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WO2001072425A1 - Strainer granulator for material in lumps - Google Patents

Strainer granulator for material in lumps Download PDF

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Publication number
WO2001072425A1
WO2001072425A1 PCT/EP2001/001251 EP0101251W WO0172425A1 WO 2001072425 A1 WO2001072425 A1 WO 2001072425A1 EP 0101251 W EP0101251 W EP 0101251W WO 0172425 A1 WO0172425 A1 WO 0172425A1
Authority
WO
WIPO (PCT)
Prior art keywords
granulator
perforated sheet
cage
sieve
strainer
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.)
Ceased
Application number
PCT/EP2001/001251
Other languages
German (de)
French (fr)
Inventor
Axel Eggert
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
Publication of WO2001072425A1 publication Critical patent/WO2001072425A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/144—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with axially elongated knives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/20—Disintegrating by grating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B02C2023/165—Screen denying egress of oversize material

Definitions

  • Material in powder form coming from the production process cannot easily be further processed into smaller compact units, such as tablets. This is due on the one hand to the fact that it is poorly free-flowing and on the other hand to the fact that when small units are pressed together it contains a relatively large amount of air, which impairs the cohesion of the material. It is therefore common to first compact the pulverulent material into flakes in a roller press under high pressure and then to comminute these coarse flakes in a granulator to form a free-flowing granulate. The granules of this granulate contain practically no air and can be easily compressed into smaller units such as tablets.
  • the aim is to process the material as gently as possible in order to keep the resulting fine fraction small with the smallest possible particle size distribution, because otherwise the flowability of the granulate is poor, which in turn results in fine grain screening and a return of a not inconsiderable proportion of the granulate to the roller press and again needs to be fed to the granulator.
  • This goal is only partially achieved with a known screen granulator.
  • Such a sieve granulator consists of a trough-shaped work space, which essentially consists of a sieve or perforated plate arranged on its periphery and an open, cylindrical cage rotating in the work space, which has on its circumference a plurality of longitudinal struts of the cage which form moldings when rotating the cage, strip the coarse-grained material to be granulated along the perforated sheet or sieve.
  • the perforated sheet or screen extends over the area of the second and third quadrants of the work area.
  • the invention has for its object to provide a screen granulator that granulates coarse material more effectively than the known screen granulator.
  • the moldings made of flat material are set at an angle so that they form tapered pockets with the perforated sheet or sieve, which carry the material to be shredded up to about the upper apex of the cage.
  • the sieve granulator has a trough-shaped working space 1, which is formed by a perforated sheet metal 2 and end walls 3, and a funnel-shaped housing 4 with outlet 5, which accommodates the working space 1.
  • a rotationally driven, cylindrical cage 6 which has 7 axial longitudinal struts on the circumference as scraper bars.
  • the perforated metal sheet 2 wraps around the cage 6 up to the area of the fourth quadrant in the direction of rotation of the cage 6. Because of the obliquely positioned moldings 7, when the cage 6 is rotating, coarse material 8 is poured into the work area 1 from above into the area of the fourth quadrant to the Streaked along perforated sheet.
  • the dwell time of the coarse material to be comminuted in the working space 1 is short. For the same reason, a smaller proportion of the coarse material is undesirably crushed. The yield for granules to be processed immediately is therefore high. In cases where minimization of the fine fraction is not important, significantly higher throughputs can be achieved with the same machine size. Depending on the shredding task and the product, performance increases of up to a factor of 3 were measured. The effort required for this surprisingly great technical success is not greater than the effort required for a conventional sieve granulator because it only consists in the larger wrap area of the cage 6 provided with the moldings 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Glanulating (AREA)

Abstract

The aim of the invention is to improve effectiveness and/or efficiency of a strainer granulator for material in lumps. A perforated sheet metal (2) which winds round a rotating retainer (6) extends into the fourth quadrant in the direction of rotation of the retainer (6). Striking bars (7) of the retainer (6) brush the material along the perforated sheet metal (2) up to the fourth quadrant, whereby said material has to be disintegrated. Said bars are arranged in an inclined manner. A shorter sojourn time of the material in the strainer granulator thus results and a smaller portion of powder-shaped up to very finely grained material thus results, whereby grain size distribution is small and said material has to be disintegrated. Said powder-shaped up to very finely grained material is not useful for immediate further processing.

