Simulated workplaceCAQA Polyform Plastics and Cable is a fictional business created by CAQA for training and assessment. It is not a real company and no person, client or record here is real.About this simulation
PMBCAQA PolyformSimulated workplace
Simulated workplace
Scenario · Rubber and Belting

Mix an NR-45 compound batch and calender lining sheet

You are a rubber compounder at the Wingfield works.

Intermediate3 to 5 hours8 tasks
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The situation

What has happened

Bassline Irrigation Systems needs 120 kilograms of NR-45 natural rubber compound mixed and calendered into 3 millimetre lining sheet. The open mill was tagged out last week when its trip cable was found slack and it has now been adjusted and retested, but the tag must be checked before use. A recent SBR batch was dropped above its dump temperature and accepted only with concession, so the technical team is watching mixer temperatures. Curatives must be weighed and held apart, extraction must be running and the rheometer must confirm the batch before it is released to stock and calendered.

Your brief. Weigh, mix, finish, test and release a batch of NR-45 to the Rubber Compound Mixing Procedure with full lot traceability, confirm the mill is safe to use, then calender the compound into 3 millimetre sheet with thickness checks recorded, and update the stock and job card records.
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Tasks

Deliverables

  • Pre-use checks and mill trip test record
  • Completed batch card with weights and lot numbers
  • Rheometer result and release decision
  • Stock release and chemical register update
  • Calender thickness records and completed job card

Documents to use

Systems to use

Raw Materials and Compounds Stock

Keeps the stock record for resins, masterbatch, copper rod, rubber ingredients, compounds and chemicals with lot numbers, quantities and locations.

WHS Incident and Hazard Register

Records injuries, near misses, hazards, chemical events, burns and property damage at all sites and on customer sites with investigation and actions.

Production Job Cards

Tracks every production, trial and site service job from release through setup, first-off approval, running, inspection and packing.

Quality Nonconformance Register

Records nonconforming product, process deviations, cable test failures and customer complaints with disposition and corrective action.

For trainers and assessors

Units of competency

Current on training.gov.au for the Plastics, Rubber and Cablemaking as at 10 September 2026.

PMBPROD253EOperate an internal mill blender
PMBPROD254EOperate an open mill blender
PMBPREP206EPrepare polymer materials to specified formulae
PMBPROD352EProduce compounded materials
PMBPROD207EOperate rubber calendering equipment

Qualifications

PMB30121Certificate III in Polymer Processing
Assessor notes

What to look for

Evidence guide

Look for the mill trip test recorded before use, weights within tolerance with lot numbers, curatives kept separate, a clear statement of the dump temperature and the response to overheating, and the rheometer result driving the release decision. Hand position at the mill nip must be stated. Stock and chemical register records must reconcile with the batch card.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.