EP3057761A1 - Device and method for cooling profiled plastic sections - Google Patents

Device and method for cooling profiled plastic sections

Info

Publication number
EP3057761A1
EP3057761A1 EP14786157.9A EP14786157A EP3057761A1 EP 3057761 A1 EP3057761 A1 EP 3057761A1 EP 14786157 A EP14786157 A EP 14786157A EP 3057761 A1 EP3057761 A1 EP 3057761A1
Authority
EP
European Patent Office
Prior art keywords
profile
webs
tool
plastic
cooling
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Withdrawn
Application number
EP14786157.9A
Other languages
German (de)
French (fr)
Inventor
Wolfgang Sedlacek
Dietmar Stani
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.)
Battenfeld-Cincinnati Austria GmbH
Battenfeld Cincinnati Austria GmbH
Original Assignee
Battenfeld-Cincinnati Austria GmbH
Battenfeld Cincinnati Austria GmbH
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 Battenfeld-Cincinnati Austria GmbH, Battenfeld Cincinnati Austria GmbH filed Critical Battenfeld-Cincinnati Austria GmbH
Publication of EP3057761A1 publication Critical patent/EP3057761A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/256—Exchangeable extruder parts
    • B29C48/2566—Die parts
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87—Cooling
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/757—Moulds, cores, dies

Definitions

  • the invention relates to a device for increasing the cooling capacity of an extrusion line and for energy-efficient extrusion of a plastic profile, in particular a plastic tube, comprising at least one extruder, a profile-forming tool, consisting of at least one inner rim and an outer rim, wherein the inner rim and the outer ring are connected to webs, a calibration and further downstream equipment.
  • the invention also relates to a related method.
  • the solution of the object to the device is characterized in connection with the preamble of claim 1, that one or more of the webs connecting the inner ring and the outer ring has a channel, wherein the channel has a fluidic connection between the inlet region for a cooling medium on the one hand and forms the Profilholraum on the other hand.
  • a web with one channel is sufficient, but for better melt distribution it should be two or three webs, whereby not necessarily in each web a channel for blowing the cooling medium is required. With increasing diameter of the profile cross-section, the number of webs should also be increased. Fortification according to several webs are provided with a channel, wherein the webs are arranged in a plane. In a section perpendicular to the extrusion axis through the webs therefore all webs would cut because they are on a plane. It can thus be NEN relatively simple annular channel all channels in the webs are connected to a blowing device.
  • the webs are distributed symmetrically over the circumference.
  • the webs can also be arranged vertically, rotated and / or offset from the extrusion direction.
  • the device can also be used in the reverse flow direction of the gaseous medium.
  • a suction device is to be used and the blowing effect described above is a suction effect or a blowing of the air used, for example, is to be understood as suction.
  • the object with respect to the method is in conjunction with the preamble of claim 8 gel ö stung that for internal cooling of the profile, a gaseous medium in the extrusion direction is blown through the extruded plastic profile, wherein the gaseous medium by at least one channel in a web within of the tool is blown, wherein the gaseous medium is additionally blown through the profile before it is released into the ambient air.
  • air is blown through the tool via the channels arranged in the webs through the interior of the profile to the end of the extrusion line and released to the environment.
  • the air can also be blown through a plurality of the channels of the device described above and thus the blowing power and the flow velocity of the air are influenced by the interior of the profile.
  • the device can also be used for sucking the gaseous medium, this of course also applies analogously to the claimed method.
  • the gaseous medium is then sucked through the profile and through at least one channel in a web inside the tool and then released to the environment.
  • Fig. 1 shows a typical extrusion line
  • Fig. 2 shows a partial area with extruder and tool
  • FIG. 3 is a section through the tool FIG. 1 shows a typical extrusion line, as used today for profile extrusion, for example for the production of window profiles or pipes. It shows an extruder 1 in which plastic is melted and continuously conveyed into the extrusion tool 2 for shaping. This is followed by a calibration and / or cooling device 3 connects. Depending on the profile, additional cooling stations can be used. After the cooling stations, a trigger device 4 connects. In order to cut off the endless profiles 6 to the desired length, a separating device 5 is then arranged. All parts extend along the extrusion cages 8. The extrusion direction is indicated by the arrow 7. A fan 14 is arranged directly on the tool 2 to suck the gaseous medium 11, here air, and to blow through the system.
