Maschinenfabrik Hennecke Gmbh

Ferdinand Proksa

Hans-Michael Sulzbach

Reiner Raffel

Ferdinand Althausen

Willi Schmitzer

Jurgen Wirth

Helmut Duschanek

Gottfried Bucher

Ulrich Osinski

Hans Klonk

Lothar Rohrig

Helmuth Duschanek

Ferinand Althausen

Althausen

Heinz Kisteneich

Hans-Wilhelm Fuhrbach

An apparatus for preparing flowable reaction mixtures from at least two flowable reactants in which the components are injected into a mixing chamber by means of injection nozzles, the force of the reactant acting upon the nozzle needle is at least substantially compensated to avoid impairing the mixing ratio during a change-over of the nozzle needle. The rear end of the nozzle needle is provided with a chamber communicating with the component supply line.

Apparatus for preparing flowable reaction mixtures from at least two

In the production of a flowable reaction mixture of at least two flowable, also not readily miscible, reaction components which react completely with each other to form solid substance or foam material, a rapid abatement of the mixture flow is achieved with a compact type of construction after causing throttling at the discharge of the mixing chamber.

Apparatus for producing a flowable reaction mixture from at least two

In a fine comminution apparatus arranged downstream of a coarse comminution apparatus, polyurethane foam wastes can be comminuted to the desired particle size for recycling as an additive in the production of polyurethane, in a low-dust and energy-saving manner, by carrying out the fine comminution preferably by repeatedly forcing a mixture of the coarsely comminuted material and one of the reaction components through a nozzle or through a plurality of nozzles.

Process and apparatus for reprocessing polyurethane foam wastes, in

A process and apparatus are described for the production of a flowable reaction mixture from at least two flowable reactive components which may be difficult to mix, which components react with one another to form a solid or a foam material. The components are injected into a mixing zone where the components are mixed in a continuous flow. The mixture flowing from the throttling zone is divided into two sub-streams which flow around a piston and which recombine opposite the division point.

Process and apparatus for the production of a flowable reaction mixture

In an apparatus for manufacturing molded plastic articles or for manufacturing hollow foamed articles wherein at least two further mold halves are allowed to cooperate alternately with a first mold half, improved accessibility is achieved and a smaller amount of floor space is required by providing a support structure comprising a vertically arranged support axis which has at least one transverse axis on which the further mold halves are pivotably supported by holding devices.

Apparatus for manufacturing molded plastic articles or for manufacturing

In order to guarantee substantially trouble-free operation when manufacturing sandwich elements on a double conveyor belt installation having a downstream cross cutter and cleaning device, the cleaning device disposed on a transport carriage i) is returned to the carriage of the cross cutter to pick up the next sandwich element, is braked and is then re-accelerated to a speed higher than the production speed, ii) is, after reaching a desired distance.

Apparatus for continuously manufacturing sandwich elements

In order not to have to rinse, during breaks in production, oscillating mixheads such as are used for the manufacture of free-flowing, plastic-forming reaction mixtures, an exchangeable insert part held in position by means of a clip and preferably consisting of plastic material is provided in the mixhead. The insert has a mixing chamber and an outlet channel. This insert part can be disposable or reusable.

Mixhead for mixing at least two free-flowing reaction components

Process and apparatus for continuously manufacturing sandwich elements

A process and apparatus are described for the production of a flowable reaction mixture from at least two flowable reactive components which may be difficult to mix, which components react with one another to form a solid or a foam material. The components are injected into a mixing zone where they components are mixed in a continuous flow. The mixture flowing from the throttle zone is divided into two sub-streams which flow around a piston and which recombine opposite the division point.

The present invention is directed to an apparatus for introducing gas into one of at least two free-flowing components which are subsequently mixed to provide a foam-forming free-flowing mixture by transferring the component to have gas dispersed therein from a supply container to a gas loading area, loading the component with gas and returning the component to the supply area, wherein the gas used in the gas loading area is obtained from a gas cushion maintained in the supply container and wherein the gas is compressed to a pressure higher than the pressure in the gas loading area before it is dispersed into the free-flowing component.

Apparatus for the preparation of a free-flowing mixture of free-flowing

The invention relates to a nozzle for mixing at least two flowable (and in particular foam-forming) reaction components comprising a housing; component supply pipes leading into the housing; a housing bore arranged in the housing having a coaxial outlet channel in its end face; at least one needle casing arranged coaxially in the housing bore; an injection needle guided coaxially in the needle casing; a first chamber arranged between the wall of the housing bore and the needle casing with one of the component supply pipes opening into said first chamber; a second chamber arranged between the needle casing and the injection needle, with another component supply pipe opening into said second chamber; wherein in the closed state, said injection needle forms a tight fit with the internal end face of the needle casing, and the external end face of said needle casing forms a tight fit with the internal end face of the housing bore; and wherein in the open state, said injection needle frees a coaxial nozzle opening of the needle casing and an opening is formed between the external end face of the needle casing and the internal end face of housing bore. The invention also relates to a process for operating this nozzle.

Nozzle for the mixing of at least two flowable reaction components and

In order to keep the reversing times from circulation of the reaction components to mixing and vice versa as short as possible for the purpose of good mixing in the initial and end phases in the preparation of flowable reaction mixtures by high-pressure mixing, the holding pressure applied to the flow reversing element is maintained by a releasable non-return valve until the full hydraulic reversing pressure has built up on the opposite side, and only then is the non-return valve released.

Process and device for the preparation of flowable reaction mixtures

The polygon effect in a double belt conveyor for the continuous production of laminates having a foam core foamed in situ between covering layers is avoided in that the slat belts are provided with guiding rails in the deflection areas, and in that the slat belts are driven by rotating pulling elements. The driving elements of the pulling elements engage on catches which are arranged along the slat belts, only in the sections of straight-line motion of the slat belts.

Double belt conveyor for the continuous production of laminates having a

The present invention is directed to a process and apparatus for introducing gas into one of at least two free-flowing components which are subsequently mixed to provide a foam-forming free-flowing mixture by transferring the component to have gas dispersed therein from a supply container to a gas loading area, loading the component with gas and returning the component to the supply area, wherein the gas used in the gas loading area is obtained from a gas cushion maintained in the supply container and wherein the gas is compressed to a pressure higher than the pressure in the gas loading area before it is dispersed into the free-flowing component.

Process and apparatus for the preparation of a free-flowing mixture made

The invention relates to a nozzle for mixing at least two flowable (and in particular foam-forming) reaction components comprising a housing; component supply pipes leading into the housing; a housing bore arranged in the housing having a coaxial outlet channel in its end face; at least one needle casing arranged coaxially in the housing bore; an injection needle guided coaxially in the needle casing; a first chamber arranged between the wall of the housing bore and the needle casing with one of the component supply pipes opening into said first chamber; a second chamber arranged between the needle casing and the injection needle, with another component supply pipe opening into said second chamber; wherein in the closed state, said injection needle forms a tight fit with the internal end face of the needle casing, and the external end face of said needle casing forms a tight fit with the internal end face of the housing bore; and wherein in the open state, said injection needle frees a coaxial nozzle opening of the needle casing and an opening is formed between the external end face of the needle casing and the internal end face of housing bore.

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Leverkusen, Germany

Ferdinand Proksa