AT303J Arnold Density Meter is used to determine the apparent density of both free-flowing and non-free-flowing metal powders, lubricated metal powder mixtures, and powder compounds.
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Steel die block
Powder delivery cylinder
(1) Tare the sheet of coated weighing paper and lay it on a flat level surface
(2) Thoroughly clean the steel die block and the powder delivery cylinder with a dry cotton cloth to remove any loose powder particles.
(3) Place the steel die block in the center of the sheet of tared paper.
(4) Locate the empty delivery cylinder upright on the steel die block, on either side of the die cavity.
(5) Carefully fill the delivery cylinder with the 50cm3 test sample of powder to the ring inscribed at three-quarters of its height.
(6) With downward pressure on the delivery cylinder, slowly and smoothly slide it forward across the cavity while simultaneously rotating it. This produces a cascading action by the powder as it falls into the cavity. Continue these motions until the cylinder passes completely over the cavity. Then, maintaining downward pressure on the cylinder, slide it straight back over the cavity to the starting location. This sliding action must be slow enough to leave the cavity in the die block completely filled.
(7) Slowly lift the die block together with the partially empty delivery cylinder off the weighing paper to allow the contents (the test specimen) of the die cavity to collect on the paper, being careful not to tip the block and possibly spill additional powder.
(8) Transfer the pre-weighed paper with the powder to the balance and determine the mass of the powder collected to the nearest 0.01g. This is M, the mass of the test specimen.