  • a fan 14 is arranged directly on the tool 2 to suck the gaseous medium 11, here air, and to blow through the system.
  • FIG. 2 shows a partial area with the extruder 1 and the tool 2, which gives the profile 6, in this case a plastic tube, the shape before it is calibrated by means of some of the downstream units shown in FIG. 1 and cured to dimensional stability.
  • a gaseous medium 11 is blown.
  • the gaseous medium 11, preferably air, is blown from the inlet region 12 on the tool 2 through the channels 10 located in the webs 9 into the profile 6, conveyed through its interior and discharged again at the outlet region 13 at the end of the profile 6 to the environment.
  • the extrusion direction is again marked by arrow 7.
  • Figure 3 shows a section through the tool 2, wherein the section is perpendicular to the extrusion axis through the webs 9 and includes only the essential parts for the description of the invention. Since the section runs perpendicular to the extrusion axis 8, the extrusion axis 8 can only be seen as a point.
  • the tool 2 comprises an inner rim 2a and an outer rim 2b. Both parts are via webs 9, here by way of example eight webs are shown connected to each other.
  • a support ring 2c is arranged between the inner ring 2a and the outer ring 2b through which the melt flowing through is further divided. The support ring 2c is not mandatory.
  • All eight webs are arranged in a plane and each have a channel 10.
  • the channel 10 has on the side to the inner ring 2a a fluidic connection to the profile cavity and thus also a connection to the environment.
  • the fluidic connection is given to the fan 14, not shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a device and a method for increasing the cooling power of an extrusion line and for extruding a profiled plastic section in an energy-efficient manner, in particular a plastic tube, comprising at least one extruder (6); a tool (2) which shapes the profiled section (6), said tool consisting of at least one inner ring (2a) and an outer ring (2b), wherein the inner ring (2a) and the outer ring (2b) are connected by webs (9); a calibrating unit; and additional subsequent devices.

Description

Vorrichtung und Verfahren zum Kühlen  Apparatus and method for cooling
von Kunststoffprofilen  of plastic profiles
Beschreibung: Die Erfindung betrifft Vorrichtung zum Erhöhen der Kühlleistung einer Extrusionslinie und zum energieeffizienten Extrudieren eines Kunststoffprofils, insbesondere eines Kunststoffrohres, umfassend mindestens einen Extruder, ein das dem Profil die Form gebendes Werkzeug, bestehend aus mindestens einem Innenkranz und einem Außenkranz, wobei der Innenkranz und der Außenkranz mit Stegen verbunden sind, eine Kalibrierung sowie weitere Nachfolgeeinrichtungen. Die Erfindung betrifft ebenso ein diesbezügliches Verfahren. The invention relates to a device for increasing the cooling capacity of an extrusion line and for energy-efficient extrusion of a plastic profile, in particular a plastic tube, comprising at least one extruder, a profile-forming tool, consisting of at least one inner rim and an outer rim, wherein the inner rim and the outer ring are connected to webs, a calibration and further downstream equipment. The invention also relates to a related method.
Aus dem Stand der Technik ist die DE 10 2008 047 211 AI bekannt, die eine Extrusionslinie zur Herstellung von Kunststoffprofilen, vorzugsweise Kunststoffrohren, umfassend mindestens einen Extruder, ein Werkzeug, eine Kalibrierung sowie weitere Nachfolgeeinrichtungen um- fasst bei der zumindest das Werkzeug mindestens einen Durchbruch aufweist und in Extrusionsrichtung gesehen vor dem Werkzeug eine Ab- saugung angeordnet ist, mittels der Luft im Inneren des Kunststoffprofils austauschbar ist. DE 10 2008 047 211 AI is known from the prior art, which comprises an extrusion line for the production of plastic profiles, preferably plastic pipes, comprising at least one extruder, a tool, a calibration and further downstream facilities at least the tool at least one breakthrough and seen in the extrusion direction in front of the tool, a suction is arranged, by means of the air in the interior of the plastic profile is interchangeable.
