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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. Correct solid dies
   • Calculate intended change in extrusion flow or speed
   • Determine bearing choke angles or length of bearing shortening as appropriate for required correction
   • Speed up flow through appropriate shortening of bearing
   • Slow down flow through appropriate choking of bearing
   • Relieve clearances
   • Supervise or run trial extrusions to test corrections
2. Correct hollow dies
   • Assess if shortening or choking of mandrel bearings is required and select bearings to be corrected
   • Determine choke angles and length of shortening as appropriate for required corrections
   • Undercut mandrel to widen chambers
   • Increase depth of chamber back into bridge
   • Adjust mandrel stems
   • Adjust weld bridges
   • Speed up flow through appropriate shortening of bearing
   • Slow down flow through appropriate choking of bearing
3. Maintain die records
   • Record details of all die corrections, including trial extrusions
   • Recommend any simple die design changes that increase productivity and recovery
4. Determine job requirements
   • Follow standard operating procedures (SOPs)
5. Comply with work health and safety (WHS) requirements at all times
6. Use appropriate personal protective equipment (PPE) in accordance with SOPs
7. Identify job requirements from specifications, drawings, job sheets or work instructions
8. Prepare for die correction
   • Identify regulatory requirements and risk management procedures relevant to die access and handling, extruder operation and die correcting procedures
9. Identify extrusion specifications, extruder operating procedures and other information relevant to die correction task
10. Consult with die designer on intended correction, where required
11. Select appropriate hand tools, hand held power tools, or workshop machines to carry out die corrections
    • Calculate intended change in extrusion flow or speed
12. Determine bearing choke angles or length of bearing shortening as appropriate for required correction
13. Speed up flow through appropriate shortening of bearing
14. Slow down flow through appropriate choking of bearing
15. Supervise or run trial extrusions to test corrections
    • Assess if shortening or choking of mandrel bearings is required and select bearings to be corrected
16. Determine choke angles and length of shortening as appropriate for required corrections
17. Undercut mandrel to widen chambers
18. Increase depth of chamber back into bridge
19. Undertake basic maintenance of dies
    • Monitor case and assess when re-nitriding is required
20. Prepare die for re-nitriding
21. Repair fine bearing damage
22. Maintain bearing angle and flatness during polishing and repairs
23. Monitor fittings and devices for lifting die and die support components and arrange replacement or repair as necessary
24. Adjust die support system and components
    • Ensure toolstack components are flat and square with die and specified toolstack dimensions that will support dies, according to the force the extruder can exert are used
25. Check for and replace any coined bolsters
26. Check die slide alignment is within tolerance and re-align if necessary
27. Report persistent die support related faults after adjustment and recommend redesign or stiffening as appropriate
    • Record details of all die corrections, including trial extrusions
28. Recommend any simple die design changes that increase productivity and recovery