EP0652411B1 - Apparatus for removing surface water from plastic strands - Google Patents

Apparatus for removing surface water from plastic strands Download PDF

Info

Publication number
EP0652411B1
EP0652411B1 EP94115899A EP94115899A EP0652411B1 EP 0652411 B1 EP0652411 B1 EP 0652411B1 EP 94115899 A EP94115899 A EP 94115899A EP 94115899 A EP94115899 A EP 94115899A EP 0652411 B1 EP0652411 B1 EP 0652411B1
Authority
EP
European Patent Office
Prior art keywords
strand
guiding path
blowing nozzles
nozzles
plastic strands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94115899A
Other languages
German (de)
French (fr)
Other versions
EP0652411A1 (en
Inventor
Bernhard Dipl.-Ing. Scheuring
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.)
Krupp Werner and Pfleiderer GmbH
Original Assignee
Krupp Werner and Pfleiderer 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 Krupp Werner and Pfleiderer GmbH filed Critical Krupp Werner and Pfleiderer GmbH
Publication of EP0652411A1 publication Critical patent/EP0652411A1/en
Application granted granted Critical
Publication of EP0652411B1 publication Critical patent/EP0652411B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/06Washing or drying
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/001Drying and oxidising yarns, ribbons or the like

Definitions

  • the invention relates to a device according to the Preamble of claim 1.
  • the flat material to be cleaned is supplied by a positioning device transported to a drying facility via a washing zone.
  • the drying device comprises two spaced-apart, the flat material with hot air on both sides Slit nozzle pairs. Their against the roughly horizontal direction of travel directed blowing direction closes an angle of approx. 45 ° to the direction of flow a.
  • the slit nozzles of the slit nozzle pairs are around a rear Swivel axis pivotally mounted. Are in the area of their blowholes a rounded sliding element on the lower and upper surface of the cleaned flat material. Both slit nozzle pairs are preferably of identical design.
  • the invention has for its object a device of the generic type To be designed in such a way that, with little construction effort, a uniform, highly effective drying effect of all plastic strands is made possible.
  • both rows of nozzles adapted to a specific product, or a correspondingly different one Surface moisture content can be fixed, in which their angle of attack is at an angle to the strand guideway is changed.
  • a further development of the invention according to claim 4 enables easy access to the strand guideway if necessary, in particular for the purpose of cleaning or replacing parts of the drying device.
  • a problem-free discharge of the blown air and the cooling water to be separated is ensured in a space-saving design.
  • components which are designed in the form of a multiple nozzle can advantageously be used in a development according to claim 6.
  • a further embodiment of the invention according to claim 8 serves to protect the blowing nozzles.
  • This ensures that an equally good drying effect is achieved for the plastic strands, even with different plastics or external dimensions of the plastics.
  • an automatic raising of the baffle plate arranged above the strand guide track is provided by such a bead. In addition to the protection of the blow nozzles, this also ensures a continuous strand run for plastics that tend to bulge.
  • FIG. 1 shows the guiding of a flat bundle of plastic strands 4 starting from an extruder nozzle 2 of an extruder 3 through a cooling liquid section 5 of a cooling bath 6 to a drying device 1.
  • the strand bundle 4 is fed via rollers 10 to the blowing nozzles 7 and 8, respectively, which are arranged above and below the web plane 9 of the plastic strands 4.
  • the blowing nozzles 7, 8 consist of a row of individual nozzles arranged next to one another which blow at an angle to the strand guiding path, as will be explained in more detail below.
  • the drying device 1 consists like FIG. 2 and FIG. 3 show a frame 11 with upper supports 12, 12a and lower supports 13, 13a.
  • Two intermediate supports 15, 15a in the frame 11 serve for rotatably accommodating the rollers 10 in guide pins 14.
  • the rollers 10 are provided on their outer surface with receiving grooves 16, suitable for receiving plastic strands with a diameter of about 3-4 mm.
  • a compressed air tube 17 or 18 is fastened for receiving and for supplying blowing nozzles 7, 8 with compressed air.
  • Both compressed air pipes 17, 18 are fastened to the supports 12, 12a, 13, 13a by means of sleeves 19 and screw connections 20 and can be fixed as desired in their angular position in relation to the plane 9 of the web.
  • the blowing nozzles 7 and 8, which are arranged in a row in the same direction in a plurality of perforated nozzles of approximately 1 mm in diameter on the compressed air tube 17 and 18, can be arbitrarily fixed in their angular position to the web plane 9. In this way, the blowing nozzles 7, 8 generate a targeted air flow acting on the plastic strands 4 in a knife-like manner without turbulence.
  • a rectified adjustment of the blowing nozzles 7, 8 is simplified if, as shown, multiple nozzles 24 are used, which are individually designed with up to 16 perforated nozzles 45.
  • each multiple nozzle 24 is designed with a pipe section 21 and a sleeve 22 for attachment to the compressed air pipes 17, 18.
  • the air stream discharged via the blowing nozzles 7, 8 is directed onto the surface of the product at a defined angle ⁇ against the transport direction 25 of the plastic strands 4.
  • a brush strip 23 is arranged upstream of the roller 10 on the input side in the transport direction 25 of the plastic strands 4 over the entire width of the web plane 9.
  • the brush strip 23 is fastened to the upper carrier 12, 12a and penetrates the web plane 9 with its brush, the surface water around the plastic strands 4 being roughly stripped off.
  • the surface water stripped off from the plastic strands 4 and the surface water blown off by the blowing nozzles 7, 8 falls into a trough-shaped collecting container 26, which is firmly attached to the lower supports 13, 13a in the frame 11.
  • the water is separated from the blown air.
  • An opening 27 in the collecting container 26 enables the required blown air outlet.
  • the blown air is supplied to the compressed air pipes 17, 18 via a compressed air supply 28.
  • the blown air is generated by a side-channel blower 30 connected to a drive motor 29, which blowers 7,8 supply compressed air of approximately 400 mbar to the blower nozzles 28 via the compressed air supply 28.
  • the upper supports 12, 12a can be folded on one side by means of a hinge joint 31, so that sufficient access to the rollers 10 and and the blowing nozzles 7, 8 is made possible.
  • the guidance of the plastic strands 4 can be checked and the proper functioning of the blowing nozzles 7, 8 can be checked.
  • A serves to protect the blowing nozzles 7,8 from damage this immediately upstream protective device, the from an upper and a lower baffle plate 33, 34 is formed. They are at an angle to each other posed, the legs against the direction of transport 25 are open.
  • Both baffle plates 33, 34 are each means adjustable straps 35,36 on the upper and lower Carrier 12, 13 connected via fastening means 44.
  • the position of the baffle plates 33, 34 can selected angular position of the blowing nozzles 7.8 accordingly be adjusted. Your distance from each other in the area of Path level 9 corresponds approximately to the mutual distance of the blow nozzle series 7.9.
  • FIG. 5 A further embodiment for securing the blowing nozzles 7, 8 within the path of the plastic strands 4 is shown in FIG. 5.
  • the protective device also consists of an upper baffle plate 37 and a lower baffle plate 38 between which the plastic strands 4 are passed.
  • the lower baffle plate 38 is screwed onto the lower support 13, while the upper baffle plate 37 can be pivoted upwards by means of a parallel guide 32.
  • the struts 39, 40 of the parallel guide 32 are connected in an articulated manner to the frame 11 via tabs 41, 42. Since the upper blow nozzles 7 and the associated compressed air tube 17 are fastened to the strut 40 of the parallel guide 32, the blow nozzles 7 can be pivoted upwards together with the upper baffle plate.
  • blow nozzles 7 and 8 remain undamaged in the event of irregular strand guidance, for example formation of strand beads.
  • a counterweight 43 connected to the tab 42 ensures that the force required to lift the upper blowing nozzles 7 can be set.
  • blowing nozzles 7,8 Track level 9 at the same and close distance lock in.
  • Blowing nozzles 7 and 8 against each other are transverse to the plane of the web 9 with an even distribution of the air flow defined direction achieved.

