EP1960165A2 - Device for cutting a break line into a film - Google Patents

Device for cutting a break line into a film

Info

Publication number
EP1960165A2
EP1960165A2 EP06805763A EP06805763A EP1960165A2 EP 1960165 A2 EP1960165 A2 EP 1960165A2 EP 06805763 A EP06805763 A EP 06805763A EP 06805763 A EP06805763 A EP 06805763A EP 1960165 A2 EP1960165 A2 EP 1960165A2
Authority
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.)
Granted
Application number
EP06805763A
Other languages
German (de)
French (fr)
Other versions
EP1960165B1 (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
Original Assignee
Frimo Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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

Links

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 known from DE PS 102004009351.
  • 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 during the bestimmu ⁇ iliaen use substantially between the
  • 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.
  • 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
  • the device shown in Fig. 1 is used 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 bounded by three intersecting wedge surfaces 3, 4, 5 (Fig. 3), a blade holder and a channel 7 for supplying a liquid, preferably a release agent, to the blade 1 behind the blade tip 2 in the weakening line, 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.
  • 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 the film is later foamed with a reaction foam to form a firm, adhesive bond is sought between the film and the foam body produced by the foam backing.
  • the blade 1 is made of hard metal and is accordingly extremely resistant to wear. It can be obtained by mechanical processing of a semi-finished product of cuboidal 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 engages in a triangular recess 10 (Fig. 3) of the front of the blade 1 and the blade 1 defines in a precisely predetermined position in the blade holder 6 and at the same time sealing the mouth of the Channel 7 surrounding support point 8 presses.
  • 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 their 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 ⁇ n the blade holder 6 in the direction of its upper end against a pinned there, further stop the blade holder. 6
  • the blade 1 when tightening the clamping screw 12, the blade 1 repeatedly assumes an exactly predeterminable, non-canting relationship with the blade holder 6. 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, such as PVC 1 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)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Preliminary Treatment Of Fibers (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

Anmelderin: FRIMO Group GmbH, Hansaring 6, 49504 LotteApplicant: FRIMO Group GmbH, Hansaring 6, 49504 Lotte
Vorrichtung zum Einschneiden einer Schwächungslinie in eine FolieDevice for cutting a line of weakness into a film
Beschreibungdescription
Technisches GebietTechnical area
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 known from DE PS 102004009351. 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 bestimmuπgsgemäßen Verwendung im wesentlichen zwischen denOn 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 during the bestimmuπgemäßen use substantially between the
Flankenflächen der durch die Klinge erzeugten Trennfuge befindet, besteht keine Schwierigkeit, die Flüssigkeit dem Nutgrund in der erforderlichen Dosierung zuzuführen.Flank surfaces of the parting line created 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 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 there attached, 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. 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 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.
Die Erfindung wird nachfolgend an Hand der Zeichnung weiter verdeutlicht. Es zeigen:The invention will be further clarified below with reference to the drawing. Show it:
Fig. 1: einen gebrauchsfertigen Modul, umfassend eine in einen Klingenhalter eingesetzte Klinge in teilweise aufgeschnittener AnsichtFig. 1: a ready-made module comprising a blade inserted into a blade holder in a partially cutaway view
Fig. 2: die Zuordnung der Mündung des Kanals zu der Eintrittsöffnung der Nut in perspektivischer DarstellungFig. 2: the assignment of the mouth of the channel to the inlet opening of the groove in a perspective view
Fig. 3: eine beispielhafte Klinge in einer perspektivischen Ansicht schräg von oben3: an exemplary blade in a perspective view obliquely from above
Fig. 4: eine beispielhafte Klinge in einer perspektivischen Ansicht schräg von unten4: 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.The device shown in Fig. 1 is used 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 bounded by three intersecting wedge surfaces 3, 4, 5 (Fig. 3), a blade holder and a channel 7 for supplying a liquid, preferably a release agent, to the blade 1 behind the blade tip 2 in the weakening line, 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 Hinter- schäumen 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 the film is later foamed with a reaction foam to form 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 be obtained by mechanical processing of a semi-finished product of cuboidal 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 \n 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 engages in a triangular recess 10 (Fig. 3) of the front of the blade 1 and the blade 1 defines in a precisely predetermined position in the blade holder 6 and at the same time sealing the mouth of the Channel 7 surrounding support point 8 presses. 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 their 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 \ n the blade holder 6 in the direction of its upper end against a pinned there, further stop the blade holder. 6 As a result, when tightening the clamping screw 12, the blade 1 repeatedly assumes an exactly predeterminable, non-canting relationship with the blade holder 6. 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 PVC1 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, such as PVC 1 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

