WO2006084655A1 - Apparatus for screening a product - Google Patents

Apparatus for screening a product Download PDF

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Publication number
WO2006084655A1
WO2006084655A1 PCT/EP2006/001043 EP2006001043W WO2006084655A1 WO 2006084655 A1 WO2006084655 A1 WO 2006084655A1 EP 2006001043 W EP2006001043 W EP 2006001043W WO 2006084655 A1 WO2006084655 A1 WO 2006084655A1
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WO
WIPO (PCT)
Prior art keywords
screening net
net means
screening
product
casing
Prior art date
Application number
PCT/EP2006/001043
Other languages
French (fr)
Inventor
Giorgio Brighenti
Original Assignee
Cuccolini S.R.L.
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 Cuccolini S.R.L. filed Critical Cuccolini S.R.L.
Publication of WO2006084655A1 publication Critical patent/WO2006084655A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • B07B1/38—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens oscillating in a circular arc in their own plane; Plansifters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2230/00—Specific aspects relating to the whole B07B subclass
    • B07B2230/01—Wet separation

Definitions

  • the invention relates to an apparatus for screening a product .
  • Screening apparatuses comprising a first coarse, or rough, sifting screen downstream of which a collecting container is housed in a frame structure, a second sifting screen arranged downstream of the collecting container and housed in a further frame structure, and a conveying conduit that connects the collecting container to the second sifting screen.
  • the first sifting screen is supplied with a product to be screened and separates the product into a first fraction of product , comprising coarser particles, that is expelled from the apparatus through a first outlet conduit, and a second fraction of product, comprising finer particles , that is conveyed by gravity to the collecting container through a second outlet conduit .
  • such screening apparatuses can be installed downstream of a grinding mill of a system for preparing a ceramic mix.
  • the aforementioned mill provides a mixture formed of ceramic particles in a water suspension that , after being sifted and atomised, generates a loose ceramic material that is suitable for being pressed to obtain ceramic products .
  • With the conveying conduit there is associated a pump that conveys to the second sifting screen the second fraction of product , which is sifted further until a semifinished product is obtained comprising particles having a desired granulometry.
  • a drawback of the aforementioned screening apparatuses is that, in order for the fraction of product contained in the collecting container to be able to be conveyed to the second sifting screen, it is necessary to provide a dedicated pump, which involves additional system costs .
  • Another drawback of the screening apparatuses disclosed above is that they require expensive frame structures formed so as to support the collecting containers .
  • Further screening apparatuses comprising a further first coarse, or rough, sifting screen, supported by a frame, downstream of which there is arranged a further second sifting screen and a further conveying conduit that connects the further first coarse sifting screen to the further second sifting screen.
  • the further first sifting screen is supplied with a product to be screened, for example coming from a mill , and separates the product into a further first fraction of product comprising coarser particles , that is expelled from the apparatus through a further first outlet conduit , and a further second fraction of product, comprising finer particles , that is evacuated through a further second outlet conduit and conveyed by gravity through the further conveying conduit to the further second sifting screen.
  • the latter sifts the further second fraction of product to obtain a semifinished product comprising particles having a desired granulometry.
  • a drawback of such screening apparatuses is that they require a frame formed so as to support the further first sifting screen at an intermediate height between an outlet conduit of the mill and the further second sifting screen. As a result , the mill has to be positioned at a non- insignificant vertical height, with consequent complications in the installation phase .
  • Another drawback, common to both the types of screening apparatuses disclosed above, is that they have significant overall dimensions .
  • a further drawback of the screening apparatuses disclosed above is that they have great costs .
  • An obj ect of the invention is to improve known screening apparatuses .
  • Another obj ect is to obtain screening apparatuses that are compact .
  • a further obj ect is to obtain screening apparatuses of limited cost .
