DE102008000808A1 - Device to provide doctor blade unit for dosing/equalizing coating medium layer that is applied on paper-, cardboard- or other fibrous material web moving in machine direction within production- and/or processing machine, has support relief - Google Patents

Abstract

The device comprises a support relief (1), in which a doctor blade unit (4) is incorporated and transportable to a doctor blade beam, a crane or a carriage for transporting the support relief to the blade beam or the intermediate bearing, and a lever pivotably mounted at the blade beam around a rotating axis. The doctor blade unit has a doctor blade as a doctor blade element or a doctor blade bar (3a) incorporated into a doctor blade bed (3). The support relief extends its transport direction parallel to a longitudinal axis of the doctor beam i.e. in a machine transverse direction. The device comprises a support relief (1), in which a doctor blade unit (4) is incorporated and transportable to a doctor blade beam, a crane or a carriage for transporting the support relief to the blade beam or the intermediate bearing, and a lever pivotably mounted at the blade beam around a rotating axis. The doctor blade unit has a doctor blade as a doctor blade element or a doctor blade bar (3a) incorporated into a doctor blade bed (3). The support relief extends its transport direction parallel to a longitudinal axis of the doctor beam i.e. in a machine transverse direction. The blade beam is an intermediate bearing assigned to the blade beam. The support relief has a recess (2) for receiving the blade unit. The blade unit with the support relief is bringable to the blade beam and/or the intermediate bearing. The blade unit exits the support relief during bringing into the machine and/or back to the blade beam and/or the intermediate bearing. A thorn or contact surfaces for the support relief are provided at the blade beam and/or at the assigned intermediate bearing. The blade beam has consoles for receiving several blade units with or without support relief. The consoles are arranged next to each other and/or one above the other on one side of the blade beam lying against the blade unit in its operating position. The lever has a device for receiving the blade unit at its one end, is pivotable, so that the blade unit is pivotable between a receiving position and an operation position, and is arranged in a vertical plane to the longitudinal axis of the blade beam. The blade units are supplyable as a supply from the intermediate bearing to the blade beam. The blade unit is directly introducible in the operating position. An independent claim is included for a method for providing a doctor blade unit for a blade beam.

Description

The The invention relates to a device for providing a doctor unit, the squeegee unit for dosing or leveling one in a coater applied to a running paper, board or other fibrous web Application medium layer is used and the doctor unit as doctor element a doctor blade or a doctor blade received in a doctor bed having. The invention also relates to a method for providing a squeegee unit.

coaters be used for coating, gluing or impregnating one running fibrous web used. They contain a coating device and usually a squeegee device. The doctor device comprises a squeegee carrying a squeegee unit. The doctor unit comprises, as already mentioned above, either a doctor blade or a doctor blade. The said squeegee element serves to the application medium applied to the fibrous web (also referred to as stroke) in surplus order in his Thickness (line weight) to adjust or only to even.

Becomes As a doctor blade element uses a metering rod, this is ordinary driven during operation. The metering rod is included taken in a doctor bed, consisting of rubber or a plastic. The squeegee bar with doctor bed or the alternatively usable doctor blade or doctor bar are fixed in a holding device. The holding device again firmly attached to the doctor bar, for example, by casting, glued, welded or screwed.

Doctor devices of this type are known. See for example DE 102 07 327 A1 or US 6,786,972 B2 ,

The Coating machine, moreover, usually has a rotatably mounted Back-up roll or counter roll on, to be deleted from the Railway is partially wrapped. In the wrap area will open the moving web the order medium, z. B. pigmented coating color, Glue or starch with a coating aggregate, for example Nozzle applicator, applied. The squeegee unit is at a location remote from the applicator, depending on the desired Residence time of the application medium on the fibrous web, arranged.

The Squeegee unit, but especially the squeegee element is subject during the operation of a more or less severe wear. In addition, particles settle on the surface the entire doctor blade unit firmly, so that the doctor blade result unsatisfactory is. Therefore, the squeegee unit must from time to time against a new one or a regenerated doctor unit replaced, maintained or getting cleaned. So far, this is mainly done manually. This is time consuming and requires multiple operators. The exchange is associated with expenditure of energy. This also exists Risk of injury to the operating personnel. Furthermore There is a risk that the new squeegee unit during installation Bends and remains a deformation that the work result the doctoring affected.

Of the Invention is the object of a device of the initially mentioned type, and to provide a method with or with the the provision of a new or regenerated or maintained Doctor unit quickly and without much effort and time is feasible.

