EP0537649A1 - Machine d'impression à tampon avec dispositif d'encrage fermé - Google Patents

Machine d'impression à tampon avec dispositif d'encrage fermé Download PDF

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Publication number
EP0537649A1
EP0537649A1 EP92117348A EP92117348A EP0537649A1 EP 0537649 A1 EP0537649 A1 EP 0537649A1 EP 92117348 A EP92117348 A EP 92117348A EP 92117348 A EP92117348 A EP 92117348A EP 0537649 A1 EP0537649 A1 EP 0537649A1
Authority
EP
European Patent Office
Prior art keywords
cliché
pad
printing
ink
machine according
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.)
Withdrawn
Application number
EP92117348A
Other languages
German (de)
English (en)
Inventor
Karl Bahnmüller
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.)
Madag Maschinen und Apparatebau Dietikon AG
Original Assignee
MADAG Maschinen- und Apparatebau Dietikon AG
Madag Maschinen und Apparatebau Dietikon 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 MADAG Maschinen- und Apparatebau Dietikon AG, Madag Maschinen und Apparatebau Dietikon AG filed Critical MADAG Maschinen- und Apparatebau Dietikon AG
Publication of EP0537649A1 publication Critical patent/EP0537649A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F17/00—Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • B41F17/001—Pad printing apparatus or machines

