Abstract: A melting device includes a container capable of melting a material supplied in a free-flowing state and storing the material in a liquid state. The container includes a first storage section for storing the material in the free-flowing state, a second storage section for storing the material in the liquid state, and a dividing section provided between the first storage section and the second storage section and configured to hold back the material, when the material is in a non-molten or free-flowing state and to allow passage of the material from the first storage section into the second storage section, when the material is in a molten or liquid state.

Abstract: An injection box for a pultrusion system, the injection box comprising: a housing which has at least one fibre supply opening for supplying fibres, in particular glass fibres, carbon fibres or aramid fibres; an injection connection provided on the housing for injecting a liquid matrix material; and a delivery opening for delivering the fibres impregnated with the matrix material to a curing tool; wherein the output opening has a substantially circular cross-section.

Abstract: A melting device includes a container capable of melting a material supplied in a free-flowing state and storing the material in a liquid state. The container includes a first storage section for storing the material in the free-flowing state, a second storage section for storing the material in the liquid state, and a dividing section provided between the first storage section and the second storage section and configured to hold back the material, when the material is in a non-molten or free-flowing state and to allow passage of the material from the first storage section into the second storage section, when the material is in a molten or liquid state.

Abstract: A cleaning piston for a mixing head of a reaction moulding machine includes a main part which has a cylindrical casing region, and a clearing part. The material and geometry of the clearing part are designed to remove residual material adhering to a channel of the mixing head. The clearing part is at least partly made of non-polar material.

Abstract: A component feed nozzle includes a housing, which has a component inlet and a component outlet, a piston-shaped closing body, which is slidably supported in the housing and which can be moved back and forth axially. The component outlet is closed by the front end of the closing body in a first position and the component outlet is released or opened in a second position. The component feed nozzle has a membrane seal, which is fastened to the rear end of the closing body and to the housing in such a way that the closing body is completely on one face of the membrane seal. The housing and/or the closing body are designed in such a way that the component reaches all surfaces of the closing body and thus the component pressure is applied to the complete effective surface of the membrane.

Abstract: A melting device includes a container capable of melting a material supplied in a free-flowing state and storing the material in a liquid state. The container includes a first storage section for storing the material in the free-flowing state, a second storage section for storing the material in the liquid state, and a dividing section provided between the first storage section and the second storage section and configured to hold back the material, when the material is in a non-molten or free-flowing state and to allow passage of the material from the first storage section into the second storage section, when the material is in a molten or liquid state.

Abstract: A device and method for applying a reactive mixture comprised of at least two components to a substrate (41) having a spraying device (10) capable of generating a planar, fan-shaped spray jet (18) and a round spray jet (17), and having a means for moving the spraying device relative to the substrate, wherein the spraying device is moved over the substrate in at least two stages, wherein in the first stage, a first application of material (42) is performed with reactive mixture, using the planar, fan-shaped spray jet, on the substrate, and in a further stage a second application of material (43a-c) is subsequently performed with reactive mixture, using the round spray jet, on at least a section of the material applied to the substrate in the first application of material.

Abstract: In a method for producing a shaped part, a closing movement is executed by displacing at least one of two mold halves of a high-pressure resin transfer tool from an open position into a pre-closure position of the resin transfer tool such that an opening gap between the mold halves is sealed air-tight by a sealing device of the resin transfer tool to thereby enclose a cavity. The cavity is evacuated by pumping air out of the cavity, and the closing movement is continued by displacing at least one of the two mold halves from the pre-closure position into a final closure position, in which the mold halves are sealed against one another by a further sealing device to allow filling of the cavity, enclosed by the two mold halves, with resin without leakage during a high-pressure resin transfer molding process.

Abstract: In a method for producing a shaped part, a closing movement is executed by displacing at least one of two mold halves of a high-pressure resin transfer tool from an open position into a pre-closure position of the resin transfer tool such that an opening gap between the mold halves is sealed air-tight by a sealing device of the resin transfer tool to thereby enclose a cavity. The cavity is evacuated by pumping air out of the cavity, and the closing movement is continued by displacing at least one of the two mold halves from the pre-closure position into a final closure position, in which the mold halves are sealed against one another by a further sealing device to allow filling of the cavity, enclosed by the two mold halves, with resin without leakage during a high-pressure resin transfer molding process.

