Abstract: A component mixing jet including a jet nozzle housing with at least one component inlet and one component outlet. An axially movable jet needle is arranged in a reception in the jet nozzle housing and can rest against the jet nozzle housing with an axial end in the region of the component outlet in a sealable manner. The jet needle is connected with a membrane fixed in the jet nozzle housing. A pressure chamber is arranged in the jet nozzle housing at the side of the membrane averted from the axial end of the jet needle. The membrane is a holding element for the jet needle and guides the jet needle axially and holds it radially in the reception. The axial region between the membrane and the axial end of the jet needle is free from any bearing element for the jet needle in the region of the component outlet.

Abstract: A method for continuous production of an endless string of polyurethane reactive plastic material including, a) conveying the reactive components to a mixer in a metered manner, b) mixing the reactive components into a reactive mixture, c) subsequently discharging the reactive mixture and d) coating a first sheet section made from a plane, flexible material which is conveyed continuously in a transporting direction with the reactive mixture. Further including: e) guiding the first sheet section across a guiding element, which has a concave section and a flat section which follows the concave section in the transporting direction; f) feeding two lateral sheet sections to the first sheet section, wherein the feeding occurs into the two lateral end sections of the first sheet section; g) merging the two lateral sheet sections and the first sheet section so that a bowl-shaped structure is formed for reception of the reactive mixture.

Abstract: The invention relates to a method for the production of form parts from multi-component reactive plastic material, especially from polyurethane, wherein a plurality of moulds are moved by means of mould carriages (1) at least temporarily along a closed, preferably oval, production line (2).

Abstract: The invention relates to a method for producing of a form part, especially of a plane thin-walled fiber composite part, in a mold (1), comprising the steps: a) Providing of the mold (1), wherein the mold (1) comprises a cavity (2) with a nominal form volume (V) for inserting of a reactive mixture, wherein the cavity (2) is delimited by at least one cavity wall section (3) which is elastically deformable during the inserting of the reactive mixture and wherein the modulus of compressibility (K) of the cavity (2) is between 2,000 bar and 10,000 bar; b) Inserting of the reactive mixture into the cavity (2), wherein the reactive mixture is inserted with such a pressure into the cavity (2) so that the cavity volume is increased during the insertion of the reactive mixture due to elastic deformation of the at least one cavity wall section (3) above the nominal form volume (V); c) Letting solidify of the reactive mixture in the cavity (2); d) Demolding of the finished form part from the mold (1).

Abstract: The invention relates to a method for the production of form parts from multi-component reactive plastic material, especially from polyurethane, wherein a plurality of moulds are moved by means of mould carriages (1) at least temporarily along a closed, preferably oval, production line (2).

Abstract: The invention relates to a method for the production of form parts from multi-component reactive plastic material, especially from polyurethane, wherein a plurality of moulds are moved by means of mould carriages (1) at least temporarily along a closed, preferably oval, production line (2). To allow an easy, efficient and quick cleaning of the production line the invention proposes that temporarily instead of at least one mould carriage (1) a cleaning carriage (1b) is arranged in the production line (2), wherein the cleaning carriage (1b) is equipped with rolls (3) and is moved with the same on a stationary ground (4) and wherein the stationary ground (4) is cleaned with the cleaning carriage (1b). Furthermore, the invention relates to a device for the production of form parts.

Abstract: The invention relates to a method for producing of a form part, especially of a plane thin-walled fiber composite part, in a mould (1), comprising the steps: a) Providing of the mould (1), wherein the mould (1) comprises a cavity (2) with a nominal form volume (V) for inserting of a reactive mixture, wherein the cavity (2) is delimited by at least one cavity wall section (3) which is elastically deformable during the inserting of the reactive mixture and wherein the modulus of compressibility (K) of the cavity (2) is between 2,000 bar and 10,000 bar; b) Inserting of the reactive mixture into the cavity (2), wherein the reactive mixture is inserted with such a pressure into the cavity (2) so that the cavity volume is increased during the insertion of the reactive mixture due to elastic deformation of the at least one cavity wall section (3) above the nominal form volume (V); c) Letting solidify of the reactive mixture in the cavity (2); d) Demoulding of the finished form part from the mould (1).

Abstract: The invention relates to a process and a device for the production of mouldings containing a layer of polyurethane in shot operation, in which a gas stream is introduced into the flow channel of the spray device in at least two positions.

Abstract: The invention relates to a process and a device for the production of polyurethane clock foam, in which the reaction mixture, after flowing through a mixer, flows freely from an outflow opening and then flows through an accumulation chamber, in which a static pressure is built up, a gap and finally an expansion chamber.

