SHLM-S New Gantry Slitter | Heavy-Duty Jumbo Paper Roll Slitting & Rewinding Machine

The SHLM-S new gantry slitter is a high-precision slitting and rewinding machine engineered for extra-large diameter paper rolls. Built on an integrated heavy gantry frame with full servo drive and automatic constant tension center winding, it stably processes kraft paper, white cardboard, coated paper, laminated paper, and silicone release paper ranging from 30 to 500 g/m². With a maximum slitting speed of 500 m/min and a shaftless hydraulic unwinding capacity exceeding 3 tons, the SHLM-S is purpose-built for mass continuous production in paper mills, printing houses, and converting facilities.

Performance & Features

● The machine is driven by full servo motors and equipped with an automatic constant tension system and center winding structure. The main unit adopts variable frequency speed regulation to ensure smooth acceleration and deceleration without vibration or web deviation, delivering stable processing accuracy.

● It is controlled by an intelligent PLC system, supporting automatic meter counting, automatic shutdown and alarm upon residual material detection, and precise shutdown at preset lengths. The rewinding part adopts front and rear dual-station A/B air expansion shafts with hydraulic automatic unloading, realizing efficient and labor-saving roll change.

● A high-sensitivity imported web guiding system is installed. It enables stable high-speed slitting even for raw materials with uneven edges or poor flatness, greatly increasing the yield of finished products.

● It adopts a combined circular knife slitting structure (automatic knife adjustment is available as a paid option). A high-pressure fan is fitted for automatic waste edge discharge, ensuring neat slitting and smooth waste edge removal with no manual cleaning needed.

● The heavy-duty shaftless hydraulic loading mechanism features a load capacity of over 3 tons, which easily meets the loading requirements for extra-large and heavy rolls.

● 3–6 inch air expansion shafts are optional for unwinding. A 3-inch key-type air expansion shaft comes as standard for rewinding, and other special sizes can be customized on demand.

● For standard models, the maximum unwinding diameter is 1200mm–1500mm and the rewinding diameter is 1200mm. Custom roll diameters are available.

● The working width and overall dimensions of the whole machine can be flexibly customized according to customers' workshop layout and production demands.

● The maximum operating speed is up to 500m/min. It improves production efficiency remarkably while maintaining high precision, and is well suited for mass continuous production.

Specifications showing only the width of the specific section:

Integrated Heavy Gantry Frame for Extra-Large Roll Processing

Unlike conventional slitter designs, the SHLM-S adopts a thick steel integrated gantry frame that provides superior structural rigidity and vibration damping. This heavy-duty construction accommodates jumbo rolls weighing over 3 tons without deflection, ensuring consistent slitting precision across the full working width. The gantry architecture also allows easy access for roll loading, operator monitoring, and maintenance.

Shaftless Hydraulic Unwinding (3 Ton Capacity)

The heavy-duty shaftless hydraulic loading mechanism grips jumbo rolls directly without expansion shafts, supporting loads exceeding 3 tons. This eliminates the need for manual shaft insertion, reduces roll-change time, and accommodates extra-large diameter rolls up to 1500mm. Hydraulic clamping ensures secure, vibration-free operation even at maximum speed.

Dual A/B Air Shaft Rewinding with Hydraulic Auto-Unloading

The rewinding section features front and rear dual-station A/B air expansion shafts, enabling continuous production—while one station winds, the other is unloaded and reloaded. Hydraulic automatic unloading removes finished rolls effortlessly, minimizing operator fatigue and maximizing throughput. Standard 3-inch key-type air shafts are included, with 3–6 inch options available for unwinding.

Full-Servo Constant Tension Center Winding System

The SHLM-S is driven by full servo motors equipped with an automatic constant tension system and center winding structure. Variable frequency speed regulation ensures smooth acceleration and deceleration without vibration or web deviation, delivering stable processing accuracy across different paper grades and grammages. The servo-driven tension control adapts in real time to roll diameter changes, maintaining uniform winding tightness from core to outer layer.

