DE102007015541A1 - Submerged perforated plate, for extruded molten plastics into a water bath to be chopped into granules, has a body with a wear protection layer and electric heating at the extrusion channels - Google Patents
Submerged perforated plate, for extruded molten plastics into a water bath to be chopped into granules, has a body with a wear protection layer and electric heating at the extrusion channels Download PDFInfo
- Publication number
- DE102007015541A1 DE102007015541A1 DE102007015541A DE102007015541A DE102007015541A1 DE 102007015541 A1 DE102007015541 A1 DE 102007015541A1 DE 102007015541 A DE102007015541 A DE 102007015541A DE 102007015541 A DE102007015541 A DE 102007015541A DE 102007015541 A1 DE102007015541 A1 DE 102007015541A1
- Authority
- DE
- Germany
- Prior art keywords
- perforated plate
- protection layer
- wear protection
- plate according
- heating
- 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.)
- Withdrawn
Links
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
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
-
- 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
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/582—Component parts, details or accessories; Auxiliary operations for discharging, e.g. doors
-
- 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
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/82—Heating or cooling
- B29B7/826—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
Abstract
Description
Die Erfindung betrifft einen Unterwassergranulierer und insbesondere eine Lochplatte dafür.The The invention relates to an underwater granulator and in particular a perforated plate for it.
Unterwassergranulierer dienen zur Herstellung von Kunststoffgranulat. Dazu wird der Kunststoff mittels eines Extruders aufgeschmolzen und durch eine Lochplatte hindurch in eine Wasserkammer gepresst. In der Lochplatte wird der Kunststoffschmelzestrom in eine Anzahl von Teilströmen aufgeteilt und tritt auf einer Stirnseite der Lochplatte durch eine entsprechende Anzahl von Düsenkanälen in die Wasserkammer ein. Mittels eines rotierenden Messerkopfes werden die aus den Düsenkanälen austretenden Kunststoffstränge sukzessive durchtrennt, und das so entstehende Kunststoffgranulat wird mit dem die Wasserkammer durchströmenden Kühlwasser abgeführt. Zum Schutz der Austrittsoberfläche der Lochplatte vor Verschleiß durch den darüber gleitenden Messerkopf dient eine Verschleißschutzschicht, die durchgehend oder für jeden Düsenkanalaustritt separat vorgesehen sein kann.Unterwassergranulierer used for the production of plastic granules. For this, the plastic by means of an extruder melted and through a perforated plate pressed into a water chamber. In the perforated plate of the plastic melt stream divided into a number of sub-streams and occurs a front side of the perforated plate by a corresponding number from nozzle channels into the water chamber. through of a rotating cutter head are those from the nozzle channels successively separated plastic strands, and the resulting plastic granules become with the the water chamber discharged cooling water. To protect the exit surface of the perforated plate from wear the blade head sliding over it serves a wear protection layer, the continuous or for each nozzle channel outlet can be provided separately.
Die Temperatur am Düsenkanalaustritt ist von besonderer Bedeutung. Denn die aus den Düsen austretende Kunststoffschmelze darf erst nach dem Herausfließen erstarren. Ein Erstarren der Schmelze bereits in den Düsenkanälen verursacht einen ungleichmäßigen Schmelzefluss oder sogar die Unterbrechung des Schmelzeflusses und führt dadurch zu Störungen, so dass gegebenenfalls die gesamte Granulieranlage abgeschaltet werden muss. Dieses auch als „Einfrieren" bezeichnete Phänomen ist unbedingt zu vermeiden. Im Stand der Technik sind unterschiedliche Lösungen beschrieben, um die Kunststoffschmelze in den Düsenkanälen so zu führen, dass deren Ober fläche praktisch bis zum Düsenkanalaustritt Schmelzetemperatur aufweist. Die Lochplatten sind dazu in der Regel beheizt, wobei sowohl elektrische Beheizung als auch Fluidbeheizung bekannt sind.The Temperature at the nozzle channel outlet is of particular importance. Because the plastic melt emerging from the nozzles may only solidify after flowing out. A freezing of the Melt already caused in the nozzle channels an uneven melt flow or even the interruption of the melt flow and thereby leads to disruptions, so possibly the entire granulating plant must be switched off. This also called "freezing" This phenomenon must be avoided at all costs. In the state different solutions are described in the art, around the plastic melt in the nozzle channels to guide so that its upper surface practically has melt temperature until the nozzle channel outlet. The perforated plates are usually heated to this, with both electrical Heating and fluid heating are known.
