EP1844931B1 - Machine d'impression par sérigraphie - Google Patents

Machine d'impression par sérigraphie Download PDF

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Publication number
EP1844931B1
EP1844931B1 EP07290393A EP07290393A EP1844931B1 EP 1844931 B1 EP1844931 B1 EP 1844931B1 EP 07290393 A EP07290393 A EP 07290393A EP 07290393 A EP07290393 A EP 07290393A EP 1844931 B1 EP1844931 B1 EP 1844931B1
Authority
EP
European Patent Office
Prior art keywords
support
frame
relative
machine according
fixed
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.)
Not-in-force
Application number
EP07290393A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1844931A1 (fr
Inventor
François Dumenil
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.)
Machines Dubuit SAS
Original Assignee
Machines Dubuit SAS
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 Machines Dubuit SAS filed Critical Machines Dubuit SAS
Priority to PL07290393T priority Critical patent/PL1844931T3/pl
Publication of EP1844931A1 publication Critical patent/EP1844931A1/fr
Application granted granted Critical
Publication of EP1844931B1 publication Critical patent/EP1844931B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—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
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • B41F15/26—Supports for workpieces for articles with flat surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/10—Screen printing machines characterised by their constructional features
    • B41P2215/11—Registering devices
    • B41P2215/112—Registering devices with means for displacing the frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/10—Screen printing machines characterised by their constructional features
    • B41P2215/11—Registering devices
    • B41P2215/114—Registering devices with means for displacing the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/50—Screen printing machines for particular purposes
    • B41P2215/55—Screen printing machines for particular purposes for printing compact discs

