EP0050709B1 - Screen plate - Google Patents

Screen plate Download PDF

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Publication number
EP0050709B1
EP0050709B1 EP81105234A EP81105234A EP0050709B1 EP 0050709 B1 EP0050709 B1 EP 0050709B1 EP 81105234 A EP81105234 A EP 81105234A EP 81105234 A EP81105234 A EP 81105234A EP 0050709 B1 EP0050709 B1 EP 0050709B1
Authority
EP
European Patent Office
Prior art keywords
strips
screen
screen plate
bands
cast
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
Application number
EP81105234A
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German (de)
French (fr)
Other versions
EP0050709A1 (en
Inventor
Edmund Pürkhard
Max Fuchs
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.)
Carl Schenck AG
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Carl Schenck AG
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 Carl Schenck AG filed Critical Carl Schenck AG
Priority to AT81105234T priority Critical patent/ATE13020T1/en
Publication of EP0050709A1 publication Critical patent/EP0050709A1/en
Application granted granted Critical
Publication of EP0050709B1 publication Critical patent/EP0050709B1/en
Expired 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
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/469—Perforated sheet-like material

Definitions

  • the invention relates to a sieve plate made of steel or cast iron for hot and highly abrasive bulk materials, with a support made of heat-resistant armor material.
  • a sieve plate made of pre-perforated steel plates, on which a wear-resistant surface made of heat-resistant, wear-resistant materials is applied, is known from DE-B-2 318 646.
  • Such pre-punched steel plates involve a high manufacturing effort and are e.g. not suitable for sieves with smaller sieve openings.
  • the sieve openings are exposed to high wear on bulk materials that are subject to high wear.
  • a sieve plate which consists of rubber and has a metal support plate. Cast iron strips are embedded in the sieve plate or received in grooves in the sieve plate.
  • a sieve plate is for hot bulk goods, e.g. Hot sintering, unsuitable, since neither the rubber base material nor the strips made of cast iron can withstand the high temperatures that occur with such bulk materials.
  • Cast sieve plates are known in various embodiments. A number of differently composed and alloyed steels and cast iron in a suitable composition can be used as casting materials. The previously known cast sieve plates have the disadvantage that they wear out quickly when subjected to high loads, in particular when used for hot and extremely abrasive bulk materials.
  • the object of the present invention is to provide a sieve plate which is particularly well suited for hot and highly abrasive bulk materials and which is particularly wear-resistant. This object is achieved by the features specified in the patent claims. The claims also cover embodiments of the invention.
  • the arrangement of strips or strips made of a heat-resistant armor material running in the conveying direction increases the service life of a cast sieve plate and improves the sieving performance.
  • Coarse-grained and heavy material components lie on the wear-resistant strips and do not come into direct contact with the underlying screen surface.
  • the fine goods cause less wear than coarse goods. Therefore, in the proposed arrangement, the perforated surfaces are less stressed and the wear on these surfaces is reduced. Since coarse screenings do not touch the screen surface, this is better used for the screening process.
  • the arrangement of wear strips reduces the contact area of the hot material to be sieved with the sieve plate. As a result, the screen plate is heated up less, which also contributes to reducing wear.
  • the subclaims relate to expedient and advantageous embodiments of the invention, for example a cast base plate with material strips made of heat-resistant armor material, the arrangement of webs, the connection of the material strips and / or webs to the base plate, the execution of the screen perforation, the additional armoring of the screen plate and the arrangement of sieve plates with a sieve covering.
  • the sieve plates which are shown in sections in the figures and are cast from heat-resistant materials (special steel), consist of a base plate 1 with the sieve holes 2.
  • the sieve holes have the shape of elongated holes, which are arranged in rows as seen in the conveying direction.
  • the longitudinal direction of the screen holes forms an angle of approximately 45 ° with the conveying direction indicated by arrows (see FIGS. 3 and 4).
  • the sieve holes can also have a shape that differs from the illustrated exemplary embodiments and e.g. be round. As shown in the drawings, the sieve holes can be flared downwards.
  • the sieve holes are alternately offset by approximately 90 ° in their longitudinal direction. This type of perforation is advantageous for smaller sieve openings and results in good sieving performance.
  • Strips 3 made of heat-resistant armor material are arranged on the base plate 1 in the conveying direction.
  • the armor material is welded directly onto the base plate.
  • the base plate 1 has webs 4 and 5.
  • the cross-sections of the webs are approximately rectangular to square, the web flanks being able to be inclined or curved towards the center of the web.
  • the web 4 is part of the cast base plate itself.
  • the web is welded onto the base plate, as shown for web 5.
  • the webs are connected on their wide side to the base plate, but they can also be arranged in an upright position.
  • the material strips 3 are reinforced with material strips 3 made of a heat-resistant armor material.
  • the armor material can be welded onto the webs or connected to the webs in some other way.
  • the web flanks 7 and 8 can also be provided completely or partially with armor material. The webs run in the conveying direction of the material to be screened.
  • the screen holes 2 are located in the base plate 1 below the upper channel te of the sieve plate. They are therefore less stressed by the material to be treated, especially by large and heavy material components. At the same time, the sieving performance is improved.
  • the screen plate in the area of the screen holes can additionally be armored with armor material.
  • the height of the armor 6 can be equal to or less than the height of the armored strips or strips.
  • the shape of the armor can differ from the exemplary embodiment shown in FIG. 4. For example, individual beads made of armored material can be welded on the surface of the perforated screen in the longitudinal or transverse direction.
  • the screen plates are arranged in rows one behind the other (in the conveying direction) and next to one another (transversely to the conveying direction).
  • the transverse rows of the sieve plates can be installed offset to one another or manufactured in such a way that the strips alternate with the perforations in the conveying direction with armored strips or strips (checkerboard-like offset of the perforated strips or the armored strips).