Description

Siebgranulator für grobstückiges Material Sieve granulator for coarse material

Aus dem Produktionsprozeß kommendes Material in Pulverform läßt sich nicht ohne weiteres gut zu kleineren kompakten Einheiten, wie Tabletten, weiterverarbeiten. Das liegt zum einen daran, daß es schlecht rieselfähig ist und zum anderen daran, daß es beim Verpressen von kleineren Einheiten einen verhältnismäßig großen Luftanteil enthält, der den Zusammenhalt des Materials beeinträchtigt. Deshalb ist es üblich, das pulverförmige Material zunächst in einer Walzenpresse unter hohem Druck zu Schülpen zu kompaktieren und diese grobstückigen Schülpen anschließend in einem Granulator zu einem gut rieselfähigen Granulat zu zerkleinern. Die Körner dieses Granulats enthalten praktisch keine Luft und lassen sich problemlos zu kleineren Einheiten, wie Tabletten, verpressen.Material in powder form coming from the production process cannot easily be further processed into smaller compact units, such as tablets. This is due on the one hand to the fact that it is poorly free-flowing and on the other hand to the fact that when small units are pressed together it contains a relatively large amount of air, which impairs the cohesion of the material. It is therefore common to first compact the pulverulent material into flakes in a roller press under high pressure and then to comminute these coarse flakes in a granulator to form a free-flowing granulate. The granules of this granulate contain practically no air and can be easily compressed into smaller units such as tablets.

Beim Zerkleinern in einem Granulator wird eine möglichst schonende Bearbeitung angestrebt, um den entstehenden Feinanteil bei einer möglichst kleinen Korngrößenverteilung klein zu halten, weil sonst die Fließfähigkeit des Granulates schlecht ist, was wiederum eine Feinkornabsiebung und eine Rückführung eines nicht unerheblichen Anteils des Granulates zur Walzenpresse und erneute Zuführung zum Granulator nötig macht. Mit einem bekannten Siebgranulator wird dieses Ziel nur teilweise erreicht. Ein solcher Siebgranulator besteht aus einem muldenförmigen Arbeitsraum, der im wesentlichen von einem an seiner Peripherie angeordneten Sieb oder perforiertem Blech und einem in dem Arbeitsraum rotierenden, offenen, zylindrischen Käfig besteht, der an seinem Umfang eine Vielzahl von Längsstreben des Käfigs bildende Streichleisten aufweist, die bei Rotation des Käfigs das zu granulierende, grobstückige Material an dem perforierten Blech oder Sieb entlangstreifen. Das perforierte Blech oder Sieb erstreckt sich über den Bereich des zweiten und dritten Quadranten des Arbeitsraums .When comminuting in a granulator, the aim is to process the material as gently as possible in order to keep the resulting fine fraction small with the smallest possible particle size distribution, because otherwise the flowability of the granulate is poor, which in turn results in fine grain screening and a return of a not inconsiderable proportion of the granulate to the roller press and again needs to be fed to the granulator. This goal is only partially achieved with a known screen granulator. Such a sieve granulator consists of a trough-shaped work space, which essentially consists of a sieve or perforated plate arranged on its periphery and an open, cylindrical cage rotating in the work space, which has on its circumference a plurality of longitudinal struts of the cage which form moldings when rotating the cage, strip the coarse-grained material to be granulated along the perforated sheet or sieve. The perforated sheet or screen extends over the area of the second and third quadrants of the work area.

