EP0426188A1 - Method and device for making hinges in flat cardboard material - Google Patents

Method and device for making hinges in flat cardboard material Download PDF

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Publication number
EP0426188A1
EP0426188A1 EP90120988A EP90120988A EP0426188A1 EP 0426188 A1 EP0426188 A1 EP 0426188A1 EP 90120988 A EP90120988 A EP 90120988A EP 90120988 A EP90120988 A EP 90120988A EP 0426188 A1 EP0426188 A1 EP 0426188A1
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EP
European Patent Office
Prior art keywords
flat material
bending
edge
compression
clamping
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Granted
Application number
EP90120988A
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German (de)
French (fr)
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EP0426188B1 (en
Inventor
Gerhard Sixt
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LOUIS LEITZ KG
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Louis Leitz KG
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    • 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
    • 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
    • B31B50/252—Surface scoring using presses or dies

Definitions

  • the invention relates to a method and a device for producing hinge hinges on the one side and bulge-shaped on the other side in flat material from cardboard optionally covered with plastic film, paper, textile tape and / or leather.
  • Articulated hinges of this type are required above all on folder covers, book covers, cardboard boxes with hinged cover closures and the like.
  • the cardboard used for the production of the flat material consists of several paper layers which are connected to one another in a combined fiber and adhesive bond and which can be finished on their surface with a plastic, paper, textile and / or leather lamination.
  • the flat material is compressed on the groove side by an upset edge that dips into the flat material and at the same time is folded to form the groove, and on the bead side on two sides at the same distance on both sides of the upset edge, one bending edge parallel to the upset edge in the opposite direction to the fold is deformed to form outer bead edges, the mutual distance between the bending edges being reduced during the immersion of the compression edge.
  • that which protrudes laterally beyond the upsetting edge becomes Flat material is pressed by the bending edges which can be displaced relative to the upsetting edge against abutment surfaces arranged laterally next to the upsetting edge.
  • the abutment surfaces are aligned obliquely to one another, including an obtuse angle, and serve as inclined planes on which the bending edges are displaced in the course of the displacement movement while reducing their mutual distance from the compression edge.
  • the flat material gripped by the sharp bending edges is displaced relative to the abutment surfaces while overcoming a frictional force.
  • surface overstretching, surface damage and tension within the flat material can occur.
  • the internal tensions in turn have an influence on the restoring force in the area of the hinge, which can lead to an undesired automatic opening in the hinge area, for example to the automatic opening of folder covers.
  • the object of the invention is to develop a method and a device of the type specified at the outset, with which a smooth-running hinge with only low restoring forces is generated, surface damage in the hinge area is avoided and a disruptive folding up of the protruding flat material parts during the upsetting process can be prevented.
  • the solution according to the invention is based on the idea that a sliding movement between the flat material and the pressing tools must be avoided during the upsetting process in order to ensure tension-free loosening of the fiber composite and non-destructive surface handling in the hinge area.
  • this is achieved in that the flat material parts projecting beyond the outer edges of the bead are clamped independently of one another at clamping points arranged in the vicinity of the adjacent bending edges and are moved toward one another in an aligned alignment when the upsetting edge is immersed in the flat material.
  • This procedure has the additional advantage that the protruding flat material parts do not have to be pivoted against one another in the course of the upsetting process.
  • the clamping points coincide with the bending edge at the beginning of the immersion process and become free of sliding friction in the course of the reduction in the distance between the bending edges moved outwards on the flat material parts protruding over the bead outer edges.
  • the distance between the clamping points can remain approximately the same while the distance between the bending edges is reduced.
  • the clamping points are formed by the contact lines in each case of two spherical, for example partially cylindrical, clamping surfaces rolling off one another with intermediate clamping of the flat material.
  • the flat material is clamped flat over a certain width due to its flexibility at the clamping points.
  • the change in distance between the bending edges is positively controlled as a function of their relative displacement position to the compression edge. This makes it possible to optimize the sequence of movements of the bending edges relative to the upsetting edge so that the carton is drawn in largely without tension during the upsetting process.
  • a preferred device for carrying out the method according to the invention has two tools which act from opposite sides against the flat material and are displaceable relative to one another, preferably designed as upper and lower tools.
  • the first of these tools contains a centrally arranged elongated compression tongue which forms a compression and fold edge and two contact surfaces arranged next to the compression tongue for those to be produced Hinged hinges protruding flat material parts laterally.
  • the second tool is provided with two elongated bending jaws which are offset on both sides with respect to the compression tongue and which each have a bending edge which is parallel to the compression and folding edge and which can be moved towards one another in the course of the relative displacement movement of the tools in the direction of the compression tongue.
  • the solution according to the invention in such a device is that the bending jaws of the second tool are provided with clamping surfaces which can be pressed against the contact surfaces of the first molding tool in an aligned alignment with the intermediate clamps of the protruding flat material parts, and that the parts carrying the clamping and contact surfaces can be coupled in pairs to carry out a synchronous transverse movement.
  • the contact surfaces of the first tool are arranged on thrust pieces which, under the action of the bending jaws with their clamping surfaces, can be displaced relative to the compression tongue against the force of a spring.
  • the contact and clamping surfaces are arranged in the area of their clamping points which bear against the protruding flat material parts in a common, preferably horizontally oriented tangent plane.
  • the bending jaws and the pressure pieces are pivot axes parallel to the upsetting and bending edges hinged to the respective tools.
  • the pressure pieces can be articulated on a spring base that is displaceable relative to the compression tongue against the force of a spring.
  • the bending jaws and / or the pressure pieces which can be coupled with these can be pivoted in pairs against one another about their pivot axes against the force of a spring, each defining the opening width of the bending edges when they strike the flat material, preferably adjustable.
  • the contact and clamping surfaces can have a spherical, preferably partially cylindrical, pair-wise rolling shape.
  • the pivot axes of the bending jaws and pressure pieces pressed against one another in pairs with respect to the compression tongue are arranged outside the clamping points of their clamping and contact surfaces lying against one another with intermediate clamping of the flat material, then the bending jaws and pressure pieces are pressed in the course of the compression process a torque directed towards the upset around their swivel axes, by which the desired transverse movement is triggered.
  • the bending jaws are positively guided to the side of the compression tongue along a curve that defines the transverse movement as a function of the displacement path.
  • the bending jaws can be articulated on a plunger forming the upper tool, while the curve is arranged in a fixed manner with respect to the plunger.
  • the upsetting device shown in the drawing is intended for the production of hinge hinges 10 in flat material 12, which are groove-shaped on one side, from cardboard optionally laminated with plastic, paper, textile tape or leather.
  • the upsetting device essentially comprises a lower tool 18 provided with a machine-fixed, elongated compression tongue 14 and two elongated pressure pieces 16 arranged laterally next to the compression tongue 14, and an upper tool 22 arranged above the lower tool 18 and displaceable against the lower tool and provided with downward-pointing bending jaws 20.
  • the pressure pieces 16 are articulated on a spring base 28 which can be pressed against the force of springs 24 relative to the machine frame 26 and the compression tongue 14 under the action of the descending upper tool 22, about axes 30 parallel to the longitudinal extension of the compression tongue 14.
  • a pressure spring 32 acts between the pressure pieces 16 and holds the pressure pieces outward against adjustable stops 34 in the open position.
  • the bending jaws 20 are arranged on an up and down movable plunger 36 so as to be pivotable about axes 38 parallel to the axes 30. In their open position shown in FIG. 1, they are held against adjustable stops 42 under the action of a compression spring 40. The stops 42 define the opening width of the bending jaws 20 when their bending edges 44 strike the flat material 12 lying on the lower tool 18 in the region of the contact surfaces 46 and the compression edge 48 at the beginning of the upsetting process.
  • the bending jaws 20 and the pressure pieces 16 become locked by means of schematically illustrated locking members 50 in pairs so that they perform a sliding friction-free coupled transverse movement about their axes 30, 38 with sandwiched flat material 12.
  • the clamping surface 52 of the bending jaws 20 pressing against the upper side of the flat material 12 and the contact surfaces 46 of the pressure pieces 16 pressing against the underside of the flat material 12 are spherical, preferably partially cylindrical.
  • the pressure pieces are moved downward by clamping the flat material 12 by moving the spring base 28 against the force of the springs 24 such that the compression tongue 14 with its compression edge 48 dips into the sheet material 12 from below to form grooves.
  • the one available for grooving Material is limited by the opening dimension between the bending edges 44 of the bending jaws 20 when it hits the flat material 12.
  • the flat material parts 12 'protruding laterally beyond the bending edges 44 are held in a horizontal orientation between the clamping and contact surfaces 52, 46, which lie against one another in pairs.

