EP0292657B1 - Stretcher for thermal treatment of sheet-like materials in the width - Google Patents

Stretcher for thermal treatment of sheet-like materials in the width Download PDF

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Publication number
EP0292657B1
EP0292657B1 EP88103817A EP88103817A EP0292657B1 EP 0292657 B1 EP0292657 B1 EP 0292657B1 EP 88103817 A EP88103817 A EP 88103817A EP 88103817 A EP88103817 A EP 88103817A EP 0292657 B1 EP0292657 B1 EP 0292657B1
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EP
European Patent Office
Prior art keywords
tensioning
chain
cooling air
guide rails
heat treatment
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP88103817A
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German (de)
French (fr)
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EP0292657A3 (en
EP0292657A2 (en
Inventor
Harry Gresens
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Brueckner Trockentechnik GmbH and Co KG
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Brueckner Trockentechnik GmbH and Co KG
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Priority to AT88103817T priority Critical patent/ATE53079T1/en
Publication of EP0292657A2 publication Critical patent/EP0292657A2/en
Publication of EP0292657A3 publication Critical patent/EP0292657A3/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
    • D06C3/02—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by endless chain or like apparatus

Definitions

  • the invention relates to a tensioning machine for the heat treatment of wide webs, in particular textile webs, according to the preamble of claim 1.
  • the tensioning chains intended for transporting the material webs through the machine often have to run at relatively high speeds, and they are also exposed to relatively high treatment temperatures.
  • the chain links of these tension chains are indeed provided with so-called high-temperature greases on their joints, the service life of which depends not only on the chain load but also to a considerable extent on the temperature load that is caused by the respective chain temperature.
  • the tensioning chain can only be cooled by a relatively small amount (for example by a relatively few ° C.), which cannot lead to an effective extension of the service life of high-temperature greases commonly used in tensioning chains, with the fact that the life expectancy is a function of the operating temperature of the grease.
  • the invention is therefore based on the object of providing a tensioning machine of the type required in the preamble of claim 1, which is characterized by particularly effective cooling of the tensioning chains with relatively low construction costs and increased economy of the tensioning machine.
  • a tensioning frame is already known in which the tensioning chains on their way back (i.e. the returning tensioning chain centers) each pass through a channel provided in the form of a closed tube near the outer wall of the machine, through which at least cooling air flows through.
  • this known tensioning machine is specifically designed for cross-stretching thermoplastic films, and nothing is said or illustrated as to whether in this known embodiment, in addition to an inlet field, there are also several heat treatment fields and a web outlet field arranged in succession (it is only indicated that for thermal insulation the entire machine is housed in a closed housing - indicated in the drawing by a dash-dotted line).
  • the returning tension chain runs each through a completely closed pipeline through which cooling air flows, the cross section of which is formed on the one hand by an angularly curved chain support and on the other hand by an approximately angularly curved, double-walled, heat-insulated shielding and is perfect on all sides closed is.
  • Pipelines for supplying and discharging cooling air as well as possibly additional lines or spray nozzles for the additional introduction of cooling liquid are connected to this tubular duct, which is closed on all sides and only for the returning chain centers.
  • the cooling air inflators are only arranged approximately on the length of the longitudinal sections of the chain guide rails running within the web treatment fields. In practice, this means that the cooling air is blown onto at least the returning tension chain centers to a length which is considerably greater than the length of the inlet and outlet fields. This alone can already bring about a very effective, strong cooling of the tension chains, so that this embodiment according to the invention can also bring about a clearly visible gain in service life for the high-temperature greases used.
  • the tensioning machine 1 is used for heat treatment, e.g. Drying and / or fixing, wide webs 2 (see Fig. 2), which are in particular textile webs.
  • the tensioning machine 1 is divided in its longitudinal direction into a number of successive fields, namely that it contains - in the direction of the web transport (arrow 2a) successively - a web inlet field 3, three heat treatment fields 4, 5, 6 and a web outlet field 7.
  • Two in 1 and 2 tension chains 8 and 9, which are only indicated by dash-dotted lines, are arranged endlessly in the longitudinal direction of the tensioning machine through all fields 3 to 7 and at a transverse distance from one another.
  • These tension chains 8, 9 can be designed in the usual way and in this case carry holding elements 11 on chain links 10 (see also FIG.
