EP0224409A1 - Einrichtung zum Dämpfen der mechanischen Schwingungen sich drehender Zylinder mit Kanälen, insbesondere Gummi- und Plattenzylinder von Offsetrotationsdruckmaschinen - Google Patents

Einrichtung zum Dämpfen der mechanischen Schwingungen sich drehender Zylinder mit Kanälen, insbesondere Gummi- und Plattenzylinder von Offsetrotationsdruckmaschinen Download PDF

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Publication number
EP0224409A1
EP0224409A1 EP86402401A EP86402401A EP0224409A1 EP 0224409 A1 EP0224409 A1 EP 0224409A1 EP 86402401 A EP86402401 A EP 86402401A EP 86402401 A EP86402401 A EP 86402401A EP 0224409 A1 EP0224409 A1 EP 0224409A1
Authority
EP
European Patent Office
Prior art keywords
damping
damping device
layers
cylinder
materials
Prior art date
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Granted
Application number
EP86402401A
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English (en)
French (fr)
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EP0224409B1 (de
Inventor
Gérard Résidence "La Louvièrè" Rich
Bertrand Felly
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.)
MacDermid Graphics Solutions Europe SAS
Original Assignee
Rollin SA
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Publication date
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Publication of EP0224409A1 publication Critical patent/EP0224409A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/085—Cylinders with means for preventing or damping vibrations or shocks

