Choose the 32 Cavity Hot Runner PCO Cap Mould: Speed, Precision, and Zero-Waste Closures

When beverage producers need to close millions of bottles every week, they turn to the 32 Cavity Hot Runner PCO Cap Mould. This precision tool has become the workhorse of high-volume bottling lines because it delivers 32 well formed PCO caps in every cycle while eliminating scrap runners.

impressions of the 32 Cavity Hot Runner PCO Cap Mould begin with its compact layout.  Despite housing thirty-two separate cavities, the mould base is only marginally larger than traditional 24-cavity tools.  The secret lies in the hot runner manifold that snakes between the cavities like a heated subway network.  Molten PE or PP flows through this manifold at precisely 220 °C, reaching each gate at identical pressure and temperature.  The result is 32 identical caps every 2.5–3.5 seconds, depending on the injection machine size.

The hot runner system itself is the heart of the 32 Cavity Hot Runner PCO Cap Mould. Unlike cold-runner equivalents, there are no solidified sprues to clip away, so material waste drops to virtually zero.  Valve-gated nozzles open and close within milliseconds, leaving only a pinpoint vestige on the top of each cap.  Because the melt stays molten, colour or grade changes can be executed in minutes rather than hours, saving valuable downtime on busy lines.

Tool steel selection for the 32 Cavity Hot Runner PCO Cap Mould is driven by longevity and thermal conductivity.  Core and cavity inserts are commonly machined from pre-hardened 718H or S136 stainless steel, polished to a mirror finish to resist carbonated beverage stress cracking.  The mould base is often produced from P20, while the hot runner manifold uses H13 to withstand continuous exposure to 230 °C.  With these alloys, the 32 Cavity Hot Runner PCO Cap Mould routinely exceeds three million shots before refurbishment is required.

From a design standpoint, the 32 Cavity Hot Runner PCO Cap Mould is engineered with balanced runner lengths.  Each cavity sits the same distance from the injection point, ensuring uniform filling.  Venting slots are micro-milled to evacuate trapped air within 0.02 seconds, eliminating short shots and burn marks.  Cooling circuits are drilled conformally around every cavity so that the caps drop below 60 °C before ejection, preventing deformation during stacking.

Cycle-time optimisation is another strength of the 32 Cavity Hot Runner PCO Cap Mould.  Because the melt channel remains hot, the screw can begin plasticising the next shot immediately after injection.  In contrast, cold-runner tools must wait for the sprue to solidify before recovery starts.  On a high-speed 350 t machine, the 32 Cavity Hot Runner PCO Cap Mould routinely achieves sub-3-second cycles, translating to roughly 38 000 caps per hour.  Over a 20-hour day this equates to three-quarters of a million closures—enough to supply a mid-size bottling plant.

Maintenance of the 32 Cavity Hot Runner PCO Cap Mould is surprisingly straightforward.  The manifold is heated by replaceable heater bands whose resistance can be checked with a multimeter.  Nozzles feature replaceable tips and valve pins that can be swapped in minutes.  A quick-release system allows the entire hot half to be lifted off in one piece, giving access to the cavity inserts for polishing or vent cleaning.  many converters schedule a brief preventive inspection every 250 000 shots, keeping the 32 Cavity Hot Runner PCO Cap Mould in peak condition.

Quality consistency is the calling card of the 32 Cavity Hot Runner PCO Cap Mould.  Cap weight variation is held within ±0.05 g, ensuring reliable tamper-evident band performance.  Thread pitch accuracy meets the PCO 1881 specification within 0.1 mm, guaranteeing good fit on PET bottle necks.  Optical sorting downstream finds fewer than 50 rejects per million when caps are produced on the 32 Cavity Hot Runner PCO Cap Mould, a figure that satisfies the strictest beverage giants.

Energy efficiency also favours the 32 Cavity Hot Runner PCO Cap Mould.  By eliminating the repeated heating and cooling of cold runners, power consumption per thousand caps drops by 8–12 %.  In a plant running ten such moulds around the clock, annual savings can exceed 120 MWh, reducing both carbon footprint and operating cost.  Additionally, the absence of runners shrinks material usage, which in turn lowers resin freight and storage expenses.