WO2008149190A1 - Dosing apparatus and process for mixing materials contained in a plurality of hoppers - Google Patents

Dosing apparatus and process for mixing materials contained in a plurality of hoppers Download PDF

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Publication number
WO2008149190A1
WO2008149190A1 PCT/IB2008/001209 IB2008001209W WO2008149190A1 WO 2008149190 A1 WO2008149190 A1 WO 2008149190A1 IB 2008001209 W IB2008001209 W IB 2008001209W WO 2008149190 A1 WO2008149190 A1 WO 2008149190A1
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WO
WIPO (PCT)
Prior art keywords
previous
hoppers
dosing apparatus
hopper
mixing collector
Prior art date
Application number
PCT/IB2008/001209
Other languages
French (fr)
Original Assignee
Syncro S.R.L.
Caccia, Gabriele
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Syncro S.R.L., Caccia, Gabriele filed Critical Syncro S.R.L.
Publication of WO2008149190A1 publication Critical patent/WO2008149190A1/en

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D11/00—Control of flow ratio
    • G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
    • G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
    • G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
    • G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/805—Mixing plants; Combinations of mixers for granular material
    • B01F33/8051—Mixing plants; Combinations of mixers for granular material with several silos arranged in a row or around a central delivery point, e.g. provided with proportioning means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/40—Mounting or supporting mixing devices or receptacles; Clamping or holding arrangements therefor
    • B01F35/41—Mounting or supporting stirrer shafts or stirrer units on receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
    • B01F35/881—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise by weighing, e.g. with automatic discharge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/60—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material
    • B29B7/603—Component parts, details or accessories; Auxiliary operations for feeding, e.g. end guides for the incoming material in measured doses, e.g. proportioning of several materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B29B7/72—Measuring, controlling or regulating
    • B29B7/728—Measuring data of the driving system, e.g. torque, speed, power, vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/78—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant by gravity, e.g. falling particle mixers

