EP0424716B1 - Machine d'impression à tampon avec dispositif de nettoyage du tampon et procédé pour sa mise en oeuvre - Google Patents
Machine d'impression à tampon avec dispositif de nettoyage du tampon et procédé pour sa mise en oeuvre Download PDFInfo
- Publication number
- EP0424716B1 EP0424716B1 EP19900119228 EP90119228A EP0424716B1 EP 0424716 B1 EP0424716 B1 EP 0424716B1 EP 19900119228 EP19900119228 EP 19900119228 EP 90119228 A EP90119228 A EP 90119228A EP 0424716 B1 EP0424716 B1 EP 0424716B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning
- transfer
- pad
- printing
- ink
- 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.)
- Revoked
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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 tampon printing machine with at least one printing plate, at least one tampon, which is fastened in a printing device and which can be moved by means of the latter in a color recording position against the printing plate and in a printing position against a workpiece to be printed, and with a cleaning device for the tampon, which forms a cleaning surface on which the tampon can be applied for cleaning.
- the invention further relates to a method for operating such a machine.
- Pad printing machines and the corresponding printing principle have been known for a long time, for which purpose e.g. can be referred to DE-U-8 704 867.
- a tampon i.e. an elastic ink transfer body is lowered onto a previously colored printing plate. The printing ink gets onto the tampon and is then transferred to a workpiece by means of this.
- the entire printing ink comes from the tampon onto the workpiece during the printing process, so that there is no more ink on the tampon after the printing process.
- ink residues accumulate on the tampon after a number of printing processes, which necessitate periodic cleaning of the tampon.
- contaminating exudation of silicone oil from the tampon rubber can take place.
- Periodic cleaning in the event of a deterioration in the print quality is usually carried out manually by an operator today. This requires monitoring the printing press during the entire operating time. A manual cleaning process also causes an interruption in operation with a corresponding reduction in emissions. Furthermore, the tampon can easily be damaged. After all, cleaning is often only carried out after rejects with poor printing have already been produced.
- Pad printing machines have become known, in particular for multi-color printing, in which, to prevent color mixing, the pad is moved to a specially provided cleaning point before each printing process or before each color change and is printed there on a blotting paper surface.
- the construction of this machine is complex and the cleaning cycle takes a relatively long time, so that such a system cannot be used economically, in particular for single-color printing.
- the machine has a printing device 1 to which a tampon 2 can be fastened (only shown in FIG. 3).
- the printing device 1 can be moved on a carriage 3 between an ink recording position (FIG. 2) and a printing position (cf. dashed line in FIG. 5).
- the ink recording position the printing device 1 is located above a cliché carrier 4.
- the tampon can be used for ink recording with the aid of a drive, e.g. a lifting cylinder can be pneumatically lowered onto the cliché located on the cliché carrier 4.
- the inked tampon is located over a workpiece and can then be lowered onto it in order to transfer the printed image.
- the cliché Before each color recording, the cliché is provided with printing ink by means of a coloring device 5. For this purpose, it is moved from a retracted starting position across the printing plate to an extended position (Fig. 2) and moved back again, whereby 8 ink is distributed from the ink tray 7 over the cliché during the forward movement by a spatula and the cliché is doctored off with a squeegee holder with a squeegee 6 so that the printing ink is only in the deepening of the cliché is present. So far, the present printing press corresponds to conventional technology.
- the tampon printing machine has a cleaning device 10 for the tampon, which is arranged above the inking device 5.
- the cleaning device 10 essentially has a table 11, over which a cleaning belt 14 can be advanced from a supply roll 12 to a drive-holding take-up roll 13.
- the feed length is adjustable and can therefore be adapted to the pad size in order to e.g. save tape material for small tampon sizes.
- the cleaning tape 14 is preferably a one-sided coated adhesive tape with a width that is greater than the largest possible cliché width that can be processed by the machine.
- suitable absorbent cloth or paper or a statically charged tape or the like can also be used for this.
- the cleaning tape 14 is guided around the table 11 with the adhesive side facing outwards.
