EP0530349B1 - Doctor blade device - Google Patents
Doctor blade device Download PDFInfo
- Publication number
- EP0530349B1 EP0530349B1 EP92908382A EP92908382A EP0530349B1 EP 0530349 B1 EP0530349 B1 EP 0530349B1 EP 92908382 A EP92908382 A EP 92908382A EP 92908382 A EP92908382 A EP 92908382A EP 0530349 B1 EP0530349 B1 EP 0530349B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- doctor
- strip
- holding
- pressing strip
- operating element
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/10—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the liquid or other fluent material being supplied from inside the roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
- B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
- B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
- B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
- B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
Definitions
- doctor device for various uses, such as e.g. coating application or removal of substances on / from flat surfaces, e.g. Material webs, transport lines, conveyor belts or rollers and / or for cleaning and / or drying smooth, rough or grained surfaces such as e.g.
- squeegee which consists of at least one preferably one-piece squeegee holding and pressure bar, a squeegee bar, a part designed as a working element or a part inserted into the squeegee bar at a contact point, including at least one between the two bars Doctor blade and pressure bar and the doctor bar or the working element - arranged elastic element presses against at least one work surface, for example can be a template or a screen cylinder.
- doctor blade work parts are attached to doctor blade holding parts and that these doctor blade holding parts are attached to the respective doctor blade working machine attached and in any case held so that the forces required for squeegee pressure are introduced via these holding parts and transferred to the squeegee working part.
- Squeegee devices or application devices which rest loosely movably on the application surface, including those which are loaded with gravity or weight or with mechanical means, and especially those which are pressed magnetically.
- Squeegees that are loose or attached to holders that are magnetically pressed are known in numerous variants, primarily those squeegees, especially all squeegees that are made of magnetizable material, but also those that are connected to parts made of magnetizable material and thereby pressed or additionally pressed thereby are known.
- a general disadvantage inherent in magnetic squeegee technology is that each magnetizable material can only be magnetized up to a certain degree of saturation and that in practice considerable distances between the pole faces of the magnetic device and the squeegees or parts of squeegee devices to be magnetized increase are bridged. Since these two disadvantages have an additive effect, the designer and the user of such devices often reach the limits of the possible applications. In practical terms, this means that with magnetic doctor devices, in particular magnetic roller doctor blades of small diameter, it is not possible to achieve sufficiently high contact forces, so that their application, which would often be very necessary, has to be avoided.
- the object of the invention thus presented is to eliminate the above-described disadvantages inherent in the prior art and to provide a versatile doctor blade or doctor blade device which works with great precision but is nevertheless very simple in construction and is easy to handle.
- the squeegee or squeegee device consists of a squeegee holding and pressure bar and a squeegee bar which is formed or is a working element at the squeegee contact point and which is movable along its entire length in the vertical or approximately vertical direction to the work surface, touching the surface and preferably more as encompassing or engaging half of the cross-sectional circumference of the squeegee strip / the working element; into the groove-shaped recess of the squeegee holding and pressure bar, which makes this plug / slide connection possible, is in the area transmitting the squeegee pressure force between these two bars, extending over their longitudinal extent, a pressure-elastic, the pressure force equalizing and / or if necessary generating element, applied to both of them and, if necessary, also enclosing the squeegee in a U-shape and thus also touching the two side surfaces.
- FIGS. 2 to 17 The squeegees and squeegee devices constructed in accordance with the invention and shown in FIGS. 2 to 17 were preceded by FIG. 1 taken from the prior art, which illustrates one of the efforts made up to now to increase the contact pressure of a magnetically pressed doctor roller relatively small in diameter: that of the The second roll placed on the work roll is intended to increase the contact pressure of the work roll; the holder required for this is designed as a second function as a height-adjustable stowage profile strip.
- FIG. 2 shows an illustration of the essential facts of the invention or construction features of a doctor device 1 constructed according to the invention in an abstract representation: a doctor holder and pressure bar 2 with a U-shaped cross section, which is formed by a groove-shaped recess 3, with a groove-shaped recess 3 in this inserted pressure-elastic element 5, which is formed in this embodiment according to Figure 2 as a further profile strip with a U-shaped cross section and for the purpose of increasing the pressure elasticity may have incorporated a cavity 56.
- the doctor profile strip or the actual doctor element 4 is in contact. This doctor element 4 is also held in the groove-shaped recess 33 of the elastic profile element 5.
- the squeegee and pressure bar 2 is held between sliding elements 6 so that it can be moved.
- the squeegee strip 4 touches in the work area an optionally flat or curved or rounded work surface 7 or material web 72 (work table or magnetic work table 71, counter roller, magnetic roller with magnet 71) resting thereon, which is not shown separately in the drawing.
- the doctor pressure is - abstracted by a strong arrow 203 - caused either by mechanical means (not shown) or by magnetic attraction, for which it is provided according to the invention to manufacture the doctor and pressure bar 2 (at least partially) from magnetic material. According to the invention, it is also provided that several types of doctor pressure generation can be combined with one another.
- the elements generating the magnetic force can be connected to the doctor blade holding and pressure bar 2 and that in this case the work table or the work roll consists of magnetizable material.
- the small double arrow inserted in the arrow 203 representing the contact pressure indicates the sliding mobility of the strips or the elements 2 and 4 in the direction of the vertical axis on the work surface or their relative displaceability relative to one another, which is one of the essential features of the invention.
- the other figures show pressure-elastic bodies in different design variants, which, however, do not touch the doctor element 4 on three surfaces as shown in FIG. 2 but only touch the side or surface of the doctor strip 4 opposite the doctor contact area which the squeegee pressure is introduced into the squeegee.
- the squeegee element which is a roller in some exemplary embodiments, is movable in the recess 3 of the squeegee holding and pressure bar held, which can also be held pivotably.
- FIG. 3 to 5 show three further exemplary embodiments of doctor devices 1 constructed according to the invention and their essential structural parts.
- Fig. 3 the squeegee and pressure bar 2 with e.g. hydraulically operated aids, which are fixed in place, pressed.
- the bar 2 In the bar 2 there is a groove-shaped recess 3 into which the squeegee bar 4 is inserted.
- a pressure-elastic element 5 which is designed as a hollow body, is inserted into the groove-shaped recess 3.
- the strip 2 is slidably held by two strips 6, which are fixed in place.
- the working element 41 is rounded and lies against the working surface 7.
- the strips 6 are U-shaped as a holding body.
