EP0884183A2 - Monitoring equipment in an automatic screen printing device - Google Patents

Monitoring equipment in an automatic screen printing device Download PDF

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Publication number
EP0884183A2
EP0884183A2 EP98401395A EP98401395A EP0884183A2 EP 0884183 A2 EP0884183 A2 EP 0884183A2 EP 98401395 A EP98401395 A EP 98401395A EP 98401395 A EP98401395 A EP 98401395A EP 0884183 A2 EP0884183 A2 EP 0884183A2
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EP
European Patent Office
Prior art keywords
printing
screen printing
frame
monitoring equipment
optical monitoring
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
EP98401395A
Other languages
German (de)
French (fr)
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EP0884183B1 (en
EP0884183A3 (en
Inventor
Knut Dahlhoff
Engin Yaman
Benno Patocki
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.)
Saint Gobain Glass France SAS
Original Assignee
Saint Gobain Vitrage SA
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Publication date
Application filed by Saint Gobain Vitrage SA filed Critical Saint Gobain Vitrage SA
Publication of EP0884183A2 publication Critical patent/EP0884183A2/en
Publication of EP0884183A3 publication Critical patent/EP0884183A3/en
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Publication of EP0884183B1 publication Critical patent/EP0884183B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0813—Machines for printing sheets with flat screens
    • B41F15/0818—Machines for printing sheets with flat screens with a stationary screen and a moving squeegee
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors

