Verfahren und Vorrichtung zur Bestimmung der Dichte von Koerpern

DE 19903806 C UPAB: 20000419 NOVELTY - The mass mK of the body is measured. A vessel (1) is filled with liquid and the body is placed in a second vessel (3) with an opening (4). Liquid-permeable regions (5,6) enable fluid to enter, whilst containing the body. The opening is closed and the second vessel is fully immersed in liquid in the first, until the second vessel has filled through the permeable areas. Rise of fluid in the first vessel is measured. The body volume VK is established from the rise in level, with regard for the net volume VB of the second container itself. Density is determined from the measured mass mK and volume VK. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the apparatus for the above process. Preferred Features: Body mass is determined by difference, weighing the body in the second vessel. The liquid is water. The second vessel is so dimensioned in such material, that the quotient mB/VG of mB, the empty second vessel mass and the total external volume VG, corresponds with the density of the liquid. Further key features of the equipment include finely-perforated plates or grids at the liquid-permeable ends, cylindrical vessels and a graduated transparent sidewall in the first vessel. USE - For the measurement of granules of recycled plastic material. The density is a measure of air inclusions within the volume of individual granules, which have a bearing on quality. ADVANTAGE - The second vessel ensures the granules cannot float on the surface. It is designed such that all air can be removed from between the granules. The scale on the outer vessel simplifies volume determination