EP0701022B1 - Coating machine for applying directly or indirectly a fluid or pasty material onto a moving web - Google Patents

Abstract

Coating machine for the direct or indirect application of fluid or pasty medium (6) to a running web, esp. paper or cardboard, has a dosing slot (4) to form an impulse jet between a discharge lip (3) and a lip (2) near the application point and an adjuster (20-25) which is set in zones along the machine length for adjusting the distance of the application point lip from the discharge lip.

Description

The invention relates to a commissioned work for direct or indirect application of a liquid or pasty medium a running material web, in particular made of paper or Carton.

Commissioned works are known in which between two lips a metering gap is formed, which acts as a free jet nozzle. Such orders are based on the training of a through the surrounding atmosphere free jet of the liquid or pasty medium also as "fountain jet flow Applicator ". This means that the liquid or pasty Medium directly or indirectly on a running material web applied.

With these application works, the liquid or pasty Medium via a color distribution tube that is located within a the length of the order extending bar arranged is fed. The medium passes through the paint distribution tube Through openings in an equalization room and flows from there via a feed gap to the metering gap, from which the liquid or pasty medium then in the form of a free Beam emerges. One runs when the medium is applied directly Material web past the free jet nozzle and is directly with the free jet of the liquid or pasty medium acted upon. The material web can, for example, on the surface of a roller. In the indirect Applying the medium, the free jet is first applied to the Surface of an applicator roller applied to in from there a nip through which the material web runs, transferred from the application roller to the material web become. That lip of the two forming the metering gap Lips, which is on the side of the metering gap on which the indirect application of the medium the application roller or at direct application of the medium to the material web Commissioned work is referred to as the inlet lip. Accordingly, the second lip on the side of the Dosing gap is on which the applicator roller or Material web runs away from the commissioned work as the outlet side Inscribed lip.

Traditional is the case of commissioned works from the previously described Type an adjustment device on the drain-side lip provided with which the drain-side lip over the length of the Application work in zones at a distance from the inlet side Lip is adjustable. This setting of the metering gap takes place at standstill of the commissioned work and thus the associated coating system to a specific cross section of the liquid or pasty applied to the material web To achieve medium. The adjustment device is at conventional commissions are difficult to access because in generally the free jet commissioned work Fine metering device is connected downstream by means of a Doctor element, e.g. a doctor blade, the applied liquid or pasty medium on the desired cross profile scrapes off. Furthermore, the lip between the drain Order and the fine metering device a collecting trough arranged to remove excess liquid or pasty medium, that from the commissioning plant or from the fine metering device expires to collect. Because of these conditions and the Operation of liquid or pasty materials running on the application unit Medium can with such conventional commissioned works Column setting not made during operation become.

An extrusion applicator is known from US-A-4984533, which has an extruder head seen in cross section essentially two opposite plate-like Parts that have a circular between them, in a lower area of the extruder head Distribution room for the extruded application medium and one adjoining, extending upwards Define extruder slot. In the exit area of the Extruder slot are the two plate-like parts on theirs Outside beveled, so that there is a kind of lip forms. The material web to be coated runs on this Extrusion application directly over the lips of the Extruder head away, and the extruder head is during the Extrusion pressed against the material web, so that the application medium exiting the extruder head flat on the Material web is extruded. The drain-side lip of the Extruder head also takes on the function of a Doctor element, which wipes the extruded medium. By an attacking lip on the outlet side Adjustment mechanism is the lip on the outlet side lip on the inlet side or pivotable away from it. One formed by the circular distribution space Thin point serves as a pivot axis. Such one Extrusion commissioned work is not the subject of the present Invention.

The invention is based on the technical problem a commissioned work of the type described at the beginning Gap setting of the metering gap even while the meter is running To be able to make operations.

According to the invention, this technical problem is solved by one Commissioned work with the features of claim 1 and a commissioned work with the characteristics of the subordinate Claim 15 solved.

In the solution according to the invention there is an adjustment device provided with the lip on the inlet side at a distance to the lip on the outlet side is adjustable. Here is this Distance, seen along the length of the application, in zones differently adjustable, for example local Compensate for manufacturing inaccuracies or a cross profile of the applied liquid or pasty medium realize that differently in some areas is, e.g. flattened at the edges of the material web. Of course, a preset of the whole is over the length of the metering gap possible.