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Abstract

The invention relates to a method for making hinges in flat cardboard material, which on one side are groove-shaped and on the other side are bead-shaped, for example for file covers, book bindings and cardboard boxes with folding tops and the like. The flat material is compressed on the groove side by a compression edge (14), which plunges into the flat material, and at the same time folded, forming the groove, and on the bead side deformed by bending at two places at the same distance on both sides of the compression edge about in each case a bending edge parallel to the compression edge, in the opposite direction to the folding, forming bead outer edges. During the plunging of the compression edge into the flat material, the mutual distance between the bending edges is reduced. In order to obtain an easy-running hinge with only low restoring forces and to avoid surface damage in the compression process, it is proposed according to the invention that the flat material parts projecting beyond the bead outer edges are clamped independently of one another at clamping points (46, 52) close to the neighbouring bending edges and, during plunging of the compression edge into the flat material, are moved towards one another in mutual alignment.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Erzeugung von auf der einen Seite rillenförmigen und auf der anderen Seite wulstförmigen Gelenkscharnieren in Flachmaterial aus gegebenenfalls mit Kunststoffolie, Papier, Textilband und/oder Leder überzogenem Karton.The invention relates to a method and a device for producing hinge hinges on the one side and bulge-shaped on the other side in flat material from cardboard optionally covered with plastic film, paper, textile tape and / or leather.

