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Elements and Performance Criteria
Required Skills
Evidence Required
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. Add any 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.Where reference is made to industry codes of practice, and/or Australian/international standards, the latest version must be used.ContextThis competency applies to the operation of open mill equipment in the plastics and rubber sectors. It includes the operation of all relevant additional equipment where that equipment is integral to the process.While primarily intended for the mixing of rubber compounds using an open mill it may also apply to the mixing of plastics or other materials and may apply where mixing and blending is incidental to the operation such as slabbing of striping.ProceduresAll operations are performed in accordance with procedures.Procedures include all relevant workplace procedures, work instructions, temporary instructions and relevant industry and government codes and standards. Tools and equipmentThis competency includes use of equipment and tools such as:open mill and its major components hand tools used in the process, eg mill knivesmaterial loading equipment used for loading of raw materials, eg stock loaders and conveyors, overhead crane arms and hooks relevant personal protective equipment.HazardsTypical hazards include:nip hazardscut hazardsdusts/vapours slip and fall (such as caused by scrap of spilled materials)temperature(such as hot rubber)hazardous materials (including curatives and accelerators, plasticisers, fillers)manual handling hazards. Problems'Anticipate and solve problems' means resolve a wide range of routine and non-routine problems, using product and process knowledge to develop solutions to problems which do not have a known solution/a solution recorded in the procedures..Typical process problems may include:power failuresincorrect machine adjustments incorrect quantities of materialsincorrect blending times equipment breakdownsworn rollsshort scorch products forming the initial bandadjusting bank size for efficient mixing.Typical product problems many include:variations in materials contamination of materialslack of a homogeneous product.Appropriate action for problems outside of area of responsibility may be reporting to an appropriate person.Appropriate action for solving problems within area of responsibility includes asking questions and seeking assistance from appropriate persons/sources.VariablesKey variables to be monitored include:temperatures speed (including difference in speed between rolls)nip pressures colourcycle time/process timing product/stock/material flow and quality product weight and output rateproduct integrity and general conformance to specification and quality sample.