Passive Unwinding (Simplest Unwinding Form)

Core Principle

• The simplest unwinding structure, relying on the traction force of downstream processing equipment to drive coil unwinding
• No independent drive device itself

Suitable Scenarios

• Applicable to scenarios with low unwinding precision requirements
• Fits materials with moderate hardness that are not easy to stretch and deform

Core Configuration & Parameters

• Main components: Unwinding frame, air expansion shaft (ordinary shaft for some simple models), tension adjustment device
• Maximum adaptable unwinding diameter: 500-1200mm (customizable on demand)
• Air expansion shaft: Facilitates quick loading and unloading of coils
• Tension adjustment: Realized by magnetic powder brake or mechanical damping structure, manual resistance adjustment available
• Function: Avoids coil looseness/deviation caused by excessive traction speed, or material stretching caused by excessive resistance

Core Advantages

• Simple structure, low cost
• Convenient maintenance, small floor space
• Suitable for small and medium-sized production lines and batch processing scenarios

Typical Applications

• Ordinary paper slitting, non-woven fabric cutting, low-end film processing, etc.

Inapplicable Scenarios/Materials

• Not suitable for deformable materials or high-precision processing needs
• Examples of inapplicable materials: Ultra-thin metal foil, high-elasticity film