Blow moulding

    Blow moulding is a process for shaping thermoplastic into a hollow product. A hot thermoplastic tube is stretched with air pressure and cooled against a mould surface.

    Mould material requirements

    Blow moulding is a low pressure method where strength and wear demands are very moderate. Some parts of the mould, like shot off areas and/or neck ring, may require higher strength material. PVC is a common material for bottles and may cause corrosion problems. Blow moulding is a very high productivity method why cycle times are of great importance. The most common material to use in blow moulds is aluminium alloys, with inserts of higher hardness materials. Steel is also used and in some cases even in the soft annealed condition.

    Mould material properties

    Important properties are:

    • Moderate strength demands
    • Corrosion resistance
    • Heat conductivity
    Uddeholm Plastic Moulding Applications - Blow Moulding

    All tool steel for Blow moulding

    Alumec 89
    Uddeholm Coolmould
    Uddeholm Corrax
    Uddeholm Impax Supreme
    Uddeholm Mirrax 40
    Uddeholm Mirrax ESR
    Uddeholm Nimax
    Uddeholm Nimax ESR
    Uddeholm Ramax HH
    Uddeholm Stavax ESR
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