With this solution, in which the adjusting device on the The supply side of the application can be arranged, the Gap setting even during operation be made because of the accessibility of the Adjustment device not by a drain side Fine metering device or one located on the outlet side Gutter is affected. Furthermore, the solution according to the invention an operation of Adjustment device not through liquid or draining pasty medium hampers, since this is located in the outlet side Area of the commissioned work is collected. Through the Possibility of column adjustment during the current Operation can occur immediately during operation Changes in the cross profile of the applied medium reacts and the costs of operating the coating system can can be reduced because longer downtimes for one Column setting in the order work can be avoided.

In favorable embodiments of the invention, the to and lips on the outlet side to limit the metering gap Have surface sections that are either straight or curved run. So it can be the surface sections of both lips each be straight or curved. About that In addition, one of the two lips can extend beyond its free end the other lip also extends to be extended this extended section a curved deflecting surface for to form the liquid or pasty medium to be applied. In particular, it is preferred that the inlet lip on its free end has a concave deflection surface for the has liquid or pasty medium. In principle, one such deflection surface, however, also be convexly curved, or that Free end of one lip can be considered a straight one Guide surface section over the free end of the second lip be led out.

In a preferred embodiment, the inlet side Lip shaped like a comb. In other words, the lip on the inlet side has a web running along its length on, of which processes are distributed over the length or Extend protrusions. With such a design lip when forces are applied over the extensions or protrusions can be deformed more easily and thus can be easily implement a different column setting in zones.

In an advantageous embodiment of the invention lip on the inlet side by the adjustment device in zones rotationally around a parallel to the longitudinal axis of the lip moving axis movable. In other words, the Lip in sections around this parallel to its longitudinal axis Swivel the axis in this way by swiveling the Lip to drain lip to reduce the metering gap or by swiveling away from the drain lip To increase the metering gap.

In another cheap embodiment, the lip on the inlet side by the adjustment device in zones translationally in a transverse to the level of the metering gap moving direction. That means that lip on the inlet side in sections to the lip on the outlet side can be moved towards or away from this to the Reduce or enlarge the metering gap accordingly.

In an expedient embodiment, the Adjustment device a mechanical adjustment mechanism on. Such a mechanical adjustment mechanism can diverse ways, for example using Set screws, levers and the like. A preferred embodiment of the mechanical Adjustment mechanism is a number of over the The length of the applicator is distributed adjusting screws to be provided, each directly or indirectly on the bar support the application unit and in thread engagement with the lip on the inlet side, with the adjusting screws Spring elements are biased. Thus, by rotating the Adjusting the lip on the inlet side of the outlet lip are pulled away or swung away or be pushed or pivoted towards this. By Operation of individual adjustment screws can be local Gap adjustment can be made while at even Actuation of all adjusting screws a total setting of Dosing gap made over the length of the application can be. By preloading the adjustment screws always ensures that a stable and play-free Column setting is present.

Another advantageous embodiment of the mechanical Adjustment mechanism is a lever arm assembly to be provided over actuators over the length of the Order work are distributed, bending forces in the inlet side Lip initiates to by means of the resulting Bending deformations adjust the metering gap zone by zone. How in the previously described embodiment, here too Actuation of individual actuators for the local application of Bending forces on the inlet lip using the Lever arm arrangement made a zone-wise gap adjustment be, and can also when actuating all actuators Total gap setting over the length of the application work be performed.

Further advantageous embodiments of the adjustment device consist of a thermal, hydraulic, pneumatic, magnetic, magnetostrictive or to provide piezoelectric adjustment mechanism. Such Adjustment mechanisms can be constructive in their Design can be realized in many ways, whereby also combinations of the adjustment mechanism operating principles with each other or combinations of these adjustment mechanism operating principles with mechanical adjustment mechanisms can be executed.

In an expedient embodiment of the invention Zone-wise actuation of the servomotor adjustment device intended. This makes the adjustment process easier because the Actuators, e.g. Adjusting screws or the like, not have to be operated more by hand.

In a preferred embodiment, the Adjustment device can be operated remotely. This Embodiment of the invention is precisely with regard to a Gap setting advantageous during ongoing operation, since the control of the adjustment device then on the one hand can be done centrally and on the other one control-related linkage of the adjustment device with other components of the coating system is made possible. In particular, it is advantageous to use the remote-controlled zones Control of the adjustment device in an automatic Include control loop, which is based on measured values of the Cross profile of the applied liquid or pasty medium adjusts the adjustment device. In this embodiment is therefore the column setting during the operation of the Automated coating system, making the fastest possible Adaptation of the commissioned work to changed conditions or There are irregularities during operation and so the Quality of the final product is improved.

