Surface engineering by co-injection moulding

A novel process, powder co-injection moulding (PCM), a development of powder injection moulding is described. A twin-barrel injection moulding machine has been used to inject two different powder/binder mixtures sequentially into a mould. The new process allows surface engineering during powder inje...

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Bibliographic Details
Published in:Surface & coatings technology 1998-06, Vol.105 (1), p.65-71
Main Authors: Alcock, J.R, Logan, P.M, Stephenson, D.J
Format: Article
Language:English
Subjects:
Co-injection
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Materials synthesis
materials processing
Methods of materials synthesis and materials processing
Physics
Powder injection moulding
Process modelling
Sintering
Wear/corrosion resistance
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Summary:A novel process, powder co-injection moulding (PCM), a development of powder injection moulding is described. A twin-barrel injection moulding machine has been used to inject two different powder/binder mixtures sequentially into a mould. The new process allows surface engineering during powder injection moulding rather than as a post-production stage in the manufacturing cycle. Two examples of co-injection moulding are described. The first considers a polymer component having a particulate or fibre-reinforced skin layer. The second discusses the production of dense, layered ceramic or metal components having a corrosion- or wear-resistant surface layer. Modelling of the PCM process is being undertaken using a commercial finite-element modelling program, C-Mold and an example of how this may be used to predict coating thickness is presented.
ISSN:0257-8972
1879-3347
DOI:10.1016/S0257-8972(98)00443-5