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Conformal Cooling Efficiencies in Stretch Blow Molding

from SPE Plastics Research Online

In the past decade, a number of key advances in stretch blow molding have improved the productivity and quality of water bottles, hot-fill bottles, carbonated beverage containers, and custom-shaped oval and non-round containers. These advances, such as reheating resins faster, opening and closing molds more quickly, and higher-energy, shorter-wavelength lamps, have almost doubled the blow-molding speed of polyethylene terephthalate (PET) containers. Throughputs topping 2200 bottles per cavity per hour have become common, and the mold contact time has reduced to around 1.2 seconds. more


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