EP1731653B1 - Method and device for the uniform application of treating agents to a roped fabric - Google Patents

Abstract

The method involves circulating goods skein (4) in a cylindrical container by a venturi transportation nozzle. Treating agent is stored in an area that is separated from the skein. The agent is brought to a current goods skein with a time-dependently steered treatment agent amount per time unit, so that the agent is withdrawn from of the area and is introduced on the skein without blending with the agent that is running from the skein. An independent claim is also included for a device for implementing a method of applying of treatment agents on a goods skein in a dyeing machine.

Description

The invention relates to a method and a device for the uniform application of treatment agents on a strand of goods in a dyeing machine.

Nozzle piece dyeing machines have a closed container and a transport nozzle system through which, if necessary supported by a foreign-driven reel, an endless product strand is circulated in the container in a predetermined direction of rotation. To drive the fabric strand, the transport nozzle is subjected to a transport medium flow, which is a gas, air, steam or steam-air mixture flow in operating on the aerodynamic principle machines. In this type of dyeing machine treatment liquor is brought in the transport nozzle on the continuous endless strand of goods to act. The excess effluent treatment liquor is collected in the container and recirculated by means of a liquor circulating pump. See, for example. US-A-3,949,575 . US-A-4,001,945 . EP 1 526 205 A2 ,

In all the aforementioned dyeing machines applied to the product treatment agents (chemicals and / or dyes) are first filled in an existing outside of the dyeing vessel batching vessel there, if necessary, mixed and, if necessary, brought to a certain temperature and then by means of an additive pump in the liquor cycle Dyeing machine introduced. Usually, the treatment agents are metered in, i. At a certain point in time during the wet-treatment process, the amount of treatment agent contained in the batch tank, preferably finely atomized in the area of the transport nozzle, is injected and applied to the strand of goods.

Looking more closely at the treatment process, it can be seen that the concentration of treatment agent on the product line increases from strand to circulation, but that at the same time the concentration of treatment agent at the beginning of the product strand is lower than at the end of the product line. If the treatment agent is metered in, for example, over five runs of goods strand, a higher treatment agent concentration may even result at the end of the product strand at the end of the product strand than the equilibrium concentration would be. The equilibrium concentration is then reached only after a few more Strangum cycles.

For the treatment of a strand of goods with treatment agents, in particular for dyeing, however, it is considered an important prerequisite that as uniform as possible a treatment agent or dye distribution takes place over the entire length of the product strand. Only then is it to be expected that the color will be as uniform as possible, ie level.

In the German Patent Application 103 49 377 A1 Therefore, a method is disclosed which produces a substantially uniform treatment agent distribution on the product strand circulated in a wet treatment machine.

In this method, the endless strand of goods in a closed container by means of a venturi transport nozzle is circulated, which is acted upon by a gaseous transport medium. The circulation movement of the goods strand is maintained only by the gaseous transport medium and not by a fleet. First, the treatment agent is stored without contact with the product strand in a separate space from the product strand, which is, for example, a lying below the stored fabric strand space, which forms a treatment agent sump in the container. All required chemicals, dyes, etc. are introduced into this sump of the container. The liquid treatment agent contained in this space, ie the treatment liquor can be brought to a predetermined temperature and mixed, for example, via a corresponding circuit of the treatment agent injection circuit, without it coming into contact with the product. The space can also be provided outside the container, for example. In a separate vessel.

In a subsequent treatment step, the present in the form of the fresh treatment liquor treatment agent is applied with a time-controlled amount of treatment per unit time on the current strand of goods such that there is a substantially uniform distribution of the treatment agent on the fabric strand.

The application of the treatment agent on the product strand can be done via one or more Strangum circulations. By a corresponding intelligent control of the treatment agent injection into the transport nozzle, in the direction of travel before the transport nozzle and / or after the transport nozzle can be achieved with very few Strangumläufen (about 2 to 3 Strangumläufen) or even in a single strand of material circulation a uniform treatment agent order on the commodity length ,

The time course of the treatment agent application during the respective cycles of the product strand can be precalculated in a calculation model, in which case the treatment agent order then takes place in a controlled manner on the product strand in accordance with this calculation model. The pre-calculation of the treatment agent order on the product strand in the computing model is based on goods specific, construction-specific and treatment-specific data of the strand of goods and / or the transport nozzle and the application of transport medium. This data can be entered by the operator into the computer programmed with the computer model or also be automatically detected at the machine by corresponding sensors. The program of the computer automatically calculates a time-dependent application knowing the corresponding parameters and the computer model the treatment agent on the current strand of goods, which reaches an optimal distribution of the treatment agent over the length of the fabric strand in the least possible Strangumläufe.

