Title of Thesis: Computer Aided Design of Side Actions for Injection Molding of Complex Parts Ashis Gopal Banerjee, Master of Science, 2006 Thesis directed by: Associate Professor Satyandra K. Gupta Department of Mechanical Engineering Often complex molded parts include undercuts, patches on the part boundaries that are not accessible along the main mold opening directions. Undercuts are molded...

Polymeric microneedles fabricated by microinjection molding techniques have been demonstrated using Topas COC as the molding plastic material. Open-channel microneedles with cross-sectional area of 100 lm · 100 lm were designed and fabricated on top of a shank of 4.7 mm in length, 0.6 mm in width, and 0.5 mm in depth. The tip of the microneedle has a round shape with a radius of 125 lm as limit...

High demand for plastic worldwide has resulted in increasing environmental pollution. To make the manufacturing process more environmentally friendly, recycling of waste must be considered. In view this a social enterprise called Me.reka Makerspace aims to use produce recycled products using injection molding. However, molding is complex process. past experienced numerous failures resulting def...

injection molding is one of the most important and common plastic formation methods. combination of modeling tools and optimization algorithms can be used in order to determine optimum process conditions for the injection molding of a special part. because of the complication of the injection molding process and multiplicity of parameters and their interactive effects on one another, analytical...

This paper presents measurements of acoustic emission (AE) signals during the injection molding of polypropylene with new and damaged mold. The damaged injection mold has cracks induced by laser surface heat treatment. Standard test specimens were injection molded, commonly used for examining the shrinkage behavior of various thermoplastic materials. The measured AE burst signals during injecti...

The electrically conductive polymers currently used cannot be industrially processed like plastics. Here, we reported a strategy of producing polymer composition with tin-gallium semi-liquid alloy for plastic molding to produce parts metallic conductivity (>106 S m−1). Molecular modeling and rheological experiments demonstrated that the key successful processing was viscosity matching between m...

background and aims. the aim of this study was to compare flexural strength of specimens processed by conventional and injection-molding techniques. materials and methods. conventional pressure-packed pmma was used for conventional pressure-packed and injection-molded pmma was used for injection-molding techniques. after processing, 15 specimens were stored in distilled water at room temperatur...

During the recent years powder processing technologies have gained much attention due to the less energy consumption and recyclable powders. Manufacturing of complicated parts by the conventional powder metallurgy (PM) method is hard due to the uniaxial pressure, which leads to the low design flexibility. In order to prevail these constraints, powder injection molding (PIM) process, which inclu...