EP1782951B1 - Mandrel for digital printing - Google Patents

Mandrel for digital printing Download PDF

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Publication number
EP1782951B1
EP1782951B1 EP05110323A EP05110323A EP1782951B1 EP 1782951 B1 EP1782951 B1 EP 1782951B1 EP 05110323 A EP05110323 A EP 05110323A EP 05110323 A EP05110323 A EP 05110323A EP 1782951 B1 EP1782951 B1 EP 1782951B1
Authority
EP
European Patent Office
Prior art keywords
tightening
hollow body
mandrel
shaft
control part
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.)
Active
Application number
EP05110323A
Other languages
German (de)
French (fr)
Other versions
EP1782951A1 (en
EP1782951B8 (en
Inventor
Werner Noll
Helmut Thate
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.)
Ardagh Metal Beverage Holdings GmbH and Co KG
Ardagh Metal Packaging Germany GmbH
Original Assignee
Ball Packaging Europe Holding GmbH and Co KG
Ball Packaging Europe 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
Priority to PL05110323T priority Critical patent/PL1782951T3/en
Application filed by Ball Packaging Europe Holding GmbH and Co KG, Ball Packaging Europe GmbH filed Critical Ball Packaging Europe Holding GmbH and Co KG
Priority to ES05110323T priority patent/ES2298951T3/en
Priority to AT05110323T priority patent/ATE380658T1/en
Priority to EP05110323A priority patent/EP1782951B8/en
Priority to DE502005002250T priority patent/DE502005002250D1/en
Priority to RU2008122059/12A priority patent/RU2422287C2/en
Priority to CN2006800503292A priority patent/CN101351340B/en
Priority to AU2006310477A priority patent/AU2006310477B2/en
Priority to UAA200807572A priority patent/UA95618C2/en
Priority to BRPI0618252-6A priority patent/BRPI0618252B1/en
Priority to US12/092,530 priority patent/US8708271B2/en
Priority to PCT/EP2006/068090 priority patent/WO2007051848A1/en
Priority to JP2008539410A priority patent/JP5300484B2/en
Priority to CA2628334A priority patent/CA2628334C/en
Priority to NZ568203A priority patent/NZ568203A/en
Publication of EP1782951A1 publication Critical patent/EP1782951A1/en
Publication of EP1782951B1 publication Critical patent/EP1782951B1/en
Priority to IL191223A priority patent/IL191223A/en
Priority to ZA200804453A priority patent/ZA200804453B/en
Application granted granted Critical
Publication of EP1782951B8 publication Critical patent/EP1782951B8/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/002—Supports of workpieces in machines for printing on hollow articles

