RK PTR-320 High-Speed Rotary Die Cutting Machine With Auto Turret Rewinder

The RK PTR-320 is a roll to roll rotary die cutting and slitting machine with turret rewinding. Die cutting is a precise, repeatable way of cutting shapes with a shaped blade, and in the rotary form that blade is on a cylinder – a flexible die on a magnetic cylinder or a solid engraved die – that turns against an anvil. Because the web never stops, rotary die cutting is well suited to long runs of labels, stickers and packaging components.

RK's single rotary die cutting unit carries the die and the anvil in one unit, so the operator can set cutting depth evenly across the 320 mm web. After cutting, the waste matrix is stripped and rewound online, the web is slit into lanes, and each lane is wound on the turret rewinder on 1", 1.5" or 3" air shafts with automatic speed synchronising.

Single Rotary Die Cutting Unit

The single rotary die cutting unit holds the rotary die and anvil in stable alignment, which gives an even cut across the full width and makes die changes straightforward for the operator.

120 m/min Machine Speed

The PTR-320 runs at up to 120 metres per minute, which is a significant step up from stroke-based flatbed die cutting for long-run label work.

Automatic Turret Rewinding

A turret-type rewinding unit indexes automatically by stepper motor when the label or meter count is reached. Fresh cores rotate into position, and the operator unloads finished rolls while the machine continues.

1", 1.5" and 3" Rewinding Air Shafts

Two air shafts of each size are supplied with automatic speed synchronising, so roll build stays even across every lane and core change is quick.

Online Slitting With Air Blower

An online slitting unit divides the die-cut web into lanes, and an air blower carries the waste trim away so it cannot wind into the finished rolls.

Ultrasonic Electronic Web Guide

The web guide on the unwinding side uses an ultrasonic sensor, which keeps clear, thin and reflective materials tracking straight into the die and the slitting knives.

PLC-Based Label and Meter Count With Auto Stop

The operator sets a label count or roll length on the touch HMI. The PLC stops the machine or indexes the turret at that point, so every roll leaves with the same count.

Individual VFD Motors for Unwind and Rewind

A 2 HP unwinding motor and a 1 HP rewinding motor, each single phase with its own VFD, control tension independently at both ends of the machine.

The printed or plain roll, up to Ø600 mm, is loaded on the 3" air shaft of the unwinding unit. The 2 HP unwinding motor with VFD pays out the web under controlled tension, and the ultrasonic web guide corrects any sideways drift before the material reaches the die. In the single rotary die cutting unit, the web passes between the rotary die and the anvil roller; the die cuts the label outline through the face stock while the liner stays whole. The waste matrix is peeled away and wound continuously on the online waste rewinding unit.

The die-cut web then runs through the online slitting unit, where rotary knives divide it into the lanes required and the air blower removes the edge trim. Each lane winds on the turret rewinder on the selected core size. The PLC counts labels or metres; when the target is reached it indexes the turret by stepper motor, the next cores take over, and the operator removes the finished rolls. Forward or reverse winding is chosen by button, depending on how the customer wants the labels to unwind.

• Long-run product labels – FMCG, food, beverage and personal care labels where continuous rotary cutting pays off.
• Pharma labels in exact counts – rolls delivered with a fixed number of labels per roll, indexed automatically by the turret.
• Multi-lane label jobs – wide printed rolls slit into several narrow rolls in the same pass.
• Stickers and decals – kiss-cut sticker rolls for retail and promotional use.
• Packaging components – shaped labels and inserts cut from roll stock.

The PTR-320 is built for self-adhesive label stocks on a release liner up to 320 mm wide – chromo paper, thermal and thermal-transfer papers, and synthetic face materials such as PP and PET. The ultrasonic web guide helps clear and reflective webs track correctly. Cutting pressure, die type and slitting knives depend on the material, so share your stocks with RK before the machine is configured.

• RK PS-320 – Die Cutting With Up & Down Rewindingthe same rotary die cutting and slitting machine with an up and down rewinding unit instead of the turret.
• RK VANDANA-24 – Die Cutting With Sheet Cuttingrotary half cut plus an online rotary sheet cutting unit with conveyor.
• RK-TR-MPS-250 – Micro Die Cutting With Turret Rewinding (Manual)a compact 250 mm rotary die cutter with manual turret index.

RK Label Printing Machinery Pvt. Ltd. has manufactured label printing and converting machinery in Ahmedabad, Gujarat since 1995, with three manufacturing units and customers in 23+ countries. RK makes the rotary die cutters, the flexo presses that feed them and the slitters, inspection machines and accessories such as magnetic cylinders and flexible dies that go with them. One supplier for the press and the finishing line means widths, core sizes and roll formats already match, and installation, training and spares come from the team that built the machine.

• Run lengths: rotary cutting at 120 m/min suits long and medium runs; for very short jobs a flatbed die cutter may be simpler.
• Turret or up/down rewinding: choose the PTR-320 turret if most rolls are delivered in fixed counts and you want changeover without stopping. If you wind full rolls, the RK PS-320 with up and down rewinding is enough.
• Paper width: 320 mm maximum.
• Core sizes: 1", 1.5" and 3" air shafts are supplied, two of each.
• Unwind roll size: up to Ø600 mm on a 3" air shaft.
• Extra option: a mono-shaft rewinding unit is available if your jobs need it.
• Power: 4 HP single phase – check your supply.

The price of an RK PTR-320 depends on the configuration – rotary dies and magnetic cylinders, slitting knives, the optional mono-shaft rewinding unit and other options. RK quotes prices ex-works Ahmedabad with GST at 18% applicable. Engineer travel and stay for installation and training at your site are borne by the customer. Share your label sizes, materials, lane counts, core sizes and expected output, and RK will recommend a configuration and quote against it.