EP0289647B1 - Disc kneader - Google Patents

Disc kneader Download PDF

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Publication number
EP0289647B1
EP0289647B1 EP87112101A EP87112101A EP0289647B1 EP 0289647 B1 EP0289647 B1 EP 0289647B1 EP 87112101 A EP87112101 A EP 87112101A EP 87112101 A EP87112101 A EP 87112101A EP 0289647 B1 EP0289647 B1 EP 0289647B1
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EP
European Patent Office
Prior art keywords
disc
kneading
product
scraper
elements
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.)
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EP87112101A
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German (de)
French (fr)
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EP0289647A1 (en
Inventor
Heinz List
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List AG
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List AG
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Priority to AT87112101T priority Critical patent/ATE67427T1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/008—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/707—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms the paddles co-operating, e.g. intermeshing, with elements on the receptacle wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F35/95—Heating or cooling systems using heated or cooled stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/90—Heating or cooling systems
    • B01F2035/99—Heating

Definitions

  • the invention relates to a mixer kneader for the mechanical and thermal treatment of products in a liquid, pasty and / or powdery state with a heatable cylindrical housing and a stirring shaft rotating coaxially therein, with disc elements placed at right angles, which cooperate with kneading counter elements fastened in the housing between the disc planes. as described in claim 1.
  • the present invention avoids the disadvantages by dividing the scraping of the heated pane surfaces over two scraping edges.
  • the resulting inclined position of the hook-shaped kneading counter element results on the one hand in a more scissor-like scraping effect and in a significantly larger opening inside the hook for the transport of the product.
  • the mixing and kneading effect of the principle is significantly improved by dividing the product into two different streams by means of the two scraping edges and then mixing them together again.
  • FIGS. 2 and 3 show an embodiment of the patent subject for batch operation. Part of the housing has been cut open to make the agitator shaft easier to identify.
  • the cylindrical housing 1 is provided on both sides with the end caps 2 and 3, in which the glands 4 and 5 or the lanterns 6 and 7 are fastened, in which the bearings 8 and 9 for the agitator shaft are arranged. All housing parts are provided with the heating jacket 10. The connecting pieces for the heating are designated 11 and 12.
  • the housing is provided with the filler neck 13, the emptying neck 14, and the gas discharge or gas supply neck 15.
  • the agitator shaft 16 rotates, which is supported with shaft journals in the bearings 8 and 9.
  • the disk elements 17 are fastened on the shaft 16, on each of which the approximately axially parallel or slightly inclined kneading bars 18 are fastened on the outer diameter.
  • the kneading counter-elements 20 and 21 are fastened in the housing between two disk levels of the stirrer.
  • Each of these kneading counter elements consists of a support neck 22 which is fastened in a flange 23.
  • An arm 24, which extends in an approximately axially parallel direction to the disk surface, is supported on this support neck, the distance from the housing wall being selected such that a kneading gap 25 is created, through which the kneading vanes 18 on the disk elements 17 produce the product press through.
  • the radial scraper 26 for cleaning the pane surfaces is in turn supported on this arm 24.
  • This radial scraper for the disc surfaces has the 2 scraper edges 27 and 28 and finally merges into the scraper 29 arranged at an angle to the shaft surface.
  • the scraping edge 28 takes over the cleaning of the inner part of the pane surface, from which it transports the material away from the pane surface in the axial direction through the inclined position shown, which essentially follows the arrangement of the shaft scraper 29.
  • the scraper edge 27 cleans the remaining part of the disks, whereby advantageously both the arm 24 of the kneading counter-elements and the radial arm 26 are arranged so obliquely with respect to the longitudinal section through the axis that the product there also essentially axially away from the disk surfaces and into the Space is transported between the disk surfaces or is also pressed into the kneading gap 25 by means of a radial transport component.
  • the working principle is based on the fact that the filled product is gripped by the disk surfaces 17 and the kneading blades 18 fastened thereon and transported against the kneading counter elements 21, 22.
  • the product scraped from the stirrer surfaces by the kneading counter-elements is transported on the one hand against the opposite disc surface, where it mixes with the product entrained by it, but on the other hand pressed by the kneading blade 18 into the kneading gap 25 and subjected to strong shear forces there.
  • the division of the scraper into 2 scraping edges leads to a division of the product into 2 product streams, which are mixed together again between the discs.
  • this effect is further intensified by the fact that the inclined position of the radial scraper arm 26 increasingly transports material into the kneading gap 25.
  • the inclination of the radial scraper 26 results in very large passage areas of the product within the kneading counter elements and thus avoids the build-up of certain structurally viscous products on the kneading counter elements.
  • FIG. 4 shows the cross section of the radial scraper arm 26 with the scraper edge 27 and its position in relation to the disk element 17.
  • two kneading counter elements are arranged between two disc levels, each of which cleans one of the opposing disc surfaces. More kneading counter elements can also be arranged. However, it is important to ensure that the position of the kneading bars on the disc elements relative to the kneading counter-elements is selected so that the most uniform possible power requirement is guaranteed.
  • FIG. 5 shows an example in which the first scraping edge 31 is comb-shaped, so that first strips are removed from the product surface, while the scraping edge 32 is still in shape on the surface of the pane scrapes from product adhering to rings.
  • Another simple way of dividing the scraping arm is to first remove only the upper part of the product layer with the first scraper and only with the second scraper to remove the rest of the product layer.
  • FIGS. 6 and 7 show a distributor 34, which is likewise fastened in the housing between two disc planes and serves to distribute the product on both opposite disc surfaces. This makes it possible to compress the product, which intensifies the kneading work of the kneading counter-elements for certain products.
  • FIGS. 6 and 8 show an approximately T-shaped stirring finger 35 which can be used to intensify the material movement in the cross-section between the disk surfaces which is not covered by the kneading counter-elements.
  • these stirring fingers can also be given other practical training.
  • the principle of the invention also allows the axial exchange of material in the disk kneader to be produced in a simple manner by ensuring that the kneading vanes 18 fastened on the disks 17 are axially transported so that the product is transported axially.
  • the kneading blades 18 incline a transport effect on the product, in the present case the material is guided from the outside into the center of the machine and there with the the other side can exchange product.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

