Flexo Printer Slotter Machine: Technical Guide for Corrugated Converting

The flexo printer slotter is a key converting machine that prints graphics and cuts slots on corrugated board sheets. It is often used as a standalone unit or as the front section of a flexo folder gluer line.

What is a Flexo Printer Slotter?

A flexo printer slotter (also called printer slotter or flexo printer slotter die cutter) performs

1. Flexographic printing on corrugated board

2. Slotting (cutting flap slots)

3. Scoring (creating fold lines)

4. Optional die cutting for special shapes

The output is printed, slotted sheets that are then folded and glued on a separate folder gluer — or the machine may include inline folding and gluing (becoming an FFG).

Machine Configurations

Printer Slotter Only

Prints and slots sheets only

Output goes to separate folder gluer

Lower investment, more flexibility

Common in small-to-medium factories

Printer Slotter + Folder Gluer (FFG)

Integrated inline system

Sheet enters, finished box exits

Higher efficiency, less labor

Standard for medium-to-large operations

Printer Slotter + Rotary Die Cutter

Adds die cutting capability for complex shapes

Used for display boxes, retail packaging, die-cut designs

Premium configuration for diverse product range

Printing Technology

Flexographic Printing Process

Anilox roll meters ink onto printing plate

Printing plate (rubber or photopolymer) transfers image to board

Doctor blade controls ink film thickness

Water-based inks standard for corrugated (eco-friendly, fast drying)

Print Quality Factors

Anilox roll line screen (lines per inch)

Plate quality and mounting accuracy

Board surface quality (liner smoothness)

Ink viscosity and pH control

Registration system precision

Color Configurations

1-color: Most economical, logos and simple text

2-color: Standard for shipping boxes with branding

3-4 color: Retail-quality graphics, display boxes

6+ color: Premium quality, less common on corrugated

Slotting and Scoring

Slotting

Rotary knives cut vertical slots for box flaps

Adjustable slot positions for different box sizes

Slot width and depth critical for folding quality

Scoring

Crease wheels create fold lines

Score depth must match board caliper

Too deep: Board cracks; Too shallow: Poor folding

Offset scoring available for inside/outside fold requirements

Key Specifications

Speed: 80-300 sheets/min

Max Sheet Size: Up to 1600×2800mm

Min Sheet Size: 350×500mm

Board Caliper: 2-10mm

Print Colors: 1-6

Power: 25-60 kW

Price Range (2026)

1-color printer slotter: $50,000 - $100,000

2-color printer slotter: $100,000 - $200,000

4-color printer slotter: $200,000 - $400,000

With rotary die cutter: Add $80,000 - $200,000

Choosing the Right Configuration

For Shipping Boxes Only

1-2 color printer slotter + folder gluer

Focus on speed and reliability over print quality

RSC box designs only

For Retail and Display Packaging

3-4 color with rotary die cutter

Higher print quality anilox rolls and plates

Complex die-cut shapes

For Mixed Production

2-color printer slotter with quick-change print stations

Separate flatbed die cutter for small-batch custom shapes

Flexible folder gluer for various box styles

Maintenance Tips

Clean anilox rolls daily to prevent ink drying and plugging

Check printing plate mounting before each run

Replace slotting knives when cut quality degrades

Calibrate registration system weekly

Monitor ink viscosity and pH throughout production

Integration with Corrugating Line

The printer slotter receives sheets from the corrugating line stacker. Key integration points

Sheet size must match corrugating line slitter scorer settings

Production speed should balance with corrugating line output

Board quality from corrugator directly affects print quality

Moisture content at stacker exit affects feeding reliability

Contact Xuegong for complete corrugating and converting line solutions.