Definitions

  • the digital printing replaces the previously applied with a process color and decor of the outer wall of the hollow body.
  • the invention relates to the tensioning dome for a rotationally symmetrical hollow body, in particular for integrally formed from the hull and bottom doses, usually with a dome-shaped inwardly curved bottom.
  • clamping segments are coupled via pins and springs with a cylindrical sliding part (there 97), which reaches over Abschräge vom a Abstell and employment.
  • the springs cause the control of the pressure force, cf. Column 10, lines 52 to 60.
  • the air pressure used via the local channel 89 is neither used to change the radial position of the clamping segments 91, nor the negative pressure is used by the same same channel 89 for clamping purposes of the clamping segment 91. This is also not necessary because the printing according to the local figure 1 and, for example, after the local figure 3 with the pressure transfer station 19a by touch and with rollers that do not require high precision, as is assumed here.
  • Underpressure and overpressure are also used by other documents for sucking and repelling of cans to be treated (processing in the sense of a printing), so US-A 3,548,745 (Enn Sirvet) with the local description in column 2, lines 28 to 33 and the employed printing cylinder 7 after the local figure 1 or US-A 3,356,019 (Albert Zurick) according to column 2, lines 59 to 64, but which also works with a blanket method, cf. there column 1, the first three paragraphs and reference numeral 15 as "impression blanket" in Figure 2.
  • the clamping and holding forces are synchronous and uniform in the interior of the hollow body, in particular as a can or beverage can effective. They can combine with appropriate radial pressure the mandrel and the box to a movement unit whose movements are controlled with utmost accuracy. Any risk of permanent deformation of the hollow body, as it can occur when holding from the outside or only on the front sides, is excluded.
  • the parts and devices used for the controlled movement of the clamping elements are located inside the mandrel.
  • the bottom of the hollow body is used in conjunction with the free end face of the mandrel as a kind of valve element that automatically ensures that when threading the hollow body on the mandrel by means of negative pressure, the soil is applied to the mandrel end, the negative pressure is effective to the clamping segments radially to move externally, whereby they lie under pressure against the inner wall of the hollow body.
  • the claimed method for positionally accurate positioning and controlled - preferably gradual - precision movement of rotationally symmetric, of hull and bottom "integral" (without seam in the bottom area) hollow bodies, especially beverage cans, even with inwardly curved bottom, is made possible by the achieved exact clamping , It is about a precise definition without the risk of damage or deformation of the hollow body.
  • the accuracy of the clamping can be rewritten to achieve the same accuracy of motion transmission, in a sense that can be called "suitable for digital printing".
  • a rest position of the clamping device is achieved by a return hollow force (claim 11 and 14). It pulls the power transmission device back to a rest position. This is in any case suitable to compensate for fluctuating diameter of the hollow body, which can be pushed with varying diameters on the clamping dome.
  • the coupling of the force on the sucked and held hollow body is preferably improved so that the clamping dome has an end face which is adapted at least in the region of the outlet of the axial bore to the shape of the can bottom.
  • a dome-shaped curvature inwards is a dome-shaped curvature inwards (in the case of the tensioning dome) in the axial direction.
  • the actual clamping surface of the mandrel 1 is formed by a plurality of preferably identically formed clamping segments 2a, 2b, 2c, etc. (in short: 2), each having a part-cylindrical outer surface and thus together form a cylindrical clamping surface. They extend over the entire length of the mandrel 1 and are movably guided on the main body of the mandrel in the radial direction.
  • the main body consists of a central, extending over the entire length of the mandrel and beyond one of its front ends out shaft 3, on the corresponding axial distance two end wall elements 6 and 7 are fixed, between which the clamping elements 2 extend.
  • the end wall element 7 at the free front end of the mandrel 1 has a cylindrical wall 11 extending axially a distance far into the interior of the mandrel.
  • the shaft 3 has a continuous axial bore 4 which terminates flush with the free end 5 of the shaft 3 and the outer surface 7a of the end wall element. At an axial distance from this end 5 and in the region of the cylindrical wall 11, the shaft 3 has radial bores 21, which are in communication with the axial bore 4. Slightly further axially to the mandrel interior is on the shaft 3 axially slidably disposed a disk-shaped wall part 10 which is sealingly and slidably guided over a ring member 12 on the cylindrical wall 11.
  • control part 13 is axially outside the pressure chamber 9, but forms together with the disk-shaped wall part 10 is a force transmission device, as will be explained in more detail immediately.
  • the control part 13 has an axial bore 13 a, whose Diameter is significantly larger than the outer diameter of the shaft 3.
  • the control part has a slightly tapered outer surface 19 in the axial direction.
  • the clamping segments 2 on its inside a corresponding, i. to the surface 19 parallel conical surface 17. This can, as shown on separate, but be provided with the clamping segments firmly connected elements.
  • corresponding support and power transmission elements 18 are arranged, which are fixedly connected to one of the two parts 2 and 13 respectively.
  • the radial movement of the clamping segments 2 is effected by means of negative pressure for clamping and overpressure for releasing the voltage. Both pressures are effective via the axial bore 4 of the shaft 3.
  • Both pressures are used to axially apply a one-piece from the bottom and hull box on the mandrel and repel it.
  • the can bottom is used together with the outer surface of the end wall element 7 to automatically trigger the clamping movement of the clamping segments 2 only when the can is properly threaded axially onto the mandrel and to start the ejection process only when the clamping segments have released the can accordingly.
  • the outer surface 7a, 7b of the end wall element 7 is formed so that it has a ringfömige surface contact with the firmly fitting bottom of the can, which stops a suction of air from the outside by the applied negative pressure, so now the negative pressure on the radial bores 21 and the chamber 9 acts on the disc-shaped wall part 10 and this moves together with the control part 13 in Fig. 3 to the left.
  • the clamping segments 2 are moved radially outward via the cooperating conical surfaces.
  • a good coupling is achieved when the shape of the dome-shaped bottom of the hollow body, which is not shown, but generally known, is placed on the shape of the end face of the mandrel.
  • a concave / convex fit is appropriate.
  • the return movement of the adjusting device can be achieved by a spring 40. This is arranged between the control part 13 and the end wall element 6). It ensures that the control member 13 is brought after blowing off the hollow body in a rest position, so-called zero position, and does not stop in an undefined axial position state. Thus, the next hollow body can be properly absorbed and compensated by tolerance diameter fluctuations of the hollow body can be compensated.
  • the arrangement is very simple and yet works extremely fast and accurate.
  • the hollow bodies are covered from the inside over a large area and safely, but also gently by the clamping segments.
  • the necessary movement distances of the moving parts of the mandrel are small.
  • the control by means of negative pressure and overpressure is simple and reliable.
  • the can and mandrel form a functional unit that can be reliably moved by controlled movement of the shaft 3 in any direction and with every step and stepping speed.

Landscapes

  • Coating Apparatus (AREA)
  • Making Paper Articles (AREA)
  • Jigs For Machine Tools (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manipulator (AREA)
  • Winding Of Webs (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Printing Methods (AREA)

Abstract

Mandrel has several clamping segments (2a) forming cylindrical clamping surface (16) for engaging inner surface of hollow body and the clamping segments are guided to move radially in a synchronous manner. A power transmission device (10,13) is arranged inside the mandrel for controlling radial movement of the clamping segments by which the clamped hollow body is moved in a precisely controlled manner. An independent claim is also included for procedure for accurate positioning and controlling the hollow body.

Description

Vorgeschlagen werden ein Verfahren und ein Spanndom zum Aufnehmen und exakten Festlegen von Hohlkörpern für die Ausführung von gesteuerten Präzisionsbewegungen. Damit soll erreicht werden, die Position des Hohlkörpers so genau steuern zu können, dass eine digitale Bedruckung der Außenwand des Hohlkörpers in einer hohen Genauigkeit möglich wird. Die digitale Bedruckung (digital printing) ersetzt die bisher mit einem Verfahren aufgebrachten Farb- und Dekorgebung der Außenwand des Hohlkörpers.Proposed are a method and a tensioning dome for receiving and accurately setting hollow bodies for performing controlled precision movements. This is intended to be able to control the position of the hollow body so precisely that a digital printing of the outer wall of the hollow body is possible in a high accuracy. The digital printing (digital printing) replaces the previously applied with a process color and decor of the outer wall of the hollow body.

Die Erfindung betrifft den Spanndom für einen rotationssymmetrischen Hohlkörper, insbesondere für aus Rumpf und Boden einstückig ausgebildete Dosen, meist mit einem domförmig nach innen gewölbten Boden.The invention relates to the tensioning dome for a rotationally symmetrical hollow body, in particular for integrally formed from the hull and bottom doses, usually with a dome-shaped inwardly curved bottom.

