12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > An Investigation into the Use of Spray Formed A...
View graph of relations

« Back

An Investigation into the Use of Spray Formed Al/Si Metal Matrix Composites for Use as Injection Mould Die Inserts

Research output: Contribution in Book/Report/ProceedingsChapter (peer-reviewed)

Published

Publication date09/2001
Host publicationTime Compression technologies Conference 2001: Proceedings of
PublisherRapid News Publications PLC
Number of pages22
Original languageEnglish

Conference

ConferenceTime Compression Technologies Conference 2001
CountryUnited Kingdom
CityManchester
Period26/09/0127/09/01

Conference

ConferenceTime Compression Technologies Conference 2001
CountryUnited Kingdom
CityManchester
Period26/09/0127/09/01

Abstract

Metal Matrix Composites (MMCs) have been developed, which can offer certain properties that metals or alloys alone cannot give. An example of one of these materials is the aluminium/silicon (Al/Si) composite. This material possesses good thermal conductivity, with thermal expansion matching capabilities that can be "tuned" by varying the quantity of silicon in the composite. It also exhibits a very high stiffness-resistance to elastic deformation. Whilst it is relatively easy to machine, it does require very sharp carbide tools. Alternatively, the material may be readily machined using Electro-Discharge Machining (EDM). This paper examines the use of EDM to rapidly form a tool insert from a MMC with a Coefficient of Thermal Expansion (CTE) of 11ppm, the same as that of tool steel used for bolsters. Details of the process of manufacture of the inserts, surface, and dimensional measurements, its performance in injection moulding trials and methodologies of enhancing tool life are discussed.