Definitions

  • the present invention relates to an automatic screen printing device for printing glazing, comprising a frame on which a printing plate surmounted by a screen printing frame provided means of vertical translation, and a movable squeegee capable of driving ink by screen printing through the lower part of the printing frame.
  • the screen printing technique is widely used during manufacturing automotive glass.
  • the manufacture of rear glasses that can to be electrically heated requires, for the application of a heating conductors from conductive screen printing ink electricity and for printing a decorative frame from ink bake opaque, two automatic screen printing devices each followed by a dryer, which are arranged one behind the other on the line of manufacturing.
  • the object of the invention is to propose an automatic device for serigraphy of the type mentioned in the preamble so that the disturbances, during which the screen printing chassis is damaged or destroyed, are detected automatically and on time and that appropriate measures can be taken to prevent damage to them result.
  • equipment for optical monitoring arranged in the space between the tray and the screen printing frame, said equipment being connected to an evaluation circuit capable of interrupting printing.
  • the evaluation circuit When detecting a foreign object in the interval monitored by the aforementioned equipment, the evaluation circuit interrupts printing.
  • the optical monitoring equipment can for example consist of a light curtain consisting of a row of light barriers individual, each of these dams comprising a transmitter and a receiver.
  • the distance between neighboring light barriers determines in this case the size of foreign bodies that can be detected.
  • the monitoring device optic consists of a CCD camera, with evaluation software suitable which monitors the intermediate interval between the print bed and the lower part of the screen printing frame in front of a background defined.
  • Optical monitoring equipment is preferably attached to the tray printing. It is however also possible to mount it on the frame of the aforementioned device, on the screen printing frame or on a frame clean.
  • the interval between the print bed and the print frame screen printing is monitored by optical monitoring equipment to detect foreign bodies not only during the printing process described above, but also during the lifting of the chassis printing.
  • This is particularly the case for screen printing ink when drips onto the printing table top through a tear in the form of screen printing.
  • a tear in the screen printing fabric of the form of serigraphy can result from the permanent friction of the squeegee on the face upper or contact of sharp edges of the glazing with the underside of the screen printing frame. Of course, further destruction large extent of the chassis are also detected in the fabric of serigraphy then relaxed.
  • the optical surveillance equipment After detection of the foreign body, the optical surveillance equipment sends a signal to the evaluation circuit which is connected to the control of the automatic screen printing device.
  • the evaluation circuit which can be integrated in the monitoring equipment, and the control are programmed so that the monitoring equipment is only activated when the chassis form is in the raised position, so that a single body stranger causes immediate interruption of the printing operation and not not a moving machine part of the screen printing device.
  • a screen printing machine suitable for printing glazing 7 essentially comprises a printing table consisting of a frame 1 and a printing plate 2, as well as a printing element, arranged above of the printing plate, consisting of the squeegee 4 and a frame 3 'screen printing on which is stretched a 3 "stencil screen. 3 'screen printing and 3 "stencil screen together form the printing frame screen-printed 3 which is removably enclosed in a retaining frame 12.
  • the drive and guide means of the squeegee 4 are not shown here and are of classical construction.
  • the retaining frame 12, in which the screen printing frame 3 is mounted, is connected to the plate printing 2 by means of cylinder and piston cylinders 6 and their 6 'piston rods.
  • Fasteners 8 are provided on the printing plate 2, to which, on one side of the screen printing machine, is preferably fixed on all of its lateral length, a row of transmitters 9 arranged one behind the other. On the opposite side is fixed a row of receivers 10 associated with transmitters 9.
  • the transmitters 9 send light beams 11 which cross the gap A located between the printing plate 2 and the part bottom of the screen printing frame 3 and which are received by the receivers 10.
  • the light beams 11 therefore form a light curtain more or less closed.
  • a distance between the light beams 11 of approximately 5 to 8 mm has proven to be adequate to be sure to detect all bodies strangers.
  • a printing cycle of the screen printing device comprising optical monitoring equipment proceeds as follows: the glazing 7 is first deposited on the printing plate 2.
  • the screen printing frame 3 is then lowered, by means of the hydraulic cylinders 6 and the piston rods 6 ', to an extent such that the distance between the glazing 7 and the stencil screen 3 "is only a few millimeters.
  • the squeegee 4 is moved on the stencil screen 3" under a defined pressure and at a defined speed, so that the stencil screen 3 "comes into contact, by extension, with the glazing 7 at the place where the squeegee 4 is located and the screen printing ink 5 is transferred to the glazing 7 through the open locations of the stencil screen 3 ".
  • the hydraulic cylinders 6 again raise the screen printing frame 3 to its starting position.
  • the equipment for optical monitoring is activated so that foreign bodies present in the intermediate interval A are detected.
  • the squeegee 4 returns to its original position and distributes the screen printing ink 5 over the 3 "stencil screen, while the printed glazing 7 is removed.
  • the cycle next printing can now start with positioning the glazing Next 7.
  • the monitoring equipment is activated by the integrated evaluation circuit in receivers 10, which is connected to the control of the PLC screen printing and is programmed so that interval monitoring intermediate A between the screen printing frame 3 and the plate 2 starts from the moment the bounding surface bottom of the screen printing frame 3 crosses, when uplift after printing, the light beams 11 and ends at when the boundary surface of the 3 "stencil screen plunges again in the light beams 11, when lowering before printing. Yes, during this defined period of time, one of the light beams 11 is interrupted, either by the loose fabric of a damaged 3 "stencil screen or by dripping screen printing ink 5, a signal is sent to the order of the screen printing machine and the printing cycle is immediately automatically interrupted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Alarm Systems (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The printer comprises a base (1) which supports a printing plate (2). The base (1) has jacks (6) with piston rods (6') which carry a frame (12) and printing chassis (3). The printing plate (2) has brackets (8) at each side which bear light-emitting (9) and light-detecting units. The light beams are typically 5-8 mm apart and will detect dripping ink or drooping screen. Detection causes the printing process to be interrupted. A CCD camera may be used as an alternative to the light emitting and receiving units.

