EP1960165B1 - Device for cutting a break line into a film - Google Patents

Device for cutting a break line into a film Download PDF

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Publication number
EP1960165B1
EP1960165B1 EP06805763A EP06805763A EP1960165B1 EP 1960165 B1 EP1960165 B1 EP 1960165B1 EP 06805763 A EP06805763 A EP 06805763A EP 06805763 A EP06805763 A EP 06805763A EP 1960165 B1 EP1960165 B1 EP 1960165B1
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EP
European Patent Office
Prior art keywords
blade
holder
groove
channel
tip
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.)
Not-in-force
Application number
EP06805763A
Other languages
German (de)
French (fr)
Other versions
EP1960165A2 (en
Inventor
Christoph Pekal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frimo Group GmbH
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Frimo Group GmbH
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Filing date
Publication date
Application filed by Frimo Group GmbH filed Critical Frimo Group GmbH
Publication of EP1960165A2 publication Critical patent/EP1960165A2/en
Application granted granted Critical
Publication of EP1960165B1 publication Critical patent/EP1960165B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members 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
    • B26D7/27—Means for performing other operations combined with cutting
    • B26D7/34—Means for performing other operations combined with cutting for applying a coating, such as butter, to cut product
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0033—Cutting members therefor assembled from multiple blades
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/004—Cutting members therefor not rotating
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • 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
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member

