EP0112643A2 - Siebmaschine - Google Patents

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Publication number
EP0112643A2
EP0112643A2 EP83307086A EP83307086A EP0112643A2 EP 0112643 A2 EP0112643 A2 EP 0112643A2 EP 83307086 A EP83307086 A EP 83307086A EP 83307086 A EP83307086 A EP 83307086A EP 0112643 A2 EP0112643 A2 EP 0112643A2
Authority
EP
European Patent Office
Prior art keywords
sieve
stacks
sifting machine
weights
plan
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Withdrawn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
EP83307086A
Other languages
English (en)
French (fr)
Other versions
EP0112643A3 (de
Inventor
Richard Fullalove
Bryan Colville Mcgee
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.)
Simon Corrugating Machinery Ltd
Original Assignee
Henry Simon Ltd
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 Henry Simon Ltd filed Critical Henry Simon Ltd
Publication of EP0112643A2 publication Critical patent/EP0112643A2/de
Publication of EP0112643A3 publication Critical patent/EP0112643A3/de
Withdrawn legal-status Critical Current

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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

Definitions

  • Machines of this kind usually comprise one or more stacks of superimposed sifting elements enclosed within a casing which forms a sieve box, and the box is supported for a sifting motion in a generally horizontal plane, usually by reeds or other flexible members attached to the ceiling so that the sieve box is freely suspended therefrom.
  • a motor attached to the suspended sieve box and coupled to a system of weights which are driven in rotation by the motor to set up the necessary gyratory or oscillatory motion required for sifting.
  • the arrangement of the free-swinging system requires that the weights providing the motion for the machine, shall be evenly distributed about the centre of gravity of the swinging mass, and so it is usual for the sieve box to be made up of a plurality of stacks of sifting members arranged in a group with a central open area in which the weights and usually a drive motor are housed so that the weights rotate closely about the vertical centre line, or centre of gravity, of the box.
  • the sieve box it is usual to provide a pair of frame members one on each side of the weights and motor system to support the Whole drive assembly.
  • the free-swinging system should enable the weight system to be adjusted easily thus to vary the motion as required.
  • this adjustment usually requires that a major part of the sieve box be stripped down to gain access to the central region thereof.
  • One system which overcomes this problem has two sets of rotating weights mounted on axes which are outside the bounds of the sieve box, i.e. an outboard system of weights, but this arrangement presents a further disadvantage by virtue of the increased floor area occupied by-the machine as a whole, and particularly since the rotating weight systems mounted outside the sieve box, must be housed within a casing or framework for safety in operation.
  • An object of the present invention is to provide a sifting machine wherein access to the weight system for ready adjustment thereof, is ensured, whilst the overall area occupied by the machine is minimised without a reduction of the sieving area.
  • a sifting machine comprising a freely suspended sieve box, rectilinear in plan, and comprising a plurality of sieve stacks attached together side by side, and two sets of throwing weights mounted for rotation on a pair of axes such that in plan a straight line between said axes passes through the centre of gravity of the sieve box, characterised in that the orbits of said throwing weight sets are disposed adjacent but substantially within the periphery of said rectilinear plan, whereby to maximise the area occupied by the sieve stacks whilst minimising the overall plan area of the sieve box.
  • Fig. 1 illustrates a conventional arrangement of eight sieve stacks 10 arranged in two parallel rows of four, supported and held in spaced relationship by frame members 11 and 12. Further frame members 13 support a motor and throwing weight system illustrated schematically and generally by the reference numeral 14.
  • the whole arrangement is suspended for free swinging movement on four pairs of suspension canes 15 in the conventional manner.
  • the rotating weights at 14 impart to the whole assembly a gyratory motion about the axis of rotation of the weights.
  • the sieve box arrangement illustrated in Fig. 2 overcomes the problem of access to the throwing weight system by placing it outside of the bounds of the sieve stacks so that the two rows thereof can be combined and supported by a less substantial framework, for example as illustrated at 16.
  • the weight system is divided into two halves mounted respectively at the two ends of the sieve box as illustrated at 17 and 18.
  • a single motor (not shown) is mounted centrally beneath the sieve box, and a pair of toothed belts (not shown) transmit the drive outwardly to the axis of rotation of the weights 17 and 18.
  • the gyratory motion provided by the drive system according to Fig. 1 can again be achieved.
  • the weights can be allowed to rotate out of phase so that a linear oscillatory motion is achieved.
  • the drive system may be arranged to impart to the sieve box, a gyratory or oscillatory motion as required.
  • the sets of weights 22 and 23 be disposed at opposite corners of the sieve box. Alternatively they may be disposed in any symmetrical positions about the centre of gravity of the box, the remainder of the plan area of the box being occupied by complete sieve stacks.
  • the sieve box has been illustrated as comprising eight separate sieve stacks, the invention can be applied to any number of stacks, where the stacks, preferably though not exclusively, are arranged in two or more rows.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
EP83307086A 1982-12-09 1983-11-21 Siebmaschine Withdrawn EP0112643A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8235163 1982-12-09
GB8235163 1982-12-09

Publications (2)

Publication Number Publication Date
EP0112643A2 true EP0112643A2 (de) 1984-07-04
EP0112643A3 EP0112643A3 (de) 1985-12-18

Family

ID=10534859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83307086A Withdrawn EP0112643A3 (de) 1982-12-09 1983-11-21 Siebmaschine

Country Status (2)

Country Link
EP (1) EP0112643A3 (de)
JP (1) JPS59136171A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1396289A1 (de) * 2002-09-04 2004-03-10 OCRIM S.p.A. Plansichter zur Trennung von gemahlenen Getreideteilchen
US20140299519A1 (en) * 2011-05-03 2014-10-09 Bühler AG Method and Device for Fractionating Bulk Material
US9358583B1 (en) 2014-12-30 2016-06-07 Richard B. Kahn Portable powered sifter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH321001A (de) * 1951-07-23 1957-04-15 Miag Vertriebsgesellschaft Mbh Plansichter
GB987673A (en) * 1961-04-11 1965-03-31 Simon Ltd Henry Improvements relating to plansifters
CH547129A (de) * 1972-01-20 1974-03-29 Buehler Ag Geb Plansichter.
US3981403A (en) * 1974-10-02 1976-09-21 Smico Corporation Oscillating free swinging sifter apparatus
GB2071808B (en) * 1980-03-12 1983-03-16 Simon Ltd Henry Sifting machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1396289A1 (de) * 2002-09-04 2004-03-10 OCRIM S.p.A. Plansichter zur Trennung von gemahlenen Getreideteilchen
US20140299519A1 (en) * 2011-05-03 2014-10-09 Bühler AG Method and Device for Fractionating Bulk Material
US9108222B2 (en) * 2011-05-03 2015-08-18 Bühler AG Method and device for fractionating bulk material
US9358583B1 (en) 2014-12-30 2016-06-07 Richard B. Kahn Portable powered sifter

Also Published As

Publication number Publication date
JPS59136171A (ja) 1984-08-04
EP0112643A3 (de) 1985-12-18

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

PUAL Search report despatched

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19860603

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FULLALOVE, RICHARD

Inventor name: MCGEE, BRYAN COLVILLE