EP1795345B1 - Device and method for applying colour and/or varnish on a substrate - Google Patents

Device and method for applying colour and/or varnish on a substrate Download PDF

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Publication number
EP1795345B1
EP1795345B1 EP05026970A EP05026970A EP1795345B1 EP 1795345 B1 EP1795345 B1 EP 1795345B1 EP 05026970 A EP05026970 A EP 05026970A EP 05026970 A EP05026970 A EP 05026970A EP 1795345 B1 EP1795345 B1 EP 1795345B1
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EP
European Patent Office
Prior art keywords
substrate
film
cylinder
heating cylinder
contact
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EP05026970A
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German (de)
French (fr)
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EP1795345A1 (en
Inventor
Max Zaher
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DeMaxZ AG
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DeMaxZ AG
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Priority to EP05026970A priority Critical patent/EP1795345B1/en
Priority to DE502005005715T priority patent/DE502005005715D1/en
Priority to AT05026970T priority patent/ATE411168T1/en
Publication of EP1795345A1 publication Critical patent/EP1795345A1/en
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Publication of EP1795345B1 publication Critical patent/EP1795345B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F16/00—Transfer printing apparatus

Definitions

  • the invention relates to an apparatus and a method for transferring paint and / or paint from a film to a substrate.
  • the said film should in particular be a so-called release film, i. a film on which a decor of paint and / or varnish is applied and of which this decor is transferable in a simple manner in the manner of a "Abpellens" on a substrate.
  • the substrate may in particular be a plastic film, in particular a polyolefin film such as a film of PVC.
  • the substrate may be e.g. to be a textile material.
  • document DE-A-2 552 439 discloses a device for transferring paint and / or paint according to the preamble of claim 1 and a corresponding method.
  • the invention has the object to provide a device and a method of the type mentioned, with which a decor of paint and / or lacquer with high accuracy and high speed and in good image quality and stability is transferable to a substrate.
  • the invention teaches a device for transferring paint and / or paint from a film to a substrate by means of a heating cylinder and a cooling cylinder, between which the film and the substrate come into transfer contact, with a control cylinder, which is movable with respect to the heating cylinder is that the contact point between the film and the heating cylinder is changeable.
  • the invention also teaches a method for transferring paint and / or varnish from a film to a substrate by means of a heating cylinder and a cooling cylinder, between which the film and the substrate are brought into transfer contact, wherein the contact length between the film and the heating cylinder and the feed rate of the film can be changed in dependence on each other.
  • the invention thus teaches to control the contact length between the release film and the heating cylinder depending on, in particular, the feed rate of the film, i. the speed of transmission.
  • the feed rate of the film i. the speed of transmission.
  • other parameters for the optimal adjustment of the mentioned contact length can be important, such as the thickness and the material of the substrate, the type and thickness of the film, the type of decoration to be transferred from paint and / or lacquer etc.
  • the contact length between the release film and the heating cylinder is controlled so that the transfer temperature is approximately in the range of 180 ° C to 220 ° C.
  • the substrate is cooled by means of the cooling cylinder to temperatures e.g. less than 60 ° C, in particular room temperature cooled.
  • the optimum temperature difference between the heating cylinder and the cooling cylinder is between 120 ° C and 140 ° C.
  • the contact length between the release film and the heating cylinder is optimized in each case depending on the film used and the substrate and the decoration to be transferred.
  • materials for release films are known in particular siliconized paper, polypropylene, etc.
  • the temperature of the substrate was kept at room temperature with the cooling cylinder and the temperature of the color decoration when transferred in the range of 180 ° C to 220 ° C, depending on the thickness of the substrate.
  • a feed rate of 10 m / min could be achieved.
  • the temperature of the PVC substrate does not exceed the maximum permissible value of 60 ° C at which critical volume changes and also delamination can occur.
  • a preferred embodiment of the invention provides two or more secondary cooling cylinder, which roll on the surface of the cooling cylinder and thereby cool it very effectively.
  • the cooling cylinder is thus not cooled from the inside in this embodiment of the invention, but directly on its surface.
  • the two or more secondary cooling cylinders are cooled directly below their surface by a circulating cooling medium. This arrangement allows a very fast (slow-acting) setting of the desired temperatures.
  • the invention also teaches an effective and in particular lossless starting of a transfer process, ie the start of a device which is particularly critical in the prior art and is associated with high material losses.
  • the starting operation is such that the feed rate of release film and substrate is slowly increased (both films are guided substantially synchronously, ie at the same speed through the cylinder) and thereby the contact length is increased proportionally with increasing speed.
  • the figure shows schematically a device for transferring a decoration of paint and / or paint from a release film to a substrate.
  • the apparatus has an unwind roll 10, from which a substrate 18 to be printed is conveyed onto a rewinding roll 12 for printed substrate.
  • the device has unwinding rollers 14a, 14b for release film 34.
