2449 version 6
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Scour wool
Level
4
Credits
50
Purpose
This unit standard is for people working in the wool scouring industry. People
credited with this unit standard are able to prepare and use wool scouring
equipment to scour wool, identify problems in the operation of the equipment,
produce product to the required quality, carry out minor maintenance and
maintain records as required.
Subfield
Textiles Manufacture
Domain
Wool Scouring
Status
Registered
Status date
25 January 1995
Date version published
25 June 2007
Planned review date
31 December 2010
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0030
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
All activities will be carried out in accordance with the Health and Safety in Employment
Act 1992.
 New Zealand Qualifications Authority 2016
2449 version 6
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Elements and performance criteria
Element 1
Demonstrate knowledge of scouring plant.
Performance criteria
1.1
Operating sections of scour are identified and their function described.
Range
scour feeding system, feed hopper, opener, weighbelt, bowls,
squeeze press, dryer.
1.2
Scour parts and scouring activities that are dangerous are identified and
precautions to avoid them are described.
1.3
Safety and emergency procedures are demonstrated according to workplace
and Occupational Safety and Health (OSH) requirements.
Element 2
Prepare scour for operation according to work instructions.
Performance criteria
2.1
Bowls are prepared for scouring according to workplace procedure and work
instructions.
Range
bowl water level, bowl temperature, circulation pumps, discharge.
2.2
Detergent supply and metering devices/pumps are set according to work
instruction.
2.3
Chemicals are added according to work instructions and safety requirements.
Range
manual, metering devices.
2.4
Feed section is set to deliver wool throughput according to work instructions.
2.5
Dryer is checked and set according to work instructions.
2.6
Guards and other safety equipment are in place according to workplace and
OSH requirement.
 New Zealand Qualifications Authority 2016
2449 version 6
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Element 3
Start scour and scour wool.
Performance criteria
3.1
Scour sections are started in sequence according to workplace procedure.
Range
3.2
feed section, hoppers, openers and weighbelt, bowls, dryer,
opening and dusting.
Scour conditions are monitored and adjustments made to operating conditions
to meet quality and productivity targets.
Range
squeeze roller pressure and lapping, flowdown, rake and fork
speeds, liquor condition, bowl temperatures, feed rate, scoured
wool colour.
3.3
Detergent/chemical additions are checked to ensure that addition rates required
by workplace operating procedures and work instructions are maintained.
3.4
Regain of wool is monitored and tested according to work instructions.
3.5
Grease levels are monitored and tested according to work instructions.
3.6
Mechanical operation of equipment is checked regularly to identify malfunctions.
Range
pumps, valves, rakes, squeeze press, hopper feed sheets, dryer,
opening/dusting.
Element 4
Identify, report and isolate variations in product.
Range
colour, entanglement, grease content, moisture content, brightness.
Performance criteria
4.1
Types of variation in product quality that can occur in scouring are identified and
causes described.
4.2
Variation in product quality is recognised during processing, steps are taken to
isolate affected product and reported according to workplace practice.
4.3
All contaminants, and scoured wool that does not meet quality requirements,
are recognised and removed.
 New Zealand Qualifications Authority 2016
2449 version 6
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Element 5
Stop and shut down scour.
Performance criteria
5.1
Scour sections are stopped in sequence according to workplace procedure.
Range
5.2
feed section, pumps and chemical addition, rakes, squeeze
presses, dryer, opening and dusting.
Scour and scour area are cleaned according to workplace practice.
Range
bowls, surrounding area, opener and duster screens.
Element 6
Act on machine malfunctions and blockages.
Performance criteria
6.1
Interruptions to wool flow are identified and their cause located.
Range
feed hopper, opener, squeeze press, dryer, opening/dusting.
6.2
Blockages are cleared quickly and according to operating procedures.
6.3
Machine malfunctions that are within ability and responsibility are fixed to
standard required by workplace operating procedures.
6.4
Machine malfunctions that are not within ability and responsibility of operator to
fix are reported according to workplace operating procedures.
6.5
Maintenance procedures are carried out according to workplace practice.
Element 7
Take scoured wool samples.
Performance criteria
7.1
Samples are drawn from production according to workplace practice.
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.
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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.
 New Zealand Qualifications Authority 2016