EP0294640B1 - Machine à imprimer au pochoir - Google Patents

Machine à imprimer au pochoir Download PDF

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Publication number
EP0294640B1
EP0294640B1 EP88108208A EP88108208A EP0294640B1 EP 0294640 B1 EP0294640 B1 EP 0294640B1 EP 88108208 A EP88108208 A EP 88108208A EP 88108208 A EP88108208 A EP 88108208A EP 0294640 B1 EP0294640 B1 EP 0294640B1
Authority
EP
European Patent Office
Prior art keywords
stencil
fact
screen printing
conformity
printing press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88108208A
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German (de)
English (en)
Other versions
EP0294640A3 (en
EP0294640A2 (fr
Inventor
Gerhard Klemm
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
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Publication of EP0294640A2 publication Critical patent/EP0294640A2/fr
Publication of EP0294640A3 publication Critical patent/EP0294640A3/de
Application granted granted Critical
Publication of EP0294640B1 publication Critical patent/EP0294640B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0831—Machines for printing webs
    • B41F15/0845—Machines for printing webs with flat screens
    • B41F15/0854—Machines for printing webs with flat screens with a stationary squeegee and a moving screen

Definitions

  • the invention relates to a screen printing machine, corresponding to the preamble of claim 1.
  • Screen printing machines of this type are known, for example, from US Pat. No. 3,229,627.
  • one or more flat screen printing stencils lie one behind the other, arranged horizontally, the web of material, or the like, via the respectively assigned counter-pressure rollers lying under the screen printing stencils. is performed and printed in the area of the screen printing stencils.
  • Another disadvantage is that an immediate control of the printing result of each printing station is not possible immediately after printing, since the continuing web is not accessible to the viewer's eye. This means that the possibility of correcting misprints is not immediately available.
  • a sheet-fed printing machine for screen printing is known from US Pat. No. 2,555,096, on which individually supplied sheets can be printed using the screen printing process.
  • the screen stencil is at an angle to the horizontal, because in its lower area there is a pool of ink, from which the squeegee is the fresh application ink or the like. get.
  • the template lies in its inclined position on an impression cylinder, which is provided with a sheet gripper. With this device, webs cannot be printed. The sheets are fed and removed individually, and the printing result can be checked at the same time.
  • the present invention is therefore based on the object on the one hand to reduce the space required for each printing station in terms of its overall length and on the other hand to provide a control option for the operating personnel, the device being able to be adapted to any space and work situation.
  • each of the ink application stations can be checked by the personnel is because there is an accessible free space underneath the template.
  • the freshly printed part of the web is accessible to the operating personnel for visual inspection because it is exposed. This applies in particular if the material web is guided over the impression cylinder, vertically or approximately vertically downwards.
  • the invention thus relates to an improvement in a screen or stencil printing machine in which a "color” i.e. Printing ink, colors, enamel, adhesives or the like is to be printed.
  • a "color” i.e. Printing ink, colors, enamel, adhesives or the like is to be printed.
  • thermoplastic materials which are solid at normal temperature and are used in the molten state; materials which are curable at normal temperature by application of heat should also be included.
  • thermoplastic or curable compositions can be used, for example, for relief printing and may contain metal parts, for example for printing computer and other machine switches.
  • foamed masses are also considered as application media, as well as any other Chemicals.
  • stencil should be used, from which the most varied types of “stencils” can be understood, be they designed as a sieve or e.g. as perforated foils or the like
  • the main idea is to work from role to role. If necessary, the device could also be used as a sheet-fed printing machine. When working from role to role, work should preferably be done discontinuously, e.g. according to DE-OS 2,943,894 in the drive also of the counter-pressure roller.
  • substrate for example cardboard, paper, nonwoven, nonwovens, plastics but also textiles of all kinds, woven, knitted, knitted, fastened or unfastened and the like. The like.
  • paper or paper-like material is taken from roll to roll.
  • Figures 1 to 3 show a schematic view, partly in section, a screen printing station, strong schematized. A number of such screen printing stations can be arranged one behind the other.
  • the position of the rail arrangement can be changed in the direction of the arrows A, whereby two opposite rails, which are preferably T-shaped, can be changed in their position about an axis 12.
