EP0264677A1 - Method and apparatus for the wet treatment of tubular textile fabrics - Google Patents

Abstract

The invention relates to the wet treatment, in particular of knitted tubular goods (1) in the tube-wide state, which are passed through a liquor bath in a first treatment compartment (3), then inflated to a balloon section and then passed tube-wide through a pinch gap (4). The incoming tubular goods are scanned for their swirl in strand form within the fleet bath, the incoming tubular goods being rotated in the area in front of the first treatment part in the sense of a swirl dissolution when a swirl is determined. The completely and stably relaxed and twisted tubular fabric leaves this first treatment compartment in a tube-wide, stable state and can thus be optimally guided through the following main treatment compartments.

Description

The invention relates to a method for the wet treatment of textile tubular goods, in particular knitted tubular goods, according to the preamble of claim 1. The invention further relates to an apparatus for performing this method.

Wet treatment methods and devices of the presupposed type are known in practice in very different versions. Such an embodiment is described for example in DE-OS-28 13 603. This is about the mercerization of textile tubular goods, the main thing being a uniform impregnation of the tubular goods with uniform tension. The tubular fabric is laid flat with multiple zig-zag deflections and fed to an impregnation bath, whereupon it is inflated like a balloon by blowing in air before it passes through a pair of squeeze rollers. In this known embodiment, several treatment compartments of the same type are connected in series for the purpose of impregnation and alkali treatment.

In recent years, the quality requirements for light knitwear have risen sharply, with the result that greater efforts have been made to treat these wrinkle-sensitive goods particularly gently. This can be special effectively done in the tube-wide condition of the tube goods.

A particularly difficult to treat tubular fabric is known under the term "single jersey". After knitting, this tubular fabric is completely in the crochet range. The moment the tubular fabric is wetted and swells in a first wet treatment stage, the tensions and twist contained in the knitted fabric dissolve (twisting within the tubular fabric). The strength of the twist depends on the number of systems in the knitting machine, the pitch and in particular on the yarn twist. Since each wet treatment stage is now completed by a dewatering device and this only works properly with hose-wide goods routing, the twist must be loosened in the first wet treatment compartment and the hose fabric relaxed.

For example, in the case of a circular knitted tubular fabric, the twist contained in the form of a helix can be partially compensated for in the dry state of the fabric by unscrewing the tubular fabric in wide-spreading machines, releasing it and laying it down tube-wide. In the case of a first contact with liquid, however, the tube material is often twisted with a further relaxation.

In practice, attempts have now been made to solve this problem in various ways. In some cases, this can be achieved with mechanical spreader bars at the inlet Wet treatment device and possibly with an upstream turning device that turns up the entire stock in the corresponding direction. Here, however, the tubular goods must be guided in such a way that there are no dwell or storage zones for the tubular goods within the device, since the tubular goods would then relax and twist accordingly.

The invention is therefore based on the object of creating a method of the type required in the preamble of claim 1 (and a device suitable for carrying it out) by means of which even relatively light knitted tubular goods and tubular goods which run with any twist in one operation n tube-wide condition can be wet treated.

This object is achieved according to the invention by the method features specified in the characterizing part of claim 1.

In this method according to the invention, the incoming tubular fabric is first deliberately brought into the form of a strand. Tubular goods can therefore be presented in a completely disordered state, the tubular goods being subjected to no mechanical deformations (such as, for example, by squeezing rollers) when they flow into the first treatment compartment and can therefore easily flow into strand form. This strand shape of the tubular goods then further favors the scanning of the - helical - or thread-like migen - swirls in the tubular fabric, this scanning expediently taking place within the liquor bath of the first treatment compartment.

If a twist or a twist of the tubular goods is detected in one direction or the other during this swirl scanning, then the tubular goods in the area in front of the first treatment compartment are rotated in a corresponding manner in order to largely dissolve the detected twist there. If no swirl is found in the incoming tubing within the bath, then the tubing in the area in front of the first treatment compartment need not be rotated.

The tubular goods that are monitored and controlled in this way can then be inflated during their further transport to a type of balloon section, which relaxes them so that they can be passed smoothly and without creases through the pinch gap provided at the end of the balloon section. The tubular material thus relaxed and squeezed can then advantageously remain in a subsequent storage zone in the tube-wide state, the preceding method steps ensuring that the tubular product remains twisted in the relaxed state during this lingering or intermediate storage. This results in ideal conditions for a subsequent further wet treatment, which can be carried out in any suitable manner, preferably continuously. With this wet treatment it can is a continuous dyeing, washing, bleaching or other finishing process.

