EP0103876A2 - Dispositif de soufflage pour une machine à imprimer en particulier pour une rotative à héliogravure - Google Patents

Dispositif de soufflage pour une machine à imprimer en particulier pour une rotative à héliogravure Download PDF

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Publication number
EP0103876A2
EP0103876A2 EP83109225A EP83109225A EP0103876A2 EP 0103876 A2 EP0103876 A2 EP 0103876A2 EP 83109225 A EP83109225 A EP 83109225A EP 83109225 A EP83109225 A EP 83109225A EP 0103876 A2 EP0103876 A2 EP 0103876A2
Authority
EP
European Patent Office
Prior art keywords
ventilation
nozzles
hood
air
round
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Withdrawn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
EP83109225A
Other languages
German (de)
English (en)
Other versions
EP0103876A3 (fr
Inventor
Giuseppe Fantoni
Ezio Derivi
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.)
Officine Meccaniche Giovanni Cerutti SpA
Original Assignee
Officine Meccaniche Giovanni Cerutti SpA
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 Officine Meccaniche Giovanni Cerutti SpA filed Critical Officine Meccaniche Giovanni Cerutti SpA
Publication of EP0103876A2 publication Critical patent/EP0103876A2/fr
Publication of EP0103876A3 publication Critical patent/EP0103876A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
    • F26B21/50—Ducting arrangements from the source of air or other gases to the materials or objects being dried
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air