Definitions

  • the invention relates to a device for cutting a line of weakness into a film, comprising a blade with a blade tip pointing in the cutting direction, which is bounded by three intersecting wedge surfaces, a blade holder and a channel for supplying a liquid behind the blade tip in the line of weakness.
  • the liquid may be a release agent which is introduced into the parting line in order to prevent sticking of the parting surfaces delimiting the parting line with subsequent intumescence of the film with an intregral foam.
  • Such a device is from the DE PS 102004009351 known.
  • the blade consists of carbide or HSS steel. She is of a very close Drilled hole for the liquid, which ends at a distance of less than 0.8 mm, advantageously less than 0.45 mm behind the blade tip. Due to the high hardness of the materials required to make the blade, it is extremely costly and difficult to create the bore and place it with the required accuracy.
  • the invention is based on the object to further develop such a device that reduces the cost of manufacturing the blade while avoiding a loss of quality.
  • the blade holder supports the blade at the end facing away from the cutting direction in the region of the blade tip at at least one support point, that the blade holder is penetrated by a channel opening into the support point for the liquid and that the blade, starting from the mouth of the channel, provided with an open groove, which ends in a downward direction towards the blade tip.
  • the tool holder is made of a soft material compared to the blade, for example tool steel, the creation of the closed channel is very simple. There is the particular advantage that much more space is available in the tool holder than in the blade, which allows the diameter compared to the prior art, but at least in the rearward areas, to increase significantly. The production and the supply of the liquid are thereby greatly simplified.
  • the continuation of the channel consists of a rearwardly and downwardly open groove, which can be easily produced by grinding in the required quality. Since the groove is located during the intended use substantially between the flank surfaces of the parting line produced by the blade, there is no difficulty to supply the liquid to the groove bottom in the required dosage.
  • the groove expediently ends immediately behind the blade tip. Because it is in the visible range along the entire length of its manufacture, its production by grinding or milling is extremely simple.
  • the groove has a triangular in the rearward and downward open profile. This ensures a particularly good self-cleaning.
  • the groove expediently runs flush behind the blade tip in order to ensure optimal support of the blade tip and optimum wetting of the flank surfaces and the groove bottom of the parting line through the liquid.
  • the blade is suitably made of carbide. It is therefore particularly durable. Other hard materials can also be used to make them. Since a removal of essential material components in the manufacture of the blade from the commercially available semi-finished products of parallelepiped shape largely unnecessary, also results in a material savings, which is under Costs of significant advantage. The production can be carried out very quickly using grinding and / or milling processes.
  • the blade is expediently received in an at least partially open in the cutting direction groove of the tool holder and can be fixed therein by means of a clamping screw.
  • the blade is provided with a recess for clamping in the tool holder, in which the clamping screw can be inserted.
  • the recess of hollow conical or wedge-shaped inwardly tapered shape and, relative to the imaginary extension of the central axis of the clamping screw, displaced relative to the blade tip mounted when the blade is pressed against your stop.
  • the blade tip When replacing a blunt blade with a new one, therefore, the blade tip always takes the same assignment to the blade holder, without the need for time-consuming adjustments.
  • the clamping screw can also be replaced by a quick-release device.
  • the clamping screw is appropriate, based on the longitudinal direction of the groove to be generated and the blade, arranged centrally to prevent jamming or transverse loads.
  • the blade holder expediently consists of tool steel. It can be easily manufactured in the required accuracy and equipped with a blade.
  • the advantages achieved by the invention consist in a particularly cost-effective manufacturability of a usable unit from the blade and a customized tool holder. A modular training and use is easily possible.
  • the device shown serves for cutting a line of weakness in a film, comprising a blade 1 with a blade tip 2 pointing in the cutting direction, which is formed by three intersecting wedge surfaces 3, 4, 5 (FIG. Fig. 3 ) is limited, a blade holder 6 and a channel 7 for supplying a liquid, preferably a release agent, to the blade 1 behind the blade tip 2 in the line of weakness, for example, a release agent.
  • a liquid preferably a release agent
  • the supply of the liquid to the channel 7 takes place through a hose 11 of conventional diameter, which is usually connected to a metering pump, not shown in the drawing.
  • the blade 1 is fixed in a blade holder 6 so that the blade 1 is supported on the blade holder 6 at the end facing away from the cutting direction in the region of the blade tip 2 at at least one support point 8.
  • the blade holder 6 is penetrated by an opening in the support point 8 channel 7 for the liquid, wherein the blade 1, starting from the mouth of the channel 7, is provided with an open groove 9, which ends downwards and towards the blade tip 2 preferred ,
  • the support point which has a planar design and seals against the blade 1 in these areas, closes off the channel in a liquid-tight manner.
  • no release agent can reach into areas outside of the parting line produced by the blade during cutting.
  • Fig. 2 shows the Zudix the mouth of the channel 7 to the inlet opening of the groove in a view obliquely from behind. Since it is located outside the parting line created by the blade, there are no problems in choosing the diameter as well as the required robustness and ease of manufacture. Within the holder 1, the channel 7 forming hole is narrowed, especially in the region of the mouth to the width of the groove. This avoids that liquid exits laterally or upward above the parting line generated by the blade 1 and dirty the surface of the processed film.
  • the blade 1 is made of hard metal and is accordingly extremely resistant to wear. It can by mechanical processing of a semi-finished product of cuboid blank ( Fig. 3 ), for example, by a grinding and / or milling process.
  • Fig. 4 shows that the groove ends flush with the surface immediately behind the blade tip. This avoids an unnecessary weakening of the cross section of the blade in the region of the blade tip and ensures a uniform wetting of the flank surfaces, not shown, of the parting line produced by the blade during the intended use.
  • the groove 9 has a substantially triangular in the rearward and downward open profile and is thus pollution-proof. It is generated by a grinding process.
  • the blade 1 is received in a partially open in the cutting direction groove of the tool holder 6 and fixed therein by means of a clamping screw 12.
  • the clamping screw 12 consists of a conically pointed grub screw, which in a triangular recess 10 (FIG. Fig. 3 ) engages the front of the blade 1 and determines the blade 1 in a precisely predetermined position in the blade holder 6 and at the same time presses sealingly against the mouth of the support 7 surrounding the channel 7.
  • the deepest point of the recess is for this purpose, based on the imaginary extension of the clamping screw 12, displaced by 0.5 to 2 mm in the direction of the blade tip 2 and mounted centrally.
  • Tightening the clamping screw 12 thereby causes not only a firm contact pressure of the blade 1 to its facing away from the cutting direction storage in the blade holder 6 and in particular a sealing contact with the support point 8 but also a Relatiwerschiebung the blade 1 in the blade holder 6 in the direction of its upper end against a there fancied, further stop the blade holder. 6
  • the blade 1 thereby assumes when tightening the clamping screw 12 again and again an exactly predictable, unverkantete assignment to the blade holder 6 a. The replacement of a worn blade 1 is therefore easily possible after previous release of the clamping screw 12, without the need for a renewed adjustment.
  • the clamping screw 12 by tightening the clamping screw 12, a seal of the groove 9 secured in the lateral direction and upwards in the region of the support point 8, whereby no unwanted liquid reaches the upwardly facing inside of the film to be cut. If necessary, the clamping screw 12 can also be replaced by a quick-action clamping device of similar effectiveness.
  • the film can be made of any of the materials used, for example, PVC, PU or the like. It is generally provided on the visible side with a decorative surface graining.
  • the blade holder 6 is made of tempered tool steel. It can be easily edited and used modularly after having been equipped with a blade 1.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Details Of Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

The foil cutting device includes a blade (1) with tip (2) pointing in the cutting direction, bounded by three wedge surfaces; a blade holder (6) and a fluid supply channel. The holder supports the blade at the end facing away from the cutting direction in the region of the tip at one or more support points (8). It is pierced by a fluid channel (7) coming out at the support point. There is an open downward groove from the channel end running towards the tip.

