Abstract: Products of mineral wool, in particular monolayer and multilayer products of rock wool, are manufactured wherein the mineral wool material of a primary mat is mechanically comminuted by a combined beating and cutting process into mineral wool flakes of a predetermined size and subsequently recombined for forming a final mat. By such a treatment of the mineral wool material, practically any inhomogeneities and imperfections in the primary mat are eliminated, i.e., they are not present any more in the final mat. The process of the invention thus results in the final mat in products having a three-dimensional, isotropic fiber structure, which brings about a noticeable economy in the bulk density, at an at least equivalent quality in comparison with conventional crimped products.

Abstract: A process for manufacturing products of mineral wool, in particular monolayer and multilayer products of rock wool, wherein the mineral wool material of a primary mat (2, 2?) is mechanically comminuted by a combined beating and cutting process into mineral wool flakes (9) of a predetermined size and subsequently recombined for forming a final mat (4). By means of such a treatment of the mineral wool material, practically any inhomogeneities and imperfections in the primary mat (2, 2?) are eliminated, i.e., they are not present any more in the final mat (4). The process of the invention thus results in the final mat (4) in products having a three-dimensional, isotropic fiber structure, which brings about a noticeable economy in the bulk density, at an at least equivalent quality in comparison with conventional crimped products.

Abstract: Method for the production of binder-bound mineral wool products, in which mineral fibres are deposited on a production surface (13) to form a mineral wool web (12) and are compacted, and their relative positions are reoriented by mechanical action, for which purpose the web is guided on its large faces and at the, same time forces, in particular upsetting forces, are introduced into the web in parallel with the large faces, the forces being introduced in introduction regions which are located next to one another transversely to the running direction in zones and in each case at a distance from one another and one behind the other in the running direction in longitudinal zones, and the introduction regions of adjacent longitudinal zones being arranged so as to be offset relative to one another, after which the binder is cured.

Abstract: Method for the production of binder-bound mineral wool products, in which mineral fibers are deposited on a production surface (13) to form a mineral wool web (12) and are compacted, and their relative positions are reoriented by mechanical action, for which purpose the web is guided on its large faces and at the same time forces, in particular upsetting forces, are introduced into the web in parallel with the large faces, the forces being introduced in introduction regions which are located next to one another transversely to the running direction in zones and in each case at a distance from one another and one behind the other in the running direction in longitudinal zones, and the introduction regions of adjacent longitudinal zones being arranged so as to be offset relative to one another, after which the binder is cured.

Abstract: An apparatus and a process for the continuous production of mineral wool nonwovens in the nonwoven formation process on the drums of the accumulating conveyors arranged at the lower end of a chute. Several fiberization units (1, 2, 3, 4) communicate with a chute (9) for the formation of a nonwoven (14). The fibres are deposited under the influence of suction pressure onto the curved surface of the accumulating conveyor (10, 11). At least one of the drum-shaped accumulating conveyors (10) is designed to swivel around a pivot (23) essentially arranged perpendicular to the flow direction (22) of the mineral wool such and to the extent that a discharge gap (21) can be adjusted to a width corresponding to the thickness of the nonwoven (14) to be formed.

Abstract: In the production of bonded mineral fibre wool, binder is injected in the chute (16) onto the fibres, as a result of which there is a tendency for the fibres to adhere to the walls of the chute (16) and to form encrustations due to binder becoming cured in the course of time. To avoid such encrustations, which can cause production shortfalls, the circumferential walls (18, 20) of the chute are constructed as jacketed walls and are cooled by passing cooling liquid in the hollow space (30) between the inner and outer surface portions (28, 29). It has been found, surprisingly, that as a result no solid encrustations can form even over prolonged periods, since temporarily adhering fibres cannot in fact become adhesively bonded due to insufficient curing of the binder at the low temperatures, but are continuously removed from the wall again.