Design and Fabrication of Single-Cavity Injection Mold Using Hot Runners and Direct Hot Tip Gates: -

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 compared to a cold runner is simply a pathway or channel formed between the two halves of the mold i.e core half and cavity half 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 a 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. The industry is facing is in need of meet the following requirements. The effect of material, pressure, the temperature of the hot runner nozzle assembly is investigated by ensuring proper manifold and nozzle design. In this the paper proper design of hot runner mold and Plastic flow analysis method is used to optimize the injection position and configure the process parameters rationally so that quality and higher production rate can be achieved as per the customers requirement