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 76 for “"moulds"”.
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Improved sol based ceramic moulds for use in investment casting
… of failure of silica bonded investment casting moulds, with the aim of reducing failure rates for larger components. The analysis begins with a detailed microstructural examination of a current commercial mould system using scanning electron microscopy and other allied analysis techniques. The …
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Metal-foam interface stability during the filling of lost foam moulds with aluminium alloys
… that was used simulate the casting of Lost Foam moulds at room temperature. The liquid degradation products of the polystyrene patterns were also found to be viscous, although this was reduced by treatment with Br. Under the same conditions of temperature and velocity, the interface observed …
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Optimization of the warm up process of the compression moulds for the tyre manufacturing industry
Submitted in fulfillment of the requirements of the degree of Master of Engineering: Mechanical Engineering, Durban University of Technology, Durban, South Africa, 2016.
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Multifaced stone and ceramic moulds from Bronze Age Anatolia : building an analytical protocol of mould properties and behavior during the process of metal casting
… of multifaceted serpentinite bronze-casting moulds from Bronze Age Anatolia (ca. 3500-1700 B.C.). These moulds represent a class of metal processing tools that reflect material properties and perhaps also social concerns in their development and use. In phase I of the protocol, standard …
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ΠΗΛΙΝΕΣ ΜΗΤΡΕΣ ΑΓΓΕΙΩΝ ΑΠΟ ΤΗΝ ΠΕΛΛΑ. ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΗΣ ΕΛΛΗΝΙΣΤΙΚΗΣ ΚΕΡΑΜΙΚΗΣ
THE STUDY DEALS WITH 330 MOULDS AND FRAGMENTS OF MOULDS FOR MOLDMADE RELIEF VASES OF THE HELLENISTIC PERIOD. THE MOULDS WERE FOUND IN A POTTERY WORKSHOP LOCATED IN THE MARKET PLACE (AGORA) OF HELLENISTIC PELLA; ALMOST EXCLUSIVELY WEREDISCOVERED IN THE DESTRUCTION DEBRIS OF TWO CONSECUTIVE ROOMS, …
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Fabrication of 316-L stainless steel and composite micro machine components using softlithography and powder metallurgy process
… In the first stage, high quality SU-8 master moulds and their negative replicas soft moulds are produced using Softlithography technique. The second stage includes preparing the stainless steel slurries, filling the soft micro moulds, obtaining the green micro components, de-binding and …
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The replication of micron scale pillar arrays for medical ultrasound applications
… is limited by the availability of suitable moulds, which must be replicated to make the process cost effective. This thesis reviews the micro replication and fabrication processes necessary to produce moulds for 1-3 piezocomposites, and characterises the replication process from hot …
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Modular making in kiln cast glass: repetition, efficiency, and the unique
… demanding, requiring multiple models and moulds to create the repeating copies of the desired modular parts. Yet once complete, these ancillary models and moulds – the tools of the casting process – can be used beyond their first intended purpose. In contrast with industrial use, in the …
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The window in local construction
… These can form part of the frame, e.g., weather moulds or drip moulds, or could be part of the walI housing the window, e.g., canopies.
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Electrochemical nanomoulding through proteins
… fixed by their encoded amino acid sequences, as "moulds" around which nanostructures can be built by electrochemical fabrication.Bacterial cell-surface layer proteins, or "S-layer" proteins, from two organisms---Deinococcus radiodurans and Sporosarcina ureae---were used as the "moulds" for …
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Boron induced surface modification of transition metals
… used in many industrial applications like ingot moulds, crucibles, biomedical implants, die-casting moulds, magnetic head applications, drawing dies etc. The objective of this work was to investigate the influence of boronizing on the properties of transition metals. Three transition metals, …
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The continuity of status in Iron Age settlements through metallurgical craft specialisation and material wealth
… and in particular an assemblage of metalworking moulds. The XRF analysis of these led to experimental work on the absorption of zinc into the fabric of fired clay moulds during the casting of copper alloys and to a review of previous XRF analyses of some Iron Age copper alloy artefacts and …
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Etude de l'activité antifongique des bactéries lactiques isolées de produits alimentaires fermentés et caractérisation de leurs métabolites inhibiteurs
… in MRS solid medium against food spoilage moulds as Aspergillus niger MUCL 28699, Aspergillus niger CWBIF194, Aspergillus tubingensis MP1 and Penicillium crustosum MY1. Three strains, Lactobacillus plantarum VE56, Weissella cibaria FMF4B16 and Weissella paramesenteroides LC11 were selected …
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Análise teórico-experimental do concreto jovem
… of the layers), the utilization of sliding moulds in the conventional construction and the analysis of the internal tensions that occur in the concretes during the phase in which these concretes are found in the interior of the moulds.
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Flexible formwork for concrete structures
… concrete instead being cast into rigid prismatic moulds to create high material use structures with large carbon footprints. Our rate of concrete consumption means that cement manufacture alone is estimated to account for some 5% of global Carbon Dioxide emissions.This dissertation shows that by …
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Exotic Monoliths
… larger diameter fused silica and PEEK capillary moulds. Photo-initiated polymerisation using both conventional UV lamps and light emitting diodes is also investigated, along with a novel application of LED synthesised monoliths, i.e. using short plugs of monoliths as retaining frits for column …
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Lithium-aluminium casting alloys and their associated metal-mould reactions
… Casting the alloys into sand and investment moulds creates a metal - mould reaction, the consequences of which are intolerable in the production of military hardware. The primary object of this project was to investigate and characterise the reactions occurring between the newly poured metal …
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Multi-scale modelling describing thermal behaviour of polymeric materials. Scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales.
… moulding is a type of moulding in which moulds have geometrical design features on a micrometer scale that must be transferred to the geometry of the produced part. The difficulties encountered due to very high shear and rapid heat transfer of these systems has motivated this …
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