Kneader-mixers for mechanical and thermal treatment of products in different state forms, comprising a heatable cylindrical casing and a kneader shaft with heatable disk elements revolving therein and on which are arranged kneading blades scraping the inner wall of the casing. During mixing, these stirring elements cooperate with the hook-like kneading counterelments cleaning the stirrer surfaces and fixed in the casing. In each counterelement an arm forms a kneading gap with the casing wall, while second and third arms clean the disks and shaft. Each radial scraper for each disk element has at least two separate scraping edges, which subdivide the product into two product flows and through the inclined position of the kneading counterelements the scraped product acquires a powerful axial and radial transport component.

Description

Die Erfindung betrifft einen Mischkneter für die mechanische und thermische Behandlung von Produkten in flüssigem, pastösen und/oder pulverförmigen Zustand mit einem beheizbaren zylindrischen Gehäuse und einer darin koaxial rotierenden Rührwelle, mit rechtwinklig aufgesetzten Scheibenelementen, die mit im Gehäuse zwischen den Scheibenebenen befestigten Knetgegenelementen zusammenarbeiten, wie dies im Patentanspruch 1 näher beschrieben ist.The invention relates to a mixer kneader for the mechanical and thermal treatment of products in a liquid, pasty and / or powdery state with a heatable cylindrical housing and a stirring shaft rotating coaxially therein, with disc elements placed at right angles, which cooperate with kneading counter elements fastened in the housing between the disc planes. as described in claim 1.

