DE4209566A1 - Doctor blade mechanism with compressible blade - has holding and compression slat parallel to mechanism axis, extending over working width - Google Patents

Abstract

The mechanism (1) doctor blade (6) applies ink, paint (7) etc. to a material web (19) or a roller, moving at right angles to the blade. A profiled damming strip (3) has a pivoted damming face (300) to form an ink etc. collecting chamber (301) in front of the doctor blade. The mechanism has a holder and compression slat (2), with longitudinal recess (30). The slat contains a doctor blade support strip (5), which projects from it by the working width. Part of the holder strip forms a bearing for the damming strip, etc on the holder slat with a recess so that it may be pivoted and slid. The pivot positions of the damming strip are adjustable and lockable by a connected adjuster. USE/ADVANTAGE - For ink, or coating material application, with versatile design for wide range application.

Description

The invention relates to a doctor blade device with a doctor blade element that, under pressure, is a substance like pressure paint or coating agent on a cross and relative sheet-like element moved to the doctor element, such as a web, a flat piece of material or another a sheet-like structure such as a roller or a belt applied, and with a stowage profile strip, the one over the working width parallel to the longitudinal axis of the squeegee extending, a substance storage space in front of the Rakelele ment influencing storage area and with this Storage area around a parallel to the longitudinal axis of the doctor device extending axis is pivotable.

Known squeegee devices of this type comprise a holding / pressure bar, which is at the same time designed as a stowage profile bar and is placed with a profile bar recess on a squeegee roller, the holding / pressure bar being pivotable about the squeegee roller vertex region. The pivot angle that can be realized in practice with such a device is considerably restricted. In particular, only swivel angle changes in the range of approximately 15 ° to 30 ° are possible. This is due to the fact that a doctor blade roller with a relatively large diameter must be provided for larger swivel angles. However, such is only suitable for very special orders with relatively high contact pressure. In addition, a squeegee roller provided as a bearing body for the holding / pressure bar forms a squeegee element which is relatively biestei over the working width. For satisfactory application results, system deviations or contact differences between the squeegee edge and the application area must be avoided or as small as possible over the working width. It has been found that e.g. B. a system or straightness deviation of only 1/10 mm causes an adverse amount change of the raked substance of 100 g / m ² and more. For desired and required order qualities, plant straightness deviations usually have to be less than 1/10 mm and they can often only be of the order of 1/1000 mm. A uniform application should not only occur in every application width in practice, namely in particular application widths of several meters (e.g. 5 meters and more), but also, which is very important, free from adverse influences on the body stiffness Squeegee work elements and the angular position adjustment or change of the jam profile bar can be achieved. In addition, applications with different amounts of substance, different substance viscosities and / or different application speeds should be possible. The relative speed between squeegee and work surface is of minor importance, so that problems of a satisfactory contact and straightness adjustment of the squeegee working edge at different angular positions of the jam profile bar, different properties of application surfaces, different amounts of substance in front of the squeegee working element, fine regulation of contact pressures and / or adjustment defined and reproducible application results must be solved.

The known application devices of the type mentioned are procure so that given straightness and / or Deflection stiffness of the stowage profile forming holding / pressure bar and the squeegee roll essential liche, the pressure of the squeegee edge against the Order area are adversely influencing sizes.

To the substance storage space in front of a doctor element in one change larger dimension than this with one on one  Doctor blade roller attached stowage profile bar is possible, you have a holding / pressure bar with one firmly in it doctor blade provided, and the doctor blade with the holding / pressure bar around the blade working edge pivoted. There is a change in such a device of the substance storage space in front of the doctor blade only ge together with a change in the angle of attack of the squeegee blade possible. In itself, however, it is desirable that Working angle of a squeegee working element independent of adjust the substance back pressure in front of the doctor element and / or to be able to change. Another essential one Disadvantage of the device with pivotable, fixed in the Holding / pressure bar inserted doctor blade again in that the dominance of bending and / or Straightness behavior of the holding / pressure bar and the Squeegee blade a satisfactory line or straight line the squeegee edge matches the application area che not allowed. It is emphasized that mini Male system / straightness deviations from z. B. 1/10 mm, but also harmful in the order of 1/1000 mm impact. Such deviations can with the known Devices can hardly be compensated. To such disadvantages too reduce, are complex layer thickness measuring devices tations have been provided for an automatic shift thickness correction, a change in the pressure function and / or to control the substance supply, but always with Rejection leading misprints or faulty coating are connected.

Considered as a whole, the known squeegees must directions for changeable substance application stungen in accordance with the desired application for the purpose of different types of doctor devices be provided to substances in different Control and process quantities. Also point out the known doctor devices have the disadvantage that by construction, by storage of the Rakelele elements and due to the inherent rigidity of the doctor element harmful contact and system deviations between  Squeegee element and application area are caused, whereby especially very small but disadvantageous mismatch cannot be compensated for.

In contrast, the invention is based on the object one used for various job functions bares doctor blade device with a the substance space in front of the Swiveling jam profile influencing doctor element ste to create that avoids the disadvantages described the should, the squeegee edge one with a stop / on pressure bar interacting doctor element in optimal Working contact with the order area in particular large working widths should be feasible.

This object is achieved in connection with the features of the doctor device mentioned above solved that the squeegee one over the working width extend parallel to the longitudinal axis of the doctor device de includes holding / pressure bar with a longitudinal recess, into the squeegee bar provided with the squeegee element inserted without a fixed connection to the retaining bar is, the doctor element over the working width the retaining strip longitudinal recess protrudes and a part the circumference of the retaining bar a bearing body for the Congestion profile bar forms on which the congestion profile bar with a parallel to the longitudinal axis of the doctor device kenden jam profile recess placed in such a way is that the stowage profile bar pivotable by one Body longitudinal axis of the holding bar and swiveling direction is slidably mounted, the pivot position of the stowage profile bar through a connection with it the setting device can be changed and fixed is cash.