If necessary, the tubular goods can also be treated discontinuously after the continuous passage through the first treatment compartment in the tube-wide state.

This method according to the invention also allows a particularly gentle treatment of light knitwear, such as. B. "single jersey", whereby the problem-free and arbitrarily long buffering of the relaxed and untwisted tubular fabric in the tube-wide condition is particularly noticeable as extremely advantageous.

A device for carrying out the method is based on the features according to the preamble of claim 5 and is characterized according to the invention by the features specified in the characterizing part of claim 5.

Further refinements of the invention are the subject of the remaining subclaims.

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

• Fig. 1 eine vereinfachte Längsschnittansicht durch den Einlaufabschnitt der Naßbehandlungsvorrichtung;
• Fig. 2 eine vergrößerte Detailansicht aus dem Bereich einer Drallabtasteinrichtung;
• Fig. 3 eine Aufsicht auf ein Walzenpaar der Drallabtasteinrichtung gem. Fig. 2;
• Fig. 4 eine weiter vereinfachte Schemaansicht einer Naßbehandlungsvorrichtung mit einem Einlaufabteil, wie es anhand der Fig. 1 erläutert ist;
• Fig. 5 eine andere Schemaansicht einer Naßbehandlungsvorrichtung mit einem etwas abgewandelten Einlaufabteil.

Show in the largely schematic drawing

• Figure 1 is a simplified longitudinal sectional view through the inlet section of the wet treatment device.
• 2 shows an enlarged detail view from the area of a swirl scanning device;
• Fig. 3 is a plan view of a pair of rollers of the swirl scanner according to. Fig. 2;
• FIG. 4 shows a further simplified schematic view of a wet treatment device with an inlet compartment, as explained with reference to FIG. 1;
• 5 shows another schematic view of a wet treatment device with a somewhat modified inlet compartment.

1, the inlet section of a wet treatment device is essentially explained first. An inlet compartment 2 is provided here as the first wet treatment compartment for a textile tubular fabric to be treated, in particular circular knitted tubular fabric 1. This substantially vertically aligned inlet compartment 2 contains at its lower end a liquor bath 3 and at its upper end, for example in the form of a pair of squeeze rollers 4, a squeeze device which has a squeeze gap for passing the tubular goods 1 in a tube-wide state. There is a deflecting unit at the bottom of the fleet bath 3 device, which in this case is formed, for example, by a deflecting roller 5 and deflects the tubing 1 running in the direction of arrow 6 approximately upwards. In the area between the liquor bath 3 and the pair of squeeze rollers 4, an air injection device 7 is provided, through which air (or another suitable gas) is inflated in a manner known per se onto the tubular fabric 1 running upwards in such a way that an air bubble or a Forms balloon section 8, which is delimited at its upper end by the pair of squeeze rollers 4 and possibly by an additional pair of guide rollers 9 and extends into the liquor bath 3 at its lower end.

In the area between the liquor bath level 3a and the deflection roller 5, a swirl scanning device 10 is provided within the liquor bath 3, through which the tubular fabric 1 combined in a strand runs and which will be explained in detail below.

In the inlet section of the inlet compartment 2, a ring 12 is arranged below an upper deflecting roller 11, which can be, for example, a stainless steel tubular ring and which is arranged and designed with its clear diameter such that it can be in any condition in a carriage 13 or the like. Delivered tubular goods 1 runs through this ring 12 and is thereby brought into a tubular shape, so that the tubular goods 1 at least up to the region of the liquor bath 3 runs in the form of a string, in which the swirl scanning device 10 is arranged, so that the tubular goods 1 can be scanned for their swirl in the form of a string. Above this swirl scanner 10 is the lower end of the balloon section 8, which is relatively unstable.

If necessary, the ring 12 (possibly with the deflecting roller 11 arranged above it) can be moved back and forth in the transverse direction of the inlet compartment 2, in order to promote optimal feeding and filling of the liquor bath 3 or a possibly upstream store in the case of narrow tubular goods.

Upstream of the ring 12, which serves to form the strand, the inlet compartment 2 is preceded by a rotating platform 14 receiving a hose supply (in the carriage 13). This rotating platform 14 can be rotated about a vertical axis 16 with the aid of a drive 15. In this way, the stock of tubular goods 1 present in the carriage 13 can be turned up in its twist in one or the other direction of rotation.

This rotating platform 14, in particular its drive 15, is connected via a control device 17 to the twist sensing device 10 in such a way that, depending on the result determined by the twist sensing device 10, it is driven with a left turn or a right turn or - if no twist in the tubular fabric strand 1 is determined - can be stopped or remain still.

1, 2 and 3, the swirl scanner 10 will now be discussed in more detail.

