EP1981653B1 - Sieve - Google Patents

Sieve Download PDF

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Publication number
EP1981653B1
EP1981653B1 EP07700128A EP07700128A EP1981653B1 EP 1981653 B1 EP1981653 B1 EP 1981653B1 EP 07700128 A EP07700128 A EP 07700128A EP 07700128 A EP07700128 A EP 07700128A EP 1981653 B1 EP1981653 B1 EP 1981653B1
Authority
EP
European Patent Office
Prior art keywords
screen
drop
box
sieve
channels
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.)
Active
Application number
EP07700128A
Other languages
German (de)
French (fr)
Other versions
EP1981653A1 (en
Inventor
Jürgen Moosmann
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.)
Buehler AG
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Buehler AG
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Filing date
Publication date
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP1981653A1 publication Critical patent/EP1981653A1/en
Application granted granted Critical
Publication of EP1981653B1 publication Critical patent/EP1981653B1/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
    • 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

Definitions

  • the invention relates to a sieve, in particular a sieve for use in Plansichtern or the like screening and viewing devices for the screening of floury, granular or granular products.
  • Such screens have a sieve box with bottom plate and fines discharge as well as a sieve frame covered with sieve cloth.
  • the screen frame is, like the screen box with webs divided into fields, is fastener-free and form-fitting inserted into the sieve box.
  • Such insert screen frame has a sufficiently high inherent rigidity, so that it is not deformed and does not need to be fixed with fasteners on the screen box.
  • the screen frame is preferably made of metallic materials and covered with screen mesh.
  • the product-carrying surfaces of the sieve box are preferably coated with plastic, the bottom plate is made of metal or plastic.
  • the invention has for its object to develop a screen that allows a better performance adjustment to the product flow in the classifier, in particular Plansichter and is particularly suitable for very high performance.
  • the solution of the task The sieve box has at least one diarrhea channel whose width is much higher than usual (usually about 6 cm), preferably at least 1.5 flat as wide. For example, a width of about 13 cm.
  • two large outlet channels are preferably provided, which are arranged parallel to each other on the outer sides of the screen box.
  • Sieves with such large diarrhea channels for the overflow are particularly for Kontrollsichtungen at high powers, eg. B. of up to 40 t / h per Siebabteil applicable. At the same time they allow better air circulation in the plan sifter.
  • the outer dimensions (base area) of the screen are preferably identical in all embodiments.
  • the sieve boxes are preferably filled with foam and provided with insertion sieves whose frames are made of metal, preferably made of stainless steel, in accordance with the disclosure according to EP-B-584302 ,
  • the outlet box preferably has a modular construction, which, with a small number of molded parts, enables a high variety of outlet variants, also with regard to the number of product runs.
  • a foamed from PUR sieve box 1 a sieve has a bottom plate 2 and partitions 4 for receiving a Einlegesiebrahmens 5 with webs and continue discharge channels and is bounded by side walls 3.
  • the frame height of the screen box 1 is about 8 cm.
  • the screen box 1 also has specifically designed corner pieces 7, on the one hand enable a good centering within outer side walls 3 and on the other hand large outlet channels and diarrhea channels 6.
  • the width of these diarrhea channels 6 is about 13 cm, which allows a visual performance of about 35 t / h.
  • the foamed screen box 1 has no sharp corners and edges, which simplifies cleaning. The wear is low.
  • the insert screen frame 5 made of stainless steel is provided with a contour-matched seal, which ensures optimum tightness between insert screen frame 5 and screen box 1.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

A sieve is disclosed which can, for example, be used in plansifters or similar sieving and screening devices for screening mealy or granular products. To increase screening performance, there is provided at least one drop-through channel whose width is, for example, at least 1.5 times that of known sieves.

Description

Die-Erfindung betrifft ein Sieb, insbesondere ein Sieb zur Anwendung in Plansichtern oder dergleichen Sieb- und Sichteinrichtungen zur Sichtung von mehligen, granularen oder körnigen Produkten.The invention relates to a sieve, in particular a sieve for use in Plansichtern or the like screening and viewing devices for the screening of floury, granular or granular products.