Definitions

  • the above invention relates to an aeration device for printing machines, especially for a rotogravure printing machine.
  • ventilation devices or ventilation hoods are provided after the printing unit, which have the task of removing the solvent contained in the ink from the printing ink which is applied to a paper tape or another type of tape, for example a plastic tape.
  • These attachment devices are of crucial importance for the production of a high-quality printed product, whereby it must be particularly ensured that by removing the solvent contained in the ink that was applied in the corresponding printing unit, the paper web for further printing treatment in the subsequent printing unit is being prepared.
  • Hoods have also become known which use slot nozzles instead of circular bores which are transverse to the moving ones Paper web are arranged.
  • the main disadvantage of these slot nozzles consists primarily in the fact that the air flow emerging from the slot nozzle very easily influences the even movement of the paper tape due to its kinetic energy content. Furthermore, the production of slot nozzles with a very narrow cross-section has proven to be technically difficult to carry out.
  • the object of the above invention is to avoid the disadvantages of the prior art and to propose a new ventilation hood of the type mentioned which, if it is fed with the same amount of energy which has been used up to now in the form of hot air, leads to a substantially higher ventilation effect than this was possible with the previously usual ventilation hoods, or that it is already possible to achieve the previously known ventilation results that can be achieved with the conventional hoods and in this case to significantly reduce the energy requirement.
  • the ventilation hood has several ventilation sections, which consist of several rows of circular nozzles, which alternate with at least one slot-shaped slot nozzle arranged transversely to the paper web.
  • two rows of circular nozzles are arranged symmetrically on both sides of a slot nozzle. It has certainly also proven advantageous that the circular Nozzles in a row, offset in the transverse direction from the round nozzles of the adjacent row.
  • the perforated nozzles and the slotted nozzle (s) are particularly advantageously introduced into a thin metal plate by means of a punching process, which is operatively connected to a suitable holding device and is arranged on the ventilation hood.
  • the advantage is surprisingly achieved that the desired turbulence, which persists for a very long time due to the air streams emerging from the circular nozzles, is achieved by combining it with the cutting-shaped air stream emerging through the slot nozzles and practically breaking it up and interrupting the boundary layer that has built up on the paper web.
  • both the round nozzles and the slot nozzles can be produced with the desired accuracy by a simple punching process. This leads to much more precise nozzles and ventilation hoods, which used to be e.g. were produced using a welding process.
  • the desired performance of the ventilation hood can already be achieved with a greatly reduced energy expenditure without reducing its efficiency, which results in a cost saving of 30 - 50%.
  • the paper tape 1 moves along a curved roller conveyor 2.
  • a ventilation cap 3 is provided.
  • the ventilation cap consists of a first chamber 3a, which is provided for supplying the heated pleasure.
  • the hood has a second chamber 3b, which is provided for extracting the air enriched with solvent from the paper tape 1.
  • the hood 3 follows the course of the roller conveyor 2, which advantageously has a curved course.
  • the hood 3 has ventilation sections 4, which are caused by the air heated to approximately 120 ° C., which is under pressure in the chamber 3a Is blown paper tape 1, which moves in the direction of arrow (g).
  • the ventilation hood 3 (between two adjacent sections 4 for dit: supplying the ventilation flow) has an indentation 5 which is connected to a suction hole 6 or a suction channel which is connected to the suction chamber 3b.
  • the suction process can also be carried out in the traditional manner, with the provision of suction channels which are provided in a known manner on the front sides of the hood 3.
  • the outlet of the suction chamber 3b is operatively connected to a circuit with a device (not shown) for recovering the solvents.
  • FIG. 2 shows a detail of a ventilation plate 7 is shown in view.
  • the plate 7 is arranged in the ventilation sections 4 of the hood 3.
  • the plate 7 shown in Fig. 2 is shown in a view according to arrow (f) of Fig. 1, and the air stream emerging from it acts on the paper web 1, which moves in the direction of arrow (g).
  • the plate 7 is advantageously made from stamped sheet metal and can be operatively connected to the corresponding receptacles of the ventilation section 4 in a simple manner.
  • the ventilation plate 7 has ventilation bores 8 which have a diameter of approximately 1-3 mm.
  • the bores 8 are provided in rows arranged parallel to one another and offset from each other in the transverse direction.
  • the plate 7 is interrupted by a punch 9 in the form of a transverse slot nozzle with a width of 1-3 mm.
  • a punch 9 in the form of a transverse slot nozzle with a width of 1-3 mm.
  • small transverse ribs 10 are provided for stiffening the slot nozzle.
  • the hood 3, in accordance with the sections 4, has profiled pieces which are suitable for receiving the ventilation plates 7, or it is provided that the plates 7 are fastened to the ventilation hood 3 by screws.
  • the diagram according to FIG. 3 shows two characteristic curves which represent the concentration of the solvent in the air sucked in through two hoods 3.
  • the hoods 3 are arranged along the paper web at certain intervals from the printing unit. Does the line 11 illustrated by solidturnzuegen the course of the solvent concentration, conventionally in two hoods 3 type were measured, whereas the continuous line 12 with S t rich dotted lines the course of the solvent concentration in
  • the diagram according to FIG. 3 can consequently clearly show that a larger amount of solvent can be removed from the printing ink by applying the inventive concept described, and this thanks to the combination of round ventilation nozzles 8 with one or more slotted nozzles 9.
  • Air is drawn in from the free atmosphere by means of a line 14 via a fan 13. This air is heated in a heating battery 15. The air heated to approximately 120 ° C. is supplied to the chamber 3a of the ventilation hood 3, and the air streams emerge from the ventilation zones 4 and act on the paper tape 1 which moves in the direction indicated by the arrow (g).
  • the suction chamber 3b is operatively connected via a line 16 to a known device (R) for the recovery of the solvent.
  • the ventilation chamber 3a of the second hood 3 is connected via a further fan 17, which conducts heated air via a line 18 into a further heating battery 19. At the same time, the ventilation chamber 3a additionally draws in a certain amount of air Q from the free environment.
  • the blow-out line 20, which emerges from the chamber 3b, does not extend in the usual way into a further device for recovering the solvent, but this line 20 unites once with the feed line 18, which is assigned to the fan 17, and furthermore it unites line is associated via a line 20a to the feed line 14, the first H ube d the fan 13.
  • advantageously controllable flaps 21 and 22 are provided, which serve to regulate and to shut off the air flow.
  • the fans 13, 17 could of course also be arranged in front of the heating batteries 15 and 19.
  • a branch 16 ′ is provided in this line, which is connected to line 16 via a flap 40 before this line enters the heating battery 15.
  • d d d ss eg n ch two parallel Duesengoln 8 a slot nozzle 9 is provided which extends transversely to the direction (g) of the paper tape.
  • the second ventilation hood Furthermore, due to the surprising and effective absorption of solvent by the ventilation air, which already occurs in the first ventilation hood, it becomes possible for the first time to connect the second ventilation hood to a recovery device via a closed air circuit 5 and partially the heated air. the second hood also to be used in the first ventilation hood 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
EP83109225A 1982-09-22 1983-09-17 Dispositif de soufflage pour une machine à imprimer en particulier pour une rotative à héliogravure Withdrawn EP0103876A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23379/82A IT1153853B (it) 1982-09-22 1982-09-22 Dispositivo di ventilazione per macchine da stampa, in particolare per macchine rotative a rotocalco
IT2337982 1982-09-22

Publications (2)

Publication Number Publication Date
EP0103876A2 true EP0103876A2 (fr) 1984-03-28
EP0103876A3 EP0103876A3 (fr) 1985-05-15

