DE102014102167A1 - Schnellwechselkalander - Google Patents

Abstract

Quick-change calender (100) in particular for the treatment of fleece, textile, plastic or paper webs with at least one nip (3), wherein at least one roller (1) together with at least one alternative roller (4, 5) in a movable magazine (6) is arranged ,

Description

The invention relates to a quick-change calender, in particular for the treatment of nonwoven, textile, plastic or paper webs.

With calenders, in particular those for the treatment of nonwoven, textile, plastic or paper webs, it is often necessary to exchange one of the two rolls.

There are already known Schnellwechselkalander. For example, the shows DE 34 22 091 C2 a calender, in which the upper roller can be changed relatively quickly. In this calender, it is possible to mount a new embossing roll on one side of a receiving space, to loosen the old roll and to push on the free part of the rail-formed receiving frame opposite the new roll. Thereafter, the new embossing roller can be moved to the vacant working position and locked again.

Replacing a roller is often expensive. Numerous manual work is necessary. Mention should be the drive, the bearing lubrication, possibly the heating and the support of the roller. If the roller is heated, the roller to be replaced must first be time-consuming cooled and the new roller to be heated before starting production. Long downtimes and production downtimes can be the result.

The invention has set itself the task of creating a quick-change calender, which is inexpensive to manufacture and allows quick replacement of at least one roller.

This object is achieved by the reproduced in claim 1 quick-change calender.

The quick-change calender according to the invention is particularly suitable for the treatment of nonwoven, textile, plastic or paper webs. It has at least one nip, which is preferably formed by two rollers.

The quick-change calender comprises at least one movable magazine in which a roller is arranged together with at least one alternative roller.

Instead of the term "quick change calender", the term "calender" is used in the context of this document.

At least one roller is thus arranged together with at least one alternative roller in a movable magazine. The calender thus has a total of at least three rollers. It is conceivable that the calender has more than one nip, but preferably it has exactly one nip. In principle, it is conceivable that the calender has two or more movable magazines. The calender preferably has exactly one movable magazine.

In particular, the magazine can be moved in such a way that its center of gravity shifts.

The roller, which is arranged together with at least one alternative roller in a movable magazine, is preferably a roller involved in the nip, and most preferably one of two rollers forming the nip. Preferably, therefore, at least one of the two rolls forming the nip of the calender is arranged together with at least one alternative roll in a movable magazine.

The term "alternative roller" is referred to in the context of this publication, in particular a roller, which currently limits no nip, which processes a web, that is not in a working position, but in a parking position.

Preferably, the magazine is movable in only one direction, preferably back and forth.

The magazine is preferably movable in a direction which runs at least substantially perpendicular to the printing direction of the rollers of the nip.

Preferably, the rollers in the magazine immovable to each other (with the exception of the rotation about its own axis) arranged. Preferably, with the exception of rotation about its own axis, no movement of the rollers arranged in the magazine to the magazine takes place.

Preferably, by the method of the magazine, a roll change. By the method of the magazine is preferably at the same time the former work roll of the magazine in a parking position displaced and a former alternative roller of the magazine in the working position displaced.

Preferably, by the method of the magazine, the new work roll of the magazine can be moved directly into its working position, an additional draining or the like is therefore preferably unnecessary.

The magazine is preferably stiff in itself, so not designed articulated or otherwise deformable.

Advantageously, at least one of the rollers located in the magazine is driven, preferably oil circulation lubricated and most preferably heated. By the term "oil circulation lubricated" is meant in particular that the roller has rotary bearings which are lubricated by means of a lubricant circuit.

Preferably, the magazine has a stretched shape, that is curved straight or only slightly curved, preferably such that the roller in the working position of the magazine is freely accessible from above. In any case, the magazine preferably does not extend beyond the roller of the magazine in the working position.

Advantageously, the magazine is movable without manual intervention.

Preferably, the magazine is movable without changing the web guide.

In one embodiment, the magazine includes two rollers, in another embodiment three rollers or a larger number of rollers. The axes of the rollers located in the magazine preferably run parallel to one another.

The direction in which the magazine is movable, preferably runs perpendicular to the axis of the roller, which is arranged in the magazine and preferably together with a counter-roller, forms the nip. The direction in which the magazine can be moved is therefore preferably in the plane perpendicular to the axis of this roller plane. Since the web usually also runs perpendicular to the axis of the nip forming roller, can be created in this way a side of the web little space consuming calender.