  • take-up rollers 16a, 16b are available for the film (34 ') freed of the decoration in a manner to be described.
  • a substrate 18 As a substrate 18 is used in the embodiment, a PVC film. First, the path of the substrate 18 or 18 'will be described.
  • the unprinted substrate 18 is unwound from the unwinding roll 10, which thereby rotates clockwise, and passes via deflection rollers 20, 22 to a known as such cooling cylinder 24.
  • the cooling cylinder 24 also rotates clockwise. In this case, the substrate 18 enters the contact region 52 between the cooling cylinder 24 and a heating cylinder 26.
  • the cooling cylinder 24 has a rubber-like soft surface. In the contact area between the cylinders, the release transition of the decoration takes place from the release film 34 to the substrate 18, so that the substrate 18 'decorated with paint and / or lacquer leaves the cooling cylinder 24. It passes over deflection rollers 28, 30, 32 on the take-up reel 12 for the printed substrate 18 '.
  • the path of the release film 34 is as follows: There are optionally two unwinding rollers 14a, 14b for the release film 34 printed in a manner known per se with the decor. From one of the unwinding rollers 14a or 14b, the printed release film 34 passes over deflection rollers 38, 40 on the heating cylinder 26, which opposes turns clockwise. This also causes the release film 34 in the transfer region 52 between the cylinders 24, 26. Before the release film 34 reaches the heating cylinder 26, it passes over a control cylinder 50.
  • the control cylinder 50 is movable in the drawing plane in the figure, ie in the coordinate system x, y.
  • the contact point K at which the release film 34 comes into contact with the heating cylinder 26, can be set optionally.
  • the contact point K between release film 34 and the surface of the heating cylinder 26 determines the heating of the release film 34.
  • a typical heating temperature of the heating cylinder 26 is in the range of 180 ° C to 220 ° C, depending on the materials used, film and Substrate thicknesses, etc.
  • the contact length is the distance between the contact point K and the center of the contact region 52 between the cylinders 24, 26. The center of this contact region 52 lies on the connecting line (not shown) of the central axes of the two circular cylinders 24, 26. It can be seen in that the release film is heated more strongly with increasing contact length.
  • the release film When using polypropylene for the release film and PVC for the substrate film, the release film is heated to, for example 180 ° C and the substrate film is cooled to room temperature (in any case, to a temperature below 60 ° C).
  • the above feed speeds can be achieved, for example, a feed rate of 45 m / min at a contact length of 10 cm. Stretching or shrinking of the PVC film does not occur and there is no delamination of the transferred decoration from the substrate.
  • the printed substrate 18 'leaves the transfer area 52 between the cylinders 24, 26 at an acute angle to the common tangent of the cylinders.
  • the two cylinders 24, 26 are driven.
  • the release film 34 'and the printed substrate 18' run together via deflection rollers 28, 30 to a separating edge 42, at which the release of the decor release film 34 'from the printed substrate 18' separates.
  • the cooling cylinder 24 is with its axis of rotation via a slotted guide (not shown in detail) so displaceable that it is movable relative to the heating cylinder 26 in order to adjust the pressing force of the cylinder selectively.
  • a temperature sensor (not shown in more detail) can be provided which measures the temperatures in the transfer area between the cylinders 24, 26.
  • two temperature sensors are provided, one of which measures the heating temperature at the release film 34 and the other the cooling temperature at the cooling cylinder 24.
  • a sensor may be provided to measure the exact relative position between the control cylinder 50 and the heating cylinder 26 and to input this measurement result into the computer controlling the equipment.
  • a laser distance measuring device is particularly suitable. This allows the exact coordinates x, y to be measured and the resulting contact point K to be determined. It is also possible to measure the contact point K between release film 34 and heating cylinder 26 directly with a measuring device. As stated above, this contact point is a fundamental parameter for the control of the system, in particular the feed rate at which the film and the substrate are advanced between the cylinders 24, 26. While the cooling cylinder 24 has a soft rubber surface, the heating cylinder 26 has a hard metallic surface.
  • the two secondary cooling cylinders 54, 56 cool the cooling cylinder 24.
  • a cooling medium circulates (for example, water) through the two secondary cooling cylinders 54, 56.
  • the cooling medium passes through a so-called "chiller", which cools it to a desired temperature.
  • the operating conditions may be adjusted so that the two secondary cooling cylinders 54, 56 are the cooling cylinder 24 to room temperature, so for example 20 ° C, constant temperature.
  • the two secondary cooling cylinders 54, 56 are tempered by the cooling medium directly below their surface, which is in contact with the cooling cylinder 24.
  • Suitable substrates are, in particular, the abovementioned polyolefin films, in particular PVC and also textile materials.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Decoration By Transfer Pictures (AREA)
  • Laminated Bodies (AREA)

Abstract

The device has a heating cylinder (26) and a cooling cylinder (24) between which, a release foil (34) and a substrate (18) comes in transmission contact. A control cylinder (50) is provided, which is moved with respect to the heating cylinder, so that the contact position (K) is changeable between the release foil and the heating cylinder. An independent claim is also included for a method for transferring color or varnish by a release foil on a substrate by a heating cylinder and a cooling cylinder between which, the release foil and the substrate comes in transmission contact.