Definitions

  • the present invention relates to a dosing apparatus for granular materials or the like, and in particular to a dosing apparatus comprising a plurality of gravimetric hoppers, each being measured by at least one load cell for measuring the weight loss of the mixture component contained therein.
  • the present invention also relates to a dosing process which can be carried out by means of said apparatus.
  • Dosing apparatuses for granular materials or the like which are known in the art, comprise a hopper divided into compartments containing materials to be mixed which are dosed by discharging them in sequence on a scale with a load cell where they are weighted, together with the materials already loaded on the same scale. The materials are let out from the hopper through at least one suitable outlet regulated by suitable closure means.
  • Dosing apparatuses for granular materials or the like which are also known in the art, comprise a plurality of hoppers, each suitable for containing a component of the mixture to be produced. Similarly to the above mentioned apparatuses, the single components are dosed by discharging them in sequence on a scale where they are weighted.
  • Said dosing apparatuses and processes are called "weight sum" since every component of the material to be mixed is weighted once it has reached the other components on the scale, thereby being summed to their weight.
  • this quantity is dosed by estimating the opening time of the closure means of the outlet, namely the fall time necessary to the component for coming out of the hopper and reaching the scale where it is weighted.
  • the measurement is therefore approximated and strongly dependent on the granulometry and the weight of the material, which are parameters which influence the fall time.
  • This kind of dosing apparatuses has therefore the disadvantage of not allowing the preparation of precise mixtures.
  • each hopper containing a component of the mixture to be made up is constantly weighted by means of a load cell, the weight loss of each single hopper is measured while the component contained therein is discharged in a mixing collector and thus a measured weighing, correct and not hypothetic, is always assured.
  • the mixture obtained by means of the dosing apparatus and process according to the present invention does not require any further correction, which should for example made with subsequent additions of one or more components, which a consequent remarkable waste of time.
  • Another advantage of the apparatus and the process according to the present invention is that, since the components to be mixed are weighted by directly measuring the weight of the single hoppers, a scale or the like which measures the weight of the mixture before and after the addition of every single component to the mixture is not necessary anymore. The mixture can then be collected in a mixing collector remarkably less expensive than a scale. In addition, in the dosing apparatuses of the known art said scale must have a remarkable size if several components have to be weighted.
  • the dosing can occur in much faster times with respect to the known art since the quantities of the materials to be mixed can be measured and mixed simultaneously, contrary to what may happen in the sequential dosing carried out by the apparatus of the known art. It should be noticed that said sequential weight-sum dosing apparatuses of the known art are even slower when the number of material to be mixed increases, since an additional pause is necessary for taking the load cell of the scale back to stationary conditions by damping the vibrations caused by the opening and the closing of the scale.
  • the mixing of the flows of the different components is improved by dosing simultaneously the components to be mixed and by discharging them directly into the mixing collector.
  • the material contained in the hoppers is discharged in batches into the mixing collector and the maximum level of each batch of material is changed by a control unit for controlling the discharge frequency of the batches from the hoppers to the mixing collector.
  • the precision of the load cells can be advantageously differentiated according to the quantity of material discharged from the relevant hoppers, so as to accurately dose also the material discharged in small percentages, since the measurement is not influenced by the material discharged in large percentages.
  • the dosing apparatus comprises in a known way a plurality of hoppers 1, 2, 3, 4, 5, 6.
  • Each hopper 1, 2, 3, 4, 5, 6 is suitable for containing a material to be mixed with other materials which can be contained in the remaining hoppers and is provided with an outlet 7, 8, 9, 10, 11 on bottom 12, 13, 14, 15, 16 of hopper 1, 2, 3, 4, 5, 6 (the outlet of hopper 6 is not visible in the figures).