In
der
In
der
Kombinationen
einer Fluidbeheizung und Luftspaltisolierung sind beispielsweise
aus
Anstelle
eines Luft- oder Vakuumisolierspalts können auch Isolationsschichten
vorgesehen sein, die in der Regel aus Keramikwerkstoffen bestehen (
Nachteilhaft an dem vorbeschriebenen Stand der Technik ist, dass darin die Wärme relativ weit entfernt von dem Ort bereitgestellt wird, an welchem sie benötigt wird. Das heißt, Wärmequelle und Wärmesenke liegen relativ weit auseinander. Der Wärmetransport durch den stählernen Grundkörper der Lochplatte zur Schneidfläche erfordert hohe Heizleistungen, um zu erreichen, dass die notwendige Wärmemenge bis zur Schneidfläche fließt, an der das Einfrieren der Kunststoffschmelze in den engen Düsenkanalaustritten zu verhindern ist. Außerdem werden Bereiche der Lochplatte beheizt, welche an sich keine Wärme benötigen. Es entstehen daher unnötige Wärmeverluste, da auch über weite Flächen der Lochplattenstirnseite Wärme an das Kühlwasser der angrenzenden Wasserkammer abgegeben wird, beispielsweise über die Kreisfläche innerhalb der üblicherweise ringförmig angeordneten Düsen.disadvantageous in the above-described prior art, that is the heat therein is provided relatively far from the location at which she is needed. That is, heat source and heat sink are relatively far apart. The heat transport through the steel base of the perforated plate To the cutting surface requires high heating power in order to Achieve that necessary amount of heat up to the cutting surface flows, at which the freezing of the plastic melt in to prevent the narrow nozzle duct exits. In addition, will Areas of the perforated plate heated, which in itself no heat need. There are therefore unnecessary heat losses, as well over wide areas of the perforated plate front side Heat to the cooling water of the adjacent water chamber is discharged, for example, over the circular area within the usually arranged in a ring Nozzles.
Aufgabe der vorliegenden Erfindung ist es daher, die Temperierung einer Lochplatte dahingehend zu optimieren, dass die zugeführte Wärmeenergie zuverlässig und überwiegend im Bereich der Düsenkanalaustritte zur Verfügung steht.task The present invention is therefore, the temperature of a To optimize the perforated plate to the effect that the supplied Heat energy reliable and predominant in the area of the nozzle channel outlets available stands.
Diese Aufgabe wird durch eine Lochplatte mit den Merkmalen des Anspruchs 1 gelöst. In davon abhängigen Ansprüchen sind vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung angegeben.These Task is through a perforated plate with the features of the claim 1 solved. In dependent claims are advantageous embodiments and developments of the invention specified.