Gelenkscharniere dieser Art werden vor allem an Ordnerdeckeln,Bucheinbänden, Kartonschachteln mit Klappdeckelverschlüssen und dergleichen benötigt. Der für die Herstellung des Flachmaterials verwendete Karton besteht aus mehreren, in einem kombinierten Faser- und Klebeverbund miteinander verbundenen Papierlagen, die an ihrer Oberfläche mit einer Kunststoff-, Papier-, Textil-und/oder Lederkaschierung veredelt werden können. Zur Erzeugung der Gelenkscharniere ist es bekannt, daß das Flachmaterial rillenseitig durch eine in das Flachmaterial eintauchende Stauchkante gestaucht und zugleich unter Bildung der Rille gefalzt wird und wulstseitig an zwei in gleichem Abstand beidseitig der Stauchkante um je eine zur Stauchkante parallele Biegekante in zur Falzung entgegengesetzter Richtung unter Bildung von Wulstaußenkanten biegeverformt wird, wobei während des Eintauchens der Stauchkante der gegenseitige Abstand zwischen den Biegekanten verkleinert wird. Im Verlauf des kombinierten Stauch-, Falz- und Biegevorgangs wird das seitlich über die Stauchkante überstehende Flachmaterial durch die relativ zur Stauchkante verschiebbaren Biegekanten gegen seitlich neben der Stauchkante angeordnete Widerlagerflächen gepreßt. Die Widerlagerflächen sind dort unter Einschluß eines stumpfen Winkels schräg zueinander ausgerichtet und dienen als schiefe Ebenen, auf denen die Biegekanten im Zuge der Verschiebebewegung unter Verkleinerung ihres gegenseitigen Abstandes zur Stauchkante hin verschoben werden. Dabei wird das durch die spitzen Biegekanten erfaßte Flachmaterial relativ zu den Widerlagerflächen unter Überwindung einer Reibungskraft verschoben. Je nach Materialzusammensetzung des Flachmaterials kann es dabei zu Oberflächenüberdehnungen, Oberflächenverletzungen und zu Verspannungen innerhalb des Flachmaterials kommen. Die inneren Verspannungen haben wiederum einen Einfluß auf die Rückstellkraft im Bereich des Gelenkscharniers, die zu einem unerwünschten selbsttätigen Öffnen im Scharnierbereich, beispielsweise zum selbsttätigen Aufklaffen von Ordnerdeckeln, führen kann. Weiter wird bei dem bekannten Verfahren als nachteilig empfunden, daß die über den Scharnierbereich überstehenden Flachmaterialteile wegen der schräg gegeneinander angestellten Widerlagerflächen im Verlauf des Falz- und Biegevorgangs von einer ebenen Strecklage aus in eine Winkellage gegeneinander verschwenkt werden, die beim anschließenden Weitertransport wieder rückgängig gemacht werden muß. Für diesen Schwenkvorgang sind zusätzliche maschinelle Hilfsmittel, wie hin- und hergehende Anschlag- und Niederhaltestempel erforderlich, die im Hinblick auf die hierbei zu bewegenden Massen taktzeitbegrenzend wirken können.Articulated hinges of this type are required above all on folder covers, book covers, cardboard boxes with hinged cover closures and the like. The cardboard used for the production of the flat material consists of several paper layers which are connected to one another in a combined fiber and adhesive bond and which can be finished on their surface with a plastic, paper, textile and / or leather lamination. To produce the articulated hinges, it is known that the flat material is compressed on the groove side by an upset edge that dips into the flat material and at the same time is folded to form the groove, and on the bead side on two sides at the same distance on both sides of the upset edge, one bending edge parallel to the upset edge in the opposite direction to the fold is deformed to form outer bead edges, the mutual distance between the bending edges being reduced during the immersion of the compression edge. In the course of the combined upsetting, folding and bending process, that which protrudes laterally beyond the upsetting edge becomes Flat material is pressed by the bending edges which can be displaced relative to the upsetting edge against abutment surfaces arranged laterally next to the upsetting edge. The abutment surfaces are aligned obliquely to one another, including an obtuse angle, and serve as inclined planes on which the bending edges are displaced in the course of the displacement movement while reducing their mutual distance from the compression edge. The flat material gripped by the sharp bending edges is displaced relative to the abutment surfaces while overcoming a frictional force. Depending on the material composition of the flat material, surface overstretching, surface damage and tension within the flat material can occur. The internal tensions in turn have an influence on the restoring force in the area of the hinge, which can lead to an undesired automatic opening in the hinge area, for example to the automatic opening of folder covers. Furthermore, it is perceived as a disadvantage in the known method that the flat material parts protruding over the hinge area are pivoted against one another in the course of the folding and bending process from a flat stretching position into an angular position due to the obliquely positioned abutment surfaces, which are reversed again during the subsequent further transport got to. For this swiveling process, additional mechanical aids, such as to and fro stop and hold-down stamps, are required, which can limit the cycle time with regard to the masses to be moved.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs angegebenen Art zu entwickeln, womit ein leichtgängiges Scharnier mit nur geringen Rückstellkräften erzeugt, Oberflächenbeschädigungen im Scharnierbereich vermieden und ein störendes Hochklappen der überstehenden Flachmaterialteile während des Stauchvorgangs verhindert werden können.Proceeding from this, the object of the invention is to develop a method and a device of the type specified at the outset, with which a smooth-running hinge with only low restoring forces is generated, surface damage in the hinge area is avoided and a disruptive folding up of the protruding flat material parts during the upsetting process can be prevented.

Die erfindungsgemäße Lösung geht von dem Gedanken aus, daß während des Stauchvorgangs eine Gleitbewegung zwischen dem Flachmaterial und den andrückenden Werkzeugen vermieden werden muß, um eine spannungsfreie Auflockerung des Faserverbunds und eine zerstörungsfreie Oberflächenhandhabung im Scharnierbereich zu gewährleisten. Gemäß der Erfindung wird dies dadurch erreicht, daß die über die Wulstaußenkanten überstehenden Flachmaterialteile unabhängig voneinander an in der Nähe der benachbarten Biegekanten angeordneten Klemmstellen eingespannt und beim Eintauchen der Stauchkante in das Flachmaterial in miteinander fluchtender Ausrichtung aufeinanderzu bewegt werden. Diese Verfahrensweise hat zusätzlich den Vorteil, daß die überstehenden Flachmaterialteile im Verlauf des Stauchvorgangs nicht gegeneinander verschwenkt werden müssen.The solution according to the invention is based on the idea that a sliding movement between the flat material and the pressing tools must be avoided during the upsetting process in order to ensure tension-free loosening of the fiber composite and non-destructive surface handling in the hinge area. According to the invention, this is achieved in that the flat material parts projecting beyond the outer edges of the bead are clamped independently of one another at clamping points arranged in the vicinity of the adjacent bending edges and are moved toward one another in an aligned alignment when the upsetting edge is immersed in the flat material. This procedure has the additional advantage that the protruding flat material parts do not have to be pivoted against one another in the course of the upsetting process.