  • a screen is provided for screening a product , comprising screening net means provided with evacuation means suitable for evacuating from said screen a fraction of said product retained by said screening net means , characterised in that it furthermore comprises further screening net means arranged downstream of said screening net means for receiving a further fraction of said product that has traversed said screening net means .
  • the screening apparatus Owing to the invention, it is possible to obtain a screening apparatus that , with the same productive capacity, occupies spaces that are significantly reduced with respect to known screening apparatuses . Further, the screening apparatus according to the invention is cheaper and simpler to construct than prior-art apparatuses .
  • the screening net means retains a coarser fraction of the product to be screened, this fraction comprising particles having dimensions noticeably greater than the dimensions of the meshes of the further screening net means .
  • the presence of the screening net means prevents the aforementioned particles damaging the further screening net means .
  • it prevents these particles from occupying a significant surface of the further screening net means , obstructing the meshes thereof and thus limiting the efficiency thereof .
  • the screen is a vibrating screen provided with a vibrating motor .
  • the screening net means and. the further screening net means can be vibrated by the same vibrating motor, enabling further simplification to be obtained compared with the state of the art .
  • the invention can be better understood and implemented with reference to the attached drawings , which illustrate an embodiment thereof by way of non-limitative example, in which: Figure 1 is a schematic section, taken along a vertical plane of a screening apparatus ;
  • Figure 2 is a schematic plan view of the screening apparatus in Figure 1.
  • a screen 1 comprising a supply opening 17 , through which a product to be screened is introduced, coming, for example, from a grinding mill of ceramic mixes .
  • a first casing 2 Downstream of the supply opening 17 there is arranged a first casing 2 inside which a first sifter 3 is positioned constituted by a first screening net 4 having meshes of preset size .
  • first discharging conduit 6 arranged for evacuating from the first casing 2 a part of product that also comprises particles that, having dimensions greater than those of the meshes of the first screening net 4 , are not able to pass through the first sifter 3.
  • the first casing 2 furthermore comprises a baffle 7 that is impermeable to the product to be screened and is arranged downstream of the first sifter 3 to collect a fraction of finer product that , having smaller dimensions than the dimensions of the meshes of the first screening net 4 , has passed through the first sifter 3.
  • the baffle 7 directs the fraction of finer product to a first outlet 9.
  • the screen 1 furthermore comprises a second casing 10 , substantially similar to the first casing 2 , and comprising a second sifter 11 provided with a second screening net 12 , a second supply opening 13 and a second discharging conduit 14.
  • the first discharging conduit 6 is connected to the second supply opening 13 by means of a manifold 25.
  • the second casing 10 is provided with a lower portion 16 shaped as an upturned conical trunk that directs the fraction of finer product that has passed through the second screening net 12 to a second outlet 18.
  • the first screening net 4 and the second screening net 12 having substantially the same dimensions .
  • the screen 1 furthermore comprises a third casing 19 arranged between the supply opening 17 and the first casing 2 and comprising a third sifter 21.
  • the third sifter 21 comprises a third screening net 20 provided with meshes having greater dimensions than the dimensions of the meshes of the first screening net 4 and of- the second screening net 12.
  • the third screening net 20 is used to separate from the product to be screened a fraction of coarser product comprising particles of greater dimensions than the dimensions of the meshes of the third screening net 20 that are expelled through the third discharging conduit 26.
  • the third sifter 21 enables the screening action of the screen 1 to be improved inasmuch as it expels from the screen 1 the coarsest fraction of product . In this way it is avoided that the particles that form the coarsest fraction of product interact with the first screening net 4 and/or with the second screening net 12 , obstructing the meshes thereof and slowing down the screening operations .
  • providing a first sifter 2 and a second sifter 11 cooperating together enables screening efficiency to be increased and therefore enables a single screen 1 to be used at the mill outlet rather than a plurality of screens .
  • providing a third sifter 21 enables the efficiency of the screen 1 to be improved further inasmuch as the particles having a coarser granulometry are expelled from the screen 1 before interacting with the first sifter 2 and/or the second sifter 11.