  • the tensioning machine 1 also contains two cooling air inflators 14 and 15, each of which is assigned to a chain guide rail 12 or 13. According to the invention, these cooling air inflators 14, 15 are only arranged approximately on the length of the longitudinal sections of the chain guide rails 12, 13 which run within the heat treatment fields 4, 5, 6. 3, the arrangement and design of the cooling air inflators 14, 15 is such that the used cooling air can be introduced into the heat treatment fields 4 to 6 as preheated fresh air.
  • the design and arrangement of the cooling air inflators 14, 15 is further provided such that the chain guide rail longitudinal sections running within the heat treatment fields 4, 5, 6 at least in their areas designed for the returning tension chain centers, e.g. 13a in FIG. 3, are each encapsulated in a sheet metal channel 16, 17 serving as a cooling air guide channel, these sheet metal channels 16, 17 also being able to extend in the transverse direction at least above the chain guide rails 12, 13 and thereby an open connection to the interior of the associated one Have heat treatment fields, so that - as can be seen in particular from FIG. 3 - the used cooling air (cf. arrows BL in FIGS.
  • each sheet metal duct 16 17 is attached to each end 16a, 16b and 17a, 17b of each sheet metal duct 16, 17, which is connected to the pressure side of the associated (separate) cooling air blower 18 to 21 .
  • cooling air can be blown in at long ends of the sheet metal ducts 16, 17, and in each case expediently about 50% of the total cooling air from the front and rear ends of the corresponding sheet metal duct.
  • each sheet metal duct is provided with a cooling air connecting piece which is connected to the pressure side of a single, associated cooling air blower.
  • each cooling air blower 18-21 can be supplied with cooling air from any suitable cooling air source. However, it has proven to be particularly expedient if each cooling air blower 18 to 21 is acted upon by cold room air or ambient air from the tensioning machine 1. High-pressure fans are particularly suitable as cooling air blowers for the cooling air inflators 14, 15.
  • the measured values listed in the table were obtained by measuring the contact on the chain clips.
  • the table shows very clearly that the tensioning chains 8 and 9 can be cooled very effectively with the aid of the tensioning machine 1 designed according to the invention, ie by the configuration and arrangement of the cooling air inflating devices 14 and 15 according to the invention. If, for example, the temperatures of the chain clips at the tenter inlet are compared, then the temperature of the chain clips in the tenter at an air temperature (treatment air temperature) of 120 ° C. without cooling is 85 ° C., while it is only 52 ° C. with the cooling according to the invention, which is makes a difference of 33 ° C.
  • the significantly reduced temperature of the chain clips explained above with reference to the table due to the cooling according to the invention can also be read from the temperature diagram in FIG.
  • the various treatment air temperature values (in ° C) within the tensioning machine 1 are entered on the ordinate and the chain clip temperature values (also in ° C), determined by contact measurement, are entered on the abscissa.
  • curve E shows the temperature values of the chain clips at the tensioner inlet
  • curve A the chain clip temperature values at the tensioner outlet, in each case with tension chains 8, 9 cooled according to the invention
  • curves E 'and A' illustrate the chain clip temperature values for uncooled tension chains.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

1. Tensioning machine for the heat treatment of lengths of material which are guided widthways, in particular lengths of textile material, containing a) a material inlet zone (3), a plurality of heat treatment zones (4 to 6) and a material outlet zone (7), all the zones being arranged in succession in the longitudinal direction of the tensioning machine (1), b) two tensioning chains (8, 9) which run continuously in the longitudinal direction of the tensioning machine through all the zones and are an oblique distance apart and on chain links (10) which are flexibly connected to one another bear holding elements (11) for gripping the two long edges of the lengths of material (2) to be treated, c) chain guide rails (12, 13) to support and guide the advancing and returning strands of the two tensioning chains, d) cooling air blowing arrangements (14, 15) which are associated with long sections of the chain guide rails at least in the region of the returning strand of the tensioning chain, characterised in that e) the cooling air blowing arrangements (14, 15) which are only arranged approximately on the length of the long sections of the chain guide rails (12, 13) which run inside the heat treatment zones (4, 5, 6), are constructed in such a way that these long sections of the chain guide rails are each enclosed at least in their outer regions (e.g. 13a) constructed for the returning strands of the tensioning chain in a sheet metal channel (16, 17) serving as a cooling air guide channel, and these channels also extend in the transverse direction at least above the chain guide rails (12, 13) and thus have an open connection to the interior of the appertaining heat treatment zones so that used cooling air is introduced into the heat treatment zones through the inner regions (e.g. 13b) of the chain guide rails (12, 13) associated with the advancing strands of the tensioning chain (e.g. 9a).

