DE2738471A1 - Textile web treatment bath and dryer drive system - has final and pre-dryers, and tension controller for two webs - Google Patents

Abstract

The textile web treatment plant with a treatment bath from which two webs are conveyed, has a predrier following the bath, then a final drier. Both driers a cylinder driers, and between the bath and the predrier are two tensioning rollers, one above the other, associated with a tension measuring system. The permits individual control of the tension in each of the two webs. This predrier has two pairs of driven drums each with one drum above the other and the upper and lower drums of each pair at the same distance from the bath. Each pair has a drive unit the first unit being connected to the monitor for the tension control unit. These drives and the final drier are mounted on a common drive shaft, from which rollers at the bath are also driven.

Description

Device for treating warps

The invention relates to a device for treating warps with a treatment trough and a downstream dryer, preferably one Cylinder dryer, with a partial device behind the treatment trough for the Warp warps are provided, which preferably divides them into two partial webs.

Such devices are already known in which the warps z. B. after coloring or the like treatment in the treatment trough and after dividing at the dividing device are passed through a cylinder dryer. It is essential that the individual partial webs of the warp evenly dried and fed to the same properties of the warps to ensure.

For this purpose, it is already known that the downstream treatment trough Dryer - e.g. B. for two partial webs - has two identical roller groups that are arranged substantially at the same distance from the treatment trough. Through this is to a certain extent an approximately even treatment of the warps possible. It is also problematic in the treatment of the warp partial webs, to avoid different elongations, tensions and the like. In particular should the individual partial tracks be guided under even tension, what but also because of the respective driven rollers in the treatment trough and in often causes problems for the dryer.

This also results in the object of the present invention, the consists in particular in creating a device of the type mentioned at the beginning, which in particular avoids different tensile forces in the individual partial webs and also the overall pull of the warps, especially between the individual ones Processing stations can be kept at a predeterminable level.

To solve this problem, it is proposed according to the invention in particular that that at least in the course of the warps between the treatment trough and the dryer a measuring device is provided to record the tensile stresses of the partial webs, which is part of a regulation for the tensile stresses of the individual partial webs. A tension control of the individual partial webs in the area between the treatment trough and the dryer is special because of the damp and therefore particularly sensitive The condition of the warps located there is important.

According to the present invention, the tensile stresses of the partial webs detected by a measuring device and the controlled variable in a known manner Control amplifier supplied, the output of which with an actuator z. B. to influence of the drive is connected.

A preferred embodiment of the invention provides that the dryer has at least one pre-dryer which has at least two driven groups of rollers that are somewhat spaced one above the other and essentially the same Distance to the treatment trough are arranged, with one of the drive connections the separate roller groups of the pre-dryer have a control gear, that with the measuring device between the treatment trough and the pre-dryer in regular communication stands. This allows the tension of a partial web by adjusting the corresponding Adjusted the drive of the associated roller group to the tension of the other partial web so that the warp partial webs are then subjected to the same tensile stresses. The prerequisite already created by the advantageous construction of the pre-dryer for an even treatment of the partial webs by the drive control device advantageously supplemented, so that a practical by this combination according to the invention the same tensile stress can be achieved within the individual warp partial webs. This also advantageously leads to a qualitatively better end product.

A further development of the invention provides that the pre-dryer a After-dryer is connected downstream, whereby these have a common drive, possibly also with the squeezing rollers provided for the treatment trough or the like is in drive connection, with between the pre-dryer and the post-dryer, optionally also between the pre-dryer and the squeezing rollers or the like Treatment trough In each case a control gear is provided, which is preferably in each case a control connection to corresponding control organs in the sense of a warp tension control exhibit. This also allows the overall pull of the warps between the individual Processing stations kept practically constant and at a predeterminable value will.

A measuring device is expediently in the sub-device arranged, wherein the sub-device has at least two deflection rollers which are movably mounted transversely to their Acharrichtung and the corresponding movements transferred to the measuring device. If there are different tensile stresses, a Deflection of the guide rollers, which are transferred to the measuring device, there in a controlled variable suitable for further processing is implemented, which is then used for adjustment the tensile stress in the sense of an adaptation and equalization of the individual tensile stresses serves the partial courses.

