Profession compression moulding machine operator

Compression moulding machine operators set up and operate machines to mould plastic products, according to requirements. They select and install dies on press. Compression moulding machine operators weigh the amount of premixed compound needed and pour it into the die well. They regulate the temperature of dies.

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Personality Type

  • Realistic / Conventional
  • Realistic / Investigative


  • Compression moulding machine parts

    Parts of the machine that apply pressure on the usually preheated moudling material to force it into contact with the mould area such as the upper movable mould part, the lower fixed mould part and the ejector pin.

  • Types of plastic

    Types of plastic materials and their chemical composition, physical properties, possible issues and usage cases.


  • Measure materials

    Measure the raw materials prior to their loading in the mixer or in machines, ensuring they conform with the specifications.

  • Move levers

    Move levers in order to facilitate the tile or pipe cutting or to adjust the automatic oilers.

  • Dump batches

    Dump the batches into conveyors making sure the specifications such as the mixing time are followed.

  • Optimise production processes parameters

    Optimise and maintain the parameters of the production process such as flow, temperature or pressure.

  • Use personal protection equipment

    Make use of protection equipment according to training, instruction and manuals. Inspect the equipment and use it consistently.

  • Extract products from moulds

    Remove finished products from moulds and examine them in detail for anomalies.

  • Install press dies

    Install and coat dies on presses by using handtools, bolts and clamps.

  • Manipulate plastic

    Manipulate the properties, shape and size of plastic.

  • Tend compression moulding machine

    Tend the compression machine used to mould plastic and other powder products such as copper, graphite or carbon.

  • Monitor valves

    Monitor and accordingly adjust the valves in order to allow a specific amount of liquids (such as ammonia sulfuric acid or viscous soap) or steam into the mixer or machine.

Optional knowledge and skills

monitor environmental parameters assemble moulds finish plastic products mix moulding and casting material clean moulds monitor automated machines maintain equipment graphite manufacturing of sports equipment maintain plastic machinery adjust curing ovens add colour feed hoppers maintain mould parts keep records of work progress plastic welding perform test run mechanics report defective manufacturing materials construct moulds perform loading and unloading operations manufacturing of daily use goods inspect quality of products set up the controller of a machine