- the squeegee strip 44 has a slide-bearing-shaped recess into which a working element 43 is inserted so as to be rotatable or rotationally fixed.
- the work surface is designed as a magnetic table 71 on which a web 72 and a template 73 lie.
- FIG. 5 corresponds to a combination of FIGS. 3 and 4, it being shown in dashed lines that the bar 2, if a large doctor pressure force is required, for which the magnetizable mass of the bar 2 is too low, depending on Requirement enlarged as a bar 21 can be formed.
- the intermediate bar 42 is drawn in broken lines because such a bar could be omitted in the particular exemplary embodiment of FIG. 5 if the working element 43 is used in a rotationally fixed design.
- Fig. 6 corresponds essentially to Fig. 3, differently to the working element 45 is formed at an acute angle and the doctor pressure is caused by the weight of the bar 2 and additional weights 22, which are only shown symbolically. Instead of one element 5, two elements 51 and 52 having the same function are used.
- a support beam 61 e.g. with screw connections 62, fixed in place, similar to that shown in FIG. 4.
- a magnetic force or a pressure force generated by means of a liquid or gaseous medium
- the vertical sliding ability of the bar 2 is only effective when the magnetic force is switched on.
- the combination of two different contact forces can bring about a correspondingly greater total contact force by adding together.
- a basic setting of the contact pressure is carried out, which is correctly dimensioned for the slowest possible working speed and can then, with the second contact force component, increase the contact pressure required when the speed increases, e.g. can be carried out automatically by electronic control - the contact pressure can also be reduced if the speed is reduced.
- a bar 23 is held on a joint 124 so as to be capable of rotating torsion, an elastic doctor blade 47 is inserted into the bar 46.
- the bar 24 is circular cylindrical over its entire length, but it would suffice if only those places were circular cylindrical or rounded where the sliding holding parts 64 abut.
- the bar 4 is formed with an acute-angled working element 45, the recess 3 is arranged asymmetrically in the bar 24 and is provided in the opening area with projections 31 which prevent the bar 4 from undesirably sliding out when the bar 24 is lifted off.
- An arm 25 is fastened to the bar 24, by means of which the pivoting mobility is limited by means of adjustable stops 26.
- Fig. 10 is similar to the embodiment of Fig. 9, but is torn off Drawn arm 27 part of an auxiliary device, on which the bar 24 is rotatably fixed - possibly vertically movable, possibly oscillating - is held.
- a flexible and pressure-elastic working element 47 is inserted into the strip 46, the bending of which results from the movement of the template 73 in the direction of the arrow 74 and from the magnetic squeegee pressure.
- a stowage profile bar 28, which can be pivoted and rotated about this bar, is plugged onto the bar 24, the pivoting movement of this bar 28 is actuated by a swivel device 29.
- FIG. 11 shows a bar 2 with extension bars 201, by means of which the bar 2 is held on threaded spindles 202 in such a way that the bar 2 can be moved in height or its distance from the working surface 72 can be adjusted.
- the strip 2 is pressed against a pressure-elastic element 53, which is not solid, but solid. Changing the distance of the bar 2 changes the contact pressure.
- FIGS. 12 to 14 show construction examples of doctor devices according to the invention, each using more than one doctor blade or doctor bar, which can be referred to with the generic term splitting doctor blades: between two doctor blades - which could also be called sealing strips in this type of function - there is a gap or trough-shaped substance space 75 is formed, into which the substance is fed through a gap 76 and optionally through bores 77 from either a trough space 78 or from a closed cavity 79. The supply in this cavity takes place through an opening 80.
- the trough space 78 is shown in Fig. 12 by e.g. two square tubes 81 and 82 are formed, which are attached to the comb-shaped bar 2 and on end plates 83 sealingly.
- the trough space is formed by a trough wall 84 and by the working surface 7 and by the end plates 83.
- a bar 2a is also present in FIG Trough wall 84 is attached and a bar 4a sealingly presses against the surface 7.
- the contact pressure is introduced magnetically and / or, for example, pneumatically or hydraulically through the element 5, for which a counter-support shown in broken lines is required as an auxiliary device.
- a double squeegee strip 48 with two elements 54, 55 is inserted into the recess in the strip 2.
- the substance is supplied through a hollow body 85.
- FIG. 16 shows an exemplary embodiment in which the bar 4 is U-shaped in addition to the embodiment variants shown in other figures, as a result of which four times the sliding surface is in contact with the bar 2, the doctor blade contact is effected magnetically and / or mechanically, e.g. with hydraulic auxiliary devices drawn in dashed lines, the same situation also applies to FIG. 12.
- a device in the construction corresponding to Fig. 16 and similar to the functions shown in Figs. 12 to 15 is turned through 180 °, i.e. working from bottom to top.
- the squeegee strip 4 is designed as a hollow body 49, which has a working element 45 shaped at an acute angle and a working element 43 with a circular cross section.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating Apparatus (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Polarising Elements (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Eye Examination Apparatus (AREA)
- Screen Printers (AREA)
Abstract
Description
Gegenstand dieser hiermit vorgestellten Erfindung ist eine Rakelvorrichtung für verschiedenartige Verwendungen, wie z.B. beschichtendes Auftragen oder Abnehmen von Substanzen auf/von ebene(n) Flächen, wie z.B. Warenbahnen, Transportbahnen, Transportbänder(n) oder Walzen und/oder zum Reinigen und/oder zum Trocknen von glatten, rauhen oder genarbten Flächen wie z.B. Warenbahnen, Transportbändern oder Walzen, mit mindestens einer Rakel, die aus mindestens einer vorzugsweise einteiligen Rakelhalte- und Anpreßleiste besteht, die eine Rakelleiste ein als Arbeitselement ausgebildetes Teil oder ein in die Rakelleiste eingesetztes Teil an einer Anliegestelle unter Einbeziehung mindestens eines zwischen beiden Leisten - der Rakelhalte- und Anpreßleiste und der Rakelleiste bzw. dem Arbeitselement - angeordneten elastischen Elements gegen mindestens eine Arbeitsfläche preßt, die z.B. eine Schablone oder ein Siebzylinder sein kann.The subject matter of the invention presented herewith is a doctor device for various uses, such as e.g. coating application or removal of substances on / from flat surfaces, e.g. Material webs, transport lines, conveyor belts or rollers and / or for cleaning and / or drying smooth, rough or grained surfaces such as e.g. Goods webs, conveyor belts or rollers, with at least one squeegee, which consists of at least one preferably one-piece squeegee holding and pressure bar, a squeegee bar, a part designed as a working element or a part inserted into the squeegee bar at a contact point, including at least one between the two bars Doctor blade and pressure bar and the doctor bar or the working element - arranged elastic element presses against at least one work surface, for example can be a template or a screen cylinder.
