EP0565884B1 - Method and device for discontinuously wet treating of materials in the form of strands - Google Patents

Abstract

The invention relates to the discontinuous wet treatment of a hank of fabric in at least one cycle of the fabric through a treatment compartment. In order to achieve a rapid and reliable wet treatment with a relatively simple construction, the treatment compartment is divided into two treatment chambers which lie parallel adjacent to one another, so that with each circulation of the fabric two sections of fabric running parallel to one another are treated simultaneously in two similar treatment chambers of the same treatment compartment which serve for the same type of treatment.

Description

The invention relates to a method for discontinuous Wet treatment of a strand-like web according to the preamble of claim 1 as well a device for discontinuous wet treatment a strand-shaped web according to the preamble of claim 3.

In such a wet treatment, textile active and Woven goods in strand form in at least one circulation transported a treatment compartment and thereby especially dyed, bleached or washed.

In this generally known from practice Technology is the goods or web at least once in its entire length through the treatment compartment drove through with fresh liquor, chemicals or also necessary mechanical influences in contact to come and in this way the necessary To bring about material or fleet exchange. Man strives to achieve relatively high speeds to work.

High speeds of circulation allow a relative low fleet ratio (the ratio of the quantity of goods to fleet amount), thereby reducing treatment times, fleet consumption and energy consumption kept relatively low can be. Have high circulation speeds but also considerable disadvantages: there are many an unsafe web run (for example due to knots or the like); high acceleration of the web often lead to undesirably large longitudinal pull; basic transportation problems also occur with extreme light and extremely heavy goods; through influences of foam and chemicals can be an undesirable Slip occurs during goods transport; further learns the surface of the web is often an undesirable one mechanical roughening.

You have already tried some of the previous ones to remedy the disadvantages that the Transport of the material web for its circulation by blowing of air or inert gas and simultaneous feeding is supported by the treatment fleet. Here is used at particularly high speeds. The mechanical engineering effort is also, however especially high.

From EP-A-419 825 a device is known in which continuously wet-treated a strand-shaped material web shall be. The web is thereby an obviously larger number of wet treatment chambers transported one after the other (continuously), which are usually clearly different from each other delimited individual treatment compartments with in essentially rectangular plan. An essential one The thought of this well-known version is too see that over the inlet ends of the individual treatment chambers arranged, rotatably driven Transport organs each in its drive speed possess changeable drive motor and that each one Treatment chamber its own level monitoring device assigned by which the current The filling level of each treatment chamber is monitored and can be controlled, i.e. the cascaded Treatment chambers are equipped so that for example, regardless of the just given Production speed of the webs practical the entire range from 0 to maximum as the web transport speed through every single chamber can be exploited. Accordingly, there should be also be ensured that even with strongly fluctuating Material qualities of pre-selected goods in the individual treatment chambers even without manual Intervention can be followed very precisely.

From EP-A-0 075 650 (preamble to independent claims 1 and 3) is also a device for Wet treatment of a strand-like textile goods web known. There is a larger one in this treatment device Number of treatment chambers, i.e. in the described Embodiments are eight treatment chambers one after the other or side by side arranged that they are from a web to be treated are traversed approximately helically, which is preferably done continuously, but possibly can also be done discontinuously, with each chamber contain the same or different fleets can. If discontinuous in this known embodiment will be worked one after the other all chambers and the whole device helical go through once, then the beginning the web from the last treatment chamber, for example the eighth treatment chamber first treatment chamber is returned. This well-known Device should according to the task there be designed in such a way that on can set a certain goods filling. Accordingly each chamber can display level indicators for have the maximum and minimum goods filling, so that the transport facilities both in the event of overcrowding as well as underfilling at least one chamber in the sense of influencing the quantity of goods can be controlled. For this purpose there is one continuous, lower roller common to all chambers provided with separate, one chamber each associated upper squeeze rollers cooperates in such a way that depending on the in each associated treatment chamber determined goods filling the respective upper squeeze roller is lifted off can be, if the web transport from the Chamber should be interrupted.

