APPARATUS FOR DRY-DISTRIBUTING OF FIBROUS MATERIALS

摘要

In dry-distribution plants for the formation of a course of fibrous materials on a perforated forming wire mesh with an underlying suction box and an overlying fibre distribution box, in which a pair of rotating, perforated drum cylinders are provided for the delivery of a stream of air-fluidised fibre, which is then flung out down on to the wire mesh by the drawing-down of air by the suction box from the upper end of the distribution box, problems have been experienced with regard to the formation of clumps of fibre material on the outer side of the drum cylinders and the inside of the distribution box. With the invention it has been found that these problems can be minimised by arranging cover plates (18) at a distance below the upper level of the drum cylinders, which plates substantially shield-off the free flow of air down through the vertical spaces between the drums themselves and between the drums and the adjacent side walls of the distribution box, in that there will hereby arise an increase in the concentration of the air supply directly down through the drum cylinders, and herewith also an increase in the distribution capacity of the plant.