Description

Die Erfindung betrifft eine Vorrichtung gemäss dem Oberbegriff des Patentanspruchs 1.The invention relates to a device according to the Preamble of claim 1.

Bei einer derartigen aus der DE 39 00 250 A1 bekannten Vorrichtung werden die Kunststoffstränge nach Durchlaufen einer Kühlflüssigkeitsstrecke über eine Entwässerungsstrecke getrocknet, deren Boden im wesentlichen mit einem Sieb und nachfolgend mit einem Wasserablauf ausgebildet ist, wodurch die Kunststoffstränge weitgehend vom Kühlwasser befreit sind. Danach noch an den Kunststoffsträngen anhaftendes Restwasser wird mittels im Boden der Entwässerungsstrecke angeordnete Eintrittsdüsen über einen Gasstrom dadurch getrocknet, in dem dieser die Kunststoffstränge anhebt und an diesen vorbeifliesst.In such a known from DE 39 00 250 A1 Device are the plastic strands after Pass through a coolant section over a Drainage section dried, the bottom of which in essentially with a sieve and subsequently with a Water drainage is formed, whereby the Plastic strands largely free of cooling water are. Then still adhering to the plastic strands Residual water is in the bottom of the Drainage line arranged inlet nozzles above thereby drying a gas stream in which the Lifts plastic strands and flows past them.

Das Entwässern und Trocknen der Kunststoffstränge erfordert hierbei eine relativ lange Strangführungsbahn, so dass neben eines hohen apparativen Aufwandes auch ein erheblicher Raumbedarf erforderlich wird.Dewatering and drying the plastic strands requires a relatively long strand guideway, so that besides a high expenditure on equipment also a considerable space is required.

Bei einer weiteren aus der DE 40 26 337 A1 bekannten Vorrichtung sind zur Behandlung von Kunststoffsträngen ebenfalls Gasdüsen vorgesehen. Da eine Entwässerungsstrecke fehlt, dienen die Gasdüsen hier der Strangkühlung, in dem die Kunststoffstränge durch die aus Lochblechen austretenden Gasströme getragen und geführt werden.In another known from DE 40 26 337 A1 Device are for the treatment of plastic strands also provided gas nozzles. There one There is no drainage section, the gas nozzles are used for strand cooling here, in which the plastic strands through the emerging from perforated sheets Gas flows are carried and carried.