Description

Die Erfindung betrifft eine Spannmaschine zur Wärmebehandlung von breitgeführten Warenbahnen, insbesondere Textilbahnen, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a tensioning machine for the heat treatment of wide webs, in particular textile webs, according to the preamble of claim 1.

In Spannmaschinen, insbesondere moderneren Spannmaschinen, müssen die zum Transport der Warenbahnen durch die Maschine bestimmten Spannketten vielfach mit relativ hohen Geschwindigkeiten umlaufen, wobei sie außerdem noch relativ hohen Behandlungstemperaturen ausgesetzt sind. Die Kettenglieder dieser Spannketten sind an ihren Gelenken zwar mit sogenannten Hochtemperaturfetten versehen, deren Lebensdauer neben der Kettenbelastung auch in einem beträchtlichen Umfange von der Temperaturbelastung abhängt, die von der jeweiligen Kettentemperatur ausgeht.In tensioning machines, in particular modern tensioning machines, the tensioning chains intended for transporting the material webs through the machine often have to run at relatively high speeds, and they are also exposed to relatively high treatment temperatures. The chain links of these tension chains are indeed provided with so-called high-temperature greases on their joints, the service life of which depends not only on the chain load but also to a considerable extent on the temperature load that is caused by the respective chain temperature.

Man ist daher bestrebt, die Kettentemperatur möglichst niedrig zu halten, um dadurch die Lebensdauer der verwendeten Hochtemperaturfette zu erhöhen. So ist es für diesen Zweck u.a. bereits vorgeschlagen worden (DE-OS 35 26 584), bei einer Spannmaschine den Kettenführungsschienen in den Längsabschnitten, die sich im Bereich des Warenbahn-Einlaßfeldes und/oder des Waren bahn-Auslaßfeldes befinden, Kühlluft-Aufblaseinrichtungen zuzuordnen. Auf diese Weise sollen vor allem die im Bereich außerhalb der Wärmebehandlungsfelder verlaufenden Spannkettenabschnitte mit kalter Luft beblasen und dadurch etwas abgekühlt werden. Bei der praktischen Durchführung dieser bekannten Spannmaschinenausbildung läßt sich die Spannkette jedoch nur um einen relativ kleinen Betrag (beispielsweise um relativ wenige °C) abkühlen, was zu keiner effektiven Verlängerung der Lebensdauer von üblicherweise bei Spannketten verwendeten Hochtemperaturfetten führen kann, wobei zu bedenken ist, daß die Lebensdauererwartung eine Funktion der Betriebstemperatur des Fettes ist.Efforts are therefore made to keep the chain temperature as low as possible in order to increase the service life of the high-temperature greases used. So it has already been proposed for this purpose (DE-OS 35 26 584), to assign cooling air inflators to the chain guide rails in a longitudinal machine in the longitudinal sections which are in the area of the web inlet field and / or the web outlet field . In this way, the tension chain sections running in the area outside the heat treatment fields are to be blown with cold air and thereby cooled somewhat. In the practical implementation of this known tensioner design, however, the tensioning chain can only be cooled by a relatively small amount (for example by a relatively few ° C.), which cannot lead to an effective extension of the service life of high-temperature greases commonly used in tensioning chains, with the fact that the life expectancy is a function of the operating temperature of the grease.