Description

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Übertragen von Farbe und/oder Lack von einer Folie auf ein Substrat.The invention relates to an apparatus and a method for transferring paint and / or paint from a film to a substrate.

Dabei soll es sich bei der genannten Folie insbesondere um eine sogenannte Release-Folie handeln, d.h. eine Folie, auf der ein Dekor aus Farbe und/oder Lack aufgetragen ist und von der dieses Dekor in einfacher Weise in der Art eines "Abpellens" auf ein Substrat übertragbar ist. Bei dem Substrat kann es sich insbesondere um eine Kunststofffolie, insbesondere eine Polyolefin-Folie wie eine Folie aus PVC handeln. Auch kann das Substrat z.B. ein Textilmaterial sein.The said film should in particular be a so-called release film, i. a film on which a decor of paint and / or varnish is applied and of which this decor is transferable in a simple manner in the manner of a "Abpellens" on a substrate. The substrate may in particular be a plastic film, in particular a polyolefin film such as a film of PVC. Also, the substrate may be e.g. to be a textile material.

Dokument DE-A-2 552 439 offenbart eine Vorrichtung zum Übertragen von Farbe und/oder Lack gemäß dem Oberbegriff des Anspruchs 1 und ein entsprechendes Verfahren.document DE-A-2 552 439 discloses a device for transferring paint and / or paint according to the preamble of claim 1 and a corresponding method.

Für die Anwendung der genannten Release-Technik zum Dekorieren von Substraten und Gegenständen gibt es vielfältigen Stand der Technik.For the application of the mentioned release technique for decorating substrates and articles, there are various state of the art.

Die Erfindung setzt sich das Ziel, eine Vorrichtung und ein Verfahren der eingangs genannten Art bereitzustellen, mit denen ein Dekor aus Farbe und/oder Lack mit hoher Genauigkeit und hoher Geschwindigkeit sowie in guter Abbildungsqualität und Stabilität auf ein Substrat übertragbar ist.The invention has the object to provide a device and a method of the type mentioned, with which a decor of paint and / or lacquer with high accuracy and high speed and in good image quality and stability is transferable to a substrate.

Hierzu lehrt die Erfindung eine Vorrichtung zum Übertragen von Farbe und/oder Lack von einer Folie auf ein Substrat mittels eines Heizzylinders und eines Kühlzylinders, zwischen denen die Folie und das Substrat in Übertragungskontakt kommen, mit einem Steuerzylinder, der so in Bezug auf den Heizzylinder bewegbar ist, dass die Kontaktstelle zwischen der Folie und dem Heizzylinder veränderbar ist.For this purpose, the invention teaches a device for transferring paint and / or paint from a film to a substrate by means of a heating cylinder and a cooling cylinder, between which the film and the substrate come into transfer contact, with a control cylinder, which is movable with respect to the heating cylinder is that the contact point between the film and the heating cylinder is changeable.

Entsprechend lehrt die Erfindung auch ein Verfahren zum Übertragen von Farbe und/oder Lack von einer Folie auf ein Substrat mittels eines Heizzylinders und eines Kühlzylinders, zwischen denen die Folie und das Substrat in Übertragungskontakt gebracht werden, wobei die Kontaktlänge zwischen der Folie und dem Heizzylinder und die Vorschubgeschwindigkeit der Folie in Abhängigkeit voneinander verändert werden.Accordingly, the invention also teaches a method for transferring paint and / or varnish from a film to a substrate by means of a heating cylinder and a cooling cylinder, between which the film and the substrate are brought into transfer contact, wherein the contact length between the film and the heating cylinder and the feed rate of the film can be changed in dependence on each other.

Die Erfindung lehrt somit eine Steuerung der Kontaktlänge zwischen der Release-Folie und dem Heizzylinder in Abhängigkeit von insbesondere der Vorschubgeschwindigkeit der Folie, d.h. der Geschwindigkeit des Übertragens. Neben der Vorschubgeschwindigkeit können auch andere Parameter für die optimale Einstellung der genannten Kontaktlänge bedeutsam sein, wie zum Beispiel die Stärke und das Material des Substrates, die Art und Stärke der Folie, die Art des zu übertragenden Dekors aus Farbe und/oder Lack etc.The invention thus teaches to control the contact length between the release film and the heating cylinder depending on, in particular, the feed rate of the film, i. the speed of transmission. In addition to the feed rate, other parameters for the optimal adjustment of the mentioned contact length can be important, such as the thickness and the material of the substrate, the type and thickness of the film, the type of decoration to be transferred from paint and / or lacquer etc.