Dieses Innenkühlen des Profils durch Luftsaugen erhöht die Kühlleistung bzw. verkürzt die Kühlstrecke. Eine Temperierung der Kunststoffschmelze im Werkzeug, um die Wärme möglichst gleichmäßig über die gesamte Wanddicke des Kunststoffprofils abzuführen und dadurch die Kühlleistung einer Extrusionslinie zu erhöhen, wird in der DE 10 2008 047 209 AI beschrieben. Dies erfordert aber immer ein Absaugen von Luft durch den Durchbruch des Werkzeuges und das Hohlprofil sowie den Einsatz eines Kühlmediums, das die Schmelze im Werkzeug temperiert. This internal cooling of the profile by air suction increases the cooling capacity or shortens the cooling distance. A temperature of the plastic melt in the tool to dissipate the heat as evenly as possible over the entire wall thickness of the plastic profile and thereby increase the cooling capacity of an extrusion line is described in DE 10 2008 047 209 AI. However, this always requires a suction of air through the opening of the tool and the hollow profile and the use of a cooling medium, which tempered the melt in the tool.
A u f g a b e der Erfindung ist es, eine derart bekannte Vorrichtung derart weiterzuentwickeln, dass auf den Durchbruch im Werkzeug verzichtet werden kann und trotzdem weiterhin eine Kühlung durch des Inneren des Profils ermöglicht wird. Weiterhin soll ein diesbezügliches Verfahren angeboten werden. Die L ö s u n g der Aufgabe zur Vorrichtung ist in Verbindung mit dem Oberbegriff des Anspruches 1 dadurch gekennzeichnet, dass einer oder mehrere der den Innenkranz und den Außenkranz verbindenden Stege einen Kanal aufweist, wobei der Kanal eine fluidische Verbindung zwischen dem Eintrittsbereich für ein Kühlmedium einerseits und dem Profilholraum andererseits bildet. It is an object of the invention to further develop such a known device in such a way that the breakthrough in the tool can be dispensed with and, nevertheless, cooling by the interior of the profile is still possible. Furthermore, a related process should be offered. The solution of the object to the device is characterized in connection with the preamble of claim 1, that one or more of the webs connecting the inner ring and the outer ring has a channel, wherein the channel has a fluidic connection between the inlet region for a cooling medium on the one hand and forms the Profilholraum on the other hand.
Es wird damit erreicht, dass auf den Durchbruch im Werkzeug verzichtet werden kann, da beispielsweise Luft vom Außenkranz über den Kanal im Steg zum Innenkranz in den Hohlraum des Profils geblasen und dann an die Umwelt abgegeben werden kann. Prinzipiell ist ein Steg mit ei- nem Kanal ausreichend, zur besseren Schmelzeaufteilung sollten es aber zwei oder drei Stege sein, wobei nicht zwingend in jedem Steg eine Kanal für das Einblasen des Kühlmediums erforderlich ist. Mit zunehmendem Durchmesser des Profilquerschnittes sollte die Anzahl der Stege ebenfalls erhöht werden. Fortbildungsgemäß sind mehrere Stege mit einem Kanal vorgesehen, wobei die Stege in einer Ebene angeordnet sind. Bei einem Schnitt senkrecht zur Extrusionsachse durch die Stege würden demzufolge alle Stege geschnitten, da sie sich auf einer Ebene befinden. Es können so über ei- nen relativ einfachen Ringkanal alle Kanäle in den Stegen mit einer Blaseinrichtung verbunden werden. It is thus achieved that can be dispensed with the breakthrough in the tool, since, for example, air can be blown from the outer rim via the channel in the web to the inner ring in the cavity of the profile and then released to the environment. In principle, a web with one channel is sufficient, but for better melt distribution it should be two or three webs, whereby not necessarily in each web a channel for blowing the cooling medium is required. With increasing diameter of the profile cross-section, the number of webs should also be increased. Fortification according to several webs are provided with a channel, wherein the webs are arranged in a plane. In a section perpendicular to the extrusion axis through the webs therefore all webs would cut because they are on a plane. It can thus be NEN relatively simple annular channel all channels in the webs are connected to a blowing device.
