WO1991010567A1 - Racloir et dispositif de raclage a pression magnetique, particulierement avec cylindre perfore - Google Patents

Racloir et dispositif de raclage a pression magnetique, particulierement avec cylindre perfore Download PDF

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Publication number
WO1991010567A1
WO1991010567A1 PCT/AT1991/000010 AT9100010W WO9110567A1 WO 1991010567 A1 WO1991010567 A1 WO 1991010567A1 AT 9100010 W AT9100010 W AT 9100010W WO 9110567 A1 WO9110567 A1 WO 9110567A1
Authority
WO
WIPO (PCT)
Prior art keywords
squeegee
doctor blade
doctor
bar
magnetically
Prior art date
Application number
PCT/AT1991/000010
Other languages
German (de)
English (en)
Inventor
Johannes Zimmer
Original Assignee
Johannes Zimmer
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
Priority claimed from AT9290A external-priority patent/AT400115B/de
Priority claimed from AT18190A external-priority patent/AT393465B/de
Application filed by Johannes Zimmer filed Critical Johannes Zimmer
Priority to AT91902322T priority Critical patent/ATE104211T1/de
Priority to DE59101358T priority patent/DE59101358D1/de
Priority to BR919103971A priority patent/BR9103971A/pt
Priority to EP91902322A priority patent/EP0463142B1/fr
Publication of WO1991010567A1 publication Critical patent/WO1991010567A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/40—Inking units
    • B41F15/42—Inking units comprising squeegees or doctors
    • B41F15/426—Inking units comprising squeegees or doctors the squeegees or doctors being magnetically attracted