Mit den erfindungsgemäßen Maßnahmen ist es möglich, die Übertragung des Dekors mit sehr hoher Geschwindigkeit und in guter Qualität zu erreichen. Die Kontaktlänge zwischen der Release-Folie und dem Heizzylinder wird so gesteuert, dass die Übertragungstemperatur etwa im Bereich von 180°C bis 220°C liegt. Gleichzeitig wird das Substrat mittels des Kühlzylinders auf Temperaturen z.B. geringer als 60°C, insbesondere Raumtemperatur gekühlt. Die optimale Temperaturdifferenz zwischen Heizzylinder und Kühlzylinder liegt bei 120°C bis 140°C. Mit diesen Parametern wird ein Schrumpfen oder Dehnen des Substrates verhindert. Dies stellt sicher, dass nach Übertragung des Dekors auf das Substrat eine sogenannte Delamination des übertragenen Dekors vom Substrat weitestgehend verhindert ist. Als Substrat eignet sich typischerweise ein PVC-Film. Mit der Erfindung ist es möglich, eine Volumenänderung, also ein Schrumpfen oder Dehnen, des PVC-Films zu verhindern, sodass das übertragene Dekor fest auf dem Substrat verbleibt.With the measures according to the invention, it is possible to achieve the transfer of the decoration with very high speed and in good quality. The contact length between the release film and the heating cylinder is controlled so that the transfer temperature is approximately in the range of 180 ° C to 220 ° C. At the same time, the substrate is cooled by means of the cooling cylinder to temperatures e.g. less than 60 ° C, in particular room temperature cooled. The optimum temperature difference between the heating cylinder and the cooling cylinder is between 120 ° C and 140 ° C. With these parameters, a shrinkage or stretching of the substrate is prevented. This ensures that after transfer of the decoration to the substrate, so-called delamination of the transferred decoration from the substrate is largely prevented. The substrate is typically a PVC film. With the invention, it is possible to prevent a volume change, ie shrinking or stretching, of the PVC film, so that the transferred decoration remains firmly on the substrate.

Die Kontaktlänge zwischen der Release-Folie und dem Heizzylinder wird in Abhängigkeit von der verwendeten Folie und dem Substrat sowie dem zu übertragenen Dekor jeweils im Einzelfall optimiert. Als Materialien für Release-Folien sind insbesondere bekannt silikonisiertes Papier, Polypropylen etc.The contact length between the release film and the heating cylinder is optimized in each case depending on the film used and the substrate and the decoration to be transferred. As materials for release films are known in particular siliconized paper, polypropylene, etc.

Für eine gegebene Anordnung einer Release-Folie aus Polypropylen und einem Substrat aus PVC wurde mit dem Kühlzylinder die Temperatur des Substrates auf Raumtemperatur gehalten und die Temperatur des Farbdekors beim Übertragen im Bereich von 180°C bis 220°C, je nach Stärke des Substrates. Damit konnte bei einer Kontaktlänge von 1 cm zwischen der Release-Folie und dem Heizzylinder eine Vorschubgeschwindigkeit von 10 m/min erreicht werden. Bei einer Kontaktlänge von 2 cm eine Vorschubgeschwindigkeit von 15 m/min, bei einer Kontaktlänge von 4 cm eine Vorschubgeschwindigkeit von 20 m/min, bei einer Kontaktlänge von 6 cm eine Vorschubgeschwindigkeit von 25 m/min, bei einer Kontaktlänge von 8 cm, eine Vorschubgeschwindigkeit von 35 m/min und bei einer Kontaktlänge von 10 cm eine Vorschubgeschwindigkeit von 45 m/min, also eine extrem hohe Übertragungsgeschwindigkeit. Dabei übersteigt die Temperatur des PVC-Substrates nicht den maximal zulässigen Wert von 60°C, bei dem kritische Volumenänderungen und auch Delaminationen auftreten können.For a given arrangement of a release film of polypropylene and a substrate of PVC, the temperature of the substrate was kept at room temperature with the cooling cylinder and the temperature of the color decoration when transferred in the range of 180 ° C to 220 ° C, depending on the thickness of the substrate. Thus, with a contact length of 1 cm between the release film and the heating cylinder, a feed rate of 10 m / min could be achieved. At a contact length of 2 cm, a feed rate of 15 m / min, with a contact length of 4 cm, a feed rate of 20 m / min, with a contact length of 6 cm, a feed rate of 25 m / min, with a contact length of 8 cm, a Feed rate of 35 m / min and with a contact length of 10 cm, a feed rate of 45 m / min, so an extremely high transmission speed. The temperature of the PVC substrate does not exceed the maximum permissible value of 60 ° C at which critical volume changes and also delamination can occur.

