EP0335830B1 - Verfahren und Installation zur Herstellung einer Mehrfachform für die Reproduktion von Stichtiefdruckplatten - Google Patents

Verfahren und Installation zur Herstellung einer Mehrfachform für die Reproduktion von Stichtiefdruckplatten Download PDF

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Publication number
EP0335830B1
EP0335830B1 EP89810144A EP89810144A EP0335830B1 EP 0335830 B1 EP0335830 B1 EP 0335830B1 EP 89810144 A EP89810144 A EP 89810144A EP 89810144 A EP89810144 A EP 89810144A EP 0335830 B1 EP0335830 B1 EP 0335830B1
Authority
EP
European Patent Office
Prior art keywords
plate
electrode
plastic plate
plastic
original
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.)
Expired - Lifetime
Application number
EP89810144A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0335830A3 (en
EP0335830A2 (de
Inventor
Antonio Coluzzi
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.)
KBA Notasys SA
Original Assignee
De la Rue Giori SA
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 De la Rue Giori SA filed Critical De la Rue Giori SA
Priority to AT89810144T priority Critical patent/ATE91964T1/de
Publication of EP0335830A2 publication Critical patent/EP0335830A2/de
Publication of EP0335830A3 publication Critical patent/EP0335830A3/de
Application granted granted Critical
Publication of EP0335830B1 publication Critical patent/EP0335830B1/de
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
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C3/00—Reproduction or duplicating of printing formes
    • B41C3/06—Reproduction or duplicating of printing formes to produce printing blocks from plastics

