Sinomould Preform Mold: PET Tooling From 8 to 168 Cavities

Understanding the Sinomould Preform Mold Portfolio

For companies producing PET bottle preforms for water and beverage packaging, the choice of mold supplier directly determines cycle time, dimensional consistency, and long-term tooling cost. SINO MOULD, operating alongside DKM Machinery under a joint technology framework covering injection molding machines, precision molds, robotics, and complete turnkey production lines, has built its PET Bottle Preform Mold line around one central goal: delivering multi-cavity consistency without sacrificing speed or precision. The mold range spans from 8 to 168 cavities and is manufactured both by SINO MOULD directly and through its subsidiary, SINO-PK.

This breadth matters because preform producers rarely fit into a single production profile. A smaller operation may need an 8-cavity or 48-cavity tool for flexible runs, while a high-volume bottling operation requires 96-, 144-, or 168-cavity molds capable of sustaining consistent output around the clock. SINO MOULD’s standardized manufacturing process—covering design, machining, testing, assembly, and inspection—is structured to support this entire cavity range without compromising the precision expected at the high end.

Engineering Precision Behind Every Cavity

Preform quality starts with material selection and machining tolerance. Key components in the Sinomould preform mold line are manufactured from Swedish S136 steel (HRC45-48), with mold bases built from DIN1.2311. This steel choice supports the demanding combination of hardness and wear resistance needed for high-cycle, high-pressure PET molding.

Dimensional control is equally central to the product’s value proposition. Tolerances are held to 0.01mm for uniform wall thickness and concentricity, with a precision capability reaching ±0.005mm. For PET preform producers, this level of control is what prevents uneven wall distribution, blow-molding defects, and bottle-to-bottle variation downstream. Standard neck finishes—including PCO 1810, PCO 1881, and 28mm neck configurations—are engineered for preform weights typically ranging from 12g to 30g, covering the majority of common beverage packaging formats.

Custom and Cold-Half Mold Options

Beyond standard configurations, SINO MOULD offers custom cold-half molds built on existing mold platforms, which reduces the investment customers would otherwise need to make for a fully new tool. For applications outside standard neck finishes, bottle designs, or mixed-cavity configurations, custom non-standard preform molds are available with a 5- to 7-week delivery window, giving producers with unique packaging requirements a defined path to production without relying on fully bespoke engineering timelines.

Speed to Market Without Sacrificing Consistency

One of the more distinctive aspects of the Sinomould preform mold program is delivery speed paired with volume manufacturing discipline. Standard 48- and 72-cavity molds are delivered in 1 to 2 weeks, and a single-week delivery program exists for 48-, 72-, and 96-cavity configurations, supported by standard manufacturing processes, safety stock, and an active assembly line. This delivery structure is reinforced by an intelligent standardized production workshop scheduled for operational launch in October 2025, which is intended to further support the consistency of this rapid-delivery model.

Over 200 sets of standard PET preform molds have been delivered worldwide under this program, reflecting a manufacturing approach built around repeatable, high-precision output rather than one-off custom engineering for every order.

Matched Machine-Mold-Robot Systems for Turnkey Output

A preform mold performs only as well as the system around it. SINO MOULD’s preform molds are engineered to work directly with the DKM-PET III Preform-Dedicated Injection Molding Machine series—including the DKM-350, DKM-450, DKM-550, and DKM-650 PET III models—and with out-mold cooling and pick robots for preforms both under and over 16g in weight. This combination is assembled into the broader PET Preform Production Line, which integrates preform mold, injection molding machine, and take-out robot into one system, pre-commissioned before shipment for immediate start-up at the customer’s facility.

Representative configurations illustrate how mold cavity count, machine tonnage, and robot type are matched together: a 144-cavity mold paired with the DKM-650 PET III machine and a take-out robot produces an 11g, 29mm neck preform at a 12.8-second cycle; a 72-cavity mold on the PET 450 machine with a dual-station external cooling robot produces a 12g, 28mm preform in 12 seconds; and a 48-cavity mold on the PET 350 machine with a three-station external cooling robot achieves a 16-second cycle for the same 12g, 28mm preform. A 168-cavity mold with a BPF 26/21 neck and 11g product weight runs an 11-second cycle on the DKM-550 PET III. A 26g preform mold has also achieved a 12-second cycle through recent design upgrades.

Quality Assurance Backed by Warranty Support

Tooling reliability over the long term is addressed through a 3-year warranty on PET preform molds, with spare parts provided free of charge during the warranty period. Every line is subjected to pre-factory acceptance testing under simulated production conditions before shipment, reducing the risk of on-site surprises once equipment reaches the customer’s facility.

This quality structure is reflected in field performance. Two 144-cavity PET preform production lines are currently operating in Iraq and Iran, both running under normal production conditions, with customer acceptance test reports confirming satisfactory performance and full payment settled on both projects. A separate 72-cavity PET preform line with an out-mold cooling system has also been documented in operation, producing 13.5g, 28mm neck preforms at a 12-second cycle.

Industry Applications and Global Reach

The Sinomould preform mold line is positioned specifically for water and carbonated beverage preform production and large-scale PET packaging operations. SINO MOULD’s broader mold-making background spans more than 20 years of multi-cavity preform mold manufacturing, built on a technology platform that integrates European R&D input through an Italy Technical Office established in 2018 and an Italy Technology Center established in 2023.

For producers evaluating preform tooling, the combination of defined delivery timelines, documented tolerance specifications, warranty-backed support, and verified multi-cavity field performance gives SINO MOULD’s preform mold program a clear, fact-based basis for consideration—whether the requirement is a standard 48-cavity tool delivered within weeks or a high-output 144- or 168-cavity system integrated into a full turnkey preform production line.