Straight cooling channels are the most common method of controlling part temperature in
injection molding process. However, straight cooling channels are not enough to manage
temperature uniformity of the parts. In this work, a numerical study is conducted to decrease
cycle time and cost of the injection molded parts by using conformal cooling channels. For this
purpose, the commercial injection molding simulation program Moldflow is used.
The governing physical equations for injection molding were derived and presented. The
assumptions of the model were checked for simple geometries by comparing analytical results
and numerical results of Moldflow. Then, the effect of conformal cooling channels is
investigated for injection molding of a half cylinder shell part. It was seen that conformal cooling
channels cools part faster and more uniform than straight cooling channels without corruption on
the surface appearance.
Finally, a real life case study was presented. For this purpose, a refrigerator shelf that is
manufactured by the Arç / elik Company was studied. The process was simulated using actual
process parameters and simulation results were compared with production results. Then, the
process was simulated using conformal cooling channels and compared with production results.
It is seen that the cycle time of the refrigerator shelf was decreased considerably while
preserving surface quality appearance.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12609186/index.pdf |
| Date | 01 December 2007 |
| Creators | Ozmen, Emin Mehmet |
| Contributors | Erdal, Merve |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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