Nach einer bevorzugten Ausgestaltung der Erfindung fallen die Klemmstellen zu Beginn des Eintauchvorgangs mit der Biegekante zusammen und werden im Verlauf der Abstandsverkleinerung zwischen den Biegekanten gleitreibungsfrei auf den über die Wulstaußenkanten überstehenden Flachmaterialteilen nach außen bewegt. Der Abstand zwischen den Klemmstellen kann dabei während der Abstandsverkleinerung der Biegekanten etwa gleich bleiben. Letzteres wird dadurch ermöglicht, daß die Klemmstellen durch die Anlagelinien jeweils zweier unter Zwischenklemmen des Flachmaterials aufeinander abrollender, balliger, beispielsweise teilzylindrischer Klemmflächen gebildet wird. Grundsätzlich wird das Flachmaterial aufgrund seiner Nachgiebigkeit an den Klemmstellen über eine gewisse Breite flächig eingespannt.According to a preferred embodiment of the invention, the clamping points coincide with the bending edge at the beginning of the immersion process and become free of sliding friction in the course of the reduction in the distance between the bending edges moved outwards on the flat material parts protruding over the bead outer edges. The distance between the clamping points can remain approximately the same while the distance between the bending edges is reduced. The latter is made possible by the fact that the clamping points are formed by the contact lines in each case of two spherical, for example partially cylindrical, clamping surfaces rolling off one another with intermediate clamping of the flat material. Basically, the flat material is clamped flat over a certain width due to its flexibility at the clamping points.

Gemäß einer weiteren bevorzugten Ausgestaltung der Erfindung wird die Abstandsveränderung zwischen den Biegekanten in Abhängigkeit von ihrer relativen Verschiebelage zur Stauchkante zwangsgesteuert. Dadurch ist es möglich, den Bewegungsablauf der Biegekanten relativ zur Stauchkante so zu optimieren, daß der Kartoneinzug während des Stauchvorgangs weitgehend spannungsfrei erfolgt.According to a further preferred embodiment of the invention, the change in distance between the bending edges is positively controlled as a function of their relative displacement position to the compression edge. This makes it possible to optimize the sequence of movements of the bending edges relative to the upsetting edge so that the carton is drawn in largely without tension during the upsetting process.

Eine bevorzugte Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens weist zwei von einander gegenüberliegenden Seiten gegen das Flachmaterial einwirkende, relativ zueinander verschiebbare, vorzugsweise als Ober- und Unterwerkzeuge ausgebildete Werkzeuge auf. Das erste dieser Werkzeuge enthält eine mittig angeordnete langgestreckte, eine Stauch- und Falzkante bildende Stauchzunge sowie zwei neben der Stauchzunge angeordnete Anlageflächen für die an den zu erzeugenden Gelenkscharnieren seitlich überstehenden Flachmaterialteile. Das zweite Werkzeug ist mit zwei gegenüber der Stauchzunge beidseitig versetzt angeordneten, jeweils eine zur Stauch- und Falzkante parallele Biegekante aufweisenden, langgestreckten Biegebacken versehen, die im Verlauf der relativen Verschiebebewegung der Werkzeuge in Richtung Stauchzunge aufeinanderzu bewegbar sind. Die erfindungsgemäße Lösung besteht bei einer solchen Vorrichtung darin, daß die Biegebacken des zweiten Werkzeugs mit Klemmflächen versehen sind, die unter Zwischenklemmen der überstehenden Flachmaterialteile in miteinander fluchtender Ausrichtung gegen die Anlageflächen des ersten Formwerkzeugs anpreßbar sind, und daß die die Klemm- und Anlageflächen tragenden Teile zur Ausführung einer synchronen Querbewegung paarweise miteinander kuppelbar sind.A preferred device for carrying out the method according to the invention has two tools which act from opposite sides against the flat material and are displaceable relative to one another, preferably designed as upper and lower tools. The first of these tools contains a centrally arranged elongated compression tongue which forms a compression and fold edge and two contact surfaces arranged next to the compression tongue for those to be produced Hinged hinges protruding flat material parts laterally. The second tool is provided with two elongated bending jaws which are offset on both sides with respect to the compression tongue and which each have a bending edge which is parallel to the compression and folding edge and which can be moved towards one another in the course of the relative displacement movement of the tools in the direction of the compression tongue. The solution according to the invention in such a device is that the bending jaws of the second tool are provided with clamping surfaces which can be pressed against the contact surfaces of the first molding tool in an aligned alignment with the intermediate clamps of the protruding flat material parts, and that the parts carrying the clamping and contact surfaces can be coupled in pairs to carry out a synchronous transverse movement.

Gemäß einer bevorzugten Ausgestaltung der erfindungsgemäßen Vorrichtung sind die Anlageflächen des ersten Werkzeugs an Druckstücken angeordnet, die unter der Einwirkung der mit seinen Klemmflächen anschlagenden Biegebacken entgegen der Kraft einer Feder relativ zur Stauchzunge verschiebbar sind. Vorteilhafterweise sind die Anlage- und Klemmflächen im Bereich ihrer gegen die überstehenden Flachmaterialteile anliegenden Klemmstellen in einer gemeinsamen, vorzugsweise horizontal ausgerichteten Tangentenebene angeordnet.According to a preferred embodiment of the device according to the invention, the contact surfaces of the first tool are arranged on thrust pieces which, under the action of the bending jaws with their clamping surfaces, can be displaced relative to the compression tongue against the force of a spring. Advantageously, the contact and clamping surfaces are arranged in the area of their clamping points which bear against the protruding flat material parts in a common, preferably horizontally oriented tangent plane.