The measuring device preferably has a potentiometer, if necessary an inductive, or a capacitive or an optoelectronic transducer on. A potentiometer has the advantage that it takes very little effort can be used. In contrast, they have inductive, capacitive, optoelectronic transducers in particular the advantage that they work practically without wear and accordingly practically are maintenance-free.

Additional refinements of the invention are set out in the further subclaims listed. The invention and its details are given below the drawing explained in more detail.

It shows in a schematic representation: FIG. 1 a side view of a Device according to the invention with drive, FIG. 2 a partially broken open or Broad side view shown in section and FIG. 3 shows an end view of a Partial device with two deflection rollers, FIG. 4 shows an end view and FIG. 5 a side view of a modified embodiment of a partial device, 6 and 7 again a modified embodiment of a sub-device in broad side and in an end view and FIG. 8 shows an inventive Device with modified warp guidance.

A device 1 according to the invention (Fig. 1) is used to treat Weaving chains 2, which consist of a z. B. with sizing liquor or the like.

filled treatment trough 3 are fed to a dryer 4.

The Vebketten 2 run in a large number side by side overall as a web of material over corresponding rollers.

In the exemplary embodiment, the dryer 4 has a pre-dryer 4 a and an after-dryer 4 b. The warps 2 are used for dyeing, for example together through the treatment trough 3 and then through a squeezing mechanism 5 with squeeze rolls 5 a, 5 b out. This is followed by a Partial device 6, in which the warp group is divided into two partial webs 2 a, 2 b will. These partial webs 2 a, 2 b then become two separate groups supplied by pre-dryer rollers 7 a, 7 b. In the exemplary embodiment, the before and the subsequent after-dryer designed as a cylinder dryer. Besides this In an advantageous embodiment, however, air dryers and the like can also be used.

After the pre-dryer 4 a, the partial webs 2 a, 2 b of the warps 2 are brought together again to form a common web, which is then used for the after-dryer 4 b passes through.

The pre-dryer 4 a has two driven groups of rollers 7 a, 7 b, which are mirror-symmetrically one above the other and essentially with some distance are arranged at the same distance from the treatment trough 3. The warps 2 are thereby dried in both partial webs 2 a, 2 b in the same length, so that in particular uniform pre-drying takes place. This is also due to the meandering shape Wrapping of the pre-dryer rollers 7 a, 7 b favors what in particular a pre-drying the warp 2 results from two sides. Different degrees of drying of the individual partial webs 2 a, 2 b and also the warps in themselves are thereby avoided.

For the entire device 1 with the treatment trough 3, the pre-dryer 4 a and the after-dryer 4 b, a common drive A is provided, which is shown in Fig. 1 is shown very schematically. You can also see several control gears 8, 9, 10, which are switched on in the course of the drive A.

A control gear 8 is between the squeezer 5 and the Pre-dryer 4 a, a further control gear 9 between the pre-dryer and the post-dryer 4 b and finally a variable speed transmission 10 in a drive branch for a group of pre-dryer rollers z. B. 7 a provided £ Fig. 1).

The latter variable speed transmission 10 is of particular importance there Deviations in the drive of the two pre-dryer Val zen groups are different Elongation, tension within the continuous material web and thus uneven End product can result. The control gear 8, 9, 10 expediently each have a control connection to corresponding control organs, whereby a total warp tension control is created.

Between the treatment trough 3 and the pre-dryer 4 a is a measuring device 11 provided, which is in control connection with the control gear .10. This measuring device 11 is arranged at the partial device 6. The partial device 6 has two here Deflection rollers 13, 14, over which the individual partial webs 2 a, 2 b of the warps 2 are performed. By means of the deflection rollers 13, 14, which are transverse to their axial direction are movably mounted, the tensile stress of the partial webs 2 a, 2 b is detected and transmit the corresponding movement to the measuring device 11. This measuring device 11 belongs to a regulation for the tensile stresses of the individual partial webs 2 a, 2 B. The regulation is designed as a post-volume regulation. The one on the measuring device 11 transferred respective position of the guide rollers 13, 14 is converted into a converted measured value suitable for further processing and a control amplifier 12 fed. Another input of the control amplifier 12 is with a setpoint potentiometer 18 connected. The output 15 of the control amplifier 12 controls a motor 16, the is mechanically connected to the control gear 9 and its gear ratio can be changed.