This swirl scanning device 10 contains two scanning rollers 18, 19 which are arranged parallel to one another and have a circumferential distance from one another which is adapted approximately to the strand thickness of the tubular fabric 1. The two essentially identical scanning rollers 18, 19 are mounted in bearings 20 and can be moved axially freely in the direction of the double arrows 21. Furthermore, these two scanning rollers 18, 19 are provided on their circumference with a plurality of annular grooves 22, at least the grooved peripheral surfaces of these scanning rollers 18, 19 being made of plastic. The two scanning rollers 18, 19 can be freely rotatably supported on swivel levers 18a and 19a (FIG. 2) in such a way that their circumferential spacing can be adjusted and the thickness of the tubular fabric strand can be adjusted so that the tubular tubular material 1 between these two scanning rollers 18th , 19 passes under circumferential contact.

As indicated in Fig. 3, the axis ends 18 b and 19 b of the scanning rollers 18, 19 are assigned proximity switches 23, by means of which an axial displacement of each scanning roller 18, 19 is determined in one direction or the other. Such an axial displacement indicates whether or not there is a twist in the tubular tubular material 1, the respective direction of the displacement, ie an opposite displacement of the two Tracing rollers 18, 19 to one another, indicating the presence of a swirl in the tubular goods and the corresponding swirl direction. A corresponding signal is then fed via a line 24 to the control device 17 via these proximity initiators 23. A control line 25 leads from this control device 17 to the drive 15 of the rotating platform 14, as a result of which this rotating platform drive 15 then receives a corresponding control signal, depending on the determined swirl scanning result in the device 10, namely whether the rotating platform 14 is turned to the left or to the right or stopped or should not be rotated at all.

With the help of the inlet section of the wet treatment device described so far, tubular goods 1 in their raw state (that is to say without prior spreading or special operations) can advantageously be fed from the storage trolley 13 via the ring 12. When the ring 12 passes through, the incoming tubular material 1 is brought into the form of a strand, in which it runs into the liquor bath 3 via the deflecting roller 5 and passes through the swirl scanning device 10 therein. If, in the manner described above, a twist present in the tubular fabric 1 is determined by the twist sensing device 10, then the rotating platform 14 with the stock of goods is rotated via the control device 17 and the drive 15 in the sense of dissolving the twist. The tubular goods 1 which continue to run upward then become one with the aid of the air blowing device 7 Balloon section 8 inflated and thereby relaxed. The wetting or impregnation of the tubular fabric 1 with liquor and the inflation of the tubular fabric 1 then lead to a relaxation of the tubular fabric to such an extent that it can be introduced into the pair of squeeze rollers 4 in the tube-wide and stable relaxed state at the end of the balloon section 8. This is a prerequisite for the tubular goods 1 to be temporarily stored in a storage zone with any storage compartments immediately afterwards, or to be able to linger.

The inlet compartment 2 can be assigned to any suitable continuous wet treatment device which is designed for tubular goods in the tube-wide state and in which, as already indicated, this inlet compartment 2 is followed by a goods store with at least one storage compartment for receiving and temporarily storing the wide tubular goods 1 coming from the nip roller pair 4 is.

An example of such a continuous wet treatment device is shown in FIG. 4 in a highly simplified schematic representation. In this FIG. 4, an inlet compartment 2 is provided in the inlet section of the wet treatment device, which in its structure and function corresponds exactly to that described above with reference to FIGS. 1-3. In this case, it is assumed that the tube-wide tubular goods 1, after passing through the inlet compartment 2, enter a goods store in the form of a Stay boot 26 is formed. According to this, the tubular fabric 1 can continue to pass through further compartments in a suitable manner in a perfectly tube-wide state, of which only a few boot-shaped compartments 27, 28 are indicated.

When executing the wet treatment device acc. Fig. 5 it is assumed that an inlet compartment 2 ein which is largely similar to FIGS. 1 to 3 is arranged as the first treatment compartment in the inlet section. In contrast to the first embodiment, however, it is assumed here that the strand-forming device is not in the form of a ring, but in the form of a curved, preferably U-shaped, tube-type feed tube 29, the outlet end 29a of which flows upward into the liquor bath 3ʹ and that in this case at the same time forms the deflection device for the tubular goods 1 at the lower end of the liquor bath 3ʹ. The swirl sensing device 10 can otherwise be designed in the same way as in the previous exemplary embodiment, the same also applies to the air blowing device 7, the squeeze device (pair of squeeze rollers 4) delimiting the balloon section 8 at the upper end and the rotating platform 14.

