DE3220916A1 - Roller press for compacting pulverulent or fine-crystalline materials - Google Patents

Roller press for compacting pulverulent or fine-crystalline materials

Info

Publication number
DE3220916A1
DE3220916A1 DE19823220916 DE3220916A DE3220916A1 DE 3220916 A1 DE3220916 A1 DE 3220916A1 DE 19823220916 DE19823220916 DE 19823220916 DE 3220916 A DE3220916 A DE 3220916A DE 3220916 A1 DE3220916 A1 DE 3220916A1
Authority
DE
Germany
Prior art keywords
roller press
roller
fine
housing
goods
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Withdrawn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
DE19823220916
Other languages
German (de)
Inventor
Karl 5632 Wermelskirchen Warnecke
Hermann 5630 Remscheid Wiesner
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.)
Alexanderwerk AG
Original Assignee
Alexanderwerk 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 Alexanderwerk AG filed Critical Alexanderwerk AG
Priority to DE19823220916 priority Critical patent/DE3220916A1/en
Publication of DE3220916A1 publication Critical patent/DE3220916A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/56—Compression moulding under special conditions, e.g. vacuum
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/35—Extrusion nozzles or dies with rollers
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
    • B29C48/525—Conical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0005—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for briquetting presses
    • B30B15/0017—Deairing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/56—Compression moulding under special conditions, e.g. vacuum
    • B29C2043/561—Compression moulding under special conditions, e.g. vacuum under vacuum conditions
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The invention relates to a roller press for compacting pulverulent or fine-crystalline materials. The materials are delivered by a conveyor screw into the roller nip of the roller press. Immediately before the roller nip, the delivery channel of the delivery section is surrounded by a porous sleeve of sintered material, which sleeve forms the inner shell of a chamber which is under vacuum. The air released by the increasing compaction of the material being conveyed is extracted via the sleeve, so that even pulverulent or fine-crystalline material, which can otherwise hardly be processed, can be processed at a high degree of compaction.

Description

Walzenpresse zur Verdichtung pulverförmiger Roller press for compacting powdery

oder feinkristalliner Güter Die Erfindung betrifft eine Walzenpresse zur Verdichtung pulverförmiger oder feinkristalliner Güter mit dem Walzenspalt unmittelbar vorgeordnetem Schneckenförderer. or finely crystalline goods The invention relates to a roller press for compacting powdery or finely crystalline goods with the roller gap directly upstream screw conveyor.

Die Verdichtung'von pulverförmigen oder feinkristallinen Gütern dient dazu, deren Handhabung zu ermöglichen. Beim Verdichten strebt man zur Erzielung einer hohen Durchsatzleistung einen hohen Verdichtungsgrad an. Es hat sich gezeigt, daß der Grad der möglichen Verdichtung wesentlich von der Art des Gutes abhängt. Ohne Vorverdichtung lassen sich mit einer bekannten Walzenpresse Güter unter 10,u und/oder unter einem Schüttgewicht in der Größenordnung 3 von 0,5 kg/dm nicht oder nur unzureichend verdichten.The compression of powdery or finely crystalline goods is used to enable their handling. When compressing one strives to achieve a high degree of compression to a high throughput. It has shown, that the degree of possible compression depends essentially on the type of property. Without pre-compression, goods under 10, u and / or below a bulk density in the order of 3 of 0.5 kg / dm not or only insufficiently compact.

Bei einem hohen Luftanteil des Schüttgutes tritt nämlich im Bereich der Walzen unkontrolliert Luft aus, die das zu verdichtende Gut mitreißt.If there is a high proportion of air in the bulk material, it occurs in the area the rollers exhaust air in an uncontrolled manner, which entrains the material to be compacted.

Der Erfindung liegt die Aufgabe zugrunde, eine Walzenpresse zu schaffen, mit der auch sehr feinkörnige Güter geringen Schüttgewichtes ohne Vorverdichtung stark verdichtet werden können.The invention is based on the object of creating a roller press, with the even very fine-grained goods of low bulk weight without pre-compression can be strongly compressed.

Diese Aufgabe wird bei einer Walzenpresse der eingangs genannten Art dadurch gelöst, daß in der Wandung d Schneckengehäuses zwischen dem Walzenspalt und der Güteraufgabe eine durch einen porösen Körper abgedeckte Absaugöffnung für die vor dem Walzenspalt durch Verdichtung des Gutes frei gesetzte Luft vorgesehen ist.This task is performed in a roller press of the type mentioned at the beginning solved in that in the wall d screw housing between the nip and the goods feed a suction opening covered by a porous body for the air released by compression of the material in front of the roller gap is provided is.