Equipping the adjustment device with automatic actuatable actuators or actuators is at conventional orders with an adjustment device for the drain-side lip is practically not possible because there due to the immediate back of the lip arranged gutter and due to the downstream Fine metering device insufficient space for Housing such aggregates is available.

In a further advantageous embodiment of the invention is in addition to the adjustment device for the inlet side Lippe a second adjustment device for the drain side Lip provided with which the drain lip on the Length of the work in zones at a distance from it inlet lip is adjustable. This second Adjustment device can, as far as the spatial Allow circumstances, in one of the previous in Connection with the adjustment device for the inlet side Lippe explained embodiments can be executed. It is preferred, the adjustment device for the inlet side Lip for fine adjustment of the metering gap and the additional adjustment device for the drain-side lip for a rough adjustment of the metering gap. The The total gap width can then be preset via the Adjustment device for the drain lip in conventionally when the coating system is at a standstill done while the sectional fine adjustment is also during operation by adjusting the adjustment device for the lip on the inlet side can be made.

In the solution according to the invention according to the subordinate Claim 15 are relatively large forces in the Transferable column setting. Furthermore, the Adjustment of the gap width of the metering gap free of play, exactly and very sensitive. The column setting is very simple and in the column setting there are changes in angle compensable, i.e. inadmissible deformations of the Adjustment spindles can be avoided.

In an advantageous embodiment of the invention Actuator a nut on a threaded part of the Adjustment spindle is arranged and with which the inlet side Lip in its distance to the lip on the outlet side and thus the Width of the metering gap is adjustable.

The adjusting spindle is preferably a spring element assigned. It is advantageous that the spring element supports a stationary component and the adjusting spindle in Direction of "closing" or "opening" the metering gap acted upon.

In a preferred embodiment, each Adjustment spindle on a bending point. It is advantageous the bending point in the form of a leaf spring-like thin spot educated.

It is preferred that the broad side of the leaf spring-like Thin point along the horizontal axis of the adjustment spindle runs, the thin point about a parallel to the longitudinal axis the axis of the application is elastically deformable.

The spring element is preferably provided with a preload nut preloadable.

Exemplary embodiments of the invention will now be described explained in more detail with reference to the accompanying figures.

Fig. 1

eine schematisierte Querschnittsdarstellung eines ersten Ausführungsbeispiels des erfindungsgemäßen Auftragswerks;

Fig. 2

eine schematisierte Querschnittsdarstellung eines zweiten Ausführungsbeispiels des erfindungsgemäßen Auftragswerks;

Fig. 3

eine schematisierte Querschnittsdarstellung eines dritten Ausführungsbeispiels des erfindungsgemäßen Auftragswerks;

Fig. 4

einen Ausschnitt einer teilweise geschnittenen Draufsicht in Richtung des Pfeils A auf die zulaufseitige Lippe und die zugehörige Verstelleinrichtung in Fig. 3;

Fig. 5

eine schematisierte Querschnittsdarstellung eines vierten Ausführungsbeispieles des erfindungsgemäßen Auftragswerkes;

Fig. 6

einen Ausschnitt auf die Draufsicht des in Fig. 5 dargestellten vierten Ausführungsbeispieles des erfindungsgemäßen Auftragswerkes;

Fig. 7

eine schematisierte Querschnittsdarstellung eines fünften Ausführungsbeispieles des erfindungsgemäßen Auftragswerkes.

Show it:

Fig. 1

a schematic cross-sectional view of a first embodiment of the application unit according to the invention;

Fig. 2

a schematic cross-sectional view of a second embodiment of the application unit according to the invention;

Fig. 3

a schematic cross-sectional view of a third embodiment of the application unit according to the invention;

Fig. 4

a section of a partially sectioned plan view in the direction of arrow A on the inlet lip and the associated adjustment device in Fig. 3;

Fig. 5

a schematic cross-sectional view of a fourth embodiment of the application work according to the invention;

Fig. 6

a detail of the top view of the fourth embodiment of the application work according to the invention shown in FIG. 5;

Fig. 7

a schematic cross-sectional view of a fifth embodiment of the application work according to the invention.