Mischkneter der ähnlichen Art sind z.B. aus der CH - A-583061 bekannt. Bei den bekannten Ausführungen sind die hakenförmigen Knetgegenelemente praktisch in den Längsschnittebenen angeordnet, die durch die Gehäuseachse hindurchgehen. Bei dieser Anordnung ist der für den Durchgang des Produkts offene Querschnitt im Bereich der hakenförmigen Knetgegenelemente sehr begrenzt. Die Praxis hat gezeigt, dass bei bestimmten strukturviskosen Produkten, wie z.B. Zellulosederivaten oder alkalischen Alkoholaten sich auf den Gegenhaken Material aufbaut. Dieses Aufbauen kann zur Bildung von torusartigen Gebilden führen, die einen grossen Teil des Querschnitts der Maschine für den Transport von Produkt und eventuellen sich bildenden Gasen stark einengen. Ein weiterer Nachteil dieser Anordnung ergibt sich für die Aufgabe Krusten von den beheizten Flächen zu entfernen. Bei der oben geschilderten Hakenanordnung in der Längsschnittebene des Gehäuses werden die Schabkanten der hakenförmigen Knetgegenelemente direkt senkrecht und gleichzeitig beansprucht. Dies führt zu einem hohen Kraftaufwand und raschen Verschleiss der Schabkanten.Mixing kneaders of the similar type are known, for example, from CH - A-583061. In the known designs, the hook-shaped kneading counter elements are practically arranged in the longitudinal sectional planes which pass through the housing axis. With this arrangement, the cross section open to the passage of the product is very limited in the area of the hook-shaped kneading counter elements. Practice has shown that with certain pseudoplastic products, such as cellulose derivatives or alkaline alcoholates, material builds up on the counter hook. This build-up can lead to the formation of toroidal structures, which severely constrict a large part of the cross-section of the machine for the transport of product and any gases that form. Another disadvantage of this arrangement arises for the task of removing crusts from the heated surfaces. In the case of the hook arrangement described above in the longitudinal section plane of the housing, the scraping edges of the hook-shaped kneading counter-elements are stressed directly vertically and simultaneously. This leads to a high effort and rapid wear of the scraping edges.

Die vorliegende Erfindung vermeidet die Nachteile durch Aufteilung des Abschabens der beheizten Scheibenflächen auf zwei Schabkanten. Zusätzlich ergibt die daraus resultierende Schrägstellung des hakenförmigen Knetgegenelements einerseits eine mehr scherenartige Schabwirkung und eine wesentlich grössere Oeffnung innerhalb des Hakens für den Transport des Produktes. Andererseits wird auch die Misch- und Knetwirkung des Prinzips dadurch bedeutend verbessert, dass das Produkt durch die zwei Schabkanten in zwei verschiedene Ströme aufgeteilt und anschliessend wieder zusammengemischt wird.The present invention avoids the disadvantages by dividing the scraping of the heated pane surfaces over two scraping edges. In addition, the resulting inclined position of the hook-shaped kneading counter element results on the one hand in a more scissor-like scraping effect and in a significantly larger opening inside the hook for the transport of the product. On the other hand, the mixing and kneading effect of the principle is significantly improved by dividing the product into two different streams by means of the two scraping edges and then mixing them together again.

Der Erfindungsgegenstand ist in den beiliegenden Skizzen dargestellt. Es zeigen:

Fig. 1
Aufsicht auf einen Scheibenkneter mit rotierenden Scheiben, teilweise in der Längsachse geschnitten.
Fig. 2
Querschnitt durch den Scheibenkneter Fig. 1 nach Linie II-II der Fig. 1.
Fig. 3
Teil eines Längsschnitts zu Fig. 2.
Fig. 4
Detailschnitt durch den Schaberarm für die Reinigung der Scheibenfläche nach Linie III-III der Fig. 3.
Fig. 5
Darstellung eines hakenförmigen Knetgegenelementes mit kammartiger Ausführung der ersten Schneidkante.
Fig. 6
Querschnitt eines Scheibenkneters wie Fig. 2, jedoch mit einem keilförmigen Verteiler für den Produktraum auf zwei gegenüberliegende Scheibenflächen, sowie einem zusätzlichen Knetflügel auf der Rührwelle.
Fig. 7
Teil eines Längsschnitts nach Linie IV-IV der Fig. 6.
Fig. 8
Teil eines Längsschnitts nach Linie V-V der Fig. 6.
Fig. 9
Abwicklung für einen absatzweise arbeitenden Scheibenkneter.
The subject of the invention is shown in the accompanying sketches. Show it:
Fig. 1
Top view of a disc kneader with rotating discs, partially cut in the longitudinal axis.
Fig. 2
Cross section through the disc kneader Fig. 1 along line II-II of Fig. 1st
Fig. 3
Part of a longitudinal section to FIG. 2.
Fig. 4
Detail section through the scraper arm for cleaning the pane surface according to line III-III of FIG. 3.
Fig. 5
Representation of a hook-shaped kneading counter element with a comb-like design of the first cutting edge.
Fig. 6
Cross-section of a disk kneader as shown in FIG. 2, but with a wedge-shaped distributor for the product space on two opposite disk surfaces, and an additional kneading paddle on the agitator shaft.
Fig. 7
Part of a longitudinal section along line IV-IV of FIG. 6.
Fig. 8
Part of a longitudinal section along line VV in FIG. 6.
Fig. 9
Processing for a batch kneader working.

