EP1394312B1 - Method for sizing textile webs or yarns - Google Patents

Description

The invention relates to a device and a method for sizing web or thread-like goods, in particular warp threads, with the features of the preamble of the independent claims.

The warp threads of a fabric are subjected to considerable mechanical stress during the weaving process. In order to avoid thread breaks during the weaving process as much as possible, it is known to finish warp threads before weaving. The sizing treatment gives the thread smoothness, compactness, strength, and resistance to mechanical stress such as breakage. The sizing is a weaving aid. It must be removed as completely as possible after weaving from the tissue.

It is already known to apply water to the yarn prior to sizing. Such a method is for example in DE-4 237 962 or in EP-1 203 840 described. The yarn is optimally prepared by the moisture absorption on the finishing. Due to the water content in the interior, the sizing essentially remains on the surface of the yarn, without appreciably penetrating into the interior of the yarn. In this way, sizing can be saved. Such pre-wetting is used, for example, in cotton-polyester blended yarns.

Moreover, it is known, for example, to treat pure polyester yarns / color chains twice with sizing, to improve the sizing assignment. A problem with the known devices is that due to the supply of the liquid in the individual treatment baths only one or the other type of treatment, namely water treatment / sizing or two-time sizing can be performed. The use of one and the same device for both types of treatment, however, is not possible.

From the German patent application DE 42 34 279 For example, the sizing of microfilament yarns of continuous filaments or microfilaments in the staple fiber field is known. The yarn is pre-wetted in a first bath in dilute sizing, squeezed off and then coated in a second bath with the finishing liquor of the final concentration. This is followed by a repeated squeezing.

The present invention is based on the object to provide a device which can be used both for sizing of warp threads with prior treatment with water and for two-times sizing treatment. According to the invention this object is achieved by a device and a method having the features of the characterizing part of the independent claims.

The device for sizing web-shaped goods is used in particular for sizing warp threads. The device has a first trough and a second trough for receiving a respective liquid. The goods are successively passed first through the first trough and then through the second trough. In this case, the second trough can be filled with sizing in a manner known per se. According to the features of the invention, the first trough is optionally filled with sizing or with water. In this way, a water-sizing treatment or a sizing-finishing treatment can optionally be carried out with one and the same device.

According to a preferred embodiment of the invention, the device has a switching arrangement. By means of the switching arrangement, the device can easily between a first operating mode and a second operating mode are switched. In the first operating mode, the first trough is filled with water. In the second operating mode, the first trough is filled with sizing. In both operating modes, the second trough is filled with sizing.

Particularly preferably, in the second operating mode, sizing can be conducted by means of a sizing feed into the second trough, and sizing is conducted in counterflow from the second trough into the first trough. The sizing is discharged by means of a drain from the first trough and then fed back to the second trough in the circuit.

According to a preferred embodiment, in the first operating mode, the sizing is removed with a sizing discharge from the second trough and recirculated to the second trough. The level of sizing in the second trough is chosen so that no sizing flows from the second trough into the first trough. By means of a water supply parallel water is fed into the first trough. By the outflow in the first trough water is discharged again and fed into the circulation of the first trough, in particular the water supply.

According to a further preferred embodiment, with the switching arrangement in the first operating mode, the sizing process in the second trough is connected to the sizing feed into the second trough. In the second mode of operation, the sizing operation in the second trough is closed and the drain in the first trough is connected to the sizing inlet into the second trough. In this way, the two operating modes can be switched with a simple switching arrangement by closing and opening corresponding sequences / inlets.

Particularly preferably, the switching arrangement has a three-way valve, of which one connection is in each case connected to the sizing inlet into the second trough, to the sizing process from the second trough and to the outlet from the first trough.

It is customary to provide a dipping roller in a sizing bath, which defines the position of the goods entering the bath in relation to the liquid level in the bath. According to a further preferred embodiment of the invention, a dipping roller is arranged in the second trough, the axis of which is adjustable in height. In this way, the position of the dipping roller in the second trough in the first and in the second operating mode can each be adapted to the level of the size in the second trough. In particular, if, as described above, in the second operating mode, sizing in the countercurrent principle is conducted from the second trough into the first trough, the sizing level in the second trough is higher in the second operating mode than in the first operating mode. By lowering or raising the axis of the fountain roller can be taken into account.

