WO1998036854A1 - Siebrahmen für plansichter und verfahren zu dessen herstellung - Google Patents
Siebrahmen für plansichter und verfahren zu dessen herstellung Download PDFInfo
- Publication number
- WO1998036854A1 WO1998036854A1 PCT/CH1998/000023 CH9800023W WO9836854A1 WO 1998036854 A1 WO1998036854 A1 WO 1998036854A1 CH 9800023 W CH9800023 W CH 9800023W WO 9836854 A1 WO9836854 A1 WO 9836854A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sieve
- frame
- screen
- fabric
- foamed
- Prior art date
Links
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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4618—Manufacturing of screening surfaces
-
- 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
- B07B1/50—Cleaning
- B07B1/52—Cleaning with brushes or scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
Definitions
- the invention relates to a sieve frame for plan sifters, in particular an insertion sieve frame, which is inserted into a sieve box of a sieve, and a method for producing such sieve frames.
- a plan sifter especially a large plan sifter or square plan sifter is a cube shape with large surface elements and is used to sift grist, semolina and flour-like products in the mill and to sort various types of grains from grain and the like. like.
- Cereal grinding products for flour, semolina, haze etc. an optimal grinding moisture should be aimed for.
- the moisture depends on the grinding and not on the best possible visual effect.
- the sieve fabric is stretched on a sieve frame and this in turn is placed in a sieve box, which has a base plate and a fine material discharge as well as freely movable cleaning elements, as z. B. is described in EP-B-584302, EP-A-330846 or US-PS 3565251 and others.
- the highest possible throughput and the highest possible quality of the ground products must be achievable.
- a closed product layer of up to several centimeters is maintained with the miller sifting over the screen covering. This ensures that a greater downward pressure acts on the finer, heavier particles against the sieve covering, which results in a higher throughput or a higher sieving capacity.
- Tissue wear but also the degree of tension of the screen fabric is important.
- a plan sifter has natural performance limits, such as: B. the intensity of the oscillating movement (maximum acceleration) by the maximum permissible forces in the plan sifter housing, on the other hand by the movement behavior of the product. Accelerating forces that are too strong impede the free flow of the product.
- the performance data are given.
- DE-A-2506981 it is proposed to give the base plate a sawtooth-shaped surface, so that the product discharge should proceed suddenly and in a short time.
- advantages are conceivable, but it can also be expected that fine grinding fractions will quickly clog the base plates or sieve boxes.
- One main requirement, however, is that such a key machine functions as self-cleaning as possible and can be cleaned easily and with little effort if necessary.
- a plan sifter screen which has a screen housing with fines discharge, an insert screen frame and freely moving cleaning elements, the screen frame being provided only with a one-sided coating and Has ridges in at least one direction to form a corresponding number of cleaning fields and base plate and furthermore cleaning elements lying on the base plate can be inserted into the cleaning field or fields. Corrugated grids or support gratings are no longer required with these solutions.
- the screen frame is designed as an insert frame without connecting elements, but consists of assembled individual parts, preferably made of metal or a metal-wood composite.
- the screen frame is advantageously made of light metal profiles as a welded or adhesive bond.
- the inherent stiffness is sufficiently high to absorb the forces that occur with only one-sided screen covering without significant deformation.
- Such a light metal frame, in particular made of aluminum may be subject to country-specific approval problems, the manufacturing outlay is comparatively high (even if it is already significantly lower than with conventional screwing or the like) and strength problems of the connection points (in particular glue points) are possible due to the dynamic load .
- the screen box is designed in a known manner as a dimensionally stable and dimensionally stable wooden frame and product-carrying surfaces can be coated with plastic. Sieve frame and sieve box are coordinated so that the former can be loosely placed on or in the sieve box.
- the bottom plate of the sieve box can consist of both metal and plastic, the latter being tailored to specific cases.
- EP-A-330849 it is also known to provide the inner surfaces of the classifier housing made of aluminum with a food-compatible and wear-resistant lining made of foamed plastic, also for noise insulation and sealing.