The invention is therefore based on the object of a method according to the preamble of claim 1 and a device according to the preamble of claim 3 to create, through which or through a strand-shaped Goods web with very reliable and relatively simple mechanical transport in a relatively short time Time of an intensive and gentle wet treatment can be subjected.

This object is achieved by the method features in the characterizing part of claim 1 as well by the device features in the characterizing part of the claim 3 solved.

Advantageous embodiments of the invention are the subject of subclaims.

While in the known version described last (EP-A-0 075 650i, for example eight treatment chambers helically from one to another be processed through the processing web (regardless of whether continuous or is carried out discontinuously), is according to the inventive method to a endless strand of fabric sewn together with each revolution through that in two of the same, parallel side by side lying treatment zones divided treatment compartment at the same time in two places in one and the same type of treatment treated by two in parallel running sections of this web the two treatment zones run parallel and simultaneously. Accordingly, the endlessly sewn web can in one and the same treatment compartment in two places at the same time with fresh fleet, chemicals or also applied with mechanical treatment agents will. If you compare this procedure with the known methods described above, then according to the invention the endlessly sewn together Goods web in two, so to speak, side by side arranged partial circulatory systems are wet treated, and compared to the known methods with very short turnaround times, for example with a transport speed of 400 m / min are sufficient transport speeds in the embodiment according to the invention of 200 m / min, for example, since two parallel web sections the two next to each other lying treatment zones one and the same Type of treatment (in the same treatment compartment) can run in parallel and simultaneously. By the The procedure according to the invention can thus be compared to the known methods - in the same period wet treat about twice the amount of goods (dye, bleach or the like), or the same Material quantity can be handled in about half the time will. It is also possible for the same amount of goods and same treatment times compared to the known versions particularly gentle treatment the respective web.

It is also advantageous if the web with several treatment cycles via transport rollers guided and when doing so in the transition from a treatment zone in the other at least partially treatment fleet is squeezed out of the web, whereby a particularly rapid fleet exchange was achieved can be.

The liquor ratio in this method according to the invention can be free in the range of 1: 2.5 to 1:10 to get voted.

In the device for discontinuous Wet treatment of a strand-like web is the only treatment compartment in a sensible way serving in two of the same type of treatment, parallel and simultaneously from two sections of the endlessly sewn together Goods run through, lying side by side Treatment chambers divided by two shopping carts formed with perforated walls and as a unit suspended in the manner of a pendulum scale are. This basket unit is a potentiometer assigned in such a way that in the case of unequal loading of the two shopping baskets a pendulum movement of the Cart unit can be scanned by the potentiometer and a load compensation control for the two shopping baskets can be activated. This way one can be extremely safe and reliable web circulation through an even distribution of the two shopping carts one Unity and therefore an extremely even one Wet treatment can be guaranteed.

It is also of particular advantage if the two treatment chambers in the manner in which Treatment compartment are arranged that the inlet end one treatment chamber right next to it the outlet end of the other treatment chamber and the connection between each outlet end and the neighboring one Inlet end formed by a transport roller is.

Fig.1

eine vereinfachte Perspektivansicht einer erfindungsgemäßen Diskontinue-Naßbehandlungsvorrichtung mit einer Warenkorbeinheit;

Fig.2

eine Vertikalschnittansicht durch die Vorrichtung, etwa entlang der Linie II-II in Fig.1;

Fig.3

eine stark vereinfachte Schemaansicht der Naßbehandlungsvorrichtung mit mehreren zusammengeordneten Warenkorbeinheiten.

The invention is explained in more detail below with reference to the drawing. Show in this drawing

Fig. 1

a simplified perspective view of a discontinuous wet treatment device according to the invention with a shopping cart unit;

Fig. 2

a vertical sectional view through the device, approximately along the line II-II in Figure 1;

Fig. 3

a greatly simplified schematic view of the wet treatment device with several shopping cart units arranged together.

The general structure of the device according to the invention (Discontinuous wet treatment device) first explained with the perspective view in Fig.1, in the only one treatment compartment 1 is illustrated, which for wet treatment (especially dyeing, bleaching, wash or the like) one endless sewn together strand-shaped web 2 is used in the direction of arrows 3 in at least one time Circulation through the treatment compartment 1 mechanically is transported.

