The effects of heat transfer parameters key to industrial processing have been identifiedvia polymer injection moulding process simulation. Moldflow finite element analysissoftware has been used to simulate injection moulding of components to investigate therelationship between injection moulding processing conditions and the effects ofmaterial properties on the moulding process. The effects of core and cavity side heattransfer coefficients, thermal conductivity and component thickness upon the injectionmoulding cycle time have been examined. Time to freeze for a moulding decreasedwith increasing polymer thermal conductivity, this effect becoming less pronouncedwith decreasing moulding thickness. Maximum injection pressure for a mouldingincreased with increasing polymer thermal conductivity with this effect becoming lesspronounced with increasing moulding thickness. For a component, time to freezedecreased with increasing average heat transfer coefficient, although an effective lowerlimit to time to freeze was reached when core and cavity heat transfer coefficientsvalues were set at 10,000 W/(m2.K) or above. These values for core and cavity heattransfer coefficients also set an effective upper limit for the maximum injection pressurefor a component. Setting both core and cavity heat transfer coefficient values at 500W/(m2.K) gave the lowest times to freeze and the lowest maximum injection pressuresfor all thicknesses. Setting the heat transfer coefficient values to 4,000 W/(m2.K) and6,000 W/(m2.K) for core and cavity or cavity and core sides, respectively, produced theshortest time to freeze and highest maximum injection pressures of all the cases wherethe heat transfer coefficients were set at different values. The study has helped toimprove understanding of the heat transfer taking place during injection moulding.