- the invention is based on the object of developing a generic insert screen frame in such a way that its functionality is improved and production is simplified.
- the task is also to develop an improved method for producing the screen frame.
- the sieve frame including the web strips, consists of a plastic and preferably contains a stiffening skeleton.
- the skeleton is a welded metal profile frame.
- the plastic is preferably a foamed plastic, in particular a PUR material.
- Sealing elements can also be foamed in as a replacement for the usual felt seals.
- the screen mesh is also foamed.
- the object is achieved in that the skeleton and the sieve fabric are placed in a mold and then in one step the complete frame is foamed or foamed in, with simultaneous, depending on the fabric thickness, etc., different tensioning of the sieve fabric.
- the screen fabric is surrounded by plastic or is embedded in it.
- the insert screen frame basically has the advantages described in EP-B-584302, ie it can be easily removed from a screen box and the screen fabric can be cleaned on both sides with the least effort, including treatment with water, superheated steam or the like in the plan sifter compartment can equally advantageously take place.
- the advantageous design of the base plate made of plastic significantly reduces product adherence and contributes to noise reduction, also in connection with the use of plastic screen cleaners.
- Fig. 1 a sieve frame
- Fig. 3 a sieve box, with a partially resting sieve frame.
- a sieve frame 1 often has 6-12 cleaning fields with a rectangular shape. In FIG. 1, only one subdivision into four cleaning fields by means of web strips 2 is shown in simplified form. With regard to a detailed representation of the well-known sieve box 6, z. B. refer to EP-B-584302.
- the sieve frame 1 as a freely replaceable insert sieve frame, has only a small height dimension, the inherent rigidity of which is sufficiently high due to a continuous metal core 3. This metal core 3 is surrounded by foamed PUR and thus forms a one-piece sieve frame 1.
- the sieve fabric 4 lies tightly on the sieve frame 1 and the web strips 2 and is foam-bonded at these points so that weakening of the fabric tension is prevented.
- the screen box 6 has foamed seals 5 ′, just as the screen frame 1 can have such seals 5 instead of the conventional felt seals.
- the bottom 7 of the sieve box 6 is also a foamed PUR part, on which known sieve cleaners 8, 8 'are freely movable (with respect to the cleaning field).
- the sieve frame (1) closes the sieve box (6) flush with the sieve mesh (4).
- the sieve frame 1 is produced by first inserting the metal core 3 in the form of a welded joint made of round steel profile parts or the like into a shape (not shown). Subsequently, the sieve fabric 4 is arranged in such a way that it is completely foamed in the sieve frame 1 and the web strips 2 while being braced at the same time. The latter can be done in different ways. In this way, the sieve fabric 4 can be placed flat on the sieve frame 1, any protrusions still having to be removed after the foaming. Or the screen fabric 4 is completely or partially foamed at the level of the screen frame 1 and a combination of both variants is also possible.
- the PU foam is then introduced and the finished screen frame can be removed after curing.
- the PUR material is preferably food approved.
