EP0345472A2 - Rouleaux en caoutchouc et procédé pour la modification de la face avant - Google Patents

Rouleaux en caoutchouc et procédé pour la modification de la face avant Download PDF

Info

Publication number
EP0345472A2
EP0345472A2 EP89108283A EP89108283A EP0345472A2 EP 0345472 A2 EP0345472 A2 EP 0345472A2 EP 89108283 A EP89108283 A EP 89108283A EP 89108283 A EP89108283 A EP 89108283A EP 0345472 A2 EP0345472 A2 EP 0345472A2
Authority
EP
European Patent Office
Prior art keywords
rubber
roller
rubber roller
end faces
rollers
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
EP89108283A
Other languages
German (de)
English (en)
Other versions
EP0345472A3 (fr
EP0345472B1 (fr
Inventor
Hans-Jürgen Kusch
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0345472A2 publication Critical patent/EP0345472A2/fr
Publication of EP0345472A3 publication Critical patent/EP0345472A3/fr
Application granted granted Critical
Publication of EP0345472B1 publication Critical patent/EP0345472B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N7/00—Shells for rollers of printing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/26—Damping devices using transfer rollers

Definitions

  • the invention relates to a rubber roller for a pair of rollers, in which the rubber roller is positioned in a contact zone along common surface lines of the rubber roller and a further roller on the further roller and a liquid supply is provided which is located in a gusset located above the contact zone between the rubber roller and the another roller is enclosed by means of sealing means at the ends of these rollers, the sealing means being positioned at least with respect to the rubber roller on one end face of a respective roller, and also a method for converting the shape at the end faces of such a rubber roller.
  • a pair of rollers of the type mentioned is known, for example, from US Pat. No. 4,455,938, specifically as part of a dampening unit for an offset printing machine.
  • the applicator roller which has an elastic surface and corresponds to the rubber roller of the subject matter of the invention, is used for applying dampening solution to a plate cylinder of the offset printing press.
  • a dampening solution supply is enclosed by means of sealing means at the ends of these rollers.
  • sealing means have a sealing plate at each end of the pair of rollers, which is set with a flat side against an end face of the application roller and with an arcuate sealing plate end face against the outer surface of the metering roller, each under the contact pressure of a spring.
  • Sealing plates of the type mentioned are generally made of a plastic with a low coefficient of friction, such as PTFE.
  • Dosing rollers of dampening systems interacting with sealing plates of this type are generally provided at their ends with steel rings, against which a respective circular arc-shaped sealing plate end face is set, so that relatively little wear occurs on the metering roller and on the sealing plate end face, especially when plasma-coated steel rings are used.
  • the object of the invention is to ensure the sealing of a rubber roller on its end faces by means of sealing plates placed against these end faces over an extended period of time and at relatively high speeds of the rubber roller.
  • the elasticity is also decisive for the use of rubber for an application roller of a dampening unit of an offset printing press.
  • the rubber known as the preferred sealing material also gave satisfactory results when sealing an applicator roller designed as a rubber roller.
  • the invention treads the way to maintain the elasticity of the outer surface of the applicator roller and, in return for utilizing the elasticity and the relatively high coefficient of friction, for the purpose of sealing, to form the end faces of a rubber roller to be sealed with reduced elasticity and reduced coefficient of friction.
  • the invention makes use of a state of rubber which is undesirable in the prior art and provides this state of the state on the end faces of the rubber roller.
  • An undesirable state of rubber in the prior art lies between a rubber-elastic and a glass-like state and occurs with advanced molecular crosslinking, which is accompanied by an increasing hardening of the rubber and an increasing smoothing of its surface.
  • the invention makes use of these properties known as signs of aging.
  • an artificially shortened aging process is provided locally on the end faces of the rubber roller and the resulting hardening and smoothing of the end faces is used to improve their wear resistance and to reduce their frictional resistance, while the rubber-elastic ones Properties of the remaining areas of the rubber roller are retained.
  • the artificially shortened aging process is brought about by means of UV radiation. According to the invention, this is further restricted to the end faces of the rubber rollers.
  • the artificially aged end faces of the rubber roller provided according to the invention now ensure, thanks to the increased wear resistance and the smoothed surface, an end face sealing of the rubber roller by means of sealing plates placed against their end faces over a prolonged period and at relatively high speeds of the rubber roller.
  • the shield 11 is provided with openings 12 which are adapted to the respective diameter of the rubber rollers 1, 2, ..., n.
  • the longitudinal axes 20.1, 20.2, ..., 20.n of the rubber rollers 1, 2, ..., n lie in an imaginary second plane 21.
  • the shield 11 protects the outer surfaces of the rubber rollers 1, 2,..., N from the UV radiation emitted by the black light lamp 22.
  • a power of the order of 0.1 watts is installed in the black light tube per square centimeter of an end face of a rubber roller.
  • a device for performing the described method which enables the irradiation of the first end faces 1.1, 2.1, ..., n.1 of the rubber rollers 1, 2, ..., n.
  • a corresponding device can also be provided for the second end faces 1.2 of the rubber rollers 1, 2, ..., n and used at the same time as the one shown, so that an inventive one Conversion of the state shape on both faces of a plurality of rubber rollers can be done simultaneously.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
EP89108283A 1988-06-10 1989-05-09 Rouleaux en caoutchouc et procédé pour la modification de la face avant Expired - Lifetime EP0345472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819802A DE3819802C1 (fr) 1988-06-10 1988-06-10
DE3819802 1988-06-10