Es ist bekannt, dass für eine Bearbeitung, insbesondere für das Bedrucken oder Dekorieren der Außenfläche von derartigen Hohlkörpern, eine exakt gesteuerte, zumeist schrittweise, Bewegung oder Rotation des Hohlkörpers für die Genauigkeit und Zuverlässigkeit der Bearbeitung der Außenfläche außerordentlich wichtig ist, vgl. US-A 6,769,357 (Joe Finan ).It is known that for a processing, in particular for printing or decorating the outer surface of such hollow bodies, an exactly controlled, usually stepwise, movement or rotation of the hollow body for the accuracy and reliability of the processing of the outer surface is extremely important, cf. US-A 6,769,357 (Joe Finan ).

Aus der US-A 3,960,073 (Rush ) ist eine Druckeinrichtung bekannt, welche mit Walzen zum Drucken arbeitet, vgl. dort Zusammenfassung, Zeichnung zur Zusammenfassung, Arbeitsstation 19A mit zugehöriger Walze zur Bedruckung der Dose auf dem Mandrel 13B. In der weitergehenden Beschreibung zur Funktion der dort verwendeten Spanndorne ist auf die dortigen Figuren 6 bis 10 zu verweisen, die detaillierter in Spalte 10 ab Zeile 22 bis Zeile 60 erläutert werden. Es ist eine mit Unterdruck und Überdruck gesteuerte Anziehung und Abstoßung einer Getränkedose auf den bzw. von dem Spanndorn vorgesehen, vgl. dort Spalte 10, Zeilen 23 bis 27. Die Dose selbst wird aber nicht nur durch den Unterdruck axial gehalten, sondern auch nach den dortigen Figuren 7 und 8 durch ein radiales Ausstellen von mehreren, umfänglich verteilten Spannsegmenten, dort 91 bezeichnet. Diese Spannsegmente sind über Stifte und über Federn mit einem zylindrischen Gleitteil (dort 97) gekoppelt, das über Schrägflächen eine Abstellung und Anstellung erreicht. Die Federn bewirken die Steuerung der Andruckkraft, vgl. dort Spalte 10, Zeilen 52 bis 60. Der verwendete Luftdruck über den dortigen Kanal 89 wird weder zur Veränderung der radialen Position der Spannsegmente 91 verwendet, noch wird der Unterdruck durch den dortigen gleichen Kanal 89 zu Spannzwecken des Spannsegments 91 eingesetzt. Das ist auch nicht erforderlich, weil die Bedruckung nach der dortigen Figur 1 und beispielsweise auch nach der dortigen Figur 3 mit der Druckübertragungsstation 19a durch Berührung und mit Walzen geschieht, die keine hochgenaue Präzision benötigen, wie es hier vorausgesetzt wird. Unterdruck und Überdruck wird auch von anderen Dokumenten zum Ansaugen und Abstoßen von zu behandelnden Dosen (Bearbeitung im Sinne einer Bedruckung) verwendet, so US-A 3,548,745 (Enn Sirvet) mit der dortigen Beschreibung in Spalte 2, Zeilen 28 bis 33 und dem angestellten Druckzylinder 7 nach der dortigen Figur 1 oder US-A 3,356,019 (Albert Zurick) gemäß dortiger Spalte 2, Zeilen 59 bis 64, die aber auch mit einem Drucktuchverfahren arbeitet, vgl. dort Spalte 1, die ersten drei Absätze und Bezugszeichen 15 als "impression blanket" in Figur 2.From the US-A 3,960,073 (Rush ) is known a printing device which works with rollers for printing, see. there summary, drawing to summary, workstation 19A with associated roller for printing the can on the mandrel 13B. In the further description of the function of the mandrels used there is to refer to the figures 6 to 10 there, which are explained in more detail in column 10 from line 22 to line 60. It is provided with a vacuum and pressure controlled attraction and repulsion of a beverage can on or from the mandrel, see. there column 10, lines 23 to 27. The can itself is not only axially held by the negative pressure, but also referred to the local figures 7 and 8 by a radial issuing of several circumferentially distributed clamping segments, 91 there. These clamping segments are coupled via pins and springs with a cylindrical sliding part (there 97), which reaches over Abschrägeflächen a Abstell and employment. The springs cause the control of the pressure force, cf. Column 10, lines 52 to 60. The air pressure used via the local channel 89 is neither used to change the radial position of the clamping segments 91, nor the negative pressure is used by the same same channel 89 for clamping purposes of the clamping segment 91. This is also not necessary because the printing according to the local figure 1 and, for example, after the local figure 3 with the pressure transfer station 19a by touch and with rollers that do not require high precision, as is assumed here. Underpressure and overpressure are also used by other documents for sucking and repelling of cans to be treated (processing in the sense of a printing), so US-A 3,548,745 (Enn Sirvet) with the local description in column 2, lines 28 to 33 and the employed printing cylinder 7 after the local figure 1 or US-A 3,356,019 (Albert Zurick) according to column 2, lines 59 to 64, but which also works with a blanket method, cf. there column 1, the first three paragraphs and reference numeral 15 as "impression blanket" in Figure 2.

Es ist Aufgabe der Erfindung, eine exakt gesteuerte, zumeist schrittweise Bewegung oder Rotation des Hohlkörpers durch Spannen von innen zu ermöglichen, dies auch bei hoher Geschwindigkeit einer digitalen Bedruckung und/oder eines Hohlkörperwechsels. It is an object of the invention to enable a precisely controlled, usually stepwise movement or rotation of the hollow body by clamping from the inside, even at high speed digital printing and / or a hollow body change.