According to the invention the task according to claim 1 with a device in which a carrying aid for the to be provided Doctor unit is provided. The doctor unit is preferably in taken a recess of the carrying aid, in which they to the squeegee bar or the installation site is transportable. The preferred transport direction the carrying aid with the doctor unit extends parallel to the longitudinal axis the squeegee bar. Transporting makes it easier and easier than before.

The inventive device protects against especially the squeegee element, which is a squeegee blade or a squeegee bed can be recorded metering rod, from damage of outside or against too much bending during transport to the machine, d. H. in the squeegee device of Coater.

at very wide machines, which today can be up to 10 m and more wide it is expedient if one Transport device, such as a crane or a cart for Transporting the carrying aid with the doctor unit to the doctor bar is provided.

there it makes sense with wide machines, the squeegee unit together bring the carrying aid in the doctor bar.

alternating It can be provided that the doctor unit during retraction in the squeegee bar before leaving the carrying aid.

At the Doctor blade bar can be provided a defined docking position, for example, from a mandrel or contact surfaces for the carrying aid and / or the doctor unit consists. Leave it Make sure you always have the same position can be approached.

A expedient embodiment of the device may be that the squeegee has consoles for Take one or more doctor units with or without carrying aids. The consoles can be next to each other and / or one above the other be arranged on that side of the squeegee, the squeegee unit in their working position.

A further embodiment of the device may be that at least one lever is provided on the squeegee to a pivot axis is pivotally mounted and at one end a receiving device, in particular for receiving the doctor unit having. In this case, one end of the lever with a ready-made doctor unit be equipped.

To mention that the use of the carrying aid without this Lever manages, namely, when the transport of the squeegee unit done manually.

Advantageous it is when a plurality of levers is provided, wherein the Lever in vertical planes to the longitudinal axis of the squeegee are arranged. This is a weight-related sagging the squeegee unit, especially on wide machines, avoidable.

Of the Lever is otherwise pivotable so that the doctor unit pivotable between a receiving position and a working position is. The pivoting of the lever or the manual or motorized respectively. In a motorized operation, an electrical, pneumatic or hydraulic actuator find use.

Very It is advantageous if at least one doctor unit, d. H. two or more doctor units, preferably two pieces, as Stock from an intermediate storage fed to the doctor bar are. The subsequent change of the doctor unit can This is done much faster than before.

There the provision of the doctor unit by the way during the operating phase of the coating machine or the doctor device can be done, the provision and replacement of the doctor unit is very effectively.

Possible It is also that the squeegee unit instead of a stock or Intermediate bearing positioning directly into the working position einbringbar is.

The The object of the invention is also with a method according to claim 14 solved.

This Method for providing a doctor unit for a Doctor blade, the part of a coating machine for coating a is ongoing paper, board or other fibrous web is characterized in that the doctor unit is provided with a carrying aid and retracted parallel to the installation location or to the squeegee bar. The retraction direction extends in the direction of the doctor blade longitudinal axis. It is also important that before a new doctor unit in the installation or the squeegee bar is retracted, the spent squeegee unit Will get removed.

The Equipping the carrying aid, as well as the transport of the carrying aid can be done manually. Possible and less power consuming for the operator of the coating machine is the provision with a means of transport or lifting, such as a crane and / or a crane Dare.

The Driving into the installation site, d. H. in the doctor bar is preferred in the direction of the driver's side to the drive side and thus across the Machine direction or as already stated in the longitudinal direction of the Squeegee or one supporting the fibrous web to be coated Roller.

The Doctor unit can be placed directly in the working position.

alternative it is possible that at least one squeegee unit in a, the squeegee bar assigned intermediate storage is brought. It can while several new or regenerated doctor blade units are stored.

there It is advantageous if the respective einzufahrende in the doctor bar Doctor unit from a supply, for example from a chute off, in the machine longitudinal direction of the doctor bar is supplied. This makes the provision even more effective.

It should be mentioned that in the case of using a driven metering rod as a doctor element of the doctor unit to be changed the existing drive of the metering rod about an axis parallel to Axis of the metering rod can be pivoted.

advantageous Design features result from further subclaims.

• – es wird weniger Bedienpersonal als bisher benötigt,
• – weniger Verletzungsgefahr, da weniger Kraftaufwand notwendig ist,
• – bessere Ergonomie,
• – das Bereitstellen und Wechseln der Rakeleinheit ist schonender für das Rakelelement aufgrund geringerer Durchbiegung,
• – Bereitstellung ist während des normalen Streichbetriebes möglich, dadurch ist
• – schnellerer Rakelwechsel möglich.

Overall, the following advantages can be achieved with the present invention:

• - fewer operators are needed than before,
• - less risk of injury as less effort is required,
• - better ergonomics,
• The provision and exchange of the doctor unit is gentler for the doctor element due to less deflection,
• - Provision is possible during normal strike operation, this is
• - faster blade change possible.