Definitions

  • the invention generally relates to screen printing machines.
  • the invention relates to a screen printing machine of the aforementioned type, characterized in that the movable member of each coupling assembly is connected to the support by the slide connection means in a fixed direction relative to the support.
  • the machine represented on the figure 1 is intended for silk screen printing of flat objects, such as compact discs, telephone cards or solar cells.
  • the Conveyor 10 It comprises a supply conveyor 4 of objects to be printed 6, a printing unit 8, a conveyor for evacuating 10 correctly printed objects and an evacuation conveyor 12 for poorly printed or defective objects extending perpendicular to the Conveyor 10.
  • the conveyors 4, 10 and 12 are similar and each comprise a frame 14 and a conveyor belt 16 circulating in a loop between two parallel rollers.
  • the machine also comprises a storage tray 18, arranged next to the supply conveyor 4, able to receive in stack the objects 6 to be printed when the printing machine does not work.
  • the printing unit 8 comprises a turntable 20 located between the supply and discharge conveyors 4 and 10, and a printing station 22 located at least partially above the turntable.
  • the turntable 20 is motorized and comprises a fixed frame 24, and a circular plate 26, carried by the frame 24.
  • the plate 26 is rotatable relative to the frame 24 about a vertical axis Z.
  • the upper face of the plate 26 has three zones 28 for receiving and supporting an object 6, regularly distributed around the Z axis.
  • the zones 28 are located first facing the supply conveyor 4, a second facing the evacuation conveyor 10 and a third under the printing station 22.
  • the first zone 28 is a receiving zone of an object 6 to be printed, brought from the conveyor 4.
  • the second zone 28 is a support zone of the object 6 after printing at the station 22, waiting for evacuation to the conveyor 10 or 12.
  • the third zone 28 is a support zone of the object 6 during its printing at the station 22.
  • the machine further comprises a feed bracket 30, capable of grasping an element 6 located at the end of the supply conveyor 4, and transferring it either to the storage tray 18 or to the receiving area 28 of the tray 26 .
  • the machine also comprises an exhaust bracket 31, capable of grasping an object 6 disposed in the area 28 of the tray 26 for supporting printed objects, and transferring it to the evacuation conveyor 10, or to the evacuation conveyor 12.
  • the frame 24 also comprises two vertical support columns 32 of the printing station 22.
  • the columns 32 are fixed and stand near the plate 26, slightly away from it.
  • the printing station 22 comprises a substantially horizontal support 34, a screen-printing screen 36 fixed to the support 34, and a squeegee and counter-doctor device 38 movably mounted on the support 34.
  • the support 34 ( figures 2 and 3 ) has a general U-shape with three rectilinear branches of equal length. It delimits a central void 40.
  • the support 34 also comprises three tabs 42, 42 'and 42 "substantially square, integral with the three branches of the support 34.
  • the tabs 42 and 42' extend towards the outside of the support, from the two free ends thereof, the third leg 42 "extends outwardly from the central branch.
  • the tabs 42, 42 'and 42 "extend in the plane of the support 34.
  • the screen 36 comprises a rigid square frame 44, and a mesh, not shown, stretched in the center of the frame 44.
  • This mesh consists of threads, for example silk threads, arranged according to the pattern to be printed on the objects 6.
  • the sides of the frame 44 have a length substantially equal to that of the branches of the support 34.
  • the printing station 22 also comprises two brackets 46 forming flanges of the frame 44 on a lower face of the support 34.
  • the brackets 46 are arranged under the two parallel and opposite branches of the support 34.
  • the support 34 is located cantilevered above the turntable 26, so that the screen 36 is immediately above the area 28 supporting the object to be printed.
  • the scraper device 38 comprises two scrapers 48, a carriage 50 carrying the scrapers 48, means not shown for moving the carriage 50 in a horizontal plane relative to the support 34, and a jack 52 able to move the scrapers 48 vertically relative to each other. to the cart 50.
  • the printing station 8 also comprises means for moving the support 34 relative to the frame 24, vertically and in a horizontal plane of movement.
  • the means for moving the support 34 relative to the frame 24 in the vertical direction comprise two cylinders (not shown) mounted on the columns 32.
  • the means for moving the support 34 horizontally will be described later.
  • the machine 2 comprises a set of cameras and detectors 56 and a central unit 58 able to control the whole of the machine according to at least information provided by the cameras and the detectors 56.
  • the objects to be printed 6 are arranged one behind the other on the supply conveyor 4.
  • the bracket 30 grasps the object 6 disposed at the end of the conveyor 4 closest to the plate 26, and the transfer in the zone 28 closest to the conveyor 4.
  • the stem 31 grasps the object 6 that has just been printed at the printing station 22, and the transfer on the evacuation conveyor 10. This object is initially in the area 28 of the plate 26 closest to the conveyor 10.