Beim Betrieb eines solchen Siebgranulators hat sich gezeigt, daß das von oben in den offenen Käfig eingefüllte, zu granulierende, grobstückige Material verhältnismäßig lange im Arbeitsraum bearbeitet wird und dabei ein Granulat mit einem unerwünscht hohem Feinanteil und verhältnismäßig großer Korngrößenverteilung entsteht.When operating such a screen granulator, it has been shown that the large-piece material to be granulated, which is filled into the open cage from above and is to be granulated, is processed for a relatively long time in the working space, and granules with an undesirably high proportion of fines and a relatively large particle size distribution result.

Der Erfindung liegt die Aufgabe zugrunde, einen Siebgranulator zu schaffen, der effektiver als der bekannte Siebgranulator grobstückiges Material granuliert.The invention has for its object to provide a screen granulator that granulates coarse material more effectively than the known screen granulator.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das perforierte Blech oder Sieb den Käfig in dessen Drehrichtung bis in den Bereich des vierten Quadranten umschlingt . Beim Betrieb mit dem erfindungsgemäßen Siebgranulator hat sich herausgestellt, daß die Verweilzeit des Materials im Arbeitsraum erheblich verringert und der entstehende Feinanteil erheblich herabgesetzt werden konnte.This object is achieved in that the perforated sheet or screen wraps around the cage in the direction of rotation up to the region of the fourth quadrant. When operating with the sieve granulator according to the invention, it has been found that the dwell time of the material in the work space is considerably reduced and the fine fraction that is produced can be considerably reduced.

Vorteilhaft wirkt sich in diesem Sinn aus, wenn die aus Flachmaterial bestehenden Streichleisten derart schräg angestellt sind, daß sie mit dem perforierten Blech oder Sieb keilförmig sich verjüngende Taschen bilden, die das zu zerkleinernde Material bis etwa zum oberen Scheitelpunkt des Käfigs tragen.In this sense, it has an advantageous effect if the moldings made of flat material are set at an angle so that they form tapered pockets with the perforated sheet or sieve, which carry the material to be shredded up to about the upper apex of the cage.

Im folgenden wird die Erfindung anhand einer Zeichnung näher erläutert, die den Siebgranulator im seitlichen Vertikalschnitt zeigt.The invention is explained in more detail below with reference to a drawing which shows the sieve granulator in a lateral vertical section.

Der Siebgranulator weist einen muldenförmigen Arbeitsraum 1, der von einem perforierten Blech 2 und stirnseitigen Wänden 3 gebildet wird, und ein den Arbeitsraum 1 aufnehmendes, trichterförmiges Gehäuse 4 mit Auslauf 5 auf. In dem muldenförmigen Arbeitsraum 1 ist ein rotierend angetriebener, zylinderförmiger Käfig 6 angeordnet, der am Umfang als Streichleisten 7 axiale Langsstreben aufweist. Das perforierte Blech 2 umschlingt den Käfig 6 bis in den Bereich des vierten Quadranten in Drehrichtung des Käfigs 6. Wegen der schräg angestellten Streichleisten 7 wird bei rotierendem Käfig 6 von oben in den Arbeitsraum 1 eingefülltes, grobstückiges Material 8 bis in den Bereich des vierten Quadranten an dem perforierten Blech entlanggestreift. Das bedeutet, daß sich der Arbeitsbereich für das Granulieren bis in diesen Bereich erstreckt. Das bis zu diesem Ort nicht durch das perforierte Blech 2 in den trichterförmigen Sammelraum des Gehäuses 4 hindurchgedrückte Material fällt dann zurück in den offenen Käfig 6 und wird erneut von den Streichleisten 7 aus dem unteren Bereich des Arbeitsraums 1 entlang dem gelochten Blech 2 bis in den oberen Bereich transportiert .The sieve granulator has a trough-shaped working space 1, which is formed by a perforated sheet metal 2 and end walls 3, and a funnel-shaped housing 4 with outlet 5, which accommodates the working space 1. Arranged in the trough-shaped working space 1 is a rotationally driven, cylindrical cage 6, which has 7 axial longitudinal struts on the circumference as scraper bars. The perforated metal sheet 2 wraps around the cage 6 up to the area of the fourth quadrant in the direction of rotation of the cage 6. Because of the obliquely positioned moldings 7, when the cage 6 is rotating, coarse material 8 is poured into the work area 1 from above into the area of the fourth quadrant to the Streaked along perforated sheet. This means that the working area for the granulation extends into this area. The material not pushed through the perforated sheet 2 into the funnel-shaped collecting space of the housing 4 then falls back into the open cage 6 and is again struck by the moldings 7 from the lower area of the working space 1 along the perforated sheet 2 into transported upper area.

