EP0358136B1 - Process and apparatus for the treatment of textile webs - Google Patents

Process and apparatus for the treatment of textile webs Download PDF

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Publication number
EP0358136B1
EP0358136B1 EP89116233A EP89116233A EP0358136B1 EP 0358136 B1 EP0358136 B1 EP 0358136B1 EP 89116233 A EP89116233 A EP 89116233A EP 89116233 A EP89116233 A EP 89116233A EP 0358136 B1 EP0358136 B1 EP 0358136B1
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EP
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Prior art keywords
conveyor belts
nozzles
blowing
air
cloth
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EP89116233A
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German (de)
French (fr)
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EP0358136A3 (en
EP0358136A2 (en
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Berthold Dipl.-Ing. Magin (Fh)
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AUSTRIA HAUSTECHNIK GESELLSCHAFT M.B.H.
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Austria Haustechnik GmbH
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Priority to AT89116233T priority Critical patent/ATE87359T1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/103—Supporting materials without tension, e.g. on or between foraminous belts with mechanical supporting means, e.g. belts, rollers, and fluid impingement arrangement having a displacing effect on the materials

Definitions

  • the invention relates to methods and devices for treating, in particular drying, shrinking and finishing, textile webs according to the preamble of claims 1 and 5, respectively.
  • Such a method and a device suitable for carrying it out are known from DE-A-23 01 938.
  • the web of material lying on an air-permeable screen belt is successively passed through three drying zones.
  • blowing nozzles are arranged above the web and suction nozzles below the sieve belt.
  • the blowing and suction air jets press the web onto the sieve belt, where it is fixed practically immobile.
  • blowing nozzles are arranged both above and below the sieve belt, which lift the web off the sieve belt.
  • the movement and shrinking processes associated with the drying process can only take place in this zone. However, these movements and shrinking processes are minimal, since practically no dynamic forces are exerted on the web. This type of dryer has therefore not become established in practice.
  • the drying performance is low. Since the air always takes the path of least resistance, it essentially only sweeps over the surface of the goods and only absorbs surface moisture there. The moisture in the depth of the fabric is only removed when it reaches the surface through diffusion and capillary action. Whether and how much of the inflated air flows through the web depends on the distance between the blowing nozzle and the web and on the current air permeability of the web, which in turn is an inverse function of the residual moisture.
  • a dryer is also already known from BE-A-75 23 12, the conveyor belts of which are set in vibration with rotating vibrators in order to enable the shrinking of the textile material webs.
  • the machine with the best drying performance is currently the sieve drum.
  • the material web is forced to flow through from the outside in.
  • the web is firmly fixed on the drum and can only lift off again when the air flow stops and the transition to the next drum or to the machine outlet is released. Since the web is not allowed the slightest freedom of movement, it leaves the screening drum in the same Dimensions with which it was run in.
  • the shrinkage potential inherent in the web is therefore not reduced. Rather, a separate shrinking process has to be carried out afterwards, since goods that fall by 15 to 20% during the first wash are no longer salable today.
  • DE-PS 964 948 a device for tension-free drying of textile material webs is known.
  • the web is guided on an upper conveyor belt in the manner of a hanging loop dryer.
  • the web loops themselves lie on a lower carrying belt.
  • the distance between the upper and the lower carrying strap can be changed.
  • the material web is blown from above with air of low pressure, from below with air of high pressure.
  • the object of the present invention is to improve the method known from DE-A-2 301 938 and the device suitable for carrying it out in such a way that excellent drying performance is achieved with excellent shrinking performance.
  • the aeration known from the drum dryer is connected with the free and tension-free movement of the web as well as with the mechanical processing of the web.
  • suction nozzles opposite the blowing nozzles, the material web is drawn directly in front of the suction slot of the suction nozzles; Therefore, the air has no choice but to flow through the goods and also carry away the moisture sitting in the depth. This effect is optimal if each blowing nozzle is opposite a suction nozzle, the blowing or suction direction being directed essentially perpendicular to the plane of the conveyor belts.
  • the web takes on the well-known sinus shape under the action of the blowing and suction nozzles. If the shaft tips hit conveyor belts, some of the relaxation forces are brought into the web. At the same time, the web is fixed so far that it is transported perfectly straight and does not run away to the side. Since the shaft tips are constantly shifting, the material web is freely movable in both the longitudinal and the width direction, so that the material can shrink.
  • the rest of the relaxation forces are preferably transmitted to the shaft tips lying there by vibrations of at least one of the conveyor belts. Since the web does not rest on the conveyor belt as a whole, but only with the shaft tips, its resonance frequency is hardly influenced by the weight of the goods; The values of band and nozzle spacing or vibration frequency that have been set do not need to be adjusted.
  • Another advantage of the invention is that it is not only possible to dry and shrink with optimum performance, but also that the goods can be optimally equipped. With plush, the handles are raised perfectly, with terry goods a volume is reached, as otherwise only the tumbler brings, crease effects can be created, etc.
  • the air quantity of the blowing nozzles is set higher than the air quantity that is sucked through the fabric web by the opposite suction nozzle.
  • blowing and suction air can advantageously also be set according to the moisture saturation of the drying air.
  • the saturated exhaust air is removed from the system and replaced by an appropriate amount of fresh air.
  • the speed of the conveyor belts does not have to remain constant. Rather, it is preferably changed as dictated by the progressive shrinking process.
  • the principle of aeration according to the invention by means of suction nozzles brings about an enormous increase in the drying capacity, which makes it possible to drastically reduce the dimensions of the system with the same drying capacity compared to the dimensions of known systems.
  • the cross section of the blowing and suction nozzles is conical in order to achieve a constant air speed and a constant exit angle over the length of the nozzle gap, which can reach up to 2.5 m.
  • the height remains of the nozzles constant, so that a low overall height is achieved.
  • Modules which can be combined with one another are advantageously formed from a number of suction and blowing nozzles and vibrators, so that the finished systems can be adapted in a simple manner to the performance required by the customer.
  • Fig. 1 shows a schematic, perspective view of a device for drying, shrinking and finishing textile webs. It essentially consists of three basic elements, the goods inlet, the dryer and the goods take-off.
  • the material web 20 delivered in a mobile transport container 10 is transported via a material web guide 30 with a conveyor belt 31 into the inlet chamber 41 of the dryer 40.
  • the dryer 40 consists of six three-tier modules 40.1 ... 40.6. A total of four endless conveyor belts 43.1 ... 43.4 run through the modules 40.1 ... 40.6.
  • the web 20 runs with a corresponding advance between the lower run of the upper conveyor belt 43.1 and the upper run of the adjacent lower conveyor belt 43.2. Above the lower run and below the upper run, two blowing nozzles 47 and two suction nozzles 48 are alternately arranged in each module, so that one suction nozzle 48 is opposite each blowing nozzle 47. Under the action of the blowing and suction nozzles 47, 48, the web 20 is given the well-known sine wave shape, the wave tips each striking the conveyor belts 43.1 ... 43.4.
  • transfer belts 44 or transfer chutes 45 are arranged there.
  • the belt gap and the nozzle distance, the transport speed and the Vibration frequency can be set continuously.
  • the high drying capacity is made possible by the fact that the drying air has to flow through the web due to the arrangement of each suction nozzle in relation to a blowing nozzle and thereby also tears out moisture that is stuck in the deeper layers of the web.
  • the fabric 20 leaves the outlet of the dryer 40 via a fabric take-off 50 with an outlet conveyor belt 51, it also being possible, if appropriate, to provide a cooling fan and a paneling device.
  • FIG. 2 shows, on an enlarged scale, a section of the device of FIG. 1 in the area of the blowing and suction nozzles 47, 48.
  • the two parallel conveyor belts 43.1, 43.2 on which the web 20 is transported lying loosely can be seen.
  • the mouthpieces 47.1, 48.1 of the blowing nozzles 47 and suction nozzles 48 directly adjoin the rear of the conveyor belts 43.1, 43.2 and are specially shaped to allow the conveyor belts 43.1, 43.2 to pass smoothly.
  • the web 20 is carried without tension by the air currents.
  • the wave valleys and wave peaks shift according to the transport speed of the conveyor belts 43 so that all parts of the web 20 are dried and shrunk intensively.
  • the distance D between the conveyor belts 43.1, 43.2 and correspondingly the distance between the mouthpieces 47.1, 48.1 of the blowing and suction nozzles 47, 48 can be changed in order to enable an optimal adaptation to the properties of the web 20.
  • FIG. 3 and 4 show an enlarged representation of two embodiments of vibrators 49, with the aid of which the conveyor belts 43 can be set in vibration.
  • These are oscillating cylinders 490 - hydraulic or pneumatic - which are mounted on the housing of the dryer 40.
  • the cylinders 490 move oscillating lifting rods 491, to which two-armed levers 493 are articulated by means of rotary joints 492.
  • the two-armed lever 493 are with the help of Bearings 494 mounted on the housing of the dryer 40.
  • the free ends of the two-armed levers 493 carry an impact strip 495, each of which sets the lower conveyor belt 43.3, 43.4 or the upper conveyor belt 43.1, 43.2 in vibration.
  • the lower and upper conveyor belts 43.1, 43.2, 43.3 can also be vibrated together if the resonance frequencies match.
  • blow rollers 496 can be rotatably mounted on the blow bars 495.
  • rotating camshafts can also be used, as shown in FIG. 1 in the area of the lowest conveyor belt 43.4.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

