EP0199830B1 - Method and device for creating on a package blank a spot to be pierced by a straw - Google Patents

Method and device for creating on a package blank a spot to be pierced by a straw Download PDF

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Publication number
EP0199830B1
EP0199830B1 EP85104124A EP85104124A EP0199830B1 EP 0199830 B1 EP0199830 B1 EP 0199830B1 EP 85104124 A EP85104124 A EP 85104124A EP 85104124 A EP85104124 A EP 85104124A EP 0199830 B1 EP0199830 B1 EP 0199830B1
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EP
European Patent Office
Prior art keywords
blank
spindle
wall
preferably according
cut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85104124A
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German (de)
French (fr)
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EP0199830A1 (en
Inventor
Jörg P. Weltert
Heinz Dietrich
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.)
Elopak AS
Original Assignee
Elopak AS
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Filing date
Publication date
Application filed by Elopak AS filed Critical Elopak AS
Priority to AT85104124T priority Critical patent/ATE33235T1/en
Priority to DE8585104124T priority patent/DE3562006D1/en
Priority to EP85104124A priority patent/EP0199830B1/en
Publication of EP0199830A1 publication Critical patent/EP0199830A1/en
Application granted granted Critical
Publication of EP0199830B1 publication Critical patent/EP0199830B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/16—Perforating by tool or tools of the drill type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/001—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs made from laminated webs, e.g. including laminating the webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring

Definitions

  • the present invention relates to a method and a device for producing a non-continuous incision of a tubular longitudinally glued or welded packaging blank made of laminated cardboard for liquid-absorbing containers provided for piercing by means of a suction tube.
  • the endless packaging blank webs are provided with a tab-shaped punching at a marked point, the edge of which - and only this one - only allows the tip of a suction tube to be sucked in to suck the contents on this marking line.
  • the packaging material is too hard inside or outside this line and the tip of the suction tube cannot penetrate.
  • Such a line-shaped area is produced, for example, by the method by means of a rotating spindle, at the end of which there is an insert with a circular knife, which is lowered into the paper web to a finely adjustable depth and cuts a circular-cylindrical cut in this paper web.
  • the hollow cylindrical core remains connected to the paper web unless it is accidentally carried away when the cutting tool is removed. The rotary movement of the circular cutting edge cuts the paper web evenly to the intended depth.
  • the insertion of the suction tube can be seen through the circular contour of the paper web surface facing outwards.
  • this requires an exact placement of the tube tip as well as setting up the printed packaging material web in order to coordinate its position precisely with the punching tool.
  • This in turn requires precise running control of the packaging material web, which makes the creation of these predetermined breaking points more expensive (EP-A-0065179).
  • the present invention aims to provide a method which, without regulating the packaging material web, allows not only a linear but also a flat insertion point to be set, so that the precise aiming when the suction tube is inserted, the control for a precise synchronous operation of the packaging material web and of the punching tool.
  • a method which fulfills this condition is distinguished according to the invention in that the blank is relentlessly supported at the intended location in the interior of the tube and then the incision is milled out as a solid cylinder from the supported blank wall location.
  • the packaging blanks to be milled are supplied in a milling device 1 by means of a rotary star 3.
  • This rotary star 3 is provided with arms 4, on which the packaging blanks, normally glued or welded on one long side, are pushed over the arms 4 and made available for milling.
  • the milling point is marked by means of an anvil 5, which is fastened in each arm 4.
  • a frame 7 belongs to the actual milling device 1.
  • a precision spindle 9 with a collet 10 serves to accommodate a hard metal milling cutter 11, which is arranged exactly coaxially with the anvil 5 in the milling position.
  • the precision spindle 9 is connected to a feed device 14 via a holder 13, while the holder 13 itself is connected via a base plate 15 to a supporting structure explained later.
  • Brackets 16 and 17 for holding a piston rod 18 are provided at both ends of the base plate 15.
  • Two cylinders 19 and 20, connected to the holder 13 via a connecting plate 23 and a driving wedge 24, enable the precision spindle 9 and thus the carbide milling cutter 11 to be moved back and forth in a controlled manner.
  • a pressure plate 30 with a front holding head 31 is elastically connected to a front spindle housing 32 via two O-rings 33 and 34 in the axial direction, ie the feed direction of the hard metal milling cutter 11. It would also be possible to provide other spring-elastic elements, for example leaf springs or the like.
  • the pressure plate 30 and the front spindle housing 32 have opposing measurement reference planes 35 and 36, the spacing of which, in the idle state of the device, determines the milling depth or the working stroke to be carried out for the metal milling cutter 11.
  • the holding head 31 is provided with a bore 38 through which the milling point of milling chips can be kept clean by means of compressed or suction air.
  • the pressure plate 30 is by means of guide screw pins 39, which are screwed into the front spindle housing 32, are guided so that the two O-rings 33 and 34 are only the spring-elastic connecting elements, but without a guiding function between the pressure plate 30 and the spindle housing 32.
  • a micrometer intermediate ring 42 is arranged for the purpose of fine adjustment, which consists of a front single ring 43, a rear single ring 44 and a rotating ring 45. Due to the micrometer thread 48 common to all rings, the ring gap between the two individual rings 43 and 44 can be adjusted to a hundredth of a millimeter by turning the rotating ring 45, which results in a very precise depth dimension for the point to be milled.
  • the feed of the hard metal milling cutter 11 for milling the desired puncture point in the packaging blank according to FIG. 1 is adjusted in such a way that the front working edges of the milling cutter 11 are set flush with the front bearing surface of the holding head 31. Then turn the rotary ring 45 on its scale, e.g. the distance between the two measurement reference planes 35 and 36 is fixed on the corresponding anvil 5 holding head 31, whereby the milling device 1 is basically ready for operation.
  • a rough adjustment is made by loosening the screw 25 and moving the precision spindle 9 in the holder 13 and then tightening the screw 25.
  • the drive i.e. Advancement and retraction of the carbide milling cutter 11 takes place by means of the piston / cylinder unit 18, 19, 20, in that the cylinders 19 and 20 are supplied with a pressure medium in a liquid or gaseous state.
  • the control of such piston / cylinder units is known and is not explained in the following, since it does not form part of the invention.
  • the actual milling process takes place in such a way that, as shown in FIG. 3, a packaging blank that corresponds to the cross section of a star 4 and is glued along one side, labeled 50 in FIG. 1, is pushed onto the arm 4 from the delivery station.
  • the packaging blank 50 (FIG. 4) gets into the milling device 1 in such a way that the hard metal milling cutter 11 lies exactly coaxially with the anvil 5.
  • the movement device i.e. of the piston / cylinder unit 18, 19, 20
  • the hard metal milling cutter 11 which is driven by the precision spindle 9 will penetrate into the packaging wall, the front surface of the holding head 31 pressing this packaging wall firmly onto the arm 4 or the anvil 5.
  • the hard metal milling cutter 11 is pushed against the spring force of the 0-rings 33, 34 forwards with respect to the holding head 31 into the packaging material wall.
  • the milling cutter 11 penetrates deep into the wall until the two measurement reference planes 35 and 36 lie one on top of the other. Then the desired milling depth is reached and a milling recess 51, for example half the wall thickness, is reached.
  • a milling recess 51 for example half the wall thickness
  • a section with the milled point is shown schematically. It is a cardboard 55 which has an outer protective layer 56 and an inner protective layer 57, followed by an aluminum foil 58 and a second inner protective layer 59.
  • the cutout 61 will have a depth, for example, which corresponds to half the total layer thickness of the packaging wall at this point. The depth depends on the straw material and the resistance of the carton 55 as well as the inner three layers 57, 58 and 59. As explained, it can be easily adjusted.
  • the precision spindle 9 or the hard metal milling cutter 11 can be fed by means of compressed air, its speed being adaptable to the conditions in a very wide range.
  • the micrometer intermediate ring 52 is preferably calibrated so that a full rotation of the rotary ring 45 corresponds to a pitch of one mm.
  • the anvils 5 can, for example, be screwed into corresponding recesses in the arms 4 of the rotary star 3 in such a way that they are flush with the surrounding star arm plane.
  • the device described allows easy replacement of all parts, especially the milling cutter.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Making Paper Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

1. Process for producing a discontinuous recess (51), intended to be pierced by a suction tube (52), in a tubular, longitudinally glued or welded packing blank (50) in sheet-lined board for receptacles carrying liquids, characterised in that the blank (50) is supported (5) inflexibly at the intended point in the interior of the tube and then the recess is cut out of the supported point in the blank wall as a solid cylinder.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum Herstellen eines zum Durchstechen mittels eines Saugröhrchens vorgesehenen, nicht durchgehenden Einschnittes eines röhrenförmigen längsverleimten oder -geschweissten Verpackungszuschnittes aus kaschiertem Karton für Flüssigkeit aufnehmende Behältnisse.The present invention relates to a method and a device for producing a non-continuous incision of a tubular longitudinally glued or welded packaging blank made of laminated cardboard for liquid-absorbing containers provided for piercing by means of a suction tube.