The treatment compartment 1 is parallel and in two simultaneously from two web sections 2a, 2b continuous, adjacent treatment chambers 4, 5 divided for one and the same type of treatment. For the mechanical transport of the web 2 provide preferably designed as transport rollers 6, 7 Transport organs in the connection between the two treatment chambers 4, 5 are arranged.

As can be seen in Fig. 1, each treatment chamber has 4, 5 an inlet end 4a and 5a and an opposite end Outgoing ends 4b and 5b, and these two Treatment chambers 4, 5 are in the associated treatment compartment 1 arranged so that each the inlet end of a treatment chamber immediately next to the outlet end of the other treatment chamber lies, i.e. the inlet end 4a of the treatment chamber 4 lies immediately next to the outlet end 5b of the treatment chamber 5, while the outlet end 4b of the first Chamber 4 immediately next to the inlet end 5a of the second Chamber 5 is located. The connection between each end of the run 4b or 5b and the adjacent inlet end 4a or 5a is then through the associated transport roller 6 and 7 formed, with their axis of rotation 6a or 7a preferably parallel to and with the corresponding Distance over the immediately adjacent Partitions 8 and 9 between the two treatment chambers 4, 5 lie.

The two treatment chambers of each treatment compartment 1 are preferably with two baskets 4, 5 with perforated walls (see at 10 indicated perforation in Fig.1) formed. These two shopping carts 4, 5 are preferably as a unit (pair) like a Pendulum scale suspended, what in Fig.1 by a kind of balance beam 11 and a pendulum axis 12 indicated is by which the shopping cart unit 4, 5 at unequal Goods load in the direction of the double arrow 13 can rotate or commute.

This shopping cart unit 4, 5 is a potentiometer 14 assigned in such a way that in the case of unequal loading of the two shopping carts 4, 5 a rotating or pendulum movement the cart unit towards the heavier one or more filled shopping cart occurs. This pendulum movement in one direction or another the double arrow 13 can be scanned by the potentiometer 14, whereby a corresponding measurement signal to a forwarded control device 15 indicated only in a simplified manner from which a corresponding control signal to one of the two transport rollers 6 or 7 in the sense is passed that a load balancing control can be activated for the two shopping baskets 4, 5 is. The latter can be done easily a corresponding change in the rotational speed at least one of the two transport rollers 6 or 7 is reached will. For this purpose, the two transport rollers 6, 7 with separate drives with one each separate drive motor 16 or 17 (Fig.2) provided, so that they can be rotated at a separately adjustable speed are driven in the direction of arrows 6b and 7b can. The potentiometer is located with these drive motors 14 via the control device 15 in control connection.

From Figures 1 and 2 it can also be seen that everyone Transport roller 6, 7 a squeezing roller 18 and 19 respectively assigned. Each squeeze roller 18, 19 is - as in 2 can be seen in the left ejection roller 18 - in swivel arms 20 freely rotatable, namely in the way that each squeeze roller 18 or 19 optionally or, if necessary, against the associated transport roller 6 or 7 can be pressed, whereby between the two roller pairs 6 and 18 or 7 and 19 a pinch gap is formed, through which the web 2 to be treated is transported can be, so at least if necessary a part of the treatment fleet carried along from the web 2 can be squeezed, this squeezed Fleet then in the spout below 4b or 5b of the associated shopping cart 4 or 5 can flow back.

Regarding the design of shopping baskets 4, 5, see above can be made in any suitable form, suitable for the treatment according to the invention is. However, training is particularly preferred the shopping baskets 4, 5 each of the same size, U-shaped channels, as illustrated in FIGS. 1 and 2 is.

In addition, the shopping cart unit is preferred with the baskets 4, 5 in a treatment liquor 21 containing common treatment container 22 to be arranged. By an expedient kind of already above perforation of the cart walls mentioned penetrates on the one hand enough treatment fleet 21 in each in the Treatment liquor immersed in basket 4, 5 to is changed by this perforation 10 of the shopping cart walls at the same time an extremely good mixing of the Treatment fleet guaranteed during the treatment process.

