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Title: Reducing ejection forces for parts moulded into direct metal laser sintered tools.
Authors: Majewski, Candice E.
Hopkinson, Neil
Keywords: Direct metal laser sintering
Rapid tooling
Ejection force
Injection moulding
Draft angle
Issue Date: 2004
Publisher: © Springer Verlag
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.
Abstract: 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.
Description: 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.
URI: https://dspace.lboro.ac.uk/2134/3555
ISSN: 1433-3015
Appears in Collections:Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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