Metal Injection Mouldings
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The Advantages Of Metal Injection Moldings

Metal Injection Mouldings combines the technologies of powder metallurgy and injection moulding to produce small metal parts in complex shapes, with finely reproduced detail, close tolerances and a smooth surface finish.

These attributes are all combined with excellent mechanical properties in alloy steels, stainless and tool steels, nickel and cobalt alloys, Kovar and magnetic alloys.

The MIM process can virtually eliminate machining and is ideal for medium to high quantities of small components.

SUMMARY OF WHAT MIM CAN OFFER

SIZE RANGE
Generally from 2mm to an envelope size of approximately 50mm, but lengths up to 150mm are possible. Maximum weight - approximately 100 grams.

QUANTITIES
Typically 20,000 or more per year, but smaller quantities can be economically viable, depending on size, complexity etc.

MATERIALS
MIM parts have excellent strength, ductility, magnetic response and can be bent, welded, hardened and treated like any other metal.

Aluminium and Zinc are not suitable for MIM.

DIMENSIONAL TOLERANCES
Typical tolerances are shown in the accompanying table. Where closer tolerances are required, additional operations such as coining and setting can be carried out. Even non-toleranced dimensions will have excellent repeatability.

SURFACE FINISH
Generally 1.6 microns (63CLA, N7)
MIM parts are ideal for vibratory polishing, chemical blacking, electroplating etc.

TOOLING
Hardened steel dies are used, similar in design to injection dies for plastics.
It is often possible to combine different parts in one tool.

DESIGN PRINCIPLES
These follow similar guidelines to plastic injection mouldings. Square holes, threads, lettering, teeth and serrations can all be produced.

Design Guide

QUALITY
Accredited to BS EN ISO 9001:2000
Although our production facilities are completely autonomous, we share the extensive testing capabilities of our associated company P.I. Castings Ltd, including mechanical test, analysis, x-ray and dye penetrant.

ALTERNATIVE PROCESSES
If your requirements are not suitable for MIM, our associated company P.I. Castings Ltd, may be able to produce your parts as investment castings

P.I. Castings

Metal Injection Mouldings Ltd Davenport Lane, Altrincham, Cheshire, England WA14 5DS
Tel: +44 (0) 161 928 4247   Fax: +44 (0) 161 927 7023   Email:
mim@metalinjection.co.uk