Die Fig. 1 mit den dazugehörigen Fig. 2 und 3 zeigen eine Ausführung des Patentgegenstandes für einen absatzweisen Betrieb. Ein Teil des Gehauses ist zur besseren Kenntlichmachung der Rührwelle aufgeschnitten.1 with the associated FIGS. 2 and 3 show an embodiment of the patent subject for batch operation. Part of the housing has been cut open to make the agitator shaft easier to identify.

Das zylindrische Gehäuse 1 ist an beiden Seiten mit den Stirndeckeln 2 und 3 versehen, in dem die Stopfbüchsen 4 und 5 bzw. die Laternen 6 und 7 befestigt sind, in denen die Lager 8 und 9 für die Rührwelle angeordnet sind. Alle Gehäuseteile sind mit dem Heizmantel 10 versehen. Die Anschluss-Stutzen für die Heizung sind mit 11 und 12 bezeichnet. Das Gehäuse ist mit dem Füllstutzen 13, dem Entleerungsstutzen 14, sowie dem Gasabzugs- oder Gaszuführungsstutzen 15 versehen. In dem zylindrischen und meist horizontal oder schwach geneigt angeordneten Gehäuse rotiert die Rührwelle 16, die sich mit Wellenzapfen in den Lagern 8 und 9 abstützt. Auf der Welle 16 sind die Scheibenelemente 17 befestigt, auf denen jeweils die annähernd achsparallelen oder schwach geneigten Knetbarren 18 auf dem äusseren Durchmesser befestigt sind. Zwischen jeweils 2 Scheibenebenen des Rührers sind im Gehäuse die Knetgegenelemente 20 und 21 befestigt.The cylindrical housing 1 is provided on both sides with the end caps 2 and 3, in which the glands 4 and 5 or the lanterns 6 and 7 are fastened, in which the bearings 8 and 9 for the agitator shaft are arranged. All housing parts are provided with the heating jacket 10. The connecting pieces for the heating are designated 11 and 12. The housing is provided with the filler neck 13, the emptying neck 14, and the gas discharge or gas supply neck 15. In the cylindrical and usually horizontally or slightly inclined housing, the agitator shaft 16 rotates, which is supported with shaft journals in the bearings 8 and 9. The disk elements 17 are fastened on the shaft 16, on each of which the approximately axially parallel or slightly inclined kneading bars 18 are fastened on the outer diameter. The kneading counter-elements 20 and 21 are fastened in the housing between two disk levels of the stirrer.

Jedes dieser Knetgegenelemente besteht aus einem Traghals 22, der in einem Flansch 23 befestigt ist. Auf diesen Traghals stützt sich zunächst ein Arm 24 ab, der sich in annähernd achsparalleler Richtung bis zur Scheibenfläche hin erstreckt, wobei der Abstand von der Gehäusewand so gewählt ist, dass ein Knetspalt 25 entsteht, durch den die Knetflügel 18 auf den Scheibenelementen 17 das Produkt hindurch pressen.Each of these kneading counter elements consists of a support neck 22 which is fastened in a flange 23. An arm 24, which extends in an approximately axially parallel direction to the disk surface, is supported on this support neck, the distance from the housing wall being selected such that a kneading gap 25 is created, through which the kneading vanes 18 on the disk elements 17 produce the product press through.