Abstract: The invention relates to a method and device for partially or completely foaming the hollow spaces in the ballast structure of a ballast bed, below which a subgrade (7) is located, having a reactive plastic, wherein the reactive components are mixed in a high-pressure mixer (1,26) and wherein the start time for the reactive mixture (4) is adjusted such that the foaming process substantially only begins when the reactive mixture has reached the subgrade (7).

Abstract: The invention relates to a process and a device for the production of mouldings containing a layer of polyurethane in shot operation, in which a gas stream is introduced into the flow channel of the spray device in at least two positions.

Abstract: The invention relates to a process and a device for the production of polyurethane clock foam, in which the reaction mixture, after flowing through a mixer, flows freely from an outflow opening and then flows through an accumulation chamber, in which a static pressure is built up, a gap and finally an expansion chamber.

Abstract: Cellular or compact polyurethane moldings are produced by conveying at least one isocyanate component and at least one polyol component by a metering machine in dispensing manner into a mixing chamber via component lines to form a polyurethane reaction mixture. Subsequently, the polyurethane reaction mixture is discharged from the mixing chamber into a mold. The pressures of the components are registered by means of pressure transducers in the component lines and are transmitted to a monitoring device. The temporal profiles of the pressures are compared with reference pressure values stored in the monitoring device. A malfunction is signalled in the event of deviation of at least one of the measured pressure profiles from the reference pressure profile beyond a predetermined tolerance threshold.

Abstract: A press for rigid foam sheets with continuous adjustment of the spacing between the two press plates (1,3), in particular for sandwich panels with an upper and lower outer layer and, located therebetween, a core of rigid polyurethane foam. The lower press plate (3) is here moved into a preselected position corresponding to the panel thickness to be foamed by means of synchronously rotating threaded lifting spindles (4), assisted by weight-compensating cylinders (5). Short-stroke cylinders (6) are provided between the heads of the threaded lifting spindles (4) and the lower press plate (3). Said short-stroke cylinders have the function of dissipating the moulding force which has arisen due to foaming by moving the press plate (3) a very small stroke downwards. It is also possible, instead of the short-stroke cylinders (6), to install an air cushion system, which has a stroke of approx. 1 mm, between the press plate and the heating plate. This stroke is sufficient to dissipate the foaming pressure.

Abstract: The present invention relates to a process for the continuous production of polyurethane sandwich elements comprising an upper outer layer and a lower outer layer and a layer of cellular polyurethane lying in between, which is firmly bonded to the outer layers. This invention also relates to an apparatus suitable for the production of polyurethane sandwich elements as described above.

Abstract: The invention relates to a mixing head and to a method of mixing at least one polyol component and at least one isocyanate component and where appropriate additives, to form a polyurethane reaction mixture.

Abstract: The present invention relates to a method for the continuous mixing of at least one polyol component and at least one isocyanate component and optionally additives to form a polyurethane reaction mixture in a stirrer mixer with an axially conveying stirrer.

Abstract: The invention relates to a method of producing rebonded foam blocks in a box mould having a base, a plurality of mutually adjacent mould side walls standing thereupon and a plunger movable in the direction of the base, in which at least one of the mould side walls may be swiveled about a substantially horizontal swivel axis mounted on the base between an outwardly directed position and a substantially vertical position, the method involving mixing the foam flakes with a binder, swiveling at least one of the mould side walls outwards such that the cross-sectional area of the box mould increases from the bottom upwards, introducing the foam flakes into the box mould, adjusting the at least one mould side wall so that the cross-sectional area of the box mould is substantially constant over its height, compressing the foam flakes by means of the plunger to the desired density or foam block height, thereby bonding together the foam flakes and removing the finished foam block from the mould.

Abstract: Slabstock foam free of cavities can be produced without any restriction, i.e. also from rapidly reacting chemical systems, by introducing the liquid reaction mixture from underneath, in front of, and/or through an optionally swivellable floor plate, wherein the floor plate and the inlet for introducing the liquid reaction mixture is arranged in a manner such that the reaction mixture above the floor plate is substantially still liquid.

Abstract: A device for carrying out a sequence of working steps on travelling work station wagons comprising an oval track wherein said work station wagons are circulating, wherein said wagons comprise at least one detachable connection element connected to a circulating chain which moves said wagons; at least one insertion and at least one removal guide track is provided on the outside of said oval track, wherein said at least one insertion and at least one removal guide track comprises a transfer point to which the chain is allocated; at least one coupling element is further provided at each transfer point via which the wagons may be coupled into the guide tracks on the side opposite of the side of said wagons comprising at least one detachable element, with at least one switchable points element located on said guide track, which during the insertion position, release said at least one coupling element and bring about the engagement of said detachable connection element to said chain or during the removal position,