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Electromechanical Clocks (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Dry Shavers And Clippers (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

1. Screen plate of steel or cast iron for hot loose material which causes intense wear, with a support of heat-resistant armour, characterized in that the screen plate is cast, that the heat-resistant armour is arranged in the form of strips or bands (3) running in the conveying direction on the screen plate and that the screen perforation (2) is arranged sunken between the strips or bands (3).

Description

Die Erfindung betrifft eine Siebplatte aus Stahl oder Gusseisen für heisse und stark schleissende Schüttgüter, mit einer Auflage aus hitzebeständigem Panzerwerkstoff.The invention relates to a sieve plate made of steel or cast iron for hot and highly abrasive bulk materials, with a support made of heat-resistant armor material.

Eine Siebplatte aus vorgelochten Stahlplatten, auf der eine verschleissfeste Oberfläche aus hitzebeständigen, verschleissfesten Werkstoffen aufgebracht ist, ist aus der DE-B-2 318 646 bekannt. Solche vorgelochten Stahlplatten bedingen jedoch einen hohen Fertigungsaufwand und sind z.B. nicht für Siebe mit kleineren Sieböffnungen geeignet. Zudem sind die Sieböffnungen bei stark schleissenden Schüttgütern einem hohen Verschleiss ausgesetzt.A sieve plate made of pre-perforated steel plates, on which a wear-resistant surface made of heat-resistant, wear-resistant materials is applied, is known from DE-B-2 318 646. Such pre-punched steel plates, however, involve a high manufacturing effort and are e.g. not suitable for sieves with smaller sieve openings. In addition, the sieve openings are exposed to high wear on bulk materials that are subject to high wear.

Aus der AU-B-17 802/76 ist eine Siebplatte bekannt, die aus Gummi besteht und eine metallene Stützplatte aufweist. In die Siebplatte sind Leisten aus Gusseisen eingelassen bzw. in Nuten der Siebplatte aufgenommen. Eine solche Siebplatte ist jedoch für heisse Schüttgüter, z.B. Heisssinter, ungeeignet, da weder das Gummigrundmaterial noch die Leisten aus Gusseisen den bei solchen Schüttgütern auftretenden hohen Temperaturen widerstehen.From AU-B-17 802/76 a sieve plate is known which consists of rubber and has a metal support plate. Cast iron strips are embedded in the sieve plate or received in grooves in the sieve plate. However, such a sieve plate is for hot bulk goods, e.g. Hot sintering, unsuitable, since neither the rubber base material nor the strips made of cast iron can withstand the high temperatures that occur with such bulk materials.