  • the object 6 in the third zone 28, under the support 34 is printed.
  • the support 34 is first lowered so as to bring the screen 36 immediately. above object 6 to print. Then, with the help of the means for moving the support in the horizontal plane of deflection, the position of the screen 36 is precisely adjusted with respect to the object 6.
  • the cylinders 52 then move the squeegees 48 downwards, such that the squeegees mesh the mesh of the screen 36 against the object 6.
  • the carriage 50 then moves relative to the support 34, so that the squeegees 48 scan the mesh 36 while holding it pressed against the object 6, thus realizing on it the impression of the pattern defined by the mesh.
  • the doctor blades 48 are then raised by the jacks 52, and the carriage 50 returns to its initial position.
  • the support 34 is moved upwards relative to the plate 26.
  • the plate 26 is then rotated by 120 °, so as to bring the zone 28 carrying the newly printed object 6 close to the evacuation conveyor. This same movement brings the zone 28 carrying the newly deposited object 6 onto the plate 26 under the printing unit 22.
  • the means for moving the support 34 relative to the frame 24 comprise three coupling assemblies 60, 60 ', 60 "of the same type
  • the assemblies 60, 60', 60" each comprise a slide, respectively 62, 62 ', 62 " rigidly fixed respectively under the tabs 42, 42 ', 42 “of the support. They also each comprise a mobile carriage 64 guided by the slide 62, 62 ', 62 "in a direction fixed relative to the support 34, and parallel to the horizontal plane of travel. also motorized means 66 for moving the carriage 64 relative to the frame 24.
  • the displacement means 66 of each coupling assembly comprise a motor 68, a vertical output shaft 70 rotated by the motor 68, and a crank 72 fixed to the output shaft 70 (see FIG. figure 5 ).
  • the crank 72 comprises an eccentric rod 74, offset horizontally relative to the shaft 70 and extending vertically beyond this shaft by a section 76.
  • the section 76 is mounted on the carriage 64 by a ball joint.
  • the patella occupies substantially the center of the carriage 64.
  • the slides 60 and 60 'of the tabs 42 and 42' guide the carriages 64 in aligned directions.
  • the slide 60 "of the third subassembly guides the corresponding carriage in a direction perpendicular to that of the two other rails 60 and 60 '.
  • the three coupling subassemblies are distributed at the periphery of the support 34.
  • the movable members 64 of the three subassemblies are inscribed at each moment in a circle C materialized on the figure 3 , this circle C being defined as that which passes through the connecting ball joints of each of the carriages 64.
  • the center G of the circle C is at each moment located in the space 40.
  • the carriages 64 are arranged around the center G so as to separated from each other by angles between 90 ° and 150 °.
  • the motorized means 66 of the coupling assemblies 60 and 60 ' are arranged under the support 34, as shown in FIG. figure 2 . More specifically, they are interposed between the upper end of the columns 32 and the lower face of the tabs 42 and 42 '.
  • the motorized means 66 of the third coupling assembly 60 "are disposed above the support 34, as shown in FIG. figure 2 . They are fixed to a bracket not shown, fixed relative to the frame 24. This bracket is taken for example on the columns 32.
  • the tab 42 "is pierced at its center by a square hole 78.
  • the slides 62" of all 60 “are fixed under the tab 42", on either side of the orifice 78. They extend parallel to two opposite edges of the square orifice 78.
  • the carriage 64 is located immediately below the orifice 78.
  • the motor 68 is, meanwhile, located above the orifice 78, the crank 72 being engaged in the orifice.
  • the size of the orifice 78 is sufficient to allow the crank 72 to debate in rotation about the axis 70 of the engine.
  • the motors 68 of the three coupling assemblies 60, 60 ', 60 are micrometer motors controlled by the computer 58. They make it possible to obtain a very high precision for the positioning of the carriages 64.
  • the plate 26 then pivots about its axis Z, so as to bring the element 6 under the printing station 22.
  • the computer 58 according to the information received from the camera 56, will control the motors 68 of the three sets of coupling 60, 60 'and 60 ", so as to precisely adjust the position of the screen 36 in three degrees of freedom with respect to the element 6.
  • These three degrees of freedom are the translation of the screen 36 in the direction X corresponding to the direction of movement of the two carriages 64 aligned sets 60 and 60 ', the translation of the screen 36 in the direction Y corresponding to the direction the movement of the carriage of the third assembly 60 ", and a rotation of the screen 36 about an axis perpendicular to the horizontal plane of movement of the support.
  • the movements authorized by these three degrees of freedom allow to obtain all possible positions of the screen 36 with respect to the element 6 defined by the deflections of the carriages, conversely, there is only one possible combination of positions for the carriages 64 which makes it possible to obtain the desired position for the screen 36 by report to element 6 to print.
  • This combination of positions is determined by the computer 58, using mathematical equations stored in its memory, from the information provided by the camera 56.
  • the computer 58 controls the rotational movement of the cranks 72, via the motors 68.
