Nitrogen flow effects on part bed surface temperature during laser sintering

Mengqi Yuan; David Bourell

Nitrogen flow effects on part bed surface temperature during laser sintering

Mengqi Yuan, David Bourell

University of Texas at Austin

Research output: Contribution to conference › Paper › peer-review

1 Citation (Scopus)

Abstract

The role of nitrogen flow rate was invested as it affects the surface temperature of a polymer laser sintering part bin. A SinterStation 2500® was used for this study. The effect of nitrogen chamber flow rates between 0.5 and 2.5 m³/hr was observed and compared to the results of a computational fluids dynamics model. Increasing convective flow generates a uniform reduction in the surface temperature, but it does not meaningfully reduce surface temperature gradients. The part bin piston was modified to allow down drafting of nitrogen through the part bin. Down drafting, while once considered to be effective in accelerating cooling at the end of builds, did not have a significant effect on the surface temperature profile.

Original language	English
Pages	140-149
Number of pages	10
Publication status	Published - 2013
Externally published	Yes
Event	24th International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2013 - Austin, TX, United States Duration: 12 Aug 2013 → 14 Aug 2013

Conference

Conference	24th International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2013
Country/Territory	United States
City	Austin, TX
Period	12/08/13 → 14/08/13

Cite this

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title = "Nitrogen flow effects on part bed surface temperature during laser sintering",

abstract = "The role of nitrogen flow rate was invested as it affects the surface temperature of a polymer laser sintering part bin. A SinterStation 2500{\textregistered} was used for this study. The effect of nitrogen chamber flow rates between 0.5 and 2.5 m3/hr was observed and compared to the results of a computational fluids dynamics model. Increasing convective flow generates a uniform reduction in the surface temperature, but it does not meaningfully reduce surface temperature gradients. The part bin piston was modified to allow down drafting of nitrogen through the part bin. Down drafting, while once considered to be effective in accelerating cooling at the end of builds, did not have a significant effect on the surface temperature profile.",

author = "Mengqi Yuan and David Bourell",

year = "2013",

language = "English",

pages = "140--149",

note = "24th International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2013 ; Conference date: 12-08-2013 Through 14-08-2013",

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T1 - Nitrogen flow effects on part bed surface temperature during laser sintering

AU - Yuan, Mengqi

AU - Bourell, David

PY - 2013

Y1 - 2013

N2 - The role of nitrogen flow rate was invested as it affects the surface temperature of a polymer laser sintering part bin. A SinterStation 2500® was used for this study. The effect of nitrogen chamber flow rates between 0.5 and 2.5 m3/hr was observed and compared to the results of a computational fluids dynamics model. Increasing convective flow generates a uniform reduction in the surface temperature, but it does not meaningfully reduce surface temperature gradients. The part bin piston was modified to allow down drafting of nitrogen through the part bin. Down drafting, while once considered to be effective in accelerating cooling at the end of builds, did not have a significant effect on the surface temperature profile.

AB - The role of nitrogen flow rate was invested as it affects the surface temperature of a polymer laser sintering part bin. A SinterStation 2500® was used for this study. The effect of nitrogen chamber flow rates between 0.5 and 2.5 m3/hr was observed and compared to the results of a computational fluids dynamics model. Increasing convective flow generates a uniform reduction in the surface temperature, but it does not meaningfully reduce surface temperature gradients. The part bin piston was modified to allow down drafting of nitrogen through the part bin. Down drafting, while once considered to be effective in accelerating cooling at the end of builds, did not have a significant effect on the surface temperature profile.

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M3 - Paper

AN - SCOPUS:84898471552

SP - 140

EP - 149

T2 - 24th International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2013

Y2 - 12 August 2013 through 14 August 2013

ER -

Nitrogen flow effects on part bed surface temperature during laser sintering

Abstract

Conference

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