Description

Die Erfindung betrifft eine Vorrichtung zum Einschneiden einer Schwächungslinie in eine Folie, umfassend eine Klinge mit einer in Schnittrichtung zeigenden Klingenspitze, die durch drei einander durchschneidende Keilflächen begrenzt ist, einen Klingenhalter und einen Kanal zur Zuführung einer Flüssigkeit hinter der Klingenspitze in die Schwächungslinie. Bei der Flüssigkeit kann es sich um ein Trennmittel handeln, das in die Trennfuge eingeführt wird, um ein Verkleben der die Trennfuge begrenzenden Flankenflächen bei einer nachträglichen Hinterschäumung der Folie mit einem Intregralschaum zu verhindern.The invention relates to a device for cutting a line of weakness into a film, comprising a blade with a blade tip pointing in the cutting direction, which is bounded by three intersecting wedge surfaces, a blade holder and a channel for supplying a liquid behind the blade tip in the line of weakness. The liquid may be a release agent which is introduced into the parting line in order to prevent sticking of the parting surfaces delimiting the parting line with subsequent intumescence of the film with an intregral foam.

Stand der TechnikState of the art

Eine solche Vorrichtung ist aus der DE PS 102004009351 bekannt. Die Klinge besteht dabei aus Hartmetall oder HSS - Stahl. Sie ist von einer sehr engen Bohrung für die Flüssigkeit durchdrungen, die in einem Abstand von weniger als 0,8 mm, vorteilhaft weniger als 0,45 mm hinter der Klingenspitze endet. Bedingt durch die große Härte der zur Herstellung der Klinge erforderlichen Werkstoffe ist es äußerst kostspielig und schwierig, die Bohrung zu erzeugen und mit der erforderlichen Genauigkeit zu platzieren.Such a device is from the DE PS 102004009351 known. The blade consists of carbide or HSS steel. She is of a very close Drilled hole for the liquid, which ends at a distance of less than 0.8 mm, advantageously less than 0.45 mm behind the blade tip. Due to the high hardness of the materials required to make the blade, it is extremely costly and difficult to create the bore and place it with the required accuracy.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zu Grunde, eine solche Vorrichtung derart weiter zu entwickeln, dass sich die Herstellung der Klinge unter Vermeidung einer Qualitätseinbuße verbilligt.The invention is based on the object to further develop such a device that reduces the cost of manufacturing the blade while avoiding a loss of quality.

Diese Aufgabe wird erfindungsgemäß bei einer Vorrichtung der eingangs genannten Art mit den kennzeichnenden Merkmalen von Anspruch 1 gelöst. Auf vorteilhafte Ausgestaltungen nehmen die Unteransprüche Bezug.This object is achieved with a device of the type mentioned above with the characterizing features of claim 1. In advantageous embodiments, the dependent claims relate.

Bei der erfindungsgemäßen Vorrichtung ist es vorgesehen, dass der Klingenhalter die Klinge an dem von der Schnittrichtung abgewandten Ende im Bereich der Klingenspitze an zumindest einer Abstützstelle abstützt, dass der Klingenhalter von einem in der Abstützstelle mündenden Kanal für die Flüssigkeit durchdrungen ist und dass die Klinge, ausgehend von der Mündung des Kanals, mit einer offenen Nut versehen ist, die nach unten in Richtung der Klingenspitze vorgezogen endet.In the device according to the invention, it is provided that the blade holder supports the blade at the end facing away from the cutting direction in the region of the blade tip at at least one support point, that the blade holder is penetrated by a channel opening into the support point for the liquid and that the blade, starting from the mouth of the channel, provided with an open groove, which ends in a downward direction towards the blade tip.

Da der Werkzeughalter im Vergleich zur Klinge aus einem weichen Material besteht, beispielweise aus Werkzeugstahl, ist die Erzeugung des geschlossenen Kanals sehr einfach. Dabei besteht der besondere Vorteil, dass in dem Werkzeughalter wesentlich mehr Raum verfügbar ist als in der Klinge, was es ermöglicht, den Durchmesser im Vergleich zum Stand der Technik, zumindest aber in den rückwärtigen Bereichen, erheblich zu vergrößern. Die Herstellung und die Einspeisung der Flüssigkeit sind dadurch stark vereinfacht.Since the tool holder is made of a soft material compared to the blade, for example tool steel, the creation of the closed channel is very simple. There is the particular advantage that much more space is available in the tool holder than in the blade, which allows the diameter compared to the prior art, but at least in the rearward areas, to increase significantly. The production and the supply of the liquid are thereby greatly simplified.

