TECHNOLOGY | PACKAGING
and mould wear. Injection compression moulding was used for this, because it requires a much lower injection pressure and can work with mould tempera- tures of 20C rather than 12C. The special ‘Next Cycle
Above: Netstal demonstrated moulding of a 15g thin-wall cup made from 100% PET
IML’ label can be separated from the PP of the cup during recycling, so the product can be easily recycled after use. In contrast to thermoforming,
no pre-produced foils are used and no stamping waste is produced, says the company.
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At the same event, Netstal demonstrated the moulding of a thin-wall cup – made from 100% PET – on a hybrid Elion 3200 machine. The clear cup weighs around 15g and has a filling volume of 450ml. Netstal processed virgin PET from Eastman. The cups were returned to the PET cycle via the NPE recycling programme. Labels for the cups were also made of PET and provided by Belgian IML specialist MCC Verstraete. The test mould with two cavities and the IML robot – which inserts the label into the cavity and removes and stacks the finished cups – were supplied by Canadian partner StackTeck. The PET cup was mould- ed in a cycle time of around 4 seconds on an Elion 3200, which has the necessary speed, performance and dynamics with its electric toggle clamping unit and hybrid injection unit. In high-speed applications, it operates in efficiency classes 8 and higher of the latest Euromap 60.1 standard. In addition, visitors saw a live demo of closures production, using a produc- tion system from US cus- tomer Alltrista. The 26mm water closures were pro- duced in a mould with 128 cavities. The system ran with a cycle time of 1.9 seconds. The focus of the high- performance application was a CAP-Line with a clamping force of 4500kN. With the line, Netstal now
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IMAGE: NETSTAL
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