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dc.contributor.authorPoungthong, P.en
dc.contributor.authorGiacomin, A. Jeffreyen
dc.contributor.authorSaengow, Chaimongkolen
dc.contributor.authorKolitawong, Chanyuten
dc.contributor.authorLiao, H.-C.en
dc.contributor.authorTseng, S.-C.en
dc.date.accessioned2019-04-03T15:24:26Z
dc.date.available2019-04-03T15:24:26Z
dc.date.issued2018-02
dc.identifier.urihttp://hdl.handle.net/1974/26082
dc.description.abstractInjection molding of thin slender parts is often complicated by core deflection. This deflection is caused by molten plastics race tracking through the slit between the core and the rigid cavity wall. The pressure of this liquid exerts a lateral force of the slender core, causing the core to bend, and this bending is governed by a nonlinear fifth order ordinary differential equation for the deflection that is not directly in the position along the core. Here we subject this differential equation to 6 sets of boundary conditions, corresponding to 6 commercial core constraints. For each such set of boundary conditions, we develop an explicit approximate analytical solution, including both a linear term, and a nonlinear term. By comparison with finite difference solutions, we find our new analytical solutions to be accurate. We then use these solutions to derive explicit analytical approximations for maximum deflections, and for the core position of these maximum deflections. Our experiments on the base-gated/free-tip boundary condition agree closely with our new explicit approximate analytical solution.en
dc.language.isoenen
dc.relation.ispartofseriesPolymers Research Group Technical Report Series;QU-CHEE-PRG-TR-2018-39
dc.subjectInjection moldingen
dc.subjectThin-wall injection moldingen
dc.subjectCore deflectionen
dc.subjectCore bendingen
dc.subjectRace trackingen
dc.subjectCore deflectabilityen
dc.titleNonlinear Core Deflection in Injection Moldingen
dc.typetechnical reporten


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