EP3458266B1 - A chill roll for a printing machine - Google Patents

A chill roll for a printing machine Download PDF

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Publication number
EP3458266B1
EP3458266B1 EP17724265.8A EP17724265A EP3458266B1 EP 3458266 B1 EP3458266 B1 EP 3458266B1 EP 17724265 A EP17724265 A EP 17724265A EP 3458266 B1 EP3458266 B1 EP 3458266B1
Authority
EP
European Patent Office
Prior art keywords
chill roll
chamber
roll according
cooling circuit
channels
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.)
Active
Application number
EP17724265.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3458266A1 (en
Inventor
Renzo Melotti
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.)
Bobst Italia SpA
Original Assignee
Bobst Italia SpA
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Publication date
Application filed by Bobst Italia SpA filed Critical Bobst Italia SpA
Publication of EP3458266A1 publication Critical patent/EP3458266A1/en
Application granted granted Critical
Publication of EP3458266B1 publication Critical patent/EP3458266B1/en
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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
    • B41F23/0479—Cooling using chill rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/514—Modifying physical properties
    • B65H2301/5144—Cooling

Definitions

  • the present invention refers to a chill roll with recirculation of water or other suitable fluid used in printing machines, such as in particular rotogravure printing machines.
  • a plurality of printing units or printing stages follow one another. Once a first printing stage is over, before entering the subsequent one the printing support undergoes a drying treatment, pursuant to which the support is directed, via a set of deviation rolls, to the subsequent printing stage.
  • a drying treatment pursuant to which the support is directed, via a set of deviation rolls, to the subsequent printing stage.
  • One or more of these deviation rolls is an idle one and is water-cooled.
  • chill roll This cooled roll, known as chill roll, is presently the source of some unsolved problems.
  • roller In particular, being it idle, it is important that the roller opposes a minimum resistance to the printing support, otherwise the differences in speed between the printing support and the roller may result in the support being warped, being it not perfectly adherent to the roller.
  • a first type of know chill roll comprises a hollow sleeve into which a water jet is injected.
  • the water being poured over the inner surface of the sleeve, carries out the cooling of the outer surface contacting the printing support, by way of thermal conduction.
  • the water jet falls then out of the sleeve due to simple gravity.
  • This type of chill roll presents specific drawbacks. In particular, making it use of an open circuit, i.e. with an open water discharge, the water becomes oxygenated and this causes significant corrosion effects over the metal wall forming the sleeve. Moreover, the oxygen fosters the proliferation of microorganisms such as algae and fungi.
  • a second type of known chill roll provides for, instead of an open water discharge as the one described above, a forced discharge. Therefore, the hydraulic circuit arranged within the roller is of a closed type. This implies that the oxygenation of the water is reduced, thus solving, with this roller, the above explained problems in connection with the corrosion and the formation of algae and other microorganisms.
  • the forced discharge carried out through a pressurized mechanical seal, causes a remarkable increase of the friction force opposing the rotation.
  • This known roll is thus particularly unsatisfactory as far as the occurrence of friction is concerned, and then the correct interaction between the same roller and the printing support.
  • the document JP H09 109367 A discloses a chill roll according to the preamble of claim 1. It is therefore an object of the present invention to solve the above mentioned problems.
  • a particular object of the present invention is to provide a water-cooled chill roll that solves the problem of friction and that does not need a frequent and demanding maintenance.
  • a chill roll adapted to be mounted in a printing machine such as in particular a rotogravure printing machine, comprises a cylindrical body 1, elongated according to a longitudinal axis X.
  • Two shaft pieces 2 project axially from respective end sections of the body; through the shafts the cylindrical body can be pivotally supported around the axis X by a fixed frame (not shown) of the printing machine.
  • a cooling circuit 3 evolves, for the circulation of a cooling fluid, such as for instance, but this is not limitative, water; the circulation of the fluid in the cooling circuit causes a cooling of the roll, and in particular of an outer surface 10 thereof, which is adapted, when the roll is mounted in the printing machine, to be contacted by a printing support.
  • the cooling circuit develops not only in the cylindrical body 1, but also in a first piece 20 of the two shaft pieces 2.
  • An inlet 30 to the cooling circuit is arranged on the first shaft piece 20, as clarified hereafter.
  • This inlet 30 opens in a first chamber 40, defined by a hydraulic seal element 4 that rotatably engages, in the fashion of a cap, on the first shaft piece 20.
  • An access 41 for the inlet of the cooling fluid from the outside the chamber 40 also opens in the chamber 40.
