EP0548026A1 - Method for conditioning roving in spinning machines and a spinning machine for carrying out this method - Google Patents

Abstract

In a spinning machine, the fiber strand used in the spinning process or at least some of the roving bobbins (11, 101,) on which the fiber strand is wound, or the roving (10) leading from the roving bobbins (11) to the drafting device (18) is immediately on one side acted upon by an air-conditioned medium through one or more nozzles (12, 122) or outlet openings (12 ') guided in its vicinity. In this way, a targeted air conditioning of the fiber strand fed to a drafting system of the spinning machine is achieved, since the medium can hardly mix with the atmosphere surrounding the fiber strand before it reaches it. <IMAGE>

Description

The invention relates to a method for air conditioning roving in spinning machines and a spinning machine for performing this method.

It is already known that in order to achieve perfect spinning results, the roving bobbins to be machined or manufactured in a ring spinning machine must be surrounded by an air-conditioned atmosphere, which can have a temperature of 28 ° C. and a relative humidity of 50%, for example. Larger values of e.g. 60% humidity is conceivable.

In order to create such an air-conditioned atmosphere in the area of the yarn bobbins, it is customary to air-condition the entire spinning room accordingly (DE-Gbm 89 08 921). However, attempts have also already been made to bring the conditioned air primarily in the vicinity of the roving bobbins to be conditioned in order to reduce the energy expenditure for the air conditioning of the entire spinning room (DE-Gbm 1 969 970).

Furthermore, it has already become known (DE-AS 1 164 286) to encapsulate the spinning positions of a ring spinning machine including the roving bobbins in a housing which is subjected to the air-conditioned atmosphere. However, this is complex and makes operating the spinning machine considerably more difficult. In addition, the entire interior of the housing must also be provided with conditioned air in such a configuration.

It is also known to encapsulate only the roving bobbins together with the associated slip gate in a housing and to keep them in an air-conditioned atmosphere (JP-A-59 116 430).

But even here, the entire interior of the housing must be supplied with conditioned air and the operation of the spinning machine - for example, the replacement of the roving bobbins is more complex than with a device without a housing.

Open-end spinning machines have already (DE-OS 39 19 284) equipped the sliver-containing sliver cans with a central channel through which air brought to a certain temperature and a certain degree of humidity flows. However, since the area above the spinning cans is not air-conditioned, there is a risk that the optimal climatic condition attained when spinning will no longer exist due to the time that passes until the band enters the open-end spinning device.

The aim of the invention is to provide a method according to the preamble of claim 1 and a spinning machine according to the preamble of claim 12, in which an optimal air conditioning of the yarn is achieved in such a way that with a minimal consumption of air conditioning medium that this during with regard to the climatic conditions, particularly critical phases of the spinning process are retained.

To achieve this object, the features of the characterizing parts of claims 1 to 12 are provided.

According to the invention, the climate medium set to the optimum temperature and humidity values is thus brought up to the roving bobbins or roving to be air-conditioned by means of closed lines on all sides, so that the air-conditioning medium comes into contact with the roving to be air-conditioned before it substantially mixes with the ambient air and preferably also penetrates to a certain depth in the roving bobbins. Thus, despite a different temperature and humidified ambient atmosphere, an optimal climatic condition is created in the area of the yarn packages. It is particularly important that, because the bobbins rotate during the operation of the spinning machine, the directly supplied air-conditioning uniformly acts on the entire circumference of the yarn bobbins, which in particular prevents unclimated areas from remaining. Possibly liquid, in particular water in finely divided form, could also be applied to the roving as a spray jet or mist.

After the roving spooled off from a roving bobbin is stretched and spun after a comparatively short time and the spun yarn wound on a bobbin is immediately air-conditioned during winding, it is ensured that the optimal climatic condition is largely maintained or the bobbin is virtually air-conditioned during manufacture is, so that an optimal climatic atmosphere is included in the finished cop, which is retained for a long time even during subsequent transport of the cop for further processing, for example in a winder.

Advantageous developments of the method according to the invention are characterized by claims 2 to 11.

The design according to claims 8 or 9 ensures a controlled airflow from the roving bobbins to the drafting system and the spindles, so that a high air-conditioning efficiency is achieved which, with optimal air conditioning of the roving yarn, allows the amount of air-conditioning air directly supplied to the roving bobbins or roving minimize and thus get by with low energy consumption.

According to claims 10 or 11, the water content of the conditioned air can be adjusted. On the one hand, this results in optimal and constant air conditioning of the roving or the fiber strand, depending on the room ambient temperature, and on the other hand, the number of thread breaks can be reduced with the aid of this water content control.

