This study deals with the use of thermal isolation to improve packing problems associated with a thin to thick flow. Specially designed cavity inserts with insulating air gaps were used for this thermal isolation of the thin area. Stainless steel was also used as a cavity insert material to thermally isolate the thin area of an actual problem molding. The results show that these two techniques did isolate the thin area from the mold's cooling system and visibly improved the packing in the problem molding used in this study.
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