WO2011057929A1 - Device and method for longitudinally stretching a film web - Google Patents
Device and method for longitudinally stretching a film web Download PDFInfo
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- WO2011057929A1 WO2011057929A1 PCT/EP2010/066716 EP2010066716W WO2011057929A1 WO 2011057929 A1 WO2011057929 A1 WO 2011057929A1 EP 2010066716 W EP2010066716 W EP 2010066716W WO 2011057929 A1 WO2011057929 A1 WO 2011057929A1
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- Prior art keywords
- film web
- roller
- transport
- stretching
- transport roller
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Classifications
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- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
- B29C55/065—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed in several stretching steps
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/91—Heating, e.g. for cross linking
-
- 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
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling drums
Definitions
- the invention relates to a device for longitudinal stretching of a film web according to the preamble of claim 1 and to a corresponding method according to the preamble of claim 6.
- thermoplastic films With the stretching of thermoplastic films, their properties can be specifically changed. Such properties are, for example, transparency or strength. Such stretching, which can take place in the transverse and / or longitudinal direction of the film web, can take place inline directly after the extrusion process. However, the extruded film may also initially be wound up and fed to the apparatus for longitudinal stretching after a new development ("offline processing").
- WO 2006/063641 A1 shows in its FIGURE 1 such a device, in this case multi-stage, apparatus for longitudinal stretching Characteristic of such a device are:
- At least one heating device in which the film web is heatable in which the film web is heatable
- At least one stretching unit in which the film web is stretchable in its longitudinal direction wherein the stretching unit comprises a first transport roller which has a first peripheral speed in the stretching operation and a, seen along the transport path of the film web, the first transport roller following second transport roller with a second peripheral speed wherein the second peripheral speed is greater than the first transport speed.
- such devices also include annealing or annealing rolls, which are positioned between the stretching unit and the cooling rollers. These rollers often already have a lower temperature than the heating rollers, but are tempered so that they avoid too rapid cooling of the film. The difference between chill rolls and annealing rolls is often made because of the hot oil annealing rolls and the water chill rolls.
- film webs are preferably processable from thermoplastic materials such as polystyrene, polypropylene or polyethylene.
- the object of the present invention is therefore to propose an apparatus and a method with which film webs can be produced with a lower thickness variance.
- a further deflection roller in the transport path of the film web between the first and the second transport roller can be introduced.
- this guide roller runs the film web with a certain angle of wrap, which is less than 90 degrees, preferably less than 45 degrees and in particular less than 30 degrees.
- the invention is based on the observation that in devices of the prior art in the region between the first and the second transport roller, which is also referred to as a stretching gap, the film web becomes narrower (so-called neck-in). In conjunction with this, the thickness of the film web, in particular at its edges, increases. However, if the film web now runs over another deflection roller, then the film is fixed on this roller and can not become narrower. The introduction of a further deflection roller has shown that the variance in the film thickness can be limited.
- the further deflection roller may be at least partially coated with an elastomeric material such as rubber or silicone rubber. This improves the fixation of the film web.
- a drive is provided, with which the further deflection roller can be driven.
- the rotational speed of the guide roller can be controlled or regulated.
- the further deflection roller is displaceable relative to the first and / or to the second transport roller.
- the guide roller can be arranged linearly displaceable in the machine frame.
- the deflection roller is rotatably mounted in a lever arm, wherein the lever arm can be mounted in the machine frame and can be pivoted relative thereto.
- the direction of rotation of the second transport roller is reversible.
- another transport path of the film web with respect to the transport path, in which no deflection roller is introduced into this be provided. This avoids too long, free transport of the film web, in which the neck-in effect could be enhanced. Further embodiments of the invention will become apparent from the description and the claims.
- Fig. 1 is a device for longitudinal stretching of a film web after the
- FIG. 2 Enlarged view of a part of FIG. 1
- FIG. 3 view according to Figure 2, after the guide roller in the
- Transport path of the film web was introduced.
