The stack type flexo printing machine is a versatile multi-color press built for paper packaging, paper bag, and corrugated liner applications. Its vertical station layout gives operators direct access to plate cylinders, ink trays, and doctor blade assemblies, which speeds up cleanup and changeover. A stack type flexographic printing machine is particularly effective when production runs require frequent color changes or when a plant has a limited footprint. The stack flexo press configuration also reduces the total length of the web path compared with inline presses, helping maintain stable tension on thin or extensible paper. For job shops and integrated box plants alike, the vertical stack flexo press delivers dependable register accuracy and simple maintenance without the higher capital cost associated with large central impression machines. Because each station has an independent impression cylinder, the operator can adjust pressure settings without affecting adjacent colors. The open design also supports fast plate mounting and easier video inspection of wet print.
The STP Series Stack Type Paper Printing Machine is engineered for paper converters and box plants that demand repeatable multi-color results on kraft, test liner, coated board, and preprint paper. Each color deck is driven by an individual AC servo motor and is equipped with closed-loop tension control, automatic pre-register, and real-time register monitoring. The standard configuration includes enclosed doctor blade chambers, quick-change ceramic anilox rollers, pneumatic plate cylinder locking, and motorized pressure positioning. A touchscreen PLC stores up to 200 job recipes, displays web tension and dryer temperature, and logs production data for quality reporting. The dryer section can be supplied with hot air, infrared, or a combination of both, and nozzle positions can be adjusted manually or automatically according to the repeat length. For water-based ink systems, the machine uses stainless steel ink pans and a wash-up circuit; for solvent-based inks, an exhaust system and ATEX-compliant components are available. The unwind and rewind units handle roll diameters up to 1,500 mm and can be equipped with hydraulic shaftless loading for reduced roll handling time. The frame is designed for future expansion, so additional color stations can be installed without replacing the main web path.
| Model | Web Width | Color Stations | Max Speed | Repeat Length | Substrate Weight | Dryer Type |
|---|---|---|---|---|---|---|
| STP-800 | 800 mm | 2–4 | 220 m/min | 300–800 mm | 80–300 g/m² | Hot air or IR |
| STP-1100 | 1100 mm | 2–6 | 220 m/min | 300–900 mm | 80–350 g/m² | Hot air + IR |
| STP-1300 | 1300 mm | 2–6 | 250 m/min | 300–1000 mm | 100–400 g/m² | Hot air + IR |
| STP-1600 | 1600 mm | 2–8 | 250 m/min | 300–1000 mm | 120–400 g/m² | Hot air + IR / UV optional |
Optional production upgrades include corona treatment, web cleaning, video inspection, and an in-line rotary die cutting module. These upgrades integrate directly with the main control system and are available as factory-installed or retrofit packages.
