Advertise Here [468 W x 60 H pixels]
Report | July 2014

Selection of beater design in fibre preparation

Brian A Leach and Kishore Kumar Khaitan discuss the issues related to how beater designs and the sequence of opening points influence fibre preparation.

Fibre opening is key to good yarn spinning. Good, gentle opening ensures maximum retension of fibre strength by minimising fibre rupture, reducing the level of neps, effective thrash removal and minimal amounts of micro dust and lint. It is obvious that well cleaned and opened fibre is a prerequisite to high quality carding and spinning. However, the fact is that this is very difficult to achieve for a spinning mill since the fibre quality, fibre mix, product mix, etc. keep changing and the process has to be optimised to the new requirements. Even if the process is optimised, it is a challenge to maintain the consistency of quality.

In this article, we discuss the issues related to this subject and how beater designs and the sequence of opening points influence fibre preparation. In modern blow rooms, four types of beaters are primarily used disc beaters, peg beaters, pinned beaters and saw tooth beaters, each having it own function and suitability to certain requirements and conditions. As disc and peg beaters are used exclusively for beating and pre-opening of cotton fibres, we shall focus on pinned and saw tooth beaters for detailed analysis. It was not until the 1960s that blowroom cleaning machines embraced metallic wire as an option to bladed, porcupine, vertical or pin beaters.

Production limitations of traditional blowroom lines of around 300 kgs/hr gave way to metallic wire wound cylinders enabling dramatic increases in production. This provided more intense opening and cleaning, however, not without quality concession. Metallic wire in many applications results in fibre damage and requires frequent maintenance.

Typical Indian mills producing fine ring spun yarn up to the 1980s used up to seven cleaning points in their blowroom lines and no metallic wire was used. Though in modern blowroom lines, it is claimed that less cleaning points are required which helps reduce fibre damage at high productions rates, what is actually done is that multiple cleaning points are provided in a single blow room beater or card. However, even if one or two cleaning points are actually reduced, use of metallic wire leads to aggressive opening and consequent fibre rupture, which affects ring spun fine yarns quality in particular.

It may be prudent to replace the wire wound rolls with pinned rolls to reduce fibre damage, particularly for fine count, ring spun applications. Most super high production lines are suited for open end spinning operations where quality demands are more forgiving. Ring spun yarns, on the other hand, are very sensitive to speeds, over beating, and aggressive cleaning. Machine makers are thus increasingly adopting the pin technologies to overcome some of the issues posed by aggressive metallic wire cleaning.

Engineering improvements, such as use of long lasting alloy steel pins, extruded alloy aluminium lags and special pin profiles, along with proven advanced methods of pin fixing (eg. NIF method adopted by Stewarts) that provides pin-point accuracy, have dramatically improved the performance of pinned beaters, which was never achieved in wooden products. Leading manufacturers of modern blowroom and carding machines have adopted pin rollers and pinned aluminium profiles as the primary recommended specification. Choice of beaters and sequence of opening depends on the nature of fibre and the process requirements. Long staple cotton with low thrash would require lesser beating and more opening than short staple, thrashy cotton. Synthetic fibres require no beating and only gentle opening. Though not preferred, saw tooth wires can be used for opening polyester or nylon fibres. However, they can cause several problems if used for opening soft fibres like viscose since such fibres have a tendency to disintegrate under stress.<

Post your comment
Name:  
Email:    
Comments:  
Verification Code:   Change Image


 
Advertise Here [728 W x 90 H pixels]
AB Carter India Pvt Ltd      Angel Mechtronik      Arvind Rub-Web Controls Ltd      Associated Autotex Ancillaries Pvt Ltd      ATE Enterprises Pvt Ltd      B & R Industrial Automation Pvt Ltd      Basant Mechanical Works      Batliboi Ltd      Best Power Equipments India Pvt Ltd      Bharat Beams Pvt Ltd      Bhatt Bros      Condair      Elgi Electric and Industries Ltd      Embee Corporation      Eppinger Tooling Asia Pvt Ltd      Excel Traders      Gandhi Automations Pvt Ltd      Ion Exchange India Ltd      ITEMA WEAVING (INDIA) PVT LTD      Jogindra Industries Pvt Ltd      K.U. Sodalamuthu and Co. Pvt Ltd      Konica Electronics Enterprise      Kusters Calico Machinery Pvt Ltd      Labelmach      Lakshmi Machine works Ltd      Leuze Electronic Pvt Ltd      Loepfe Brothers Ltd (Masterline)      M-Tex Enterprises      Mayur Reeds And Healds Pvt Ltd      Nestling Technologies      Peass Industrial Engineers Pvt Ltd      Phoenix Textile Engineering Pvt Ltd      Prashant West Point Machinery Pvt. Ltd      Premier Evolvics Pvt Ltd      RENMAKCH India Pvt. Ltd      Rieter India Pvt Ltd (Suessen)      Rieter India Pvt. Ltd      Rossari Biotech Ltd      Savio Texcone Pvt Ltd      SB Dye Springs India Pvt Ltd      Schoch Reeds India      South Gujarat Chamber of Commerce & Industry      SRE Corporation      SSM Scharer Schweiter Mettler Ag (Rieter)      Stovec Industries Ltd      Sunrise Industries      Swiss Ribbons Pvt Ltd      Thies GmbH and Co.      Thymas Electronics Pvt Ltd      Truetzschler India Pvt Ltd      Uster Technologies AG      Vetal Hitech Machines Pvt. Ltd      Weavetech Engineering Pvt Ltd      AB Carter India Pvt Ltd      Angel Mechtronik      Arvind Rub-Web Controls Ltd      Associated Autotex Ancillaries Pvt Ltd      ATE Enterprises Pvt Ltd      B & R Industrial Automation Pvt Ltd      Basant Mechanical Works      Batliboi Ltd      Best Power Equipments India Pvt Ltd      Bharat Beams Pvt Ltd      Bhatt Bros      Condair      Elgi Electric and Industries Ltd      Embee Corporation      Eppinger Tooling Asia Pvt Ltd      Excel Traders      Gandhi Automations Pvt Ltd      Ion Exchange India Ltd      ITEMA WEAVING (INDIA) PVT LTD      Jogindra Industries Pvt Ltd      K.U. Sodalamuthu and Co. Pvt Ltd      Konica Electronics Enterprise      Kusters Calico Machinery Pvt Ltd      Labelmach      Lakshmi Machine works Ltd      Leuze Electronic Pvt Ltd      Loepfe Brothers Ltd (Masterline)      M-Tex Enterprises      Mayur Reeds And Healds Pvt Ltd      Nestling Technologies      Peass Industrial Engineers Pvt Ltd      Phoenix Textile Engineering Pvt Ltd      Prashant West Point Machinery Pvt. Ltd      Premier Evolvics Pvt Ltd      RENMAKCH India Pvt. Ltd      Rieter India Pvt Ltd (Suessen)      Rieter India Pvt. Ltd      Rossari Biotech Ltd      Savio Texcone Pvt Ltd      SB Dye Springs India Pvt Ltd      Schoch Reeds India      South Gujarat Chamber of Commerce & Industry      SRE Corporation      SSM Scharer Schweiter Mettler Ag (Rieter)      Stovec Industries Ltd      Sunrise Industries      Swiss Ribbons Pvt Ltd      Thies GmbH and Co.      Thymas Electronics Pvt Ltd      Truetzschler India Pvt Ltd      Uster Technologies AG      Vetal Hitech Machines Pvt. Ltd      Weavetech Engineering Pvt Ltd