- FIG. 4 view according to Figure 3, but with representation of a
- Displacement mechanism Fig. 1 shows a device 1 for longitudinal stretching of a film web 2, which is guided along a transport path in the transport direction 3.
- the film web 2 is fed by an extrusion device or an unwinding device.
- the film web passes a guide roller 5, before they in the heater 4 successively four heating rollers 6, which are temperature-controlled, running.
- the stretching unit 8 comprises transport rollers 9, 10, 11, 12, wherein the roller pairs 9 and 10 and the pairs of rollers 11 and 12 each form a so-called stretching gap.
- the rollers 10 and 12 each have a greater circumferential speed than their associated rollers 9 and 1 first However, the rollers 10 and 11 may have the same peripheral speed.
- Each of the four transport rollers mentioned may be assigned a pressure roller 13, which in each case ensures that the film web 2 rests firmly on the transport rollers and does not slip.
- the film web 2 is guided over the cooling rollers 16.
- the so-called annealing rollers may be provided, which have already been described above, but are not shown here.
- the film web 2 After the film web 2 has passed two further guide rollers 18 and 19, it can be fed to a winding device or any further processing device.
- a guide roller 14 is additionally shown, which in the web path between the transport rollers 1 1 and 12 can be introduced.
- the transport rollers 1 1 and / or 12 may be slidably mounted to make room for the guide roller 14.
- the guide roller 14 may for this purpose comprise a sufficiently small diameter.
- FIG. 2 shows an enlarged detail from FIG. 1. It can be seen that the deflection roller 14 is not active. The directions of rotation of the rollers 1 1 and 12 are indicated by the arrows 21 and 22.
- FIG. 3 now shows the deflection roller 14 after it has been introduced into the transport path of the film web 2.
- the direction of rotation of the transport roller was reversed and is indicated by the arrow 22 '.
- the Wrap angle ⁇ with which the film web 2 wraps around the deflection roller 14, has a size of, for example, 40 degrees.
- the roller 13 can be used in this case as a deflection roller.
- FIG. 4 shows the same situation as FIG. 3.
- an embodiment of a displacement mechanism with which the roller 14 is displaceable, in the present case, displaceable relative to the transport roller 11 and / or the transport roller 12, is now shown.
- the guide roller 14 is rotatably mounted via a rotary joint in a pivot arm 23.
- the pivot arm 23 is rotatably mounted in a frame-fixed support 24.
- the piston rod 25 of a piston-cylinder unit 26 is rotatably mounted.
- the piston 27 of the piston-cylinder unit is rotatably supported on a further frame-fixed support 28.
- the film web 2 can be guided over desired transport paths through the stretching gap formed by the rollers 11 and 12.
- the transport path depending on the materials of which the film is made.
- high-quality films can be produced for many material combinations.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
Vorrichtung und Verfahren zum Längsrecken einer Folienbahn Apparatus and method for longitudinally stretching a film web
Die Erfindung betrifft eine Vorrichtung zum Längsrecken einer Folienbahn nach dem Oberbegriff des Anspruchs 1 sowie ein entsprechendes Verfahren nach dem Oberbegriff des Anspruchs 6. The invention relates to a device for longitudinal stretching of a film web according to the preamble of claim 1 and to a corresponding method according to the preamble of claim 6.