Gegossene Siebplatten sind in verschiedenen Ausführungsformen bekannt. Als Gusswerkstoffe können eine Reihe von unterschiedlich zusammengesetzten und legierten Stählen und Gusseisen in geeigneter Zusammensetzung verwendet werden. Die bisher bekannten gegossenen Siebplatten haben den Nachteil, dass die bei hoher Beanspruchung, insbesondere bei Verwendung für heisse und stark schleissende Schüttgüter, schnell verschleissen.Cast sieve plates are known in various embodiments. A number of differently composed and alloyed steels and cast iron in a suitable composition can be used as casting materials. The previously known cast sieve plates have the disadvantage that they wear out quickly when subjected to high loads, in particular when used for hot and extremely abrasive bulk materials.

Aufgabe der vorliegenden Erfindung ist es, eine Siebplatte zu schaffen, die besonders gut für heisse und stark schleissende Schüttgüter geeignet und die besonders verschleissfest ist. Diese Aufgabe wird durch die in den Patentansprüchen angegebenen Merkmale gelöst. Die Ansprüche erfassen auch Ausgestaltungen der Erfindung.The object of the present invention is to provide a sieve plate which is particularly well suited for hot and highly abrasive bulk materials and which is particularly wear-resistant. This object is achieved by the features specified in the patent claims. The claims also cover embodiments of the invention.

Durch die Anordnung von in Förderrichtung verlaufenden Streifen oder Leisten aus einem hitzebeständigen Panzerwerkstoff wird die Lebensdauer einer gegossenen Siebplatte erhöht und die Siebleistung verbessert. Grobkörnige und schwere Materialbestandteile liegen auf den verschleissfesten Streifen auf und kommen mit der tiefer liegenden eigentlichen Siebfläche nicht direkt in Berührung. Das Feingut verursacht jedoch einen geringeren Verschleiss als grobe Gutstücke. Daher werden bei der vorgeschlagenen Anordnung die gelochten Flächen weniger stark beansprucht und der Verschleiss an diesen Flächen herabgesetzt. Da grobes Siebgut die Siebfläche nicht berührt, wird diese für den Siebvorgang besser ausgenutzt. Durch die Anordnung von Schleissleisten wird die Kontaktfläche des heissen Siebgutes mit der Siebplatte kleiner. Dadurch wird die Siebplatte weniger stark aufgeheizt, was ebenfalls zur Verschleissminderung beiträgt.The arrangement of strips or strips made of a heat-resistant armor material running in the conveying direction increases the service life of a cast sieve plate and improves the sieving performance. Coarse-grained and heavy material components lie on the wear-resistant strips and do not come into direct contact with the underlying screen surface. However, the fine goods cause less wear than coarse goods. Therefore, in the proposed arrangement, the perforated surfaces are less stressed and the wear on these surfaces is reduced. Since coarse screenings do not touch the screen surface, this is better used for the screening process. The arrangement of wear strips reduces the contact area of the hot material to be sieved with the sieve plate. As a result, the screen plate is heated up less, which also contributes to reducing wear.

Die Unteransprüche betreffen zweckmässige und vorteilhafte Ausgestaltungen der Erfindung, beispielsweise eine gegossene Grundplatte mit Materialstreifen aus hitzebeständigem Panzerwerkstoff, die Anordnung von Stegen, die Verbindung der Materialstreifen und/oder Stege mit der Grundplatte, die Ausführung der Sieblochung, die zusätzliche Aufpanzerung der Siebplatte sowie die Anordnung von Siebplatten bei einem Siebbelag.The subclaims relate to expedient and advantageous embodiments of the invention, for example a cast base plate with material strips made of heat-resistant armor material, the arrangement of webs, the connection of the material strips and / or webs to the base plate, the execution of the screen perforation, the additional armoring of the screen plate and the arrangement of sieve plates with a sieve covering.

