Elements and Performance Criteria
- Prepare to gravity cast polyurethane materials.
- Interpret materials specifications.
- Identify required materials, including additives and curative.
- Identify required equipment, including handling, control and material preparation equipment.
- Identify materials and process hazards and plan for their elimination.
- Locate and make ready appropriate safety equipment.
- Plan gravity casting operations.
- Confirm product and process parameters.
- Ensure environmental controls are valid and in place according to procedures.
- Identify product to be made and calculate quantity of material required to produce product of correct shape and physical dimensions.
- Determine product colour and obtain appropriate agents.
- Plan the sequence of events from availability of the material to stripping of the final product.
- Identify appropriate measures to minimise risks from identified hazards.
- Set up and check gravity casting equipment.
- Set up equipment following procedures and confirm these are within recommended specifications.
- Check time, de-gasser, temperature and allowable adjustments for conformity to documented procedures.
- Check moulds for conformity with customer order and workplace operational requirements.
- Report and discard or make adjustments for non-conforming materials in accordance with procedures.
- Obtain appropriate mould coating and releasing agents.
- Conduct gravity casting operations.
- Follow planned sequence and workplace procedures.
- Ensure equipment operating temperatures and times are within specification.
- Pour materials at the appropriate rate per minute and quantity using techniques to minimise air entrapment and aeration.
- Check product quality, including thickness, weight and product integrity, against specifications.
- Make adjustments to gravity casting equipment to remedy product non-conformity where applicable.
- Produce required quantity of product, check for quality and place in holding areas.
- Deal with material waste and scrap in accordance with workplace procedures.
- Clean up equipment, store lubricants and manage waste in accordance with procedures.
- Anticipate and solve problems
- Recognise a problem or a potential problem.
- Determine problems needing priority action.
- Refer problems outside area of responsibility to appropriate person, with possible causes.
- Seek information and assistance as required to solve problems.
- Solve problems within area of responsibility.
- Follow through items initiated until final resolution has occurred.