5. Conclusion
The main reason of scrap in cold runner system of injection molding is the feeding system which consists of sprue, runner and gate system. Runner has different cross sections for different applications. In this study, new geometry of runner system with elliptical cross section in comparison with round cross section was successfully developed for injecting two circular plates with thickness 1mm. filling time, melt temperature; mold temperature; pressure holding time and pure cooling time are evaluated as process parameters.