In den Zeichnungen sind schematisch Ausführungsbeispiele der Erfindung dargestellt. Es zeigen:

  • Fig. 1 und 3 Ausschnitt aus einer gegossenen Siebplatte mit aufgeschweissten Streifen aus Panzerwerkstoff (Fig. 1 Schnitt, Fig. 3 Draufsicht), .
  • Fig. 2 und 4 Ausschnitt aus einer gegossenen Siebplatte mit Stegen, die mit Panzerwerkstoff bewehrt sind (Fig. 2 Schnitt, Fig. 4 Draufsicht).
Exemplary embodiments of the invention are shown schematically in the drawings. Show it:
  • 1 and 3 detail of a cast sieve plate with welded strips of armor material (Fig. 1 section, Fig. 3 top view).
  • Fig. 2 and 4 detail of a cast sieve plate with webs, which are reinforced with armor material (Fig. 2 section, Fig. 4 top view).

Die in den Figuren ausschnittsweise dargestellten, aus hitzebeständigen Werkstoffen (Sonderstahl) gegossenen Siebplatten bestehen aus einer Grundplatte 1 mit den Sieblöchern 2. Die Sieblöcher haben die Form von Langlöchern, die in Förderrichtung gesehen hintereinander in Reihen angeordnet sind. Die Längsrichtung der Sieblöcher bildet mit der durch Pfeile angedeuteten Förderrichtung einen Winkel von etwa 45° (siehe Fig. 3 und 4). Die Sieblöcher können auch eine von den dargestellten Ausführungsbeispielen abweichende Form aufweisen und z.B. rund sein. Wie in den Zeichnungen dargestellt können die Sieblöcher nach unten konisch erweitert sein.The sieve plates, which are shown in sections in the figures and are cast from heat-resistant materials (special steel), consist of a base plate 1 with the sieve holes 2. The sieve holes have the shape of elongated holes, which are arranged in rows as seen in the conveying direction. The longitudinal direction of the screen holes forms an angle of approximately 45 ° with the conveying direction indicated by arrows (see FIGS. 3 and 4). The sieve holes can also have a shape that differs from the illustrated exemplary embodiments and e.g. be round. As shown in the drawings, the sieve holes can be flared downwards.

Bei der Anordnung nach Fig. 4 sind die Sieblöcher in ihrer Längsrichtung abwechselnd um etwa 90° zueinander versetzt angeordnet. Diese Art der Sieblochung ist bei kleineren Sieböffnungen vorteilhaft und ergibt gute Siebleistungen.In the arrangement according to FIG. 4, the sieve holes are alternately offset by approximately 90 ° in their longitudinal direction. This type of perforation is advantageous for smaller sieve openings and results in good sieving performance.

Auf der Grundplatte 1 sind in Förderrichtung verlaufende Streifen 3 aus hitzebeständigem Panzerwerkstoff angeordnet. Im Ausführungsbeispiel nach den Figuren 1 und 3 ist der Panzerwerkstoff unmittelbar auf die Grundplatte aufgeschweisst. Im Ausführungsbeispiel nach den Figuren 2 und 4 weist die Grundplatte 1 Stege 4 und 5 auf. Die Stege sind im Querschnitt etwa rechteckig bis quadratisch, wobei die Stegflanken zur Stegmitte hin geneigt oder gekrümmt sein können. Der Steg 4 ist Bestandteil der gegossenen Grundplatte selbst. In einer anderen Ausführungsform ist der Steg auf die Grundplatte aufgeschweisst, wie bei Steg 5 dargestellt. Die Stege sind in den Ausführungsbeispielen an ihrer breiten Seite mit der Grundplatte verbunden, sie können jedoch auch hochkant angeordnet sein.Strips 3 made of heat-resistant armor material are arranged on the base plate 1 in the conveying direction. In the exemplary embodiment according to FIGS. 1 and 3, the armor material is welded directly onto the base plate. In the exemplary embodiment according to FIGS. 2 and 4, the base plate 1 has webs 4 and 5. The cross-sections of the webs are approximately rectangular to square, the web flanks being able to be inclined or curved towards the center of the web. The web 4 is part of the cast base plate itself. In another embodiment, the web is welded onto the base plate, as shown for web 5. In the exemplary embodiments, the webs are connected on their wide side to the base plate, but they can also be arranged in an upright position.