Textiles fabrics are guided with a sufficient lead between two essentially parallel revolving conveyor belts, and blowing nozzles and suction nozzles are alternately arranged above and below the conveyor belts so that one blowing nozzle lies respectively opposite each suction nozzle so as to enable air to be sucked through the fabric and impact a sinusoidal shaped curve to the fabric between the conveyor belts, the conveyor belts vibrating at least in sections and the vibrations being transmitted to the crests of the textile fabric, mutual spacing of the conveyor belts and the associated blowing and suction nozzles, the vibration frequency, and the speed of the conveyor belts being adjustable to the properties of the fabric being treated, such as weight, moisture content and air permeability.

Description

Die Erfindung betrifft Verfahren und Vorrichtung zum Behandeln, insbesondere Trocknen, Schrumpfen und Finishen, von textilen Warenbahnen gemäß dem Oberbegriff der Ansprüche 1 bzw. 5.The invention relates to methods and devices for treating, in particular drying, shrinking and finishing, textile webs according to the preamble of claims 1 and 5, respectively.

Ein derartiges Verfahren und eine zu seiner Durchführung geeignete Vorrichtung sind bekannt aus der DE-A-23 01 938. Hier wird die auf einem luftdurchlässigen Siebband liegende Warenbahn nacheinander durch drei Trocknungszonen geführt. In der ersten und dritten Trocknungszone sind oberhalb der Warenbahn Blasdüsen und unterhalb des Siebbandes Saugdüsen angeordnet. Die Blas- und Saugluftstrahlen pressen die Warenbahn auf das Siebband, wo sie praktisch bewegungsunfähig fixiert wird. In der zweiten Trocknungszone sind sowohl oberhalb als auch unterhalb des Siebbandes Blasdüsen angeorndet, die die Warenbahn vom Siebband abheben. Nur in dieser Zone können die mit dem Trockenvorgang einhergehenden Bewegungs- und Schrumpfvorgänge ablaufen. Diese Bewegungs- und Schrumpfvorgänge sind jedoch minimal, da auf die Warenbahn so gut wie keine dynamischen Kräfte ausgeübt werden. Dieser Trocknertyp hat sich daher in der Praxis nicht durchgesetzt.Such a method and a device suitable for carrying it out are known from DE-A-23 01 938. Here the web of material lying on an air-permeable screen belt is successively passed through three drying zones. In the first and third drying zones, blowing nozzles are arranged above the web and suction nozzles below the sieve belt. The blowing and suction air jets press the web onto the sieve belt, where it is fixed practically immobile. In the second drying zone, blowing nozzles are arranged both above and below the sieve belt, which lift the web off the sieve belt. The movement and shrinking processes associated with the drying process can only take place in this zone. However, these movements and shrinking processes are minimal, since practically no dynamic forces are exerted on the web. This type of dryer has therefore not become established in practice.

