EP0263258B1 - Strip steel punch tool with resilient profiled strips - Google Patents

Strip steel punch tool with resilient profiled strips Download PDF

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Publication number
EP0263258B1
EP0263258B1 EP87111424A EP87111424A EP0263258B1 EP 0263258 B1 EP0263258 B1 EP 0263258B1 EP 87111424 A EP87111424 A EP 87111424A EP 87111424 A EP87111424 A EP 87111424A EP 0263258 B1 EP0263258 B1 EP 0263258B1
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EP
European Patent Office
Prior art keywords
strip steel
steel punching
strip
profile
tool according
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 - Lifetime
Application number
EP87111424A
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German (de)
French (fr)
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EP0263258A2 (en
EP0263258A3 (en
Inventor
Karl Marbach
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Karl Marbach GmbH and Co KG
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Karl Marbach GmbH and Co KG
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Priority to AT87111424T priority Critical patent/ATE60537T1/en
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Publication of EP0263258A3 publication Critical patent/EP0263258A3/en
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Publication of EP0263258B1 publication Critical patent/EP0263258B1/en
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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
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/14—Means for treating work or cutting member to facilitate cutting by tensioning the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • 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
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • 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
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4463—Methods and devices for rule setting, fixation, preparing cutting dies

Definitions

  • the invention relates to a steel band punching tool with a carrier plate in which band steel punching knives protruding in slots above the surface of the carrier plate are attached to the carrier plate in parallel with these profile strips of elastic material, which protrude beyond the cutting edge of the band steel punching knives with a punching material contact surface.
  • FR-A-1 364 357 also shows the arrangement of two profile strips (8) which are also made of rubber and which are on the side of a band embossing tool (4) made of hard plastic and having a rounded tip Support plate (2) are glued on.
  • a profile tape (9) is glued, which forms with its triangular cross section the counter profile to the profile strips (8) and has a longitudinal groove (10) in which the compression of the profile strips (8) during the punching process Embossing tool tip (4) can be added.
  • Both profile strips (8) and the profile strip (9) are designed in their geometrical configuration so that they should prevent cracks or fissures on the surface of the cardboard to be embossed in the area of the embossing during the embossing process. Accordingly, the special, i.e. profile strips (8) and profile strips (9) adapted to the respective embossing shape are used. Due to the special geometric configuration of the profile strips for only one purpose, this increases the manufacturing costs of such parts and limits their universal applicability regardless of the embossing or cutting die provided on the counterplate. In the aforementioned French patent specification, it is expressly pointed out that, due to the selected cross-sectional shape of the profiled strip (9), the formation of cracks at the embossing points is to be prevented. (P.3, 2nd column, Z.35-41). This training can not prevent the breakpoints between the individual punch cuts. They must therefore be designed to be relatively wide in order to enable safe handling of the punched sheet without disintegration.
  • the cardboard material to be cut is first pressed against the counterpressure roller by the leading profile strip (17) and thus held; when rolling further, the tip of the cutting knife (parts (4) comes to rest on the punching material before engagement of the trailing profile strip (17).
  • the build-up of tension within the punching material to be cut is also caused here, so that the interface is torn prematurely and thus frayed is caused.
  • the known profile strips have a square cross section for easy manufacture and attachment.
  • punching in particular when embossing or creasing matrices are also arranged on the counterplate, the individual panels deform and before the punching is done, the paper or cardboard is torn.
  • the cardboard has a cover layer on it, it tends to tear and there are very unsightly frayed punched edges, especially with colored surfaces.
  • the breakpoints must have relatively large cross-sectional dimensions so that they do not tear through.
  • the object of the present invention is to improve a steel strip punching tool of the type mentioned at the outset so that punching with clean edges without fraying is achieved, even if stamping dies are used. Furthermore, breakpoints should be made possible with a material cross-section that is as small as possible, so that the benefits can be easily removed later.
  • the invention provides that the profile strip is designed so that a vertical Load moves its punching material contact surface against the band steel punch knife and that at least the side surface of the profile strip facing the band steel punch knife is inclined towards the cutting edge of the band steel punch knife and / or that a cross-sectional area of the elastic profile strip facing the band steel punch knife has a greater hardness than the remaining cross section.
  • the punching material contact surface is laterally displaced.
  • an angle of inclination from the vertical of approximately 10 ° can be provided.
  • Cross-sectional area is a region approximately parallel to the side surface of the profile strip, this cross-sectional area running at an angle to the base surface when an inclination angle is arranged and tilts when the punching process is subjected to a vertical load while increasing the angle of inclination.
  • the profile strip is designed as a hollow profile.
  • the inner walls of the hollow profile which run approximately perpendicular to the carrier plate, can be inclined towards the cutting edge of the band steel punching knife, so that the profile strip can have approximately a parallelogram cross-section and, when loaded, a parallel displacement of the punching material contact surface occurs towards the cutting edge, as in the folding movement of a parallelogram-like one Quadrilateral joints.
  • edge of the profile strip facing away from the band steel punching knife can be greatly rounded, so that a constant transition of the surface pressure is achieved and thus the pressing points in the edge area are largely avoided, but at least become much less visible.
  • the profile strip can be composed of at least two strips, the strip closer to the band steel punching knife having the greater hardness having.
  • the strip closer to the band steel punching knife having the greater hardness having.
  • the strip closer to the band steel punching knife having the greater hardness having.
  • the strip closer to the band steel punching knife having the greater hardness having.
  • the strip closer to the band steel punching knife having the greater hardness having.
  • E.g. can be composed of foam rubber strips of different hardness.
  • the transitions in the interior of the hollow profile can be rounded.
  • the strip steel punching tool partially shown in cross section in FIG. 1 has a carrier plate 1 made of plywood, with slots 2 in which strip steel punching knives 3 are inserted.
  • the back 4 of the band steel punching knife 3 is supported on a hardened steel plate 5, so that when the opposite cutting edge 6 is loaded, it cannot evade.
  • the profile strips 7, 7 ⁇ are preferably glued as close as possible to the band steel punching knives 3 on the surface 8 of the carrier plate 1.
  • the paper or cardboard sheet to be processed is placed on the stamping material contact surface 9, then a counterplate, not shown, is pressed in a known manner against the cutting edge 6, the profile strips 7, 7 'being compressed until the cardboard or paper is punched through. Then the counter plate is lifted off again. Due to the elasticity of the profile strips 7, 7 ', the punched-out, still interconnected benefits are raised above the cutting edge 6. The entire sheet of paper or cardboard can then be transported to a next processing station without fear of jamming with the band steel punching knives 3.
  • FIGS. 2 to 4 Various exemplary embodiments are shown in FIGS. 2 to 4.
  • the embodiment of Figure 2 is a full profile made of foam rubber or cork rubber.
  • the not shown Band steel punch knife 3 facing side surface 10 extends at an angle of inclination 11, which can be varied depending on the application. An angle of approximately 10 ° -15 ° has proven to be particularly advantageous for processing the usual cartons for folding boxes.
  • a curve 12 or a corresponding beveling of the upper edge away from the band steel punching knife 3 the formation of visible imprints on the cardboard is reduced, in particular on sensitive surfaces.
  • the exemplary embodiment in FIG. 3 is a hollow profile with an approximately trapezoidal cross section.
  • the corners 13 of the interior 14 are rounded to increase the fatigue strength.
  • the corners 13 ⁇ and 13 "can be rounded with a larger radius, as can be seen from FIG. 3.
  • the profile strip 7 can be formed from cross-sectional areas 15, 15 ⁇ with rubber, sponge rubber or the like with different hardness, the cross-sectional area 15 running parallel to the side surface 10 and forming it being made harder (over 40 Shore).
  • the course of the separation of the areas 15, 15 ⁇ is shown in dashed lines in the embodiment of Figures 3 and 4.
  • the profile 3 can for example be done by gluing two profiled strips 15, 15,.
  • the side surface 17 opposite the side surface 10 can be designed to run in parallel (indicated by dashed lines).
  • a V-recess 18 is provided to form the side surface 10 which extends at an inclination angle 11 of approximately 10 ° -15 °, which has a basic angle of 90 °, the transition with a Rounding 20 can be provided to increase the fatigue strength.

