Stack Flexographic Press
Stack-Type Unit Printing System for Flexible Packaging
This stack-type flexographic printing system is engineered for flexible packaging production with vertically or horizontally stacked, independent color stations. Unlike central impression (CI) systems where all colors share one impression drum, each printing unit carries its own anilox, impression cylinder, and ink system—delivering modular maintenance, economical operation, and straightforward expansion from 2 to 8 colors.
Machine Architecture
Modular Stack Design Built for Daily Production
Four integrated subsystems work together to keep tension stable, color stations independent, and changeovers manageable on narrow and medium web jobs.
Independent Printing Unit Structure
Each color station operates as a self-contained module with dedicated anilox roller, impression cylinder, and ink supply. Units can be maintained, cleaned, or replaced independently without shutting down the entire press.
- Anilox roller system per unit
- Impression cylinder per unit
- Modular ink supply and doctoring
- Flexible configuration expansion (2 / 4 / 6 / 8 colors)
Stack-Type Unit Layout
Printing units are arranged vertically or horizontally in a compact stack, minimizing footprint while keeping each station accessible for makeready and plate changes.
- Compact footprint for converter halls
- Independent color control per deck
- Synchronized drive across the stack
- Ideal for narrow and medium web applications
Gear-Driven Transmission System
Industrial gear-driven transmission delivers stable power transfer across printing units. The proven mechanical layout prioritizes durability, predictable maintenance, and long-term uptime in daily production.
- Gear-driven main transmission
- Stable torque delivery at production speed
- Industrial-grade components
- Designed for long-term continuous operation
Advanced Tension Control System
Web tension is managed through an advanced control loop with automatic adjustment and load-cell feedback ahead of the printing units—protecting registration on thin films and lightweight papers.
- Automatic tension adjustment
- Load-cell feedback before printing units
- Stable feeding for 10–200 µm substrates
- Manual or automatic unwind options
Technical Specifications
Configure Your Platform
Select color count and web width to preview typical specifications. Final configuration is quoted to your substrate, speed target, and finishing scope.
Stack-Type Unit · 6-color · 1000 mm
- Machine type
- Stack flexographic printing machine
- Structure
- Stack-type independent color stations
- Transmission
- Gear-driven roll-to-roll system
- Printing mode
- Continuous roll-to-roll flexographic printing
- Color options
- 6 colors
- Print width
- 1000 mm
- Print repeat
- Adjustable via registration system
- Max speed
- 150 m/min (stable production 100–180 m/min)
- Registration
- ±0.15 – 0.25 mm
- Substrate thickness
- 10 – 200 microns
- Ink system
- Open chamber or doctor blade (optional)
- Unwind / rewind
- Max roll diameter 800 mm · Servo torque rewind
- Machine length
- Approx. 9 – 11 m
- Machine width
- Approx. 2.8 – 3.2 m
- Machine height
- Approx. 2.8 – 3.5 m
- Machine weight
- Approx. 12 – 14 t
Material Compatibility
BOPP, OCPP, pearlized film, paper, kraft paper, woven fabric, and other common flexible packaging substrates within the rated thickness range.
Printing Performance
Consistent ink transfer at up to 150 m/min with independent color decks, suitable for economical daily flexible packaging graphics.
Drying System
Per-unit drying with modular exhaust arrangement. High-speed and reinforced drying modules available for demanding ink sets.
Production Workflow
From Unwind to Finished Roll
Unwind
Roll feeding with manual or automatic unwind options and diameter monitoring up to 800 mm.
Tension Control
Closed-loop web tension with automatic adjustment and feedback before the first printing unit.
Stack Printing
Independent color stations print sequentially in the stack with gear-driven synchronization.
Inter-station Drying
Each unit can integrate drying capacity to stabilize ink before the next color deck.
Web Transfer
Material passes through the stack to the next color or finishing module with controlled tension.
Rewind
Servo torque rewind produces finished rolls up to 800 mm diameter for downstream converting.
Optional Components
Standard Scope & Upgrade Paths
Base configuration includes gear-driven stack printing units, tension control, per-unit drying, unwind / rewind, and registration system suitable for general flexible packaging production.
- Registration control system
- Per-unit drying and exhaust
- Modular frame with maintenance access
- Independent lubrication per unit
Upgraded drying modules improve stability at higher speeds and for heavier ink laydown—recommended when targeting sustained output above typical daily speeds.
Compact stack layout optimized for label and narrow flexible packaging widths, preserving independent color decks in a reduced footprint.
Optional automatic unwind, splice preparation, and corona treatment modules can be integrated upstream of the first printing unit based on substrate requirements.
Application Industries
Built for Everyday Flexible Packaging Jobs
Packaging Bags
Shopping bags, carrier bags, and daily packaging bag stocks with inline graphics.
Food Packaging Films
Snack, frozen food, and barrier film structures within the rated thickness window.
Industrial Wrapping Films
Industrial wrapping, courier films, and paper packaging products for medium batch output.
System Advantages
Why Converters Choose Stack Flexo
| Factor | Stack-Type Unit Flexo | Typical CI Flexo |
|---|---|---|
| Initial investment | Lower entry cost | Higher capital layout |
| Maintenance | Per-unit service without full-line shutdown | Shared drum affects entire line |
| Operation | Simpler operator workflow | Higher training requirement |
| Material range | Film, paper, nonwoven within spec | Strong on premium CI graphics |
| Best fit | Medium batch, economical packaging | High-end CI graphics at speed |
- Cost efficiency — economical platform compared with CI systems for small and medium factories.
- Flexible maintenance — each color unit operates and can be serviced independently.
- Material adaptability — film, paper, and nonwoven within the rated thickness range.
- Simpler operation — lower operator skill requirements and faster onboarding.
FAQ
Common Questions About Stack Flexo
It is a flexographic printing system where independent printing units are stacked vertically or horizontally. Each unit prints one color and operates independently, unlike CI presses that share a central impression drum.
This platform supports BOPP, OCPP, pearlized film, paper, kraft paper, woven fabric, and other flexible substrates from 10 to 200 microns, subject to final process validation.
Stack flexo offers lower cost, easier maintenance, and flexible operation for general packaging. CI machines deliver higher precision for premium graphics but require greater investment and operating complexity.