EP3437815A1 - Rotationsstanze zum ausstanzen eines materialstücks aus einem bedruckstoff - Google Patents

Rotationsstanze zum ausstanzen eines materialstücks aus einem bedruckstoff Download PDF

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Publication number
EP3437815A1
EP3437815A1 EP18181811.3A EP18181811A EP3437815A1 EP 3437815 A1 EP3437815 A1 EP 3437815A1 EP 18181811 A EP18181811 A EP 18181811A EP 3437815 A1 EP3437815 A1 EP 3437815A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
punching
guide element
rotary punch
punch according
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.)
Pending
Application number
EP18181811.3A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rolf Kündgen
Rolf Grittmann
Philipp Doley
Benjamin Kreth
Reinhold Hiller
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP3437815A1 publication Critical patent/EP3437815A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • B26F1/42—Cutting-out; Stamping-out using a press, e.g. of the ram type having a pressure roller
    • 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
    • B26F1/44—Cutters therefor; Dies 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
    • B26D7/01—Means for holding or positioning work
    • B26D7/018—Holding the work by suction
    • 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
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1854—Means for removing cut-out material or waste by non mechanical means by air under pressure
    • 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
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
    • 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
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • 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
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4445—Matrices, female dies, creasing tools
    • 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
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4472—Cutting edge section features
    • 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
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4481—Cutters therefor; Dies therefor having special lateral or edge outlines or special surface shapes, e.g. apertures