Eine bevorzugte Ausgestaltung der Erfindung sieht zwei oder mehr sekundäre Kühlzylinder vor, die auf der Oberfläche des Kühlzylinders abrollen und diesen dabei sehr effektiv kühlen. Der Kühlzylinder wird bei dieser Ausführung der Erfindung also nicht von innen gekühlt, sondern direkt auf seiner Oberfläche. Die zwei oder mehr sekundären Kühlzylinder werden direkt unter ihrer Oberfläche durch ein zirkulierendes Kühlmedium gekühlt. Diese Anordnung ermöglicht eine sehr schnelle (wenig träge) Einstellung der gewünschten Temperaturen.A preferred embodiment of the invention provides two or more secondary cooling cylinder, which roll on the surface of the cooling cylinder and thereby cool it very effectively. The cooling cylinder is thus not cooled from the inside in this embodiment of the invention, but directly on its surface. The two or more secondary cooling cylinders are cooled directly below their surface by a circulating cooling medium. This arrangement allows a very fast (slow-acting) setting of the desired temperatures.

Die Erfindung lehrt auch ein effektives und insbesondere verlustfreies Anfahren eines Übertragungsvorganges, also den Start einer Vorrichtung, der beim Stand der Technik besonders kritisch ist und mit hohen Materialverlusten einhergeht. Gemäß der Erfindung erfolgt der Anfahrvorgang derart, dass langsam die Vorschubgeschwindigkeit von Release-Folie und Substrat erhöht wird (beide Folien werden im wesentlichen synchron, also mit gleicher Geschwindigkeit durch die Zylinder geführt) und dabei wird die Kontaktlänge mit zunehmender Geschwindigkeit proportional gesteigert.The invention also teaches an effective and in particular lossless starting of a transfer process, ie the start of a device which is particularly critical in the prior art and is associated with high material losses. According to the invention, the starting operation is such that the feed rate of release film and substrate is slowly increased (both films are guided substantially synchronously, ie at the same speed through the cylinder) and thereby the contact length is increased proportionally with increasing speed.

Nachfolgend wird die Erfindung anhand der Figur näher beschrieben.The invention will be described in more detail with reference to FIG.

Die Figur zeigt schematisch eine Vorrichtung zum Übertragen eines Dekors aus Farbe und/oder Lack von einer Release-Folie auf ein Substrat.The figure shows schematically a device for transferring a decoration of paint and / or paint from a release film to a substrate.

Die Vorrichtung weist eine Abwickelrolle 10 auf, von der ein zu bedruckendes Substrat 18 auf eine Aufwickelrolle 12 für bedrucktes Substrat gefördert wird.The apparatus has an unwind roll 10, from which a substrate 18 to be printed is conveyed onto a rewinding roll 12 for printed substrate.

Des weiteren weist die Vorrichtung Abwickelrollen 14a, 14b für Release-Folie 34 auf. Für die von dem Dekor in noch zu beschreibender Weise befreite Folie (34') stehen Aufwickelrollen 16a, 16b zur Verfügung.Furthermore, the device has unwinding rollers 14a, 14b for release film 34. For the film (34 ') freed of the decoration in a manner to be described, take-up rollers 16a, 16b are available.

Als Substrat 18 dient beim Ausführungsbeispiel ein PVC-Film. Zunächst soll der Weg des Substrates 18 bzw. 18' beschrieben werden.As a substrate 18 is used in the embodiment, a PVC film. First, the path of the substrate 18 or 18 'will be described.

Das unbedruckte Substrat 18 wird von der Abwickelrolle 10, die sich dabei im Uhrzeigersinn dreht, abgewickelt und gelangt über Umlenkrollen 20, 22 auf einen als solches bekannten Kühlzylinder 24. Der Kühlzylinder 24 dreht sich ebenfalls im Uhrzeigersinn. Dabei gelangt das Substrat 18 in den Kontaktbereich 52 zwischen dem Kühlzylinder 24 und einem Heizzylinder 26. Der Kühlzylinder 24 hat eine gummiartig weiche Oberfläche. Im Kontaktbereich zwischen den Zylindern erfolgt der Release-Übergang des Dekors von der Release-Folie 34 auf das Substrat 18, sodass das mit Farbe und/oder Lack dekorierte Substrat 18' den Kühlzylinder 24 verlässt. Es gelangt über Umlenkrollen 28, 30, 32 auf die Aufwickelrolle 12 für das bedruckte Substrat 18'.The unprinted substrate 18 is unwound from the unwinding roll 10, which thereby rotates clockwise, and passes via deflection rollers 20, 22 to a known as such cooling cylinder 24. The cooling cylinder 24 also rotates clockwise. In this case, the substrate 18 enters the contact region 52 between the cooling cylinder 24 and a heating cylinder 26. The cooling cylinder 24 has a rubber-like soft surface. In the contact area between the cylinders, the release transition of the decoration takes place from the release film 34 to the substrate 18, so that the substrate 18 'decorated with paint and / or lacquer leaves the cooling cylinder 24. It passes over deflection rollers 28, 30, 32 on the take-up reel 12 for the printed substrate 18 '.