A particularly simple structural design results when the first trough and the second trough are formed in a common trough. The two troughs can be easily separated from one another by a partition wall arranged in the trough. As a result, the design effort for producing a device according to the invention for double sizing or for the preliminary application of water can be reduced. In particular, it is not necessary, such as in EP-1 203 840 shown to provide two successively arranged troughs. In the context of the present invention, the term trough is used throughout. It goes without saying that any type of liquid container, through which the goods can be guided, can be used in the context of the invention and is covered by the term trough.

The troughs can be provided in a conventional manner with measuring sensors for measuring the level of the liquid, in particular the sizing. Preferably, in the first operating mode, only the sensors in the second trough and in the second operating mode, only the sensors in the first trough are activated for measuring the sizing level. Activated in this context means that the measured values are taken into account, e.g. a control arrangement for the control of Schlichtzufuhr be supplied. In particular, when the sizing is done in the first trough in the counterflow principle from the second trough forth, a level measurement in the second trough is unnecessary.

According to a further preferred embodiment, heating arrangements can be provided in the first and in the second trough. The heating arrangements in the first trough serve in the second operating mode to heat the sizing in the first trough. In the first operating mode, these heating arrangements can be switched off.

According to a further preferred embodiment, a continuous flow heater for heating the circulated sizing is provided in a connection between the outflow from the first trough and the sizing inlet into the second trough. Thus, in the second operating mode, the sizing discharged from the first trough can be preheated before being returned to the second trough. This may be important because the product having the ambient temperature cools the sizing in the first trough when passing through the first trough. A heating of the silt removed from the second trough is in first mode of operation is not necessarily required because in the first mode of operation the product already has an elevated temperature due to the pretreatment with heated water when it enters the sizing bath.

A particularly simple construction of the device according to the invention results when the level in the first and in the second trough is defined by overflow edges. In the second operating mode in particular, the level in the second trough and preferably also in the first trough can be defined by overflow edges.

According to a further preferred embodiment, the switching arrangement is not only used for switching between a water and a finishing circuit in the first trough. The switchover arrangement can also be coupled to the above-described sensors for level measurement, the heating arrangements described above and / or the flow heater described above and / or a control for adjusting the level of the dipping roller in the second trough, so that by actuation of the switching arrangement respectively in the first or in second mode, the desired level sensors addressed, the desired heaters turned on and / or set the desired position of the fountain roller and optionally switched on in the second mode of operation of the water heater.

For carrying out the method of the present invention, in particular a device designed as described above is used. The goods are passed through a sizing bath in a second trough. According to the invention, before starting the treatment, a choice is made between a first operating mode, in which the goods are first hit by a water bath and a second mode of operation in which the goods are first passed through a sizing bath.

In the second operating mode, sizing is preferably introduced into the second trough. The sizing then flows in countercurrent from the second trough in the first trough and can be removed by means of a drain from the first trough and recycled in the second trough.

In the first operating mode, it is particularly preferred that sizing be removed from the second trough through a sizing discharge and returned to the second trough in the circuit. It is conceivable to supply the sizing via a sizing supply line, via which also fresh sizing is supplied to the trough. It is also conceivable to provide a separate sizing inlet, by means of which the circulated sizing is supplied. The level of sizing in the second trough is set in this operating mode so that no sizing can flow into the first trough. By means of a water supply water is fed into the first trough, discharged through the drain in the first trough and recycled to the first trough.

In the selection of the operating mode, in addition, in another preferred embodiment, the axis of a dipping roller arranged in the second trough can be adjusted in height such that its position relative to the level in the second trough corresponds to a predeterminable desired position. This ensures that the immersion depth of the product guided around the fountain roller in the sizing is always approximately the same.

According to a further preferred embodiment, the liquid level in the first trough or in the second trough is measured by means of measuring sensors. In the selection of the operating mode, preferably sensors in the first trough or in the second trough can be selectively activated and used for the following level measurement.