Bei der bisherigen Praxis zum Markieren einer Durchstechstelle in Verpackungen für Getränke werden die endlosen Verpackungs-Zuschnittbahnen an einer markierten Stelle mit einer lappenförmigen Anstanzung versehen, deren Rand - und nurdieser-das Einstechen der Spitze eines Saugröhrchens zum Saugen des Inhaltes ausschliesslieh auf dieser Markierlinie erlaubt. Innerhalb oder ausserhalb dieser Linie ist das Verpackungsmaterial zu hart und die Spitze des Saugröhrchens kann nicht eindringen.In previous practice for marking a piercing point in packaging for beverages, the endless packaging blank webs are provided with a tab-shaped punching at a marked point, the edge of which - and only this one - only allows the tip of a suction tube to be sucked in to suck the contents on this marking line. The packaging material is too hard inside or outside this line and the tip of the suction tube cannot penetrate.

Ein derartiger linienförmiger Bereich wird beispielsweise nach dem Verfahren mittels einer rotierenden Spindel erzeugt, an deren Ende ein Einsatz mit kreisförmigem Messer sitzt, das in feineinstellbare Tiefe in die Papierbahn abgesenkt wird und einen kreiszylinderförmigen Schnitt in diese Papierbahn schneidet. Dabei bleibt der hohlzylindrische Kern mit der Papierbahn verbunden, sofern er nicht versehentlich beim Herausführen des Schneidwerkzeuges mitgerissen wird. Durch die Drehbewegung der kreisförmigen Schneidkante erfolgt eine Anschneidung der Papierbahn gleichmässig in die vorgesehene Tiefe.Such a line-shaped area is produced, for example, by the method by means of a rotating spindle, at the end of which there is an insert with a circular knife, which is lowered into the paper web to a finely adjustable depth and cuts a circular-cylindrical cut in this paper web. The hollow cylindrical core remains connected to the paper web unless it is accidentally carried away when the cutting tool is removed. The rotary movement of the circular cutting edge cuts the paper web evenly to the intended depth.

Bei dieser Ausführung ist wohl das Einführen des Saugröhrchens durch die kreisförmige Kontur der nach aussen gekehrten Papierbahnfläche ersichtlich. Dies verlangt aber ein genaues Ansetzen der Röhrchenspitze sowie ein Einrichten der bedruckten Verpackungsmaterialbahn, um sie mit dem Stanzwerkzeug bezüglich Lage genau zu koordinieren. Dies wiederum verlangt eine genaue Laufsteuerung der Verpackungsmaterialbahn, wodurch die Erstellung dieser Sollbruchstellen verteuertwird (EP-A-0065179).In this embodiment, the insertion of the suction tube can be seen through the circular contour of the paper web surface facing outwards. However, this requires an exact placement of the tube tip as well as setting up the printed packaging material web in order to coordinate its position precisely with the punching tool. This in turn requires precise running control of the packaging material web, which makes the creation of these predetermined breaking points more expensive (EP-A-0065179).

Die vorliegende Erfindung bezweckt die Schaffung eines Verfahrens, welches ohne Regulieren der Verpackungsmaterialbahn ein Festlegen nicht nur einer linienförmigen, sondern einer flächenförmigen Einstechstelle erlaubt, so dass das genaue Zielen beim Einstechen des Saugröhrchens dahinfällt, ebenso die Steuerung für einen genauen Synchronlauf der Verpackungs-Materialbahn und des Stanzwerkzeuges.The present invention aims to provide a method which, without regulating the packaging material web, allows not only a linear but also a flat insertion point to be set, so that the precise aiming when the suction tube is inserted, the control for a precise synchronous operation of the packaging material web and of the punching tool.