Auf der Seite der Klinge besteht die Fortsetzung des Kanals aus einer in rückwärtiger Richtung und nach unten offenen Nut, die durch Einschleifen leicht in der erforderlichen Qualität erzeugbar ist. Da sich die Nut während der bestimmungsgemäßen Verwendung im wesentlichen zwischen den Flankenflächen der durch die Klinge erzeugten Trennfuge befindet, besteht keine Schwierigkeit, die Flüssigkeit dem Nutgrund in der erforderlichen Dosierung zuzuführen.On the side of the blade, the continuation of the channel consists of a rearwardly and downwardly open groove, which can be easily produced by grinding in the required quality. Since the groove is located during the intended use substantially between the flank surfaces of the parting line produced by the blade, there is no difficulty to supply the liquid to the groove bottom in the required dosage.

Die Nut endet zweckmäßig unmittelbar hinter der Klingenspitze. Da sie sich bei der Herstellung auf der ganzen Länge im sichtbaren Bereich befindet, ist ihre Erzeugung durch Schleifen oder Fräsen denkbar einfach.The groove expediently ends immediately behind the blade tip. Because it is in the visible range along the entire length of its manufacture, its production by grinding or milling is extremely simple.

Nach einer vorteilhaften Ausgestaltung ist es vorgesehen, dass die Nut ein dreieckig in rückwärtiger Richtung und nach unten geöffnetes Profil hat. Hierdurch ist eine besonders gute Selbstreinigung gewährleistet.According to an advantageous embodiment, it is provided that the groove has a triangular in the rearward and downward open profile. This ensures a particularly good self-cleaning.

Die Nut läuft zweckmäßig hinter der Klingenspitze oberflächenbündig aus, um eine optimale Abstützung der Klingenspitze und eine optimale Benetzung der Flankenflächen und des Nutgrundes der Trennfuge durch die Flüssigkeit zu gewährleisten.The groove expediently runs flush behind the blade tip in order to ensure optimal support of the blade tip and optimum wetting of the flank surfaces and the groove bottom of the parting line through the liquid.

Die Klinge besteht zweckmäßig aus Hartmetall. Sie ist dadurch besonders dauerhaft. Andere Hartwerkstoffe können zu ihrer Herstellung ebenfalls verwendet werden. Da sich ein Entfernen von wesentlichen Werkstoffbestandteilen bei der Herstellung der Klinge aus den im Handel erhältlichen Halbfertigfabrikaten von quaderförmiger Gestalt weitgehend erübrigt, ergibt sich auch eine Werkstoffersparnis, was unter Kostengesichtspunkten von wesentlichem Vorteil ist. Die Fertigung kann unter Anwendung von Schleif- und/oder Fräsprozessen sehr zügig erfolgen.The blade is suitably made of carbide. It is therefore particularly durable. Other hard materials can also be used to make them. Since a removal of essential material components in the manufacture of the blade from the commercially available semi-finished products of parallelepiped shape largely unnecessary, also results in a material savings, which is under Costs of significant advantage. The production can be carried out very quickly using grinding and / or milling processes.

Die Klinge ist zweckmäßig in einer zumindest teilweise in Schnittrichtung offenen Nut des Werkzeughalters aufgenommen und darin mittels einer Klemmschraube festlegbar.The blade is expediently received in an at least partially open in the cutting direction groove of the tool holder and can be fixed therein by means of a clamping screw.

Bei einer standardisierten Ausbildung der Klinge hat es sich als vorteilhaft bewährt, wenn die Klinge mit einer Eintiefung zur Klemmung in dem Werkzeughalter versehen ist, in die die Klemmschraube einfügbar ist. Zweckmäßig ist die Eintiefung von hohlkegeliger oder keilförmig nach innen verjüngten Gestalt und, bezogen auf die gedachte Verlängerung der Mittelachse der Klemmschraube, relativ in Richtung der Klingespitze verlagert angebracht, wenn die Klinge an Ihren Anschlag angepresst ist. Dadurch wird beim Anziehen der Klemmschraube eine Kraft auf die Klinge ausgeübt, die sie nicht nur dichtend auf die Mündung des Kanals für das Trennmittel drückt sondern die zusätzlich versucht, sie auf dem Anschlag in Richtung ihres oberen Endes zu verschieben, bis ein dort angebrachter, weiterer Anschlag durch das obere Ende der Klinge erreicht ist. Beim Ersatz einer stumpfen Klinge durch eine neue nimmt die Klingenspitze daher immer wieder dieselbe Zuordnung zum Klingenhalter ein, ohne dass es aufwändiger Justierarbeiten bedarf. Natürlich kann die Klemmschraube bei Bedarf auch durch eine Schnellspannvorrichtung ersetzt sein. Die Klemmschraube ist zweckmäßig, bezogen auf die Längsrichtung der zu erzeugenden Nut sowie die Klinge, mittig angeordnet, um eine Verkantung oder Querbelastungen zu verhindern.In a standardized design of the blade, it has proven to be advantageous if the blade is provided with a recess for clamping in the tool holder, in which the clamping screw can be inserted. Suitably, the recess of hollow conical or wedge-shaped inwardly tapered shape and, relative to the imaginary extension of the central axis of the clamping screw, displaced relative to the blade tip mounted when the blade is pressed against your stop. As a result, a force is exerted on the blade when tightening the clamping screw, which presses them not only sealingly on the mouth of the channel for the release agent but also tries to move it on the stop in the direction of its upper end until a more appropriate there, another Stop is reached through the top of the blade. When replacing a blunt blade with a new one, therefore, the blade tip always takes the same assignment to the blade holder, without the need for time-consuming adjustments. Of course, if necessary, the clamping screw can also be replaced by a quick-release device. The clamping screw is appropriate, based on the longitudinal direction of the groove to be generated and the blade, arranged centrally to prevent jamming or transverse loads.