Gemäß DE 91 04 417 U ist eine Maschine zum Reinigen von Flachmaterial bekannt. Das zu reinigende Flachmaterial wird von einer Positioniereinrichtung über eine Waschzone zu einer Trocknungseinrichtung transportiert. Die Trocknungseinrichtung umfaßt zwei im Abstand zueinander angeordnete, das Flachmaterial beidseits mit Warmluft beaufschlagende Schlitzdüsenpaare. Deren gegen die etwa horizontale Durchlaufrichtung gerichtete Blasrichtung schließt einen Winkel von ca. 45° zur Durchlaufrichtung ein. Die Schlitzdüsen der Schlitzdüsenpaare sind um eine rückseitige Schwenkachse schwenkbar gelagert. Im Bereich ihrer Blasschlitze liegen sie über ein gerundetes Gleitelement auf der unteren und oberen Oberfläche des gereinigten Flachmaterials auf. Beide Schlitzdüsenpaare sind vorzugsweise identisch ausgebildet.According to DE 91 04 417 U is a machine for cleaning flat material known. The flat material to be cleaned is supplied by a positioning device transported to a drying facility via a washing zone. The drying device comprises two spaced-apart, the flat material with hot air on both sides Slit nozzle pairs. Their against the roughly horizontal direction of travel directed blowing direction closes an angle of approx. 45 ° to the direction of flow a. The slit nozzles of the slit nozzle pairs are around a rear Swivel axis pivotally mounted. Are in the area of their blowholes a rounded sliding element on the lower and upper surface of the cleaned flat material. Both slit nozzle pairs are preferably of identical design.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der gattungsgemäßen Art so auszugestalten, daß bei geringem Bauaufwand eine einheitliche, hochwirksame Trocknungswirkung sämtlicher Kunststoffstränge ermöglicht wird.The invention has for its object a device of the generic type To be designed in such a way that, with little construction effort, a uniform, highly effective drying effect of all plastic strands is made possible.

Die Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Patentanspruches 1 angegebenen Merkmale erreicht.The object is achieved by the in the characterizing part of Claim 1 specified features achieved.

Hierbei wird durch die gegen die Kunststoffstränge gezielt gerichteten Luftströme eine optimale Beseitigung von an den Kunststoffsträngen anhaftendem Oberflächenwasser erzielt. Here is directed against the plastic strands Air flows an optimal removal of adhering to the plastic strands Surface water achieved.

Durch die über beide Düsenreihen bewirkte hohe Blaskraft, die messerartig längs einer Linie der Strangführungsbahn auf die Kunststoffstränge trifft, wird eine gleichmäßige Luftströmung über die gesamte Bahnbreite der Kunststoffstränge erzielt. Die Anordnung ermöglicht relativ hohe Luftströmungen bei geringem Luftverbrauch. Überraschend zeigte sich auch, daß durch die in ihrer Richtung gezielt auf die Kunststoffstränge auftreffenden Luftströme praktisch keine Verwirbelungen auftreten und demzufolge ein geringstmöglicher Geräuschpegel erreicht ist.
Bei fest im Druckluftrohr eingesetzten Blasdüsen ist vorteilhaft eine gezielte Blasrichtung des insgesamt austretenden Luftstromes erreicht.
Due to the high blowing force caused by the two rows of nozzles, which strikes the plastic strands along a line of the strand guide track, a uniform air flow is achieved over the entire web width of the plastic strands. The arrangement enables relatively high air flows with low air consumption. Surprisingly, it was also found that the air streams striking the plastic strands in their direction caused practically no turbulence and consequently the lowest possible noise level was achieved.
In the case of blowing nozzles permanently inserted in the compressed air pipe, a targeted blowing direction of the total air flow emerging is advantageously achieved.

In einer weiteren Ausbildung nach Anspruch 3 können beide Düsenreihen an ein bestimmtes Produkt angepasst, bzw. auf einen entsprechend unterschiedlich vorliegenden Gehalt der Oberflächenfeuchte fest eingestellt werden, in dem ihr Anstellwinkel schräg zur Strangführungsbahn verändert wird.In a further training according to claim 3 both rows of nozzles adapted to a specific product, or a correspondingly different one Surface moisture content can be fixed, in which their angle of attack is at an angle to the strand guideway is changed.

Eine Weiterbildung der Erfindung nach Anspruch 4 ermöglicht im Bedarfsfalle eine leichte Zugänglichkeit zur Strangführungsbahn, insbesondere zum Zwecke der Reinigung bzw. des Austausches von Teilen der Trocknungsvorrichtung.
Nach den Merkmalen des Anspruches 5 ist in raumsparender Bauweise eine unproblematische Ausleitung der eingetragenen Blasluft und des abzuscheidenden Kühlwasser sichergestellt. Zur Vereinfachung des Aufbaus der Blasdüsenreihen können in einer Weiterbildung nach Anspruch 6 vorteilhaft Bauteile Verwendung finden, die in Form einer Mehrfachdüse ausgebildet sind.
A further development of the invention according to claim 4 enables easy access to the strand guideway if necessary, in particular for the purpose of cleaning or replacing parts of the drying device.
According to the features of claim 5, a problem-free discharge of the blown air and the cooling water to be separated is ensured in a space-saving design. To simplify the structure of the rows of blowing nozzles, components which are designed in the form of a multiple nozzle can advantageously be used in a development according to claim 6.

Durch die Weiterbildung der Erfindung nach Anspruch 7 wird in einfacher Weise sichergestellt, dass die einzelnen Kunststoffstränge durch optimale Führung einer Vorentwässerung zugeführt werden. Hierdurch ist auch sichergestellt, dass die gesamte Oberfläche der einzelnen Kunststoffstränge einer Trocknung unterliegt.By developing the invention according to claim 7 it is easily ensured that the individual plastic strands through optimal guidance of a Pre-drainage can be supplied. This is also ensured that the entire surface of each Plastic strands are subject to drying.

