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Introduction To Two-Stage Stretch Blow Molding TechnologyThis course is a
practical introduction to the technology of two-stage PET reheat-stretch blow
molding. It gives participants in-depth instructions on how to set up and run
the machine for optimal bottle quality. The
main principles behind reheating PET preforms and the workings inside the blow
mold will be explained in detail. We will use a computer program to simulate the
inflation of the preform in the blow mold. Topics include: -
Preform wall
temperatures, stretch ratios, and how the preform inflates into a bottle - Update: Strain-hardening with different axial stretch ratios -
Controlling bottle wall
thickness distribution -
Reheating PET preforms
with infrared: o
Radiation, convection,
conduction and the light absorption characteristics of PET -
Control of the infrared
heaters -
Temperature control in
the oven -
Timing of the blow
process o
stretch rods o
pre-blow and high
pressure blow air o
decompression Who should
attend? Operators, processors, and plant engineers that are new to two-stage reheat-stretch blow molding, or who want to refresh their knowledge and gain new insights. This is a beginner’s course: an advanced course will be offered shortly.
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