Seminars for Engineers

Principles of Web Handling and Winding

April 16-18, 2024   •   Charlotte, North Carolina

Tim Walker

The Principles of Web Handling and Winding three-day seminar provides a complete understanding of these key converting fundamentals, covering the materials, equipment, and process factor knowledge to solve any web handling or winding problem. Web handling principles apply across any roller-transported manufacturing process, helping to improve productivity and reduce waste during production with papers, films, foils, nonwovens, textiles, belts, or any thin, continuous material. The seminar will cover key web handling topics in-depth beginning with material properties, tension control, roller design, nipped processes, web position control, and wrinkle prevention. The winding portion of the session covers all aspects of winding, including the physics and process of winding, roll quality, and winder design, control and operations.

Concepts Covered:

Introduction to Web Handling
  • Web Properties
  • Thickness Profile
  • Tension-Elongation
  • Curl and Bagginess
  • Speed, Length, and Diameter
  • Why Tension and How Much?
  • What is a Tension Zone?
  • How is Tension Created?
Rollers, Traction, and Flotation
  • What is a Roller?
  • Why/How are Rollers Aligned?
  • When Does a Roller Slip?
Nipped Systems and Laminating
  • What Creates Pressure and Pressure Variations in a Nip?
  • How are Nipped Systems Designed?
  • What are the Best Practices of Lamination?
Tracking, Wrinkling, Spreading, Guiding
  • What Causes Web Shifting?
  • What Causes Wrinkling?
  • How Do Spreaders Work?
  • How Do Web Guides Work
Winding, Winders, and Wound Rolls
  • Defining Winding Success
  • Material Properties (Web and Core)
  • Starting a Roll: Roll Transfers
  • Managing Initial Contact (Nip or Gap)
  • Driving a Roll (Center vs Surface)
  • Winder Tensions and Torques
  • Slip Shaft Winding
  • Defects
  • Wound-In Pressures and Stresses
  • Roll Edge Alignment
  • Transverse Variations (Gauge Bands, Bagginess)
  • In-Roll Buckling
  • What Determines Wind-Ability?
  • How is Winding Optimized?

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