Abstract: A method for producing back-foamed air-permeable textile products, whereas, instead of providing a film or the like to prevent the penetration of reaction products or foam to the visible face, the pressure created during the reaction is intentionally decreased so that none of the reaction products nor the foam created by the reaction of the reaction products is able to penetrate the textile product. With a product manufactured in this way, the climatic comfort is improved and a better acoustic effect can be achieved. The disclosure also relates to a device which is suitable for carrying out the method and to a corresponding back-foamed air-permeable textile product.

Abstract: The invention relates to a method of producing a sound insulation molding with mass (2) and spring (3), wherein both mass (2) and spring (3) are produced on the basis of the same material, in particular polyurethane. For the formation of a mass, reaction substances and fillers are brought into a mold, in particular sprayed in or injected, and brought to reaction. The spraying in or injection is thereby controlled such that the reaction substances and the fillers are supplied in locally different quantity and/or composition into the mold, dependent upon the sound damping to be locally achieved together with the spring, which is then formed on the so-formed mass (2) in the same mold through formation of foam. Through this, with surfaces to be sound insulated which are of the same geometry, three-dimensional moldings (1) of the same geometry can be produced with both different acoustic and also mechanical behavior in predetermined series.

Abstract: A method for producing back-foamed air-permeable textile products, whereas, instead of providing a film or the like to prevent the penetration of reaction products or foam to the visible face, the pressure created during the reaction is intentionally decreased so that none of the reaction products nor the foam created by the reaction of the reaction products is able to penetrate the textile product. With a product manufactured in this way, the climatic comfort is improved and a better acoustic effect can be achieved. The disclosure also relates to a device which is suitable for carrying out the method and to a corresponding back-foamed air-permeable textile product.

Abstract: A method of producing a sound insulation molding with mass and spring, wherein both mass and spring are produced on the basis of the same material, in particular polyurethane. For the formation of a mass, reaction substances and fillers are brought into a mold, in particular sprayed in or injected, and brought to reaction. The spraying in or injection is thereby controlled such that the reaction substances and the fillers are supplied in locally different quantity and/or composition into the mold, dependent upon the sound damping to be locally achieved together with the spring, which is then formed on the so-formed mass in the same mold through formation of foam. Through this, with surfaces to be sound insulated which are of the same geometry, three-dimensional moldings of the same geometry can be produced with both different acoustic and also mechanical behavior in predetermined series.

Abstract: A method of producing a sound insulation molding with mass and spring, wherein both mass and spring are produced on the basis of the same material, in particular polyurethane. For the formation of a mass, reaction substances and fillers are brought into a mold, in particular sprayed in or injected, and brought to reaction. The spraying in or injection is thereby controlled such that the reaction substances and the fillers are supplied in locally different quantity and/or composition into the mold, dependent upon the sound damping to be locally achieved together with the spring, which is then formed on the so-formed mass in the same mold through formation of foam. Through this, with surfaces to be sound insulated which are of the same geometry, three-dimensional moldings of the same geometry can be produced with both different acoustic and also mechanical behavior in predetermined series.

Abstract: A method for producing a noise insulation piece of mass/spring construction. The mass has, at least before a deep draw process, at least one locally defined region, with a different weight per area from the other regions. After the deep draw process, the spring layer made from an elastic light material such as two-component polyurethane foam or a mixed non-woven fiber is applied. The locally different weight per area of the mass is achieved by means of application of a granulate to a base mass layer in particular in locally differing amounts and/or thicknesses, wherein the granulate is fixed to itself and to the base mass layer by means of sintering. After deep drawing, the desired weight per area of the mass can be achieved independent of the degree of drawing. The granulate can alternatively also be applied to a thin and lightweight support layer in locally required amounts or thicknesses.

Abstract: An element for sound insulation which forms the external completion of a housing-like structure excited to oscillations, in which there is located at least one sound emitter, which element is formed of a shaped thermoplastic material, which is reinforced by a glass fiber component of more than 35 weight percent based on the total weight of the thermoplastic material and the glass fibers component.

Abstract: A method for producing back-foamed air-permeable textile products, whereas, instead of providing a film or the like to prevent the penetration of reaction products or foam to the visible face, the pressure created during the reaction is intentionally decreased so that none of the reaction products nor the foam created by the reaction of the reaction products is able to penetrate the textile product. With a product manufactured in this way, the climatic comfort is improved and a better acoustic effect can be achieved. The disclosure also relates to a device which is suitable for carrying out the method and to a corresponding back-foamed air-permeable textile product.

Abstract: A molding tool for producing molded foam bodies, particularly polyurethane molded foam bodies, by filling a mold with an expandable reactive mixture, whereby the shaping inner surfaces of the tool are provided with a microstructuring with the lotus leaf effect and/or with a durable nonstick coating made of a fluoroplastic or of a diamond-like coating.

Abstract: A method for manufacturing a foamed polyurethane molded article, that includes the steps of introducing an expandable polyurethane reactive mixture into a mold and evacuating the mold, expanding the reactive mixture expands so as to fill the mold, and exhausting gases liberated during the expanding step through one or more expansion openings disposed at one or more points of maximum height in a top mold region, each of the expansion openings being closeable by a needle valve disposed in a valve capillary. In addition the method includes sensing a temporal pressure characteristic in the valve capillary, controlling each of the one or more needle valves using the temporal pressure characteristic, so as to close the respective expansion opening in response to a pressure drop occurring when the expanding reactive mixture penetrates into the valve capillary, opening the mold, and ejecting the molded article.

Abstract: A method and a device for applying a filler-containing plastics layer to even a shaped surface, in which a mixture containing a binder or a binder mixture and a filler is sprayed onto the surface, a free jet for application by spraying first being generated from a binder or binder mixture and the filler then being added to the free jet of the not yet polymerized binder or binder mixture. The method is particularly suitable for the spray application of heavy layers such as those used in conventional mass-spring systems.