The Angle of Repose Attachment provides a simple method for assessing the friction characteristics of powders, the Copley angle of repose attachment is ideal for predicting manufacturing issues associated with resistance to movement between particles. Stand not included.
The Angle of Repose is the angle (relative to the horizontal base) of the conical pile produced when a granular material is poured onto a horizontal surface. It is related to the density, surface area and coefficient of friction of the material concerned. The Angle of Repose Attachment comprises a 100 mm diameter circular test platform together with a digital height gauge, having a range of 0-300 mm and an accuracy of 0.03 mm. The test platform has a protruding outer lip in order to retain a layer of powder upon which the cone is formed. Surplus powder is collected in a tray below the test platform.
|Flow Properties & Angle of Repose|
|Flow Property||Angle of Repose|
|Excellent||25 - 30|
|Good||31 - 35|
|Fair - aid not needed||36 - 40|
|Passable - may hang up||41 - 45|
|Poor - must agitate, vibrate||56 - 55|
|Very poor||56 - 65|
|Very, very poor||> 66|
Angle of Repose Instructions - For this particular test, the funnel is normally equipped with a special 10 mm i.d. nozzle mounted 75 mm above the test platform. If necessary, the contents may be stirred to assist in the powder flow. The tangent of the angle of repose (in degrees) can be determined by reading off the height of the powder cone in mm from the digital display of the height gauge and dividing it by 50.