EP0900297B1 - Device for liquid treatment of a textile web - Google Patents

Description

The invention relates to a device according to the preamble of claim 1.

Such devices or device parts come primarily in jiggers, the two in one housing at the same height next to each other, parallel, comprise reversibly driven winding rollers, between which the web can be wrapped. Among the A container arrangement is provided through winding rollers which the web when wrapping one winding roller is passed through to the other before going to the other winding roller is being wound up. That the pools of the pool arrangement assigned to the winding roller and form the winding roller itself the device affected by the invention.

A jigger in which the generic device is realized from DE 36 12 999 C2.

Lately exists due to the fashionable Development a particularly high need for thin, almost translucent fabrics made of acetate or viscose based on to be colored by a jigger uni. On the part of Equipment supplier for working speed and capacity of the individual chews always higher demands posed.

It has been shown that webs of the addressed Kind up to a length of about 1000 m without problems on the usual jiggers with winding rollers with a Have a diameter of about 300 mm processed. If but with such thin webs of wear on the order of magnitude from 3000 to 5000 m wound on a pillar there are difficulties with the Uniformity of coloring. The supplier demands that the guide roller is not on the winding being formed the winding roller is applied, because otherwise with the usual closed guide rollers a squeeze of the Goods web occurs, the major portions of which by the Material web of coloring liquid taken from the container removed from the web. Because those in question The color was not particularly like acetate or viscose readily accepting is a large number of passages on the jigger required to get the necessary uniformity to bring about the coloring. There is not enough coloring liquid "wrapped up". On the other hand, it is for one impeccable formation of the wrap, especially in the thin indispensable in many layers of superimposed webs, influence by the guide roller to take the cylindricity of the wrap and give it a certain To give hardness, because the wrap would otherwise be too unstable is.

These two demands run counter to each other.

The invention has for its object a generic To design the device so that it also the winding of the described multi-layer winding or Chewing becomes possible without the treatment liquid applied too much is removed from the web.

It was surprisingly found that the solution to this Object by the invention reproduced in claim 1 is possible.

The guide rollers, which are attached to the winding from below rest on the winding roller, exist at the stand the technology of closed cylindrical rollers. This form with the winding a kind of nip, in which a part the treatment liquid carried by the web was squeezed off the web, so that before the Gap formed a liquid bead, the content of which Goods web was withdrawn.

In the case of the invention, however, that of the web carried liquid offered evasive options. No more bulge forms in front of the gap, but instead it occurs at the beginning of the fluid under a certain Web tension in circumferential direction the guide roller into the recesses and is in the Leaving the gap from the web at least to one largely resumed, so that the squeezing effect is omitted or at least only in a significantly reduced amount Scope exists. Because of the otherwise cylindrical Shape of the circumference of the guide roller can be this but still exercise wrap-forming function, so that cylindrical coils with the necessary strength.

A jigger from CH 471 926 A is walking along the hill adjacent guide rollers emerge, the helical Have circumferential grooves that drain the liquid from the nip between the guide roller and the winding should. This is in contrast to the invention who just temporarily held the liquid shall be.

The recesses can be used as depressions of the guide roller circumference be formed (claim 2), i.e. a closed one Have soil.

The alternative possibility is that the recesses as continuous in the interior of the guide roller Breakthroughs of the guide roller jacket are formed (Claim 3).

Here, a part of the recesses occurs absorbed treatment liquid into the interior of the Guide roller. With the short loop and the desired high working speed remains in the area of the recesses, even if they are not actually Have "bottom", so much treatment liquid, that the web of material leaves the gap retrieve a sufficient amount of treatment fluid can.

At a first, preferred Embodiments are the recesses by isolated, surrounded by the cylindrical circumference of the guide roller Perforations formed (claim 4).

The recesses are expedient according to claim 5 axially parallel surface lines arranged and in neighboring Surface lines offset axially to one another Even coverage of the web width with recesses to generate and the emergence of stripe-shaped Zones of different treatment with treatment liquid to avoid.

Such recesses are useful as axially parallel Long perforations designed (claim 6).

If there are continuous recesses, so Breakthroughs of the guide roller tube is, this can consist of perforated sheet or grid material, the openings form the openings (claim 7).

If the guide roller corresponds to the web width has a greater length of, for example, 4 m or 5 m, it is recommended to have a continuous stable pipe axis to be provided and that from the openwork material existing guide roller tube from the inside through the length distributed blanks supported on the tube axis.