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  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Springs (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Catalysts (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Scissors And Nippers (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Heat Treatment Of Articles (AREA)
  • Turning (AREA)
  • Finger-Pressure Massage (AREA)

Abstract

In a strip steel punch tool with a supporting plate (1), wherein strip steel punch cutters (3) projecting beyond the surface (8) of the supporting plate (1) are held in slots (2) and profiled strips (7, 7') made of resilient material, preferably rubber, cellular rubber, rubber cork or the like, are fastened to the supporting plate (1) in parallel and next to the said cutters, these profiled strips protruding above the cutting edge (6) of the strip steel punch cutters (3) with their punching material contact face (9), it is proposed, in order to punch clean edges especially in large numbers, that the profiled strip (7, 7') be constructed such that, when loaded vertically, its punching material contact face (9) is displaced towards the strip steel punch cutter (3). <IMAGE>

Description

Die Erfindung betrifft ein Bandstahlstanzwerkzeug mit einer Trägerplatte bei der in Schlitzen über die Oberfläche der Trägerplatte vorstehende Bandstahlstanzmesser gehalten und parallel neben diesen Profilstreifen aus elastischem Material vorzugsweise Gummi auf der Trägerplatte befestigt sind, die die Schneidkante der Bandstahlstanzmesser mit einer Stanzmaterialanlagefläche überragen.The invention relates to a steel band punching tool with a carrier plate in which band steel punching knives protruding in slots above the surface of the carrier plate are attached to the carrier plate in parallel with these profile strips of elastic material, which protrude beyond the cutting edge of the band steel punching knives with a punching material contact surface.

Ein solches Bandstahlstanzwerkzeug ist in der französischen Patentschrift FR-A-1 364 357 beschrieben. Die dort gezeigten Profilstreifen (Figur 3, Teile 5: Beschreibung S.3, 1.Spalte, Z.14-22) haben einen quadratischen Querschnitt.Such a steel strip punching tool is described in French patent FR-A-1 364 357. The profile strips shown there (Figure 3, Part 5: Description p.3, 1st column, Z.14-22) have a square cross section.