Dementsprechend ist zwischen dem Grundkörper und der Verschleißschutzschicht angrenzend an die Verschleißschutzschicht eine die Düsenkanäle umgebende elektrische Heizeinrichtung, beispielsweise in Gestalt einer Induktionsheizeinrichtung oder vorzugsweise als Widerstandsheizeinrichtung, vorgesehen. Dadurch wird vermieden, dass überflüssige Wärme in die Lochplatte fließt, denn die Wärme wird unmittelbar dort zur Verfügung ge stellt, wo sie benötigt wird. Ergänzend können andere Bereiche der wasserkammerseitigen Lochplattenoberfläche, insbesondere der innerhalb des Düsenkranzes liegende zentrale Lochplattenbereich, mittels Isolierschichten und/oder Luft-/Vakuumisolierkammern dagegen geschützt werden, dass Wärme von der Lochplatte zum Kühlwasser der Wasserkammer abfließt. Lediglich über die Schneidfläche fließt dann Wärme ins Kühlwasser. Dies lässt sich nur durch eine geeignete Werkstoffauswahl für die Verschleißfläche weiter optimieren, welche dementsprechend einen hohen Verschleißwiderstand bei geringer Wärmeleitfähigkeit haben muss. Die Verschleißschicht besteht daher vorzugsweise aus keramischem Material, welches durch geeignete Werkstoffauswahl bei möglichst gleich bleibend hohem Verschleißwiderstand hinsichtlich Wärmeisolierungseigenschaften optimiert ist, oder aus Metallen oder Metallverbänden mit unterschiedlichen Wärmeleitkoeffizienten aber hohen Härten zumindest in der äußeren Schicht, z. B. Ferrotitanit.Accordingly, an electric heating device surrounding the nozzle channels, for example in the form of an induction heater or preferably as a resistance heater, is provided between the base body and the wear protection layer adjacent to the wear protection layer. This prevents excess heat from flowing into the perforated plate, because the heat is made available right where it is needed is taken. In addition, other regions of the water chamber-side perforated plate surface, in particular the central perforated plate region located inside the nozzle ring, can be protected by means of insulating layers and / or air / vacuum isolating chambers so that heat flows from the perforated plate to the cooling water of the water chamber. Only over the cutting surface then heat flows into the cooling water. This can be further optimized only by a suitable choice of material for the wear surface, which accordingly must have a high wear resistance with low thermal conductivity. The wear layer is therefore preferably made of ceramic material, which is optimized by suitable choice of materials with as consistently high wear resistance in terms of thermal insulation properties, or metals or metal composites with different heat transfer coefficients but high hardness at least in the outer layer, eg. B. ferrotitanite.
Die Widerstandsheizeinrichtung kann in einfacher Weise ein oder mehrere Heizdrähte umfassen, die nahe an den Düsenkanälen vorbei und/oder um die Düsenkanäle herumgeführt sind. Eine derartige Heizeinrichtung nimmt wenig Platz ein, insbesondere in Richtung des Schmelzedurchtritts durch die Lochplatte, wenn die Heizdrähte in wenigen und vorzugsweise nur einer einzelnen Ebene verlegt sind. In einer bevorzugten Ausgestaltung werden die Heizdrähte unmittelbar auf dem Grundkörper oder unmittelbar auf der Verschleißschutzschicht aufgebracht. Diese Anbringung ist besonders effektiv und platzsparend.The Resistance heater can easily one or more Include heating wires that are close to the nozzle channels over and / or around the nozzle channels are. Such a heater takes up little space, in particular in the direction of the passage of melt through the perforated plate when the Heating wires in a few and preferably only a single Level are misplaced. In a preferred embodiment, the Heating wires directly on the main body or applied directly on the wear protection layer. These Attachment is particularly effective and saves space.
Besonders vorteilhaft ist es in diesem Fall, flache, breite Heizdrähte vorzusehen, welche in einfacher Weise beispielsweise aufgedampft werden können. Der individuellen Verlegung der Heizdrähte sind dabei kaum Grenzen ge setzt. Es kann auch eine durchgehende, kreisförmige Metallschicht mit entsprechenden Durchtrittsöffnungen für die Düsenkanäle als elektrisches Widerstandsheizelement verlegt oder aufgedampft werden.Especially It is advantageous in this case, flat, wide heating wires provide, which in a simple manner, for example, vapor-deposited can be. The individual laying of the heating wires are There are hardly any limits. It can also be a continuous, circular Metal layer with corresponding openings for the nozzle channels as an electrical resistance heating element be laid or evaporated.
Das Flächenheizelement kann auch aus unterschiedlichen Schichten aufgebaut sein, um beispielsweise den Wärmefluss nur in eine Richtung zu lenken.The Surface heating element can also be made of different layers be constructed, for example, the heat flow only in to direct a direction.