Description

La présente invention concerne un dispositif automatique de sérigraphie pour l'impression de vitrages, comprenant un bâti sur lequel est disposé un plateau d'impression surmonté d'un châssis d'impression sérigraphique pourvu de moyens de translation verticale, et une raclette mobile apte à refouler de l'encre par sérigraphie à travers la partie inférieure du châssis d'impression.The present invention relates to an automatic screen printing device for printing glazing, comprising a frame on which a printing plate surmounted by a screen printing frame provided means of vertical translation, and a movable squeegee capable of driving ink by screen printing through the lower part of the printing frame.

La technique de sérigraphie est largement utilisée lors de la fabrication de vitrages automobiles. Par exemple, la fabrication de lunettes arrière pouvant être chauffées électriquement requiert, pour l'application d'un système de conducteurs chauffants à partir d'une encre pour sérigraphie conductrice de l'électricité et pour l'impression d'un cadre de décoration à partir d'une encre à cuire opaque, deux dispositifs automatiques de sérigraphie suivis chacun d'un séchoir, lesquels sont disposés les uns derrière les autres sur la ligne de fabrication.The screen printing technique is widely used during manufacturing automotive glass. For example, the manufacture of rear glasses that can to be electrically heated requires, for the application of a heating conductors from conductive screen printing ink electricity and for printing a decorative frame from ink bake opaque, two automatic screen printing devices each followed by a dryer, which are arranged one behind the other on the line of manufacturing.

Pour la fabrication industrielle en série de vitrages imprimés, on utilise généralement des dispositifs automatiques de sérigraphie grâce auxquels tout le cycle d'impression, comprenant les étapes d'acheminement, de positionnement, d'abaissement de la forme de sérigraphie, d'impression par le mouvement de la raclette, de soulèvement du châssis d'impression sérigraphique, de transport vers le séchoir et d'étalement par le mouvement de la raclette, est exécuté automatiquement à l'aide d'une commande électronique.For industrial mass production of printed glass, usually automatic screen printing devices whereby everything the printing cycle, including the routing steps, positioning, lowering the screen printing form, printing by squeegee movement, lifting the printing frame screen printing, transport to the dryer and spreading by the movement of the squeegee, is executed automatically using a command electronic.

Dans la pratique, malgré le déroulement automatique du processus d'impression, un opérateur doit toutefois être présent au niveau de chaque dispositif automatique de sérigraphie afin d'intervenir lors de perturbations.In practice, despite the automatic process However, an operator must be present at each automatic screen printing device to intervene during disturbances.

Plus particulièrement, des perturbations, lors desquelles le châssis d'impression sérigraphique est endommagé ou détruit, par usure ou par des débris de verre, provoquent, lorsqu'elles ne sont pas détectées immédiatement, des pertes de production et, dans certaines circonstances, des coûts de réparation élevés. L'encre pour sérigraphie peut en effet accéder, en raison du châssis d'impression sérigraphique défectueux, au plateau d'impression et est transférée par les vitrages suivants, par leur face inférieure, sur les bandes transporteuses et les rouleaux transporteurs du dispositif automatique de sérigraphie, du séchoir et des dispositifs de production montés en aval. Le nettoyage alors nécessaire est réalisé par un lavage à la main, au moyen d'un solvant, de chaque pièce de machine encrassée, ce qui demande un temps considérable et génère des coûts de main-d'oeuvre élevés.More particularly, disturbances, during which the chassis screen printing is damaged or destroyed, by wear or by broken glass, cause, when it is not detected production losses immediately and, in certain circumstances, high repair costs. Screen printing ink can indeed access, due to defective screen printing frame, on tray and is transferred by the following panes, by their face lower, on the conveyor belts and the transport rollers automatic screen printing device, dryer and production mounted downstream. The cleaning then necessary is carried out by a hand wash each solvent part with solvent dirty, which requires considerable time and generates high workforce.