Rakeln und Rakelvorrichtungen, die so vielseitig für so unterschiedliche Zwecke angewendet werden können, sind bisher kaum bekannt geworden, fast alle der bisher bekannten Rakeln und Rakelvorrichtungen sind vorzugsweise für spezielle Anwendungszwecke geeignet. Die hiermit zur Vorstellung gelangende Erfindung bietet deshalb so umfangreiche und vielseitige Anwendungsmöglichkeiten, weil dieser Erfindung neu gewonnene Erkenntnisse zugrundeliegen, die für das Konstruieren von Rakeln und Rakelvorrichtungen einen ganz neuen Weg eröffnen.Squeegees and squeegee devices that can be used in so many different ways for such different purposes have hitherto hardly become known, almost all of the squeegees and squeegee devices known hitherto are preferably suitable for special applications. The invention presented here is therefore so extensive and versatile in its possible applications because this invention is based on newly gained knowledge which opens up a completely new path for the construction of doctor blades and doctor blade devices.
Die meisten der bisher bekannten Konstruktionen sind dadurch gekennzeichnet, daß die Rakelarbeitsteile an Rakelhalteteilen befestigt sind und daß diese Rakelhalteteile an der jeweiligen Rakelarbeitsmaschine befestigt und jedenfalls so gehalten sind, daß die zur Rakelanpressung erforderlichen Kräfte über diese Halteteile eingeleitet und auf den Rakelarbeitsteil übertragen werden.Most of the previously known constructions are characterized in that the doctor blade work parts are attached to doctor blade holding parts and that these doctor blade holding parts are attached to the respective doctor blade working machine attached and in any case held so that the forces required for squeegee pressure are introduced via these holding parts and transferred to the squeegee working part.
Es sind auch solche Rakelgeräte bzw. Auftragungsgeräte bekannt, die lose beweglich an der Auftragungsfläche anliegen, darunter solche, die mit Schwerkraft oder gewichtskraftbelastet oder mit mechanichen Hifsmitteln angepreßt werden und vor allem solche, die magnetisch angepreßt werden. Lose oder an Halterungen befestigt eingelegte Rakeln, die magnetisch angepreßt werden, sind in zahlreichen Varianten bekannt, und zwar vorwiegend solche Rakeln, vor alle Rollrakeln, die aus magnetisierbarem Material bestehen, aber auch solche, die mit Teilen aus magnetisierbarem Material verbunden sind und dadurch angepreßt oder zusätzlich dadurch angepreßt werden, sind bekannt.Squeegee devices or application devices are also known which rest loosely movably on the application surface, including those which are loaded with gravity or weight or with mechanical means, and especially those which are pressed magnetically. Squeegees that are loose or attached to holders that are magnetically pressed are known in numerous variants, primarily those squeegees, especially all squeegees that are made of magnetizable material, but also those that are connected to parts made of magnetizable material and thereby pressed or additionally pressed thereby are known.
Ein der Magnetrakeltechnik anhaftender, ganz allgemeiner Nachteil ist, daß jedes magnetisierbare Material nur bis zum Erreichen eines bestimmten Sättigungsgrades magnetisiert werden kann und daß in der Praxis, zwischen den Polflächen der Magneteinrichtung und den zu magnetisierenden Rakeln bzw. magnetisierbaren Teilen von Rakelvorrichtungen, erhebliche Distanzen zu überbrücken sind. Da diese beiden Nachteile addierend wirken, stößt der Konstrukteur und der Anwender solcher Einrichtungen oft an die Grenzen der Anwendungsmöglichkeit. Praktisch gesprochen bedeutet dies, daß mit Magnetrakeleinrichtungen, insbesondere Magnetrollrakeln kleiner Durchmesser, keine ausreichend hohen Anpreßkräfte erzielt werden können, so daß auf deren Anwendung, die oft sehr erforderlich wäre, verzichtet werden muß. Will der Anwender, anstatt einer magnetisch angepreßten Rollrakel kleinen Durchmessers, eine magnetisch angepreßte Streichrakel einsetzen, so bietet sich zwar die Möglichkeit an, ein solches Rakelelement nur im Anliegebereich mit einer sehr kleinen Rundung zu versehen und in dem von der Auftragungsebene entfernten Bereich zu verbreitern und auch seine Höhe so groß zu dimensionieren, daß der Querschnitt, bzw. die Größe der magnetisierbaren Masse, je nach Erfordernis dimensioniert werden kann.A general disadvantage inherent in magnetic squeegee technology is that each magnetizable material can only be magnetized up to a certain degree of saturation and that in practice considerable distances between the pole faces of the magnetic device and the squeegees or parts of squeegee devices to be magnetized increase are bridged. Since these two disadvantages have an additive effect, the designer and the user of such devices often reach the limits of the possible applications. In practical terms, this means that with magnetic doctor devices, in particular magnetic roller doctor blades of small diameter, it is not possible to achieve sufficiently high contact forces, so that their application, which would often be very necessary, has to be avoided. If the user wants to use a magnetically pressed doctor blade instead of a magnetically pressed doctor blade of small diameter, it is possible to provide such a doctor element with a very small curve only in the contact area and to widen and widen it in the area away from the application level also to dimension its height so large that the cross section, or the size of the magnetizable mass, can be dimensioned as required.
Die Praxis hat aber gezeigt, daß damit andere Nachteile verbunden sind, die der Anwendung solcher Rakeln in der Praxis entgegenstehen: es sind dies die in der Technik allgemein kannten Geradheits- bzw. Verbiegungsprobleme. Die Eigensteifigkeit solcher Rakelelemente ist für Rakelarbeiten, die mit hoher Präzision erfolgen sollen, zu groß, dies insbesondere bei großen Arbeitsbreiten, die aber jetzt in der Praxis immer mehr gefragt sind. Wie bekannt, wachsen Verbiegungsprobleme derartiger Teile proportional zur dritten Potenz ihrer Länge.Practice has shown, however, that there are other disadvantages associated with the use of such doctor blades in practice: these are the straightness or bending problems which are generally known in the art. The inherent rigidity of such squeegee elements is too great for squeegee work that is to be carried out with high precision, in particular in the case of large working widths, but which are now increasingly in demand in practice. As is well known, bending problems of such parts grow in proportion to the third power of their length.