Wegen des vergrößerten Arbeitsbereichs des erfindungsgemäßen Siebgranulators ist die Verweilzeit des zu zerkleinernden grobstückigen Materials im Arbeitsraum 1 kurz . Aus dem gleichen Grund wird auch ein geringerer Anteil des grobstückigen Materials unerwünscht stark zerkleinert. Die Ausbeute für unmittelbar weiterzuverarbeitendes Granulat ist deshalb hoch. In den Fällen, in denen es auf eine Minimierung des Feinanteils nicht ankommt, sind bei gleicher Maschinengröße wesentlich höhere Durchsatzleistungen zu erreichen. Je nach Zerkleinerungsaufgabe und Produkt wurden Leistungssteigerungen bis zum Faktor 3 gemessen. Der für diesen überraschend großen technischen Erfolg zu treibende Aufwand ist nicht größer als der Aufwand, der für einen herkömmlichen Siebgranulator zu treiben ist, weil er lediglich in dem größeren Umschlingungsbereich des mit den Streichleisten 7 versehenen Käfigs 6 besteht. Because of the enlarged working area of the sieve granulator according to the invention, the dwell time of the coarse material to be comminuted in the working space 1 is short. For the same reason, a smaller proportion of the coarse material is undesirably crushed. The yield for granules to be processed immediately is therefore high. In cases where minimization of the fine fraction is not important, significantly higher throughputs can be achieved with the same machine size. Depending on the shredding task and the product, performance increases of up to a factor of 3 were measured. The effort required for this surprisingly great technical success is not greater than the effort required for a conventional sieve granulator because it only consists in the larger wrap area of the cage 6 provided with the moldings 7.

Claims

A N S P R U C H E EXPECTATIONS 1. Siebgranulator für grobstückiges Material mit einem muldenförmigen, an seiner Peripherie von einem perforierten Blech (2) oder Sieb gebildeten Arbeitsraum1. Sieve granulator for coarse material with a trough-shaped work space formed on its periphery by a perforated sheet (2) or sieve (1) und einem darin rotierend angetriebenen, zylindrischen, offenen Käfig (6) , der an seinem Umfang als Streichleisten (7) ausgebildete Längsstreben aufweist, die bei rotierendem Käfig (6) das zu zerkleinernde, grobstückige Material an dem perforierten Blech (2) entlangstreifen, d a d u r c h g e k e n n z e i c h n e t , daß das perforierte Blech (2) oder Sieb den Käfig (6) in dessen Drehrichtung bis im Bereich des vierten Quadranten umschlingt .(1) and a cylindrical, open cage (6) which is driven in rotation and has longitudinal struts formed on its circumference as moldings (7), which, when the cage rotates (6), the coarse material to be shredded on the perforated sheet (2) strip along, characterized in that the perforated sheet (2) or sieve wraps around the cage (6) in its direction of rotation up to the region of the fourth quadrant. 2. Siebgranulator nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die2. Sieve granulator according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the Streichleisten (7) aus Flachmaterial bestehen und derart schräg angestellt sind, daß sie mit dem perforierten Blech (2) keilförmig sich verjüngende Taschen bilden, in denen das grobstückige Material bis etwa zum oberen Scheitelpunkt des Käfigs (6) getragen wird. Screed strips (7) consist of flat material and are inclined so that they form wedge-shaped tapered pockets with the perforated sheet metal (2), in which the coarse material is carried up to about the upper apex of the cage (6).
PCT/EP2001/001251 2000-03-24 2001-02-06 Strainer granulator for material in lumps Ceased WO2001072425A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10014714.3 2000-03-24
DE2000114714 DE10014714C2 (en) 2000-03-24 2000-03-24 Sieve granulator for coarse material