Nach einer weiteren bevorzugten Ausgestaltung der Erfindung sind die Biegebacken und die Druckstücke um zu den Stauch- und Biegekanten parallele Schwenkachsen schwenkbar an den jeweiligen Werkzeugen angelenkt. Die Druckstücke können dabei an einem relativ zur Stauchzunge entgegen der Kraft einer Feder verschiebbaren Federboden angelenkt sein. Vorteilhafterweise können die Biegebacken und/oder die mit diesen kuppelbaren Druckstücke zwischen je einem die Öffnungsbreite der Biegekanten beim Auftreffen auf das Flachmaterial definierenden, vorzugsweise einstellbaren Anschlag entgegen der Kraft einer Feder um ihre Schwenkachsen paarweise aufeinanderzu verschwenkt werden. Die Anlage- und Klemmflächen können dabei eine ballige, vorzugsweise teilzylindrische, paarweise aufeinander abrollende Gestalt aufweisen. Wenn gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung die Schwenkachsen der paarweise gegeneinander gepreßten Biegebacken und Druckstücke in bezug auf die Stauchzunge außerhalb der Klemmstellen ihrer unter Zwischenklemmen des Flachmaterials gegeneinander anliegenden Klemm- und Anlageflächen angeordnet sind, so wird im Verlauf des Stauchvorgangs auf die Biegebacken und Druckstücke ein in Richtung Stauchzunge gerichtetes Drehmoment um ihre Schwenk achsen ausgeübt, durch das die gewünschte Querbewegung ausgelöst wird. Um einen spannungsfreien Kartoneinzug im Scharnierbereich zu gewährleisten, sind die Biegebacken zur Seite der Stauchzunge hin entlang einer die Querbewegung in Abhängigkeit vom Verschiebeweg definierenden Kurve zwangsgeführt. Die Biegebacken können dabei an einem das Oberwerkzeug bildenden Stößel angelenkt sein, während die Kurve gegenüber dem Stößel feststehend angeordnet ist.According to a further preferred embodiment of the invention, the bending jaws and the pressure pieces are pivot axes parallel to the upsetting and bending edges hinged to the respective tools. The pressure pieces can be articulated on a spring base that is displaceable relative to the compression tongue against the force of a spring. Advantageously, the bending jaws and / or the pressure pieces which can be coupled with these can be pivoted in pairs against one another about their pivot axes against the force of a spring, each defining the opening width of the bending edges when they strike the flat material, preferably adjustable. The contact and clamping surfaces can have a spherical, preferably partially cylindrical, pair-wise rolling shape. If, according to a further advantageous embodiment of the invention, the pivot axes of the bending jaws and pressure pieces pressed against one another in pairs with respect to the compression tongue are arranged outside the clamping points of their clamping and contact surfaces lying against one another with intermediate clamping of the flat material, then the bending jaws and pressure pieces are pressed in the course of the compression process a torque directed towards the upset around their swivel axes, by which the desired transverse movement is triggered. In order to ensure tension-free carton feeding in the hinge area, the bending jaws are positively guided to the side of the compression tongue along a curve that defines the transverse movement as a function of the displacement path. The bending jaws can be articulated on a plunger forming the upper tool, while the curve is arranged in a fixed manner with respect to the plunger.

Im folgenden wird die Erfindung anhand eines in der Zeichnung in schematischer Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
Einen Schnitt durch eine Stauchvorrichtung im geöffneten Zustand;
Fig. 2
die Stauchvorrichtung nach Fig. 1 im Stauchzustand.
The invention is explained in more detail below with reference to an exemplary embodiment shown in the drawing in a schematic manner. Show it:
Fig. 1
A section through a compression device in the open state;
Fig. 2
1 in the upset state.

Die in der Zeichnung dargestellte Stauchvorrichtung ist zur Erzeugung von auf der einen Seite rillenförmigen Gelenkscharnieren 10 in Flachmaterial 12 aus gegebenenfalls mit Kunststoff, Papier, Textilband oder Leder kaschiertem Karton bestimmt. Die Stauchvorrichtung umfaßt im wesentlichen ein mit einer maschinenfesten, langgestreckten Stauchzunge 14 und zwei seitlich neben der Stauchzunge 14 angeordneten langgestreckten Druckstücken 16 versehenes Unterwerkzeug 18 und ein oberhalb des Unterwerkzeugs 18 angeordnetes gegen das Unterwerkzeug verschiebbares, mit nach unten weisenden Biegebacken 20 versehenes Oberwerkzeug 22.The upsetting device shown in the drawing is intended for the production of hinge hinges 10 in flat material 12, which are groove-shaped on one side, from cardboard optionally laminated with plastic, paper, textile tape or leather. The upsetting device essentially comprises a lower tool 18 provided with a machine-fixed, elongated compression tongue 14 and two elongated pressure pieces 16 arranged laterally next to the compression tongue 14, and an upper tool 22 arranged above the lower tool 18 and displaceable against the lower tool and provided with downward-pointing bending jaws 20.

Die Druckstücke 16 sind an einem entgegen der Kraft von Federn 24 relativ zum Maschinengestell 26 und zur Stauchzunge 14 unter der Einwirkung des niedergehenden Oberwerkzeugs 22 niederdrückbaren Federboden 28 um zur Längserstreckung der Stauchzunge 14 parallele Achsen 30 schwenkbar angelenkt. Zwischen den Druckstücken 16 wirkt eine Druckfeder 32, die die Druckstücke in der Offenstellung nach außen gegen einstellbare Anschläge 34 hält.The pressure pieces 16 are articulated on a spring base 28 which can be pressed against the force of springs 24 relative to the machine frame 26 and the compression tongue 14 under the action of the descending upper tool 22, about axes 30 parallel to the longitudinal extension of the compression tongue 14. A pressure spring 32 acts between the pressure pieces 16 and holds the pressure pieces outward against adjustable stops 34 in the open position.