Definitions

  • Magnetically pressed squeegee and squeegee device especially with round stencil (screen cylinder)
  • Squeegee devices that work with magnetically effected squeegee contact pressure are known.
  • Doctor blade profiles which are either in one piece and made of magnetizable material or multi-part, i.e. several parts, of which at least one part can be magnetized, are also known: either as components of doctor devices or, as a special case, e.g. as a magnetizable round bar (magnetic roller doctor) which can be used alone as a doctor device.
  • such a doctor blade device which consists of a doctor blade profile strip or at most as a double doctor blade, consists of two such doctor blade profile strips and at their ends by means of journal in a roller guide, ie in a leadership role is deposited.
  • the available magnetic force acts exclusively or primarily as a doctor pressure and in a second furcation also determining the location. This position-determining effect function is derived from the magnetically effected main function - the doctor pressure - without this or Mer resulting in a reduction in the contact pressure.
  • doctor pressure is weakened by two factors, firstly, that the weight of the doctor blade profile largely rests on the side roller guides and secondly, that also generated by the magnetic device in the magnetizable parts of the doctor blade bar, magnetic force absorption acts only in part as a doctor pressure, while the other part, like the dead weight, acts on the lateral roller guide through the lateral journal bearings and thus as a doctor pressure, ie as an actual worker, the application process is lost.
  • a disadvantage or deficiency of the doctor blade application technique for some operating modes is that the application quantity is determined by the doctor blade diameter and changes in the opening Carrying capacity is therefore only possible by changing the roll diameter, ie replacing a doctor roll of diameter A with a doctor roll of diameter B and thus an operating or. Production interruption due.
  • Known prior art also includes such doctor blade devices with a profiled strip which is arranged in the region in front of the doctor blade and is fastened to the doctor blade device and which is either movable on its own, as an element or by the doctor blade device, i.e. is designed to be movable. its location in relation to the application zone is changeable.
  • auxiliary or additional devices of this type an additional quantity control can be effected within certain limits even during operation without interrupting the production.
  • the doctor device according to the invention differs - it can be a roller or a doctor blade direction - in an advantageous manner in that a roller or doctor blade or a profiled strip with a doctor or coating element is designed and arranged in this way is that the entire available, magnetically induced force is supplied to the squeegee in whole or at least approximately as a squeegee contact pressure and remains available as such that the position of the squeegee is determined by the position of the magnetic device as well as by the formal design and strength (intensity ) of the magnetic field is determined and that the squeegee has a freedom of movement which is limited or made possible by device parts or possibly by a template itself, within which the squeegee magnetically effects its optimal location for the respective operating state and possibly influenced by the working speed and by friction value and dynamic pressure parameters.
  • a further advantageous embodiment of this squeegee technology or device according to the invention is that this squeegee described above is even connected to the squeegee device is that the squeegee can be pivoted about a longitudinal axis of the squeegee, for example around the contact edge or contact curvature, without restricting its above-described positional determination possibility, whereby a change in the application quantity can be effected on the way via a change in the dynamic pressure in the application substance.
  • the parts of the device which cause this swiveling or axial rotation of the doctor blade strip can be designed such that the doctor blade strip also enables the mobility caused by changing the magnetic contact force, acting approximately vertically to the application plane, without magnetically induced forces in derive the device.
  • This property of the device according to the invention is particularly important and advantageous because the coating knife devices known according to the prior art, which are pressed by means of magnetic force, determine the position of the coating knife blades by mechanical means, so that the magnetic forces acting on the blade strip cause distortions, deformations and Can cause vibrations that interfere with the application process.
  • Squeegee moldings according to the invention both roller and Stxeichrakelleisten, have a profiled, angular or rounded, on the bearing surface or template on area and consist, at least in part of its longitudinal extension, of magnetizable material or, if appropriate, of magnetic devices.
  • the invention is also advantageous because of the opposite term, complementary combination of several features, of which the following are mentioned, for example:
  • the axis about which the squeegee can be pivoted in or on the squeegee device is a magnetic-imaginary constructional axis which is only produced by magnetic force effects.
  • the squeegee or squeegee device can be changed in terms of its location or its spatial arrangement with respect to the application area (to the squeegee contact zone) by means of different aids: vertical renting, horizontal displacement, inclined displacement, change in the location of a circular arc or, for example, rotation of the doctor device (this does not mean the rotation of the doctor profile strip) about a device axis, such as, for example, the axis of the substance feed pipe to which the support body of the doctor device is attached.
  • the control of the pivoting or axial rotation of the squeegee can also be done by a so-called link control or by a lever-joint connection: e.g. by means of a lever arm or a connecting link with a swivel joint at each end of the link or the lever-like connecting part.
  • the squeegee strip is designed as a roller squeegee strip
  • one and the same squeegee device can be equipped with differently shaped strips or with squeegee rollers of different diameters, wherein the strips themselves can also be shaped differently.
  • doctor blade profile strip is a doctor blade strip, this can also be shaped differently and can be equipped or shaped with differently designed or shaped doctor blade elements.