Der Weg der Release-Folie 34 ist wie folgt: Es stehen wahlweise zwei Abwickelrollen 14a, 14b für die mit dem Dekor in an sich bekannter Weise bedruckte Release-Folie 34 zur Verfügung. Von einer der Abwickelrollen 14a oder 14b gelangt die bedruckte Release-Folie 34 über Umlenkrollen 38, 40 auf den Heizzylinder 26, der sich gegen den Uhrzeigersinn dreht. Dadurch kommt auch die Release-Folie 34 in den Übertragungsbereich 52 zwischen den Zylindern 24, 26. Bevor die Release-Folie 34 zum Heizzylinder 26 gelangt, läuft sie über einen Steuerzylinder 50. Der Steuerzylinder 50 ist in der Figur in der Zeichnungsebene bewegbar, d.h. in dem Koordinatensystem x, y. Somit lässt sich durch Bewegung des Steuerzylinders 50 die Kontaktstelle K, an der die Release-Folie 34 mit dem Heizzylinder 26 in Kontakt kommt, wahlweise einstellen. Die Kontaktstelle K zwischen Release-Folie 34 und der Oberfläche des Heizzylinders 26 bestimmt die Aufheizung der Release-Folie 34. Eine typische Heiztemperatur des Heizzylinders 26 liegt im Bereich von 180°C bis 220°C, je nach den verwendeten Materialien, Film- und Substratstärken etc. Die Kontaktlänge ist die Strecke zwischen der Kontaktstelle K und der Mitte des Kontaktbereiches 52 zwischen den Zylindern 24, 26. Die Mitte dieses Kontaktbereiches 52 liegt auf der Verbindungslinie (nicht gezeigt) der Mittelachsen der beiden Kreiszylinder 24, 26. Es ist ersichtlich, dass mit zunehmender Kontaktlänge die Release-Folie stärker aufgeheizt wird.The path of the release film 34 is as follows: There are optionally two unwinding rollers 14a, 14b for the release film 34 printed in a manner known per se with the decor. From one of the unwinding rollers 14a or 14b, the printed release film 34 passes over deflection rollers 38, 40 on the heating cylinder 26, which opposes turns clockwise. This also causes the release film 34 in the transfer region 52 between the cylinders 24, 26. Before the release film 34 reaches the heating cylinder 26, it passes over a control cylinder 50. The control cylinder 50 is movable in the drawing plane in the figure, ie in the coordinate system x, y. Thus, by moving the control cylinder 50, the contact point K, at which the release film 34 comes into contact with the heating cylinder 26, can be set optionally. The contact point K between release film 34 and the surface of the heating cylinder 26 determines the heating of the release film 34. A typical heating temperature of the heating cylinder 26 is in the range of 180 ° C to 220 ° C, depending on the materials used, film and Substrate thicknesses, etc. The contact length is the distance between the contact point K and the center of the contact region 52 between the cylinders 24, 26. The center of this contact region 52 lies on the connecting line (not shown) of the central axes of the two circular cylinders 24, 26. It can be seen in that the release film is heated more strongly with increasing contact length.

Bei Verwendung von Polypropylen für die Release-Folie und PVC für die Substrat-Folie wird die Release-Folie auf zum Beispiel 180°C geheizt und die Substrat-Folie wird auf Zimmertemperatur gekühlt (jedenfalls auf eine Temperatur unterhalb von 60°C). Damit können die oben genannten Vorschubgeschwindigkeiten erreicht werden, zum Beispiele eine Vorschubgeschwindigkeit von 45 m/min bei einer Kontaktlänge von 10 cm. Ein Dehnen oder Schrumpfen der PVC-Folie tritt nicht auf und es ist keine Delamination des übertragenen Dekors vom Substrat zu verzeichnen.When using polypropylene for the release film and PVC for the substrate film, the release film is heated to, for example 180 ° C and the substrate film is cooled to room temperature (in any case, to a temperature below 60 ° C). Thus, the above feed speeds can be achieved, for example, a feed rate of 45 m / min at a contact length of 10 cm. Stretching or shrinking of the PVC film does not occur and there is no delamination of the transferred decoration from the substrate.

