EP1920851A1 - Screening apparatus - Google Patents

Screening apparatus Download PDF

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Publication number
EP1920851A1
EP1920851A1 EP07118018A EP07118018A EP1920851A1 EP 1920851 A1 EP1920851 A1 EP 1920851A1 EP 07118018 A EP07118018 A EP 07118018A EP 07118018 A EP07118018 A EP 07118018A EP 1920851 A1 EP1920851 A1 EP 1920851A1
Authority
EP
European Patent Office
Prior art keywords
casing
seat means
collecting chamber
screening
receiving
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07118018A
Other languages
German (de)
English (en)
French (fr)
Inventor
Giorgio Brighenti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cuccolini Srl
Original Assignee
Cuccolini Srl
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 Srl filed Critical Cuccolini Srl
Publication of EP1920851A1 publication Critical patent/EP1920851A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • 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
    • B07B1/06—Cone or disc shaped screens
    • 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

Definitions

  • the invention relates to a screening apparatus and a method for making a part of said apparatus arranged for receiving a screened material.
  • the invention relates to a screening apparatus that is usually used in productive systems of various types, for example systems for manufacturing ceramic products, for screening materials that were produced by apparatuses or that have to supply apparatuses installed in the aforesaid systems.
  • Screening apparatuses are known with a casing provided with a supply opening through which a material to be screened is supplied to a screening net and with a discharge opening through which a screened material exits.
  • the screening net is supported and stressed by a supporting ring and is interposed between a first part of the casing arranged for receiving the material to be screened and a second part of the casing defining a collecting chamber arranged for receiving the screened material.
  • the second part comprises a conical side wall on which a plurality of brackets are welded and a bottom wall in which a circular opening is obtained.
  • the second part further comprises a cover, or cap, projecting internally into the collecting chamber and welded to an internal surface of the bottom wall facing the collecting chamber.
  • the cap is arranged for closing the circular opening and for defining a seat arranged for receiving an eccentric mass fixed to an end of a drive shaft of an eccentric mass motovibrator.
  • the eccentric mass is positioned in the aforesaid seat and projects from the circular opening inside the collecting chamber.
  • the motovibrator is driven by an electric motor, the frame of which is provided with a flange fixed by a threaded connection to an external surface of the bottom wall opposite the aforesaid internal surface.
  • Known screening apparatuses further comprise a plurality of springs.
  • the springs connect the second part of the casing to a base of the aforesaid screening apparatuses and enable the casing to vibrate with respect to the base.
  • these springs are fixed on one side to the aforesaid brackets, and on an opposite side to the base.
  • the eccentric mass motovibrator driven by the electric motor, vibrates the casing to enable a finer fraction of the material to be screened to pass through the screening net and be subsequently expelled through the discharge opening to a collecting container.
  • the second part is made from a disc-shaped plate.
  • a portion of the plate is pressed by an abutting element against an abutting surface, having a substantially conical shape, of a die fixed to a spindle.
  • the abutting element faces the die and is free to rotate around a rotation axis thereof.
  • the plate is interposed between the abutting element and the die.
  • the spindle is rotated, and a suitable tool presses a remaining portion of the sheet against the abutting surface of the die.
  • the cap is made, by forming or by spinning, which is then fixed to the internal surface of the bottom wall.
  • a drawback of the aforesaid screening apparatuses is that they are very expensive to make.
  • a further drawback are the operations that are necessary for obtaining and assembling these apparatuses, which operations are extremely slow and laborious.
  • An object of the invention is to improve screening apparatuses and the methods for making a part of said apparatuses arranged for receiving a screened material.
  • a further object is to provide screening apparatuses that are cheap and fast to make.
  • a still further object is to obtain screening apparatuses that are stronger than known screening apparatuses.
  • a screening apparatus comprising a casing provided with a part defining a collecting chamber for receiving a screened material, said part comprising seat means projecting into said collecting chamber and arranged for receiving an end part of motovibrator means arranged for vibrating said casing with respect to a base of said apparatus, characterised in that said seat means is formed by a recess obtained in said part.
  • said part comprises a flat annular portion to which first springs ends can be fixed that are arranged for connecting said part to a base of said apparatus.
  • a method for making a part of a casing of a screening apparatus, said part defining a collecting chamber for receiving a screened material and being provided with seat means for receiving an end part of motovibrator means arranged for making said casing vibrate with respect to a base of said apparatus, said method comprising deforming plate means in such a way that said seat means projects inside said collecting chamber.
  • said part and said seat means are formed by a single body.
  • this enables the costs of making a cap to be eliminated, inasmuch as the latter is replaced by said seat means, and on the other hand this enables the costs of purchasing brackets to be fixed to said part to be eliminated, inasmuch as said brackets are replaced by said annular portion, to which said springs can be fixed.
  • a screening apparatus 1 is shown that is usually used in production systems of various types, which are not shown, for example systems for manufacturing ceramic products, for screening materials that were manufactured by apparatuses, or which have to supply apparatuses installed inside the aforesaid systems.