Weitere Verfahren und Vorrichtungen sind beschrieben in der DE-A- 23 19 464 oder der DE-A-30 23 225. Hier wird die Warenbahn zwischen zwei Transportbändern geführt und mit erwärmter Luft großer Geschwindigkeit abwechselnd von oben und unten angeblasen. Die an der Warenbahnoberfläche entlangstreichende Luft führt die Feuchtigkeit der Warenbahn ab. Durch die mechanische Bewegung und das Anschlagen der Warenbahn an die Transportbänder werden die Spannungen in den Fasern und im Gewebe, Gewirk bzw. Gestrick gelockert, so daß die Warenbahn während des Trocknens auch schrumpft.Further methods and devices are described in DE-A-23 19 464 or DE-A-30 23 225. Here the web is guided between two conveyor belts and blown at high speed alternately from above and below. The air running along the surface of the web removes the moisture from the web. The mechanical movement and the striking of the web against the conveyor belts loosen the tensions in the fibers and in the fabric, knitted fabric or knitted fabric, so that the web also shrinks during drying.

Während die Schrumpfleistung dieser Verfahren, die in der einschlägigen Technik sehr weit verbreitet sind, schon recht gut ist, ist die Trockenleistung gering. Da die Luft immer den Weg des geringsten Widerstandes geht, streicht sie im wesentlichen nur über die Oberfläche der Ware und nimmt dort nur Oberflächenfeuchtigkeit auf. Die in der Tiefe der Warenbahn steckende Feuchtigkeit wird erst abgeführt, wenn sie durch Diffusion und Kapillarwirkung die Oberfläche erreicht. Ob und wieviel der aufgeblasenen Luft die Warenbahn durchströmt, ist abhängig vom Abstand zwischen Blasdüse und Warenbahn und von der augenblicklichen Luftdurchlässigkeit der Warenbahn, und diese ist wiederum eine inverse Funktion der Restfeuchte.While the shrinking performance of these processes, which are very widespread in the relevant technology, is quite good, the drying performance is low. Since the air always takes the path of least resistance, it essentially only sweeps over the surface of the goods and only absorbs surface moisture there. The moisture in the depth of the fabric is only removed when it reaches the surface through diffusion and capillary action. Whether and how much of the inflated air flows through the web depends on the distance between the blowing nozzle and the web and on the current air permeability of the web, which in turn is an inverse function of the residual moisture.

Ein weiterer Trockner für textile Warenbahnen ist bekannt aus der US-A-42 19 942. Die flach auf einem Transportband liegende Warenbahn wird von oben mit Luft aus schrägen Düsen angeblasen. Rotierende Vibratoren versetzen das Transportband in Schwingungen, um das Schrumpfen der Ware zu ermöglichen. Die Trockenleistung dieses Trockners ist gering, ebenso die Schrumpfleistung.Another dryer for textile webs is known from US-A-42 19 942. The web lying flat on a conveyor belt is blown from above with air from oblique nozzles. Rotating vibrators vibrate the conveyor belt to enable the goods to shrink. The drying performance of this dryer is low, as is the shrinking performance.

Auch aus der BE-A-75 23 12 ist bereits ein Trockner bekannt, dessen Transportbänder mit rotierenden Vibratoren in Schwingungen versetzt werden, um das Schrumpfen der textilen Warenbahnen zu ermöglichen.A dryer is also already known from BE-A-75 23 12, the conveyor belts of which are set in vibration with rotating vibrators in order to enable the shrinking of the textile material webs.

Aus der EP-A-0 137 066 ist eine Vorrichtung zum Trocknen und Finishen von textilen Warenbahnen bekannt, deren Trockenleistung konventionell, deren Schrumpfleistung jedoch überdurchschnittlich gut ist. Dies wird erreicht mit Hilfe von Transportbändern aus Stahl oder Kevlar-Gewebe, die mit Hilfe von Schlagwalzen in hochfrequente Vibrationen versetzt werden. Diese Vibrationen werden auf die auf den Transportbändern liegende Warenbahn übertragen, so daß die in Faser und Gewebe vorhandenen Spannungen sich abbauen können. Bei dieser Art von Trocknern besteht das Problem, daß die Resonanzfrequenz der vibrierenden Transportbänder durch das Gewicht der Warenbahn verstimmt wird, wobei das Warengewicht eine Funktion der Restfeuchte ist.From EP-A-0 137 066 a device for drying and finishing textile webs is known, the drying performance of which is conventional, but whose shrinking performance is above average. This is achieved with the help of conveyor belts made of steel or Kevlar fabric, which are set into high-frequency vibrations with the help of beater rollers. These vibrations are transmitted to the material web lying on the conveyor belts, so that the tensions present in the fiber and fabric can be reduced. The problem with this type of dryer is that the resonance frequency of the vibrating conveyor belts is detuned by the weight of the material web, the weight of the goods being a function of the residual moisture.

Die Maschine mit der besten Trockenleistung ist derzeit noch die Siebtrommel. Hier wird die Warenbahn zwangsweise von außen nach innen durchströmt. Dabei wird die Warenbahn allerdings fest auf der Trommel fixiert und kann erst wieder abheben, wenn der Luftstrom abreißt und den Übergang zur nächsten Trommel bzw. zum Auslauf der Maschine freigibt. Da der Warenbahn nicht die geringste Bewegungsfreiheit erlaubt ist, verläßt sie die Siebtrommel in den gleichen Dimensionen, mit denen sie eingefahren wurde. Das der Warenbahn inhärente Schrumpfpotential wird also nicht abgebaut. Es muß vielmehr ein eigener Schrumpfprozeß nachgeschaltet werden, da Ware, die beim ersten Waschen um 15 bis 20 % eingeht, heute nicht mehr verkäuflich ist.The machine with the best drying performance is currently the sieve drum. Here, the material web is forced to flow through from the outside in. However, the web is firmly fixed on the drum and can only lift off again when the air flow stops and the transition to the next drum or to the machine outlet is released. Since the web is not allowed the slightest freedom of movement, it leaves the screening drum in the same Dimensions with which it was run in. The shrinkage potential inherent in the web is therefore not reduced. Rather, a separate shrinking process has to be carried out afterwards, since goods that fall by 15 to 20% during the first wash are no longer salable today.