According to this embodiment. Fig. 5 assume that the inlet compartment 2ʹ is arranged in the inlet section of a continuous dyeing machine. The tube goods 1 coming in the tube-wide state first arrive in a kind of short intermediate goods store (roller store) 30 before they enter conventional ink application compartments 31 with subsequent fixings divide, wash compartments and the like. (as known per se), so that these tubular goods can be continuously colored, fixed, rinsed, oxidized, washed and dewatered continuously.

With regard to the use of the tube supply pipe 29 before the inflow of the liquor bath 3ʹ, it should also be mentioned that this and the funnel-shaped design of the lower end of the inlet compartment 2ʹ can be used with a particularly small amount of liquor.

It goes without saying that the method according to the invention and the device according to the invention can be optimally adapted to each type of aftertreatment in question, in any case also relatively light, circular knitted tubular goods and similar fold-sensitive goods are extremely gentle and - in the essential wet treatment sections - in tube-wide Condition can be treated, since the incoming tubular goods in the inlet compartment 2 or 2ʹ can be relieved beforehand reliably and stably and can be freed of the twist.

Claims (10)

1. A method for the wet treatment of textile tubular goods, in particular knitted tubular goods, in a tube-wide state, the incoming tubular goods in a first treatment compartment first being passed through a liquor bath, inflated to a kind of balloon section while blowing in a gas, and being passed tube-wide through a pinch gap,
characterized by the following features: a) The incoming tubular fabric passes through the liquor bath in the form of a strand and is sensed in its twist; b) depending on the determined twist sensing result, the incoming tubular fabric is rotated in the area in front of the first treatment compartment in the sense of dissolving a determined twist; c) the relaxed and squeezed tube goods are temporarily stored in the tube-wide state in a storage zone with at least one storage compartment. 2. The method according to claim 1, characterized in that the tubular fabric continuously passes through the first treatment compartment and is then subjected to a continuous further wet treatment in the tube-wide state. 3. The method according to claim 1, characterized in that the tubular goods continuously passes through the first treatment compartment and is then subjected to a discontinuous further wet treatment in the tube-wide state. 4. The method according to claim 1, wherein the balloon section of the tubular fabric passes through the first treatment department substantially vertically from bottom to top, characterized in that the upper end of the balloon section is delimited by the pinch gap, while the lower end of the balloon section unstably extends into the liquor bath and here the twist of the rope-shaped tubular goods is sensed. 5. Apparatus for carrying out the method according to claim 1, comprising a first treatment compartment (2) with a liquor bath (3) provided at its lower end, a deflection device (5) arranged below the liquor bath for the incoming tubing (1), an upper squeezing device (4) and with a gas injection device (7) for inflating the tubular goods running from the liquor bath to the squeezing device a balloon section (8),
characterized by the following features: a) In the inlet section of the first treatment compartment (2.2ʹ) in front of the liquor bath (3.3ʹ), a device (12,29) is provided for strand forming the tubular goods (1); b) in the area between the liquor bath level (3a) and the deflection device (5, 29) within the liquor bath (3,3 10) there is a swirl sensing device (10) passed through by the tubular fabric strand; c) the first treatment compartment (2, 2ʹ) is arranged in front of the strand forming device (12, 29) upstream of a rotating platform (14) receiving a tubular goods supply, which is connected to the swirl sensing device (10) via a control device (17), that it can be driven or stopped depending on the scanning result of the swirl scanner (10) with left or right rotation. 6. The device according to claim 5, characterized in that the strand forming device is formed by a ring (12) through which the tubular goods (1) can be passed. 7. The device according to claim 5, characterized in that the deflection device in the liquor bath (3) is a deflection roller (5). 8. The device according to claim 5, characterized in that the strand-forming device is formed by a curved, preferably approximately U-shaped, tubular tube feed pipe (29), the outlet end (29a) of which flows upward into the liquor bath (3ʹ) and at the same time forms the deflection device. 9. The device according to claim 5, characterized in that the swirl scanner (10) contains two parallel to each other, with a plurality of parallel circumferential grooves (22) provided scanning rollers (18, 19), between which the tubular fabric strand passes under circumferential contact and which is axially displaceable are mounted, the axis ends (18b, 19b) of the two scanning rollers being assigned proximity switches (23) for determining a twist in the tubular fabric strand, which are connected to the control device (17) for control purposes. 10. The device according to claim 5, characterized by a hose-wide guided hose product (1) designed continuous wet treatment device to which the first treatment compartment is assigned as an inlet compartment (2,2ʹ) and in this compartment a goods store (26,30) with at least one storage compartment to record and store the data from the Squeezing device (4) coming downstream tubular goods (1) is arranged downstream.

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