  • the devices that perform a rough screening action and the devices that perform a finishing screening action are arranged near to one another, ' it is possible to obtain better supervision by an operator.
  • the first casing 2 , the second casing 10 and the third casing 19 have a plan section that may have a substantially circular shape, and are arranged so as to be superimposed, so as to minimise the surface occupied by the screen 1.
  • the lower portion 16 of the second casing 10 which in addition to the second casing 10 also supports the first casing 2 and the third casing 19 , is connected to a base 23 of the screen 1 through springs 24 that enable the lower portion 16 to oscillate in relation to the base 23.
  • a vibrating motor 22 with eccentric masses is associated that is driven by an electric motor that vibrates the first casing 2 , the second casing 10 and the third casing 19. Owing to the invention, it is possible to obtain a cheaper screening apparatus than those of the prior art , inasmuch as the same vibrating motor drives both the screening net that performs the rough screening and the screening nets that perform refining.
  • a product to be screened is introduced inside the third casing 19 through the first supply opening 17.
  • the product is screened by the third sifter 21 so that a fraction of the aforementioned product traverses the third screening net 20 , whereas the coarser part of the product is retained by the third screening net 20 and is expelled from the screen 1 through the third discharging conduit 26.
  • the fraction of product that has traversed the third screening net 20 flows inside the first casing 2. Part of this fraction of product is screened by the first sifter 3 , which enables a first fraction of finer product to be obtained that is conveyed by means of the baffle 7 to the first outlet 9.
  • Another part of the fraction of product that has traversed the third screening net 20 and has flowed inside the first casing 2 is transferred through the first discharging conduit 6 and the manifold 25 inside the second casing 10 , where it is screened by the second sifter 11.
  • the second sifter enables a second fraction of finer product that is evacuated through the second outlet 18 to be separated from a remaining fraction of screened product that is evacuated to the exterior of the screen 1 through the second discharging conduit 14.
  • the product to be screened comprises a fluid suspension of solid particles
  • the product to be screened comprises a fluid suspension of solid particles
  • the third screening net 20 having meshes that are noticeably greater than the meshes of the first screening net 4 and of the second screening net 12 , does not hinder the formation of a head that substantially affects the entire surface of the first screening net 4.
  • the fluid suspension can be introduced inside the screen 1 in a controlled manner so that the head of fluid suspension inside the second casing 10 is such as to affect only a central zone 27 of the second screening net 12 , so that in the latter an annular crown 28 is defined that is not affected by the passage of the fluid suspension.
  • the annular crown 28 defines a collecting zone of the particles of solid product having greater dimensions than those of the meshes of the second screening net 12. In this collecting zone, therefore, the aforementioned particles of solid product can be effectively separate from the fluid inside which they were immersed. This enables the discharge of the aforementioned solid particles from the second sifter 11 to be simplified compared with the case of particles of solid product that are still mixed with fluid.
  • the productivity of the screen ⁇ is thus significantly increased inasmuch as it is not necessary to limit the extent of the head inside all the casings that make it up, but only inside the casing located further downstream, at which the entire fraction of product is expelled from the screen 1 that comprises particles having greater dimensions than the dimensions of the meshes of the first screening net 4 and of the second screening net 12.
  • the screen 1 may, instead of three screening nets , as disclosed with reference to Figure 1 , comprise only two screening nets .
  • an upper sifter may be provided, inside which a coarse screening net is arranged, that supplies directly a lower sifter provided with a fine screening net .
  • the coarse screening net and the fine screening net can each be associated with a respective casing .
  • the coarse screening net and the fine screening net can be associated with the same casing .
  • the control screen comprises a sifter provided with a control screening net having meshes substantially the same as , or slightly greater than, meshes of the first screening net 4 and of the second' screening net 12. In this way, during operation of the apparatus , any accumulation of product on the control screening net indicates damage, for example a tear in the first screening net 4 and/or the second screening net 12.