Insbesondere kann es vorteilhaft sein, die Widerstandsheizeinrichtung als separates Flächenheizelement auszuführen, welches selbständig handhabbar ist und an den notwendigen Stellen Durchtrittsöffnungen für die Düsenkanäle besitzt. Ein solches separates Flächenheizelement lässt sich leicht austauschen, wobei es vorzugsweise unabhängig von der Verschleißschutzschicht austauschbar ist. Zu diesem Zwecke ist das Flächenheizelement und vorzugsweise auch die Verschleißschutzschicht jeweils als plattenförmiges, insbesondere als ringplattenförmiges Bauelement ausgebildet.Especially It may be advantageous, the resistance heater as a separate To perform surface heating, which independently is manageable and at the necessary points passages owns for the nozzle channels. Such a separate one Surface heating element is easy to replace, it is preferably independent of the wear protection layer is interchangeable. For this purpose, the surface heating element and preferably also the wear protection layer in each case as plate-shaped, in particular as a ring plate-shaped Component formed.
Die Ausbildung des Flächenheizelements als separates Bauelement hat den weiteren Vorteil, dass die Heizeigenschaften individuell eingestellt werden können. So kann das Flächenheizelement einen Keramikkörper umfassen, in dem die Heizdrähte eingeschlossen sind, wobei der Keramikkörper mit einer hohen thermischen Leitfähigkeit ausgelegt ist, um eine gleichförmige Temperaturverteilung innerhalb des Flächenheizelements zu erzielen. Derartige individuell auslegbare Keramik-Heizelemente sind beispielsweise unter der Bezeichnung ULTRAMIC 600 der Firma Watlow GmbH/Kronau bekannt. Diese Heizelemente sind in einer Dicke zwischen 2 und 5 mm erhältlich, besitzen einen Keramikkörper aus Aluminiumnitrid-Pulver (AIN) und können komplexe Topographien wie Bohrungen, Ausschnitte und Vakuumnuten aufweisen. Auch Ringformen sind möglich, so dass sich derartige Heizele mente besonders für den beschränkten Einsatz im Bereich der ringförmig angeordneten Düsenkanalaustrittsenden eignen. Die damit erzielbare Oberflächentemperatur wird mit maximal 600°C angegeben und ist daher im Zusammenhang mit der Kunststoffbearbeitung universell einsetzbar.The Formation of the surface heating element as a separate component has the further advantage that the heating properties are individual can be adjusted. So can the surface heating element a ceramic body, in which the heating wires are included, wherein the ceramic body with a high thermal conductivity is designed to be uniform Temperature distribution within the surface heating element to achieve. Such customizable ceramic heating elements are for example under the name ULTRAMIC 600 of the company Watlow GmbH / Kronau known. These heating elements are in a thickness Available between 2 and 5 mm, have a ceramic body made of aluminum nitride powder (AIN) and can complex topographies as have holes, cutouts and vacuum grooves. Also ring shapes are possible, so that such Heizele elements particularly for limited use in the field of annular arranged nozzle duct exit ends are suitable. The so achievable surface temperature is a maximum of 600 ° C indicated and is therefore in connection with the plastic processing universally applicable.
Nachfolgend wird die Erfindung beispielhaft anhand der begleitenden Zeichnungen erläutert. Darin zeigen:following the invention will be described by way of example with reference to the accompanying drawings explained. Show:
Im
Betrieb der Lochplatte strömt Kunststoffschmelze durch
die Düsenkanäle
Schließlich
besitzt die Lochplatte des weiteren kunststoffaustrittseitig einen
radial äußeren Ringflansch
Die
Widerstandsheizeinrichtung
Öffnungen
Der
Schmelzedurchfluss durch das plattenförmige Flächenheizelement
Das
Flächenheizelement
Insgesamt
lässt sich mittels der vorbeschriebenen Lochplatte eine
gleichmäßig hohe Temperatur an der äußeren
Schneidfläche der Verschleißschutzschicht
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10002408 [0004] - DE 10002408 [0004]