In addition, it is conceivable to heat the sizing in the second trough and preferably in the second operating mode in the first trough by means of heating arrangements. When selecting the operating mode corresponding heating arrangements can be activated.

In addition, it is conceivable to guide the sizing discharged from the first trough in the second operating mode through a continuous-flow heater before being fed into the second trough and thereby to heat it. The instantaneous water heater can also be switched on or not switched on when the operating mode is selected.

Figur 1

Eine schematische Darstellung der erfindungsgemässen Vorrichtung in einem ersten Betriebsmodus.

Figur 2

Eine schematische Darstellung der erfindungsgemässen Vorrichtung in einem zweiten Betriebsmodus.

Figur 3

Schematische Darstellung eines alternativen Ausführungsbeispiels einer erfindungsgemässen Vorrichtung in einem zweiten Betriebsmodus.

The invention is explained in more detail below in embodiments and with reference to the drawings. Show it:

FIG. 1

A schematic representation of the inventive device in a first operating mode.

FIG. 2

A schematic representation of the inventive device in a second operating mode.

FIG. 3

Schematic representation of an alternative embodiment of an inventive device in a second mode of operation.

1 shows a device 1 for sizing continuously conveyed goods, in particular warp threads K. The warp threads K are fed to the device 1 via a plurality of unspecified deflection rollers. The device 1 has a first trough 2 and a second trough 3. The troughs 2, 3, each serve to receive a liquid. FIG. 1 shows the device 1 in a first operating mode B1. In operating mode B1, the first trough 2 is filled with water W. The second trough 3 is filled with sizing S. As a result, the product K is first passed through a water bath and then through a sizing bath.

In the first trough 2 and in the second trough 3 squeezing rollers 22 are provided, between which the product K is carried out after exiting the liquid bath, so that excess liquid is squeezed. The first trough 2 and the second trough 3 are arranged in a common trough 15. A partition wall 16 separates the trough 2 from the trough 3. The first trough 2 is also delimited by an overflow edge 21a, which defines the level N1 in the first trough 2. Through the trough 5 and the overflow edge 21a, a compartment 23 is also defined, from which the liquid emerging from the first trough 2 can be removed via a drain 7. In the first trough 2 9 water W can be supplied via a water supply.

At the bottom of the second trough 3 a sizing process 8 is provided, by means of which sizing can be removed from the second trough 3. Above the second trough 3 is also a Schlichtzufuhrleitung 5 is provided, with which fresh sizing S in the second trough 3 can be supplied. Moreover a sizing inlet 6 is arranged, by means of which sizing discharged from the second trough 3 through the sizing process 8 can be recirculated to the second trough 3 in the circuit.

The device 1 has a switching arrangement 4. The switching arrangement 4 consists essentially of a three-way valve with three terminals 10a, 10b, 10c. The port 10 a is connected to the drain 7 from the first trough 2. The connection 10b is connected to the sizing inlet 6 in the second trough 3. The connection 10c is connected to the sizing process 8 of the second trough 3.

In the second trough 3, a fountain roller 13 is also arranged. The product K is wrapped around the fountain roller 13, so that it is reliably immersed in sizing S, which is contained in the second trough 3.

The fountain roller 13 is rotatable about an axis 14. The axis is arranged height-adjustable via bearings, not shown, so that the fountain roller 13 in different positions (shown schematically with 13 ') can be moved. In this way, the position of the fountain roller 13 can be adjusted to the level N of the second size S in the second trough 3.

In the first trough 2, a measuring sensor 17a for measuring the level of the liquid level in the first trough 2 and heating tubes 18 for heating the liquid in the first trough is also provided. In the first operating mode, the heating tubes 18 and the measuring sensor 17a of the first trough 2 are not active.

With the settings shown in FIG. 1 (operating mode B1), the product K is first treated with water and then sanded. In this mode of operation, the level N2 is below an overflow edge 21b formed in the region of the dividing wall 16. In this case, the level N2 is measured via a measuring sensor 17b in the second trough 3 and kept at the desired value. The sizing is fed back to the second trough 3 in the circuit from the trough 3 via the outlet 8 through the switching arrangement 4 by means of the sizing inlet 6.
[In the first operating mode, in the three-way cock 4, the port 10c is connected to the port 10b.]