In the doctor device according to the invention, the holding / Pressure bar a bearing body for the stowage profile ste, the squeegee without a fixed connection to the Holding / pressure bar is inserted into this. So that is achieved that the stowage profile bar by a relative  large angle, in particular of the order of magnitude of 90 ° can pivot around the holding / pressure bar bar, the doctor blade provided with the doctor element in their local position regardless of the swivel movement supply of the stowage profile bar is arranged. Rigid and / or straightness properties of the stop / on pressure bar and the stowage profile bar and storage Accuracy of the stowage profile strip on the circumference of the holding / The pressure bar does not affect the squeegee bar. Conventional restrictions on arrangement, construction shape and storage of the holding / pressure bar are with the doctor blade device according to the invention eliminated. It is a Squeegee (a squeegee) that, although it, in Cross-section seen from the three components stowage profile bar, holding / pressure bar and squeegee together is a squeegee strip working edge or system ensures that ge over the working width slight unevenness in the application area (i.e. precisely in the order of 1/1000 mm). The squeegee or squeegee edge / surface che reacts at any point along the working width extraordinarily sensitive to adapt to the order area. You have a squeegee on hand, the univer sell for various application and coating types of application in a variety of doctor blade application directions using various settings parameter can be used. Are with the on the Retaining / pressure bar swivel-mounted storage profile do the control and / or adjustment of the substance amount in front of the doctor element in all desired quantities areas, d. H. from the smallest amounts of substance to guaranteed relatively large amounts of substance. Within of each quantity range can be sensitive orders Settings and / or changes with stepless Transitions and excellent reproductive ability testify. The angle of attack of the doctor element to the job area and the back pressure in front of the doctor element are independently adjustable. The invention Squeegee device can be shaped differently  Doctor elements with a wide variety of application characteristics Stiken be adjusted without changing the substance control in front of the doctor element restricted or be is prevented. A quick exchange of squeegee strips, the z. B. as a doctor element, a doctor blade, a round or pointed working edge or a doctor blade roller have is guaranteed. All in all with that doctor blade device according to the invention significant technical and economic advantages through universal application Possibilities in application and coating device achieved.

Special embodiments of the invention go in individual from the subclaims and the execution play out according to figure description. Below is summarized in a particularly practical form features and their advantages.

It is particularly useful that the squeegee along the upper longitudinal opposite the doctor element elastic side against the bottom surface of the holder last supported longitudinal recess and against lateral Areas of the retaining strip longitudinal recess is guided. As a result, it lies in the holder without a fixed connection bar inserted squeegee bar on the squeegee element opposite side loose over the working width pressure-elastic on the retaining strip recess floor. With this pressure provided over the working width Elasticity is achieved to a particular degree Contact pressure acting evenly across the squeegee Working width is distributed, so that also in this respect deflections, straightness inaccuracies and / or parallelism deviations of the holding / pressing bar and / or the stowage profile bar do not affect can or are compensated.

A particularly advantageous embodiment of the invention consists in that in the retaining strip longitudinal Ausneh mung extending part of the squeegee with respect  every squeegee cross-section in all degrees of freedom deformable and movable transversely to the longitudinal axis of the squeegee strip is. So that is in the holding / pressure bar Ausneh squeegee located on all sides so easily ver malleable, so that the squeegee bar is one over its own Extension length snake, whip and / or belt like deformable and / or twistable extension is element that is limp on all sides, so that the Squeegee bar opposite the holding / pressure bar in low inherent stiffness behavior in all degrees of freedom ten. That provided according to this embodiment Cross-sectional and material behavior of the squeegee ensures that it is transverse to all degrees of freedom its longitudinal extent in sections so convex and concave, deformable and / or bendable is that the inherent stiffness remaining in the squeegee strip not on their adaptability to the order area affects.

Another special embodiment is that the holding bar and the squeegee bar relative to each other at least slightly loose, movable and clamped free in all degrees of freedom along the length of the squeegee axis are arranged. The fact that the squeegee in the retaining strip recess in all degrees of freedom across for longitudinal extension with at least slight sliding relative mobility between the holding bar and the squeegee bar is inserted, it is in the holding bar recess mung completely jam-free, d. H. exposed and chip arranged freely. Add to this in an advantageous combination nation also the snake-like or whip-like form maintain the squeegee bar. The squeegee and the Retaining strip only act loose and therefore free of anything what elastic clamping forces together.

In particular by combining the above-mentioned configuration the squeegee is on all sides limp characteristic imparted, it being essential lich is that the slackness in all free  degrees across the length of the squeegee Coordination of material properties and cross-section the squeegee is formed on each other, and others on the other hand, the squeegee bar is sliding free of attachment and / or floating, d. H. especially without screw, Adhesive and / or clamping connection loosely in the holding / on pressure bar inserted, so that the doctor blade the straight the squeegee working pad does not have its own straightness juxtaposed.

It, the holding / pressure bar is particularly advantageous To be provided as a circular cylindrical profile bar which the stowage profile strip with a circular-concave Surface of the recess is positively placed.

It is particularly expedient to remove the stowage profile strips to be circular in cross-section, preferred so that the opening width between the Ausneh edges only slightly smaller than the circle diameter of the holding / pressure bar body. General is with one in relation to the cross-sectional diameter of the Holding / pressure bar with large opening width of the Staupro filleiste recess a relatively large swivel angle area of the stowage profile bar reached so that without further z. B. a jam profile swivel movement of 900 around the holding / pressure bar is possible.