Dem Schutz der Blasdüsen dient eine weitere Ausgestaltung der Erfindung nach Anspruch 8. Hierdurch, wie auch in einer Weiterbildung nach Anspruch 9, ist sichergestellt, dass eine unverändert gleich gute Trocknungswirkung für die Kunststoffstränge erzielt wird, auch bei unterschiedlichen Kunststoffen bzw. Aussenabmessungen der Kunststoffe.
Um die erfindungsgemässe Vorrichtung auch in den Fällen einsetzen zu können, wo die Kunststoffstränge leicht zur Bildung eines Wulstes eingangs der Strangführungsbahn neigen, ist in Weiterbildung der Erfindung eine selbsttätige Anhebung des oberhalbs der Strangführungsbahn angeordneten Prallbleches durch einen derartigen Wulst vorgesehen. Damit ist über den Schutz der Blasdüsen hinausgehend auch ein kontinuierlicher Strangdurchlauf zur Wulstbildung neigender Kunststoffe sichergestellt.
A further embodiment of the invention according to claim 8 serves to protect the blowing nozzles. This, as in a further development according to claim 9, ensures that an equally good drying effect is achieved for the plastic strands, even with different plastics or external dimensions of the plastics.
In order to be able to use the device according to the invention also in cases where the plastic strands tend to form a bead at the entrance of the strand guide track, in a further development of the invention an automatic raising of the baffle plate arranged above the strand guide track is provided by such a bead. In addition to the protection of the blow nozzles, this also ensures a continuous strand run for plastics that tend to bulge.

Weitere Einzelheiten und Vorteile nach der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung.Further details and advantages according to the invention result from the following description of Exemplary embodiments with reference to the drawing.

Hierbei zeigen:

Fig. 1
eine Prinzipdarstellung der Strangführung von Kunststoffsträngen ausgehend von der Strangerzeugung und strangkühlung
Fig. 2
eine Vorrichtung nach der Erfindung seitlich von der Strangführungsbahn gesehen in einer ersten Ausführung
Fig. 3
die Vorrichtung nach Fig.2 in Richtung der Strangführung gesehen in aufgeklapptem Zustand
Fig. 4
eine Aufsicht der Vorrichtung nach Fig. 3 ohne Aufklappteil
Fig. 5
eine weitere mit einer Schutzvorrichtung versehene Ausführung nach der Erfindung seitlich von der Strangführungsbahn her gesehen.
Here show:
Fig. 1
a schematic representation of the strand guide of plastic strands based on the strand production and strand cooling
Fig. 2
a device according to the invention seen laterally from the strand guideway in a first embodiment
Fig. 3
the device of Figure 2 seen in the direction of the strand guide in the opened state
Fig. 4
a top view of the device of FIG. 3 without opening part
Fig. 5
a further embodiment provided with a protective device according to the invention seen laterally from the strand guideway.

Die Prinzipdarstellung in Fig. 1 zeigt die Führung eines flachen Bündels von Kunststoffsträngen 4 ausgehend von einer Extruderdüse 2 eines Extruders 3 durch eine Kühlflüssigkeitsstrecke 5 eines Kühlbades 6 zu einer Trocknungsvorrichtung 1.
Innerhalb der Trocknungsvorrichtung 1 wird das Strangbündel 4 über Walzen 10 den Blasdüsen 7 bzw. 8 zugeführt, die oberhalb und unterhalb der Bahnebene 9 der Kunststoffstränge 4 angeordnet sind. Die Blasdüsen 7,8 bestehen aus einer Reihe nebeneinander angeordneter Einzeldüsen die schräg zur Strangführungsbahn blasen, wie dies nachstehend noch näher erläutert ist.
1 shows the guiding of a flat bundle of plastic strands 4 starting from an extruder nozzle 2 of an extruder 3 through a cooling liquid section 5 of a cooling bath 6 to a drying device 1.
Within the drying device 1, the strand bundle 4 is fed via rollers 10 to the blowing nozzles 7 and 8, respectively, which are arranged above and below the web plane 9 of the plastic strands 4. The blowing nozzles 7, 8 consist of a row of individual nozzles arranged next to one another which blow at an angle to the strand guiding path, as will be explained in more detail below.

Die Trocknungsvorrichtung 1 besteht wie Fig. 2 und die Fig. 3 zeigen aus einem Gestell 11 mit oberen Trägern 12, 12a und unteren Trägern 13, 13a.
Zwei Zwischenträger 15, 15a im Gestell 11 dienen zur drehbeweglichen Aufnahme der Walzen 10 in Führungszapfen 14.
Für die Führung der einzelnen Kunststoffstränge 4 in einer Bahnebene 9 sind die Walzen 10 auf ihrer Mantelfläche mit Aufnahmerillen 16 versehen, geeeignet zur Aufnahme von Kunststoffsträngen mit ca. 3- 4mm Strangdurchmesser.
An den beiden oberen Trägern 12,12a und den beiden unteren Trägern 13,13a ist zur Aufnahme und für die Versorgung von Blasdüsen 7,8 mit Druckluft jeweils ein Druckluftrohr 17 bzw. 18 befestigt. Beide Druckluftrohre 17,18 sind mittels Manschetten 19 und Schraubverbindungen 20 an den Trägern 12,12a,13,13a befestigt und in ihrer Drehwinkelstellung zur Bahnebene 9 beliebig festsetzbar. Dabei können die Blasdüsen 7 bzw. 8, die in einer Vielzahl von Lochdüsen von ca. 1mm Durchmesser am Druckluftrohr 17 bzw. 18 in einer Reihe gleichgerichtet angeordnet sind, in ihrer Winkelstellung zur Bahnebene 9 beliebig festgesetzt werden. Hierdurch erzeugen die Blasdüsen 7,8 einen gezielten messerartig auf die Kunststoffstränge 4 einwirkenden Luftstrom ohne Verwirbelungen. Eine gleichgerichtete Anstellung der Blasdüsen 7,8 ist dadurch vereinfacht, wenn wie gezeigt, Mehrfachdüsen 24 Anwendung finden, die einzeln mit bis zu 16 Lochdüsen 45 ausgebildet sind.
The drying device 1 consists like FIG. 2 and FIG. 3 show a frame 11 with upper supports 12, 12a and lower supports 13, 13a.
Two intermediate supports 15, 15a in the frame 11 serve for rotatably accommodating the rollers 10 in guide pins 14.
To guide the individual plastic strands 4 in a web plane 9, the rollers 10 are provided on their outer surface with receiving grooves 16, suitable for receiving plastic strands with a diameter of about 3-4 mm.
On the two upper supports 12, 12a and the two lower supports 13, 13a, a compressed air tube 17 or 18 is fastened for receiving and for supplying blowing nozzles 7, 8 with compressed air. Both compressed air pipes 17, 18 are fastened to the supports 12, 12a, 13, 13a by means of sleeves 19 and screw connections 20 and can be fixed as desired in their angular position in relation to the plane 9 of the web. The blowing nozzles 7 and 8, which are arranged in a row in the same direction in a plurality of perforated nozzles of approximately 1 mm in diameter on the compressed air tube 17 and 18, can be arbitrarily fixed in their angular position to the web plane 9. In this way, the blowing nozzles 7, 8 generate a targeted air flow acting on the plastic strands 4 in a knife-like manner without turbulence. A rectified adjustment of the blowing nozzles 7, 8 is simplified if, as shown, multiple nozzles 24 are used, which are individually designed with up to 16 perforated nozzles 45.