An advantageous spinning machine to run of the method according to the invention is characterized by claim 12. Advantageous developments of this device are defined by claims 13 to 22. The training according to claim 22 ensures a minimization of the supplied air conditioning with optimal air conditioning of the yarn.

• Fig. 1 einen Schnitt senkrecht zur Längsrichtung einer erfindungsgemäßen Ringspinnmaschine, wobei nur die Vorgarnspulen klimatisiert sind,
• Fig. 2 eine analoge, noch stärker schematisierte Ansicht nur einer Hälfte der Spinnmaschine, wobei zusätzlich noch eine Klimatisierung des Vorgarnes angedeutet ist,
• Fig. 3 eine analoge Teilansicht einer weiteren Ausführungsform einer erfindungsgemäßen Ringspinnmaschine,
• Fig. 4 eine vergrößerte und mehr Details zeigende Schnittansicht nach Linie IV IV in Fig. 3,
• Fig. 5 eine teilweise Schnittansicht einer etwas anderen Ausführungsform, als sie in Fig. 4 gezeigt ist,
• Fig. 6 eine schematische Seitenansicht einer erfindungsgemäßen Spinnmaschine, wie sie anhand der Fig. 3 bis 5 veranschaulicht ist,
• Fig. 7 eine Stirnansicht eines Vorgarnspulengatters mit jeweils vier Vorgarnspulen zugeordneten Klimaluftzufuhrrohren,
• Fig. 8a eine Draufsicht des Gegenstandes der Fig. 7,
• Fig. 8b eine um zusätzliche Klimaluftzufuhrrohre erweiterte Draufsicht des Gegenstandes der Fig. 7,
• Fig. 9 eine stark schematisierte Vorderansicht einer erfindungsgemäßen Ringspinnmaschine,
• Fig. 10 eine schematische Ansicht eines Teils einer erfindungsgemäßen Spinnmaschine mit Sensoren und einem Luftfeuchtigkeits-Regelkreis und
• Fig. 11 eine Spinnmaschine nach Fig. 10 mit einem vereinfachten Regelkreis.

By combining the roving air conditioning according to the invention with the suction at the air guide chamber in the area of the spindles, a substantial saving of conditioned, ie heated and humidified air is achieved, whereby the energy consumption can be drastically reduced.

• 1 shows a section perpendicular to the longitudinal direction of a ring spinning machine according to the invention, only the roving bobbins being air-conditioned,
• 2 shows an analog, even more schematic view of only one half of the spinning machine, with air conditioning of the roving also being indicated,
• 3 shows an analog partial view of a further embodiment of a ring spinning machine according to the invention,
• 4 is an enlarged and more detailed sectional view along line IV IV in FIG. 3,
• 5 is a partial sectional view of a slightly different embodiment than that shown in FIG. 4,
• 6 shows a schematic side view of a spinning machine according to the invention, as illustrated with reference to FIGS. 3 to 5,
• 7 shows an end view of a roving bobbin creel with four air roving air tubes assigned to each roving bobbin,
• 8a is a top view of the object of FIG. 7,
• 8b is a top view of the object of FIG. 7, expanded by additional air-supply air tubes,
• 9 is a highly schematic front view of a ring spinning machine according to the invention,
• Fig. 10 is a schematic view of part of a spinning machine according to the invention with sensors and a humidity control circuit and
• 11 shows a spinning machine according to FIG. 10 with a simplified control loop.

According to FIG. 1, a ring spinning machine according to the invention has spinning stations 13 arranged next to one another on both sides of the vertical central longitudinal plane 17, which are formed by drafting devices 18 and spindles 19 arranged thereunder with the associated components. The spindles 19 are surrounded from above with an air inlet opening 26 ′ having an air guiding chamber 26, which at their lower end is connected by lines 8 branching inwards to a central suction channel 7 extending in the longitudinal direction of the machine, which leads to a filter 33 (not shown).

In the area of each drafting device 18 there are suction devices which are connected to a further central suction channel 5 which extends in the longitudinal direction of the machine and is located vertically above the suction channel 7 and which leads to a filter 32, also not shown.

Above the drafting devices 18 are roving gates 20 on which the roving bobbins 11 required for feeding the drafting devices 18 are suspended. At the same time, two roving bobbins 11 are processed by each drafting device 18, while the third is kept in reserve.

A schematically indicated blower 22 can be moved along the spinning stations 13 arranged next to one another in a row and is used to clean the individual spinning stations by blowing and / or suction air with its trunk 23.