The advantages of this method are that, on the one hand, a faster and more uniform distribution of the treatment agent to the entire product strand is achieved and thus the prerequisite for level dyeing is created. In addition, the treatment time is significantly shortened because the treatment agent is applied during much less Strangumläufe than is the case with the known methods described above the case.

Object of the present invention is to develop the described method according to the earlier patent application.

For this purpose, the method according to the invention has the features of patent claim 1. A new device for carrying out this method is the subject of claim 13.

In the new method, the treatment agent is removed only from the separate room and applied to the strand of goods without mixing with running off of the product strand treatment agent.

This ensures that the treatment agent always has the same concentration when applied to the product strand. The running of the product strand processing agent is performed separately from the transport nozzle supplied to the treatment agent and this is not added. This also results in a significant simplification of the process implementation, because there is no need to compensate for the change in the concentration of coming to the rotating strand of goods during the treatment treatment agent, for example, by a corresponding change in the volume flow of the supplied treatment agent or the rotational speed of the strand of goods , Such a balancing of the influence of the change in the concentration of the treating agent acting on the product strand via a control algorithm for determining the rotational speed of the feed pump and thus of the delivered volumetric flow is in fact not straightforward because such an algorithm contains a number of variables which are described in the Practice are not readily known (eg, water absorption of the textile, water retention capacity of the textile, exchange capacity of the fresh with the recirculated, old treatment agent within the transport nozzle, etc.). Since these parameters have no influence on the new method, which always works with treatment agents of the same concentration, the new method is also safe and reliable when used in practice.

Fig. 1

eine Stückfärbemaschine nach dem aerodynamischen Prinzip, in einer schematischen Querschnittsdarstellung unter Veranschaulichung des Zustands beim Vorbereiten des Behandlungsmittels in dem Ansatzbehälter der Färbemaschine,

Fig. 2

die Stückfärbemaschine nach Fig. 1 in einer entsprechenden vereinfachten Darstellung unter Veranschaulichung des Zustands beim Ablassen des Behandlungsmittels aus dem Behandlungsbehälter,

Fig. 3

die Stückfärbemaschine nach Figur 1 in einer entsprechenden vereinfachten Darstellung unter Veranschaulichung des Zustands beim Injizieren des Behandlungsmittels in die Venturi-Transportdüse, und

Fig. 4

die Stückfärbemaschine nach Figur ,1, in einer entsprechenden vereinfachten Darstellung, unter Veranschaulichung bei der Zugabe weiterer Zusatzmittel zu dem Behandlungsmittel.

Further developments of the invention are the subject of dependent claims and will become apparent from the following description of an embodiment of the method according to the invention, which is illustrated in the accompanying drawings. In the drawing show, in a schematic representation:

Fig. 1

a piece dyeing machine according to the aerodynamic principle, in a schematic cross-sectional illustration showing the state when Preparing the treatment agent in the batch tank of the dyeing machine,

Fig. 2

the piece dyeing machine after Fig. 1 in a corresponding simplified representation, illustrating the state during the discharge of the treatment agent from the treatment tank,

Fig. 3

the piece dyeing machine after FIG. 1 in a corresponding simplified illustration showing the state when injecting the treatment agent in the Venturi transport nozzle, and

Fig. 4

the piece dyeing machine after FIG. 1 in a corresponding simplified illustration, illustrating the addition of further additives to the treatment agent.

The in the FIGS. 1 to 4 schematically represented high temperature (HT) - Stückfärbemaschine has a pressure-resistant cylindrical container 1, in which a closable by a cover 2 operating opening 3, through which a strand of goods 4 can be introduced, the only in FIG. 1 is indicated. The product strand 4 is introduced via a foreign-driven reel 5 in a Venturi transport nozzle 6, to which a Abtafler 7 connects. The Abtafler 7 sets the emerging from the transport nozzle 6 strand of goods 4 in a store 8 from which the endless strand of goods through the reel 5 is pulled out again. The reel 5 and the transport nozzle 6 are housed in housing parts 9, the liquid-tight with the container 1 are connected. The product strand 4 was connected after insertion through the operating opening 3 at its ends to an endless loop of goods.

The transport nozzle 6 is acted upon by a gaseous transport medium flow, which causes the continuous strand of goods 4 in a direction indicated by an arrow 10 circulating in circulation. The transport medium is in the present case air or a vapor-air mixture, which is sucked out of the container 1 by a blower 11 and a suction line 12 and conveyed via a pressure line 13 into the transport nozzle 6.

