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
ALL TOOL STEEL FOR BLOW MOULDING
- Alumec 89
- Uddeholm Caldie
- Uddeholm Calmax
- Uddeholm Corrax
- Uddeholm Dievar
- Uddeholm Impax Supreme
- Uddeholm Mirrax 40
- Uddeholm Mirrax ESR
- Uddeholm Nimax
- Uddeholm Nimax ESR
- Uddeholm Orvar 2 Microdized
- Uddeholm Orvar Supreme
- Uddeholm QRO 90 Supreme
- Uddeholm Ramax HH
- Uddeholm Sleipner
- Uddeholm Stavax ESR
- Uddeholm Sverker 21
- Uddeholm Unimax
- Uddeholm Vanadis 23 SuperClean
- Uddeholm Vanadis 30 SuperClean
- Uddeholm Vanadis 60 SuperClean
- Uddeholm Vanadis 8 SuperClean
- Uddeholm Vancron SuperClean
- Uddeholm Vidar 1 ESR