Definitions

  • the present invention essentially relates to a device for damping the mechanical vibrations of throat-rotating cylinders, and in particular of the plate and blanket cylinders of rotary offset machines.
  • the present invention therefore aims to solve a new technical problem consisting in the supply of a solution making it possible to dampen the mechanical vibrations of throat-turning cylinders, in particular of plate and blanket cylinders of offset machines, flexography machines. and other machines, such as letterpress printing machines.
  • this technical problem must be solved by a particularly simple design solution, limiting manufacturing costs, while improving print quality and allowing it to increase the speed of rotation of the cylinders and therefore productivity.
  • the present invention provides a device for damping the mechanical vibrations of throat rotating cylinders, in particular of plate and blanket cylinders of offset machines, flexography machines and other machines, such as letterpress printing machines, said groove comprising a leading edge and a trailing edge, characterized in that it comprises one or more means for damping mechanical vibrations, arranged and fixed in one or more suitable housings provided at the periphery of the cylinder in at least an area where it is desired to dampen said vibrations.
  • at least one of these zones is formed by the leading edge and / or the trailing edge of said groove.
  • the abovementioned damping means consists of an insert in the form of a lamellar or laminated part formed by the stack of layers of suitable materials adhered together.
  • certain layers are made at least partially from flexible materials in compression, and certain other layers or the remaining layers are made at least partially from rigid materials in compression.
  • the layers of flexible materials and the layers of rigid materials are alternated over at least certain zones which are intended to constitute damping zones.
  • a plurality of discrete housings spaced axially and / or circumferentially between them on the aforementioned edge of the groove.
  • the aforementioned housings occupy a predetermined arc whose angle at the center is of the order of 5 to 20 °, preferably of the order of 10 to 15 °.
  • one or more associated housing and inserts are also provided in other sectors of the cylinder, in particular in a sector which will be in abutment against a counter-cylinder when the aforementioned groove comes into contact with another cylinder. associated.
  • one or more housings are provided over the entire surface of the cylinder.
  • the dimension of the above-mentioned housings can vary axially and / or circumferentially to determine a variable profile of compressive stiffness.
  • the thickness of the layers of flexible materials can be variable axially and / or circumferentially to further determine a variable profile of compressive stiffness.
  • the aforementioned inserts comprise orifices passing through the adhered layers so as to determine a variable profile of compressive stiffness.
  • These orifices can be of different dimensions and be produced according to an appropriate distribution.
  • the orifice layer can be replaced by an alveolar or cellular layer.
  • the housings extend over all or part of the length of the cylinder and occupy a limited sector defining an angle at the center of the order of 5 to 20 °, preferably of the order of 10 to 15 °.
  • Compression preload can also be applied to the laminate insert to increase dynamic performance.
  • the different layers of flexible deformable materials can be made of different materials with elastic modules varying from 0.1 MPa to 10,000 MPa and chosen from the whole range of elastomeric materials (crosslinked or vulcanized, thermoplastic or thermostable), or thermosetting polymeric, thermoplastic or thermostable and combinations thereof.
  • the nature of the aforementioned flexible material may be variable axially and / or circumferentially to determine a variable profile of compressive stiffness.
  • the rigid material of the inserts may consist of a metal or a structural composite or a fibrous reinforcement such as fabrics, mats or combinations of these materials.
  • the compressive rigidity can be adjusted by varying the modulus of the flexible material, again by varying the modulus of the flexible material, again by varying the thickness of the layers of flexible materials or else by varying the dimension of the housing and therefore the insert, or even by the presence of orifices passing through at least certain adhered layers of the inserts, or finally the nature of the aforementioned flexible material can be axially and / or circumferentially variable to determine a profile of stiffness in compression.
  • the mechanical impulse has a frequency content such that the first mode of bending of these is excited with an amplification close to the theoretical maximum, which has been verified by test or by dynamic calculation transient.
  • the device according to the invention carrying out the damping of mechanical vibrations results in minimizing or even eliminating printing defects which makes it possible to increase the speed of rotation and therefore to obtain a gain in productivity.
  • An offset machine comprises printing blocks made up of a set of cylinders (1, 2) and rollers 6.
  • Offset printing is based on the balance between two opposing fluid films: water and ink with a thickness of 1 to 3 microns. It consists in transferring, via a blanket 7 fixed to the cylinder 2, an image taken from a plate 8, in hollow or in relief, fixed on its respective support cylinder 1.
  • the fixing of the plate 8 and the blanket 7 to the cylinder is obtained by means of fixing devices embedded in the cylinders (not shown) by introducing them into a groove 3, 4 provided respectively in each cylinder 1, 2 in line with these devices.
  • the transfer is obtained by bringing the different cylinders and rollers into contact with a specific regulated pressure.
  • each groove 3, 4 constitutes an annoying discontinuity because it generates mechanical vibrations and irregularities but it is necessary for the assembly and disassembly of the plates (8) and blankets (7).
  • a vibration damping device according to the invention, characterized in that it comprises one or more damping means 10, 12, arranged in one or more respective housings 18, 20, suitable provided at the leading edge 26 and / or the trailing edge 28 of said groove 4.
  • the aforementioned damping means 10, 12 consists of an insert in the form of a lamellar or laminated part formed by the stack layers of suitable materials, bonded to each other as can easily be seen from the consideration of Figure 2.
  • certain layers 30, 32, 34 are made at least partially of flexible materials in compression while certain other layers or the remaining layers 31, 33, 35, 37 are made at least partially of rigid materials in compression.
  • a zone 30a, 32a, 34a of each layer 30, 32, 34 can be made of rigid material in compression to constitute a transition zone as well as a device facilitating fixing to the cylinder.
  • provision may be made for partial or complete alternation between the layers of flexible materials and the layers of rigid materials.
  • the outer layer 37 intended to be rectified to the exact dimensions of the cylinder is a layer made of rigid material in compression usually a metal or alloy.
  • these housings can also be provided in certain sectors of the cylinder. In particular, it is possible to provide housings over the entire surface of the cylinder.
  • the dimension of the housings and therefore of the inserts can vary axially and / or circumferentially to determine a profile compression stiffness variable.
  • FIG. 3 shows an example of drilling the laminated layers.
  • the diameter dimension of the orifices 14, 16, 22 is variable and clearly visible, this variation being possible axially and circumferentially, as shown in FIG. 3.
  • the shape of the orifices can be arbitrary but it is preferred for questions of simple geometry and manufacturing costs, that the orifices 14, 16, 22 have a cylindrical shape with circular section.
  • different layers of flexible materials deformable in compression 30, 32, 34 can be made of different materials with elastic modules varying from 0.1 MPa to 10,000 MPa and chosen from the whole range of elastomeric materials (crosslinked or vulcanized, thermoplastic or thermostable) or thermosetting polymer, thermoplastic or thermostable, and combinations thereof, having adequate modulus and damping in the range of temperatures and frequency of use on machines.
  • the layers of flexible materials can be made with elastomers or polymers of different module and damping capacity while the flexible material itself can be a combination of an arbitrary number of different elastomeric and polymeric materials, this is particularly useful in the circumferential direction.
  • the flexible material can be cellular or alveolar.
  • the rigid material of the layers of rigid material 31, 33, 35, 37 may consist of a metal or an alloy, or a structural composite or a fibrous reinforcement such as fabric, mat or combinations of these materials. .
  • these different layers are bonded together so as to constitute a single laminated insert.
  • the absolute value and the evolution in the axial and / or circumferential direction of the modulus of compression stiffness are adjusted on demand by the presence of the orifices in the insert such as the orifices 14, 16, 22, which can be seen clearly in FIG. 2, which can be at least partly through, with the exception of the outer layer, as shown.
  • inserts are rigidly fixed to the cylinder, in their respective housings by any suitable means, for example by gluing and / or by means of countersunk screws 46 passing through suitable orifices 48 passing through, and ending in blind holes 50 provided in the cylinder.
  • FIG 4 there is shown the shape of the pulse caused by the passage of grooves in the conventional case (A) and in the case of the device according to the invention (B) on a blanket cylinder (2).
  • the device according to the invention also makes it possible to obtain a graduated variation of the rigidity in the circumferential direction which makes it possible to modify the shape of the pulse at will and consequently to improve the vibratory response at will. This results in a significant improvement in depreciation.
  • FIG. 5 precisely shows the vibrational response obtained by transient dynamic calculation step by step, in the conventional case (curve A) leading to printing defects and in the case of the use of the damping device according to the invention (curve B) for a blanket cylinder (2) of an offset machine.
  • curve A the conventional case
  • curve B the damping device according to the invention
  • the shape of the curve is quite conclusive.
  • the present invention therefore provides all the technical advantages mentioned above. It can also be observed that the modular solution proposed according to the invention allows the use of standardized parts.
  • the geometry is simple and lowers manufacturing costs.
  • the mechanical strength is satisfactory and the fatigue strength is excellent. An improved impression will be obtained practically without defects.
  • the pressure variation in the nip between the cylinders, generated by mechanical vibrations, is partially supported by the elastic damping device according to the invention, which is very favorable to the regularity of the printing.
  • a compression preload can be applied to the laminated insert, to increase the dynamic performances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Vibration Prevention Devices (AREA)
  • Rolls And Other Rotary Bodies (AREA)
EP86402401A 1985-10-28 1986-10-27 Einrichtung zum Dämpfen der mechanischen Schwingungen sich drehender Zylinder mit Kanälen, insbesondere Gummi- und Plattenzylinder von Offsetrotationsdruckmaschinen Expired - Lifetime EP0224409B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8515995A FR2589102A1 (fr) 1985-10-28 1985-10-28 Dispositif d'amortissement des vibrations mecaniques des cylindres tournants a gorge, et notamment des cylindres plaque et blanchet des machines offset rotatives
FR8515995 1985-10-28

