WO1999052694A1 - Granulator for producing plastic pellets - Google Patents
Granulator for producing plastic pellets Download PDFInfo
- Publication number
- WO1999052694A1 WO1999052694A1 PCT/DE1999/001076 DE9901076W WO9952694A1 WO 1999052694 A1 WO1999052694 A1 WO 1999052694A1 DE 9901076 W DE9901076 W DE 9901076W WO 9952694 A1 WO9952694 A1 WO 9952694A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- knife
- perforated disc
- circumference
- blades
- granulator
- Prior art date
Links
- 229920000426 Microplastic Polymers 0.000 title claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
Definitions
- the invention relates to a granulator for the production of
- Granulators of the generic type which are designed in particular as underwater granulators, are from the
- the knives belonging to the prior art which rest with their cutting surface on a perforated disc and which allow an angle cut of the plastic strands emerging from extrusion bores in the perforated disc, require a larger contact surface than they do would be necessary for the attachment and arrangement of the actual extrusion holes.
- the invention has for its object to provide an arrangement with which it is possible to use a narrower perforated disk, which has a great influence on the overall temperature behavior of the perforated disk or to enable an additional row with the same size perforated disk as in the prior art of extrusion punches, so that the performance can be increased
- a certain knife shape provides a smaller cutting surface of the knife blades, which is more adapted to the absolutely necessary space for arranging the extrusion bores, and which fits the contact surface of the perforated disk.
- the particular one defined in the main claim The shape of the knife blades prevents the cutting surface from moving inwards towards the pivot point due to the inclined position of the knife blades. This behavior makes it possible to design the contact surface of the perforated disc to be narrower than is customary in the prior art.
- the knife blades designed according to the invention can also be turned, ie if one side is worn, the knife blade can be turned and inserted from the other side
- FIG. 2 shows the arrangement of the knife blades according to the proposal of the invention
- FIG. 3 a plan view of a first embodiment of the knife according to the invention
- FIG. 4 a side view of the knife to illustrate the cutting surfaces
- FIG. 1 and FIG. 2 1 denotes a perforated disk, on which a plurality of extrusion bores 5 can be seen, which mouth on the support surface 2 of the perforated disk 1.
- a knife carrier body
- Fig. 1 shows that the left knife blade 4 with its outer upper edge requires a large necessary support surface 2 of the perforated disc 1, but that after a certain standing time and thus wear and tear, the outer edge of the right knife blade 4 on the support surface 2 of the perforated disc 1 after hiked inside
- FIG. 2 shows the design according to the invention in a corresponding representation.
- a perforated disc 1 with extrusion bores 5 is provided, and here too the knife 4 shown on the left in the drawing is shown without wear and tear, while the right knife 4 is already worn and replaced with regard to its cutting surface
- the perforated disc 1 requires a much smaller contact surface 2, as is shown in particular by a comparison with FIG. 1
- the outer knife edge 7 is cut to match the outer radius of the support surface 2 of the perforated disk 1, and the inner knife edge 8 is also undercut to adapt to the wear that occurs during operation of the knife blade 4
- the knife blades 4 are symmetrical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
The invention relates to a granulator for producing plastic pellets, comprising exchangeable knife blades. The blade edges are adjusted to fit the circumference of the perforated disk.
