EP0907471A1 - Dispositif servant a enlever par decoupage des parties d'une feuille lors de la production de pieces decoupees a partir d'une feuille - Google Patents

Dispositif servant a enlever par decoupage des parties d'une feuille lors de la production de pieces decoupees a partir d'une feuille

Info

Publication number
EP0907471A1
EP0907471A1 EP97921842A EP97921842A EP0907471A1 EP 0907471 A1 EP0907471 A1 EP 0907471A1 EP 97921842 A EP97921842 A EP 97921842A EP 97921842 A EP97921842 A EP 97921842A EP 0907471 A1 EP0907471 A1 EP 0907471A1
Authority
EP
European Patent Office
Prior art keywords
stripping
holes
pins
perforated plate
parts
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.)
Ceased
Application number
EP97921842A
Other languages
German (de)
English (en)
Inventor
Jürgen KARA
Friedrich Schramm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0907471A1 publication Critical patent/EP0907471A1/fr
Ceased legal-status Critical Current

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
    • B26D7/18—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
    • 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
    • B26D2007/1872—Means for removing cut-out material or waste using breakaway pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/20—Cutting sheets or blanks

Definitions

  • the invention relates to a device for breaking out parts in the production of blanks with certain edge profiles from a sheet of cardboard, paper, plastic or a composite material with the features specified in the preamble of claim 1 and a method for setting breakout pins.
  • Devices of the generic type are used in particular for the production of folding boxes. However, such devices can also be used for the production of so-called flip-top blanks.
  • the blanks of the individual packagings are printed on a sheet in multiple use and in one
  • the individual blanks are connected to one another and to the parts which are to be punched out and which can be both waste parts and useful parts, via breakpoints which are retained even after the individual blanks have been punched out and thus hold the sheet together for the further stripping process .
  • the breakpoints are set depending on the material and the machine, in particular taking into account the specific weight or the specific sheet weight (gr / m ⁇ ) of the material.
  • the processing of paper is from approx. 80 gr / m ⁇ possible, as well as solid cardboard for folding boxes of all weight classes and corrugated cardboard with E and B corrugations.
  • a stripping pin protruding downward in the upper frame is arranged congruently with each lower, upward stripping pin, namely within the waste outline of the waste part to be stripped.
  • the base plate usually consists of a wooden plate in which the contours of the stripping part are cut.
  • U1 discloses a device for breaking out cutting waste when punching cardboard boxes in an automatic punching machine with a die plate, the openings of which are congruent with the waste parts to be broken out.
  • vertically movable stripping tools are provided, which interact with clamping tools, which can be moved vertically below the die plate, for gripping and separating the waste parts.
  • the stripping tools preferably have stripping pins which act on the waste part in bores in a receiving plate or on a frame.
  • the clamping tools are designed as a flat, one-part or multi-part surface element which can be pressed into the die plate from below and which is in a particularly elastic operative connection with the stripping pins via the waste parts at the time of the stripping. This is necessary because the intended number of stripping pins can only be used in small numbers based on the area of the part.
  • a stripping machine for stripping undesired waste materials from blanks made of cardboard or the like which has a pair of interacting rollers.
  • a device with a hole pattern is attached to one of the rollers. Pins which penetrate the undesired material can be inserted into the individual holes, the surface of the other roller being sufficiently rigid. Det is to ensure that the blanks between the rollers are gripped and pulled through them, but on the other hand is such that the pins penetrate at least a part of the surface at any point.
  • the stripping pin and counterpressure interact to break out a strip of material. Surface processing is not possible, nor is punching waste broken out in the surface.
  • the break-out pins protrude only slightly from the roller surface. The punctiform line arrangement of the pins and their corresponding effect when they meet the upper counter-pressure roller and the cardboard sheet interposed between them do not guarantee that the parts will break out safely.
  • a stripping system for punching presses with a material plate is also known, in which holes are drilled, into which pins of different shapes and dimensions are inserted, clamped or screwed.
  • the assembled material plate is placed in a tool frame. Supports are arranged transversely across an attached pressure plate. The interaction with a base plate or die plate is not specified. Furthermore, the holes are indicated at large intervals according to the placement of the required pins.
  • the known stripping systems have the disadvantage, in particular in the case of fast-working automatic punching presses, that they do not lie quietly due to air vortices on the edges of large-area cut-outs or due to large closed areas of the lowering material plate and can have faults, so that often a clean flare-out Chen the parts is not possible.
  • the sheet is also subjected to a suction effect when moving back, in particular of large material plates, before it is pulled out of the stripping system of the automatic punching machine by the transport means.
  • the size of the sheet formats there are special requirements for the design of the frames and / or the material or holding plates of the stripping systems, which make the stripping tools relatively difficult, so that high acceleration forces have to be applied during the punching process. in order on the one hand to accomplish the punching process and on the other hand to return the stripping tool to the raised position.
  • the invention has for its object to provide a device that allows a clean stripping without using a lower arrangement of stripping pins, a quick and accurate arrangement of stripping pins m the stripping tool should be made possible.
  • the device should be easy to assemble and universally applicable and should influence the air layer above the sheet so that it does not warp during the punching process or when the stripping tool is raised.
  • the stripping tool should be of a light design in order to enable a simple construction in order to be able to design the drives for applying the acceleration forces with less power.
  • the invention provides that a perforated plate is used and that this perforated plate is individually fitted with stripping pins. If this perforated plate z. B. has a hole pattern of approx. 3 mm and each of the through holes has a diameter of approx. 2 mm, this means that approximately 140,000 holes are provided with a format of approx. 70 x approx. 100 cm. With a format of approx. 140 x approx. 100 cm, approx. 280,000 perforators are already planned, of which only a small number of perforators are used to break out the parts from the sheet.
