EP0468254A2 - Dispositif de coupe transversale pour des bandes imprimées - Google Patents

Dispositif de coupe transversale pour des bandes imprimées Download PDF

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Publication number
EP0468254A2
EP0468254A2 EP91111231A EP91111231A EP0468254A2 EP 0468254 A2 EP0468254 A2 EP 0468254A2 EP 91111231 A EP91111231 A EP 91111231A EP 91111231 A EP91111231 A EP 91111231A EP 0468254 A2 EP0468254 A2 EP 0468254A2
Authority
EP
European Patent Office
Prior art keywords
suction
knives
knife roller
blowing
knife
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
EP91111231A
Other languages
German (de)
English (en)
Other versions
EP0468254A3 (en
EP0468254B1 (fr
Inventor
Hilmar Vits
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 EP0468254A2 publication Critical patent/EP0468254A2/fr
Publication of EP0468254A3 publication Critical patent/EP0468254A3/de
Application granted granted Critical
Publication of EP0468254B1 publication Critical patent/EP0468254B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B26D7/18—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

Definitions

  • the invention relates to a cross cutter for material webs provided with printed images, consisting of a knife roller equipped with at least one pair of parallel knives and a stationary counter knife as well as a discharge device operated with suction air for the waste strips resulting from the pair of knives during cross cutting.
  • the knife roller has a slot between each pair of parallel knives, into which the waste strip is sucked in and pneumatically discharged through a hollow roller pin.
  • Such a cross cutter has not proven itself in practice because it can easily lead to blockages in the discharge channel.
  • An increase in the cross-section of the discharge channel that reduces the risk of clogging is countered by the associated reduction in the stability of the knife roller. This applies in particular to the case where the knife roller is equipped with two pairs of parallel knives.
  • the hardened, smooth, synchronous counter-roller is assigned to the cutter block equipped with a pair of parallel cutters. This is studded with protruding needles, which pierce the material web so that the waste strip is held by them and is stripped on the opposite side by stationary teeth of a comb.
  • the invention has for its object to provide a cross cutter for material webs provided with printed images of the type mentioned, with which the resulting waste strips can be removed without problems with high performance without great expenditure on device technology.
  • the discharge device between the knives of each pair of knives has suction and blowing openings which alternate with a blowing and a via a channel running through the knife roller by means of a valve control as a function of the angle of rotation of the rotating knife roller
  • Suction air source can be connected in such a way that the suction and blowing openings are connected to the suction air source during the cut and to the blown air source in a rotating region rotated to the rotational position of the cut, in which a suction hood for the waste strips repelled by the blown air is arranged above the knife roller
  • the valve control is arranged on the face of the knife roller and stationary, rotatably offset inlets and outlets of the suction and blown air sources and at least one alternately sweeping over them Connection of the channel leading to and from the suction and blown air openings.
  • the inlet is preferably arranged on one end face of the knife roller and the outlet on the other end face, and each channel has a connection on both end
  • the waste strips accumulating between the knives of a pair of knives are safely removed from the processing process even at high outputs, because it is possible by means of the valve control to apply a high vacuum and a high overpressure of the suction and blowing air source to the suction and blowing air openings lay.
  • the switching operations of the valve control with rapid pressure build-up and reduction required for the cross cutter to be used in printing plants can be mastered without any problems with special training of the valve control. With 30 print images per second, 60 air changes per second are necessary. If you start by 1/3 of a turn for the valve control switchover, there is a period of a few milliseconds for the pressure build-up and release. With the changeover derived from the relative movement of the knife roller and fixed inlets and outlets of the suction and blown air sources, this requirement can be met with certainty.
  • the suction hood has blowing air-operated floating nozzles on the inside with a conveying effect.
  • the waste strips can be protected against unintentional detachment by providing support levels set back between the knives and their cutting edges.
  • the knives have a certain shielding function for the waste strips.
  • a material web 1 provided with printed images is fed via a suspension table 2 to a cross cutter which consists of a rotating knife roller 3 with two pairs of parallel knives 4a, 4b and a stationary counter knife 5 with a knife 4c. Between the knives 4a, 4b there is a series of suction and blowing openings 9, which can be alternately connected to a suction and blowing air source via radial channels 17 in a manner to be described, depending on the rotational position of the knife roller 3.
  • the knife 4a In the position of the knife roller 3 shown in FIG. 1, the knife 4a has just cut a sheet 6 with the printed image with the knife 4c from the material web 1, which sheet is removed via a floating table 7. A waste strip 8 which is still to be cut is held by the suction and blowing openings 9 which are subjected to negative pressure.
  • the knife 4b cuts off the waste strip 8 together with the knife 4c. This remains attached to the suction and blowing openings 9 until the suction and blowing openings are disconnected from the suction air source and connected to the blowing air source. This happens after at least 1/4 and at most 1/2, in particular 1/3, rotation of the knife roller 3 from the cutting position.
  • a suction hood 12 is arranged above the knife roller 3 and is equipped with a conveying effect in the direction of arrow 11, 14 to form blown air nozzles 13 arranged on the inside.
  • the knife roller 3 has webs 10, on the sides of which the knives 4a, 4b are fastened by means of screws 21a, 21. Via these recesses 22, the screws 21 a, 21 b are easily accessible for assembly purposes.
  • the cutouts 22 are covered by shells 23.
  • the webs 10 carry the suction and blowing openings 9, which consist of suction cups 9a and holding, axially pierced fastening screws 9b.
  • the axial channel of the fastening screws 9b opens into the channel 17, which in turn opens into an axial groove 16a of a rod 15 which is seated in a central bore in the knife roller 3.
  • two axial grooves 16a, 16b are arranged in the rod 15. They are sealed off from one another by sealing strips which are seated in grooves 18 and acted upon by an elastic hose.
  • connections 27a, 27b are provided at the ends at the ends of both channels 16a, 16b, which lie tightly against a stationary distributor plate 25a, 25b with an inlet 26a and an outlet 26b.
  • the inlets and outlets 26a, 26b are rotatably offset from one another in such a way that, when the suction and blowing openings 9 are in the cutting position, they have the inlets 26a for suction air (see FIG. 4 below) and the suction and blowing openings 9 which are not in the cutting position are connected to the Outlets 26b for blown air (see FIG. 4 above) are connected.
  • the rotational displacement of the inlets and outlets 26a, 26b is such that, on the one hand, the waste strips are held long enough and, on the other hand, are blown off sufficiently early for removal. This can mean that the inlets and outlets 26a, 26b must not be diametrically opposite.
  • the stationary distributor plates 25a, 25b are screwed onto hollow pins 24a, 24b, which in turn are connected to the suction and pressure medium sources with lines.
  • the stationary hollow pins 24a, 24b are mounted by means of bearings 28a, 28b in a hollow bearing pin 3a of the knife roller 3.
  • the pressure required for sealing between the distributor plate 25a and the connections 27a, 27b is applied by a spring 30 which is supported on the one hand on a threaded ring 29 seated in the hollow pin 3a and on the other hand on the hollow pin 24b designed as an angular contact ball bearing 28b.
  • a centrifugal force of 180 g acts on a 1 m wide waste strip with a weight of 2 g.
  • the holding force on the suction cups 9a of 10 mm inner diameter in 30 mm division is 1250 g and the repelling force of the blowing openings 9 b of 2 mm diameter is 50 g.
EP91111231A 1990-07-21 1991-07-05 Dispositif de coupe transversale pour des bandes imprimées Expired - Lifetime EP0468254B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023257A DE4023257C2 (de) 1990-07-21 1990-07-21 Querschneider für mit Druckbildern versehene Materialbahnen
DE4023257 1990-07-21