Als weiterer Nachteil der bekannten Spannmaschine sei erwähnt, daß dort die vor- und rücklaufenden Trums der Spannketten von unten her, d.h. durch in den Laufflächen vorgesehene Bohrungen mit Kühlluft beblasen werden. Die dafür notwendigen konstruktiven Maßnahmen im Bereich der Kettenführungsschienen bedingen einen erheblichen zusätzlichen Bauaufwand.As a further disadvantage of the known tensioning machine it should be mentioned that there the forward and backward runs of the tensioning chains from below, i.e. be blown with cooling air through the holes provided in the treads. The structural measures required for this in the area of the chain guide rails require considerable additional construction work.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Spannmaschine der im Oberbegriff des Patentanspruches 1 vorausgesetzten Art zu schaffen, die sich durch eine besonders wirkungsvolle Kühlung der Spannketten bei relativ niedrigem Bauaufwand und erhöhter Wirtschaftlichkeit der Spannmaschine auszeichnet.The invention is therefore based on the object of providing a tensioning machine of the type required in the preamble of claim 1, which is characterized by particularly effective cooling of the tensioning chains with relatively low construction costs and increased economy of the tensioning machine.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Anspruches 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Aus der GB-A 971 737 ist nun zwar bereits ein Spannrahmen bekannt, bei dem die Spannketten auf ihrem Rückweg (also die rücklaufenden Spannkettentrums) je einen in der Nähe der Außenwand der Maschine vorgesehenen Kanal in Form eines geschlossenen Rohres durchlaufen, durch den zumindest Kühlluft hindurchströmt. Diese bekannte Spannmaschine ist jedoch speziell zum Querspannen von thermoplastischen Folien bestimmt, und es ist nichts darüber ausgesagt bzw. veranschaulicht, ob bei dieser bekannten Ausführung neben einem Einlaßfeld auch mehrere Wärmebehandlungsfelder sowie ein Warenbahn-Auslaßfeld aufeinanderfolgend angeordnet sind (es ist lediglich angedeutet, daß zur thermischen Isolation die ganze Maschine in einem geschlossenen Gehäuse - in der Zeichnung durch strichpunktierte Linie angedeutet - untergebracht ist). Nach dem dort näher beschriebenen Ausführungsbeispiel laufen die rücklaufenden Spannkettentrums jeweils durch eine vollkommen geschlossene, von Kühlluft durchströmte Rohrleitung, die in ihrem Querschnitt einerseits durch eine winkelförmig gebogene Kettenabstützung und andererseits durch eine ebenfalls etwa winkelförmig gebogene, doppelwandige, wärmeisolierte Abschirmung gebildet und nach allen Seiten vollkommen geschlossen ist. An diesen allseits geschlossenen, rohrförmigen Kanal nur für die rücklaufenden Kettentrums sind Rohrleitungen zum Zuführen und Ableiten von Kühlluft sowie eventuell zusätzliche Leitungen bzw. Sprühdüsen zum zusätzlichen Einbringen von Kühlflüssigkeit angeschlossen.From GB-A 971 737 a tensioning frame is already known in which the tensioning chains on their way back (i.e. the returning tensioning chain centers) each pass through a channel provided in the form of a closed tube near the outer wall of the machine, through which at least cooling air flows through. However, this known tensioning machine is specifically designed for cross-stretching thermoplastic films, and nothing is said or illustrated as to whether in this known embodiment, in addition to an inlet field, there are also several heat treatment fields and a web outlet field arranged in succession (it is only indicated that for thermal insulation the entire machine is housed in a closed housing - indicated in the drawing by a dash-dotted line). According to the exemplary embodiment described in more detail there, the returning tension chain runs each through a completely closed pipeline through which cooling air flows, the cross section of which is formed on the one hand by an angularly curved chain support and on the other hand by an approximately angularly curved, double-walled, heat-insulated shielding and is perfect on all sides closed is. Pipelines for supplying and discharging cooling air as well as possibly additional lines or spray nozzles for the additional introduction of cooling liquid are connected to this tubular duct, which is closed on all sides and only for the returning chain centers.

