6 Cavity PET Jar Preform Mould: The Balanced-Cavitation Solution Driving Modern Packaging Efficiency

6 Cavity PET Jar Preform Mould has become the workhorse of modern packaging lines that need medium-volume output without the capital cost of ultra-high-cavity tools. Built for poly-ethylene terephthalate (PET) granulate, the 6 Cavity PET Jar Preform Mould is engineered to produce six identical jar preforms in one 25- to 32-second cycle, giving converters roughly 650–700 shots per hour and more than five million finished preforms per month when running on a 220-ton servo-hydraulic injection press. This balanced cavitation allows brand owners to meet regional demand quickly while keeping inventory low and change-over times short.

At the heart of every 6 Cavity PET Jar Preform Mould is a precision hot-runner system with individual needle-valve gates. Each gate is controlled by a separate temperature zone, eliminating weld lines and guaranteeing that the 95 g preform for a 110 mm jar neck, for example, leaves the cavity with a uniform wall thickness of 0.30 ± 0.02 mm . The melt channels are bored from good H-13 steel, vacuum-hardened to 48–52 HRC, while the cavities and cores are machined from corrosion-resistant S136 stainless steel polished to a mirror #600 finish. This combination lengthens the life of the 6 Cavity PET Jar Preform Mould to no less than three million shots before any major refurbishment is required .

Thermal consistency is critical, so designers integrate spiral cooling circuits only 8 mm from the preform surface. Chilled water at 8–12 °C circulates through beryllium-copper inserts, extracting heat fast enough to hold cycle-to-cycle weight variation within ±0.2 g . A balanced cooling layout also prevents the pearlescent haze that can plague slower systems, ensuring that every preform blown into a 500 ml or 1 L jar is crystal clear. The 6 Cavity PET Jar Preform Mould therefore delivers optical-grade clarity without secondary annealing.

Quick-change features reduce downtime. The entire 6 Cavity PET Jar Preform Mould is mounted on European-style quick clamps, and the hot-runner manifold swings out on hinges in less than ten minutes for color or material swaps. Thread splits use a self-locking conical interlock, so neck-ring replacement takes only fifteen minutes per cavity instead of the traditional hour. These ergonomic details make the 6 Cavity PET Jar Preform Mould popular with co-packers who may run three different jar sizes in a single shift.

Automation compatibility is built in. The stripper plate is drilled for robot fingers, allowing a side-entry take-out robot to lift six preforms simultaneously and place them on a cooling conveyor. A pneumatic tail-cut unit integrated into the 6 Cavity PET Jar Preform Mould trims the gate vestige flush, eliminating the need for secondary de-gating and reducing labor by one operator per line . The compact 550 × 550 mm footprint also fits many 220–280 ton injection presses without platen modifications.

Energy efficiency is another hallmark. By optimizing runner length and using low-shear valve gates, the 6 Cavity PET Jar Preform Mould reduces PET residence time and lowers melt temperature by 5–7 °C compared with older valve-gated systems. This translates into 8–10 % less energy per kilogram of PET processed, a saving that quickly repays the initial investment. In markets where electricity costs exceed USD 0.12 per kWh, the 6 Cavity PET Jar Preform Mould often pays for itself in under eighteen months.

The 6 Cavity PET Jar Preform Mould offers a good balance of output, quality, and cost for converters serving food, beverage, and personal-care markets. Its robust hot-runner design, quick-change architecture, and automation readiness make it a future-proof choice for any plant aiming to stay competitive in the rapidly growing PET jar segment.