In an alternative embodiment, the Guide roller according to claim 8, a closed cylindrical Inner roller, on which a perforated plate lies directly on it or mesh material are attached. Resulting from this at the recesses "depressions", the Inner tube represents the "bottom of the wells".

Depending on the type of treatment liquid and in particular of the goods to be processed is the open one Total area of the openings in the circumference of the guide roller 10 to 50% of the circumferential surface of the same (claim 9).

Exemplary embodiments of the invention are shown in the drawing shown.

Fig. 1 shows a schematic front view of a the embodiment of the invention jiggers;

2 and 3 show views, partly in section, two possible embodiments of the guide roller.

The jigger designated 100 as a whole in FIG. 1 comprises a housing 1, which from a frame 1 ' Steel profile beams is held. The housing 1 has parallel to each other behind or in front of the drawing plane vertical end walls 2 and connecting them vertical side walls 3.4 with openings through trough-shaped Lids 5,6 are closable on the not shown Handlebars in the positions shown in dashed lines 5 ', 6' above the ceiling 7 of the jigger housing 1 are shiftable to the Einchulen or Auskaulen or the Allow cleaning of the Jiggers 100.

The housing 1 has a in the lower area floor covering the whole floor plan, which makes it easy recessed liquid trough 9 forms. Above the floor 8 about halfway between this and the ceiling 7 of the Housing 1 are in the housing 1 in the same horizontal Plane driven winding rollers parallel to each other 10.20 stored. The web 11 is shown in FIG Working phase of the winding 20 'on the winding roller 20 unwound and onto the winding roller 10 to form a winding 10 ' wound up. The winding 20 'on the winding roller 20 includes almost the entire meter and has a diameter of, for example, 130 cm. To the housing 1 between to be able to keep the side walls 3.4 narrow, protrudes Wrap 21 a little into the trough-shaped cover 6.

From the bottom 12 of the liquid trough 9 forming Part of the bottom 8 extends two mutually parallel relatively narrow containers parallel to the winding rollers 10, 20 13.14 down, the lowest possible Cross-section and thus the smallest possible capacity exhibit. In the same height in the floor plan area containers arranged between the winding rollers 10, 20 13, 14 is only one deflection roller 15, 16 from for example housed 120 mm diameter. The web 11 is coming from the winding roller 20 from above the lower part of the deflection roller 16 of the right container 14 guided around while standing in the container 14 Soaked liquid. One with a distance above the Deflection roller 16 arranged above the liquid level Deflection roller 18 ensures that the deflection roller is wrapped around it 16 by more than 180 °. The web 11 is then from the top of the pulley 18 substantially horizontally over a distance above the pulley 15 deflection roller 17 arranged in the left container 13 and from there downwards by more than 180 ° around the pulley 15 guided to the left of FIG. 1 after to run up onto the winding 10 'on the winding roller 10.

The containers 13, 14 can be connected via a connecting pipe 19 can be connected to one another with a valve 21. In the Containers 13, 14 are separately controllable heaters in the form of heating tubes 23.24 for indirect heating of the in treatment liquid located in the basin 13, 14 (through which oil flows or electric heating elements) and in the form of Steam jet pipes 25, 26 for direct heating of the treatment liquid be provided.

The walls of the pools 13, 14 are so close to that Deflection pulleys 15, 16 built around as it is practicable is to keep the volume of liquid small.

Fresh treatment liquid is fed through the feed pipes 27.28 fed, the level in the basin 13.14 is continuously monitored.

When the web 11 from the pool 14 into the pool 13 (or vice versa), it happens in the Cross-section triangular coating tube 22, which in the sense of the arrow is adjustable in height and by lowering it System can be brought to the web. The string tube 22 streaks from the bottom of the web 11 liquid from which drips into a gutter 29 from where it is derived to be discarded or returned to the process to become.

Under both winding rollers 10, 20 are not shown on Vertical guides guide rollers / spreader combinations 30 vertically up and down in the direction of the arrows. The combinations 30 each comprise a guide roller 50, which in the upper, i.e. the winding rollers 10 and 20 adjacent Area provided on both sides of the web, end plates interacting with the vertical guide 32 is rotatably mounted.

