Structural and Thermal Analysis on Hot Runner Nozzle by FEA
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 9
Abstract
Hot-runner systems can provide an array of benefits, including reduced material use, faster cycles, and overall better part quality. Hot runner system is an assembly of heated components used in plastic injection molds that inject molten plastic into the cavities of the mold. 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. In some hot-runner systems, it can be difficult to keep temperatures uniform in the nozzles and tips areas where evenly distributed heat is needed to prevent flowchannel hot spots. With many hot-runner systems, and with certain resins, you may need to lower the temperature of the material right at the gate to prevent drooling, stringing, or other part-quality problems. Sometimes, the cause is related to a lessthan- optimal match between standard heaters and the nozzles and other components of the system. Special heaters particularly flexible heaters that are designed specifically for compatibility with a given system will achieve better distribution of heat. On the heater head, a more heat-retaining material, such as TZM, will also help prevent heat dissipation. TZM is beneficial for the same reason in the nozzles and tips..A closer examination will more likely reveal that the molding machine isn’t set to your material manufacturer’s recommended temperatures, causing the resin to overheat. In addition to keeping your system at proper temperatures. Hot runner technology is continuing to experience a phase of intensive development brought by the increasing demands of the plastics processing industry .The 3D model is then tested for deformation & stresses using Finite Element Analysis. 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.
Authors and Affiliations
Perugu Lavanya, SK Noor Mohammed
Keywords
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