Publications (3)

Publication Number Publication Date
EP0468254A2 true EP0468254A2 (fr) 1992-01-29
EP0468254A3 EP0468254A3 (en) 1992-03-18
EP0468254B1 EP0468254B1 (fr) 1995-02-22

Family

ID=6410770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91111231A Expired - Lifetime EP0468254B1 (fr) 1990-07-21 1991-07-05 Dispositif de coupe transversale pour des bandes imprimées

Country Status (4)

Country Link
EP (1) EP0468254B1 (fr)
JP (1) JPH0725057B2 (fr)
AT (1) ATE118718T1 (fr)
DE (2) DE4023257C2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023215A1 (fr) * 1992-05-18 1993-11-25 Gronbjerg Ib Machine pour decouper du papier en continu en feuilles, avec decoupage simultane d'une bande transversale
EP0586876A1 (fr) * 1992-09-05 1994-03-16 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour la séparation controlée de déchets à partir d'un matériau imprimé
WO1994014583A1 (fr) * 1992-12-24 1994-07-07 Molins Plc Appareil a couper des bandes
EP0668132A1 (fr) * 1994-02-18 1995-08-23 Paper Converting Machine Company Procédé et dispositif pour l'enlèvement de déchets dans une scie
WO1995028261A1 (fr) * 1994-04-13 1995-10-26 Winkler & Dünnebier Emporte-piece souple et cylindre-support
WO1995033652A1 (fr) * 1994-06-08 1995-12-14 Bruno Losi Procede et appareil de separation des films de protection d'avec des etiquettes adhesives
CN105398859A (zh) * 2015-12-15 2016-03-16 无锡宝南机器制造有限公司 数码书刊折页机旋转裁刀吹气结构
CN114102750A (zh) * 2021-12-03 2022-03-01 苏州艾美瑞光电科技有限公司 键盘遮光体打孔装置及打孔方法