Below the guide roller 50 is between the end plates 32 a triangular coating tube 33 parallel to one its axis pivotally mounted, which end pieces extending transversely at its ends 34 carries that outside the cross-section of the coating tube 33 connected to each other by an adjustable tie rod 35 are, depending on the move exercised for a more or less large deflection or bulging of the coating tube 33 against the web 11. Depending on the swivel position can the coating tube 33 with its polished Brush edge on the front or back of the Web 11 brought to attack or completely out of the way the web 11 are moved out. The pivoting takes place in the area of the cross section of the coating tube 33 located axis 33 '. The two guide roller-spreader combinations 30 are on each side of the web 11 each on a chain forming a flexible tension member 36 suspended above the winding rollers 10.20 Bearing deflection plates 37,38 is guided and one in between and higher drive pulley 39 in shape a chain sprocket happens, which on the drive shaft a rotary drive 40 is arranged by a hydraulic or pneumatic cylinder 41 with from the side engaging pinion is formed.

In the work phase shown, in the on The winding roller 10 is wound, the rotary drive 40 a predetermined torque in the direction of the arrow, so that the left guide roller / spreader combination 30 of is tightened below against the circumference of the winding 10 '. The guide roller 50 lies directly against the outer circumference of the winding 10 '.

The one assigned to the respective winding roller 10, 20 Guide rollers / spreader combination 30 follows true to the ending diameter of the one to be wound Wrap. The location of the guide rollers / spreader combination 30 is transmitted through the chain 36 into one Rotation of the chain sprocket 39, which with a rotary encoder 42 is rotatably connected, which corresponds to the angle of rotation, e.g. obtained photoelectrically or in a similar manner emits digital signals. These signals can be used for control the drive motor of the respective winding roller, in the example shown the winding roller 10 used become. The control is done so that the web 11 is wrapped at a uniform speed. It So must the speed of the winding roller 10 corresponding to the increasing winding diameter can be lowered.

So that a constant during the winding process Web tension is obtained, the drive motor must each unwinding winding roller, in the embodiment shown So the winding roller 20, with a certain Follow braking torque. To do this, is the deflecting roller 16 immersed in the basin 14 part of a compensator indicated only schematically 43, i.e. it is on handlebars pivotable about bearing points 44 45 stored. When the drive motor of the winding roller 20 runs too slowly, the deflection roller 16 moves while pivoting the handlebar 45 up into the dash-dotted line indicated location, which sends signals to the drive control which are given at a reasonable rate Acceleration of the drive motor of the winding roller 20 cause. The same applies if the speed is too fast Run of the drive motor of the winding roller 20.

Depending on the driving style and loading of the pools 13, 14 can do a variety of treatments with the Jigger 100 be carried out, when changing the treatment liquid due to the small volume of the pools 13, 14 only relatively small residual amounts of treatment liquid must be disposed of.

It is understood that the right in Fig. 1, the winding roller 20 associated guide roller 50 also formed is like the left guide roller 50 and when winding on the right winding roller 20 with a predetermined force of pressed down against the winding 20 'formed there becomes.

In order to chew on the jigger with very critical large amounts of very thin acetate materials, To be able to process viscose or the like are Guide rollers 50 formed in a special way 2 and 3 results.

The guide roller 50 of FIG. 2 comprises an inner roller 51 from a cylindrical closed roller tube 52 with End disks 53 arranged perpendicular to the axis, the roller journals 54 for storing the guide roller 50 in the end plates 32 wear. On the closed cylindrical outer circumference 52 'of the roller tube 52 is in the embodiment 2 a perforated plate 55 drawn, which a forms cylindrical peripheral surface 55 '. The guide roller 50 has recesses 60 on its circumference, which in the exemplary embodiment are formed by the perforated plate 55. The Recesses 60 are in the exemplary embodiment as axially parallel Elongated holes 62 designed. Perforated plate 55 has continuous punched recesses 60 which are evenly distributed over the outer circumference 55 'in this way, that there are no circumferential zones, that are never reached by a recess 60. In In the exemplary embodiment shown, the recesses 60 on surface lines parallel to the axis A of the guide roller 50 61 arranged and adjacent surface lines 61 offset against each other in the axial direction, so that the cover axial extensions of the recesses 60. In the illustrated embodiment has the guide roller 50 a diameter of about one tenth of the maximum Winding diameter, i.e. about 150 mm. The recesses 60 form elongated holes 62 with a width in the circumferential direction of 8 mm and a length of about 18 mm. The light ones Distances of the recesses 60 along a surface line 61 are 6 mm. The distances between the surface lines 61 in the circumferential direction amount to about 18 mm. At the guide roller 50 represent the recesses 60 wells, the one bottom in the form of the outer circumference 52 'of the roller tube 52 have. In the embodiment is the total open area of the elongated holes 62 is about 20% of the Total circumferential surface of the guide roller 50.