Publications (1)

Publication Number Publication Date
WO2001072425A1 true WO2001072425A1 (en) 2001-10-04

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PCT/EP2001/001251 Ceased WO2001072425A1 (en) 2000-03-24 2001-02-06 Strainer granulator for material in lumps

Country Status (3)

Country Link
CH (1) CH694789A5 (en)
DE (1) DE10014714C2 (en)
WO (1) WO2001072425A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016142251A1 (en) 2015-03-10 2016-09-15 Alexanderwerk Gmbh Device for producing a granulate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114226234A (en) * 2021-12-15 2022-03-25 青岛浩大生物科技工程有限责任公司 Dust collector is used in health products production

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847990A (en) * 1928-07-21 1932-03-01 Wolf Company Cutting machine
FR1102773A (en) * 1954-06-22 1955-10-25 Friction crusher
US2974883A (en) * 1955-10-05 1961-03-14 Vasco Ind Corp Process for pulverizing thermoplastic material
US3329349A (en) * 1963-07-19 1967-07-04 Pasteka Josef Apparatus for pulverizing plastic materials
DE3208357A1 (en) * 1981-03-14 1982-09-23 Basf Ag, 6700 Ludwigshafen Device for granulating plastic or solid materials
GB2268097A (en) * 1992-06-19 1994-01-05 Yang Mu Tsang Crushing machine.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE718509C (en) * 1937-09-30 1942-03-13 Ruhrchemie Ag Process for dividing water-containing masses which, despite their high water content, have a stiff consistency and separate under pressure into solid and liquid components, while being pressed through perforated plates in a thin line

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1847990A (en) * 1928-07-21 1932-03-01 Wolf Company Cutting machine
FR1102773A (en) * 1954-06-22 1955-10-25 Friction crusher
US2974883A (en) * 1955-10-05 1961-03-14 Vasco Ind Corp Process for pulverizing thermoplastic material
US3329349A (en) * 1963-07-19 1967-07-04 Pasteka Josef Apparatus for pulverizing plastic materials
DE3208357A1 (en) * 1981-03-14 1982-09-23 Basf Ag, 6700 Ludwigshafen Device for granulating plastic or solid materials
GB2268097A (en) * 1992-06-19 1994-01-05 Yang Mu Tsang Crushing machine.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016142251A1 (en) 2015-03-10 2016-09-15 Alexanderwerk Gmbh Device for producing a granulate
DE102015205642A1 (en) 2015-03-10 2016-09-15 Alexanderwerk Gmbh Apparatus for producing a granulate
CN107530663A (en) * 2015-03-10 2018-01-02 亚历山大创造股份有限公司 Apparatus for making pellets
JP2018507781A (en) * 2015-03-10 2018-03-22 アレクサンダーバーク ゲーエムベーハー Equipment for producing granular materials
CN107530663B (en) * 2015-03-10 2021-03-16 亚历山大创造股份有限公司 device for making pellets
DE102015205642B4 (en) 2015-03-10 2025-11-20 Alexanderwerk Gmbh Device for producing granules

Also Published As

Publication number Publication date
DE10014714C2 (en) 2002-06-27
DE10014714A1 (en) 2001-10-11
CH694789A5 (en) 2005-07-29

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