Description
"Granulator zur Herstellung von Pellets aus Kunststoff""Granulator for the production of plastic pellets"
Die Erfindung bezieht sich auf einen Granulator zur Herstellung vonThe invention relates to a granulator for the production of
Pellets aus Kunststoff gemäß dem Oberbegriff des HauptanspruchesPlastic pellets according to the preamble of the main claim
Granulatoren der gattungsbildenden Art, die insbesondere als Un- terwassergranulatoren ausgebildet sind, sind aus derGranulators of the generic type, which are designed in particular as underwater granulators, are from the
DE-A-196 42 389 und der US-A-53 30 340 bekanntDE-A-196 42 389 and US-A-53 30 340 are known
Wie die Fig 1 (Prior art) zur vorliegenden Anmeldung zeigt, benotigen die zum Stand der Technik gehörenden Messer, die mit ihrer Schneidflache auf einer Lochscheibe aufliegen und einen Winkel- schnitt der aus Extrusionsbohrungen in der Lochscheibe austretenden Kunststoffstrangen ermöglichen, eine größere Auflageflache als sie für die Anbringung und Anordnung der eigentlichen Extrusionsbohrungen notwendig wäre Da der Messerkopf mittels Handverstel- lung, Federkraft oder hydraulisch auf die Lochscheibe aufgepreßt wird, nutzen sich die Messerklingen im Betrieb ab und aufgrund der Schragstellung der Messerklingen wandert die Schneidflache der Messerklingen nach innen zum Drehpunkt des Messertragerkorpers hm Dieses Verhalten macht es erforderlich, größere Messer als un- bedingt notwendig einzusetzen und die Lochscheibe ebenfalls größer auszubilden, als es eigentlich für die Anordnung der Ex- trusionslocher notwendig wäre
Der Erfindung hegt die Aufgabe zugrunde, eine Anordnung zu schaffen, mit der es möglich wird, eine schmalere Lochscheibe einzusetzen, welches großen Einfluß auf das gesamte Temperaturverhalten der Lochscheibe hat bzw es zu ermöglichen, bei gleich großer Lochscheibe wie im Stand der Technik eine zusätzliche Reihe von Extrusionslochern anzubringen, so daß dadurch die Leistung erhöht werden kannAs shown in FIG. 1 (prior art) to the present application, the knives belonging to the prior art, which rest with their cutting surface on a perforated disc and which allow an angle cut of the plastic strands emerging from extrusion bores in the perforated disc, require a larger contact surface than they do would be necessary for the attachment and arrangement of the actual extrusion holes. Since the cutter head is pressed onto the perforated disc by means of manual adjustment, spring force or hydraulically, the cutter blades wear during operation and due to the inclined position of the cutter blades, the cutting surface of the cutter blades moves inwards to the pivot point of the Knife holder body hm This behavior makes it necessary to use larger knives than absolutely necessary and also to make the perforated disk larger than would actually be necessary for the arrangement of the extrusion punches The invention has for its object to provide an arrangement with which it is possible to use a narrower perforated disk, which has a great influence on the overall temperature behavior of the perforated disk or to enable an additional row with the same size perforated disk as in the prior art of extrusion punches, so that the performance can be increased
Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelostThis object on which the invention is based is achieved by the teaching of the main claim
Vorteilhafte Ausgestaltungen sind in den Unteranspruchen erläutertAdvantageous embodiments are explained in the subclaims
Mit anderen Worten ausgedruckt, wird vorgeschlagen, daß durch ei- ne bestimmte Messerform schon von vornherein eine kleinere, mehr den unbedingt notwendigen Raum zur Anordnung der Extrusions- bohrungen angepaßte Schneidflache der Messerklingen vorgesehen wird, die der Auflageflache der Lochscheibe anliegt Die im Hauptanspruch definierte besondere Form der Messerklingen verhindert, daß aufgrund der Schragstellung der Messerklingen die Schneidflache nach innen zum Drehpunkt wandert Dieses Verhalten macht es möglich, die Auflageflache der Lochscheibe schmaler zu konstruieren als im Stand der Technik üblich Hierbei können die erfindungs- gemaß ausgebildeten Messerklingen ebenfalls gewendet werden, d h wenn eine Seite abgenutzt ist, kann die Messerklinge gewendet werden