Es können auch mehre Ebenen mit mehreren Stegen oder mehre Stege auf mehreren Ebenen hintereinander angeordnet werden, um eine effektivere Kühlwirkung auf die Extrusionslinie zu übertragen. It is also possible to arrange several levels with several webs or several webs on several levels in succession in order to transfer a more effective cooling effect to the extrusion line.
Vorteilhafterweise sind die Stege symmetrisch über den Umfang verteilt. Die Stege können auch senkrecht, verdreht und/oder versetzt zur Extru- sionsrichtung angeordnet sind. Je nach Einsatzgebiet kann der zwischen dem Innenkranz und den Außenkranz ein Tragring angeordnet sein. Prinzipiell kann die Vorrichtung auch mit umgekehrter Fließrichtung des gasförmigen Mediums eingesetzt werden. In diesem Fall ist dann statt der Blaseinrichtung eine Saugeinrichtung einzusetzen und die oben beschriebene Blaswirkung ist eine Saugwirkung bzw. ein Blasen der beispielsweise eingesetzten Luft ist als Saugen zu verstehen. Advantageously, the webs are distributed symmetrically over the circumference. The webs can also be arranged vertically, rotated and / or offset from the extrusion direction. Depending on the application of the between the inner ring and the outer ring may be arranged a support ring. In principle, the device can also be used in the reverse flow direction of the gaseous medium. In this case, instead of the blowing device, a suction device is to be used and the blowing effect described above is a suction effect or a blowing of the air used, for example, is to be understood as suction.
Die Aufgabe bezüglich des Verfahrens wird in Verbindung mit dem Oberbegriff des Anspruchs 8 dadurch g e l ö s t , dass zur inneren Kühlung des Profils ein gasförmiges Medium in der Extrusionsrichtung durch das extrudierte Kunststoffprofil geblasen wird, wobei das gasförmige Medium durch wenigsten einen Kanal in einem Steg innerhalb des Werkzeuges geblasen wird, wobei das gasförmige Medium zusätzlich durch das Profil geblasen wird bevor es an die Umgebungsluft abgegeben wird. Es wird also beispielsweise Luft durch das Werkzeug über die in den Stegen angeordneten Kanäle durch das Innere des Profils bis an das Ende der Extrusionsline geblasen und an die Umwelt abgegeben. The object with respect to the method is in conjunction with the preamble of claim 8 gel ö stung that for internal cooling of the profile, a gaseous medium in the extrusion direction is blown through the extruded plastic profile, wherein the gaseous medium by at least one channel in a web within of the tool is blown, wherein the gaseous medium is additionally blown through the profile before it is released into the ambient air. Thus, for example, air is blown through the tool via the channels arranged in the webs through the interior of the profile to the end of the extrusion line and released to the environment.
Selbstverständlich kann auch die Luft durch mehrere der Kanäle der weiter oben beschriebenen Vorrichtung geblasen werden und so die Blasleistung respektive die Strömungsgeschwindigkeit der Luft durch das Innere des Profils beeinflusst werden. Of course, the air can also be blown through a plurality of the channels of the device described above and thus the blowing power and the flow velocity of the air are influenced by the interior of the profile.
Wie bereits erwähnt wird vorgeschlagen als gasförmiges Medium Luft einzusetzen, es ist aber auch denkbar andere geeignete Medien wie ge- kühlten Stickstoff etc. einzusetzen. As already mentioned, it is proposed to use air as the gaseous medium, but it is also conceivable to use other suitable media, such as cooled nitrogen, etc.
Wie bereits erwähnt kann die Vorrichtung auch zum Saugen des gasförmigen Mediums eingesetzt werden, dies gilt natürlich auch analog für das beanspruchte Verfahren. Es wird dann das gasförmige Medium durch das Profil und durch wenigsten einen Kanal in einem Steg inner- halb des Werkzeuges gesaugt und dann an die Umwelt abgegeben. As already mentioned, the device can also be used for sucking the gaseous medium, this of course also applies analogously to the claimed method. The gaseous medium is then sucked through the profile and through at least one channel in a web inside the tool and then released to the environment.
