BLOW MOLDING: Temperature Probe for PET Preforms

Handheld probe measures internal preform temperature directly, ends guesswork.

Process setup and quality control on PET reheat stretch-blow molding lines can be enhanced with a new handheld temperature probe from Plastic Technologies, Inc. (PTI), Holland, Ohio. The PreTemp probe is designed to measure the interior temperature of preforms. This is said to be an important new capability because previous methods measure only the exterior temperature, leaving processors to make an educated guess about how much heat is driven through the preform wall.

The probe uses one-button actuation of an array of noncontact infrared sensors to provide an interior temperature profile, measuring up to 16 points simultaneously. The probe has a built-in display and comes with software to log and analyze data.