Abstract: Disclosed are a process and a device for wetting pneumatically transported particles with a fluid where the fluid is sprayed by means of nozzles into a transport line through which the particles are flowing. The nozzles are installed in an area of the transport line which has a diffusor-like expansion in its cross section to insure that the particles are wetted uniformly and in a finely divided manner.

Abstract: A process for producing a low density fibrous mat from which a molded article may be formed by molding at elevated temperature, and which comprises a first layer of fibers, as well as thermosetting and thermoplastic binders, and at least one open covering layer of tangled fibers connected thereto is disclosed. The process including the steps of producing the first layer spreading a mixture of the fibers and the binders on to a rotating carrier web to form a continuous fleece and compressing the continuous fleece in a continuous process an elevated temperature and accompanied by the activation of part of the binders to give a transportable-resistant fibrous mat. On this fibrous mat are placed the tangled fibers forming the covering layer in the form of a continuous, open tangled fiber fleece and the latter is connected to the fibers and/or the binders of the first layer by binders having an affinity therewith. The covering layer has a higher density than the first layer.

Abstract: In a process for producing fibrous mats from starting material for compression moulded articles, fiberized waste materials are mixed with thermoplastic and/or duroplastic binders, the mixture is spread on to an air-permeable conveyor belt to form a first fleece layer, a fabric is placed loosely on said fleece layer, then a second fleece layer is spread on the fabric or lattice and subsequently the composite fleece is compressed at elevated temperature and under pressure to form a transportable mat from which individual moulded articles can be produced by compression moulding at temperatures between 180.degree. and 220.degree. C., the fabric being sprayed with a liquid phase duroplastic finish prior to its deposition. In this way the fabric finish composition can be matched to the binder for the fibres, so that completely satisfactory binding or tying in of the fabric into the fleece layers can be achieved.

Abstract: In a process for producing fibrous mats as a starting material for compression moulded articles, fiberized waste materials are mixed with thermoplastic and/or thermoset or thermosetting binders, the mixture is spread onto an air-permeable conveyor belt to give a first fleece layer, on said fleece layer is loosely placed a polyester fabric or lattice with at least partly multifilament threads, a mesh size between 4 and 7 mm and a thermoset or thermosetting finish, then a second fleece layer is spread onto the fabric or lattice and then the layers are compressed at elevated temperature and under pressure to give a transportable mat, from which individual moulded articles are produced by compression moulding at temperatures between 180.degree. and 220.degree. C., the polyester fabric undergoing thermal conditioning prior to its use at temperatures roughly corresponding to the mould temperature.

Abstract: Low density fibrous mats formed from fibres and thermosetting and thermoplastic binders, transformed by moulding at elevated temperatures are used for the production of mouldings. Such fibrous mats are produced in that a mixture of fibres and binders is spread out to form a fleece and the latter is compressed or compacted to a mat at high temperature. For the planned influencing of the characteristics of the moulding, while simultaneously reducing the binder requirement and the density, it is proposed that the fibrous mat or blanks thereof is passed through a pair of rollers with polished surfaces and by means of at least one roller binder is applied from the aqueous phase to the side of the fibrous mat facing the same under pressure action and that the fibrous mat is passed through the roller pair at a speed lower than the circumferential speed thereof and following onto the roller pair is passed through a drying zone.

Abstract: An apparatus for manufacturing cellulosic fibrous material suitable for future compressing into a molded article which comprises a prepulverizing apparatus for cutting cellulosic material, a mixing chamber for mixing the prepulverized cellulosic material with a bonding material, a forming head for receiving the mixture from the mixing chamber and for dispensing the cellulosic fibrous material/binder mixture as a mat upon a moving carrier, a heating apparatus for heating the mat and a pressing apparatus for compacting and bonding the heated fibers in the mat.

Abstract: Cellulosic fibrous material which can be pressed into moulded parts is manufactured from cellulose-containing material which is separated into a fibrous material, the separated fibrous material then being mixed with a binding agent (particularly a combination of thermoplastic and thermosetting substances) and formed into a fleece which is compressed under heat action. The cellulose-containing starting material is derived from waste cellulosic fibrous material and such waste material is cut up and ground in a dry state and the bonding agent is added in particulate form also in the dry state.An apparatus is described which has a pre-pulverizing apparatus, a mixing chamber, a grinder, an endless fleece conveyor, a forming head, a heating apparatus and a pressing apparatus.The resulting cellulosic fibrous material can be pressed into moulded parts between pressing tolls in the dry state and with a single pressing stroke.

Abstract: A method of heating a fleece comprises supporting the fleece on a perforate fleece carrier and passing a heated gas through the fleece and fleece carrier, preferably in that sequence to assist compaction of the fleece. Apparatus for performing this method comprises two chambers between which the fleece is passed on the carrier, the chambers being maintained at different pressures by a fan to create the flow through the fleece and through a radiator for heating the gas. The gas may be recirculated and may be filtered and/or augmented by a further supply. A roller at the exit end of the chambers compresses the heated fleece, preferably from above. The fleece carrier may be preheated upstream of the heating station, for example by induction heating in the case of a metal fleece carrier. A freely running roller having adjustable height rests on the fleece and seals the entry to the heating station.

Abstract: A resilient thermally-conductive pressure compensator for use in heating plate presses used to manufacture coated wood panels or boards, comprising a composite sheet consisting of a woven mesh of metal wires embedded in a matrix of a heat conducting elastomeric filler material.