On the container 1, a floater sump 14 is arranged below, which contains a Fleettensieb 15. The floater sump 14 is connected to a suction line 16 of a liquor circulating pump 17, whose pressure line 18 contains a heat exchanger 19 and opens into the transport nozzle 6 via a control valve 20. The liquor circulation pump 17 makes it possible to circulate from the container 1 via its fleet bottom 14 sucked liquor via the transport nozzle 6 and the container 1. Parallel to the heat exchanger 19 and the liquor circulating pump 17 may be a bypass line, not shown, which contains a shut-off valve and the sump 14 connects to the adjoining the heat exchanger pressure line 21.

In addition, a batch container 22 is provided which contains in aqueous solution, emulsion or dispersion a chemical treatment agent (chemicals, dyes) which can be fed via a treatment agent pump 23 and a connecting line 24 in the suction line 16 of the liquor circulation pump 17.

In the connecting line 24 is a shut-off valve 25, while parallel to the connecting line 24, a line 26 opening into the pressure line 18 of the liquor circulation pump is provided, which contains a shut-off valve 27 and leads directly into the neck container 22. A second connection line 28 containing a shut-off valve 29 connects the suction line 16 of the liquor circulation pump 17 to a drain line 30 of the makeup tank 22 in which a shut-off valve 31 and a treatment agent feed pump 32 are located and connected to a return line 33 on the pressure side of the treatment agent feed pump 32 , which contains a shut-off valve 34 and returns to the batch tank 22. With the return line 33, a Zusatzmittelbehälter 35 is connected on the one hand via a shut-off valve 36 containing drain line 37 and the other via a flushing or supply line 38 which includes a check valve 39. The additive container 35 may contain a suitable for the respective treatment step additive eg. Salt, which can be dissolved in the container by liquid, especially water, on the Behandlungsmittelförderpumpe 32 and the line 38 in the additive container 35 at a certain level above the drain line 37th introduced and the dissolved therein additive is then flushed through the drain line 37 and returned via the return line 33 into the approach tank 22.

From the suction line 16 of the circulating pump 17, a drain line 40 branches off, which contains a shut-off valve 41, which allows to discharge treatment agent from the container 1 or the sump 14, as indicated by an arrow 42. Finally, in the suction line 16 of the circulation pump 17 a check valve 43 is included, which allows the liquid side to completely separate the suction side of the liquor circulating pump 17 from the container 1 and the sump 14.

The various valves and pumps are program-controlled by a computer indicated at 44. The control connections to the main valves and pumps are in FIG. 1 illustrated by thin lines. At 45, manual input of commands and information into the computer 44 is possible.

For the sake of simplicity, the computer 44 with the associated control lines in the FIGS. 2 to 3 omitted.

The piece dyeing machine operating according to the aerodynamic principle described so far is operated according to the invention for the uniform application of treatment agents to the circulating goods strand 4 in the following manner:

In FIG. 1 a typical operating state of the piece dyeing machine is schematically illustrated: the valves 25, 27, 29 and 41 are closed. The treatment agent pump 23 is switched off, so that the batch tank 22 is completely separated hydraulically from the actual machine, ie the tank 1. In a first process step, the entire treatment agent, ie the complete treatment liquor, is applied outside the machine in the batch tank 22. In this case, additives, for example salt, can be introduced from the additive container 35 into the batch container 22 and thereby released. The line connections required for this purpose are in FIG. 1 shown pulled out thick. The dissolved additive is from the feed pump 32 with open valves 31, 34, 36, 39 conveyed via the lines 30, 33, 37 and 38 in the approach tank 22.

This preparation of the treatment liquor may be timed in parallel with and independently of the operation of the piece dyeing machine, i. the Stückfärbemaschine itself still works in another treatment step in which the circulating strand of goods 4 is treated with a present in the container 1 treatment liquor via the lines 16, 18, 21 with open valves 43, 20 by means of the circulation pump 17 via the transport nozzle. 6 and circulate the container 1.

At the beginning of a second in FIG. 2 illustrated treatment step, the additive contained in the additive container 35 is dissolved and completely added to the additive contained in the batch container 22. The valves 25, 27, 29, 31, 34 are closed. The treatment agent pump 23 stands still and the circulation pump 17 is switched off. The valves 41, 43 are opened, so that the entire treatment liquor originating from the previous treatment step is discharged from the container 1 via the discharge line 40, so that at the end of this treatment step the container 1 is completely emptied.

In a third process step, which in FIG. 3 is illustrated, the valves 25, 27, 31, 34, 41, 43 and 36, 39 are closed, while the lying in the second connecting line 28 valve 29 is opened. The treatment agent pump 23 stands still.