In den Zeichnungen wird schematisch eine erfindungsgemäße Vorrich tung gezeigt: In the drawings, a Vorrich device according to the invention is shown schematically:
Fig. 1 zeigt eine typische Extrusionslinie Fig. 1 shows a typical extrusion line
Fig. 2 einen Teilbereich mit Extruder und Werkzeug und Fig. 2 shows a partial area with extruder and tool and
Fig. 3 einen Schnitt durch das Werkzeug Figur 1 zeigt eine typische Extrusionslinie, wie sie heute für die Pro- filextrusion, zum Beispiel für die Produktion von Fensterprofilen oder Rohren, zum Einsatz kommt. Sie zeigt einen Extruder 1, in dem Kunststoff aufgeschmolzen wird und kontinuierlich zur Formgebung ins Extrusionswerkzeug 2 gefördert wird. Daran schließt sich eine Kalibrier- und/oder Kühleinrichtung 3 an. Je nach Profil können weitere Kühlstationen eingesetzt werden. Nach den Kühlstationen schließt sich eine Abzugsvorrichtung 4 an. Um die Endlosprofile 6 auf die gewünschte Länge abzuschneiden ist anschließend eine Trennvorrichtung 5 angeordnet. Al- le Teile erstrecken sich entlang der Extrusionsaches 8. Die Extrusions- richtung ist mit dem Pfeil 7 angegeben. Ein Ventilator 14 ist direkt am Werkzeug 2 angeordnet, um das gasförmige Medium 11 , hier Luft, anzusaugen und durch die Anlage zu blasen. Fig. 3 is a section through the tool FIG. 1 shows a typical extrusion line, as used today for profile extrusion, for example for the production of window profiles or pipes. It shows an extruder 1 in which plastic is melted and continuously conveyed into the extrusion tool 2 for shaping. This is followed by a calibration and / or cooling device 3 connects. Depending on the profile, additional cooling stations can be used. After the cooling stations, a trigger device 4 connects. In order to cut off the endless profiles 6 to the desired length, a separating device 5 is then arranged. All parts extend along the extrusion cages 8. The extrusion direction is indicated by the arrow 7. A fan 14 is arranged directly on the tool 2 to suck the gaseous medium 11, here air, and to blow through the system.
Figur 2 zeigt eine Teilbereich mit dem Extruder 1 und dem Werkzeug 2, das dem Profil 6, hier ein Kunststoffrohr, die Form gibt, bevor es mittels einiger der in Figur 1 gezeigten Nachfolgeeinrichtungen kalibriert und bis zur Formstabilität ausgehärtet wird. Sowohl durch Werkzeug 2 als auch durch das Innere des Profils 6 wird ein gasförmiges Medium 11 geblasen. Das gasförmige Medium 11 , vorzugsweise Luft, wird vom Eintrittsbereich 12 am Werkzeug 2 durch die in den Stegen 9 befindlichen Kanäle 10 in das Profil 6 geblasen, durch dessen Innere gefördert und am Austrittsbereich 13 am Ende des Profils 6 wieder an die Umwelt abgegeben. Die Extrusionsrichtung ist wieder mittels Pfeil 7 gekennzeichnet. Figur 3 zeigt einen Schnitt durch das Werkzeug 2, wobei der Schnitt senkrecht zur Extrusionsachse durch die Stege 9 verläuft und nur die für die Beschreibung der Erfindung wesentlichen Teile umfasst. Da der Schnitt senkrecht zur Extrusionachse 8 verläuft ist die Extrusionsachse 8 nur als Punkt zu sehen. Um die Extrusionsachse 8 umfasst das Werk- zeug 2 einen Innenkranz 2a und einen Außenkranz 2b. Beide Teile sind über Stege 9, hier sind beispielhaft acht Stege dargestellt, miteinander verbunden. Zusätzlich ist zwischen dem Innenkranz 2a und dem Außenkranz 2b ein Tragring 2c angeordnet durch den die durchfließende Schmelze weiter aufgeteilt wird. Der Tragring 2c ist aber nicht zwingend erforderlich. FIG. 2 shows a partial area with the extruder 1 and the tool 2, which gives the profile 6, in this case a plastic tube, the shape before it is calibrated by means of some of the downstream units shown in FIG. 1 and cured to dimensional stability. Both through the tool 2 and through the interior of the profile 6, a gaseous medium 11 is blown. The gaseous medium 11, preferably air, is blown from the inlet region 12 on the tool 2 through the channels 10 located in the webs 9 into the profile 6, conveyed through its interior and discharged again at the outlet region 13 at the end of the profile 6 to the environment. The extrusion direction is again marked by arrow 7. Figure 3 shows a section through the tool 2, wherein the section is perpendicular to the extrusion axis through the webs 9 and includes only the essential parts for the description of the invention. Since the section runs perpendicular to the extrusion axis 8, the extrusion axis 8 can only be seen as a point. Around the extrusion axis 8, the tool 2 comprises an inner rim 2a and an outer rim 2b. Both parts are via webs 9, here by way of example eight webs are shown connected to each other. In addition, a support ring 2c is arranged between the inner ring 2a and the outer ring 2b through which the melt flowing through is further divided. The support ring 2c is not mandatory.