Die Biegebacken 20 sind an einem auf und ab bewegbaren Stößel 36 um zu den Achsen 30 parallele Achsen 38 schwenkbar angeordnet. In ihrer in Fig. 1 gezeigten Offenstellung werden sie unter der Einwirkung einer Druckfeder 40 gegen einstellbare Anschläge 42 gehalten. Die Anschläge 42 definieren die Öffnungsweite der Biegebacken 20 beim Auftreffen ihrer Biegekanten 44 auf das zu Beginn des Stauchvorgangs auf dem Unterwerkzeug 18 im Bereich der Anlageflächen 46 und der Stauchkante 48 aufliegende Flachmaterial 12. Beim Niedergehen des Stößels 36 werden die Biegebacken 20 und die Druckstücke 16 durch schematisch dargestellte Verriegelungsorgane 50 paarweise so miteinander verriegelt, daß sie bei zwischengeklemmtem Flachmaterial 12 eine gleitreibungsfreie gekoppelte Querbewegung um ihre Achsen 30,38 ausführen. Um ein gegenseitiges Abrollen zu ermöglichen, sind die gegen die Oberseite des Flachmaterials 12 andrückende Klemmfläche 52 der Biegebacken 20 und die gegen die Unterseite des Flachmaterials 12 andrückenden Anlageflächen 46 der Druckstücke 16 ballig, vorzugsweise teilzylindrisch ausgebildet.The bending jaws 20 are arranged on an up and down movable plunger 36 so as to be pivotable about axes 38 parallel to the axes 30. In their open position shown in FIG. 1, they are held against adjustable stops 42 under the action of a compression spring 40. The stops 42 define the opening width of the bending jaws 20 when their bending edges 44 strike the flat material 12 lying on the lower tool 18 in the region of the contact surfaces 46 and the compression edge 48 at the beginning of the upsetting process. When the ram 36 comes down, the bending jaws 20 and the pressure pieces 16 become locked by means of schematically illustrated locking members 50 in pairs so that they perform a sliding friction-free coupled transverse movement about their axes 30, 38 with sandwiched flat material 12. In order to enable mutual rolling, the clamping surface 52 of the bending jaws 20 pressing against the upper side of the flat material 12 and the contact surfaces 46 of the pressure pieces 16 pressing against the underside of the flat material 12 are spherical, preferably partially cylindrical.

Beim Auftreffen des von oben nach unten verschobenen Oberwerkzeugs 22 mit den Biegebacken 20 auf den Druckstücken 16 werden die Druckstücke unter Zwischenklemmen des Flachmaterials 12 durch Verschieben des Federbodens 28 gegen die Kraft der Federn 24 so nach unten verschoben, daß die Stauchzunge 14 mit ihrer Stauchkante 48 von unten her rillenbildend in das Flachmaterial 12 eintaucht. Das für die Rillenbildung zur Verfügung stehende Material wird durch das Öffnungsmaß zwischen den Biegekanten 44 der Biegebacken 20 beim Auftreffen auf das Flachmaterial 12 begrenzt. Die seitlich über die Biegekanten 44 überstehenden Flachmaterialteile 12' werden zwischen den paarweise gegeneinander anliegenden Klemm- und Anlageflächen 52,46 in horizontaler Ausrichtung gehalten. Gleichzeitig werden die Biegebacken und Druckstücke unter der Einwirkung eines beim Niedergehen des Oberwerkzeugs ausgeübten Drehmoments um die Achsen 30,38 unter Ausführung eines kombinierten Falz- und Biegevorgangs im Scharnierbereich 10 entgegen der Kraft der Druckfedern 32,40 gegen die Stauchzunge 14 nach innen bewegt. Dieser Bewegungsablauf wird über maschinenfeste Kurven 54, gegen die die Biegebacken 20 in Richtung Stanzzunge 14 anliegen, mit dem Ziel eines spannungsfreien Kartoneinzugs im Scharnierbereich optimal zwangsgesteuert.When the upper tool 22, which is displaced from top to bottom, and the bending jaws 20 impinges on the pressure pieces 16, the pressure pieces are moved downward by clamping the flat material 12 by moving the spring base 28 against the force of the springs 24 such that the compression tongue 14 with its compression edge 48 dips into the sheet material 12 from below to form grooves. The one available for grooving Material is limited by the opening dimension between the bending edges 44 of the bending jaws 20 when it hits the flat material 12. The flat material parts 12 'protruding laterally beyond the bending edges 44 are held in a horizontal orientation between the clamping and contact surfaces 52, 46, which lie against one another in pairs. At the same time, the bending jaws and pressure pieces are moved inward against the upset tongue 14 against the force of the compression springs 32, 40 against the force of the compression springs 32, 40 against the force of the compression springs 32, 40 under the action of a torque exerted on the lowering of the upper tool. This sequence of movements is optimally positively controlled via machine-fixed curves 54, against which the bending jaws 20 bear in the direction of the punching tongue 14, with the aim of tension-free carton feeding in the hinge area.