Auf diesem Arm 24 ist wiederum der radiale Schaber 26 für die Reinigung der Scheibenflächen abgestützt. Dieser radiale Schaber für die Scheibenflächen besitzt die 2 Schabkanten 27 und 28 und geht schliesslich über in den hierzu winklig angeordneten Schaber 29 für die Wellenoberfläche. Bei dem gezeigten Beispiel übernimmt die Schabkante 28 die Reinigung des inneren Teils der Scheibenfläche, von der er das mitgerissene Produkt durch die gezeigte Schrägstellung,die im wesentlichen der Anordnung des Wellenschabers 29 folgt, das Material von der Scheibenfläche in axialer Richtung abtransportiert. Die Schaberkante 27 reinigt den restlichen Teil der Scheiben, wobei vorteilhafterweise sowohl der Arm 24 der Knetgegenelemente als auch der radiale Arm 26 gegenüber dem Längsschnitt durch die Achse so schräg angeordnet sind, dass auch dort das Produkt im wesentlichen axial von den Scheibenflächen weg und in den Raum zwischen die Scheibenflächen transportiert bzw. auch mittels einer radialen Transportkomponente in den Knetspalt 25 gepresst wird.The radial scraper 26 for cleaning the pane surfaces is in turn supported on this arm 24. This radial scraper for the disc surfaces has the 2 scraper edges 27 and 28 and finally merges into the scraper 29 arranged at an angle to the shaft surface. In the example shown, the scraping edge 28 takes over the cleaning of the inner part of the pane surface, from which it transports the material away from the pane surface in the axial direction through the inclined position shown, which essentially follows the arrangement of the shaft scraper 29. The scraper edge 27 cleans the remaining part of the disks, whereby advantageously both the arm 24 of the kneading counter-elements and the radial arm 26 are arranged so obliquely with respect to the longitudinal section through the axis that the product there also essentially axially away from the disk surfaces and into the Space is transported between the disk surfaces or is also pressed into the kneading gap 25 by means of a radial transport component.

Das Arbeitsprinzip beruht darauf, dass das eingefüllte Produkt von den Scheibenflächen 17 und den darauf befestigten Knetflügeln 18 erfasst und gegen die Knetgegenelemente 21, 22 transportiert wird. Das durch die Knetgegenelemente von den Rührerflächen abgeschabte Produkt wird einerseits gegen die gegenüberliegende Scheibenfläche transportiert, wo es sich mit dem von dieser mitgenommenen Produkt mischt, andererseits aber von dem Knetflügel 18 in den Knetspalt 25 gepresst und dort starken Scherkräften ausgesetzt wird.The working principle is based on the fact that the filled product is gripped by the disk surfaces 17 and the kneading blades 18 fastened thereon and transported against the kneading counter elements 21, 22. The product scraped from the stirrer surfaces by the kneading counter-elements is transported on the one hand against the opposite disc surface, where it mixes with the product entrained by it, but on the other hand pressed by the kneading blade 18 into the kneading gap 25 and subjected to strong shear forces there.

Die Aufteilung des Schabers in 2 Schabkanten führt zu einer Teilung des Produktes in 2 Produktströme, die zwischen den Scheiben wieder zusammengemischt werden. Dadurch wird ein verbesserter Misch- und Kneteffekt erzielt. Zusätzlich wird dieser Effekt dadurch noch intensiviert, dass durch die Schrägstellung der radiale Schaberarm 26 vermehrt Material in den Knetspalt 25 hineintransportiert. Neben dieser Verbesserung des Misch- und Kneteffekts ergibt die Schrägstellung des radialen Schabers 26 sehr grosse Durchgangsflächen des Produktes innerhalb der Knetgegenelemente und vermeidet damit das Aufbauen von bestimmten strukturviskosen Produkten auf den Knetgegenelementen.The division of the scraper into 2 scraping edges leads to a division of the product into 2 product streams, which are mixed together again between the discs. This results in an improved mixing and kneading effect. In addition, this effect is further intensified by the fact that the inclined position of the radial scraper arm 26 increasingly transports material into the kneading gap 25. In addition to this improvement in the mixing and kneading effect, the inclination of the radial scraper 26 results in very large passage areas of the product within the kneading counter elements and thus avoids the build-up of certain structurally viscous products on the kneading counter elements.

