Abstract: A hot runner system is an assembly of heated components used in plastic injection molds that inject molten plastic into the cavities of the mold. By contrast, a cold runner is simply a channel formed between the two halves of the mold, for the purpose of carrying plastic from the injection molding machine nozzle to the cavities. Each time the mold opens to eject the newly formed plastic parts; the material in the runner is ejected as well, resulting in waste. A hot runner system usually includes a heated manifold and a number of heated nozzles. The main task of the manifold is to distribute the plastic entering the mold to the various nozzles which then meter it precisely to the injection points in the cavities. Hot runner technology is continuing to experience a phase of intensive development brought about by the increasing demands of the plastics processing industry. This industry is faced with a need to meet the following requirements. In this thesis, the effect of material, pressure, temperature on hot runner nozzle assembly is investigated by ensuring proper nozzle design. Hot runner nozzle design considerations are calculated theoretically and Modelled in 3D. The 3D Model is then tested for deformation & stresses using Finite Element Analysis. Furthermore, DFMEA is done to check for failures in design of hot runner nozzle. A complete study on pin point gate type hot runner nozzle is done to reduce the cost, leakage due to wear between parts and to determine the stress analysis due to injection pressure.
Keywords: Hot Runner Nozzle, Hot runner technology, Material degradation, Temperature control, Flow imbalance.
Title: Design and Analysis of Hot Runner Nozzle Using Fem
Author: P.Sanjay Rao, D.V. Subba Rao
International Journal of Mechanical and Industrial Technology
ISSN 2348-7593 (Online)
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