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MIM/CIM Hot runners refine metal and ceramic injection moulding

| Editor: Eric Culp

Jörg Essinger, head of application technology at Günther Heisskanaltechnik, explains how hot runners can improve the process and cut waste when turning harder materials embedded in plastics into finished products.

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The base plate (below) made of a titanium alloy for an implantable infusion pump (above) was formerly manufactured by a complex cutting process.
The base plate (below) made of a titanium alloy for an implantable infusion pump (above) was formerly manufactured by a complex cutting process.
(Source: TiJet )

MIM (Metal Injection Moulding) and CIM (Ceramic Injection Moulding) technologies take advantage of the freedom offered by the injection moulding process for the production of metal and ceramic components. With these methods, three-dimensional components can be cast in only one working step without the necessity of subsequent machining. Well adapted hot runners are indispensable for manufacturing process safety.

Metal and ceramic powder filled plastics are used in many different fields. Examples of use of MIM are components for consumer products like ballpoint pens or for products for medical use. Products manufactured by CIM are in demand where ceramics are required for insulation, often in conjunction with high temperatures. Examples of use can be found in the lighting industry or in the manufacturing of spark plugs.

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Both of the processes are relatively easy to use and make it possible to produce components without subsequent machining. This type of manufacturing can produce complexly formed components that would not be possible at all with machining, or only with considerably more effort.

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