3 is instead of the roller tube 52, which of the guide roller 50 of FIG. 2 the stability gives a roller tube 56 of smaller diameter, corresponds to the outer diameter of the guide roller 50, provided which carries the roll neck 54 and whose length corresponds approximately to the working width of the guide roller 50. The end disks 53 carry a roller shell that in the left area of the guide roller 50 'only from a perforated plate 55, as is also the case in the guide roller 50 of FIG. 2 is present. To create the necessary stability, can the perforated plate forming the cylindrical outer periphery 55 ' 55 by spaced along the roller Discs 57 are supported on the roller tube 56.

In the middle area of the guide roller 50 'there is still the Forming the circumference 55 'of the guide roller 50' by a grid material 65 indicated, the lattice openings 63 the here form significant recesses 60 '. The cylindrical Circumferential surface 55 'is here the cylindrical Given envelope surface of the grid material 65 '. The lattice openings 63 are not offset in the lattice material 65 to each other. However, the grid openings are 63 in in this case so close together that irregularities the distribution of the treatment liquid are to be feared.

It has been shown that there are flawless wraps result when the guide roller 50 on the winding roller 10 one in connection with FIGS. 2 and 3 has described surface structure and with an im Individual case to be adapted only to the formation of the wrap 10 'serving abutment force from below onto the winding 10' is pressed. The openings 60, 60 'provide alternative spaces into which the treatment liquid carried along by the web 11 when circling the guide roller 50 and especially in the area between this and the winding 10 'formed gap can occur and from which it after leaving the gap back to the web 11 is delivered. This will impoverish the Material web 11 on treatment liquid taken out of the pool 13 counteracted and this in the desired sufficient amount wrapped in the winding 10 '. Yet finds a guide roller 50.50 'with its in essentially still cylindrical peripheral surface on the winding 10 'instead of its cylindricity and strength benefits.

Claims (9)

1. A device (100) for liquid processing of an endless textile web, comprising

   at least one driven take-up roller (10, 20) on to which the web (11) can be wound,

   a trough (13, 14) fillable with processing liquid, disposed below and extending along the length of each respective take-up roller (10, 12), and containing at least one deflection roller (15, 16) for the web (11), and

   a guide roller (50, 50') extending parallel to the axis of the take-up roller (10, 20) across the width of the web (11) and abutting from beneath the lap (10') forming on the take-up roller (10),

   wherein the web (11) can be passed into the trough (13), underneath and around the deflection roller (15), up to the guide roller (50) and on to the lap (10') through the gap between the guide roller (50) and the lap (10'),

      characterised in that
      the guide roller (50, 50') has isolated recesses (60, 60') on its otherwise cylindrical periphery (55') and surrounded by the said cylindrical periphery, the recesses being uniformly distributed around the periphery (55') and disposed so as to avoid opening-free zones extending in the peripheral direction.
2. A device according to claim 1, characterised in that the recesses (60, 60") are in the form of depressions in the periphery (55') of the guide roller (50, 50').
3. A device according to claim 1, characterised in that the recesses (60, 60') are in the form of openings in the guide-roller surface (55, 65) extending into the interior of the guide roller (50').
4. A device according to any of claims 1 to 3, characterised in that the recesses (60, 60') are in the form of perforations (62, 63).
5. A device according to claim 4, characterised in that the recesses (60) are disposed on generatrices (61) parallel to the axis, and in the case of neighbouring generatrices (61, 62) are axially offset from one another so as to produce an overlap in the peripheral direction.
6. A device according to claim 4 or 5, characterised in that the recesses (60) are in the form of slots (62) parallel to the axis.
7. A device according to any of claims 1 to 6, characterised in that the guide roller (50') comprises a tube made of perforated sheet-metal (55) or mesh material (65).
8. A device according to any of claims 1 to 6, characterised in that the guide roller (50) has a closed cylindrical inner roller (51) on which a perforated metal sheet (55) or mesh material resting directly thereon (75) is disposed and covers its entire periphery.
9. A device according to any of claims 1 to 8, characterised in that the total open area of the recesses (60, 60') makes up 10 to 50% of the peripheral area of the guide roller.

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