Simulation and Analysis of Cold Runner Mould for Defect Minimization

Abstract

Most of the thermoplastic resins were molded by using Injection molding with Cold Runner System. Cold runner system is widely used in many of the plastic industries due to its simplicity in design and less investment cost in tooling. It doesn’t require highly skilled manpower and gives moderate quality component. The product quality can be confirmed through simulation results for cold runner system. This paper covers the design and simulation of concealed box using mould flow software. The essential material properties for the application of concealed box are fire and heat resistant, insulator, high rigidity and dimensional stability. ABS (Acrylonitrile Butadiene Styrene) material offers most of these hence can be suited for electrical appliances widely. Simulation of the component with respect to various process parameters such as Injection pressure, mould temperature, shear stress, cycle time are discussed so as to minimise the mould defects such as sink marks, weld lines and air traps in moulded component. This paper elaborates suitability of cold runner system for ABS as a better substitute for such applications with better productivity.