The Invention is for both the loading of the squeegee with a new or regenerated doctor blade unit as well the removal of a spent or to be serviced blade unit usable from the machine.

The The invention is explained in more detail with reference to the drawings. In detail, the following is shown schematically:

1 shows a carrying aid for receiving a doctor unit

2 shows a squeegee bar in the elevation.

3 shows the item of 2 in the plan view.

4 shows a doctor bar with a receiving device.

5 shows a coating device with about a longitudinal axis rotatable blade beam.

6 shows a doctor bar with a receiving device.

7 shows a coating device with squeegee bars and another conveyor.

8th shows a preferred embodiment of 7 .

9 . 9a and 9b show a pivotable drive for a metering rod as doctor element.

In the figures are the same components provided with the same reference numerals.

In the 1 illustrated carrying aid 1 consists of a support, which has an upwardly open recess 2 having. In the recess 2 there is a squeegee bed 3 with one from the squeegee bed 3 carried metering rod 3a , which in total as a squeegee unit 4 should be designated. The carrying aid 1 serves to transport or retract the doctor unit 4 in a squeegee bar 5 (not shown here) of a coating machine. In the example, the carrying aid is transported 1 including the squeegee unit 4 by means of a transport and lifting device 20 , In the example is an associated suspension 21 shown.

The in 2 shown squeegee bars 5 has two rows of consoles 6 . 7 on. Each console series here includes three consoles - see also 3 , Each console row can be a carrying aid 1 take up.

In the example shown, the in 1 illustrated and described carrying aid 1 according to 1 on the upper console row 6 , At the upper right part of the squeegee 5 is a squeegee unit for clarity 4 shown in working position.

3 is a top view of the in 2 illustrated squeegee bars 5 illustrated. The loading of the consoles 6 . 7 takes place here with a doctor unit 4 in the direction of the arrow. In this case, the squeegee unit 4 in the carrying aid 1 lying on the console row. But you can also like this in here 3 shown, be pushed separately, that is without the carrying aid 1 ,

After placing the squeegee - with or without carrying aid - the squeegee must be moved to its working position. This is off 2 recognizable. There is the doctor bed 3 with squeegee 4 as already described, in the upper right part of the squeegee 5 , For transport, a transport device is necessary. The carrying aid 1 and the squeegee bar 5 have positioning elements, such as a mandrel or contact surfaces, so that the carrying aid 1 via this positioning positively fit to a docking position on the doctor bar 5 can be brought. With the help of these positioning elements, the carrying aid 1 always reproducibly approach the same position. For example, the receiving device 8th have such positioning elements, so that the carrying aid 1 dock directly to the working position and there a doctor unit with a spent squeegee 4 pick up or a new squeegee 4 can provide that in the receiving device 8th is introduced.

4 again shows a squeegee bar 5 with a recording device 8th , The squeegee bar 5 is stationary. The recording device 8th however, it is pivotable. It consists essentially of at least one lever 8a that is about a rotation axis 11 is pivotable, which runs horizontally and is located at the right upper edge of the squeegee 5 located. In the illustration according to 4 is the recording device 8th in a position in which the squeegee unit 4 with squeegee bed 3 and squeegee bar 3a in working position. The rotation of the dashed recording device 8th - As an embodiment of the carrying aid 1 - in the working position is shown with a curved double arrow.

5 schematically shows the entire coating device. The squeegee unit 4 works with a support or counter roller 9 for the fibrous web B together. The squeegee unit 4 consisting of the doctor bed 3 and the squeegee bar 3a are in one not shown holding device on the doctor bar 5 fixed. The squeegee bar 5 is in turn on a stand 10 stored and about a rotation axis 5a pivotable between the working position shown extended and the rest position shown in dashed lines. In this rest position is the squeegee bar and squeegee unit 4 from the counter roll 9 swung off and the squeegee unit 4 can be replaced. The holding device is not changed with.

In the embodiment according to 6 one recognizes a cross section circular blade bar 5 , On this is a recording device 8th pivoted. It basically consists of a lever 13 that is about a rotation axis 11 is pivotable. One end can be finished with a ready-made squeegee unit 4 which is not yet ready to work, and then be pivoted into the working position - see the right part of the figure, in which the doctor unit 4 in working position. It is conceivable, of course, such an arrangement of 4 and 6 in which the axis of rotation 11 at any other place on the lever 13 , For example, in the middle, is arranged. Furthermore, it is conceivable, several such levers 13 in planes perpendicular to the axis of rotation 11 to arrange. The levers 13 would then preferably be aligned with each other, whereby a deformation of the doctor unit 4 For example, be avoided by their weight-induced sagging.