There is a special embodiment of the invention in, in the area of each opening edge of the stowage profile the most one with the squeegee longitudinal axis to form parallel stowage area, the two stowage surfaces to each other, in particular at an angle of are aligned approximately 90 °. The stretches Holding / pressure bar within the angle between the two storage profile strip surfaces. Even then it can Opening width of the storage profile bar recess so large be that the part of the Hal te- / pressure bar in a peripheral portion of more than 90 ° free in the stowage profile recess opening  opposite the order area. You can then reach without further a working swivel angle of the stowage profile 60 °. The formation of a storage area has every opening edge of the stowage profile recess in particular the advantage that the squeegee as a tilt squeegee used in two opposite directions bar, the size of the substance space in front the doctor element, seen in the respective working direction hen, controllable by the assigned storage space and a is adjustable. With reversal of movement, i.e. H. when reversing the Direction of movement of one to be printed or coated tendency surface, the holding / pressure bar and thus the entire squeegee device is lifted off the work surface as well as about the substance supply in front of the doctor element ben, so that the substance then in opposite Rich tion can be doctored. The squeegee will held captive in the holding / pressure bar.

There are various embodiments of the invention very simple ways to lose the squeegee bar to hold bar in the holding / pressure bar without thereby the freedom of movement according to the invention and the free shaping property of the squeegee in the holder strip recess are impaired. Is expedient on the retaining strip recess a locking part like a tile or pen is placed and attached to the squeegee perform a recess in the area of the locking part formed, the locking member in the recess engages and thus grips under the squeegee, so that do not slip them out of the retaining strip recess can. The squeegee can also be lost bar be inserted into the retaining strip recess that the opening width of the retaining strip recess transverse to Squeegee longitudinal axis smaller than the cross-sectional dimensions sions of the retaining strip recess, the cross sectional shape of the squeegee the cross section of the holding strip recess is adapted. In particular a triangular squeegee in cross section and one appropriately shaped retaining strip recess is provided.  

The base side of the triangular is preferably located Doctor blade pressure elastic on the bottom of the retaining bar at. The excellent from the retaining strip recess The squeegee forms the tip of the triangular squeegee bar working edge.

It, the opening edges of the Stowage profile bar recess with a squeegee parallel to the longitudinal axis and transverse to the circumference of the holding / Pressure bar to provide directed edge or surface. Such an edge or surface serves as a stop against the excellent from the retaining strip recess Doctor bar or its doctor element. This is on simple way the end positions of the swivel position of the Congestion profile strip determined and limited.

It is particularly advantageous that the holding / pressing firmly at their ends especially by screw connection with holding parts of a holding device verbun that can be. It can be particularly useful be the holding device transversely, in particular vertically to be arranged movably to the application area. In development the invention, it is also possible to hold / on pressure bar, in particular in the form of a circular cylinder shaped profile bar to one inside the tether body and parallel to the longitudinal axis of the doctor blade extending axis rotatable or tiltable.

A facility for changing and adjusting the tilt position of the stowage profile strip expediently comprises a rotary Sliding joint, which is a swivel lever and / or scenery leadership forms. Such a facility is with one Machine part of an application machine connected.

A pressure-elastic system of the squeegee on the Side facing away from the squeegee element in the holding strip Acceptance can take place in an embodiment according to the invention can be realized in different ways. According to an out the squeegee bar itself consists of one  pressure elastic material. Instead or in addition is between squeegee bar and retaining bar recess a separate pressure-elastic element was used. This is at least either due to the holding bar or the squeegee loosely. For certain applications it is advisable to place the elastic element on the side of the squeegee bar opposite the squeegee element than with hydraulic or pneumatic power to form an impactable pressure element. About the sliding flexibility of the squeegee in particular in the direction across the work surface in a particularly large size are to be ensured in the retaining strip recess between the longitudinal sides of the squeegee and of the holding strip of sliding layers or elements det or arranged.

In general, you can get into the retaining strip recess various types of doctor blades according to the invention be inserted, the selection of which is to be carried out after the squeegee work. An embodiment of the squeegee groin consists of using at least one squeegee ment in one piece, being from all sides transverse to its longitudinal extent like a serpentine curved and deformable material in coordination with your Cross-sectional dimensioning exists. The squeegee can also strip element separately as a rod or strip element executed and inserted into the squeegee. A such insert element has in the area of the retaining strips approximately the same bending characteristic as the squeegee part receiving the squeegee element. It is special with a two-part squeegee ders advantageous that in the squeegee in a Ver equal to their total cross section in cross section very much small or tiny sized doctor element rod inserted is set, the rod material being relatively hard can. Due to the tiny rod cross section, one can Bendable bendability in combination with the Doctor blade are guaranteed. To a squeegee too form, a roller bar is inserted into the squeegee bar.  

The doctor device according to the invention is suitable depending on ge desired application excellent for by gravity the holding / pressure bar, magnetic, hydraulic and / or pneumatically caused pressure. Even the traffic jam profile strip also used as a pressure element will. According to a further embodiment, it can be used as Holding element or storage device for the holding / on pressure bar may be provided. The contact pressure is determined by loosely together with the doctor bar or the doctor element acting profile parts or device strips without that the bending, inherent rigidity and / or straight line characteristics of the stowage profile strip and the stops elements adversely affect the squeegee element can know.

The doctor device according to the invention can be used in doctor blades for a wide variety of applications in any location Position to the work surface, so from above or down to horizontal, vertical or obliquely application areas. The invention Squeegee device is especially for applications suitable with round templates or flat templates.

Further advantages and embodiments of the invention go from the following description of the in the scheme table drawing illustrated embodiments forth. Show it

Fig. 1 in cross-view of an inventive doctor blade device that is reversible ver as Kipprakel with two storage areas of the storage profile strip,

Fig. 2 to 6 according to the invention in transverse view of squeegee device with differently shaped blade strips and with particular design measures for the arrangement of the doctor bar in the Halteleistenausneh mung,

Fig. 7 in cross view of an inventive doctor device with means for Steue tion and adjustment of the pivot position of the storage profile strip and for moving the holding / pressure bar perpendicularly with respect to the application surface,

Fig. 8 in transverse view of a doctor device according to the invention with a pivotable / kippbe mounted mounting / pressure bar and

FIG. 9A to 9D in perspective view Rakellei most inventive squeegee devices.