In der FR-A-1 364 357 ist in den Figuren 2, 4 ferner die Anordnung von zwei ebenfalls aus Kautschuk bestehenden Profilstreifen (8) gezeigt, die seitlich an einem aus hartem Kunststoff hergestellten und eine gerundete Spitze aufweisenden Bandprägewerkzeugen (4) auf der Tragplatte (2) aufgeklebt sind. Auf der Gegenplatte (6) ist ein Profilband (9) angeklebt, das mit seinem dreieckigen Querschnitt das Gegenprofil zu den Profilstreifen (8) bildet und eine längs verlaufende Nut (10) aufweist, in der bei Kompression der Profilstreifen (8) beim Stanzvorgang die Prägewerkzeugspitze (4) aufgenommen werden kann. Beide Profilstreifen (8) und das Profilband (9) sind in deren geometrischen Ausgestaltung dabei so ausgelegt, daß sie durch ihr Zusammenwirken Risse oder Fissuren auf der Oberfläche des zu prägenden Kartons im Bereich der Prägung während des Prägevorgangs verhindern sollen. Demgemäß müssen an die speziellen, d.h. an die jeweilige Prägeform angepaßte Profilstreifen (8) und Profilbänder (9) verwendet werden. Dies erhöht aufgrund der speziellen geometrischen Ausgestaltung der Profilstreifen für nur einen Einsatzzweck die Herstellungskosten solcher Teile und schränkt deren universelle Einsetzbarkeit unabhängig der auf der Gegenplatte vorgesehenen Präge- oder Schnittmatrize ein. In der genannten französischen Patentsachrift wird ausdrücklich darauf hingewiesen, daß aufgrund der gewählten Querschnittsform des profilierten Bandes (9) die Rißbildung an den Prägestellen verhindert werden soll. (S.3, 2.Sp., Z.35-41). Diese Ausbildung kann nicht verhindern, daß die Haltepunkte zwischen den einzelnen Stanzschnitten reißen. Sie müssen daher relativ breit ausgebildet werden, um eine sichere Handhabung des gestanzten Bogens noch ohne Zerfall zu ermöglichen.In FIGS. 2, 4, FR-A-1 364 357 also shows the arrangement of two profile strips (8) which are also made of rubber and which are on the side of a band embossing tool (4) made of hard plastic and having a rounded tip Support plate (2) are glued on. On the counter plate (6) a profile tape (9) is glued, which forms with its triangular cross section the counter profile to the profile strips (8) and has a longitudinal groove (10) in which the compression of the profile strips (8) during the punching process Embossing tool tip (4) can be added. Both profile strips (8) and the profile strip (9) are designed in their geometrical configuration so that they should prevent cracks or fissures on the surface of the cardboard to be embossed in the area of the embossing during the embossing process. Accordingly, the special, i.e. profile strips (8) and profile strips (9) adapted to the respective embossing shape are used. Due to the special geometric configuration of the profile strips for only one purpose, this increases the manufacturing costs of such parts and limits their universal applicability regardless of the embossing or cutting die provided on the counterplate. In the aforementioned French patent specification, it is expressly pointed out that, due to the selected cross-sectional shape of the profiled strip (9), the formation of cracks at the embossing points is to be prevented. (P.3, 2nd column, Z.35-41). This training can not prevent the breakpoints between the individual punch cuts. They must therefore be designed to be relatively wide in order to enable safe handling of the punched sheet without disintegration.

Das Problem der Rißbildung stellt sich auch bei der aus US-A-3 288 007 bekannten Vorrichtung, bei welcher die Schneidemesserspitzen in Ruhestellung der Profilstreifen, d.h. bei nicht zusammengedrückten Profilsteifen, über die Stanzmaterial-Kontaktflächen der Profilstreifen vorstehen. Die dort gezeigte Schneidvorrichtung ist umfangsseitig an einer zylindrischen Rolle angebracht, wobei die Profilstreifen sowie die Spitzen der Schneidemesser nur geringfügig über der Oberfläche der Zylinderrolle hervorstehen. Als Gegenplatte ist hier eine Anpreßrolle vorgesehen, die ebenfalls umfangsseitig Vertiefungen aufweist, in welchen kanalartige Gegenanpreß­elemente aus einem ebenfalls elastomeren Kunststoff angeordnet sind. (Vergleiche hierzu Figur 1 und 3). Beim Abrollvorgang der das Schneidemesser aufweisenden Rolle auf der Gegenanpreßrolle wird hierbei das zu schneidende Kartonmaterial als erstes von dem vorauslaufenden Profilstreifen (17) an die Gegenanpreßrolle angepreßt und somit gehalten; beim weiteren Abrollen kommt die Spitze des Schneidemessers (Teile (4) bereits vor Eingriff des nachlaufenden Profilstreifens (17) auf dem Stanzmaterial zu liegen. Der Zugspannungsaufbau innerhalb des zu schneidenden Stanzmaterials wird hier ebenfalls hervorgerufen, so daß ein vorzeitiges Durchreißen und somit Ausfransen der Schnittstelle hervorgerufen wird.The problem of crack formation also arises in the device known from US-A-3 288 007, in which the cutting knife tips are in the rest position of the profile strips, i.e. if the profile strips are not compressed, protrude beyond the contact surfaces of the profile strips. The cutting device shown there is attached to the circumference of a cylindrical roller, the profile strips and the tips of the cutting knives only protruding slightly above the surface of the cylindrical roller. A pressure roller is provided here as the counter plate, which also has circumferential recesses in which channel-like counter pressure elements made of a likewise elastomeric plastic are arranged. (Compare Figures 1 and 3). During the rolling process of the roll having the cutting knife on the counterpressure roller, the cardboard material to be cut is first pressed against the counterpressure roller by the leading profile strip (17) and thus held; when rolling further, the tip of the cutting knife (parts (4) comes to rest on the punching material before engagement of the trailing profile strip (17). The build-up of tension within the punching material to be cut is also caused here, so that the interface is torn prematurely and thus frayed is caused.

Die in US-A-3 288 007 gezeigte Neigung der zum Schneidemesser (4) hin liegenden Fläche der Profilstreifen (12, 12ʹ) kann im Gegensatz zur vorliegenden Anmeldung die genannte Bewegungstendenz der Stanzmaterial-Kontaktflächen (17, 17ʹ) nicht hervorrufen.In contrast to the present application, the inclination of the surface of the profile strips (12, 12ʹ) facing the cutting knife (4) shown in US Pat. No. 3,288,007 cannot cause the movement tendency of the punching material contact surfaces (17, 17ʹ).

