DE102007000775A1 - Device for double layered coating of liquid to pasty coating medium on paper, cardboard or other fiber material web moving in running direction, comprises two curtain coating nozzles arranged above the fiber material web - Google Patents

Abstract

The device for double layered coating of liquid to pasty coating medium on paper, cardboard or other fiber material web (5) moving in running direction, comprises two curtain coating nozzles (2, 3) arranged above the fiber material web for the coating of two medium layers. The number of curtain coating nozzles corresponds to the number of medium layers to be coated. Each curtain coating nozzle delivers a curtain (2a) moving under the effect of gravitation. Two coating units (8, 10) are arranged one above the other in plain for coating the curtain. The device for double layered coating of liquid to pasty coating medium on paper, cardboard or other fiber material web (5) moving in running direction, comprises two curtain coating nozzles (2, 3) arranged above the fiber material web for the coating of two medium layers. The number of curtain coating nozzles corresponds to the number of medium layers to be coated. Each curtain coating nozzle delivers a curtain (2a) moving under the effect of gravitation. Two coating units (8, 10) are arranged one above the other in plain for coating the curtain and are constructionally connected with one another. Screw-, welding- or plug connections are intended for connection path. The coating units are parallely arranged to each other in such a way that the coating medium delivered from each coating unit and/or from each plain is flowed off in running direction of the fiber material web. The coating units are arranged downstream to the last or first curtain coating nozzle at the flow side or inlet side of the fiber material web for the fiber material web moving in running direction. A guiding plate is arranged beneath the curtain coating nozzles during the stretching process, passing over all nozzles and arranged up to the height of one of the coating units and/or plain. The curtain coating nozzle, the guiding plate and/or the coating units are movable relative to each other. The guiding plate is arranged parallel to running fiber material web in order to transmit coating medium absorbed from single or several curtains on the fiber material web to be coated. A further coating unit is slidable to the first and/or inlet side curtain coating nozzle and is suited in order to transmit the coating medium absorbed from the coating unit on the guiding plate or to collect and/or discharge the medium separated from the other medium. The coating units are formed as grooves and/or tubs and are arranged parallel to the running fiber material web.

Description

The The invention relates to a device for at least two-layered Apply at least one liquid to pasty Application medium on a moving in the direction of paper, Cardboard or other fibrous web, having above the fibrous web arranged curtain application nozzles for application the at least two media layers, wherein the number of curtain applicator nozzles the number of medium layers to be applied and corresponds each applicator nozzle is essentially gravitational emits moving curtain and being between the curtain application nozzles and the fibrous web collecting means for separate collection each curtain are provided.

Such a device is known from DE 103 59 122 A1 known. However, this device is quite expensive in its construction. In addition, take the side by side and crosswise superimposed gutters at certain machine widths so large a place that it can be poorly viewed by the operator of the device.

Of the Invention is the object of a device of the initially mentioned type to improve that the disadvantages of Prior art does not occur.

The The object of the invention is achieved in that at least two collecting devices provided and at least two of these Receiving devices arranged in layers one above the other are. They thus form a compact, space-saving structural unit.

Very It is advantageous that the number of receiving devices at least the number of layers to be applied. This is a separate one Collection of different media (type, composition, rheology) possible. It can also have fewer receiving devices be present as catching media. For example, could Remember to collect only expensive existing media separately.

These one above the other arranged collecting devices are substantially parallel to each other arranged.

One criss-cross discharge or discharge in the direction Both web edges and the associated complex Return operations will be carried out at the inventive solution avoided. The inventive Device is still compact.

One Another advantage is that the collecting devices with other components, such as the railway leading and deflecting Airturn can not collide.

About that In addition to the fibrous web over its length tilted, stacked collecting devices better visible and manageable by operating personnel, d. H. easier too clean and maintain as the crosswise arranged from the stand of the technique.

The Trapped application medium can due to the inclined arrangement always flow in the direction of the fibrous web, which Blockages or encrustations or caking on the collecting surface be avoided. Cleaning, as I said, easier or are less necessary then.

Further advantageous embodiments will become apparent from further subclaims.

Based of embodiments, the invention is intended to be closer be explained.