Definitions

  • the invention relates to a pad printing machine with at least one printing plate, at least one pad which is fastened in a printing device and which can be moved by means of the latter in a color pickup position against the printing plate and in a printing position against a workpiece to be printed, and with a cliché dyeing device.
  • Pad printing machines and the corresponding printing principle have been known for a long time, for which purpose e.g. can be referred to US-PS 463 655.
  • a tampon i.e. an elastic ink transfer body, is lowered onto a previously colored printing plate. The ink reaches the tampon and is then transferred to a workpiece by means of this.
  • the printing ink is distributed from the open ink tray with a spatula over the cliché and this is then scraped off with a squeegee, so that the printing ink is only present in the recesses of the cliché and is transferred from the cliché to a workpiece with the pad can be.
  • Solvents from the printing ink continuously evaporate from the open ink tray and from the colored, not yet scraped cliché. This is undesirable because it changes the viscosity of the printing ink during operation, the ink dries in places and the evaporating solvent gets into the environment.
  • the diameter of the pot-like hollow bodies is limited due to the squeegee effect, so that they can only be used with correspondingly small clichés. Furthermore, a complex, very precise machining of the edge is necessary so that the required doctoring effect can be achieved. However, the squeegee effect can wear off over time, so that the edge has to be reworked.
  • the task is to create a pad printing machine with a cliché dyeing device, with which the evaporation of solvent from the ink container is prevented without there being a fundamental size limitation for the clichés and which does not require any complex components to be processed.
  • the size of the ink container is not limited, so that large printing clichés can also be used.
  • a conventional doctor blade can be used for doctoring. Since the opening of the paint container remains essentially closed during the entire operation, only small amounts of solvent can evaporate.
  • the container can contain an ink supply sufficient for several days of operation.
  • Figure 1 shows the general structure of a pad printing machine according to the invention. It has a tampon 1, which is arranged in a pivotable pressure device 2, which is arranged at the front in a gallows-like housing part 3 above a workpiece mounting 27.
  • the tampon 1 can be pivoted about a horizontal axis 28 into the positions shown in broken lines by means of the printing device 2. In a swiveled-back position, the tampon can be extended radially against a printing plate and in a vertical position against a workpiece.
  • a cliché dyeing device 4 is arranged in a position inclined to the horizontal plane, so that it lies opposite the swung-back tampon 1. It defines an inclined plane in which the printing plate (not shown in Fig. 1) lies.
  • the cliché dyeing device 4 forms a structural unit which is fastened to the housing of the machine and can be pivoted about an axis 6 (FIG. 3) perpendicular to the cliché plane for adjustment purposes by means of an adjusting screw 5. Laterally there are two rollers 7, 8 for a tampon cleaning belt 9 which is passed through the dyeing device.
  • FIG. 3 shows in particular the cliché dyeing device in a section through the paint container 10.
  • the printing plate 11 is shown in its upper position, in which the printing plate lies opposite the tampon in its pivoted-back position.
  • the extension direction of the tampon 1 is then perpendicular to the plane of the cliché.
  • the printing cliché 11 is fastened in a frame-like cliché holder 12.
  • the cliché holder 12 is suspended on both sides in slides 13, which are arranged in laterally arranged channels are pneumatically displaceable over the height of the dyeing device. This allows the cliché holder 12 with the printing cliché to be immersed in the ink container 10 and then moved back into its upper position for the ink transfer to the tampon.
  • the paint container 10 is designed as a standing tub open at the top. In its lower part 14 it does not have much larger dimensions than the cliché holder 12 with the printing cliché and expands into an expansion space 15 at the top. On the one hand, this ensures that the ink is mixed well each time the printing cliché is immersed, and on the other hand, the expansion space is used to hold a supply of ink for longer operation.
  • a doctor blade 17 is arranged on a doctor blade holder 18 above the opening 16 of the ink container.
  • the squeegee holder 18 is designed as a rocker which can be pivoted about a rocking axis 20 by means of a pneumatically operated plunger 19.
  • the squeegee holder 18 is pivoted back slightly, so that the squeegee 17 is lifted off the cliché.
  • the squeegee holder is pivoted forward, so that the squeegee 17 presses against the surface of the cliché with a certain pressure and scrapes off the excess ink that drips back into the ink container 10.
  • a squeegee 21 made of plastic is arranged opposite the squeegee 17 for stripping off the paint from the back of the cliché holder 12. Likewise, lateral scrapers 22 are provided. Due to the pressing force of the squeegee 17, the cliché holder 12 is pressed with the back against the squeegee 21 when it is removed from the ink container. The stripped paint drips back into the paint container 10.
  • the cliché holder 12 is shown in its upper position. As can be seen from this figure, the ink container 10 also remains in this position essentially closed, in that the squeegee holder 18, the squeegee 17, the cliché holder 12 and the stripper 21 together form an upper end (cf. also FIG. 2).
  • the operation of the device described now runs as follows. First, the printing plate 11 with the plate holder 12 is immersed in the ink container 10, the squeegee 17 being slightly lifted off. By immersing the paint in the paint container 10 is mixed and the color level is raised so that it is in any case above the upper edge of the cliché. Then the squeegee 17 is pressed against the cliché 11 and this is moved into its ink transfer position. The cliché 11 is scraped off and the color is stripped off the cliché holder 12. In the ink transfer position of the printing plate 11, the swung-back tampon 1 is lowered onto it (FIG. 4). The angular position of the cliché 11 about the tampon axis can be adjusted with the adjusting screw 5 already mentioned. A further adjusting screw 23 is provided for adjusting the height. In this way, the position of the printed image with respect to the tampon 1 can be adjusted.
  • the tampon 1 is pivoted into its vertical position and lowered onto the workpiece to be printed (FIG. 5).
  • the cliché can already be immersed in the paint container 10, etc.
  • the pad printing machine described is suitable for the arrangement of a pad cleaning device.
  • the cleaning belt is guided between the two rollers 7, 8 over a table 24 which lies behind the printing plate 11 and is released when the plate is immersed in the ink container 10.
  • the tampon is then lowered onto the cleaning belt in its pivoted-back position and thus cleaned.
  • a corresponding refill device can be provided.
  • the solvent is supplied to the paint container in a controlled manner from a solvent container 25.
  • the control is carried out, for example, by force transducers 26 at the bottom of the paint container, which measure the frictional force to which the cliché is subjected when immersed in the paint and which acts as a reaction force on the paint container. If the viscosity of the paint increases due to loss of solvent, the frictional force increases.
  • Appropriate calibration can be used to control the refilling of solvents.
  • the mixing with the color is done, as described, by immersing the cliché itself.
  • the squeegee holder 18, the cliché holder 12 and the ink container 10 can be removed in a few simple steps. Mechanical safeguards are provided to block the machine movements when the squeegee holder is removed.
  • the paint container 10 can be provided with removable inserts (not shown), which have essentially the same shape and allow a quick exchange of the paint without time-consuming cleaning.
  • a cleaning trough or cleaning device can also be provided for cleaning the cliché 11 and the cliché holder 12.
  • the machine described permits printing operation with low solvent losses for clichés with an inherently unlimited size.
  • a conventional squeegee can be used which does not require complex processing. Since the color quality does not deteriorate with the duration of the printing operation due to solvent losses and a large ink supply is available, the machine is particularly suitable for automatic continuous operation. For this, the combination with a tampon cleaning device is particularly advantageous.