Mit dem Recken von thermoplastischen Folien können deren Eigenschaften gezielt verändert werden. Solche Eigenschaften sind beispielsweise die Transparenz oder die Festigkeit. Ein solches Recken, das in Quer- und/oder Längsrichtung der Folienbahn erfolgen kann, kann direkt nach dem Extrusionsprozess inline erfolgen. Die extrudierte Folie kann aber auch zunächst aufgewickelt und der Vorrichtung zum Längsrecken nach einer erneuten Abwicklung zugeführt werden („Offline-Verarbeitung"). Die Druckschrift WO 2006/063641 A1 zeigt in ihrer Figur 1 eine solche, in dem Fall mehrstufige, Vorrichtung zum Längsrecken einer Folienbahn. Charakteristisch für eine solche Vorrichtung sind: With the stretching of thermoplastic films, their properties can be specifically changed. Such properties are, for example, transparency or strength. Such stretching, which can take place in the transverse and / or longitudinal direction of the film web, can take place inline directly after the extrusion process. However, the extruded film may also initially be wound up and fed to the apparatus for longitudinal stretching after a new development ("offline processing"). WO 2006/063641 A1 shows in its FIGURE 1 such a device, in this case multi-stage, apparatus for longitudinal stretching Characteristic of such a device are:
- wenigstens eine Heizeinrichtung, in welcher die Folienbahn aufheizbar ist, at least one heating device in which the film web is heatable,
- wenigstens eine Abkühleinrichtung, in welcher die Folienbahn wieder abkühlbar ist, und - At least one cooling device in which the film web is cooled again, and
- wenigstens ein Reckwerk, in welcher die Folienbahn in ihrer Längsrichtung reckbar ist, wobei das Reckwerk eine erste Transportwalze, welche im Reckbetrieb eine erste Umfangsgeschwindigkeit aufweist und eine, entlang des Transportpfades der Folienbahn gesehen, der ersten Transportwalze folgende zweite Transportwalze mit einer zweiten Umfangsgeschwindigkeit umfasst, wobei die zweite Umfangsgeschwindigkeit größer ist als die erste Transportgeschwindigkeit. - At least one stretching unit in which the film web is stretchable in its longitudinal direction, wherein the stretching unit comprises a first transport roller which has a first peripheral speed in the stretching operation and a, seen along the transport path of the film web, the first transport roller following second transport roller with a second peripheral speed wherein the second peripheral speed is greater than the first transport speed.
In der Regel umfassen solche Vorrichtungen auch noch Annealing- oder Temperwalzen, die zwischen dem Reckwerk und den Kühlwalzen positioniert sind. Diese Walzen besitzen oft bereits eine niedrigere Temperatur als die Heizwalzen, sind jedoch derart temperiert, dass sie ein zu schnelles Abkühlen der Folie vermeiden. Der Unterschied zwischen Kühlwalzen und Annealingwalzen wird oft gemacht, weil die Annealingwalzen von heißem Öl und die Kühlwalzen von Wasser durchströmt werden. In general, such devices also include annealing or annealing rolls, which are positioned between the stretching unit and the cooling rollers. These rollers often already have a lower temperature than the heating rollers, but are tempered so that they avoid too rapid cooling of the film. The difference between chill rolls and annealing rolls is often made because of the hot oil annealing rolls and the water chill rolls.
Es ist eine Tatsache, dass der Großteil des eigentlichen Reckprozesses zwischen den eigentlichen Reckwalzen vorgenommen wird. Aufgrund der größeren Umfangsgeschwindigkeit der zweiten Transportwalze im Vergleich zur Umfangsgeschwindigkeit der ersten Transportwalze erfolgt das Längsrecken, das heißt eine Dehnung der Folienbahn in ihrer Transportrichtung. Gleichzeitig nimmt die Dicke der Folienbahn ab. In der Heizeinrichtung wird die Folienbahn jedoch zunächst aufgeheizt. Nachdem sie gereckt wurde, durchläuft die Folienbahn die Abkühleinrichtung, mit welcher die Folienbahn wieder auf eine Temperatur deutlich unterhalb der Plastifizierungstemperatur abkühlbar ist. Mit einer solchen Vorrichtung zum Längsrecken sind Folienbahnen vorzugsweise aus thermoplastischen Materialien wie Polystyrol, Polypropylen oder Polyethylen verarbeitbar. It is a fact that most of the actual stretching process is done between the actual stretching rolls. Due to the larger peripheral speed of the second transport roller in comparison to the peripheral speed of the first transport roller, the longitudinal stretching takes place, that is, an elongation of the film web in its transport direction. At the same time, the thickness of the film web decreases. In the heater, however, the film web is first heated. After being stretched, the film web passes through the cooling device, with which the film web can be cooled again to a temperature well below the plasticizing temperature. With such a device for longitudinal stretching, film webs are preferably processable from thermoplastic materials such as polystyrene, polypropylene or polyethylene.