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  • Combined Means For Separation Of Solids (AREA)

Abstract

A screen for screening a product comprises screening net means (20) provided with evacuation means (26) suitable for evacuating from said screen (1) a fraction of said product retained by said screening net means (20) and further screening net means (4, 12) arranged downstream of said screening net means (20) for receiving a further fraction of said product that has traversed said screening net means (20).

Description

Apparatus for screening a product
The invention relates to an apparatus for screening a product .
Screening apparatuses are known comprising a first coarse, or rough, sifting screen downstream of which a collecting container is housed in a frame structure, a second sifting screen arranged downstream of the collecting container and housed in a further frame structure, and a conveying conduit that connects the collecting container to the second sifting screen.
The first sifting screen is supplied with a product to be screened and separates the product into a first fraction of product , comprising coarser particles, that is expelled from the apparatus through a first outlet conduit, and a second fraction of product, comprising finer particles , that is conveyed by gravity to the collecting container through a second outlet conduit .
In particular, such screening apparatuses can be installed downstream of a grinding mill of a system for preparing a ceramic mix. The aforementioned mill provides a mixture formed of ceramic particles in a water suspension that , after being sifted and atomised, generates a loose ceramic material that is suitable for being pressed to obtain ceramic products . With the conveying conduit there is associated a pump that conveys to the second sifting screen the second fraction of product , which is sifted further until a semifinished product is obtained comprising particles having a desired granulometry. A drawback of the aforementioned screening apparatuses is that, in order for the fraction of product contained in the collecting container to be able to be conveyed to the second sifting screen, it is necessary to provide a dedicated pump, which involves additional system costs . Another drawback of the screening apparatuses disclosed above is that they require expensive frame structures formed so as to support the collecting containers .
Further screening apparatuses are known comprising a further first coarse, or rough, sifting screen, supported by a frame, downstream of which there is arranged a further second sifting screen and a further conveying conduit that connects the further first coarse sifting screen to the further second sifting screen. The further first sifting screen is supplied with a product to be screened, for example coming from a mill , and separates the product into a further first fraction of product comprising coarser particles , that is expelled from the apparatus through a further first outlet conduit , and a further second fraction of product, comprising finer particles , that is evacuated through a further second outlet conduit and conveyed by gravity through the further conveying conduit to the further second sifting screen. The latter sifts the further second fraction of product to obtain a semifinished product comprising particles having a desired granulometry.
A drawback of such screening apparatuses is that they require a frame formed so as to support the further first sifting screen at an intermediate height between an outlet conduit of the mill and the further second sifting screen. As a result , the mill has to be positioned at a non- insignificant vertical height, with consequent complications in the installation phase . Another drawback, common to both the types of screening apparatuses disclosed above, is that they have significant overall dimensions .
A further drawback of the screening apparatuses disclosed above is that they have great costs . An obj ect of the invention is to improve known screening apparatuses . Another obj ect is to obtain screening apparatuses that are compact .
A further obj ect is to obtain screening apparatuses of limited cost . According to the invention, a screen is provided for screening a product , comprising screening net means provided with evacuation means suitable for evacuating from said screen a fraction of said product retained by said screening net means , characterised in that it furthermore comprises further screening net means arranged downstream of said screening net means for receiving a further fraction of said product that has traversed said screening net means .
Owing to the invention, it is possible to obtain a screening apparatus that , with the same productive capacity, occupies spaces that are significantly reduced with respect to known screening apparatuses . Further, the screening apparatus according to the invention is cheaper and simpler to construct than prior-art apparatuses .
In particular, it is possible to associate a single screen rather than a plurality of screens with a dispensing device for dispensing a material to be screened, for example a grinding mill of ceramic mixes .
The screening net means retains a coarser fraction of the product to be screened, this fraction comprising particles having dimensions noticeably greater than the dimensions of the meshes of the further screening net means .
