The choice of material for PET preform mould is critical. High-quality steel alloys are typically used due to their durability, heat resistance, and precision in maintaining the desired shape and dimensions of the preform. The material must also be resistant to corrosion and wear to ensure a long service life and consistent product quality.

Precision is key in the design of PET preform moulds. Each mould is meticulously engineered to produce preforms with exacting specifications. The design must account for the shrinkage of PET during the blow molding process, ensuring that the final product meets the required dimensions and tolerances.

The number of cavities in a PET preform mould can vary depending on the production volume and the specific requirements of the manufacturer. Multi-cavity moulds are common for high-volume production, allowing for the simultaneous production of multiple preforms. This not only increases efficiency but also ensures uniformity across the batch.

An effective cooling system is integral to the PET preform mould. Rapid and uniform cooling of the preform is necessary to achieve the desired crystallinity and physical properties of the final product. The cooling system is designed to maintain a consistent temperature across the mould, preventing warping and ensuring the preform's structural integrity.