Der eigentliche Reckprozess findet zwischen den beiden Transportwalzen statt, wobei dieser Prozess unmittelbar nach dem Lösen der Folie von der ersten Transportwalze einsetzt. Bei Dickenmessungen von Folienbahnen wurde jedoch festgestellt, dass die Dicken über die Querrichtung stark variieren. Das bedeutet, dass, über die Querrichtung gesehen, die Folienbahn unterschiedlich stark gereckt wurde. Folien mit unterschiedlichen Dicken über die Querrichtung sind jedoch oft nicht gewünscht. Die Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung und ein Verfahren vorzuschlagen, mit welchen Folienbahnen mit einer geringeren Dickenvarianz herstellbar sind. The actual stretching process takes place between the two transport rollers, this process starting immediately after the release of the film from the first transport roller. In thickness measurements of film webs, however, it was found that the thicknesses vary widely across the transverse direction. This means that, seen across the transverse direction, the film web was stretched to different degrees. However, films with different thicknesses across the transverse direction are often undesirable. The object of the present invention is therefore to propose an apparatus and a method with which film webs can be produced with a lower thickness variance.
Erfindungsgemäß wird diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. According to the invention, this object is solved by the features of the characterizing part of claim 1.
Demnach ist vorgesehen, dass eine weitere Umlenkwalze in den Transportpfad der Folienbahn zwischen der ersten und der zweiten Transportwalze einbringbar ist. Accordingly, it is provided that a further deflection roller in the transport path of the film web between the first and the second transport roller can be introduced.
Über diese Umlenkwalze läuft die Folienbahn mit einem gewissen Umschlingungswinkel, der kleiner als 90 Grad, vorzugsweise kleiner als 45 Grad und insbesondere kleiner als 30 Grad ist. About this guide roller runs the film web with a certain angle of wrap, which is less than 90 degrees, preferably less than 45 degrees and in particular less than 30 degrees.
Der Erfindung liegt die Beobachtung zugrunde, dass in Vorrichtungen des Standes der Technik im Bereich zwischen der ersten und der zweiten Transportwalze, der auch als Reckspalt bezeichnet wird, die Folienbahn schmaler wird (so genanntes Neck-in). Damit zusammenhängend erhöht sich die Dicke der Folienbahn insbesondere an ihren Rändern. Läuft nun die Folienbahn jedoch über eine weitere Umlenkwalze, so ist die Folie auf dieser Walze fixiert und kann nicht schmaler werden. Das Einbringen einer weiteren Umlenkwalze hat gezeigt, dass sich die Varianz in der Foliendicke einschränken lässt. The invention is based on the observation that in devices of the prior art in the region between the first and the second transport roller, which is also referred to as a stretching gap, the film web becomes narrower (so-called neck-in). In conjunction with this, the thickness of the film web, in particular at its edges, increases. However, if the film web now runs over another deflection roller, then the film is fixed on this roller and can not become narrower. The introduction of a further deflection roller has shown that the variance in the film thickness can be limited.
In einer vorteilhaften Ausgestaltung der Erfindung kann die weitere Umlenkwalze zumindest bereichsweise mit einem elastomeren Material wie beispielsweise Gummi oder Silikonkautschuk beschichtet sein. Damit wird die Fixierung der Folienbahn verbessert. In an advantageous embodiment of the invention, the further deflection roller may be at least partially coated with an elastomeric material such as rubber or silicone rubber. This improves the fixation of the film web.
