EP0405477B1 - Siebmaschine - Google Patents

Siebmaschine Download PDF

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Publication number
EP0405477B1
EP0405477B1 EP90112189A EP90112189A EP0405477B1 EP 0405477 B1 EP0405477 B1 EP 0405477B1 EP 90112189 A EP90112189 A EP 90112189A EP 90112189 A EP90112189 A EP 90112189A EP 0405477 B1 EP0405477 B1 EP 0405477B1
Authority
EP
European Patent Office
Prior art keywords
sieve
frame
frames
wich
sieve frame
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.)
Expired - Lifetime
Application number
EP90112189A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0405477A1 (de
Inventor
Johannes Dipl.-Ing. Brüderlein
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT90112189T priority Critical patent/ATE88379T1/de
Publication of EP0405477A1 publication Critical patent/EP0405477A1/de
Application granted granted Critical
Publication of EP0405477B1 publication Critical patent/EP0405477B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48—Stretching devices for screens
    • B07B1/485—Devices for alternately stretching and sagging screening surfaces

Definitions

  • the invention relates to a sieving machine with two sieve frames to be set in vibration, which are arranged one above the other, on which an elastic sieve covering divided into several sieve fields is arranged and which are to be set in vibration by at least one oscillating drive.
  • a screening machine which has two screen frames arranged at different heights, an upper frame being mounted on a lower frame by means of an elastic bearing.
  • the upper sieve frame is therefore floating on the lower sieve frame.
  • An elastic mounting in the form of a U-shaped profile made of plastic is provided between the upper sieve frame and the lower sieve frame and also serves as a seal. This means that the upper frame is removed from the lower frame by the height of the elastic mounting.
  • cross members are arranged, which extend to approximately the middle area of the upper sieve frame.
  • crossbeams which protrude from the lower sieve frame so far upwards and protrude into the upper sieve frame that they are flush with the crossbeams of the upper sieve frame.
  • the upper areas of the cross members form a common plane approximately in the middle area of the upper sieve frame.
  • the screen covering is arranged in this level and fastened to the cross members.
  • An eccentric bearing with a crankshaft is provided on the lower sieve frame.
  • Two crank rods mounted on the crankshaft engage the upper sieve frame.
  • the lower sieve frame and the upper sieve frame are set in precisely opposite vibrations at the same time, since the driving force acting on the upper sieve frame via the crank rod has the same, but 180 ° out of phase on the lower sieve frame acting reaction force.
  • This screening machine is a two-mass system in which the mass forces are always out of phase by an angle of 180 ° and are in equilibrium.
  • the driving force on the upper frame and the reaction force on the lower frame always have the same frequency.
  • the two sieve frames both swing against each other and only in the longitudinal direction.
  • Another known screening machine consists of two vibrating screen frames, each of which has a plurality of cross members to which an elastic screen pad is attached. Relative to the middle position of the screen frame to each other, the screen covering is longer than the length of the frame, so that the screen covering between loosely sags the individual cross beams.
  • the entire screen surface therefore forms a plurality of screen tracks one behind the other, which run transverse to the longitudinal direction of the screening machine, each screen track being located between two adjacent cross members.
  • Both frames of the screening machine are set in vibration by mutually independent unbalance drives in such a way that the two frames swing 180 ° out of phase with each other so that they are in mass balance.
  • the frames both swing in their longitudinal direction, i.e. one-dimensionally in the same direction and in a common plane.
  • the screening machine known from German Offenlegungsschrift 22 30 812 has only a single screen frame.
  • This sieve frame is mounted on a swing arm at the end of the feed. Further towards the discharge end beyond the center of the sieve frame, it is supported on two pendulum supports and driven in a circular motion. This means that the screen has a circular movement in the area of the drive and a vertical movement at the feed end and at the discharge end executes.