- the band 14 on the top of the table thus forms a cleaning surface, onto which the tampon can be lowered in its ink receiving position (FIG. 3) when the inking device 5 together with the cleaning device 10 is in the extended position above the cliché carrier 4.
- the table 11 and the tape rolls 12, 13 of the cleaning device are arranged on a U-shaped support part 15 (cf. FIG. 1) which overlaps the inking device 5 on the side.
- the inking device 5 is located on a carriage 17 which runs along a guide 18 from the starting position to an extended position and can be moved back.
- the cleaning device 10, or its supporting part 15, is coupled to the carriage 17 by means of a spring bolt 16 and moves during operation together with the latter from the initial position into the extended position, as indicated in FIG. 3, and back again.
- the tampon 2 is only lowered onto the cliché carrier 4 when the cliché is colored, i.e. when the coloring device 5, together with the cleaning device 10, has moved back to the starting position and the cliché has been released.
- the coloring device 5, together with the cleaning device 10 remains in the extended position after being extended, as shown in FIG. 3.
- the tampon 2 is now lowered onto the table 11 with a smaller stroke instead of the cliché and is cleaned there by pressing onto the belt 14. Then the tampon 2 is raised again and the cleaning device 10 is withdrawn together with the inking device, the cliché being scraped off at the same time.
- the cliché remains covered by the inking device 5 during the cleaning step, the applied printing ink does not dry, so that the tampon 2 can be lowered onto the cliché carrier 4 immediately afterwards for ink absorption for the next printing process. This is followed by normal printing cycles until the next cleaning cycle is initiated. Before the next cleaning cycle, the cleaning belt has been displaced by means of the take-up roller 13 so that the table 11 is provided with a previously unused location on the cleaning belt 14.
- the machine control system is now designed such that a cleaning cycle of the type described is inserted after an adjustable number of printing cycles.
- the control is therefore essentially limited to changing the chronological sequence of the individual movements. It is implemented, for example, by means of a microprocessor, in which the processes of the printing cycle and cleaning cycle are stored as programs.
- it is advantageous to monitor the duration of each printing cycle between ink recording and printing. If this time becomes too long for any reason, the ink dries on the tampon before it is transferred to the workpiece. In this case, cleaning of the tampon is indicated before the next printing process.
- control or the microprocessor has a time counter which is started when the color is recorded. If the printing process does not take place within a certain, adjustable time window after the ink recording, the printing cycle is interrupted and a cleaning cycle is inserted to remove the dried printing ink from the tampon.
- the table 11 of the cleaning device 10 is in operation above the inking device 5 and is moved back and forth together with the latter.
- the squeegee holder 6 must be able to be removed in order to refill the printing ink into the ink tray 7 or for cleaning and service purposes.
- the table 11 can be moved back together with the carrier 15 with respect to the slide 17 after the spring bolt 16 has been loosened (cf. FIG. 3).
- the squeegee holder 6 In the retracted position of the table 11 (see FIG. 4), the squeegee holder 6 is exposed and can be removed, so that the ink tray 7 is also accessible. If the cleaning function is not required, the machine can also be operated in this state.
- FIGS. 5 and 6 now show a further embodiment of a tampon printing machine according to the invention, which is particularly suitable for wide or several printing clichés arranged next to one another.
- This machine will not be described in detail, since its basic structure largely corresponds to the first version. The same reference numbers are therefore used.
- the main difference is that the tape rolls 12, 13 for the cleaning tape are arranged laterally on the inking device 5 with respect to the direction of displacement.
- the table 11 of the cleaning device thus extends transversely to the machine axis and has at least the width of the cliché carrier or the printing device 1, with which wide printing patterns in the manner described, ie with periodic tampon cleaning, can be attached.
- This embodiment shows that the arrangement of the cleaning tape or the tape rolls can largely be adapted to the respective requirements of the pressure. The same naturally applies to the width of the cleaning tape used in each case.
- the tampon condition and cleaning by an operator can be omitted with tampon printing machines of the type described.
- Operation can be largely automatic, with the periodic cleaning cycles ensuring adequate pad cleaning.