Definitions

  • the invention relates to a method for producing a multiple mold for the reproduction of intaglio printing plates according to the preamble of claim 1 and to an installation for carrying out the method.
  • a plastic sheet made of thermoplastic material is prepared, the size of which corresponds to that of the original sheet and has a thickness of approximately 0.5 to 0.7 mm; this plastic plate is placed in a press, namely between a flat support, which is provided with a heating device, and the engraved surface of the original plate. The plastic plate is then heated to a temperature of approximately 150 ° C. Then the original plate is stamped with a press of about 100 to 200 kg / cm2 pressed against the plastic plate, which after this operation bears the complementary relief of the image or pattern engraved on the original plate. In this way, a positive mold or patrix consisting of plastic is obtained. After the pressure has been switched off, the original plate is removed and the patrix is cooled, which may be natural cooling or cooling accelerated with suitable coolants.
  • each patrix is meticulously cut in order to obtain a patrix with exactly predetermined dimensions. Then all the male parts are arranged in rows and columns next to each other on a level surface and provisionally glued there. The next step is to insert this assembled and provisionally glued arrangement of all patrices into a plastic welding machine, in which all joints between adjacent patrices are welded, so that a multiple patrix is obtained in the form of a plastic plate that has the desired number of impressions. This multiple patrix must now be carefully polished and treated in such a way that the excess material is removed from the weld seams and a completely smooth and steady surface is obtained between the individual impressions.
  • the manufacturing method described above is complicated and lengthy and requires precision working special machines.
  • the composition of the multiple form from single patrices must be carried out with great care and accuracy, so that the exact register is guaranteed later during the printing process in the intaglio printing machine.
  • the plastic plate is first covered with a silver layer. Then a copper layer is applied to this silver-plated surface by electrolysis. By now removing the plastic plate from the copper layer, one obtains a copper plate in the form of a multiple copper matrix with deepened impressions. The surface of this die between the impressions is processed in such a way that it is completely smooth and continuous. Starting from this multiple Kufpfer matrix, a nickel plate in the form of a multiple nickel matrix and then a nickel plate in the form of a multiple nickel matrix is produced, which forms the actual intaglio printing plate, which is later mounted on the plate cylinder of the printing press.
  • This printing plate is subjected to a finishing process such that on the one hand the surface between the impressions is smooth and steady and on the other hand the back of the printing plate, which is in contact with the Plate cylinder is also completely smooth and steady. In order to increase the resistance of the printing surface to abrasion, this printing plate surface is also given a chrome layer.
  • the invention has for its object to improve the manufacture of a multiple mold of the type described, which serves as the basis for the reproduction of a gravure printing plate, preferably consisting of nickel, and in particular to rationalize and simplify the method of exact positioning of all the prints on the multiple mold, whereby the manufacturing effort is reduced and the quality of the multiple mold is increased.
  • a multiple mold produced can be either a multiple male or a multiple female.
  • the hot pressing of the plastic plate is preferably carried out under negative pressure.
  • the advantages of the invention consist essentially in the fact that the plastic plate forming the multiple mold can be produced directly in successive steps, without it having to be assembled from separately produced molds, each with only one impression, whereby the precise trimming of individual molds, the exact, time-consuming Join these shapes together by welding the parting lines and removing excess welding material is eliminated.
  • the high-frequency heating of the plastic plate allows the reduction of the contact pressure required for hot pressing this plastic plate, especially when working under negative pressure, as a result of which particularly close contact between the original plate and the plastic plate can be achieved in a dust-free environment.
  • the installation has a frame 1 which carries all parts of the device.
  • a first frame 2 designed as a carriage is mounted on the frame 1 so as to be longitudinally displaceable in the horizontal direction in the direction of arrow F2.
  • a second frame, also designed as a slide, in the form of a support frame 3 is slidably mounted in the direction of arrow F3, that is to say perpendicularly to the direction of displacement of the first frame 2.
  • the support frame 3 serves to hold a plastic plate 4, which is held with the aid of fastening elements 3a and from which the later multiple shape is formed with a large number of identical impressions.
  • a support 5 shown in FIG. 2 is fixedly attached to the frame 1 below the displacement plane.
  • an insulating plate 6 which, as shown in FIG. 2, carries a plate-shaped electrode 7 which is used for high-frequency heating of the plastic plate 4.
  • a cooling device 8 is arranged between the electrode 7 and the insulating plate 6, in which a cooling liquid can preferably circulate and for this purpose is provided with two lines 8a and 8b for the entry and exit of this liquid.
  • a plate holding device which has an upper fastening plate 9 which is firmly connected to the frame 1, for example with the aid of four inclined supports 10.
  • a double-acting cylinder 11 is installed on this fastening plate 9, the piston rod 12 of which Fastening plate 9 passes through and carries at its lower end a horizontal plate 13 which is provided with a guide device in the form of two guide rods 14 and 15 which run parallel to the piston rod 12 of the cylinder 11 and also cross the upper fastening plate 9.
  • the actual plate holder 18 is suspended from this horizontal plate 13 with the aid of fastening elements 16 in the form of four threaded bolts 17 provided with nuts 17, which plate holder bears on its underside the original plate 19 with the engraved image or pattern to be reproduced and its distance from the horizontal plate 13 Help of the fasteners 16 can be adjusted.
