Mould and press tools Crossen Engineering invests in spark-erosion machine to handle important medical projects

Editor: MA Alexander Stark

UK — Crossen Engineering, a specialist in both toolmaking and parts production for injection moulding and pressing/stamping operations, has invested in a new Sodick AD35L spark-erosion machine from Sodi-Tech EDM. The machine, which arrived in December 2020, is now busy producing mould and press tools for a range of important medical projects.

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Sodick technology installed at Crossen Engineering, James Dunlop, Toolmaker.
Sodick technology installed at Crossen Engineering, James Dunlop, Toolmaker.
(Source: Sodi-Tech EDM)

Founded in 1978, Belfast-based Crossen Engineering is today a full service provider, offering everything from component design and prototyping, to complete production. Despite operating a well-equipped toolroom and production shop, an upturn in medical work over the past twelve months saw the BS EN ISO9001 accredited manufacturer begin the search for a new die-sink EDM. Crossen Engineering already had a modern Sodick wire EDM on site, but its Sodick spark-erosion capacity was 15 years old. “Medical work has high demands in terms of accuracy, complexity and turnaround time, which we know from experience is ideally suited to the attributes of Sodick machines,” explains Managing Director Paul Crossen. “Our new machine was always going to be a Sodick as we want consistency throughout the business in terms of learning and training.” The Sodick AD35L was an ex-demo model that arrived on site in Belfast within four weeks of order placement. Crossen Engineering expects the new Sodick AD35L to attract new customers and orders, particularly involving high-end work.


Since installation, the machine has been busy producing mainly medical moulds, both prototype and production (aluminium and tool steel). P20 tool steel was used for the mould that makes the mobility product, for instance. The machine structure of the Sodick AD35L features optimised rib arrangements that increase rigidity by approximately 70 %. As a result, deformation is minimised to allow optimum performance at high speed, supported by rapid-acceleration linear motors across the XYZ travel dimensions of 350 x 250 x 270 mm.

Crossen Engineering offers injection-moulding capacity from 30T to 550T, for parts ranging in weight from 1 g to 2.5 kg. The AD35L is capable of creating tools for the largest moulding machine on site, which was an important factor in its selection. The machine also finds use producing press-tool parts. Crossen can provide capacity up to 500T for metal stamping, the highest in Northern Ireland.

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