Ein Verfahren, welches diese Bedingung erfüllt, zeichnet sich erfindungsgemäss dadurch aus, dass man den Zuschnitt an der vorgesehenen Stelle im Rohrinnern unnachgiebig stützt und anschliessend den Einschnitt als Vollzylinder aus der gestützten Zuschnittswandstelle ausfräst.A method which fulfills this condition is distinguished according to the invention in that the blank is relentlessly supported at the intended location in the interior of the tube and then the incision is milled out as a solid cylinder from the supported blank wall location.

Die Erfindung wird anschliessend beispielsweise anhand einer Zeichnung erläutert.The invention is subsequently explained, for example, using a drawing.

Es zeigen:

  • Fig. 1 einen Ausschnitt aus einem in perspektivischer Darstellung beidseitig offenen Verpakkungszuschnitt, mit zum Durchstechen vorbereiteter Frässtelle,
  • Fig. 2 einen Schnitt durch die Wand des Verpakkungszuschnittes mit der ausgefrästen Stelle, gemäss Schnittlinie 11-11 der Fig. 1,
  • Fig. 3 einen Teil einer Zuführvorrichtung für das Zuführen der Verpackungszuschnitte zur Frässtelle,
  • Fig. 4 eine Aufsicht, teilweise im Schnitt, der Ausführung gemäss Fig. 3,
  • Fig. 5 einen vergrösserten Ausschnitt der Fräsanlage mit weggebrochenen Teilen, gemäss den Fig. 3 und 4.
Show it:
  • 1 shows a detail from a packaging blank open on both sides in a perspective view, with a milling point prepared for piercing,
  • 2 shows a section through the wall of the packaging blank with the milled point, according to section line 11-11 of FIG. 1,
  • 3 shows a part of a feeding device for feeding the packaging blanks to the milling point,
  • 4 is a top view, partly in section, of the embodiment according to FIG. 3,
  • 5 shows an enlarged section of the milling system with parts broken away, according to FIGS. 3 and 4.

In einer Anfräsvorrichtung 1 werden die zu fräsenden Verpackungszuschnitte mittels eines Drehsternes 3 zugeliefert. Dieser Drehstern 3 ist mit Armen 4 versehen, auf welchen die Verpakkungszuschnitte, normalerweise auf einer Längsseite verleimt oder geschweisst, über die Arme 4 geschoben, zum Anfräsen bereitgestellt werden. Die Anfrässtelle ist mittels eines Ambosses 5, der in jedem Arm 4 befestigt ist, markiert.The packaging blanks to be milled are supplied in a milling device 1 by means of a rotary star 3. This rotary star 3 is provided with arms 4, on which the packaging blanks, normally glued or welded on one long side, are pushed over the arms 4 and made available for milling. The milling point is marked by means of an anvil 5, which is fastened in each arm 4.

Zur eigentlichen Anfräsvorrichtung 1 gehört ein Gestell 7. Eine Präzisionsspindel 9 mit einer Spannzange 10 dient der Aufnahme eines Hartmetallfräsers 11, welcher in der Fräslage genau koaxial zum Amboss 5 angeordnet ist. Die Präzisionsspindel 9 ist über eine Halterung 13 mit einer Vorschubeinrichtung 14 verbunden, während die Halterung 13 selbst über eine Grundplatte 15 mit einem später erläuterten Tragwerk verbunden ist. An beiden Enden der Grundplatte 15 sind Konsolen 16 und 17 zur Halterung einer Kolbenstange 18 vorgesehen. Zwei Zylinder 19 und 20, über eine Verbindungspfatte 23 und einen Mitnehmerkeil 24 mit der Halterung 13 verbunden, ermöglichen ein gesteuertes Hin- und Herschieben der Präzisionsspindel 9 und damit des Hartmetallfräsers 11. Zur Grobhubbegrenzung dient eine Hubverstellschraube 22, welche in der Konsole 17, wie Fig. 5 zeigt, drehverschiebbar befestigt ist. Das feste Verbinden zwischen der Präzisionsspindel 9 und der Halterung 13 erfolgt mittels einer Schraube 25. Der ganze Bewegungsteil mit dem Hartmetallfräser 11 ist über die Grundplatte 15 mit einer verschiebbaren Tragplatte 26 eines festen Tragwerkes 27 verbunden.A frame 7 belongs to the actual milling device 1. A precision spindle 9 with a collet 10 serves to accommodate a hard metal milling cutter 11, which is arranged exactly coaxially with the anvil 5 in the milling position. The precision spindle 9 is connected to a feed device 14 via a holder 13, while the holder 13 itself is connected via a base plate 15 to a supporting structure explained later. Brackets 16 and 17 for holding a piston rod 18 are provided at both ends of the base plate 15. Two cylinders 19 and 20, connected to the holder 13 via a connecting plate 23 and a driving wedge 24, enable the precision spindle 9 and thus the carbide milling cutter 11 to be moved back and forth in a controlled manner. A stroke adjustment screw 22, which is located in the bracket 17, as in FIG Fig. 5 shows is rotatably mounted. The fixed connection between the precision spindle 9 and the holder 13 takes place by means of a screw 25. The entire moving part with the hard metal milling cutter 11 is connected via the base plate 15 to a displaceable support plate 26 of a fixed support structure 27.