According to the invention, an air-conditioning duct 14 is provided above the creel 20, which extends in the longitudinal direction of the ring spinning machine and has branch pipes 24 on its underside, which lead to nozzle pipes 15 extending in the longitudinal direction of the machine, which roughly level with the upper conical region 11 'of the roving bobbins 11 run and each have one or more air outlet nozzles 12 relative to the circumference of the roving bobbins 11.

Air-conditioned air with a temperature of e.g. 28 ° C and a relative humidity of 50%. This passes through the intermediate tubes 24 to the nozzle tubes 15 and is directed out of the air outlet nozzles 12 directly onto the surface of the roving bobbins 11 rotating during processing. The Klimauftgelangtsomits after emerging from the nozzle tubes 15 immediately in contact with the surface of the yarn package 11, so that an optimal air conditioning of the roving is guaranteed with a minimum of Klimauft.

Below the roving bobbins 11, the air coming from the air outlet nozzles 12 is sucked out partly through the air inlet openings 6 'of the suction line 6 into the suction duct 5 and partly through the air inlet openings 26' into the air guide chambers 26 and from there via the lines 8 into the suction duct 7. The climate air largely follows the path of the roving 10, so that it is kept in the optimally air-conditioned state up to the spindles 19 because the heat conduction of about 50 watts that arises in the spindle area does not rise into the creel, but flows into the spindle chamber and is discharged in the second channel 7.

In order to separate the creel area from the spinning hall, curtains or sliding windows 25 can be provided on both sides of the spinning machine.

In the following figures designate the same Be tensile numbers corresponding components as in Fig. 1st

According to FIG. 2, the air which is branched off from the air-supply duct 14 can also be directed into air-air supply tubes 9 which extend parallel to the roving bobbins 11 and which, over their length, have a number of air-conditioning air outlet openings 12 'which face the surface of the roving bobbin 11. In this way too, the climate air is fed directly to the roving 10 without premixing with the room air.

According to FIG. 2, a further air-conditioning air supply pipe 9 'can also be branched off from the air-conditioning air supply duct 14 and can be guided parallel to the part of the roving 10 extending between the roving bobbins 11 and the drafting device 18, where again a number of air-conditioning air outlet openings 12' opposite the roving 10 passing by is provided.

A suction line 6 is provided underneath each drafting device 18, which extracts a portion of the air conditioning that gets there with the reusable fibers that are released in the drafting device 18 and leads to the central suction channel 5. In contrast to the exemplary embodiment according to FIG. 1, the spindles 19 of the embodiment according to FIG. 2 are provided with individual drive motors 28, along which the air that is sucked into the air guiding chamber 26 is also guided, so that the motors 4 are cooled accordingly.

In addition, a further air-supply duct 2 can be provided on the ceiling 3 of the spinning hall, which air-conditioning outlet openings 12 ″ are arranged laterally at certain intervals.

Each roving bobbin 11 is preferably supplied with, for example, four m ³ / h of air, which is discharged partly through the suction 5, 6 and partly through the suction 7, 8, 26. One gets along with such small quantities of air-conditioning air because the air-conditioning air supplied is directly supplied to the roving material with only minimal mixing with ambient air and is extracted in such a way that it flows along the roving material 10 until it leaves the spinning room. It is therefore particularly important that the suction of the air conditioning takes place on the one hand through the air guide chamber 26 on the spindles 19 and, if appropriate, also partly through the discharge lines 6 and the suction channel 5 in the area of the drafting devices 18.

In order to also air-condition the spinning hall in a suitable manner, an additional 8 m ³ / h of air can be supplied per spindle through the air-supply duct provided on the ceiling 3, half of which is then exhausted by suction 5, 6 or 7, 8, 26 are dissipated.

In the exemplary embodiments according to FIGS. 3 to 6, the air is supplied to flat hollow bodies 16, which are provided at certain intervals along the spinning machine and are connected to the air duct 14, intermediate hollow tubes 16, which are arranged next to a roving bobbin 11 and essentially over their entire height extend. 4 and 5, the hollow bodies 16 are curved such that they enclose the roving bobbins 11 with one of their flat sides over an angular range of approximately 90 °.

On the side facing the bobbins 11, the hollow bodies 16 have air-conditioning outlet openings 12 ′ which are distributed uniformly over their surface and which are determined at a close distance by the stop 31, from the surface of the bobbin 11 or in contact therewith.

3 and 4, each flat hollow body 16 is arranged to be pivotable in the direction of the bobbin or away from it about a pivot axis 29 which is arranged next to the roving bobbin 11 and runs parallel to the bobbin axis. The hollow body is expediently prestressed by a spring 30 (FIG. 4) in the direction of the yarn bobbin 11 against a stop 31, so that perfect air conditioning of the surface of the roving bobbin 11 is ensured.