1 and 2 also illustrate that in the area of the upper inlet end 4a or 5a each Treatment chamber or each basket 4 or 5 as well below the associated transport roller 6 or 7 of the strand-shaped web 2, nozzle-shaped Overflow funnel 23 is arranged. Below each overflow funnel 23 is also preferred another one that takes up the web and forwarding baffle 24 arranged. Any overflow funnel is for directional insertion of the web in the associated treatment chamber or the shopping cart 4 or 5 forming them, each overflow funnel 23 to a fleet line 25 is connected.

The design and arrangement of each overflow funnel 23 and its arrangement with the associated Baffle plate 24 optimally ensure that the one coming from the associated transport roller 6 or 7 Section of the strand-like web 2 clean and preferably with perfect pleating in the incoming end of the associated shopping basket 4 or 5 is introduced. It is sufficient to use the overflow funnel 23 and the downstream baffle plate 24 to be firmly arranged in a suitable manner or to be arranged together. However, it can also be an advantage if the overflow funnel 23 and the baffle 24 in are suitably supported adjustable, so that in If necessary, a subsequent readjustment of this Parts is possible.

Using the simplified schematic representation in Fig. 3 can also be seen that the invention Discontinuous wet treatment device, as previously used a single shopping cart unit with the shopping carts 4 and 5 (Fig.1 and 2) has been explained, too with several shopping cart units 1a, 1b, 1c in one and the same treatment tank 22 ' can, these shopping cart units 1a, 1b, 1c modularly next to each other in the common treatment tank 22 'arranged and for the same treatment process several running in parallel, each endless revolving webs in the same fleet bath 21 'are operable. This comes mainly for larger systems or devices in question, where then each shopping cart unit 1a, 1b, 1c with an optimal one Goods content (degree of filling) can work. Also here each shopping cart unit consists of two Shopping carts 4, 5 with perforated walls as it continues 1 and 2 have been explained in detail above is.

No matter whether the device with just a single shopping cart unit 4, 5 or more similarly constructed and modular shopping cart units next to each other is executed, each of these shopping cart units works after the one described above the same procedure, according to which every circulation of goods two parallel web sections 2a, 2b in two identical, side by side and treatment zones serving the same type of treatment (Treatment chambers or shopping baskets 4, 5) of the treatment compartment 1 treated at the same time in endlessly sewn together Strand shape for any number of rounds. It could then, for example, with these cycles occur due to slippage on the transport rollers 6, 7, that different web fill quantities in the two shopping carts 4, 5 of a unit are included. This can be done easily by the swinging suspension each shopping cart unit and the associated one Control can be compensated via the potentiometer 14, each shopping cart unit in the manner of a Pendulum scale is supported or suspended. If for example in the left shopping cart of a unit If there is less goods than in the right one, it tilts Shopping cart unit in the direction of the right shopping cart. This rotary or pendulum movement about the pendulum axis 12 is scanned using the potentiometer 14 so that via the control device 15, the drive for the Pull-out speed of the right shopping cart above and if necessary at the same time Pull-out speed for the other transport roller on left cart is corrected down.

A numerical example is the following the inventive Procedure - for example based on Fig.1 - again clarify:

It is assumed that there is one shopping cart unit Goods (a web) located in an amount of 150 kg; The running meter weight is 200 g / m, which means 5 running meters of web weigh 1 kg, so that the 150 kg of goods mean a web length of 750 m.

The target orbital period should be a maximum of 4 minutes. Would you follow the previously defined web one of the known methods described above wet treatment, the transport speed for the web circulation is at least 187.5 m / min, so that the entire length of the web is once the fleet bath goes through.

Since in the method according to the invention in the Way two each running parallel to each other Web sections in two identical, side by side Treatment zones (baskets 4, 5) of the same Treatment compartment 1 are treated simultaneously, the web only needs one transport speed to be transported at a maximum of 93.75 m / min, thus the entire length of the web in the mentioned Push the bath completely through for 4 minutes can. In contrast, is also the inventive Travel at the same speed as at worked with the known methods mentioned, that is with 187.5 m / min, then the round trip time for one round decreases the entire web (with treatment according to the invention) to 2 minutes, so that the wet treatment process then in compared to about half the time with the known methods.