  • the rotational movement of the crank 72 causes a translation of the carriage 64 corresponding in the X direction relative to the slideways 62, and also causes a displacement of the tab 42 along the Y axis.
  • the displacement of the crank 72 of the assembly 60 'causes the displacement of the corresponding carriage 64 in the direction X and the displacement of the corresponding tab 42' in the direction Y.
  • the movement of the crank 72 of the third together 60 "causes the displacement of the carriage 74 corresponding in the direction Y and the displacement of the corresponding tab 42" in the direction X.
  • the computer 58 activates the cylinders to lower the screen closer to the element 6 to print, and causes the displacement of the doctor blades.
  • the slides 62, 62 'and 62 are rigidly fixed on an upper face of the support 34, on the tabs 42, 42', 42". These slides guide the trolleys 64 in the same directions X and Y as in the first embodiment.
  • the motors 68 are arranged above the support 34, and are rigidly fixed to a fixed structure relative to the frame 24, this structure not being shown for clarity.
  • the motorized means for moving the carriage 64 of the assembly 60 are shown in greater detail on the Figures 7 and 8 . They comprise an intermediate carriage 80 disposed above the carriage 64, an endless screw 82 arranged in the extension of the drive shaft 70, a coupling 84 which rotatably secures the worm 82 and the shaft 70, a bearing 86 for guiding rotation of the screw 82, and a nut 88 rigidly fixed to the intermediate carriage 80.
  • the worm 82 is engaged in the threaded hole of the nut 88.
  • the motorized means 60 also comprise intermediate guides 90 for guiding of the intermediate carriage 80. These intermediate rails 90 and the bearing 86 are rigidly fixed to the support structure of the motors 68.
  • the slideways 90 guide the intermediate carriages 80 in the Y direction.
  • the motor shaft 70 and the worm 82 also extend in the Y direction.
  • the intermediate slideways 90 guide the intermediate carriage 80 in the direction X.
  • the output shaft 70 and the worm 82 therefore extend along the same direction X.
  • the computer 58 controls the rotational drive of the worm 82, through the motors 68, the intermediate carriages 80 thus being driven in translation.
  • the carriage 64 is articulated to the intermediate carriage 80 about an axis 92 extending perpendicularly to the two carriages.
  • This axis 92 is rigidly fixed to the center of the carriage 80 and is connected by a ball joint connection to the center of the carriage 64.
  • the printing machine described above has many advantages.
  • the means of displacement of the screen support 34 relative to the frame in its plane of movement are mechanically particularly simple.
  • the support is moved by three coupling assemblies comprising motorized carriages and sliding connection means between the carriages and the support. These three assemblies are controlled by a computer in a coordinated manner, which allows to freely adjust the position and the orientation of the screen printing with respect to the element to be printed, quickly and accurately.
  • the means for moving the support have a particularly small footprint.
  • the displacement motors of the carriages are small, and the means for driving the support (slides, carriage, means for driving the carriage by the motor) are compact, both in the first embodiment and in the second embodiment.
  • the machine described above can have multiple variants.
  • the three slides and the corresponding carriages can be arranged in the same plane.
  • the slides can also be arranged in planes parallel to the plane of movement, but different from each other.
  • the arrangement of the coupling assemblies at the periphery of the support is chosen so as to facilitate the guiding of the support by coordinated movement of the carriages. It is advantageous in this perspective to have one of the three sets along each branch of the support.
  • the carriages thus fit into a circle whose center G is located in the central space of the support, which makes the guidance of the support easier and more accurate. It should be noted that the movements of the carriages are of small magnitudes with regard to the size of the support, so that the center G of the circle remains at each moment in the central space.
  • two of the three carriages can be guided by the slides in aligned directions, the third carriage being guided in a direction perpendicular to the previous one.
  • This arrangement is particularly advantageous because the mathematical equations allowing the computer to determine the position sought for the screen and the trajectory for each carriage to reach this position are particularly simple.
  • the motorized means for moving the carriages may include other types of means for driving the carriage by the motor than those described above.
  • These drive means may be of the rack and pinion type or the pivoting lever type.
  • the three coupling assemblies can comprise different drive means, one of the coupling assemblies comprising for example means for driving the carriage by crank, and the other two by worm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
EP07290393A 2006-04-12 2007-04-02 Machine d'impression par sérigraphie Not-in-force EP1844931B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07290393T PL1844931T3 (pl) 2006-04-12 2007-04-02 Maszyna drukarska do sitodruku