In der EP-B-584302 sind Vorrichtungen für Plansichter, insbesondere auch Siebe und Siebrahmen offenbart. Solche Siebe weisen einen Siebkasten mit Bodenplatte und Feingutaustrag sowie einen mit Siebgewebe bespannten Siebrahmen auf. Der Siebrahmen ist, wie auch der Siebkasten mit Stegen in Felder unterteilt, ist verbindungselementefrei und formschlüssig in den Siebkasten einlegbar. Ein solcher Einlegesiebrahmen weist eine ausreichend hohe Eigensteifigkeit auf, so dass er nicht verformt wird und nicht mit Befestigungselementen auf dem Siebkasten fixiert werden muss. Der Siebrahmen wird bevorzugt aus metallischen Werkstoffen hergestellt und mit Siebgewebe bespannt. Die produktführenden Flächen des Siebkastens sind bevorzugt mit Kunststoff beschichtet, die Bodenplatte besteht aus Metall oder Kunststoff.In the EP-B-584302 are devices for plansifter, in particular sieves and sieve frame disclosed. Such screens have a sieve box with bottom plate and fines discharge as well as a sieve frame covered with sieve cloth. The screen frame is, like the screen box with webs divided into fields, is fastener-free and form-fitting inserted into the sieve box. Such insert screen frame has a sufficiently high inherent rigidity, so that it is not deformed and does not need to be fixed with fasteners on the screen box. The screen frame is preferably made of metallic materials and covered with screen mesh. The product-carrying surfaces of the sieve box are preferably coated with plastic, the bottom plate is made of metal or plastic.

Es ist auch bekannt, Siebrahmen aus Kunststoffen herstellen und zur Versteifung ein Metallskelett vorzusehen. Das Siebgewebe kann durch Umschäumen mit dem Siebrahmen verbunden werden.It is also known to produce sieve frames made of plastics and to provide a metal skeleton for stiffening. The screen mesh can be connected by foaming with the screen frame.

Ferner ist es nach der DE-A-10105647 bekannt, solche Siebkästen aus einem Kunststoff auszuschäumen. Hierbei kann für einen Steg noch ein Einleger in der Schäumform vorgesehen sein, der während des Ausschäumens schwimmend gelagert ist und beim abkühlen frei schrumpfen kann.Furthermore, it is after the DE-10105647-A known to foam such sieve boxes made of a plastic. This can be provided for a web nor a deposit in the foam mold, which is floatingly stored during foaming and can shrink freely during cooling.

Der Erfindung liegt die Aufgabe zugrunde, ein Sieb zu entwickeln, das eine bessere Leistungsanpassung an den Produktfluss im Sichter, insbesondere Plansichter ermöglicht und insbesondere für sehr hohe Leistungen geeignet ist. Die Lösung der Aufgabe erfolgt mit den Merkmalen des Patentanspruchs 1. Der Siebkasten weist mindestens einen Durchfallkanal auf, dessen Breite wesentlich höher als üblich (üblich sind ca. 6 cm) ist, bevorzugt mindestens 1,5flach so breit. Zum Beispiel eine Breite von ca. 13 cm.The invention has for its object to develop a screen that allows a better performance adjustment to the product flow in the classifier, in particular Plansichter and is particularly suitable for very high performance. The solution of the task The sieve box has at least one diarrhea channel whose width is much higher than usual (usually about 6 cm), preferably at least 1.5 flat as wide. For example, a width of about 13 cm.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen offenbart. So sind bevorzugt zwei grosse Auslaufkanäle vorgesehen, die parallel zueinander an den Aussenseiten des Siebkastens angeordnet sind. Siebe mit derart grossen Durchfallkanälen für den Überlauf sind besonders für Kontrollsichtungen bei hohen Leistungen, z. B. von bis zu 40 t/h je Siebabteil anwendbar. Sie ermöglichen zugleich eine bessere Luftzirkulation im Plansichter.Advantageous embodiments are disclosed in the subclaims. Thus, two large outlet channels are preferably provided, which are arranged parallel to each other on the outer sides of the screen box. Sieves with such large diarrhea channels for the overflow are particularly for Kontrollsichtungen at high powers, eg. B. of up to 40 t / h per Siebabteil applicable. At the same time they allow better air circulation in the plan sifter.

