PET Mold

The cavity surfaces of a PET preform mold are polished to a mirror finish using diamond compound, achieving an Ra below 0.04 µm. This ultra-smooth surface ensures that the preform emerges with zero drag lines or haze, which is fundamental for water bottles where consumers demand glass-like transparency. The finish is then protected with Teflon-nickel plating for easy mold release.

The gate diameter in a PET preform mold is calculated based on the shot weight and flow index of your specific PET resin. By keeping the shear rate below 24,000 s⁻¹, we prevent molecular degradation and acetaldehyde (AA) formation. This is crucial for CSD preforms where taste neutrality is paramount. The PET preform mold also features a heated gate tip that maintains a molten core without excessive skin heating.

A PET preform mold employs the water-cooled platen. This reduces heat loss by 40%, lowering the power consumption of the hot runner and maintaining a more stable melt temperature. The energy savings over a year of continuous operation are substantial, directly improving your bottom line.

Every PET preform mold comes with a full dimensional inspection report and a comprehensive startup guide. We provide on-site commissioning support to dial in the exact injection parameters, ensuring that from the first shot, your PET preform mold produces saleable preforms at the targeted cycle time.