Since the connection between the neck container 22 and the container 1 is interrupted when the valve 43 is closed and the suction side of the circulation pump 17 is connected via the connecting line 28 with the Ansatzbehälterablauf 24, now in this process step located in the batch tank 22 treatment liquor is sucked by the circulation pump 17 from the batch tank 22 and via the lines 28, 18, 21 transported with the valve 20 open in the Venturi transport nozzle 6 and thus applied to the rotating textile material strand 4. From the pressure line 21 of the circulation pump 17 branches off via a valve 46 from a line 47, which opens into the container 1 in the region of its top and which allows, if necessary and depending on the particular treatment process, additional treatment agent from the pressure line 21 to divert and directly applied to the strand of goods 4 in the container 1.

The treatment liquor dripping from the circulating goods strand 4 during this treatment step is retained in the container 1 and taken up in the sump 14 serving as liquor collector below the container, so that the delineated goods strand located in the store 8 no longer contacts this collected treatment liquor.

Characterized in that the valve 43 is closed in the suction line 16 of the circulation pump, the circulating pump 17 and thus the Venturi transport nozzle 6 continuous strand 4 is always treatment liquor, ie treatment agent of constant concentration supplied directly from the batch tank 22. A mixing of the dripping from the product strand 4 treatment liquor with the fresh treatment agent contained in the batch container 22 is excluded, with the result that also no concentration changes of the treatment agent during application to the product strand 4 may result.

The application of the treatment agent to the circulating strand of goods 4 is controlled in the treatment step 3 by the effected by the computer 44 electronic control so that the treatment agent is applied evenly in a few strand circulations of the strand of goods on this. In principle, a strand circulation is sufficient to evenly apply the treatment agent in such a way that there are no changes in concentration of the applied treatment agent from the beginning of the strand to the strand end.

Incidentally, the computer 44 takes for uniform application of the treatment agent on the running strand of goods 4 on the circulation pump 17 and / or the control valve 20 in the pressure line 21 and / or the fan 11 or a throttle valve 48 of the pressure line 13 engagement. The computer 44 is programmed with a calculation model that has been calculated on the basis of product-specific and / or design-specific and / or treatment-specific data of the product strand 4 or the transport nozzle 6.

At the end of the process step, the valve 29 is closed, and the valve 43 is opened, so that now the container and sump 14 existing, drained from the product strand treatment liquor now circulates within the machine.

After the completion of the basis of the FIG. 3 explained treatment step in which the treatment agent is applied to the rotating strand of goods 4, if necessary, a further process step can be carried out, in the further additions to the treatment agent bath in the container 1 are entered. An example of this is in FIG. 4 illustrates:

The valves 20,46 are closed as well as the valves 41, 25, 29, 34, 31. The lying in the suction line 16 valve 43 is open as well as lying in the connecting line 26 valve 27. Thus, the circulation pump 17 in the Sump (sump) 14 contained fleet via the valves 43, 27 pump back into the approach tank 22. Since the valves 20, 46 are closed, no back-pumped treatment liquor can reach the container 1 or the transport nozzle 6. The treatment liquor pumped back into the preparation tank 22 can now be admixed with further additives in order to suitably adjust the properties and / or concentration for a subsequent treatment step. The conduction path via the valves 27, 42 is in FIG. 4 strongly drawn out.

If necessary, the treatment agent contained in the batch tank 22 can be circulated by opening the valves 25, 27 when the valves 43, 20, 46 are closed, so that the pumps 23, 17 can pump the treatment agent via the lines 24, 26 in the circuit.

After the properties and / or concentration of the treatment liquor contained in the container 22 have been readjusted for a next treatment step, the treatment liquor can again, as explained above and in FIG. 3 represented, the machine and the goods are supplied.

The applied in the transport nozzle 6 on the current strand of goods 4 amount of treatment agent per unit time is controlled by the computer 44 so that, as also already mentioned, sets a substantially uniform distribution of the treatment agent on the fabric strand 4. Depending on the programming of the computer 44 and the data entered by the operator, an optimized distribution of the treatment agent on the running product strand 4 results. The application of the treatment agent can take place via one or more product strand circulations.

In the new method, if necessary, the rotational speed of the strand 4 of goods can be changed by the computer 44 during the application of the treatment agent on the strand of goods 4. But it can also be kept constant.

In the embodiment described above, the treatment agent is injected in the manner described in the transport nozzle 6 ( Fig. 3 ) and thus applied to the fabric strand 4. Alternatively or additionally, however, the new method can also be carried out in such a way that the treatment agent is applied to the product strand 4 before and / or after the transport nozzle 6 in the goods flow path.

