Demonstrate knowledge of woollen carding and spinning technology

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1 Page 1 of 5 Demonstrate knowledge of woollen carding and spinning technology Level 5 Credits 20 Purpose People credited with this unit standard are able to demonstrate knowledge of: the nature and use of yarns manufactured on the woollen system; fibre and blend formulation for woollen spinning; woollen carding; card clothing used on a woollen card; woollen spinning; and tests used in woollen yarn manufacturing. Subfield Domain Status Textiles Manufacture Woollen Yarn Processing Registered Status date 23 April 2008 Date version published 23 April 2008 Planned review date 31 December 2013 Entry information Accreditation Standard setting body (SSB) Open. Evaluation of documentation and visit by NZQA and industry. Competenz Accreditation and Moderation Action Plan (AMAP) reference 0030 This AMAP can be accessed at Special notes Information to support the learning required for this standard can be obtained from papers and articles published by AgResearch. These may be obtained by contacting AgResearch and searching using the keyword Textiles.

2 Page 2 of 5 Elements and performance criteria Element 1 Demonstrate knowledge of the nature and use of yarns manufactured on the woollen system. 1.1 Woollen spun yarns are described in terms of their properties and end-use, and compared with semi-worsted and worsted yarns. properties count range, evenness, strength, elongation, bulk, hairiness, twist; end-uses woven apparel, knitted apparel, hand knitting yarn, carpets, furnishing, speciality products. 1.2 Fibres used for woollen processing are described in terms of fibre properties and suitability for end uses. fibre types wool and other natural fibres, man made fibres, wastes, noils, nops, neps, and blends from these groups; fibre properties fineness, length, strength, bulk, cost, handle, lustre, crimp, wool colour; end-uses woven apparel, knitted apparel, hand knitting yarn, carpets, furnishing. Element 2 Demonstrate knowledge of fibre and blend formulation for woollen spinning. 2.1 Properties of fibres and fibre blends are described in terms of processing performance and effects on yarn properties. fibre properties length, fineness, strength, bulk, colour, extension, stress and strain, crimp; fibre types wool and other natural fibres, man made fibres, wastes, noils, nops, neps, and blends from these groups. 2.2 Processing additives that are applied in woollen processing are described in terms of their function and effect during processing and application quantities calculated. processing lubricant, anti-stats, water, wetting agents, fugitive dyes.

3 Page 3 of 5 Element 3 Demonstrate knowledge of woollen carding. 3.1 Woollen carding is described in terms of process objectives. objectives fibre mixing, fibre disentanglement, maintenance of fibre length, vegetable matter removal, web formation, condensing. 3.2 Woollen card sections and components are described in terms of function, setting and operation. feed section including single hopper, double hopper, chute, scribbler, peralta, intermediate feed, carder, condenser. 3.3 Carding mechanisms used in woollen carding are described in terms of their function and operation. feed mechanisms including mechanical or automatic, Servolap, Microweigh, Microfeed; web monitoring systems; condenser mechanisms including rubbing and reciprocating action, series tape action, figure eight tape action, endless tape action; condenser creel mechanisms including high density spooling. 3.4 Carding actions are described and diagrams produced to illustrate the action. point to point, point to back, back to back. 3.5 Card rollers are described in terms of their function, operation, setting, and location on the card. feed, licker-in, swift, worker, stripper, fancy, peralta, doffer, tummer, condenser stripper, angle stripper, fly stripper, transfer roller, dickie roller. 3.6 Carded slubbing faults are described in terms of cause, significance, and corrective action. neps, fibre breakage, short and long term count unevenness, cross card variation, double ends, strength, slubs, contamination.

4 Page 4 of 5 Element 4 Demonstrate knowledge of card clothing used on a woollen card. 4.1 Card clothing used in woollen carding is described in terms of type, characteristics, and reasons for selection. type fillet, metallic; characteristics counts, crowns, gauge, wire angle, points, backs, foundation; reasons card performance, yarn quality. 4.2 Fettling process is described in terms of reasons for fettling and methods used. method hand, vacuum, degreasing metallic wire; reasons carding performance, product quality, contamination. 4.3 Card clothing procedures are described in terms of techniques used to apply woollen card clothing. fillet, metallic. 4.4 Card grinding is described in terms of function and operation. Element 5 Demonstrate knowledge of woollen spinning. 5.1 Woollen ring spinning machine sections and components are described in terms of function and operation. creel, drafting zone, cots, false twist, lappets, spindle, spindle crown, balloon ring, ring, traveller, spindle brake, waste collection, waste recycling. 5.2 Spinning actions are described in terms of the mechanism and factors that affect the action. draft, false twist, twist insertion, wind-on and package build. 5.3 Spinning faults are described in terms of cause, significance, and corrective action. uneven yarn, unlevel twist, contamination, double ends, incorrect piecenings.

5 Page 5 of 5 Element 6 Demonstrate knowledge of tests used in woollen yarn manufacturing. 6.1 Tests are described in terms of principles, method, and reason for each test. regain, extractable matter, slubbing and yarn count, count variation, cross card variation, twist level, twist direction, twist variation, spindle speed variation, yarn strength and elongation, yarn shade, slub definition. Please note Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards. Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards. Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements. Comments on this unit standard Please contact Competenz info@competenz.org.nz if you wish to suggest changes to the content of this unit standard.

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