Aufgrund der Zwangsführung der Profilstreifen (12, 12ʹ) beim Kompressionsvorgang zwischen den Schenkeln des Schneidemesserhalters (11, 11ʹ) und speziell wegen der Führung entlang den geneigten, anliegenden Oberflächen der Teile (11, 12), wird trotz der Freistellen (13, 13ʹ) zwischen Schneidemesser (4) und Profilstreifen (12, 12ʹ) im Kontaktflächenbereich (17) eine hauptsächlich von dem Schneidemesser (4) weg orientierte Bewegung der beidseitig des Schneidemssers (4) befindlichen Kontaktflächen (17, 17ʹ) erfolgen, so daß hierdurch ebenfalls durch Zugspannungsabildung beidseitig der Schnittränder ein besseres Durchtrennen des Stanzmaterials stattfindet, mit den genannten Nachteilen.Due to the forced guidance of the profile strips (12, 12ʹ) during the compression process between the legs of the cutting knife holder (11, 11ʹ) and especially because of the guidance along the inclined, adjacent surfaces of the parts (11, 12), despite the free spaces (13, 13ʹ) Between the cutting knife (4) and the profile strip (12, 12ʹ) in the contact surface area (17), a movement of the contact surfaces (17, 17 befind) located on both sides of the cutting knife (4), mainly oriented away from the cutting knife (4), takes place, so that this also results in the formation of tension better cutting of the punching material takes place on both sides of the cut edges, with the disadvantages mentioned.

Um gleichzeitig mehrere Nutzen aus einem Papier- oder Kartonbogen in mehreren Stanzstufen herauszustanzen ist es bekannt, bei einem aus der DE-PC-31 35 980 bekannten Bandstahlstanzwerkzeug parallel dicht neben den Bandstahlstanzmessern Profilstreifen aus Moosgummi aufzukleben, durch die beim Stanzen die einzelnen Nutzen zum Weitertransport des ganzen Papier- oder Kartonbogens wieder über die Schneiden der Bandstahlstanzmesser anzuheben. Daß die gestanzten Teile nicht herausfallen, sind diese noch über Haltepunkte miteinander verbunden, d.h. in den Bandstahlstanzwerkzeugen sind Aussparungen, so daß an diesen Stellen die einzelnen Nutzen noch durch Materialreste miteinander verbunden sind. Erfolgt kein sauberes Herausheben der Nutzen aus den Bandstahlstanzmesserformen, so können die Papierbogen nicht mehr in ihrer Gesamtheit zur nächsten Stanzstation weitertransportiert werden und der Fertigungsfluß stoppt.In order to punch out several benefits from a sheet of paper or cardboard in several punching stages at the same time, it is known to glue profile strips made of foam rubber parallel to one another from a strip steel punching tool known from DE-PC-31 35 980, by means of which the individual benefits for further transport are punched in next to the band steel punching knives to lift the entire sheet of paper or cardboard over the cutting edges of the band steel punching knife. So that the punched parts do not fall out, they are still connected to each other via breakpoints, ie there are recesses in the band steel punching tools, so that the individual benefits are still connected to one another by material residues at these points. If the benefits are not properly lifted out of the band steel punching knife shapes, the paper sheets in their entirety can no longer be transported to the next punching station and the production flow stops.

Es ist auch bekannt, zwischen den Bandstahlstanzmessern federbetätigte Auswerfer anzuordnen. Der Herstellungsaufwand ist aber hier groß.It is also known to arrange spring-operated ejectors between the band steel punching knives. The manufacturing effort is great here.

Die bekannten Profilstreifen weisen zur einfachen Herstellung und Anbringung einen quadratischen Querschnitt auf. Beim Stanzen, insbesondere wenn gleichzeitig noch Präge- oder Rillmatrizen auf der Gegenplatte angeordnet sind, verformen sich die einzelnen Nutzen und bevor ganz durchgestanzt ist, erfolgt ein Durchreißen des Papiers oder Kartons. Insbesondere wenn der Karton eine Deckschicht aufweißt neigt diese zum Ausreißen und es gibt, insbesondere bei farbiger Oberfläche, sehr unschöne ausgefranste Stanzränder. Die Haltepunkte müssen, damit sie nicht durchreißen, relativ große Querschnittsabmessungen haben.The known profile strips have a square cross section for easy manufacture and attachment. When punching, in particular when embossing or creasing matrices are also arranged on the counterplate, the individual panels deform and before the punching is done, the paper or cardboard is torn. Especially if the cardboard has a cover layer on it, it tends to tear and there are very unsightly frayed punched edges, especially with colored surfaces. The breakpoints must have relatively large cross-sectional dimensions so that they do not tear through.

In Vermeidung der geschilderten Nachteile liegt der vorliegenden Erfindung die Aufgabe zugrunde ein Bandstahlstanzwerkzeug der eingangs genannten Art so zu verbessern, daß eine Stanzung mit sauberen Rändern ohne Ausfransungen erreicht werden, auch wenn Prägematrizen Verwendung finden. Weiter sollen Haltepunkte mit einem möglichst kleinen Materialquerschnitt ermöglicht werden, daß später ein leichtes Heraustrennen der Nutzen ermöglicht wird.In avoiding the disadvantages described, the object of the present invention is to improve a steel strip punching tool of the type mentioned at the outset so that punching with clean edges without fraying is achieved, even if stamping dies are used. Furthermore, breakpoints should be made possible with a material cross-section that is as small as possible, so that the benefits can be easily removed later.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß der Profilstreifen so ausgebildet ist, daß bei einer vertikalen Belastung sich seine Stanzmaterial-Kontaktfläche gegen das Bandstahlstanzmesser hin bewegt und daß mindestens die dem Bandstahlstanzmesser zugekehrte Seitenfläche des Profilstreifens zur Schneidkante des Bandstahlstanzmesser hin geneigt ausgebildet ist und/oder daß ein dem Bandstahlstanzmesser zugekehrter Querschnittsbereich des elastischen Profilstreifens eine größere Härte aufweist, als der Restquerschnitt.To achieve this object, the invention provides that the profile strip is designed so that a vertical Load moves its punching material contact surface against the band steel punch knife and that at least the side surface of the profile strip facing the band steel punch knife is inclined towards the cutting edge of the band steel punch knife and / or that a cross-sectional area of the elastic profile strip facing the band steel punch knife has a greater hardness than the remaining cross section.