- the cleaning cycles themselves take up very little time, so that cleaning can be carried out relatively often without a loss of productivity, which improves the print quality and reduces the reject rate.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Claims (12)
- Machine d'impression à tampon avec au moins un cliché d'impression et un tampon (2) fixé dans un dispositif d'impression (1) pouvant l'amener en une position de transfert d'encre contre le cliché d'impression, ainsi qu'en une position d'impression contre un objet devant être imprimé, ainsi qu'avec un dispositif de nettoyage (10) du tampon (2) formant une surface de nettoyage sur laquelle le tampon peut être appliqué afin d'être nettoyé, caractérisée en ce qu'au moins pour les opérations de nettoyage le dispositif de nettoyage (10) peut être amené en une position telle qu'en sa position de transfert d'encre le tampon (2) vienne s'appliquer non contre le cliché d'impression, mais contre la surface de nettoyage (11).
- Machine d'impression à tampon selon la revendication 1, comportant en outre un dispositif encreur (5) pouvant être amené, en passant par-dessus le cliché d'impression, d'une position en retrait à une position avancée, caractérisée en ce que le dispositif de nettoyage (10) peut être mû ensemble avec le dispositif encreur (5) en la position avancée et y être positionné devant le cliché d'impression.
- Machine d'impression à tampon selon la revendication 2, caractérisée en ce que le dispositif encreur (5) comporte une spatule (8) pour répartir sur le cliché, lors du mouvement vers la position avancée, de la couleur provenant d'un récipient pour couleur, ainsi qu'un support de racle et une racle (6) pour racler le cliché lors du mouvement de retour vers la position en retrait, caractérisée en ce que la surface de nettoyage (11) du dispositif de nettoyage (10) est disposée essentiellement au-dessus de la spatule, respectivement de la racle du dispositif encreur (5), et sensiblement parallèle à la position du cliché d'impression.
- Machine d'impression à tampon selon une des revendications 2 ou 3, dans laquelle le dispositif encreur (5) est agencé sur un chariot (17) pouvant effectuer lors de chaque opération d'encrage un mouvement de la position en retrait jusqu'à la position avancée suivie d'un mouvement de retour en direction inverse, caractérisée en ce que le dispositif de nettoyage comporte une table (11) réunie au chariot (17) du dispositif encreur (5) et guidant une bande de nettoyage (14) qui forme la surface de nettoyage pour le tampon (2).
- Machine d'impression à tampon selon la revendication 4, caractérisée en ce que le dispositif de nettoyage (10) comporte un rouleau distributeur (12) et un rouleau récepteur (13) pour la bande de nettoyage (14), de manière à ce que la bande de nettoyage (14) puisse être avancée d'une certaine distance sur la table après chaque opération de nettoyage.
- Machine d'impression à tampon selon la revendication 5, caractérisée en ce que les rouleaux distributeur et récepteur (12, 13) sont agencés de façon à ce que la bande de nettoyage (14) s'étende en direction du mouvement du dispositif encreur (5), les rouleaux (12, 13) étant disposés essentiellement l'un derrière l'autre par rapport à cette direction.
- Machine d'impression à tampon selon la revendication 5, caractérisée en ce que les rouleaux distributeur et récepteur (12, 13) sont agencés de façon à ce que la bande de nettoyage s'étende transversalement par rapport à la direction du mouvement du dispositif encreur (5), les rouleaux (12, 13) étant disposés essentiellement latéralement au dispositif encreur par rapport à cette direction.
- Machine d'impression à tampon selon une des revendications 2 à 7, caractérisée en ce que le dispositif de nettoyage (10) peut être amené en une position où il est libéré du dispositif encreur (5) et en laquelle le dispositif encreur est librement accessible, en particulier pour ajouter de l'encre d'imprimerie.
- Machine d'impression à tampon selon une des revendications précédentes, caractérisée en ce que le dispositif d'impression (1) dans lequel est fixé le tampon (2) possède un dispositif de commande servant à déplacer le tampon (2) pour un transfert d'encre sur la longueur d'une première course jusqu'au cliché d'impression et à le déplacer jusqu'à la surface de nettoyage (11) sur la longueur d'une seconde course plus petite.