Diese Aufgabe wird durch einen Spanndom mit den Merkmalen des Anspruchs 1 gelöst, alternativ mit dem Verfahren nach Anspruch 12.This object is achieved by a tensioning dome having the features of claim 1, alternatively by the method according to claim 12.

Die Spann- und Haltekräfte werden synchron und gleichmäßig im Inneren des Hohlkörpers, insbesondere als Dose oder Getränkedose wirksam. Sie können so mit entsprechendem radialem Druck den Dorn und die Dose zu einer Bewegungseinheit vereinigen, deren Bewegungen mit höchster Genauigkeit steuerbar sind. Jede Gefahr für eine bleibende Verformung des Hohlkörpers, wie sie bei einem Halten von außen oder nur an den Stirnseiten auftreten kann, ist ausgeschlossen.The clamping and holding forces are synchronous and uniform in the interior of the hollow body, in particular as a can or beverage can effective. They can combine with appropriate radial pressure the mandrel and the box to a movement unit whose movements are controlled with utmost accuracy. Any risk of permanent deformation of the hollow body, as it can occur when holding from the outside or only on the front sides, is excluded.

Die zur gesteuerten Bewegung der Spannelemente verwendeten Teile und Einrichtungen befinden sich im Inneren des Spanndorns.The parts and devices used for the controlled movement of the clamping elements are located inside the mandrel.

Besonders vorteilhaft im Hinblick auf Einfachheit, Zeitaufwand und Wirksamkeit sind Unterdruck und Kopplung auf den Hohlkörper (Anspruch 1). Einmal sind Anlegung und Steuerung von Unterdruck (Anspruch 1) bzw. Überdruck (Anspruch 2) im Inneren des Spanndorns ohne großen Aufwand und mit großer Exaktheit und Geschwindigkeit möglich. Zum anderen wird damit zugleich das Auffädeln und Abstoßen des Hohlkörpers auf den Spanndorn bzw. vom Spanndorn ohne zusätzliche Mittel erreicht (Anspruch 13).Particularly advantageous in terms of simplicity, time and efficiency are negative pressure and coupling to the hollow body (claim 1). Once application and control of vacuum (claim 1) or pressure (claim 2) in the interior of the mandrel without great effort and with great accuracy and speed are possible. On the other hand, at the same time thus the threading and repelling of the hollow body on the mandrel or mandrel without additional means achieved (claim 13).

Der Boden des Hohlkörpers wird im Zusammenwirken mit der freien Stirnseite des Spanndorns als eine Art Ventilelement genutzt, das selbsttätig dafür sorgt, dass beim Auffädeln des Hohlkörpers auf den Spanndom mittels Unterdruck der Boden sich an die Dornstirnseite legt, der Unterdruck wirksam wird, um die Spannsegmente radial nach außen zu bewegen, wodurch sie sich unter Druck an die Innenwand des Hohlkörpers legen.The bottom of the hollow body is used in conjunction with the free end face of the mandrel as a kind of valve element that automatically ensures that when threading the hollow body on the mandrel by means of negative pressure, the soil is applied to the mandrel end, the negative pressure is effective to the clamping segments radially to move externally, whereby they lie under pressure against the inner wall of the hollow body.

Das beanspruchte Verfahren zum stellungsgenauen Positionieren und zur gesteuerten - vorzugsweise schrittweisen - Präzisionsbewegung von rotationssymmetrischen, aus Rumpf und Boden "einstückig bestehenden" (ohne Falznaht im Bodenbereich) Hohlkörpern, insbesondere Getränkedosen, auch mit nach innen gewölbtem Boden, wird ermöglicht durch das erreichte genaue Spannen. Es geht um eine genaue Festlegung ohne die Gefahr einer Beschädigung oder Verformung des Hohlkörpers.The claimed method for positionally accurate positioning and controlled - preferably gradual - precision movement of rotationally symmetric, of hull and bottom "integral" (without seam in the bottom area) hollow bodies, especially beverage cans, even with inwardly curved bottom, is made possible by the achieved exact clamping , It is about a precise definition without the risk of damage or deformation of the hollow body.

Die Genauigkeit des Spannens kann so umschrieben werden, dass damit auch eine gleichbedeutende Genauigkeit der Bewegungsübertragung erreicht wird, in einem Sinne, der "geeignet für digitale Bedruckung" genannt werden kann.The accuracy of the clamping can be rewritten to achieve the same accuracy of motion transmission, in a sense that can be called "suitable for digital printing".

Eine Ruhelage der Spanneinrichtung wird durch eine Rückhohlkraft erreicht (Anspruch 11 und 14). Sie zieht die Kraft-Übertragungseinrichtung in eine Ruhelage zurück. Diese ist jedenfalls geeignet, auch schwankende Durchmesser der Hohlkörper auszugleichen, die mit schwankenden Durchmessern auf den Spanndom aufgeschoben werden können.A rest position of the clamping device is achieved by a return hollow force (claim 11 and 14). It pulls the power transmission device back to a rest position. This is in any case suitable to compensate for fluctuating diameter of the hollow body, which can be pushed with varying diameters on the clamping dome.

Die Kopplung der Kraft auf den angesaugten und gehaltenen Hohlkörper, beispielsweise ein Hohlkörper mit dünner Wand wird bevorzugt so verbessert, dass der Spanndom eine Stirnfläche aufweist, die zumindest im Bereich des Austritts der axialen Bohrung an die Form des Dosenbodens angepasst ist. Eine dornförmige Wölbung nach innen (bei dem Hohlkörper) ist eine domförmige Wölbung nach innen (beim Spanndom) in axialer Richtung.The coupling of the force on the sucked and held hollow body, for example, a hollow body with a thin wall is preferably improved so that the clamping dome has an end face which is adapted at least in the region of the outlet of the axial bore to the shape of the can bottom. A dome-shaped curvature inwards (in the case of the hollow body) is a dome-shaped curvature inwards (in the case of the tensioning dome) in the axial direction.