The treatment agent application on the product strand 4 controlled by the computer 44 can also be controlled as a function of data which characterizes the treatment agent application on the running product strand 4 and which are obtained during the course of the process. This data is processed by the computer 44 as part of its control program in which he utilizes the underlying the control program computational model. For this purpose are suitable Sensor means provided which monitor the product strand 4 and, if necessary, the treatment agent.

Finally, when applying the treatment agent to the product strand 4, it is also possible to proceed such that the amount of treatment agent applied to the product strand is determined by appropriate removal of treatment agent from the preparation container 22. This can happen, for example, in such a way that in FIG. 3 the valve 29 is driven accordingly or that the amount of the treatment agent contained in the batch tank 22 is sized accordingly.

Claims (17)

1. Method for the uniform application of treating agent to a product strand in a dyeing machine, in which

   • the continuous product strand (4) is set in rotation in a closed container (1) by means of a venturi transport tube (6), which is subjected to a gaseous transport medium, and

   • the product strand is exposed to the action of a liquid treating agent, wherein

   the treating agent is stored in a chamber (22) separate from the product strand without contact with the product strand, from this chamber the treating agent is caused to act on the continuous product strand with a time-controlled amount of treating agent per unit time, and
   thus treating agent is only removed from the separate chamber (22) and is applied to the product strand without mixing with the treating agent discharging from the product strand and treating agent discharging from the product strand is collected in a collection chamber (14) without acting on the product strand (4).
2. Method according to claim 1, characterised in that treating agent located in the container (1) or in a collection chamber (14) connecting to this is brought into the chamber separated from the product strand.
3. Method according to claim 1, characterised in that additive is added to the treating agent in the separate chamber (22).
4. Method according to one of the preceding claims, characterised in that the treating agent is prepared in the separate chamber (22) while another separate treatment process of the product strand (4) is being conducted.
5. Method according to one of the preceding claims, characterised in that the rotational speed of the product strand and the application time of the treating agent to the product strand (4) are coordinated to one another.
6. Method according to one of the preceding claims, characterised in that the amount of treating agent applied to the product strand per unit time is controlled as a function of the rotational speed of the product strand (4).
7. Method according to one of the preceding claims, characterised in that the rotational speed of the product strand is kept constant during application of the treating agent to the product strand (4).
8. Method according to one of claims 1 to 6, characterised in that the rotational speed of the product strand is varied during application of the treating agent to the product strand (4).
9. Method according to one of the preceding claims, characterised in that the volume flow of the treating agent is kept constant during application of the treating agent to the product strand (4).
10. Method according to one of the preceding claims 1 to 8, characterised in that the volume flow of the treating agent is varied during application of the treating agent to the product strand (4).
11. Method according to one of the preceding claims, characterised in that the amount of treating agent applied to the product strand (4) is determined by the corresponding removal of treating agent from the separate chamber (22).
12. Method according to one of claims 1 to 10, characterised in that the amount of treating agent to be applied to the product strand (4) is determined by the corresponding addition of further treating agent to the separate chamber (22).
13. Device for conducting the method according to one of the preceding claims, with a closed container (1), a venturi transport tube system (6) associated with the container (1), which is subjected to a gaseous transport medium, and with a means for applying a liquid treating agent to a rotating product strand (4) set in rotation by the transport tube system (6) in the container (1), wherein the device has a preparation tank (22) forming a chamber separated from the product strand and a means (17) for transporting the treating agent contained in the preparation tank, the preparation tank (22) is separated from the closed container (1) or can be separated from this and is connected to a collection chamber (14) to receive treating agent discharging from the product strand by means of pipe elements (16), which at least have stop valve elements (43) and pumping elements (17) to transport treating agent collected in the collection chamber (14) into the preparation tank (22), wherein control elements (44) are provided to cause the treating agent from the preparation tank (22) to act on the continuous product strand with a time-controlled amount of treating agent per unit time without mixing with treating agent discharging from the product strand.
14. Device according to claim 13, characterised in that the preparation tank (22) is connected to the closed container (1) by means of valve elements (43), by means of which the preparation tank (22) can be separated from the closed tank (1) with respect to liquid flow.
15. Device according to claim 13 or 14, characterised in that the preparation tank (22) has associated pumping elements (17) for the treating agent, which are directly connected by means of pipe elements (18, 21) to means for applying treating agent to the product strand in the closed container (1).
16. Device according to claim 13, characterised in that the collection area is configured in a collection chamber (14) arranged below the closed container (1).
17. Device according to one of claims 14 to 16, characterised in that it has a container (35) for an additive, which is connected to the preparation tank (22) by means of pipe elements (30, 33), which contain selectively actuated valve elements (31, 34, 36, 39).

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