- Procédé pour mise en action de la machine d'impression à tampon selon une des revendications précédentes, caractérisé en ce qu'après chaque cycle d'impression, ou après un nombre choisi de tels cycles, on déclenche un cycle de nettoyage au cours duquel le tampon est pressé contre la surface de nettoyage lorsqu'il est en sa position de transfert d'encre.
- Procédé selon la revendication 10, caractérisé en ce qu'on mesure le temps écoulé depuis chaque encrage au moyen d'un compteur horométrique et qu'un cycle de nettoyage est déclenché par le dispositif de commande lorsqu'aucune opération d'impression n'a eue lieu en un laps de temps ajustable écoulé depuis le transfert d'encre.
- Procédé selon une des revendications 10 ou 11, caractérisé en ce que le temps écoulé depuis un arrêt de la machine est mesuré au moyen d'un compteur horométrique et que le dispositif de commande déclenche un cycle de nettoyage avant une mise en route ultérieure lorsque le temps ainsi mesuré excède une valeur choisie.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3859/89 | 1989-10-24 | ||
CH385989A CH679846A5 (fr) | 1989-10-24 | 1989-10-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0424716A1 EP0424716A1 (fr) | 1991-05-02 |
EP0424716B1 true EP0424716B1 (fr) | 1995-01-04 |
Family
ID=4265003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900119228 Revoked EP0424716B1 (fr) | 1989-10-24 | 1990-10-06 | Machine d'impression à tampon avec dispositif de nettoyage du tampon et procédé pour sa mise en oeuvre |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0424716B1 (fr) |
CH (1) | CH679846A5 (fr) |
DE (1) | DE59008188D1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108202528A (zh) * | 2016-12-19 | 2018-06-26 | 汉达精密电子(昆山)有限公司 | 自动清洁胶头结构 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29615093U1 (de) * | 1996-08-30 | 1996-11-28 | Tampoprint GmbH, 70825 Korntal-Münchingen | Tampondruckmaschine |
US6123021A (en) * | 1998-12-09 | 2000-09-26 | Cameron; Robert | Multiple color printer for printing on small objects |
US6393981B1 (en) | 1998-12-09 | 2002-05-28 | Robert Cameron | Multiple color printer having vertically moveable print pad |
DE19921702A1 (de) * | 1999-05-12 | 2000-11-23 | Braun Gmbh | Verfahren zum Betreiben einer Tampondruckvorrichtung sowie Tampondruckvorrichtung |
DE10038166C2 (de) * | 2000-08-04 | 2003-08-21 | Tampoprint Gmbh | Tampondruckmaschine |
CN104441946A (zh) * | 2013-09-20 | 2015-03-25 | 天津中电华利电器科技集团有限公司 | 一种微型断路器移印设备 |
CN104890356B (zh) * | 2014-03-03 | 2019-09-03 | 奔龙自动化科技有限公司 | 一种漏电断路器四色移印装置 |
CN107379744A (zh) * | 2017-07-20 | 2017-11-24 | 苏州市烨铭塑胶制品厂 | 一种红外线移印机胶头 |
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 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8528619U1 (de) * | 1985-10-08 | 1985-12-19 | TAMPOflex GmbH, 7257 Ditzingen | Tampondruckmaschine |
DE3608125A1 (de) * | 1986-03-05 | 1987-09-10 | Tampoflex Gmbh | Verfahren fuer den tampondruck |
DE8704867U1 (de) * | 1987-04-01 | 1987-05-21 | Morlock Mechanik GmbH, 7292 Baiersbronn | Tampondruckmaschine |
-
1989
- 1989-10-24 CH CH385989A patent/CH679846A5/de not_active IP Right Cessation
-
1990
- 1990-10-06 DE DE59008188T patent/DE59008188D1/de not_active Revoked
- 1990-10-06 EP EP19900119228 patent/EP0424716B1/fr not_active Revoked
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108202528A (zh) * | 2016-12-19 | 2018-06-26 | 汉达精密电子(昆山)有限公司 | 自动清洁胶头结构 |
Also Published As
Publication number | Publication date |
---|---|
DE59008188D1 (de) | 1995-02-16 |
EP0424716A1 (fr) | 1991-05-02 |
CH679846A5 (fr) | 1992-04-30 |
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