Dieser allgemeine Nachteil der Verbiegungsprobleme haftet aber selbstverständlich nicht nur solchen magnetisch angepreßten Rakeln sondern auch den mit mechanischen Hilfsmitteln angepreßten Rakel an. Die gesamte Beschichtungs- und Auftragungstechnik hat in allen Branchen, die mit Rakeln arbeiten, sehr darunter zu leiden; es sind zahlreiche Erfindungen und Konstruktionen bekannt, deren Aufgabe nur darin besteht, an Rakeln auftretende Geradheitsprobleme und daraus entstehende Auftragungsungleichmäßigkeiten zu beseitigen.Of course, this general disadvantage of the bending problems does not only adhere to such magnetically pressed doctor blades but also to the doctor blade pressed on with mechanical aids. The entire coating and application technology has to suffer greatly in all branches that work with doctor blades; numerous inventions and constructions are known, the task of which is only to eliminate straightness problems which occur on doctor blades and the application irregularities which result therefrom.
Der hiemit vorgestellten Erfindung liegt die Aufgabe zugrunde, vorbeschriebene, den Stand der Technik anhaftende Nachteile zu beseitigen und eine vielseitig verwendbare, mit sehr großer Präzision arbeitende, dennoch aber sehr einfach konstruierte und einfach zu handhabende Rakel bzw. Rakelvorrichtung zu schaffen.The object of the invention thus presented is to eliminate the above-described disadvantages inherent in the prior art and to provide a versatile doctor blade or doctor blade device which works with great precision but is nevertheless very simple in construction and is easy to handle.
Die erfindungsgemäße Rakel bzw. Rakelvorrichtung besteht aus einer Rakelhalte- und Anpreßleiste und aus einer Rakelleiste, die an der Rakelanliegestelle als Arbeitselement ausgebildet bzw. ein solches ist und die auf ihre gesamte Erstreckungslänge in vertikaler oder annähernd vertikaler Richtung zur Arbeitsfläche schiebebeweglich, flächehberührend und vorzugsweise mehr als zur Hälfte des Querschnittsumfanges der Rakelleiste/des Arbeitselementes umgreifend oder eingreifend ist; in die, diese Steck/Schiebeverbindung ermöglichende nutförmige Ausnehmung der Rakelhalte- und Anpreßleiste, ist in dem die Rakelanpreßkraft übertragenden Bereich zwischen diesen beiden Leisten, über deren Längserstreckung reichend, ein druckelastisches, die Anpreßkraft vergleichmäßigendes oder/und gegebenenfalls erzeugendes Element, an beide leisten anliegend und ggf. die Rakelleiste auch u-förmig umgreifend und somit auch die beiden Seitenflächen berührend, eingesetzt.The squeegee or squeegee device according to the invention consists of a squeegee holding and pressure bar and a squeegee bar which is formed or is a working element at the squeegee contact point and which is movable along its entire length in the vertical or approximately vertical direction to the work surface, touching the surface and preferably more as encompassing or engaging half of the cross-sectional circumference of the squeegee strip / the working element; into the groove-shaped recess of the squeegee holding and pressure bar, which makes this plug / slide connection possible, is in the area transmitting the squeegee pressure force between these two bars, extending over their longitudinal extent, a pressure-elastic, the pressure force equalizing and / or if necessary generating element, applied to both of them and, if necessary, also enclosing the squeegee in a U-shape and thus also touching the two side surfaces.
Aus diesem neuen erfindungsgemäßen Konstruktionssachverhalt entsteht ein grundlegend neuer funktioneller Sachverhalt, der völlig gleichmäßiges, anpassendes Anliegen der Arbeitskante des Arbeitselementes an der Arbeitsfläche bzw. Schablone und demgemäß hochpräzise Rakelarbeitsleistung bewirkt, wobei aber außer den hier beschriebenen und zeichnerisch dargestellten Konstruktionsmerkmalen auch die dem Erfindungsgedanken entsprechende Materialauswahl und Querschnittsdimensionierung in funktioneller Hinsicht, d.h. ergebnisbezogen, von wesentlicher Bedeutung ist.From this new design issue according to the invention, a fundamentally new functional issue arises, which causes the working edge of the working element to lie on the work surface or stencil in a completely uniform, adapting manner and accordingly a highly precise doctoring work performance, but in addition to the construction features described and illustrated here, the choice of material corresponding to the idea of the invention and cross-sectional dimensioning in functional terms, ie results-based, is essential.
In funktioneller Hinsicht neuartig ist unter anderem auch der in einem der Ansprüche zur Darstellung gelangende Sachverhalt des kombinierten Gegeneinander- und Zusammenwirkens von zwei völlig unterschiedlichen Arten der Anpreßdruckerzeugung.From a functional point of view, the fact of the combined interaction and interaction of two completely different types of contact pressure generation, which is presented in one of the claims, is also new.
Den in den Fig. 2 bis 17 dargestellten, erfindungsgemäß konstruierten Rakeln und Rakelvorrichtungen wurde eine dem Stand der Technik entnommene Fig. 1 vorangestellt, die eine der bisher unternommenen Bemühungen zur Erhöhung der Anpreßkraft einer magnetisch angepreßten Rakelrolle relativ kleinen Durchmessers deutlich macht: die auf die Arbeitsrolle aufgelegte zweite Rolle soll die Anpreßkraft der Arbeitsrolle erhöhen, die hierzu erforderliche Halterung ist als Zweitfunktion als höhenverstellbare Stauprofilleiste ausgebildet.The squeegees and squeegee devices constructed in accordance with the invention and shown in FIGS. 2 to 17 were preceded by FIG. 1 taken from the prior art, which illustrates one of the efforts made up to now to increase the contact pressure of a magnetically pressed doctor roller relatively small in diameter: that of the The second roll placed on the work roll is intended to increase the contact pressure of the work roll; the holder required for this is designed as a second function as a height-adjustable stowage profile strip.