Durch diese Bewegungstendenz werden die gestanzten Ränder der Nutzen gegeneinander gespannt, so daß die Gefahr des vorzeitigen Ausreißens vor dem vollständigen Durchstanzen wesentlich herabgesetzt und damit eine bessere Randqualität erreicht wird. Gleichzeitig wird die Zugbelastung in den Haltepunkten wesentlich herabgesetzt, so daß die erforderliche Querschnittsflächen der Haltepunkte kleingehalten werden kann und so später beim vollständigen Trennen nur wenig störende kleine Abrißflächen zurückbleiben.As a result of this tendency to move, the punched edges of the panels are stretched against one another, so that the risk of premature tearing out before complete punching is substantially reduced and thus a better edge quality is achieved. At the same time, the tensile load in the breakpoints is significantly reduced, so that the required cross-sectional areas of the breakpoints can be kept small and so that only little disruptive small tear-off areas remain later when completely separated.

Bei einer vertikalen Belastung erfolgt dann eine seitliche Versetzung der Stanzmaterial-­Kontaktfläche. Vorzugsweise kann ein Neigungswinkel gegenüber der Vertikalen von etwa 10° vorgesehen sein.With a vertical load, the punching material contact surface is laterally displaced. Preferably, an angle of inclination from the vertical of approximately 10 ° can be provided.

Die Wirkung kann weiter noch dadurch verstärkt werden, daß dieser härter ausgebildete Querschnittsbereich ein etwa zur Seitenfläche des Profilstreifens paralleler Bereich ist, wobei bei Anordnung eines Neigungswinkels dieser Querschnittsbereich in einem Winkel zur Grundfläche verläuft und bei einer vertkalen Belastung beim Stanzvorgang unter Vergrößerung des Neigungswinkels kippt.The effect can be further enhanced by the fact that it is trained harder Cross-sectional area is a region approximately parallel to the side surface of the profile strip, this cross-sectional area running at an angle to the base surface when an inclination angle is arranged and tilts when the punching process is subjected to a vertical load while increasing the angle of inclination.

Eine andere Möglichkeit zur Erzielung dieser Kippbewegung beim Stanzvorgang besteht darin, den Profilstreifen als Hohlprofil auszubilden. Dabei können die etwa senkrecht zur Trägerplatte verlaufenden Innenwände des Hohlprofils gegen die Schneide des Bandstahlstanzmessers hin geneigt verlaufen, so daß der Profilstreifen etwa einen Parallelogrammquerschnitt aufweisen kann und bei einer Belastung eine Parallelverschiebung der Stanzmaterial-Kontaktfläche zur Schneidkante hin eintritt, wie bei der Zusammenklappbewegung eines parallelogrammartigen Gelenkvierecks.Another possibility for achieving this tilting movement during the punching process is to design the profile strip as a hollow profile. The inner walls of the hollow profile, which run approximately perpendicular to the carrier plate, can be inclined towards the cutting edge of the band steel punching knife, so that the profile strip can have approximately a parallelogram cross-section and, when loaded, a parallel displacement of the punching material contact surface occurs towards the cutting edge, as in the folding movement of a parallelogram-like one Quadrilateral joints.

Weiter kann die vom Bandstahlstanzmesser abgewandte Kante des Profilstreifens stark abgerundet sein, so daß ein steter Übergang der Flächenpressung erreicht wird und damit die Presstellen im Randbereich weitgehend vermieden zumindest aber wesentlich weniger sichtbar werden.Furthermore, the edge of the profile strip facing away from the band steel punching knife can be greatly rounded, so that a constant transition of the surface pressure is achieved and thus the pressing points in the edge area are largely avoided, but at least become much less visible.

In Weiterentwicklung der Erfindung kann der Profilstreifen aus mindestens zwei Streifen zusammengesetzt sein, wobei der der dem Bandstahlstanzmesser nähere Streifen die größere Härte aufweist. Bspw. können hier zu Profilstreifen aus Moosgummi Streifen verschiedener Härte zusammengesetzt sein.In a further development of the invention, the profile strip can be composed of at least two strips, the strip closer to the band steel punching knife having the greater hardness having. E.g. can be composed of foam rubber strips of different hardness.

Zur Erhöhung der Dauerfestigkeit von den verwendeten Hohlprofilen können die Übergänge im Innenraum des Hohlprofils gerundet ausgeführt sein.To increase the fatigue strength of the hollow profiles used, the transitions in the interior of the hollow profile can be rounded.

Weitere erfindungsgemäße Ausbildungen sind den Unteransprüchen zu entnehmen und werden mit ihren Vorteilen in der nachstehenden Beschreibung näher erläutert. In den beigefügten Zeichnungen zeigt

  • Figur 1 einen Teilschnitt durch ein Bandstahlstanzwerkzeug
  • Figuren 2 bis 5 verschiedene Ausführungsformen von Profilstreifen.
Further designs according to the invention can be found in the subclaims and their advantages are explained in more detail in the description below. In the accompanying drawings
  • 1 shows a partial section through a band steel punching tool
  • Figures 2 to 5 different embodiments of profile strips.