Der Aufbau des beweglichen Frästeiles ist aus Fig. 5 ersichtlich. Eine Druckplatte 30 mit einem vorderen Haltekopf 31 ist in Achsialrichtung, d.h. der Vorschubrichtung des Hartmetallfräsers 11, über zwei O-Ringe 33 und 34 mit einem vorderen Spindelgehäuse 32 gummielastisch verbunden. Es wäre auch möglich, andere federelastische Elemente, beispielsweise Blattfedern o. dgl., vorzusehen. Die Druckplatte 30 und das vordere Spindel - gehäuse 32 weisen sich gegenüberliegende Messbezugsebenen 35 und 36 auf, deren Abstand im Ruhezustand der Vorrichtung die Frästiefe bzw. den auszuführenden Arbeitshub für den Metallfräser 11 festlegen. Der Haltekopf 31 ist mit einer Bohrung 38 versehen, durch welche mittels Druck- oder Saugluft die Frässtelle von Frässpänen reingehalten werden kann. Die Druckplatte 30 ist mittels Führungs-Schraubstiften 39, welche im vorderen Spindelgehäuse 32 eingeschraubt sind, passgenau geführt, so dass die beiden O-Ringe 33 und 34 nur die federelastischen Verbindungselemente sind, aber ohne Führungsfunktion zwischen Druckplatte 30 und Spindelgehäuse 32.The structure of the movable milled part is shown in Fig. 5. A pressure plate 30 with a front holding head 31 is elastically connected to a front spindle housing 32 via two O-rings 33 and 34 in the axial direction, ie the feed direction of the hard metal milling cutter 11. It would also be possible to provide other spring-elastic elements, for example leaf springs or the like. The pressure plate 30 and the front spindle housing 32 have opposing measurement reference planes 35 and 36, the spacing of which, in the idle state of the device, determines the milling depth or the working stroke to be carried out for the metal milling cutter 11. The holding head 31 is provided with a bore 38 through which the milling point of milling chips can be kept clean by means of compressed or suction air. The pressure plate 30 is by means of guide screw pins 39, which are screwed into the front spindle housing 32, are guided so that the two O-rings 33 and 34 are only the spring-elastic connecting elements, but without a guiding function between the pressure plate 30 and the spindle housing 32.

Zwischen der Halterung 13 und der Präzisionsspindel 9 ist zwecks Feineinstellung ein Mikrometer-Zwischenring 42 angeordnet, welcher aus einem vorderen Einzelring 43, einem hinteren Einzelring 44 und einem Drehring 45 besteht. Aufgrund des allen Ringen gemeinsamen Mikrometergewindes 48 kann durch Drehen des Drehringes 45 der Ringspalt zwischen den beiden Einzelringen 43 und 44 auf einen hundertstel Millimeter genau eingestellt werden, was ein ganz genaues Tiefenmass für die auszufräsende Stelle ergibt.Between the holder 13 and the precision spindle 9, a micrometer intermediate ring 42 is arranged for the purpose of fine adjustment, which consists of a front single ring 43, a rear single ring 44 and a rotating ring 45. Due to the micrometer thread 48 common to all rings, the ring gap between the two individual rings 43 and 44 can be adjusted to a hundredth of a millimeter by turning the rotating ring 45, which results in a very precise depth dimension for the point to be milled.

