کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4914753 1427718 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of the wall slip behaviour of a solid granular soap in ram extrusion
ترجمه فارسی عنوان
اندازه گیری رفتار لغزش دیوار یک صابون گرانول جامد در اکستروژن رام
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- The wall slip behaviour of a solid soap in ram extrusion was investigated.
- The slip behaviour was found to be sensitive to extruder wall material.
- A comparison of wall slip measurements from three techniques is presented.
- The slip behaviour was also found to be strongly velocity-dependent.

The wall slip behaviour of a solid granular soap was investigated in the context of ram extrusion, with particular focus on determining the sensitivity of the wall shear stress to the pressure within the soap, as well as the slip velocity. Two novel slip measurement devices were used to infer the shear stress: a two stage extrusion die with inbuilt pressure gradient measurement; and a combined compression-translation assembly to measure the frictional force between the soap and the wall. Both devices provided differing measurements of the pressure sensitivity, and gave shear stress estimates in agreement with a Benbow and Bridgwater analysis of the extrusion behaviour, which cannot gauge pressure dependence.The influence of the wall material on the slip and extrusion behaviour was also investigated, using three geometrically identical extruders constructed from polycarbonate, stainless steel and tungsten carbide. There was found to be a non-negligible relationship between wall material, wall surface roughness, and the Benbow-Bridgwater extrusion parameters, in which the wall shear stress was greatest against the smoothest, cemented tungsten carbide wall in contrast to a rougher stainless steel and rougher-still polycarbonate wall.

Graphical Abstract266

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Powder Technology - Volume 323, 1 January 2018, Pages 76-85
نویسندگان
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