Der Anschluss der Blasdüsen 7,8 bzw. der Mehrfachdüsen 24 erfolgt dadurch, dass diese in Anschlussbohrungen der Druckluftrohre 17,18 fest eingesetzt sind. Hierzu ist beispielsweise jede Mehrfachdüse 24 mit einem Rohrstück 21 und einer Manschette 22 zur Befestigung an den Druckluftrohren 17,18 ausgebildet.
Um die Kunststoffstränge 4 von Oberflächenwasser zu befreien werden diese in geringem Abstand an den Blasdüsen 7,8 vorbei geführt.
In Abhängigkeit von der Art und Form der zu trocknenden Kunststoffstränge 4 wird der über die Blasdüsen 7,8 ausgetragene Luftstrom unter einem definierten Winkel α entgegen der Transportrichtung 25 der Kunststoffstränge 4 auf die Oberfläche des Produkts gerichtet. In den weitaus meisten Fällen ist hierfür eine Winkelstellung in einer Senkrechten zur Bahnebene 9 unter 30-60°, vorzugsweise 45° von Vorteil. Zur Optimierung der Trocknungswirkung ist der in Transportrichtung 25 der Kunststoffstränge 4 eingangsseitigen Walze 10 über die gesamte Breite der Bahnebene 9 eine Bürstenleiste 23 vorgeordnet. Die Bürstenleiste 23 ist am oberen Träger 12,12a befestigt und durchdringt mit ihrer Bürste die Bahnebene 9, wobei das Oberflächenwasser rings der Kunststoffstränge 4 grob abgestreift wird.
Hierbei fällt das von den Kunststoffsträngen 4 abgestreifte sowie das von den Blasdüsen 7,8 abgeblasene Oberflächenwasser in einen wannenförmigen Auffangbehälter 26, der an den unteren Trägern 13,13a im Gestell 11 fest eingehängt ist. Im Auffangbehälter 26 wird das Wasser von der Blasluft getrennt. Eine Öffnung 27 im Auffangbehälter 26 ermöglicht den erforderlichen Blasluft-Austritt.
Die Zuführung der Blasluft zu den Druckluftrohren 17,18 erfolgt über eine Druckluftzuführung 28. Der Erzeugung der Blasluft dient ein mit einem Antriebsmotor 29 verbundenes Seitenkanalgebläse 30, das über die Druckluftzuführung 28 den Blasdüsen 7,8 Druckluft von ca. 400 mbar zuführt.
Die oberen Träger 12,12a sind mittels Scharniergelenk 31 einseitig klappbar, so dass ein ausreichender Zugang zu den Walzen 10 und und den Blasdüsen 7,8 ermöglicht ist. Dabei kann die Führung der Kunststoffstränge 4 kontrolliert und die ordnungsgemässe Funktion der Blasdüsen 7,8 überprüft werden.
The connection of the blowing nozzles 7, 8 or the multiple nozzles 24 takes place in that they are firmly inserted in connection bores of the compressed air pipes 17, 18. For this purpose, for example, each multiple nozzle 24 is designed with a pipe section 21 and a sleeve 22 for attachment to the compressed air pipes 17, 18.
In order to free the plastic strands 4 from surface water, they are guided past the blow nozzles 7, 8 at a short distance.
Depending on the type and shape of the plastic strands 4 to be dried, the air stream discharged via the blowing nozzles 7, 8 is directed onto the surface of the product at a defined angle α against the transport direction 25 of the plastic strands 4. In the vast majority of cases, an angular position perpendicular to the plane 9 of the web at 30-60 °, preferably 45 °, is advantageous for this. To optimize the drying effect, a brush strip 23 is arranged upstream of the roller 10 on the input side in the transport direction 25 of the plastic strands 4 over the entire width of the web plane 9. The brush strip 23 is fastened to the upper carrier 12, 12a and penetrates the web plane 9 with its brush, the surface water around the plastic strands 4 being roughly stripped off.
In this case, the surface water stripped off from the plastic strands 4 and the surface water blown off by the blowing nozzles 7, 8 falls into a trough-shaped collecting container 26, which is firmly attached to the lower supports 13, 13a in the frame 11. In the collecting container 26, the water is separated from the blown air. An opening 27 in the collecting container 26 enables the required blown air outlet.
The blown air is supplied to the compressed air pipes 17, 18 via a compressed air supply 28. The blown air is generated by a side-channel blower 30 connected to a drive motor 29, which blowers 7,8 supply compressed air of approximately 400 mbar to the blower nozzles 28 via the compressed air supply 28.
The upper supports 12, 12a can be folded on one side by means of a hinge joint 31, so that sufficient access to the rollers 10 and and the blowing nozzles 7, 8 is made possible. The guidance of the plastic strands 4 can be checked and the proper functioning of the blowing nozzles 7, 8 can be checked.