Die Fig.2 zeigt eine Darstellung der wesentlichen Erfindungssachverhalte bzw. Konstruktionsmerkmale einer erfindungsgemäß konstruierten Rakelvorrichtung 1 in abstrahierender Darstellungsart: eine Rakelhalte- und Anpreßleiste 2 mit u-förmigem Querschnitt, der durch eine nutförmige Ausnehmung 3 gebildet wird, mit einem in diese nutförmige Ausnehmung 3 eingelegten druckelastischen Element 5, das in diesem Ausführungsbeispiel gemäß Fig.2 als eine weitere Profilleiste mit wiederum u-förmigem Querschnitt ausgebildet ist und zwecks Erhöhung der Druckelastizität einen Hohlraum 56 eingearbeitet haben kann. An diesem druckeleastischen Profilelement 5, das in die nutförmige Ausnehmung 3 schiebebeweglich eingelegt ist, anliegend befindet sich die Rakelprofilleiste bzw. das eigentliche Rakelelement 4. Auch dieses Rakelelement 4 ist in der nutförmigen Ausnehmung 33 des elastischen Profilelementes 5 schiebebeweglich gehalten. Die Rakelhalte- und Anpreß- leiste 2 ist zwischen Gleitelementen 6 schiebebeweglich gehalten. Die Rakelleiste 4 berührt im Arbeitsbereich eine wahlweise ebene oder gewölbte bzw. gerundete Arbeitsfläche 7 bzw. zeichnerisch nicht gesondert dargestellte darauf anliegende Materialbahn 72 (Arbeitstisch oder Magnetarbeitstisch 71, Gegenwalze, Magnetwalze mit Magnet 71). Die Rakelanpreßkraft wird - abstrahierend durch einen kräftigen Pfeil 203 dargestellt- entweder durch mechanische Mittel (nicht dargestellt) oder durch magnetische Anziehungskraft bewirkt, wofür es erfindungsgemäß vorgesehen ist , die Rakelhalte- und Anpreßleiste 2 (zumindest teilweise) aus magnetischen Material herzustellen. Erfindungsgemäß ist auch vorgesehen, daß mehrere Arten der Rakelanpreßkrafterzeugung addierend miteinander kombiniert werden können. Ferner ist erfindungsgemäß vorgesehen, daß die die Magnetkraft erzeugenden Elemente mit der Rakelhalte- und Anpreßleiste 2 verbunden sein können und das diesfalls der Arbeitstisch bzw. die Arbeitswalze aus magnetisierbarem Material besteht. Der in den die Anpreßkraft darstellenden Pfeil 203 eingesetzte kleine Doppelpfeil kennzeichnet die Schiebebeweglichkeit der Leisten bzw. der Elemente 2 und 4 in Richtung der senkrechten Achse auf die Arbeitsfläche bzw. deren relative Verschieblichkeit gegeneinander, die eines der wesentlichen Erfindungskennzeichen ist.2 shows an illustration of the essential facts of the invention or construction features of a doctor device 1 constructed according to the invention in an abstract representation: a doctor holder and
Im Gegensatz zu Fig.2 zeigen die weiteren Figuren druckelastische Körper in unterschiedlichen Ausführungsvarianten, die das Rakelelement 4 jedoch nicht so wie in Fig.2 dargestellt an drei Flächen berührend umgreifen sondern nur die dem Rakelanliegebereich gegenüberliegende Seite bzw. Fläche der Rakelleiste 4 berühren, an der die Rakelanpreßkräft in die Rakelleiste eingeleitet wird. Das Rakelelement, das in manchen Ausführungsbeispielen eine Rolle ist, ist schiebebeweglich in der Ausnehmung 3 der Rakelhalte- und Anpreßleiste gehalten, die auch schwenkbeweglich gehalten sein kann.In contrast to FIG. 2, the other figures show pressure-elastic bodies in different design variants, which, however, do not touch the
Die Fig. 3 bis 5 zeigen drei weitere Ausführungsbeispiele erfindungsgemäß konstruierter Rakelvorrichtungen 1 bzw. deren wesentliche Konstruktionsteile. In Fig. 3 wird die Rakelhalte- und Anpreßleiste 2 mit z.B. hydraulisch betätigten Hilfsmitteln, die ortsfest angebracht sind, angepreßt. In der Leiste 2 befindet sich eine nutförmige Ausnehmung 3, in die die Rakelleiste 4 eingesetzt ist. Zwischen der Rakelleiste 4 und der Leiste 2 ist ein druckelastisches Element 5, das als Hohlkörper ausgebildet ist, in die nutförmige Ausnehmung 3 eingelegt. Die Leiste 2 wird von zwei Leisten 6, die ortsfest angebracht sind, gleitbeweglich gehalten. Das Arbeitselement 41 ist gerundet und liegt an der Arbeitsfläche 7 an.3 to 5 show three further exemplary embodiments of doctor devices 1 constructed according to the invention and their essential structural parts. In Fig. 3 the squeegee and
In Fig. 4 sind die Leisten 6 U-förmig als Haltekörper ausgebildet. Die Rakelleiste 44 hat eine gleitlagerförmige Ausnehmung in die ein Arbeitselement 43 drehbeweglich oder drehfixiert eingesetzt ist. Die Arbeitsfläche ist als Magnettisch 71 ausgebildet, auf der eine Bahn 72 und eine Schablone 73 aufliegt.In Fig. 4, the strips 6 are U-shaped as a holding body. The
Der in Fig. 5 dargestellte Sachverhalt entspricht einer Kombination der Fig. 3 und 4, wobei in strichlierter Ausführung dargestellt ist, daß die leiste 2, falls eine groß Rakelanpreßkraft gefordert wird, für die die magnetisierbare Masse der Leiste 2 zu gering ist, je nach Erfordernis vergrößert als Leiste 21 ausgebildet sein kann. Die Zwischenleiste 42 ist deshalb strichliert gezeichnet, weil eine solche Leiste im besonderen Ausführungsbeispiel der Fig. 5 weggelassen werden könnte, falls das Arbeitselement 43 in drehfixierter Ausführung verwendet wird.The situation shown in FIG. 5 corresponds to a combination of FIGS. 3 and 4, it being shown in dashed lines that the
Fig. 6 entspricht im wesentlichen der Fig. 3, unterschiedlich dazu ist das Arbeitselement 45 spitzwinkelig geformt und die Rakelanpreßkraft wird durch das Eigengewicht der Leiste 2 und durch zusätzlich aufgesetzte Gewichte 22, die nur symbolisch dargestellt sind, bewirkt. Anstatt eines Elementes 5 sind zwei, diesem funktionsgleiche Elemente 51 und 52 eingesetzt.Fig. 6 corresponds essentially to Fig. 3, differently to the working