Smooth Acceleration & Deceleration Without Web Deviation

The main unit's variable frequency drive ramps speed gradually, preventing sudden tension spikes that cause web breaks or telescoping. This is critical for lightweight papers (30 g/m²) and high-speed operation at 500 m/min.

Consistent Winding Tightness Across All Diameters

As roll diameter increases during winding, the servo system automatically adjusts torque to maintain constant tension. This prevents loose cores, telescoping, and starring—ensuring every finished roll meets downstream processing specifications.

Combined Circular Knife Slitting with Automatic Waste Removal

The SHLM-S employs a combined circular knife slitting structure that delivers clean, burr-free cuts across the full web width. An optional automatic knife adjustment system (available as a paid upgrade) enables programmable knife positioning without manual setup, dramatically reducing changeover time between different slit widths. A high-pressure blower provides automatic waste edge discharge, ensuring neat slitting and smooth waste removal with no manual cleaning required.

Precision Circular Shear Knife Configuration

Top and bottom circular knives are paired at precise overlap angles to shear-cut paper cleanly. The knife holder system accommodates multiple slit positions across the web width, supporting custom width configurations for different product specifications.

Optional Auto Knife Adjustment for Rapid Changeover

The paid auto knife adjustment option motorizes knife positioning, allowing operators to set slit widths via the PLC touch HMI. This reduces changeover time from hours to minutes and eliminates positioning errors from manual knife setting.

High-Pressure Blower Waste Edge Discharge

Trimmed waste edges are continuously evacuated by a high-pressure blower system, preventing accumulation on the machine bed. This ensures uninterrupted production and maintains a clean working environment without manual cleanup stops.

Siemens PLC Intelligent Control System

A Siemens PLC intelligent control system manages all machine functions through a touch HMI interface. Integrated capabilities include automatic meter counting, automatic shutdown and alarm upon residual material detection, and precise shutdown at preset lengths. The system also supports adjustable forward and reverse rotation for defect correction and splicing operations, reducing manual intervention and boosting productivity.

Automatic Meter Counting & Preset-Length Stop

The PLC tracks roll length with high accuracy and supports preset target lengths for automatic shutdown. This enables unattended production runs, reduces material waste from over-rolling, and ensures consistent roll lengths for downstream operations.

Residual Material Alarm & Auto Shutdown

Sensors detect remaining material on the unwinding roll and trigger an alarm with automatic shutdown when supplies run low. This prevents dry runs, protects knives and tension system from damage, and ensures operators can reload material before production stops completely.

Imported High-Sensitivity EPC Web Guiding (±0.1mm Precision)

A high-sensitivity imported photoelectric web guiding system is installed to correct material deviation in real time. Even with raw materials that have uneven edges or poor flatness, the SHLM-S maintains stable high-speed slitting at up to 500 m/min. The EPC system achieves guiding precision of ±0.1 mm, greatly increasing the yield of finished products and reducing waste from edge defects.

SHLM-S Gantry Slitter Technical Specifications

Four standard working widths are available to match common jumbo roll sizes. All models share the same maximum slitting speed (500 m/min), EPC precision (±0.1 mm), maximum unwinding diameter (1500 mm), and maximum rewinding diameter (1200 mm). Custom working widths, roll diameters, and air shaft sizes (3–6 inch) are available upon request to match specific production requirements.

SHLM-S1300 — 1300mm Narrow Gantry Slitter

Working width: 1300mm | Max unwind: 1500mm | Max rewind: 1200mm | Speed: 500 m/min | Power: 32 kW | Weight: 5,800 kg | Dimension: 7360×4300×2050mm. Ideal for medium jumbo roll production with standard paper grades.

SHLM-S1600 — 1600mm Standard Gantry Slitter

Working width: 1600mm | Max unwind: 1500mm | Max rewind: 1200mm | Speed: 500 m/min | Power: 35 kW | Weight: 7,000 kg | Dimension: 7360×4600×2050mm. General-purpose model for most converting operations.

