Hennecke Gmbh

Adcuram Maschinenbauholding Gmbh

Wolfgang Pawlik

Hans-Michael Sulzbach

Reiner Raffel

Helmut Eckardt

Jürgen Wirth

Martin Schamberg

Florian Thiebes

Ingo Kleba

Michael Begemann

Lothar Röhrig

J&uuml;rgen Wirth

Dominik Obeloer

Frank Berghahn

Andreas Petersohn

Klaus Sieben

Oliver Girnstein

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.

Method and device for the production of moulded pieces from a layer of polyurethane

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.

Process for producing polyurethane moldings

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.

Method for mixing a polyol component and an isocyanate component

Plastic moldings reinforced with long fibers are made without the risk of forming loops in a continuous thread or roving fed to a cutting unit at the end of a mold filling operation or tearing thereof during renewed start-up for the next molding filling operation, even at a relatively high take-off speed of the continuous thread. This is achieved by keeping the continuous thread permanently under tension pneumatically against the conveying direction. The device useful for carrying out this process is equipped with at least one tensioning air inlet in the guide for the continuous thread or roving.

Device for the production of moldings of plastic reinforced with long fibers

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Kö'ln, Germany

Wolfgang Pawlik