EP0194618A2 - Cylindre porte-blanchet pour rotatives offset à bobines - Google Patents

Cylindre porte-blanchet pour rotatives offset à bobines Download PDF

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Publication number
EP0194618A2
EP0194618A2 EP86103096A EP86103096A EP0194618A2 EP 0194618 A2 EP0194618 A2 EP 0194618A2 EP 86103096 A EP86103096 A EP 86103096A EP 86103096 A EP86103096 A EP 86103096A EP 0194618 A2 EP0194618 A2 EP 0194618A2
Authority
EP
European Patent Office
Prior art keywords
blanket
channel
blanket cylinder
tensioning
cylinders
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
EP86103096A
Other languages
German (de)
English (en)
Other versions
EP0194618A3 (en
EP0194618B1 (fr
Inventor
Albert Engl
Herbert Stöckl
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.)
Manroland AG
Original Assignee
MAN Roland 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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0194618A2 publication Critical patent/EP0194618A2/fr
Publication of EP0194618A3 publication Critical patent/EP0194618A3/de
Application granted granted Critical
Publication of EP0194618B1 publication Critical patent/EP0194618B1/fr
Expired legal-status Critical Current

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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
    • B41F13/18—Impression cylinders

Definitions

  • the invention relates to a blanket cylinder for web-fed rotary offset printing presses with a narrow tensioning channel extending in the axial direction, the inlet and / or outlet area of which has a jacket contour that deviates from the circular shape.
  • the blanket cylinders then oscillate within this circumferential angle range about their equilibrium position, which they take without contact with the blanket.
  • the blanket forces are suddenly rebuilt after a certain time, if after Rolling over the tension channels hit the neighboring cylinders again. This is the so-called "intervention push".
  • the point in time at which this engagement shock takes place is of great importance. This results in the greatest bending dynamics when the engagement shock occurs exactly in the lower point of reversal of the cylinder vibrations.
  • X channel width
  • the object of the invention is to reduce the bending dynamics of the blanket cylinders when the tensioning channels roll over, in order to avoid the print strips caused by cylinder vibrations on the printed products, or at least to significantly reduce their intensity.
  • Fig. 1 shows schematically the pit areas of two known blanket cylinders 1, 2, which, as already mentioned, so far have flats 5 and 6 on both sides of the tensioning channels 3, 4 on one side and 7 and 8 on the other side.
  • the inlet and outlet areas 5 to 8 are flattened on the tensioning channels 3, 4, the rubber blanket contact between the two gum blanket cylinders 1 and 2 is interrupted.
  • the blanket line force approaches 0 before reaching the pits and remains at 0 for a relatively long period of time.
  • the mean blanket line force is the force which is present outside the tensioning channels during the rolling of the two blanket cylinders 1 and 2.
  • Fig. 2 shows the inventive design of the areas on both sides of the tension channels 13, 14 of two blanket cylinders 11, 12.
  • a profile increase with a progressive increase based on the circular cylindrical jacket contour provided, as indicated at 15, 16, 17, 18.
  • FIG. 3 schematically shows an enlarged profile elevation 16, 18 on the blanket cylinder 12.
  • the progressive increase in the profile elevations 16, 18 can follow a mathematical function, for example an exponential function, a parabola, a hyperbola or a clothoid. It is essential that the start of the profile elevations 16, 18 is the tangent to the circular arc.
  • the end of the profile elevations 16, 18 is shown quite pointed, in practice, however, a radius of the order of 2/10 to 3/10 mm should be adhered to in order to damage the rubber blanket, which is known to be in the To avoid clamping channels 13, 14 being pinched.
  • the profile elevations 16, 18 are matched to the width of the tensioning channels 13, 14 so that when Rolling over the channels the blanket line contact is maintained.
  • the blanket cylinders 11, 12 cannot collapse over the tensioning channels 13, 14, as a result of which the dynamic vibration behavior was adversely affected.
  • the blanket cylinders 11, 12 are first pushed apart before the tension channels 13, 14 are reached by the profile elevations 17 and 18, that is to say the blanket line force is thereby based on the average blanket line force elevated. Subsequently, the blanket line force does not decrease to 0 over the stretching channel area, as is the case with known devices over a long period of time. If, however, this is not possible at all speeds, the increase in the blanket line force to 0 takes place during the profile increase according to the invention only during a very short period when the cylinder pit 14 is rolled over.
  • FIG. 5 shows that when the cylinder pit 14 is reached with a normal channel profile, the blanket line force becomes 0 and remains at 0 over the entire channel area. This is the thin solid line A.
  • the bold curve shows the curve of the blanket line force in the channel according to the invention with the profile elevation 16 or 18.
  • This curve shows that shortly before reaching the cylinder pit 14 the blanket line force is initially increased and then only goes towards 0 for a short time, which in turn leads to a sharp increase.
  • the rubber blanket force will only change after overcoming the pit after a curve with very low amplitudes. The strong deflections when the pit overflows when raising the profile according to the invention are not disturbing, since no printing takes place during this time.
  • FIG. 6 shows the vibration path of the rubber blanket cylinder 12 when the pit 14 overflows and then during the rubber blanket line forces according to FIG. 5.
  • the thin solid line in turn shows a known tension channel and the thick solid line shows the tension channel 14 according to the invention with profile elevation.
  • Curves a, b clearly show that, in the embodiment according to the invention, the dynamic behavior both when the pit 14 is overrun and after the pit 14 is overrun is considerably more favorable than in the conventional tensioning channels without profile elevation.
  • the vibrations after the cylinder pit 14 overflows during the profile elevation according to the invention are no longer disruptive, that is to say they no longer make themselves felt as printed strips on the printed copies.
  • FIGS. 7 and 8 represent, similar to FIGS. 5 and 6, the blanket line forces and the oscillation paths of the (B) and the conventional channel design (A) according to the invention in a quasi-static state, which corresponds to a speed of 720 per hour and where the rise is fairly constant.
  • the oscillation paths of the rubber blanket cylinder are shown in FIG. 8.
  • curve A shows for the known channel design
  • the cylinder here moves in one direction, then remains at a certain level and reaches after about 0.2 seconds. the old situation again.
  • curve B the cylinder is first raised, then goes in the other direction, is raised again and already reaches after 12 seconds. his starting point.
  • the total path change in the channel profiling according to the invention is only approx. 50% of the conventional channel design.
  • Fig. 4 shows the profile elevation according to the invention on profile rails 19 and 20, which are attached to the blanket cylinder 12 on both sides of the tensioning channel 14, for example are glued or screwed on.
  • profile rails 19, 20 of this type it is also possible to work the profile elevations directly from the solid cylinder material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP86103096A 1985-03-14 1986-03-07 Cylindre porte-blanchet pour rotatives offset à bobines Expired EP0194618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509046 1985-03-14
DE3509046 1985-03-14

