This Heidelberg TD 52-4-4-FI M is a used folding machine, sometimes referred to as a paper folder or sheet folder, dating from 2001 and currently located in Germany. Folding machines of this type are used in commercial and industrial print finishing to automatically fold printed sheets into a wide range of configurations, and Heidelberg is one of the most widely recognised names in the printing and print finishing industry, manufacturing equipment that serves commercial printers, packaging producers, and bookbinders worldwide.
The machine is based on the Stahlfolder TD 52-4-Fi platform and is equipped with an SA 66 MP.D mobile scale press delivery unit. It accepts a maximum sheet format of 52 × 84 cm and is fed by an Fi 52 flat pile feeder fitted with a tremat and side blowers for reliable sheet separation and transport.
The first folding unit comprises four motorised, adjustable rulers and pockets with a working width of 52 cm, along with a downstream cutter. Tri-Creaser creasing tools are also fitted to this unit, allowing crease lines to be applied inline to help prevent cracking on folded stock. The second folding unit likewise features four motorised, adjustable rulers and pockets at 52 cm, with its own downstream cutter block. In addition, there is a pneumatic, motor-driven adjustable gatefold pocket controlled by an ACC2.4 control unit, extending the range of fold configurations the machine can produce.
The delivery is handled by the SA 66 MP.D mobile scale press unit, which includes a marking device. A DV pump is installed within a noise enclosure. All buckle plate adjustments are motorised, facilitating repeatable and efficient job changeovers.
Notably, a full refurbishment of the folding rollers, bearings, and lubrication presses was carried out in August 2014, providing a documented point of mechanical renewal in the machine's service history.
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