Die Erfindung wird nachfolgend anhand schematischer Zeichnungen an mehreren Ausführungsbeispielen näher beschrieben:

Figur 1
zeigt in perspektivischer Ansicht einen Spanndorn gemäß einem ersten Beispiel der Erfindung.
Figur 2
zeigt schematisch eine Seitenansicht des Spanndorns in einem größeren Maßstab.
Figur 3
zeigt einen schematischen Längsschnitt durch den Spanndorn.
The invention will be described in more detail below with reference to schematic drawings of several exemplary embodiments:
FIG. 1
shows in perspective view a mandrel according to a first example of the invention.
FIG. 2
shows schematically a side view of the mandrel on a larger scale.
FIG. 3
shows a schematic longitudinal section through the mandrel.

Die eigentliche Spannfläche des Spanndorns 1 wird durch mehrere, vorzugsweise gleich ausgebildete Spannsegmente 2a, 2b, 2c usw. (kurz: 2) gebildet, die jeweils eine teilzylindrische Außenfläche aufweisen und damit gemeinsam eine zylindrische Spannfläche bilden. Sie erstrecken sich über die ganze Länge des Dornes 1 und sind an dem Grundkörper des Dornes in radialer Richtung beweglich geführt.The actual clamping surface of the mandrel 1 is formed by a plurality of preferably identically formed clamping segments 2a, 2b, 2c, etc. (in short: 2), each having a part-cylindrical outer surface and thus together form a cylindrical clamping surface. They extend over the entire length of the mandrel 1 and are movably guided on the main body of the mandrel in the radial direction.

Der Grundkörper besteht aus einer zentralen, sich über die gesamte Länge des Dornes und über eines seiner Stirnenden hinaus erstreckenden Welle 3, auf der im entsprechenden axialen Abstand zwei Stirnwandelemente 6 und 7 befestigt sind, zwischen denen sich die Spannelemente 2 erstrecken. Das Stirnwandelement 7 am freien Stirnende des Dornes 1 weist einen sich axial eine Strecke weit ins Innere des Dornes erstreckende zylindrische Wand 11 auf.The main body consists of a central, extending over the entire length of the mandrel and beyond one of its front ends out shaft 3, on the corresponding axial distance two end wall elements 6 and 7 are fixed, between which the clamping elements 2 extend. The end wall element 7 at the free front end of the mandrel 1 has a cylindrical wall 11 extending axially a distance far into the interior of the mandrel.

Die Welle 3 weist eine durchgehende axiale Bohrung 4 auf, die bündig mit dem freien Ende 5 der Welle 3 und der Außenfläche 7a des Stirnwandelementes endet. Im axialen Abstand von diesem Ende 5 und im Bereich der zylindrischen Wand 11 weist die Welle 3 radiale Bohrungen 21 auf, die mit der axialen Bohrung 4 in Verbindung stehen. Etwas weiter axial dem Dorninneren zu ist auf der Welle 3 axial begrenzt verschiebbar ein scheibenförmiger Wandteil 10 angeordnet, der über einen Ringteil 12 abdichtend und gleitend an der zylindrischen Wand 11 geführt ist.The shaft 3 has a continuous axial bore 4 which terminates flush with the free end 5 of the shaft 3 and the outer surface 7a of the end wall element. At an axial distance from this end 5 and in the region of the cylindrical wall 11, the shaft 3 has radial bores 21, which are in communication with the axial bore 4. Slightly further axially to the mandrel interior is on the shaft 3 axially slidably disposed a disk-shaped wall part 10 which is sealingly and slidably guided over a ring member 12 on the cylindrical wall 11.

Mit dem scheibenförmigen Wandteil 10 ist fest verbunden ein rotationssymmetrischer Steuer- oder Betätigungsteil 13. Während das Stirnwandelement 7 mit der zylindrischen Wand 11 und dem scheibenförmigen Wandteil 10 eine Druckkammer 9 bilden, befindet sich der Steuerteil 13 axial außerhalb der Druckkammer 9, bildet aber zusammen mit dem scheibenförmigen Wandteil 10 eine Kraft-Übertragungseinrichtung, wie sogleich noch näher erläutert wird. Der Steuerteil 13 weist eine axiale Bohrung 13a auf, deren Durchmesser deutlich größer als der Außendurchmesser der Welle 3 ist. Mittels zwischengeschalteter Lagerhülsen 20 ist der Steuerteil 13 auf der Welle axial verschieblich geführt und kann so selber den scheibenförmigen Antriebsteil 10 tragen und führen.While the end wall element 7 with the cylindrical wall 11 and the disk-shaped wall part 10 form a pressure chamber 9, the control part 13 is axially outside the pressure chamber 9, but forms together with the disk-shaped wall part 10 is a force transmission device, as will be explained in more detail immediately. The control part 13 has an axial bore 13 a, whose Diameter is significantly larger than the outer diameter of the shaft 3. By means of interposed bearing sleeves 20 of the control part 13 is guided axially displaceably on the shaft and can thus carry the disc-shaped drive member 10 and lead.

Der Steuerteil weist eine in axialer Richtung leicht konisch verlaufende Außenfläche 19 auf.The control part has a slightly tapered outer surface 19 in the axial direction.

