Hallo,
i have two cavities connected in Parallel which i would like to fill with Polymer (Rubber) one cavity get filled earlier than the other, the equation i used is simple mass flow equation which is m'=roh.V.A [Kg/s] to determine the second cavity Diameter which did not work and i think this is due to viscous effects of rubber and Shore hardness. can someone guide me to analytical calculation more deep of runner and gate system to fill two different volumes in same time by considering shear effects and shore hardness of rubber and other important parameters like Pressure and tempreture?
Thanks in Advance
The flow depends on the rate of flow in the gateway.there is no necessity of change in runner hole. on behalf of kindly specify the shape of your gate and is directly connected to your plastic mold model.
(Calculate mass flow rate with respect to your gate shape.)
Refer the book of
Injection Mould Design: A Design Manual for the Thermoplastics Industry
R. G. Pye.
Apply the rule of gating system and risering procedure like Caines method or naval research lab method.
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