If you compare the possibility of several such shopping cart units in a single common To arrange treatment containers in a modular manner, then the wet treatment performance multiplies the device so expanded by the number of used Shopping cart units.

Claims (11)

1. Method of discontinuous wet treatment of a hank of fabric (2), in which the fabric is transported in at least one cycle through a treatment compartment (1) and thereby subjected to a treatment process, characterised in that in each cycle through the treatment compartment (1) which is divided into two equal treatment zones (4, 5) lying adjacent to one another the fabric (2), which is stitched together in a continuous hank, is treated simultaneously at two locations with the same type of treatment, wherein two sections (2a, 2b) of this fabric (2) running parallel to one another pass parallel and simultaneously through the two treatment zones (4, 5).
2. Method as claimed in Claim 1, characterised in that in several treatment cycles the fabric (2) is guided over transport rollers (6, 7) and as it passes from one treatment zone (4, 5) to the other (5, 4) at least some treatment solution is squeezed out of the fabric.
3. Apparatus for discontinuous wet treatment of a hank of fabric (2), comprising a treatment compartment (1), with which mechanical transport elements (6, 7) are co-ordinated for at least one single circulation of the fabric (2) through this treatment compartment, characterised by the following features:

   a) the single treatment compartment (1) is divided into two parallel treatment chambers (4, 5) which serve for one and the same type of treatment which lie adjacent to one another and through which two sections (2a, 2b) of the fabric (2) which are stitched together in a continuous hank run simultaneously, these treatment chambers being formed formed by two baskets (4, 5) with perforated walls and being suspended as a unit so that they swing like a pendulum balance;

   b) a potentiometer (14) is co-ordinated with this basket unit in such a way that in the event of unequal fabric loads in the two baskets (4, 5) a swinging movement of the basket unit can be sensed by the potentiometer (14) and a load equalisation control for the two baskets can be activated.
4. Apparatus as claimed in claim 3, characterised in that the two baskets (4, 5) are arranged in the treatment compartment (1) in such a way that in each case the inlet end (4a, 5a) of one basket (4, 5) lies immediately adjacent to the outlet end (5b, 4b) of the other basket and the connection between each outlet end and the adjacent inlet end is formed by a transport roller (6, 7) as transport element, wherein the two transport rollers (6, 7) are provided with separate drives (16, 17) in the connection between the two baskets (4, 5) and can be driven at a variable speed, these drives being in control connection with the potentiometer (14).
5. Apparatus as claimed in claim 4, characterised in that a nozzle-shaped overflow funnel (23) through which the hank of fabric (2) runs is disposed in the region of the upper inlet end (4a, 5a) of each basket (4, 5) and also below the appertaining transport roller (6, 7), the overflow funnel (23) being constructed for aligned introduction of the hank of fabric into the basket and connected to a solution supply pipe (25).
6. Apparatus as claimed in claim 5, characterised in that a baffle plate (24) which takes up the hank of fabric and passes it on is arranged below the overflow funnel (23).
7. Apparatus as claimed in claim 6, characterised in that the overflow funnel (23) and the baffle plate (24) are held so as to be adjustable.
8. Apparatus as claimed in claim 4, characterised in that a press-out roller (18, 19) is co-ordinated with each transport roller (6, 7), the said press-out rollers being mounted so as to be freely rotatable in swivel arms (20) and being pressed as desired against the appertaining transport roller, forming a squeezer gap for the transported fabric (2).
9. Apparatus as claimed in claim 3, characterised in that the baskets (4, 5) are each constructed like U-shaped channels of equal size.
10. Apparatus as claimed in claim 3, characterised in that the two baskets (4, 5) of the unit are arranged in a common treatment tank (22, 22') containing the treatment solution (21).
11. Apparatus as claimed in claim 10, characterised in that several basket units (1a, 1b, 1c) are arranged in modular fashion adjacent to one another in one and the same treatment tank (22') and can be operated for the same type of treatment of several hanks of fabric which run parallel.

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