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Reducing ejection forces for parts moulded into direct metal laser sintered tools.

journal contribution
posted on 08.08.2008 by Candice E. Majewski, Neil Hopkinson
With the development and refinement of Rapid Prototyping technologies, a gradual move into tooling applications has occurred. However, the design principles that are traditionally applied to mould tools are not always suitable for use with layer-manufactured tools. As these technologies develop, so must the ways in which they are used. Tools produced using Direct Metal Laser Sintering (DMLS) have previously been shown to be suitable for several applications, in particular for plastic injection moulding. However, there has been little work undertaken on the best procedures to follow when designing tools made using the DMLS process. This work has been performed to determine the effect of layer thickness, level of finishing and draft angle on the forces required to eject parts from DMLS injection mould tools. Results show that, although the choice of layer thickness and the level of tool finishing have a substantial effect on the ejection forces required, the level of draft included does not show an obvious trend towards increasing or decreasing the force.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

MAJEWSKI, C.E. and HOPKINSON, N., 2004. Reducing ejection forces for parts moulded into direct metal laser sintered tools. International Journal of Advanced Manufacturing Technology. 24(1-2), pp 16-23.

Publisher

© Springer Verlag

Publication date

2004

Notes

This article is Restricted Access and it was published in the journal, International Journal of Advanced Manufacturing Technology [© Springer Verlag]. The original publication is available at www.springerlink.com/engineering/production+eng/journal/170.

ISSN

1433-3015;0268-3768

Language

en

Exports