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EP0238147B2 - Procédé pour exploiter un moulin d'extrusion et moulin d'extrusion à utiliser dans ce procédé - Google Patents

Procédé pour exploiter un moulin d'extrusion et moulin d'extrusion à utiliser dans ce procédé Download PDF

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Publication number
EP0238147B2
EP0238147B2 EP87200497A EP87200497A EP0238147B2 EP 0238147 B2 EP0238147 B2 EP 0238147B2 EP 87200497 A EP87200497 A EP 87200497A EP 87200497 A EP87200497 A EP 87200497A EP 0238147 B2 EP0238147 B2 EP 0238147B2
Authority
EP
European Patent Office
Prior art keywords
drum
rollers
mill
axes
extrusion
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 - Lifetime
Application number
EP87200497A
Other languages
German (de)
English (en)
Other versions
EP0238147A1 (fr
EP0238147B1 (fr
Inventor
Antonius Petrus Theodorus Van Benthum
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.)
A P T Van Benthum Beheer BV
Original Assignee
A P T Van Benthum Beheer BV
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19847733&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0238147(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by A P T Van Benthum Beheer BV filed Critical A P T Van Benthum Beheer BV
Priority to AT87200497T priority Critical patent/ATE49155T1/de
Publication of EP0238147A1 publication Critical patent/EP0238147A1/fr
Application granted granted Critical
Publication of EP0238147B1 publication Critical patent/EP0238147B1/fr
Publication of EP0238147B2 publication Critical patent/EP0238147B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/20—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring
    • B30B11/201—Roller-and-ring machines, i.e. with roller disposed within a ring and co-operating with the inner surface of the ring for extruding material
    • B30B11/208—Roller constructions; Mounting of the rollers