Wie aus Figur 3 ersichtlich, weisen die Spannsegmente 2 auf ihrer Innenseite eine entsprechende, d.h. zu der Fläche 19 parallel konische Fläche 17 auf. Diese kann, wie dargestellt auch an gesonderten, aber mit den Spannsegmenten fest verbundenen Elementen vorgesehen sein.As can be seen from Figure 3, the clamping segments 2 on its inside a corresponding, i. to the surface 19 parallel conical surface 17. This can, as shown on separate, but be provided with the clamping segments firmly connected elements.

In dem konischen Zwischenraum zwischen den sich gegenüberliegenden Flächen 17 und 19 sind entsprechende Stütz- und Kraft-Übertragungs-Elemente 18 angeordnet, die mit einem der beiden Teile 2 bzw. 13 fest verbunden sind.In the conical space between the opposing surfaces 17 and 19 corresponding support and power transmission elements 18 are arranged, which are fixedly connected to one of the two parts 2 and 13 respectively.

Die radiale Bewegung der Spannsegmente 2 wird mittels Unterdruck zum Spannen und Überdruck zum Lösen der Spannung bewirkt. Beide Drücke werden über die axiale Bohrung 4 der Welle 3 wirksam.The radial movement of the clamping segments 2 is effected by means of negative pressure for clamping and overpressure for releasing the voltage. Both pressures are effective via the axial bore 4 of the shaft 3.

Beide Drücke werden dazu genutzt, eine einstückig aus Boden und Rumpf bestehende Dose axial auf den Dorn aufzubringen und von diesem abzustoßen. Dabei wird der Dosenboden zusammen mit der Außenfläche des Stirnwandelements 7 verwendet, um automatisch die Spannbewegung der Spannsegmente 2 erst auszulösen, wenn die Dose ordnungsmäßig auf den Dorn axial aufgefädelt ist und den Ausstoßvorgang erst zu beginnen, wenn die Spannsegmente die Dose entsprechend freigegeben haben.Both pressures are used to axially apply a one-piece from the bottom and hull box on the mandrel and repel it. In this case, the can bottom is used together with the outer surface of the end wall element 7 to automatically trigger the clamping movement of the clamping segments 2 only when the can is properly threaded axially onto the mandrel and to start the ejection process only when the clamping segments have released the can accordingly.

Die Außenfläche 7a, 7b des Stirnwandelementes 7 ist so ausgebildet, dass sie mit dem fest anliegenden Dosenboden eine ringfömige flächige Berührung aufweist, die ein Ansaugen von Luft von außen durch den anliegenden Unterdruck stoppt, so dass nunmehr der Unterdruck über die Radialbohrungen 21 und die Kammer 9 auf den scheibenförmigen Wandteil 10 wirkt und diesen zusammen mit dem Steuerteil 13 in Fig. 3 nach links bewegt. Über die zusammenwirkenden konischen Flächen werden dabei die Spannsegmente 2 radial nach außen bewegt.The outer surface 7a, 7b of the end wall element 7 is formed so that it has a ringfömige surface contact with the firmly fitting bottom of the can, which stops a suction of air from the outside by the applied negative pressure, so now the negative pressure on the radial bores 21 and the chamber 9 acts on the disc-shaped wall part 10 and this moves together with the control part 13 in Fig. 3 to the left. The clamping segments 2 are moved radially outward via the cooperating conical surfaces.

Eine gute Kopplung wird erreicht, wenn die Form des domförmigen Bodens des Hohlkörpers, der nicht dargestellt, aber allgemein bekannt ist, auf die Form der Stirnseite des Spanndorns abgestellt ist. Eine konkav/konvexe Anpassung ist geeignet.A good coupling is achieved when the shape of the dome-shaped bottom of the hollow body, which is not shown, but generally known, is placed on the shape of the end face of the mandrel. A concave / convex fit is appropriate.

Wenn die Dose gelöst werden soll, wird über die axiale Bohrung 4 Druckluft in die Kammer 9 geleitet. Diese verschiebt die Teile 10 und 13 und löst die Haltekraft der Spannsegmente 2. Hört diese Haltekraft auf wirkt die Druckluft über das Ende der Bohrung 4 auf den Dosenboden und stößt damit die Dose vom Dorn ab.When the can is to be released, 4 compressed air is passed into the chamber 9 via the axial bore. This shifts the parts 10 and 13 and releases the holding force of the clamping segments 2. If this holding force stops the compressed air acts on the end of the bore 4 on the bottom of the can and repels the can from the mandrel.

Die Rückhohlbewegung der Stelleinrichtung kann durch eine Feder 40 erreicht werden. Diese ist zwischen dem Steuerteil 13 und dem Stirnwandelement 6) angeordnet. Sie erreicht, dass das Steuerteil 13 nach einem Abblasen des Hohlkörpers in eine Ruhelage gebracht wird, sogenannte Nullposition, und nicht in einem undefinierten axialen Stellungszustand stehen bleibt. Damit kann der nächste Hohlkörper einwandfrei aufgenommen werden und durch Toleranz verursachte Durchmesserschwankungen der Hohlkörpers ausgeglichen werden.The return movement of the adjusting device can be achieved by a spring 40. This is arranged between the control part 13 and the end wall element 6). It ensures that the control member 13 is brought after blowing off the hollow body in a rest position, so-called zero position, and does not stop in an undefined axial position state. Thus, the next hollow body can be properly absorbed and compensated by tolerance diameter fluctuations of the hollow body can be compensated.

Die Anordnung ist sehr einfach aufgebaut und arbeitet dennoch außerordentlich rasch und exakt. Die Hohlkörper werden von Innen her großflächig und sicher, aber auch schonend von den Spannsegmenten erfasst. Die notwendigen Bewegungsstrecken der beweglichen Teile des Dornes sind klein. Die Steuerung mittels Unterdruck und Überdruck ist einfach und zuverlässig.The arrangement is very simple and yet works extremely fast and accurate. The hollow bodies are covered from the inside over a large area and safely, but also gently by the clamping segments. The necessary movement distances of the moving parts of the mandrel are small. The control by means of negative pressure and overpressure is simple and reliable.

