Bayer Aktiengesellschaft

Maschinenfabrik Hennecke Gmbh

Hennecke Gmbh

Other

Bayer Aktiengesellscaft

Wilfried Ebeling

Reiner Raffel

Robert Eiben

Klaus Schulte

Hans-Michael Sulzbach

Ferdinand Althausen

Herbert Steilen

Volker Onnenberg

Alberto C Gonzalez-Dorner

Hansjurgen Rabe

Klaus Nadolski

Bernd Lehmann

Rolf Coblenz

Dieter Evertz

Heinrich Boden

Kurt Krippl

Wilhelm Lamberts

Heinrich Ersfeld

Walter Schneider

James Thompson-Colon

Gunter Hauptmann

Gerd Reffelmann

Dieter Kreuer

Volkmar Tennemann

Jurgen Fietz

A process is described for producing foam materials from two-component reactive plastics using carbon dioxide as blowing agent by mixing at least one of the reactive components with carbon dioxide under pressure, mixing the components, at least one of which contains carbon dioxide under pressure, expanding the reactive mixture containing carbon dioxide obtained by mixing, and hardening, wherein the expansion takes place suddenly with the production of high rates of shear. Preferably the rate of flow of the reaction mixture is reduced after expansion.

Process and device for producing foam using carbon dioxide dissolved under pressure

Process and device for producing foam using carbon dioxide dissolved

Process for foam production using dissolved under pressure carbon dioxide

A process and device for the continuous production of slabstock foam by foaming a polyurethane reactive mixture containing carbon dioxide dissolved under pressure, comprising the steps of

Process for foam production using carbon dioxide dissolved under pressure

A method and device are described for the production of foams from two-component reactive mixtures using carbon dioxide as expanding agent, by mixing at least one of the reactive components with carbon dioxide under pressure. That mixture is then mixed with the other reactive component(s) to form a foamable reactive mixture, which is expanded and cured to form the final product. The foamable reactive mixture is expanded to ambient pressure through at least one fine-meshed screen (21a, 21b, 21c).

Method and device for the production of foam using carbon dioxide

A process and a device are described for the production of polyurethane foam by application of a froth onto the conveyor belt of a block-foam installation, whereby the froth is applied onto the lower conveyor belt in a free, substantially vertical fall and flowing of the froth contrary to the direction of movement of the conveyor belt is prevented by a stationary, substantially vertical barrier arranged transversely on the conveyor belt.

Process and device for continuous production of polyurethane block foam

For the expansion of a liquid containing gas under pressure in dissolved form, it is proposed that the liquid be passed with expansion through an extended flow channel with a small cross-sectional measurement with generation of high rates of shear. The velocity of the liquid is then reduced prior to the foaming.

Apparatus for foam manufacturing using carbon dioxide dissolved under

Method and apparatus for foam manufacture using carbon dioxide dissolved

The variations in the delivery rate of additive caused by fluctuations in a system for the preparation of a polyurethane reaction mixture from flowable reactants and an additive, in particular a blowing agent, are kept within negligible limits by subdividing the supply pipe (4) to the mixing head (6) into a main pipe (8) and a subpipe (9) and introducing the additive into the side stream, which is substantially smaller than the main stream.

Process and apparatus for the preparation of a polyurethane reaction

In devices for the production of a reaction mixture, which forms a foamed plastic, from at least two reaction components and a foaming agent, it is possible to determine the content of foaming agent in a reaction component mixed therewith in that an intermediate container is provided for this mixture. The intermediate container is provided with a circulating line in which are arranged a circulating pump and a temperature-compensating viscometer. Optionally, the foaming agent content can be automatically adjusted to the theoretical value via a computer and pulse lines by influencing the drive means of the dosing pumps for the respective reaction component and the foaming agent.

Device for the production of a reaction mixture

A piston metering device for the production of a plastic material from at least two flowable reaction components. This device is basically composed of (a) a hydraulic driving mechanism, (b) two piston cylinder units, (c) a mixer head and, optionally, (d) a control device common to at least one of the piston cylinder units. This device permits rapid and simple adjustment of the metering ratio of reaction components by adjustment of throughput. Such adjustment is accomplished by means of regulating elements made of hydraulic motors rigidly coupled to one another.

Piston metering device for the production of plastic material from at

The invention relates to a method and a device for producing a reaction mixture from flowable foam-forming or solid-forming components (preferably polyurethane forming components) which are conveyed continuously and are mixed together or are circulated. The quantity to be conveyed is preselected. The injection pressure is preselected and the circulatory pressure is measured for each component. The predetermined quantity and pressure to be conveyed as well as the measured value are preferably fed into a control computer during the circulation and the mixing process and are compared with actual values. Cavities are filled out with the reaction mixture produced and, in particular, molded articles are produced in molds.

Method and a device for the production of a reaction mixture from

Device for the production of a reaction mixture from flowable

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Koln, Germany

Wilfried Ebeling