EP0127736B1 - Press for producing pellets from bulk material - Google Patents

Press for producing pellets from bulk material Download PDF

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Publication number
EP0127736B1
EP0127736B1 EP84103035A EP84103035A EP0127736B1 EP 0127736 B1 EP0127736 B1 EP 0127736B1 EP 84103035 A EP84103035 A EP 84103035A EP 84103035 A EP84103035 A EP 84103035A EP 0127736 B1 EP0127736 B1 EP 0127736B1
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EP
European Patent Office
Prior art keywords
wheel
press
die
projections
lugs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84103035A
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German (de)
French (fr)
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EP0127736A1 (en
Inventor
Ulrich Walter
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT84103035T priority Critical patent/ATE19739T1/en
Publication of EP0127736A1 publication Critical patent/EP0127736A1/en
Application granted granted Critical
Publication of EP0127736B1 publication Critical patent/EP0127736B1/en
Expired legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a press for producing pellets from bulk material, in particular feed pellets, which can consist of more or less coarse-grained feed, straw and the like.
  • the invention relates to presses of this type which have a circular die having a plurality of radial press channels and in it a coaxial holder of press rolls, each of which almost touches the die with its circumference.
  • the object of the invention is to provide a press which avoids these disadvantages.
  • this object is achieved in that a wheel is fastened to the die shaft, which has projections on its circumference and a hydraulic tappet is arranged on the housing of the press so that it can move against a spring force in the plane of the wheel gripping behind one of the projections, the wheel can turn gradually by tangential thrust.
  • the projections of the wheel mentioned are preferably sawtooth-shaped and directed in such a way that the tappet lies against the short flank of such a projection, which forms a hollow surface.
  • a shaft which is driven by means of a pulley 25 and has a tubular section 5, which ends in a flange 3, is mounted in a housing.
  • An annular die 2 is clamped between the flange 3 and a flange 4 concentric therewith, which has a plurality of radial bores 2a.
  • Adjoining the flange 4 is an inlet tube 6, the inner edge of which rests on a sealing ring 7 of the housing 1.
  • three press rollers 12 which rotate freely around axes parallel to the tubular shaft 5, are arranged at equal angular intervals and can be adjusted radially to the die 2 by means of adjusting devices in a known manner in such a way that their distance from the inner circumference of the die 2 can be adjusted.
  • the tubular shaft section 5 has radial projections 5a (see FIG. 2) on which a disk-shaped wheel 15 is seated, which has corresponding recesses 15a on its inner circumference.
  • the outer circumference of the wheel 15 has a plurality of sawtooth-shaped projections 16.
  • the short surfaces 16a of these sawtooth-shaped projections form hollow surfaces.
  • a plunger 17, which can be advanced by a hydraulic cylinder 18, rests with its head 17a on one of these hollow surfaces 16a.
  • the cylinder 18 is pivotable about an axis 19 in the plane of the wheel 15.
  • the head 17a of the tappet 17 is pulled against the circumference of the wheel 15 by a spring 20 attached to the cylinder 18.
  • the cylinder 18 is connected by hoses 21, 22 to a pressure oil source in such a way that the tappet 17 is moved upward by the pressure oil and thus the wheel 15 can rotate about its axis during the upward movement.
  • the oil supply to the cylinder 18 is reversed in such a way that pressure oil flows out.
  • the plunger head 17a falls down and is pulled by the spring 20 against the circumference of the wheel 15, so that it engages in a tooth surface 16a of the next tooth.
  • the die 2 With the aid of the plunger 17, the die 2 can thus also be rotated with respect to the press rollers 12 and can thus be released from a stuck position when the drive motor of the die is not sufficient to set the die in motion.

