Profession blow moulding machine operator

Blow moulding machine operators operate and monitor blow moulding machine to mould plastic goods, according to requirements. They regulate temperature, air pressure and volume of plastic, according to specifications. Blow moulding machine operators remove finished products and cut away excess material, using a knife. They regrind surplus material and rejected workpieces for reuse, using a grinding machine.

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Personality Type

  • Realistic / Conventional
  • Realistic / Investigative


  • Blow moulding

    The three main techniques to create hollow plastic and glass parts, namely extrusion blow molding, injection blow molding and injection stretch blow molding.

  • Blow moulding machine parts

    Parts of the machine that produces plastic products such as bottles by injecting air under high pressure into heated preforms placed into moulds, such as the hopper, the extruder, the die head and the mould.

  • Plastic resins

    The process of heating hydrocarbons, forming and combining polymers to create plastic resins which are used to make different kinds of products.


  • 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.

  • Use personal protection equipment

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

  • Tend blow moulding machine

    Monitor, set-up and adjust the blow moulding machine controls and mandrel using the control panel or handtools in order to mould plastic products according to specifications.

  • Trim excess material

    Trim surplus material of fabric such as fiberglass mats, cloth, plastics or rubber.

Optional knowledge and skills

clean moulds mix moulding and casting material perform test run add colour keep records of work progress select mould types feed hoppers types of moulding operate lifting equipment inspect quality of products finish plastic products maintain equipment extract products from moulds assemble moulds grind wasted plastic mechanics maintain moulds manage waste tend injection moulding machine report defective manufacturing materials