  • roller doctor blades which are important in terms of their use and are advantageous for the different operating requirements, are that the bar can be provided with a slide-bearing-shaped recess in which a doctor roller is held around about two thirds of its circumferential surface area, viewed in the direction of movement, before the roller located edge, which delimits this slide bearing-shaped recess, very close to the application plane or template. This distance can be reduced to 1 mm - and even less than this.
  • the squeegee roller inserted in the roller squeegee strip can advantageously be formed with a structured surface - preventing the formation of drip drops on the rear edge of the plain bearing, as seen in the direction of movement.
  • An additional benefit in terms of economical substance application can be brought about by holding the doctor roller, which is inserted in a roller doctor bar, securely in the bar, for example by means of pinning. This design option is based on the observation that a non-rotating, that is to say a doctor blade roller used as a round doctor blade, applies about a third less substance than a rotating roller of the same diameter, from which this additional, inventive measure was derived.
  • the magnetic force is used as a squeegee pressure force, occasionally also as a subordinate assistant for determining the position, but always in conjunction with mechanical means for determining the position.
  • the invention presented herewith for the first time treads the path of assigning a second main working function to the magnetic force in addition to the function of squeegee pressing; the magnetic force or the device generating the magnetic force is assigned alone, without the use of mechanical aids, the art function of the location fixation.
  • the axial position of a magnetically pressed squeegee with a roller squeegee or scraper bar is determined exclusively by magnetic force.
  • the device according to the invention is characterized in that this exclusively magnetically held doctor element is also assigned a further, preferably non-magnetizable or only partially magnetizable part, which, if the doctor element is a roller, about its axis or otherwise about its contact edge and is pivotable together with this.
  • the connecting parts constructed according to the invention which connect the magnetically held working parts to parts mechanically fastened or resting on the machine, have only the control fiction during the operating state for determining the angular position of the squeegee profile bar which can be pivoted around the squeegee element or together with it.
  • these connecting parts which control the angular position by sliding contact, are also assigned a holding function which does not act in the operating state but only outside the operating state.
  • This additional function of holding, which cannot or cannot be set in the operating state means that the entire application device - in which the substance supply is preferably also integrated - can be handled in one piece.
  • doctor roller 30 and in addition to the doctor roller 30 in Fig.4 magneti sizable parts 10 - are shown in the profile bar 2.
  • a strip-shaped squeegee or squeegee device is provided with a squeegee profile strip or squeegee merit retaining strip 2.
  • the doctor element 4 made of a pressure and bending elastic profile body is inserted into the doctor element holding recess 3.
  • the application substance 5 rests on the storage surface 6 of the profile bar 2 and on the storage surface 7 of the doctor element 4.
  • the storage surface 6 of the squeegee strip 2 is curved here.
  • the doctor blade 1 also carries a magnetizable mass 10, which can also be in several parts.
  • the squeegee strip 2 has an extension 15 which rests in the area 11 on the area 12 of a support part 13, the support part 13 being fixed laterally.
  • the profile strip 2 can move back and forth in the direction of the arrow 16, specifically in or against the direction of movement 18 of the application surface 9 or in or against the direction of movement 20 of a template 19.
  • FIG. 2 corresponds to that of FIG. 1, but here a support 51 of the squeegee strip 2 lies directly in the area 21 on the inner wall of the screen stencil 19.
  • FIG. 3 is derived from FIG. 2 and additionally has a boundary wall which is connected to the squeegee strip 2 and into which a flexible strip 28 is inserted, which abuts the screen cylinder 19 or the application surface 9. This creates a trough in the upper area and an application gap in the lower area.
  • FIG. 4 shows a device similar to FIG. 3, but in one piece, with a round rod as a doctor element, which can optionally be arranged in a rotating or rotationally fixed manner, with a similar contact area being provided symmetrically in addition to the contact area 21. This counteracts the risk of the device possibly tipping over to one of the two sides.
  • an application slot 50 is formed here between the doctor element 28 and the roller 30, through which the application substance 5 supplied by means of a passage 52 can exit onto the application surface 9.
  • FIG. 5 and 6 show different positions of a device according to the invention according to Fig.1, with different
  • the extension 15 is directed away from the screen template 19 and the adjacent areas are not shown. 8 shows a possibility of interaction between the extension 15 and the support part 13 again.
  • the support part 13 is designed here as a head 22 and can be moved in the direction of the arrow 23.
  • the support part 13 engages in a fixed counterpart 24 which is attached to a plate 25.
  • the squeegee strip 2 is in one piece with a profile edge 26 and there is the possibility of a magnetizable mass 27 with e.g. circular cross section to use if the squeegee 2 is made of non-magnetizable material.
  • doctor element 28 is thin and flexible.
  • the squeegee bar 2 carries a further profile bar 29 and a magnetizable mass 10, if neither the profile bar 29 nor the squeegee bar 2 are made of magnetizable material or, if appropriate, to increase the magnetically caused pressure .
  • the profile strip 29 is replaced by a roller 30 which is gripped in a slide-bearing-shaped recess 31 which encompasses half of it.
  • FIG. 13 A similar embodiment is also shown in FIG. 13.
  • the profile strip 2 rests on a roller 30 on the application surface 9 or on the inside of the stencil 19.
  • the squeegee strip 2 is shaped similarly to FIG.
  • FIG. 14 A further development is shown in FIG. 14, where the squeegee bar 2 is made of magnetizable material and the adjustment devices 37, 38 can be moved on a rod 39 or, as shown in broken lines, are connected to form a one-piece displacement device 40.