Das Einstellen des Vorschubes des Hartmetallfräsers 11 zum Fräsen der Solldurchstichstelle im Verpackungszuschnitt gemäss Fig. 1 erfolgt derart, dass die stirnseitigen Arbeitskanten des Fräsers 11 mit der vorderen Aufliegefläche des Haltekopfes 31 bündig eingestellt werden. Hierauf wird durch Drehen des Drehringes 45 auf dessen Skala, bei z.B. am entsprechenden Amboss 5 aufliegendem Haltekopf 31, der Abstand der beiden Messbezugsebenen 35 und 36 festgelegt, womit die Anfräsvorrichtung 1 grundsätzlich betriebsbereit ist.The feed of the hard metal milling cutter 11 for milling the desired puncture point in the packaging blank according to FIG. 1 is adjusted in such a way that the front working edges of the milling cutter 11 are set flush with the front bearing surface of the holding head 31. Then turn the rotary ring 45 on its scale, e.g. the distance between the two measurement reference planes 35 and 36 is fixed on the corresponding anvil 5 holding head 31, whereby the milling device 1 is basically ready for operation.

Eine Grobeinstellung erfolgt durch Lösen der Schraube 25 und Verschieben der Präzisionsspindel 9 in der Halterung 13 sowie anschliessendem Festziehen der Schraube 25.A rough adjustment is made by loosening the screw 25 and moving the precision spindle 9 in the holder 13 and then tightening the screw 25.

Der Antrieb, d.h. Vor- und Rückschub des Hartmetallfräsers 11 erfolgt mittels des Kolben/Zylinderaggregates 18, 19, 20, indem die Zylinder 19 und 20 entsprechend mit einem Druckmedium in flüssigem oder gasförmigem Zustand gespiesen werden. Die Steuerung derartiger Kolben/Zylinderaggregate ist bekannt und wird in der Folge, da sie nicht Teil der Erfindung bildet, nicht erläutert.The drive, i.e. Advancement and retraction of the carbide milling cutter 11 takes place by means of the piston / cylinder unit 18, 19, 20, in that the cylinders 19 and 20 are supplied with a pressure medium in a liquid or gaseous state. The control of such piston / cylinder units is known and is not explained in the following, since it does not form part of the invention.

Der eigentliche Fräsvorgang erfolgt derart, dass, wie Fig. 3 zeigt, ein dem Querschnitt eines Sternes 4 entsprechender Verpackungszuschnitt, welcher längs einer Seite geklebt ist, in Fig. 1 mit 50 bezeichnet, aus der Anlieferstation auf den Arm 4 aufgeschoben ist. Durch Drehen des Drehsternes 3 gelangt der Verpackungszuschnitt 50 (Fig. 4) in die Fräsvorrichtung 1, derart, dass der Hartmetallfräser 11 genau koaxial mit dem Amboss 5 liegt. Durch Betätigen der Bewegungsvorrichtung, d.h. des Kolben/Zylinderaggregates 18, 19, 20, wird der über die Präzisionsspindel 9 drehgetriebene Hartmetallfräser 11 in die Verpackungswand eindringen, wobei die vordere Fläche des Haltekopfes 31 diese Verpackungswand fest auf den Arm 4 bzw. den Amboss 5 presst. Nun wird der Hartmetallfräser 11 entgegen der Federkraft der 0-Ringe 33, 34 bezüglich des Haltekopfes 31 nach vorn in die Verpackungsmaterialwand gestossen. Der Fräser 11 dringt dabei so tief in die Wand ein, bis die beiden Messbezugsebenen 35 und 36 aufeinanderliegen. Dann ist die gewollte Frästiefe erreicht und eine Fräsausnehmung 51, beispielsweise von halber Wanddicke, erreicht. Hierauf erfolgt eine Umsteuerung, natürlich alles automatisch, und der Hartmetallfräser 11 wird in seine Ausgangslage zurückgezogen bzw. -geschoben. Auf diese Weise ist im geklebten Zuschnitt die Fräsausnehmung 51 und mithin der Durchstechbereich für einen Saughalm, wie eine Saughalmdarstellung 51 zeigt, bezeichnet. Diese Stelle liegt in einem farbmarkierten Umkreis 53, um sie unverzüglich erkennbar zu machen.The actual milling process takes place in such a way that, as shown in FIG. 3, a packaging blank that corresponds to the cross section of a star 4 and is glued along one side, labeled 50 in FIG. 1, is pushed onto the arm 4 from the delivery station. By turning the rotary star 3, the packaging blank 50 (FIG. 4) gets into the milling device 1 in such a way that the hard metal milling cutter 11 lies exactly coaxially with the anvil 5. By actuating the movement device, i.e. of the piston / cylinder unit 18, 19, 20, the hard metal milling cutter 11, which is driven by the precision spindle 9, will penetrate into the packaging wall, the front surface of the holding head 31 pressing this packaging wall firmly onto the arm 4 or the anvil 5. Now the hard metal milling cutter 11 is pushed against the spring force of the 0-rings 33, 34 forwards with respect to the holding head 31 into the packaging material wall. The milling cutter 11 penetrates deep into the wall until the two measurement reference planes 35 and 36 lie one on top of the other. Then the desired milling depth is reached and a milling recess 51, for example half the wall thickness, is reached. This is reversed, of course everything is automatic, and the hard metal cutter 11 is retracted or pushed into its starting position. In this way, the cutout 51 and thus the piercing area for a suction straw, as shown by a suction straw representation 51, are designated in the glued blank. This location lies in a color-marked radius 53 in order to make it immediately recognizable.