In Fig. 1, 1 designates an inventive, also called a doctor blade squeegee device comprising a profile retaining strip 2 having incorporated therein a dovetail-shaped in cross-section, outwardly narrowing longitudinal groove or- recess 30 as well as a profile inserted in the recess 30 of doctor bar 5 with the retaining strip recess cross-section corresponding cross-sectional shape. The squeegee strip 5 has a pointed working / contact edge which forms a squeegee element 6 protruding from the holding recess 30 .

Embodiments of the invention are shown in all figures squeegee device shown in cross section. This extends perpendicular to the device cross section Squeegee device with a longitudinal squeegee axis across the Working width or across the width of a not Darge put application machine.

The squeegee 5 is set in the retaining strip recess 30 without a fixed connection to the retaining strip 2 such that it is guided on the lateral longitudinal sides and is arranged loosely movable in the direction transverse to the processing surface 19 . Due to the described dovetail shape of the holding strip recess 30 and the adapted (triangular) shape of the squeegee strip 5 , the latter is inserted captively into the holding strip recess 30 in order to be outside the squeegee operating state, ie when the squeegee 1 is lifted off the work surface 19 and / or in the case of a squeegee. Handling operations to avoid that the squeegee 5 unintentionally slide out of the holding / Füh groove 30 or can fall out.

The holding bar 2 is held by a holding device 480 of an application machine, not shown. The retaining strip 2 is fixed on each end side (end face), for. B. by screw 484 , connected to a cross plate 48 . The two holding plate 2 cross plate 48 are connected with a not shown in Fig. 1, over the order width erstrec kenden holding / supporting beam of the holding device 480 a related party.

The retaining bar 2 is designed as a circular cylindrical profile bar. With its peripheral surface 200 , it forms a bearing body for a stowage profile strip 3 which extends over the application width. This has with its recess wall of the circular circumferential shape of the retaining strip 2 adapted over the application width extending bearing recess. Thus, the stowage profile strip 3 with the circularly concave cross-section and the circumferential surface 200 of the holding strips 2 is fitted onto the circular-cylindrical holding strip 2 . By means of the retaining strip 2 as a bearing body, a pivot bearing of the storage section bar 3 in the direction S is formed around the center axis of the cylinder body of the retaining strip 2 by sliding abutment of said circular in cross section bearing surfaces.

The bearing recess of the stowage profile strip 3 engages over the holding strip 2 in a peripheral region of more than 180 °, the opening width between the recess edges of the stowage profile strip 3 being smaller than the circle diameter of the holding strip 2 . According to FIG. 1, the opening angle of the retaining profile strip bearing recess, which is related to the center axis of the retaining strip 2 , is approximately 110 °. This ensures that each opening edge of the Staupro filista bearing recess is pivotable into the area of the doctor element 6 . Nevertheless, the swivel range of the stowage profile strip 3 is relatively large at approximately 60 °.

At each opening edge of the stowage profile bearing stock recess a stowage surface 300 or 306 of the stowage profile strip 3 extending parallel and transversely to the doctor device along the longitudinal axis is formed. The two storage surfaces 300 and 306 are aligned with one another at an angle of approximately 90 °. In the pivoted position of the stowage profile strip 3 shown in FIG. 1, a storage space 301 for application substance 70 is formed in front of the doctor element 6 . Such an inlet gap for the substance 70 is limited to the application surface 19 either by this itself or by a patterning or coating template, which is provided in a known manner as a round template 17 or flat template 18 . By adjusting the swivel position of the stowage profile strip 3 , the size of the substance space 301 in front of the doctor element 6 can be controlled and adjusted. It is particularly advantageous that the doctor device 1 according to FIG. 1 can also be operated in the opposite working direction A. The storage surface 306 is then pivoted into a position in the area of the doctor element 6 .

As shown in Fig. 1, the two stowage profile surfaces 300 , 306 can be shaped differently. The storage surface 300 , as seen in cross section, is convexly curved, while the storage surface 306 is designed as a flat surface. Each opening edge of the storage profile bar-bearing recess forms an edge or surface 304 that is parallel to the squeegee longitudinal axis and also transversely to the circumference of the holding strip 2 . Such an edge can advantageously be used as a pivoting / tilting stop of the stowage profile strip 3 against the squeegee strip 5 or the squeegee element 6 . The pivoting position of the stowage profile strip 3 is changed and adjusted by an adjusting device connected to it. Such a device is described below by way of example with reference to FIGS. 7 and 8.

The pressure of the doctor element 6 against the order surface 19 or a template 17 , 18 can optionally with magnetic force, weight and / or by acting on the retaining strip 2 with a mechanical, for. B. pneumatically or hydraulically applied force. For this purpose, the holding device 480 is free shooting in a not shown in Fig. 1 coating machine in the direction H transversely to the application surface 19 loaded and slidably mounted. The holding device 480 can, however, also or additionally be freely and / or, if necessary, fixedly mounted so as to be pivotable about an axis parallel to the longitudinal axis of the doctoring device in a coating machine. When pressed by weight force, the mass of the holding strip 2 and / or the holding device 480 firmly connected to it is used. In addition, the weight of the stowage profile bar 3 seated on the holding bar 2 can be used for pressing. For pressing with mechanical force, the holding device 480 is subjected to force in the direction of the application surface 19 . For magnetic pressure, the support or underlay of the application surface 19 is designed as a flat or roller-shaped ( FIGS. 2 to 5) electromagnetic table 20 . At least parts of the holding bar 2 and / or the profile bar 3 and possibly also the cross plates 48 then consist of magnetizable material. The squeegee 5 or at least parts thereof can be formed from magnetically attractable material.

Embodiments of the invention according to FIGS. 2 to 8 have with respect to the pivot bearing of the stowage profile bar 3 on the retaining bar 2 and with regard to the measures associated with it with reference to FIG . Identical or corresponding parts are provided with the same reference numerals. Special design measures and modifications apparent from FIGS. 2 to 8 are described below.