Patentansprüche claims
1. Vorrichtung zum Einschneiden einer Schwächungslinie in einer Folie umfassend eine Klinge (1) mit einer in Schnittrichtung zeigenden1. A device for cutting a line of weakness in a film comprising a blade (1) with a pointing in the cutting direction
Klingenspitze (2), die durch drei einander durchschneidende Keilflächen (3, 4, 5) begrenzt ist, einen Klingenhalter (6) und einen Kanal (7) zur Zuführung einer Flüssigkeit hinter der Klingenspitze (2) in die Schwächungslinie, dadurch gekennzeichnet, dass der Klingenhalter (6) die Klinge (1) an dem von der Schnittrichtung abgewandten Ende im Bereich der Klingenspitze (2) an zumindest einer Abstützstelle (8) abstützt, dass der Klingenhalter (6) von einem in der Abstützstelle (8) mündenden Kanal (7) für die Flüssigkeit durchdrungen ist und dass 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.Blade tip (2) delimited by three intersecting wedge surfaces (3, 4, 5), a blade holder (6) and a channel (7) for supplying a liquid behind the blade tip (2) to the weakening line, characterized 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 support point (8), that the blade holder (6) from a channel (8) in the support point (8). 7) for the liquid is penetrated and that the blade (1), starting from the mouth of the channel (7), is provided with an open groove (9) which ends in a downward direction and in the direction of the blade tip (2).
2. Vorrichtung nach 1 , dadurch gekennzeichnet, dass die Nut (9) unmittelbar hinter der Klingenspitze (2) endet.2. Device according to 1, characterized in that the groove (9) ends immediately behind the blade tip (2).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Nut (9) ein dreieckig in rückwärtiger Richtung und nach hinten und unten geöffnetes Profil hat.3. Apparatus according to claim 1 or 2, characterized in that the groove (9) has a triangular in the rearward direction and rearwardly and downwardly opened profile.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Nut (9) hinter der Klingenspitze (2) oberflächenbündig ausläuft.4. Device according to one of claims 1 to 3, characterized in that the groove (9) behind the blade tip (2) terminates flush with the surface.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Klinge (1) aus Hartmetall besteht. 5. Device according to one of claims 1 to 4, characterized in that the blade (1) consists of hard metal.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Klingenhalter (6) aus Schnellschnittstahl besteht.6. Device according to one of claims 1 to 5, characterized in that the blade holder (6) consists of high-speed steel.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Klinge (1) in einer zumindest teilweise in Schnittrichtung offenen Nut des Werkzeughalters (6) aufgenommen und darin mittels einer Klemmschraube (12) festlegbar ist.7. Device according to one of claims 1 to 6, characterized in that the blade (1) received in an at least partially open in the cutting direction groove of the tool holder (6) and therein by means of a clamping screw (12) can be fixed.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Klinge (1) mit dem oberen Ende an einen Anschlag des Werkzeughalters (6) anlegbar ist und eine keil- oder kegelförmige Eintiefung (10) zur Klemmung aufweist, in die eine Klemmschraube (12) einfügbar ist, und dass eine gedachte Verlängerung der Mittelachse der Klemmschraube (12) die Eintiefung oberhalb ihrer tiefsten Stelle mittig durchschneidet um eine Anpressung der Klinge (1) an den Anschlag zu bewirken.8. Apparatus according to claim 7, characterized in that the blade (1) with the upper end to a stop of the tool holder (6) can be applied and a wedge-shaped or conical recess (10) for clamping, in which a clamping screw (12 ) is inserted, and that an imaginary extension of the central axis of the clamping screw (12) the recess cut centrally above its lowest point to effect a pressing of the blade (1) to the stop.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Werkzeughalter (6) einen Bestandteil eines9. Device according to one of claims 1 to 8, characterized in that the tool holder (6) forms part of a
Schnellwechselwerkzeugs bildet. Quick change tool forms.
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 true EP1960165A2 (en) 2008-08-27
EP1960165B1 EP1960165B1 (en) 2010-05-19

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EP06805763A Not-in-force EP1960165B1 (en) 2005-10-21 2006-09-19 Device for cutting a break line into a film

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

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* 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
EP3463770B1 (en) * 2016-05-31 2021-04-14 Faurecia (China) Holding Co., Ltd. A cold knife system and a method for forming a cold knife weakening line
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

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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 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

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Title
See references of WO2007045317A3 *

Also Published As

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DE502006006998D1 (en) 2010-07-01
ITMI20061773A1 (en) 2007-04-22
WO2007045317A3 (en) 2008-09-18
DE102005050940B3 (en) 2006-12-14
ATE468210T1 (en) 2010-06-15
EP1960165B1 (en) 2010-05-19
WO2007045317A2 (en) 2007-04-26

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