Thursday 8 January 09 - 18:54
 

Moulds & Moulding

Steel Injection Moulding Promoted at Interplas05

At the Interplas event in August, Metal Injection Mouldings Ltd of Altrincham, Cheshire promoted a relatively new manufacturing technique combining the well established technologies of powder metallurgy and injection moulding.

The MIM process makes possible the production of high integrity steel parts in complex shapes, yielding close tolerances, a smooth surface finish and finely reproduced detail.

Components can be made in a wide range of metals including low alloy steels, stainless steels, tool steels, magnetic alloys, Kovar and Invar. The size range of MIM parts is typically 2mm to 75mm.

The process starts with an extremely fine metal powder being mixed with a special binder to make pellets, which are injected into a mould to form the required shape. The binder is then removed and the parts are sintered to produce high density metal components, with the superior mechanical properties of higher strength metals compared to either plastic injection mouldings or pressure die castings.

Although the moulding part of the process is similar to plastic injection moulding, the comparison ends there, as there is very sophisticated equipment and technology used at the metal preparation and sintering stages.

www.metalinjection.co.uk

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Metal Injection Moulding Ltd

Stevens Rowsell is a specialist precision sheet metal engineering company in East Sussex