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EP 1 857 184 A2 |
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EUROPEAN PATENT APPLICATION |
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Date of publication: |
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21.11.2007 Bulletin 2007/47 |
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Date of filing: 17.05.2007 |
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(51) |
International Patent Classification (IPC):
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(84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO
SE SI SK TR |
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Designated Extension States: |
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AL BA HR MK YU |
(30) |
Priority: |
19.05.2006 IT NA20060062
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(71) |
Applicant: Migliaccio, Patrizia |
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80028 Grumo Nevano NA (IT) |
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(72) |
Inventor: |
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- Migliaccio, Patrizia
80028 Grumo Nevano NA (IT)
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(54) |
Powder and granular materials doser through a flux splitting |
(57) The following invention is referred to an equipment to dose powders (A) and/or granular
materials to be used in industrial or civil applications.
The equipment is based on a main flux of powder or granular materials splitted in
a secondary flux (E) via a calibrated hole (C). In such a way the secondary flux (E)
is moved out of the container to obtain a precise dosing of the material.
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[0001] The precise dosing of powders and of granular materials is one of the main problems
for a lot of industrial processes or civil applications.
[0002] The off-the-shelf dosers are based on consolidated techniques like cochlea, vibration,
and several volumetric systems. Each these methods has problems with powder microdosing
or granular materials which are susceptible of clotting. To solve this problems are
used complex techniques which have high costs.
[0003] This invention is referred to a dosing equipment for powder and granular materials,
mentioned in the following as "dosing materials", to be used in industrial and civil
applications.
[0004] Every powder and granural material acts as a not Newtonian fluid. If you fluidify
these materials, their behaviour is similar to liquid behaviour. The figures show
the behaviour principle of the equipment.
[0005] In figure 1, the dosing material (A) is in a container (B) with a small hole (C)
on one of the walls. The material (A) cannot go out, since the hole is too small in
this situation.
[0006] In figure 2, the dosing material (A) is fluidified (D) in proximity of the hole (C).
The material flows through the hole (C) in a stabilized small quantity (E).
[0007] This very simple and efficient principle is the base of this invention.
[0008] On figure 3, it can be seen a practical example of equipment realization. The dosing
material (A) is within the container (B) and it is shaked by a shovel (H) moved by
a motor (I) to break every clots. In such a way, it is guaranteed homogeneously and
constantness of dosing material on the rotating element (F) moved by the motor (G).
The movement of the rotating element (F) creates a main rotating flux of the dosing
material. The main flux is divided in a secondary flux (E) through a calibrated hole
(C) at a specific distance and positon. The secondary flux (E) output the dosing material
of the equipment.
[0009] The equipment enable a continous regolation of output mass flow in two modes: changing
the main flux capacity through the speed regulation of the rotating element (F) or
changing position, dimension and geometry of output hole (C). The easy method is to
fix the dimension and position of output hole (C) and regulates the capacity through
the speed of the rotating element (F).
[0010] All elements must be properly dimensioned to apply the principle of this invention
in function of granulometry, phisical and fluidodynamic characteristics of dosing
material and the desired output flux.
[0011] The calibrated aperture of the equipment can be fixed or interchangable and with
fixed area or at variable geometry. This enable several range of capacities and the
equipment can be adapted to specific phisical and fluid dynamic characteristic of
dosing material.
[0012] The figures show an example with one main rotating flux and only one output hole,
but it is possible to be applied to every type of flux and to every number of output
holes.
1. Powder and granular material dosing equipment which uses a main flux splitted into
one or more secondary fluxes through one or more calibrated holes.
2. A dosing equipment as in claim 1 with the main flux that could be rotating, linear
of any other types
3. A dosing equipment as in claim 1 with any type of calibrated holes, fix or interchangable,
with a fixed area or variable geometry to adapt the equipment to different mass flows,
to different types of powders or granulometry, and to different physical and fluid
dynamics characteristics of the dosing material
4. A dosing equipment with the possibility to change the output mass flow regulating
the main mass flow.
5. A dosing equipment with the possibility to regulate the output mass flow, changing
position, size, and shape of output holes