SHLM-S2000 — 2000mm Wide Format Heavy Gantry Slitter

Working width: 2000mm | Max unwind: 1500mm | Max rewind: 1200mm | Speed: 500 m/min | Power: 42 kW | Weight: 8,000 kg | Dimension: 7360×5000×2050mm. Designed for high-volume wide-format paper processing.

SHLM-S2500 — 2500mm Extra Wide Gantry Slitter

Working width: 2500mm | Max unwind: 1500mm | Max rewind: 1200mm | Speed: 500 m/min | Power: 45 kW | Weight: 9,000 kg | Dimension: 7360×5000×2050mm. Maximum width for large-volume jumbo paper mills and heavy-duty continuous production.

Compatible Materials & Industry Applications

The SHLM-S gantry slitter processes a wide range of paper materials from 30 to 500 g/m², making it suitable for paper mills, printing and packaging facilities, and specialty paper converters. Its heavy-duty construction and full-servo tension control handle both lightweight and heavy-grade papers with equal precision.

Kraft Paper Slitting

Processes kraft paper rolls for packaging, corrugated board production, and industrial applications. The constant tension system handles heavy kraft grades without stretching or tearing, producing tightly wound, defect-free finished rolls.

White Cardboard & Coated Paper Slitting

High-precision slitting for white cardboard and coated art paper used in packaging, greeting cards, and premium printing applications. The circular knife system produces clean, burr-free edges that meet strict quality standards for downstream printing and folding.

Laminated Paper & Silicone Release Paper Slitting

Handles laminated paper and silicone release paper for label stock, medical packaging, and release liner applications. The EPC web guiding ensures precise edge alignment critical for adhesive-coated materials.

Why Choose Sanhui SHLM-S New Gantry Slitter

Sanhui Machinery brings years of expertise in heavy-duty paper converting equipment. The SHLM-S represents the pinnacle of our gantry slitter lineup, combining a rigid integrated gantry frame, full-servo constant tension control, Siemens PLC automation, ±0.1 mm imported EPC precision, and a 3 ton shaftless hydraulic loading capacity. Key advantages include: 500 m/min maximum speed, dual A/B rewinding stations with hydraulic auto-unloading, combined circular knife slitting with optional auto adjustment, high-pressure blower waste removal, and four working widths (1300/1600/2000/2500mm) with full customization available. Backed by comprehensive after-sales support and global export experience, the SHLM-S is the ideal slitting solution for enterprises demanding high-volume, high-precision jumbo roll processing.

Frequently Asked Questions About SHLM-S Gantry Slitter

What materials can the SHLM-S gantry slitter process?

The SHLM-S is compatible with kraft paper, white cardboard, coated art paper, laminated paper, and silicone release paper, ranging from 30 to 500 g/m² in grammage. It is designed for high-precision slitting and rewinding of extra-large diameter paper rolls.

What is the maximum slitting speed of the SHLM-S?

The maximum operating speed is 500 m/min, with adjustable speed range from 0 to 500 m/min to suit different paper grades and processing requirements.

What is the maximum roll diameter the SHLM-S can handle?

Standard maximum unwinding diameter is 1500mm and maximum rewinding diameter is 1200mm. Custom roll diameters are available upon request. The shaftless hydraulic unwinding mechanism supports rolls weighing over 3 tons.

What working widths are available for the SHLM-S?

Four standard widths are offered: 1300mm, 1600mm, 2000mm, and 2500mm. Custom working widths and overall dimensions can be tailored to the customer's workshop layout and production demands.

Does the SHLM-S support automatic knife adjustment?

Yes. Automatic knife adjustment is available as a paid optional upgrade. It enables programmable knife positioning via the PLC touch HMI, dramatically reducing changeover time between different slit widths.

What is the EPC guiding precision of the SHLM-S?

The imported high-sensitivity photoelectric EPC system maintains ±0.1 mm guiding precision, ensuring stable high-speed slitting even with raw materials that have uneven edges or poor flatness.