Publications (2)

Publication Number Publication Date
EP0224409A1 true EP0224409A1 (de) 1987-06-03
EP0224409B1 EP0224409B1 (de) 1990-05-02

Family

ID=9324275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402401A Expired - Lifetime EP0224409B1 (de) 1985-10-28 1986-10-27 Einrichtung zum Dämpfen der mechanischen Schwingungen sich drehender Zylinder mit Kanälen, insbesondere Gummi- und Plattenzylinder von Offsetrotationsdruckmaschinen

Country Status (8)

Country Link
US (1) US4895072A (de)
EP (1) EP0224409B1 (de)
JP (1) JPS62165044A (de)
AU (1) AU579030B2 (de)
BR (1) BR8605227A (de)
CA (1) CA1286537C (de)
DE (1) DE3670791D1 (de)
FR (1) FR2589102A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435027A2 (de) * 1989-12-18 1991-07-03 Rockwell International Corporation Offsetzylinder für eine Druckmaschine und Verfahren zu seiner Herstellung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740475A1 (de) * 1997-09-15 1999-03-18 Roland Man Druckmasch Druckende Zylinder in einer Rollenrotationsdruckmaschine mit zueinander versetzten Spannkanälen
FR2788720B1 (fr) 1999-01-26 2001-04-06 Rollin Sa Blanchet pour un cylindre a gorge etroite d'une machine a imprimer
DE19963945C1 (de) * 1999-12-31 2001-07-19 Koenig & Bauer Ag Verfahren und Anordnung zur Kompensation von Schwingungen rotierender Bauteile
DE10237205B4 (de) * 2002-04-18 2009-02-12 Koenig & Bauer Aktiengesellschaft Aufzug auf einer Walze, Anordnungen der Walze zu einer zweiten Walze sowie Druckwerke einer Druckmaschine mit der Walze
US7171900B2 (en) * 2003-06-09 2007-02-06 Goss International Corporation Variable format offset printing machine
US7817843B2 (en) * 2004-03-04 2010-10-19 The Boeing Company Manufacturing process or in service defects acoustic imaging using sensor array
US20070203433A1 (en) * 2006-02-27 2007-08-30 Murphy Martin P Relaxation inducing apparatus
DE102007009810A1 (de) * 2007-02-28 2008-09-04 Man Roland Druckmaschinen Ag Übertragungsform für einen Übertragungszylinder einer Druckmaschine
JP2010227958A (ja) * 2009-03-26 2010-10-14 Kurosaki Harima Corp 連続鋳造用ノズル
DK177831B1 (da) * 2013-02-18 2014-09-01 Tresu As Anti bouncing trykvalse/sleeve