With a predetermined neutral position of the deflecting rollers 13, 14 - d. H. with the same train of the partial webs - in which the control gear 10 is preferably is in a central position, the motor 16 of the variable speed transmission is not controlled and stands. When deflecting the deflection rollers 13, 14 comes from the measuring device 11 a corresponding measured value to the control amplifier 12, whose Output 15 now controls motor 16.

This adjusts the control gear 10 until the measuring device has reached the neutral position again. As a result, the number is then also the Pre-drying rollers 7 a corrected accordingly until the tensile stresses of the partial webs again show the same values. In the aforementioned scheme can be advantageous PID controller can be used because of its favorable control properties. However, are controllers with other transmission properties can also be used. Since the engine 16 three Switching states, namely clockwise-off-forward, the controller can in a simple embodiment be designed as a three-point controller. Depending on the control deviation the motor 16 is running clockwise or counterclockwise, in each case in the sense of compensation the control deviation switched. If the control deviation is zero, the motor is 16 switched off.

In the exemplary embodiment, the measuring device 11 has a potentiometer 17, the slider position of which reflects the deflection position of the deflecting rollers 13, 14. If necessary, the measuring device 11 can also be equipped with an inductive or a capacitive one or an optoelectronic transducer, in particular work practically wear-free.

A possible embodiment of a partial device 6 with a Fig. 2 and 3 show the measuring device 11. wherein the deflection rollers 13, 14 have common bearing flanges 19. These are stored centrally between the bearing points of the guide rollers 13, 14 in each case. At the Bearing shaft 20 of one of these bearing flanges 19 is a potentiometer 17 mechanically coupled. Fig. 3 shows the course of the partial webs 2 a, 2 b, which according to the arrows Pf 1 run over the guide rollers 13, 14. For example, if the pulling force increases within the partial web 2 a, the rollers 13, 14 are deflected around the bearing shaft 20 according to the arrows Pf 2. On the other hand, there is a deflection according to the arrows Pf 3, if either the tension of partial web 2 b increases or but when the tensile stress of the partial web 2 a decreases.

These deflection movements are transmitted directly to the potentiometer 17 and forwarded to the control amplifier 12. The bearings 21 of the shafts 20 are firmly connected to the machine housing.

A modified embodiment of a partial device 6 b with a Measuring device 11 is shown in FIGS. 4 and 5. The guide rollers 13, 14 are axially symmetrical - Parallel in the exemplary embodiment - planes against one of the application of force mounted displaceably by the warp 2 approximately opposite reverse force.

For this purpose, guide rods serve as longitudinal guides for each deflection roller 22 with guide bearings 22 a, between which the deflection rollers are mounted. on the guide rods 22 are fitted with compression springs 23 for the application of force Opposite application of force to the guide bearings 22 by the warps 2 a and thus the guide rollers 13, 14 ensure.

The relative displacement movement of the deflection rollers 13, 14 to one another is connected to a potentiometer 17 by means of a transmission device 24. For this purpose, the potentiometer 17 is connected to the one guide bearing 22 a and has a gear 25 coupled to its axis. The other guide bearing 22 a has a rack 26 which meshes with the gear 25. Are shifting now the guide rollers 13, 14 with their guide bearings 22 a relative to each other as a result a tension change in a partial web 2 a or 2 b, the potentiometer 17 adjusted The previously described adjustment of the different Tensile stress.

Finally, in Figs. 6 and 7, there is yet another example Partial device 6 c shown with a measuring device 11 a. The guide rollers 13, 14 are mounted here on pendulum levers 27, which roughly counteract the application of force are acted upon by force through the warps 2 by means of springs 28 (FIG. 7).

The pendulum levers 27 have a pendulum bearing 29 that goes beyond the storage for the guide rollers 13, 14 opposite extension 30 on which each carry an adjustable counterweight 31. These weights 31 are used to compensate for the weight of the deflection rollers 13, 14.

The pendulum levers 27, in particular their bearing shafts, are here in each case connected to a potentiometer 17, 17 a. This gives the possibility not to only the difference in the tensile forces of the partial webs 2 a, 2 b, but also their total pull to record and regulate. Accordingly, if the Total train, d. H. with an equal change in the tensile forces of both partial webs 2 a, 2 b also adjust both potentiometers 17, 17 a. With different partial track tensions on the other hand, there is a differential setting of the two potentiometers 17, 17 a relative to each other, and then from the nature of the difference in tensile stresses a corresponding regulation of the tensile forces of the partial webs can be derived.