In Fig. 2 ist ein Ausschnitt mit der gefrästen Stelle schematisch dargestellt. Es handelt sich um einen Karton 55, welcher eine äussere Schutzschicht 56 sowie eine innere Schutzschicht 57, gefolgt von einer Alufolie 58 und einer zweiten inneren Schutzschicht 59, aufweist. Die Ausfräsung 61 wird beispielsweise eine Tiefe aufweisen, die der halben totalen Schichtdicke der Verpakkungswand an dieser Stelle entspricht. Die Tiefe richtet sich nach dem Halmmaterial und dem Widerstand des Kartons 55 sowie den inneren drei Schichten 57, 58 und 59. Sie kann, wie erläutert, leicht eingestellt werden.In Fig. 2 a section with the milled point is shown schematically. It is a cardboard 55 which has an outer protective layer 56 and an inner protective layer 57, followed by an aluminum foil 58 and a second inner protective layer 59. The cutout 61 will have a depth, for example, which corresponds to half the total layer thickness of the packaging wall at this point. The depth depends on the straw material and the resistance of the carton 55 as well as the inner three layers 57, 58 and 59. As explained, it can be easily adjusted.

Die Präzisionsspindel 9 bzw. der Hartmetallfräser 11 kann mittels Druckluft gespiesen werden, wobei seine Drehzahl in sehr weitem Bereich den Verhältnissen anpassbar ist. Der Mikrometer-Zwischenring 52 ist vorzugsweise so kalibriert, dass einer vollen Drehung des Drehringes 45 eine Steigung von einem mm entspricht.The precision spindle 9 or the hard metal milling cutter 11 can be fed by means of compressed air, its speed being adaptable to the conditions in a very wide range. The micrometer intermediate ring 52 is preferably calibrated so that a full rotation of the rotary ring 45 corresponds to a pitch of one mm.

Die Ambosse 5 können beispielsweise in entsprechende Ausnehmungen der Arme 4 des Drehsternes 3 eingeschraubt werden, derart, dass sie mit der umgebenden Sternarmebene bündig sind.The anvils 5 can, for example, be screwed into corresponding recesses in the arms 4 of the rotary star 3 in such a way that they are flush with the surrounding star arm plane.

Die dargelegte Vorrichtung erlaubt ein leichtes Auswechseln aller Teile, insbesondere des Fräsers.The device described allows easy replacement of all parts, especially the milling cutter.