  • the screening apparatus 1 comprises a casing 2 provided with a supply opening 4 through which a material to be screened is conveyed to a screening net 3, and with a discharge opening, which is not shown, through which a screened material exits.
  • the screening net 3 is supported and stressed by a supporting ring 5 and abuts on an angular abutting ring 6 that is operationally positioned above the supporting ring 5 and is welded to the casing 2.
  • a seal can be interposed, which is not shown, that is arranged for safeguarding the screening net 3.
  • the screening net 3 is interposed between a first part 7 of the casing 2 arranged for receiving the material to be screened and a second part 8 of the casing 2 defining a collecting chamber 9 arranged for receiving the screened material.
  • the second part 8 comprises side wall means 10, arranged for conveying the screened material to the discharge opening ( Figure 2 ).
  • the side wall means 10 comprises a first tilted side wall 11, a second tilted side wall 12, a third tilted side wall 13 and a fourth tilted side wall 14 having increasing diameters.
  • the fourth side wall 14 acts as a rest for fixing means 50 which are arranged for fixing the first part 7 to the second part 8.
  • the side wall means 10 further comprises a substantially flat annular wall 15 interposed between the first tilted side wall 11 and the second tilted side wall 12 and provided with a plurality of holes 16.
  • the second part 8 further comprises a bottom wall 18 in which a recess 60 is obtained which is internally positioned in a substantially coaxial manner with respect to the annular wall 15 of the side wall means 10, between the recess 60 and the side wall means 10 a substantially flat connecting wall 19 being provided.
  • the recess 60 has a substantially conical shape and projects inside the collecting chamber 9.
  • the recess 60 has any concave shape with the concavity facing downwards.
  • the recess 60 defines seat means 17 arranged for receiving an eccentric mass 20 fixed to an end of a motor shaft 21 of an eccentric mass motovibrator 22.
  • the eccentric mass 20 is positioned in the seat means 17, inside the collecting chamber 9.
  • the motovibrator 22 is driven by an electric motor 23, which is inserted into a frame 24 provided with a flange 25 fixed by a threaded connection to the connecting wall 19.
  • the screening apparatus 1 further comprises a plurality of springs, which is not shown, arranged for connecting the second part 8 to a base, which is not shown, of the screening apparatus 1 and for enabling the casing 2 to vibrate with respect to the aforesaid base.
  • the springs are fixed, by a threaded connection, to the annular wall 15 on the one side and to the base on the opposite side.
  • the motovibrator 22 driven by the electric motor 23, vibrates the casing 2 to enable a finer fraction of the material to be screened to pass through the screening net 3 and to be subsequently expelled through the discharge opening to a collecting container, which is not shown.
  • a spinning lathe 26 is shown in a first operating configuration A in which the spinning lathe 26 is arranged for forming the seat means 17.
  • the spinning lathe 26 comprises a spindle 27 on which there is fixed a first die 28 defining a first abutting surface 29.
  • the first abutting surface 29 comprises a flat surface 32 and, substantially at a central portion 31 thereof, a protrusion 30 having a substantially conical shape.
  • the protrusion 30 is shaped in such a way as to reproduce a profile 39 of the recess 60 ( Figure 2 ).
  • the spinning lathe 26 further comprises an abutting element 33, having a substantially conical shape and facing the first die 28.
  • the abutting element 33 is free to rotate around a first rotation axis X and is movable towards and away from the first die 28.
  • the spinning lathe 26 further comprises a forming roller 34 that is free to rotate around a second rotation axis Y thereof, the forming roller 34 being movable towards and away from the first die 28.
  • the spinning lathe 26 is shown in a second operating configuration B in which the spinning lathe 26 is arranged for forming the side wall means 10.
  • the second operating configuration B differs from the first operating configuration A inasmuch as on the spindle 27 a second die 37 is fixed defining a second abutting surface 38.
  • the second abutting surface 38 is shaped in such a way as to reproduce a further profile 41 of the second part 8 ( Figure 1 ).
  • the second die surface 38 comprises, substantially at a second central portion 51 thereof, an indentation 40 that reproduces the profile 39 of the recess 60.
  • a disc-shape plate 35 which is represented by the broken line in Figure 3 , is positioned on the spinning lathe 26.
  • the plate 35 is interposed between the first die 28 and the abutting element 33 and is pressed by the latter against the protrusion 30 of the first abutting surface 29.
  • the spindle 27 is rotated and the forming roller 34 is advanced.
  • the forming roller 34 contacts the plate 35 and presses the plate 35 against the first abutting surface 29, deforming the plate 35.
  • the seat means 17 is formed in the plate 35.
  • the partially formed plate 35 is removed from the spinning lathe 26
  • the first die 28 is removed from the spindle 27 and the second die 37 is mounted.
  • the partially formed plate 35 is positioned again on the spinning lathe 26.
  • the plate 35 is interposed between the second die 37 and the abutting element 33 and is pressed by the latter against the indentation 40 of the second abutting surface 38.
  • the plate 35 is positioned in such a way that the previously formed seat means 17 abuts on the indentation 40.
  • the spindle 27 is rotated and the forming roller 34 is advanced.
  • the forming roller 34 contacts the plate 35 and presses the latter against the second abutting surface 29, deforming the plate 35.
  • the side wall means 10 is formed in the plate 35.
  • the screening apparatus 1 requires little expenditure of money to be made.
  • the second part 8 and the aforesaid seat means 17 are formed by a single body obtained through spinning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
EP07118018A 2006-11-13 2007-10-08 Screening apparatus Withdrawn EP1920851A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMO20060368 ITMO20060368A1 (it) 2006-11-13 2006-11-13 Apparato di vagliatura