und von der anderen Seite eingesetzt werdenIn other words, it is suggested that a certain knife shape provides a smaller cutting surface of the knife blades, which is more adapted to the absolutely necessary space for arranging the extrusion bores, and which fits the contact surface of the perforated disk. The particular one defined in the main claim The shape of the knife blades prevents the cutting surface from moving inwards towards the pivot point due to the inclined position of the knife blades. This behavior makes it possible to design the contact surface of the perforated disc to be narrower than is customary in the prior art. The knife blades designed according to the invention can also be turned, ie if one side is worn, the knife blade can be turned and inserted from the other side
Wie die Unteranspruche zeigen, sind zumindest zwei Ausbildungen der Messerklingen möglich, die die Lehre des Hauptanspruches verwirklichen, nämlich einmal kann die äußere Messerkante und die innere Messerkante so abgeschnitten sein, daß die Vorschrift des Hauptanspruches verwirklicht wird Gemäß den Unteranspruchen wird weiterhin vorgeschlagen, daß entweder die äußere bzw innere Messerkante abgerundet ausgebildet ist oder die äußere bzw innere Messerkante als Tangente an den Kreisumfang der Lochscheibe ausgebildet ist
Ein Ausfuhrungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen erläutert In den Zeichnungen zeigtAs the subclaims show, at least two designs of the knife blades are possible which realize the teaching of the main claim, namely once the outer knife edge and the inner knife edge can be cut off in such a way that the regulation of the main claim is realized. According to the subclaims, it is further proposed that either the outer or inner knife edge is rounded or the outer or inner knife edge is designed as a tangent to the circumference of the perforated disk An exemplary embodiment of the invention is explained below with reference to the drawings. The drawings show
Fig 1 eine Anordnung wie sie zum Stand der Technik ge- hört, in1 shows an arrangement as it belongs to the prior art, in
Fig 2 die Anordnung der Messerklingen gemäß dem Vorschlag der Erfindung, in Fig 3 eine Draufsicht auf eine erste Ausfuhrungsform des erfindungsgemaßen Messers und in Fig 4 eine Seitenansicht auf das Messer zur Verdeutlichung der Schneidflachen2 shows the arrangement of the knife blades according to the proposal of the invention, in FIG. 3 a plan view of a first embodiment of the knife according to the invention and in FIG. 4 a side view of the knife to illustrate the cutting surfaces
In Fig 1 und Fig 2 ist mit 1 eine Lochscheibe bezeichnet, auf der eine Vielzahl von Extrusionsbohrungen 5 erkennbar sind, die an der Auflageflache 2 der Lochscheibe 1 munden Ein MessertragerkorperIn FIG. 1 and FIG. 2, 1 denotes a perforated disk, on which a plurality of extrusion bores 5 can be seen, which mouth on the support surface 2 of the perforated disk 1. A knife carrier body
6 tragt Messerklingen 4, wobei bei der Darstellung in Fig 1 und in Fig 2 die linke Messerklinge 4 noch keinen Verschleiß aufweist, wahrend die rechte Messerklinge 4 bereits hinsichtlich ihrer vorderen Schneidflache verschlissen ist6 carries knife blades 4, the left knife blade 4 not yet showing any wear in the illustration in FIG. 1 and FIG. 2, while the right knife blade 4 is already worn with regard to its front cutting surface
Fig 1 zeigt, daß die linke Messerklinge 4 mit ihrem äußeren oberen Rand eine große notwendige Auflageflache 2 der Lochscheibe 1 benotigt, daß aber nach einer gewissen Standzeit und damit erfolgtem Verschleiß nunmehr der äußere Rand der rechten Messerklinge 4 auf der Auflageflache 2 der Lochscheibe 1 nach innen gewandert istFig. 1 shows that the left knife blade 4 with its outer upper edge requires a large necessary support surface 2 of the perforated disc 1, but that after a certain standing time and thus wear and tear, the outer edge of the right knife blade 4 on the support surface 2 of the perforated disc 1 after hiked inside