In this way, the presence of the screening net means prevents the aforementioned particles damaging the further screening net means . In addition, it prevents these particles from occupying a significant surface of the further screening net means , obstructing the meshes thereof and thus limiting the efficiency thereof .
In an embodiment , the screen is a vibrating screen provided with a vibrating motor . In this case, the screening net means and. the further screening net means can be vibrated by the same vibrating motor, enabling further simplification to be obtained compared with the state of the art . The invention can be better understood and implemented with reference to the attached drawings , which illustrate an embodiment thereof by way of non-limitative example, in which: Figure 1 is a schematic section, taken along a vertical plane of a screening apparatus ;
Figure 2 is a schematic plan view of the screening apparatus in Figure 1.
With reference to Figures 1 and 2 , there is shown a screen 1 comprising a supply opening 17 , through which a product to be screened is introduced, coming, for example, from a grinding mill of ceramic mixes .
Downstream of the supply opening 17 there is arranged a first casing 2 inside which a first sifter 3 is positioned constituted by a first screening net 4 having meshes of preset size .
With the first casing 2 there is associated a first discharging conduit 6 arranged for evacuating from the first casing 2 a part of product that also comprises particles that, having dimensions greater than those of the meshes of the first screening net 4 , are not able to pass through the first sifter 3.
The first casing 2 furthermore comprises a baffle 7 that is impermeable to the product to be screened and is arranged downstream of the first sifter 3 to collect a fraction of finer product that , having smaller dimensions than the dimensions of the meshes of the first screening net 4 , has passed through the first sifter 3.
The baffle 7 directs the fraction of finer product to a first outlet 9. The screen 1 furthermore comprises a second casing 10 , substantially similar to the first casing 2 , and comprising a second sifter 11 provided with a second screening net 12 , a second supply opening 13 and a second discharging conduit 14.
The first discharging conduit 6 is connected to the second supply opening 13 by means of a manifold 25.
The second casing 10 is provided with a lower portion 16 shaped as an upturned conical trunk that directs the fraction of finer product that has passed through the second screening net 12 to a second outlet 18. The first screening net 4 and the second screening net 12 having substantially the same dimensions .
The screen 1 furthermore comprises a third casing 19 arranged between the supply opening 17 and the first casing 2 and comprising a third sifter 21. The third sifter 21 comprises a third screening net 20 provided with meshes having greater dimensions than the dimensions of the meshes of the first screening net 4 and of- the second screening net 12. With the third casing 19 there is associated a third discharging conduit 26. The third screening net 20 is used to separate from the product to be screened a fraction of coarser product comprising particles of greater dimensions than the dimensions of the meshes of the third screening net 20 that are expelled through the third discharging conduit 26.
The third sifter 21 enables the screening action of the screen 1 to be improved inasmuch as it expels from the screen 1 the coarsest fraction of product . In this way it is avoided that the particles that form the coarsest fraction of product interact with the first screening net 4 and/or with the second screening net 12 , obstructing the meshes thereof and slowing down the screening operations . In particular, providing a first sifter 2 and a second sifter 11 cooperating together enables screening efficiency to be increased and therefore enables a single screen 1 to be used at the mill outlet rather than a plurality of screens .
Furthermore, providing a third sifter 21 enables the efficiency of the screen 1 to be improved further inasmuch as the particles having a coarser granulometry are expelled from the screen 1 before interacting with the first sifter 2 and/or the second sifter 11.
This is particularly advantageous inasmuch, in the absence of the third sifter 21 , these particles would interact first with the first screening net 4 and subsequently, after being conveyed through the manifold 25 , also with the second screening net 12.
In this case, the above coarser particles could impair the screening efficiency of both the first sifter 3 and of the second sifter 11.
Furthermore, as unlike what occurred in the prior-art apparatuses , the devices that perform a rough screening action and the devices that perform a finishing screening action are arranged near to one another, ' it is possible to obtain better supervision by an operator.