Der Klingenhalter besteht zweckmäßig aus Werkzeugstahl. Er lässt sich dadurch leicht in der erforderlichen Genauigkeit herstellen und mit einer Klinge bestücken.The blade holder expediently consists of tool steel. It can be easily manufactured in the required accuracy and equipped with a blade.

Die mit der Erfindung erzielten Vorteile bestehen in einer besonders kostengünstigen Herstellbarkeit einer gebrauchsfähigen Einheit aus der Klinge und einem angepassten Werkzeughalter. Eine modulartige Ausbildung und Verwendung ist problemlos möglich.The advantages achieved by the invention consist in a particularly cost-effective manufacturability of a usable unit from the blade and a customized tool holder. A modular training and use is easily possible.

Die Erfindung wird nachfolgend an Hand der Zeichnung weiter verdeutlicht. Es zeigen:

Fig. 1:
einen gebrauchsfertigen Modul, umfassend eine in einen Klingenhalter eingesetzte Klinge in teilweise aufgeschnittener Ansicht
Fig. 2:
die Zuordnung der Mündung des Kanals zu der Eintrittsöffnung der Nut in perspektivischer Darstellung
Fig. 3:
eine beispielhafte Klinge in einer perspektivischen Ansicht schräg von oben
Fig. 4:
eine beispielhafte Klinge in einer perspektivischen Ansicht schräg von unten
The invention will be further clarified below with reference to the drawing. Show it:
Fig. 1:
a ready-made module comprising a blade inserted into a blade holder in a partially cutaway view
Fig. 2:
the assignment of the mouth of the channel to the inlet opening of the groove in a perspective view
3:
an exemplary blade in a perspective view obliquely from above
4:
an exemplary blade in a perspective view obliquely from below

Kurzbeschreibung der ZeichnungBrief description of the drawing

Die in Fig. 1 gezeigte Vorrichtung dient zum Einschneiden einer Schwächungslinie in einer Folie, umfassend eine Klinge 1 mit einer in Schnittrichtung zeigenden Klingenspitze 2, die durch drei einander durchschneidende Keilflächen 3, 4, 5 (Fig. 3) begrenzt ist, einen Klingenhalter 6 und einen Kanal 7 zur Zuführung einer Flüssigkeit, bevorzugt eines Trennmittels, zur Klinge 1 hinter der Klingenspitze 2 in die Schwächungslinie, beispielsweise eines Trennmittels. Die Zuführung der Flüssigkeit zu dem Kanal 7 erfolgt durch eine Schlauchleitung 11 gebräuchlichen Durchmessers, die gewöhnlich an eine in der Zeichnung nicht dargestellte Dosierpumpe angeschlossen ist.In the Fig. 1 The device shown serves for cutting a line of weakness in a film, comprising a blade 1 with a blade tip 2 pointing in the cutting direction, which is formed by three intersecting wedge surfaces 3, 4, 5 (FIG. Fig. 3 ) is limited, a blade holder 6 and a channel 7 for supplying a liquid, preferably a release agent, to the blade 1 behind the blade tip 2 in the line of weakness, for example, a release agent. The supply of the liquid to the channel 7 takes place through a hose 11 of conventional diameter, which is usually connected to a metering pump, not shown in the drawing.

