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.
Results
Showing 1 to 20 of 39 for “"Compression molding"”.
-
Compression Molding of Carbon Composite Prosthetic Foot Blade
… master project is to inspect the possibility of compression molding carbon composite foot blades. A proven method was selected from the literature, the method was chosen due to its usage for compression molding composites with curved surfaces where an elastic medium is used as an interface …
-
Recycling of crosslinked high density polyethylene through compression molding
… rigid products such as fuel tanks using a rotomolding process. Currently, defective and post-consumer parts are not recycled and sent to landfills. Hence, recycling of this material through compression molding is the objective of this study. Thermal analysis revealed that the extent of …
-
Profile extrusion of wood plastic cellular composites and formulation evaluation using compression molding
… by 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 …
-
Developing Chitosan-Morphed Graphene Composite Based Functional Materials by Compression Molding and Laser Lithography
… Composite (CMGC) using traditional sintering (compression molding) and study their properties. First, we produced CMGC using established methods that combine mechanical milling and sintering at temperatures ranging from 120°C to 180°C. Second, the integrity of the chitosan matrix was studied by …
-
Process Development for Compression Molding of Hybrid Continuous and Chopped Carbon Fiber Prepreg for Production of Functionally Graded Composite Structures
… ratio and directional load bearing capabilities. Compression molding of composite materials yields a superior surface finish and good dimensional stability between component lots with faster processing compared to traditional manufacturing methods. This experimental compression molding capability …
-
Pultrusion of commingled thermoplastic composite materials
… properties of the pultrusion process and the compression molding were done with the theoretical material properties. This involved a series of compression molding experiments of the commingled material followed by the pultrusion process itself. The results were then confirmed by a series of …
-
Electrospray emitters For diffusion vacuum pumps
… also comments on the applicability of powder compression molding for the fabrication of emitter arrays. Powder compression molding consists in manufacturing the emitter array out of a plastic - metallic powder feedstock. It consists on 4 steps: (1) Mixing of feedstock, (2) Compression molding, …
-
Optimal design and analysis for polymer extrusion and molding
… manufactured via the extrusion, injection molding, and compression molding processes. The design methodology employs polymer process modeling, design sensitivity analysis, and numerical optimization. It is applicable to systems with creeping flow of purely viscous non-Newtonian fluids …
-
Numerical Models for Compression Mold Filling
… element method to study the filling pattern of compression molding. The effects of charge size, temperature-dependent viscosity, mold temperature, and mold closing speed on the velocity and temperature distributions and flow front advancement are investigated.
-
Mechanically Processed Alumina Reinforced Ultra-high Molecular Weight Polyethylene (UHMWPE) Matrix Composites
… room temperature to produce composite powders. Compression molding was utilized to produce sheets out of the milled powders. A partial phase transformation from orthorhombic and amorphous phases to monoclinic phase was observed to occur for both the un-reinforced and reinforced UHMWPE in the …
-
A resorbable polymeric microreservoir device for controlled release drug delivery
… devices was developed, that consists of two compression-molding steps, followed by microinjection of the reservoir membranes from solution and subsequent drying of the membranes under vacuum and elevated temperature. The devices are then loaded with the drugs to be released and sealed at room …
-
Using a Sliding Plate Rheometer to Obtain Material Parameters for Simulating Long Fiber Orientation in Injection Molded Composites
… between stress and fiber orientation. Using a compression molding sample preparation procedure, the transient shear stress response was measured for glass and carbon fiber suspensions up to a number average fiber aspect ratio (length/diameter) of 100. Increases in concentration or fiber aspect …
-
Low temperature processing of baroplastic core-shell nanoparticles and block copolymers
… by ATRP and processed at reduced temperatures by compression molding. The resulting processed specimens were clear and well-defined solid objects. Structural characterization studies on the processed baroplastics showed that the mixing between components during processing is incomplete and …
-
Processing Behavior of Thermoplastics Reinforced with Melt Processable Glasses
… processed by techniques including injection molding, compression molding, and thermoforming. Thermoplastic resins consisting of polyphenylene sulfide (PPS), polyetherimide (PEI) and polyetheretherketone (PEEK) were combined with phosphate glasses having glass transition temperatures (Tg) that …
-
The cooling of a pultrusion process simulator
… apparatus was constructed similar to that of a compression molding device to represent the thermal process of the pultrusion machine. The simulation block utilized temperature variations and compaction pressure to create small samples that represented sections from a pultruded geometry. In this …
-
Piezoresistive UHMWPE WMCNT Sensors for Instrumented Total Knee Replacements
… the applied stress. A steel mold and a two-stage compression molding process were developed to instrument and hermetically seal the embedded sensors within the tibial insert. As the sensors were made from the same material as the UHMWPE tibial insert, the impact of the sensor instrumentation on …
-
Understanding the effect of nanofillers on the properties of polypropylene and glass fiber/polypropylene multiscale composites
… were produced by (i) melt compounding and compression molding and (ii) extrusion and injection molding. It was found that injection molding provides significantly greater stiffness and strength compared to compression molding for all types of PP nanocomposites. Several characterization …
-
Manufacturing of Poly(vinylidene fluoride) and Evaluation of its Mechanical Properties
… maintained their crystal structure during compression molding at 70°C.
-
Investigation on the Morphology of Charge-Transfer Complexes in Low Density Polyethylene
… selectively controlled via the concentration, compression-molding temperature, or cooling rate to form needle and highly branched dendritic micro-crystallites. Optical imaging was used visualize the microstructure of the CTC crystallites. Fourier-transform infrared spectroscopy (FTIR) was used …
-
High-Temperature Performance of Carbon Fiber Reinforced Cyanate Ester Composites Filled with Nano-Ceramics
… process. Hand layup followed by the compression molding is used to fabricate carbon fiber-reinforced cyanate ester nanocomposite. Scanning electron microscopy (SEM) is performed very effectively for microanalysis and failure analysis of the composites. Tension, compression, and short …
Page 1 of 2