Die Stege nach Fig. 2 sind mit Materialstreifen 3 aus einem hitzebeständigen Panzerwerkstoff bewehrt. Der Panzerwerkstoff kann auf die Stege aufgeschweisst oder in anderer Weise mit den Stegen verbunden sein. Dabei können auch die Stegflanken 7 und 8 vollständig oder teilweise mit Panzerwerkstoff versehen sein. Die Stege verlaufen in Förderrichtung der abzusiebenden Materials.2 are reinforced with material strips 3 made of a heat-resistant armor material. The armor material can be welded onto the webs or connected to the webs in some other way. The web flanks 7 and 8 can also be provided completely or partially with armor material. The webs run in the conveying direction of the material to be screened.

Bedingt durch die aufgeschweissten Materialstreifen bzw. durch die Stege liegen die Sieblöcher 2 in der Grundplatte 1 unterhalb der Oberkante der Siebplatte. Sie werden daher durch das zu behandelnde Material, insbesondere durch grosse und schwere Materialbestandteile, weniger stark beansprucht. Gleichzeitig wird die Siebleistung verbessert.Due to the welded-on strips of material or the webs, the screen holes 2 are located in the base plate 1 below the upper channel te of the sieve plate. They are therefore less stressed by the material to be treated, especially by large and heavy material components. At the same time, the sieving performance is improved.

Wie bei Fig. 2 und 4 angedeutet, kann die Siebplatte im Bereich der Sieblöcher zusätzlich mit Panzerwerkstoff aufgepanzert sein. Die Höhe der Aufpanzerung 6 kann gleich oder kleiner sein als die Höhe der gepanzerten Streifen oder Leisten. Die Form der Aufpanzerung kann von dem dargestellten Ausführungsbeispiel nach Fig. 4 abweichen. Beispielsweise können auf der Fläche der Sieblochung einzelne Raupen aus Panzerwerkstoff in Längs- oder Querrichtung aufgeschweisst werden.As indicated in FIGS. 2 and 4, the screen plate in the area of the screen holes can additionally be armored with armor material. The height of the armor 6 can be equal to or less than the height of the armored strips or strips. The shape of the armor can differ from the exemplary embodiment shown in FIG. 4. For example, individual beads made of armored material can be welded on the surface of the perforated screen in the longitudinal or transverse direction.

Bei einem aus einer Anzahl von Siebplatten bestehenden Siebbelag (nicht dargestellt) sind die Siebplatten reihenweise hintereinander (in Förderrichtung) und nebeneinander (quer zur Förderrichtung) angeordnet. Die Querreihen der Siebplatten können hierbei versetzt zueinander eingebaut bzw. so hergestellt werden, dass sich in Förderrichtung gesehen die Streifen mit der Sieblochung mit gepanzerten Streifen oder Leisten abwechseln (schachbrettartige Versetzung der Lochstreifen bzw. der gepanzerten Streifen).In the case of a screen covering (not shown) consisting of a number of screen plates, the screen plates are arranged in rows one behind the other (in the conveying direction) and next to one another (transversely to the conveying direction). The transverse rows of the sieve plates can be installed offset to one another or manufactured in such a way that the strips alternate with the perforations in the conveying direction with armored strips or strips (checkerboard-like offset of the perforated strips or the armored strips).

Claims (9)