Der poröse Körper besteht vorzugsweise aus Sintermaterial. Er sollte sich mindestens über den letzten Abschnitt der Schnecke erstrecken. Gute Ergebnisse wurden mit einem porösen Körper in Form einer die Innenwand des Gehäuses bildenden Hülse erzielt, die zusammen mit dem Außenmantel des Schneckengehäuses eine Unterdruckkammer bildet.The porous body is preferably made of sintered material. He should extend at least over the last section of the screw. Good results were made with a porous body in the form of an inner wall of the housing Achieved sleeve, which together with the outer jacket of the screw housing a vacuum chamber forms.

Bei der erfindungsgemäßen Walzenpresse wird die in den Gütern enthaltene Luft vor dem Walzenspalt abgesogen, so daß es nicht länger zu einem unkontrollierten Luftaustritt im Bereich der Walzen kommen kann. Das Absaugen der Luft über die poröse Hülse hat den weiteren Vorteil, daß die Förderung des Gutes durch die Schnecke unterstützt wird. Insbesondere, wenn die Güterzugabe aus einem Einfülltrichter besteht, wird eine Hohlraumbildung im Trichter durch den Sog unterbunden. Versuche mit der erfindungsgemäßen Walzenpresse haben ergeben, daß auch nach längerem Betrieb sich die aus Sintermaterial bestehende poröse Hülse nicht mit dem zu verdichtenden Gut zusetzt. Selbst feinkörnige Schüttgüter mit einer Korngröße weit unter 10 u konnten um den Faktor 3 verdichtet werden.In the case of the roller press according to the invention, the is contained in the goods Air is sucked in front of the nip so that it is no longer an uncontrolled one Air leakage in the area of the rollers can occur. Sucking the air over the porous The sleeve has the further advantage that the conveying of the goods is supported by the screw will. In particular, if the addition of goods consists of a feed hopper the suction prevented the formation of cavities in the funnel. Experiments with the invention Roller presses have shown that even after prolonged operation, they are made of sintered material existing porous sleeve does not clog with the material to be compacted. Even fine-grained ones Bulky goods with a grain size far below 10 u could be compressed by a factor of 3 will.

Im folgenden wird die Erfindung anhand einer ein Ausführungsbeispiel im Axialschnitt darstellenden Zeichnung näher erläutert.In the following the invention is based on an exemplary embodiment explained in more detail in the axial section depicting drawing.

Die Walzenpresse besteht aus zwei Zylinderwalzen 1, 2 und einem den Walzen vorgeordneten Schneckenförderer 3. Aus einem auf dem Gehäuse 4 des Schneckenförderers aufgesetzten Fülltrichter 5 gelangt das zu verdichtende Gut über eine Güterzugabe 6 in den vom Gehäuse gebildeten Kanal 7, in dem mindestens eine angetrieEneunS einen in Förderrichtung steigenden Schneckengang aufweisende Schnecke 8 angeordnet ist. Das Ende des Gehäuses 4 schließt mit an den Walzenoberflächen anliegenden Leisten 9, 10 und stirnseitigen Abdeckblechen 11 dicht an die Walzen 1, 2 an.The roller press consists of two cylinder rollers 1, 2 and one the Rollers upstream screw conveyor 3. From one on the housing 4 of the screw conveyor When the hopper 5 is attached, the material to be compacted arrives via an addition of goods 6 into the channel 7 formed by the housing, in which at least one driven nine one In the conveying direction increasing screw flight having screw 8 is arranged. The end of the housing 4 closes with strips resting on the roller surfaces 9, 10 and front cover plates 11 close to the rollers 1, 2.

Der in Förderrichtung letzte Abschnitt der Förderschnecke 8 ist von einer porösen Hülse 12 aus Sintermaterial, beispielsweise aus gesinterter Kupferlegierung, rc5en, die ihrerseits von dem als Außenmantel wirkenden Gehäuse 4 mit radialem Abstand umgeben ist. Die auf diese Art und Weise gebildete ringförmige Kammer 14 weist eine öffnung 15 im Gehäuse 4 für den Anschluß einer Pumpe zur Erzeugung von Unterdruck in der Kammer 14 auf.The last section of the screw conveyor 8 in the conveying direction is of a porous sleeve 12 made of sintered material, for example made of sintered copper alloy, rc5en, which in turn are radially spaced from the housing 4, which acts as an outer jacket is surrounded. The annular chamber 14 formed in this way has a Opening 15 in the housing 4 for the connection of a pump for generating negative pressure in chamber 14.

