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Designing the Sugar Cane Charcoal Extruder
The Sugar Cane Charcoal Extruder compresses carbonized sugar cane into charcoal briquettes. that are environmentally-friendly and comparable to wood charcoal in burn performance, cost, and durability. Originally developed in the fall semester of 2004 in the MIT course 2.009, Product Engineering …
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Development of Dual Extruder Biomaterial 3D Printer
… the design and fabrication of a novel dual-extruder biotic 3D printer for the precise deposition of natural biocomposites using organic materials such as pectin, chitosan, and cellulose. Unlike traditional FDM printers that rely on thermoplastic extrusion, this printer employs a …
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Development of a multi-purpose twin-screw extruder
… in which mainly single process twin-screw extruders are used. This leaves a void for the development for a multi-purpose twin-screw extruder. This will enable companies to manufacture a greater diversity of products with one machine, not only in South Africa, but in the rest of Africa as …
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Advanced applications of numerical modelling techniques for clay extruder design.
… manufactured using an extrusion process in auger extruders. During their long history of application in the ceramic industry, most of the design developments of extruder systems have resulted from expensive laboratory-based experimental work and field-based trial and error runs. In spite of these …
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Modeling abrasive wear of a 3D printer extruder drive mechanism
… This investigation focuses on a prototype extruder mechanism that utilizes two counter rotating motors to force filament through the nozzle. The plastic passes through the armateurs of the two motors and the oppositely-threaded shafts drive the filament while balancing each others torque. …
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Novel Application of Twin Screw Extruder on Production of Diverse Formulations
Twin-screw extruder has attracted considerable attention in the pharmaceutical industry as an alternative processing instrument due to its advantages compared to other conventional equipment, such as economical processing, small footprint, reduced in-process times, solvent-free and continuous …
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Flow and mixing studies in a co-rotating intermeshing twin screw extruder
… 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 …
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Design, construction, and testing of a ram extruder for high viscosity polymers.
Massachusetts Institute of Technology. Dept. of Mechanical Engineering. Thesis. 1973. M.S.
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The identification and validation of case hardening for extending charcoal briquette extruder lifespan
… solution to increase the wear resistance of the extruders by diffusing carbon into key components of the machine such as the screw. Several steps were taken at MIT D-Lab to validate the case hardening strategy including measuring the carbon content of steel samples from AEST's machines; designing …
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Characterization of dispersive and distributive mixing in a co-rotating twin-screw compounding extruder
… 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 …
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Continuous Devulcanization of Ground Tire Rubber of Different Particle Sizes Using an Ultrasonic Twin-Screw Extruder
… using an ultrasonic co-rotating twin-screw extruder at ultrasonic amplitudes from 5 to 13 µm and a frequency of 40 kHz. Ultrasonic power consumption and die pressure during devulcanization, curing behavior of devulcanized rubber, gel fraction and rheological properties of devulcanized and …
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Evaluating abrasive wear resistance of extruder tooling materials using the dry sand rubber wheel abrasion test
… currently used to manufacture tooling for extruders to determine if the ASTM G65 dry sand rubber wheel abrasion test could be used as an accelerated test to evaluate candidate materials. Samples were tested in the heat treated condition and after surface modification by plasma ion …
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INVESTIGATING RHEOLOGICAL TECHNIQUES TO MODEL AND PREDICT OPERATING CONDITIONS OF A SINGLE SCREW EXTRUDER WITH INTERNAL RESTRICTIONS
… Both off-line capillary rheometry and in-line extruder fed rheometry techniques have been used to model rheology of materials during extrusion. Investigations on use of an off-line capillary rheometer to model apparent viscosity of full fat soy flours revealed inability of the capillary …
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Flow field analysis of some mixing and conveying screw element regions, within a closely intermeshing, co-rotating twin-screw extruder.
… 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 in the internal mixer …
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Understanding the Role of Extrusion Processing Parameters on Functional Properties of Distillers Dried Grains Extruded Using Single and Twin Screw Extruder
<p>Com distillers dried grains (DDG) were extruder in a com meal base using single screw extruder and twin screw extruder to study the functional properties of the resulting extrudates. Four different studies were done to see that if formulations were treated differently then there will be …
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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
… across the melt flow at the entrance to the extruder die. Moreover, an infrared sensor flush mounted at the end of the extruder barrel was used to measure non-invasive melt temperature profiles across the width of the screw channel in the metering section of the extruder screw. Both …
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Study of single-screw extruders for continuous feeding of canola paste for supercritical fluid extraction
The suitability of using a single-screw extruder to feed Canola seeds continuously into a supercritical fluid extractor was studied. The experiments were conducted with a custom-built extruder (0.44 m long, 36.75 mm ID barrel) fitted with a screw having a single flight 4.9 mm high and 3 mm wide. …
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