Dazu ist die Klinge 1 in einem Klingenhalter 6 so festgelegt, dass die Klinge 1 an dem von der Schnittrichtung abgewandten Ende im Bereich der Klingenspitze 2 an zumindest einer Abstützstelle 8 an dem Klingenhalter 6 abgestützt ist. Der Klingenhalter 6 ist von einem in der Abstützstelle 8 mündenden Kanal 7 für die Flüssigkeit durchdrungen, wobei die Klinge 1, ausgehend von der Mündung des Kanals 7, mit einer offenen Nut 9 versehen ist, die nach unten und in Richtung der Klingenspitze 2 vorgezogen endet. In seitlicher Richtung und nach oben schließt die Abstützstelle, die flächig ausgebildet ist und in diesen Bereichen dichtend an der Klinge 1 anliegt, den Kanal flüssigkeitsdicht ab. Dadurch kann kein Trennmittel in Bereiche außerhalb der beim Einschneiden von der Klinge erzeugten Trennfuge gelangen.For this purpose, the blade 1 is fixed in a blade holder 6 so that the blade 1 is supported on the blade holder 6 at the end facing away from the cutting direction in the region of the blade tip 2 at at least one support point 8. The blade holder 6 is penetrated by an opening in the support point 8 channel 7 for the liquid, wherein the blade 1, starting from the mouth of the channel 7, is provided with an open groove 9, which ends downwards and towards the blade tip 2 preferred , In the lateral direction and upwards, the support point, which has a planar design and seals against the blade 1 in these areas, closes off the channel in a liquid-tight manner. As a result, no release agent can reach into areas outside of the parting line produced by the blade during cutting.

Fig. 2 zeigt die Zudordnung der Mündung des Kanals 7 zu der Eintrittsöffnung der Nut in einer Ansicht schräg von hinten. Da sie sich außerhalb der durch die Klinge erzeugten Trennfuge befindet, bestehen keine Probleme, die Durchmesser so zu wählen, wie für die erforderliche Robustheit und eine einfache Herstellung von Vorteil. Innerhalb des Halters 1 ist die den Kanal 7 bildende Bohrung vor allem im Bereich der Mündung auf die Weite der Nut verengt. Dadurch wird vermieden, dass Flüssigkeit oberhalb der von der Klinge 1 erzeugten Trennfuge seitlich oder nach oben austritt und die Oberfläche der bearbeiteten Folie verschmutzt. Solche Verschmutzungen zu vermeiden ist äußerst wichtig, weil das Trennmittel nur schwierig von der Folie zu entfernen ist und eine Blasenbildung verursachen könnte, wenn beim späteren Hinterschäumen der Folie mit einem Reaktionsschaum eine feste, adhäsive Bindung zwischen der Folie und dem durch das Hinterschäumen erzeugten Schaumstoffkörper angestrebt wird. Fig. 2 shows the Zudordnung the mouth of the channel 7 to the inlet opening of the groove in a view obliquely from behind. Since it is located outside the parting line created by the blade, there are no problems in choosing the diameter as well as the required robustness and ease of manufacture. Within the holder 1, the channel 7 forming hole is narrowed, especially in the region of the mouth to the width of the groove. This avoids that liquid exits laterally or upward above the parting line generated by the blade 1 and dirty the surface of the processed film. Avoiding such soiling is extremely important because the release agent is difficult to remove from the film and could cause blistering if, on later re-foaming the film with a reaction foam, a firm, adhesive bond is sought between the film and the foam body produced by the foam backing.

Die Klinge 1 besteht aus Hartmetall und ist demgemäss äußerst verschleißbeständig. Sie kann durch mechanische Bearbeitung eines Halbfertigproduktes von quaderförmigem Zuschnitt (Fig. 3) erhalten werden, beispielsweise durch einen Schleif- und/oder Fräsprozess.The blade 1 is made of hard metal and is accordingly extremely resistant to wear. It can by mechanical processing of a semi-finished product of cuboid blank ( Fig. 3 ), for example, by a grinding and / or milling process.

Fig. 4 zeigt, dass die Nut unmittelbar hinter der Klingenspitze oberflächenbündig endet. Dadurch wird eine unnötige Schwächung des Querschnittes der Klinge im Bereich der Klingenspitze vermieden und eine gleichmäßige Benetzung der nicht gezeigten Flankenflächen der durch die Klinge während der bestimmungsgemäßen Verwendung erzeugten Trennfuge gewährleistet. Fig. 4 shows that the groove ends flush with the surface immediately behind the blade tip. This avoids an unnecessary weakening of the cross section of the blade in the region of the blade tip and ensures a uniform wetting of the flank surfaces, not shown, of the parting line produced by the blade during the intended use.

Die Nut 9 hat ein im wesentlichen dreieckig in rückwärtiger Richtung und nach unten geöffnetes Profil und ist dadurch verschmutzungssicher. Sie ist durch einen Schleifprozess erzeugt.The groove 9 has a substantially triangular in the rearward and downward open profile and is thus pollution-proof. It is generated by a grinding process.

