No leakage of liquid after capping PET
bottle is the basic quality expectation of customer. The cap leakage
attributes to deformation of bottle neck during blowing. The root cause
is the preform neck is not guard around 360 degree while preforms
getting heated in IR oven. Therefore the temperature of neck portion
rises and around 5% rejection are noticed due to this defect.
The preform’s, while heated in IR oven,
individually neck portion is guarded around 360 degree. Chilled water is
circulated around neck. This system ensures the 100% defect free bottle
Significance of this system: It
is necessity to use the lowest possible weight preform for blowing
bottle. So the usages of smaller, thin & light weight neck is
necessary hence the neck cooling system plays a major role in bottle
weight reduction drive.