Heaters 18 in the second trough 3 are used for heating the sizing S in the second trough. 3

Water is introduced with the water supply 9 in the first trough 2. The level N1 is defined by the overflow edge 21a. The measuring sensor 17a is not necessarily needed to measure the level. Optionally, however, the level N1 of the water in the first trough 2 can also be measured. The heaters 18 in the first trough 2 are not active. Water W is discharged via the drain 7 and recycled in the circuit by a valve 24, which is open in the first operating mode, via the water supply 9 to the first trough 2 via a spray device (unspecified).

In operating mode B1, therefore, a water-finishing treatment is carried out. By switching the switching arrangement 4 can be switched to a second operating mode B2, in which a sizing treatment is done.

In the second operating mode B2 (FIG. 2), the sizing discharge 8 in the second trough 3 is closed. As a result, due to the continuous supply of new size through the sizing supply line 5, the level N2 increases to the level defined by the overflow edge 21b. Simple S therefore begins to flow countercurrently (i.e., against the direction of movement of the product K) from the second trough 3 into the first trough 2. The first trough 2 therefore also fills with sizing except for the level N1 defined by the overflow edge 21a. The sizing is discharged via the drain 7 from the first trough 2 again. In contrast to the first operating mode, a tap 24 is closed in the second operating mode, so that the discharged sizing S can be guided to the switching arrangement 4. In the second operating mode, the connection 10a is connected to the connection 10b by the three-way valve, so that the sizing leaving the outlet 7 can be supplied to the sizing inlet 6 in the circuit.

In this second operating mode, the water supply 9 is switched off, so that no water W is fed into the first trough 2.

In the second operating mode, moreover, the dipping roller 13 is arranged in a higher position because the level N 2 of the size S in the second trough 3 is higher than in the first operating mode. The nominal position of the dipping roller is approximately such that the warp path runs up against the dipping roller before contact with the size. Moreover, in the second mode of operation, it is not necessary to measure the height of the sizing level in the second trough 3. The measuring sensor 17b is therefore deactivated. Instead, the height of the level N1 of the sizing S in the first trough 2 is determined with a measuring sensor 17a activated in the second operating mode B2.

At the same time, the size S is already heated in the first trough 2 in the second operating mode with heating arrangements 18.

• Der Hahn 24 wird geschlossen;
• Der Messsensor 17a wird aktiviert und der Messsensor 17b wird desaktiviert. Dies ist möglich, weil über die Kontrolle des Niveaus N1 im ersten Trog 2 indirekt auf das Niveau N2 im zweiten Trog 3 kontrolliert wird;
• Die Heizung 18 im ersten Trog 2 wird eingeschaltet;
• Die Lage der Achse 14 der Tauchwalze 13 wird in die gewünschte Position gebracht;
• Die Wasserzufuhr W in den ersten Trog 2 wird ausgeschaltet.

The mechanical switchover from the first to the second operating mode takes place with the three-way tap 4. At the same time, the following adjustments are made when switching between the first and the second operating mode:

• The tap 24 is closed;
• The measuring sensor 17a is activated and the measuring sensor 17b is deactivated. This is possible because control of the level N1 in the first trough 2 is controlled indirectly to the level N2 in the second trough 3;
• The heater 18 in the first trough 2 is turned on;
• The position of the axis 14 of the fountain roller 13 is brought into the desired position;
• The water supply W in the first trough 2 is turned off.

The amount of freshly fed via the sizing supply line 5 size depends on the amount of used sizing. Particularly preferred is the in EP-1 203 840 described method used to determine and maintain the Schlichtemenge.

The switching between the first and the second operating mode B1, B2 is particularly simple by means of a control unit not shown in detail. The control unit simultaneously actuates the three-way valve 4, the tap 24 and activates the heaters 18 in the first and in the second trough 2, 3 as required, and activates the suitable sensor 17a or 17b. In addition, the fountain roller 13 is moved to the desired position. Such Controls are known in the art and need not be described in detail.