Der Detailschnitt Fig. 4 zeigt den Querschnitt des radialen Schaberarms 26 mit der Schabkante 27 und seine Position gegenüber dem Scheibenelement 17.The detail section in FIG. 4 shows the cross section of the radial scraper arm 26 with the scraper edge 27 and its position in relation to the disk element 17.

Normalerweise werden zwischen 2 Scheibenebenen jeweils 2 Knetgegenelemente angeordnet, von denen jedes jeweils eine der sich gegenüberliegenden Scheibenflächen abreinigt. Es können auch mehr Knetgegenelemente angeordnet werden. Jedoch ist hierbei darauf zu achten, dass die Stellung der Knetbarren auf den Scheibenelementen zu den Knetgegenelementen so gewählt wird, dass ein möglichst gleichmässiger Kraftbedarf gewährleistet ist.Normally, two kneading counter elements are arranged between two disc levels, each of which cleans one of the opposing disc surfaces. More kneading counter elements can also be arranged. However, it is important to ensure that the position of the kneading bars on the disc elements relative to the kneading counter-elements is selected so that the most uniform possible power requirement is guaranteed.

Die Aufteilung der Schabkanten kann auch in anderer Form erfolgen, Fig. 5 zeigt ein Beispiel, bei dem die erste Schabkante 31 kammförmig ausgebildet ist, sodass zunächst Streifen von der Produktoberfläche entfernt werden, während die Schabkante 32 den Rest des auf der Scheibenfläche noch in Form von Ringen haftenden Produkts abschabt.The scraping edges can also be divided in a different form, FIG. 5 shows an example in which the first scraping edge 31 is comb-shaped, so that first strips are removed from the product surface, while the scraping edge 32 is still in shape on the surface of the pane scrapes from product adhering to rings.

Eine andere einfache Möglichkeit für die Aufteilung des Abschabarmes besteht darin, mit dem ersten Schaber zunächst nur den oberen Teil der Produktschicht zu entfernen und erst mit dem zweiten Schaber die restliche Produktschicht.Another simple way of dividing the scraping arm is to first remove only the upper part of the product layer with the first scraper and only with the second scraper to remove the rest of the product layer.

Die Figuren 6 und 7 zeigen einen Verteiler 34, der ebenfalls im Gehäuse jeweils zwischen zwei Scheibenebenen befestigt ist und dazu dient, das Produkt auf beide gegenüberliegenden Scheibenflächen zu verteilen. Es kann hierdurch ein Zusammenpressen des Produkts erzielt werden, das für gewisse Produkte die Knetarbeit der Knetgegenelemente intensiviert.FIGS. 6 and 7 show a distributor 34, which is likewise fastened in the housing between two disc planes and serves to distribute the product on both opposite disc surfaces. This makes it possible to compress the product, which intensifies the kneading work of the kneading counter-elements for certain products.

In den Figuren 6 und 8 ist ein annähernd T-förmiger Rührfinger 35 dargestellt, der eingesetzt werden kann, um die Gutsbewegung in dem von den Knetgegenelementen nicht erfassten Querschnitt zwischen den Scheibenflächen zu intensivieren. Diese Rührfinger können neben der erwähnten T-Form auch eine andere zweckmässige Ausbildung erhalten.FIGS. 6 and 8 show an approximately T-shaped stirring finger 35 which can be used to intensify the material movement in the cross-section between the disk surfaces which is not covered by the kneading counter-elements. In addition to the T-shape mentioned, these stirring fingers can also be given other practical training.