Abstract

1. A press for producing pellets from loose bulk material, which comprises an annular female die having a plurality of radial press channels and within it a coaxial, non-rotatable holder of pressrolls of which each by its circumference almost touches the die, characterised in that a wheel (15) is mounted on the shaft (5) of the die (2), which wheel (15) is provided with circumferential lugs or projections (16) whilst on the press housing (1) there is provided an hydraulic ram (17) which is movable in the plane of said wheel in opposition to spring loading in such a manner as to be capable of intermittently rotating the wheel by tangential thrust engaging in each case behind one of said lugs or projections (16).

Description

Die Erfindung betrifft eine Presse zum Erzeugen von Pellets aus Schüttgut, insbesondere von Futtermittel-Pellets, die aus mehr oder weniger grobgekörnten Futtermitteln, Stroh und dergleichen bestehen können.The invention relates to a press for producing pellets from bulk material, in particular feed pellets, which can consist of more or less coarse-grained feed, straw and the like.

Die Erfindung bezieht sich auf Pressen dieser Art, die eine kreisförmige, eine Vielzahl radialer Presskanäle aufweisende Matrize und in ihr einen zu ihr koaxialen Halter von Pressrollen aufweist, von denen jede mit ihrem Umfang die Matrize nahezu berührt.The invention relates to presses of this type which have a circular die having a plurality of radial press channels and in it a coaxial holder of press rolls, each of which almost touches the die with its circumference.

Bei solchen Pressen kann der Widerstand zwischen Pressrollen und Matrize zeitweise so gross werden, dass der Antriebsmotor der Matrize nicht mehr ausreicht, die Matrize zu drehen. Das ergibt sich insbesondere nach einem Stillstand der mit zu verarbeitendem Material gefüllten Presse. In solchen Fällen muss die Presse ausgeräumt werden, was zu erheblichem Arbeitsaufwand und zu längerem Stillstand der Presse führt.In such presses, the resistance between the press rolls and the die can temporarily become so great that the drive motor of the die is no longer sufficient to rotate the die. This results in particular after the press, which is filled with the material to be processed, has come to a standstill. In such cases, the press has to be cleared, which leads to considerable workload and prolonged downtime of the press.

Aufgabe der Erfindung ist, eine Presse zu schaffen, die diese Nachteile vermeidet.The object of the invention is to provide a press which avoids these disadvantages.

Gemäss der Erfindung wird diese Aufgabe dadurch gelöst, dass auf der Welle der Matrize ein Rad befestigt ist, das auf seinem Umfang Vorsprünge aufweist und am Gehäuse der Presse ein Hydraulik-Stössel in der Ebene des Rades gegen eine Federkraft derart beweglich angeordnet ist, dass er, jeweils hinter einen der Vorsprünge greifend, das Rad durch Tangentialschub schrittweise drehen kann.According to the invention, this object is achieved in that a wheel is fastened to the die shaft, which has projections on its circumference and a hydraulic tappet is arranged on the housing of the press so that it can move against a spring force in the plane of the wheel gripping behind one of the projections, the wheel can turn gradually by tangential thrust.

Vorzugsweise sind die Vorsprünge des genannten Rades sägezahnförmig und so gerichtet, dass der Stössel jeweils gegen die kurze Flanke eines solchen Vorsprungs anliegt, die eine Hohlfläche bildet.The projections of the wheel mentioned are preferably sawtooth-shaped and directed in such a way that the tappet lies against the short flank of such a projection, which forms a hollow surface.

Die Zeichnung zeigt ein Ausführungsbeispiel der Erfindung.

  • Figur 1 zeigt einen axialen Längsschnitt durch den wesentlichen Teil einer Presse gemäss der Erfindung,
  • Figur 2 zeigt einen Schnitt nach Linie 11-11 der Figur 1.
The drawing shows an embodiment of the invention.
  • FIG. 1 shows an axial longitudinal section through the essential part of a press according to the invention,
  • Figure 2 shows a section along line 11-11 of Figure 1.