L'invention a pour but de proposer un dispositif automatique de sérigraphie du type mentionné dans le préambule de telle sorte que les perturbations, lors desquelles le châssis d'impression sérigraphique est endommagé ou détruit, soient détectées automatiquement et à temps et que des mesures appropriées puissent être prises pour empêcher les dégâts qui en résultent.The object of the invention is to propose an automatic device for serigraphy of the type mentioned in the preamble so that the disturbances, during which the screen printing chassis is damaged or destroyed, are detected automatically and on time and that appropriate measures can be taken to prevent damage to them result.

Ce but est atteint conformément à l'invention par un équipement de surveillance optique disposé dans l'intervalle situé entre le plateau d'impression et le châssis d'impression sérigraphique, ledit équipement étant relié à un circuit d'évaluation apte à interrompre l'impression.This object is achieved in accordance with the invention by equipment for optical monitoring arranged in the space between the tray and the screen printing frame, said equipment being connected to an evaluation circuit capable of interrupting printing.

Lors de la détection d'un corps étranger dans l'intervalle surveillé par l'équipement précité, le circuit d'évaluation interrompt l'impression.When detecting a foreign object in the interval monitored by the aforementioned equipment, the evaluation circuit interrupts printing.

L'équipement de surveillance optique peut par exemple consister en un rideau lumineux constitué d'une rangée de barrages photoélectriques individuels, chacun de ces barrages comportant un émetteur et un récepteur. La distance entre les barrages photoélectriques voisins détermine dans ce cas la taille des corps étrangers qui peuvent être détectés.The optical monitoring equipment can for example consist of a light curtain consisting of a row of light barriers individual, each of these dams comprising a transmitter and a receiver. The distance between neighboring light barriers determines in this case the size of foreign bodies that can be detected.

Suivant une autre forme de réalisation, le dispositif de surveillance optique est constitué par une caméra CCD, avec un logiciel d'évaluation approprié qui surveille l'intervalle intermédiaire entre le plateau d'impression et la partie inférieure du châssis d'impression sérigraphique devant un arrière-plan défini.According to another embodiment, the monitoring device optic consists of a CCD camera, with evaluation software suitable which monitors the intermediate interval between the print bed and the lower part of the screen printing frame in front of a background defined.

L'équipement de surveillance optique est de préférence fixé au plateau d'impression. Il est toutefois également possible de le monter sur le bâti du dispositif précité, sur le châssis d'impression sérigraphique ou sur un bâti propre.Optical monitoring equipment is preferably attached to the tray printing. It is however also possible to mount it on the frame of the aforementioned device, on the screen printing frame or on a frame clean.

Dans le cas du dispositif sérigraphique conforme à l'invention, l'intervalle situé entre le plateau d'impression et le châssis d'impression sérigraphique est surveillé par un équipement de surveillance optique afin de détecter les corps étrangers non seulement lors du processus d'impression décrit ci-dessus, mais également pendant le soulèvement du châssis d'impression. Tel est le cas en particulier de l'encre pour sérigraphie lorsqu'elle dégouline sur le plateau de table d'impression par une déchirure dans la forme de sérigraphie. Une telle déchirure dans le tissu de sérigraphie de la forme de sérigraphie peut résulter du frottement permanent de la raclette sur la face supérieure ou du contact de bords vifs du vitrage avec la face inférieure du châssis d'impression sérigraphique. Bien entendu, des destructions de plus grande ampleur du châssis sont également détectées au niveau du tissu de sérigraphie alors détendu.In the case of the screen printing device according to the invention, the interval between the print bed and the print frame screen printing is monitored by optical monitoring equipment to detect foreign bodies not only during the printing process described above, but also during the lifting of the chassis printing. This is particularly the case for screen printing ink when drips onto the printing table top through a tear in the form of screen printing. Such a tear in the screen printing fabric of the form of serigraphy can result from the permanent friction of the squeegee on the face upper or contact of sharp edges of the glazing with the underside of the screen printing frame. Of course, further destruction large extent of the chassis are also detected in the fabric of serigraphy then relaxed.