According to FIGS. 2 to 6, the opening width between the recess edges of the vertical profile strip 3 , which is captively placed on the holding strip 2 , is only slightly smaller than the circular diameter of the holding strip 2 . This achieves an extraordinarily large pivoting range of the stowage profile strip 3 , the z. B. is 90 ° and more.

In Fig. 2, the retaining strip recess 30 is circular in cross section. In this recess 30 , a doctor roller 62 with an adapted circular cross section is loosely rotatably inserted about its axis. The Ausneh mungsränder the retaining strip recess 30 embrace the doctor roller 62 so far that it is held captive in the recess 30 .

Embodiments according to FIGS. 3 to 8 relate to a particularly advantageous design and arrangement of the doctor bar 5 in the Haltenleistenausnehmung 30th According to FIG. 3 to 8 in the circular cylindrical section bar 2 in the center a rectangular or U-shaped longitudinal recess 30 is formed, into which a member having a blade 6 in one part or multi-part doctor bar 5 is loosely inserted slidingly movable. The doctor blade 5 has a serpentine bending deformability explained with reference to FIGS . 9A to 9D. At least the squeegee according to Fig. 3 also consists of an easily deformable pressure-elastic material, its material characteristics and cross-sectional shape is selected and selected so that it with the squeegee element 6 and the strip recess 30 against the bottom of the holding loose longitudinal surface 7 one over the Working width has comparative pressure elasticity. It is essential that the squeegee bar 5 is dimensioned in cross-section so that it is free of attachment and jamming in the holding strip 30 recess 30 . In the squeegee strip 5 can be shown with a dashed line, a squeegee strip is used, which forms a doctor blade. Otherwise, the squeegee element 6 of a one-piece squeegee 5 z. B. round or pointed ( Fig. 5, 6, 8,). Furthermore, a circular doctor bar 6 can be expediently inserted into the doctor bar S, which either works as a doctor roller (FIGS . 4, 7), or is fixed to the doctor bar 5 to form a doctor blade coating element. A used in the squeegee 5 squeegee element 6 has at least approximately the same all-sided bending property ( Fig. 9A to 9D) as the squeegee body.

In FIG. 4 to 8 by the reference numeral 8 elastically formed pressure elements in the form of a profile strip or profile strip referred to. Such a pressure-elastic element 8 produces Rakelan pressure and / or is applied with this by the holding bar 2 . It causes over the total stretching length of the squeegee 1 or at least over the squeegee working width a uniform pressure distribution, so that straightness inaccuracies of the holding strips 2 and / or their storage are compensated and compensated for to a particularly high degree. The upper lateral squeegee strip surface 7 opposite the squeegee element 6 is provided for absorbing the force causing the squeegee contact pressure. Also in the designs of squeegee devices according to the invention with one or more pressure-elastic elements 8 , it is essential that the squeegee strip 5 is dimensioned in cross-section such that it is located in the holding strip recess 30 without any fastening and jamming.

It is pointed out that the squeegee strip 5 inserted in combination with one or more pressure-elastic elements 8 in the holding strip recess 30 does not necessarily have to consist of a pressure-elastic material, as in contrast in the exemplary embodiment according to FIG. 3. It is also essential in the embodiments according to FIGS . 4 to 8 that the squeegee strip 5 has the characteristic and bending characteristics explained below with reference to FIGS . 9A to 9D.

A squeegee device 1 according to the invention according to FIG. 6 comprises a holding strip 2 , the recess 30 of which is U-shaped in cross section. In this recess 30 , a pressure-elastic profile body 21 is inserted with a rectangular recess into which a squeegee bar 5 having a pointed doctor element 6 is inserted in a loose sliding manner. The web area of the druckela-elastic bar 21 forms as such a druckela-elastic element 8 , with an additional Druckela-elastic hollow body 8 '' being inserted. The elements 2 , 21 and 5 are positively but loosely together. Between the longitudinal surfaces of the squeegee strip 5 and the surfaces of the pressure-elastic strip 21 , sliding layers 290 can be expediently formed in order to provide the sliding mobility of the squeegee strip 5 to a large extent. Sliding surfaces 290 or elements 29 can also be formed between the holding strip from the recess wall and the pressure-elastic profile body 21 . Since the squeegee strip 5 is encompassed by the pressure-elastic body 21 on all longitudinal sides in the retaining strip recess 30 , a very pronounced mobility is ensured in all degrees of freedom transversely to the squeegee axis in the manner of a swimming movement. With the additional pressure-elastic element 8 '', the pressure-elastic support against the bottom of the retaining strip recess 30 can be particularly set. In particular, the hollow body 8 '' can be connected to a hydraulic or pneumatic pressure system in order to control the pressure elasticity in the web area of the pressure-elastic bar 21 . One of the type pressure control and / or possibly pressurization for pressing is also possible by means of the pressure-elastic body 8 in FIGS . 4, 5, 7 and 8. Also, a pressure-elastic element 8 can be used to move the squeegee strip 5 by a certain amount from the retaining strip recess 30 in the direction of the work surface 19 in order to free the squeegee strip 5 or the squeegee element 6 outside the squeegee strip recess 30 to a desired extent .

FIGS. 7 and 8 show embodiments for Einrich obligations for control and adjustment of the pivot position of the storage profiled strip 3. Also 7 and 8 special holding facilities for holding strip 2 go from FIG. Forth.

According to Fig. 7, each end plate 48 of the support means 480 fixed with an over the working width is erstrec kenden carrier beam 408 connected transversely slidably movable open towards the working surface 19 in an area to the working 19 U-recess 401 engages a bearing spar 400th The bearing spar 400 is part of an application machine, not shown. The supporting bar 408 engages under edge 402 are formed at the opening side of the recess 401 to slide out of the carrier spar to prevent 408 from the recess 401 to the working surface 19 towards.