A combined individual train total train control can be used if necessary also realize in the embodiments according to FIGS. 4 to 7, for. B. by the Deflection rollers 13, 14 with their bearings overall together in the direction of the they acting force component of the warp tension are mounted displaceably and in that the adjustment movement is transmitted to an additional measuring device. This additional measuring device can then with the control gear 8 between the Squeezing 5 of the treatment trough 3 and the pre-dryer 4 a in control connection stand.

The control gear 10 between the pre-dryer 4 a and the post-dryer 4 b can adjust the tension of all warps between the pre-dryer and the post-dryer receiving measuring device in connection. In Fig. 1 is a pendulum roller 35 provided.

The above-described exemplary embodiments of partial devices 6, 6 a, 6 b have a mechanical display instrument 32, with from which the display of a deflection of the guide rollers 13, 14 is possible. Larger deflections can occur in particular in the event of malfunctions within the control system.

According to FIGS. 2 and 3, a scale 33 is attached to one bearing flange 19 and a pointer 34 is provided on the fixed bearing 21 for the bearing shafts 20.

In the embodiment according to FIGS. 4 and 5 are on the guide bearings 22a pointer 34a attached, which the displacement of the guide bearing 22a on fixed Show scales 33a.

Finally, according to FIGS. 6 and 7, the ends on the deflection roller side the pendulum lever 27 itself is designed as a pointer 34b, in the area of which a stationary Scale 33b is arranged.

Fig. 8 shows yet another device 1a according to the invention with another Warp guidance in the area of the pre-dryer 4a.

The partial device 6 is at the end of the pre-dryer on the after-dryer side 4a provided so that the divided warp group with its partial webs 2a, 2b directly the respective pre-dryer rollers 7a, 7b are fed.

In contrast, in the device 1 shown in FIG. 1, the dividing device is 6 arranged comparatively close to the treatment trough 3. The partial courses are running then first over guide rollers 36 and then onto those closer to the after-dryer 4b Pre-dryer rollers 7a and 7b, respectively. This arrangement can also be used, for example, in confined spaces be advantageous between the pre-dryer and the post-dryer.

In Figs. 1 and 8 shown devices 1, la is also still to recognize that the respectively to the upper and to the lower group of the rollers belonging to the pre-dryer rollers 7a and 7b are offset in their storage height, to allow the partial webs 2a, 2b to be guided past the adjacent, to reach the pre-dryer roller belonging to the same group. Here are the leadership roles 36 with their running jacket acted upon by the warps 2 essentially in the same way ltheight as the outwards - i.e. upwards or

below - protruding pre-dryer rollers 7a, 7b arranged.

The entire chain tension control is in the device according to the figures 4 to 7 possible.

The embodiment according to FIG. 8 has the advantage that with it the partial web lengths are short until they appear on the cylinder drums. On the other hand, the other shows In particular, the device shown in FIG. 1 is a particularly preferred embodiment the invention. With her, the function of the pendulum roller 35 is completely unaffected.

All in the description, the following claims and the drawing Features shown can be used individually or in any combination be essential to the invention with one another.

- patent claims - L e r s e i t e

Claims (18)