It demonstrate:

1 : A schematic representation of the device according to the invention with two successively arranged curtain application nozzles for applying a double layer on a paper, cardboard or other fibrous web in the ready position immediately before the coating process

2 : the device according to 1 , but in operating position

3 : the device of 1 also in ready position again, here however with changed collection of the two curtains delivered by the curtain applicator nozzles

4 : another alternative to 1 respectively. 3

5 : A schematic representation of the device according to the invention with three successively arranged curtain application nozzles for applying a triple layer on a paper, cardboard or other fibrous web in the ready position

6 : the device according to 6 , but in operating position

7 : the device according to 6 , again in stand-by position, but here with changed interception of the delivered by the curtain applicator nozzles three curtains

8th : another alternative to 5

9 : the device according to 8th , but in operating position

10 : the device according to 8th Again in ready position, here, however, with changed interception of the delivered by the curtain applicator nozzles three curtains

In the same reference numerals mean the same components or Functions. In the individual figures, the explanation only as far as changes are made previous figures exist.

In the 1 is schematically an applicator device according to the invention 1 with two successively arranged curtain application nozzles 2 and 3 ,

The number of curtain application nozzles 2 and 3 In this case, the number of medium layers to be applied corresponds to a paper, board or other fibrous web moving obliquely downward in the direction of travel L. 5 , That is the curtain application nozzle 2 and the curtain application nozzle 3 produce two layers or a double layer not shown separately 4 during the coating operation, ie in the operating state.

In 1 should be shown the ready position immediately before the coating process. In this position, already have of the curtain applicator nozzles 2 and 3 delivered curtains 2a and 3a on a diagonally arranged guide surface below 6 superimposed in two layers and form after passing the guide surface 6 one on the surface of the fibrous web 5 falling, double-layered curtain 6a out.

As you can see, the two curtain application nozzles 2 and 3 above the fibrous web 5 arranged. In addition, they are at an angle to the guide rollers 7.1 and 7.2 down moving track 5 arranged at different heights. The first curtain application nozzle 2 is higher than the second nozzle 3 arranged. Both nozzles 2 and 3 are in horizontal direction, see double arrows a and c and in vertical direction, see double arrows b and d, adjustable. This can be done manually in the simplest case. This is both a horizontal distance y between the two curtain applicator nozzles 2 and 3 and in each case a vertical distance z1 and z2 to the fibrous web 5 adjustable.

In the space between the two curtain application nozzles 2 and 3 and the here obliquely downgoing fibrous web 5 is at least one of the width of the curtains or the device 1 adapted catcher 8th for the curtains 2a and 3a intended.

In the example according to the 1 there is the catcher 8th from two parallel gutters or drip pans 8.1 and 8.2 which are arranged one above the other and connected to each other. Incidentally, their number here corresponds exactly to the number of curtains to be collected separately from each other 2a and 3a or the resulting two layers, or the double layer 4 , The reception facilities 8.1 . 8.2 form two levels I and II, where they are arranged so that from each level I, II of the respective curtain 2a . 3a dispensed application medium M1, M2 in the direction L of the fibrous web 5 can flow down and in the direction of the continuous fibrous web.

It is important that one of the gutters, that is the lower gutter in the example 8.1 , both a single medium, as well as from all curtains resulting medium M1, M2 (or Mn in other curtains or applied layers), which over the guide surface 6 expires, can catch.

Like from the 1 recognizable, are the gutters 8.1 and 8.2 over connecting bridges 9 connected together and as a compact unit above the Bahnumienkwalze 7.2 arranged, from and to which they are in the direction of arrow "e" and swung back and forth. The pivoting can be rotational or translational movements. Thus, the operator of the device has enough space for monitoring and maintenance in both the operating, as well as in the maintenance or standby position of the device.

Seen in the running direction L of the fibrous web is in front of the first curtain application nozzle 2 Yet another catcher or gutter or trough 10 present in the first curtain 2a for separate collection of this curtain according to the direction of arrow f can be driven.

This groove 10 is suitable, the captured by her order medium to the guide surface 6 or pass on a guide plate.

This guide surface 6 is arranged inclined and therefore also suitable trapped application medium, resulting from a single or multiple curtains, to be coated fibrous web 5 pass.