  • This known screening machine does not have a screen covering divided into several screen fields.
  • This screening machine is therefore foreign to the genus, since it does not meet several features of the preamble of the new claim 1, especially not the features according to which two screen frames are provided, according to which the screen frames are arranged one above the other at different heights and according to which a screen covering divided into several screen fields is attached to the screen frame is arranged.
  • the invention has for its object to provide a screening machine of the type mentioned in the the sealing problems in the area of the edge of the screen covering no longer exist and in which particularly good screening results can be achieved in the fine and ultra-fine area of the screen items and in particular in the case of difficult to screen items by shear forces in the level of the screen covering.
  • the invention consists in that the two sieve frames with longitudinal walls are assigned to one another in such a way that the lower end of the upper sieve frame and the upper end of the lower sieve frame lie in a common plane, that the elastic sieve covering is in the common plane the two sieve frames are attached to them and that the upper sieve frame is driven in a circular manner on the feed side in a horizontal plane and the lower sieve frame on the discharge side in a vertical plane.
  • the upper sieve frame and the lower sieve frame are arranged at different heights such that the lower region of the upper sieve frame and the upper region of the lower sieve frame lie in one plane
  • the lower region of the upper sieve frame and the upper region of the lower sieve frame can be used as a clamping region can be used for the screen covering.
  • the upper screen frame can be set in circular movements on the feed side in a horizontal plane and at the same time the lower screen frame can be set in circular movements on the discharge side in a vertical plane.
  • the upper frame and the lower frame swing in mutually perpendicular planes, namely the upper frame in a horizontal plane and the lower frame in a vertical plane.
  • the invention is that the two sieve frames with longitudinal walls are assigned to each other such that the lower end of the upper sieve frame and the upper end of the lower sieve frame lie in a common plane, that the elastic sieve covering in the common plane the two sieve frames are attached to them and that the upper sieve frame is driven in a circular manner on the feed side in a vertical plane and the lower sieve frame on the discharge side in a horizontal plane.
  • the swinging movements of the two swing frames are reversed to the first solution of the task described above, namely such that the lower swing frame swings in a horizontal plane, while the upper swing frame swings in a vertical plane.
  • the invention is that the two sieve frames with longitudinal walls are assigned to each other such that the lower end of the upper sieve frame and the upper end of the lower sieve frame lie in a common plane, that the elastic sieve covering in the common plane the two sieve frames are attached to them and that the upper sieve frame is driven in a circular manner in the same horizontal plane on the feed side and the lower sieve frame on the discharge side.
  • the vibratory drive can be designed as an unbalance drive or as an eccentric drive.
  • Both screen frames are expediently set in vibration at such different frequencies that no beats occur. This means that the difference between the frequency of one frame and the frequency of the other frame must be sufficiently large.
  • the two sieve frames are expediently driven in such a way that the upper sieve frame with an oscillation number in the range of 500, 750, 1000 or 1500 oscillations per minute and the lower sieve frame accordingly with an oscillation number in the range of 750, 1000, 1500 or 3000 oscillations per minute is driven or vice versa.
  • the lower sieve frame and the upper sieve frame are each mounted on the drive side on a spring, for example a screw or rubber spring, and on the end on a link, for example a link spring.
  • a spring for example a screw or rubber spring
  • a link for example a link spring
  • a machine frame 1 is resiliently supported on springs 2, 4, 5 on a foundation 6.