In one embodiment, the magazine is translationally movable. All points of the magazine thus move in the same direction in a procedure.

In this embodiment, the magazine preferably extends essentially in one plane, ie it is flat.

In one embodiment, the magazine is linearly movable, ie along a straight line.

All axes of the rollers in the magazine can be arranged in the same plane.

The direction in which the magazine is movable, can run in Zuführungswarenbahnlaufrichtung. By the term "feed web web running direction" is meant in particular the direction in which the web runs in the region of the feed to the nip.

In one embodiment, the direction in which the magazine is movable is inclined to the feed web travel direction. As a result, for example, be created space for the supply of the web to the nip. It is conceivable for this purpose to incline the rest of the calender with horizontal feed or to provide the feed non-horizontally, in the vertical direction of printing of the rolls.

The rollers arranged in the magazine are preferably heatable. They have advantage over a bearing lubrication without touching seal, preferably with a labyrinth seal. More preferably, they have a bearing lubricating device, such as a lubricant circuit, with non-pressurized, only gravity following lubricant flow and the bearing lubricant means is preferably carried along with the magazine.

In one embodiment, the magazine is movable along a circular arc. In this way, additional space for the web guide can be provided on the outlet side. Here, in the case of heated calender rolls, cooling rolls may be provided for cooling the goods, which advantageously have a small distance from the nip. The magazine is preferably executed in this embodiment, even in the form of a circular arc. It is then preferably not flat, but preferably curved. Advantageously, in this embodiment, the magazine extends over less than about 120 degrees. The angular position of the bearing bodies of the rollers arranged in the magazine then preferably differs by less than about 120 degrees. Therefore, the bearing bodies of the rollers arranged in this magazine are preferably rotated by less than about 120 degrees in a process of the magazine. This is a particular advantage in an embodiment in which the rollers arranged in the magazine have a bearing lubrication without contacting seals and an unpressurized and only gravity following oil drain. Because such a bearing lubrication is still possible with a maximum low inclination of the bearing housing.

The bearing lubrication device is in one embodiment with the magazine entrained, so arranged on the magazine or in any other way with the magazine with movable.

The bearing lubrication device comprises in one embodiment a lubricating oil supply unit and preferably lubricating oil lines. The bearing lubrication device particularly preferably comprises lubricating oil return lines Gravity promotion, ie with a gradient. In one embodiment, the lubricating oil lines are rigid, so in particular do not include flexible hoses, such as bellows hoses. Preferably, no hinges for connecting the bearing body with the lubricating oil lines or for connecting lubricating oil lines with the lubricating oil supply unit or for connecting lubricating oil lines are provided together. This can reduce manufacturing costs and increase reliability.

Advantageously, the calendar includes a roll stand. The magazine is preferably mounted on the roll stand.

The magazine is preferably mounted by means of a guide - preferably a sliding guide - movable. In this way, the calender can be simple and inexpensive to manufacture. It has been shown that with such a sliding guide for receiving the magazine, the forces acting on the bearings of the rollers arranged in the magazine can be reliably transferred to the roll stand. Because comparatively high surface pressures can be accepted because at the time of moving the nip is preferably open and therefore only the much lower, resulting from the weight of the rollers arranged in the magazine forces acting. The sliding guide preferably comprises a rail. Preferably, the quick-change calender comprises on both sides exactly one sliding guide with exactly one rail. Both rails are preferably supported at least almost over their entire length by the roll stand of the calender, so that they are not or hardly bent and can be designed to save space.

The magazine may comprise two respective carriers arranged laterally of the calender, on the upper side of which the bearing bodies of the rollers of the magazine may be arranged and on the underside of which guide means may be provided, for example a region encompassing a rail. The carriers can be congruent viewed from the side. Advantageously, both carriers are supported at least almost over their entire length by the roll stand or any rail of the roll stand, so are not or hardly subjected to bending. In this way, they can be made compact and space-saving. It is conceivable that the carriers are connected end to end with a traverse, the magazine is thus frame-shaped.

