Densitrol - WEBSITE X5 UNREGISTERED VERSION - Density Measurement System

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Densitrol

Densitrol is a quality control system for two-drum winders.

making good finished rolls from ”difficult paper” in large roll diameters on two-drum winders without excellent control system for the winder parameters is impossible

making good finished rolls from ”difficult paper” in large roll diameters on two-drum winders with excellent control system for the winder parameters is difficult

difficult paper = thermomechanical or waste (recycled) paper pulp








When changing paper data Densitrol changes the algorithms for

  • Rider roll pressure

  • Web tension

  • Winder speed

  • Speed difference between drums


so the best possible roll build up is achieved

 
 

To make good quality rolls a good paper density measurement system is necessary.

The Density Measurement System has an extremely advanced pulse counter made in programmable logic circuits.
The pulse counter is done with a specially developed algorithms to provides an extreme resolution and 60 layers of paper after reel change are the density measuring working (see Figure 1).
Thickness and density measurement is updated every three layers of paper.








Figure 1: Data logging, diagrams as a function of diameter.

Auto Stop at Diameter or Length.
Loss reduction by precise calculation of required roll size.

Wound in Density Profiles.
Continuous monitoring of roll structure for quality assurance. Reduces crepe wrinkles and shipping deformation of rolls.

Setpoint Control.
Improved roll structure or quality using diameter dependent control curves optimized by grade and roll size.

Additional Monitoring.
Improved process diagnostics by monitoring and archiving control and quality parameters (force, pressure, tension, torque, etc.).



Figure 2: Data logging, diagrams as a function of time.

 
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