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595773B1 (fr) * 1992-10-30 1996-12-27 Grapha-Holding Ag Dispositif pour produire des feuilles à format égal de bandes en matériau
DE19532027A1 (de) * 1995-08-31 1997-03-06 Koenig & Bauer Albert Ag Verfahren und Vorrichtung zum Entfernen von auf Punkturnadeln befindlichen Beschnittstreifen
DE10004305A1 (de) * 2000-02-01 2001-08-02 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zur Entfernung von Partikeln von Materialbahnen
EP1125646B1 (fr) 2000-02-01 2003-08-06 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour enlever des particules de bandes
DE102004051143B4 (de) * 2004-10-20 2006-09-21 Maschinenfabrik Wifag Falzvorrichtung für eine Rollen-Rotationsdruckmaschine
DE202015008522U1 (de) * 2015-12-14 2016-01-19 Harro Höfliger Verpackungsmaschinen GmbH Vorrichtung zum Herauslösen von Teilbereichen aus einer Materialbahn
IT201700081301A1 (it) * 2017-07-18 2019-01-18 Tecnau Srl Equipaggiamento e metodo di taglio trasversale per strisce di rifilatura
CN111531604A (zh) * 2020-05-07 2020-08-14 黄碧芳 一种塑料加工用自动切管机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392916A1 (fr) * 1977-05-31 1978-12-29 Chambre Imprimerie Claude Dispositif pour effectuer des decoupages dans une bande de materiau defilant en continu
WO1982000970A1 (fr) * 1980-09-15 1982-04-01 In Line Inc Blava Dispositif servant a decouper en continu et a eliminer des tranches etroites d'une bande imprimee
EP0412383A2 (fr) * 1989-08-11 1991-02-13 Jos. Hunkeler AG Papierverarbeitungsmaschinen Dispositif pour couper et enlever des déchets d'une bande en mouvement

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548696A (en) * 1968-06-27 1970-12-22 Smithe Machine Co Inc F L Chip removal apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2392916A1 (fr) * 1977-05-31 1978-12-29 Chambre Imprimerie Claude Dispositif pour effectuer des decoupages dans une bande de materiau defilant en continu
WO1982000970A1 (fr) * 1980-09-15 1982-04-01 In Line Inc Blava Dispositif servant a decouper en continu et a eliminer des tranches etroites d'une bande imprimee
EP0412383A2 (fr) * 1989-08-11 1991-02-13 Jos. Hunkeler AG Papierverarbeitungsmaschinen Dispositif pour couper et enlever des déchets d'une bande en mouvement

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993023215A1 (fr) * 1992-05-18 1993-11-25 Gronbjerg Ib Machine pour decouper du papier en continu en feuilles, avec decoupage simultane d'une bande transversale
US5609084A (en) * 1992-05-18 1997-03-11 Gronbjerg; Ib Machine for cutting a paper web into sheets with simultaneous cutting of a transverse strip
EP0586876A1 (fr) * 1992-09-05 1994-03-16 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif pour la séparation controlée de déchets à partir d'un matériau imprimé
US5419224A (en) * 1992-09-05 1995-05-30 Heidelberger Druckmaschinen Ag Device for the controlled removal of pieces of waste material
CN1036903C (zh) * 1992-09-05 1998-01-07 海德堡印刷机械股份公司 用于控制印刷材料的废料件清除的装置
WO1994014583A1 (fr) * 1992-12-24 1994-07-07 Molins Plc Appareil a couper des bandes
EP0668132A1 (fr) * 1994-02-18 1995-08-23 Paper Converting Machine Company Procédé et dispositif pour l'enlèvement de déchets dans une scie
WO1995028261A1 (fr) * 1994-04-13 1995-10-26 Winkler & Dünnebier Emporte-piece souple et cylindre-support
WO1995033652A1 (fr) * 1994-06-08 1995-12-14 Bruno Losi Procede et appareil de separation des films de protection d'avec des etiquettes adhesives
CN105398859A (zh) * 2015-12-15 2016-03-16 无锡宝南机器制造有限公司 数码书刊折页机旋转裁刀吹气结构
CN114102750A (zh) * 2021-12-03 2022-03-01 苏州艾美瑞光电科技有限公司 键盘遮光体打孔装置及打孔方法

Also Published As

Publication number Publication date
ATE118718T1 (de) 1995-03-15
EP0468254A3 (en) 1992-03-18
DE59104663D1 (de) 1995-03-30
DE4023257A1 (de) 1992-01-23
JPH04256598A (ja) 1992-09-11
DE4023257C2 (de) 1993-12-02
JPH0725057B2 (ja) 1995-03-22
EP0468254B1 (fr) 1995-02-22

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