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0603235A FR2899840B1 (fr) 2006-04-12 2006-04-12 Machine d'impression par serigraphie

Publications (2)

Publication Number Publication Date
EP1844931A1 EP1844931A1 (fr) 2007-10-17
EP1844931B1 true EP1844931B1 (fr) 2008-10-29

Family

ID=37311364

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07290393A Not-in-force EP1844931B1 (fr) 2006-04-12 2007-04-02 Machine d'impression par sérigraphie

Country Status (6)

Country Link
US (1) US7631597B2 (pl)
EP (1) EP1844931B1 (pl)
DE (1) DE602007000209D1 (pl)
ES (1) ES2316140T3 (pl)
FR (1) FR2899840B1 (pl)
PL (1) PL1844931T3 (pl)

Families Citing this family (18)

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Publication number Priority date Publication date Assignee Title
FR2932717B1 (fr) 2008-06-24 2011-03-25 Dubuit Mach Machine a imprimer.
FR2936975B1 (fr) * 2008-10-13 2011-06-03 Dubuit Mach Machine d'impression par serigraphie et procede d'impression associe
US8413578B2 (en) 2008-11-19 2013-04-09 Illinois Tool Works Inc. Modular printing system having vertically separated pass through conveyor system
IT1392992B1 (it) * 2009-02-23 2012-04-02 Applied Materials Inc Procedimento e apparecchiatura per la stampa serigrafica di uno schema a strato multiplo
IT1392991B1 (it) * 2009-02-23 2012-04-02 Applied Materials Inc Procedimento di stampa serigrafica autoregolantesi
IT1398433B1 (it) * 2009-09-03 2013-02-22 Applied Materials Inc Apparato e procedimento per la lavorazione di un substrato
CN101791898B (zh) * 2010-03-05 2012-06-27 中国电子科技集团公司第四十五研究所 太阳能电池片印刷网框对位调整装置
DE102011005158A1 (de) * 2011-03-04 2012-09-06 JRT Photovoltaics GmbH & Co. KG Siebdruckstation für flächige Substrate, insbesondere für Solarzellen
JP5189194B2 (ja) * 2011-09-05 2013-04-24 ミカドテクノス株式会社 真空加熱接合装置及び真空加熱接合方法
CN102431281B (zh) * 2011-09-23 2014-01-15 湖南红太阳光电科技有限公司 一种丝网印刷机定位夹持机构
CN107534065A (zh) * 2015-05-08 2018-01-02 应用材料意大利有限公司 针对太阳能电池产品在基板上作丝网印刷的方法、针对太阳能电池产品在基板上作丝网印刷所用的丝网及针对太阳能电池产品在基板上作丝网印刷的设备
DE102017201715B4 (de) * 2017-02-02 2022-08-18 Ekra Automatisierungssysteme Gmbh Druckvorrichtung
DE102018207336B4 (de) * 2018-05-09 2021-06-24 Asys Automatisierungssysteme Gmbh Bearbeitungsvorrichtung zum Bearbeiten von Substraten
CN112264246B (zh) * 2020-09-04 2022-01-18 航天科工空间工程发展有限公司 一种涂覆装置及涂覆方法
CN113211939A (zh) * 2021-04-15 2021-08-06 南通东川数码科技有限公司 一种全自动印花设备
EP4431302A1 (de) * 2023-03-11 2024-09-18 Exentis Knowledge GmbH Vorrichtung zur herstellung von dreidimensionalen siebdruckwerkstücken, sowie verfahren dazu
WO2024188676A1 (de) * 2023-03-11 2024-09-19 Exentis Knowledge Gmbh Vorrichtung zur herstellung von dreidimensionalen siebdruckwerkstücken, sowie verfahren dazu
WO2024188677A1 (de) * 2023-03-11 2024-09-19 Exentis Knowledge Gmbh Werkstückträger sowie vorrichtung zur herstellung von dreidimensionalen siebdruckwerkstücken

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US5619919A (en) * 1995-02-13 1997-04-15 Autoroll Machine Corporation Silk-screen print head for the printing of halftones on the surface of a substrate
JP3492491B2 (ja) * 1997-05-12 2004-02-03 Ｔｄｋ株式会社 スクリーン印刷マスク補正方法及び装置
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JP3504623B2 (ja) * 2001-03-12 2004-03-08 マイクロ・テック株式会社 スクリーン印刷装置及びスクリーン製版セット方法

Also Published As

Publication number Publication date
US7631597B2 (en) 2009-12-15
US20070240588A1 (en) 2007-10-18
PL1844931T3 (pl) 2009-04-30
FR2899840B1 (fr) 2008-07-04
FR2899840A1 (fr) 2007-10-19
ES2316140T3 (es) 2009-04-01
DE602007000209D1 (de) 2008-12-11
EP1844931A1 (fr) 2007-10-17

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