In the exemplary embodiment according to FIG. 5, the hollow body 16 can be pivoted via a spiral spring 30 'and at the same time is spring-loaded in the direction of the stop 31.

According to FIG. 6, intermediate tubes 24 are branched off from the air-conditioning duct 14 at certain intervals in the longitudinal direction of the spinning machine, each of which acts on the air-conditioning air supply tubes 15 ′ that also run in the longitudinal direction, from which further intermediate tubes 24 ′ branch off to the hollow bodies 16.

In the exemplary embodiment according to FIGS. 7 to 8 a, vertical air-conditioning air supply pipes 9 branch off from the nozzle pipes 15 or the intermediate pipes 15 ′, which extend between a group of four rectangular or square roving bobbins 11 and air outlet openings 12 opposite the surfaces of the roving bobbins 11 ' exhibit. In this way, a total of four roving bobbins can be directly and optimally supplied with air-conditioning air from a single vertical air-conditioning air supply pipe 9.

In the embodiment of FIG. 8b, a further six air-conditioning air supply pipes 9 "were branched off from the nozzle pipes 15 and the intermediate pipes 15 ', with three air-conditioning air supply pipes 9" each lying on a line, through a group of four rectangular or square roving bobbins 11 from each other air supply pipes 9 'are separated. The nozzle openings 12 ′ of the additionally introduced air-conditioning air supply pipes 9 ″ point in the direction of the air-conditioning air supply pipe 9 ″ that is opposite and separated from the group of roving bobbins 11. With this arrangement, a natural climatic chamber with a spatially very constant climate is built up, as a result of which in particular a climate gradient at the roving bobbins 11 is avoided.

9 are ne according to the invention at all spinning stations 13 arranged beneath one another are arranged below the drafting device 18 suction openings 6 ', which guide the fibers that are released on the drafting devices 18 and are largely reusable via the suction lines 6 into a central suction channel 5 which extends in the machine longitudinal direction and which contains the total amount of air extracted by the drawing devices 18 through a filter 32, consisting of a filter housing 32 ', a drum screen 32 "and a replaceable collecting device 32, for example in the form of a drawer, which separates the reusable fibers 36 and collects in the replaceable collecting device 32. In the lower central, likewise In the machine longitudinal direction extending suction channel 7, the fiber fly and dust sucked in via the openings 26 'also arranged at each spinning station 13 and the lines 8 is passed through a filter 33 with a filter housing 33' which this waste products 34 through a drum sieve 33 "into a r also separable interchangeable collecting device 33. After the filters 32 and 33, the suction channels 5 and 7 are brought together into a common end suction channel 35, as a result of which only a single suction fan 37 is required.

Figure 10 shows schematically how the process can be further developed with a control device depending on the conditions in the spinning room. The spinning machine 100 contains a plurality of roving bobbins 101, of which the roving 101 a is fed to the drafting system 106. After the drafting device, the yarn 105 is wound onto a yarn spool 102, which is provided with a drive 107, by means of a ring 103 and a rotor 104 rotating thereon. A thread break monitor 128 can be used, for example, to monitor at the level of the runner 104 whether there is a yarn break. At least one temperature sensor 126 is provided in the spinning machine 100, from which temperature measured values are transmitted to a controller 125 via a signal line 126a. The controller 125 is connected via a control line 126b to a metering device 123, with which water can be supplied to a mixing chamber 124 according to arrow 121b depending on the measured values of the temperature. According to arrow 121a, an air line also opens into the mixing chamber 124. The humidified air 121c is accordingly supplied to the roving bobbins 101 in a controlled manner via pipelines 121. With increasing temperature in the area of the temperature sensor 126, the humidified air will have a higher water content. In addition, a moisture sensor 127 can be used, with which the control behavior of the controller 125 can be improved.

The air conditioning of the roving bobbins 101 and 11 can also be achieved in that instead of humidified air, only water is supplied, that according to FIG. 11, a metering device 123 is used and, analogously to the arrangement in FIG. 10, via a pipeline 121 according to the drawing Arrows in the spinning machine 100 is distributed. At the level of the roving bobbins 101, the water can be sprayed through fine nozzles 122 located at the end of the pipeline 121, a direct spraying of the water mist onto the surface of the roving bobbin being advantageous because the moisture is applied to the roving even more specifically. With this arrangement, too, it is expedient to regulate the amount of water supplied per unit of time by means of a temperature sensor 126. A basic value for the water output per unit of time can be specified in the controller 125, likewise a setpoint value for the air humidity in the vicinity of the roving bobbins, this being monitored in each case by a moisture sensor 127 according to FIGS. 10 and 11.