  • an auxiliary device 41 can be rotated about an axle pin 42 in the direction of arrow 43 and is held on a contact and control profile 45 via a web 44 which is guided in a guide 46 intervenes.
  • the possible swivel range of the squeegee results from the circular segment lines 47, 48, an approximation or overlapping range of the two intermeshing swivel movement or contact and control elements being provided.
  • the pivoting movement is derived from an actuating device 49 that is moved perpendicularly or approximately perpendicularly to the application plane, and the contact and control elements are designed essentially as in FIG.
  • FIG. 3 A variant is shown in broken lines in FIG. 3, in which the device is shaped such that the extension 15 engages in a guide 46, as in FIG. 16.
  • Application device around the contact edge of the doctor element can Width of the application slot 50 and thus also the application quantity output can be changed.
  • FIG.17 Another embodiment of the invention is shown in Fig.17.
  • a material web 9, onto which a substance is to be applied, is guided over a table 66, in which a magnet device 8 is contained.
  • a doctor blade profile strip 2 is provided, which is pivotally connected by means of a joint 65 to a shoulder, a holding arm, a plurality of holding arms or to a continuous strip 64.
  • On the web or on an associated template 19 there is an optionally magnetized doctor element which is magnetically connected to an optionally magnetizable part of the doctor bar, so that the magnet device 8 presses this doctor element onto the template or the product web.
  • the holding arm or the bar 64 is connected to an at least partially cylindrically shaped part of a support bar 60 which is rotatably mounted in a shell-shaped slide bearing 63.
  • the plain bearing is connected via an arm 61 to an actuating device which has a threaded rod 62 on which the centers 67 can be moved, i.e. when the nuts 67 are rotated, the bearing shell 63 is adjusted and thus the altitude and subsequently the angle of attack of the squeegee strip 2 are changed.
  • the squeegee can move into the position shown in dashed lines.
  • the doctor bar 2 and / or the doctor element, which is shown here as a round rod, consists at least partially of magnetizable material.
  • the magnetizable material can also have a different shape or the entire squeegee can also consist of magnetizable material.
  • a flexible doctor blade can be fastened and the magnetizable round rod can also not be rotatably fastened in a recess in the doctor bar, e.g. be glued in.
  • the entire, available, magnetically generated force is supplied to the squeegee in whole or at least approximately as a squeegee contact force and remains available as such that the position of the squeegee is determined by the position of the magnetic device and also by the formal Design and strength of the magnetic field is determined, and that the squeegee itself can influence its location depending on the working speed and possibly by the coefficient of friction and dynamic pressure parameters.
  • the magnetic force is not only used for pressing on and determining the location of a conventional doctor roller, but also determines the location of a doctor bar and keeps it in the operating position, ie with the magnet system switched on.
  • a squeegee which has a squeegee bar and a squeegee element, lies on its own and does the job of carrying out the work (Fig. 1), only held magnetically in place.
  • a squeegee In connection with circular stencils it is possible to design a squeegee in such a way that part of the squeegee is extended to the rear in the direction of movement and rests against the inner wall of the screen cylinder with a very low support weight (Fig. 2). It is also possible to shape the ledge profile in the direction away from the application surface from the inner wall of the screen cylinder or to provide it with at least one attachment part shaped in this direction, to which the above-described function of contact or contact is assigned, the contact counterpart being arbitrary inside or outside of the application area can be arranged (Fig. 7).
  • the squeegee according to the invention can also be adjustable (i.e. axially rotatable) in its angular position or can be supported with a
  • FIG. 8 Auxiliary device for adjustment are formed (Fig. 8).
  • the application quantity output can be controlled by different jam angle sizes (FIGS. 5 and 6).
  • the location can vary depending on the operating state (web or template peripheral speed, magnitude of the magnetic force, viscosity and amount of the substance to be applied and the angular position set).
  • web or template peripheral speed, magnitude of the magnetic force, viscosity and amount of the substance to be applied and the angular position set There will be the disadvantage of the occurrence of unpredictable and uncontrollable tensions inherent in the prior art for the different interaction of magnetic and mechanical position determining forces and their function-impairing and quality-impairing effects, such as e.g. Bending, non-uniform application results and wear and tear are avoided.
  • the following squeegee element variants are thus possible: a strip which simultaneously forms the squeegee element (FIG. 9), a thin, resiliently squeegee blade (FIG. 10), a pressure-resilient and resilient squeegee profile strip, which can be designed differently (FIGS.
  • a thin profile strip or a profile bar which can be hard or pressure-elastic (Fig.11), the cross section of the profile bar element can also be circular (Fig.12), the profile bar with a circular cross section can be more than 180 ° of its circumferential surface, held slidably and thus be designed as a rotating roller, the bar or parts thereof or also inserted into the bar or parts attached to it consist of magnetizable material.
  • the contact parts can execute a circular movement in such a way that the two circular pivoting areas form an interlocking overlapping area (FIG. 15).
  • the contact parts can also be designed and arranged in such a way that the rotary or pivoting movement is derived from an actuating movement running perpendicularly or approximately perpendicularly to the application plane (FIG. 16).
  • the handling of the doctor device according to the invention is carried out in practice so that the optimal location of the doctor blade 2 is determined by the magnetic force, ie that the doctor blade 2 is adjusted to the magnetic field, is adjusted to the optimal position for the magnetic field and then by means of a mechanical Auxiliary device, such as clamping, this angular position is fixed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Liquid Crystal (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

