Case study Wire machine from Taiwan pays for itself at injection moulder

Editor: Eric Culp

A UK-based medical injection house has purchased a Taiwanese Excetek V350 CNC wire EDM unit. Vendor Warwick Machine Tools said the shop has seen dramatic results, including the recouping of the purchase price in a matter of months.

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The high-volume components are produced in a multi-cavity mould tool with a hot and cold half and a core pin made from Stavex 420 stainless steel.
The high-volume components are produced in a multi-cavity mould tool with a hot and cold half and a core pin made from Stavex 420 stainless steel.
(Source: Warwick Machine Tools)

A UK medical injection shop, which EDM machine vendor Warwick Machine Tools said wishes to remain anonymous, employs some 260 highly skilled staff and is a branch operation of a leading international technology company with facilities across the globe and a staff of 30,000 people.

Eliminating the flash

The UK site specialises in the development and manufacture of plastic, purpose-designed delivery systems and products manufactured in a clean room environment across medical and pharmaceutical organisations. The engineering workshop and toolroom ensures the precision moulds are maintained to the company’s high specifications. Moulded parts are extensively measured to ensure product conformance and aesthetics. During this checking process, flash was noted at the end of one of the components used for a disposable syringe protection system.

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These high-volume components are produced in a multi-cavity mould tool; each cavity has a hot and cold half, and a core pin made from Stavex 420 stainless steel. These precision-machined elements are expensive to replace, with all three reportedly costing more than £4,200 (€4,870). The engineering team investigated the possibility of repairing the cavities by laser welding the section where the flash was occurring and then using wire EDM to machine it back to the correct size.

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