- the invention is not limited to this example.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Combined Means For Separation Of Solids (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL98334854A PL334854A1 (en) | 1997-02-20 | 1998-01-23 | Sieve frame of a flat sifter and ethod of making same |
JP53611998A JP2001511699A (ja) | 1997-02-20 | 1998-01-23 | 平面篩に対する篩枠およびその製造方法 |
UA99095171A UA57606C2 (uk) | 1997-02-20 | 1998-01-23 | Ситова рама для горизонтальних просіювачів і спосіб її виготовлення |
AU55471/98A AU728681B2 (en) | 1997-02-20 | 1998-01-23 | Sieve frame for plan sifters and method of producing it |
RO99-00890A RO117904B1 (ro) | 1997-02-20 | 1998-01-23 | Rama de sita pentru site plane si procedeu pentru confectionarea ei |
US09/341,363 US6202857B1 (en) | 1997-02-20 | 1998-01-23 | Frame for flat sifter and process for producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19706601A DE19706601C1 (de) | 1997-02-20 | 1997-02-20 | Siebrahmen für Plansichter und Verfahren zu dessen Herstellung |
DE19706601.1 | 1997-02-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998036854A1 true WO1998036854A1 (de) | 1998-08-27 |
Family
ID=7820858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1998/000023 WO1998036854A1 (de) | 1997-02-20 | 1998-01-23 | Siebrahmen für plansichter und verfahren zu dessen herstellung |
Country Status (13)
Country | Link |
---|---|
US (1) | US6202857B1 (de) |
JP (1) | JP2001511699A (de) |
CN (1) | CN1246813A (de) |
AU (1) | AU728681B2 (de) |
DE (1) | DE19706601C1 (de) |
HU (1) | HUP0000634A3 (de) |
PL (1) | PL334854A1 (de) |
RO (1) | RO117904B1 (de) |
RU (1) | RU2203149C2 (de) |
TR (1) | TR199901994T2 (de) |
UA (1) | UA57606C2 (de) |
WO (1) | WO1998036854A1 (de) |
ZA (1) | ZA981353B (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007090304A1 (de) * | 2006-02-08 | 2007-08-16 | Bühler AG | Sieb |
CN102000465A (zh) * | 2010-11-02 | 2011-04-06 | 重庆国际复合材料有限公司 | 箱式收尘装置 |
CN109178362A (zh) * | 2018-09-20 | 2019-01-11 | 烟台市奥境数字科技有限公司 | 一种可在铲料时进行饲料颗粒筛除的灌装器 |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE279268T1 (de) * | 1997-03-01 | 2004-10-15 | United Wire Ltd | Vorrichtung zum reparieren oder renovieren eines filtersiebes |
GB0127085D0 (en) * | 2001-11-10 | 2002-01-02 | United Wire Ltd | Improved screen for separating solids from liquids |
US7303079B2 (en) * | 2002-01-08 | 2007-12-04 | Rcm Plastics Cc | Screening element |
US7757864B2 (en) * | 2004-06-15 | 2010-07-20 | M-I L.L.C. | Screen assembly designed to conform to the radius of vibrating shakers with crowned decks |
JP4688132B2 (ja) * | 2004-11-08 | 2011-05-25 | 株式会社興和工業所 | 分離枠及び振動分離装置並びに分離枠の製造方法 |
GB0427756D0 (en) * | 2004-12-18 | 2005-01-19 | United Wire Ltd | Improvements in and relating to sifting screens |
JP2007105629A (ja) * | 2005-10-13 | 2007-04-26 | Kowa Industry Co Ltd | 振動篩装置 |
WO2007061447A2 (en) * | 2005-11-15 | 2007-05-31 | Sefar Filtration Inc. | Disposable pre-tensioned sieve frame and method of making same |
CN101209447A (zh) * | 2006-12-25 | 2008-07-02 | 李光淳 | 封闭式药筛 |
US8113358B2 (en) * | 2007-04-04 | 2012-02-14 | M-I Llc | Pre-tensioned sifter screen |
ZA201006277B (en) * | 2009-08-28 | 2012-01-25 | Allan Maskew (Pty) Ltd | A mine screen |