  • the opposing rails change their position together.
  • the height of the axis 12 can be adjusted in accordance with the arrow directions B.
  • the template carriage 10 is provided with a drive 13, for example a drive gear 13 ', which is switchable in its direction of rotation.
  • a drive gear 13 ' which is switchable in its direction of rotation.
  • the position of the drive gear 13 ' can be changed, e.g. by moving the housing 13 ⁇ in the directions indicated by the arrow.
  • the drive gear 13 meshes in the illustrated embodiment in a rack 14 which is arranged below the template carriage 10.
  • the position of the template 1 in the template carriage 10 can be fixed as desired, for example by strips 15 and 16.
  • a squeegee 2 which can be of any design, is assigned to the template.
  • This squeegee preferably consists of a printing squeegee 20 and associated drag squeegee 21.
  • a movement linkage 23 not only makes it possible to lift off the squeegee 2 (in the direction of arrow C), but also the squeegees in relation to each other and in relation to the impression cylinder 3, parallel to the screen 1 'of the template 1 to move.
  • the position of the doctor blade 1 during the printing process will be such that exactly on the tangential contact line of the screen 1 'on the outer surface of the impression cylinder 3, the pressure doctor 20 is at the pressure stroke.
  • the ink feed 4 can still be seen in FIG. 1, the term “color”, as already stated at the beginning, not to be understood as restricting.
  • the ink supply 4 consists of a circulation pump 40 with an inlet hose 41 and a transport hose 42, the latter supplying the recirculated ink to the doctor unit.
  • a connection is in the template frame 1 ⁇ .
  • the tape feed or web feed is also shown only schematically.
  • the web runs over deflection rollers 50, 51 and feed roller 52.
  • a device for web center control 53 which can change its position about a vertical pivot point 53, carries guide rollers 54 and 54 '.
  • Such center control systems are previously known. They are used to feed the web 6 or the web of goods perfectly to the impression cylinder 3 and its suction segment 30 arranged inside the latter, specifically already aligned with the side repeat.
  • Via a tension sensor 61 consisting of three rollers and a control device 7, the material web, in terms of its position and tension, reaches the impression cylinder 3, overflows it and is then guided to the dryer and to the next station.
  • the vertical leg can be controlled from a step 93.
  • the upward leg of the web guide to the impression cylinder 3 and the downward leg of the The web of material from the counter-pressure roller 3 to the deflection roller 60 is preferably guided vertically and both legs are preferably parallel to one another.
  • the running directions E and F can also lie at an angle to one another.
  • the operator can view the downward leg F of the web guiding path on the print side and determine whether the ink application or the like has been carried out correctly, whether the side repeat and the longitudinal repeat are correct and the color areas are evenly printed, or the halftone dots appear exactly.
  • spray heads or the like can also be used which apply gloss effects or the like to the goods through the sieve or also by means of coarse stencils and the like.
  • the term "squeegee” should therefore not be interpreted restrictively.
  • FIG. 1 The beginning of the so-called printing phase is shown in FIG. In this position the squeegee is 20th shut down and the drag squeegee 21 is in the upper position.
  • the ink pool builds up linearly across the printing width and when the entire stencil carriage 10 is raised in the direction of arrow G, that is to say in the upward movement, the printing is carried out, while the impression cylinder 3 makes its discontinuous forward movement and the material web moves in the direction of the arrows E and F advanced.
  • the towing stroke in the so-called "advance phase" when the stencil carriage 10 moves in the direction of the arrow G '(FIG.
  • the back and forth controllable drive for the upward and downward movement of the stencil carriage 10 is carried out by changing the drive 13 and thus changing the rotational movement of the drive gear 13 '.
  • the length of the movement path is e.g. controllable by controlling the registration mark.
  • an ink pool is formed in front of the lowered doctor blade 20 and at the same time as the ink is pressed through the screen also runs this pool of paint through the inclined position of the screen downwards or has the tendency to run downwards, it comes to the circulating pump 40 via the inlet hose 41 and is placed anew via the transport hose 42 into the squeegee unit in front of the drag squeegee 21.
  • This results in a uniform mixing of the paint moreover, the paint on the sieve cannot age and, for example, when metal particles and the like are added, they cannot cause precipitation. This is only a given example of the advantages of such a circulation, which is made considerably easier with the inclined sieve due to the natural gravitational pull of the earth.
