The Slitter Scorer is the dry‑end converting module in a corrugator line that slits the continuous corrugated board web into the required widths and scores it with crease lines for folding.
It prepares the board for the cut‑off knife and stacking, ensuring accurate dimensions, clean edges, and precise fold lines for downstream box‑making.
It combines two operations in one pass:
Slitting
rotary knives cut the board to width
Scoring
scoring wheels create controlled crease lines without damaging flutes
Construction Features
Slitting Section
Rotary top and bottom knives (shear cut or crush cut) mounted on precision shafts.
Scoring Section
Male/female scoring heads or rings to form creases.
Stations
Multiple knife and scorer stations for flexible order setups.
Positioning System
Manual, motorized, or servo driven for quick, accurate repositioning
Integrated Grinding
On board knife sharpeners for clean cuts without stopping
Drive System
Synchronized with the corrugator for consistent web speed.
Frame & Bearings
Heavy duty, vibration free construction for high speed operation
Safety Guards
Full enclosure with interlocks
Common Types
- Manual‑Set Slitter Scorers – Lower cost, slower changeovers.
- Motorized‑Set Slitter Scorers – Faster positioning via electric drives.
- Servo‑Driven Auto‑Set – High‑precision, rapid changeovers with stored job recipes.
- Single‑Level – Slitting and scoring on one level; compact footprint.
- Double‑Level – Separate upper and lower levels for slitting and scoring; allows pre‑set for next order.
- Swing‑Change Systems – Keep trim knives in the web during order change to avoid jams
Key Selection Factors
- Order Change Speed – Auto‑set and double‑level designs minimize downtime.
- Board Grades & Flute Types – Knife and scorer profiles must match board caliper and flute geometry.
- Cut Quality Requirements – Shear cut for premium edges; crush cut for simpler setups.
- Scoring Accuracy – Adjustable depth and pressure for different liners and mediums.
- Machine Speed – Must match corrugator’s maximum speed (often 350–400 m/min).
- Integration – Compatibility with upstream double facer and downstream cut‑off knife.
- Maintenance Access – Easy blade change, scorer ring replacement, and cleaning.
- Safety Compliance – Meets CE/OSHA standards.
Key Selection Factors
- Order Change Speed – Auto‑set and double‑level designs minimize downtime.
- Board Grades & Flute Types – Knife and scorer profiles must match board caliper and flute geometry.
- Cut Quality Requirements – Shear cut for premium edges; crush cut for simpler setups.
- Scoring Accuracy – Adjustable depth and pressure for different liners and mediums.
- Machine Speed – Must match corrugator’s maximum speed (often 350–400 m/min).
- Integration – Compatibility with upstream double facer and downstream cut‑off knife.
- Maintenance Access – Easy blade change, scorer ring replacement, and cleaning.
- Safety Compliance – Meets CE/OSHA standards.
Maintenance & Care
- Daily Cleaning – Remove dust and adhesive build‑up from knives and scorers.
- Knife Sharpening – Use integrated grinders or remove for regrinding at correct bevel.
- Scorer Ring Inspection – Replace worn or chipped rings to maintain crease quality.
- Alignment Checks – Ensure knives and scorers are parallel and correctly set.
- Lubrication – Maintain bearings and slides per OEM schedule.
- Calibration – Verify auto‑set positioning accuracy regularly.
- Safety Checks – Inspect guards, interlocks, and emergency stops
Latest Technology Trends
- Servo‑Driven Auto‑Positioning – Rapid, precise knife/scorer moves with stored job data.
- Swing‑Change Technology – Keeps trim knives in the web during order change to prevent jams.
- Integrated Knife Grinding – Automatic sharpening during operation for consistent cut quality.
- Intelligent Line‑Following Systems (iLFS) – Camera and QR code‑based positioning for preprint alignment at full speed.
- Tandem Order Change Systems – Change scorer positions without slowing down, reducing waste by up to two‑thirds.
- Closed‑Loop Position Feedback – Real‑time adjustment to maintain accuracy.
- Dust Extraction Integration – Improves cut quality and reduces contamination.
Key Parameters to Order
Parameter | Why It Matters | Typical Range / Note |
Machine Width | Must match corrugator | 1800–2800 mm |
Max Speed | Matches line capacity | 150–400 m/min |
Number of Stations | Flexibility for orders | 4–8 knives, 4–8 scorers |
Knife Type | Cut quality & dust control | Shear, crush, razor |
Knife Diameter | Cutting performance | 200–300 mm typical |
Scorer Profile | Crease quality | OEM‑specific male/female rings |
Positioning System | Changeover speed | Manual, motorized, servo |
Integrated Grinding | Cut consistency | Auto or manual |
Control System | Automation level | PLC/HMI with recipe storage |
Safety Features | Compliance | CE/OSHA standards |
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