Die Fig 2 zeigt in entsprechender Darstellungsweise die erfindungs- gemaße Gestaltung Auch hier ist eine Lochscheibe 1 mit Extrusionsbohrungen 5 vorgesehen und auch hier ist das in der Zeichnung links dargestellte Messer 4 verschleißlos dargestellt, wahrend das rechte Messer 4 bereits hinsichtlich seiner Schneidflache verschlissen ist und gewechselt werden mußte Es ist ohne weiteres erkennbar, daß die Lochscheibe 1 eine wesentlich kleinere Auflageflache 2 benotigt, wie dies insbesondere auch ein Vergleich mit Fig 1 zeigt
Bei der in Fig 3 dargestellten Messerklinge 4 ist die äußere Messerkante 7 in Anpassung an den äußeren Radius der Auflageflache 2 der Lochscheibe 1 abgeschnitten und auch die innere Messerkante 8 ist in Anpassung an die im Betrieb der Messerklinge 4 auftretende Verschleißerscheinung hinterschnitten2 shows the design according to the invention in a corresponding representation. Here too, a perforated disc 1 with extrusion bores 5 is provided, and here too the knife 4 shown on the left in the drawing is shown without wear and tear, while the right knife 4 is already worn and replaced with regard to its cutting surface It is readily apparent that the perforated disc 1 requires a much smaller contact surface 2, as is shown in particular by a comparison with FIG. 1 In the knife blade 4 shown in FIG. 3, the outer knife edge 7 is cut to match the outer radius of the support surface 2 of the perforated disk 1, and the inner knife edge 8 is also undercut to adapt to the wear that occurs during operation of the knife blade 4
Von einer Mittellinie M - M ausgehend sind die Messerklingen 4 symmetrisch ausgebildetStarting from a center line M - M, the knife blades 4 are symmetrical
Als reines Beispiel sei darauf hingewiesen, daß bei der zum Stand der Technik gehörenden, in Fig 1 dargestellten Anordnung, die notwendige Auflageflache 2 für zum Stand der Technik gehörende Messer z B 6 482 mm2 betragt, wahrend die gesamte notwendige Auflageflache 2 gemäß Fig 2 für die gemäß der Erfindung geform- ten Messer nur 4 822 mm2 betragt
As a pure example, it should be noted that in the arrangement belonging to the prior art, shown in FIG. 1, the necessary contact surface 2 for knives belonging to the prior art, e.g. 6 482 mm 2 , while the entire necessary contact surface 2 according to FIG. 2 for the knives shaped according to the invention is only 4 822 mm 2
Claims
Patentansprücheclaims
1 Granulator zur Herstellung von Pellets aus Kunststoff mit einer vor einer Extruderduse angeordneten, mit Extrusions- bohrungen (5) versehenen, kreisπngformigen Lochscheibe (1 ), auf deren Auflageflache (2) die Schneidflachen (3) von auswechselbaren Messerklingen (4) aufliegen, die von einem drehbaren Messerkorpertrager (6) getragen sind, wobei die Messerklingen (4) gegenüber den aus den Extrusionsbohrungen (5) austretenden Kunststoffilamenten einen Winkelschnitt ermöglichen, dadurch gekennzeichnet, daß im eingebauten Zustand der Messerklingen (4) wenigstens die äußere Messerkante (7) dem Kreisumfang der Lochscheibe (1 ) angepaßt ist1 granulator for the production of plastic pellets with a circular perforated disc (1) arranged in front of an extruder nozzle and provided with extrusion bores (5), on the bearing surface (2) of which the cutting surfaces (3) of exchangeable knife blades (4) rest are carried by a rotatable knife body support (6), the knife blades (4) making an angular cut possible with respect to the plastic filaments emerging from the extrusion bores (5), characterized in that in the installed state of the knife blades (4) at least the outer knife edge (7) Circumference of the perforated disc (1) is adjusted
2 Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die äußere Messerkante (7) zum Außendurchmesser der Lochscheibe (1 ) abgerundet ausgebildet ist2 Device according to claim 1, characterized in that the outer knife edge (7) to the outer diameter of the perforated disc (1) is rounded
3 Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß die äußere angepaßte Messerkante (7) als Tangente an den äußeren Kreisumfang der Lochscheibe (1 ) ausgebildet ist3 Device according to claim 1, characterized in that the outer adapted knife edge (7) is designed as a tangent to the outer circumference of the perforated disc (1)
4 Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß auch die innere Messerkante (8) dem Kreisumfang der Loch- scheibe (1 ) angepaßt und zum Innendurchmesser der Lochscheibe (1 ) abgerundet oder als Tangente an den inneren Kreisumfang der Lochscheibe (1 ) ausgebildet ist4 Device according to claim 1, characterized in that the inner knife edge (8) is adapted to the circumference of the perforated disc (1) and rounded to the inside diameter of the perforated disc (1) or is formed as a tangent to the inner circumference of the perforated disc (1)