As shown in Fig. 1, comprises a first embodiment of the order work 1 a bar 10, which extends over the entire Length of the commissioned work extends. In the bar 10 is a Distribution tube 9 for the liquid or pasty to be applied Medium formed, usually as a paint distribution pipe referred to as. This is followed by Through openings 12 connected, a compensation room 8 on, which continues in a feed channel 7. The feed channel 7 opens into a metering gap 4 which is between a lip 2 on the inlet side and a lip 3 on the outlet side is formed. At the free end of the inlet lip 2, the itself beyond the free end of the lip 3 on the outlet side extends, is a concavely curved deflection surface 5 educated. The liquid or pasty medium is indicated by arrows 6 indicated.

The application unit 1 is opposite an application roller 13 for an indirect order of the medium to be applied. The Direction of rotation of the application roller 13 is by an arrow clarifies. As can be seen from the drawing, the lip 2 on the inlet side on the side of the metering gap 4 who arrives the application roller 13, that is, while the drain-side lip 3 on the opposite side of the Dosing gap is on the application roller 13 from Dosing gap runs away, i.e. runs out.

In this application unit 1, the liquid or pasty Medium 6 is first supplied via the paint distribution pipe 9, then passes into the compensation chamber 8 and flows through the Feed channel 7 to the metering gap 4, from which the medium is then in a free jet (not shown) emerges, whereby by the concavely curved deflection surface 5 of the lip 2 on the inlet side a deflection of the application jet in the direction of the tangent the application roller 13 takes place. The liquid or pasty medium 6 is in the form of this free jet on the surface of the Application roller 13 applied and then after passing one downstream fine metering device (not shown), where the applied medium for setting a predetermined cross profile is scraped off, a nip fed through which a web of paper or cardboard, possibly also made of a textile material that runs there the liquid or pasty medium from the application roller 13 decreases.

The embodiment is both with a Adjustment device for the inlet lip 2 as well an adjustment device for the drain-side lip 3 fitted.

The adjustment device for the drain-side lip 3 is in formed in a manner known per se, the outlet side Lip 3 has a thin point 14. The thin section 14 corresponds to an articulated connection and allows one Swiveling the above the thin point in the drawing located section of the drain-side lip 3 within of a certain pivoting range, the pivoting around one running through the thin point 14 and to the longitudinal axis of the beam 10 parallel axis. A front wall 11, with the drain-side lip 3 on her in the drawing section below the thin section is firmly connected is rigidly fixed in operation, but it is required can be folded down about a joint 15, e.g. for cleaning purposes. The Back of the front wall 11 is as a drain surface 16 for excess liquid or pasty medium is formed. in the in the drawing, the area located above the thin point 14 are distributed over the length of the commissioned work Set screws 17 arranged with their head on the Support the rear of the front wall 11 and engage in thread with the pivotable section of the drain-side lip 3 stand. Furthermore, the length of the Stopper screws 18 distributed over the application unit provided which is in threaded engagement with the front wall 11 stand and with their bolt end on the swiveling section support lip 3 on the outlet side. Finally there is a cover 19 on the back of the front wall 11 arranged, which protects the adjusting device and as Drainage surface for excess medium 6 is used.

By turning the set screws 17 in the corresponding The direction of the upper section of the drawing drain-side lip 3 either around the thin point 14 lip 2 on the inlet side or pivoted away from it become. Depending on whether only individual or all adjusting screws 17 are operated, you reach localized Gap adjustments or an overall setting of the gap via the length of the commission. By pressing the Stop screws 18 ensure that the pivotable section of the drain lip 3 and the Front wall 11 are clamped against each other, so that a clearance-free column setting is available. To carry out the Column setting using the previously described Adjustment mechanism for the lip 3 on the drain side Coating system are at a standstill, otherwise the positioning and Stop screws would not be accessible. Because at the Front wall 11 is a (not shown) collecting trough arranged the area between commissioned work 1 and one (also not shown) downstream metering device blocked. In addition, unnecessary flows during operation medium 6 to be applied via the cover 19 and the Drainage area 16 from, so that access to the adjustment device is blocked.

The adjustment device for the lip 2 on the inlet side explained. On the bar 10 is a two-piece flange 20 fixedly arranged with Through bores 21 for receiving adjusting screws 22 is provided. The adjustment screws 22 are on the Longitudinal extension of the bar 10 is distributed. With a Collar 23 the adjusting screws are supported on the flange element 20 as it engages with its free bolt end with lip 2 on the inlet side. With a compression spring 24 around the free bolt area of each adjusting screw 22 is arranged around, the flange member 20 and the lip 2 on the inlet side stretched apart. The inlet side Lip 2 is provided with a thin point 25 so that the in section above the thin section this lip is pivotable about a certain area. The inlet side lip 2 is on her in the drawing section located below the thin point 25 by means of Fastening screws 26 attached to the beam 10.

