Analysis of the core functions of the intelligent hot stamping foil slitting machine: from automatic deviation correction to tension control

Intelligent hot stamping foil slitting machine is a key equipment in the packaging and printing industry, which is mainly used to cut wide hot stamping foil (hot stamping material) into narrow rolls of specific width, while ensuring slitting accuracy, material flatness and tension stability. Its core functions are realized through high-precision sensors, PLC control systems and mechatronics technology, and the following is a detailed breakdown of the key functions:

1. Automatic Web Guiding System (EPC)

Function: Real-time detection and correction of the lateral offset of hot stamping foil coil to ensure the alignment of the material edge during the slitting process to avoid waste.

Technical implementation:

• Photoelectric/ultrasonic sensors: detect the position of the edge of the material and feed the signal back to the control system.

• Servo motor driven guiding mechanism: the material position can be dynamically adjusted (the accuracy can reach ±0.1mm) by moving the guide roller or rewinding and unwinding the reel laterally.

Application scenario: It is suitable for high-speed slitting (200-800m/min) or thin hot stamping foil (such as below 12μm) to prevent uneven trimming caused by material deviation.

2. Tension control

Function: Keep the tension of unwinding, traction and winding in the slitting process constant, and avoid tensile deformation or wrinkling of the material.

Technical Solution:

• Closed-loop tension control: real-time tension monitoring through tension sensor or floating roller, PLC dynamically adjusts the torque of the magnetic particle clutch/servo motor.

• Segment control:

◦ Unwinding tension: automatically decreases with decreasing roll diameter (taper control).

◦ Traction tension: Keep constant to ensure smooth slitting.

◦ Winding tension: Adopt a gradual tension reduction mode to prevent the core from collapsing.

Advantages: Adaptable to different material properties (e.g. PET substrate or metal plating), tension fluctuations can be controlled within ±1%.

3. High-precision slitting

Function: Narrow slitting (down to 1mm) is achieved through the tool holder system, and the cut is smooth and burr-free.

Key Technologies:

• Round/flat slitting: Choose a tool based on the thickness of the material (e.g. diamond-coated inserts).

• CNC tool adjustment system: input the slitting width through the touch screen, and the servo motor automatically adjusts the tool distance (accuracy ± 0.05mm).

4. Intelligent control system

Functional Integration:

• Human-Machine Interface (HMI): Preset slitting parameters (width, speed, tension curve).

• PLC+ motion control card: coordinate deviation correction, tension, and slitting actions, and support multi-axis synchronization.

• Data traceability: record production data (such as meters, fault alarms), and support MES system docking.

5. Other Accessibility Features

• Static Elimination: Prevents the material from sticking or absorbing dust during slitting.

• Waste edge recycling: Automatically coil and cut the leftovers to keep them clean.

• Safety protection: emergency stop button, grating protection, in line with CE/UL standards.

summary

The core competitiveness of the intelligent hot stamping foil slitting machine lies in the combination of traditional machinery and intelligent control, ensuring the slitting alignment through automatic deviation correction, ensuring the stability of materials through multi-stage tension control, and improving the yield with high-precision slitting. Together, these functions solve the processing problems caused by the thin material and easy stretching of hot stamping foil, which is suitable for high-end packaging, labels and other fields. The future trend will be in the direction of AI predictive maintenance, higher speed (1000m/min+) and IoT integration.