PET preform molds typically employ multi-cavity designs, ranging from 24 to 96 cavities or even more. Under multi-cavity production conditions, the consistency of product weight, wall thickness, and bottle neck size directly affects the stability of downstream blow molding processes and the yield rate of finished products.

PET preforms and thin-wall packaging products impose exceptionally stringent requirements on dimensional accuracy, wall thickness uniformity, and optical transparency. Especially in ultra-high-cavity production scenarios with 96-cavity, 128-cavity, or even 144-cavity configurations, the consistency of each cavity's output serves as the benchmark for measuring a machine's core performance.

Although PET preforms are relatively small and lightweight, their production requires high standards for injection speed, plasticization uniformity, temperature control and repeatability.

The downstream industries including chemical, food, pharmaceutical and logistics keep expanding, which drives rising demand for high-strength and well-sealed plastic buckets.

In a bucket injection molding workshop, unplanned downtime is often the most vexing problem for managers. Abnormal sensor signals, a stuck solenoid valve in the oil circuit, an open circuit in a heating section — if these faults are not caught early, they often erupt suddenly during continuous production, triggering a chain of consequences such as material packing in the mold and delayed orders.