In einem Gehäuse ist eine mittels einer Riemenscheibe 25 angetriebene Welle gelagert, die einen rohrförmigen Abschnitt 5 hat, der in einem Flansch 3 endet. Zwischen dem Flansch 3 und einem dazu konzentrischen Flansch 4 ist eine kreisringförmige Matrize 2 festgeklemmt, die eine Vielzahl radialer Bohrungen 2a hat. An den Flansch 4 schliesst sich ein Einlasstubus 6 an, dessen Innenrand an einem Dichtring 7 des Gehäuses 1 anliegt. In die Öffnung des Dichtrings 7 ragt ein Rohrstutzen 8, in dem eine Förderschnecke 9 sitzt, die Schüttgut in das Innere der Matrize 2 fördern kann.A shaft, which is driven by means of a pulley 25 and has a tubular section 5, which ends in a flange 3, is mounted in a housing. An annular die 2 is clamped between the flange 3 and a flange 4 concentric therewith, which has a plurality of radial bores 2a. Adjoining the flange 4 is an inlet tube 6, the inner edge of which rests on a sealing ring 7 of the housing 1. A pipe socket 8, in which a screw conveyor 9 is seated, projects into the opening of the sealing ring 7 and can convey bulk material into the interior of the die 2.

Im Innenraum der Matrize 2 sind drei Pressrollen 12, die um zur rohrförmigen Welle 5 parallele Achsen frei umlaufen, in gleichen Winkelabständen angeordnet und radial zur Matrize 2 mittels Stellvorrichtungen in bekannter Weise derart verstellbar, dass ihr Abstand vom Innenumfang der Matrize 2 einstellbar ist.In the interior of the die 2, three press rollers 12, which rotate freely around axes parallel to the tubular shaft 5, are arranged at equal angular intervals and can be adjusted radially to the die 2 by means of adjusting devices in a known manner in such a way that their distance from the inner circumference of the die 2 can be adjusted.

Der rohrförmige Wellenabschnitt 5 hat radiale Vorsprünge 5a (siehe Figur 2), auf denen ein scheibenförmiges Rad 15 sitzt, das an seinem Innenumfang entsprechende Ausnehmungen 15a hat. Der Aussenumfang des Rades 15 weist eine Vielzahl sägezahnförmiger Vorsprünge 16 auf. Die kurzen Flächen 16a dieser sägezahnförmigen Vorsprünge bilden Hohlflächen. Ein Stössel 17, der durch einen hydraulischen Zylinder 18 vorschiebbar ist, liegt mit seinem Kopf 17a an einer dieser Hohlflächen 16a an. Der Zylinder 18 ist um eine Achse 19 in der Ebene des Rades 15 schwenkbar. Durch eine am Zylinder 18 angebrachte Feder 20 wird der Kopf 17a des Stössels 17 gegen den Umfang des Rades 15 gezogen. Der Zylinder 18 ist durch Schläuche 21, 22 mit einer Druckölquelle derart verbunden, dass durch das Drucköl der Stössel 17 aufwärts bewegt wird und somit bei der Aufwärtsbewegung das Rad 15 um seine Achse drehen kann. Sobald der Stösselkopf 17a seine höchste Stellung 17a' erreicht hat, wird die Ölzufuhr zum Zylinder 18 derart umgesteuert, dass Drucköl ausfliesst. Infolgedessen fällt der Stösselkopf 17a nach unten und wird durch die Feder 20 gegen den Umfang des Rades 15 gezogen, so dass er in eine Zahnfläche 16a des nächstfolgenden Zahnes eingreift. Mit Hilfe des Stössels 17 kann somit die Matrize 2 gegenüber den Pressrollen 12 auch dann gedreht und somit aus einer festgeklebten Stellung gelöst werden, wenn derAntriebsmotor der Matrize nicht ausreicht, die Matrize in Bewegung zu setzen.The tubular shaft section 5 has radial projections 5a (see FIG. 2) on which a disk-shaped wheel 15 is seated, which has corresponding recesses 15a on its inner circumference. The outer circumference of the wheel 15 has a plurality of sawtooth-shaped projections 16. The short surfaces 16a of these sawtooth-shaped projections form hollow surfaces. A plunger 17, which can be advanced by a hydraulic cylinder 18, rests with its head 17a on one of these hollow surfaces 16a. The cylinder 18 is pivotable about an axis 19 in the plane of the wheel 15. The head 17a of the tappet 17 is pulled against the circumference of the wheel 15 by a spring 20 attached to the cylinder 18. The cylinder 18 is connected by hoses 21, 22 to a pressure oil source in such a way that the tappet 17 is moved upward by the pressure oil and thus the wheel 15 can rotate about its axis during the upward movement. As soon as the tappet head 17a has reached its highest position 17a ', the oil supply to the cylinder 18 is reversed in such a way that pressure oil flows out. As a result, the plunger head 17a falls down and is pulled by the spring 20 against the circumference of the wheel 15, so that it engages in a tooth surface 16a of the next tooth. With the aid of the plunger 17, the die 2 can thus also be rotated with respect to the press rollers 12 and can thus be released from a stuck position when the drive motor of the die is not sufficient to set the die in motion.