Publications (1)

Publication Number Publication Date
EP1920851A1 true EP1920851A1 (en) 2008-05-14

Family

ID=39110792

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07118018A Withdrawn EP1920851A1 (en) 2006-11-13 2007-10-08 Screening apparatus

Country Status (2)

Country Link
EP (1) EP1920851A1 (it)
IT (1) ITMO20060368A1 (it)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB349481A (en) 1930-01-18 1931-05-18 Underfeed Stoker Co Ltd Improvements in screening apparatus
US2777578A (en) 1949-09-10 1957-01-15 Farmers And Merchants Nat Bank Screening mechanism
US3220546A (en) 1962-05-28 1965-11-30 Champion Papers Inc Vibrating treatment for fiber recovery from waste effluents
FR1463635A (fr) 1965-01-21 1966-12-23 Southwestern Eng Co Structure de tamis auto-nettoyeur perfectionnée pour séparateurs fonctionnant par vibrations
DE2143123A1 (de) 1970-08-29 1972-04-06 Boulton Ltd William Vibrationsgerat
US6006569A (en) 1998-04-27 1999-12-28 Shrayer; Emmanuil Method for manufacturing a dome from an undersized blank
US20040226333A1 (en) 2003-05-14 2004-11-18 Hiroshi Kato Method of manufacturing elliptic deep-drawn products
WO2005049229A2 (en) 2003-11-21 2005-06-02 Cuccolini S.R.L. Apparatuses and methods for screening a product
WO2005065048A2 (en) 2004-01-07 2005-07-21 Wheels India Limited Wheels of unitary construction and method of making same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB349481A (en) 1930-01-18 1931-05-18 Underfeed Stoker Co Ltd Improvements in screening apparatus
US2777578A (en) 1949-09-10 1957-01-15 Farmers And Merchants Nat Bank Screening mechanism
US3220546A (en) 1962-05-28 1965-11-30 Champion Papers Inc Vibrating treatment for fiber recovery from waste effluents
FR1463635A (fr) 1965-01-21 1966-12-23 Southwestern Eng Co Structure de tamis auto-nettoyeur perfectionnée pour séparateurs fonctionnant par vibrations
DE2143123A1 (de) 1970-08-29 1972-04-06 Boulton Ltd William Vibrationsgerat
US6006569A (en) 1998-04-27 1999-12-28 Shrayer; Emmanuil Method for manufacturing a dome from an undersized blank
US20040226333A1 (en) 2003-05-14 2004-11-18 Hiroshi Kato Method of manufacturing elliptic deep-drawn products
WO2005049229A2 (en) 2003-11-21 2005-06-02 Cuccolini S.R.L. Apparatuses and methods for screening a product
WO2005065048A2 (en) 2004-01-07 2005-07-21 Wheels India Limited Wheels of unitary construction and method of making same

Also Published As

Publication number Publication date
ITMO20060368A1 (it) 2008-05-14

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