Bei der nachfolgenden Beschreibung der verschiedenen Ausführungsbeispiele werden für alle entsprechenden Teile die gleichen Bezugszeichen verwendet. Das in Figur 1 teilweise im Querschnitt dargestellte Bandstahlstanzwerkzeug weist eine aus Sperrholz bestehende Trägerplatte 1 auf, mit Schlitzen 2 in denen Bandstahlstanzmesser 3 eingesetzt sind. Der Rücken 4 der Bandstahlstanzmesser 3 stützt sich auf einer gehärteten Stahlplatte 5 ab, so daß bei Belastung der gegenüberliegenden Schneidkante 6 diese nicht ausweichen kann.In the following description of the various exemplary embodiments, the same reference symbols are used for all corresponding parts. The strip steel punching tool partially shown in cross section in FIG. 1 has a carrier plate 1 made of plywood, with slots 2 in which strip steel punching knives 3 are inserted. The back 4 of the band steel punching knife 3 is supported on a hardened steel plate 5, so that when the opposite cutting edge 6 is loaded, it cannot evade.

Beidseitig sind an den Bandstahlstanzmessern 3 Profilstreifen 7, 7ʹ angeordnet, deren parallel zur Oberfläche 8 der Trägerplatte 1 verlaufende Stanzmaterial-Kontaktfläche 9 die Schneidkante 6 überragen. Die Profilstreifen 7, 7ʹ sind möglichst nahe den Bandstahlstanzmessern 3 auf der Oberfläche 8 der Trägerplatte 1, vorzugsweise aufgeklebt.3 profile strips 7, 7 'are arranged on both sides of the band steel punching knives, the punching material contact surface 9 extending parallel to the surface 8 of the carrier plate 1 projecting beyond the cutting edge 6. The profile strips 7, 7ʹ are preferably glued as close as possible to the band steel punching knives 3 on the surface 8 of the carrier plate 1.

Beim Stanzvorgang wird der zu bearbeitende Papier- oder Kartonbogen auf der Stanzmaterial-Kontaktfläche 9 aufgelegt, dann wird eine nicht dargestellte Gegenplatte in bekannter Weise gegen die Schneidekante 6 gepresst, wobei die Profilstreifen 7, 7ʹ komprimiert werden bis der Karton oder das Papier durchgestanzt ist. Danach wird die Gegenplatte wieder abgehoben. Durch die Elastizität der Profilstreifen 7, 7ʹ werden die durchgestanzten, über nicht dargestellte Haltepunkte, noch miteinander verbundenen Nutzen über die Schneidkante 6 angehoben. Der gesamte Papier- oder Kartonbogen kann dann in eine nächste Bearbeitungsstation weitertransportiert werden, ohne daß ein Verhaken mit den Bandstahlstanzmessern 3 zu befürchten ist.During the punching process, the paper or cardboard sheet to be processed is placed on the stamping material contact surface 9, then a counterplate, not shown, is pressed in a known manner against the cutting edge 6, the profile strips 7, 7 'being compressed until the cardboard or paper is punched through. Then the counter plate is lifted off again. Due to the elasticity of the profile strips 7, 7 ', the punched-out, still interconnected benefits are raised above the cutting edge 6. The entire sheet of paper or cardboard can then be transported to a next processing station without fear of jamming with the band steel punching knives 3.

Um ein vorzeitiges Durchreißen an der Stanzstelle durch Zugkräfte im Karton zu vermeiden, haben die Profilstreifen 7, 7ʹ eine spezielle Formgebung. Verschiedene Ausführungsbeispiele sind in den Figuren 2 bis 4 dargestellt. Beim Ausführungsbeispiel der Figur 2 handelt es sich um Vollprofil aus Moosgummi oder auch Korkgummi. Die dem nicht dargestellten Bandstahlstanzmesser 3 zugekehrte Seitenfläche 10 verläuft unter einem Neigungswinkel 11, der je nach dem Anwendungszweck variiert werden kann. Ein Winkel von etwa 10°-15° hat sich als besonders vorteilhaft erwiesen für die Bearbeitung der üblichen Kartons für Faltschachteln. Durch Anorndung einer Rundung 12 oder einer entsprechenden Abschrägung der vom Bandstahlstanzmesser 3 wegliegenden oberen Kante wird die Bildung sichtbarer Abdrucke am Karton, insbesondere bei empfindlichen Oberflächen vermindert.In order to avoid premature tearing at the punching point due to tensile forces in the box, the profile strips 7, 7ʹ have a special shape. Various exemplary embodiments are shown in FIGS. 2 to 4. The embodiment of Figure 2 is a full profile made of foam rubber or cork rubber. The not shown Band steel punch knife 3 facing side surface 10 extends at an angle of inclination 11, which can be varied depending on the application. An angle of approximately 10 ° -15 ° has proven to be particularly advantageous for processing the usual cartons for folding boxes. By arranging a curve 12 or a corresponding beveling of the upper edge away from the band steel punching knife 3, the formation of visible imprints on the cardboard is reduced, in particular on sensitive surfaces.

Beim Ausführungsbeispiel der Figur 3 handelt es sich um ein Hohlprofil mit angenähert trapezförmigem Querschnitt. Die Ecken 13 des Innenraums 14 sind zur Erhöhung der Dauerfestigkeit gerundet. Dabei können zur Erhöhung der Verschiebewirkung in Richtung zum Bandstahlstanzmesser 3 hin, die Ecken 13ʹ und 13" mit einem größeren Radius gerundet sein, wie dies aus Figur 3 ersichtlich ist.The exemplary embodiment in FIG. 3 is a hollow profile with an approximately trapezoidal cross section. The corners 13 of the interior 14 are rounded to increase the fatigue strength. In order to increase the displacement effect in the direction of the band steel punching knife 3, the corners 13ʹ and 13 "can be rounded with a larger radius, as can be seen from FIG. 3.