Racloir et dispositif de raclage servant à l'application de substances coulantes sur des substrats à forme plate, comportant une bande de raclage profilée (2) et un élément de raclage (4-28-30-29), un système magnétique (8) étant affecté à celui-ci (4-28-29-30), la disposition spatiale, la force et la puissance du champ magnétique générés par ce système (8) définissant la position du racloir (4-28-29-30) dont l'orientation est, de plus, réglée au moyen de cette position déterminée magnétiquement ainsi qu'au moyen d'éléments de montage, conférant ainsi au racloir (4-28-29-30) un espace de mobilité limité.
PCT/AT1991/000010 1990-01-17 1991-01-16 Racloir et dispositif de raclage a pression magnetique, particulierement avec cylindre perfore WO1991010567A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT91902322T ATE104211T1 (de) 1990-01-17 1991-01-16 Magnetisch angepresste rakel und rakelvorrichtung, insbesondere mit rundschablone (siebzylinder).
DE59101358T DE59101358D1 (de) 1990-01-17 1991-01-16 Magnetisch angepresste rakel und rakelvorrichtung, insbesondere mit rundschablone (siebzylinder).
BR919103971A BR9103971A (pt) 1990-01-17 1991-01-16 Nivelador e dispositivo nivelador magneticamente comprimidos,especialmente com molde redondo(clindro peneirador)
EP91902322A EP0463142B1 (fr) 1990-01-17 1991-01-16 Racloir et dispositif de raclage a pression magnetique, particulierement avec cylindre perfore