Zum Schutz der Blasdüsen 7,8 vor Beschädigung dient eine diesen unmittelbar vorgeordnete Schutzvorrichtung, die aus einem oberen und einem unteren Prallblech 33,34 gebildet ist. Sie sind unter einem Winkel gegeneinander gestellt, dessen Schenkel entgegen der Transportrichtung 25 geöffnet sind.A serves to protect the blowing nozzles 7,8 from damage this immediately upstream protective device, the from an upper and a lower baffle plate 33, 34 is formed. They are at an angle to each other posed, the legs against the direction of transport 25 are open.

Beide Prallbleche 33,34 sind jeweils mittels verstellbarer Laschen 35,36 am oberen bzw. unteren Träger 12,13 über Befestigungsmittel 44 verbunden. Dabei kann die Position der Prallbleche 33,34 der gewählten Winkelstellung der Blasdüsen 7,8 entsprechend angepasst werden. Ihr Abstand voneinander im Bereich der Bahnebene 9 entspricht etwa dem gegenseitigen Abstand der Blasdüsenreihen 7,9.Both baffle plates 33, 34 are each means adjustable straps 35,36 on the upper and lower Carrier 12, 13 connected via fastening means 44. The position of the baffle plates 33, 34 can selected angular position of the blowing nozzles 7.8 accordingly be adjusted. Your distance from each other in the area of Path level 9 corresponds approximately to the mutual distance of the blow nozzle series 7.9.

Eine weitere Ausführung zur Sicherung der Blasdüsen 7,8 innerhalb der Bahnführung der Kunststoffstränge 4 zeigt Fig. 5. Hier besteht die Schutzvorrichtung ebenfalls aus einem oberen Prallblech 37 und einem unteren Prallblech 38 zwischen denen die Kunststoffstränge 4 hindurchgeführt sind. Das untere Prallblech 38 ist am unteren Träger 13 festgeschraubt, während das obere Prallblech 37 mittels einer Parallelführung 32 nach oben wegschwenkbar ist. Zu diesem Zweck sind die Streben 39,40 der Parallelführung 32 über Laschen 41,42 mit dem Gestell 11 gelenkig verbunden. Da die oberen Blasdüsen 7 und das zugehörige Druckluftrohr 17 an der Strebe 40 der Parallelführung 32 befestigt sind, sind die Blasdüsen 7 gemeinsam mit dem oberen Prallblech nach oben wegschwenkbar. Dadurch ist sichergestellt, dass bei unregelmässiger Strangführung, z.B. einer Ausbildung von Strangwülsten, die Blasdüsen 7, bzw. 8 unbeschädigt bleiben. Durch selbsttätiges Anheben des Prallbleches 37 über ankommende Strangwülste, werden diese frei durch die beiden Blasdüsen 7,8 hindurchgeführt.
Ein mit der Lasche 42 verbundenes Gegengewicht 43 sorgt dafür, dass die erforderliche Kraft zum Anheben der oberen Blasdüsen 7 eingestellt werden kann.
A further embodiment for securing the blowing nozzles 7, 8 within the path of the plastic strands 4 is shown in FIG. 5. Here, the protective device also consists of an upper baffle plate 37 and a lower baffle plate 38 between which the plastic strands 4 are passed. The lower baffle plate 38 is screwed onto the lower support 13, while the upper baffle plate 37 can be pivoted upwards by means of a parallel guide 32. For this purpose, the struts 39, 40 of the parallel guide 32 are connected in an articulated manner to the frame 11 via tabs 41, 42. Since the upper blow nozzles 7 and the associated compressed air tube 17 are fastened to the strut 40 of the parallel guide 32, the blow nozzles 7 can be pivoted upwards together with the upper baffle plate. This ensures that the blow nozzles 7 and 8 remain undamaged in the event of irregular strand guidance, for example formation of strand beads. By automatically lifting the baffle plate 37 over incoming strand beads, these are passed freely through the two blowing nozzles 7, 8.
A counterweight 43 connected to the tab 42 ensures that the force required to lift the upper blowing nozzles 7 can be set.

Grundsätzlich bedeutsam ist, dass die Blasdüsen 7,8 die Bahnebene 9 in gleichem und geringem Abstand einschliessen. Durch die gleichgerichtete Anstellung der Blasdüsen 7 und 8 gegeneinander wird quer zur Bahnebene 9 eine gleichmässige Verteilung des Luftstromes mit definierter Richtung erzielt. Dabei erfolgt ein Abschälen des den Kunststoffsträngen 4 oberflächlich anhaftenden Wassers und dessen gezielte Trennung von den Kunststoffsträngen 4 durch Abtropfen in den Auffangbehälter 26, ohne Verwirbelung.It is basically important that the blowing nozzles 7,8 Track level 9 at the same and close distance lock in. By employing the Blowing nozzles 7 and 8 against each other are transverse to the plane of the web 9 with an even distribution of the air flow defined direction achieved. Here is a Peel the plastic strands 4 superficially adhering water and its targeted separation from the plastic strands 4 by dripping into the Collection container 26, without swirling.

