Abstract: A method of producing a building material uses bast fibers and shives of bast fiber plants as a starting material. The bast fibers and the shives of bast fiber plants are loosened, are metered, and are subsequently fed to an applicator device for liquid additives and/or to a spreading system for solid additives. The bast fibers and the shives of bast fiber plants are subsequently spread in the form of a fleece or a cake.

Abstract: A cast part, for example, for use as an internal coating of a vehicle. The cast part has a bearing layer, which is compressed and made of natural fibers bound together by a binding agent. A decorative layer is disposed on an upper surface of the bearing layer and on a lower surface of the bearing layer, a sealing layer, on which functional elements are molded in the form of fixing clips and reinforcing ribs is disposed. The case part is made according to a process consisting in compressing a natural fiber matting containing a binding agent into the bearing layer having either a plane surface or a contour and, in a second forming step, shaping the decorative material located in a upper half of a forming tool as well as a thermoplastic material applied to a lower half of the forming tool for forming the sealing layer and the functional element formed therefrom.

Abstract: A blow molding part with a decorative coating is produced in a three-stage process. The blow molding part is initially produced without a coating in a blow mold tool cavity, and is then molded against the decorative coating material in a second blow-molding operation under low pressure and at a low temperature in a decorative coating cavity. The decorative coating material is heated up if appropriate and is placed in advance against a mold contour. The blow mold tool includes a middle part, which is provided between two movable side parts and can be moved or pivoted out. Mold contours of the middle part form with the mold contours of the side parts the blow mold tool cavity and the decorative coating cavity. The blow mold tool cavity has holding devices for the blow molding part. The decorative coating cavity has suction openings and heating elements for molding the decorative coating material and heating it up.

Abstract: A method of producing components with surface decoration, by which even difficult surface geometries can be produced with a satisfactory visible surface, includes prefabricating a sheet-like molding with a desired surface contour in a prior step. The prefabrication is carried out in a contour-defining preforming mold or in a contour-defining production mold. The prefabrication of the sheet-like molding may be carried out, for example, by spraying a material onto a surface of the separate contour-defining mold or of the production mold. The surface decoration may be coated on a rear side with a compact or expanded material and subsequently preformed.

Abstract: A method for the blow molded production of double-walled components coated with a decorative material includes pressing an extruded plastic tube together with a decorative material into a component and simultaneously creating a pinched region on the component at the die separation region, placing the pinched region at a distance from the component side edge by displacing the die separation region, preferably with a slide, and, after the component is removed from the die, connecting a decorative material to the component around the side edge. Also provided is a blow molding die for performing the method. The die includes first and second die halves defining a die separation region therebetween, a slide disposed at the die separation region, movable in longitudinal and transverse directions with respect to the die separation region.

Abstract: The composite material can be produced without complicated measures to fix the distance between the covering layers and it can be brought into a desired three-dimensional contour. The composite material has a first outer covering layer and, at a distance from it, a second outer covering layer, in particular of metal, plastic or wood veneer. An intermediate layer is arranged between the covering layers. The intermediate layer is formed by at least one natural fiber mat of renewable raw materials which is interspersed with fusible and/or foamable particles and/or curable substances.

Abstract: A method for fabricating synthetic-material molded parts through extrusion blow molding, produces sharp-edged, strong contours and/or undercuts in the region of break-throughs. A synthetic-material tube introduced into the blow-molding die is initially widened by pneumatic pressure, shaped and held on smooth or slightly contoured surfaces of the blow-molding die. However, strong, sharp-edged contours are shaped by mechanical pressure exercised on an outer surface of the synthetic-material tube by a shaping tool. A device for carrying out the process has a blow-molding die with a wall in which shaping slides are guided in one or more parts that can be guided in the interior of the blow-molding die and have sliding parts which can be driven independently of each other or in synchronism.

Abstract: A process for producing a plastic blow-molded part. A plastically deformable plastic parison with a first subregion and an opposite second subregion is placed between a molding element having a projecting region and a mold interacting with the molding element. A positive pressure is generated between the molding element and the first subregion and within the parison, to keep the first subregion at a distance from the molding element and to keep the first and second subregions at a distance from each other. A stretching region of the first subregion is preformed by moving the molding element in relation to an edge region in the direction of the mold and by generating a negative pressure between the projecting region and the stretching region of the first subregion. The subregions are deformed for generating a positive pressure within the parison.

Abstract: A method for the fabrication of synthetic-material component assemblies includes blow-molding synthetic-material components having a foam-backed decorative layer on part of their surface. Decorative material is initially pressed against a foam layer having one surface which has been heated and melted. During blow-molding of the component from an extruded synthetic-material tube, a composite decorative element produced in this way is pressed against an outer surface of the component and joined by fusion welding. The composite decorative element can either be performed in accordance with the contours of the component or have a flat structure, in which case it can be shaped, possibly with additional heating, together with the component during blow-molding.