  • the machine frame 1 consists of two cheeks 7, 8 delimiting the machine frame 1, which are connected to one another by cross members 9, 10, 11, 12 and are held at a distance.
  • a lower sieve frame 13 is provided on the machine frame 1, which essentially consists of two side walls 14, 15, which are connected to one another at their task ends 16, 17 via an end wall 18. At the feed ends 16, 17 of the side walls 14, 15, link springs 19, 20 are provided with which the lower sieve frame 13 is resiliently mounted on the machine frame 1. At the discharge ends 21, 22 of the lower sieve frame 13, the latter is resiliently mounted on coil springs 23, 24.
  • an unbalance drive 25 is fastened, through which the lower sieve frame 13 is moved in such a way that it carries out circular movements in a vertical plane at its discharge-side end 21, 22.
  • the circular movements carried out by the lower sieve frames 13 are rotated in FIG. 5 by 90 ° in relation to the representation in FIG. 3, that is to say represented in a vertical plane.
  • the lower sieve frame 13 performs a circular movement according to the circle 26 and at the end on the feed side a translatory movement in the direction of the double arrow 27.
  • the lower sieve frame 13 executes approximately elliptical movements according to the elliptical curves 28, 29, 30.
  • An upper sieve frame 31 is provided on the machine frame 1 and consists of two frames 32, 33 arranged side by side.
  • the frame 32 is delimited by the longitudinal beams 34, 35 and the frame 33 by the longitudinal beams 35, 36.
  • the latter is spring-mounted on coil springs 38, 39 on blocks 40, 41.
  • the jacks 40, 41 are supported on the machine frame 1.
  • An oscillating drive 46 is arranged on the end wall 45 at the end 37 of the upper sieve frame 31 on the feed side, by means of which the upper sieve frame 31 on the end 37 of the feed end is set in circular movements.
  • the upper sieve frame 31 executes the circular movement 47 shown in FIG. 4 at the end 37 on the feed side, while the discharge end 42 of the upper sieve frame 31 moves in the direction of the double arrow 48 moved one dimension.
  • the movements of the upper screen frame 31 in the areas between the feed end 37 and the discharge end 42 correspond to the ellipse-like curves 49, 50, 51 according to FIG. 4.
  • the upper sieve frame 31 and the lower sieve frame 13 are arranged at a height such that the lower region 52 of the upper sieve frame 31 and the upper region 53 of the lower sieve frame 13 lie in a common plane.
  • an elastic screen covering 54 is fastened to the upper screen frame 31 and the lower screen frame 13. This results in four screen tracks 55, 56, 57, 58 between the longitudinal walls 14, 15 of the lower screen frame 13 and the longitudinal walls 34, 35, 36 of the upper screen frame 31.
  • FIGS. 6, 7 and 8 show the state of the four screen tracks 55, 56, 57, 58 at the input end 37 of the upper screen frame 31 and at the input side end 16, 17 of the lower screen frame 13.
  • FIG. 7 shows the situation in the one reversal point of the sieve frame 13, 31.
  • the upper sieve frame 31 is deflected to the left relative to the lower sieve frame 13, so that the sieve tracks 55 and 57 are tensioned at this point of reversal, while the other sieve tracks 56, 58 sag more.
  • FIG. 8 shows the situation in the other reversal point of the sieve frames 13, 31, in which the upper sieve frame 31 is deflected to the right relative to the lower sieve frame 13, so that the sieve tracks 55, 57 which were previously tensioned sag during this reversal point, while the previously loose sieve tracks 56.58 are now tensioned.
  • the state of the wire webs 55, 56, 57, 58 changes from the state shown in FIG. 7 to the state illustrated in FIG. 8 and vice versa, the intermediate state shown in FIG. 6 being established between the two end states.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Holo Graphy (AREA)
  • Eye Examination Apparatus (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Fish Paste Products (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Sorting Of Articles (AREA)
EP90112189A 1989-06-29 1990-06-27 Siebmaschine Expired - Lifetime EP0405477B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90112189T ATE88379T1 (de) 1989-06-29 1990-06-27 Siebmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3921349A DE3921349A1 (de) 1989-06-29 1989-06-29 Siebmaschine
DE3921349 1989-06-29

