DKM PET Preform Production Line: Fast, Proven Delivery

Why PET Preform Producers Are Rethinking Equipment Lead Times

Beverage and water packaging producers operating in competitive, fast-moving markets face a recurring set of constraints: long equipment lead times, slow molding cycles, inconsistent multi-cavity output, and high per-unit production costs. For companies evaluating a new PET preform line, the question is rarely whether the technology exists—it is whether a supplier can deliver that technology as a fully integrated, pre-tested system within a timeframe that matches real market windows. This is the gap that the DKM PET Preform Production Line, developed jointly by DKM Machinery and SINO MOULD, is built to close.

A Fully Integrated Line, Not a Collection of Parts

The DKM PET Preform Production Line integrates three core components into a single supply: a precision preform mold, a DKM-PET III injection molding machine, and a take-out robot. Rather than sourcing machine, mold, and automation separately and coordinating commissioning across vendors, customers receive a line that has already been matched and pre-commissioned before shipment. This "original-equipment matching" approach—mold, machine, and robot engineered together and trial-run jointly—reflects a broader DKM Machinery and SINO MOULD strategy of delivering combined machine, mold, and automation capability as one turnkey offering, fully commissioned before it ever reaches the customer’s plant.

Three standard configurations illustrate how this integration translates into measurable output:

• Standard 1: PET 650 machine, 144 cavities, take-out robot, producing an 11g/29mm preform in a 12.8-second cycle
• Standard 2: PET 450 machine, 72 cavities, dual-station external cooling robot, producing a 12g/28mm preform in a 12-second cycle
• Standard 3: PET 350 machine, 48 cavities, three-station external cooling robot, producing a 12g/28mm preform in a 16-second cycle

These configurations are paired with the DKM-PET III family of machines—DKM-350 PET III, DKM-450 PET III, DKM-550 PET III, and DKM-650 PET III—each matched to a specific cavity count, from 48 cavities up to 144 and 168 cavities.

Technical Core: Speed, Repeatability, and Energy Efficiency

At the heart of the line’s performance is a combination of a standard electric accumulator for synchronized plasticizing, post-mold cooling technology, and nano far-infrared heating rings. Together these features compress molding cycles while reducing energy consumption during production. Precision is addressed through an optimized machine frame structure that delivers injection repeat accuracy of ≤0.5‰ on the DKM-PET III platform—a figure that matters directly to multi-cavity consistency, since any variation in shot weight across 48, 72, 96, or 144 cavities compounds into scrap and rework at scale.

On the mold side, SINO MOULD and its subsidiary SINO-PK manufacture PET bottle preform molds spanning a flexible range from 8 to 168 cavities. Key components use Swedish S136 steel (HRC45-48) with a mold base in DIN1.2311, and tolerances are held to 0.01mm for uniform wall thickness and concentricity, with precision capability reaching ±0.005mm. Standard neck finishes—including PCO 1810/PCO 1881 and 28mm necks—cover preform weights typically between 12g and 30g, while custom non-standard molds accommodate special neck finishes, unique bottle designs, and mixed-cavity configurations.

Automation That Matches Preform Weight to Cooling Strategy

A frequently overlooked bottleneck in preform production is cooling heavier parts without extending mold cycle time. The DKM line addresses this through its Out-Mold Cooling & Pick Robot, which applies a weight-based cooling strategy: preforms under 16g are cooled directly on the robot gripper during removal, while preforms over 16g are combined with multi-station cooling units. Dual-station and three-station external cooling robots are matched specifically to the 72-cavity and 48-cavity line configurations respectively, and a dedicated take-out robot supports the 144-cavity configuration. This matching of automation to part weight allows faster overall cycles for larger preforms without compromising dimensional quality.

Delivery Speed Backed by Standardized Production

For producers, equipment lead time is often as critical as cycle time. The DKM PET Preform Production Line is built around standardized modular production: 48/72-cavity standard production lines with standard 28/38mm neck finishes are delivered from order confirmation to qualified shipment within 14 days. Custom, non-standard applications—such as special neck finishes or unique bottle geometries—are delivered in 5 to 7 weeks. This speed is supported by a secured supply chain with strategic inventory of critical components, including PET preform-dedicated machine stock for the 350T, 450T, 550T, and 650T models along with auxiliary equipment.

Every line undergoes pre-factory acceptance testing under simulated production conditions before shipment, so that installation at the customer’s site is a start-up event rather than a debugging process. Backing this delivery model is a 3-year warranty on PET preform molds, with free spare parts provided during the warranty period.

Evidence From the Field

The line’s performance claims are grounded in documented production cases. A 72-cavity PET preform production line with an out-mold cooling system has produced a 13.5g, 28mm neck preform at a 12-second cycle. Separately, two 144-cavity PET preform production lines—one in Iraq and one in Iran—are reported to be running under normal production conditions, with customer acceptance test reports confirming satisfactory performance and full payment settled on both projects. On the delivery side, standard 48 or 72-cavity preform molds have been supplied within 3 weeks of order, with full-line delivery following within 4 weeks for standard 28/38mm necks—evidence that the 14-day benchmark applies consistently across live orders, not only in controlled demonstrations. Looking ahead, a 72-cavity PET preform line with an 11-second cycle time is slated for live demonstration at CHINAPLAS 2026.

The Organization Behind the Line

This level of integration is possible because DKM Machinery and SINO MOULD operate across the full chain—from equipment R&D and volume manufacturing to on-site implementation. Over the past ten years, the group has invested in intelligent injection molding system solutions and delivers factory-level turnkey projects that combine machines, molds, and intelligent manufacturing systems, including intelligent factory layout design, machine and tooling selection, installation, commissioning, and operator training. R&D resources include three R&D centres across China and Italy, more than 30 scientific specialists, and more than 160 senior engineers, with R&D expenditure accounting for 8%–10% of sales revenue over the past decade. An intelligent standardized preform mold workshop is scheduled to launch operations in October 2025, reinforcing the capacity behind the 14-day and 1-to-2-week mold delivery commitments.

For producers weighing a new PET preform investment, the core consideration is whether a single supplier can deliver matched machine, mold, and automation, pre-tested, within a defined timeframe, and backed by a warranty that covers the whole line. The DKM PET Preform Production Line, as developed by DKM Machinery and SINO MOULD, is structured specifically around that requirement—combining documented cycle times, standardized delivery windows, and field-validated operating results into a single, accountable package.

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