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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 62 for “"Molding Process"”.
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Molding process development for fuel cell components
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Multivariable cycle-to-cycle of an injection molding process
… feedback control. In the manufacturing sector, processes consist of many input parameters and critical outputs. Multivariate CtC seeks to extend the findings of SISO CtC to more accurately reflect real world processes. Multiple input-Multiple output CtC feedback control is applied to an …
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Highly sensitive strain gauge based entirely on elastomers via molding process
… entirely on elastomers and partially about the molding process which is used to fabricate the strain gauge and pattern poly-dimethylsiloxane (PDMS). In this thesis, I demonstrate the design, fabrication and characterization of high gauge factor (GF), all-elastomer strain gauge systems, with …
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Investigation of defects on acoustic scattering in cloak by molding process
For this paper, molding- and casting-based microfabrication of metal microstructures was developed in order to replicate the acoustic cloak. The metal was cast into a stretchable PDMS mold, which was cast from micromachined aluminum cloak. For the PDMS mold, the mold release agent, trichlorosilane …
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Verification of a three-dimensional resin transfer molding process simulation model
… panels were fabricated by the Resin Transfer Molding process. Tests were completed utilizing both perimeter injection and center-port injection as resin inlet boundary conditions. The mold was instrumented with FDEMS sensors, pressure transducers, and thermocouples to monitor the process …
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Effect of vacuum level on the vacuum-assisted resin transfer molding process
Liquid composite molding (LCM) processes have become increasingly popular during the past five decades for the production of complex composite parts. Resin transfer molding (RTM) and structural reaction injection molding (SRIM) are the most widely used LCM processes. These two processes have the …
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Verification of a two-dimensional infiltration model for the resin transfer molding process
… at the mold inlet associated with the RTM process. Important input data for the model are the compaction and permeability behavior of the preform along with the kinetic and rheological behavior of the resin. The compaction behavior for several textile preforms was determined by experimental …
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Characterization of the Vacuum Assisted Resin Transfer Molding Process for Fabrication of Aerospace Composites
… (TCAT) efforts were focused on developing novel processing methods to fabricate tailored composite airframe structure. The Vacuum Assisted Resin Transfer Molding (VARTM) processing technique offers a safer, more affordable alternative to manufacture large scale composite fuselages and wing …
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Effect of various process variables on the mechanical properties of laminates produced through resin transfer molding process
The increasing interest in the Resin Transfer Molding Process (RTM) evolved from its potential for reducing manufacturing costs, while increasing the capability of manufacturing complex parts. This manufacturing process like many other processes involves a large number of variables, consisting of …
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Evaluation of hydroxyapatite (HA) from waste eggshell strengthened with ultra high molecular weight polyethylene (UHMWPE) by using injection molding process
… has been extracted under the calcination process and Tri-Calcium Phosphate (TCP) has been added to the eggshell solution. For the biomedical purposes, some standard should be met in order to implant certain material inside human body. Therefore, this research followed the standard of …
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A feasibility study of a surface modification method for polyolefin plastics formed by injection molding
… TPO and blends) articles formed by injection molding have been found to have many useful applications. Many costly and/or hazardous methods are employed to increase the surface energy to a level that promotes the ability of a coating or adhesive to make intimate contact and thereby bond to the …
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Flexible and transparent microcavity plasma devices: fabricated by polymer-based replica molding technique
… science and technology. A polymer-based replica molding process enables inexpensive and accurate production of microcavities of the devices. Best known as the sources of visible, ultraviolet (UV) and vacuum ultraviolet (VUV) radiation, microplasma devices fabricated by replica molding techniques …
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Label-Free Biosensor Based Upon Replica-Molded Vertically Emitting Distributed Feedback Laser
… upon plastic substrate in an inexpensive replica molding process render this sensor of value for applications in life science research, diagnostic testing, and environmental monitoring.
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Development of a Particle Flow Test for Rotational Molding
… qualify resin for use in production in the rotomolding process has been shown to have many flaws in both equipment and procedure. Research was done here to investigate a possible alternative that could eliminate some of these testing deficiencies. By reducing equipment and operator errors, the …
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Processing-Microstructure Models for Short- and Long-Fiber Thermoplastic Composites
… been applied to the mold cavity in injection molding simulation. Both a literature review and our experimental data strongly suggest that the majority of fiber length degradation occurs in the earlier stages of injection molding, in the screw nozzle, runners, and gate. A better understanding …
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Characterization of a molded plastic array of ten microplasma jet devices
… using inexpensive tools and materials. A simple molding process used for creating microplasma channels has been developed at the Laboratory for Optical Physics and Engineering. These devices have provided the opportunity to investigate characteristics and potential applications of arrays of …
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Mechanical and thermo-mechanical properties of particulate reinforced composites made from dry powder-power blends
A process for fabricating particulate reinforced composites from dry powder-powder blends was developed. The process was designed to exploit the nature of fine powder constituent materials, such that the energy input during the molding process could be reduced. Polymer and reinforcement materials …
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Numerical stimulation of stress-induced crystallization of injection molded semicrystalline thermoplastics
… morphology along their thickness directions. The processing conditions have a significant effect on the crystallinity distribution in the final parts. However, because of the lack of sound theoretical models for stress-induced crystallization kinetics in thermoplastics, simulations of the …
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