  • the dosing apparatus also comprises a mixing collector 17 arranged below hoppers 1, 2, 3, 4, 5, 6, which is suitable for receiving the materials which are discharged by gravity from outlets 7, 8, 9, 10, 11 of hoppers 1, 2, 3, 4, 5, 6.
  • the dosing apparatus further comprises in a known way at least one load cell for measuring the material to be mixed.
  • the dosing apparatus is provided with at least one load cell 18, 19, 20, 21, 22 which is mechanically connected, in particular is arranged under each hopper 1, 2, 3, 4, 5, 6, so that the weight of the latter is loaded on said load cell 18, 19, 20, 21, 22.
  • the weight of each hopper 1, 2, 3, 4, 5, 6 can thus be measured constantly and individually and the weight loss of each single hopper can then be measured while .the component contained therein is discharged into mixing collector 17, which is in turn mechanically connected to a further load cell (not shown in the figures) for measuring the weight, namely the quantity, of the materials contained therein.
  • At least one hopper 1, 2, 3, 4, 5, 6 of the dosing apparatus according to the invention has a converging bottom 12, 13, 14, 15, 16, whose outlet 7, 8, 9, 10, 11 directly rests on load cell 18, 19, 20, 21, 22.
  • the load cells are arranged above the hoppers, so as to measure their weight by traction.
  • Outlet 7, 8, 9, 10, 11 of at least one hopper 1, 2, 3, 4, 5, 6 is connected to a duct
  • outlet end 28, 29 which is arranged above mixing collector 17.
  • Said outlet end 28, 29 is provided with closure means 31, 32, 33, 34, in particular shutters which are mounted in a slidable manner on substantially vertical guides and are driven by pneumatic pistons 35, 36, 37, 38.
  • a first hopper 1 is preferably arranged over mixing collector 17, while the remaining hoppers 2, 3, 4, 5, 6 are arranged around said first hopper 1.
  • Mixing collector 17 can . be supported by a cylindrical frame 39 to which first hopper 1, arranged over mixing collector 17, is fixed.
  • Hoppers 2, 3, 4, 5, 6 arranged around said first hopper 1 are supported by ducts 23, 24, 25, 26 whose outlet end 28, 29 is arranged over mixing collector 17 and which are fixed to frame 39.
  • the latter can be provided with a transparent portion 40, 41 , 42, 43 on their outer surface.
  • load cells 18, 19, 20, 21, 22 continuously send to an electronic control unit (not shown in the figures) signals corresponding to the weights of the materials contained in hoppers 1, 2, 3, 4, 5, 6, so as to measure the quantity of material discharged by the latter.
  • the control unit is also connected to the load cell of mixing collector 17 so as to open or close outlets 7, 8, 9, 10, 11 according to the signals sent by this load cell, namely according to the weight of the material contained in mixing collector 17.
  • pneumatic pistons 35, 36, 37, 38 are connected to the control unit.
  • the signals sent by the load cell of mixing collector 17 allow to measure the quantity of material contained in the latter, so that the electronic control unit can be connected to a device arranged downstream for controlling the apparatus according to the .working of such, device.
  • each batch of material in mixing collector 17 can be changed by the control unit for controlling the opening/closing frequency of outlets 7, 8, 9, 10, 11, namely the discharge frequency of the material from hoppers 1, 2, 3, 4, 5, 6 to mixing collector 17 for obtaining a batch of material.
  • the control unit calculates a threshold value of the weight measured by the load cell of mixing collector 17, exceeding which it closes outlets 7, 8, 9, 10, 11. Such a threshold value is calculated for keeping the frequency of the batches above a minimum value, so as to obtain a precise and timely control of the discharge of the material supplied by the apparatus to the device arranged downstream.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Medicinal Preparation (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Dosing apparatus comprising at least one load cell (18, 19, 20, 21, 22) and a plurality of hoppers (1, 2, 3, 4, 5, 6), each hopper (1, 2, 3, 4, 5, 6) being suitable for containing a material to be mixed with other materials which can be contained in the remaining hoppers (1, 2, 3, 4, 5, 6) and being provided with an outlet (7, 8, 9, 10, 11), a mixing collector (17) being arranged below the hoppers (1, 2, 3, 4, 5, 6) for receiving the materials which are discharged by gravity from the outlets (J, 8, 9, 10, 11) of the hoppers (1, 2, 3, 4, 5, 6), which are mechanically connected to load cells (18, 19, 20, 21, 22) for measuring individually the weights of the materials contained in each hopper (1, 2, 3, 4, 5, 6). The present invention also relates to a dosing process which can be carried out by means of said apparatus.