Claims (10)

  1. An apparatus for the removal of surface water on plastic strands (4),
    a) which are supplied to a pelletizer after passing through a coolant section (5),
    b) with conveying means (10) mounted on a frame (11) for the guidance of the plastic strands (4) on a strand guiding path (9) in a conveying direction (25),
    c) with several first blowing nozzles (7) disposed above, and at an angle to, the strand guiding path (9) for the actuation of the strand surfaces by an air jet, and
    d) with several second blowing nozzles (8) disposed below, and at an angle to, the strand guiding path (9) in the form of hole-type nozzles (45) for the actuation of the strand surfaces by an air jet, characterized in that
    e) the conveying means (10) are rollers (10), and
    f) in that the first blowing nozzles (7) are hole-type nozzles (45),
    g) the first and second blowing nozzles (7, 8)
    i) being disposed in a plane substantially perpendicular to the conveying direction (25), and at a small distance from the strand guiding path (9),
    ii) acting on the strand surfaces by an air jet counter to the conveying direction (25), and
    iii) each being disposed equidirectionally on air pipes (17, 18), which, above and below the strand guiding path (9), are fixed to upper and lower beams (12, 12a, 13, 13a) of the frame (11) and which are connected with a side-channel blower (30), and each forming an air curtain, both air curtains having a joint point of intersection within the strand guiding path (9).
  2. An apparatus according to claim 1, characterized in that the blowing nozzles (7, 8) are fixed and inserted in supply drill holes formed in the air pipe (17, 18), blowing counter to the conveying direction of the plastic strands (4) at an angle α of 30° to 60°, preferably approximately 45°, relative to the normal of the path.
  3. An apparatus according to one of claims 1 and 2, characterized in that the air pipes (17, 18) are pivotally mounted on beams (12, 12a and 13, 13a, respectively) of the frame (11) and, by a compressed air supply (28), are connected with a compressed air generator in the form of a side-channel blower (30) disposed in the base portion of the frame.
  4. An apparatus according to claim 3, characterized in that the beam (12a) disposed above the strand guiding path is pivotally lodged in a hinge (31) mounted on the frame (11) on the strand exit side.
  5. An apparatus according to one of claims 1 to 4 comprising a troughshaped collecting tank (26) for the discharge of coolant and provided closely below the guiding path and fixed to the frame (11), characterized in that the collecting tank (26) is formed to have a vent opening (27).
  6. An apparatus according to claim 1, characterized by the use of a number of a component in the form of a multinozzle (24) having several blowing nozzles (7, 8) disposed in a line.
  7. An apparatus according to claim 1, characterized in that the strand guiding path consists of a roller path comprising at least two rollers (10), which are individually and adjacently allocated to the blowing nozzles (7, 8), and the surface area of which has receiving grooves (16) for the plastic strands (4), a brush strip (23) being allocated to the roller (10) on the inlet side in the conveying direction.
  8. An apparatus according to claim 1, characterized in that the blowing nozzles (7, 8), at right angles to the strand guiding path, are directly topped by a shielding which consists in each case of a deflector plate (33, 34) tightly connected with the upper and lower beams (12, 12a, 13, 13a) by way of fastening means (44) provided with straps (35, 36).
  9. An apparatus according to claim 8, characterized in that by way of the fasteners (44), the deflector plates (33, 34) are adjustable in their distance from the strand guiding path.
  10. An apparatus according to claim 8, characterized in that the deflector plate (37), which is disposed upstream of the upper blowing nozzles (7) above the strand guiding path, can be elevated automatically, together with the blowing nozzles (7), by way of a parallel guide (32) that is articulated to the frame (11).
EP94115899A 1993-11-08 1994-10-20 Apparatus for removing surface water from plastic strands Expired - Lifetime EP0652411B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4338032 1993-11-08
DE4338032A DE4338032C2 (en) 1993-11-08 1993-11-08 Device for removing surface water from plastic strands

Publications (2)

Publication Number Publication Date
EP0652411A1 EP0652411A1 (en) 1995-05-10
EP0652411B1 true EP0652411B1 (en) 1998-12-23

Family

ID=6502031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94115899A Expired - Lifetime EP0652411B1 (en) 1993-11-08 1994-10-20 Apparatus for removing surface water from plastic strands

Country Status (2)

Country Link
EP (1) EP0652411B1 (en)
DE (2) DE4338032C2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1283361B1 (en) * 1996-07-30 1998-04-17 Chiesa Carlo Consulenza E Prog CONTINUOUS SEMI-FINISHED DRYING DEVICE
DE20208362U1 (en) * 2002-05-29 2003-10-09 Hagen & Funke Gmbh V Device for dewatering strand material
DE102007027418A1 (en) * 2007-06-14 2008-12-18 Rieter Automatik Gmbh Strand granulator for granulating plastic strands
EP3294939B1 (en) * 2015-05-08 2019-05-01 Thies GmbH & Co. KG Method for the treatment of a textile substrate, and devices for carrying out said method
CN105674718B (en) * 2016-01-19 2018-03-16 江苏杭钢精密铝业有限公司 A kind of Flat tubular element blow dried device
CN105538649B (en) * 2016-01-30 2017-11-07 东莞市三优塑料机械制造有限公司 Plastic bracing air-dry machine and its air-dry method
CN112284111A (en) * 2020-10-30 2021-01-29 安徽骏泰塑业科技有限公司 Traction type plastic plate drying device