Vorteilhaft ist es auch, wenn ein Antrieb vorgesehen ist, mit welchem die weitere Umlenkwalze antreibbar ist. Die Drehgeschwindigkeit der Umlenkwalze kann dabei Steuer- oder regelbar sein. Weiterhin ist es von Vorteil, wenn die weitere Umlenkwalze relativ zu der ersten und/oder zu der zweiten Transportwalze verlagerbar ist. Beispielsweise kann die Umlenkwalze in dem Maschinenrahmen linear verschiebbar angeordnet sein. Insbesondere ist es vorteilhaft, wenn die Umlenkwalze in einem Hebelarm drehbar gelagert ist, wobei der Hebelarm im Maschinengestell gelagert und relativ zu diesem verschwenkbar sein kann. It is also advantageous if a drive is provided, with which the further deflection roller can be driven. The rotational speed of the guide roller can be controlled or regulated. Furthermore, it is advantageous if the further deflection roller is displaceable relative to the first and / or to the second transport roller. For example, the guide roller can be arranged linearly displaceable in the machine frame. In particular, it is advantageous if the deflection roller is rotatably mounted in a lever arm, wherein the lever arm can be mounted in the machine frame and can be pivoted relative thereto.
In einer weiteren Ausgestaltung der Erfindung ist es vorgesehen, dass die Drehrichtung der zweiten Transportwalze umkehrbar ist. In diesem Fall kann ein anderer Transportpfad der Folienbahn gegenüber dem Transportpfad, bei dem keine Umlenkwalze in diesen eingebracht ist, vorgesehen werden. Damit wird ein zu langer, freier Transport der Folienbahn vermieden, bei dem der Neck-in- Effekt verstärkt werden könnte. Weitere Ausführungsbeispiele der Erfindung gehen aus der gegenständlichen Beschreibung und den Ansprüchen hervor. In a further embodiment of the invention, it is provided that the direction of rotation of the second transport roller is reversible. In this case, another transport path of the film web with respect to the transport path, in which no deflection roller is introduced into this, be provided. This avoids too long, free transport of the film web, in which the neck-in effect could be enhanced. Further embodiments of the invention will become apparent from the description and the claims.
Die einzelnen Figuren zeigen: The individual figures show:
Fig. 1 eine Vorrichtung zum Längsrecken einer Folienbahn nach dem Fig. 1 is a device for longitudinal stretching of a film web after the
Stand der Technik State of the art
Fig. 2 Vergrößerte Ansicht eines Teils der Figur 1 FIG. 2 Enlarged view of a part of FIG. 1
Fig. 3 Ansicht gemäß Figur 2, nachdem die Umlenkwalze in den Fig. 3 view according to Figure 2, after the guide roller in the
Transportpfad der Folienbahn eingebracht wurde. Transport path of the film web was introduced.