By turning individual or all adjusting screws 22 local sections of the inlet lip 2 or the whole lip 2 on the inlet side either from lip 3 on the outlet side away or pivoted towards this, the pivoting around one running through the thin point 25 and to the longitudinal axis of the beam 10 parallel axis.

The adjustment device for the drain-side lip 3 is for the rough setting of the gap width of the metering gap 4 provided while the adjustment device for the lip 2 on the inlet side of a fine adjustment of the gap width of the Dosing gap 4 is used. The adjusting screws 22 are included a fine thread that allows precise fine adjustment allowed. Due to the biasing action of the compression springs 24, the alternatively e.g. can also be designed as disc springs, is always a stable and play-free adjustment of the lip 2 on the inlet side guaranteed.

In the second embodiment shown in Fig. 2 are the same or corresponding components of the Commissioned work with the same reference numbers as for the first Embodiment provided so that with respect to this Components on the description of the first Reference is made to the exemplary embodiment. Also regarding the Operation of this commissioned work is based on the explanations referred to the first embodiment.

In contrast to the first embodiment, the lip 3 on the outlet side no adjustment device for Adjustment of this lip is provided, and the lip 3 is over connecting screws 27 shown only schematically firmly connected to the front wall 11. Therefore, the lip 3 on the outlet side also no thin spot as in the first Embodiment on.

Below is the adjustment device for the inlet side Lip 2 explained. The design of the inlet lip 2 with a thin point 25 that swivels the lip into a Section and a via fastening screws 26 with the Divided bar 10 firmly connected section corresponds to essential to the first embodiment. Over the length of the application mechanism, lever arms 28 are arranged, which by means of fastening screws 29 firmly with the inlet side Lip 2 are connected. The lip 2 on the inlet side opposite ends of the lever arms 28 are with joint heads 30 fitted. The rod ends 30 are each rigid on one on the beam 10 attached bolts 31 pushed held there between two nuts 32 each. The Screw nuts 32 each point on the joint head 30 facing end face a spherical cap-shaped surface on. This surface hugs one another Spherical cap matching socket on the front of the Rod head 30 on. After a through hole 33 each Ball head 30 has a larger inner diameter than that Outer diameter of the rigid bolt 31, the joint head 30 with respect to the bolt 31 in a certain range be pivoted without bending forces on the bolt transfer. The two nuts 32 on each bolt 31 are additionally secured by a lock nut 34.

In contrast to the first embodiment, in which one Adjustment device for the drain lip Coarse adjustment of the metering gap and an adjustment device for the inlet lip for fine adjustment of the Dosing gap are provided, now takes over Adjustment device for the inlet lip 2 the entire Column setting function. The adjustment device for the inlet lip according to the first embodiment only smaller adjustment paths, otherwise the adjusting screws 22 at the entry into the threaded holes of the inlet lip 2 would experience an improper bend. For one However, the fine adjustment of the metering gap are feasible adjustment paths completely sufficient. Because in the second Embodiment realized much larger adjustment paths is an articulated connection between the rigid lever arms 28 and the rigid pin 31 trained so that when pivoting the lip 2 on the inlet side Lever arm 28 no undue bends in the bolt cause. Otherwise, the column setting is carried out analogously to Adjustment device for the inlet lip at the first Embodiment. To swivel the in the Drawing upper section of the lip 2 on the inlet side cause one or more lever arms 28 by means of Screw nuts 32 along the longitudinal axis of the bolt 31 transferred. The rigid lever arms 28 then transmit the Displacement along the bolt 31 in a pivoting of the inlet lip 2.

Also in the third shown in Fig. 3 Embodiment will be the same or corresponding Components with the same reference numerals as in the first Designated embodiment, so that here too of these components and the way the order works refer to the comments on the first embodiment becomes.