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2351549A (en) * 1941-10-16 1944-06-13 Proctor & Schwartz Inc Method for treating filaments and threads
DE1176346B (en) * 1952-09-29 1964-08-20 Exxon Research Engineering Co Process for granulating thermoplastic material
GB894237A (en) * 1959-07-09 1962-04-18 Ameliorair Soc Improvements in drying apparatus for products in the form of a sheet permeable to gases
US3579853A (en) * 1968-12-05 1971-05-25 Joseph J Martino Circuit board drier
US3680218A (en) * 1969-05-07 1972-08-01 Owens Corning Fiberglass Corp Drying chamber apparatus and method
US3910320A (en) * 1972-05-26 1975-10-07 Eastman Kodak Co Tow dewatering jet device
IT1022404B (en) * 1973-10-13 1978-03-20 Scheer & Cie C F DEVICE FOR DRYING SYNTHETIC MATERIAL CORDS DURING THE PREPARATION OF SYNTHETIC MATERIAL GRANULATE
US4017982A (en) * 1975-07-28 1977-04-19 Chemcut Corporation Drying apparatus
US4117604A (en) * 1977-03-31 1978-10-03 Pako Corporation Dryer for photographic processors
IT8423839V0 (en) * 1984-11-20 1984-11-20 Bovone Vittorio DEVICE FOR AUTOMATIC ADAPTATION TO THE THICKNESS OF GLASS SLABS IN THE PRODUCTION OF INSULATING GLASS MIRRORS AND LAMINATED GLASS.
DE3614631A1 (en) * 1986-04-30 1987-12-03 Niehoff Kg Maschf DEVICE FOR DRYING DAMP EXTRACT, ESPECIALLY WIRE
DE3726606A1 (en) * 1987-08-11 1989-03-02 Guenter Hartig DEVICE FOR FEEDING AND COOLING STRINGS OF THERMOPLASTIC PLASTICS
DE3900250A1 (en) * 1989-01-05 1990-07-12 Hench Automatik App Masch DEVICE FOR COOLING, DRYING AND GRANULATING STRINGS
US4947559A (en) * 1989-04-06 1990-08-14 Bobst, Sa Air press system
DE4026371A1 (en) * 1990-08-21 1992-02-27 Daimler Benz Ag Deposition of quartz glass layer for use in optical fibres - consists of burning silicon-contg. volatile cpds. in flame which is directed at the substrate surface
CA2050543C (en) * 1990-09-26 1998-09-01 Thomas H. Jensen Method and apparatus for drying, curing and supporting a coated strand
DE9104417U1 (en) * 1991-04-11 1991-07-04 Graul, Arno, 7130 Muehlacker, De

Also Published As

Publication number Publication date
DE59407533D1 (en) 1999-02-04
DE4338032A1 (en) 1995-05-11
DE4338032C2 (en) 1995-08-31
EP0652411A1 (en) 1995-05-10

Similar Documents

Publication Publication Date Title
EP0573885B1 (en) Rapid packager drier dor drying sludge with a filtering arrangement
EP0495949B1 (en) Device for cooling and granulating molten strands
DE2942079C2 (en) Device for wet treatment, in particular for dyeing, of endless, rope-like textile goods
DE4110127A1 (en) NOZZLE ASSEMBLY FOR SPRAYING LIQUIDS
EP1039006A1 (en) Method and apparatus for making perforated nonwovens by means of hydrodynamic needling
DE2707536A1 (en) DEVICE FOR APPLYING LIQUID TO MOVING MATERIAL
DE102011087350A1 (en) Melt spinning device and melt spinning process
EP0652411B1 (en) Apparatus for removing surface water from plastic strands
DE3726606A1 (en) DEVICE FOR FEEDING AND COOLING STRINGS OF THERMOPLASTIC PLASTICS
DE1811435A1 (en) Method and device for toughening glass panes
DE2826118A1 (en) DEVICE FOR APPLYING LIQUID TO MOVING MATERIAL
DE3815211C2 (en)
DE2918833C2 (en) Device for drying and shrinking textile knitted goods
DE2256087B2 (en) Device for drying a web of material lying on an essentially flat support
EP0958977A2 (en) Cleaning assembly for body of vehicles
EP1358993B1 (en) Apparatus for welding webs of plastic material
EP0408944B1 (en) Device for conveying a preferably multilayered web of thermoplastic synthetic material
EP0979985A2 (en) Apparatus for the heat treatment of a web
DE3421587C2 (en)
EP3362329B1 (en) Vehicle washing system
DE3807483A1 (en) Device for uniform laying down of the filaments in the manufacture of a bonded fabric using the direct method
DE3710450A1 (en) METHOD AND DEVICE FOR COOLING ROLLING GOODS IN WATER COOLING ROUTES
DE19644499C2 (en) Drying device and method for drying crockery parts and / or trays in a continuous dishwasher
DE19803676A1 (en) Device for the heat treatment of a textile web
AT383578B (en) METHOD FOR PRODUCING GLASS FIBER MATS FROM MULTIPLE FIBER-LOADED GAS FLOWERS AND DEVICE FOR IMPLEMENTING THE METHOD

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19950531

17Q First examination report despatched

Effective date: 19970402

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KRUPP WERNER & PFLEIDERER GMBH

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59407533

Country of ref document: DE

Date of ref document: 19990204

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990301

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20051010

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20051014

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20061031

Year of fee payment: 13

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20061020

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061020

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071020

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131021

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59407533

Country of ref document: DE