Fig. 4 Ansicht gemäß Figur 3, jedoch mit Darstellung eines Fig. 4 view according to Figure 3, but with representation of a
Verlagerungsmechanismus Fig. 1 zeigt eine Vorrichtung 1 zum Längsrecken einer Folienbahn 2, die entlang eines Transportpfades in der Transportrichtung 3 geführt wird. Die Folienbahn 2 wird von einer Extrusionseinrichtung oder einer Abwickelvorrichtung zugeführt. Zunächst passiert die Folienbahn eine Leitwalze 5, bevor sie in der Heizeinrichtung 4 nacheinander über vier Heizwalzen 6, die temperierbar sind, läuft. Nachdem die Folienbahn 2 auf diese Weise auf oder oberhalb der Plastifizierungstemperatur aufgeheizt wurde, wird sie in das Reckwerk 8 eingeführt. Das Reckwerk 8 umfasst Transportwalzen 9, 10, 1 1 , 12, wobei die Walzenpaare 9 und 10 und die Walzenpaare 1 1 und 12 jeweils einen so genannten Reckspalt ausbilden. Die Walzen 10 und 12 haben dabei jeweils eine größere Umfangsgeschwindigkeit als die ihnen zugeordneten Walzen 9 und 1 1 . Die Walzen 10 und 1 1 können allerdings dieselbe Umfangsgeschwindigkeit aufweisen. Jeder der vier genannten Transportwalzen kann eine Andrückwalze 13 zugeordnet sein, welche jeweils dafür Sorge trägt, dass die Folienbahn 2 fest auf den Transportwalzen aufliegt und nicht durchrutscht. Displacement mechanism Fig. 1 shows a device 1 for longitudinal stretching of a film web 2, which is guided along a transport path in the transport direction 3. The film web 2 is fed by an extrusion device or an unwinding device. First, the film web passes a guide roller 5, before they in the heater 4 successively four heating rollers 6, which are temperature-controlled, running. After the film web 2 has been heated in this way at or above the plasticizing temperature, it is introduced into the stretching unit 8. The stretching unit 8 comprises transport rollers 9, 10, 11, 12, wherein the roller pairs 9 and 10 and the pairs of rollers 11 and 12 each form a so-called stretching gap. The rollers 10 and 12 each have a greater circumferential speed than their associated rollers 9 and 1 first However, the rollers 10 and 11 may have the same peripheral speed. Each of the four transport rollers mentioned may be assigned a pressure roller 13, which in each case ensures that the film web 2 rests firmly on the transport rollers and does not slip.
In der Abkühleinrichtung 15 wird die Folienbahn 2 über die Abkühlwalzen 16 geführt. In der Abkühleinrichtung 15 können auch weitere Walzen, die so genannten Annealingwalzen vorgesehen sein, die bereits eingangs beschrieben wurden, hier aber nicht dargestellt sind. In the cooling device 15, the film web 2 is guided over the cooling rollers 16. In the cooling device 15 and other rollers, the so-called annealing rollers may be provided, which have already been described above, but are not shown here.
Nachdem die Folienbahn 2 zwei weitere Leitwalzen 18 und 19 passiert hat, kann sie einer Wickelvorrichtung oder einer beliebigen Weiterverarbeitungseinrichtung zugeführt werden. After the film web 2 has passed two further guide rollers 18 and 19, it can be fed to a winding device or any further processing device.
In der Figur 1 ist zusätzlich eine Umlenkwalze 14 dargestellt, welche in den Bahnweg zwischen den Transportwalzen 1 1 und 12 einbringbar ist. Gegebenenfalls können die Transportwalzen 1 1 und/oder 12 verschiebbar gelagert sein, um Platz für die Umlenkwalze 14 zu schaffen. Die Umlenkwalze 14 kann dazu einen ausreichend kleinen Durchmesser umfassen. In the figure 1, a guide roller 14 is additionally shown, which in the web path between the transport rollers 1 1 and 12 can be introduced. Optionally, the transport rollers 1 1 and / or 12 may be slidably mounted to make room for the guide roller 14. The guide roller 14 may for this purpose comprise a sufficiently small diameter.
Die Figur 2 zeigt einen vergrößerten Ausschnitt aus der Figur 1 . Zu erkennen ist, dass die Umlenkwalze 14 nicht aktiv ist. Die Drehrichtungen der Walzen 1 1 und 12 sind durch die Pfeile 21 und 22 gekennzeichnet. FIG. 2 shows an enlarged detail from FIG. 1. It can be seen that the deflection roller 14 is not active. The directions of rotation of the rollers 1 1 and 12 are indicated by the arrows 21 and 22.