Wie die Figur zeigt, verlässt das bedruckte Substrat 18' den Übertragungsbereich 52 zwischen den Zylindern 24, 26 unter einem spitzen Winkel zur gemeinsamen Tangente der Zylinder. Die beiden Zylinder 24, 26 sind angetrieben.As the figure shows, the printed substrate 18 'leaves the transfer area 52 between the cylinders 24, 26 at an acute angle to the common tangent of the cylinders. The two cylinders 24, 26 are driven.

Danach laufen die Release-Folie 34' und das bedruckte Substrat 18' gemeinsam über Umlenkrollen 28, 30 zu einer Trennkante 42, an der sich die vom Dekor befreite Release-Folie 34' vom bedruckten Substrat 18' trennt. Die Rest-Folie 34' gelangt über Umlenkrollen 44, 46 auf eine der beiden Aufwickelrollen 16a, 16b für die vom Dekor befreite Release-Folie 34'.Thereafter, the release film 34 'and the printed substrate 18' run together via deflection rollers 28, 30 to a separating edge 42, at which the release of the decor release film 34 'from the printed substrate 18' separates. The remaining film 34 'passes over Deflection rollers 44, 46 on one of the two take-up rollers 16a, 16b for the release of the release film 34 '.

Der Kühlzylinder 24 ist mit seiner Drehachse über eine Kulissenführung (nicht näher dargestellt) derart verschiebbar, dass er relativ zum Heizzylinder 26 bewegbar ist, um die Andrückkraft der Zylinder wahlweise einstellen zu können.The cooling cylinder 24 is with its axis of rotation via a slotted guide (not shown in detail) so displaceable that it is movable relative to the heating cylinder 26 in order to adjust the pressing force of the cylinder selectively.

Es kann weiterhin ein Temperatursensor (nicht näher dargestellt) vorgesehen sein, der die Temperaturen im Übertragungsbereich zwischen den Zylindern 24, 26 misst. Bevorzugt sind zwei Temperatursensoren vorgesehen, von denen einer die Heiztemperatur an der Release-Folie 34 und der andere die Kühltemperatur am Kühlzylinder 24 misst.Furthermore, a temperature sensor (not shown in more detail) can be provided which measures the temperatures in the transfer area between the cylinders 24, 26. Preferably, two temperature sensors are provided, one of which measures the heating temperature at the release film 34 and the other the cooling temperature at the cooling cylinder 24.

Weiterhin kann ein Sensor (nicht gezeigt) vorgesehen sein, um die genaue Relativposition zwischen dem Steuerzylinder 50 und dem Heizzylinder 26 zu messen und dieses Messergebnis in den die Anlagen steuernden Rechner einzugeben. Besonders geeignet ist zum Beispiel ein Laser-Abstandsmessgerät. Damit können die genauen Koordinaten x, y gemessen und sich die daraus ergebene Kontaktstelle K ermittelt werden. Es ist auch möglich, mit einem Messgerät direkt die Kontaktstelle K zwischen Release-Folie 34 und Heizzylinder 26 zu messen. Wie oben ausgeführt ist, ist diese Kontaktstelle ein grundlegender Parameter für die Steuerung der Anlage insbesondere der Vorschubgeschwindigkeit, mit der die Folie und das Substrat zwischen den Zylindern 24, 26 vorgeschoben werden. Während der Kühlzylinder 24 eine weiche Gummioberfläche aufweist, hat der Heizzylinder 26 eine harte metallische Oberfläche.Furthermore, a sensor (not shown) may be provided to measure the exact relative position between the control cylinder 50 and the heating cylinder 26 and to input this measurement result into the computer controlling the equipment. For example, a laser distance measuring device is particularly suitable. This allows the exact coordinates x, y to be measured and the resulting contact point K to be determined. It is also possible to measure the contact point K between release film 34 and heating cylinder 26 directly with a measuring device. As stated above, this contact point is a fundamental parameter for the control of the system, in particular the feed rate at which the film and the substrate are advanced between the cylinders 24, 26. While the cooling cylinder 24 has a soft rubber surface, the heating cylinder 26 has a hard metallic surface.

Die beiden sekundären Kühlzylinder 54, 56 kühlen den Kühlzylinder 24. Hierzu zirkuliert ein Kühlmedium (zum Beispiel Wasser) durch die beiden sekundären Kühlzylinder 54, 56. Das Kühlmedium durchläuft dabei einen sogenannten "Chiller", der es auf eine gewünschte Temperatur abkühlt. Zum Beispiel können die Betriebsbedingungen so eingestellt werden, dass die beiden sekundären Kühlzylinder 54, 56 den Kühlzylinder 24 auf Raumtemperatur, also zum Beispiel 20°C, konstant temperieren. Die beiden sekundären Kühlzylinder 54, 56 werden direkt unter ihrer Oberfläche, die mit dem Kühlzylinder 24 in Kontakt steht, durch das Kühlmedium temperiert.The two secondary cooling cylinders 54, 56 cool the cooling cylinder 24. For this purpose, a cooling medium circulates (for example, water) through the two secondary cooling cylinders 54, 56. The cooling medium passes through a so-called "chiller", which cools it to a desired temperature. For example, the operating conditions may be adjusted so that the two secondary cooling cylinders 54, 56 are the cooling cylinder 24 to room temperature, so for example 20 ° C, constant temperature. The two secondary cooling cylinders 54, 56 are tempered by the cooling medium directly below their surface, which is in contact with the cooling cylinder 24.