Definitions

  • the present invention relates to a rotary die cutter having the features of the preamble of claim 1.
  • the invention is in the technical field of the graphic arts industry and in particular in the field of stamping.
  • Punching in postpress is the sharing of materials, e.g. of substrates such as paper, cardboard, cardboard or plastic film, in a divergent from the line dividing line.
  • the material can be conveyed as a sheet or web.
  • the punching is preferably carried out in the knife-edge principle and often using punching blades with a closed mold, so for example. circular or polygonal shape.
  • a rotating punching cylinder and a counter-pressure cylinder assigned to it are used. Together they form a stamping plant.
  • the punching cylinder carries the punching die with the punching blades, which cooperate with the lateral surface or an elevator of the counter-pressure cylinder.
  • the punching waste also called “snippet” in this application
  • the benefits can be further transported and processed, e.g. broken out, separated, separated and filed.
  • the DE 10 2004 058 599 B4 discloses a device for refining arcuate substrates.
  • the device comprises two rotationally cooperating processing tools, in particular rollers, for punching the substrate.
  • At least one of the rollers has openings, which can be connected to a suction air source and / or Blas Kunststoffmaschine.
  • a suction hood can be provided.
  • DE 101 47 486 A1 discloses a punching device with magnetic cylinder, impression cylinder and suction.
  • the problem may occur that the (larger) snippets completely cover the (smaller) suction air opening of the machining tool.
  • the suction air then acts only on a small area of the Schnipsels act, whereby the holding force may be less than required for a secure hold. Snippets can not be safely transported and removed.
  • a rotary punch according to the invention for punching out a piece of material from a printing substrate comprises: a punching cylinder and an associated, the printing material leading impression cylinder, the punching cylinder is connected to a suction air source and preferably alternately with a Blas Kunststoffario; a punching die arranged on the punching cylinder and having at least one punching knife having a closed shape and a suction opening within the closed mold; on arranged on the impression cylinder cylinder lift; at least one raised or recessed first guide element for conducting suction air and preferably alternately blowing air, which is arranged within the closed mold and / or at least one recessed or raised second guide element for conducting air, preferably of suction air and preferably alternately of blowing air, which in Cylinder lift is arranged.
  • the invention makes it possible to punch rotationally without problems, i. Remove snippets problem-free both from the substrate to promote with the punching cylinder or its die as well as to remove from the die or their punching knife.
  • a first guide element is provided according to the invention within the closed mold and / or a second guide element in the cylinder lift.
  • both guide elements are provided.
  • both guide elements act together.
  • the first baffle may remove the suction air from the suction port to the piece of material or chips, i. lead to its surface facing the punching cylinder, in particular to the entire surface (of course, reduced by the proportion which is covered by the guide element or its support surface).
  • the suction force can be increased as a result, as well as the holding force.
  • the separation of the Schnipsels from the substrate, if instead of suction air alternately blowing air is applied, can be improved thereby.
  • the second guide element can lead air, already during the detachment of the punching knife from the impression cylinder or its surface, between the cylinder lift and the snippets.
  • the detachment of Schnipsels is improved by the cylinder lift, especially when the snippet adheres to the cylinder elevator.
  • a preferred embodiment of the invention may be distinguished by the fact that the first guide element to the outer surface of the punching die is raised or recessed and / or that the second guide element is recessed or raised to the outer surface of the cylinder elevator.
  • the punching die preferably has a thickness of 0.1 to 0.2 millimeters (measured without the height of the punching blades).
  • the preferred material is metal, for example steel.
  • the cylinder lift preferably has a thickness of 0.05 to 0.2 millimeters. As its material plastic is preferably selected.
  • the cylinder lift is preferably glued, in particular detachable.
  • a preferred embodiment of the invention may be characterized in that the raised first and / or second guide element is designed as a web.
  • the bridge can be straight or curved.
  • the web can run radially or parallel to the axis of the impression cylinder. It may be a single bridge or it can also be provided more webs. Several webs are preferably similar or identical.
  • the ridge height (measured relative to the outer surface of the die or the cylinder elevator) is preferably 0.05 to 0.2 millimeters.
  • a preferred embodiment of the invention may be distinguished by the fact that the web formed as the first guide element has a distance from the punching knife. The distance is preferably 0.2 to 1.0 millimeters.
  • a preferred embodiment of the invention may be characterized in that a support surface of the web formed as a first guide element is lower than the punching blade or its cutting edge.
  • the height difference is preferably 0.1 to 0.5 millimeters.
  • a preferred embodiment of the invention may be characterized in that the recessed first and / or second guide element is formed as a groove.
  • the groove can be straight or curved.
  • the groove may be radial or parallel to the axis of the impression cylinder. It may be a single groove or it may also be provided more grooves. Several grooves are preferably similar or identical.
  • the groove depth (measured relative to the outer surface of the die or the cylinder elevator) is preferably 0.01 to 0.2 millimeters.
  • a preferred embodiment of the invention may be characterized in that the second guide element formed as a groove is arranged in the circumferential direction of the impression cylinder.
  • a preferred embodiment of the invention may be characterized in that the second guide element designed as a groove is arranged transversely to the circumferential direction of the impression cylinder.
  • a preferred embodiment of the invention may be characterized in that the cylinder lift is formed as a film or a film strip and is glued to the surface of the impression cylinder.
  • a film strip is used.
  • the area of the film preferably corresponds to the area of the printing material, in particular if it is present as a sheet, or is larger than this area.
  • the foil strip is preferably arranged with its longitudinal direction parallel to the axis of the impression cylinder and its width in the transverse direction preferably corresponds at least to the extent of the punching knives and is e.g. 10 to 50 millimeters.
  • a preferred embodiment of the invention may be characterized in that the punching knife penetrates into the cylinder lift during punching, in particular penetrates the cylinder lift. As a result, the substrate material piece lies deeper in the punching knife or its closed shape and can be separated more easily from the printing substrate.
  • FIG. 1 shows a side view of a machine, in particular a printing press 1, and a rotary die 2 of such a machine.