Advantageously, at least one of the two rollers forming the nip (preferably a roller not arranged in the magazine) is an axle-supported, preferably deflection-controllable roller, for example a so-called floating roller. In addition to the benefits of deflection controllability, this provides a prerequisite for increasing the packaging space available to the magazine and guide as compared to an arrangement in which both rollers forming the nip are conventional rollers. The axis of the deflection-controllable roll preferably has a smaller diameter than the bearing of a corresponding conventional roll. The bearing of a conventional roll is usually in the same plane as the roll stand and the bearing of the counter roll. The bearing of the deflection-controllable roll is preferably offset from the plane of the roll stand.

It has been shown that the magazine and its guide on the roll stand is very space-saving executable. Especially with a preferred action of the roller arranged in the magazine against an axle-supported, deflection-controllable roller, the space between the bearing bodies is therefore sufficient. A costly increase in the roll diameter, compared with a corresponding calender without magazine, is therefore not required.

The mobility of the magazine is preferably motorized, such as with the aid of pressure cylinders, rotary motors (such as with racks combined) or dergleichem.

Advantageously, the rollers arranged in the magazine are electrically heated. The energy for this is very particularly preferably transmitted to the magazine via an energy chain. Preferably, therefore, not every roller is provided separately with an energy chain, but it is preferably provided exactly one energy chain to the magazine. Advantageously, an energy distribution is provided on the magazine, which directs this energy to the individual rollers arranged in the magazine.

In one embodiment, the rollers arranged in the magazine can be heated by means of a heat transfer medium. In this embodiment, preferably exactly one heat carrier medium feed and more preferably also exactly one heat carrier medium return of a heat transfer medium circuit is connected to the magazine. The connection is realized with advantage over swivel joints and / or suitable hoses, such as bellows hoses. Preferably, a distribution device is provided which directs the heat transfer medium from the magazine to the individual rollers arranged in the magazine and preferably returns them. Preferably, the main flow of the heat transfer medium through the arranged in the magazine work roll is feasible, so the roller in the magazine, which forms the nip together with a counter-roller. Further preferred is a secondary stream of this main stream branchable, which is guided by one or more alternative rollers of the magazine. In this way, the at least one alternative roller can be gently heated. The distribution of the heat transfer medium flow is preferably carried out by means of valves, which are further preferably arranged on the magazine. Preferably, rollers arranged in the magazine have a drive. Preferably, all rollers arranged in the magazine have a drive, preferably a separate drive. The rollers of the magazine are therefore preferably also driven in a parking position by means of these drives. This is advantageous because the rollers arranged in the magazine, which are in parking position, can then be heated up, in particular above 80 ° C., without any risk of deformations of these rollers. Advantageously, the roller drives of the rollers arranged in the magazine can be moved with the magazine.

Advantageously, a heat insulation hood is provided for at least one of the rollers arranged in the magazine. There may be several heat insulation hoods, such as for each heated roller exactly one. However, it is very particularly preferable for exactly one heat insulation hood to be provided for all rollers arranged in the magazine, which is more preferably provided above the roller arranged in the working position of the rollers arranged in the magazine. The heat insulation hood is preferably liftable during the process of the magazine. In one embodiment, both rollers forming the nip are provided with a heat insulation hood.

In one embodiment, the rollers arranged in the magazine differ in surface quality (such as engraving and / or coating and / or hardness). In this way can be done by a method of the magazine, a replacement of the surface quality.

In one embodiment, in particular in a quick-change calender for thermal bonding of nonwovens, at least one of the rollers arranged in the magazine is engraved and preferably cooperates with a smooth counter-roller. At least the engraved roll is preferably heated. The rollers arranged in the magazine preferably differ with respect to their engraving. In this way, by a method of the magazine, the gravure roll can be exchanged to produce different products in terms of appearance and / or feel and / or strength.

In another embodiment, in particular in a quick-change calender for calendering paper or textiles, at least one of the rollers arranged in the magazine has a covering. In this embodiment, the backing roll may be a heated smooth or engraved roll. The rollers arranged in the magazine preferably differ with regard to their type of covering and / or covering hardness. In this way, by a method of the magazine, a different type of coating and / or coating hardness can be used. By the method of the magazine and the lining of the now located in the parking position former work roll can be reground, which is particularly advantageous because wear takes place especially on the softer surface.