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR806357A (fr) * 1936-05-13 1936-12-15 Perfectionnements aux blocs amortisseurs de chocs et de vibrations
US2447991A (en) * 1946-06-13 1948-08-24 Hoe & Co R Resilient bearer for offset presses
FR1281685A (fr) * 1961-02-22 1962-01-12 Caoutchouc Et Plastiques Isolateur anti-vibrations
FR1461067A (fr) * 1965-04-19 1966-12-10 Lowell Ind Dispositif d'absorption des vibrations
FR1561224A (de) * 1967-12-29 1969-03-28
US3453955A (en) * 1965-10-20 1969-07-08 Harris Intertype Corp Shock absorber with movement limiting stop for rotary printing press cylinders
FR2407847A1 (fr) * 1977-11-07 1979-06-01 Sambre & Meuse Usines Amortisseur de choc et traction precontraint a etrier monobloc, notamment pour attelages automatiques
DE2945280B1 (de) * 1979-11-09 1980-10-02 Roland Man Druckmasch Zylinder fuer Rotationsdruckmaschinen
FR2467323A1 (fr) * 1979-10-11 1981-04-17 Wright Barry Corp Palier cylindrique en elastomere
DE3012060A1 (de) * 1980-03-28 1981-10-08 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Schwingungsunempfindlicher zylinder fuer druckmaschinen
FR2548134A1 (fr) * 1983-06-29 1985-01-04 Hutchinson Dispositif de butee du type lamifie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795568A (en) * 1972-02-24 1974-03-05 Dayco Corp Compressible printing blanket and method of manufacture
US4452143A (en) * 1980-07-25 1984-06-05 W. R. Grace & Co. Offset printing blanket

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR806357A (fr) * 1936-05-13 1936-12-15 Perfectionnements aux blocs amortisseurs de chocs et de vibrations
US2447991A (en) * 1946-06-13 1948-08-24 Hoe & Co R Resilient bearer for offset presses
FR1281685A (fr) * 1961-02-22 1962-01-12 Caoutchouc Et Plastiques Isolateur anti-vibrations
FR1461067A (fr) * 1965-04-19 1966-12-10 Lowell Ind Dispositif d'absorption des vibrations
US3453955A (en) * 1965-10-20 1969-07-08 Harris Intertype Corp Shock absorber with movement limiting stop for rotary printing press cylinders
FR1561224A (de) * 1967-12-29 1969-03-28
FR2407847A1 (fr) * 1977-11-07 1979-06-01 Sambre & Meuse Usines Amortisseur de choc et traction precontraint a etrier monobloc, notamment pour attelages automatiques
FR2467323A1 (fr) * 1979-10-11 1981-04-17 Wright Barry Corp Palier cylindrique en elastomere
DE2945280B1 (de) * 1979-11-09 1980-10-02 Roland Man Druckmasch Zylinder fuer Rotationsdruckmaschinen
DE3012060A1 (de) * 1980-03-28 1981-10-08 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Schwingungsunempfindlicher zylinder fuer druckmaschinen
FR2548134A1 (fr) * 1983-06-29 1985-01-04 Hutchinson Dispositif de butee du type lamifie

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435027A2 (de) * 1989-12-18 1991-07-03 Rockwell International Corporation Offsetzylinder für eine Druckmaschine und Verfahren zu seiner Herstellung
EP0435027A3 (en) * 1989-12-18 1992-03-25 Rockwell International Corporation Printing press blanket cylinder assembly and method of making same

Also Published As

Publication number Publication date
DE3670791D1 (de) 1990-06-07
CA1286537C (en) 1991-07-23
AU6420086A (en) 1987-04-30
EP0224409B1 (de) 1990-05-02
FR2589102A1 (fr) 1987-04-30
JPS62165044A (ja) 1987-07-21
AU579030B2 (en) 1988-11-10
US4895072A (en) 1990-01-23
BR8605227A (pt) 1987-07-28

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