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Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Inspect and prepare patterns and cores
   • Patterns or cores are inspected for appropriate surface finish and set up on jointline or flat board to specification.
   • Appropriate parting agent is selected and applied to polymer specifications.
2. Manufacture moulds, patterns, tooling aids etc.
   • Appropriate polymer materials are selected to specification.
   • Polymer and hardener are mixed to correct ratios and specifications using standard safety and operating procedures.
   • Polymer is applied to specification and using predetermined methods, ensuring that air is not entrapped in application, excessive heat is not generated and delamination does not occur in final use.
   • Pattern/core box is stripped, inspected, cleaned and repaired as required.
   • Faces of polymer pattern are machined and finished to specifications.
   • Appropriate method of location is applied to patterns and core boxes.
   • Polymer tooling is checked for conformance to specifications as required.

Required Skills

Required skills

Look for evidence that confirms skills in reading interpreting and following information on written job instructions specifications standard operating procedures charts lists drawings and other applicable reference documents undertaking numerical operations geometry and calculationsformulae within the scope of this unit including determination of contraction rates measuring polymer materials interpreting written instructions sketches and drawings making master patterns machining patternscore boxes and tooling aids sealing the patterns or cores with appropriate surface finish alignment of pattern to core box setting up with necessary locations applying the parting agents selecting polymers preparing polymer and hardener applying polymer coating releasing patterns and moulds cleaning patterns and moulds

Required knowledge

Look for evidence that confirms knowledge of machining for pattern making parting agents safe working procedures methods of locating patterns and core boxes the range of surface finishes range of polymers and their applications mixing ratios and calculations characteristics of polymer under exothermic reaction exothermic control procedures methods of stripping pattern checking techniques use and application of personal protective equipment safe work practices and procedures hazards and control measures associated with producing polymer patterns

Evidence Required

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria required skills and knowledge range statement and the Assessment Guidelines for the Training Package
Overview of assessment	A person who demonstrates competency in this unit must be able to produce polymer patterns Competency in this unit cannot be claimed until all prerequisites have been satisfied
Critical aspects for assessment and evidence required to demonstrate competency in this unit	Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria including required knowledge and be capable of applying the competency in new and different situations and contexts
Context of and specific resources for assessment	Assessors should gather a range of evidence that is valid sufficient current and authentic Evidence can be gathered through a variety of ways including direct observation supervisors reports project work samples and questioning Questioning techniques should not require language literacy and numeracy skills beyond those required in this unit of competency The candidate must have access to all tools equipment materials and documentation required The candidate must be permitted to refer to any relevant workplace procedures product and manufacturing specifications codes standards manuals and reference materials This unit could be assessed in conjunction with any other units addressing the safety quality communication materials handling recording and reporting associated with producing polymer patterns or other units requiring the exercise of the skills and knowledge covered by this unit
Method of assessment	Assessors should gather a range of evidence that is valid sufficient current and authentic Evidence can be gathered through a variety of ways including direct observation supervisors reports project work samples and questioning Questioning techniques should not require language literacy and numeracy skills beyond those required in this unit of competency The candidate must have access to all tools equipment materials and documentation required The candidate must be permitted to refer to any relevant workplace procedures product and manufacturing specifications codes standards manuals and reference materials
Guidance information for assessment

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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. Bold italicised wording, if used in the performance criteria, is detailed below. 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) may also be included.
Surface finish	Texture, gel coat, aluminium fill
Parting agent	Wax, PVA
Polymer materials	Epoxy resins, urethane
Method of location	Male and female joint, pin and bush

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