news | Arburg technology days
markets, accounting together for as much as 55% of its total business. However, he said the machinery firm had also made considerable progress in build- ing up its position in the thin wall packaging sector, which it began to target more robustly around four years ago. Arburg had previously focused its packaging industry efforts largely on closure-type applications.
Packaging ambition “We knew we had some strong competitors out there but we knew we had a reputation for solid, high technology machines and knew that could be extended to packaging,” said Heinson. “In the last year our packaging applications have risen. We are happy with that but we have not yet reached the levels we have in other sectors.” During the Technology Days
the company demonstrated two high performance packaging applications based on the special ‘P’ packaging
versions of its all-electric Alldrive and hybrid Hidrive ma- chine designs. These feature a modified tiebar and clamp opening stroke, servo-electric toggle clamp units with energy recovery system, and larger capacity plasticising units offering injection speeds up to 500 mm/s. The first application used Cube mould technology from Foboha to manufacture a two-component flip-top closure on a full electric Allrounder 720A Alldrive packaging specification machine. The 4+4+4+4 mould was mounted on a servo-elec- tric Cube support fitted in the machine base with the second component applied via a moving injection unit. The PP closures weighed 22g and were moulded on an 11s cycle in two grades of PP from Formosa. Part removal was by a six-axis robot mounted on the rear of the machine. The second packaging
application was an IML production cell built around a
Two component closures produced on a Cube mould
180 tonne hybrid Allrounder 570H Hidrive producing PP food containers on a two-cavity mould from ATS on a cycle time of 4.5s. The 14g contain- ers were produced in a Moplen RP 2473 grade of PP from LyondellBasell. IML automa- tion was supplied by Sepro of France.
PP food containers produced on a HiDrive with IML 12 INJECTION WORLD | April 2013
Hybrid acceptance Arburg technical director Herbert Kraibuhler said the Hidrive machine design is extremely well suited to packaging applications. “Packaging, which is mostly thin wall injection moulding, requires short cycle times. The technology in the hybrid machine gives very precise movements and very fast injec- tion speeds. And in the packaging industry the hybrid hydraulic machine is an accepted solution,” he said. Medical industry exhibits included production of the polycarbonate bottom layer of a ‘lab on a chip’ micro-fluidic diagnostics system developed by Z Microsystems. The 3.26g component was produced on a 60 tonne all-electric Allround- er 370A Alldrive machine on a two-cavity mould. The machine
was configured for clean room operation with an all-stainless steel finish and Ionstatex cleanroom module above the clamp unit. Meanwhile, a vertical clamp
Allrounder 275V machine was running as part of a production cell developed by Zahoransky for manufacturing of dispos- able cannulas. The novelty in this system is that glueing of the steel needle into the cannula hub is eliminated in favour of direct overmoulding with PP. The system, which includes automatic feeding to the eight-cavity mould, part removal and inspection, operated on a 10s cycle. Arburg also showed two of
the processing solutions it debuted at the Fakuma fair last year. The inline com- pounding system developed together with the SKZ institute (Süddeutsche Kunststoff-Zen- trum) for direct production of long fibre reinforced thermo- plastic (LFT) parts was demon- strated on a 400 tonne Allrounder 820S machine with a Multilift Select robot. This system uses a modified screw and barrel which allows the glass fibre reinforcement to be introduced to the molten
www.injectionworld.com
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