Das Erfindungsprinzip erlaubt in einfacher Weise auch den axialen Gutsaustausch in dem Scheibenkneter dadurch herzustellen, dass durch entsprechende Neigung der auf den Scheiben 17 befestigten Knetflügel 18 für einen axialen Transport des Produktes gesorgt wird. Gemäss der Abwicklung der zylindrischen Innenfläche eines Scheibenkneters gemäss Fig. 9 wird bei absatzweise arbeitenden Maschinen durch Schrägstellung der Knetflügel 18 eine Transportwirkung auf das Produkt ausgeübt, wobei im vorliegenden Fall das Material von aussen in die Mitte der Maschine geführt wird und sich dort mit dem von der anderen Seite kommenden Produkt austauschen kann.The principle of the invention also allows the axial exchange of material in the disk kneader to be produced in a simple manner by ensuring that the kneading vanes 18 fastened on the disks 17 are axially transported so that the product is transported axially. According to the development of the cylindrical inner surface of a disk kneader according to FIG. 9, in batchwise working machines, the kneading blades 18 incline a transport effect on the product, in the present case the material is guided from the outside into the center of the machine and there with the the other side can exchange product.

Mit dem gleichen Prinzip der schräggestellten Knetflügel, die für diesen Fall alle eine gleiche Neigung erhalten, wird bei anderen Maschinen ein kontinuierlicher Durchlauf des Produkts von der Aufgabe zum Auslauf erzielt, wobei durch gegensätzlich gezeigte Knetflügel auch ein Rückstrom erzielt werden kann.With the same principle of the inclined kneading blades, which in this case all have the same inclination, a continuous passage of the product from the feed to the outlet is achieved in other machines, whereby a return flow can also be achieved by means of oppositely shown kneading blades.

Für die Durchführung von thermischen Prozessen ist auf die Möglichkeit hinzuweisen, in allen Scheibenapparaten sehr grosse Wärmeübertragungsflächen zu realisieren. Normalerweise sind hierbei nicht nur alle Gehäusewände beheizbar, sondern auch Welle und Scheibenelemente des Rührers, wobei die Zuführung des Heiz- oder Kühlmittels durch die bekannten mechanischen Gleitringköpfe an den Wellenenden erfolgt, wie in Fig. 1 als Teil 40 dargestellt.For the implementation of thermal processes, it should be pointed out the possibility of realizing very large heat transfer surfaces in all disk devices. Normally, not only all the housing walls can be heated here, but also the shaft and disk elements of the stirrer, the heating or cooling medium being supplied by the known mechanical slide ring heads at the shaft ends, as shown in FIG. 1 as part 40.

Claims (7)