In Fig. 7 ist ein Tragholm 61, z.B. mit Verschraubungen 62, ortsfest angebracht, ähnlich wie in Fig. 4 dargestellt. In die Leiste 2 kann, wie in Fig. 4 und 5 und in anderen Figuren dargestellt (in Fig. 7 aber nicht gezeichnet) durch einen Magneteinrichtung magnetisch bewirkte Anpreßkraft oder/und eine mittels eines flüssigen oder gasförmigen Mediums erzeugte Anpreßkraft eingeleitet werden; diesfalls wird die vertikale Schiebeglichkeit der Leiste 2 nur beim Hinzuschalten der Magnetkraft wirksam. Die Kombination zweier unterschiedlicher Anpreßkräfte kann durch addierendes Zusammenwirken eine dementsprechend größere Gesamtanpreßkraft zustande bringen. Des weiteren kann z.B. bei einem geschwindigkeitsvariablen Rakelprozeß mit einer der beiden Anpreßkraftkomponenten eine Grundeinstellung der Anpreßkraft vorgenommen werden, die für die langsamste in Betracht kommende Arbeitsgeschwindigkeit richtig bemessen ist und kann dann, mit der zweiten Anpreßkraftkomponente die bei Geschwindigkeitserhöhung erforderlich werdende Anpreßkrafterhöhung z.B. durch elektronische Steuerung automatisch durchführen - ebenso kann bei Verringerung der Geschwindikeit die Anpreßkraft verringert werden.In Fig. 7 a
In Fig. 8 ist eine Leiste 23 an einem Gelenk 124 drehschwenbeweglich gehalten, in die Leiste 46 ist eine elastische Rakelklinge 47 eingesetzt.In FIG. 8, a
In Fig. 9 ist die leiste 24 auf ihrer gesamte Länge kreiszylindrisch geformt, es würde aber genügen, wenn nur jene Stellen kreiszylindrisch oder gerundet geformt wären, an welchen die Gleithalteteile 64 anliegen. Die Leiste 4 ist mit einem spitzwinkeligen Arbeitselement 45 ausgebildet, die Ausnehmung 3 ist in der Leiste 24 asymmetrisch angeordnet und ist im Öffnungsbereich mit Vorsprüngen 31 versehen, die die Leiste 4 beim Abheben der Leiste 24 an unerwünschtem Herausgleiten hindern. An der Leiste 24 ist ein Arm 25 befestigt, durch den die Schwenkbeweglichkeit mittels verstellbarer Anschläge 26 begrenzt wird.In Fig. 9, the
Fig. 10 ist ähnlich der Ausführung Fig. 9, jedoch ist der abgerissen gezeichnete Arm 27 Teil einer Hilfsvorrichtung, an der die Leiste 24 drehfixiert - gegebenenfalls höhenbeweglich, gegebenenfalls pendelnd - gehalten ist. In die Leiste 46 ist ein biege- und druckelastisches Arbeitselement 47 eingesetzt, dessen Verbiegung aus der Bewegung der Schablone 73 in Richtung des Pfeiles 74 und aus der magnetische bewirkten Rakelanpressung resultiert. Auf die Leiste 24 ist eine um diese drehschwenkbar bewegliche Stauprofilleiste 28 aufgesteckt, die Schwenkbewegung dieser Leiste 28 wird durch eine Schwenkvorrichtung 29 betätigt.Fig. 10 is similar to the embodiment of Fig. 9, but is torn off
Fig. 11 zeigt eine Leiste 2 mit Ansatzleisten 201, durch die die Leiste 2 an Gewindespindeln 202 so gehalten ist, daß die Leiste 2 höhenbeweglich bzw. in ihrer Distanz zur Arbeitsfläche 72 verstellbar ist. In Richtung des Pfeiles 203 wird die Leiste 2 gegen ein druckelastisches Element 53, das nicht als Hohlkörper sondern massiv ausgebildet ist, gepreßt. Distanzveränderung der Leiste 2 bewirkt Veränderung des Anpreßdruckes.11 shows a
Die Fig. 12 bis 14 zeigen Konstruktionsbeispiele erfindungsgemäßer Rakelvorrichtungen unter Verwendung von jeweils mehr als einer Rakel bzw. Rakelleiste, die mit dem Gattungsbegriff Spaltrakeln zu bezeichnen sind: zwischen zwei Rakelleisten - die in dieser Funktionsart auch Dichtleisten genannt werden könnten - ist ein spalt- oder trogförmiger Substanzraum 75 gebildet, in den die Substanz durch einen Spaltz 76 und gegebenenfalls durch Bohrungen 77 aus entweder einem Trograum 78 oder aus einem geschlossenen Hohlraum 79 zugeführt wird. Die Zuführung in diesem Hohlraum erfolgt durch eine Öffnung 80.12 to 14 show construction examples of doctor devices according to the invention, each using more than one doctor blade or doctor bar, which can be referred to with the generic term splitting doctor blades: between two doctor blades - which could also be called sealing strips in this type of function - there is a gap or trough-
Der Trograum 78 wird in Fig. 12 durch z.B. zwei Vierkantrohre 81 und 82 gebildet, die an der kammartig ausgebildeten Leiste 2 und an Stirnplatten 83 abdichtend befestigt sind.The
In Fig. 13 wird der Trograum durch eine Trogwand 84 und durch die Arbeitsfläche 7 und durch die Stirnplatten 83 gebildet. Außer der Leiste 2 ist in Fig. 13 auch eine Leiste 2a vorhanden, die an der Trogwand 84 befestigt ist und eine Leiste 4a abdichtend an die Fläche 7 andrückt. In die Rakelhalteanpreßleiste 2 in Fig. 13 wird die Anpreßkraft magnetisch oder/und z.B. pneumatisch oder hydraulisch durch das Element 5 eingeleitet, wofür eine strichliert eingezeichnete Gegenabstützung als Hilfseinrichtung erforderlich ist.13, the trough space is formed by a
In Fig. 15 ist eine Doppel-Rakelleiste 48 mit zwei Elementen 54, 55 in die Ausnehmung der Leiste 2 eingesetzt. Die Substanzzuführung erfolgt durch einen Hohlkörper 85.15, a
Die Fig. 16 zeigt ein Ausführungsbeispiel, in dem die Leiste 4 zusätzlich zu den in anderen Figuren dargestellten Ausführungsvarianten U-förmig ausgebildet ist, wodurch eine vierfache Gleitflächenberührung zur Leiste 2 entsteht, die Rakelanpressung erfolgt magnetisch und/oder mechanisch z.B. mit strichliert gezeichneten, hydraulischen Hilfsvorrichtungen, derselbe Sachverhalt ist auch für Fig. 12 zutreffend.16 shows an exemplary embodiment in which the
In der Fig. 17 ist eine Einrichtung in der der Fig. 16 entsprechenden Konstruktionsart und ähnlich den in den Fig. 12 bis 15 dargestellten Funktionsarten um 180° gewendet, d.h. also von unten nach oben arbeitend, dargestellt. Die Rakelleiste 4 ist als ein Hohlkörper 49 ausgebildet, der ein spitzwinkelig geformtes Arbeitselement 45 und ein Arbeitselement 43 mit kreisförmigem Querschnitt aufweist.In Fig. 17, a device in the construction corresponding to Fig. 16 and similar to the functions shown in Figs. 12 to 15 is turned through 180 °, i.e. working from bottom to top. The
Diese besonderen Ausbildungsformen der Leiste 4/49 in den Fig. 16/17 bietet unter anderem den anwendungstechnischen Vorteil, daß keine Substanz in die zwischen den Gleitflächen der Leisten 2 und 4 bestehenden Spalträume gelangen kann.These special training forms of the
Claims (24)