Die Figur 3 zeigt nun die Umlenkwalze 14, nachdem sie in den Transportpfad der Folienbahn 2 eingebracht wurde. Gleichzeitig wurde die Drehrichtung der Transportwalze umgedreht und wird durch den Pfeil 22' gekennzeichnet. Der Umschlingungswinkel α, mit dem die Folienbahn 2 die Umlenkwalze 14 umschlingt, hat eine Größe von beispielsweise 40 Grad. Die Walze 13 kann in diesem Fall als Umlenkwalze verwendet werden. Die Figur 4 zeigt dieselbe Situation wie die Figur 3. Jedoch ist nun ein Ausführungsbeispiel für einen Verlagerungsmechanismus gezeigt, mit dem die Walze 14 relativ zu der Transportwalze 1 1 und/oder der Transportwalze 12 verlagerbar, in dem vorliegenden Fall verschwenkbar, ist. Dazu ist die Umlenkwalze 14 drehbar über ein Drehgelenk in einem Schwenkarm 23 gelagert. Der Schwenkarm 23 ist drehbar in einer gestellfesten Stütze 24 gelagert. An dem der Umlenkwalze 14 abgewandten Ende des Schwenkarms 23 ist die Kolbenstange 25 einer Kolbenzylindereinheit 26 drehbar gelagert. Der Kolben 27 der Kolbenzylindereinheit stützt sich drehbar auf einer weiteren gestellfesten Stütze 28 ab. FIG. 3 now shows the deflection roller 14 after it has been introduced into the transport path of the film web 2. At the same time, the direction of rotation of the transport roller was reversed and is indicated by the arrow 22 '. Of the Wrap angle α, with which the film web 2 wraps around the deflection roller 14, has a size of, for example, 40 degrees. The roller 13 can be used in this case as a deflection roller. FIG. 4 shows the same situation as FIG. 3. However, an embodiment of a displacement mechanism with which the roller 14 is displaceable, in the present case, displaceable relative to the transport roller 11 and / or the transport roller 12, is now shown. For this purpose, the guide roller 14 is rotatably mounted via a rotary joint in a pivot arm 23. The pivot arm 23 is rotatably mounted in a frame-fixed support 24. At the end of the pivoting arm 23 facing away from the deflecting roller 14, the piston rod 25 of a piston-cylinder unit 26 is rotatably mounted. The piston 27 of the piston-cylinder unit is rotatably supported on a further frame-fixed support 28.
Mit dem beschriebenen Ausführungsbeispiel kann die Folienbahn 2 über gewünschte Transportpfade durch den durch die Walzen 1 1 und 12 gebildeten Reckspalt geführt werden. In der Regel wird man in Abhängigkeit der Materialien, aus denen die Folie besteht, den Transportpfad wählen. So können für viele Materialkombinationen qualitativ hochwertige Folien hergestellt werden. With the described embodiment, the film web 2 can be guided over desired transport paths through the stretching gap formed by the rollers 11 and 12. As a rule, one will choose the transport path depending on the materials of which the film is made. Thus, high-quality films can be produced for many material combinations.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
Vorrichtung zum Längsrecken einer Folienbahn 2 Device for longitudinal stretching of a film web 2
Folienbahn sheet
Transportrichtung transport direction
Heizeinrichtung heater
Leitwalze guide roll
Heizwalze heating roller
Reckwerk stretching unit
Transportwalze transport roller
Transportwalze transport roller
Transportwalze transport roller
Transportwalze transport roller
Andrückwalze pressure roller
Umlenkwalze deflecting
Abkühleinrichtung cooling device
Abkühlwalze chill
Leitwalze guide roll
Leitwalze guide roll
Ablösekante removal edge
Drehrichtung der Walze 1 1 Direction of rotation of the roll 1 1
, 22' Drehrichtung der Walze 12 , 22 'direction of rotation of the roller 12
Schwenkarm swivel arm
Gestellfeste Stütze Frame-fixed support
Kolbenstange piston rod
Kolbenzylindereinheit Piston-cylinder unit
Kolben piston
Gestellfeste Stütze Frame-fixed support
