EP1131208A1 - Dispositif d'alimentation en air comprime d'une imprimeuse ou d'un dispositif de maniement de feuilles - Google Patents

Dispositif d'alimentation en air comprime d'une imprimeuse ou d'un dispositif de maniement de feuilles

Info

Publication number
EP1131208A1
EP1131208A1 EP00960496A EP00960496A EP1131208A1 EP 1131208 A1 EP1131208 A1 EP 1131208A1 EP 00960496 A EP00960496 A EP 00960496A EP 00960496 A EP00960496 A EP 00960496A EP 1131208 A1 EP1131208 A1 EP 1131208A1
Authority
EP
European Patent Office
Prior art keywords
air
air supply
pump
cabinet
cold
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Withdrawn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
EP00960496A
Other languages
German (de)
English (en)
Inventor
Klaus Strobl
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.)
Baldwin Germany GmbH
Original Assignee
Baldwin Grafotec GmbH
Baldwin Germany GmbH
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 Baldwin Grafotec GmbH, Baldwin Germany GmbH filed Critical Baldwin Grafotec GmbH
Publication of EP1131208A1 publication Critical patent/EP1131208A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B41F23/0476—Cooling

Definitions

  • Compressed air supply device of a printing press or a Bo ⁇ en handling device Compressed air supply device of a printing press or a Bo ⁇ en handling device
  • the invention relates to a compressed air supply device of a printing press or a sheet handling device according to the preamble of claim 1.
  • Such a compressed air supply device is known from DE 295 03 245 Ul. Further compressed air supply devices are known from DE 197 42 827 C2, DE 298 05 066 Ul, DE 298 19 202 Ul and DE 196 35 075 AI.
  • the air is used in web-fed printing machines (continuous webs) and in sheet-fed printing machines for paper web guidance and for the pneumatic actuation of machine parts.
  • the invention relates in particular to a compressed air supply device of a sheet handling device for handling printing or coating sheets with compressed air before, during or after the Printing or coating these sheets.
  • the compressed air supply device contains at least one air pump for supplying air to the sheet handling device.
  • the air pump can be a so-called pump, compressor, fan or blower. "Handling" the sheets with compressed air means, depending on the embodiment of the sheet handling device, to transport, guide and / or turn the sheets.
  • Prior art compressed air supply devices include air pumps housed in an air supply cabinet that draw air from the outside environment of the air supply cabinet and deliver it at elevated pressure to the sheet handling device, where the air flows onto the sheets for transporting, guiding or turning .
  • the air supply cabinet is often in a relatively warm room, in particular the room in which there is also a printing press, by means of which the air in the room is heated. This relatively warm air flows through the air pumps to the sheet handling device.
  • the coating can be a color or a translucent top layer, for example a gloss layer for prints or colors.
  • the object of the invention is to avoid warping of the sheets and other disadvantages which would occur due to temperature fluctuations of the sheets before, during or after printing.
  • a heat exchanger for cooling this air is provided in the air supply path on which the air flows into the suction side of the at least one air pump.
  • the air is cooled to a temperature which, on the one hand, is favorable for printing or coating the sheets and, on the other hand, largely prevents the sheets from being distorted by temperature changes. This also prevents the printing or coating ink from chipping.
  • FIG. 1 schematically shows a compressed air supply device according to the invention for a sheet handling device
  • Compressed air supply device according to the invention. 3 schematically shows an air supply cabinet of a compressed air supply device according to the prior art
  • Fig. 4 schematically shows another embodiment of an air supply cabinet of a compressed air supply device according to the prior art.
  • the compressed air supply device 2 according to the invention for a sheet handling device 4 shown in FIG. 1 consists of an air supply cabinet 6 and a refrigeration machine 8, which can be arranged on or in the air supply cabinet 6.
  • the refrigeration machine 8 generates refrigeration by evaporating a refrigerant in a refrigeration cycle 10.
  • the refrigerant circuit 10 contains, for example in succession in the flow direction, a condenser 14, a preferably controllable throttle device 16 and an evaporator.
  • the evaporator is designed as a heat exchanger 18, through which the refrigerant cooled by expansion flows and which is arranged in an air path 20 in order to cool warm ambient air 22, which is conveyed over the outer surface of the heat exchanger 18 by an air supply pump 24.
  • the air supply pump can, according to FIG. 1, be arranged downstream of the heat exchanger 18 or, as indicated by broken lines 18-2, upstream of the heat exchanger 18. At least one air pump 26 is arranged in the air supply cabinet 6.
  • a plurality of air pumps 26 are preferably arranged side by side and one above the other, six such air pumps 26 being shown as an example in FIG. 1.
  • Each air pump 26 has a suction side 30, which is open in the interior 6-2 of the air supply cabinet 6, for drawing air therefrom, and a pressure side 32, which is connected to one or more compressed air outlets, for example nozzles 34 of the sheet handling device 4 by a compressed air line 32-1 ,
  • the sheet handling device 4 contains mechanical means 36 for transporting, guiding or turning sheets 38 made of paper, plastic or another material, which are very thin and therefore flexible. This transporting, guiding and / or turning can be supported by the compressed air of the air pumps 8, which flows out at the outlet openings or nozzles 34, or carried out instead of the mechanical means 36, as is known from the prior art.