1. Screen plate of steel or cast iron for hot loose material which causes intense wear, with a support of heat-resistant armour, characterized in that the screen plate is cast, that the heat-resistant armour is arranged in the form of strips or bands (3) running in the conveying direction on the screen plate and that the screen perforation (2) is arranged sunken between the strips or bands (3).
2. Screen plate according to Claim 1, characterized in that the screen plate consists of a cast base plate (1), on which strips (3) of material consisting of heat-resistant armour are arranged.
3. Screen plate according to Claim 2, characterized in that the base plate (1) has cross-pieces (4, 5), on which strips (3) of material are arranged.
4. Screen plate according to Claim 2 or 3, characterized in that the strips (3) of material and/ or cross-pieces (5) are welded on.
5. Screen plate according to Claim 3, characterized in that the cross-piece flanks are constructed so as to be inclined or curved toward the centre of the cross-piece and are provided partially or fully with strips (7, 8) or material.
6. Screen plate according to Claim 1, characterized in that the screen perforation (2) consists of slots (2) which are arranged in rows and at angle of approximately 45° to the conveying direction.
7. Screen plate according to Claim 6, characterized in that successive slots (2) are staggered with respect to each other in their longitudinal direction in each case by approximately 90°.
8. Screen plate according to Claim 1, characterized in that the base plate (1) is additionally armoured between the strips or bands (3) in the regions of the screen perforation (2), the height of the armouring (6) being equal to or less than the height of the strips or bands (3).
9. Screen covering with cast screen plates according to Claim 1, characterized in that successive screen plates in the conveying direction are staggered with respect to each other transversely to the conveying direction by the width of the screen perforation (2) or of the strips or bands (3).
EP81105234A 1980-10-29 1981-07-06 Screen plate Expired EP0050709B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105234T ATE13020T1 (en) 1980-10-29 1981-07-06 SCREEN PLATE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3040710 1980-10-29
DE19803040710 DE3040710A1 (en) 1980-10-29 1980-10-29 Poured sieve plate

Publications (2)

Publication Number Publication Date
EP0050709A1 EP0050709A1 (en) 1982-05-05
EP0050709B1 true EP0050709B1 (en) 1985-05-02

Family

ID=6115441

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Application Number Title Priority Date Filing Date
EP81105234A Expired EP0050709B1 (en) 1980-10-29 1981-07-06 Screen plate

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EP (1) EP0050709B1 (en)
AT (1) ATE13020T1 (en)
DE (2) DE3040710A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383055B (en) * 1983-08-18 1987-05-11 Hutter & Schrantz Ag SCREEN BASE FOR VIBRATING SCREENING MACHINES
DE3703221A1 (en) * 1987-02-04 1988-08-18 Wahl Verschleiss Tech METHOD FOR PRODUCING WEAR CLAIMS, A VARIETY OF SCREENS CONTAINING SCREEN OPENINGS
FR2634148B3 (en) * 1988-07-13 1990-05-11 Lorfonte Sa GRILLED MATERIALS SCREENING CANVAS, ESPECIALLY COKE
SE8802999L (en) * 1988-08-26 1990-02-27 Panel International Ltd FILTER ELEMENT
DE19719482C2 (en) * 1997-05-07 2000-05-11 Voith Sulzer Stoffaufbereitung Sieve for fiber suspensions and process for its manufacture
EP2431128A1 (en) 2010-09-17 2012-03-21 Inflotek B.V. Method for producing a stable filter or sieve insert

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE671593C (en) * 1937-09-15 1939-02-10 Bernhard Ungerland Transport sieve for sieving and conveying bulk goods
FR1191721A (en) * 1957-02-20 1959-10-21 Rosenthal Isolatoren Gmbh Perforated screening bottom, in particular for screening machines and centrifugal machines, and its manufacturing process
DE1230292B (en) * 1966-03-11 1966-12-08 Haver & Boecker Sieve floors
DE2318646C2 (en) * 1973-04-13 1974-08-01 Verschleiss-Technik Dr.-Ing. Hans Wahl, 7304 Ruit Process for the production of sieves from pre-punched base plates
DE2532379C3 (en) * 1975-07-19 1981-09-10 Gustav Schade Maschinenfabrik Gmbh & Co, 4600 Dortmund Sieve plate
DE2532375C3 (en) * 1975-07-19 1981-11-12 Gustav Schade Maschinenfabrik Gmbh & Co, 4600 Dortmund Sieve plate
AU501192B2 (en) * 1975-09-19 1979-06-14 Mason & Cox Proprietary Limited Improved screen plate

Also Published As

Publication number Publication date
ATE13020T1 (en) 1985-05-15
EP0050709A1 (en) 1982-05-05
DE3040710A1 (en) 1982-05-27
DE3170271D1 (en) 1985-06-05

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