In the embodiment in which at least one of the rollers arranged in the magazine is heated, the rollers arranged in the magazine can preferably be heated and / or cooled to different temperatures. In this way, by a method of the magazine, a rapid temperature change of the roll surface of at least one of the rollers forming the nip can be brought about. This is particularly advantageous because heating or cooling of a roll to avoid temperature stresses in the roll material is usually only possible at 1 to 3 K / min. By the method of the magazine, therefore, a faster temperature change of at least one of the rolls in the nip can be brought about, as would be possible by heating or cooling of one of the two rollers forming the nip.

Advantageously, the magazine can be moved during ongoing production.

The invention also relates to a production facility with a quick change calendar according to the invention. Advantageously, means are provided for exchanging the roll located in the parking position or the rolls located in the parking position, preferably during ongoing production. The non-operational rollers can then be replaced without interrupting production, for reworking (eg grinding or re-engraving) or to bring other surface qualities into use.

The invention will now be explained in more detail with reference to several embodiments shown in the drawings. Show it:

1 a side view of a quick change calender according to the invention with linear magazine and exactly one alternative roller;

2 a side view of a calender according to the invention as in 1 but with two alternative rollers;

3 a page illustration of a calender as in 1 but inclined; 3a a Page display of a calender as in 3 but not inclined, with inclined feeding;

4 a side view of a calender with magazine movable along a circular arc;

5 a page illustration of a calender as in 2 , but with heat insulation hood;

6 a section of a cross section along the lines VI-VI in 1 ,

The whole with 100 designated calender has in all embodiments shown a roll stand 11 and one on this by means of a cylinder 10 mounted lower counter roller 2 on. The calender also has in all embodiments shown at least two in a magazine 6 arranged rollers 1 . 4 . 5 one of which is arranged in a working position, ie together with the counter-roller 2 a nip 3 forms.

With the help of the cylinder 10 , which is preferably present on both sides, the mating roll 2 against the roller in working position 1 are pressed in the magazine rollers.

The double arrow V symbolizes in the 1 to 5 the direction in which the magazine can be moved back and forth. The magazine 6 is in all embodiments shown perpendicular to the printing direction D of the nip forming rollers 1 . 2 traversable. The direction of travel V is also always perpendicular to the axial direction A of the roller gap forming roller 1 of the magazine. The one in the magazine 6 arranged rolls are, with the exception of a rotation about their axes, immovable to each other. All arranged in the magazine rollers are therefore only simultaneously displaced. In the in the 1 . 3 . 3a and 4 shown embodiments is in addition to the nip forming roller 1 of the magazine 6 just exactly one more alternative roller 4 intended. However, the number of alternative rollers is arbitrarily expandable. For example, the show in the 2 and 5 embodiments shown two alternative rollers 4 . 5 ,

In the in the 1 . 2 . 3 . 3a . 5 and 6 As shown embodiments, the magazine is linearly movable. In the in 4 the embodiment shown is the magazine 6 traversable along a circular arc B.

3 shows an embodiment in which the calender is slightly inclined, such as additional space for the supply 7 the web 15 to accomplish. In principle, if a non-horizontal feed web travel direction Z is permissible, it is also conceivable to tilt not the entire calender but only the feed ( 3a ).

In all embodiments shown is a sliding guide between the magazine 6 and the roll stand 11 provided as they are in 6 is shown closer:
The roll stand 11 has a rail 14 along with a section of the magazine embracing the rail 6 the sliding guide 8th forms. The nip 3 is - about a procedure of the magazine 6 - by means of the cylinder 10 that on the counter roll 2 works, open. At the time of the magazine's operation, therefore, only the forces resulting from the self-weight of the rollers in the magazine, which are much lower than those of the closed-nip forces, act on the sliding guide 8th , As 5 shows is the roller in working position 1 of the magazine 6 by means of a heat insulation hood 9 thermally isolable. This hood is in front of a procedure of the magazine 6 liftable (which is indicated by the arrow P in 5 is symbolized), so that exactly one heat-insulating hood is sufficient for a plurality of rollers arranged in the magazine.

The magazine 6 includes two each side of the calender 100 arranged carrier, at the top of the bearing body 13 are arranged and on the underside guide means are provided, in the embodiment shown in each case a rail 14 encompassing area. The carriers are congruent viewed from the side. In the 1 to 5 is therefore only a carrier 17 recognizable. Both carriers are always over their entire length from the roll stand 11 supported, so are not bent. The same applies to the rails 14 of the roll stand 11 ,

The 3 . 3a and 4 show that the calender on the outlet side chill rolls 12 for cooling the goods, which, as shown, a small distance from the nip 3 exhibit.