  • FIGS 3, 4 and 5 show details of the template storage.
  • FIG. 3 shows the parts 9 which are also indicated in FIG. 1 with the vertical supports 90 and the horizontal legs 91 in the lower region and the upper horizontal legs 92.
  • the axis 12 for the articulation of the rails 11 is also located here 3 shows how the drives 13 for the drive gears 13 'shown in Figures 1 and 2' are interconnected by an axis 13a.
  • the gears 13 ' engage in the right and left under the template carriage 10 arranged racks 14, whereby the entire stencil carriage 10 can be moved up and down.
  • Figure 5 shows a top view of a template frame corner with an arrangement of a bar 16 at the template end for holding the same.
  • FIG 6 an embodiment is shown with two printing stations which can also be simple job stations, if e.g. the screen is not patterned, or if spray heads or the like are used instead of doctor units 2, e.g. also through rough stencils.
  • the web 6 is guided in both stations, as already described in connection with FIGS. 1 and 2, and runs in the indicated arrow directions over the preferably discontinuously driven counter-pressure rollers 3, which according to DT-PS 29 43 894 or according to DT-PS 28 57 766 can be formed.
  • the counter-pressure rollers provided with a suction segment run synchronously with one another. What is decisive, however, in the present case, is the inclined position of the sieves and the freedom to change this inclined position in the so-called "inclined stations.”
  • the dryer 8 can be designed in any way. Shown in the exemplary embodiment shown is a double dryer which, on the one hand, consists of a contact dryer plate 80, which is on the rear side of the web guide path and to which a blower dryer 81 is assigned on the opposite side, that is to say on the order side. Of course, this blower dryer does not touch the surface of the web.
  • the material web is returned to the inlet into the dryer, continued in a U-shape and then comes under step 93, which can also be arranged here and from which leg F of the downward material web can be observed.
  • step 93 can also be arranged here and from which leg F of the downward material web can be observed.
  • the web runs around a roller 56 and then gets into a web center control 53, which can consist of any device, known type.
  • This web center control 53 can consist of a pivotable part, which adjusts the web precisely to the side repeat.
  • the web Before entering the next station, the web again comes into a tension transmitter 61 consisting of three rollers and then wraps around the impression cylinder 3 at any angle, preferably running through 180 °.
  • the second station and all downstream stations can also have a dryer 8 as an assignment.
  • this dryer 8 can be formed in two parts, consisting on the one hand of a plate-like contact dryer 80 which rests on the back of the web and a blower part 81 which is again contactless to the web.
  • the transition again passes under step 93.
  • the web can enter other screen printing or order stations.
  • FIG. 7 shows the top view of a template, instead of a template carriage, which carries two rails 10a directly attached to it with grooves 10b, in each of which the running part of a rail 11 can engage according to the embodiment in FIG.
  • the stencil frame 1 ⁇ has in its lower part an angularly guided frame strip 1a, the inner walls of which are interrupted in the angular range in order to allow the ink to flow in the indicated arrow directions.
  • These inner walls 1b thus allow the ink or liquor coming from the screen, which is advanced during the printing process, to flow to a tube extension 16, to which the inlet hose 41 is connected, which leads to the circulation pump 40 led.
  • the paint, liquor, the foam or another chemical is placed in front of the drag squeegee 21, which is assigned to the pressure squeegee 20, through the transport hose 42 (see FIG. 8).
  • the angular range of the frame strip 1a can be covered towards the top, but can also be open, for example for cleaning purposes, especially since paint or liquor will only be in the lower range and there is no risk of splashing up. It is important that inflow ramps are created by the inner walls 1b of the lower frame strip 1a, which are at an obtuse angle to one another, which guide the paint or liquor in the direction of the tube extension 16 or the inlet hose 41. When the sieve is inclined and thus of course the template frame 1 ⁇ , the frame strip 1a is always below.
  • the angle alpha of the template position shown in FIG. 1 in relation to the horizontal of approximately 43 ° can be changed from, for example, 5 ° to 85 °. The most favorable angle will be around 60 ° or in the range of 20 ° to 70 °.
  • the position of the squeegee 2 is also changed depending on the angular position of the template 1 to the horizontal and adapted accordingly such that the squeegee 20 is preferably at right angles to the tangential screen 1 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (12)