  • the seal element 4 further comprises a second chamber 42, hydraulically separated from the first chamber 40. This second chamber 42 is communicated with a drain passage 420 for draining outside the cooling fluid coming from the circuit.
  • the first shaft piece 20 supports auxiliary rotation drive means 5 arranged so as to be housed in the first chamber 40 and to be hit by the flow of cooling fluid entering the chamber to be supplied to the cooling circuit; as a result, the auxiliary drive means 5 impart a rotational drive around the longitudinal axis X to the relevant shaft piece and consequently to the cylindrical body.
  • the auxiliary drive means 5 comprise a turbine, and namely a polar array of fixed blades 50 around the end of the first shaft piece 20.
  • the inlet access 41 is arranged tangentially, taking as a reference the outer circumference defined by the outmost portions of the blades, so that the entering flow hits the effective surface of the blades, propelling the rotation of the turbine, and as a consequence of the shaft, around the X axis.
  • first shaft piece 20 comprises two sleeves coaxially arranged one inside the other (with a fixed relationship, i.e. with no relative motion), and namely an outer sleeve 200 and an inner sleeve 201.
  • the inner sleeve 201 axially projects with an end portion 201a from the outer sleeve, and it is on this end portion 201a that the auxiliary rotation drive means 5 are arranged.
  • the hydraulic seal element 4 is coupled in the fashion of a cap around the end 201a and engages over the outer periphery of the outer sleeve 200.
  • the hydraulic seal element is mounted in a fixed relationship with the frame of the printing machine, that is to say with no relative motion with respect to it.
  • the outer sleeve 200 and the inside of the seal element 4 are mutually connected in a pivotal arrangement around the X axis, via a bearing arrangement. Therefore, the outer sleeve and thus the shaft piece (and consequently the cylindrical body) are free to rotate with respect to the hydraulic seal element 4.
  • the two sleeves include part of the cooling circuit, in that they define intake and discharge segments of the same circuit.
  • the inner sleeve 201 forms an inner duct 210, extending along the X axis, which represents a first intake segment 3a of the circuit 3.
  • the spout of the intake segment 3a at the end 201a of the first shaft, i.e. the end where the drive means 5 are mounted, is the inlet 30 to the cooling circuit.
  • An annulus gap 201 between the inner sleeve 201 and the outer sleeve 200 extends in turn along the X axis and defines a final, discharge segment 3b of the cooling circuit.
  • the open end 211a of the annulus gap 211 is the outlet of the cooling circuit and opens in the second chamber 42, so that the flow coming from the circuit is collected in the second chamber 42 and discharged from it through the drain passage 420.
  • the cylindrical body 1 in the preferred embodiment shown in the figures, comprises a tubular drum 11 the ends of which are shut by end plugs 12, to which the shaft pieces are fixed.
  • the cooling circuit develops throughout both the end plugs and the thickness of the tubular drum 11.
  • a plurality of channels 110 are formed, extending along the X axis and consecutively arranged throughout the circumference of the drum, as visible in figure 4 .
  • the overall average temperature over the drum, and in in particular over its outer surface remains substantially constant, or at least prevents the rise of excessive thermal gradients.
  • the chill roll according to the invention operates as follows.
  • the seal element 4 is fixed to the frame of the machine.
  • the cylindrical body rotates with respect to the fixed frame.
  • the idle cylindrical body is set into rotation.
  • the water flow injected into the first chamber 40 hits the turbine 5 imparting a rotation thereto, around the X axis; as a result, an auxiliary torque is supplied to the same body, opposing the frictional resistance due e.g. and in particular to the contact between the outer face of the roll and the printing support.
  • the cooling fluid flows then from the first chamber 40 to the first intake segment 3a and from it to the drum through the flow supply channels 110'. After running along the drum for all its elongation, the fluid enters the return channels 110" and then the final discharge segment 3b, to be discharged thorough the second chamber 42 and eventually the drain passage 420.
  • this internal construction accomplishes an optimum distribution of the cooling action over the whole width of the printing support.
  • the amount of fluid fed to the roll, and the pressure thereof, are such as to generate a torque that is sufficient to win the friction almost totally, so that the roll is rotated by the drawing power of the printing support with a negligible opposing force.
  • the fluid can be water; being the circuit inside the roll actually a close one, the water does not become oxygenated, thus avoiding corrosion phenomena and formations of algae or other microorganisms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Glass Compositions (AREA)
EP17724265.8A 2016-05-20 2017-05-15 A chill roll for a printing machine Active EP3458266B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITUA2016A003637A ITUA20163637A1 (it) 2016-05-20 2016-05-20 Cilindro raffreddato
PCT/EP2017/025128 WO2017198344A1 (en) 2016-05-20 2017-05-15 A chill roll for a printing machine