  • the punching tool moves down between the sheet and the perforated plate, which are at a distance of about 1 cm to about 1.5 cm above the sheet during the punching process ends, i.e. a total of only a movement stroke of approx. 2 cm to approx. 5.5 cm, a uniform air build-up occurs because the air can escape through the free through holes. If, on the other hand, the perforated plate is moved upwards, then no punctiform negative pressure is generated, since air flows downward through the open holes when starting up, and an air pressure compensation is thus provided. The result of this is that the sheet that is drawn in cannot flutter due to air vortices or vacuum.
  • the sheet lies flat and can also be removed after the punching without a long time in between.
  • the punching speed can be increased significantly with the same punching quality.
  • the punching machine can even operate at a punching speed of approx. 9,000 to approx. 10,000 strokes / hour. work without the punching quality being impaired, for example by side attachments on the contour edge of a stripping pin.
  • the overall perforated plate size corresponds approximately to the sheet size, the receiving edges also having to be taken into account in order to insert the perforated plate into a receiving frame, a machine to be able to insert a frame or an interchangeable frame as specified in the prior art.
  • the perforated plate is also significantly reduced in weight.
  • a reduction in weight of more than 60% can be achieved at particularly close distances, so that only smaller acceleration forces have to be applied for the movement in order to be able to carry out the punching process.
  • the lower weight also facilitates handling when inserting into the machine frame or when loading outside the machine, for which purpose the perforated plate can also be used in an interchangeable frame.
  • the placement can also be automated, for example, if the use of a sheet is created by a CAD system, the part outline data can be can also be indirectly transferred to a CNC-controlled automatic placement machine, which places the break-out pins in a perforated plate in the specified grid at the specified points.
  • Base plate falls through. It has proven to be particularly advantageous to choose the outline of the opening in the base plate to be somewhat smaller than that of the part to be broken out, e.g. B. to lay 2/10 to 3/10 mm inwards. This leads to the fact that the stripping part is pressed into the opening under its own spring tension and cannot move upwards when the stripping pins are retracted quickly due to the spring clamping effect in connection with the side walls of the opening and with a slightly conical shape
  • the invention further provides that the frame which receives the perforated plates is divided into segment-shaped fields, which are fixed or changeable, into the individual ones required for the breakout Perforated plates can be used as single plates. This can reduce the weight of the entire plate.
  • break-out pins are only placed in the left and right edge areas in order to be able to break out the waste areas lying underneath from the sheets.
  • a pressure plate is only required if the stripping pins with their holding sections in the perforated plate are not inserted from the underside and are supported with an annular flange on the underside and z. B. are fixed by a releasable locking connection or are screwed into this, for which purpose the through hole must have a thread.
  • the stripping pins can be inserted into the top Through holes are used, a head formation being provided in order to prevent the stripping pins from falling through.
  • a pressure plate is necessary from above, which is placed on the head surfaces of the stripping pins and transfers the necessary punching force to the individual stripping pins from the frame.
  • the pressure plate can correspond to the maximum frame size, but it can also be adapted to the frame size actually set and thus to the perforated plate size used. According to the teaching of the invention, when using a perforated plate, care must be taken to ensure that the through holes which are not occupied by break-out pins remain free. Therefore, the pressure plate also has through holes, which, however, have to be smaller than the head of the respective stripping pin. When the frame is guided laterally in the stripping machine, the designer is given various construction options.
  • the perforated plate can also consist, for example, of aluminum, which, due to its material properties, ensures longer use with changing stripping pin inserts.
  • the pin head shapes can be flat heads or cylinder heads. The heads can be countersunk in the corresponding holes in the perforated plate or rest on the surface with an annular flange. Movement in the longitudinal direction of the stripping pins is avoided by the pressure plate.
  • the stripping pins can be made of metal or plastic.
  • the holes to be made can be made in a uniform or offset hole pattern. If the perforated grid is set and round holes are used, the entire perforated grid acts like a diagonal offset grid, so that even smaller bar-shaped parts can be punched out.
  • the narrow surfaces can, however, lead to the tolerance problems indicated above, which can be compensated for in a simple manner by dividing the perforated plate can by slightly shifting the set rows of holes in order to be able to compensate the tolerance range for the waste surface within a hole grid.
  • the stripping tool according to the invention is shown disassembled in a perspective view.
  • This consists essentially of a base plate 12, the m known manner z. B. is a plywood sheet, a metal or plastic sheet and are arranged in the openings 13 and 15 corresponding to the waste parts of a sheet. Protruding frame parts 16 or other guides on the plate 12 can be provided for lateral guidance limitation.
  • the sheet 8 is positioned on the base plate 12, e.g. B. by side and forehead markers, placed such that the parts 10, 14 to be broken out are congruent over the openings 13 and 15.
  • the sheet is held in the composite after the contour cut provided by the breakpoints 11.
  • the gripper edge 5 serves to grasp the sheet by means of a gripper and puller, while the lateral edges 6 hold the sheet together in the longitudinal direction.
  • the holes 2 are z. B. arranged in grid 3 in offset from row to row, so that the visible diagonal grid results.
  • the through holes 2 consist of a lower part 19, the diameter of which corresponds to the diameter of the stripping pin 4.
  • the upper section 18 has a larger diameter than the lower section and is so adapted to the diameter and shape of the head 17 at the upper end of the stripping pin 4 that it can be inserted with the head 17 in such a hole, as is shown in the right hole is shown.
  • This has the advantage that the z. B. steel stripping pins can not fall through.
  • other storage options e.g. B. conical designs of the holes and pin ends possible. It should only be taken into account that the break-out pins 4 will not fall down.
  • the head 17 can also be designed as a flat head, like a nail. As well the guide openings 2 or the bores need not have a depression or a depression section; the heads can protrude upwards.
  • the invention conveys to the person skilled in the art a number of solution approaches which are neither specified in the example nor in the subclaims.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