- Doctor device for various uses such as, for example, coating application or removal of substances to/from flat surfaces such as, for example, material webs, transport tracks, conveyor belts or rolls (7, 72) and/or for cleaning and/or for drying smooth, rough or grained surfaces such as, for example, material webs, conveyor belts or rolls (7, 72), having at least one doctor which consists of at least one doctor-holding and -pressing strip (2, 2a, 23, 24), preferably in one piece, which presses a doctor strip (4, 4a, 42, 44, 46), a part constructed as an operating element (41, 43, 45, 47) or a part inserted into the doctor strip, including at least one elastic element (5) which is arranged between the two strips - the doctor-holding and -pressing strip (2, 2a, 23, 24) and the doctor strip (4, 4a, 42, 44, 46) or the operating element (41, 43, 45, 47)- at a contact point against at least one operating surface (7, 72, 73), which can be, for example, a template or a screen cylinder (73), characterized in that the doctor-holding and -pressing strip (2, 2a, 23, 24) is held so as to be movable by sliding or pivoting in a vertical or approximately vertical direction; and the doctor strip (4, 4a, 42, 44, 46) or the operating element (41, 43, 45, 47) is held so as to be movable by sliding in the same direction in a groove-like recess (3) of the doctor-holding and -pressing strip.
- Doctor device according to Claim 1, characterized in that, in the groove-like recess (3) in the region between the strips (2, 4), there is inserted a compressive elastic element (5) which, at least in the region transmitting the doctor contact force, bears on the doctor-holding and -pressing strip (2) and on the doctor strip (4) or the operating element (41, 43, 45, 47), in a manner transmitting the doctor contact force, over the entire length extent.
- Doctor device according to one of the preceding claims, characterized in that the elastic element (5) is constructed with a cross-sectional shape which engages around the doctor strip (4, 4a, 42, 44, 46) or the operating element (41, 43, 45, 47) and thus also bears on their side surfaces.
- Doctor device according to one of the preceding claims, characterized in that the doctor strip (4) or the operating element (41, 43, 45, 47) is held or is inserted so as to be movable by sliding in the elastic element (5) which also contacts the doctor strip (4) or the operating element (41, 43, 45, 47) on its side surfaces.
- Doctor device according to one of the preceding claims, characterized in that the elastic element (5) is provided with a cavity (55) increasing the elasticity.
- Doctor device according to one of the preceding claims, characterized in that the elastic element (5) is designed only as a hollow body, for example as a hose, which is filled with a liquid or gaseous medium whose compressive elasticity can be influenced by means of this filling.
- Doctor device according to one of Claims 1 to 5, characterized in that the elastic element (5) is designed without a cavity, for example as a circular profile, and is inserted into the groove-like recess (3) in the narrow side of the latter, the diameter of said element preferably corresponding to the width of the groove-like recess (3).
- Doctor device according to one of the preceding claims, characterized in that the elastic element (5) is inserted so as to be movable by sliding into the groove-like recess (3).
- Doctor device according to one of the preceding claims, characterized in that the doctor strip (4, 4a, 44, 46) or the operating element or parts (41, 43, 45, 47) of the same is or are compressively elastic.
- Doctor device according to one of the preceding claims, characterized in that the elastic element or a pressure evening element (5, 51-55) is inserted loosely between the two strips into the groove-like recess of the doctor-holding and -pressing strip (2, 2a, 23, 24), or is fastened to one of these two strips or is incorporated in one of these two strips.
- Doctor device according to one of the preceding Claims 5, 6 or 8 to 10, characterized in that a medium, if necessary under variable pressure, is introduced into the cavity (55), itself generates the doctor contact pressure, and routes to both sides, the pressure acting on the operating element (41, 43, 45, 47) and against the doctor-holding and -pressing strip (2, 23, 24).
- Doctor device according to one of the preceding claims, characterized in that an operating element (43, 47) is inserted into the doctor strip (44, 46, 49), said operating element consisting of a profile rod with a preferably small cross-section which can be shaped to be polygonal, rounded or else circular.
- Doctor device according to one of the preceding claims, characterized in that it is constructed with two doctors constructed in accordance with one or more of the preceding claims, which are arranged parallel and with a spacing from each other; and in that the substance to be applied or part of the substance to be removed can be fed or discharged in the spacing region between the two doctors (Figs. 12, 13, 14 and 17).
- Doctor device according to one of the preceding claims, characterized in that two or more interacting elastic elements (51, 52, 54, 55) are provided.
- Doctor device according to one of the preceding claims, characterized in that the doctor -holding and -pressing strip (2, 23, 24) is held in or on a holding device (6, 61, 25, 64) so as to be movable by sliding or pivoting and thus, in the case of a vertical or approximately vertical arrangement, bears with its dead weight on the doctor strip (4, 44, 46) or on the operating element (41, 43, 45, 47); and in that an additional contact force can be introduced into or applied to a doctor-holding and -pressing strip (2, 23, 24) which is arranged in this manner.
- Doctor device according to one of the preceding claims, characterized in that the doctor-holding and -pressing strip (2, 23, 24) consists at least in part of magnetizable material; and in that a magnetic device (71) which, if necessary, generates an additionally acting doctor contact force magnetically, is connected to the doctor device.
- Doctor device according to one of the preceding claims, characterized in that an elastic blade (47) or a profiled rod (43), if appropriate with a circular cross-section, is inserted into the doctor strip as operating element; and in that such a profiled rod having a circular cross-section is, if appropriate, fixed or movable in terms of rotation.