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ATA92/90 1990-01-17
AT9290A AT400115B (de) 1990-01-17 1990-01-17 Magnetisch angepresste rakel und rakelvorrichtung, insbesondere mit rundschablone (siebzylinder)
AT18190A AT393465B (de) 1990-01-26 1990-01-26 Durch eine magneteinrichtung mittels magnetkraft angepresste rakelvorrichtung mit einer rakelleiste
ATA181/90 1990-01-26

Publications (1)

Publication Number Publication Date
WO1991010567A1 true WO1991010567A1 (fr) 1991-07-25

Family

ID=25591420

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT1991/000010 WO1991010567A1 (fr) 1990-01-17 1991-01-16 Racloir et dispositif de raclage a pression magnetique, particulierement avec cylindre perfore

Country Status (7)

Country Link
EP (1) EP0463142B1 (fr)
JP (1) JPH04503644A (fr)
AT (1) ATE104211T1 (fr)
BR (1) BR9103971A (fr)
DE (1) DE59101358D1 (fr)
ES (1) ES2051119T3 (fr)
WO (1) WO1991010567A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112032U1 (fr) * 1991-09-23 1993-01-28 Zimmer, Johannes, Klagenfurt, Kaernten, At
DE102015205025A1 (de) 2014-03-26 2015-10-01 Koenig & Bauer Ag Verfahren zum Erzeugen der optimalen Anpresskraft einer Rakel an ein Drucksieb und eine hierfür geeignete Rotationssiebdruckmaschine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6233799B2 (ja) * 2013-09-13 2017-11-22 株式会社小森コーポレーション ロータリースクリーン印刷装置
CN115946437B (zh) * 2023-03-09 2023-05-23 礼德新能源江苏有限公司 一种光伏硅片印刷机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2450231A1 (de) * 1973-10-25 1975-04-30 Johannes Zimmer Rakelanordnung
US3921521A (en) * 1970-07-23 1975-11-25 Zimmer Peter Squeegee device
FR2364122A1 (fr) * 1976-09-14 1978-04-07 Zimmer Johannes Dispositif de raclage, destine en particulier aux machines a imprimer les films
EP0311728A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
EP0311743A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
AT389676B (de) * 1983-10-06 1990-01-10 Johannes Zimmer Rakelvorrichtung mit einer vorzugsweise magnetisch angepressten rakelrolle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921521A (en) * 1970-07-23 1975-11-25 Zimmer Peter Squeegee device
DE2450231A1 (de) * 1973-10-25 1975-04-30 Johannes Zimmer Rakelanordnung
FR2364122A1 (fr) * 1976-09-14 1978-04-07 Zimmer Johannes Dispositif de raclage, destine en particulier aux machines a imprimer les films
AT389676B (de) * 1983-10-06 1990-01-10 Johannes Zimmer Rakelvorrichtung mit einer vorzugsweise magnetisch angepressten rakelrolle
EP0311728A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
EP0311743A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
WO1989003259A1 (fr) * 1987-10-10 1989-04-20 Johannes Zimmer Dispositif activateur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112032U1 (fr) * 1991-09-23 1993-01-28 Zimmer, Johannes, Klagenfurt, Kaernten, At
DE102015205025A1 (de) 2014-03-26 2015-10-01 Koenig & Bauer Ag Verfahren zum Erzeugen der optimalen Anpresskraft einer Rakel an ein Drucksieb und eine hierfür geeignete Rotationssiebdruckmaschine
DE102015205025B4 (de) 2014-03-26 2022-09-01 Koenig & Bauer Ag Verfahren zum Erzeugen der optimalen Anpresskraft einer Rakel an ein Drucksieb und eine hierfür geeignete Rotationssiebdruckmaschine

Also Published As

Publication number Publication date
JPH04503644A (ja) 1992-07-02
DE59101358D1 (de) 1994-05-19
ATE104211T1 (de) 1994-04-15
ES2051119T3 (es) 1994-06-01
EP0463142B1 (fr) 1994-04-13
EP0463142A1 (fr) 1992-01-02
BR9103971A (pt) 1992-05-19

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