Aus der FR-A-1 314 360 ist eine Konstruktion bekannt, mit der die beschriebenen Nachteile der Siebtrommeltrockner beseitigt werden sollen. Diese Konstruktion ist jedoch ungeeignet, da sie ganz offensichtlich zusätzliche Zugspannungen in der Warenbahn erzeugt.A construction is known from FR-A-1 314 360 with which the disadvantages of the screen drum dryer described are to be eliminated. However, this construction is unsuitable because it obviously creates additional tensile stresses in the web.

Aus der DE-PS 964 948 schließlich ist eine Vorrichtung zum spannungslosen Trocknen von Textilgutbahnen bekannt. Hier wird die Warenbahn auf einem oberen Förderband nach Art eines Hängenschlaufentrockners geführt. Die Warenbahnschleifen selbst liegen auf einem unteren Trageband auf. Der Abstand zwischen dem oberen und dem unteren Trageband kann verändert werden. Die Warenbahn wird von oben mit Luft von geringem Druck, von unten mit Luft von starkem Druck angeblasen.Finally, from DE-PS 964 948 a device for tension-free drying of textile material webs is known. Here the web is guided on an upper conveyor belt in the manner of a hanging loop dryer. The web loops themselves lie on a lower carrying belt. The distance between the upper and the lower carrying strap can be changed. The material web is blown from above with air of low pressure, from below with air of high pressure.

Der vorlegenden Erfindung liegt die Aufgabe zugrunde, das nach der DE-A-2 301 938 bekannte Verfahren sowie die zu seiner Durchführung geeignete Vorrichtung in der Weise zu verbessern, daß eine hervorragende Trockenleistung mit einer hervorragenden Schrumpfleistung erzielt wird.The object of the present invention is to improve the method known from DE-A-2 301 938 and the device suitable for carrying it out in such a way that excellent drying performance is achieved with excellent shrinking performance.

Diese Aufgabe wird gelöst mit dem kennzeichnenden Merkmal des Anspruchs 1 sowie des Anspruchs 5.This object is achieved with the characterizing feature of claim 1 and claim 5.

Bei der vorliegenden Erfindung wird die vom Siebtrommeltrockner her bekannte Durchbelüftung verbunden mit der freien und spannungslosen Bewegung der Warenbahn sowie mit der mechanischen Bearbeitung der Warenbahn. Durch die Anordnung von Saugdüsen gegenüber den Blasdüsen wird die Warenbahn direkt vor den Saugschlitz der Saugdüsen gezogen; daher bleibt der Luft keine andere Wahl, als durch die Ware hindurchzuströmen und dabei auch die in der Tiefe sitzende Feuchtigkeit mitzureißen. Dieser Effekt ist optimal, wenn jeder Blasdüse eine Saugdüse gegenüberliegt, wobei die Blas- bzw. Saugrichtung im wesentlichen senkrecht zur Ebene der Transportbänder gerichtet ist.In the present invention, the aeration known from the drum dryer is connected with the free and tension-free movement of the web as well as with the mechanical processing of the web. By arranging suction nozzles opposite the blowing nozzles, the material web is drawn directly in front of the suction slot of the suction nozzles; Therefore, the air has no choice but to flow through the goods and also carry away the moisture sitting in the depth. This effect is optimal if each blowing nozzle is opposite a suction nozzle, the blowing or suction direction being directed essentially perpendicular to the plane of the conveyor belts.

Die Warenbahn nimmt unter der Wirkung der Blas- und Saugdüsen die bekannte Sinusform ein. Schlagen die Wellenspitzen an Transportbändern an, wird dadurch ein Teil der Relaxationskräfte in die Warenbahn eingebracht. Gleichzeitig wird die Warenbahn soweit fixiert, daß sie einwandfrei gerade transportiert wird und nicht zur Seite wegläuft. Da sich die Wellenspitzen ständig verlagern, ist die Warenbahn sowohl in Längs- als auch in Breitenrichtung frei beweglich, so daß das Material schrumpfen kann.The web takes on the well-known sinus shape under the action of the blowing and suction nozzles. If the shaft tips hit conveyor belts, some of the relaxation forces are brought into the web. At the same time, the web is fixed so far that it is transported perfectly straight and does not run away to the side. Since the shaft tips are constantly shifting, the material web is freely movable in both the longitudinal and the width direction, so that the material can shrink.

Der Rest der Relaxationskräfte wird vorzugsweise durch Vibrationen wenigstens eines der Transportbänder auf die dort anliegenden Wellenspitzen übertragen. Da die Warenbahn nicht insgesamt, sondern nur mit den Wellenspitzen an dem Transportband anliegt, wird dessen Resonanzfrequenz durch das Warengewicht kaum beeinflußt; die einmal eingestellten Werte von Band- und Düsenabstand bzw. Vibrationsfrequenz brauchen nicht nachgestellt zu werden.The rest of the relaxation forces are preferably transmitted to the shaft tips lying there by vibrations of at least one of the conveyor belts. Since the web does not rest on the conveyor belt as a whole, but only with the shaft tips, its resonance frequency is hardly influenced by the weight of the goods; The values of band and nozzle spacing or vibration frequency that have been set do not need to be adjusted.