Die Klinge 1 ist in einer teilweise in Schnittrichtung offenen Nut des Werkzeughalters 6 aufgenommen und darin mittels einer Klemmschraube 12 festgelegt. Die Klemmschraube 12 besteht aus einer kegelig zugespitzten Madenschraube, die in eine dreieckige Ausnehmung 10 (Fig. 3) der Vorderseite der Klinge 1 eingreift und die Klinge 1 in einer genau vorherbestimmten Position in dem Klingenhalter 6 festlegt und zugleich dichtend an den die Mündung der den Kanal 7 umgebenden Abstützstelle 8 anpresst. Die tiefste Stelle der Ausnehmung ist zu diesem Zweck, bezogen auf die gedachte Verlängerung der Klemmschraube 12, um 0,5 bis 2 mm in Richtung der Klingenspitze 2 verlagert und mittig angebracht. Ein Anziehen der Klemmschraube 12 bewirkt dadurch nicht nur eine feste Anpressung der Klinge 1 an Ihre von der Schnittrichtung abgewandte Lagerung in dem Klingenhalter 6 und insbesondere eine dichtende Anpressung an dessen Abstützstelle 8. sondern darüber hinaus eine Relatiwerschiebung der Klinge 1 in dem Klingenhalter 6 in Richtung ihres oberen Endes gegen einen dort angebachten, weiteren Anschlag des Klingenhalters 6. Die Klinge 1 nimmt dadurch beim Anziehen der Klemmschraube 12 immer wieder eine exakt vorherbestimmbare, unverkantete Zuordnung zu dem Klingenhalter 6 ein. Der Austausch einer verschlissenen Klinge 1 ist daher nach vorausgegangenem Lösen der Klemmschraube 12 problemlos möglich, ohne dass es einer erneuten Justierung bedarf. Außerdem ist durch das Anziehen der Klemmschraube 12 eine Abdichtung der Nut 9 in seitlicher Richtung und nach oben im Bereich der Abstützstelle 8 gesichert, wodurch keine unerwünschte Flüssigkeit auf die nach oben zeigende Innenseite der einzuschneidenden Folie gelangt. Die Klemmschraube 12 kann bedarfsweise auch durch eine Schnellspanneinrichtung von ähnlicher Wirksamkeit ersetzt sein.The blade 1 is received in a partially open in the cutting direction groove of the tool holder 6 and fixed therein by means of a clamping screw 12. The clamping screw 12 consists of a conically pointed grub screw, which in a triangular recess 10 (FIG. Fig. 3 ) engages the front of the blade 1 and determines the blade 1 in a precisely predetermined position in the blade holder 6 and at the same time presses sealingly against the mouth of the support 7 surrounding the channel 7. The deepest point of the recess is for this purpose, based on the imaginary extension of the clamping screw 12, displaced by 0.5 to 2 mm in the direction of the blade tip 2 and mounted centrally. Tightening the clamping screw 12 thereby causes not only a firm contact pressure of the blade 1 to its facing away from the cutting direction storage in the blade holder 6 and in particular a sealing contact with the support point 8 but also a Relatiwerschiebung the blade 1 in the blade holder 6 in the direction of its upper end against a there fancied, further stop the blade holder. 6 The blade 1 thereby assumes when tightening the clamping screw 12 again and again an exactly predictable, unverkantete assignment to the blade holder 6 a. The replacement of a worn blade 1 is therefore easily possible after previous release of the clamping screw 12, without the need for a renewed adjustment. In addition, by tightening the clamping screw 12, a seal of the groove 9 secured in the lateral direction and upwards in the region of the support point 8, whereby no unwanted liquid reaches the upwardly facing inside of the film to be cut. If necessary, the clamping screw 12 can also be replaced by a quick-action clamping device of similar effectiveness.

Die Folie kann aus irgend einem der einschlägig verwendeten Werkstoffe bestehen, beispielsweise aus PVC, PU oder ähnlichem. Sie ist im allgemeinen auf der Sichtseite mit einer dekorativen Oberflächennarbung versehen.The film can be made of any of the materials used, for example, PVC, PU or the like. It is generally provided on the visible side with a decorative surface graining.

Der Klingenhalter 6 besteht aus vergütetem Werkzeugstahl. Er lässt sich dadurch leicht bearbeiten und nach vorausgegangener Bestückung mit einer Klinge 1 modulartig verwenden.The blade holder 6 is made of tempered tool steel. It can be easily edited and used modularly after having been equipped with a blade 1.

