Opening of Fibre Material
category
Opening is the progressive reduction of fibre tufts from compressed bale form (density ~400–800 kg/m³) down to tufts as small as 0.1 mg in the blowroom. Unlike the card which opens to individual fibres, the blowroom opens only to the tuft stage. The degree of opening follows a diminishing-returns curve along the blowroom line.
Role
Opening creates new surfaces from which impurities can be removed, and is a prerequisite for effective cleaning, blending, and uniform card feeding. Over-intensive opening increases neppiness, fibre damage, and unnecessary fibre loss.
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Subtopics
- Endless Path Devices (Spiked Lattices) Spiked lattices are circulating endless belts with transverse bars carrying steel spikes at an angle…
- Rotating Opening Devices Rotating devices include spiked rollers (600–1000 rpm), drums with teeth or spikes (400–800 rpm, ≥60…
- Automatic Bale Opening Machines Second-generation traveling-type bale openers move past stationary bales, extracting material from t…
- Degree of Opening and Its Progression The degree of opening is measured as specific volume (cm³/g) and follows a logarithmic curve along t…
- Feeding Apparatus and Clamping Systems Material can be fed to opening rollers in free flight (gentle but less intensive) or in a clamped co…
- Conventional and Waste Bale Openers Conventional bale openers use inclined spiked lattices with evener rollers in a hopper configuration…
- High-Performance Blowroom Line Concept A modern high-performance blowroom line consists of only 4 machines: automatic bale opener (opening …
- Toothed Disc Rollers and Double-Tooth Systems Toothed disc units have triangular plucking elements (coarse saw teeth) secured to a shaft with spac…
- Kirschner Beaters and Pinned Bar Systems Kirschner beaters use pinned bars (pinned lags) secured to cast-iron arms, combing through the web a…
- Gripping Elements (Plucking Springs) Plucking springs consist of two spring systems facing each other like tongs, dropped into feed mater…