Ein weiterer Vorteil der Erfindung besteht darin, daß nicht nur mit optimaler Leistung getrocknet und geschrumpft werden kann, sondern daß auch eine optimale Ausrüstung der Ware möglich ist. Bei Plüsch werden die Henkel einwandfrei aufgerichtet, bei Frottierware wird ein Volumen erreicht, wie es sonst nur der Tumbler bringt, Knittereffekte können erzeugt werden usw.Another advantage of the invention is that it is not only possible to dry and shrink with optimum performance, but also that the goods can be optimally equipped. With plush, the handles are raised perfectly, with terry goods a volume is reached, as otherwise only the tumbler brings, crease effects can be created, etc.

Gemäß einer vorteilhaften Weiterbildung der Erfindung wird die Luftmenge der Blasdüsen höher eingestellt als die Luftmenge, die von der gegenüberliegenden Saugdüse durch die Warenbahn hindurchgesaugt wird. Dadurch streicht eine gewisse Luftmenge seitlich über die Ware und glättet dabei die Warenbahn, deren Längskanten sich insbesondere bei aufgeschnittener Schlauchware bekanntlich gern einrollen.According to an advantageous development of the invention, the air quantity of the blowing nozzles is set higher than the air quantity that is sucked through the fabric web by the opposite suction nozzle. As a result, a certain amount of air sweeps laterally over the goods and thereby smoothes the web, the longitudinal edges of which, as is known, tend to curl up, particularly in the case of cut tubular goods.

Die Differenz zwischen Blas- und Saugluft kann vorteilhafterweise auch entsprechend der Feuchtigkeitssättigung der Trocknungsluft eingestellt werden. Die gesättigte Abluft wird aus der Anlage abgeführt und durch eine entsprechende Menge Frischluft ersetzt.The difference between blowing and suction air can advantageously also be set according to the moisture saturation of the drying air. The saturated exhaust air is removed from the system and replaced by an appropriate amount of fresh air.

Die Geschwindigkeit der Transportbänder muß nicht konstant bleiben. Vielmehr wird sie vorzugsweise so verändert, wie es der fortschreitende Schrumpfvorgang vorgibt.The speed of the conveyor belts does not have to remain constant. Rather, it is preferably changed as dictated by the progressive shrinking process.

Wie schon erwähnt, bringt das erfindungsgemäße Prinzip der Durchbelüftung mittels Saugdüsen eine enorme Steigerung der Trockenleistung, wodurch es möglich ist, die Abmessungen der Anlage bei gleichbleibender Trockenleistung gegenüber den Abmessungen bekannter Anlagen drastisch zu reduzieren. Dadurch wird es erforderlich, sich Gedanken zu machen, wie die Bauteile, insbesondere die Düsen, gegenüber bekannten Vorrichtungen verbessert werden können, um die Möglichkeiten der Baugrößenreduzierung nicht wieder zu verschenken. Hierzu wird der Querschnitt der Blas- und Saugdüsen konisch ausgebildet, um über die Länge des Düsenspaltes, die immerhin bis zu 2,5 m erreichen kann, eine gleichbleibende Luftgeschwindigkeit und einen gleichbleibenden Austrittswinkel zu erzielen. Gleichzeitig bleibt die Höhe der Düsen konstant, so daß eine geringe Bauhöhe erreicht wird.As already mentioned, the principle of aeration according to the invention by means of suction nozzles brings about an enormous increase in the drying capacity, which makes it possible to drastically reduce the dimensions of the system with the same drying capacity compared to the dimensions of known systems. This makes it necessary to think about how the components, in particular the nozzles, can be improved compared to known devices in order not to waste the possibilities of reducing the size again. For this purpose, the cross section of the blowing and suction nozzles is conical in order to achieve a constant air speed and a constant exit angle over the length of the nozzle gap, which can reach up to 2.5 m. At the same time, the height remains of the nozzles constant, so that a low overall height is achieved.

Vorteilhafterweise werden aus einer Anzahl von Saug- und Blasdüsen und Vibratoren Module gebildet, die untereinander kombinierbar sind, so daß die fertigen Anlagen in einfacher Weise an die vom Kunden geforderte Leistung angepaßt werden können.Modules which can be combined with one another are advantageously formed from a number of suction and blowing nozzles and vibrators, so that the finished systems can be adapted in a simple manner to the performance required by the customer.

Anhand der Zeichnung soll die Erfindung in Form eines Ausführungsbeispiels näher erläutert werden. Es zeigen

Fig. 1
eine Vorrichtung zum Trocknen, Schrumpfen und Finishen von textilen Warenbahnen in schematisierter, perspektivischer Darstellung,
Fig. 2
ausschnittsweise eine Seitenansicht des Trockners im Bereich der Saug- und Blasdüsen,
Fig. 3
ausschnittsweise eine Seitenansicht des Trockners mit einer ersten Ausführungsform von Vibratoren und
Fig. 4
ausschnittsweise eine Seitenansicht des Trockners mit einer zweiten Ausführungsform der Vibratoren.
Based on the drawing, the invention will be explained in more detail in the form of an embodiment. Show it
Fig. 1
a device for drying, shrinking and finishing textile webs in a schematic, perspective view,
Fig. 2
a partial side view of the dryer in the area of the suction and blowing nozzles,
Fig. 3
a partial side view of the dryer with a first embodiment of vibrators and
Fig. 4
a partial side view of the dryer with a second embodiment of the vibrators.

Fig. 1 zeigt in schematisierter, perspektivischer Darstellung eine Vorrichtung zum Trocknen, Schrumpfen und Finishen von textilen Warenbahnen. Sie besteht im wesentlichen aus drei Grundelementen, dem Wareneinlauf, dem Trockner und dem Warenabzug.Fig. 1 shows a schematic, perspective view of a device for drying, shrinking and finishing textile webs. It essentially consists of three basic elements, the goods inlet, the dryer and the goods take-off.

Die in einem fahrbahren Transportbehälter 10 angeliefert Warenbahn 20 wird über eine Warenbahnführung 30 mit Transportband 31 in die Einlaufkammer 41 des Trockners 40 transportiert.The material web 20 delivered in a mobile transport container 10 is transported via a material web guide 30 with a conveyor belt 31 into the inlet chamber 41 of the dryer 40.