Zur weiteren Erhöhung der Kippneigung kann der Profilstreifen 7 aus Querschnittsbereichen 15, 15ʹ mit Gummi, Moosgummi oder dgl. mit verschiedener Härte ausgebildet sein, wobei der parallel zur Seitenfläche 10 verlaufende und diese bildende Querschnittsbereich 15 härter (über 40 Shore) ausgebildet ist. Der Verlauf der Trennung der Bereiche 15, 15ʹ ist im Ausführungsbeispiel der Figuren 3 und 4 gestrichelt dargestellt. Das Profil 3 kann bspw. durch Verkleben zweier profilierter Streifen 15, 15ʹ erfolgen.To further increase the tendency to tilt, the profile strip 7 can be formed from cross-sectional areas 15, 15ʹ with rubber, sponge rubber or the like with different hardness, the cross-sectional area 15 running parallel to the side surface 10 and forming it being made harder (over 40 Shore). The course of the separation of the areas 15, 15ʹ is shown in dashed lines in the embodiment of Figures 3 and 4. The profile 3 can for example be done by gluing two profiled strips 15, 15,.

Zur weiteren Erhöhung der Kippneigung kann, wie in Figur 4 dargestellt ist, die der Seitenfläche 10 gegenüberliegende Seitenfläche 17 parallel verlaufend ausgebildet sein (gestrichelt angedeutet).To further increase the tendency to tilt, as shown in FIG. 4, the side surface 17 opposite the side surface 10 can be designed to run in parallel (indicated by dashed lines).

Beim in Fig. 5 dargestellten weiteren Ausführungsbeispiel eines elastischen Profilstreifens ist dieser zur Bildung der unter einem Neigungswinkel 11 von etwa 10°-15° verlaufenden Seitenfläche 10 eine V-Aussparung 18 vorgesehen, die einen Grundwinkel von 90° aufweist, wobei der Übergang mit einer Rundung 20 zur Erhöhung der Dauerfestigkeit versehen sein kann.In the further exemplary embodiment of an elastic profile strip shown in FIG. 5, a V-recess 18 is provided to form the side surface 10 which extends at an inclination angle 11 of approximately 10 ° -15 °, which has a basic angle of 90 °, the transition with a Rounding 20 can be provided to increase the fatigue strength.

Zur Herabsetzung des Restquerschnitts 15ʹ können im Auflagebereich des Profilstreifens 7 Aussparungen 21 vorgesehen sein, durch deren Querschnittsabmessungen die Härte im Restquerschnitt 15ʹ weitgehend beeinflußbar ist.To reduce the remaining cross section 15ʹ 7 recesses 21 can be provided in the support area of the profile strip, the hardness in the remaining cross section 15ʹ can be largely influenced by their cross-sectional dimensions.

Claims (18)

1. A strip steel punching tool comprising a carrier plate (1) in which held in slots (2) are strip steel punching blades (3) which project above the surface (8) of the carrier plate (1), and fixed on the carrier plate (1) and parallel beside said strip steel punching blades (3) are profile strips (7, 7ʹ) of resilient material, preferably rubber, rubber sponge, rubber cork or the like, the profile strips projecting with their punching material contact surface (9) beyond the cutting edge (6) of the strip steel punching blades (3), characterised in that the profile strip (7, 7ʹ) is of such a configuration that upon a vertical loading being applied its punching arterial contact surface (9) is displaced towards the strip steel punching blade (3) and for that purpose at least the side surface (10) of the profile strip (7, 7ʹ), which is towards the strip steel punching blade (3), is arranged to be inclined towards the strip steel punching blade (3) and/or a cross-sectional region (15) of the resilient profile strip (7, 7ʹ), which is towards the strip steel punching blade (3), is of greater hardness than the remaining cross-section (15ʹ).
2. A strip steel tool according to claim 1 characterised in that there is an angle of inclination (11) relative to the vertical of about 10° to 15°.
3. A strip steel punching tool according to claim 1 characterised in that the cross-sectional region (15) is a region which is approximately parallel to the side surface (10) of the profile strip (7, 7ʹ).
4. A strip steel punching tool according to one of claims 1 to 3 characterised in that the profile strip (7, 7ʹ) is in the form of a hollow profile (Figure 3).
5. A strip steel punching tool according to claim 4 characterised in that the approximately perpendicularly extending inside walls of the hollow profile extend inclinedly towards the cutting edge of the strip steel punching blade (3).
6. A strip steel punching tool according to one of claims 1 to 5 characterised in that the profile strip (7, 7ʹ) is of approximately a parallelogram-shaped cross-section.
7. A strip steel punching tool according to claim 5 or claim 6 characterised in that the inside space (14) of the hollow profile is also approximately of a parallelogram-shaped cross-section.
8. A strip steel punching tool according to claim 6 characterised in that the edge of the profile strip (7, 7ʹ) which faces away from the strip steel punching blade (3) is heavily rounded (rounding 12) or bevelled.
9. A strip steel punching tool according to one of claims 1 to 8 characterised in that the profile strip (7, 7ʹ) is composed of at least two strips (cross-sectional regions 15, 15ʹ) and that the strip (15) which is closer to the strip steel punching blade (3) is of greater hardness.
10. A strip steel punching tool according to claim 9 characterised in that the profile strip (7, 7ʹ) is composed of material strips of different hardnesses such as rubber sponge strips.
11. A strip steel punching tool according to claim 4 characterised in that the inside space (14) of the hollow profile has rounded junctions (corners 13, 13ʹ, 13").
12. A strip steel punching tool according to one of claims 1 to 11 characterised in that the profile strip (7, 7ʹ) comprises cork rubber.
13. A strip steel punching tool according to claim 1 or claim 3 characterised in that the remaining cross-section of the resilient profile strip (7, 7ʹ) has a Shore hardness of below 40.
14. A strip steel punching tool according to claim 1 or claim 2 characterised in that the side surface (10) of the profile strip (7, 7ʹ) has a V-shaped recess (18) towards the strip steel punching blade (3) to form the angle of inclination (11).
15. A strip steel punching tool according to claim 14 characterised in that the remaining surface (19) which is free from the V-shaped recess (18) serves as a contact surface against the strip steel punching blade (3).
16. A strip steel punching tool according to claim 14 or claim 15 characterised in that the V-shaped recess (18) has a base angle of 90°, possibly with a rounded configuration.
17. A strip steel punching tool according to one of claims 14 to 16 characterised in that the side surface (17) which faces away from the strip steel punching blade (3) extends parallel to the side surface (10) of the V-shaped recess (18).
18. A strip steel punching tool according to claim 3 characterised in that recesses (21) are provided in the support region of the profile strip (7) to reduce the hardness of the remaining cross-section (15ʹ) (Figure 5).
EP87111424A 1986-09-05 1987-08-07 Strip steel punch tool with resilient profiled strips Expired - Lifetime EP0263258B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111424T ATE60537T1 (en) 1986-09-05 1987-08-07 STRIP STEEL PUNCHING TOOL WITH ELASTIC PROFILE STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630287A DE3630287C1 (en) 1986-09-05 1986-09-05 Steel band punching tool with elastic profile strip
DE3630287 1986-09-05