The lever 13 For example, it can be pivoted manually or by motor about the axis of rotation in or against the machine direction MD. However, an electric pneumatic or hydraulic actuator can also be used for this purpose. Such a mechanically assisted supply and / or removal of the doctor unit 4 On the one hand contributes to better protection, as a bumping and an impermissible deflection are avoided and on the other hand to a better handling of the doctor unit 4 due to the relatively high weight - especially in wide machines - less personnel is required and shorter change and thus shorter downtime can be achieved. Also, that of the carrying aid 1 in the receiving device 8th provided doctor blade unit 4 in an intermediate storage position of the lever 13 remain.

7 again shows an indicated counter-roller 9 and a squeegee bar 5 with squeegee unit 4 , The squeegee bar 5 is in such a position in which he uses a new squeegee unit 4 can be equipped. One for several squeegee units 4 provided conveyor 12 - As another embodiment of the carrying aid 1 - Includes a slide, by means of which the individual stored doctor blade units 4 one after the other - as required and with appropriate wear - the squeegee bar 5 can be supplied. The lowest squeegee unit 4 is located in the most favorable change position. The conveyor 12 can also with the support of other individual carrying aids 1 be filled.

The filling of the squeegee units 4 Can be done manually or automatically, so that the squeegee unit 4 when loading the squeegee bar 5 not unduly deflected.

8th shows a preferred embodiment of in 7 shown conveyor 12 , The conveyor 12 is also designed as a slide, but slides the doctor unit 4 on the back of the doctor bed 3 velvet squeegee element 3a along the surface of the conveyor 12 , At this, the squeegee bar 5 associated end of the conveyor 12 can the squeegee unit 4 in the squeegee bar 5 fall into it independently or be imported manually from there, as the broken arrow shows. Instead of the squeegee bar shown here 5 could only be the carrying aid 1 be present, in the recess 2 the squeegee unit 4 arrives. The position number of the carrying aid 1 with recess 2 are given in brackets due to this alternative possibility.

9 shows a front view of the in cross-machine direction CD (cross direction) elongated blade beam 5 with view in machine direction MD. As a doctor element of the doctor unit here is a rotatable metering rod 3a intended. At both ends of the metering rod 3a Here is a Rakelstabkupplung here 22a and 22b available for a drive 15 the squeegee bar 3a , The squeegee bar 3a itself is not shown here. The drive 15 , ie the frontal drives 15a and 15b are each to a swivel bracket 23a and 23b on the squeegee bar 5 mounted and stored so that the drive can be moved away on at least one side. In this case, pivoting about an axis D parallel to the doctor rod or doctor blade axis is advantageous.

In the example shown is 15b pivoted.

After replacing the squeegee unit and / or cleaning or maintenance is the drive 15a or 15b simply moved back into his working position and is ready for use again.

A representation of the operating position of the drive 15 respectively. 15a is in 9a , a view A of 9 shown. 9b , a view B from 9 shows the change position in mirrored representation.

This Abschwenkmöglichkeit is structurally very easily solved and means a cheap Space. The pivoting can be done by motor.

Alternatively, a horizontal displacement of the doctor rod drive 15 respectively. 15a respectively. 15b makes sense, because this ensures a high level of security and easy, even manual adjustment is possible.

In The present embodiments has been used as a doctor element each described a recorded in a doctor bed doctor blade. However, under the phrase "doctor element" also any other type of squeegee, such as doctor blade or squeegee bar to understand, however, each without the presence of a doctor bed in the holding device is held.

1

carrying aid

2

recess

3

doctor bed

3a

doctor bar

4

squeegee unit

5

blade beam

5a

axis of rotation

6

console

7

console

8th

recording device

8a

lever

9

backing roll

10

stand

11

axis of rotation

12

Conveyor

15

Metering rod drive

15a, 15b

Metering rod drive

20

transport means

21

suspension

22a

Metering rod coupling

22b

Metering rod coupling

23a

swivel holder

23b

swivel holder

B

Fibrous web

D

pivot point

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 10207327 A1 [0004]
• - US 6786972 B2 [0004]

Claims (21)