Der Trockner 40 besteht aus sechs dreistöckigen Modulen 40.1...40.6. Durch die Module 40.1...40.6 hindurch laufen insgesamt vier endlose Transportbänder 43.1...43.4. Die Warenbahn 20 läuft mit entsprechender Voreilung zwischen dem Untertrum des oberen Transportbandes 43.1 und dem Obertrum des benachbarten unteren Transportbandes 43.2. Oberhalb des Untertrums und unterhalb des Obertrums sind in jedem Modul abwechselnd zwei Blasdüsen 47 und zwei Saugdüsen 48 angeordnet, so daß jeweils einer Blasdüse 47 je eine Saugdüse 48 gegenüberliegt. Unter der Wirkung der Blas- und Saugdüsen 47, 48 erhält die Warenbahn 20 die bekannte Sinus-Wellenform, wobei die Wellenspitzen jeweils an die Transportbänder 43.1...43.4 anschlagen.The dryer 40 consists of six three-tier modules 40.1 ... 40.6. A total of four endless conveyor belts 43.1 ... 43.4 run through the modules 40.1 ... 40.6. The web 20 runs with a corresponding advance between the lower run of the upper conveyor belt 43.1 and the upper run of the adjacent lower conveyor belt 43.2. Above the lower run and below the upper run, two blowing nozzles 47 and two suction nozzles 48 are alternately arranged in each module, so that one suction nozzle 48 is opposite each blowing nozzle 47. Under the action of the blowing and suction nozzles 47, 48, the web 20 is given the well-known sine wave shape, the wave tips each striking the conveyor belts 43.1 ... 43.4.

Die enorme mechanische Energie, die der Warenbahn 20 bereits durch diese Wellenbildung zugeführt wird, wird noch unterstützt durch Vibration des unteren Transportbandes 43.4 mittels Vibratoren 49. Damit wird die gebildete Welle gezielt gestaucht. Die dadurch erzielten Effekte übertreffen alle Erwartungen: Nicht nur, daß überdehnte Maschen eines Strickstücks in ihre ursprüngliche entspannte Form gebracht werden; bei Plüsch beispielsweise erfolgt eine einwandfreie Aufrichtung der Henkel, bei Frottierware wird ein Volumen erreicht, wie es bisher nur der Tumbler ermöglichte; in der Warenbahn können Knittereffekte erzeugt werden usw.The enormous mechanical energy that is already supplied to the web 20 by this wave formation is further supported by vibration of the lower conveyor belt 43.4 by means of vibrators 49. The wave formed is thus deliberately compressed. The effects achieved thereby exceed all expectations: Not only that overstretched stitches of a knitted piece are brought into their original relaxed shape; with plush, for example, the handles are properly raised, with terry towels a volume is achieved that was previously only possible with the tumbler; crease effects can be created in the web etc.

Um zu verhindern, daß die Warenbahn zwischen den einzelnen Etagen durch ihr Eigengewicht unter Zugspannung gerät, sind dort Übergabebänder 44 oder Übergaberutschen 45 angeordnet.In order to prevent the material web from getting under tension due to its own weight between the individual floors, transfer belts 44 or transfer chutes 45 are arranged there.

Je nach Warenart, Warengewicht und Schrumpfpotential können zum Erreichen der jeweils idealen Wellenform und des optimalen Restkrumpfwertes der Bandabstand und der Düsenabstand, die Transportgeschwindigkeit sowie die Vibrationsfrequenz stufenlos eingestellt werden.Depending on the type of goods, weight of goods and shrinkage potential, the belt gap and the nozzle distance, the transport speed and the Vibration frequency can be set continuously.

Die hohe Trockenleistung wird dadurch ermöglicht, daß die Trockenluft aufgrund der Anordnung jeder Saugdüse gegenüber einer Blasdüse die Warenbahn durchströmen muß und dabei auch in den tieferen Schichten der Warenbahn steckende Feuchtigkeit mit herausreißt.The high drying capacity is made possible by the fact that the drying air has to flow through the web due to the arrangement of each suction nozzle in relation to a blowing nozzle and thereby also tears out moisture that is stuck in the deeper layers of the web.

Geringe Anteile der Blasluft, die die Warenbahn 20 nicht durchdringen, streichen an deren Oberfläche entlang nach außen. Dadurch wird die Warenbahn geglättet. Bei Wirkware werden die Kanten ausgerollt. Dieser Effekt läßt sich noch unterstützen, indem mehr Blasluft aufgeblasen wird als die Saugdüsen durch die Warenbahn hindurchsaugen können.Small portions of the blown air that do not penetrate the web 20 sweep outward along the surface thereof. This will smooth the web. The edges of knitted fabrics are rolled out. This effect can be further supported by blowing up more blown air than the suction nozzles can suck through the material web.

Den Auslauf des Trockners 40 verläßt die Warenbahn 20 über einen Warenabzug 50 mit Auslauftransportband 51, wobei gegebenenfalls noch ein Kühlgebläse und eine Abtafelvorrichtung vorgesehen werden können.The fabric 20 leaves the outlet of the dryer 40 via a fabric take-off 50 with an outlet conveyor belt 51, it also being possible, if appropriate, to provide a cooling fan and a paneling device.

