MODERN DREF SPINNING

Harshal M. Adhe T.Y. B.Tech (Textile Technology)

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Content

Conventional DREF Spinning

Modern Dref Spinning

DREF 2000

DREF 3000

Conclusions

References

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Conventional DREF spinning machines

DREF I DREF II

DREF 3 DREF 5

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Modern DREF spinning machines

DREF 2000

DREF 3000

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DREF 2000First demonstrated in ITMA, 1999

Principles of working:

1 Carded slivers 2 Opening roller 3 Blower 4 Perforated drums 5 Suction streams 6 Open end of yarn 7 Fibre cloud

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Specifications of Rieter Dref 2000

• Available in 1 to 8 spinning sections with 6 spinning heads each

• Yarn Count Range 40 to 2000 tex (Ne 0.3 - 14.5)

• Yarn Delivery Speed Up to 250m/min

• Fiber types Natural, manmade, special fibers Fiber denier: 1.7 to 10 dtex Staple length: 1 to 120 mm

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Continued……

• Feeding 5-15 ktex card slivers 3-7 ktex drafter slivers Max. 30 ktex total weight/spinning head

• Bobbin dimensions Traverse 200mm Max. Diameter 400mm

• Bobbin Weight Up to 8kg

• Filaments Mono and multi-filaments, Glass Fibre Filaments Plied Yarns, Tapes, Metallic Wires, etc

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Advantages

System flexibility and simplicity Reduced yarn preparation costs due to high sliver weights High spinning speeds High bobbin weights Spinning of waste Elimination of process stages Simple, variable and single adjustment of the negative pressure

for all spinning heads. Feeding of all types of filaments, yarns and components as yarn

cores, in order to attain high yarn strength and production speeds, voluminous yarns and specific product characteristics

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ApplicationsBlankets for the hometex, hotels, Hospitals, Military uses, plaids etc.

Deco- and upholstery fabrics

Outerwear and leisure-wear

carpet backing for tufting carpets

Interlinings

Canvas and tarpaulins for the military

High-tenacity core yarn for ropes, transport and conveyor belts

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DREF 3000 It is first demonstrated in ITMA 2003

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Specifications of Rieter Dref 3000

Yarn Count Range:40 to 700 tex (Ne 0.9 to 14.5)

Yarn Delivery SpeedUp to 250m/min

Fibre MaterialCore fibresStaple Lengths: 32-60mm, Man-made fibers Cotton blends with manmade

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Continued…...Sheath-fibers:Staple Length 32-60mmMan-made fibres and special fibres as indicated for the core100% carded cotton

Fibre fineness:0.6 - 637 dtex

Feeding: Carded and drafted sliversCore 3 ktex - 6 ktexSheath: 3 ktex - 10 ktex

FilamentsMulti, mono, high tenacity or texturized filaments, yarnsMetallic Wires, glass yarn, etc.

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Industrial impact of DREF 3000

Dref-3000 is a typical process for the production of yarn specialties:

yarns made from unusual fibers

composite yarns with a special core/sheath structure

yarns with special properties (protective textiles).

Dref-3000 is therefore not a spinning process for mass production, but an interesting and successful system for niche markets, where special, tailor-made yarns are required.

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Applications

High tenacity and FR protective clothing for civil & military sector

Fire blocker for the aviation and contract business range, cut protection textiles

(protective gloves, mail-bags, seat coverings) Fibre composite materials for the aviation, automotive, etc. Interlinings for outerwear etc. Upholstery fabrics for contact business range Knitting sector, elastomeric fabrics Outdoor textiles (e.g. chair and dock-chair covering)

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Conclusions

The commercial, successful non-conventional yarn manufacturing machines have incorporated numerous innovations and developments on the machines that lead to improve yarn quality and power saving. These spinning systems become more flexible and thus now it is possible to spin various fancy/effect and core spun yarns. The conventional ring spinning system is going to face tough competition in near future.

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References:

New Spinning System By W. Klein

http://www.rieter.com/en/rikipedia/articles/alternative-spinning-systems/the-various-spinning-method

http://www.drefcorp.com

http://www.indiantextilejournal.com (Progress in non-conventional yarn manufacturing

systems – published in August 2010)

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