Method and apparatus for applying on the grains and short fibers, coatings of other materials, in particular of thin films of material synthet 19

摘要

979,932. Coating apparatus; batch mixing appliances. W. LODIGE, F. LODIGE, and J. LUCKE. April 27, 1962 [May 16, 1961], No. 16222/62. Headings B1C and B2B. An apparatus for enveloping granular and/ or short-fibred substances with coatings of other substances comprises a mixing drum 1 which is mounted horizontally or slightly inclined, at least one coaxially arranged rotating shaft 2 which runs through the drum 1 and on which shaft 2 are arranged, helically and at right angles to the shaft 2, carrier arms 6 mounted on the end of which are wedge-shaped or ploughshare-like mixing tools 7, 7a, abrasive members 9, 9a, 9b which are mounted parallel to the direction of movement of the mixing tools 7, 7a between two mixing tools on the inner wall of the drum 1, and which members 9, 9a, 9b co-operate with the lateral faces of the mixing tools 7, 7a, a drive mechanism (not shown) which drives the mixing tools 7, 7a at a peripheral speed of 2À5-6 m./sec., feed apertures 4, 18 a discharge aperture 5, air injection apertures 11 mounted above the shaft 2 at the side of drum 1 at which the mixing tools 7, 7a travel downwards, a ventilating shaft 3 which is mounted above the upper portion of drum 1, knife-like cutting members 8 mounted on the carrier arms 6, and dividing and deflecting rods 10, 10a which are mounted below the ventilating shaft 3 between each two mixing tools 7, 7a. In the ventilating shaft 3 is built a partition wall 15, at the bottom of which is a baffle 13 by means of which the material thrown upwards is returned to the interior of the drum. In use the drum is filled to 30-70% with raw materials.