Die Aussenabmessungen (Grundfläche) des Siebes sind bei allen Ausführungsformen vorzugsweise gleich.The outer dimensions (base area) of the screen are preferably identical in all embodiments.

In weiterer Ausgestaltung sind die Siebkästen vorzugsweise ausgeschäumt und mit Einlegesieben versehen, deren Rahmen aus Metall bestehen, vorzugsweise aus rostfreiem Stahl, in Anlehnung an die Offenbarung gemäss EP-B-584302 .In a further embodiment, the sieve boxes are preferably filled with foam and provided with insertion sieves whose frames are made of metal, preferably made of stainless steel, in accordance with the disclosure according to EP-B-584302 ,

Der Auslaufkasten weist bevorzugt einen modularen Aufbau auf, was bei geringer Anzahl von Formteilen eine hohe Vielfalt an Auslaufvarianten ermöglicht, auch bzgl. der Anzahl der Produktläufe.The outlet box preferably has a modular construction, which, with a small number of molded parts, enables a high variety of outlet variants, also with regard to the number of product runs.

Die Erfindung wird nachfolgend in einem Ausführungsbeispiel anhand einer Zeichnung näher beschrieben. In der Zeichnung zeigen die

Fig. 1:
einen Siebkasten in Draufsicht,
Fig. 2:
die Unteransicht eines geschäumten Siebkastens.
The invention will be described below in an embodiment with reference to a drawing. In the drawing show the
Fig. 1:
a sieve box in plan view,
Fig. 2:
the bottom view of a foamed screen box.

Ein aus PUR geschäumter Siebkasten 1 eines Siebes weist eine Bodenplatte 2 sowie Zwischenwände 4 zur Aufnahme eines Einlegesiebrahmens 5 mit Stegen und weiterhin Auslaufkanäle auf und ist von Seitenwänden 3 begrenzt. Die Rahmenhöhe des Siebkastens 1 beträgt ca. 8 cm.A foamed from PUR sieve box 1 a sieve has a bottom plate 2 and partitions 4 for receiving a Einlegesiebrahmens 5 with webs and continue discharge channels and is bounded by side walls 3. The frame height of the screen box 1 is about 8 cm.

Der Siebkasten 1 weist zudem spezifisch ausgebildete Eckstücke 7 auf, die einerseits ein gutes zentrieren innerhalb äusserer Seitenwände 3 und andererseits grosse Auslaufkanäle und Durchfallkanäle 6 ermöglichen.The screen box 1 also has specifically designed corner pieces 7, on the one hand enable a good centering within outer side walls 3 and on the other hand large outlet channels and diarrhea channels 6.

Vorgesehen sind zwei breite Durchfallkanäle 6, die zwischen Siebrahmen 5 und Aussenwand des Siebkastens 1 angeordnet sind. Die Breite dieser Durchfallkanäle 6 beträgt ca. 13 cm, was eine Sichtleistung von ca. 35 t/h ermöglicht.Provided are two broad diarrhea channels 6, which are arranged between the sieve frame 5 and outer wall of the sieve box 1. The width of these diarrhea channels 6 is about 13 cm, which allows a visual performance of about 35 t / h.

Der geschäumte Siebkasten 1 weist keine scharfen Ecken und Kanten auf, was die Reinigung vereinfacht. Der Verschleiss ist gering.The foamed screen box 1 has no sharp corners and edges, which simplifies cleaning. The wear is low.

Der Einlegesiebrahmen 5 aus rostfreiem Stahl ist mit einer konturangepassten Dichtung versehen, was eine optimale Dichtheit zwischen Einlegesiebrahmen 5 und Siebkasten 1 gewährleistet.The insert screen frame 5 made of stainless steel is provided with a contour-matched seal, which ensures optimum tightness between insert screen frame 5 and screen box 1.