Abstract: A component feed nozzle includes a housing, which has a component inlet and a component outlet, a piston-shaped closing body, which is slidably supported in the housing and which can be moved back and forth axially. The component outlet is closed by the front end of the closing body in a first position and the component outlet is released or opened in a second position. The component feed nozzle has a membrane seal, which is fastened to the rear end of the closing body and to the housing in such a way that the closing body is completely on one face of the membrane seal. The housing and/or the closing body are designed in such a way that the component reaches all surfaces of the closing body and thus the component pressure is applied to the complete effective surface of the membrane.

Abstract: A device and method for applying a reactive mixture comprised of at least two components to a substrate (41) having a spraying device (10) capable of generating a planar, fan-shaped spray jet (18) and a round spray jet (17), and having a means for moving the spraying device relative to the substrate, wherein the spraying device is moved over the substrate in at least two stages, wherein in the first stage, a first application of material (42) is performed with reactive mixture, using the planar, fan-shaped spray jet, on the substrate, and in a further stage a second application of material (43a-c) is subsequently performed with reactive mixture, using the round spray jet, on at least a section of the material applied to the substrate in the first application of material.

Abstract: The present invention relates to an apparatus for producing plastic parts interspersed with reinforcing fibers, with a mixing chamber (20) for producing a mixture of chemically reactive polymer components, with an outlet chamber (38), which is arranged downstream of the mixing chamber and in which a cleaning ram (28) in which a fiber conveying channel (32) is formed is guided in a reciprocatingly movable manner.

Abstract: The present invention relates to an apparatus for producing plastic parts interspersed with reinforcing fibres, with a mixing chamber (20) for producing a mixture of chemically reactive polymer components, with an outlet chamber (38), which is arranged downstream of the mixing chamber and in which a cleaning ram (28) in which a fibre conveying channel (32) is formed is guided in a reciprocatingly movable manner.

Abstract: The present invention relates to a method and a device for producing a coated structure. A support structure is initially introduced into a mold, and subsequently a flooding gap is formed between the support structure and at least one part of the mold. Then, a negative pressure is generated in the flooding gap, and the flooding material is filled into the flooding gap. In order to avoid irregularities during the filling process, it is proposed to control or regulate the negative pressure in accordance with a predetermined pressure profile.

Abstract: A mixing head for mixing at least two reactive starting materials includes a feed passageway for introduction of a high-viscosity starting material, and a return passageway for the high-viscosity starting material for allowing circulation of the high-viscosity starting material. The high-viscosity starting material can be introduced into a mixing chamber for subsequent mixing with a via at least one injection port. A switchover device is provided for selectively establishing a flow communication between the feed passageway and the mixing chamber and a flow communication between the feed passageway and the return passageway, wherein the flow communication between the feed passageway and the mixing chamber is provided upstream of the at least one injection port.

Abstract: The invention relates to a method for producing structures having a compact polyurethane (PUR) sealing layer, particularly for clear coat molding PUR in order to produce a transparent PUR sealing layer on a veneer composite. The structure is placed inside a molding tool inside of which, when closed, a gap exists between the surface of the structure to be coated and the mold inner wall opposite the surface. The components polyol and isocyanate of the compact PUR, optionally provided with additives, are injected via a mixing head and a runner into the molding tool holding the structure. The invention is characterized in that the supply of components is terminated when a predefined pressure Pab (shutoff pressure) in the supply of components and/or in the flow path of the PUR mixture has been reached.

Abstract: A mixing head has traces of the reactive mixture of synthetic resin components removed therefrom by insertion into a housing or rinsing flange into which a rinsing liquid, e.g. hot water, is forced via nozzles or orifices trained inwardly of the plane of the mixing head. The mixture of rinsing liquid and removed residue is passed through a bag filter in which the residue is collected and the rinsing liquid is recirculated.

Abstract: An apparatus for producing a fiber reinforced synthetic resin provides a fiber feed passage through an outer chamber to which the synthetic resin for feed. A feed passage for the fiber extends concentrically in this chamber and has a tubular formation of a diameter less than that of a cleaning piston which is displaceable in the annular space between this tubular formation and the inner wall of the chamber.

Abstract: Through three separate passages opening in a common plane at right angles to one another into a mixing chamber, three components of a reactant polyurethane or polyurea elastomer composition to form in a mold cavity are introduced. One of the components is an aliphatic polyether amine having primary amino function and substantially free from free hydroxyl groups, catalysts with tertiary amino groups, carbon dioxide as a carbamate reactive with the polyether amine and optionally other inert gases and conventional polyurea additives. The second component is a polyisocyanate or prepolymer thereof and the third component C is water. The reacting mixture is formed through a throttle gap into the mold to form low-density foamed products under low fuming conditions and has no unreacted diisocyanates.