Fig. 2 zeigt in vergrößertem Maßstab einen Ausschnitt aus der Vorrichtung der Fig. 1 im Bereich der Blas- und Saugdüsen 47, 48. Man erkennt die beiden parallel laufenden Transportbänder 43.1, 43.2, auf denen die Warenbahn 20 locker liegend transportiert wird. Die Mundstücke 47.1, 48.1 der Blasdüsen 47 und Saugdüsen 48 grenzen unmittelbar an die Rückseite der Transportbänder 43.1, 43.2 und sind speziell geformt, um ein reibungsloses Passieren der Transportbänder 43.1, 43.2 zu ermöglichen. Auf diese Weise wird ein minimaler Abstand zwischen dem Mundstück 48.1 der Saugdüsen 48 und der Warenbahn 20 erreicht, wodurch sichergestellt wird, daß sich ein ausreichend hoher Saugdruck aufbaut und ein Maximum der Trocknungsluft durch die Warenbahn 20 hindurch in das Mundstück 47.1 der Saugdüsen gesaugt wird. Auch wird die Warenbahn soweit fixiert, daß sie einwandfrei gerade läuft.FIG. 2 shows, on an enlarged scale, a section of the device of FIG. 1 in the area of the blowing and suction nozzles 47, 48. The two parallel conveyor belts 43.1, 43.2 on which the web 20 is transported lying loosely can be seen. The mouthpieces 47.1, 48.1 of the blowing nozzles 47 and suction nozzles 48 directly adjoin the rear of the conveyor belts 43.1, 43.2 and are specially shaped to allow the conveyor belts 43.1, 43.2 to pass smoothly. In this way, a minimum distance between the mouthpiece 48.1 of the suction nozzles 48 and the web 20 is achieved, which ensures that a sufficiently high suction pressure builds up and a maximum of the drying air is sucked through the web 20 into the mouthpiece 47.1 of the suction nozzles. The web is fixed so far that it is flawless is currently running.

Zwischen den Wellentälern und Wellenbergen wird die Warenbahn 20 von den Luftströmungen spannungslos getragen. Die Wellentäler und Wellenberge verlagern sich entsprechend der Transportgeschwindigkeit der Transportbänder 43, so daß alle Teile der Warenbahn 20 intensiv getrocknet und geschrumpft werden.Between the wave valleys and wave crests, the web 20 is carried without tension by the air currents. The wave valleys and wave peaks shift according to the transport speed of the conveyor belts 43 so that all parts of the web 20 are dried and shrunk intensively.

Wird eines der Transportbänder 43 mit Hilfe der Vibratoren 49 in Schwingungen versetzt, werden die Schwingungen auf die Wellentäler bzw. Wellenberge der Warenbahn 20 übertragen, wodurch das Schrumpfen verstärkt wird, ohne das Trocknen zu behindern.If one of the conveyor belts 43 is vibrated with the help of the vibrators 49, the vibrations are transmitted to the troughs or crests of the material web 20, whereby the shrinkage is increased without impeding the drying.

Der Abstand D zwischen den Transportbändern 43.1, 43.2 und entsprechend der Abstand zwischen den Mundstücken 47.1, 48.1 der Blas- und Saugdüsen 47, 48 kann verändert werden, um eine optimale Anpassung an die Eigenschaften der Warenbahn 20 zu ermöglichen.The distance D between the conveyor belts 43.1, 43.2 and correspondingly the distance between the mouthpieces 47.1, 48.1 of the blowing and suction nozzles 47, 48 can be changed in order to enable an optimal adaptation to the properties of the web 20.

Es sei hier erwähnt, daß es möglich ist, das obere Transportband 43.1 und die auf seiner Rückseite angeordneten Saugdüsen 48 zu entfernen. Überraschenderweise leidet die Funktion nicht darunter, lediglich die Trockenleistung pro Längeneinheit geht zurück.It should be mentioned here that it is possible to remove the upper conveyor belt 43.1 and the suction nozzles 48 arranged on its rear side. Surprisingly, the function does not suffer, only the drying performance per unit length decreases.

Die Fig. 3 und 4 zeigen in vergrößerter Darstellung zwei Ausführungsformen von Vibratoren 49, mit deren Hilfe die Transportbänder 43 in Schwingungen versetzt werden können. Es handelt sich um oszillierende Zylinder 490 - hydraulisch oder pneumatisch -, die am Gehäuse des Trockners 40 montiert sind. Die Zylinder 490 bewegen oszillierende Hubstangen 491, an denen mit Hilfe von Drehgelenken 492 zweiarmige Hebel 493 angelenkt sind. Die zweiarmigen Hebel 493 sind mit Hilfe von Lagern 494 am Gehäuse des Trockners 40 gelagert. Die freien Enden der zweiarmigen Hebel 493 tragen Schlag leisten 495, die jeweils das untere Transportband 43.3, 43.4 oder das obere Transportband 43.1, 43.2 in Vibration versetzen.3 and 4 show an enlarged representation of two embodiments of vibrators 49, with the aid of which the conveyor belts 43 can be set in vibration. These are oscillating cylinders 490 - hydraulic or pneumatic - which are mounted on the housing of the dryer 40. The cylinders 490 move oscillating lifting rods 491, to which two-armed levers 493 are articulated by means of rotary joints 492. The two-armed lever 493 are with the help of Bearings 494 mounted on the housing of the dryer 40. The free ends of the two-armed levers 493 carry an impact strip 495, each of which sets the lower conveyor belt 43.3, 43.4 or the upper conveyor belt 43.1, 43.2 in vibration.

Wie Fig. 4 zeigt, können die unteren und oberen Transportbänder 43.1, 43.2, 43.3 auch gemeinsam in Schwingungen versetzt werden, wenn die Resonanzfrequenzen übereinstimmen.As shown in FIG. 4, the lower and upper conveyor belts 43.1, 43.2, 43.3 can also be vibrated together if the resonance frequencies match.

Um die Abnützung der Schlagleisten 495 und der Transportbänder 43 zu reduzieren, können auf die Schlagleisten 495 Schlagrollen 496 drehbar montiert werden.In order to reduce the wear of the blow bars 495 and the conveyor belts 43, blow rollers 496 can be rotatably mounted on the blow bars 495.

Um die Transportbänder 43 in Vibration zu versetzen, können auch rotierende Nockenwellen verwendet werden, wie sie in Fig. 1 im Bereich des untersten Transportbandes 43.4 dargestellt sind.In order to set the conveyor belts 43 in vibration, rotating camshafts can also be used, as shown in FIG. 1 in the area of the lowest conveyor belt 43.4.