All in the magazine 6 located rollers are by means of bearing body 13 having bearings on the magazine 6 rotatably mounted. 4 shows that even with a movable magazine along a circular arc 6 the bearing body during the process only by a small angle α are rotated. Therefore, a bearing lubricator may be provided with lubricating oil return lines with gravity feed. The angular position of the bearing body in the in 4 arranged magazine arranged rollers differs by less than about 120 degrees, namely about 20 degrees.

6 shows that the counter roll 2 as an axle-supported, deflection-controllable roller 16 is executed. This has a hollow roller which is mounted on a continuous, non-rotatable crosshead.

6 also shows that the diameter r of the axis 18 the deflection controllable roller 16 is less than the diameter R of the bearing 19 (more precisely: bearing body 13 ) of a corresponding conventional roller. Camps 19 the in 16 upper, conventional roller are in the same plane E as the roller stand 11 (more precisely: in the same plane E, as the carriers 17 of the magazine 6 ). Camps 20 the deflection-controllable roller 16 are offset from the roll stand 11 arranged (in 6 to the right). The installation space U, the magazine 6 and the sliding guide 8th is available, is larger than would be the case with two conventional rollers. And the magazine 6 and the sliding guide 8th are so space saving that at the in 6 partial calenders shown without a costly increase in the roll diameter enough space U for the magazine 6 and the sliding guide 8th is available.

LIST OF REFERENCE NUMBERS

100

 Schnellwechselkalander

1

 Nip forming roller of the magazine

2

 Nip forming counter roll

3

 nip

4, 5

 Alternative rolling of the magazine

6

 magazine

7

 feed

8th

 slide

9

 Heat insulation cover

10

 cylinder

11

 roll housing

12

 chill roll

13

 bearing body

14

 rail

15

 web

16

 axle-based, deflection-controllable roller

17

 Carrier of the magazine

18

 Axle of the deflection-controlled roller

19

 Bearing a conventional roller

20

 Bearing of the deflection-controlled roller

α

 angle

B

 arc

D

 print direction

e

 Level of the carrier of the magazine

P

 arrow

r

 Diameter of the axis of the deflection-controlled roller

R

 Diameter of a bearing of a conventional roller

U

 space

V

 Magazinverfahrrichtung

Z

 Zuführwarenbahnlaufrichtung

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3422091 C2 [0003]

Claims (10)

Quick change calender ( 100 ) in particular for the treatment of nonwoven, textile, plastic or paper webs with at least one nip ( 3 ), characterized in that the quick-change calender ( 100 ) at least one movable magazine ( 6 ), in which a roller ( 1 ) together with at least one alternative roller ( 4 . 5 ) is arranged. Calender according to claim 1, characterized in that the magazine ( 6 ) is movable in a direction (V) which is at least substantially perpendicular to the printing direction (D) of the rollers ( 1 . 2 ) of the nip ( 3 ) runs. Calender according to claim 1 or 2, characterized in that the magazine ( 6 ) is linearly movable. Calender according to one of claims 1 or 2, characterized in that the magazine ( 6 ) along a circular arc (B) is movable. Calender according to one of claims 1 to 4, characterized in that the magazine ( 6 ) by means of a sliding guide ( 8th ) is movably mounted. Calender according to one of claims 1 to 5, characterized in that at least one of the two rollers forming the nip ( 1 . 2 ) an axle-based, deflection-controllable roller ( 16 ). Calender according to one of claims 1 to 6, characterized in that in the magazine ( 6 ) arranged rollers ( 1 . 4 . 5 ) are electrically heated and the energy for this purpose via an energy chain to the magazine ( 6 ) is transferable. Calender according to one of claims 1 to 6, characterized in that in the magazine ( 6 ) arranged rollers ( 1 . 4 . 5 ) are heatable by means of heat transfer medium and exactly one heat transfer medium flow and exactly one heat transfer medium return of a heat transfer medium circuit with the magazine ( 6 ) connected is. Calender according to one of claims 1 to 8, characterized in that all in the magazine ( 6 ) arranged rollers ( 1 . 4 . 5 ) have their own drives. Calender according to one of claims 1 to 9, characterized in that a heat insulation hood ( 9 ) is provided.

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