Abstract
Interchangeable Turning Sprue Bushing (ITSB) is a small insert at the centre of core side used to change runner directions for injecting 2 different products in a separate injection mold by shifting the melt filling to the cavities. The development of ITSB is significant in cutting down cost and time consumed during fabrication of a multi cavity family mold. In this study, the tensile and flexural test pieces were designed using CAD Solidwork. The test pieces analysis was performed using CAE Cadmould simulation in order to observe the melt flow of four multi cavities family mold incorporated without and with ITSB insert. The Cadmould simulation was used specifically to analyse the melt filling, temperature distribution and volume shrinkage of the test pieces. The simulation result demonstrated that ITSB is a useful insert that can be used to overcome problems encountered in the family mold system by balancing the melt filling, minimize temperature distribution and reduced the differential of volume shrinkage of the test piece manufactured. ITSB also reduced the frequent defects formed during production such as short molding, flashing and warpage.
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