  1. Disc kneader for the mechanical and thermal treatment of products in liquid, pasty and/or powdery condition with or without the feed and removal of gases and vapours consisting of a heatable cylindrical housing (1) and a heatable kneading shaft (16) turning coaxially with the axis of the housing, on which, distributed in the axial direction, there are provided several heatable disc elements (17), wherein, in the spaces located between the disc elements, there are located hook-shaped kneading counter elements (20, 21) cleaning the disc elements, that on the disc elements inclined to the axis of the housing at a small distance from the inner wall of the housing, there are provided running beading wings (18) and the kneading counter elements fired in the housing consist of a radial carrier post (22) on which is supported first an arm (24) running substantially in the direction of the length of the housing, which forms, together with the housing wall, a kneading slot (25) through which at least, in each case, part of the kneading wing (18) can be moved, that on the substantially axially parallel part (24) of the kneading counter element a further radial part (26) is supported, which cleans the disc surfaces and which, for its part, bears in turn a scraper (29) lying against the shaft, characterised in that the radial scraper (26) which lies against the disc has, in each case, at least two separated scraper edges (27, 28) arranged at an angle to one another, wherein the scraper edge (28) engaging first in the direction of movement scrapes off only a part of the product adhering to the disc element and the following edge (27) removes the remaining product from the disc and that all of the surfaces of the hook-shaped kneading counter elements are so inclined with respect to the disc surfaces that the product scraped off has an axial and a radial transport component imparted to it and the product is divided by both of the scraper edges into at least two product streams which are then mixed together again.
  2. Mixing kneader according to Patent Claim 1,
    characterised in that the first scraper edge (28) cleans the disc surface bordering on the shaft of product while the subsequent second scraper edge (27) scrapes off the outer surfaces of the disc.
  3. Mixing kneader according to Patent Claim 1,
    characterised in that the first scraper edge (31) is divided up like a comb so that, additionally, ring-shaped product strips separated from one another are scraped off from the disc surfaces and the subsequent second scraper edge (32) engages the remainder of the product.
  4. Mixing kneader according to Patent Claim 1,
    characterised in that the first scraper edge engages only the upper layer of the product adhering to the disc and the second scraper edge removes the remaining layers.
  5. Mixing kneader according to Patent Claims 1 to 4,
    characterised in that between two disc element planes, there are located at least two kneading counter elements, of which the one kneading counter element (20) scrapes the one disc surface and the other counter element (21) scrapes the oppositely lying disc surface (6).
  6. Mixing kneader according to Patent Claims 1 to 5,
    characterised in that, as well as the two kneading counter elements, in each case, between the discs in the housing, there is fired a wedge-shaped divider element (34) which divides the product stream on both of the oppositely lying disc surfaces.
  7. Mixing kneader according to Patent Claims 1 to 6,
    characterised in that on the kneader shaft (16), there is arranged, in each case, between two disc surfaces, a co-rotating substantially T-shaped kneading element (35) which engages between the open hook parts of the kneading counter element.
EP87112101A 1987-05-06 1987-08-20 Disc kneader Expired - Lifetime EP0289647B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87112101T ATE67427T1 (en) 1987-05-06 1987-08-20 DISC KNEADER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1726/87A CH674472A5 (en) 1987-05-06 1987-05-06
CH1726/87 1987-05-06

Publications (2)

Publication Number Publication Date
EP0289647A1 EP0289647A1 (en) 1988-11-09
EP0289647B1 true EP0289647B1 (en) 1991-09-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112101A Expired - Lifetime EP0289647B1 (en) 1987-05-06 1987-08-20 Disc kneader

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Country Link
US (1) US4824257A (en)
EP (1) EP0289647B1 (en)
JP (1) JPS63274437A (en)
AT (1) ATE67427T1 (en)
CA (1) CA1290745C (en)
CH (1) CH674472A5 (en)
DD (1) DD284610A5 (en)
DE (1) DE3773193D1 (en)
ES (1) ES2024463B3 (en)
SU (1) SU1687025A3 (en)

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US9908261B2 (en) * 2013-05-07 2018-03-06 Comadur S.A. Mixer, method of mixing raw material for powder metallurgy binder for injection moulding composition
JP6632549B2 (en) 2014-08-13 2020-01-22 ベルサリス、ソシエタ、ペル、アチオニＶｅｒｓａｌｉｓ Ｓ．Ｐ．Ａ． Rotor and stirring device
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DE102021127051A1 (en) 2021-10-19 2023-04-20 List Technology Ag Mixing kneader and method for carrying out an extraction
CN113694813B (en) * 2021-10-27 2022-02-15 如皋市井上捏和机械厂 Kneader reveals alarm system
DE102022102177A1 (en) 2022-01-31 2023-08-03 List Technology Ag Plant and method for processing a starting material into a form solution using the dry solution method
EP4219567A1 (en) 2022-01-31 2023-08-02 LIST Technology AG Assembly and method for processing a starting material into a forming solution by means of a dry dissolving process
KR20240148820A (en) 2022-01-31 2024-10-11 리스트 테크놀로지 아게 System and method for providing a molding solution by processing starting materials according to a dry melting method

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Also Published As

Publication number Publication date
ATE67427T1 (en) 1991-10-15
DD284610A5 (en) 1990-11-21
DE3773193D1 (en) 1991-10-24
SU1687025A3 (en) 1991-10-23
ES2024463B3 (en) 1992-03-01
CA1290745C (en) 1991-10-15
US4824257A (en) 1989-04-25
EP0289647A1 (en) 1988-11-09
CH674472A5 (en) 1990-06-15
JPS63274437A (en) 1988-11-11

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