Definitions

  • This invention relates to a method for operating an extrusion mill, in particular a pellet mill, comprising a perforated drum and a number of rollers within the drum, rotatable about their axes and cooperating with the drum to press material to be treated through the perforations in the drum wall, with driving means to have the drum and the axes of the rollers rotate relatively to each other about the axis of the drum, with means to adjust the position of the rollers radially with respect to the drum wall, and to an extrusion mill for use in this method.
  • extrusion mills are often used for making compressed feed in the shape of so-called pellets for feeding cattle or for making pellets for other purposes, by pressing the materials by force through the openings in the drum by the action of the rollers.
  • the strands of material extruded through the openings in the drum can be peeled off by a knife blade along the outer wall of the drum so as to form short cylindrical "rods", the so-called pellets.
  • extrusion mills are known, e.g. from US-A-2.157.528; 2.160.302; 2.240.660 and 2.648.296.
  • rollers are adjustable towards and away from the drum wall, sometimes over a short distance, in other cases over a longer distance.
  • the mill has to be stopped or at least the extrusion has to be interrupted, e.g. because the mill casing has to be opened for the adjustment.
  • the rollers are free to move outwardly towards the drum wall by centrifugal force, the adjusting means only defining their radially inward position, but also in such cases the rollers are almost immediately pushed inwardly into said inward position as soon as material to be extruded is fed into the drum.
  • the present invention is based on the insight that, for many materials to be treated in such mills, this situation is known mills of this type is disadvantageous and avoid or make totally impossible an efficient operation. If the rollers are initially put into a position at a distance from the drum wall they will at first not rotate, but on further feeding of the mill the material fed thereto, which often is tacky, will clog and block the mill entirely. This is also the case when the rollers are free, in an empty mill, to contact the drum wall by centrifugal force.
  • the present invention aims at improving such a method and such a mill in the above respects and to this end first of all a method as indicated above is according to the invention characterized in that at the beginning of the extrusion, the rollers are positioned with their peripheries close to the drum wall and that, during continuing extrusion, the rollers are moved inwardly to take up a distance from the drum wall, by means operable from the outside of the mill.
  • An extrusion mill in particular a pellet mill, comprising in known way a perforated drum and a number of rollers within the drum, rotatable about their axes and cooperating with the drum to press material to be treated through the perforations in the drum wall, with driving means to have the drum and the axes of the rollers rotate relatively to each other about the axis of the drum, with means to adjust the position of the rollers radiallywith respect to the drum wall, is according to the invention characterized in that a rotatable adjusting shaft is provided with its axis in the axis of the drum, and extending to the outside of the mill through a coaxial shaft supporting the rollers, said adjusting shaft having means outside the mill to rotate this shaft, onto which shaft cam means are provided, the axes of the rollers being guided movably by the means carrying the rollers, the cam means cooperating with parts on the axes of the rollers in order to allow or cause movement of these axes radially inwardly when the adjusting shaft with cam means
  • spring means are provided, acting on the said parts on the axes of the rollers, to urge the said parts radially into contact with the cam means.
  • this is characterized in that the feed means for material to be extruded, extending through one of the bordering end faces of the mill perpendicularly to the axis of the drum, the adjusting shaft extending through supporting means for the drum at the other side of the drum, said shaft having, outside said supporting means, drive means and means for indicating its angular position and therewith the distance of the rollers to the drum wall.
  • the feed side of the drum is fully free for this feed and is not obstructed by the adjusting mechanism, so that it is possible to feed the material to be treated freely from above into the lower part of the drum, as is desired, while said drive means and indicating means are positioned at a distance from the flow of material, so that they for instance are not subjected to the often rather high temperatures in the drum where pressing often takes place in a steam atmosphere.
  • the adjusting shaft may easily be provided for instance in a thick hollow hub shaft for rotating the drum and supporting it in cantilever fashion.
  • An extrusion mill of the type as indicated has a casing 1, in which means are present, not shown, such as an electric motor and a transmission mechanism with gearwheels, chains or V-belts, of which the driven part is rigidly connected to a hub sleeve 2, which is rigidly connected to a cylindrical drum wall 3 having a large number of throughgoing radial openings.
  • a hub sleeve 2 is journalled on and around a stationery central shaft 5, to which a disk 6 is rigidly connected, having supporting means for three pressing rollers 7, which are freely rotatable with respect to and supported by shafts 8 in a manner generally known.
  • a casing 9 connected by pivoting means not shown to casing 1 and locked by locking means opposite said pivoting means so that this casing 9 may be opened and swung away from the drum to give access thereto.
  • the casing 9 serves to shroud the moving parts therein, forsealing them with respect to the ambient atmosphere also at the supply side for the material and for taking up pellets formed therein.
  • a doctoring knife blade not shown can rest against the outside wall of the drum 3 and be urged towards it by resilient means, as usual.
  • this knife blade As this knife blade is stationery and the drum rotates this knife blade can peel off the extruded strands of material issuing from the openings in the drumm wall and having a considerable coherence, so as to divide them in mainly cylindrical bodies of relatively short length, the so-called pellets.
  • a feed funnel 10 for feeding the material to be treated is rigidly connected to the end wall of casing 9. At the inside of said end wall there is a substantially annular body 11 extending into close proximity of the left terminal edge of the drum as seen in Fig. 1, said body 11 having blades or other guides 12 to give the material fed thereto a component of movement towards the inside of the drum 3.
  • the central stationery shaft 5 is hollow in that it has a central throughgoing opening, through which an adjusting shaft 13 extends, which is journalled at 14 at left and right in disk 6 and shaft 5 respectively.
  • a disk 17 is provided with suitable indexing means, cooperating with a feeler 18 for observing the angular position of disk 17 and thus of shaft 13. This observation may be performed in several ways, mechanically or electrically, as usual.
  • the feeler 18 gives a signal to a panel 19 allowing direct reading of the angular position of disk 17 or of an indication, obtained by direct translation thereof, of the distance of the rollers 7 to the inner wall of the drum 3.
  • the disk 6 and the carrier 21 have three radial guide tracks 22 at mutual angles of 120°, with in each of said guide tracks a sliding block 23 with a bearing for the shaft 8 of a roller 7.
  • a cam disk 25 with three cam faces 26, each extending over 120° of the cam disk 25, and each sliding block 23 has a follower body 27 of hard material, by which it is in contact with the outer periphery of the cam disk 25.
  • each sliding block 23 By rotating the adjusting shaft 13 the cam disks 25 rotate therewith, so that the radial position of each sliding block 23 is changed by such rotation.
  • the two opposite sliding blocks for each roller 7 are positioned symmetrically and at the same angles in the peripheral direction that the axes 8 of the rollers are always maintained parallel to the wall of the drum 3.
  • Figs 1 and 2 it is shown that the axes 8 of the rollers 7, shown in Fig. 1 as dot and dash-lines and in Fig. 2 as a point, have eccentric shaft trunnions 8', so that when rotating them in the blocks 23 with the aid of the hexagonal heads as shown in Fig. 2 these axes are somewhat displaced with respect to the axes of said trunnions 8'.
  • This serves only for a mutual adjustment of the rollers over a very small radial distance, so that they can be adjusted to be exactly in the same position radially with respect to the drum wall notwithstanding dimensional deviations in the structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Disintegrating Or Milling (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Feed For Specific Animals (AREA)