Referring to FIG. 7, the pivoting movement, the Staupro filleiste 3 by a centrally schwenkbewegbar arranged on the support plate 48 with a lever 487 pens are senschlitz controlled and adjusted (by setting the lever 487). In this case, a pin 488 extending parallel to the longitudinal axis of the squeegee device is arranged in the center and end of the jam profile strip 3 . The pin 488 slidably engages in the link slot of the lever 487 open to the work surface 19 .

In Fig. 8 includes a bearing device 76 for the retaining bar 2 at the front end regions of the retaining bar 2 arranged fork brackets, each having a pair of fork arms 761 , 762 and the retaining bar 2 on the side facing the work surface 19 with an edge 53 slightly below. The end of the retaining strip 2 is thus captively located in an end bearing recess between the two arms 761 , 762 . The distance between the fork arms 761 , 762 , which extend perpendicular to the working surface 19 , is slightly larger than the cylinder diameter of the holding strip 2 . So this is in the area of its end faces under line or surface contact of its circular cylindrical peripheral surface 200 on the fork parts 761 , 762 rotatable (double arrow P) and also slidably held transverse to the work surface 19 . The fork-bearing device 76 is fixedly connected to a support beam 74 extending across the application width, which is also provided in the exemplary embodiment as a feed line for substance 70 . It is particularly expedient to mount the support bar 74 with a pivot bearing of an application machine, not shown, about an axis parallel to the longitudinal axis of the Rakelge and fixedly adjustable in the pivot position, in order in this way to obtain a further possibility for positioning the doctor device 1 . The pivoting movement of the retaining strip 2 can be controlled and adjusted by a lever 77 arranged pivotably in the middle on the web part 763 of the fork holder 76 with a link slot (by fixing the lever 77 ). The retaining strip 2 is centered and the end side fixedly connected to a holding / lever arm 51 which is provided at its free end with a pin which engages in the open to the application surface 19 of the lever guide slot 77th

Referring to FIG. 8 is the swivel control and -Feststel lung 76, a pivoting lever device provided the storage section bar 3 between this and the bearing device. A lever 302 is pivotally articulated on a part of the stowage profile strip 3 which projects to the right in FIG. 8 and which in turn is pivotally connected to a lever 303 which is pivotably mounted on the bearing device 76 about a lockable bolt screw.

In Fig. 8, the squeegee 5 is provided with a lateral recess into which a strip part 210 fastened on the end side of the holding bar 2 engages in order to hold the squeegee bar 5 captively in the holding bar recess 30 . Such a fuse element that z. B. can also be angeord net on the retaining strip recess opening, which engages under the doctor blade in a recess, can of course also be provided in the previously described exemplary embodiments of FIGS . 3 to 7, in order to prevent the retaining strip 5 from the retaining strip recess 30 when Lifting off the retaining bar 2 falls out.

Referring to Figs. 9A to 9D, the special Charak teristik is represented by metering bars 5 that the arrangements according to the invention and arrangements 3 underlie to 8 of FIG.. With the perspective view of the characteristic feature of the gege respectively in relation to the longitudinal axis of extension surrounded on all sides bendability (light deformability in all degrees of freedom) of a unitary doctor bar 9 to 5 (Fig. 9B) as well as functionally identical two parts together quantitative modifying the blade strips (Fig. 9A, 9 C, D (with special elements 6 )) are illustrated. According to a special embodiment of the invention, the squeegee bar 5, with a squeegee element 6 possibly inserted into it, has an unusual serpentine or whip-shaped curvature, deformation and bending characteristic in the manner of a serpentine, whip and / or belt-like element which extends for a long time. The squeegee strip 5 thus corresponds only to the cross-sectional representation of an element which is normally understood as a profile strip in mechanical engineering practice. The squeegee strip 5 according to FIG. 9B shows a whip-like squeegee strip 5 which is "highly flexible" according to this requirement. Two cross-sections are indicated by dashed lines along the length of the squeegee strip. To these cross sections vertically entered (imaginary) partial axes K show that the axis straightness important for a particularly large application precision of the squeegee for bearing against a processing surface due to the special design of the squeegee strip 5 is not from this and also not possibly used in it Rakelar beitselemente 6 results. Rather, in this design according to the invention, an essential basis of the invention is, with a deliberate avoidance of the conventional doctor constructions own constructions straightness axes, the doctor contact edge / contact surface or the doctor bar 5 with the doctor element 6 by a special material and dimensions Characteristics of the squeegee bar and by a special arrangement of the parts with each other with the lowest possible squeegee bar rigidity, ie with the greatest possible conformability to the squeegee work surface.

Fig. 9A shows a squeegee bar 5 , in which a stripe-shaped squeegee working element 6 is inserted. Fig. 9A is to illustrate that the squeegee 5 this Ausfüh approximate shape over its longitudinal extent has a slightly ge ringer bendability on all sides than the squeegee shown in Fig. 9B, which corresponds to those in Fig. 3, 5, 6 and 8. It is emphasized, however, that the all-round easy bendability of the squeegee strip according to FIG. 9A is provided so large that the essential whip- or serpentine-like shape and bendability is ensured for the design according to the invention. As shown in dashed lines in FIG. 3, a strip-shaped doctor element 6 can be inserted into the doctor bar 5 according to FIG. 9A.

According to FIG. 9C, a profile bar 62 with a circular cross-section is used as a squeegee working element in the squeegee strip 5 corresponding to FIGS . 4 and 7. Otherwise, the statements relating to FIG. 9A also apply here.

Fig. 9D shows in a similar to Fig. 9A to 9C Dar position several doctor blade profiles 5 with various cross-sectional shapes, partly without and partly with inserted doctor blade elements 6 , each lying on an imaginary surface. - The squeegee strips / elements shown by way of example in FIGS . 9A to 9D can optionally be provided instead of the squeegee strips / elements shown in the exemplary embodiments.