  • the air 40 cooled by the refrigerant of the heat exchanger 18 (evaporator) is introduced by the air supply pump 24 through a cold air duct 42 into the interior 6-2 of the air supply cabinet 6 at a point which lies above the air pumps 26 and their suction side 30.
  • the cold air duct 42 has a line section 44 extending above the air pumps 26 over the horizontal cross section of the interior 6-2, in which a multiplicity of outlet openings 46 are formed, from which the cold air 40 flows from top to bottom Interior 6-2 of the air supply cabinet 6 flows over the air pumps 26 and is sucked into the air pumps 26 on the suction side 30 thereof.
  • the temperature of the cold air 40 can be set by setting the cooling capacity of the refrigerator 8 or in another way in the cold air duct 42 to a value which is advantageous for printing or coating the sheets and for avoiding undesired deformation of the sheets is.
  • This advantage is particularly important when the air supply cabinet 6 is in the press room of a printing press, where the warm outside air 22 of the air supply cabinet 6 is significantly warmer than the normal room temperature of 20 ° C., for example.
  • the cold air 40 also cools the air pumps 26, so that their electrical drive energy cannot heat the cold air 40 in these air pumps 26 or can only heat them to an insignificant extent. Warm air tends to rise and cold air tends to fall in the opposite direction.
  • the pressure of the cold air 40 in the interior 6-2 of the air supply cabinet 6 is set by the air supply pump 24 to a higher value than that Outside ambient pressure of the air supply cabinet 6. This avoids that the air pumps 26 can suck warm outside ambient air 22 into the interior 6-2 through openings or leaks in the air supply cabinet 40.
  • the interior 6-2 of the air supply cabinet 6 is essentially closed. It preferably has, at a distance below the suction side 30 of the lowermost air pumps 26, air outlet openings 52 for discharging cold air 40 from the interior 6-2, insofar as the cold air 40 is not required by the air pumps 26 to supply the sheet handling device 4 easily possible to maintain a substantially constant cold air pressure in the interior 6-2 of the air supply cabinet 6, even if alternately different numbers of air pumps 26 are switched on or off with constant air supply by the air supply pump 24 or these air pumps 26 can be switched to differently sized cold air flow rates are. Furthermore, these air outlet openings 52 at the lower end of the air supply cabinet 6 have the advantage that no "heat accumulation" can form at any point in the interior 6-2, but rather an approximately uniformly distributed temperature prevails.
  • the same parts as in Fig. 1 are provided with the same reference numerals.
  • the only difference is that the warm air 22 sucked in from the outside by the air supply pump 24 does not, as in FIG. 1, via the cold-emitting cooling surfaces 18 of the Refrigerant circuit 10 flows, for example over the cold-emitting surfaces of the evaporator 18, but over the cooling surfaces of a heat exchanger 118 of a coolant circuit 110, which is in heat exchange with the refrigerant cooling surfaces of the refrigerant circuit 10 via an additional heat exchanger 18-2.
  • fans 62 are arranged in the upper part 60 of an air supply cabinet 6-2, which suck in warm air 22 sucked in via air inlet openings 64 in a lower cabinet part and, insofar as they do not come from the interior 6-2 by the air pumps 26 is sucked off, returned as exhaust air 22-2 to the outside environment.
  • the air pumps 26 thus convey the warm outside air 22, additionally heated by the drive energy heat of the air pumps 26, to the sheet handling device 4 at a relatively high temperature.
  • the air pumps 26 are also accommodated in an air supply cabinet 6-3, but they do not suck the warm outside ambient air 22 out of this air supply cabinet, but via suction lines 30-2 from the outside environment.
  • the internal cabinet air 206-2 is circulated by a blower 224 via a heat exchanger 218 of a coolant circuit 210 for cooling the air pumps 26 which heat up from their electrical drive energy.
  • the cold air 40 can have any temperature in the air supply cabinet, e.g. Have 6 ° C, which is below the ambient ambient temperature, without 6 condensation occurring in the interior 6-2 of the air supply cabinet. This is because at least some of the cold air 40 is continuously drawn off by the air pumps 26.
  • the air supply cabinet 206 of the prior art according to FIG. 4 the more condensation water would occur, the lower the temperature in the cabinet interior 6-2 is cooled below the temperature of the outside environment.
  • cold air 40 contains less moisture than warm air 22, the cold air 40 of the invention has no disadvantageous influence of moisture on the sheets 38 to be handled.
  • the invention offers a simple possibility to filter the air 22, 40, for example to clean it of paper dust and earth dust before it gets into the air supply cabinet 6 and there into the suction side of the air pumps 26.
  • Such an air filter can be arranged in the cold air duct 42 or at the beginning or end thereof or at an air inlet opening of a cabinet in which the refrigerator 8 is arranged.
  • the refrigeration machine 8 enables a precisely adjustable, controllable or regulatable refrigeration or cooling of the warm air 22. Since cold air is a smaller one Having air that is denser than warm air, smaller air pumps 26 or air pumps 26 with a smaller delivery capacity than in the prior art can be used according to the invention.
  • the cold air 40 of the invention has a temperature in the range between 1 ° C. and 14 ° C., preferably in the range between 4 ° C. and 8 ° C., ie approximately 6 ° C., when it flows into the air supply cabinet 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