Claims (16)

Verfahren zur Erzeugung von auf der einen Seite rillenförmigen und auf der anderen Seite wulstförmigen Gelenkscharnieren in Flachmaterial aus gegebenenfalls mit Kunststoffolie, Papier, Textilband und/oder Leder überzogenem Karton, bei welchem das Flachmaterial rillenseitig durch eine in das Flachmaterial eintauchende Stauchkante gestaucht und zugleich unter Bildung der Rille gefalzt und wulstseitig an zwei in gleichem Abstand beidseitig der Stauchkante um je eine zur Stauchkante parallele Biegekante in zur Falzung entgegengesetzter Richtung unter Bildung von Wulstaußenkanten biegeverformt wird, wobei während des Eintauchens der Stauchkante in das Flachmaterial der gegenseitige Abstand zwischen den Biegekanten verkleinert wird, dadurch gekennzeichnet, daß die über die Wulstaußenkanten überstehenden Flachmaterialteile (12') unabhängig voneinander an in der Nähe der benachbarten Biegekanten (44) angeordneten Klemmstellen eingespannt und beim Eintauchen der Stauchkante (48) in das Flachmaterial (12) in miteinander fluchtender Ausrichtung aufeinanderzu bewegt werden.Process for the production of hinge-shaped hinge hinges on the one hand and bulge-shaped on the other hand in flat material from cardboard, possibly covered with plastic film, paper, textile tape and / or leather, in which the flat material is compressed on the groove side by a compression edge dipping into the flat material and at the same time forming the groove is folded and the bead is deformed on two sides at the same distance on both sides of the upsetting edge by a bending edge parallel to the upsetting edge in the opposite direction to the fold to form outer bead edges, the mutual distance between the bending edges being reduced while the upsetting edge is immersed in the flat material characterized in that the flat material parts (12 ') projecting beyond the bead outer edges are clamped independently of one another at clamping points arranged in the vicinity of the adjacent bending edges (44) and when the compression edge (48) is immersed in d he flat material (12) is moved towards one another in an aligned alignment. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Klemmstellen zu Beginn des Eintauchvorgangs mit der Biegekante (44) zusammenfallen und im Verlauf der Abstandsverkleinerung zwischen den Biegekanten gleitreibungsfrei auf den über die Wulstaußenseiten überstehenden Flachmaterialteilen (12') nach außen bewegt werden.Method according to claim 1, characterized in that the clamping points coincide with the bending edge (44) at the beginning of the immersion process and in the course the reduction in distance between the bending edges can be moved to the outside without sliding friction on the flat material parts (12 ') projecting beyond the bead outer sides. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Abstand zwischen den Klemmstellen während der Abstandsverkleinerung der Biegekanten (44) etwa gleich bleibt.A method according to claim 2, characterized in that the distance between the clamping points remains approximately the same as the distance between the bending edges (44) is reduced. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Klemmstellen durch die Anlagelinien jeweils zweier unter Zwischenklemmen des Flachmaterials (12) aufeinander abrollender balliger, vorzugsweise teilzylindrischer Klemmflächen (46,52) gebildet werden.Method according to one of Claims 1 to 3, characterized in that the clamping points are formed by the contact lines in each case of two spherical, preferably partially cylindrical clamping surfaces (46, 52) rolling against one another with intermediate clamping of the flat material (12). Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Flachmaterial (12) an den Klemmstellen flächig eingespannt wird.Method according to one of claims 1 to 4, characterized in that the flat material (12) is clamped flat at the clamping points. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Abstandsveränderung zwischen den Biegekanten (44) in Abhängigkeit von ihrer relativen Verschiebelage zur Stauchkante (48) zwangsgesteuert wird.Method according to one of claims 1 to 5, characterized in that the change in distance between the bending edges (44) is positively controlled as a function of their relative displacement position to the compression edge (48). Vorrichtung zur Erzeugung von auf der einen Seite rillenförmigen und auf der anderen Seite wulstförmigen Gelenkscharnieren in Flachmaterial aus gegebenenfalls mit Kunststoffolie, Papier, Textilband und/oder Leder überzogenem Karton mit zwei von einander gegenüberliegenden Seiten gegen das Flachmaterial (12) einwirkenden, relativ zueinander verschiebbaren, vorzugsweise als Ober- und Unterwerkzeuge ausgebildeten Werkzeugen (18,22), deren erstes Werkzeug (18) eine mittig angeordnete langgestreckte, eine Stauch- und Falzkante (48) bildende Stauchzunge (14) sowie zwei neben der Stauchzunge (14) angeordnete Anlageflächen (46) für die an den zu erzeugenden Gelenkscharnieren (10) seitlich überstehenden Flachmaterialteile (12') aufweist, und deren zweites Werkzeug (22) mit zwei gegenüber der Stauchzunge (14) beidseitig versetzt angeordneten, jeweils eine zur Stauch- und Falzkante (48) parallele Biegekante (44) aufweisenden, langgestreckten Biegebacken (20) versehen ist, wobei die Biegebacken im Verlauf der relativen Verschiebebewegung der Werkzeuge (18,22) in Richtung Stauchzunge (14) aufeinanderzu bewegbar sind, dadurch gekennzeichnet, daß die Biegebacken (20) des zweiten Werkzeugs (22) mit Klemmflächen (52) versehen sind, die unter Zwischenklemmen der überstehenden Flachmaterialteile (12') in miteinander fluchtender Ausrichtung gegen die Anlagefläche (46) des ersten Werkzeugs (18) anpreßbar sind, und daß die die Klemm- und Anlageflächen (52,46) tragenden Teile (20,16) zur Ausführung einer synchronen Querbewegung paarweise miteinander kuppelbar sind.Device for producing on one side groove-shaped hinge hinges on the other side in flat material, optionally with plastic film, paper, textile tape and / or leather-covered cardboard with two tools (18, 22) acting from opposite sides against the flat material (12), displaceable relative to one another, preferably designed as upper and lower tools, the first tool (18) of which is a centrally arranged elongated one Upsetting and