The Physics of Precision: How ±0.1mm Servo Stretching Dictates PET Wall Thickness
Why does wall thickness consistency matter? In high-speed PET production, a deviation of even 0.2mm can lead to structural failure or excessive material waste. At BANGE Machine, we solve this through Digital Stretch Calibration.
The Servo Advantage: Unlike pneumatic cylinders that rely on air pressure—which fluctuates with temperature and compressor load—BANGE’s Schneider-driven servo motors control the stretch rod with a positioning accuracy of ±0.1mm.
Technical Breakdown:
Programmable Velocity: We can program the stretch rod to move at different speeds during a single stroke. This "Variable Velocity Profile" allows the PET material to be distributed more heavily in the shoulder or base as required.
Vibration Dampening: Servo systems eliminate the "mechanical bounce" found in pneumatic stops, ensuring the preform is stretched centrally every time.
Result: Factories using BANGE technology report a 45% reduction in wall thickness variance, allowing for "Lightweighting" strategies that save thousands of dollars in resin costs annually.