L'invention concerne un dispositif d'alimentation en air comprimé (6, 8) d'une imprimeuse ou d'un dispositif de maniement de feuilles. Le dispositif selon l'invention comporte un dispositif de refroidissement (8) destiné au refroidissement de l'air aspiré par des pompes à air (26), cet air étant convoyé par ces pompes à air vers l'imprimeuse ou vers le dispositif de maniement de feuilles pour l'actionnement pneumatique des parties de machine, ou pour le transport, le guidage ou le retournement de feuilles de papier ou d'un autre matériau, devant être imprimées ou devant être revêtues, ou imprimées ou revêtues.
EP00960496A 1999-09-22 2000-08-19 Dispositif d'alimentation en air comprime d'une imprimeuse ou d'un dispositif de maniement de feuilles Withdrawn EP1131208A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19945272 1999-09-22
DE1999145272 DE19945272B4 (de) 1999-09-22 1999-09-22 Druckluftversorgungseinrichtung einer Druckmaschine oder einer Bogen-Handhabungsvorrichtung
PCT/EP2000/008113 WO2001021404A1 (fr) 1999-09-22 2000-08-19 Dispositif d'alimentation en air comprime d'une imprimeuse ou d'un dispositif de maniement de feuilles

Publications (1)

Publication Number Publication Date
EP1131208A1 true EP1131208A1 (fr) 2001-09-12

Family

ID=7922813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00960496A Withdrawn EP1131208A1 (fr) 1999-09-22 2000-08-19 Dispositif d'alimentation en air comprime d'une imprimeuse ou d'un dispositif de maniement de feuilles

Country Status (5)

Country Link
EP (1) EP1131208A1 (fr)
JP (1) JP2003509255A (fr)
CN (1) CN1335808A (fr)
DE (1) DE19945272B4 (fr)
WO (1) WO2001021404A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123489B4 (de) * 2001-05-15 2009-04-02 Goss Contiweb B.V. Vorrichtung zum Kühlen einer Materialbahn
DE10150041B4 (de) * 2001-10-10 2006-06-01 Platsch Gmbh & Co.Kg Austrag-Kühleinrichtung für eine Druckmaschine
JP2007229969A (ja) * 2006-02-28 2007-09-13 Mitsubishi Heavy Ind Ltd 印刷機
DE102007052382A1 (de) * 2007-10-31 2009-05-07 Heidelberger Druckmaschinen Ag Bedieneinrichtung zur Steuerung von Luftdosiervorrichtungen in Druckmaschinen
DE102008036755A1 (de) 2008-08-07 2010-02-11 Baldwin Germany Gmbh Schaltschrank
DE102012003270A1 (de) * 2012-02-16 2013-08-22 Heidelberger Druckmaschinen Ag Vorrichtung zum Transport und/oder Ausrichten eines Bogens
CN105564023A (zh) * 2016-03-09 2016-05-11 苏州华策纺织科技有限公司 一种圆网印花机落布冷却装置
DE102017004053A1 (de) 2017-04-26 2018-10-31 Giesecke+Devrient Currency Technology Gmbh Verhindern einer Übertragung frischer Druckfarbe auf die Rückseite anderer Bögen beim Bogenstichtiefdruck

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324130C2 (de) * 1983-07-05 1986-04-10 Franz 4834 Harsewinkel Böhnensieker Verfahren und Vorrichtung zum Trocknen bedruckter oder gefärbter Materialbahnen
DE4326835A1 (de) * 1993-08-10 1995-02-16 Baldwin Gegenheimer Gmbh Temperierungssystem für Druckmaschinenzylinder
DE29503245U1 (de) * 1995-02-27 1995-04-06 Roland Man Druckmasch Luftversorgungseinrichtung für eine Rotationsdruckmaschine
DE19635075A1 (de) * 1996-08-30 1998-03-05 Maul & Co Chr Belser Gmbh Verfahren und Vorrichtung zur Reinigung und Wiederverwendung von Abluft
DE19742827C2 (de) * 1997-09-27 1999-07-15 Koenig & Bauer Ag Luftversorgungseinrichtung für Baugruppen in Druckmaschinen
DE29805066U1 (de) * 1998-03-20 1998-05-28 Roland Man Druckmasch Blasluftversorgung für eine Druckmaschine
DE29819202U1 (de) * 1998-10-28 1999-02-11 Vits Maschinenbau Gmbh Vorrichtung zum Trocknen und Kühlen frisch bedruckter Papierbahnen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0121404A1 *

Also Published As

Publication number Publication date
JP2003509255A (ja) 2003-03-11
CN1335808A (zh) 2002-02-13
DE19945272B4 (de) 2004-03-11
DE19945272A1 (de) 2001-06-28
WO2001021404A1 (fr) 2001-03-29

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