Im Betrieb wird die durch zunehmende Kompression vor den Walzen 1, 2 frei gesetzte Luft über die poröse Hülse 12 abgesaugt. Ein undefinierter Luftaustritt und damit Mitreißen von Gut wird somit wirksam verhindert. Das ständige Absaugen der Luft unmittelbar vor den Walzen schafft die Voraussetzung für die angestrebte hohe Verdichtung des Gutes im Walzspalt. Deshalb lassen sich mit der erfindungsgemäßen Walzenpresse ohne den Einsatz von zustzlicen Vorverdichtungsmaschinen auch pulverförmige oder feinkristalline Güter mit sehr kleinem Schüttgewicht mit hoher Durchsatzleistung verdichten.During operation, the increasing compression in front of the rollers 1, 2 released air is sucked off through the porous sleeve 12. An undefined air outlet and thus entrainment of goods is effectively prevented. The constant suction the air immediately in front of the rollers creates the conditions for the desired high compaction of the material in the roll gap. Therefore, with the invention Roller press also powdery without the use of additional pre-compaction machines or finely crystalline goods with a very low bulk density and high throughput condense.

Claims (4)

Ansprüche: Walzenpresse zur Verdichtung pulverförmiger oder feinkristalliner Güter mit dem Walzenspalt unmittelbar vorgeordnetem Schneckenförderer, dadurch gekennzeichnet, daß in der Wandung des Schneckengehäuses zwischen dem Walzenspalt und der Güteraufgabe (6) eine durch einen porösen Körper (12) abgedeckte Absaugöffnung (15) für die vor dem Walzenspalt durch Verdichtung des Gutes frei gesetzte Luft vorgesehen ist. Demands: Roller press for compaction of powdery or fine crystalline Goods with the screw conveyor immediately upstream of the roller gap, characterized in that that in the wall of the screw housing between the roller gap and the goods feed (6) a suction opening (15) covered by a porous body (12) for the before the nip is provided by the compression of the material released air. 2. Walzenpresse nach Anspruch 1, dadurch gekennzeichnet, daß der poröse Körper (12) aus Sintermaterial besteht. 2. Roll press according to claim 1, characterized in that the porous body (12) made of sintered material. 3. Walzenpresse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich der poröse Körper (12) mindestens über den letzten Abschnitt der Schnecke (8) erstreckt. 3. Roll press according to claim 1 or 2, characterized in that the porous body (12) extends at least over the last section of the screw (8) extends. 4. Walzenpresse nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der poröse Körper (12) eine die Innenwand des Gehäuses (4) bildende Hülse ist, diG zusammen mit dem Außenmantel des Gehäuses eine Unterdruckkammer (14) bildet. 4. Roller press according to one of claims 1 to 3, characterized in that that the porous body (12) is a sleeve forming the inner wall of the housing (4), diG forms a vacuum chamber (14) together with the outer casing of the housing.
DE19823220916 1982-06-03 1982-06-03 Roller press for compacting pulverulent or fine-crystalline materials Withdrawn DE3220916A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823220916 DE3220916A1 (en) 1982-06-03 1982-06-03 Roller press for compacting pulverulent or fine-crystalline materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823220916 DE3220916A1 (en) 1982-06-03 1982-06-03 Roller press for compacting pulverulent or fine-crystalline materials

Publications (1)