In der Spannstellung bilden Dose und Dorn eine funktionelle Einheit, die durch gesteuerte Bewegung der Welle 3 in jeder Richtung und mit jeder Schrittweite und Schrittgeschwindigkeit zuverlässig bewegt werden kann.In the clamping position, the can and mandrel form a functional unit that can be reliably moved by controlled movement of the shaft 3 in any direction and with every step and stepping speed.

Claims (17)

  1. Tightening mandrel for a rotationally symmetrical hollow body as a drinks can consisting integrally of body and base, having a shaft (3, 4) provided with an axial bore, and having
    - several tightening segments (2; 2a, 2b, 2c) forming an outwardly pointing cylindrical tightening surface (16) for negative pressure-actuated engagement on an inner surface of the hollow body; wherein the tightening segments (2; 2a, 2b 2c) are guided to be radially movable;
    - a force-transmitting device (10, 13) arranged in the interior of the tightening mandrel (1), which can be actuated for tightening by a negative pressure supplied via the axial bore (4) and controls a synchronous radial movement of all tightening segments (2; 2a, 2b, 2c);
    suitable for a negative pressure-actuated fixing of the hollow body to be tightened for a controlled precision movement of the tightened hollow body.
  2. Tightening mandrel according to claim 1, for the rotationally symmetrical hollow body as the drinks can consisting integrally of body and base, wherein
    - the several tightening segments (2; 2a, 2b, 2c) forming the outwardly pointing cylindrical tightening surface (16) engage on the inner surface of the hollow body;
    - the force-transmitting device (10, 13) arranged in the interior of the tightening mandrel (1) for release of all tightening segments (2; 2a, 2b, 2c) from the inner surface of the hollow body can be actuated by an excess pressure supplied via the axial bore (4) and controls a synchronous radial movement of all tightening segments (2; 2a, 2b, 2c);
    - suitable for an excess pressure-actuated release of the hollow body tightened for the controlled precision movement from the tightening mandrel.
  3. Tightening mandrel according to claim 1 or 2, wherein the particular type of pressure serving for control of the different pressure forces is effective at the same time in each case for applying the hollow body to the tightening mandrel (1) or for repelling the hollow body from the tightening mandrel (1).
  4. Tightening mandrel according to one of the preceding claims, wherein a base body (3, 6, 7) having the rotatably drivable shaft (3) is provided with the axial bore (4) leading into a free end-face surface (5) of the shaft and two end-face wall elements (6, 7) arranged firmly on the shaft at an axial distance, and the end-face wall element (7) facing the base of the hollow body in operation of the mandrel closes flush with the end-face surface (5) of the shaft (3) with its axial outer surface (7a), in particular adapted to a shape of the base of the hollow body.
  5. Tightening mandrel according to claim 4, wherein a rotationally symmetrical control part (13) of the force-transmitting device (10, 13), the outer peripheral surface (19) of which runs conically in axial direction and as a function of a relative axial movement of the control part (13) on the shaft (3), converts this movement into a corresponding radial synchronous adjusting movement of the tightening segments (2), is guided to be axially displaceable on the drivable shaft (3).
  6. Tightening mandrel according to claim 5, wherein the control part (13) with one of its end-face sides is connected firmly to a disc-like drive part (10) guided to be axially displaceable in the base body, which drive part (10) in turn can be acted upon controlled by the compressed air or by the negative pressure.
  7. Tightening mandrel according to claim 6, wherein the disc-like drive part (10) forms a movable limiting wall of a pressure chamber (9), which on the other side is limited by the end-face wall (7) expanded like a chamber (11) and facing the base of the hollow body in operation, wherein the pressure chamber (9) is connected via radial bores (21) in the shaft (3) to its axial bore (4).
  8. Tightening mandrel according to one of claims 1 to 7, wherein the shaft (3) is mounted in a support head which can be rotated in index steps outside of the tightening mandrel (1) together with a plurality of similar mandrels and is equipped at its end with a separate controllable, stage-wise operating drive, and its axial bore (4) can be connected in controlled manner to a source of higher or lower pressure.
  9. Tightening mandrel according to one of claims 5 to 8, characterised in that the control part (13) is guided to be axially displaceable via sliding pieces (20) arranged on the shaft (3).
  10. Tightening mandrel according to one of claims 5 to 9, wherein
    (i) each tightening segment (2a, 2b) has on its inner side an inner surface (17) which is conical in axial direction or is firmly connected to a part (15) having such an inner surface, wherein the conical inner surface (17) runs parallel to the conical outer surface (19) of the control part (13), but at a distance from the latter,
    (ii) each tightening segment (2a, 2b; ...) in the region of the conical inner surface (17) is firmly connected to sliding pieces (18) which can be moved in sliding manner with respect to the conical outer surface (19).
  11. Tightening mandrel according to one of the previous claims 1 to 10, wherein a control part (13) of the force-transmitting device is stressed by a return device (40), which applies an axial force away from the hollow body or a front end-face side (5, 7a) of the tightening mandrel (1) axially rearwards.
  12. Process for the position-precise positioning and for controlled precision movement of rotationally symmetrical hollow bodies formed integrally from body and base with the aid of a tightening mandrel which can be moved in controlled manner for each hollow body, in which process
    - the particular hollow body is applied to the tightening mandrel (2) via a negative pressure and positioned axially on the latter;
    - the hollow body is clamped by the same negative pressure synchronously under compressive force of tightening elements (2a, 2b) acting radially from inside to outside to form a movement unit with the tightening mandrel.
  13. Process according to claim 12, wherein the movement unit comprising tightening mandrel and hollow body is released with the aid of compressed air and the hollow body is removed axially from the tightening mandrel by the same compressed air.
  14. Process according to one of the previous claims 12 or 13, wherein a control part (13) is stressed as a force-transmitting device by a return device (40), which applies an axial force away from the hollow body or a front end-face side (5, 7a) of the tightening mandrel axially rearwards.
  15. Process according to the previous claim 14, wherein the return device is a spring, which is preferably pretensioned in the withdrawn rest position of the control part (13).
  16. Process according to one of the previous claims 14 or 15, wherein the control part (13) is returned by the axial force stress after a particular removal of a hollow body from the tightening mandrel to a neutral rest position, which is positioned so that even hollow bodies of varying diameter may be taken up axially by the tightening mandrel in the rest position of the control part (13).
  17. Process according to claim 12, wherein the precision movement is effected in stages.
EP05110323A 2005-11-03 2005-11-03 Mandrel for digital printing Active EP1782951B8 (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
ES05110323T ES2298951T3 (en) 2005-11-03 2005-11-03 SUBJECTION CLAMP FOR DIGITAL PRINTING.
AT05110323T ATE380658T1 (en) 2005-11-03 2005-11-03 Clamping mandrel for digital printing
EP05110323A EP1782951B8 (en) 2005-11-03 2005-11-03 Mandrel for digital printing
DE502005002250T DE502005002250D1 (en) 2005-11-03 2005-11-03 Mandrel for digital printing
PL05110323T PL1782951T3 (en) 2005-11-03 2005-11-03 Mandrel for digital printing
NZ568203A NZ568203A (en) 2005-11-03 2006-11-03 Clamping mandrel for digital printing on can bodies
AU2006310477A AU2006310477B2 (en) 2005-11-03 2006-11-03 Mandrel used for digital printing on can members
UAA200807572A UA95618C2 (en) 2005-11-03 2006-11-03 Clamping mandrel for digital printing on jar body
BRPI0618252-6A BRPI0618252B1 (en) 2005-11-03 2006-11-03 FIXING FRAME FOR CANAL BODY DIGITAL PRINTING
US12/092,530 US8708271B2 (en) 2005-11-03 2006-11-03 Mandrel used for digital printing on can members
RU2008122059/12A RU2422287C2 (en) 2005-11-03 2006-11-03 Clamping holder for digital printing on can body
JP2008539410A JP5300484B2 (en) 2005-11-03 2006-11-03 Mandrels used for digital printing on containers
CA2628334A CA2628334C (en) 2005-11-03 2006-11-03 Mandrel used for digital printing on can members
CN2006800503292A CN101351340B (en) 2005-11-03 2006-11-03 Mandrel used for digital printing on can members, its positioning and control method
PCT/EP2006/068090 WO2007051848A1 (en) 2005-11-03 2006-11-03 Mandrel used for digital printing on can members
IL191223A IL191223A (en) 2005-11-03 2008-05-01 Mandrel for use for digital printing on can members
ZA200804453A ZA200804453B (en) 2005-11-03 2008-05-22 Mandrel used for digital printing on can members