SE534711C2 (sv) * | 2010-03-15 | 2011-11-29 | Sandvik Intellectual Property | Stödbärare hos en stödstruktur för vibrationssiktar |
JP5419288B2 (ja) * | 2010-05-28 | 2014-02-19 | 株式会社東京製粉機製作所 | 篩装置 |
GB2490647B (en) * | 2011-01-27 | 2013-05-22 | Nat Oilwell Varco Lp | Screen assembly and a method for making same |
US8679328B2 (en) * | 2012-04-10 | 2014-03-25 | Frank Hebert | Floor drain cover |
JP6037202B2 (ja) * | 2012-06-07 | 2016-12-07 | 株式会社リコー | 振動篩装置 |
CN105537108B (zh) * | 2012-10-16 | 2020-07-14 | 德里克公司 | 用于筛选的方法和设备 |
MX2015015068A (es) * | 2013-04-30 | 2016-03-03 | M I Drilling Fluids Uk Ltd | Filtro con miembros de la estructura con superficie/s inclinada/s. |
JP6091344B2 (ja) * | 2013-06-05 | 2017-03-08 | 株式会社オプトニクス精密 | 篩および篩の製造方法 |
EP3135385B2 (de) * | 2015-08-25 | 2022-02-09 | Andreas Massold | Deckel für einen flüssigkeitsbehälter für eine spritzpistole |
PL422516A1 (pl) * | 2017-08-10 | 2019-02-11 | Jacek Piotrowicz | Siatka budowlana podwyższona |
AU2018326599B2 (en) * | 2017-09-01 | 2021-09-30 | Derrick Corporation | Deblinding apparatuses and methods for screening |
JP2019181352A (ja) * | 2018-04-06 | 2019-10-24 | 株式会社オプトニクス精密 | メッシュ部材 |
CN108635926A (zh) * | 2018-07-10 | 2018-10-12 | 张家港市金星纺织有限公司 | 一种用于氨纶丝原液的过滤板 |
EP4197655A1 (de) | 2021-12-20 | 2023-06-21 | Bühler AG | Sieb und rahmen mit verbesserten verbindungsmöglichkeiten |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB726580A (en) * | 1952-03-24 | 1955-03-23 | Ottwil Knauff | Improvements in or relating to plansifters |
US3107991A (en) * | 1962-01-02 | 1963-10-22 | Arundale Mfg Company | Screen |
WO1993016815A1 (de) * | 1992-02-29 | 1993-09-02 | Bühler AG | Vorrichtung für plansichter |
US5527500A (en) * | 1994-06-02 | 1996-06-18 | The Tensar Corporation | Method of forming a framed panel utilizing tensioning by heat shrinking |
Family Cites Families (22)
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US2455383A (en) * | 1947-09-16 | 1948-12-07 | Richmond Mfg Company | Screen for gyratory sifters, screens, or bolting equipment |
US3565251A (en) * | 1968-12-30 | 1971-02-23 | Blaw Knox Co | Plastic internal screen |
US3980555A (en) * | 1973-08-24 | 1976-09-14 | Screenex Wire Weaving Manufacturers Limited | Replacable screen with frame |
JPS5237915Y2 (de) * | 1974-06-11 | 1977-08-29 | ||
GB1600604A (en) * | 1977-04-07 | 1981-10-21 | Greening N Ltd | Support frame for a screeing machine |
CA1102282A (en) * | 1977-08-10 | 1981-06-02 | Hunter Wire Products Limited | Snap-fitting screening module for longitudinal supports |
DE3008931A1 (de) * | 1980-03-08 | 1981-09-17 | Hein, Lehmann AG, 4000 Düsseldorf | Systemsiebboden |
GB8418658D0 (en) * | 1984-07-21 | 1984-08-22 | Thule United Ltd | Filtering screens |
DE3542635C1 (de) * | 1985-12-03 | 1987-02-19 | Steinhaus Gmbh | Siebbauteil fuer Systemsiebboeden |
DE3706402C1 (de) * | 1987-02-27 | 1988-07-07 | Finckh Maschf | Siebsegment fuer Filter zum Eindicken von Fasersuspensionen |
DE3802799A1 (de) * | 1988-01-30 | 1989-08-10 | Reinhard Rueter | Plansichter |
US5137622A (en) * | 1988-09-27 | 1992-08-11 | United Wire Limited | Filter screen assembly |
US5045184A (en) * | 1989-12-12 | 1991-09-03 | Arkles Basil R | Vibrating screen panel |
US5051171A (en) * | 1990-04-27 | 1991-09-24 | Sweco Incorporated | Self-cleaning system for vibratory screens |