Above the first guide roller 7.1 is also a so-called Aircut 11 just above the fibrous web 5 available to those with the fast-moving train 5 remove co-flowing layers of air or from the curtains 2a and 3a to be able to keep away. Also this Aircut is in horizontal Rich for the purpose of necessary transfer operations of the fibrous web displaceable, as indicated by double arrow g.

The 2 also shows the in 1 illustrated device 1 , where the 2 represents the operating position.

It can be seen that the curtain application nozzles 2 and 3 their curtains 2a and 3a to the underlying guide surface 6 from which the common double-layered curtain 6a directly on the surface of the fibrous web 5 as a double layer 4 arrives. The catcher 8th with their individual gutters 8.1 and 8.2 stay here unused. Likewise, the gutter remains 10 unused.

The 3 again shows the device according to the 1 respectively. 2 in a standby position where all job media, or the curtain 2a and also the curtain 3a be collected separately from each other. The curtain application nozzle 2 has therefore been moved further to the left, so the catcher 10 here for the curtain 2a Has space. Also the curtain application nozzle 3 is moved, but here to the right, so they are above the catcher 8th or the collecting troughs arranged one above the other 8.1 and 8.2 stands, so the curtain 3a in the upper channel 8.2 reach and drain from there. Incidentally, has the gutter 10 an overflow 10a to the guide surface 6 so that the color flow is fast and defined between positions 10 and 6 in their relative movement can switch to each other.

The 4 represents an alternative to in 3 shown device 1 in the ready position. Instead of the first curtain 2a with the individual catcher or gutter 10 to catch, here is only the guide surface 6 used. From the guide surface 6 From the medium M1 flows further downstream into the lower channel 8.1 the compact catcher 8th , The curtain 3a or the medium M2 arrives as at 3 in the upper channel 8.2 ,

In 5 schematically another device according to the invention shown in the ready position and with 20 designated. This device essentially corresponds to that of 1 Therefore, the reference numerals used from the previous figures are kept in principle, but by the amount 20 be increasingly indicated.

In the example of 5 There are three successively arranged curtain applicator nozzles, ie a first curtain application nozzle 22 , a second curtain application nozzle 23 and additionally a third curtain applicator nozzle 50 for the purpose of applying a triple layer 24 on a paper, cardboard or other fibrous web 25 , All nozzles 22 . 23 . 50 are above the guide surface 26 arranged so that a common flow of all three media M1, M2, and M3 in the lower and the first gutter 28.1 the compact catcher 28 before (startup) or after (stop) the coating process can take place. The left single trough 30 remains unused and remains in a left-shifted position.

The 6 shows the previously explained device 20 according to 5 , but now in operating position (painting process). These are the three curtain applicator nozzles 22 . 23 and 50 as well as the slanted guide surface underneath 26 moved further to the left, so that the generated three-layer curtain 26a directly on the surface of the fibrous web 25 can fall and there is a triple layer 34 can form. The likewise existing stacked collecting devices 28 . 28.1 and 28.2 stay unused.

In the 7 is also the device again 20 shown, but shows again in opposite 5 changed standby position. In this case, all three delivered media M1 to M3 are collected separately and with different facilities. The first curtain 22a (M1) is from the gutter 30 , the second curtain 23a (M2) from the guide surface 26 and the third curtain 50a (M3) from the second or upper gutter 28.2 the compact catcher 28 collected. The guide surface 26 transports the medium collected by her to the lower gutter 28.1 the compact catcher 28 ,

The 8th shows a further device according to the invention 200 , which is why all reference numerals (that is, the same components already included in the other figures) to 200 increasingly indicated, but should not be explained here.

This variant provides an alternative to in 5 shown arrangement and also works again with three juxtaposed curtain applicator, here with 220 . 230 and 250 are designated. In this embodiment, instead of just two gutters, three gutters 228.1 . 228.2 and 228.3 available. The third gutter 228.3 also belongs to the compact catcher 228 which is why it forms a third level III.

