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Tim Miller is a product manager for heat transfer with Conair, Cranberry Township, Pa., a manufacturer of chillers and temperature control systems. For more information from Conair, call (412) 312-6000 or visit www.conairgroup.com.
One chiller manufacturer performed head-to-head comparisons under real-world conditions to determine the differences in efficiencies among fixed-speed, digital-scroll and variable-speed compressors.
For decades, plastics processors have had to select chillers based on their maximum cooling-capacity requirements. While this approach ensures plenty of chiller capacity, it is not always energy efficient.
If quality concerns arise when injection-molding plastic parts, consider the heat transfer equipment, including chillers and temperature control units, and avoid over- or under-cooling.
Mold temperature control is just one of many process elements that can affect the quality of a plastic injection-molded part and, even within that narrow slice of molding technology, there can be many variables.