Claims (5)

  1. Screen, in particular for use in plansifters or similar screening and sifting devices for sifting floury, grainy or granular products, consisting of a screen box (1) having a bottom panel (2) and at least one drop-through channel (6) for a product and also a screen insert frame (5) which is covered with a screen cloth, wherein the drop-through channel (6) is formed between the screen box (1) and outer side walls (3), characterized in that the screen box (1) has corner pieces (7), which project laterally over the bottom panel (2) in order to be able to centre the screen box (1) properly within the outer side walls (3) and in order to form large drop-through channels (6) having a width of at least 9 cm.
  2. Screen according to Claim 1, characterized in that the drop-through channel (6) is approximately 13 cm wide.
  3. Screen according to Claim 1 or 2, characterized in that two drop-through channels (6) are provided.
  4. Screen according to at least one of Claims 1 to 3, characterized in that the screen box (1) consists of a plastics material, in particular of a foamable plastics material.
  5. Screen according to at least one of Claims 1 to 4, characterized in that the screen insert frame (5) consists of metal, in particular of a stainless steel.
EP07700128A 2006-02-08 2007-01-26 Sieve Active EP1981653B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006005967A DE102006005967A1 (en) 2006-02-08 2006-02-08 scree
PCT/CH2007/000035 WO2007090304A1 (en) 2006-02-08 2007-01-26 Sieve

Publications (2)

Publication Number Publication Date
EP1981653A1 EP1981653A1 (en) 2008-10-22
EP1981653B1 true EP1981653B1 (en) 2011-10-19

Family

ID=38282277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07700128A Active EP1981653B1 (en) 2006-02-08 2007-01-26 Sieve

Country Status (12)

Country Link
US (1) US20090084712A1 (en)
EP (1) EP1981653B1 (en)
JP (1) JP2009525852A (en)
KR (1) KR20080098483A (en)
CN (1) CN101378848B (en)
AT (1) ATE529197T1 (en)
AU (1) AU2007214235B2 (en)
BR (1) BRPI0707707A2 (en)
DE (1) DE102006005967A1 (en)
ES (1) ES2373332T3 (en)
WO (1) WO2007090304A1 (en)
ZA (1) ZA200806151B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20110094A1 (en) * 2011-03-28 2012-09-29 Omas Srl SIZE HOLDER FRAME
CH720205A1 (en) * 2022-11-07 2024-05-15 Swisca Ag Sieving device for plan sifters for fractionating grain mill products

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455383A (en) * 1947-09-16 1948-12-07 Richmond Mfg Company Screen for gyratory sifters, screens, or bolting equipment
US3422955A (en) * 1966-04-11 1969-01-21 Smico Inc Superimposed gyratory sifters
CH625430A5 (en) * 1977-11-22 1981-09-30 Budapesti Elelmiszeripari Gepg Basic frame for screening boxes
DE4101710A1 (en) * 1991-01-22 1992-07-23 Hein Lehmann Trenn Foerder SCREEN AREA FOR A SCREENING MACHINE
CH685604A5 (en) * 1992-02-29 1995-08-31 Buehler Ag Plansifter.
JP3316032B2 (en) * 1993-05-11 2002-08-19 日清製粉株式会社 Sieve frame for granular material sieving machine
US5598931A (en) * 1994-10-11 1997-02-04 Nisshin Flour Milling Co., Ltd. Sifter frame for powder particle sifter
JP3479565B2 (en) * 1994-10-28 2003-12-15 日清製粉株式会社 Sieve frame for multi-stage lamination type used for granular material sieve device
DE19706601C1 (en) * 1997-02-20 1998-11-12 Buehler Ag Screen frame for plansifter and process for its production
DE19825617A1 (en) * 1998-06-08 1999-12-09 Filip Gmbh Muellereibuersten Device for cleaning the sieve frame and bottom of a sieve box
JP4176226B2 (en) * 1999-02-25 2008-11-05 日清製粉株式会社 Method for screening powder particles
DE102007004150A1 (en) * 2007-01-22 2008-07-24 Bühler AG Plansichter

Also Published As

Publication number Publication date
ATE529197T1 (en) 2011-11-15
ZA200806151B (en) 2009-04-29
ES2373332T3 (en) 2012-02-02
JP2009525852A (en) 2009-07-16
WO2007090304A1 (en) 2007-08-16
BRPI0707707A2 (en) 2011-05-10
AU2007214235A1 (en) 2007-08-16
EP1981653A1 (en) 2008-10-22
US20090084712A1 (en) 2009-04-02
CN101378848A (en) 2009-03-04
CN101378848B (en) 2013-02-13
KR20080098483A (en) 2008-11-10
DE102006005967A1 (en) 2007-08-09
AU2007214235B2 (en) 2011-04-21

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