Then the adjustment device for the lip 2 on the inlet side explained. As can be seen from Fig. 4 the lip 2 on the inlet side is comb-shaped, i.e. it consists of a web 35, which extends over the length of the application unit 1 extends, and over the length of the web distributed processes 36. The individual processes 36 are each displaceable in the direction of their longitudinal axis 37 guided in a flange element 20 which is fixed to the beam 10 connected is. The flange element 20 is with Through holes 21 provided through each Adjusting screws 22 are guided. Just like the first In the exemplary embodiment, the flange element 20 is fixed from two interconnected sub-elements formed a bundle 23 each adjusting screw 22 enclose so that this Supports the collar against the flange element. To manage the Extensions 36 of the inlet lip 2 are Guide recesses 38 formed in the flange element 20, in each of these guide recesses Adjusting screws 22 surrounding compression springs 24 are used, which the extensions 36 and the flange member 20th spread apart. The inlet lip 2 is also over an elastic connecting bar 39 with the beam 10 connected.

Analogous to the first exemplary embodiment, turning takes place the adjusting screws 22 in the corresponding direction Gap enlargement or reduction, but with present third embodiment the inlet side Lip 2 locally or overall translationally in the direction of respective longitudinal axis 37 of the extension 36 is shifted. Through the elastic connecting bar 39 is there ensures that a continuous boundary wall of the Feed channel 7 is maintained. After doing this Adjustment device on the adjusting screws 22, on Flange element 20 and none on the inlet lip 2 Bending forces can also have relatively large adjustment ranges will be realized. The compression springs 24, as in the first Embodiment also as disc springs or the like can be trained, provide a stable and play-free Column setting sure.

As shown in Fig. 5, according to a fourth Embodiment the applicator 1 a support device, which is executed here in the form of a bar 10. The bar 10 extends over the entire length of the commissioned work. In the bar 10 is a distribution pipe 9 for the to be applied liquid or pasty medium formed, which is usually is referred to as a color distribution pipe. This follows connected via passage openings 12, an equalizing space 8 that continues in a feed channel. The feed channel 7 opens into a metering gap 4 which is between a lip 2 on the inlet side and a lip 3 on the outlet side is formed. At the free end of the inlet lip 2, the itself beyond the free end of the lip 3 on the outlet side extends, is a concavely curved deflection surface 5 educated. The liquid or pasty medium is indicated by arrows 6 indicated.

The applicator 1 is a roller 13 (i.e. one Application roller for an indirect application of the to be applied Medium or support roller wrapped around the material web direct order). The direction of rotation of the roller 13 is indicated by an arrow. As from FIG. 5 can be seen, the inlet lip 2 is on the side of the metering gap 4, on which a point on the surface of the Roller 13 arrives at the metering gap, that is to say runs in. The lip 3 on the outlet side, on the other hand, lies on the opposite one Side of the metering gap on which the said point on the Surface of the roller 13 runs away from the metering gap, that is expires.

In this application unit 1, the liquid or pasty Medium 6 is first supplied via the paint distribution pipe 9, then passes into the compensation chamber 8 and flows through the Feed channel 7 to the metering gap 4, from which the medium is then in a free jet, not shown, emerges. This is done through the concavely curved deflecting surface 5 of the inlet side Lip 2 deflects the application jet towards one tangent to the roller 13. The liquid or pasty Medium 6 is in the form of this free jet on the surface the roller 13 or applied directly to the material web. It is usually followed by a not shown downstream fine metering device to a correct one Streaked weight.

The applicator 1 is both with an adjustment device for the inlet lip 2 as well as with a Adjustment device for the drain lip 3 fitted. The adjustment device for the outlet side Lip 3 has already been linked to previous ones Exemplary embodiments explained, so that in this regard to the is referred to there.

The adjustment device for the lip 2 on the inlet side explained. On the bar 10 is a Length of the beam 10 extending component 20 stationary arranged, which with through holes 28 for receiving is provided by adjusting spindles 22. The adjusting spindles 22 are about the longitudinal extent of the bar 10 and Component 20 arranged distributed, as shown in Figure 6 is.

At one end of the adjustment spindles, these are with the lip 2 on the inlet side firmly connected and against Twist secured. The anti-rotation device can, for example with one not shown separately in the drawing Lock nut or otherwise, e.g. by gluing.

In front of this end of the adjusting spindle 22 which engages in the lip 2 on the inlet side, the latter can be provided with a bending point 21 which is advantageously made in the form of a leaf spring-like thin point.
This bending point 21 lies in one plane with the axis of the adjusting spindle 22. The width of the bending or thin point should correspond approximately to the diameter of the adjusting spindle, as can be seen in FIG. 6 of the top view of the application mechanism, or can even be made somewhat wider his. Since this thin point is therefore wide and, due to its leaf spring-like small thickness, has only a low bending stiffness, it can thus be elastically deformed about an axis 27 running parallel to the longitudinal axis of the application unit 1. This offers the advantage, on the one hand, that a type of joint is created with the bending point 21, which (when adjusting the lip 2) permits an essentially resistance-free change in the angle between the lip 2 and the axis of the adjusting spindle 22 (mounted in the stationary component) . On the other hand, there is a large cross-sectional area in the leaf spring-like thin area, which is suitable for transmitting higher forces than previously when adjusting the gap to the lip 2 on the inlet side. This is particularly advantageous if the lip 2 on the inlet side is made of a relatively rigid material.