Claims 1. Device for treating warps with a Treatment trough and a downstream dryer, preferably a cylinder dryer, a sub-device for the warps is provided behind the treatment trough which divides this into preferably two partial webs, d a -d u r c h g e k It is noted that at least in the course of the warps between the treatment trough (3) and the dryer (4) one which absorbs the tensile stresses of the partial webs (2a, 2b) Measuring devices (11) are provided which regulate the tensile stresses of the individual partial tracks (2a, 2b). 2. Apparatus according to claim 1, characterized in that the dryer (4) has at least one pre-dryer (4a) which is driven at least two Has groups of rollers (7a, 7b), which with some spacing one above the other and essentially are arranged at the same distance from the treatment trough (3), and that one of the drive connections the separate roller groups of the pre-dryer (4a) a control gear (10), which with the measuring device (11) between the treatment trough (3) and the pre-dryer (4a) is in regular communication. 3. Apparatus according to claim 1 or 2, characterized in that the pre-dryer (4a) is followed by an after-dryer (4b), which (4a, 4b) have a common drive (A), which may also be used with the Treatment trough (3) provided squeezing rollers (5 a, 5 b) or the like is in drive connection * where between the pre-dryer (4 a) and the post-dryer (4 b) if necessary also between the pre-dryer (4 a) and the squeezing rollers (5 a, 5 b) or the like Treatment trough (3) each a control gear (9, 8) is provided, which is preferably each a control connection to the corresponding control organs in the sense of a warp tension control exhibit. 4. Device according to one or more of claims 1 to 3, characterized characterized in that a measuring device (11, 11 a) in the dividing device (6, 6 a, 6 b) is arranged, wherein the sub-device has at least two deflection rollers (13, 14), which are movably mounted transversely to their axial direction and the corresponding Transfer movements to the measuring device (11-, 11 a). 5. Device according to one or more of claims 1 to 4, characterized characterized in that the measuring device (11, 11 a) is a potentiometer (17), if necessary an inductive or a capacitive or an optoelectronic transducer having. 6. Device according to one or more of claims 1 to 5, characterized characterized in that a pair of deflecting rollers (13, 14) is arranged in a pendulum manner, with these deflection rollers (13, 14) preferably common bearing flanges (19) or the like. Have holding elements that are centrally located between the bearing points of the deflection rollers (13, 14) are each mounted and that at least one of these bearing flanges (19) in particular its bearing shaft (20) is connected to the measuring device (11). 7. Device according to one or more of claims 1 to 6, characterized characterized in that to display the deflection of the deflection rollers (13, 14) at least a mechanical indicating instrument (32) is used. 8. Apparatus according to claim 7, characterized in that the mechanical Indicating instrument (32) on one of the bearing flanges (19) tod. Like. Holding elements of Deflection rollers (13, 14) on the one hand and on the other hand on the stationary relative to this Machine housing has a scale (33) and a pointer (34) or the like. 9. Device according to one or more of claims 1 to 8, characterized characterized in that the deflection rollers (13, 14) in axially symmetrical, preferably in parallel planes against one of the force applied by the warps (2) approximately opposite restoring force are displaceably mounted and that their to each other relative displacement movement by means of a transmission device (24) with the measuring device is connected (Fig. 4, 5). 10. Apparatus according to claim 9, characterized in that on the one deflection roller (e.g. 14) a potentiometer (17) and on the other deflection roller (13) a drive for the potentiometer (17), preferably in the form of a rack (26) or the like. Is provided. 11. The device according to one or more of claims 1 to 8, characterized characterized in that the deflection rollers (13, 14) are mounted on pendulum levers (27), which approximately counter to the application of force by the warps (2) preferably by means of Springs (28) are acted upon by force, and that the pendulum levers (27) each with a Measuring device, preferably in each case a potentiometer (17, 17 a) are connected. 12. The apparatus according to claim 11, characterized in that the Pendulum levers (27) have an extension beyond their pendulum bearing (29) and at its end opposite the bearing for the deflecting rollers (13, 14) carry a preferably adjustable counterweight (31). 13. Apparatus according to claim 11 and 12, characterized in that preferably the mutually facing ends of the pendulum levers (27) as pointers (34 b) are formed, and that in the area of this pointer (34 b) each has a fixed Scale (33 b) is arranged. 14. Device according to one or more of claims 1 to 10, characterized characterized in that the interconnected common storage of the guide rollers movable in the direction of the force component of the warp tension acting on it is stored and cooperates with an additional measuring device. 15. The device according to claim 14, characterized in that the additional measuring device with the control gear (8) between the squeezing rollers (5 a, 5 b) of the treatment trough (3) and the pre-dryer (4 a) in control connection stands. 16. The device according to one or more of claims 1 to 15, characterized characterized in that the control gear (g) between the pre-dryer (4 a) and the Post dryer (4 b) with a tension of all warps (2) between the front and the after-dryer (4 a, 4 b) receiving measuring device is in control connection. 17. The device according to one or more of claims 1 to 16, characterized characterized in that for regulating the tension of the warps (2) or the partial webs (2a, 2b) a PID controller is used. 18. Device according to one or more of claims 1 to 17, characterized characterized in that, in a manner known per se, each to one of the one above the other arranged groups of pre-dryer rollers (7a, 7b) belonging to rollers offset in height are, where the belonging to different groups, neighboring, a larger distance from one another having pre-dryer rollers (7a, 7b) guide rollers arranged essentially at the same height with respect to their barrel surface (36) work together.