Claims (2)

1. A press for producing pellets from loose bulk material, which comprises an annular female die having a plurality of radial press channels and within it a coaxial, non-rotatable holder of press- rolls of which each by its circumference almost touches the die, characterised in that a wheel (15) is mounted on the shaft (5) of the die (2), which wheel (15) is provided with circumferential lugs or projections (16) whilst on the press housing (1) there is provided an hydraulic ram (17) which is movable in the plane of said wheel in opposition to spring loading in such a manner as to be capable of intermittently rotating the wheel by tangential thrust engaging in each case behind one of said lugs or projections (16).
2. A press according to Claim 1, characterised in that the lugs (16) of the wheel (15) are of saw tooth configuration and so directed that the ram (17) in each case engages with a short flank (16a) of the lug (16) which forms a hollow face.
EP84103035A 1983-04-09 1984-03-20 Press for producing pellets from bulk material Expired EP0127736B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103035T ATE19739T1 (en) 1983-04-09 1984-03-20 PRESS FOR PRODUCTION OF PELLETS FROM BULK MATERIAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3312787A DE3312787C1 (en) 1983-04-09 1983-04-09 Press for producing pellets from bulk material
DE3312787 1983-04-09

Publications (2)

Publication Number Publication Date
EP0127736A1 EP0127736A1 (en) 1984-12-12
EP0127736B1 true EP0127736B1 (en) 1986-05-14

Family

ID=6195841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103035A Expired EP0127736B1 (en) 1983-04-09 1984-03-20 Press for producing pellets from bulk material

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EP (1) EP0127736B1 (en)
AT (1) ATE19739T1 (en)
DE (1) DE3312787C1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034849A1 (en) * 1990-11-02 1991-09-19 Bayerische Motoren Werke Ag Fluid cell press with auxiliary work release mechanism - has powered winch that can be coupled to work feed tray of press
EP0699517A1 (en) * 1994-08-29 1996-03-06 Bühler Ag Feed pelleting press
CN117123140B (en) * 2023-10-26 2024-02-20 福建大昌盛饲料有限公司 Ultrahigh micro-granulation equipment for fish feed

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE101615C (en) *
HU179800B (en) * 1979-01-15 1982-12-28 Tatabanyai Szenbanyak Process for the mechanical digestion of green plant raw materials
DD141644A1 (en) * 1979-03-07 1980-05-14 Endler Karl Heinz PRESS ROLLER SYSTEM FOR FEED AGENT

Also Published As

Publication number Publication date
DE3312787C1 (en) 1984-02-16
EP0127736A1 (en) 1984-12-12
ATE19739T1 (en) 1986-05-15

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