Claims (9)

  1. Device for cutting a weakening line in a film comprising a blade (1) having a blade tip (2) which points in the cutting direction and which is defined by three mutually intersecting wedge surfaces (3, 4, 5), a blade holder (6) and a channel (7) for the delivery of a liquid behind the blade tip (2) to the weakening line, characterised in that the blade holder (6) supports the blade (1) at the end facing away from the cutting direction in the region of the blade tip (2) at at least one supporting point (8), in that through the blade holder (6) passes a channel (7) for the liquid opening out at the supporting point (8), and in that the blade (1), starting from the opening of the channel (7), is provided with an open groove (9) which ends advanced downwards and in the direction of the blade tip (2).
  2. Device according to claim 1, characterised in that the groove (9) ends immediately behind the blade tip (2).
  3. Device according to claim 1 or 2, characterised in that the groove (9) has a profile which opens triangularly in a rearward direction and rearwards and downwards.
  4. Device according to any of claims 1 to 3, characterised in that the groove (9) ends flush with the surface behind the blade tip (2).
  5. Device according to any of claims 1 to 4, characterised in that the blade (1) is made of hard metal.
  6. Device according to any of claims 1 to 5, characterised in that the blade holder (6) is made of high-speed steel.
  7. Device according to any of claims 1 to 6, characterised in that the blade (1) is held in a groove in the tool holder (6) at least partially open in the cutting direction and can be fixed therein by means of a clamping screw (12).
  8. Device according to claim 7, characterised in that the blade (1) can be applied with the upper end to a stop of the tool holder (6) and has a wedge-shaped or conical depression (10) for clamping in which a clamping screw (12) can be inserted, and in that an imaginary extension of the centre axis of the clamping screw (12) centrally intersects the depression above its lowermost point in order to cause the blade (1) to be pressed against the stop.
  9. Device according to any of claims 1 to 8, characterised in that the tool holder (6) forms part of a quick-change tool.
EP06805763A 2005-10-21 2006-09-19 Device for cutting a break line into a film Not-in-force EP1960165B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005050940A DE102005050940B3 (en) 2005-10-21 2005-10-21 Foil cutting device for cutting along weakened line has blade holder supporting blades at end facing away from cutting direction in region of blade tip
PCT/EP2006/009077 WO2007045317A2 (en) 2005-10-21 2006-09-19 Device for cutting a break line into a film

Publications (2)

Publication Number Publication Date
EP1960165A2 EP1960165A2 (en) 2008-08-27
EP1960165B1 true EP1960165B1 (en) 2010-05-19

Family

ID=37440255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06805763A Not-in-force EP1960165B1 (en) 2005-10-21 2006-09-19 Device for cutting a break line into a film

Country Status (5)

Country Link
EP (1) EP1960165B1 (en)
AT (1) ATE468210T1 (en)
DE (2) DE102005050940B3 (en)
IT (1) ITMI20061773A1 (en)
WO (1) WO2007045317A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010000674A1 (en) * 2010-01-05 2011-07-07 FRIMO Group GmbH, 49504 Device for partially severing a workpiece
WO2017206054A1 (en) * 2016-05-31 2017-12-07 Faurecia (China) Holding Co., Ltd. Release agent supply device for cold knife weakening and a cold knife system comprising such a device
DE102016123579A1 (en) 2016-12-06 2018-06-07 Kraussmaffei Technologies Gmbh Method for introducing an application medium into a weakening gap of a cover and preferred application device
CN110421631B (en) * 2019-08-28 2021-05-04 重庆奇分享实业股份有限公司 Bread cutting hand hay cutter body
CN110756349B (en) * 2019-12-25 2020-04-07 沈阳金杯延锋汽车内饰系统有限公司 Cold cutter weakening and release agent spraying integrated device for automobile instrument panel skin
CN112099268B (en) * 2020-09-29 2023-04-18 深圳市隆利科技股份有限公司 Quantum dot film, cutting method thereof and backlight module

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2625702A1 (en) * 1988-01-12 1989-07-13 Lectra Systemes Sa Device for cutting out mats of meltable materials in sheet form
DE20215642U1 (en) * 2002-01-25 2003-02-06 Heidel GmbH & Co. KG Werkzeug- u. Maschinenfabrikation, 41751 Viersen Cutting tool for cutting softer polymers e.g. polyurethane elastomers, has a blade fed with release agent or quality control materials
DE102004009351B3 (en) * 2004-02-26 2005-09-01 Bayerische Motoren Werke Ag Blade, especially for cutting through polyurethane, has a longitudinal drilling through the blade body to take an inserted tube channel for delivery of a barrier agent into the cut to prevent edges sticking together

Also Published As

Publication number Publication date
WO2007045317A2 (en) 2007-04-26
DE102005050940B3 (en) 2006-12-14
ATE468210T1 (en) 2010-06-15
DE502006006998D1 (en) 2010-07-01
ITMI20061773A1 (en) 2007-04-22
WO2007045317A3 (en) 2008-09-18
EP1960165A2 (en) 2008-08-27

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