Publications (2)

Publication Number Publication Date
EP0405477A1 EP0405477A1 (de) 1991-01-02
EP0405477B1 true EP0405477B1 (de) 1993-04-21

Family

ID=6383892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112189A Expired - Lifetime EP0405477B1 (de) 1989-06-29 1990-06-27 Siebmaschine

Country Status (6)

Country Link
US (1) US5037535A (enrdf_load_stackoverflow)
EP (1) EP0405477B1 (enrdf_load_stackoverflow)
AT (1) ATE88379T1 (enrdf_load_stackoverflow)
AU (1) AU629360B2 (enrdf_load_stackoverflow)
DE (2) DE3921349A1 (enrdf_load_stackoverflow)
ZA (1) ZA905034B (enrdf_load_stackoverflow)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0534040T3 (da) * 1991-09-27 1996-09-16 Mogensen Fredrik Ab Fremgangsmåde og apparat til sigtning af granulært materiale
ES2099653B1 (es) * 1991-12-13 1998-01-16 Jose Borrel S A C I F Maquina calibradora doble para frutos secos, legumbres, semillas y otros productos.
EP0576694A1 (de) * 1992-06-29 1994-01-05 Fritz Stichweh Gmbh Siebmaschine
US5301814A (en) * 1992-10-15 1994-04-12 Rotex, Inc. Increasing the relative motion of a screen deck
US5341939A (en) * 1993-02-22 1994-08-30 Corrosion Engineering, Inc. Multiple deck vibrating screen apparatus
US5730297A (en) * 1995-11-27 1998-03-24 Rotex, Inc. Screening machine with improved base force reduction
US6003679A (en) * 1997-05-07 1999-12-21 Maroscher; Victor William Sieving device with duel independent frequency input
US6029823A (en) * 1998-11-11 2000-02-29 Young; Grant A. Recessed vibrator for an elliptical motion screen separator
US6679386B2 (en) * 2001-05-31 2004-01-20 Sizetec, Inc. Low-density particle sizing apparatus and method
BR0309727A (pt) * 2002-05-03 2005-02-22 Gen Kinematics Corp Moinho de atrito, e, método para recuperar a areia de fundição a partir de material depositado
DE102007034512B3 (de) * 2007-07-24 2008-06-26 ThyssenKrupp Fördertechnik GmbH Unwuchtantrieb für Siebmaschinen
DE102016011816A1 (de) * 2016-10-05 2018-04-05 Hein, Lehmann Gmbh Spannwellensiebmaschine mit optimierter Transportleistung
EP3714996A1 (de) * 2019-03-29 2020-09-30 Binder + Co AG Siebvorrichtung
CN113176173B (zh) * 2021-04-26 2022-10-04 中国矿业大学(北京) 筛分实验装置及实验系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7145669U (de) * 1973-06-28 Krupp F Gmbh Siebmaschine

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1204920B (de) * 1963-01-05 1965-11-11 Albert Wehner Sieb- oder Foerdermaschine
DE1206372B (de) * 1964-09-26 1965-12-09 Albert Wehner Siebrost
AT324249B (de) * 1970-08-07 1975-08-25 Rheinische Werkzeug & Maschf Siebmaschine
DE2230812A1 (de) * 1972-06-23 1974-01-17 Allgaier Werke Gmbh Verfahren und vorrichtung zum sieben unter verwendung mindestens einer geneigten in kontinuierlichem uebergang unterschiedliche bewegungen ausfuehrenden siebflaeche
US4188288A (en) * 1972-11-30 1980-02-12 Hein, Lehmann Ag Screen with tubular frame systems coupled for rectilinear motion
US3971715A (en) * 1973-02-27 1976-07-27 Albert Wehner Device for sieving, sorting, filtering and the like
DE2424007A1 (de) * 1974-05-17 1975-11-27 Siteg Siebtech Gmbh Siebmaschine
DE2923474C2 (de) * 1979-06-09 1983-09-15 Rhewum Rheinische Werkzeug- Und Maschinenfabrik Gmbh, 5630 Remscheid Siebmaschine
SU865426A1 (ru) * 1980-01-25 1981-09-23 Чувашский Сельскохозяйственный Институт Министерства Сельского Хозяйства Ссср Решетный стан
US4287056A (en) * 1980-06-16 1981-09-01 Kinergy Corporation Sifter stroke screen
DE3139279A1 (de) * 1981-10-02 1983-04-21 Klöckner-Humboldt-Deutz AG, 5000 Köln Schwingmaschine zum sieben und/oder foerdern, insbesondere einmassen-freischwinger-maschine
SU1025462A1 (ru) * 1982-02-18 1983-06-30 Ивановский Ордена "Знак Почета" Энергетический Институт Им. В.И.Ленина Вибрационный грохот
DE3344035A1 (de) * 1983-12-06 1985-06-13 Cyrus GmbH Schwingtechnik, 4350 Recklinghausen Schwingsieb zur wahlweisen foerderung des siebguts in einander entgegengesetzten foerderrichtungen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7145669U (de) * 1973-06-28 Krupp F Gmbh Siebmaschine

Also Published As

Publication number Publication date
ATE88379T1 (de) 1993-05-15
AU629360B2 (en) 1992-10-01
ZA905034B (en) 1991-04-24
US5037535A (en) 1991-08-06
EP0405477A1 (de) 1991-01-02
DE3921349A1 (de) 1991-01-03
DE3921349C2 (enrdf_load_stackoverflow) 1991-07-11
AU5760590A (en) 1991-01-03
DE59001235D1 (de) 1993-05-27

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