Claims (4)

1. Procédé pour faire fonctionner un moulin d'extrusion, en particulier un moulin à granules comportant un tambour perforé (3) et un certain nombre de cylindres (7) à l'intérieur du tambour (3) pouvant tourner autour de leurs axes (6) et coopérant avec le tambour (3) pour comprimer un matériau à traiter à travers les perforations dans la paroi du tambour, avec un dispositif d'entraînement pour permettre au tambour (3) et aux axes (8) des cylindres (7) de tourner relativement les uns par rapport aux autres autour de l'axe du tambour (3), avec des moyens (20-27) pour régler la position des cylindres (7) radialement par rapport à la paroi du tambour, caractérisée en ce que, au début de l'extrusion, les cylindres sont positionnés avec leur périphérie au voisinage immédiat de la paroi du tambour et en ce que, pendant que l'extrusion se poursuit, les cylindres sont déplacés vers l'intérieur pour prendre une certaine distance à partir de la paroi de tambour, par des moyens (15, 16) pouvant être actionnés à partir de l'extérieur du moulin.
2. Moulin d'extrusion, en particulier un moulin pour granules, comportant un tambour perforé (3) et un certain nombre de cylindres (7) à l'intérieur du tambour (3), pouvant tourner autour de leurs axes (8), et coopérant avec le tambour (3) pour comprimer un matériau à traiter à travers les perforations de la paroi du tambour avec un dispositif d'entraînement pour permettre au tambour (3) et aux axes (8) des cylindres (7) de tourner relativement les uns par rapport aux autres autour de l'axe du tambour avec des moyens (20, 27) pour régler la position des cylindres (7) radialement par rapport à la paroi de tambour, caractérisé en ce qu'un arbre rotatif de réglage (13) est prévu avec son axe dans l'axe du tambour et qui s'étend à l'extérieur du moulin au travers d'un arbre coaxial (5) pour supporter les cylindres (7), ledit arbre de réglage (13) ayant des moyens (15, 16) se prolongeant à l'extérieur du moulin pour faire tourner cet arbre, sur lequel des moyens de came (25,26) sont prévus, les axes (8) des cylindres (7) étant guidés de manière mobile par les moyens (6, 21) portant les cylindres, les moyens de came (25, 26) coopérant avec des éléments (27) sur les axes (8) des cylindres (7 afin de permettre ou de provoquer le déplacement de ces axes (8) radialement vers l'intérieur lorsque l'arbre de réglage (13) avec les moyens de came (25, 26) sont entraînés en rotation par rapport à ces axes (8).
3. Moulin d'extrusion selon la revendication 2, dans lequel des moyens élastiques (34) sont prévus sur les moyens de support (21) des cylindres pour maintenir lesdits éléments (27) sur les axes (8) des cylindres (7), coopérant avec les moyens de came (25, 26), en contact avec eux.
4. Moulin d'extrusion selon la revendication 2 ou 3, dans lequel le tambour (3) comporte des moyens d'alimentation (10, 12) pour un matériau à extru- der, se prolongeant à travers l'une des faces terminales limitrophes du moulin perpendiculairement à l'axe du tambour, l'arbre de réglage (13) s'étendant à travers les moyens de support (5, 6) du tambour (3) de l'autre côté du tambour (3), ledit arbre (13) présentant, à l'extérieur desdits moyens de support (5, 6), des moyens d'entrai- nement (15, 16) et des moyens (17, 19) pour indiquer sa position angulaire et conjointement la distance des rouleaux (7) à la paroi du tambour.
EP87200497A 1986-03-18 1987-03-18 Procédé pour exploiter un moulin d'extrusion et moulin d'extrusion à utiliser dans ce procédé Expired - Lifetime EP0238147B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87200497T ATE49155T1 (de) 1986-03-18 1987-03-18 Verfahren zum betaetigen einer extrusionsmuehle und extrusionsmuehle zum anwenden in diesem verfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8600693 1986-03-18
NL8600693 1986-03-18

