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 25 for “"HOT PRESS"”.
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Role of impurities, LiF, and processing on the sintering, microstructure, and optical properties of transparent polycrystalline magnesium aluminate (MgAl2O4) spinel, The
… and good mechanical properties. In this work, hot-press experiments were designed to determine the role of impurities and LiF and the key variables required to obtain transparent spinel. Hot-pressed compacts were characterized with electron microscopy, chemical spectroscopy, and …
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A study of the manufacturing and product possibilities of a cork/polylactic acid compound
… weight and 10% by weight. The material was then pressed in the flat sheets in a hot press and subject to rheological and mechanical testing. A simulation of the injection molding process was conducted using Autodesk's MoldFlowTMsoftware. Material property data was gathered and approximated and …
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Changes in wood-flake properties in relation to heat, moisture, and pressure during flakeboard manufacture
In an attempt to relate different pressing parameters to changes in test flake properties, eight hot-press cycles were used in the manufacture of 24 flakeboard panels, with 2 levels each of platen temperature, initial mat moisture content, and press closing time. Temperature and gas pressure …
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Mechanical Properties of Random Discontinuous Fiber Composites Manufactured from Wetlay Process
… be molded into random composite plaques in the hot-press. Investigations were done on the molding parameters that included the set-point mold pressure, set-point mold temperature and cooling methods. The fibers used in the study included glass and carbon fiber. Polypropylene (PP) and …
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Development and characterization of polyphthalaldehyde for transient applications
… casting as well as thermoforming via hot press molding. A photoacid generator (PAG) was incorporated into cPPA films to generate acid within the film in response to exposure to UV light. Acid cleaved the polymer backbone of cPPA and resulted in solid state depolymerization into the …
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Flexible Strain Detection Using Surface Acoustic Waves: Fabrication and Tests
… less-time dependent parameters, such as pressure and temperature, but also dynamic parameters like mechanical strains. The objective of this study is to develop a passive flexible SAW sensor with optimized piezoelectric properties that can detect and measure mechanical strains occurred in …
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The effect of heat compression on mechanical behaviour and moisture content of pineapple leaf fibre and sugarcane bagasse waste for plate disposal
… and sugarcane bagasse waste material. A platter hot press machine is built with variable adjustment temperature on the surface of the mold according parameters required are 50°C, 100°C and 150°C. The effect of heat compression on physical and mechanical behavior of the pineapple leave and …
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Measurement of resin pressure in composite laminates during cure
A promising method of measuring the resin pressure within a composite laminate during processing has been developed. This method can be used to investigate the control of voids, or resin flow and laminate compaction in several composite material processing methods such as ACND, hot press curing and …
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Feasibility study on producing functional parts using molding technology
… machine process and 30% to 70% were used in hot press molding machine process. In order to understand the variation in electrical and mechanical properties, several tests were performed such as density, porosity, tensile, hardness and IV test. Experimental data shows that the strength of the …
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An approach of using polymer natural fiber composite for vibration and flammability control
… fabricated with injection molding and hydraulic hot press to prepare the test specimens. The effect of MAPP on morphology, mechanical properties, physical properties, vibration damping properties and flammability properties of CF or KF composites were then investigated by using FTIR, SEM, tensile …
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Profile extrusion of wood plastic cellular composites and formulation evaluation using compression molding
… a scanning electron microscope (SEM). A new compression molding system was developed to help in quick evaluation of different material formulations. This system forces the materials to flow in one direction to achieve higher net alignment of fibres during sample preparation, which is the case …
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Vexatious Bodies in Modern Ireland
… While periodic outbursts of the vexatious pressurised official structures, the hegemonic expansion and contraction of official discourses returned it to a space beyond the parameters of dominant discourses, illustrated through examples involving infanticide and the tubercular body. The …
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The effect of cooling rate on toughness and crystallinity in poly(ether ketone ketone) (PEKK)/G30-500 composites
… All six panels were initially processed using a hot press equipped with controlled cooling. Four of the panels were used to investigate the effect of cooling rate on crystallinity. A fifth panel was used to investigate the effect of annealing the composite after completion of the standard …
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The characterization of mechanical behaviour on kenaf fibre / polypropylene composites
… fabricated via injection moulding and hydraulic hot press using kenaf fibre (KF) as filler and polypropylene (PP) as the matrix. A tensile test was carried out to determine the tensile stress of the material. The result revealed treated specimen possesses high tensile stress at 5 wt.% sodium …
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Lamination of Inverted Organic Photovoltaics and Associated Physical Properties
… is the result of a series of studies involving hot press lamination of inverted organic photovoltaics. It first gives background and develops a lamination process for fabrication. Then, the process is used to answer fundamental questions about organic photovoltaics and to fabricate previously …
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Thermoelectric device characterization and solar thermoelectric system modeling
… is sintered directly to the TE powder during press. Compatible electrode materials were identified and evaluated based on thermal stress, parasitic electrical/thermal resistance, chemical stability and ease of prototype fabrication. The final electrodes solutions were Co2 Si with the P-type …
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Microwave ring resonator based on thermoplastic substrate for chicken breast meat quality identification application
… started by preparing the PLA substrate using a hot press machine, and the PLA substrate’s dielectric properties were identified using the open-ended coaxial probe method. Then, the CBM’s dielectric properties were extracted from the open-ended coaxial probe method, where these values were …
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Laser Activated Bonding of Wood
… on laser modified wood was conducted using photo acoustic Fourier transform infrared spectroscopy (PA-FTIR) and X-Ray photoelectron spectroscopy (XPS). Light microscopy and scanning electron microscopy were utilized for surface topology analysis.Differential scanning calorimetry (DSC) …
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An experimental/analytical investigation of combined shear/end loaded compression strength testing of unidirectional composites
… Research Institute (IITRI) composite compression test method is probably the most widely accepted as producing accurate results. Difficulties associated with the application of this method, however, have fueled continued research into alternate methods. In this study, the Wyoming …
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