Umschlingungswinkel der Folie um die Umlenkwalze 14 Wrap angle of the film around the guide roller 14th
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009046593.6 | 2009-11-10 | ||
| DE102009046593A DE102009046593A1 (en) | 2009-11-10 | 2009-11-10 | Apparatus and method for longitudinally stretching a film web |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011057929A1 true WO2011057929A1 (en) | 2011-05-19 |
Family
ID=43502516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2010/066716 Ceased WO2011057929A1 (en) | 2009-11-10 | 2010-11-03 | Device and method for longitudinally stretching a film web |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102009046593A1 (en) |
| WO (1) | WO2011057929A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011085735A1 (en) | 2011-11-03 | 2013-05-08 | Windmöller & Hölscher Kg | Stretching unit and method for length of film webs |
| WO2013101877A2 (en) | 2011-12-29 | 2013-07-04 | Iowa State University Research Foundation, Inc. | Genetically modified plants with resistance to xanthomonas and other bacterial plant pathogens |
| DE102012015462A1 (en) | 2012-08-07 | 2014-02-13 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Blown film plant, process for producing a blown film web and film produced therewith |
| DE102018008127B4 (en) | 2018-10-13 | 2022-06-09 | Hosokawa Alpine Aktiengesellschaft | Die head and process for producing a multi-layer tubular film |
| DE102018009632B4 (en) | 2018-12-11 | 2021-12-09 | Hosokawa Alpine Aktiengesellschaft | Apparatus for winding and changing laps of web material and a method therefor |
| DE102020000334A1 (en) | 2020-01-21 | 2021-07-22 | Hosokawa Alpine Aktiengesellschaft | Device and method for the uniaxial change in length of film webs |
| DE102022000351A1 (en) | 2022-01-29 | 2023-08-03 | Hosokawa Alpine Aktiengesellschaft | Process and device for controlling the film thickness of stretched tubular film produced in the film blowing process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61160222A (en) * | 1985-01-07 | 1986-07-19 | Mitsubishi Petrochem Co Ltd | Longitudinal stretching method for thermoplastic resin film |
| WO1999067080A1 (en) * | 1998-06-23 | 1999-12-29 | First Green Park Pty Ltd. | Orientation of films to improve barrier and uv stability |
| WO2006063641A1 (en) | 2004-12-16 | 2006-06-22 | Brückner Maschinenbau GmbH | Device and method for driving a preheating roll assembly in a calender unit |
| WO2009082105A2 (en) * | 2007-12-20 | 2009-07-02 | Bae, Hee Jung | Apparatus for lengthening the length for resin panels |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1212290B (en) * | 1963-10-15 | 1966-03-10 | Brueckner Trocknerbau | Device for stretching a stretchable material web |
| DE1901059B2 (en) * | 1969-01-10 | 1975-03-27 | Basf Ag, 6700 Ludwigshafen | Process and device for the production of biaxially oriented polyamide films |
-
2009
- 2009-11-10 DE DE102009046593A patent/DE102009046593A1/en not_active Withdrawn
-
2010
- 2010-11-03 WO PCT/EP2010/066716 patent/WO2011057929A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61160222A (en) * | 1985-01-07 | 1986-07-19 | Mitsubishi Petrochem Co Ltd | Longitudinal stretching method for thermoplastic resin film |
| WO1999067080A1 (en) * | 1998-06-23 | 1999-12-29 | First Green Park Pty Ltd. | Orientation of films to improve barrier and uv stability |
| WO2006063641A1 (en) | 2004-12-16 | 2006-06-22 | Brückner Maschinenbau GmbH | Device and method for driving a preheating roll assembly in a calender unit |
| WO2009082105A2 (en) * | 2007-12-20 | 2009-07-02 | Bae, Hee Jung | Apparatus for lengthening the length for resin panels |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009046593A1 (en) | 2011-05-12 |
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