Abstract: A covering part, in particular for sheet-metal supporting parts in motor vehicles, includes a one-piece, profiled hollow section which is produced by blow molding and can be secured exchangeably in the sheet-metal supporting part. The rear side of the hollow section has fastening elements to which corresponding sockets in the sheet-metal supporting part are assigned. It is possible for the rear side to have profilings which are disposed in sections in the longitud-inal direction. The fastening elements can be integrated in a cavity and the cavity filled with foam. The structure according to the invention ensures that energy is adequately absorbed, in particular when the cavity is filled with foam. In the event of an impact, the hollow section is basically not subject to any deformation.

Abstract: The invention relates to a tool which enables articles to be deep-drawn without difficulty, even when the material used is of low elasticity and/or when a decorative sheet is used to produce a composite article. The tool includes a die which has a recessed zone which extends between a die opening and a die contour or an undercut. The recessed zone is delimited on one side at right angles to an end of the die. In order to hold decorative sheet in place, a mounting is fitted on a part of the recessed zone facing the end of the die.

Abstract: A method for foaming or foam-coating components is used for foaming hollow cavities of double-walled or multiple-walled components or foam-coating component parts with decorative surfaces so as to improve haptic properties of component parts. A material is introduced or applied in an unfoamed state to be foamed through the use of microwave energy. In order to achieve high dielectric losses and to ensure that the heat effect is evently distributed and essentially restricted to the material to be foamed, the material is adjusted in a polar manner by addition of certain substances such as conductive soot. Reflecting agents are used to improve the distribution and effect of the microwaves. The method ensures fully foamed hollow cavities and foam layers of uniform thickness. A foamable material for foaming or foam-coating components is also provided.

Abstract: A wall or structural element, preferably for the body or parts of the body of motor vehicles, is formed for dissipating impact forces and introducing them into the load-bearing parts of the body of the motor vehicle. The wall or structural element is a composite element formed of a thin-section wall part and a molding which is bonded to the latter over its full surface area. The molding being composed of reinforcing elements fixed in a foamed binder. The reinforcing elements are derived from renewable raw materials in cut or uncut form, preferably monocotyledons or dicotyledons. Two or more composite elements, in each case having wall parts and moldings, may be bonded to one another to form a joint component, for example a motor vehicle door.

Abstract: A covering part, in particular for sheet-metal supporting parts in motor vehicles, includes a hollow section formed by blow molding. The hollow section has a cavity filled with foam material. The foam material is placed in the cavity in powder form, granular form, or paste form and is foamed by a thermal action. The structure according to the invention ensures that impact energy is adequately absorbed. A method for producing the covering part is also provided.

Abstract: A building material includes shives, previously considered to be a waste material. Shives of bast fibers are added to bast fibers and a binder. The shives may contain fibers which are still partially attached to the shives with their natural bond. These partially attached fibers project laterally from the shives in an irregular fashion and are between 2 mm and 100 mm long. The shives and the loose fibers and/or the shives with the partially attached fibers are fed into a coating device for liquid additives and/or into a spreading system for solid additives, and subsequently form a fleece or cake. An air flow may be used for performing a mechanical felting of the fleece. A method and an apparatus for producing the building material are also provided.

Abstract: A method and devices for coating a carrier part make it possible to coat the carrier part formed of a less expensive material with a higher-quality and thus more-expensive material in only a defined region. As a result, novel properties attainable by the coating, such as improving hardness or resistance or varying color or appearance, finally exist only in the region where it is actually needed. Therefore, the coating material is fed in through one or more associated feeding devices, below a distributor head, in a preliminary tube that is already provided with the carrier material, in one or more angular regions relative to the horizontal axis of the preliminary tube. At least one distributor element that has adjustable segments is disposed below the rotatably disposed distributor head. The segments are provided with profiled sections for providing different wall thicknesses.

Abstract: A method for foaming or foam-coating components is used for foaming hollow cavities of double-walled or multiple-walled components or foam-coating component parts with decorative surfaces so as to improve haptic properties of component parts. A material is introduced or applied in an unfoamed state to be foamed through the use of microwave energy. In order to achieve high dielectric losses and to ensure that the heat effect is evently distributed and essentially restricted to the material to be foamed, the material is adjusted in a polar manner by addition of certain substances such as conductive soot. Reflecting agents are used to improve the distribution and effect of the microwaves. The method ensures fully foamed hollow cavities and foam layers of uniform thickness. A foamable material for foaming or foam-coating components is also provided.