Alle acht Stege sind in einer Ebene angeordnet und weisen je einen Kanal 10 auf. Der Kanal 10 hat auf der Seite zum Innenkranz 2a eine fluidische Verbindung zum Profilhohlraum und somit auch ein Verbindung zur Umwelt. Auf der Seite zum Außenkranz 2b ist die fluidische Ver- bindung zum nicht dargestellten Ventilator 14 gegeben. All eight webs are arranged in a plane and each have a channel 10. The channel 10 has on the side to the inner ring 2a a fluidic connection to the profile cavity and thus also a connection to the environment. On the side of the outer rim 2b, the fluidic connection is given to the fan 14, not shown.
Bezugszeichenliste : List of reference numbers:
1 Extruder  1 extruder
2 Extrusionswerkzeug  2 extrusion tool
2a Innenkranz 2a inner ring
2b Außenkranz 2b outer ring
2c Tragring  2c support ring
3 Kalibrier- und/oder Kühleinrichtung 3 calibration and / or cooling device
4 Abzugsvorrichtung 4 extraction device
5 Trennvorrichtung  5 separating device
6 Profil 6 profile
7 Extrusionsrichtung  7 extrusion direction
8 Extrusionsachse  8 extrusion axis
9 Steg zwischen 2a und 2b  9 footbridge between 2a and 2b
10 Kanal in 9  10 channels in 9
11 gasförmiges Medium 11 gaseous medium
12 Eintrittsbereich für 11  12 entry area for 11
13 Austrittsbereich für 11  13 exit area for 11
14 Ventilator  14 fans

Claims

Patentansprüche : Patent claims:
1. Vorrichtung zum Erhöhen der Kühlleistung einer Extrusionslinie und zum energieeffizienten Extrudieren eines Kunststoffprofils, insbesondere eines Kunststoffrohres, umfassend mindestens einen Extruder (1), 1. Device for increasing the cooling capacity of an extrusion line and for energy-efficient extrusion of a plastic profile, in particular a plastic pipe, comprising at least one extruder (1),
ein das dem Profil (6) die Form gebende Werkzeug (2), bestehend aus mindestens einem Innenkranz (2a) und einem Außenkranz (2b), a tool (2) which gives the profile (6) the shape, consisting of at least one inner ring (2a) and an outer ring (2b),
wobei der Innenkranz (2a) und der Außenkranz (2b) mit Ste- gen (9) verbunden sind, wherein the inner ring (2a) and the outer ring (2b) are connected to webs (9),
eine Kalibrierung (3) a calibration (3)
sowie weitere Nachfolgeeinrichtungen (4, 5), dadurch gekennzeichnet, dass einer oder mehreren der den Innenkranz (2a) und den Außen- kränz (2b) verbindenden Stege (9) einen Kanal (10) aufweist, wobei der Kanal (10) eine fluidische Verbindung zwischen dem Eintrittsbereich (12) für das Kühlmedium einerseits und dem Pro- filholraum andererseits bildet. and further successor devices (4, 5), characterized in that one or more of the webs (9) connecting the inner ring (2a) and the outer ring (2b) have a channel (10), the channel (10) having a fluidic Connection between the inlet area (12) for the cooling medium on the one hand and the profile cavity on the other hand.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass mehrere Stege (9) mit einem Kanal (10) vorgesehen sind, wobei die Stege (9) in einer Ebene angeordnet sind. 2. Device according to claim 1, characterized in that a plurality of webs (9) with a channel (10) are provided, the webs (9) being arranged in one plane.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass mehrere Stege (9) in mehreren Ebenen angeordnet sind. 3. Device according to claim 2, characterized in that a plurality of webs (9) are arranged in several levels.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Stege (9) symmetrisch über den Umfang verteilt sind. 4. Device according to one of claims 1 to 3, characterized in that the webs (9) are distributed symmetrically over the circumference.