Publications (3)

Publication Number Publication Date
EP0194618A2 true EP0194618A2 (fr) 1986-09-17
EP0194618A3 EP0194618A3 (en) 1987-10-14
EP0194618B1 EP0194618B1 (fr) 1989-05-10

Family

ID=6265118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103096A Expired EP0194618B1 (fr) 1985-03-14 1986-03-07 Cylindre porte-blanchet pour rotatives offset à bobines

Country Status (4)

Country Link
US (1) US4738200A (fr)
EP (1) EP0194618B1 (fr)
JP (1) JPS61213157A (fr)
DE (1) DE3663232D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004016431A1 (fr) * 2002-07-19 2004-02-26 Koenig & Bauer Aktiengesellschaft Procede et dispositif pour reduire les vibrations au niveaux d'elements rotatifs et element rotatif correspondant amorti en vibrations
DE102006027142B3 (de) * 2006-06-12 2007-05-24 Koenig & Bauer Ag Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine
DE102006027144B3 (de) * 2006-06-12 2007-11-29 Koenig & Bauer Aktiengesellschaft Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine
DE102006027143B4 (de) * 2006-06-12 2011-06-01 Koenig & Bauer Aktiengesellschaft Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3350043B2 (ja) * 1990-07-27 2002-11-25 株式会社日立製作所 図形処理装置及び図形処理方法
JP3457932B2 (ja) 2000-07-31 2003-10-20 三菱重工業株式会社 円筒状ブランケット及びブランケット胴並びに印刷機
DE10253997C1 (de) * 2002-07-19 2003-12-11 Koenig & Bauer Ag Verfahren und Vorrichtung zur Verminderung von Schwingungen an rotierenden Bauteilen sowie schwingungsgedämpftes rotierendes Bauteil
EP1631457B1 (fr) * 2003-06-09 2009-04-15 Goss International, Inc. Presse pour impression offset a format variable
JP4021856B2 (ja) * 2004-02-06 2007-12-12 西研グラフィックス株式会社 輪転印刷機の印刷胴構造
US20070203433A1 (en) * 2006-02-27 2007-08-30 Murphy Martin P Relaxation inducing apparatus
JP7100986B2 (ja) * 2018-01-26 2022-07-14 三菱重工機械システム株式会社 ブランケット及びブランケット胴並びに印刷機

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB397164A (en) * 1932-01-19 1933-08-21 Ernest William Haward Improvements in and relating to printing cylinders
US3395638A (en) * 1965-08-13 1968-08-06 Miehle Goss Dexter Inc Impression cylinder construction to prevent streaking in letterpress
US3453956A (en) * 1965-10-20 1969-07-08 Harris Intertype Corp Shock absorber for rotary printing press cylinders
US3453955A (en) * 1965-10-20 1969-07-08 Harris Intertype Corp Shock absorber with movement limiting stop for rotary printing press cylinders
DD101335A1 (fr) * 1972-12-27 1973-11-12
DE2945280C2 (de) * 1979-11-09 1981-06-11 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Zylinder für Rotationsdruckmaschinen
DE3012060C2 (de) * 1980-03-28 1987-02-12 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Schwingungsunempfindlicher Zylinder für Druckmaschinen
DE3364104D1 (en) * 1983-01-18 1986-07-17 De La Rue Giori Sa Flexible sheet attaching device for a printing cylinder of a rotary printing machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004016431A1 (fr) * 2002-07-19 2004-02-26 Koenig & Bauer Aktiengesellschaft Procede et dispositif pour reduire les vibrations au niveaux d'elements rotatifs et element rotatif correspondant amorti en vibrations
US7111555B2 (en) 2002-07-19 2006-09-26 Koenig & Bauer Aktiengesellschaft Method and device for reducing vibrations on rotating parts, and vibration-damped rotating part
DE102006027142B3 (de) * 2006-06-12 2007-05-24 Koenig & Bauer Ag Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine
DE102006027144B3 (de) * 2006-06-12 2007-11-29 Koenig & Bauer Aktiengesellschaft Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine
DE102006027143B4 (de) * 2006-06-12 2011-06-01 Koenig & Bauer Aktiengesellschaft Drucktucheinheit für einen Drucktuchzylinder einer Rotationsdruckmaschine

Also Published As

Publication number Publication date
EP0194618A3 (en) 1987-10-14
DE3663232D1 (en) 1989-06-15
EP0194618B1 (fr) 1989-05-10
JPS61213157A (ja) 1986-09-22
US4738200A (en) 1988-04-19

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