Of course, like a fifth performance example 7 shows, the adjusting spindle 22 without Bend be made. That makes sense where the lip 2 on the inlet side represents a less rigid strip and there for the profiling of the gap 4 less forces are transferred.

The adjusting spindle 22 also takes only a schematic illustrated spring element 24, which is preferably made of Disc springs exist.

By means of a preload nut 23 and a pressure piece 25 can the spring element 24 can be tensioned against the component 20, whereby a freely selectable preload of the spring element is adjustable independently of the gap adjustment.

The adjusting spindle 22 is relative to the supporting beam 10 by means of an adjusting device 26 adjustable in the axial direction. As Actuator can be on the other end of the Adjustment spindle 22 screwed nut 26 are used. The nut 26 acts from the opposite side (i.e. opposite to lip 2) on component 20. The component 20 can e.g. as seen in Fig. 5, as one on the Beam 10 fixed angle to be executed. But it can also one welded onto the beam 10, for example Be ledge, as can be seen from FIG. 7.

When the adjusting nut 26 is tightened, the spring element 24 compressed. The lip 2 is thereby increased by the amount the spring assembly is compressed, withdrawn and the metering gap 4 is thus enlarged. Has the adjustment spindle 22, as shown in FIGS. 5 and 6, a thin spot, due to its elasticity, this is easy Bending deformation around the axis 27, making inadmissible Deformations of the spindle 22 can be avoided.

When the nut 26 is loosened, the spring element 24 relaxes. The lip on the inlet side is the amount by which this is Spring element relaxed under its pretension, again back and thus reduces the metering gap 4. With others Words said, the adjusting spindle 22 is in the direction "Close" of the metering gap 4 is applied. At The presence of the elastic thin spot 21 is experienced again a slight bending deformation, but in the opposite direction or in their starting position.

So that the inlet lip 2 can be adjusted, it is with a thin point 30, which can also be a joint, Mistake. The one in the drawing above the thin section located section of this lip is around a certain one The area can thus be swiveled. Using fastening screws 31 the lip 2 is attached to the beam 10.

By tightening or loosening the Nut 26 of a single or all adjusting spindles 22 are local sections of the inlet lip 2 or the entire lip 2 on the inlet side either from the outlet side Lip 3 away or pivoted towards this.

The same effect is also with a reversed arrangement of the Preload nut 23 and adjusting nut 26 reachable. At In this variant, there is the nut 23 with the pressure piece 25 at the free end of the adjusting spindle 25. Between the pressure piece 25 and the fixed component 20 is again the spring element 24 arranged. The adjusting nut 26 acts against the component 20, which now faces lip 2 in this variant.

The adjustment for the drain-side lip 3 is for the Elimination of manufacturing-related tolerances of the gap width the metering gap 4 provided, whereas the Adjustment device for the inlet lip 2 of the Profiling the gap width of the metering gap 4 is used.

The adjusting spindles 22 are therefore with a fine thread provided, which allows a precise fine adjustment.

With the device according to the fourth and fifth embodiment is a backlash and still more sensitive adjustment of the lip on the inlet side feasible than in the solution according to FIG. 1. In addition, compensation of changes in angle during adjustment take place, whereby the adjusting spindles less on bending be claimed.

Claims (22)