9 shows the same device 200 , as in 8th , which indicates here but the operating position (coating process). You can see a three-layered curtain 226a resulting from the three curtain application nozzles 220 . 230 . 250 with the respective application media M1 to M3, located on the guide surface 226 superimpose and run together. On the surface of the fibrous web 225 These then form a triple layer 234 ,

Finally, the shows 10 the device 200 in one opposite the 8th changed standby position. Here are those of the individual curtain application nozzles 220 . 230 and 250 delivered three curtains 220a . 230a and 250a each collected separately.

The medium M1 or the first curtain 220a gets off the baffle 226 first collected and then to the lowest or first gutter 228.1 (Level I). The medium M2 or the second curtain 230a enters the second gutter 228.2 (Level II) and the third medium M3 or the curtain 250a is from the third, ie the uppermost gutter 228.3 (Level III) of the compact catcher 228 added.

Also, as the other standby figures show, in this configuration, the separately collected medium can each be in the direction of the inclined fibrous web 225 run well and is thus separately a sort of pure reuse or supply to the paint circuit (possibly with appropriate treatment, such as ventilation, filtering) available.

Begrudge is that instead of the illustrated two or three curtain application nozzles and the two or three superposed gutters a higher number of components within each Device is conceivable.

It should also be added that the arrangements shown in the figures are also rotated or the running direction L of the fibrous web 5 . 25 . 225 could be opposite.

The stacked collecting devices 8th . 28 . 228 Therefore, both the feed side (that is, the side where the web approaches the curtain application nozzles) and the drain side (that is, the side from which the web is away from the curtain application nozzles) may be associated. As the Aircut 11 is located on the inlet side, but the arrangement of stacked collecting devices on the said outlet side is cheaper, causing space conflicts with the Aircut be avoided.

are said drainage devices - as shown in the figures- arranged on the discharge side, the fibrous web runs over the deflection and from this downwards away. At the impact line the curtains in this case is a falling web guide advantageous.

are the said stacked drainage devices - such not shown in the figures on the inlet side, so The fibrous web runs from bottom to top and then over the deflection to the curtain applicator nozzles. At the The impact line of the curtains is a rising one in this case Web guide advantageous.

The Web guide of the other side can be designed as desired.

1, 20, 200

contraption

2, 22, 220

first Vorhangauftragsdüse

2a, 22a, 220a

curtain

3, 23, 230

second Vorhangauftragsdüse

3a, 23a, 230a

curtain

4

bilayer

5, 25, 225

Fibrous web

6 26, 226

baffle

6a

double layer curtain

7.1 7.2

guide roll

8th, 28, 228

catcher

8.1 28.1, 228.1

collecting channel or tub

8.2 28.2, 228.2

second Gutter or trough

228.3

third Gutter or trough

9 29

connecting web

10 30

catcher

11

Aircut

26a, 226a

three-layer curtain

34 234

Triple layer

250

third Vorhangauftragsdüse

a, b, c, d, e, f

adjustment

I, II, III

level

L

direction

M1

first medium

M2

second medium

M3

third medium

Y

distance

z, z1, z2

distance

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10359122 A1 [0002]

Claims (17)