FIG. 3 shows an alternative embodiment of a device B1 according to the invention in the second operating mode. The device in FIG. 3 corresponds to the device in FIGS. 1 and 2 with the exception that a flow heater 20 is arranged in the connecting line 19 between the outlet 7 from the first trough 2 and the three-way tap 4. In the second operating mode B2, the instantaneous water heater 20 heats sizing S discharged from the first trough 2. This prevents that due to the contact with cold goods K cooled sizing S is fed via the sizing inlet 6 into the second trough 3. The water heater 20 can also be activated or deactivated with the control unit (not shown) during the switching operation between the first and second operating modes B1, B2.

Claims (19)

1. Apparatus (1) for sizing web or thread products (K), in particular warp threads, having a first trough (2) to hold a liquid (S, W) and having a second trough (3) to hold a liquid (S),
   it being possible for the products (K) to be led successively firstly through the first trough (2) and then through the second trough (3) and
   it being possible for the second trough (3) to be filled with size (S) and
   it being possible for the first trough (2) to be filled with size (S) or with water (W) as desired,
   characterized
   in that the apparatus (1) has a changeover arrangement (4), by means of which the apparatus (1) can be changed over between a first operating mode (B1) and a second operating mode (B2),

   - in the first operating mode (B1), the first trough (2) being filled with water (W) and

   - in the second operating mode (B2), the first trough (2) being filled with size (S), it being possible for size (S) to be led into the second trough (3) by means of a size feed (5, 6),