- - DE 19962036 A1 [0005] - DE 19962036 A1 [0005]
- - DE 3243332 A1 [0005] - DE 3243332 A1 [0005]
- - DE 19811089 A1 [0006] - DE 19811089 A1 [0006]
- - DE 3532937 A1 [0006] - DE 3532937 A1 [0006]
- - DE 2349273 A [0006, 0006] - DE 2349273 A [0006, 0006]
- - DE 19515473 A1 [0007] DE 19515473 A1 [0007]
- - EP 0246921 A2 [0007] EP 0246921 A2 [0007]
- - EP 1413413 A1 [0007] EP 1413413 A1 [0007]
Claims (13)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007015541A DE102007015541A1 (en) | 2007-03-30 | 2007-03-30 | Submerged perforated plate, for extruded molten plastics into a water bath to be chopped into granules, has a body with a wear protection layer and electric heating at the extrusion channels |
AT0050108A AT507443B1 (en) | 2007-03-30 | 2008-03-31 | NOZZLE PLATE FOR UNDERWATER GRANULAR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007015541A DE102007015541A1 (en) | 2007-03-30 | 2007-03-30 | Submerged perforated plate, for extruded molten plastics into a water bath to be chopped into granules, has a body with a wear protection layer and electric heating at the extrusion channels |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007015541A1 true DE102007015541A1 (en) | 2008-10-02 |
Family
ID=39719542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007015541A Withdrawn DE102007015541A1 (en) | 2007-03-30 | 2007-03-30 | Submerged perforated plate, for extruded molten plastics into a water bath to be chopped into granules, has a body with a wear protection layer and electric heating at the extrusion channels |
Country Status (2)
Country | Link |
---|---|
AT (1) | AT507443B1 (en) |
DE (1) | DE102007015541A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009011495A1 (en) * | 2009-03-06 | 2010-09-09 | Von Ardenne Anlagentechnik Gmbh | Method for the continuous treatment of a flat substrate in a vacuum comprises heating the substrate within a flow resistor using heat radiation from the wall of the resistor |
DE102010023826A1 (en) * | 2010-06-15 | 2011-12-15 | Automatik Plastics Machinery Gmbh | Perforated plate i.e. granulation perforated plate, for use in granular head of extruder of granulation device to granulate e.g. polyamide, has functional element arranged in area of orifices and clamped against body via clamping element |
WO2012095125A1 (en) * | 2011-01-11 | 2012-07-19 | Automatik Plastics Machinery Gmbh | Perforated plate |
DE102012002294A1 (en) * | 2012-02-07 | 2013-08-08 | Automatik Plastics Machinery Gmbh | Perforated plate of a granulator useful for a molten material e.g. thermoplastic plastics material, comprises a melt passage or channel extending in the granulator, and nozzle openings including a respective melt outlet region |
DE102021205606A1 (en) | 2021-06-02 | 2022-12-08 | Lean Plastics Technologies GmbH | Extrusion tool and process for underwater granulation |
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---|---|---|---|---|
DE2349273A1 (en) | 1972-10-20 | 1974-05-02 | Plast Elastverarbeitungsmasch | Graining swage block - for underwater granulating of thermoplastic material with improved temp control of block |
DE3243332A1 (en) | 1982-07-15 | 1984-01-26 | Gala Industries, Inc., 24085 Virginia | Extrusion die |
DE3532937A1 (en) | 1985-09-14 | 1987-04-02 | Werner & Pfleiderer | HOLE PLATE FOR UNDERWATER PELLETIZATION OF PLASTIC STRINGS |
EP0246921A2 (en) | 1986-05-22 | 1987-11-25 | Rogers Tool Works, Inc. | Internally insulated extrusion die |
DE19515473A1 (en) | 1995-04-27 | 1996-10-31 | Werner & Pfleiderer | Underwater pelletizing plate with wear protection layer |
DE19811089A1 (en) | 1997-03-28 | 1998-10-01 | Japan Steel Works Ltd | Synthetic resin granulating die ring |
DE19962036A1 (en) | 1999-12-22 | 2001-06-28 | Krupp Werner & Pfleiderer Gmbh | Perforated plate for a granulating device |
DE10002408A1 (en) | 1999-12-24 | 2001-07-12 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Extruder plate for submerged granulator for producing plastic granules has conical extension, is fitted with heaters and contains cavity which is separated from cutter chamber by partition wall and is filled with insulator |