The first casing 2 , the second casing 10 and the third casing 19 have a plan section that may have a substantially circular shape, and are arranged so as to be superimposed, so as to minimise the surface occupied by the screen 1. The lower portion 16 of the second casing 10 , which in addition to the second casing 10 also supports the first casing 2 and the third casing 19 , is connected to a base 23 of the screen 1 through springs 24 that enable the lower portion 16 to oscillate in relation to the base 23. With the lower portion 16 a vibrating motor 22 with eccentric masses is associated that is driven by an electric motor that vibrates the first casing 2 , the second casing 10 and the third casing 19. Owing to the invention, it is possible to obtain a cheaper screening apparatus than those of the prior art , inasmuch as the same vibrating motor drives both the screening net that performs the rough screening and the screening nets that perform refining.
During operation, a product to be screened is introduced inside the third casing 19 through the first supply opening 17.
The product is screened by the third sifter 21 so that a fraction of the aforementioned product traverses the third screening net 20 , whereas the coarser part of the product is retained by the third screening net 20 and is expelled from the screen 1 through the third discharging conduit 26.
The fraction of product that has traversed the third screening net 20 flows inside the first casing 2. Part of this fraction of product is screened by the first sifter 3 , which enables a first fraction of finer product to be obtained that is conveyed by means of the baffle 7 to the first outlet 9.
Another part of the fraction of product that has traversed the third screening net 20 and has flowed inside the first casing 2 is transferred through the first discharging conduit 6 and the manifold 25 inside the second casing 10 , where it is screened by the second sifter 11. The second sifter enables a second fraction of finer product that is evacuated through the second outlet 18 to be separated from a remaining fraction of screened product that is evacuated to the exterior of the screen 1 through the second discharging conduit 14.
If the product to be screened comprises a fluid suspension of solid particles , it is possible to supply the first casing 2 and the second casing 10 in such a way as to obtain in the first casing 2 a head of fluid suspension of the desired height , this head being sufficiently high to enable the entire surface of the first screening net 4 to be wet by the fluid suspension. The third screening net 20 , having meshes that are noticeably greater than the meshes of the first screening net 4 and of the second screening net 12 , does not hinder the formation of a head that substantially affects the entire surface of the first screening net 4.
The fluid suspension can be introduced inside the screen 1 in a controlled manner so that the head of fluid suspension inside the second casing 10 is such as to affect only a central zone 27 of the second screening net 12 , so that in the latter an annular crown 28 is defined that is not affected by the passage of the fluid suspension. The annular crown 28 defines a collecting zone of the particles of solid product having greater dimensions than those of the meshes of the second screening net 12. In this collecting zone, therefore, the aforementioned particles of solid product can be effectively separate from the fluid inside which they were immersed. This enables the discharge of the aforementioned solid particles from the second sifter 11 to be simplified compared with the case of particles of solid product that are still mixed with fluid. The productivity of the screen ϊ is thus significantly increased inasmuch as it is not necessary to limit the extent of the head inside all the casings that make it up, but only inside the casing located further downstream, at which the entire fraction of product is expelled from the screen 1 that comprises particles having greater dimensions than the dimensions of the meshes of the first screening net 4 and of the second screening net 12.
Furthermore, providing a head of liquid that completely wets the sifters housed in the casings located further upstream enables screening speed to be increased owing to a greater quantity of product , the proper weight of which presses on the sifters .
Alternatively, the screen 1 may, instead of three screening nets , as disclosed with reference to Figure 1 , comprise only two screening nets . In particular, an upper sifter may be provided, inside which a coarse screening net is arranged, that supplies directly a lower sifter provided with a fine screening net .
The coarse screening net and the fine screening net can each be associated with a respective casing . Alternatively, the coarse screening net and the fine screening net can be associated with the same casing . In an embodiment that is not shown, it is possible to provide a control screen arranged downstream of the screen 1 to be supplied with a semifinished product coming from the first outlet 9 and from the second outlet 18. The control screen comprises a sifter provided with a control screening net having meshes substantially the same as , or slightly greater than, meshes of the first screening net 4 and of the second' screening net 12. In this way, during operation of the apparatus , any accumulation of product on the control screening net indicates damage, for example a tear in the first screening net 4 and/or the second screening net 12.

