DKM PET Preform Machine: Fast Cycles, 14-Day Delivery

For brands and converters searching for a DKM PET preform machine, the core question is usually the same: can a single supplier deliver injection machines, molds, and automation that work together from day one, with cycle times and delivery schedules that match real production demands? DKM Machinery, working alongside its sister company SINO MOULD, has built its PET preform business around exactly that question, combining dedicated machine platforms, high-cavity molds, and matched robotics into production lines that are commissioned and tested before they ever leave the factory.

Overview of DKM PET Preform Machines

DKM offers two complementary machine lines for PET preform molding. The PET Series Plastic Injection Molding Machine is a hydraulic toggle platform ranging from 250 to 650 tons, built with a PET-dedicated barrel and injection design that supports consistent high-cavity preform production. These machines are matched to 48, 72, 96, and 144-cavity preform lines, giving producers flexibility to scale output without switching equipment families. Because PET preform demand can be time-sensitive, DKM maintains safety stock for 350T, 450T, 550T, and 650T models so that standard configurations can move into production without long equipment lead times.

Alongside the PET Series sits the DKM-PET III Preform-Dedicated Injection Molding Machine, offered as DKM-350 PET III, DKM-450 PET III, DKM-550 PET III, and DKM-650 PET III. These machines use a standard electric accumulator for synchronized plasticizing combined with post-mold cooling technology, which compresses molding cycles, while nano far-infrared heating rings are applied to reduce production energy consumption. An optimized machine frame structure supports injection repeat accuracy of ≤0.5‰, a figure that matters directly for multi-cavity consistency across dozens or even over a hundred cavities running simultaneously.

Matching Machines to Cavity Counts

Each DKM-PET III model is paired to a specific cavity range: the DKM-350 PET III runs with 48-cavity lines, the DKM-450 PET III with 72-cavity lines, the DKM-550 PET III with 96, 144, and 168-cavity molds, and the DKM-650 PET III with 144-cavity production lines. This pairing approach means the machine’s clamping force, melting capacity, and injection system are already matched to the mold before a project begins, reducing the guesswork that often accompanies PET preform equipment selection.

Performance data from DKM’s own production lines illustrates how these pairings perform in practice. A 144-cavity preform mold running on a DKM-650 PET III machine achieves a 12.8-second cycle time while producing an 11g preform with a 29mm neck. A 168-cavity mold on the DKM-550 PET III, producing an 11g preform with a BPF 26/21 neck, runs at an 11-second cycle. On the 72-cavity standard line with the PET 450 machine, a 12g, 28mm preform is produced at a 12-second cycle, while the 48-cavity standard line with the PET 350 machine produces the same 12g, 28mm preform at a 16-second cycle.

Complete PET Preform Production Lines

Rather than offering machines in isolation, DKM packages its PET Preform Production Line as an integrated system combining the preform mold, the DKM-PET III injection molding machine, and a take-out robot. Three standard configurations are available: Standard 1 pairs the PET 650 machine with 144 cavities and a take-out robot for an 11g, 29mm preform at a 12.8-second cycle; Standard 2 pairs the PET 450 machine with 72 cavities and a dual-station external cooling robot for a 12g, 28mm preform at a 12-second cycle; and Standard 3 pairs the PET 350 machine with 48 cavities and a three-station external cooling robot for a 12g, 28mm preform at a 16-second cycle.

For producers working under tight launch timelines, DKM delivers 48/72-cavity standard production lines with standard 28/38mm neck finishes within 14 days from order confirmation to qualified shipment. Custom, non-standard preform molds and lines, including special neck finishes or mixed-cavity configurations, are delivered in 5 to 7 weeks. Every line undergoes pre-factory acceptance testing under simulated production conditions before shipment, and a secured supply chain with strategic inventory of critical components supports this compressed delivery schedule.

Automation: Out-Mold Cooling and Pick Robots

Preform weight affects how cooling is handled, and DKM addresses this directly through its Out-Mold Cooling & Pick Robot systems. Preforms under 16g are cooled directly on the robot gripper during part removal, while heavier preforms over 16g are combined with multi-station cooling units to avoid extending mold cycle time. Dual-station and three-station external cooling robots are matched specifically to the 72-cavity and 48-cavity line configurations, while a take-out robot integrates with the 144-cavity configuration.

Mold Precision from SINO MOULD

The machine side of a PET preform line is only half the equation; mold quality determines whether high-cavity output stays consistent over time. SINO MOULD and its subsidiary SINO-PK manufacture PET Bottle Preform Molds ranging from 8 to 168 cavities. Key mold components use Swedish S136 steel at HRC45-48 hardness, with a DIN1.2311 mold base, and tolerances are held to 0.01mm for uniform wall thickness and concentricity, with ±0.005mm precision capability available. Standard neck finishes include PCO 1810 and PCO 1881 along with 28mm necks for preform weights typically between 12g and 30g. Standard 48/72-cavity molds are delivered in 1 to 2 weeks, and a 3-year warranty with free spare parts during the warranty period backs every mold. SINO MOULD brings over 20 years of multi-cavity preform mold manufacturing expertise to this work, and has delivered more than 200 sets of standard PET preform molds worldwide, with an intelligent standardized production workshop becoming operational in October 2025.

Proven in Global Operations

These capabilities have been validated in live production environments. Two 144-cavity PET preform production lines are currently running under normal production conditions for a large-scale water and beverage packaging producer, one in Iraq and one in Iran, with customer acceptance test reports confirming satisfactory performance and payment settled in full on both projects. Separately, a 72-cavity production line with an out-mold cooling system has been documented producing a 13.5g, 28mm neck preform at a 12-second cycle for a producer requiring fast delivery, and standard 48 and 72-cavity preform mold orders have moved from order to shipment within 2 weeks.

Conclusion

For companies evaluating a DKM PET preform machine, the differentiated value lies in how closely the machine, mold, and automation are matched before shipment: cavity-specific machine pairings, documented cycle times down to 11 seconds, 14-day standard line delivery, and mold tolerances held to ±0.005mm. Backed by SINO MOULD’s mold engineering heritage and DKM’s dedicated PET III machine platform, the combination gives water and beverage packaging producers a preform production system that is tested as a complete line rather than assembled from disconnected parts.