EP0158648A1 - Procede et outil pour percer des trous - Google Patents

Procede et outil pour percer des trous

Info

Publication number
EP0158648A1
EP0158648A1 EP19840903440 EP84903440A EP0158648A1 EP 0158648 A1 EP0158648 A1 EP 0158648A1 EP 19840903440 EP19840903440 EP 19840903440 EP 84903440 A EP84903440 A EP 84903440A EP 0158648 A1 EP0158648 A1 EP 0158648A1
Authority
EP
European Patent Office
Prior art keywords
tool
cutting
punching
tools
pressing
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.)
Withdrawn
Application number
EP19840903440
Other languages
German (de)
English (en)
Inventor
Niels Erik Borgquist
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.)
Teknologisk Institut
Original Assignee
Teknologisk Institut
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 Teknologisk Institut filed Critical Teknologisk Institut
Publication of EP0158648A1 publication Critical patent/EP0158648A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B5/00—Clicking, perforating, or cutting leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type

Definitions

  • the invention relates to a method for punching holes in non-metallic sheet-like materials and a punching tool for performing the method.
  • a punch- ing tool with an annular cutting edge the size and shape of which correspond to the outer shape and the shape of the hole, respectively, of the end product is generally used.
  • This cutting tool is either manual ⁇ ly or mechanically pressed through the material from one side and towards an underlying backstop, a socal- led punching plate.
  • the tool After the punching the tool is withdrawn leaving a hole the cut object being wedged in the cutting edge from where it may be subsequently pressed out.
  • This known method does not give the object and the hole, respectively, a cutting surface which is at right angles to the surface because the cutting edge must have a certain bevelling or free edge to avoid being jammed in the material.
  • the bevelling side faces are particularly inconvenient for thick materials and a subsequent trimming is often required for obtaining a straight side face which is substantially at right angles to the surface.
  • the cutting tool must have the smallest possible wall thickness which will reduce the tool's strength and so its life at the same time while the requirements to the nature of the punching plate are increased.
  • the cut objects and holes, respectively, will moreover be uniform on both sides just as the cut side edges will be substantially at right angles to the surface so that the trimming process can be completely avoid ⁇ ed. Advantages in relation to time consumption and work are therefore obtained. This method will leave almost no burr and if any it will be situated in the middle of the object and so rarely cause any incon ⁇ venience.
  • the pressed out object can be subsequently removed since the object will be left hanging in the non-cut ring in the middle of the material so that the object or objects can be removed from the material at a later time.
  • preparations for the pressing out eg. a number of holes at a later date according to requirements just as it will be possible to adapt objects/holes by a suitable punching pattern.
  • Fig. 1 shows the cutting tool pressed into the material
  • Fig. 2 shows the tool with the pressing-out means in its forward position.
  • the drawing shows an example of the method according to the invention where the punching tool is mounted in two holders 18 and 19 which may be secured to a not shown bracket.
  • the holders may be manually operated.
  • these two holders there are mounted two sets of cutting tools comprising the cutting edges 10, 13 proper.
  • there are two circular cutting edges which can therefore punch a circular hole and an object having the shape of a circular disc 12 in a piece of material 1 being eg. skin or leather.
  • the cutting tools are each secured to a support con ⁇ nected to a piston 4, 14 in a working cylinder 2, 15.
  • a suitable admission of pressure medium such as air or liquid through pipes 8, 17, the cutting tools may be pressed into the leather 1 to a point, see Fig. 1, where the cutting edges almost meet by the centre in ⁇ side the leather.
  • the cylinders 4, 14 will impinge on the cylinder bottom and prevent fur ⁇ ther progression.
  • the piston By means of a pressing out piston 11 being rigidly connected to a further piston 3 in an overlying cyl ⁇ inder, the piston may be carried towards to disc 12, as shown in Fig. 2, by admission of the pressure medium to the cylinder via a pipe 6. The pressure medium is then fed to the opposite sides of the pis ⁇ tons via other pipes 9, 16, and the pistons 4, l4 move backwards and so out ot the leather.
  • the disc 12 may be pressed out and removed from the leather and if desired be collected in a container or the like be means of net shown guide means.
  • the disc may be pressed out by means of compressed air and the shown pressing-out device may be left out. The whole method can be controlled fully automatically so that the punching is effected quickly and precisely.
  • any other known form of working motors may be used.
  • the returning of the cutting tools may take place by means of spring power from springs mounted between cylinder bottom and piston.
  • electromagnetic motors may be used for moving the cutting edges either in both directions or in one direction and as mentioned above returning by means of springs.
  • movements may be performed by an electric motor moving the tools in a similar manner by means of suitable cam discs via arms.
  • a corresponding number of tools may be secured in a common holder with the possibility of a selective actuation of the tool or tools forming the prefixed hole pattern.
  • the present specification merely mentions skins and leather but the method may advantageously be used for making objects and/or holes in veneer, plastic, cork, packing material, paper, cardboard, textiles, rubber.
  • the method is particularly suitable for long-fibre materials which have hitherto caused problems by pre ⁇ viously known punching tools.
  • the method and the tool are suitable for work ⁇ ing materials which have been moistened by chemical liquids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

