Daimler Chrysler Ag

Daimler Ag

Daimler-benz Ag

Diamler Chrysler Ag

Ralph Greiner

Thomas Foelster

Benno Stamp

Michele Melchiorre

Sebastian Iwan

Hubert Bieder

Wolfgang Nendel

Tino Zucker

Tobias Blumenstock

Dirk Schaefer

Bjorn Stuckrad

The present invention relates to a sandwich component, which comprises a honeycomb core () having a plurality of webs (') and at least one cover layer (), wherein the honeycomb core () is made of a cellulose-based material, in particular paper. The cover layer () is formed from a fiber-reinforced semifinished product having a thermoplastic material matrix, wherein the webs (&#x2032;) of the honeycomb core () are partially received into the thermoplastic material matrix of the cover layer () at connection points (A) to the cover layer () so that the sandwich component is bonded. The invention further relates to production methods for the sandwich component.

Sandwich component and method for the production thereof

A process for the preparation of fiber-reinforced plastic molding includes (1) shortening the fibers to a length of less than 30 mm; (2) introducing the fibers and the plastics present in the solid state, separately from one another, into a mixing chamber of a die press, wherein the plastic is in particulate form; (3) thoroughly mixing the plastic and fibers to give a solids mixture; (4) transporting the solids mixture through die orifices of the die press; (5) heating the solids mixture in the zone before or in the orifices of the die; (6) enclosing at least part or partly embedding the fibers by the plastic during or after the heating of the solids mixture; and (7) comminuting the granulated material for subsequent molding.

Process for making a plastic material

A fiber-reinforced molded plastic part, a process for its manufacture and a use. The fiber-reinforced molded plastic part consists of a plastic matrix with natural fibers particularly arranged in a uniformly distributed manner in the plastic matrix. The plastic matrix has at least two mutually mixed polymers, of which one is a biopolymer and the other is a polymer which is at least largely resistant to biological stress.

Fiber-reinforced molded plastic part and process for its manufacture

A method and apparatus for the single type recovery of plastic materials from starting pieces of a multiple composite material is disclosed. The starting pieces are firstly comminuted mechanically into particles of a size compatible with the process. These composite materials particularly are separated and a mixture of different materials is produced and, from this material mixture, the individual materials are isolated. For the recovery of starting pieces of prepreg fabric from flexible cutting residues, lined with films on both sides, the following steps are performed in sequence. First, the starting pieces are comminuted by cutting them up into shreds of composite material. Then the shreds of composite material are cooled down to temperatures below room temperature and, in a cold state, are subjected to a mechanical alternating bending stress and/or a shearing stress, the films becoming detached from the prepreg pieces in a scale-like manner to form a mixture. This mixture of film clippings and free prepreg pieces is subjected to a wet, density-selective flotation-like float and sink separation, the films floating and the free prepreg pieces sinking.

Method and apparatus for dividing and separating self-adhesive composite

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Leonberg, Germany

Ralph Greiner