Unit of competency Outline

Date retreived
23/07/2026 5:50 PM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Perform jewellery metal casting

Perform jewellery metal casting

Unit of competency
National Code
MEM19001B
State Code
W5645
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
01/12/2005
View on TGA
State Implementation and Classification
Approved Date
29/08/2014
Field of Education
030713 - Metal Casting And Patternmaking
Original Release Date
29/08/2014
Nominal Hours
54
Description
This unit covers casting jewellery primarily by the 'lost wax' method of investment casting.
Notes
Elements and Performance Criteria
1. Prepare metals for casting
  • 1.1. Metals and alloys are selected in appropriate proportions.
  • 1.2. Metals and alloys are weighed out correctly and in correct wax-to-metal ratios.
  • 1.3. Relevant data is recorded.
2. Conduct pre-casting operations
  • 2.1. Equipment is prepared according to standard operation procedures.
  • 2.2. Inert gas supply/delivery and vacuum systems are checked, if applicable.
  • 2.3. Preheating/glazing is carried out, if applicable.
  • 2.4. Temperature of invested flask is maintained.
3. Melt jewellery metal
  • 3.1. Protective coating is applied to jewellery metal as appropriate.
  • 3.2. Jewellery metal is heated.
  • 3.3. Jewellery metal casting temperature is achieved.
4. Cast metals
  • 4.1. Burn-out flask is positioned correctly.
  • 4.2. Molten metal is tapped.
  • 4.3. Allowance is made for adequate solidification time.
  • 4.4. Furnace is operated in accordance with work site procedures.
5. Perform post-casting operations
  • 5.1. Casting flask is removed and stored in a safe manner.
  • 5.2. Casting materials/consumables are cleaned/stored/disposed as appropriate.
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.
Metals and alloys
Gold, platinum, palladium, silver, copper, and their alloys
Equipment
Resistance/induction coils, and hand held torches fuelled by a variety of combinations of gas/propane/acetylene/air/oxygen
Protective coating
Protective coatings may include borax, fluxes and inert gases
EVIDENCE GUIDE
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 cast jewellery items using investment, vacuum/centrifugal casting procedures. 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
This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.
This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with jewellery metal casting 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, supervisor's 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
Replaced By
State Code National Code Title Type
OAU30 MEM19001 Perform jewellery metal casting Unit of competency