Agitating – By movement of support for removable mixing chamber – Mixing chamber secured to support
Reexamination Certificate
1998-02-27
2001-06-05
Soohoo, Tony G. (Department: 1723)
Agitating
By movement of support for removable mixing chamber
Mixing chamber secured to support
C366S232000, C366S224000
Reexamination Certificate
active
06241380
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a mixer for any granular or particulate material of any granule or particle size, such a powders, grit-size material etc, which optionally may have liquids added thereto, as well as pastes, especially PVC paste. The mixer comprises a first mixing container portion that is pivotable about an axis positioned at an angle to the longitudinal axis of the mixing container portion and a second mixing container portion in which the mixed product, after separation from the first mixing container portion, is located for further use. The present invention also relates to a method for performing a mixing process in the inventive mixer.
Mixers having a mixing container consisting of two mixing container portions are known. In such mixers, the bottom mixing container portion into which the material to be mixed has been filled is connected to a second mixing container portion having a mixing tool and, subsequently, the mixing container is rotated by 180° relative to a horizontal axis so that the mixing tool is now at the bottom. In this upside down position, in which the mixing tool rotates about a vertical rotary axis, the mixing process is performed. After completion of the mixing process, the mixing container is again rotated about the horizontal axis into its initial position in which the mixing container portion containing the mixed material can be separated from the other parts of the mixer.
From European Patent 0 269 799 B1 a mixing device is known in which a mixing container is provided comprised of two bowl-shaped mixing container portions that are connectable to one another. The mixer comprises a stationary holder at which one of the mixing container portions of the mixing container is rotatably supported so as to be pivotable about a horizontal support axis and wherein the second container portion has a mixing tool whose shaft in the mixing position is vertical.
In such mixers the mixing tool must be rotated at a high rpm in order to ensure that the material is sufficiently mixed. The material to be mixed is forced upwardly at the inner walls of the mixing container. This causes heating of the material to be mixed. This undesirable temperature increase is counteracted by cooling measures, for example, cooling of a double wall outer mantle of the mixing container. This requires a considerable additional expenditure, and may result in an undesirable change of the product properties because heating of the mixed material during mixing cannot be completely avoided.
It is therefore an object of the present invention to improve a mixer of the aforementioned kind such that an excellent mixing of the material can be performed in a short period of time without causing temperature-based undesirable changes of the material properties.
SUMMARY OF THE INVENTION
The mixer for granular materials according to the present invention is primarily characterized by:
a mixing container comprised of a first mixing container portion and a second mixing container portion detachably connected to one another;
the mixing container having a longitudinal axis and a transverse axis extending perpendicularly to the longitudinal axis;
a support frame in which the mixing container is supported so as to be pivotable about the transverse axis and rotatable about the longitudinal axis;
the mixing container having a first position in which mixing is performed and the second mixing container portion is positioned above the first mixing container portion;
the mixing container having a second position in which the second mixing container portion, after completion of mixing, contains the mixed material and is detachable from the first mixing container portion.
Advantageously, the mixer further comprises a pivot bracket comprising a rotary bearing. The mixing container is supported by the rotary bearing in the pivot bracket for rotation about the longitudinal axis. A shaft is fixedly connected to the pivot bracket and rotatably supported in the support frame, wherein the mixing container is connected to the shaft.
Advantageously, the rotary bearing is a roller bearing.
Preferably, the first mixing container portion has a rotating mixing tool comprising radially extending mixing blades, wherein the mixing blades end in direct vicinity of a container wall of a first mixing container portion.
Advantageously, the mixing blades, in the direction of rotation of the mixing tool, are downwardly and forwardly slanted at least in a radially outer portion of the mixing tool.
Preferably, the first mixing container portion has a rotating mixing tool comprising mixing blades spaced from a container wall of the mixing container portion. The mixing blades, in a direction of rotation of the mixing tool, are preferably downwardly and forwardly slanted at least in a radially outer portion of the mixing tool.
Preferably, the first mixing container portion comprises a cover closing of the interior of first mixing container portion for enclosing in the interior a granular cleaning substance.
The present invention also relates to a method for mixing granular material, wherein the method is primarily characterized by the steps of:
providing a mixing container comprised of a first mixing container portion and a second mixing container portion detachably connected to one another, wherein the mixing container has a longitudinal axis and a transverse axis extending perpendicularly to the longitudinal axis;
supporting the mixing container on a support frame such that the mixing container is pivotable above the transverse axis and rotatable about the longitudinal axis;
filling a granular material into the second mixing container portion and connecting the second mixing container portion to the first mixing container portion; pivoting the mixing container into a first position in which the longitudinal axis is slanted relative to a vertical position and in which the second mixing container portion is positioned above the first mixing container portion;
rotating the mixing container positioned in the first position for mixing the granular material;
after completion of mixing, positioning the mixing container in a second position such that the second mixing container portion contains the mixed material and detaching the second mixing container portion from the first mixing container portion.
The invention also relates to a method for mixing granular material characterized by the steps of:
providing a mixing container comprised of the first mixing container portion and a second mixing container portion detachably connected to one another, wherein the mixing container has a longitudinal axis and a transverse axis extending perpendicularly to the longitudinal axis;
equipping the first mixing container portion with a mixing tool comprising radially extending mixing blades ending in direct vicinity of the container wall of the first mixing container portion;
supporting the mixing container on a support frame such that the mixing container is pivotable about the transverse axis and rotatable about the longitudinal axis;
filling a granular material into the second mixing container portion and connection the second mixing container portion to the first mixing container portion;
pivoting the mixing container into a first position in which the longitudinal axis is vertical and in which the second mixing container portion is positioned above the first mixing container portion;
rotating the mixing container positioned in the first position and the mixing tool for mixing the granular material;
after completion of mixing, positioning the mixing container in a second position in such that the second container portion contains the mixed material and detaching the second mixing container portion from the first mixing container portion.
Preferably, in the step of rotating, the mixing container and the mixing tool are rotated in opposite directions.
The mixing tool is preferably rotated at a higher speed than the mixing container.
According to the present invention, the mixing container comprised of a first and a
Bornemann Hans-Joachim
Greiling Andre
Robert W. Becker & Associates
Soohoo Tony G.
Thyssen Henschel GmbH
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