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Article: Cooling inside the parison shrinks cycles, expands output. (blow molding operations)
- Article from:
- Plastics Technology
- Article date:
- April 1, 1998
- Author:
CopyrightCOPYRIGHT 1998 Gardner Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Most blow molding operations leave the task of cooling to the mold. However, a relatively new method of cooling, whereby heat transfer occurs inside the formed parison as well as on the outside, is showing big benefits in reduced cycle times and higher production rates.
Developed by the Austrian parent of Fasti USA Inc., Elgin, Ill., the Compressed Air Cooling (CAC) system uses the blowing operation to cool the part internally through a continuous exchange of chilled and heated air. Combined with inflating the parison against the chilled mold, this creates "two-sided cooling" that enhances the heat-transfer rate throughout the part, says Fasti president Rainer Farrag. ...