Dear Ladies and Gentlemen,
as mentioned above I´m in search vor papers that cope with the topic of the different recoating mechanisms in 3DP, especially about flow models like the free flowing rotating powder wedge. So far I just found phenomenological observations which state that doctor blades are excellent for slurries, while the counter direction rotating roller is much better for dry cohesive powders. Which in my opinion has to do with the rotation disturbing the segregation of differently sized grains in the powder wedge, but I don´t have literature for that...I would appreciate your help because I have no idea where to search, anymore.
Thank you very much, your sincerely Michael Wenzel
As i have observed that it is not discussed in details in any book related to 3D printing. I think only machine manufacturers are having the current data about the different re-coating mechanisms. Hope you will find it in the literature of fluid mechanics.
HI Michael
Ankit is right, However, you may refer these links:
http://www.sciencedirect.com/science/article/pii/S187538921202593X
http://www.slsoptics.com/
Thank you very much for your answers, actually I found some papers (though very few) that were dealing a bit with the topic. If I still have them saved I`ll post the links to get the full-texts later.
As promised the links to articles I found rather enlightening:
http://www.sciencedirect.com/science/article/pii/S1742706111003801
http://www.annualreviews.org/doi/abs/10.1146/annurev.fluid.32.1.55
and a Master thesis that also gave some insights
https://monami.hs-mittweida.de/files/3344/Masterarbeit_Wienecke_2013.pdf
PS: the last source is in german
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