EP2347870B1 - Methode de fabrication d'une ligne de déchirement - Google Patents

Methode de fabrication d'une ligne de déchirement Download PDF

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Publication number
EP2347870B1
EP2347870B1 EP10000697.2A EP10000697A EP2347870B1 EP 2347870 B1 EP2347870 B1 EP 2347870B1 EP 10000697 A EP10000697 A EP 10000697A EP 2347870 B1 EP2347870 B1 EP 2347870B1
Authority
EP
European Patent Office
Prior art keywords
tear line
drill bit
path
course
tool
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.)
Active
Application number
EP10000697.2A
Other languages
German (de)
English (en)
Other versions
EP2347870A1 (fr
Inventor
Holger Dietz
Krzystof 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42240778&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2347870(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to HUE10000697A priority Critical patent/HUE030816T2/en
Priority to PT100006972T priority patent/PT2347870T/pt
Priority to SI201031283A priority patent/SI2347870T1/sl
Priority to PL10000697T priority patent/PL2347870T3/pl
Priority to ES10000697.2T priority patent/ES2603221T3/es
Application filed by Frimo Group GmbH filed Critical Frimo Group GmbH
Priority to EP10000697.2A priority patent/EP2347870B1/fr
Publication of EP2347870A1 publication Critical patent/EP2347870A1/fr
Publication of EP2347870B1 publication Critical patent/EP2347870B1/fr
Application granted granted 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
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • 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
    • 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
    • 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
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations

Definitions

  • the invention relates to the use of a device for producing a tear line in the back of a cover material, which is preferably at least partially made of plastic, in particular an interior trim material for vehicles.
  • Devices are used, for example, in the manufacture of instrument panels, steering wheel caps, or other interior trim materials to create a line of weakness in the cover materials for a rear airbag.
  • a device is for example from the DE 202 15 642 known.
  • the tool is thereby formed by a knife edge, which does not take any material from the section produced in the back of a thermoplastic cover sheet, while it is moved forward and forth vertically following the desired course of the tear line.
  • a release agent which wets the flank surfaces is applied to the freshly produced cut.
  • the correct supply and dosage of the release agent are problematic because too small an amount causes the flank surfaces stick together and hinder the desired in the case of a car accident, controlled tearing of the cover in the course of the tear and because too large an amount leads to Release agent in the vicinity of the tear line on the back of the cover sheet passes and prevents the back in this area in a desirable manner glued to the foam backing and at least bubbles.
  • WO 2004/026629 discloses a chisel having a profile of the angle of the tip, which has two steps and rises.
  • DE 3529686 discloses an apparatus for mobile use with an ultrasonic chisel having in its front portion an increasing angle towards the cutting edge.
  • US 2002/130497 A1 a method according to the preamble of claim 1.
  • the bit has a pointed angle.
  • the invention has for its object to provide a device which simplifies the production of the tear line, ensures a safe function in the deployment of an airbag and makes it unnecessary to use a release agent.
  • the invention is based on the idea to prevent sticking of the covering material in the region of the tear line without expensive additives.
  • the result is a heating of the material of the covering material in the region of the tear line to be formed that the material is displaced from the area of the tear line. Not only can bonding be prevented, but there is also an improved cut quality.
  • the bit according to the invention viewed parallel to the direction of the reciprocating motion, has a point angle increasing in the direction of the cutting edge.
  • the heat transfer is increased to the cover material at the bottom of the tear line generated by the chisel and favors a promotion of the material from the generated tear line and thus the groove formation.
  • the bit is at the tip, measured in the direction of the course of the tear, preferably limited by a convex edge. This results in a significantly increased durability of the cutting edge, and the bit can be advanced along the course of the tear line without being pulled out of the cover material. In addition, it can be avoided that arise at the bottom of the tear line notches that can affect the function.