Publications (3)

Publication Number Publication Date
EP0263258A2 EP0263258A2 (en) 1988-04-13
EP0263258A3 EP0263258A3 (en) 1988-09-14
EP0263258B1 true EP0263258B1 (en) 1991-01-30

Family

ID=6309001

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111424A Expired - Lifetime EP0263258B1 (en) 1986-09-05 1987-08-07 Strip steel punch tool with resilient profiled strips

Country Status (6)

Country Link
EP (1) EP0263258B1 (en)
AT (1) ATE60537T1 (en)
DE (1) DE3630287C1 (en)
DK (1) DK166662B1 (en)
FI (1) FI85236C (en)
NO (1) NO167639C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9000560U1 (en) * 1990-01-19 1990-03-01 Karl Linhardt GmbH, 8501 Dietenhofen Hole punch for web material
DE9303159U1 (en) * 1993-02-11 1993-08-05 Karl Marbach GmbH + Co, 74080 Heilbronn Strip steel punching tool with hold-down device
DE4304030A1 (en) * 1993-02-11 1994-08-18 Marbach Gmbh Karl Steel band punching tool with holding-down device
DE29604627U1 (en) * 1996-03-13 1996-05-09 Prügel, Johann, 86757 Wallerstein Punching tool
US8042442B2 (en) 2002-08-01 2011-10-25 Bayerische Motoren Werke Aktiengesellschaft Cutting tool
DE10235185A1 (en) * 2002-08-01 2004-02-19 Bayerische Motoren Werke Ag cutting equipment
DE102005062404A1 (en) * 2005-12-23 2007-06-28 Cfs Germany Gmbh Tool for cutting packaging bands has fitting strip for screwing to base plate with inclined surface that interacts with that of clamping rail with holding strip that interacts with blade by friction, presses it against base plate
ITFI20060342A1 (en) * 2006-12-29 2008-06-30 Foldyn S R L EQUIPMENT AND DEVICE FOR DIE-RUBBERING.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364357A (en) * 1963-07-23 1964-06-19 Device for the preparation of stamping and grooving forms, for machines or apparatus simultaneously carrying out stamping and grooving of cardboard boxes, or the like
US3288007A (en) * 1964-10-05 1966-11-29 Eda Masumi Paper holding apparatus for cutting cylinder in a rolling press
US3277756A (en) * 1965-04-22 1966-10-11 Donnelley & Sons Co Rotary web cutter and stripper assembly
US3803963A (en) * 1971-10-20 1974-04-16 Int Paper Co Cutter with stripper
DE2610628C3 (en) * 1976-03-13 1979-09-27 Dornier Gmbh, 7990 Friedrichshafen Device for cutting out plate-shaped core materials for sandwich components
DE3135021A1 (en) * 1981-09-04 1983-03-31 Georg 5372 Schleiden Uhlmann Device for punching out blanks made of cardboard, paperboard and the like
DE3135980C1 (en) * 1981-09-11 1983-06-01 Karl Marbach Gmbh & Co, 7100 Heilbronn Strip steel punching tool with at least one strip-shaped punching blade having a cutting edge
FI833476A (en) * 1982-10-01 1984-04-02 Stewart & Sons Wm R SKAERANORDNING

Also Published As

Publication number Publication date
EP0263258A2 (en) 1988-04-13
DK166662B1 (en) 1993-06-28
NO167639C (en) 1991-11-27
NO873707D0 (en) 1987-09-04
EP0263258A3 (en) 1988-09-14
ATE60537T1 (en) 1991-02-15
FI873490A0 (en) 1987-08-11
DE3630287C1 (en) 1993-06-24
FI85236C (en) 1992-03-25
NO873707L (en) 1988-03-07
FI873490A (en) 1988-03-06
FI85236B (en) 1991-12-13
DK431487D0 (en) 1987-08-19
NO167639B (en) 1991-08-19
DK431487A (en) 1988-03-06

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