5 Vorrichtung nach einem der vorhergehenden Ansprüche, d ; durch gekennzeichnet, daß von der Mittellinie (M-M) ausgehend die Messerklingen (4) symmetrisch ausgebildet sind
5 Device according to one of the preceding claims, d; characterized in that, starting from the center line (M-M), the knife blades (4) are symmetrical
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19816611.7 | 1998-04-15 | ||
DE19816611A DE19816611A1 (en) | 1998-04-15 | 1998-04-15 | Granulator for the production of plastic pellets |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999052694A1 true WO1999052694A1 (en) | 1999-10-21 |
Family
ID=7864554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/001076 WO1999052694A1 (en) | 1998-04-15 | 1999-04-03 | Granulator for producing plastic pellets |
Country Status (2)
Country | Link |
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DE (1) | DE19816611A1 (en) |
WO (1) | WO1999052694A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10106677C1 (en) * | 2001-02-14 | 2002-10-02 | Werner Arnheiter | Granulator especially suitable for plastic strands, has roller stripper fixed resiliently to counter-blade carrier |
DE102004049862B4 (en) | 2004-10-13 | 2013-08-01 | Automatik Plastics Machinery Gmbh | Knife rotor for granulating plastic strands |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1065036A (en) * | 1964-07-24 | 1967-04-12 | Frank W Egan & Company | Underwater pelletizer |
US4123207A (en) * | 1976-03-29 | 1978-10-31 | Gala Industries, Inc. | Underwater pelletizer and heat exchanger die plate |
US4179255A (en) * | 1978-03-13 | 1979-12-18 | E. I. Du Pont De Nemours And Company | Melt cutter apparatus |
US4251198A (en) * | 1979-04-27 | 1981-02-17 | Gala Industries, Inc. | Cutter hub with replaceable knife blades for underwater pelletizer |
US4300877A (en) * | 1979-01-10 | 1981-11-17 | Sterling Extruder Corp. | Underwater pelletizer |
US4529370A (en) * | 1981-11-09 | 1985-07-16 | Thomas R. Vigil | Pelletizer |
US5146831A (en) * | 1991-09-30 | 1992-09-15 | The Conair Group, Inc. | Quick release cutting hub assembly |
EP0565119A1 (en) * | 1992-04-09 | 1993-10-13 | The Japan Steel Works, Ltd. | Cutter holder device in a pelletizer |
US5330340A (en) * | 1992-03-25 | 1994-07-19 | The Black Clawson Company | Pelletizer with automatic knife adjustment |
US5587186A (en) * | 1993-09-11 | 1996-12-24 | Herman Berstorff Maschinenbau Gmbh | Apparatus for pelletizing plastics |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5052911A (en) * | 1989-04-27 | 1991-10-01 | Mikeska Olvin J | Underwater pelletizer blade |
-
1998
- 1998-04-15 DE DE19816611A patent/DE19816611A1/en not_active Withdrawn
-
1999
- 1999-04-03 WO PCT/DE1999/001076 patent/WO1999052694A1/en unknown
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1065036A (en) * | 1964-07-24 | 1967-04-12 | Frank W Egan & Company | Underwater pelletizer |
US4123207A (en) * | 1976-03-29 | 1978-10-31 | Gala Industries, Inc. | Underwater pelletizer and heat exchanger die plate |
US4179255A (en) * | 1978-03-13 | 1979-12-18 | E. I. Du Pont De Nemours And Company | Melt cutter apparatus |
US4300877A (en) * | 1979-01-10 | 1981-11-17 | Sterling Extruder Corp. | Underwater pelletizer |
US4251198A (en) * | 1979-04-27 | 1981-02-17 | Gala Industries, Inc. | Cutter hub with replaceable knife blades for underwater pelletizer |
US4529370A (en) * | 1981-11-09 | 1985-07-16 | Thomas R. Vigil | Pelletizer |
US5146831A (en) * | 1991-09-30 | 1992-09-15 | The Conair Group, Inc. | Quick release cutting hub assembly |
US5330340A (en) * | 1992-03-25 | 1994-07-19 | The Black Clawson Company | Pelletizer with automatic knife adjustment |
EP0565119A1 (en) * | 1992-04-09 | 1993-10-13 | The Japan Steel Works, Ltd. | Cutter holder device in a pelletizer |
US5587186A (en) * | 1993-09-11 | 1996-12-24 | Herman Berstorff Maschinenbau Gmbh | Apparatus for pelletizing plastics |
Also Published As
Publication number | Publication date |
---|---|
DE19816611A1 (en) | 1999-10-21 |
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