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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 3, 2003
Accepted December 30, 2003

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Flow Direction When Fan Shaped Geometry is Applied in Gas-Assisted Injection Molding: 2. Development of Flow Model and its Predictions

Kwang-Hee Lim^† Soo Hyeun Hong

Department of Chemical Engineering, Daegu University, Kyungsan, Kyungbook 712-714, Korea

khlim@daegu.ac.kr

Korean Journal of Chemical Engineering, January 2004, 21(1), 59-68(10), 10.1007/BF02705381

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Abstract

In part 2 of the paper simplified unsteady-mass (and momentum-) balance equations of melt polymer resin in the cavities of GAIM were proposed, as a time-dependent rule of thumb, to constitute a novel flow model in GAIM under the configuration of two fan-shaped geometries connected with a gas nozzle. Upon performing a simulation on them with commercial software (MOLDFLOW), we compared the time evolution of simulated gas penetration lengths with the those of unsteady trajectory on the gas flow in GAIM by the suggested novel flow model in the fan-shaped cavities in order to check the precision of model-predicted gas penetration lengths as well as the consistency of its predicted direction. The results by the suggested novel flow model were satisfactory to fit the trajectory simulated with commercial software (MOLDFLOW).

Keywords

Gas-Assisted Injection Molding Rule of Thumb Preferred Direction of Gas Novel Flow Model Trajectory of Gas Flow Gas Penetration

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