Lorsque l'on perce respectivement des trous et des objets (12) dans un matériau en feuille non métallique on peut obtenir une qualité et une vitesse de travail jusqu'ici inconnues en laissant un outil de coupe (10, 13) pénétrer, à partir du côté supérieur et/ou du côté inférieur du matériau (1), jusqu'à un point laissant un anneau non coupé dont l'épaisseur est de l'ordre de 0,01 mm. Le matériau (12) peut ensuite être retiré du matériau environnant (1), soit par un outil de retrait connu, soit par exemple par l'entrée d'air comprimé, pendant que l'outil de coupe (10, 13) se trouve dans la peau (1) ou après son retrait. Pour permettre leur fonctionnement, les bords de coupe (10, 13) peuvent être montés sur un moteur linéaire supérieur et un moteur linéaire inférieur (4, 2 et 14, 15), pouvant en outre commander le dispositif de retrait (11). Cela permet une commande entièrement automatique des outils.
EP19840903440 1983-09-16 1984-09-14 Procede et outil pour percer des trous Withdrawn EP0158648A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK4235/83 1983-09-16
DK423583A DK423583A (da) 1983-09-16 1983-09-16 Fremgangsmaade og vaerktoej til udhugning af huller

Publications (1)

Publication Number Publication Date
EP0158648A1 true EP0158648A1 (fr) 1985-10-23

Family

ID=8131600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840903440 Withdrawn EP0158648A1 (fr) 1983-09-16 1984-09-14 Procede et outil pour percer des trous

Country Status (3)

Country Link
EP (1) EP0158648A1 (fr)
DK (1) DK423583A (fr)
WO (1) WO1985001241A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513282B4 (de) * 1995-04-07 2006-09-14 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zum Schneiden von Kuststoffen sowie nach dem Verfahren hergestellter Datenträger
GB2345017B (en) * 1998-12-22 2003-02-12 Kcm Partnership The A method of forming packaging board
DE10023801C2 (de) * 2000-05-15 2002-05-23 Giesecke & Devrient Gmbh Vorrichtung zum Stanzen von Kunststoffen
DE10230365B8 (de) * 2002-07-05 2008-09-25 Mühlbauer Ag Vorrichtung und Verfahren zum Heraustrennen von Kunststoffkarten
EP1764194B1 (fr) * 2005-09-19 2009-07-29 Blumer Maschinenbau Ag Poinçon et utilisation d'un tel poinçon
SE537057C2 (sv) * 2012-03-13 2014-12-23 Förfarande och anordningar för att skära kompositmaterial, och tätningsanordningar tillverkade av kompositmaterial

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8501241A1 *

Also Published As

Publication number Publication date
DK423583A (da) 1985-03-17
WO1985001241A1 (fr) 1985-03-28
DK423583D0 (da) 1983-09-16

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19850528

AK Designated contracting states

Designated state(s): CH DE GB LI SE

17Q First examination report despatched

Effective date: 19860930

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BORGQUIST, NIELS, ERIK