  • the bit measured transversely to the course of the tear line, a point angle of 20 to 45 °.
  • the chisel may also be limited, at least in the region of the tear line to be generated, parallel to the direction of the course of the tear line, by convexly outwardly curved side walls. In this way, the bit can be pivoted about its axis to produce an annular closed tear line, which is at least in some areas of curved course.
  • the chisel has at the top, measured in the direction of the course of the tear, suitably a length of 0.2 to 3 mm.
  • a tear-off line of uniform profile can be produced which has a course guided around tight radii.
  • the forward movement of the bit in the course of the desired tear line at a speed of 5 to 50 mm / s is effected. Within this range, a particularly good contour sharpness of the generated tear line and a particularly economical operation are achieved.
  • the chisel is expedient programmatically following the course of the desired tear line forward movable. This allows a particularly rapid change with respect to the production of differently shaped tear lines.
  • the inventive method for producing a tear line is the subject of claim 1.
  • the tear line is provided in the course of interruptions in which the bit is moved forward without touching the covering material.
  • the intermediate zones between the individual sections of the tear line can then form hinges which hold the region enclosed by the tear line in the event of an airbag deployment and prevent injuries.
  • FIG. 1 An embodiment of the device according to the invention is in Fig. 1 shown schematically in cross-sectional view.
  • the device is used to produce a tear line 1 in the back of a cover material 2, which can be used for example as an instrument panel, steering wheel cover or other interior trim part for (power) vehicles.
  • the cover material 2 is made of polypropylene in a conventional blend with EPDM and may, for example, have a total thickness D of 2.2 mm (or in the range of 1 to 3 mm). It should be noted, however, that within the scope of the invention, a wide variety of covering materials, including films, composite materials or rigid materials may be used.
  • the device according to the invention comprises an unyielding support 3, by means of which the covering material 1 can be supported, and a tool which can be moved back and forth at a distance above it, which can be moved back and forth in the direction of the support 3, which can be dipped into the rear side of the covering material 2 and the course 5 of FIG desired tear line 1 following is moved forward.
  • a drive for the tool for example, a sonotrode or other suitable ultrasonic device can be used.
  • the tool is formed by a chisel 4, which, measured transversely to the course 5 of the tear line 1, for example, has a point angle of 20 to 45 °, and its reciprocating motion parallel to the longitudinal direction of the chisel 4, is effected at a frequency of 18 to 40 kHz.
  • the associated amplitude of the reciprocation is based on the respective cover material and in the present embodiment is 25 microns.
  • the bit 4 is advanced at a rate of 10 mm / second following the course 5 of the desired tear line 4.
  • the tear line 1 is introduced so that an intact residual thickness d of the covering material 2 of 0.5 mm is maintained.
  • the chisel 4 is at the top, measured in the direction of the course 5 of the tear line 1, bounded by a convexly extending cutting edge 6.
  • the chisel 4 has, viewed in parallel with the direction of its reciprocating motion, an angle angle increasing in the direction of the cutting edge 6. It is in the region of the tear line 1 to be generated, viewed parallel to the direction of the course 5 of the tear line 1, limited by convexly curved outward side walls.
  • Fig. 2 shows a provided with a broken tear line cover material in a view from behind.
  • various tear lines 1 have a distance A from one another, which serves to hold the cutout enclosed by the annular tear lines as if by a hinge when an airbag is deployed.
  • the tear line 1 is programmatically interruptible and the chisel 4 following the desired tear line 1 in the area in question on the back 6 of the cover 2 forward without touching them and without creating a tear line there.
  • Fig. 3 shows a chisel 4 in a view from the side.
  • the chisel 4 has at the top, measured in the direction of the course 5 of the tear line 1, a length L of 0.2 to 3 mm.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Earth Drilling (AREA)