  • the plate holder 18 is preferably provided with a device for heating and cooling by means of a hot or cold liquid circulating inside it provided that can enter through one of the two lines 18a and 18b as needed and can exit through the other line.
  • a chamber 20 is provided below the plate holder 18, in which a negative pressure can be generated.
  • This chamber 20 is formed by a bellows, the upper end of which is attached to the edge of the plate holder 18 and the lower end of which is in close contact with the plastic plate 4.
  • a high-frequency device 22 to which the electrode 7 is connected, and the various operating elements are arranged, which, for example, shift the frames 2 and 3 designed as slides, actuate the cylinder 11 with its piston and switch on and off allow the radio frequency device 11.
  • the installation described is of course only one exemplary embodiment and allows numerous structural variants, in particular, for example, with regard to the relative displaceability between plastic plate 4 on the one hand and electrode 7 and original plate 19 on the other.
  • the arrangement can also be such that the entire plate holding device together with the cylinder 11 and the original plate 19 and the electrode 7 in one of the horizontal directions F2 or F3 and the plastic plate 4 can then only be moved in the other direction F3 or F2, or that the entire plate holding device with the cylinder 11 and the original plate 19 and the electrode 7 can be moved in both directions while the plastic plate 4 is fixed on the frame 1 .
  • a layer 24 (FIG. 3) lying on the electrode, preferably made of glass fibers, can be provided between the electrode 7 and the plastic plate 4 in order to ensure that this electrode 7 fits well during the pressing.
  • an original plate 19 made of metal, which has the image or pattern to be reproduced in the form of engraved lines and possibly punctiform areas of different depth, but can also consist of an original relief plate, which has the pattern or image to be reproduced in the form of corresponding increases.
  • This original plate 19 is attached to the underside of the plate holder 18.
  • a plastic plate 4 is prepared from a material that can be deformed by hot pressing and has practically the same dimensions as the intaglio printing plate to be produced.
  • This plastic plate 4 can in particular consist of a PVC known under the trade name Cobex.
  • This plastic plate 4 is, when the plate holder 18 is raised, arranged in the support frame 3 designed as a slide and held by adjustable fastening members 3a in the form of small pliers which uniformly clamp the plastic plate 4 within the frame 3. With the help of the two displaceable frames 2 and 3, the plastic plate 4 is guided into a first adjusted position, in which the plate area which is to receive the first impression 23 lies exactly below the raised original plate 19 above the electrode 7, which is approximately the same same dimensions as the original plate 19.
  • the plate holder 18 is first lowered using the piston of the cylinder 11 such that the lower end of the bellows forming the chamber 20 rests on the plastic plate 4.
  • a vacuum of approximately 80% is then generated within the chamber 20, and the engraved original plate 19 is then lowered onto the plastic plate 4.
  • a pressure in the order of magnitude of, for example, 20 kg / cm 2 is exerted on the plastic plate lying against the electrode 7 with the aid of the cylinder 11, which is a pressure which is 5 to 10 times lower than in previously known methods .
  • high-frequency voltage is applied to the electrode 7 in order to heat the plastic plate 4 by high-frequency. Then the supply of the electrode 7 is switched off and the plastic plate 4 is cooled for 3 to 4 minutes by passing a cooling liquid through the device 8; likewise, the original plate 19 is cooled by passing a cooling liquid through the plate holder 18.
  • the original plate 19 is removed from the plastic plate 4 by lifting.
  • the plastic plate 4 is then shifted to the second adjusted position corresponding to the second impression to be made, either in the direction of F2 or in the direction of F3, and then the sequence of the operations described above is carried out again to produce the second impression.
  • This sequence of steps is successively continued until the plastic plate 4 has been provided with as many prints arranged in rows and columns as is desired, that is to say until the number and arrangement of the prints correspond to those of the intaglio printing plate to be produced.
  • a multiple shape in the form of a plastic plate 4 with a corresponding number of impressions is thus obtained in a simple manner. Since an engraved original plate was assumed in the example under consideration, this multiple form represents a multiple patrix with raised impressions. On the other hand, if one starts from an original plate with raised reliefs, then a multiple matrix in the form of a plastic plate is obtained using the same method described above whose impressions consist of depressions.
  • the original plate 19 Before the original plate 19 is brought into contact with the plastic plate 4, it may be expedient to preheat either only the plastic plate 4 with the aid of high-frequency heating or both this plastic plate 4 and the original plate 19, with hot water in the last case for a few minutes the inside of the plate holder 18 is passed before the original plate 19 is lowered onto the plastic plate 4.
  • This preheating makes it possible to improve the quality of the impression, because it avoids problems associated with the different dimensions of the parts in contact with one another; such expansions can possibly affect the quality of the impression.
  • the installation can also be such that the plate holding device is fixed and the electrodes 7 are raised with their support in order to press the plastic plate 4 against the original plate 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Superconductor Devices And Manufacturing Methods Thereof (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP89810144A 1988-03-28 1989-02-23 Verfahren und Installation zur Herstellung einer Mehrfachform für die Reproduktion von Stichtiefdruckplatten Expired - Lifetime EP0335830B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810144T ATE91964T1 (de) 1988-03-28 1989-02-23 Verfahren und installation zur herstellung einer mehrfachform fuer die reproduktion von stichtiefdruckplatten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1164/88 1988-03-28
CH1164/88A CH675097A5 (enrdf_load_stackoverflow) 1988-03-28 1988-03-28