Description

DOSING APPARATUS AND PROCESS FOR MIXING MATERIALS CONTAINED IN A PLURALITY OF HOPPERS
The present invention relates to a dosing apparatus for granular materials or the like, and in particular to a dosing apparatus comprising a plurality of gravimetric hoppers, each being measured by at least one load cell for measuring the weight loss of the mixture component contained therein. The present invention also relates to a dosing process which can be carried out by means of said apparatus.
Dosing apparatuses for granular materials or the like, which are known in the art, comprise a hopper divided into compartments containing materials to be mixed which are dosed by discharging them in sequence on a scale with a load cell where they are weighted, together with the materials already loaded on the same scale. The materials are let out from the hopper through at least one suitable outlet regulated by suitable closure means.
Dosing apparatuses for granular materials or the like, which are also known in the art, comprise a plurality of hoppers, each suitable for containing a component of the mixture to be produced. Similarly to the above mentioned apparatuses, the single components are dosed by discharging them in sequence on a scale where they are weighted.
Said dosing apparatuses and processes are called "weight sum" since every component of the material to be mixed is weighted once it has reached the other components on the scale, thereby being summed to their weight. Thus, for adding a correct quantity of a component to the mixture, this quantity is dosed by estimating the opening time of the closure means of the outlet, namely the fall time necessary to the component for coming out of the hopper and reaching the scale where it is weighted. The measurement is therefore approximated and strongly dependent on the granulometry and the weight of the material, which are parameters which influence the fall time. This kind of dosing apparatuses has therefore the disadvantage of not allowing the preparation of precise mixtures.
It is therefore an object of the present invention to provide a dosing apparatus which is free from said disadvantages. Said object is achieved with a dosing apparatus and process, whose main features are disclosed in claims 1 and 17, respectively, while other features are disclosed in the remaining claims.
Thanks to the particular structure of the dosing apparatus in which each hopper containing a component of the mixture to be made up is constantly weighted by means of a load cell, the weight loss of each single hopper is measured while the component contained therein is discharged in a mixing collector and thus a measured weighing, correct and not hypothetic, is always assured.
Thus, the mixture obtained by means of the dosing apparatus and process according to the present invention does not require any further correction, which should for example made with subsequent additions of one or more components, which a consequent remarkable waste of time.
Another advantage of the apparatus and the process according to the present invention is that, since the components to be mixed are weighted by directly measuring the weight of the single hoppers, a scale or the like which measures the weight of the mixture before and after the addition of every single component to the mixture is not necessary anymore. The mixture can then be collected in a mixing collector remarkably less expensive than a scale. In addition, in the dosing apparatuses of the known art said scale must have a remarkable size if several components have to be weighted.
Furthermore, by using the apparatus and the process according to the present invention, the dosing can occur in much faster times with respect to the known art since the quantities of the materials to be mixed can be measured and mixed simultaneously, contrary to what may happen in the sequential dosing carried out by the apparatus of the known art. It should be noticed that said sequential weight-sum dosing apparatuses of the known art are even slower when the number of material to be mixed increases, since an additional pause is necessary for taking the load cell of the scale back to stationary conditions by damping the vibrations caused by the opening and the closing of the scale.
According to an aspect of the invention, the mixing of the flows of the different components is improved by dosing simultaneously the components to be mixed and by discharging them directly into the mixing collector.
According to another aspect of the invention, the material contained in the hoppers is discharged in batches into the mixing collector and the maximum level of each batch of material is changed by a control unit for controlling the discharge frequency of the batches from the hoppers to the mixing collector.
The precision of the load cells can be advantageously differentiated according to the quantity of material discharged from the relevant hoppers, so as to accurately dose also the material discharged in small percentages, since the measurement is not influenced by the material discharged in large percentages.
