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Research Papers

Effect of Sintering Parameters and Flow Agent on the Mechanical Properties of High Speed Sintered Elastomer

[+] Author and Article Information
Farhana Norazman

Department of Mechanical Engineering,
The University of Sheffield,
Sheffield S1 3JD, UK
e-mail: fnorazman1@sheffield.ac.uk

Neil Hopkinson

Department of Mechanical Engineering,
The University of Sheffield,
Sheffield S1 3JD, UK

1Corresponding author.

Contributed by the Manufacturing Engineering Division of ASME for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received April 12, 2014; final manuscript received August 25, 2014; published online October 24, 2014. Assoc. Editor: Joseph Beaman.

J. Manuf. Sci. Eng 136(6), 061006 (Oct 24, 2014) (6 pages) Paper No: MANU-14-1165; doi: 10.1115/1.4028482 History: Received April 12, 2014; Revised August 25, 2014

High speed sintering (HSS) is an additive manufacturing (AM) process that creates parts by sintering powder particles using inkjet and infrared (IR) lamp technology rather than laser systems employed in laser sintering (LS). This research investigated the effects of machine parameters (lamp speed, bed temperature) and the addition of fumed silica flow agent on the tensile properties of thermoplastic elastomer (TPE) parts processed using HSS. The results showed improved elongation at break (EaB) values by a factor of more than 2× compared to reported values for LS of the same TPE. At constant parameters, improved tensile strength and tensile modulus were observed with the addition of flow agent into the sintering mixture.

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Figures

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Fig. 1

HSS machine and key parts

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Fig. 2

Variation of EaB with lamp speed and bed temperature

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Fig. 3

Variation of UTS with lamp speed and bed temperature

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Fig. 4

Variation of YM with lamp speed and bed temperature

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Fig. 5

Variation of EaB with bed temperature and lamp speed

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Fig. 6

Variation of UTS with bed temperature and lamp speed

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Fig. 7

Variation of YM with bed temperature and lamp speed

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Fig. 8

Variation of EaB with flow agent level at different lamp speeds and bed temperatures

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Fig. 9

Variation of UTS with flow agent level at different lamp speeds and bed temperatures

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Fig. 10

Variation of YM with flow agent level at different lamp speeds and bed temperatures

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Fig. 11

DSC scan of TPE210-S mixed with 0.2% Cab-O-Sil and virgin TPE210-S

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Fig. 12

Average roughness values against flow agent addition

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