folding edge (48) forming upset tongue (14) as well as two contact surfaces (46) arranged next to the upset tongue (14) for the flat material parts (12 ') projecting laterally on the articulated hinges (10), and their second tool (22 ) is provided with two elongated bending jaws (20) which are offset on both sides of the upsetting tongue (14) and each have a bending edge (44) which is parallel to the upsetting and folding edge (48), the bending jaws during the course of the relative displacement movement of the tools (18 , 22) can be moved towards one another in the direction of the compression tongue (14), characterized in that the bending jaws (20) of the second tool s (22) are provided with clamping surfaces (52), which can be pressed against the contact surface (46) of the first tool (18) in an aligned alignment with intermediate clamps of the protruding flat material parts (12 '), and that the clamping and contact surfaces ( 52,46) supporting parts (20,16) can be coupled in pairs to carry out a synchronous transverse movement. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Anlageflächen (46) des ersten Werkzeugs (18) an Druckstücken (16) angeordnet sind, die unter der Einwirkung der mit seinen Klemmflächen (52) anschlagenden Biegebacken (20) entgegen der Kraft einer Feder (24) relativ zur Stauchzunge (14) verschiebbar sind.Apparatus according to claim 7, characterized in that the contact surfaces (46) of the first tool (18) are arranged on pressure pieces (16) which, under the action of the bending jaws (20) striking with their clamping surfaces (52), can be displaced relative to the compression tongue (14) against the force of a spring (24). Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß die Anlage- und Klemmflächen (46,52) im Bereich ihrer gegen die überstehenden Flachmaterialteile (12') anliegenden Klemmstellen in einer gemeinsamen, vorzugsweise horizontal ausgerichteten Tangentenebene angeordnet sind.Apparatus according to claim 7 or 8, characterized in that the contact and clamping surfaces (46, 52) are arranged in the area of their clamping points lying against the projecting flat material parts (12 ') in a common, preferably horizontally oriented tangent plane. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß die Biegebacken (20) und die Druckstücke (16) um zu den Stauch- und Biegekanten (48,44) parallele Schwenkachsen (30,38) schwenkbar an den jeweiligen Werkzeugen (18,22) angelenkt sind.Device according to one of claims 7 to 9, characterized in that the bending jaws (20) and the pressure pieces (16) can be pivoted on the respective tools (18) about pivot axes (30, 38) parallel to the upsetting and bending edges (48, 44) , 22) are articulated. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, daß die Druckstücke an einem relativ zur Stauchzone (14) entgegen der Kraft einer Feder (24) verschiebbaren Federboden (28) angelenkt sind.Device according to one of claims 8 to 10, characterized in that the pressure pieces are articulated on a spring base (28) which can be displaced relative to the compression zone (14) against the force of a spring (24). Vorrichtung nach Anspruch 10 oder 11, dadurch gekennzeichnet, daß die Biegebacken (20) und/oder die mit diesen kuppelbaren Druckstücke (16) zwischen je einem die Öffnungsbreite der Biegekanten (44) beim Auftreffen auf das Flachmaterial (12) definierenden, vorzugsweise einstellbaren Anschlag (42 bzw. 34) entgegen der Kraft einer Feder (40,32) um ihre Schwenkachsen (38,30) paarweise aufeinanderzu schwenkbar sind.Apparatus according to claim 10 or 11, characterized in that the bending jaws (20) and / or the pressure pieces (16) which can be coupled to them, between each defining the opening width of the bending edges (44) when they strike the flat material (12), preferably adjustable stop (42 or 34) against the force of a spring (40,32) about their pivot axes (38,30) in pairs towards each other. Vorrichtung nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, daß die Anlage- und Klemmflächen (46,52) eine ballige, vorzugsweise teilzylindrische, paarweise aufeinander abrollende Gestalt aufweisen.Device according to one of claims 7 to 12, characterized in that the contact and clamping surfaces (46, 52) have a spherical, preferably partially cylindrical, shape rolling in pairs. Vorrichtung nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß die Schwenkachsen (30,38) der gegeneinander gepreßten Biegebacken (20) und Druckstücke (16) in bezug auf die Stauchzunge (14) außerhalb der Klemmstellen ihrer unter Zwischenklemmen des Flachmaterials (12) gegeneinander anliegenden Anlage- und Klemmflächen (46,52) angeordnet sind.Device according to one of claims 10 to 13, characterized in that the swivel axes (30, 38) of the bending jaws (20) and pressure pieces (16) pressed against one another with respect to the compression tongue (14) outside the clamping points of their under intermediate clamps of the flat material (12 ) abutting contact and clamping surfaces (46, 52) are arranged. Vorrichtung nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, daß die Biegebacken (20) zur Seite der Stauchzunge (14) hin entlang einer die Querbewegung in Abhängigkeit vom Verschiebeweg definierenden Kurve (54) zwangsgeführt sind.Device according to one of Claims 10 to 14, characterized in that the bending jaws (20) are positively guided to the side of the compression tongue (14) along a curve (54) which defines the transverse movement as a function of the displacement path. Vorrichtung nach einem der Ansprüche 7 bis 15, dadurch gekennzeichnet, daß die Biegebacken (20) an einem das Oberwerkzeug (22) bildenden Stößel (36) angelenkt sind.Device according to one of claims 7 to 15, characterized in that the bending jaws (20) are articulated on a tappet (36) forming the upper tool (22).
EP90120988A 1989-11-02 1990-11-02 Method and device for making hinges in flat cardboard material Expired - Lifetime EP0426188B1 (en)

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DE3936393 1989-11-02
DE3936393 1989-11-02

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GB9414170D0 (en) * 1994-07-13 1994-08-31 Aston Packaging Ltd Hinged clip and fitted article

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EP0426188B1 (en) 1994-03-23
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