Publications (3)

Publication Number Publication Date
EP0238147A1 EP0238147A1 (fr) 1987-09-23
EP0238147B1 EP0238147B1 (fr) 1990-01-03
EP0238147B2 true EP0238147B2 (fr) 1993-05-12

Family

ID=19847733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87200497A Expired - Lifetime EP0238147B2 (fr) 1986-03-18 1987-03-18 Procédé pour exploiter un moulin d'extrusion et moulin d'extrusion à utiliser dans ce procédé

Country Status (5)

Country Link
EP (1) EP0238147B2 (fr)
AT (1) ATE49155T1 (fr)
DE (1) DE3761295D1 (fr)
ES (1) ES2012384T5 (fr)
GR (1) GR3000270T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2028793T3 (es) * 1986-01-24 1992-07-16 Buhler Ag Prensa para hacer tacos de material aglomerado.
JPH0784010B2 (ja) * 1991-11-29 1995-09-13 株式会社神戸製鋼所 水中カット造粒装置
DE4426372A1 (de) 1994-07-26 1996-02-01 Salzhausener Maschinenbautechn Verfahren zum Verarbeiten von pelletierbarem Material
NL1004319C2 (nl) * 1996-10-18 1998-04-21 Pelleting Technologie Nederlan Pelleteerpers.
RU2207247C1 (ru) * 2002-08-06 2003-06-27 Белгородская государственная технологическая академия строительных материалов Пресс-валковый экструдер
DE102008015617B4 (de) * 2008-03-26 2021-01-14 Salzhausener Maschinenbautechnik Salmatec Gmbh Kollerverstellvorrichtung
NL2014925B1 (en) 2015-06-05 2017-02-03 Pelleting Tech Nederland B V Pellet press comprising a single roller.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2157528A (en) * 1936-05-15 1939-05-09 Western Pellet Machine Corp Machine for forming compressed feeds and similar products
US2160302A (en) * 1938-04-25 1939-05-30 Popick Mfg Company A Compressed feed machine
US2240660A (en) * 1940-02-26 1941-05-06 Edgar T Meakin Extrusion mill
US2648296A (en) * 1948-05-29 1953-08-11 Sennet A Oliver Pellet mill
CH431250A (de) * 1963-09-30 1967-02-28 Muehlenbau Dresden Veb Anpressvorrichtung für Presswalzen in Kraftfuttermittelpressen

Also Published As

Publication number Publication date
ATE49155T1 (de) 1990-01-15
GR3000270T3 (en) 1991-03-15
EP0238147A1 (fr) 1987-09-23
EP0238147B1 (fr) 1990-01-03
ES2012384B3 (es) 1990-03-16
ES2012384T5 (es) 1995-08-01
DE3761295D1 (de) 1990-02-08

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