- Doctor device according to one of the preceding claims, characterized in that an operating element (43) having a circular cross-section is inserted - preferably so as to be rotatable - and an elastic element is inserted into the groove-like recess of the doctor -holding and-pressing strip (2); and in that there is inserted between them a narrow intermediate element (42) which is preferably a sliding element.
- Doctor device according to one of the preceding claims, characterized in that the doctor-holding and -pressing strip (24), at least in partial regions of its length extent and its circumference, is of circular-cylindrical or rounded shape and is held by these rounded parts so as to be rotatable or pivotable, the extent of this pivoting or rotating mobility being able to be limited and/or controlled as appropriate.
- Doctor device according to one of the preceding claims, characterized in that the doctor-holding and -pressing strip (23) is held pivotably on a rotary joint (124).
- Doctor device according to one of the preceding claims, characterized in that the doctor-holding and -pressing strip (24), at least in its length extent corresponding to the operating width, is of circular-cylindrical shape; and in that a damming profiled strip (28) is rotatably/pivotably supported thereon.
- Doctor device according to one of the preceding claims, characterized in that it consists of two or more doctor units and is combined with a substance feeding device which can be of trough-shaped (78) design or designed as a closed (79) hollow body.
- Doctor device according to one of the preceding claims, characterized in that it is equipped with a doctor strip (8) of twin design and has a substance feed located therebetween which, if appropriate, takes place from a closed cavity (85).
- Doctor device according to one of the preceding Claims 15 to 23, characterized in that the doctor strip (4), gripping the doctor-holding and -pressing strip (2), is turned up outwards and consequently rests between the doctor-holding and-pressing strip (2) and the holding device (6) therefor.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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AT636/91 | 1991-03-21 | ||
AT0063691A AT401894B (en) | 1991-03-21 | 1991-03-21 | Squeegee device |
PCT/AT1992/000039 WO1992016308A1 (en) | 1991-03-21 | 1992-03-20 | Doctor blade or doctor blade device |
Publications (2)
Publication Number | Publication Date |
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EP0530349A1 EP0530349A1 (en) | 1993-03-10 |
EP0530349B1 true EP0530349B1 (en) | 1995-12-06 |
Family
ID=3495834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP92908382A Expired - Lifetime EP0530349B1 (en) | 1991-03-21 | 1992-03-20 | Doctor blade device |
Country Status (4)
Country | Link |
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EP (1) | EP0530349B1 (en) |
AT (2) | AT401894B (en) |
DE (1) | DE59204573D1 (en) |
WO (1) | WO1992016308A1 (en) |
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DE9302207U1 (en) * | 1993-02-12 | 1994-06-09 | Zimmer, Johannes, Klagenfurt | Device for the spreading application of flowable substances |
US6135025A (en) * | 1994-02-12 | 2000-10-24 | Zimmer; Johannes | Process and device for cleaning an application device |
DE10144600A1 (en) * | 2001-09-11 | 2003-03-27 | Voith Paper Patent Gmbh | Applicator station, to coat the surface of a moving paper/cardboard web with a liquid/paste coating medium, has a large gap between the applicator and the doctor station with two spaced doctor rod units |
GB2445550A (en) * | 2007-01-15 | 2008-07-16 | Dek Int Gmbh | Wiper blade holder for use in a screen printing machine and wiper blade therefor |
CN103537409B (en) * | 2013-10-25 | 2016-01-13 | 昆山无名机械有限公司 | A kind of coating machine |
CN114953595A (en) * | 2022-05-17 | 2022-08-30 | 亳州市裕同印刷包装有限公司 | Scraper mechanism and edge scraping equipment |
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BE760051A (en) * | 1969-12-11 | 1971-05-17 | Mascioni Mabetex B E U Mascion | PRINTING SQUEEGEE ON FRAME AND PRESSURE ADJUSTMENT BY MEANS OF AN INTERPOSED ELASTIC CUSHION |
GB1313046A (en) * | 1970-05-15 | 1973-04-11 | Ichinose S | Apparatus for inclusion in a screen printing machine |
AT338736B (en) * | 1973-02-09 | 1977-09-12 | Zimmer Peter | SQUEEGEE DEVICE FOR TREATMENT OF FLAT TRACKS |
US3930445A (en) * | 1974-03-14 | 1976-01-06 | Precision Screen Machines, Inc. | Squeegee assembly for use on a screen printing machine |
DE2611625B2 (en) * | 1976-03-19 | 1979-07-12 | Hoechst Ag, 6000 Frankfurt | Coating device |
US4241691A (en) * | 1978-08-30 | 1980-12-30 | Monsanto Company | Doctor blade holder |
US4387663A (en) * | 1981-10-07 | 1983-06-14 | Beloit Corporation | Blade type fountain coater metering device |
DE3338323A1 (en) * | 1982-11-23 | 1984-05-24 | Jagenberg AG, 4000 Düsseldorf | DEVICE FOR COATING CONTINUOUS MATERIALS |
FI853041A0 (en) * | 1985-08-07 | 1985-08-07 | Valmet Oy | ANORDING FROM THE MATERIAL. |
BR8807241A (en) * | 1987-10-10 | 1989-10-31 | Johannes Zimmer | SQUEEGEE EQUIPMENT FOR THE APPLICATION OF MATERIAL |
FR2621528A1 (en) * | 1987-10-13 | 1989-04-14 | Mach Textiles | Coating device for a rotary or flat printing machine stencil |
AT393973B (en) * | 1989-12-21 | 1992-01-10 | Johannes Zimmer | DEVICE FOR COATING TEXTILES AND OTHER SURFACES, RAILWAY-SHAPED OR IN PIECES |
-
1991
- 1991-03-21 AT AT0063691A patent/AT401894B/en not_active IP Right Cessation
-
1992
- 1992-03-20 AT AT92908382T patent/ATE131086T1/en not_active IP Right Cessation
- 1992-03-20 WO PCT/AT1992/000039 patent/WO1992016308A1/en active IP Right Grant
- 1992-03-20 EP EP92908382A patent/EP0530349B1/en not_active Expired - Lifetime
- 1992-03-20 DE DE59204573T patent/DE59204573D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59204573D1 (en) | 1996-01-18 |
ATA63691A (en) | 1996-05-15 |
AT401894B (en) | 1996-12-27 |
WO1992016308A1 (en) | 1992-10-01 |
ATE131086T1 (en) | 1995-12-15 |
EP0530349A1 (en) | 1993-03-10 |
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