Publications (3)

Publication Number Publication Date
EP0345472A2 true EP0345472A2 (fr) 1989-12-13
EP0345472A3 EP0345472A3 (fr) 1991-10-16
EP0345472B1 EP0345472B1 (fr) 1994-07-27

Family

ID=6356289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108283A Expired - Lifetime EP0345472B1 (fr) 1988-06-10 1989-05-09 Rouleaux en caoutchouc et procédé pour la modification de la face avant

Country Status (7)

Country Link
US (1) US5109587A (fr)
EP (1) EP0345472B1 (fr)
JP (1) JPH0242208A (fr)
CN (1) CN1017177B (fr)
AU (1) AU626548B2 (fr)
CA (1) CA1338635C (fr)
DE (2) DE3819802C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5435902A (en) * 1993-10-01 1995-07-25 Andre, Sr.; Larry E. Method of incremental object fabrication
EP0747314B1 (fr) * 1995-06-07 1999-08-25 Eastman Kodak Company Noyau d'enroulement d'une bande de matériau déformable
CN102358051B (zh) * 2011-06-08 2013-10-30 北京莱盛高新技术有限公司 用于胶辊表面处理的连续匀速旋转光照装置
CN103362948B (zh) * 2013-07-24 2015-12-09 杭州友谐科技有限公司 一种机械胶辊装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625735A (en) * 1948-12-07 1953-01-20 Resistoflex Corp End seal for printing rollers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4455938A (en) * 1979-05-22 1984-06-26 Graph Tech Inc. Dampening apparatus for lithographic press
GB8727902D0 (en) * 1987-11-28 1987-12-31 Emi Plc Thorn Method of forming a solid article

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2625735A (en) * 1948-12-07 1953-01-20 Resistoflex Corp End seal for printing rollers

Also Published As

Publication number Publication date
AU3605389A (en) 1989-12-14
EP0345472A3 (fr) 1991-10-16
CN1017177B (zh) 1992-06-24
US5109587A (en) 1992-05-05
JPH041207B2 (fr) 1992-01-10
EP0345472B1 (fr) 1994-07-27
CA1338635C (fr) 1996-10-08
AU626548B2 (en) 1992-08-06
DE3819802C1 (fr) 1989-11-23
JPH0242208A (ja) 1990-02-13
CN1038861A (zh) 1990-01-17
DE58908096D1 (de) 1994-09-01

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