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05110323A EP1782951B8 (en) 2005-11-03 2005-11-03 Mandrel for digital printing

Publications (3)

Publication Number Publication Date
EP1782951A1 EP1782951A1 (en) 2007-05-09
EP1782951B1 true EP1782951B1 (en) 2007-12-12
EP1782951B8 EP1782951B8 (en) 2008-05-28

Family

ID=36090912

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Application Number Title Priority Date Filing Date
EP05110323A Active EP1782951B8 (en) 2005-11-03 2005-11-03 Mandrel for digital printing

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US (1) US8708271B2 (en)
EP (1) EP1782951B8 (en)
JP (1) JP5300484B2 (en)
CN (1) CN101351340B (en)
AT (1) ATE380658T1 (en)
AU (1) AU2006310477B2 (en)
BR (1) BRPI0618252B1 (en)
CA (1) CA2628334C (en)
DE (1) DE502005002250D1 (en)
ES (1) ES2298951T3 (en)
IL (1) IL191223A (en)
NZ (1) NZ568203A (en)
PL (1) PL1782951T3 (en)
RU (1) RU2422287C2 (en)
UA (1) UA95618C2 (en)
WO (1) WO2007051848A1 (en)
ZA (1) ZA200804453B (en)

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JP5300484B2 (en) 2013-09-25
CA2628334C (en) 2014-12-16
NZ568203A (en) 2010-10-29
ZA200804453B (en) 2009-02-25
RU2422287C2 (en) 2011-06-27
PL1782951T3 (en) 2008-05-30
CN101351340B (en) 2010-12-29
ATE380658T1 (en) 2007-12-15
WO2007051848A1 (en) 2007-05-10
RU2008122059A (en) 2009-12-20
US20080282913A1 (en) 2008-11-20
CA2628334A1 (en) 2007-05-10
EP1782951A1 (en) 2007-05-09
CN101351340A (en) 2009-01-21
AU2006310477B2 (en) 2011-08-18
BRPI0618252B1 (en) 2018-05-22
UA95618C2 (en) 2011-08-25
DE502005002250D1 (en) 2008-01-24
JP2009514707A (en) 2009-04-09
US8708271B2 (en) 2014-04-29
IL191223A (en) 2010-12-30
BRPI0618252A2 (en) 2011-08-23
WO2007051848A9 (en) 2007-08-16
EP1782951B8 (en) 2008-05-28
AU2006310477A1 (en) 2007-05-10
ES2298951T3 (en) 2008-05-16

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