PET Preform Mold for Carbonated Soft Drink

The gate area in a PET preform mold for carbonated soft drink is programmed to produce a slightly thicker base wall. This additional material supports the high biaxial orientation needed to withstand internal CO₂ pressures exceeding 15 bar. Our mold ensures there is no abrupt step change in thickness, preventing stress concentration and base crack failures.

Carbonated soft drinks are sensitive to flavor changes. The PET preform mold for carbonated soft drink uses a gentle melt delivery path with large-diameter, well-radiused flow channels. This minimizes shear rate and keeps the melt temperature as low as possible while still filling the cavity, dramatically reducing acetaldehyde generation to below 3 ppm in the preform.

The PCO 1881 neck from a PET preform mold for carbonated soft drink must hold pressure for months. Our neck rings feature an optimized cooling channel layout that freezes the support ledge and threads within 1.5 seconds of injection. This rapid freeze produces a highly amorphous neck with no incipient crystallinity that could cause stress cracking under the carbonation pressure.

With a PET preform mold for carbonated soft drink, process drift is the enemy. We integrate precise thermal regulation with feedback from in-mold sensors, so the mold maintains the same heat profile shift after shift. This stability means that once qualified, the preforms will continue to pass burst tests and dimensional checks without constant operator adjustment.

A PET preform mold must deliver a preform with a homogeneous axial temperature profile for consistent stretch blow molding. Our cooling design maintains a controlled gradient from the gate to the neck, with no isolated cold spots. This homogeneity means that the subsequent reheating step in the blow molder requires less energy and yields more robust bottles.