Claims (12)

  1. A method of treatment, especially the drying, shrinking and finishing of lengths (20) of textile goods, the length of cloth (20) being fed in with adequate lead and transported by means Of a suitable mechanism, and streams of air being blown by means of blowing nozzles (47) against and sucked by means of suction nozzles (48) lying opposite them through the length of cloth (20), characterized in that
    in the direction of motion of the length of cloth (20) the direction of the streams of air being blown and sucked is reversed alternately.
  2. A method as in Claim 1, characterized in that
       the length of cloth (20) is transported lying between two conveyor belts running essentially in parallel.
  3. A method as in Claim 2, characterized in that
       at least one of the conveyor belts (43.3, 43.4) is set in vibration in sections and that the frequency of vibration is tuned.
  4. A method as in one of the Claims 1 to 3, characterized in that
       the amount of air from the blowing nozzle (47) is set higher than the amount of air which is sucked through the length of cloth (20) by the suction nozzle (48) lying opposite.
  5. An equipment for the treatment, especially the drying, shrinking and finishing of lengths (20) of textile goods, as in Claims 1 to 4, comprising at least one conveyor belt (43) for the length of cloth (20), blowing nozzles (47) which lie transversely above and below the conveyor belts (43) and the streams of air from which respectively lower and raise the length of cloth (20), suction nozzles (48) lying transversely which suck the streams of air through the length of cloth (20), as well as the necessary blower (42) and heating equipments characterized in that every suction nozzle (48) lies opposite a blowing nozzle (47) and that in the direction of motion of the length of cloth (20) blowing and suction nozzles (47, 48) alternate with one another.
  6. An equipment as in Claim 5, characterized in that
       the distance (D) between the conveyor belts (43,1, 43.2) running in parallel and the associated blowing and suction nozzles (47, 48) is adjustable.
  7. An equipment as in Claim 5 or 6, characterized in that
       vibrators (49) are provided which set at least one of the conveyor belts (43.1...43.4) in vibration in sections.
  8. An equipment as in Claim 5, characterized in that
       the streams of air from the blowing nozzles (47) and to the suction nozzles (48) are directed essentially perpendicularly to the conveyor belts (43).
  9. An equipment as in one of the Claims 5 to 8, characterized in that
       the vibrators (49) exhibit at least one rotating camshaft.
  10. An equipment as in one of the Claims 5 to 8, characterized in that
       the vibrators (49) exhibit an oscillating hydraulic or pneumatic cylinder (490), an oscillating lifter rod (491) and at least one oscillating beater bar (495) which beats against one of the conveyor belts (43), a beater roller (496) being mounted to rotate on the beater bar (495).
  11. An equipment as in one of the Claims 5 to 10 characterized in that
       the cross-section of the nozzles (47, 48) is conical and the height of the nozzles (47, 48) is constant.
  12. An equipment as in one of the Claims 7 to 11, characterized in that
       from nozzles (47, 48) and vibrators (49) modules (40.1...40.6) are formed, which may be combined into machines.
EP89116233A 1988-09-03 1989-09-01 Process and apparatus for the treatment of textile webs Expired - Lifetime EP0358136B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89116233T ATE87359T1 (en) 1988-09-03 1989-09-01 METHOD AND DEVICE FOR TREATMENT OF TEXTILE WEBS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3829988A DE3829988A1 (en) 1988-09-03 1988-09-03 METHOD AND DEVICE FOR TREATING TEXTILE TRACKS
DE3829988 1988-09-03

Publications (3)

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EP0358136A2 EP0358136A2 (en) 1990-03-14
EP0358136A3 EP0358136A3 (en) 1991-02-20
EP0358136B1 true EP0358136B1 (en) 1993-03-24

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EP89116233A Expired - Lifetime EP0358136B1 (en) 1988-09-03 1989-09-01 Process and apparatus for the treatment of textile webs

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US (1) US4965918A (en)
EP (1) EP0358136B1 (en)
AT (1) ATE87359T1 (en)
BR (1) BR8904453A (en)
DE (2) DE3829988A1 (en)
ES (1) ES2040425T3 (en)

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NL9500360A (en) * 1995-02-23 1996-10-01 Backus Beheer Bv Method and device for dehumidifying moist products.
US5913590A (en) * 1996-02-22 1999-06-22 Backus Beheer B.V. Method and apparatus for demoisturizing moist products
DE10024358A1 (en) * 2000-05-17 2001-11-22 Voith Paper Patent Gmbh Dryer section
GB0129740D0 (en) * 2001-12-12 2002-01-30 Falmer Investment Ltd Improvements in and relating to processing fabric
JP4425000B2 (en) * 2004-01-06 2010-03-03 株式会社ブリヂストン Rubber member conveying device and rubber member supply system having the same
DE502005008064D1 (en) * 2004-08-10 2009-10-15 Strahm Textile Systems Ag DEVICE FOR LOOSING A TEXTILE MATERIAL RAIL
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ITPR20070100A1 (en) * 2007-12-21 2009-06-22 Imas Spa PROCEDURE AND APPARATUS FOR DRYING PRODUCTS WITH VARIABLE GRANULOMETRY.
IT1392227B1 (en) * 2008-12-03 2012-02-22 Biancalani S P A MACHINE AND METHOD FOR THE MECHANICAL AND THERMAL COMBINED TREATMENT OF FABRICS
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ITPO20150006A1 (en) * 2015-03-22 2016-09-22 Biancalani Srl APPARATUS FOR THE FLUID TRANSPORT OF A TISSUE IN A TREATMENT TUMBLER

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Also Published As

Publication number Publication date
EP0358136A3 (en) 1991-02-20
DE3829988A1 (en) 1990-03-15
EP0358136A2 (en) 1990-03-14
ES2040425T3 (en) 1993-10-16
DE58903871D1 (en) 1993-04-29
BR8904453A (en) 1990-04-17
US4965918A (en) 1990-10-30
ATE87359T1 (en) 1993-04-15

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