Publication Number Publication Date
DE3220916A1 true DE3220916A1 (en) 1983-12-08

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3733500A1 (en) * 1987-10-03 1989-04-13 Alexanderwerk Ag METHOD AND ROLLING PRESS FOR THE PRODUCTION OF PIECE OF MATERIAL FROM FINE-PIECE SMOKE GAS PLASTER
JPH01299640A (en) * 1988-05-30 1989-12-04 Mitsubishi Kasei Corp Deaerator for particulate matter
EP0359285A2 (en) * 1988-09-16 1990-03-21 Franz Haimer Apparatus for briquetting stalks,in particular straw
WO1991004150A1 (en) * 1989-09-15 1991-04-04 Franz Haimer Device for making vegetable matter, especially stalks, into briquettes
WO1991011320A1 (en) * 1990-02-05 1991-08-08 Maschinenfabrik Köppern Gmbh & Co. Kg Roll press or mill
EP0530482A1 (en) * 1991-08-08 1993-03-10 Ernst Winter & Sohn (Gmbh & Co.) Process for preparing sintered metallic articles and articles obtained thereby, in particular press tools
DE202007011767U1 (en) 2007-08-23 2009-01-02 Coperion Werner & Pfleiderer Gmbh & Co. Kg Fütter-screw machine
US7607817B2 (en) 2007-04-07 2009-10-27 Coperion Gmbh Extruder having a set back gas-permeable wall portion
WO2012079955A1 (en) 2010-12-17 2012-06-21 Unilever Nv Process of compacting a microporous fat powder and compacted fat powder so obtained
WO2014090474A1 (en) * 2012-12-10 2014-06-19 Maschinenfabrik Köppern Gmbh & Co. Kg Roll-type press
US9661864B2 (en) 2005-02-17 2017-05-30 Unilever Bcs Us, Inc. Process for the preparation of a spreadable dispersion
EP2810757B1 (en) 2012-04-27 2017-06-21 The Japan Steel Works, Ltd. Device and method for screw-type supply of fine powder raw material
US9924730B2 (en) 2010-06-22 2018-03-27 Unilever Bcs Us, Inc. Edible fat powders
US11278038B2 (en) 2003-07-17 2022-03-22 Upfield Europe B.V. Process for the preparation of an edible dispersion comprising oil and structuring agent

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3733500A1 (en) * 1987-10-03 1989-04-13 Alexanderwerk Ag METHOD AND ROLLING PRESS FOR THE PRODUCTION OF PIECE OF MATERIAL FROM FINE-PIECE SMOKE GAS PLASTER
JPH0747120B2 (en) * 1988-05-30 1995-05-24 三菱化学株式会社 Deaeration device for powder
JPH01299640A (en) * 1988-05-30 1989-12-04 Mitsubishi Kasei Corp Deaerator for particulate matter
EP0359285A3 (en) * 1988-09-16 1990-11-22 Franz Haimer Apparatus for briquetting plant material, in particular stalks and the like
EP0359285A2 (en) * 1988-09-16 1990-03-21 Franz Haimer Apparatus for briquetting stalks,in particular straw
WO1991004150A1 (en) * 1989-09-15 1991-04-04 Franz Haimer Device for making vegetable matter, especially stalks, into briquettes
US5302102A (en) * 1989-09-15 1994-04-12 Franz Haimer Equipment for briqueting vegetal material in particular stalk-plant materials
WO1991011320A1 (en) * 1990-02-05 1991-08-08 Maschinenfabrik Köppern Gmbh & Co. Kg Roll press or mill
US5271319A (en) * 1990-02-05 1993-12-21 Maschinenfabrik Koppern Gmbh & Co. Kg Roll press with deaeration apparatus
EP0530482A1 (en) * 1991-08-08 1993-03-10 Ernst Winter & Sohn (Gmbh & Co.) Process for preparing sintered metallic articles and articles obtained thereby, in particular press tools
US11278038B2 (en) 2003-07-17 2022-03-22 Upfield Europe B.V. Process for the preparation of an edible dispersion comprising oil and structuring agent
US9661864B2 (en) 2005-02-17 2017-05-30 Unilever Bcs Us, Inc. Process for the preparation of a spreadable dispersion
US7607817B2 (en) 2007-04-07 2009-10-27 Coperion Gmbh Extruder having a set back gas-permeable wall portion
DE202007011767U1 (en) 2007-08-23 2009-01-02 Coperion Werner & Pfleiderer Gmbh & Co. Kg Fütter-screw machine
US9924730B2 (en) 2010-06-22 2018-03-27 Unilever Bcs Us, Inc. Edible fat powders
US10219523B2 (en) 2010-12-17 2019-03-05 Upfield Us Inc. Process of compacting a microporous fat powder and compacted fat powder so obtained
US11071307B2 (en) 2010-12-17 2021-07-27 Upfield Europe B.V. Process of compacting a microporous fat powder and compacted powder so obtained
WO2012079955A1 (en) 2010-12-17 2012-06-21 Unilever Nv Process of compacting a microporous fat powder and compacted fat powder so obtained
EP2810757B1 (en) 2012-04-27 2017-06-21 The Japan Steel Works, Ltd. Device and method for screw-type supply of fine powder raw material
WO2014090474A1 (en) * 2012-12-10 2014-06-19 Maschinenfabrik Köppern Gmbh & Co. Kg Roll-type press

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