Claims (39)

1. Doctor device ( 1 ), comprising
a doctor element ( 6 ) which, under contact pressure, a substance ( 70 ) such as printing ink or coating agent on a transverse and relative to the doctor element ( 6 ) moving sheet-like element ( 19 ) such as a web, a sheet of material or other sheet-like structure such as applying a roller or a belt, and
a stowage profile strip ( 3 ) which has a stowage surface ( 300 ) influencing a substance storage space ( 301 ) in front of the squeegee element ( 6 ) and which has a stowage surface ( 300 ) about a parallel to the longitudinal axis of the squeegee device and extends over the working width parallel to the longitudinal axis of the squeegee device extending axis is pivotable, characterized in that
that the squeegee ( 1 ) comprises a holding length / pressure bar ( 2 ) with a longitudinal extension ( 30 ) over which the working width is parallel to the longitudinal axis of the squeegee and which comprises a squeegee element ( 6 ) provided with a squeegee bar ( 5 ) without a fixed connection is used with the retaining strip ( 2 ), the doctor element ( 6 ) protrudes over the working width of the Hal teleisten longitudinal recess ( 30 ), and that
a part of the circumference of the retaining strip (2) forms a bearing body for the storage profile strip (3) on which the storage profile strip (3) with a parallel to the squeegee device longitudinal axis extending storage profile afford recess is placed in such a way that the damming strip (3) to pivot about a body along the longitudinal axis of the retaining strip ( 2 ) and is slidably mounted in the pivoting direction, the pivoting position of the stowage profile strip ( 3 ) being changeable and permanently adjustable by an adjusting device ( 302 , 303 , 305 , 487 , 488 ) connected to it. 2. Squeegee device according to claim 1, characterized in that the squeegee ( 5 ) along the squeegee element ( 6 ) opposite the upper longitudinal side ( 7 ) resiliently against the bottom surface ( 4 ) of the retaining strip longitudinal recess ( 30 ) supported and against lateral Surfaces of the Haltelei most longitudinal recess ( 30 ) is guided. 3. Squeegee device according to claim 1 or 2, characterized in that at least the in the holding strip longitudinal recess ( 30 ) he stretching part of the squeegee ( 5 ) with respect to each squeegee cross section in all degrees of freedom is deformable and movable transversely to the longitudinal axis of the squeegee. 4. Squeegee device according to one of claims 1 to 3, characterized in that the retaining strip ( 2 ) and the squeegee strip ( 5 ) are at least slightly loosely displaceable relative to each other and free of jams in all degrees of freedom across the longitudinal axis of the squeegee device. 5. Squeegee device according to one of claims 1 to 4, characterized in that the holding strip ( 2 ) at least partially has a cross-section in the holding strip circular-convex, the bearing body contact surface for the stowage profile bar ( 3 ) forming surface. 6. Squeegee device according to one of claims 1 to 5, as by in that the retaining strip is a circular cylindrical profile strip (2) of which the storage profile strip (3) forms facing peripheral surface (200), the bearing body-contact surface for the storage profile strip (3). 7. Doctor device according to one of claims 1 to 6, characterized in that the recess of the stowage profile strip ( 3 ) is circular in cross section. 8. Doctor device according to one of claims 1 to 7, characterized in that the stowage profile bar ( 3 ) overlaps the holding / pressure bar ( 2 ) in a peripheral region of more than 180 °, in particular the opening width between the recess edges of the stowage profile bar ( 3 ) is slightly smaller than the circular diameter of the retaining / pressure bar ( 2 ). 9. Doctor device according to one of claims 1 to 8, characterized in that in the region of each opening edge of the stowage profile recesses a storage surface ( 300 , 306 ) parallel to the longitudinal axis of the doctor device is formed, preferably the two storage surfaces ( 300 , 306 ) below an angle of about 90 ° to each other are aligned ( Fig. 1). 10. Squeegee device according to one of claims 1 to 9, characterized in that the opening edges of the stowage profile recess recess are each provided with an edge or surface ( 304 ) which is parallel to the longitudinal axis of the squeegee device and transverse to the circumference of the holding / pressure bar ( 2 ) forms a stop against the squeegee bar ( 5 ) or its squeegee element ( 6 ) which is outstanding from the holding / pressing bar ( 2 ). 11. Squeegee device according to one of claims 1 to 10, characterized in that the opening width of the retaining strip recess ( 30 ) transverse to the longitudinal axis of the squeegee device is smaller than the cross-sectional dimensions of the retaining strip recess ( 30 ), the cross-sectional shape of the squeegee strip ( 5 ) being the cross section of the retaining strip recess ( 3 ) is adjusted. 12. Doctor device according to one of claims 1 to 11, characterized in that the holding strip ( 2 ) is firmly connected at its ends, in particular by screw connection with holding parts ( 48 ) of a holding device. 13. Squeegee device according to one of claims 1 to 11, characterized in that the holding strip ( 2 ) by means of a holding device ( 76 ) at its ends about one of its body longitudinal axes, in particular about its body longitudinal axis is pivotally / rotatably mounted. 14. Squeegee device according to claim 12 or 13, characterized in that the holding device is movable in the direction transverse and / or parallel to the application surface ( 19 ), in particular is pivotably mounted about an axis parallel to the longitudinal axis of the squeegee device. 15. Squeegee device according to one of claims 1 to 14, characterized in that the adjusting device connected to the stowage profile bar ( 3 ) for adjusting the pivoting position of the stowage profile bar ( 3 ) has a pivoting lever and / or Ku kiss guide ( 302 , 303 , 305 ; 487 , 488 ). 16. Squeegee device according to one of claims 1 to 15, characterized in that the squeegee ( 5 ) and the squeegee element ( 6 ) with respect to each cross section consist of an elastically bend-deformable mate rial on all sides, restoring forces due to inherent stiffness Doctor blade ( 5 ) are less than the smallest doctor pressure applied to the doctor blade ( 5 ). 