   in that it is possible for size (S) to be led from the second trough (3) into the first trough (2) on the counter-current principle, and
   in that size (S) can be led out of the first trough (2) by means of an outlet (7) and fed to the second trough (3) again in the circuit.
2. Apparatus according to Claim 1, characterized
   in that, in the first operating mode (B1), size (S) can be led out of the second trough (3) by using a size outlet (8) and fed to the second trough (3) again in the circuit,
   in that the level (N2) of the size (S) in the second trough (3) can be chosen in such a way that no size (S) flows into the first trough (3), and
   in that, by means of a water feed (9), water (W) can be led into the first trough (2) and
   in that, by means of the outlet (7), water (W) can be led out of the first trough (2) and fed to the first trough (2) again in the circuit, in particular to the water feed (9).
3. Apparatus according to one of Claims 1 to 2, characterized in that, by using the changeover arrangement (4) in the first operating mode (B1), the size outlet (8) in the second trough (3) can be connected to the size feed (5, 6) for the second trough (3), and in that, by using the changeover arrangement in the second operating mode (B2), the size outlet (8) in the second trough (3) can be closed and the outlet (7) in the first trough (2) can be connected to the size feed (5, 6) in the second trough (3).
4. Apparatus according to Claim 3, characterized in that the changeover arrangement (4) has a three-way valve, from which in each case one connection (10a, 10b, 10c) is connected to the size outlet (8) in the second trough (3), to the size feed (5, 6) into the second trough (3) and to the outlet (7) from the first trough (2).
5. Apparatus according to one of Claims 1 to 4, characterized in that a dip roll (13) is arranged in the second trough (3) and in that the axle (14) of the dip roll (13) can be adjusted vertically, so that, in the first and in the second operating mode (B1, B2), the position of the dip roll (13) in the second trough (3) can be matched to the level (N2) of the liquid in the second trough (3).
6. Apparatus according to one of Claims 1 to 5, characterized in that the first trough (2) and the second trough (3) are formed by a common tub (15), and in that, in the tub (15), the first trough (2) and the second trough (3) are preferably separated from each other by a dividing wall (16).
7. Apparatus according to one of Claims 1 to 6, characterized in that in the first trough (2) and in the second trough (3) there are measuring sensors (17a, 17b) for measuring the level (N1, N2) of the liquid, and in that, in the first operating mode (B1), the sensors (17b) in the second trough (3) are preferably activated and, in the second operating mode (B2), the sensors (17a) in the first trough (2) are preferably activated in order to measure the size level (N1, N2).
8. Apparatus according to one of Claims 1 to 7, characterized in that heating arrangements (18) are provided in the first trough (2) and in the second trough (3), it being possible for the size (S) in the first trough (2) to be heated by the heating arrangements (18) in the second operating mode (B2).
9. Apparatus according to one of Claims 1 to 8, characterized in that, in a connecting line (19) between the outlet (7) from the first trough (2) and the size feed (5, 6) into the second trough (3), there is provided an instantaneous heater (20) for warming the size (S) in the second operating mode (B2).
10. Apparatus according to Claim 1 and one of Claims 5, 7 or 9, characterized in that the changeover arrangement (4) is operatively connected to a vertical adjustment for the dip roll (13) and/or operatively connected to a controller of the measuring sensors (17a, 17b) and/or operatively connected to the heating arrangements (18) and/or operatively connected to a controller for the instantaneous heater (20).
11. Apparatus according to one of Claims 1 to 10, characterized in that in the first trough (2) and in the second trough (3) there is provided a weir (21a, 21b) for defining a maximum level (N1, N2), the weir (21b) defining the level (N2) in the second trough (3) in the second operating mode (B2) and, preferably, the weir (21a) defining the level (N1) in the first trough (2) in the first operating mode (B1) and preferably in the second operating mode (B2).
12. Method for sizing web or thread products (K), in particular warp threads, in which the products (K) are led successively firstly through a first trough (2) and then through a second trough (3), in which method the products (K) are led through a size bath (12) in a second trough (3), and
    in which the products (K) are led either through a size bath (12) or through water (W) in a first trough (2),
    characterized in that
    before the start of the size treatment, a choice is made between a first operating mode (B1), in which the products are led through a water bath (W) in a first trough, and a second operating mode (B2), in which the products are led through a size bath (S) in the first trough, in that it is possible to change over between the first and second operating mode by means of a changeover arrangement.
13. Method according to Claim 12, characterized in that, in the second operating mode (B2), size (S) is fed into the second trough (3), size (S) is led from the second trough (3) into the first trough (2) on the counter-current principle, and size (S) is led out of the first trough (2) by means of an outlet (7) and fed to the second trough (3) again in the circuit.
14. Method according to Claim 13, characterized in that, in the first operating mode (B1), size (S) is led out of the second trough (3) by means of a size outlet (8) and fed to the second trough (3) again in the circuit,
    in that the level (N2) of the size (S) in the second trough (3) is set in such a way that no size (S) flows into the first trough (2), and
    in that, by means of a water feed (9), water (W) is led into the first trough (2), is led out through the outlet (7) in the first trough (2) and fed to the first trough (2) again in the circuit.
15. Method according to one of Claims 12 to 14, characterized in that the axle (14) of a dip roll (13) arranged in the second trough (3) can be adjusted vertically in such a way that the position of the dip roll in relation to the level (N2) in the second trough (3) corresponds to a pre-determined intended position.
16. Method according to one of Claims 12 to 15, characterized in that the level of the liquid (W, S) in the first trough (2) and/or in the second trough (3) is measured by means of measuring sensors (17a, 17b) and in that, in the first operating mode (B1), the level in the second trough (3) is preferably measured by using measuring sensors (17b), and in that, in the second operating mode (B2), the level (N1) in the first trough (2) is preferably measured by using measuring sensors (17a).
17. Method according to one of Claims 12 to 16, characterized in that, in the first and second operating mode (B1, B2), the size (S) in the second trough (3) is heated by means of heating arrangements (18) and, preferably, in the second operating mode (B2), the size (S) in the first trough (2) is heated by means of heating arrangements (18).
18. Method according to one of Claims 12 to 17, characterized in that the size led away from the first trough (2) in the second operating mode (B2) is heated by using an instantaneous heater (20) before being fed into the second trough (3).
19. Method according to one of Claims 12 to 18, characterized in that, by means of a changeover arrangement, in the first operating mode (B1) the measuring sensors (17b) in the second trough (3) are activated and/or the heating arrangements (18) in the second trough (3) are actuated, and in that, in the second operating mode (B2), by using the changeover arrangement (4), the measuring sensors (17a) in the first trough (2) are activated and/or heating arrangements (18) in the first instantaneous heater (20) are actuated, and in that, by using the changeover arrangement (4), a vertical adjustment of the axle (14) of the dip roll (13) is actuated and brought into an intended position.

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