L'invention concerne un dispositif permettant d'enlever par découpage des parties lors de la production de pièces découpées, présentant des tracés d'arêtes définis, à partir d'une feuille de carton, de papier, matière plastique ou d'une matière composite, au moyen d'un outil de découpage qui présente une plaque de support, sur laquelle la feuille pourvue des parties à découper est placée, et qui présente des ouvertures correspondant aux surfaces des parties à découper, une plaque perforée étant disposée sur ladite plaque de support et présentant des trous de passage disposés selon un quadrillage, dans lesquels sont fixés des tiges de découpage dirigées vers le bas, qui lors du déplacement relatif des différents plans viennent en contact avec les parties de la feuille à enlever et les enfonce dans lesdites ouvertures.
EP97921842A 1996-05-03 1997-05-01 Dispositif servant a enlever par decoupage des parties d'une feuille lors de la production de pieces decoupees a partir d'une feuille Ceased EP0907471A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19617688 1996-05-03
DE19617688A DE19617688A1 (de) 1996-05-03 1996-05-03 Verfahren und Ausbrechwerkzeug zum Ausbrechen von Stanzabfällen bei der Herstellung von Zuschnitten aus einem Bogen
PCT/EP1997/002232 WO1997042010A1 (fr) 1996-05-03 1997-05-01 Dispositif servant a enlever par decoupage des parties d'une feuille lors de la production de pieces decoupees a partir d'une feuille