Family

ID=11206562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109225A Withdrawn EP0103876A3 (fr) 1982-09-22 1983-09-17 Dispositif de soufflage pour une machine à imprimer en particulier pour une rotative à héliogravure

Country Status (3)

Country Link
EP (1) EP0103876A3 (fr)
JP (1) JPS5981174A (fr)
IT (1) IT1153853B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538209A1 (fr) * 1991-10-18 1993-04-21 Schiavi Cesare Costruzioni Meccaniche S.P.A. Dispositif de sèchage à l'air chaud d'un film imprimé dans une machine rotative d'impression en creux
EP0670215A1 (fr) * 1994-03-03 1995-09-06 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Dispositif pour sécher des feuilles et des bandes imprimées dans des machines d'impression
WO2017134114A1 (fr) * 2016-02-01 2017-08-10 Windmöller & Hölscher Kg Dispositif et procédé de séchage d'une matière en bande d'une machine d'impression
CN109664604A (zh) * 2019-01-15 2019-04-23 陕西北人印刷机械有限责任公司 一种新型干燥箱装置
WO2019166129A1 (fr) * 2018-02-27 2019-09-06 Bobst Bielefeld Gmbh Sécheur
CN113878998A (zh) * 2020-07-01 2022-01-04 博斯特比勒费尔德有限公司 干燥器单元和印刷机
CN114425905A (zh) * 2021-11-30 2022-05-03 陕西北人印刷机械有限责任公司 印刷机色组风门控制方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60172542A (ja) * 1984-02-17 1985-09-06 Dainippon Printing Co Ltd 乾燥装置
JPH02144431U (fr) * 1989-05-02 1990-12-07
CN107310261A (zh) * 2017-08-29 2017-11-03 林文茂 一种循环再利用凹印环保节能减排热风干燥系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB895655A (en) * 1958-11-04 1962-05-02 Halley & Sons Ltd James Improved apparatus for drying printed webs of material
GB894237A (en) * 1959-07-09 1962-04-18 Ameliorair Soc Improvements in drying apparatus for products in the form of a sheet permeable to gases
FR1398809A (fr) * 1964-03-17 1965-05-14 Ameliorair Sa Séchoir pour produit en feuille soutenu par de l'air
DE2458001C2 (de) * 1974-12-07 1986-08-07 Babcock Textilmaschinen GmbH, 2105 Seevetal Vorrichtung zur Wärmebehandlung von laufenden Warenbahnen

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538209A1 (fr) * 1991-10-18 1993-04-21 Schiavi Cesare Costruzioni Meccaniche S.P.A. Dispositif de sèchage à l'air chaud d'un film imprimé dans une machine rotative d'impression en creux
US5345696A (en) * 1991-10-18 1994-09-13 Schiavi Cesare Costruzioni Meccanichi S.P.A. Device for hot-air drying of a film printed in a rotogravure machine
US5553397A (en) * 1993-03-03 1996-09-10 Koenig & Bauer Aktiengesellschaft Device for drying printed sheets or web in printing presses
EP0670215A1 (fr) * 1994-03-03 1995-09-06 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Dispositif pour sécher des feuilles et des bandes imprimées dans des machines d'impression
WO2017134114A1 (fr) * 2016-02-01 2017-08-10 Windmöller & Hölscher Kg Dispositif et procédé de séchage d'une matière en bande d'une machine d'impression
WO2019166129A1 (fr) * 2018-02-27 2019-09-06 Bobst Bielefeld Gmbh Sécheur
US11559980B2 (en) * 2018-02-27 2023-01-24 Bobst Bielefeld Gmbh Dryer
CN109664604A (zh) * 2019-01-15 2019-04-23 陕西北人印刷机械有限责任公司 一种新型干燥箱装置
CN113878998A (zh) * 2020-07-01 2022-01-04 博斯特比勒费尔德有限公司 干燥器单元和印刷机
EP3932672A1 (fr) * 2020-07-01 2022-01-05 Bobst Bielefeld GmbH Séchoir et machine d'impression
US11458743B2 (en) 2020-07-01 2022-10-04 Bobst Bielefeld Gmbh Dryer unit and printing machine
CN114425905A (zh) * 2021-11-30 2022-05-03 陕西北人印刷机械有限责任公司 印刷机色组风门控制方法

Also Published As

Publication number Publication date
IT8223379A1 (it) 1984-03-22
JPS5981174A (ja) 1984-05-10
IT8223379A0 (it) 1982-09-22
EP0103876A3 (fr) 1985-05-15
IT1153853B (it) 1987-01-21

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