Après détection du corps étranger, l'équipement de surveillance optique envoie un signal au circuit d'évaluation qui est connecté à la commande du dispositif automatique de sérigraphie. Le circuit d'évaluation, qui peut être intégré dans l'équipement de surveillance, et la commande sont programmés de telle sorte que l'équipement de surveillance ne soit activé que lorsque le châssis forme se trouve dans la position soulevée, de sorte qu'un seul corps étranger provoque l'interruption immédiate de l'opération d'impression et non pas une pièce de machine en mouvement du dispositif de sérigraphie.After detection of the foreign body, the optical surveillance equipment sends a signal to the evaluation circuit which is connected to the control of the automatic screen printing device. The evaluation circuit, which can be integrated in the monitoring equipment, and the control are programmed so that the monitoring equipment is only activated when the chassis form is in the raised position, so that a single body stranger causes immediate interruption of the printing operation and not not a moving machine part of the screen printing device.

D'autres particularités et avantages de l'invention ressortiront des revendications dépendantes et de la description suivante d'un exemple de réalisation préféré d'un automate de sérigraphie conforme à l'invention, donné en référence au dessin annexé.Other features and advantages of the invention will emerge from dependent claims and the following description of an example of preferred embodiment of a screen printing machine in accordance with the invention, given with reference to the accompanying drawing.

L'unique figure est une représentation schématique en coupe d'un automate de sérigraphie présentant les particularités de l'invention. The only figure is a schematic sectional representation of a screen printing machine having the features of the invention.

Un automate de sérigraphie approprié pour l'impression de vitrages 7 comprend essentiellement une table d'impression constituée d'un bâti 1 et d'un plateau d'impression 2, ainsi qu'un élément d'impression, disposé au-dessus du plateau d'impression, constitué de la raclette 4 et d'un cadre de sérigraphie 3' sur lequel est tendu un écran pochoir 3". Le cadre de sérigraphie 3' et l'écran pochoir 3" forment ensemble le châssis d'impression sérigraphique 3 qui est enserrée de manière amovible dans un cadre de retenue 12. Les moyens d'entraínement et de guidage de la raclette 4 ne sont pas représentés ici et sont de construction classique. Le cadre de retenue 12, dans lequel le châssis d'impression sérigraphique 3 est monté, est relié au plateau d'impression 2 par l'intermédiaire de vérins à cylindre et piston 6 et de leurs tiges de pistons 6'.A screen printing machine suitable for printing glazing 7 essentially comprises a printing table consisting of a frame 1 and a printing plate 2, as well as a printing element, arranged above of the printing plate, consisting of the squeegee 4 and a frame 3 'screen printing on which is stretched a 3 "stencil screen. 3 'screen printing and 3 "stencil screen together form the printing frame screen-printed 3 which is removably enclosed in a retaining frame 12. The drive and guide means of the squeegee 4 are not shown here and are of classical construction. The retaining frame 12, in which the screen printing frame 3 is mounted, is connected to the plate printing 2 by means of cylinder and piston cylinders 6 and their 6 'piston rods.

Des fixations 8 sont prévues sur le plateau d'impression 2, auxquelles, sur un côté de l'automate de sérigraphie, est fixée de préférence sur toute sa longueur latérale, une rangée d'émetteurs 9 disposés les uns derrière les autres. Sur le côté opposé est fixée une rangée de récepteurs 10 associés aux émetteurs 9. Les émetteurs 9 envoient des faisceaux lumineux 11 qui traversent l'intervalle A situé entre le plateau d'impression 2 et la partie inférieure du châssis d'impression sérigraphique 3 et qui sont reçus par les récepteurs 10. Les faisceaux lumineux 11 forment donc un rideau lumineux plus ou moins fermé. Une distance entre les faisceaux lumineux 11 d'environ 5 à 8 mm s'est avérée adéquate pour être sûr de détecter tous les corps étrangers.Fasteners 8 are provided on the printing plate 2, to which, on one side of the screen printing machine, is preferably fixed on all of its lateral length, a row of transmitters 9 arranged one behind the other. On the opposite side is fixed a row of receivers 10 associated with transmitters 9. The transmitters 9 send light beams 11 which cross the gap A located between the printing plate 2 and the part bottom of the screen printing frame 3 and which are received by the receivers 10. The light beams 11 therefore form a light curtain more or less closed. A distance between the light beams 11 of approximately 5 to 8 mm has proven to be adequate to be sure to detect all bodies strangers.

