境界要素法による射出成形金型の熱解析

概要

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A computer program has been developed to simulate mold cooling in computer-aided engineering for thermoplastic injection molding. The three-dimensional thermal conductive equation is solved by using the boundary element method combined with the finite difference method. A one-dimensional transient heat conductive equation, which represents the cooling behavior of the injected polymer melt, is solved by the finite difference method for estimating cycle-averaged heat flux from the polymer to the mold. Heat flux on the surfaces of the cavity and the runner, temperatures on surfaces of the mold, and heat convections between mold-coolant, mold-ambient air, mold-mold and mold-core are taken into consideration as boundary conditions in the mold cooling simulation. Calculated mold temperatures were compared with experimental results for a mold for a box-shaped molded part. There was a good agreement between them.
1991-08-25