Contraption ( 1 . 20 . 200 ) for applying at least two layers of at least one liquid to pasty application medium (M1, M2, M3) to a paper, board or other fibrous web moving in the running direction (L) ( 5 . 25 . 225 ), comprising above the fibrous web arranged curtain applicator nozzles ( 2 . 3 . 22 . 23 . 220 . 230 . 250 ) for the application of the at least two medium layers ( 4 ), whereby the number of curtain applicator nozzles ( 2 . 3 . 22 . 23 . 220 . 230 . 250 ) corresponds to the number of medium layers to be applied, and wherein each curtain applicator nozzle ( 2 . 3 . 22 . 23 . 220 . 230 . 250 ) a curtain moving substantially by gravity ( 2a . 3a . 22a . 23a . 220a . 230a . 250a ) and receiving devices ( 8th . 28 . 228 ) to catch the curtains ( 2a . 3a . 22a . 23a . 220a . 230a . 250a ) are provided, characterized in that at least two receiving devices ( 8th . 28 . 228 ) are provided and at least two of these collecting devices in planes (I, II, III) are arranged one above the other. Apparatus according to claim 1, characterized in that the number of receiving devices ( 8th . 28 . 228 ) at least the number of layers to be applied ( 4 . 34 . 234 ) corresponds. Apparatus according to claim 1 or 2, characterized in that in levels (I, II, III) arranged one above the other receiving devices ( 8th . 28 . 228 ) are structurally connected. Apparatus according to claim 3, characterized in that the collecting means ( 8th . 28 . 228 ), for which, for example, connecting webs ( 9 ), Screw, welding or plug connections are provided. Device according to at least one of the preceding claims, characterized in that the at least two collecting devices arranged one above another in planes ( 8th . 28 . 228 ) are arranged parallel to one another such that from each catching device or from each plane (I, II, III) that of the respective curtain ( 2a . 3a ) delivered application medium (M1, M2) in the running direction (L) of the fibrous web ( 5 . 25 . 225 ) drains off. Device according to at least one of claims 1 to 5, characterized in that the collecting devices ( 8th . 28 . 228 ) in the running direction (L) of the fibrous web ( 5 . 25 . 225 ), the last curtain applicator nozzle ( 3 . 50 . 250 ) are subordinate. Device according to at least one of claims 1 to 5, characterized in that the collecting devices ( 8th . 28 . 228 ) in the running direction (L) of the fibrous web ( 5 . 25 . 225 ), the first curtain application nozzle ( 2 . 22 . 220 ) are subordinate. Device according to at least one of the preceding claims, characterized in that the collecting devices ( 8th . 28 . 228 ) are arranged on the discharge side of the fibrous web. Device according to at least one of claims 1 to 7, characterized in that the collecting devices ( 8th . 28 . 228 ) are arranged on the inlet side of the fibrous web. Device according to at least one of the preceding claims, characterized in that the collecting devices ( 8th . 28 . 228 ) above a deflection device ( 7.2 . 27.2 . 227.2 ) for the in the running direction (L) moving fibrous web ( 5 . 25 . 225 ) are arranged. Device according to at least one of the preceding claims, characterized in that below the curtain application nozzles ( 2 . 3 . 22 . 23 . 220 . 230 . 250 ) during the coating operation a reaching across all nozzles and up to the level of one of the stacked collecting devices ( 8th . 28 . 228 ) or levels (I, II, III) guide plate ( 6 . 26 . 226 ) is arranged. Apparatus according to claim 11, characterized in that the curtain application nozzles ( 2 . 3 . 22 . 23 . 220 . 230 . 250 ), the guide plate ( 6 . 26 . 226 ) and / or the reception facilities ( 8th . 28 . 228 ) are movable relative to each other. Apparatus according to claim 11 or 12, characterized in that the guide plate ( 6 . 26 . 226 ) substantially parallel to the running fibrous web ( 5 . 25 . 225 ) and is adapted to be separated from a single or multiple curtains ( 2a . 3a . 22a . 23a . 220a . 230a . 250a ) collected order medium (M1, M2, M3, Mn) to one of the stacked receiving devices ( 8th . 28 . 228 ), preferably to the lowest collecting device ( 8.1 ; 28.1 ; 228.1 ) pass on. Apparatus according to claim 10 to 13, characterized in that the guide plate ( 6 . 26 . 226 ) is suitable for use with a single or multiple curtains ( 2a . 3a . 22a . 23a . 220a . 230a . 250a ) collected coating medium (M1, M2, M3, Mn) to the fibrous web to be coated ( 5 . 25 . 225 ) pass on. Device according to at least one of the preceding claims, characterized in that a further collecting device ( 10 . 30 ) preferably the first or inlet side arranged curtain application nozzle ( 22 . 220 ) or un ter is slidable or away from this, this further collecting device ( 10 . 30 ) is suitable to the order captured by her application medium (M1) to the guide plate ( 6 . 26 ) or to collect collected media separately from the other media or dissipate. Device according to at least one of the preceding claims, characterized in that the collecting devices ( 10 . 30 . 8.1 . 8th . 2 . 28.1 . 28.2 . 228.1 ; 228.2 . 228.3 ) are formed as gutters or trays. Device according to at least one of the preceding claims, characterized in that the collecting devices ( 8th . 28 . 228 ) approximately parallel to the running fibrous web ( 5 . 25 . 225 ) are arranged inclined towards.