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Simulation and experimental verification of two cavity balance in injection molding

: Myers, N.S.; Kramer, L.

Reardon, D. ; Metal Powder Industries Federation -MPIF-, Princeton/N.J.:
Advances in powder metallurgy & particulate materials 2019 : Proceedings of the 2019 International Conference on Powder Metallurgy & Particulate Materials, sponsored by the Metal Powder Industries Federation, June 23-26, 2019
Princeton: MPIF, 2019
ISBN: 978-1-943694-21-1
International Conference on Powder Metallurgy and Particulate Materials (PowderMet) <2019, Phoenix/Ariz.>
Fraunhofer IFAM ()

Injection molding of two cavities of different sizes leads to filling imbalance and possible defects, since the smaller cavity fills first, but is not packed until the larger cavity is filled. SigmaSoft PIM simulation was applied to alter the gate and runner geometry of two similar sized cavities in order to balance the fill rates of the 2 cavities. The optimized geometries were produced and tested, and the verification of the simulation is compared to the experimental results. The material used in simulation and experimental verification is a WC-10Co grade powder. The agreement between simulation and experimental results was good, though experimental optimization was still required.