  1. Machine sérigraphique servant à imprimer une nappe de tissu et comprenant au moins un poste d'enduction composé
    - d'un gabarit auquel un mécanisme d'entraînement fait décrire un mouvement de va-et-vient,
    - d'un mécanisme réglable à rateau,
    - d'un rouleau antagoniste en poste fixe respectivement d'un cylindre antagoniste,
    caractérisé en ce que le gabarit (1) respectivement le chariot du gabarit reposent chacun sur des paliers leur permettant de monter et descendre en position de travail selon un angle (alpha) par rapport à l'horizontale et en ce que l'angle de guidage (alpha) du gabarit (1) et de son chariot (10) est réglable.
  2. Machine sérigraphique selon revendication 1, caractérisée en ce que l'angle de guidage (alpha) du gabarit (1) est réglable dans une plage comprise entre 5 et 85 degrés.
  3. Machine sérigraphique selon revendication 1, caractérisée en ce que l'angle de guidage (alpha) en position de travail est compris entre 20 et 70 degrés.
  4. Machine sérigraphique selon revendication 1, caractérisée en ce que la position de début et de départ de la course d'impression se situe dans la zone supérieure du gabarit (1) et que le mécanisme à rateau est conçu réglable par rapport au rouleau de pression antagoniste (3) ou assimilé.
  5. Machine sérigraphique selon revendication 1, caractérisée en ce que si plusieurs gabarits (1) sont dispossés les uns derrière les autres, les plans de guidage (E, F) des nappes de tissu sont parallèles ou essentiellement parallèles entre eux et que les rouleaux de pression antagoniste et les cylindres de pression antagoniste (3) les enferment entre eux.
  6. Machine sérigraphique selon l'une ou plusieurs des revendications 1 à 5, caractérisée en ce que le gabarit (1) respectivement le chariot à gabarit (10) repose sur des rails (11) disposés basculants contre un châssis (90, 91, 92).
  7. Machine sérigraphique selon l'une ou plusieurs des revendications 1 à 6, caractérisée en ce que le gabarit (1) respectivement le chariot à gabarit (10) présente un mécanisme d'entraînement et qu'en particulier il est doté contre sa face inférieure de crémaillères (14) reliées par un mécanisme à engrenages (13) dont la position est réglable.
  8. Machine sérigraphique, en particulier selon l'une ou plusieurs des revendications 1 à 7, caractérisée en ce que le cadre de gabarit (1') respectivement le mécanisme à rateau (2) sont reliés à un dispositif à pompe à encre comprenant un flexible d'arrivée (41), une pompe de circulation (40) et un flexible de transport (42), le flexible d'arrivée (41) de la pompe (40) étant placé en bout de gabarit et le flexible de transport d'encre ou assimilée aboutissant dans le mécanisme à rateau.
  9. Machine sérigraphique selon l'une ou plusieurs des revendications 1 à 7, caractérisée en ce que la partie inférieure du cadre de gabarit (1'') présente un listel (1a) dont les parois intérieures sont interrompues dans une zone angulaire inférieure et qu'un ajutage (16) est affecté à la zone angulaire du cadre de gabarit (11'') pour y (16) raccorder un flexible d'amenée ou assimilé à une pompe de recirculation (40) du fluide à enduire.
  10. Machine sérigraphique selon l'une ou plusieurs des revendications 1 à 9, caractérisée en ce que la pompe de recirculation (40) est reliée au mécanisme à rateau (2) via un flexible de transport (42) dont l'extrémité se termine en amont du rateau remorqueur (21).
  11. Machine sérigraphique selon l'une ou plusieurs des revendications 1 à 10, caractérisée en ce que le guide de nappe de tissu entre deux postes d'enduction se compose respectivement d'un guide de centrage de nappe (53), d'un générateur de tension (61) et d'un dispositif de contrôle (7) ainsi que d'un cylindre de pression antagoniste (3) équipé d'un segment d'aspiration (30).
  12. Machine sérigraphique en particulier selon l'une ou plusieurs des revendications 1 à 11, caractérisée en ce qu'en-dessous du gabarit (1) respectivement du chariot à gabarit (10) un séchoir (8) est affecté à l'itinéraire de guidage de la nappe de tissu, le séchoir (8) ayant de préférence la forme d'un séchoir double et se composant d'une plaque de contact (80) et d'une soufflerie (81).
EP88108208A 1987-06-06 1988-05-21 Machine à imprimer au pochoir Expired - Lifetime EP0294640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3719059A DE3719059C2 (de) 1987-06-06 1987-06-06 Siebdruckmaschine zum Bedrucken einer Warenbahn
DE3719059 1987-06-06