17. Squeegee device according to one of claims 1 to 16, characterized in that the squeegee strip ( 5 ) at least in the region of its upper longitudinal side ( 7 ) consists of a resilient material, the pressure forces transversely to the application surface straightened evenly over the extension length of the Doctor blade ( 5 ) distributed. 18. Squeegee device according to one of claims 1 to 17, characterized in that the squeegee strip ( 5 ) at least in the region of its holding strip recess ( 30 ) laterally erstrec kenden long sides made of a elastically deformable ble material which is transverse to their Seitenli chen longitudinal sides directed pressure forces evenly over the extension length of the squeegee ( 5 ) ver. 19. Squeegee device according to one of claims 1 to 18, characterized in that between the lateral retaining strip recess surfaces and the squeegee strip ( 5 ) pressure-elastic layers or elements ( 21 ) are provided, which are directed transversely against the lateral longitudinal sides of the squeegee strip pressure forces Distribute evenly over their extension length. 20. Squeegee device according to one of claims 1 to 19, characterized in that in the holding strip recess ( 30 ) extending part of the squeegee strip ( 5 ) in a pressure-elastic transverse to its longitudinal extension, over the Haltelei most-recessed length extending Profilkör by ( 21 ) is used, the pressure forces directed against the longitudinal sides of the squeegee strip ( 5 ) are distributed uniformly over their length of extension ( FIG. 6). 21. Squeegee device according to one of claims 1 to 20, characterized in that in the holding strip recess ( 30 ) between the holding strip ( 2 ) and the squeegee element ( 6 ) opposite the upper longitudinal side ( 7 ) of the squeegee strip ( 5 ) at least one Bendable deformable and pressure-elastic, over the holding strip recess extending element ( 8 ) is arranged, the pressure forces exerted on the squeegee strip ( 5 ) evenly distributed over its length. 22. Squeegee device according to claim 21, characterized in that the pressure-elastic element ( 8 ) in the squeegee strip ( 5 ) is incorporated. 23. Doctor device according to claim 21 or 22, characterized in that the Druckelasti cal element ( 8 ) is a filled with a pressure fluid elastic hollow body such as a hose. 24. Doctor device according to one of claims 21 to 23, characterized in that the pressure-elastic element is a contact pressure generating element ( 8 ). 25. Squeegee device according to one of claims 1 to 24, characterized in that little least partially between the retaining strip Ausneh mungsflächen and the squeegee strip ( 5 ) on the holding strips-recess length and parallel to the longitudinal surfaces of the squeegee bar ( 5 ) extending a sliding lining or sliding element ( 29 , 290 ) is arranged. 26. Squeegee device according to claim 25, characterized in that a sliding surface is provided at least along one of the lateral squeegee strip sides, the surface sliding surface ( 290 ) of the squeegee strip ( 5 ) or by means of a sliding element ( 29 ) resting on the squeegee strip ( 5 ) forms is. 27. Squeegee device according to claim 25 or 26, characterized in that at least partially on the holding slat recess surfaces is provided a sliding surface covering as Oberflächengleit (290) of the holding slat recess surface or by means of a voltage applied to the holding slat recess surfaces sliding member (290) is trained. 28. Squeegee device according to one of claims 1 to 27, characterized in that the retaining strip recess ( 30 ) is quite angular in cross-section, U-shaped or circular and that the cross section of the squeegee strip ( 5 ) is at least partially matched to the inner shape of the retaining strip. Recess is adjusted and extended in alignment with this. 29. Squeegee device according to one of claims 1 to 28, characterized in that the retaining strip recess ( 30 ) with a squeegee strip ( 5 ) captive in the retaining strip recess ( 30 ) holding, in a recess of the squeegee strip ( 5 ) engaging stop is provided. 30. Doctor device according to one of claims 1 to 29, characterized in that the doctor element ( 6 ) has at least one rounded or pointed working edge. 31. Squeegee device according to one of claims 1 to 30, characterized in that the squeegee strip ( 5 ) is integrally formed with a squeegee element ( 6 ) molded onto it. 32. Squeegee device according to one of claims 1 to 31, characterized in that the squeegee strip ( 5 ) at least in two parts with at least one in the holding strip recess ( 30 ) a part (squeegee strip body) of the squeegee strip ( 5 ) attached or in this used, lei most, strip or round rod-shaped doctor element ( 6 ) is formed, which has at least approximately the same all-round bending property as the Rakellei most body. 33. Squeegee device according to claim 32, characterized in that the squeegee element ( 6 ) is provided as in a longitudinal recess of the squeegee strip ( 5 ) to ordered doctor blade with a small cross-section compared to the profile cross section of the squeegee bar body. 34. Squeegee device according to claim 32 or 33, characterized in that the squeegee element ( 6 ) in the direction transverse to the work surface is inserted in the squeegee bar ( 5 ). 35. Squeegee device according to one of claims 1 to 34, as extending through in that the Halteleistenausnehmung (30) or inclined perpendicularly eccentrically in the retaining strip (2) to the contract area (19). 35. Doctor device according to one of claims 1 to 35, characterized in that the doctor bar ( 5 ) and optionally the doctor element ( 6 ) consist of plastic material. 37. Squeegee device according to one of claims 1 to 36, characterized in that the holding strip ( 2 ) is provided as a pressure strip which generates contact pressure under gravity. 38. Squeegee device according to one of claims 1 to 37, characterized in that the holding strip ( 2 ) consists at least partially of magnetisable material, so that it is arranged on a magnet bar or table ( 20 ) arranged on the other side of the application surface Pressing the Rakellei ste ( 5 ) in the direction of the application surface with magnetic force can be applied. 39. Doctor device according to one of claims 1 to 38, characterized in that the doctor device ( 1 ) is part of a device for applying substances ( 70 ) with a flat or cylindrical template between the doctor element ( 6 ) and an application surface ( 19 ) .