Un cycle d'impression du dispositif de sérigraphie comportant un équipement de surveillance optique se déroule comme suit :
   le vitrage 7 est tout d'abord déposé sur le plateau d'impression 2. Le châssis d'impression sérigraphique 3 est ensuite abaissée, par l'intermédiaire des vérins hydrauliques 6 et des tiges de pistons 6', dans une mesure telle que la distance entre le vitrage 7 et l'écran pochoir 3" n'atteigne plus que quelques millimètres. Puis, la raclette 4 est déplacée sur l'écran pochoir 3" sous une pression définie et à une vitesse définie, de telle sorte que l'écran pochoir 3" entre en contact, par extension, avec le vitrage 7 à l'endroit où la raclette 4 se trouve et que l'encre pour sérigraphie 5 soit transférée sur le vitrage 7 à travers les endroits ouverts de l'écran pochoir 3" . Une fois que la raclette 4 a atteint sa position finale, les vérins hydrauliques 6 soulèvent à nouveau le châssis d'impression sérigraphique 3 dans sa position de départ.A printing cycle of the screen printing device comprising optical monitoring equipment proceeds as follows:
the glazing 7 is first deposited on the printing plate 2. The screen printing frame 3 is then lowered, by means of the hydraulic cylinders 6 and the piston rods 6 ', to an extent such that the distance between the glazing 7 and the stencil screen 3 "is only a few millimeters. Then, the squeegee 4 is moved on the stencil screen 3" under a defined pressure and at a defined speed, so that the stencil screen 3 "comes into contact, by extension, with the glazing 7 at the place where the squeegee 4 is located and the screen printing ink 5 is transferred to the glazing 7 through the open locations of the stencil screen 3 ". Once the squeegee 4 has reached its final position, the hydraulic cylinders 6 again raise the screen printing frame 3 to its starting position.

Dès que la forme de sérigraphie 3 a libéré l'intervalle A, l'équipement de surveillance optique est activé de telle sorte que les corps étrangers présents dans l'intervalle intermédiaire A soient détectés. Durant ce temps, la raclette 4 retourne dans sa position de départ et répartit l'encre pour sérigraphie 5 sur l'écran pochoir 3", tandis que le vitrage imprimé 7 est évacué. Le cycle d'impression suivant peut désormais débuter par le positionnement du vitrage 7 suivant.As soon as the screen printing form 3 has released the interval A, the equipment for optical monitoring is activated so that foreign bodies present in the intermediate interval A are detected. During this time, the squeegee 4 returns to its original position and distributes the screen printing ink 5 over the 3 "stencil screen, while the printed glazing 7 is removed. The cycle next printing can now start with positioning the glazing Next 7.

