15208 version 5
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Set and run the injection stretch-blow moulding production process
Level
2
Credits
9
Purpose
People credited with this unit standard are able to: demonstrate knowledge of
the operation of injection stretch-blow moulding equipment; set, control and
monitor the production process for a repeat run; perform a material or colour
changeover on the moulding equipment; and identify, correct and report
routine product moulding faults.
Subfield
Plastics Processing Technology
Domain
Injection Stretch-Blow Moulding
Status
Registered
Status date
18 September 2009
Date version published
18 September 2009
Planned review date
31 December 2013
Entry information
Recommended: Unit 15207, Operate injection stretchblow moulding equipment; Unit 23130, Classify and
name plastics materials; or demonstrate equivalent
knowledge and skills.
Accreditation
Evaluation of documentation by NZQA and industry.
Standard setting body (SSB)
Competenz
Accreditation and Moderation Action Plan (AMAP) reference
0134
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
This unit standard applies to either single stage or two stage injection stretch-blow
moulding processes.
2
All work practices must meet enterprise health and safety requirements.
 New Zealand Qualifications Authority 2016
15208 version 5
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3
Definitions
Enterprise means an organisation where training and/or assessment is taking place,
and/or where the trainee is employed.
Enterprise procedure is defined as actions which comply with the policies, systems,
and directives in a particular enterprise. Enterprise procedure must comply with the
requirements of the Health and Safety in Employment Act 1992, and subsequent
amendments.
Elements and performance criteria
Element 1
Demonstrate knowledge of the operation of injection stretch-blow moulding equipment.
Performance criteria
1.1
The principles and advantages of injection stretch-blow moulding processes are
compared.
Range
1.2
The construction and operation of enterprise injection stretch-blow moulding
machine components are described.
Range
1.3
advantages – cost of production, process control;
injection stretch-blow moulding processes – single stage, two
stage.
construction and operation – evidence is required for fundamental
characteristics only;
components include – controls, preform mould clamping unit,
injection unit, preform transport unit, bottle blowing unit, power
unit, preform conditioning unit, product ejection.
The enterprise injection stretch-blow moulding operation cycles are described,
and their inter-relationship is explained.
Range
operation cycles – injection cycle, handling cycle, blow cycle;
inter-relationship includes – sequence, duration, temperature,
pressure, speed.
Element 2
Set, control and monitor the production process for a repeat run.
Performance criteria
2.1
Machine setting information is interpreted, and the injection stretch-blow
moulding equipment and production line are set in accordance with enterprise
procedure.
Range
production line may include – conveyors, palletisers, labellers,
wrappers, strappers, carton erectors.
 New Zealand Qualifications Authority 2016
15208 version 5
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2.2
Controls are adjusted according to standard setting sheet in accordance with
enterprise requirements.
2.3
Equipment settings are monitored and reported in accordance with enterprise
procedures.
2.4
Common injection stretch-blow moulding equipment malfunctions are identified,
corrected, and reported in accordance with enterprise procedure.
Range
equipment malfunctions include – low barrel temperatures, overriding barrel temperatures, leaking nozzle, dryer temperature
faults, hydraulic oil temperatures, air pressure fluctuations, power
failure.
Element 3
Perform a material or colour changeover on the moulding equipment.
Performance criteria
3.1
Purging is performed in accordance with enterprise procedure.
3.2
Raw material and additives are selected to comply with job specification.
3.3
Equipment is cleaned of all previous materials, and is reloaded with the
selected raw material in accordance with enterprise procedure.
3.4
Equipment is run with new material and monitored to meet job specifications.
Element 4
Identify, correct and report routine product moulding faults.
Performance criteria
4.1
Routine preform moulding faults are identified, corrected and reported in
accordance with enterprise procedure.
Range
4.2
routine preform moulding faults – contamination, short shots, gate
stringing, flash, bubbles, crystallinity, gate voids.
Routine container blowing faults are identified, corrected and reported in
accordance with enterprise procedure.
Range
routine container blowing faults may include but are not limited to
– pearlescence, off-centre gate, base holes, ringnecks, product
not formed, stepped feet.
 New Zealand Qualifications Authority 2016
15208 version 5
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Please note
Providers must be accredited by the Qualifications Authority, 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 the Qualifications Authority 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.
 New Zealand Qualifications Authority 2016