Further advantages and features of the dosing apparatus and process according to the present invention will become clear to those skilled in the art from the following detailed and non-limiting description of an embodiment thereof with reference to the attached drawings, wherein: - figure 1 shows an axonometric view of the dosing apparatus; and figure 2 shows a sectioned view of the apparatus of figure 1. Referring to said figures, it is seen that the dosing apparatus according to the present invention comprises in a known way a plurality of hoppers 1, 2, 3, 4, 5, 6. Each hopper 1, 2, 3, 4, 5, 6 is suitable for containing a material to be mixed with other materials which can be contained in the remaining hoppers and is provided with an outlet 7, 8, 9, 10, 11 on bottom 12, 13, 14, 15, 16 of hopper 1, 2, 3, 4, 5, 6 (the outlet of hopper 6 is not visible in the figures). The dosing apparatus also comprises a mixing collector 17 arranged below hoppers 1, 2, 3, 4, 5, 6, which is suitable for receiving the materials which are discharged by gravity from outlets 7, 8, 9, 10, 11 of hoppers 1, 2, 3, 4, 5, 6. The dosing apparatus further comprises in a known way at least one load cell for measuring the material to be mixed.
According to the invention, the dosing apparatus is provided with at least one load cell 18, 19, 20, 21, 22 which is mechanically connected, in particular is arranged under each hopper 1, 2, 3, 4, 5, 6, so that the weight of the latter is loaded on said load cell 18, 19, 20, 21, 22. The weight of each hopper 1, 2, 3, 4, 5, 6 can thus be measured constantly and individually and the weight loss of each single hopper can then be measured while .the component contained therein is discharged into mixing collector 17, which is in turn mechanically connected to a further load cell (not shown in the figures) for measuring the weight, namely the quantity, of the materials contained therein. In particular, at least one hopper 1, 2, 3, 4, 5, 6 of the dosing apparatus according to the invention has a converging bottom 12, 13, 14, 15, 16, whose outlet 7, 8, 9, 10, 11 directly rests on load cell 18, 19, 20, 21, 22. In an alternative embodiment the load cells are arranged above the hoppers, so as to measure their weight by traction.
Outlet 7, 8, 9, 10, 11 of at least one hopper 1, 2, 3, 4, 5, 6 is connected to a duct
23, 24, 25, 26 having an outlet end 28, 29 which is arranged above mixing collector 17. Said outlet end 28, 29 is provided with closure means 31, 32, 33, 34, in particular shutters which are mounted in a slidable manner on substantially vertical guides and are driven by pneumatic pistons 35, 36, 37, 38.
A first hopper 1 is preferably arranged over mixing collector 17, while the remaining hoppers 2, 3, 4, 5, 6 are arranged around said first hopper 1. Mixing collector 17 can.be supported by a cylindrical frame 39 to which first hopper 1, arranged over mixing collector 17, is fixed. Hoppers 2, 3, 4, 5, 6 arranged around said first hopper 1 are supported by ducts 23, 24, 25, 26 whose outlet end 28, 29 is arranged over mixing collector 17 and which are fixed to frame 39.
For allowing an operator to look the content of hoppers 1, 2, 3, 4, 5, 6, the latter can be provided with a transparent portion 40, 41 , 42, 43 on their outer surface.
In the process according to the present invention, load cells 18, 19, 20, 21, 22 continuously send to an electronic control unit (not shown in the figures) signals corresponding to the weights of the materials contained in hoppers 1, 2, 3, 4, 5, 6, so as to measure the quantity of material discharged by the latter. The control unit is also connected to the load cell of mixing collector 17 so as to open or close outlets 7, 8, 9, 10, 11 according to the signals sent by this load cell, namely according to the weight of the material contained in mixing collector 17. For this purpose, pneumatic pistons 35, 36, 37, 38 are connected to the control unit.
The signals sent by the load cell of mixing collector 17 allow to measure the quantity of material contained in the latter, so that the electronic control unit can be connected to a device arranged downstream for controlling the apparatus according to the .working of such, device. In particular, the material contained in hoppers 1, 2,-3, -4, 5,
6 is discharged in batches into mixing collector 17. The maximum level of each batch of material in mixing collector 17 can be changed by the control unit for controlling the opening/closing frequency of outlets 7, 8, 9, 10, 11, namely the discharge frequency of the material from hoppers 1, 2, 3, 4, 5, 6 to mixing collector 17 for obtaining a batch of material. For this purpose, the control unit calculates a threshold value of the weight measured by the load cell of mixing collector 17, exceeding which it closes outlets 7, 8, 9, 10, 11. Such a threshold value is calculated for keeping the frequency of the batches above a minimum value, so as to obtain a precise and timely control of the discharge of the material supplied by the apparatus to the device arranged downstream. As a matter of fact, if said frequency was too low, it would be difficult or even impossible to quickly and accurately adapt the discharge of the material supplied by the apparatus according to the present invention to the device arranged downstream according to the working of the latter. Possible modifications and/or additions may be made by those skilled in the art to the hereinabove disclosed and illustrated embodiment while remaining within the scope of the following claims.

