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Elements and Performance Criteria

1. Check work requirements.
   • Identify work requirements from production plan or request.
   • Check product, materials and equipment meet requirements for job(s).
   • Recognise requirements which may not be in accordance with usual practice.
   • Ask questions of appropriate person to confirm unusual practice.
   • Ensure housekeeping is to requirements.
   • Identify hazards associated with the job and take appropriate action.
   • Perform other pre-operational checks in accordance with procedures.
2. Operate injection moulding equipment to procedures.
   • Check process is operating within required limits.
   • Check product is in specification and to required quality standard.
   • Ensure product is consistently ready for next operation.
   • Maintain supply of material(s) as required.
   • Complete logs and records as required.
   • Collect and segregate scrap, trim and other materials as required.
   • Keep equipment and work area clean .
   • Pause machine cycle and perform emergency stop, as required.
3. Respond to routine problems to procedures.
   • Recognise known faults that occur during the operation.
   • Identify and take action on causes of routine faults.
   • Log problems as required.
   • Identify non-routine process and quality problems and take appropriate action.

Required Skills

This describes the essential skills and knowledge and their level required for this unit

Application of an operational knowledge of the materials equipment and process sufficient to recognise out of specification products process problems and materials faults For example if all products are suddenly short underfilled for several cycles and getting shorter this could mean that there is insufficient polymer flow which could be due to a broken heater band etc The heater bands would all be checked to ensure proper functioning

Knowledge of the enterprises procedures and relevant regulatory requirements along with the ability to implement them within appropriate time constraints and work standards For example when monitoring process conditions action must only be taken if the cushion varies by more than say mm

Application of the knowledge of managing risks using the hierarchy of controls applied to the injection moulding process Application of approved hazard control safety procedures and the use of PPE in relation to handling materials equipment operation and cleanup

Knowledge of and skills in the operation of injection moulding equipment and main components sufficient for consistent production of quality products including

production workflow sequences and materials demand

the reasons for checking process control panels and reporting readings which are outside of normal range of process variability

accurately monitoring equipment operation and product quality

the potential effects of variations in raw materials and equipment operation in relation to quality of product

processing behaviour of polymers and the role of additives

waste management and knowing the importance of reusing nonconforming products wherever possible

correct selection and use of equipment materials processes and procedures

explain the effect of unauthorised or emergency shutdown in relation to safety and production requirements

identify factors which may affect product quality or production output and appropriate remedies

Competence also includes the ability to

plan own work including predicting consequences and identifying improvements

identify when the operator is able to rectify faults when assistance is required and who is the appropriate source for assistance

identify and describe own role and role of others involved directly in the injection moulding process

Language literacy and numeracy requirements

This unit requires the ability to read and interpret typical product specifications job sheets procedures basic machine control panels material labels and safety information as provided to operators

Writing is required to the level of completing workplace forms

Basic numeracy is required eg to determine that two kg bags are needed to make up a requirement for kg

Evidence Required

The Evidence Guide provides advice on assessment and must be read in conjunction with the Performance Criteria required skills and knowledge the Range Statement and the Assessment Guidelines for this Training Package

Overview of assessment

A holistic approach should be taken to the assessment

Assessors must be satisfied that the person can consistently perform the unit as a whole as defined by the Elements Performance Criteria and skills and knowledge

Critical aspects for assessment and evidence required to demonstrate competency in this unit

It is essential that competence is demonstrated in the knowledge and skills defined in this unit These may include the ability to

apply the required skills and knowledge to operate an injection moulding machine

apply approved procedures

Consistent performance should be demonstrated For example look to see that injection moulding production standards are met consistently

Assessment method and context

Assessment will occur on an industrial injection moulding machines equipment and will be undertaken in a worklike environment

Competence in this unit may be assessed

on a processing plant allowing for operation under all normal and a range of abnormal conditions

in a situation allowing for the generation of evidence of the ability to respond to problems

by using a suitable simulation andor a range of case studiesscenarios

through a combination of these techniques

In all cases it is expected that practical assessment will be combined with targeted questioning to assess the underpinning knowledge and theoretical assessment will be combined with appropriate practicalsimulation or similar assessment Assessors need to be aware of any cultural issues that may affect responses to questions

Assessment processes and techniques must be culturally appropriate and appropriate to the oracy language and literacy capacity of the assessee and the work being performed

Specific resources for assessment

This section should be read in conjunction with the Range Statement for this unit of competency Resources required include suitable access to an operating plant or equipment that allows for appropriate and realistic simulation A bank of case studiesscenarios and questions will also be required to the extent they form part of the assessment method Questioning may take place either in the workplace or in an adjacent quiet facility such as an office or lunchroom No other special resources are required

Access must be provided to appropriate learning andor assessment support when required Where applicable physical resources should include equipment modified for people with disabilities

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Range Statement

The Range Statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts.

Where reference is made to industry codes of practice, and/or Australian/international standards, the latest version must be used.

Context

This competency applies to all injection moulding operations within the plastics and rubber sectors. It includes the operation of all relevant additional equipment where that equipment is integral to the injection moulding process.

Procedures

All operations are performed in accordance with procedures.

Procedures include all relevant workplace procedures, work instructions, temporary instructions and relevant industry and government codes and standards.

Tools and equipment

This unit of competency includes use of equipment and tools such as:

injection moulding machines (such as electrical, mechanical, electromechanical and hydraulic)

components of injection moulding machines (such as base, material supply systems, barrel and screw plastification unit, injection units)

dies/tools (such as pneumatic, or hydraulic actuation of cores, slides ejector systems)

ancillary equipment (such as chillers, die heating equipment, hopper driers, mixing hoppers, dehumidifying driers, air compressors, dosing machines, blending and mixing equipment and conveyors where they are integral to the operation of the injection moulder)

hand tools used in the injection moulding process

material loading equipment used for loading of raw materials

relevant personal protective equipment.

Hazards

Typical hazards include:

spills

dusts/vapours

slip and fall (such as due to spilt granules)

temperature (such as due to heated barrel, nozzle and hot runner moulds)

hazardous substances (including decomposing polymer during start up and shut down)

moving equipment (such as moving moulds, robots and ancillary equipment)

manual handling hazards.

Problems

'Respond to routine problems' means 'apply known solutions to a limited range of predictable problems'. Typical process problems may include:

equipment malfunction

variations in cycle time, temperature, pressure, speed

variations in materials or contamination of materials

die/tooling problems such as damage to die.

Typical product problems may include routine injection moulding faults such as:

short mouldings

flash

sink marks

voids

burn marks

splay/splash marks/silver streaking

blistering

flow marks

poor surface finish

weld lines

poor colour dispersion

colour contamination

black spots

ejection damage.

Appropriate action for non-routine problems may be reporting to designated person or other action specified in the procedures.

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