Publications (3)

Publication Number Publication Date
EP0294640A2 EP0294640A2 (fr) 1988-12-14
EP0294640A3 EP0294640A3 (en) 1990-01-17
EP0294640B1 true EP0294640B1 (fr) 1993-12-08

Family

ID=6329239

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108208A Expired - Lifetime EP0294640B1 (fr) 1987-06-06 1988-05-21 Machine à imprimer au pochoir

Country Status (4)

Country Link
US (1) US4998470A (fr)
EP (1) EP0294640B1 (fr)
DE (2) DE3719059C2 (fr)
SU (1) SU1762744A3 (fr)

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
SE468504B (sv) * 1990-04-25 1993-02-01 Svecia Screen Printing Systems Stenciltryckmaskin med ett tryckbord och med kompensation foer moensterfoervraengning
IT1246734B (it) * 1990-12-24 1994-11-26 Ms Servizi Informatici Apparecchiatura elettronica per l'incisione mediante raggio laser di quadri da stampa serigrafica e simili.
US5375516A (en) * 1992-07-16 1994-12-27 Riso Kagaku Corporation Stencil printing device having a plurality of printing drums arranged on an incline
US5611274A (en) * 1993-05-19 1997-03-18 Tani Denkikogyo Co., Ltd. Apparatus for screen printing of viscous materials
CH686499A5 (de) * 1994-04-25 1996-04-15 Sutter Apparatebau Ag Siebdruckverfahren, sowie Flach-Siebdruckmaschine zur Ausuebung des Verfahrens.
US5553536A (en) * 1994-10-03 1996-09-10 Van Os Enterprises Screen printing apparatus with vacuum conveyor belt
JPH10114135A (ja) * 1996-10-12 1998-05-06 Riso Kagaku Corp 減圧式孔版印刷方法及び装置
IT1294648B1 (it) * 1997-09-05 1999-04-12 Ianua Spa Macchina per serigrafia con dispositivo perfezionato di aspirazione di inchiostro in eccesso.
DE19940073B4 (de) * 1999-08-24 2012-04-12 Jürgen Fromm Siebdruckverfahren, ein Rakelsystem, insbesondere für ein solches Siebdruckverfahren, sowie ein Siebdruckgerät, insbesondere zur Durchführung solch eines Verfahrens
DE10134132A1 (de) * 2001-07-13 2003-01-30 Siemens Ag Vorrichtung und Verfahren zum kontinuierlichen Drucken von organischen Leuchtdioden
CN105500902B (zh) * 2016-02-02 2017-04-26 张永胜 一种倾斜旋转送料的丝网印刷机

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Also Published As

Publication number Publication date
DE3719059A1 (de) 1988-12-22
DE3886100D1 (de) 1994-01-20
EP0294640A3 (en) 1990-01-17
US4998470A (en) 1991-03-12
SU1762744A3 (ru) 1992-09-15
DE3719059C2 (de) 1994-02-24
EP0294640A2 (fr) 1988-12-14

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