Claims

1. Dosing apparatus comprising at least one load cell (18, 19, 20, 21, 22) and a plurality of hoppers (1, 2, 3, 4, 5, 6), each hopper (1, 2, 3, 4, 5, 6) being suitable for containing a material to be mixed with other materials which can be contained in the remaining hoppers (1, 2, 3, 4, 5, 6) and being provided with an outlet (7, 8, 9, 10, 11), a mixing collector (17) being arranged below the hoppers (1, 2, 3, 4, 5, 6) for receiving the materials which are discharged by gravity from the outlets (7, 8, 9, 10, 11) of the hoppers (1, 2, 3, 4, 5, 6), characterized in that the hoppers (1, 2, 3, 4, 5, 6) are mechanically connected to load cells (18, 19, 20, 21, 22) for measuring individually the weights of the materials contained in each hopper (1, 2, 3, 4, 5, 6).
2. Dosing apparatus according to the previous claim, characterized in that at least one hopper (1, 2, 3, 4, 5, 6) directly rests on its load cell (18, 19, 20, 21, 22).
3. Dosing apparatus according to one of the previous claims, characterized in that the mixing collector (17) is mechanically connected to a further load cell for measuring the weight of the materials contained therein.
4. Dosing apparatus according to one of the previous claims, characterized in that the load cells (18, 19, 20, 21, 22) are connected to a control unit for sending signals corresponding to the weights of the materials contained in the hoppers (1, 2, 3, 4, 5, 6).
5. Dosing apparatus according to the previous claim, characterized in that the control unit is also connected to the load cell of the mixing collector (17) for opening or closing the outlets (7, 8, 9, 10, 11) according to the signals sent by this load cell. 6. Dosing apparatus according to one of the previous claims, characterized in that the outlet (7, 8, 9, 10, 11) of at least one hopper (1, 2, 3, 4, 5,
6) is connected to a duct (23, 24, 25,.26) having an outlet end (28, 29) which is arranged above the mixing collector (17).
7. Dosing apparatus according to one of the previous claims, characterized in that the outlet (7, 8, 9, 10, 11) of the hoppers (1, 2, 3, 4, 5, 6) is provided with closure means (31, 32, 33, 34).
8. Dosing apparatus according to the previous claim, characterized in that the closure means (31, 32, 33, 34) are shutters housed in a sHdably manner on guides.
9. Dosing apparatus according to the previous claim, characterized in that said guides are substantially vertical.
10. Dosing apparatus according to one of claims 7 to 9, characterized in that the closure means (31, 32, 33, 34) are driven by pneumatic pistons (35, 36, 37, 38).
11. Dosing apparatus according to the previous claim, characterized in that the pneumatic pistons (35, 36, 37, 38) are connected to said control unit.
12. . Dosing apparatus according to one of the previous claims, characterized in that a first hopper (1) is arranged over the mixing collector (17), while the remaining hoppers (2, 3, 4, 5, 6) are arranged around said first hopper (1).
13. Dosing apparatus according to the previous claim, characterized in that the mixing collector (17) is supported by a frame (39), to which the first hopper (1) arranged over the mixing collector (17) is fixed.
14. Dosing apparatus according to the previous claim, characterized in that the hoppers (1, 2, 3, 4, 5, 6) arranged around said first hopper (1) are supported by the ducts (23, 24, 25, 26), whose outlet ends (28, 29) are arranged over the mixing collector (17).
15. Dosing apparatus according to the previous claim, characterized in that said ducts (23, 24, 25, 26) are fixed to said frame (39).
16. Dosing apparatus according to one of the previous claims, characterized in that at least one hopper (1, 2, 3, 4, 5, 6) comprises a transparent portion (40, 41, 42, 43) on its outer surface.
17. Dosing process of materials contained in a plurality of hoppers (1, 2, 3, 4, 5, 6) suitable for discharging material by gravity into a mixing collector (17) through outlets (7, 8, 9, 10, 11), characterized in that the weights of the materials contained in each hopper (1, 2, 3, 4, 5, 6) are measured individually by means of a plurality of load cells (18, 19, 20, 21, 22) mechanically connected to the hoppers (1, 2, 3, 4, 5, 6).
18. Process according to the previous claim, characterized in that the weight of the materials contained in the mixing collector (17) is measured by a further load cell.
19. Process according to the previous claim, characterized in that the outlets (J, 8, 9, 10, 11) are opened or closed according to the signals sent by the load cell of the mixing collector (17).
20. Process according to the previous claim, characterized in that the material contained in the hoppers (1, 2, 3, 4, 5, 6) is discharged in batches into the mixing collector (17).
21. Process according to the previous claim, characterized in that the maximum level of each batch of material in the mixing collector (17) is changed for controlling the opening/closing frequency of the outlets (7, 8, 9, 10, 11).
PCT/IB2008/001209 2007-06-04 2008-05-15 Dosing apparatus and process for mixing materials contained in a plurality of hoppers WO2008149190A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001137A ITMI20071137A1 (en) 2007-06-04 2007-06-04 EQUIPMENT AND DOSAGE PROCEDURE
ITMI2007A001137 2007-06-04

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WO2008149190A1 true WO2008149190A1 (en) 2008-12-11

