Agitating – Stationary deflector in flow-through mixing chamber
Patent
1996-12-05
2000-06-27
Cooley, Charles E.
Agitating
Stationary deflector in flow-through mixing chamber
206219, 2221456, B01F 506
Patent
active
060798718
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a device for combining at least two fluid media comprising at least one first chamber designed to be filled with a first fluid medium and at least one flow region which is designed to be attached in the vicinity of an opening of the first chamber, being connected thereto, and to accommodate the first fluid medium issuing from the first chamber and to transport it to an outlet opening of the flow region and to a method for producing a strand of product by combining at least two separately stored fluid media.
DISCUSSION OF RELATED ART
In many applications, the problem of combining at least two separately stored fluid media in such a way that they are mixed together immediately before application to form a multicomponent system arises. Examples include the combination of the two components of so-called two-component adhesives and the mixing of sealing compounds with colouring substances. Broadly speaking, this problem may be summarized to mean that at least one second fluid medium has to be added to a first fluid medium to modify the properties of the fluid media, for example their viscosity, mechanical and/or chemical properties, appearance or physical states. The media may be two-component or multicomponent systems, although they must be capable of flow in accordance with the invention, their optionally different viscosity being of secondary importance.
Numerous formulations for one-component or multicomponent sealants and/or adhesives are already known, being used for bonding and/or sealing structural components of metal, wood, glass or plastics in vehicle construction, aircraft construction or general machine construction. Users generally prefer one-component systems because they can be used with simple applicators and because they are not susceptible to mixing or metering errors which can adversely affect the final properties of the bond or seal. In many cases, however, the reaction rate of one-component systems is not sufficient to build up the required ultimate strength or even a minimum strength, so that conventional two-component systems are still used in cases such as these. In order to reduce the effects of possible mixing errors, the two components have equally large volumes and viscosities. However, this means that special two-component application systems are required for such two-component systems. Examples of two-component application systems are the co-axial cartridges preceded by a static mixer which are available under the name of "Supermix" from Liquid Control. In addition, two-component systems comprising two parallel cartridges and one dynamic mixing head are known, for example from EP-B-313519 and EP-B-351358. DE-A-4202591 describes a method for premixing at least two pastes on introduction into a mixer, in which the strands of paste delivered to the mixer form thin adjacent layers. One feature common to all these two-component systems is that special applicators are required for their application.
It is known that two fluid media/components can be combined, for example, by specially designed devices comprising two adjacent cylindrical chambers filled with different fluid media. These chambers open into a common outlet opening onto which a suitable mixer, for example a static mixer, can be fitted. The two media to be combined are expressed from the cylindrical chambers of the device under pressure by plungers and emerge from the outlet opening in the form of a single strand formed by the combined media. The strand then enters the following mixer in which it is mixed to form a uniform final medium before emerging from the outlet opening of the mixer for application.
Containers filled with special dental care formulations are also known, being filled with at least two different, flowable and optically different dental care components. Through the design of the container, dental components stored one above the other in the container leave the outlet opening in the form of a single strand in which the dental care components in contact wit
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Jonas Konrad H.
Langendorf Klaus
Maier Hansjoerg
Cooley Charles E.
Henkel-Teroson GmbH
Jaeschke W. C.
Ortiz Daniel S.
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