EP1413413A1 (en) | 2002-10-22 | 2004-04-28 | Gerhard Hehenberger | Die for granulation |
WO2005044532A2 (en) * | 2003-11-05 | 2005-05-19 | Starlinger & Co Gesellschaft M.B.H. | Device and method for granulation of materials with thermoplastic properties and granulating die plate for arrangement in such a granulation device |
DE102005021544A1 (en) * | 2004-05-10 | 2005-12-15 | The Japan Steel Works, Ltd. | Method and apparatus for heating a plastic extrusion mold |
-
2007
- 2007-03-30 DE DE102007015541A patent/DE102007015541A1/en not_active Withdrawn
-
2008
- 2008-03-31 AT AT0050108A patent/AT507443B1/en not_active IP Right Cessation
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2349273A1 (en) | 1972-10-20 | 1974-05-02 | Plast Elastverarbeitungsmasch | Graining swage block - for underwater granulating of thermoplastic material with improved temp control of block |
DE3243332A1 (en) | 1982-07-15 | 1984-01-26 | Gala Industries, Inc., 24085 Virginia | Extrusion die |
DE3532937A1 (en) | 1985-09-14 | 1987-04-02 | Werner & Pfleiderer | HOLE PLATE FOR UNDERWATER PELLETIZATION OF PLASTIC STRINGS |
EP0246921A2 (en) | 1986-05-22 | 1987-11-25 | Rogers Tool Works, Inc. | Internally insulated extrusion die |
DE19515473A1 (en) | 1995-04-27 | 1996-10-31 | Werner & Pfleiderer | Underwater pelletizing plate with wear protection layer |
DE19811089A1 (en) | 1997-03-28 | 1998-10-01 | Japan Steel Works Ltd | Synthetic resin granulating die ring |
DE19962036A1 (en) | 1999-12-22 | 2001-06-28 | Krupp Werner & Pfleiderer Gmbh | Perforated plate for a granulating device |
DE10002408A1 (en) | 1999-12-24 | 2001-07-12 | Bkg Bruckmann & Kreyenborg Granuliertechnik Gmbh | Extruder plate for submerged granulator for producing plastic granules has conical extension, is fitted with heaters and contains cavity which is separated from cutter chamber by partition wall and is filled with insulator |
EP1413413A1 (en) | 2002-10-22 | 2004-04-28 | Gerhard Hehenberger | Die for granulation |
WO2005044532A2 (en) * | 2003-11-05 | 2005-05-19 | Starlinger & Co Gesellschaft M.B.H. | Device and method for granulation of materials with thermoplastic properties and granulating die plate for arrangement in such a granulation device |
DE102005021544A1 (en) * | 2004-05-10 | 2005-12-15 | The Japan Steel Works, Ltd. | Method and apparatus for heating a plastic extrusion mold |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102009011495A1 (en) * | 2009-03-06 | 2010-09-09 | Von Ardenne Anlagentechnik Gmbh | Method for the continuous treatment of a flat substrate in a vacuum comprises heating the substrate within a flow resistor using heat radiation from the wall of the resistor |
DE102009011495B4 (en) * | 2009-03-06 | 2013-07-18 | Von Ardenne Anlagentechnik Gmbh | Method and apparatus for treating substrates using gas separation |
DE102010023826A1 (en) * | 2010-06-15 | 2011-12-15 | Automatik Plastics Machinery Gmbh | Perforated plate i.e. granulation perforated plate, for use in granular head of extruder of granulation device to granulate e.g. polyamide, has functional element arranged in area of orifices and clamped against body via clamping element |
WO2012095125A1 (en) * | 2011-01-11 | 2012-07-19 | Automatik Plastics Machinery Gmbh | Perforated plate |
DE102012002294A1 (en) * | 2012-02-07 | 2013-08-08 | Automatik Plastics Machinery Gmbh | Perforated plate of a granulator useful for a molten material e.g. thermoplastic plastics material, comprises a melt passage or channel extending in the granulator, and nozzle openings including a respective melt outlet region |
DE102021205606A1 (en) | 2021-06-02 | 2022-12-08 | Lean Plastics Technologies GmbH | Extrusion tool and process for underwater granulation |
Also Published As
Publication number | Publication date |
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AT507443A1 (en) | 2010-05-15 |
AT507443B1 (en) | 2011-06-15 |
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