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  • Printing Methods (AREA)
EP92117348A 1991-10-14 1992-10-10 Machine d'impression à tampon avec dispositif d'encrage fermé Withdrawn EP0537649A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3008/91 1991-10-14
CH300891 1991-10-14

Publications (1)

Publication Number Publication Date
EP0537649A1 true EP0537649A1 (fr) 1993-04-21

Family

ID=4246557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117348A Withdrawn EP0537649A1 (fr) 1991-10-14 1992-10-10 Machine d'impression à tampon avec dispositif d'encrage fermé

Country Status (1)

Country Link
EP (1) EP0537649A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644367A1 (de) * 1996-10-25 1998-04-30 Tampoflex Gmbh Antriebsvorrichtung für einen Schwenkkopf
WO1999015334A1 (fr) * 1997-09-22 1999-04-01 Telefonaktiebolaget Lm Ericsson (Publ) Procede de transfert d'une image sur une surface
DE102008046487A1 (de) * 2008-09-09 2010-03-11 Itw Morlock Gmbh Tampondruckmaschine
CN103481651A (zh) * 2013-09-07 2014-01-01 张家港市杨舍丝印工艺厂 商标印刷机及商标带防拉断的控制方法
CN108297536A (zh) * 2018-01-31 2018-07-20 东莞市铧美电子有限公司 一种三面自动油盅式移印机
CN110539553A (zh) * 2019-09-24 2019-12-06 东莞广华汽车饰件科技有限公司 一种充气式移印装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140165A2 (fr) * 1983-09-29 1985-05-08 Wilfried Philipp Machine pour l'impression au tampon

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0140165A2 (fr) * 1983-09-29 1985-05-08 Wilfried Philipp Machine pour l'impression au tampon

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19644367A1 (de) * 1996-10-25 1998-04-30 Tampoflex Gmbh Antriebsvorrichtung für einen Schwenkkopf
WO1999015334A1 (fr) * 1997-09-22 1999-04-01 Telefonaktiebolaget Lm Ericsson (Publ) Procede de transfert d'une image sur une surface
US6158341A (en) * 1997-09-22 2000-12-12 Telefonaktiebolaget L M Ericsson (Publ) Method for transferring a picture to a surface
DE102008046487A1 (de) * 2008-09-09 2010-03-11 Itw Morlock Gmbh Tampondruckmaschine
US8904928B2 (en) 2008-09-09 2014-12-09 Itw Morlock Gmbh Pad printing machine
CN103481651A (zh) * 2013-09-07 2014-01-01 张家港市杨舍丝印工艺厂 商标印刷机及商标带防拉断的控制方法
CN108297536A (zh) * 2018-01-31 2018-07-20 东莞市铧美电子有限公司 一种三面自动油盅式移印机
CN108297536B (zh) * 2018-01-31 2024-05-07 东莞市铧美电子有限公司 一种三面自动油盅式移印机
CN110539553A (zh) * 2019-09-24 2019-12-06 东莞广华汽车饰件科技有限公司 一种充气式移印装置

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