Claims

1. Screen for screening a product , comprising screening net means (20 ) provided with, evacuation means (26) suitable for evacuating from said screen ( 1) a fraction of said product retained by said screening net means (20) , characterised in that it furthermore comprises further screening net means (4 , 12 ) arranged downstream of said screening net means (20) for receiving a further fraction of said product that has traversed said screening net means (20) .
2. Screen according to claim 1 , wherein said screening net means (20) and said further screening net means (4 , 12 ) are associated with casing means ( 19 ; 2 , 10) of said screen (1) , said casing means ( 19 ; 2 , 10) defining a chamber arranged for receiving said product .
3. Screen according to claim 2 , wherein said casing means comprises first casing means (19) , to which said screening net means (20) is fixed, and further casing means (2 , 10) , to which said further screening net means (4 , 12 ) is fixed.
4. Screen according to claim 2 , wherein said casing means comprises a casing to which said screening net means (20) and said further screening net means (4 , 12) are fixed.
5. Screen according to any preceding claim, and furthermore comprising a vibrating motor structured so as to vibrate said screening net means (20) and said further screening net means (4 , 12 ) .
6. Screen according to any preceding claim, wherein said further screening net means comprises first screening net means (4) and second screening net means (12) , between which there is interposed barrier means (7) arranged to prevent a part of said product that has traversed said first screening net means (4) from reaching said second screening net means (12) .
7. Screen according to claim 6 , and furthermore comprising conduit means (6 , 13 , 25) arranged so as to convey a further part of said product that has been retained by said first screening net means (4) to said second screening net means (12) .
8. Screen according to any preceding claim, wherein said screening net means (20) is provided with meshes having dimensions greater than the dimensions of further meshes with which said further screening net means (4 , 12) is provided.
9. Screen according to any one of claims 6 to 8 , wherein said first screening net means (4) and said second screening net means (12) have meshes of dimensions that are substantially equal to one another .
10. Screen according to any preceding claim, wherein said screening net means (20) and said further screening net means (4 , 12) have a substantially circular plan section.
11. Use of a screen according to any one of claims 1 to 10 for screening particles of ceramic material dispersed in a liquid.
12. Use according to claim 11 , wherein said ceramic material comprises a ceramic mix in a water suspension
13. Use according to claim 11 , wherein said ceramic material comprises a glaze in a water suspension.
PCT/EP2006/001043 2005-02-08 2006-02-07 Apparatus for screening a product WO2006084655A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO2005A000028 2005-02-08
IT000028A ITMO20050028A1 (en) 2005-02-08 2005-02-08 APPARATUS FOR SCRAPING OF A PRODUCT.

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DE102010005288A1 (en) 2009-01-21 2010-08-19 Ident Technology Ag System for detecting the touch of a display
CN103252318A (en) * 2013-04-18 2013-08-21 辽宁科技大学 Wet-type grading analysis vibrating sieve set and application thereof
JP2015226912A (en) * 2015-08-31 2015-12-17 三菱レイヨン株式会社 Vibrating sieving machine
CN107051869A (en) * 2017-05-05 2017-08-18 王永笑 A kind of high efficiency filter sieve of oil drilling
CN109675796A (en) * 2019-03-07 2019-04-26 长沙理工大学 A kind of Vibratory Mixing type collection screening separator
CN111039024A (en) * 2019-11-14 2020-04-21 绍兴日月新材料有限公司 Raw material recovery device in production of polyester film
WO2020204711A1 (en) * 2019-04-01 2020-10-08 Pharmafilter B.V. Separator and method of separating

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CN103252318A (en) * 2013-04-18 2013-08-21 辽宁科技大学 Wet-type grading analysis vibrating sieve set and application thereof
JP2015226912A (en) * 2015-08-31 2015-12-17 三菱レイヨン株式会社 Vibrating sieving machine
CN107051869A (en) * 2017-05-05 2017-08-18 王永笑 A kind of high efficiency filter sieve of oil drilling
CN109675796A (en) * 2019-03-07 2019-04-26 长沙理工大学 A kind of Vibratory Mixing type collection screening separator
WO2020204711A1 (en) * 2019-04-01 2020-10-08 Pharmafilter B.V. Separator and method of separating
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US11958076B2 (en) 2019-04-01 2024-04-16 Stichting Ip & Know How Pharmafilter Separator and method of separating
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