Claims (22)

1. A method for air conditioning a fiber strand to be fed to a drafting system, in particular a roving in spinning machines, in particular ring spinning machines, in which air-conditioned medium is fed to the fiber strand or roving,
characterized,
that the fiber strand or at least part of the roving bobbins (11, 101) and / or the roving (10) leading from the roving bobbins (11) to the drafting device (18) on one side directly through one or more nozzle (s) guided in their vicinity ( 12, 122) or outlet openings (12 ') are acted upon by the conditioned medium before it can mix with the atmosphere surrounding the nozzle (s) (12, 122) or outlet openings (12'). 2. The method according to claim 1, characterized in that the conditioned medium consists of air into which water is sprayed. 3. The method according to claim 2, characterized in that the air has a humidity of 30 to 80%, preferably 40-70%, in particular 50-60% and a temperature of 10 ° -50 ° C, preferably 20 ° -40 ° C , in particular 25 ° - 35 ° C. 4. The method according to claim 1 to 3, characterized in that the climatic medium is applied from in the upper region of the roving bobbins (11), preferably in the conically tapering upper region (11 ') arranged climatic medium outlet nozzles (12) or climatic medium outlet openings (12') . 5. The method according to claim 1 to 3, characterized in that the climatic medium is applied on at least one side over at least substantially the entire height of the roving bobbin (11). 6. The method according to any one of the preceding claims, characterized in that the climate medium is applied over a significant fraction of the circumference of the roving bobbin (11). 7. The method according to any one of the preceding claims, characterized in that the climatic medium is applied to the yarn in the form of one or more jets directed directly onto the surface of the roving bobbin (11) before substantial mixing with ambient air. 8. The method according to any one of the preceding claims, characterized in that a central air extraction is carried out in the region of the individual spindles (19). 9. The method according to any one of the preceding claims, characterized in that a central air extraction is carried out on each drafting device (18). 10. The method according to any one of claims 2 to 9, characterized in that the water content of the moist air supplied to the roving bobbins can be adjusted, in particular depending on the ambient temperature prevailing in the hall. 11. The method according to claim 10, characterized in that the water content is determined by the number of thread breaks. 12. Spinning machine, in particular ring spinning machine for carrying out the method according to one of the preceding claims with at least one climate medium supply channel (14) extending in the longitudinal direction along the spinning positions (13),
characterized,
that in the immediate vicinity of each roving bobbin (11) and / or the roving (10) extending between roving bobbin (11) and drafting device (18), at least one climatic medium outlet nozzle (12) or climatic medium outlet opening (12 ') which is in flow communication with the climatic medium supply channel (14) is provided. 13. The apparatus according to claim 12, characterized in that a common climate medium outlet nozzle (12) or climate medium outlet opening (12 ') is provided for two adjacent roving bobbins (11). 14. The device according to claim 12 or 13, characterized in that along the upper region (11 ') of the roving bobbins (11) to the climate medium supply channel (14) connected nozzle tubes (15) are laid, each in the vicinity of the coil surfaces of climate medium outlet nozzles (12 ) or climate medium outlet openings (12 '). 15. The device according to claim 12, characterized in that the roving bobbins (11) are at least partially surrounded by a particularly flat climate medium supply hollow body (16) which preferably extends at least approximately over its entire height and has climate medium outlet openings (12 ') towards the coil surface . 16. The apparatus according to claim 15, characterized in that the hollow body is preferably curved in accordance with the central coil curvature. 17. The apparatus according to claim 15 or 16, characterized in that the hollow body (16) is movably mounted in the direction of the roving bobbin (11) and abuts a stop (31) such that it just touches the surface of the full bobbin or a little Distance from it. 18. The apparatus according to claim 17, characterized in that the hollow body (16) is resiliently pressed against the stop (31). 19. The device according to claim 12, characterized in that in addition to each roving bobbin (11) is provided a climate medium supply pipe (9) extending parallel to it, which climatic medium outlet nozzles (12) or climate medium outlet openings (12 ') pointing to the surface of the roving bobbin (11). having. Device according to claim 19, characterized in that a group of roving bobbins (11), in particular four roving bobbins (11), is arranged around a common central climate medium supply pipe (9) which extends essentially parallel to their axis. 21. The apparatus according to claim 20, characterized in that further climate medium supply pipes (9 ") around the group of roving bobbins (11) ago are arranged around. 22. The device according to one of claims 12 to 21, characterized in that each spindle (19) is surrounded by an air guide chamber (26) which has an air intake opening (26 ') at the top and on the side or bottom of a central, all spindles (19 ) assigned suction channel (7) is connected.

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