5. Vorrichtung nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die Stege (9) senkrecht zur Extrusionsrichtung (7) angeordnet sind. 5. Device according to one of the preceding claims, characterized in that the webs (9) are arranged perpendicular to the extrusion direction (7).
6. Vorrichtung nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die Stege (9) verdreht und/oder versetzt angeordnet sind. 6. Device according to one of the preceding claims, characterized in that the webs (9) are arranged twisted and / or offset.
7. Vorrichtung nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass zwischen dem Innenkranz (2a) und den Außenkranz (2b) ein Tragring (2c) angeordnet ist. 7. Device according to one of the preceding claims, characterized in that a support ring (2c) is arranged between the inner ring (2a) and the outer ring (2b).
Verfahren zum Erhöhen der Kühlleistung einer Extrusionslinie und zum energieeffizienten Extrudieren eines Kunststoffprofils, insbesondere eines Kunststoffrohres, das die Schritte umfasst, Method for increasing the cooling capacity of an extrusion line and for energy-efficient extrusion of a plastic profile, in particular a plastic pipe, comprising the steps,
a) Aufschmelzen von Kunststoff in einem Extruder (1), a) melting plastic in an extruder (1),
b) Formen eines Kunststoffstranges und Zufuhren des Kunststoffstranges zu einem Werkzeug (2), bestehend aus mindestens einem Innenkranz (2a) und einem Außenkranz (2b), b) forming a plastic strand and feeding the plastic strand to a tool (2), consisting of at least one inner ring (2a) and one outer ring (2b),
c) Formen eines Kunststoffprofiles mittels des Werkzeuges (2) und c) forming a plastic profile using the tool (2) and
d) Kalibrieren und Aushärten mittels Kühlung des Profils in einer Kühl und/oder Kalibrierung (3), dadurch gekennzeichnet, dass zur inneren Kühlung des Profils (6) ein gasförmiges Medium (11) in der Extrusionsrichtung (14) durch das extrudierte Kunststoff- profil (6) geblasen wird, wobei d) Calibration and hardening by cooling the profile in a cooling and/or calibration (3), characterized in that for internal cooling of the profile (6) a gaseous medium (11) is passed through the extruded plastic profile in the extrusion direction (14). (6) is blown, whereby
das gasförmige Medium (11) durch wenigsten einen Kanal (10) in einem Steg (9) innerhalb des Werkzeuges (2) geblasen wird, wobei das gasförmige Medium (11) zusätzlich durch das Profil (6) geblasen wird bevor es an die Umgebungsluft abgegeben wird. the gaseous medium (11) is blown through at least one channel (10) in a web (9) within the tool (2), the gaseous medium (11) being additionally blown through the profile (6) before it is released into the ambient air becomes.
9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass als gasförmiges Medium Luft zum Einsatz kommt. 9. The method according to claim 8, characterized in that air is used as the gaseous medium.
Verfahren nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass das gasförmige Medium (11) durch das Profil (6) und durch wenigsten einen Kanal (10) in einem Steg (9) innerhalb des Werkzeuges (2) gesaugt wird. Method according to one of claims 8 or 9, characterized in that the gaseous medium (11) is sucked through the profile (6) and through at least one channel (10) in a web (9) within the tool (2).
EP14786157.9A 2013-10-14 2014-10-10 Device and method for cooling profiled plastic sections Withdrawn EP3057761A1 (en)

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DE201310220746 DE102013220746A1 (en) 2013-10-14 2013-10-14 Apparatus and method for cooling plastic profiles
PCT/EP2014/071822 WO2015055549A1 (en) 2013-10-14 2014-10-10 Device and method for cooling profiled plastic sections

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WO2015055549A1 (en) 2015-04-23

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