Als Substrat eignen sich insbesondere die genannten Polyolefin-Folien, insbesondere PVC und auch Textilstoffe.Suitable substrates are, in particular, the abovementioned polyolefin films, in particular PVC and also textile materials.

Claims (8)

  1. Device for transferring dye and/or lacquer from a film (34) onto a substrate by means of a heating cylinder (26) and a cooling cylinder (24) between which the film (34) and the substrate (18) get into transfer contact, characterized by a control cylinder (50) that is movable in relation to the heating cylinder (26) in such a manner that the point (K) of contact between the film (34) and the heating cylinder (26) is variable.
  2. Device according to claim 1 having one or several secondary cooling cylinders (54, 56) that cool the surface of the cooling cylinder (24).
  3. Device according to claim 2 having two or more secondary cooling cylinders (54, 56).
  4. Device according to one of the preceding claims, characterized in that the control cylinder (50) is designed such that it adjusts a contact length between the film (34) and the heating cylinder (26) larger than 1 cm, in particular larger than 2 cm, or 3 cm, or 4 cm, or 5 cm, or 6 cm, or 8 cm or 10 cm by varying the point of contact (K) between the film (34) and the heating cylinder (26).
  5. Method of transferring dye and/or lacquer from a film (34) to a substrate (18) by means of a heating cylinder (26) and a cooling cylinder (24) between which the film (34) and the substrate (18) get into transfer contact, the contact length between the film (34) and the heating cylinder (26) and the feeding speed of the film (34) being varied in dependence upon each other.
  6. Method according to claim 5, characterized in that a contact length greater than 1 cm, in particular greater than 2 cm, or 3 cm, or 4 cm, or 5 cm, or 6 cm, or 8 cm or 10 cm is adjusted.
  7. Method according to one of claims 5 or 6, characterized in that a temperature difference (ΔT) in the range of from 120 to 140°C is adjusted between the temperature of the heating cylinder (26) and the temperature of the cooling cylinder (24).
  8. Method according to one of claims 5, 6 or 7 in which when starting a transfer operation the contact length is enlarged with increasing advance speed.
EP05026970A 2005-12-09 2005-12-09 Device and method for applying colour and/or varnish on a substrate Not-in-force EP1795345B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05026970A EP1795345B1 (en) 2005-12-09 2005-12-09 Device and method for applying colour and/or varnish on a substrate
DE502005005715T DE502005005715D1 (en) 2005-12-09 2005-12-09 Apparatus and method for transferring paint and / or paint to a substrate
AT05026970T ATE411168T1 (en) 2005-12-09 2005-12-09 DEVICE AND METHOD FOR TRANSFERRING PAINT AND/OR PAINT TO A SUBSTRATE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05026970A EP1795345B1 (en) 2005-12-09 2005-12-09 Device and method for applying colour and/or varnish on a substrate

Publications (2)

Publication Number Publication Date
EP1795345A1 EP1795345A1 (en) 2007-06-13
EP1795345B1 true EP1795345B1 (en) 2008-10-15

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EP05026970A Not-in-force EP1795345B1 (en) 2005-12-09 2005-12-09 Device and method for applying colour and/or varnish on a substrate

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AT (1) ATE411168T1 (en)
DE (1) DE502005005715D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2666645A1 (en) 2012-05-25 2013-11-27 Veka AG Multi-layer for applying a metal coating or decorative coating to a workpiece and method for producing a film
EP2674298A1 (en) 2012-06-12 2013-12-18 Veka AG Roller for heating a decorative holder or a film

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2213559A1 (en) * 1972-03-21 1973-09-27 Guenther Skorzinski Heat transfer printing - heat resistant pressure belt on rollers to press paper, fabric against transfer drum
US4202663A (en) * 1972-09-25 1980-05-13 Haigh John M Method of dye absorption into the surface of plastic
DE2552439A1 (en) * 1975-11-22 1977-05-26 Monforts Fa A Transfer dye printing process - uses controlled vacuum pressure to allow use of temperatures below softening point of synthetic fibres in fabric
WO1981003462A1 (en) * 1980-06-03 1981-12-10 Laube R Method and device for colouring band like objects and objects obtained thereby

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ATE411168T1 (en) 2008-10-15
DE502005005715D1 (en) 2008-11-27
EP1795345A1 (en) 2007-06-13

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