Publications (2)

Publication Number Publication Date
EP3458266A1 EP3458266A1 (en) 2019-03-27
EP3458266B1 true EP3458266B1 (en) 2020-03-11

Family

ID=56990760

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17724265.8A Active EP3458266B1 (en) 2016-05-20 2017-05-15 A chill roll for a printing machine

Country Status (5)

Country Link
EP (1) EP3458266B1 (zh)
CN (1) CN109153253B (zh)
ES (1) ES2784729T3 (zh)
IT (1) ITUA20163637A1 (zh)
WO (1) WO2017198344A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2023575B1 (en) * 2019-07-26 2021-02-18 Xeikon Mfg Nv Printing apparatus with improved cooling
CN113306287A (zh) * 2021-06-07 2021-08-27 大连奥特马工业有限公司 一种冷水辊预驱动装置
CN114434959A (zh) * 2022-01-21 2022-05-06 安徽勇跃包装材料有限公司 一种胶带印刷机的烘干装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4852642A (en) * 1987-11-06 1989-08-01 Lee Yong N Heat exchange device
JPH09109367A (ja) * 1995-10-17 1997-04-28 Toshiba Mach Co Ltd 印刷装置のウエブ冷却ローラ
JP2006347702A (ja) * 2005-06-16 2006-12-28 Komori Corp シート状物案内装置
CN101412312B (zh) * 2008-11-20 2010-12-01 无锡宝南机器制造有限公司 商务印刷机串墨辊的冷却装置
CN201325209Y (zh) * 2008-11-20 2009-10-14 无锡宝南机器制造有限公司 商务印刷机的四滚筒冷却结构
US8606138B2 (en) * 2009-08-05 2013-12-10 Ricoh Company, Limited Cooling device having a turbulence generating unit
CN201849047U (zh) * 2010-10-28 2011-06-01 陕西北人印刷机械有限责任公司 一种凹版印刷机冷却辊装置
CN202098085U (zh) * 2011-05-09 2012-01-04 广东汕樟轻工机械有限公司 一种冷却辊机构
CN203711486U (zh) * 2013-12-13 2014-07-16 天津津重重工机器设备制造有限公司 一种层流冷却辊
CN204095282U (zh) * 2014-09-30 2015-01-14 北京印刷学院 冷却辊
CN204641070U (zh) * 2014-12-18 2015-09-16 陕西北人印刷机械有限责任公司 一种冷却辊

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2784729T3 (es) 2020-09-30
CN109153253A (zh) 2019-01-04
WO2017198344A1 (en) 2017-11-23
EP3458266A1 (en) 2019-03-27
ITUA20163637A1 (it) 2017-11-20
CN109153253B (zh) 2020-07-28

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