Publications (3)

Publication Number Publication Date
EP0335830A2 EP0335830A2 (de) 1989-10-04
EP0335830A3 EP0335830A3 (en) 1990-07-18
EP0335830B1 true EP0335830B1 (de) 1993-07-28

Family

ID=4203975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810144A Expired - Lifetime EP0335830B1 (de) 1988-03-28 1989-02-23 Verfahren und Installation zur Herstellung einer Mehrfachform für die Reproduktion von Stichtiefdruckplatten

Country Status (10)

Country Link
US (1) US5051083A (enrdf_load_stackoverflow)
EP (1) EP0335830B1 (enrdf_load_stackoverflow)
JP (1) JPH07110534B2 (enrdf_load_stackoverflow)
AT (1) ATE91964T1 (enrdf_load_stackoverflow)
AU (1) AU612803B2 (enrdf_load_stackoverflow)
CA (1) CA1311592C (enrdf_load_stackoverflow)
CH (1) CH675097A5 (enrdf_load_stackoverflow)
DD (1) DD280294A5 (enrdf_load_stackoverflow)
DE (1) DE58905002D1 (enrdf_load_stackoverflow)
RU (1) RU1769738C (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0429513A4 (en) * 1988-08-18 1991-11-27 Norford Industries Pty. Ltd. Process and apparatus for heat forming of materials
DE69004072T2 (de) * 1990-02-19 1994-04-28 De La Rue Giori Sa Vorrichtung und Verfahren zum Herstellen einer plastischen Mehrfachform für die Nachbildung von Tiefdruckplatten.
AUPN897996A0 (en) * 1996-03-27 1996-04-26 Norford Industries Pty Limited Method for heat forming solid surface veneer
US7482085B2 (en) * 1996-06-07 2009-01-27 Bdf Ip Holdings Ltd. Apparatus for improving the cold starting capability of an electrochemical fuel cell
US5725890A (en) * 1996-09-04 1998-03-10 Cheng; Yu-Feng Mechanism for forming a distal face of a fiber-optics
US7018674B2 (en) * 2001-03-02 2006-03-28 Omron, Corporation Manufacturing methods and apparatuses of an optical device and a reflection plate provided with a resin thin film having a micro-asperity pattern
DE10328198A1 (de) * 2003-06-24 2005-01-20 Bernd Hansen Prägevorrichtung
JPWO2005075184A1 (ja) * 2004-02-04 2007-10-11 住友重機械工業株式会社 加圧成形装置、金型及び加圧成形方法
JP4554330B2 (ja) * 2004-10-21 2010-09-29 株式会社リコー 高耐久性を有する断熱スタンパ構造
JP5176064B2 (ja) * 2009-04-28 2013-04-03 独立行政法人 国立印刷局 多面版作製装置及び多面版作製方法
JP2017045714A (ja) * 2015-08-28 2017-03-02 東洋製罐グループホールディングス株式会社 高周波誘電加熱方法
CN110193972A (zh) * 2019-07-03 2019-09-03 海盐华港印刷有限公司 一种平面立体两用彩卡生产用压纹装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1991009A (en) * 1931-06-24 1935-02-12 Theodore C Browne Printing plate and method for forming the same
US2463289A (en) * 1946-08-30 1949-03-01 Goodrich Co B F Method and apparatus for producing cellular rubber material
US2754606A (en) * 1950-05-04 1956-07-17 Williams John Method of forming moulded printing negatives and positives
US2920172A (en) * 1956-10-04 1960-01-05 Gen Motors Corp Dielectric heating and pressing die structure
US3101668A (en) * 1960-03-14 1963-08-27 Johnson & Son Inc S C Printing members and method of making same
DE1629681A1 (de) * 1965-10-23 1971-01-28 Teldec Telefunken Decca Vorrichtung zum Praegen von Rillen in Schallplatten
US3553071A (en) * 1966-08-19 1971-01-05 Grace W R & Co Novel printing sheet material
US3593376A (en) * 1968-04-04 1971-07-20 Clement Co J W Apparatus for making multiple-image electrotype molds
JPS53105558A (en) * 1977-02-28 1978-09-13 Dainippon Printing Co Ltd Forming of relief pattern
DE2851875C2 (de) * 1978-11-30 1983-11-10 Heinz Wilhelm 8000 München Becker Reproduktionsverfahren für Ölgemälde oder dergleichen
JPS5763213A (en) * 1980-10-03 1982-04-16 Tomotaka Hida Molding of thermoplastic hard resin plate
JPS5952632A (ja) * 1982-09-18 1984-03-27 Showa Kasei:Kk 合成樹脂スタンプ片の製造方法
JPS59194846A (ja) * 1983-04-21 1984-11-05 Japan Steel Works Ltd:The 転写成形装置
JPS62152710A (ja) * 1985-12-27 1987-07-07 Dainippon Printing Co Ltd 凹凸賦型用剥離シ−トの製造方法
JP6016349B2 (ja) 2011-10-31 2016-10-26 キヤノンアネルバ株式会社 基板ホルダー及び真空処理装置

Also Published As

Publication number Publication date
EP0335830A3 (en) 1990-07-18
ATE91964T1 (de) 1993-08-15
AU612803B2 (en) 1991-07-18
EP0335830A2 (de) 1989-10-04
RU1769738C (en) 1992-10-15
AU3161189A (en) 1989-09-28
DE58905002D1 (de) 1993-09-02
CH675097A5 (enrdf_load_stackoverflow) 1990-08-31
DD280294A5 (de) 1990-07-04
JPH01297246A (ja) 1989-11-30
JPH07110534B2 (ja) 1995-11-29
US5051083A (en) 1991-09-24
CA1311592C (en) 1992-12-22

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