L'équipement de surveillance est activé par le circuit d'évaluation intégré dans les récepteurs 10, qui est connecté à la commande de l'automate de sérigraphie et est programmé de telle sorte que la surveillance de l'intervalle intermédiaire A entre le châssis d'impression sérigraphique 3 et le plateau d'impression 2 démarre à partir du moment où la surface de délimitation inférieure du châssis d'impression sérigraphique 3 traverse, lors du soulèvement après l'impression, les faisceaux lumineux 11 et se termine au moment où la surface de délimitation de l'écran pochoir 3" plonge à nouveau dans les faisceaux lumineux 11, lors de l'abaissement avant l'impression. Si, pendant ce laps de temps défini, un des faisceaux lumineux 11 est interrompu, que ce soit par le tissu détendu d'un écran pochoir 3" endommagé ou par de l'encre pour sérigraphie 5 dégoulinante, un signal est transmis à la commande de l'automate de sérigraphie et le cycle d'impression est immédiatement interrompu automatiquement.The monitoring equipment is activated by the integrated evaluation circuit in receivers 10, which is connected to the control of the PLC screen printing and is programmed so that interval monitoring intermediate A between the screen printing frame 3 and the plate 2 starts from the moment the bounding surface bottom of the screen printing frame 3 crosses, when uplift after printing, the light beams 11 and ends at when the boundary surface of the 3 "stencil screen plunges again in the light beams 11, when lowering before printing. Yes, during this defined period of time, one of the light beams 11 is interrupted, either by the loose fabric of a damaged 3 "stencil screen or by dripping screen printing ink 5, a signal is sent to the order of the screen printing machine and the printing cycle is immediately automatically interrupted.

Claims (6)

Dispositif automatique de sérigraphie pour l'impression de vitrages, comprenant un bâti (1) sur lequel est disposé un plateau (2) d'impression surmonté d'un châssis d'impression sérigraphique (3) pourvu de moyens de translation verticale (6) et une raclette (4) mobile apte à refouler de l'encre par sérigraphie à travers la partie inférieure du châssis d'impression, caractérisé en qu'un équipement de surveillance optique (9, 10) est disposé dans l'intervalle (A) situé entre le plateau (2) et la partie inférieure dudit châssis d'impression, ledit équipement étant relié à un circuit d'évaluation apte à interrompre l'impression.Automatic screen printing device for printing glazing, comprising a frame (1) on which is disposed a printing plate (2) surmounted by a screen printing frame (3) provided with means for vertical translation (6) and a movable squeegee (4) capable of discharging ink by screen printing through the lower part of the printing frame, characterized in that an optical monitoring equipment (9, 10) is arranged in the interval (A) located between the plate (2) and the lower part of said printing frame, said equipment being connected to an evaluation circuit capable of interrupting printing. Dispositif suivant la revendication 1, caractérisé en ce que l'équipement de surveillance optique consiste en un rideau lumineux constitué d'une pluralité de barrages photoélectriques (9, 11, 10) espacés les uns des autres de quelques millimètres.Device according to claim 1, characterized in that the optical monitoring equipment consists of a light curtain made up of a plurality of light barriers (9, 11, 10) spaced from one another by a few millimeters. Dispositif suivant la revendication 1, caractérisé en ce que l'équipement de surveillance optique est constitué d'une caméra CCD et d'un logiciel d'évaluation approprié.Device according to claim 1, characterized in that the optical monitoring equipment consists of a CCD camera and appropriate evaluation software. Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que l'équipement de surveillance optique (9, 10) est fixé au plateau (2).Device according to any one of Claims 1 to 3, characterized in that the optical monitoring equipment (9, 10) is fixed to the plate (2). Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que l'équipement de surveillance optique (9, 10) est fixé au bâti (1).Device according to any one of Claims 1 to 3, characterized in that the optical monitoring equipment (9, 10) is fixed to the frame (1). Dispositif suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que l'équipement de surveillance optique (9, 10) est fixé au châssis d'impression (3).Device according to any one of Claims 1 to 3, characterized in that the optical monitoring equipment (9, 10) is fixed to the printing frame (3).
EP98401395A 1997-06-12 1998-06-10 Monitoring equipment in an automatic screen printing device Expired - Lifetime EP0884183B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19724829 1997-06-12
DE19724829A DE19724829C2 (en) 1997-06-12 1997-06-12 Screen printing machine for printing on glass panes

Publications (3)