Claims (9)

  1. Procédé servant à fabriquer une ligne de déchirement (1) dans la face arrière d'un matériau d'habillage intérieur pour véhicules (2), lequel matériau est constitué de manière préférée au moins par endroits de plastique, en utilisant un dispositif, qui comprend :
    un support (3), lequel permet de soutenir le matériau de recouvrement (1), et
    un outil pouvant effectuer des mouvements de va-et-vient de manière motorisée en direction du support (3), installé au-dessus de ce dernier à une certaine distance , lequel outil peut être déplacé en avant de manière à s'enfoncer dans la face arrière du matériau de recouvrement (2) et à suivre le tracé (5) de la ligne de déchirement (1) souhaitée,
    le mouvement de va-et-vient de l'outil (4) étant effectué à une fréquence de 16 à 70 kHz, de manière préférée de 18 à 40 kHz,
    caractérisé en ce que l'outil est formé par un ciseau (4), lequel ciseau (4) observé parallèlement à la direction du mouvement de va-et-vient, présente un angle de pointe croissant en direction de la lame (6).
  2. Procédé selon la revendication 1, caractérisé en ce que le ciseau (4) est délimité au niveau de la pointe, mesuré en direction du tracé (5) de la ligne de déchirement (1), par une lame (6) s'étendant au moins par endroits de manière convexe.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le ciseau (4) présente un angle de pointe de 20 à 45°, mesuré par rapport au tracé (5) de la ligne de déchirement (1).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le ciseau (4) est délimité au moins dans la zone de la ligne de déchirement (1) à produire, observée parallèlement à la direction du tracé (5) de la ligne de déchirement (1), par des parois latérales bombées de manière convexe vers l'extérieur.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le ciseau (4) présente, au niveau de la pointe, mesuré en direction du tracé (5) de la ligne de déchirement (1), une longueur de 0,2 à 3 mm.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'amplitude du mouvement de va-et-vient du ciseau (4) est de 5 à 40 micromètres, de manière préférée de 20 à 30 micromètres.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le mouvement vers l'avant du ciseau peut être effectué le long du tracé (5) de la ligne de déchirement (1) souhaitée à une vitesse de 5 à 50 mm/s.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le ciseau (4) peut être déplacé vers l'avant par une commande programmée en suivant le tracé (5) de la ligne de déchirement (1) souhaitée.
  9. Procédé selon la revendication 1, caractérisé en ce que la ligne de déchirement (1) est pourvue, sur son tracé (5), d'interruptions (a), dans lesquelles le ciseau (4) est déplacé vers l'avant sans toucher le matériau de recouvrement (2).
EP10000697.2A 2010-01-25 2010-01-25 Methode de fabrication d'une ligne de déchirement Active EP2347870B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PT100006972T PT2347870T (pt) 2010-01-25 2010-01-25 Dispositivo para produzir uma linha de rompimento
SI201031283A SI2347870T1 (sl) 2010-01-25 2010-01-25 Postopek za izdelavo odtržne črte
PL10000697T PL2347870T3 (pl) 2010-01-25 2010-01-25 Sposób wytwarzania linii rozrywania
ES10000697.2T ES2603221T3 (es) 2010-01-25 2010-01-25 Dispositivo para producir una línea de rasgado
HUE10000697A HUE030816T2 (en) 2010-01-25 2010-01-25 Method for producing a breaker line
EP10000697.2A EP2347870B1 (fr) 2010-01-25 2010-01-25 Methode de fabrication d'une ligne de déchirement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10000697.2A EP2347870B1 (fr) 2010-01-25 2010-01-25 Methode de fabrication d'une ligne de déchirement

Publications (2)

Publication Number Publication Date
EP2347870A1 EP2347870A1 (fr) 2011-07-27
EP2347870B1 true EP2347870B1 (fr) 2016-06-29

Family

ID=42240778

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10000697.2A Active EP2347870B1 (fr) 2010-01-25 2010-01-25 Methode de fabrication d'une ligne de déchirement

Country Status (6)

Country Link
EP (1) EP2347870B1 (fr)
ES (1) ES2603221T3 (fr)
HU (1) HUE030816T2 (fr)
PL (1) PL2347870T3 (fr)
PT (1) PT2347870T (fr)
SI (1) SI2347870T1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020208558A1 (de) 2020-07-08 2022-01-13 Frimo Group Gmbh Schneidklingenmontagevorrichtung, Schneidvorrichtung sowie Magazin für eine Schneidklinge
DE102021201395A1 (de) 2021-02-15 2022-08-18 Frimo Group Gmbh Schneidvorrichtung sowie Verfahren

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529686A1 (de) * 1985-08-20 1987-02-26 Fein C & E Schneidvorrichtung zum schneiden von elastischen materialien
WO2004026629A2 (fr) * 2002-09-17 2004-04-01 Collins & Aikman Products Co. Lame a ultrasons pour eraflure d'une rainure a angle double et produits ainsi realises

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498514B1 (fr) * 1980-11-14 1986-12-26 Gerber Garment Technology Inc Appareil et procede utilisant des ultrasons pour decouper une matiere en feuille
US6692019B2 (en) * 2001-03-13 2004-02-17 Delphi Technologies, Inc. Method to create invisible air bag deployment panel
DE20215642U1 (de) 2002-01-25 2003-02-06 Heidel Gmbh & Co Kg Werkzeug U Schneidwerkzeug

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3529686A1 (de) * 1985-08-20 1987-02-26 Fein C & E Schneidvorrichtung zum schneiden von elastischen materialien
WO2004026629A2 (fr) * 2002-09-17 2004-04-01 Collins & Aikman Products Co. Lame a ultrasons pour eraflure d'une rainure a angle double et produits ainsi realises

Also Published As

Publication number Publication date
HUE030816T2 (en) 2017-06-28
ES2603221T3 (es) 2017-02-24
PL2347870T3 (pl) 2017-02-28
SI2347870T1 (sl) 2017-01-31
PT2347870T (pt) 2016-10-14
EP2347870A1 (fr) 2011-07-27

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