Publications (1)

Publication Number Publication Date
EP0907471A1 true EP0907471A1 (fr) 1999-04-14

Family

ID=7793168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97921842A Ceased EP0907471A1 (fr) 1996-05-03 1997-05-01 Dispositif servant a enlever par decoupage des parties d'une feuille lors de la production de pieces decoupees a partir d'une feuille

Country Status (3)

Country Link
EP (1) EP0907471A1 (fr)
DE (2) DE19617688A1 (fr)
WO (1) WO1997042010A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6052909A (en) 1998-08-26 2000-04-25 Gardner; Mark T. Hand-held oval cutting device
US6158133A (en) * 1998-12-23 2000-12-12 Fiskars Inc. Oval cutter
DE102012103858B4 (de) 2011-12-05 2024-01-25 Boxplan Gmbh Vorrichtung und Verfahren zum Herstellen eines Ausbrechwerkzeuges
CN103192423A (zh) * 2013-04-12 2013-07-10 昆山市飞荣达电子材料有限公司 手工压料头治具
DE202016102593U1 (de) 2016-05-13 2016-06-10 Bobst Mex Sa Vorrichtung zum Bearbeiten von Werkstückbögen
DE102017100957A1 (de) 2017-01-18 2018-07-19 Boxplan Gmbh & Co. Kg Vorrichtung zum wechselnden Einschub eines ersten Stössels oder eines zweiten Stössels
CN113715112A (zh) * 2021-06-24 2021-11-30 格力电器（武汉）有限公司 板材掰边装置以及板材边料回收系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1981974A (en) * 1931-07-20 1934-11-27 Vernimb August Automatic stripping machine for folding box work
ATE99225T1 (de) * 1987-10-13 1994-01-15 Meurer Nonfood Product Gmbh Vorrichtung und verfahren zum herstellen einer einrichtung fuer die bearbeitung von plattenfoermigen werkstuecken od.dgl.
CH684187A5 (fr) * 1990-04-26 1994-07-29 Bobst Sa Outil supérieur mobile pour une station d'éjection des déchets dans une machine de découpage de feuilles en vue de la production d'emballages.
US5136907A (en) * 1991-05-22 1992-08-11 Amp Incorporated Prevention of slug pulling in stamping presses
DE9307397U1 (de) * 1993-05-15 1994-09-22 Emrich, Dirk, 51709 Marienheide Vorrichtung zum Ausbrechen von Zuschnittabfällen beim Stanzen von Karton
DE9314706U1 (de) * 1993-09-29 1994-02-10 Gerent, Withold, 33818 Leopoldshöhe Ausbrechsystem für Stanzautomaten
CH690027A5 (fr) * 1994-07-14 2000-03-31 Bobst Sa Outil supérieur mobile pour la séparation des poses d'une feuille travaillée par une presse de fabrication d'emballages.
DE29608009U1 (de) * 1996-05-03 1996-07-25 Kara, Jürgen, 96279 Weidhausen Ausbrechwerkzeug zum Ausbrechen von Stanzabfällen bei der Herstellung von Zuschnitten aus einem Bogen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9742010A1 *

Also Published As

Publication number Publication date
WO1997042010A1 (fr) 1997-11-13
DE19617688A1 (de) 1997-11-13
DE29707792U1 (de) 1997-07-10

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