Claims (8)

1. Process for producing a discontinuous recess (51 ), intended to be pierced by a suction tube (52), in a tubular, longitudinally glued or welded packing blank (50) in sheet-lined board for receptacles carrying liquids, characterised in that the blank (50) is supported (5) inflexibly at the intended point in the interior of the tube and then the recess is cut out of the supported point in the blank wall as a solid cylinder.
2. Process, preferably according to at least one of the claims, characterised in that a cut is made approximately into the centre of the wall, e.g. 0.2 mm for a wall thickness of 0.4 mm.
3. Process, preferably according to at least one of the claims, characterised in that the cutting shavings are removed during cutting, e.g. by means of suction and/or compressed air.
4. Device for producing a discontinuous recess (51), intended to be pierced by a suction tube (52), in a packing blank (50) in sheet-lined board for receptacles carrying liquids, with a motor- driven spindle, the feed travel of which can be adjusted by means of a fine adjustment device and which spindle holds the working tool, characterised in that a holding head (31) for pressing the point in the wall to be worked on to an inflexible base (5) is provided and the tool is formed as a cutting tool (11), the spindle (9) being connected elastically (33, 34) to the holding head (31).
5. Device, preferably according to at least one of the claims, characterised in that the connection comprises elastic rubber means, e.g. at least one 0-ring (33, 34).
6. Device, preferably according to at least one of the claims, characterised in that the connection comprises slideways (39).
7. Device, preferably according to at least one of the claims, characterised in that in the disengaged state at rest a measuring reference surface (35) of a pressure plate (30) lies opposite a measuring reference surface (36) of a part of the spindle, e.g. the spindle housing (32), the distance at rest of these two surfaces (35, 36) being a measurement for the depth of cut to be made in cutting the wall, preferably being equal to the depth of cut.
8. Device, preferably according to at least one of the claims, characterised in that an element (42) is provided to adjustthe depth of cut, preferably an axially expandable three-part ring (43-45), which consists of three coaxial individual rings screwed together longitudinally.
EP85104124A 1985-04-04 1985-04-04 Method and device for creating on a package blank a spot to be pierced by a straw Expired EP0199830B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT85104124T ATE33235T1 (en) 1985-04-04 1985-04-04 METHOD AND DEVICE FOR MANUFACTURING A POINT OF A PACKAGING BLANK INTENDED FOR PIERCING BY MEANS OF A SUCTION TUBE.
DE8585104124T DE3562006D1 (en) 1985-04-04 1985-04-04 Method and device for creating on a package blank a spot to be pierced by a straw
EP85104124A EP0199830B1 (en) 1985-04-04 1985-04-04 Method and device for creating on a package blank a spot to be pierced by a straw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85104124A EP0199830B1 (en) 1985-04-04 1985-04-04 Method and device for creating on a package blank a spot to be pierced by a straw

Publications (2)

Publication Number Publication Date
EP0199830A1 EP0199830A1 (en) 1986-11-05
EP0199830B1 true EP0199830B1 (en) 1988-03-30

Family

ID=8193428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85104124A Expired EP0199830B1 (en) 1985-04-04 1985-04-04 Method and device for creating on a package blank a spot to be pierced by a straw

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Country Link
EP (1) EP0199830B1 (en)
AT (1) ATE33235T1 (en)
DE (1) DE3562006D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE520431C2 (en) * 1999-09-22 2003-07-08 Tetra Laval Holdings & Finance Ways to prepare a packaging container provided with an opening device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB483432A (en) * 1937-04-21 1938-04-20 Pneumatic Scale Corp Improvements relating to machines for making cartons
GB670982A (en) * 1949-04-12 1952-04-30 Philip George Allen Improvements in or relating to liquid containers
CH275038A (en) * 1949-07-20 1951-04-30 Berrini Jean For single use of certain containers containing a liquid.
GB861079A (en) * 1958-01-31 1961-02-15 Hermorion Ltd Improvements in and relating to closed tetrahedron packages
DE2238822A1 (en) * 1972-08-07 1974-02-14 Hilti Ag CLEANING DEVICE FOR METAL SURFACES
US4158987A (en) * 1976-11-15 1979-06-26 Excellon Industries Pressure foot for machine tool
DE3119602A1 (en) * 1981-05-16 1982-12-02 Altstädter Verpackungs-Vertriebsgesellschaft mbH, 6102 Pfungstadt DEVICE FOR PUNCHING A HOLE IN A PAPER RAIL
US4515505A (en) * 1982-10-28 1985-05-07 International Business Machines Corporation Pressure foot assembly for an end mill delete cutter

Also Published As

Publication number Publication date
ATE33235T1 (en) 1988-04-15
EP0199830A1 (en) 1986-11-05
DE3562006D1 (en) 1988-05-05

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