  • the rotary die can also form a stamping of the machine.
  • the machine can be, for example, a Speedmaster 52 from Heidelberger Druckmaschinen AG.
  • the rotary die comprises a punching cylinder 3 and a punching cylinder associated with it, i. cooperating with him impression cylinder 4.
  • the impression cylinder is used to transport a substrate 5, in particular a sheet of paper, cardboard, cardboard or foil (plastic or metal / metallized).
  • the rotary die is provided for punching out a piece of material (or a so-called Schnipsels) 6 from the substrate or designed for this purpose.
  • the punching cylinder 3 is connected to a suction air source 7 and to a blast air source 8.
  • the suction air provided thereby serves to suck in the piece of material 6 during the punching operation (at a first angular position) and the supplied blast air serves to remove the piece of material / snippet after the punching operation (at a second angular position).
  • a punching mold 3 is received, for example, held magnetically.
  • the stamping die has at least one punching knife 10, preferably a plurality of punching knives.
  • the punching knife has a closed mold 11 or a so-called ring shape.
  • the ring shape may e.g. be formed as a circle, oval, square or rectangle. Other, arbitrarily shaped, closed forms or rings are possible.
  • the die 9 has at least one suction opening 12, e.g. a central and / or circular suction opening.
  • the suction opening 12 communicates with the suction air source 7 in connection, for example via a radial and / or axial bore of the punching cylinder 3 and a rotary feedthrough of the punching cylinder.
  • the suction opening is small, preferably less than 50% or less than 25% or less than 10%, compared to the area bounded by the closed shape (knife contour).
  • the cylinder lift is preferably designed as a foil or a preferably narrow foil strip (parallel to the axial direction of the impression cylinder 4).
  • the cylinder lift is preferably glued to the surface of the impression cylinder.
  • the punching knife 10 or its cutting edge 10a penetrates into the printing material and penetrates it.
  • the punching knife or its cutting edge also penetrates into the cylinder lift 13 and also penetrates this, so that the cutting edge touches the surface 4a of the impression cylinder 4. Since the cylinder elevator 13 is adhered to the surface of the impression cylinder, the lying within the closed mold 11 piece of the cylinder elevator can not be removed by the suction air from the impression cylinder. In addition, the piece of material 6 is above it.
  • the detachment of the material piece 6 is improved by at least one second guide element 15, in particular a groove, in the cylinder 13. Due to the rotational movements of the two cylinders 3 and 4, the punching knife 10 or its cutting edge 10a again moves away from the surface 4a of the counter-pressure cylinder 4 and air can pass through the second guide element into the intermediate space between the cylinder winding 13 and the piece of material 6.
  • the piece of material 6 comes on at least a first guide element 14, preferably a web, the die 9 to lie.
  • the suction port 12 completely closes and thereby decreases the suction force and holding force.
  • the first guide element or the web preferably has at least one support surface 16.
  • the effective diameter of the suction opening is increased by the first guide element in an advantageous manner.
  • the first guide element can reduce the amount of sucked erroneous air in an advantageous manner.
  • the material piece 6 is moved out of the gap between the two cylinders 3 and 4 by the rotational movement of the punching cylinder 3 and moved into the effective range of a suction hood 17.
  • the suction port 12 is separated from the Saugluftario 7 and connected to a Blas mobilis provoked suction opening and the piece of material 6 is blown out of the closed mold and removed by the suction hood 17.
  • FIG. 2 shows in detail a plan view of the impression cylinder 4 with the arranged on its surface 4a cylinder winding 13.
  • the cylinder lift has at least a second guide element 15, which is formed in the example shown as a groove.
  • the groove or the majority of the grooves can be aligned substantially parallel to a circumferential direction 19 of the impression cylinder 4.
  • a comparison of FIGS. 1 and 2 shows that in FIG. 1 the orientation of the second guide element is not selected parallel to the circumferential direction 19, but substantially transversely to the circumferential direction 19. Both are therefore possible.
  • FIG. 2 In addition, the punching knife 10 or its closed mold 11 is shown schematically. It can be seen that the space bounded by the closed mold is connected to the outside space by means of at least one second guide element 15 so that air can penetrate into the interior of the closed mold 11 during the lifting of the punching knife from the impression cylinder 4.
  • FIG. 3 is shown as a detail the penetration of air schematically.
  • On the impression cylinder 4 and the surface 4a of the cylinder lift 13 is received with its outer surface 13a.
  • a groove 15 is formed in the cylinder lift 13.
  • the printing material 5 is located on the cylinder lift.
  • the cutting blade 10 or its cutting edge 10a penetrates through the printing substrate 5 and the cylinder winding 13 as far as the surface 4a.
  • FIG. 3 shows the punching blade 10 '(horizontally offset for the sake of visibility) in a further vertical position in which the punching knife has again removed from the surface 4a.
  • the cutting edge 10a at least partially releases the groove 15
  • air can pass under the cutting edge into the interior of the closed mold 11.
  • the detachment of the piece of material 6 is supported by the cylinder lift 13.
  • the guiding of air between the cylinder winding 13 and snippet 6 is advantageous because such snippets often adhere firmly to the cylinder elevator.
  • FIGS. 4a to 4c different embodiments a to c of the first guide element 14 and / or preferred webs 14 are shown.
  • the punching blade 10 is formed substantially circular and the suction port 12 is centrally located to the center of the circular blade.
  • the webs 14 start from the suction opening 12, but not purely radially, but curved.
  • the ends of the webs 14 do not touch the punching knife 10, but have a distance 18 to the punching knife.
  • the provision of such a distance facilitates the manufacture of the punching blade by etching and subsequent machining with a milling head.
  • the milling head can be guided precisely along the contour of the punching blade 10 and the contour of the web 14.
  • the suction opening 12 is centrally and the webs 14 extend exactly radially, wherein a distance 18 is maintained.
  • the suction opening 12 is not located centrally, but in the printing material conveying direction closer to the punching blade 10 and the webs 14 extend substantially parallel to each other and transverse to the conveying direction and maintain a distance from the punching knife.
  • the suction opening 12 may also be formed as a slot or a hole with an arbitrary contour, in particular in embodiment c.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)
EP18181811.3A 2017-08-02 2018-07-05 Rotationsstanze zum ausstanzen eines materialstücks aus einem bedruckstoff Pending EP3437815A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017213389.9A DE102017213389B4 (de) 2017-08-02 2017-08-02 Rotationsstanze zum Ausstanzen eines Materialstücks aus einem Bedruckstoff