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WO2014151321A1 (en) * 2013-03-15 2014-09-25 Project Healthy Children, Inc. Devices and methods for food fortification
CN106334473A (en) * 2016-09-23 2017-01-18 重庆欣润农业开发有限公司 Ingredient mixer for producing dried bean curd
EP3094463A4 (en) * 2014-01-16 2017-07-26 O.E.D.A. Liad Holdings (2006) Ltd. Weighing and mixing system
EP3221038A4 (en) * 2014-11-20 2018-07-18 O.E.D.A. Liad Holdings (2006) Ltd. Multi-channel gravimetric batch blender
CN110342019A (en) * 2018-04-08 2019-10-18 上海大和衡器有限公司 A kind of mixed material attaching system and its mixed material charging process
DE102018121966A1 (en) * 2018-09-10 2020-03-12 INOEX GmbH Innovationen und Ausrüstungen für die Extrusionstechnik Gravimetric dosing device for bulk goods and method for operating such a dosing device
IT201900018698A1 (en) * 2019-10-14 2021-04-14 Syncro S R L Continuous dispenser for granular plastics and the like equipped with a cleaning system
CN113799429A (en) * 2020-06-16 2021-12-17 菲特压片机械有限公司 Method for tracking products and device for processing powdered products into finished products
EP3926308A1 (en) * 2020-06-17 2021-12-22 Fette Compacting GmbH Method for operating a mixing device of a system
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DE102022108837A1 (en) 2022-04-12 2023-10-12 OAS Aktiengesellschaft Silo module system
CN116924090A (en) * 2023-07-04 2023-10-24 沈阳溢源生物科技有限公司 Automatic quantitative material control device for disinfectant production

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CN103506023A (en) * 2012-06-29 2014-01-15 无忌兴业股份有限公司 Material homogenizing device
WO2014151321A1 (en) * 2013-03-15 2014-09-25 Project Healthy Children, Inc. Devices and methods for food fortification
US10814295B2 (en) 2014-01-16 2020-10-27 Ampacet Corporation Weighing and mixing system
EP3875237A1 (en) * 2014-01-16 2021-09-08 Ampacet Corporation Weighing and mixing system for preparation of a mixture of granular components, and related method
EP3094463A4 (en) * 2014-01-16 2017-07-26 O.E.D.A. Liad Holdings (2006) Ltd. Weighing and mixing system
EP3221038A4 (en) * 2014-11-20 2018-07-18 O.E.D.A. Liad Holdings (2006) Ltd. Multi-channel gravimetric batch blender
US10293317B2 (en) 2014-11-20 2019-05-21 O.E.D.A. Liad Holdings (2006) Ltd. Multi-channel gravimetric batch blender
CN106334473A (en) * 2016-09-23 2017-01-18 重庆欣润农业开发有限公司 Ingredient mixer for producing dried bean curd
CN110342019A (en) * 2018-04-08 2019-10-18 上海大和衡器有限公司 A kind of mixed material attaching system and its mixed material charging process
DE102018121966A1 (en) * 2018-09-10 2020-03-12 INOEX GmbH Innovationen und Ausrüstungen für die Extrusionstechnik Gravimetric dosing device for bulk goods and method for operating such a dosing device
IT201900018698A1 (en) * 2019-10-14 2021-04-14 Syncro S R L Continuous dispenser for granular plastics and the like equipped with a cleaning system
US11931462B2 (en) 2020-06-16 2024-03-19 Fette Compacting Gmbh Method for product tracking in an installation
CN113799429A (en) * 2020-06-16 2021-12-17 菲特压片机械有限公司 Method for tracking products and device for processing powdered products into finished products
EP3928971A1 (en) * 2020-06-16 2021-12-29 Fette Compacting GmbH Method for tracking products in a system
EP3926308A1 (en) * 2020-06-17 2021-12-22 Fette Compacting GmbH Method for operating a mixing device of a system
DE102022108837A1 (en) 2022-04-12 2023-10-12 OAS Aktiengesellschaft Silo module system
CN116078336B (en) * 2023-04-11 2023-06-13 汕头市生慧食品有限公司 Preparation method and application of fresh-keeping quick-freezing liquid based on reverse opposite-stroke opposite-impact reinforced turbulence
CN116078336A (en) * 2023-04-11 2023-05-09 汕头市生慧食品有限公司 Preparation method and application of fresh-keeping quick-freezing liquid based on reverse opposite-stroke opposite-impact reinforced turbulence
CN116924090A (en) * 2023-07-04 2023-10-24 沈阳溢源生物科技有限公司 Automatic quantitative material control device for disinfectant production

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