1. Applicator unit for directly or indirectly applying a liquid or pasty medium (6) to a moving material web, in particular consisting of paper or cardboard, with

   a metering gap (4) which is designed as a free-jet nozzle and is formed between an inflow-side lip (2) and an outflow-side lip (3), and

   an adjusting device (20-25; 28-34), by means of which the distance between the inflow-side lip (2) and the outflow-side lip (3) is capable of being set in zones over the length of the applicator unit (1) .
2. Applicator unit according to Claim 1, characterized in that the inflow-side lip (2) has, at its free end, a concavely curved deflecting surface (5) for the liquid or pasty medium (6).
3. Applicator unit according to Claim 1 or 2, characterized in that the inflow-side lip (2) has a comb-like design (35, 36).
4. Applicator unit according to one of Claims 1 to 3, characterized in that the inflow-side lip (2) is capable of being moved by means of the adjusting device in zones in rotation about an axis (25) running parallel to the longitudinal axis of the applicator unit (1).
5. Applicator unit according to one of Claims 1 to 3, characterized in that the inflow-side lip (2) is capable of being moved by means of the adjusting device in zones in translation in a direction (37) running transversely to the plane of the metering gap (4).
6. Applicator unit according to one of Claims 1 to 5, characterized in that the adjusting device (20-25; 28-34) has a mechanical adjusting mechanism.
7. Applicator unit according to Claim 6, characterized in that the mechanical adjusting mechanism has a number of adjusting screws (22) which are arranged so as to be distributed over the length of the applicator unit (1) and which are in each case supported directly or indirectly on a beam (10) of the applicator unit and are in thread engagement with the inflow-side lip (2), the adjusting screws (22) being prestressed by spring elements (24).
8. Applicator unit according to Claim 6, characterized in that the mechanical adjusting mechanism has a lever-arm arrangement (28-30) which, via actuators (31-34) distributed over the length of the applicator unit (1), introduces flexural forces into the inflow-side lip (2), in order to set the metering gap (4) in zones by means of the resulting flexural deformations.
9. Applicator unit according to one of Claims 1 to 5, characterized in that the adjusting device has a thermal, hydraulic, pneumatic, magnetic, magnetostrictive or piezoelectric adjusting mechanism.
10. Applicator unit according to one of Claims 1 to 9, characterized in that servomotors are provided for actuating the adjusting device in zones.
11. Applicator unit according to one of Claims 1 to 10, characterized in that the adjusting device is actuable by remote control.
12. Applicator unit according to Claim 11, characterized in that the remote-controlled zonal activation of the adjusting device is carried out automatically in a control loop on the basis of measured values of the transverse profile of the applied liquid or pasty medium (6).
13. Applicator unit according to one of Claims 1 to 12, characterized in that, in addition to the adjusting device for the inflow-side lip (2), a second adjusting device (14, 17, 18) for the outflow-side lip (3) is provided, by means of which the distance between the outflow-side lip (3) and the inflow-side lip (2) is capable of being set in zones over the length of the applicator unit (1).
14. Applicator unit according to Claim 13, characterized in that the adjusting device (20-25; 28-34) for the inflow-side lip (2) is designed for a fine setting of the metering gap (4) and the additional adjusting device (14, 17, 18) for the outflow-side lip (3) is designed for an approximate setting of the metering gap (4).
15. Applicator unit according to Claim 1, characterized in that

    the inflow-side lip (2) is connected to a number of adjusting spindles (22) which are arranged so as to be distributed over the length of the applicator unit (1) and by means of which the distance between the inflow-side lip (2) and the outflow-side lip (3) is capable of being set in zones over the length of the applicator unit (1),

    each adjusting spindle (22) being rigidly connected fixedly in terms of rotation to the inflow-side lip (2), and

    each adjusting spindle (22) being adjustable in the axial direction relative to a carrying device (10) of the applicator unit (1) by means of an actuating device (26) .
16. Applicator unit according to Claim 15, characterized in that the actuating device (26) is a nut which is arranged on a threaded part of the adjusting spindle and by means of which the distance between the inflow-side lip (2) and the outflow-side lip (3) and consequently the width of the metering gap (4) are capable of being set.
17. Applicator unit according to Claim 15, characterized in that the adjusting spindle (22) is assigned a spring element (24).
18. Applicator unit according to Claim 17, characterized in that the spring element (24) is supported on a fixed component (20) and loads the adjusting spindle (22) in the "closing" or "opening" direction of the metering gap (4).
19. Applicator unit according to one of Claims 15 to 18, characterized in that each adjusting spindle (22) has a flexion point (21).
20. Applicator unit according to Claim 19, characterized in that the flexion point (21) takes the form of a thin point resembling a leaf spring.
21. Applicator unit according to Claim 18, characterized in that the wide side of the thin point resembling a leaf spring runs along the horizontal axis of the adjusting spindle (22), the thin point being deformable elastically about an axis (27) running parallel to the longitudinal axis of the applicator unit (1).
22. Applicator unit according to Claim 17, characterized in that the spring element (24) is capable of being prestressed by means of a prestressing nut (23).

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