Publication Number Publication Date
EP0884183A2 true EP0884183A2 (en) 1998-12-16
EP0884183A3 EP0884183A3 (en) 1999-05-26
EP0884183B1 EP0884183B1 (en) 2002-10-02

Family

ID=7832260

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EP98401395A Expired - Lifetime EP0884183B1 (en) 1997-06-12 1998-06-10 Monitoring equipment in an automatic screen printing device

Country Status (6)

Country Link
EP (1) EP0884183B1 (en)
JP (1) JPH1148442A (en)
AT (1) ATE225258T1 (en)
DE (2) DE19724829C2 (en)
ES (1) ES2184205T3 (en)
PT (1) PT884183E (en)

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GB2353759A (en) * 1999-08-30 2001-03-07 Minami Co Ltd A screen printing apparatus with a camera for checking and inspection
CN103857190A (en) * 2014-01-21 2014-06-11 田茂福 Preparation method for FPC board
CN106696445A (en) * 2016-11-18 2017-05-24 江苏智子自动化科技有限公司 Eight-column lifting device for silk-screen printing machine
CN109397851A (en) * 2018-11-16 2019-03-01 罗博特科智能科技股份有限公司 A kind of adjustable printing equipment
CN113910793A (en) * 2021-11-05 2022-01-11 东莞市中麒光电技术有限公司 LED display module manufacturing method and LED display module

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JP5263838B2 (en) * 2009-12-14 2013-08-14 シャープ株式会社 Printing apparatus and inspection method
JP5488272B2 (en) * 2010-07-08 2014-05-14 パナソニック株式会社 Screen printer and method for detecting foreign matter in screen printer
CN104842633B (en) * 2015-04-17 2017-12-26 东莞市优印精密自动化设备有限公司 A kind of automatic silk screen printing equipment and its screen printing method
CN106364143B (en) * 2016-10-28 2018-12-11 东莞市意艾迪数控科技有限公司 A kind of automatic screen-printing machine and its production line
CN112721441B (en) * 2020-12-23 2022-05-06 江苏省高淳印刷股份有限公司 Printing quality detection device of printing machine
CN114523759B (en) * 2022-02-25 2023-05-16 云南大学滇池学院 Pressure regulating and locking device of screen printer
CN115366535A (en) * 2022-08-22 2022-11-22 江苏润阳世纪光伏科技有限公司 Real-time monitoring device and monitoring method for screen plate explosion

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2353759A (en) * 1999-08-30 2001-03-07 Minami Co Ltd A screen printing apparatus with a camera for checking and inspection
GB2353759B (en) * 1999-08-30 2004-02-11 Minami Co Ltd Screen printing apparatus
CN103857190A (en) * 2014-01-21 2014-06-11 田茂福 Preparation method for FPC board
CN106696445A (en) * 2016-11-18 2017-05-24 江苏智子自动化科技有限公司 Eight-column lifting device for silk-screen printing machine
CN106696445B (en) * 2016-11-18 2019-06-21 江苏智子自动化科技有限公司 Eight column lifting devices of screen process press
CN109397851A (en) * 2018-11-16 2019-03-01 罗博特科智能科技股份有限公司 A kind of adjustable printing equipment
CN109397851B (en) * 2018-11-16 2023-10-13 罗博特科智能科技股份有限公司 Adjustable printing device
CN113910793A (en) * 2021-11-05 2022-01-11 东莞市中麒光电技术有限公司 LED display module manufacturing method and LED display module

Also Published As

Publication number Publication date
ATE225258T1 (en) 2002-10-15
PT884183E (en) 2003-02-28
DE19724829A1 (en) 1998-12-17
DE19724829C2 (en) 1999-03-25
DE69808376D1 (en) 2002-11-07
ES2184205T3 (en) 2003-04-01
EP0884183B1 (en) 2002-10-02
EP0884183A3 (en) 1999-05-26
JPH1148442A (en) 1999-02-23
DE69808376T2 (en) 2003-07-03

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