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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. Determine job requirements
   • Follow standard operating procedures (SOPs)
2. Comply with work health and safety (WHS) requirements at all times
3. Use appropriate personal protective equipment (PPE) in accordance with SOPs
4. Identify job requirements from specifications, drawings, job sheets or work instructions
5. Interpret die drawing and die specifications relevant to die trial
   • Identify regulatory requirements and risk management requirements associated with extruder operation and die handling
6. Identify layout and pre-forming of die apertures
7. Identify bearing and pocket design/specification
8. Identify measurements and tolerances for bearings, die components and die support system
9. Identify bolster and spacer specification for die
10. Identify press specifications
11. Identify speed estimate for die
12. Identify ports and bridges for hollow dies
13. Liaise with die designer
    • Clarify die drawing and die specifications with die designer where design information is not clear
14. Determine if die requires finishing off and clarify final design measurements, tolerances and speed specifications
15. Obtain any special instructions from die designer for conduct of test extrusions
16. Finish off die, if required
    • Finish lands and bearings to specified tolerances
17. Finish ports, bridges and mandrels of hollow dies, if required
18. Undertake any final polishing
19. Confirm all measurements are to design specification after finishing off
20. Analyse trial extrusions
    • Check extruder and surrounds for compliance with operation safety requirements
21. Operate or supervise operation of extrusion press to produce trial extrusions
22. Check hot extrusions for shape distortion
23. Check thickness of extrusions are to specification
24. Check surface finish of extrusions
25. Identify whether faults apply from the start to the end of the run-out of the extrusions
26. Conduct additional trial extrusions to confirm extrusion faults occur consistently
27. Record extruder settings for each trial extrusion
28. Identify appropriate remedy for out-of-specification results
    • Examine faulty extrusions and determine if fault relates to die design, incorrect process or temperature settings, or faulty die support system
29. Determine fault is die related and able to be eliminated through correction of die
30. Determine if fault can be corrected through adjustments to die supports
31. Determine if fault can be eliminated through adjusted process control or billet heating
32. Recommend either return of die for re-design or manufacture of a new die where faults are unable to be corrected
33. Re-test die after correction
    • Conduct trial extrusions after correction of die, die support adjustment or process or temperature adjustment
34. Return die to die manufacturer if faulty extrusions persist
35. Record adjustments to die on die design drawings ensuring correct feedback codes are used
36. Record adjustments made to die support system, process and temperature settings