Publications (1)

Publication Number Publication Date
EP3437815A1 true EP3437815A1 (de) 2019-02-06

Family

ID=62874601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18181811.3A Pending EP3437815A1 (de) 2017-08-02 2018-07-05 Rotationsstanze zum ausstanzen eines materialstücks aus einem bedruckstoff

Country Status (6)

Country Link
US (1) US10434676B2 (ja)
EP (1) EP3437815A1 (ja)
JP (1) JP6423122B1 (ja)
CN (1) CN109382870B (ja)
CA (1) CA3011052C (ja)
DE (1) DE102017213389B4 (ja)

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DE102004058599B4 (de) * 2003-11-26 2013-09-05 Ebe Hesterman Vorrichtung zur veredelnden Bearbeitung von bogenförmigen Substraten
DE102013015354A1 (de) * 2013-09-17 2015-03-19 Heidelberger Druckmaschinen Ag Rotationsstanzvorrichtung, insbesondere in einer Druckmaschine
DE102015223110A1 (de) * 2015-11-23 2017-05-24 Koenig & Bauer Ag Vorrichtung und Verfahren zum Behandeln von Substraten

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US20190039257A1 (en) 2019-02-07
JP6423122B1 (ja) 2018-11-14
JP2019034405A (ja) 2019-03-07
US10434676B2 (en) 2019-10-08
CN109382870B (zh) 2021-03-23
CA3011052C (en) 2020-03-24
DE102017213389A1 (de) 2019-02-07
DE102017213389B4 (de) 2022-07-28
CA3011052A1 (en) 2019-02-02

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