US5266194A (en) * | 1992-08-20 | 1993-11-30 | Manufacturers Components, Inc. | Unimold filter |
DE4300303A1 (de) * | 1993-01-08 | 1994-07-14 | Ludwig Krieger Draht Und Kunst | Spannsieb |
US5385669A (en) * | 1993-04-30 | 1995-01-31 | Environmental Procedures, Inc. | Mining screen device and grid structure therefor |
US5598931A (en) * | 1994-10-11 | 1997-02-04 | Nisshin Flour Milling Co., Ltd. | Sifter frame for powder particle sifter |
US5819952A (en) * | 1995-08-29 | 1998-10-13 | United Wire Limited | Sifting screen |
US5851393A (en) * | 1995-11-14 | 1998-12-22 | Emerson Electric Co. | Screen assembly |
US5755334A (en) * | 1996-03-19 | 1998-05-26 | Illinois Tool Works Inc. | Method and apparatus for mounting a panel on a support member |
US6006923A (en) * | 1997-06-17 | 1999-12-28 | Tandem Products, Inc. | Screening apparatus |
-
1997
- 1997-02-20 DE DE19706601A patent/DE19706601C1/de not_active Expired - Fee Related
-
1998
- 1998-01-23 UA UA99095171A patent/UA57606C2/uk unknown
- 1998-01-23 HU HU0000634A patent/HUP0000634A3/hu unknown
- 1998-01-23 RO RO99-00890A patent/RO117904B1/ro unknown
- 1998-01-23 WO PCT/CH1998/000023 patent/WO1998036854A1/de not_active Application Discontinuation
- 1998-01-23 US US09/341,363 patent/US6202857B1/en not_active Expired - Fee Related
- 1998-01-23 AU AU55471/98A patent/AU728681B2/en not_active Ceased
- 1998-01-23 CN CN98802429A patent/CN1246813A/zh active Pending
- 1998-01-23 RU RU99120111/03A patent/RU2203149C2/ru not_active IP Right Cessation
- 1998-01-23 JP JP53611998A patent/JP2001511699A/ja active Pending
- 1998-01-23 PL PL98334854A patent/PL334854A1/xx unknown
- 1998-01-23 TR TR1999/01994T patent/TR199901994T2/xx unknown
- 1998-02-18 ZA ZA981353A patent/ZA981353B/xx unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB726580A (en) * | 1952-03-24 | 1955-03-23 | Ottwil Knauff | Improvements in or relating to plansifters |
US3107991A (en) * | 1962-01-02 | 1963-10-22 | Arundale Mfg Company | Screen |
WO1993016815A1 (de) * | 1992-02-29 | 1993-09-02 | Bühler AG | Vorrichtung für plansichter |
US5527500A (en) * | 1994-06-02 | 1996-06-18 | The Tensar Corporation | Method of forming a framed panel utilizing tensioning by heat shrinking |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007090304A1 (de) * | 2006-02-08 | 2007-08-16 | Bühler AG | Sieb |
AU2007214235B2 (en) * | 2006-02-08 | 2011-04-21 | Buhler Ag | Sieve |
CN102000465A (zh) * | 2010-11-02 | 2011-04-06 | 重庆国际复合材料有限公司 | 箱式收尘装置 |
CN102000465B (zh) * | 2010-11-02 | 2012-10-10 | 重庆国际复合材料有限公司 | 箱式收尘装置 |
CN109178362A (zh) * | 2018-09-20 | 2019-01-11 | 烟台市奥境数字科技有限公司 | 一种可在铲料时进行饲料颗粒筛除的灌装器 |
Also Published As
Publication number | Publication date |
---|---|
AU728681B2 (en) | 2001-01-18 |
RO117904B1 (ro) | 2002-09-30 |
JP2001511699A (ja) | 2001-08-14 |
US6202857B1 (en) | 2001-03-20 |
DE19706601C1 (de) | 1998-11-12 |
HUP0000634A2 (en) | 2000-07-28 |
UA57606C2 (uk) | 2003-06-16 |
PL334854A1 (en) | 2000-03-27 |
HUP0000634A3 (en) | 2001-10-29 |
CN1246813A (zh) | 2000-03-08 |
TR199901994T2 (xx) | 2000-07-21 |
RU2203149C2 (ru) | 2003-04-27 |
AU5547198A (en) | 1998-09-09 |
ZA981353B (en) | 1998-08-27 |
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