3M Web Line

Web lines are the equipment that used in converting paper, film, foil and others webs into valued product.  The key of the process control is defect prevention. There are four main defect areas like abrasion, wrinkling, deformation and breakage.
To prevent these defects, we need to understand how webs and web line equipment work and how the two interact. Before we control the web line, we must be able to handle the web before we can process it and knowledge starts with web handling, how to unwind, transport, and rewind web materials.

Web properties:  Tailor web processes to web material. We must consider the web’s mechanical behavior and limits, surface characteristics, and interaction with the environment.
Tension Control:  The tension control system determines length, registration, width, and speed. Web tension magnitude and variation are at the root of all four major web defect areas.
Lateral Position Control: Web tracking relative to machine centerline may involve the “normal entry rule,” variable diameter rollers or sophisticated closed loop control.
Controls: web spring constants and wound-roll inertial variations make web control unique. Lateral control is limited by the web’s mechanical limitations.

With our expertise in process integration, we control coating, dying, laminating etc to provide continuous processing. Integrating process steps into a single web line reduces costs, increases yield, and improves productivity.
We have extensive experience in web line controls in numbers of industries. Over the past few years, our engineers have implemented the closed loop control system for high speed web application with the servo solution.

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