Device for providing a squeegee unit ( 4 ), the doctor unit ( 4 ) is used for metering or leveling a coating medium layer, which is applied within a manufacturing and / or finishing machine on a running in the machine direction (MD) paper, cardboard or other fibrous web, wherein the doctor unit ( 4 ) as doctor element a doctor blade or in a doctor bed ( 3 ) received metering rod ( 3a ), characterized in that a carrying aid ( 1 ) is provided, in which the doctor unit ( 4 ) and in which the doctor unit ( 4 ) to a receiving location, in particular a squeegee bar ( 5 ) is transportable, wherein the transport direction parallel to the longitudinal axis of the doctor blade ( 5 ), that is in the cross-machine direction (CD) extends. Apparatus according to claim 1, characterized in that the recording location a the squeegee bar ( 5 ) associated with intermediate storage. Apparatus according to claim 1 or 2, characterized in that a transport device ( 20 ), for example a crane or a carriage for transporting the carrying aid ( 1 ) to the squeegee bar ( 5 ) or the intermediate storage is provided. Apparatus according to claim 1 to 3, characterized in that the carrying aid ( 1 ) a recess ( 2 ) for receiving the doctor unit ( 4 ) having. Device according to at least one of claims 1 to 4, characterized in that the doctor unit ( 4 ) together with the carrying aid ( 1 ) to the squeegee bar ( 5 ) and / or the intermediate storage can be brought. Device according to at least one of claims 1 to 4, characterized in that the doctor unit ( 4 ) when entering the machine or towards the doctor bar ( 5 ) and / or to the temporary storage the Traghilfe ( 1 ) leaves. Device according to at least one of the preceding claims, characterized in that the recording location for the doctor unit ( 4 ), ie at the squeegee bar ( 5 ) and / or at the associated intermediate storage a defined docking position, for example, a mandrel or contact surfaces for the carrying aid ( 1 ) and / or the doctor blade unit ( 4 ) is or are provided. Device according to at least one of the preceding claims, characterized in that the doctor bar ( 5 ) Consoles ( 6 . 7 ) for receiving one or more doctor blade units ( 4 ) with or without carrying aid ( 1 ), where the consoles ( 6 . 7 ) side by side and / or one above the other on the side of the doctor blade ( 5 ) are arranged, which the squeegee unit ( 4 ) lie in their working position. Device according to at least one of the preceding claims, characterized in that at least one lever ( 13 ) provided on the doctor bar ( 5 ) about a rotation axis ( 11 ) is pivotally mounted, and at its one end a receiving device ( 8th ) for receiving the squeegee unit ( 4 ) having. Device according to claim 9, characterized in that the lever ( 13 ) is pivotable so that the doctor unit ( 4 ) is pivotable between a receiving position and a working position. Apparatus according to claim 9 or 10, characterized in that the at least one lever ( 13 ) in a vertical plane to the longitudinal axis of the doctor blade ( 5 ) is arranged. Device according to at least one of the preceding claims, characterized in that at least one doctor unit ( 4 ), preferably two doctor blade units ( 4 ), as supply from the interim storage are fed to the receiving location. Device according to at least one of the preceding claims, characterized in that the doctor unit ( 4 ) can be introduced directly into the working position. Method for providing a squeegee unit ( 4 ) for a squeegee bar ( 5 ) which is part of a coating machine for coating a machine-direction (MD) paper, board or other fibrous web, the doctor unit ( 4 ) is used for dosing or leveling a coating applied to the fibrous web application medium layer, characterized in that with a carrying aid ( 1 ) the squeegee unit ( 4 ) and is introduced parallel to a recording location, wherein the introduction in the cross-machine direction (CD) takes place. A method according to claim 14, characterized in that the doctor unit ( 4 ) directly into a working position, ie to a squeegee bar ( 5 ) is brought as a mounting location. A method according to claim 15, characterized in that the spent doctor unit ( 4 ) is removed before a new doctor blade unit ( 4 ) into the installation location or the doctor bar ( 5 ) is retracted. A method according to claim 14, characterized in that at least one doctor unit ( 4 ) in a squeegee bar ( 5 ) associated with intermediate storage is brought. A method according to claim 15, characterized in that the intermediate storage as storage for a plurality of doctor units ( 4 ) with or without carrying aid ( 1 ) serves. A method according to claim 18, characterized in that the respective the doctor blade ( 5 ) to be supplied ( 4 ) from the supply or intermediate storage out, for example via a conveyor ( 12 ), for example a chute, is moved in the machine longitudinal direction (MD). Method according to at least one of claims 14 to 19, characterized in that when using a driven metering rod ( 3a ) as a doctor element of the doctor blade unit to be changed ( 4 ) at at least one end of the metering rod ( 3a ) existing drive ( 15 . 15a . 15b ) about an axis or pivot point D parallel to the axis of the metering rod ( 3a ) is pivoted. Method according to at least one of claims 14 to 20, characterized in that the provision of the doctor unit ( 4 ) takes place during the operating phase of the coating machine or the doctor device.