Im Gegensatz zu den eingangs geschilderten bekannten Ausführungen sind also bei der erfindungsgemäßen Spannmaschine die Kühlluft-Aufblaseinrichtungen nur etwa auf der Länge der innerhalb der Warenbahn-Behandlungsfelder verlaufenden Längsabschnitte der Kettenführungsschienen angeordnet. Dies bedeutet in der Praxis, daß die Kühlluft zumindest auf die rücklaufenden Spannkettentrums auf eine Länge aufgeblasen wird, die ganz beträchtlich größer ist als die Länge der Einlaß- und Auslaßfelder. Allein hierdurch kann bereits eine sehr wirkungsvolle, starke Abkühlung der Spannketten herbeigeführt werden, so daß durch diese erfindungsgemäße Ausführung auch ein deutlich sichtbar werdender Gewinn an Lebensdauer für die verwendeten Hochtemperaturfette herbeigeführt werden kann.In contrast to the known designs described at the outset, in the tensioning machine according to the invention the cooling air inflators are only arranged approximately on the length of the longitudinal sections of the chain guide rails running within the web treatment fields. In practice, this means that the cooling air is blown onto at least the returning tension chain centers to a length which is considerably greater than the length of the inlet and outlet fields. This alone can already bring about a very effective, strong cooling of the tension chains, so that this embodiment according to the invention can also bring about a clearly visible gain in service life for the high-temperature greases used.

Ein weiterer Vorteil der erfindungsgemäßen Ausführung wird aus folgendem Sachverhalt deutlich: bei diesen bekannten Spannmaschinen wird die Kühlluft im allgemeinen aus dem die Spannmaschine umgebenden Raum entnommen, auf die Spannketten (im Bereich des Einlaß- und/oder Auslaßfeldes bzw. in dem das rücklaufende Kettentrum umgebenden rohrförmigen Kanal) aufgeblasen und dann wieder in den umgebenden Raum abgeführt. Bei den ohnehin hohen Wärmebelastungen in Textilveredlungsbetrieben ist dies eine sehr unangenehme und unerwünschte Begleiterscheinung. Da demgegenüber bei der erfindungsgemäßen Spannmaschine die Kühlluft auf die Spannketten nur im Bereich innerhalb der Wärmebehandlungsfelder aufgeblasen wird und die verbrauchte Kühlluft dann als vorgewärmte Frischluft in die Wärmebehandlungsfelder eingeführt werden kann, treten bei dieser erfindungsgemäßen Ausführung weder unerwünschte Raumbelastungen (mit entsprechend aufgewärmter Kettenkühlungs-Abluft) noch Wärmeverluste auf. Die den Spannketten bei ihrer Kühlung entnommene Wärme kommt somit auf dem Wege der Frischluftzuführung dem Wärmebehandlungsprozeß innerhalb der Spannmaschine unmittelbar zugute, so daß hierdurch bei stark verbesserter Kettenkühlung auch noch die Wirtschaftlichkeit der Spannmaschine entsprechend erhöht werden kann.A further advantage of the embodiment according to the invention is clear from the following facts: in these known tensioning machines, the cooling air is generally taken from the space surrounding the tensioning machine, onto the tensioning chains (in the area of the inlet and / or outlet field or in the area surrounding the returning chain center) tubular duct) inflated and then discharged back into the surrounding space. With the already high thermal loads in textile finishing companies, this is a very unpleasant and undesirable side effect. In contrast, since in the tensioning machine according to the invention the cooling air is only blown onto the tension chains in the area within the heat treatment fields and the used cooling air can then be introduced into the heat treatment fields as preheated fresh air, in this embodiment according to the invention neither undesirable space loads occur (with correspondingly warmed up chain cooling exhaust air) still Heat loss on. The heat removed from the tensioning chains during their cooling thus directly benefits the heat treatment process within the tensioning machine on the way of fresh air supply, so that the economy of the tensioning machine can also be increased accordingly with greatly improved chain cooling.

Bei Spannmaschinen ist ferner allgemein zu beachten, daß die meisten warenführenden und Kettenservice-Baugruppen im Bereich der außen (außerhalb der Wärmebehandlungsfelder) befindlichen Spannketten und Kettenführungsschienen vorgesehen sind, diese Bereiche also schon deswegen für die Anbringung zusätzlicher Einrichtungen, wie die Kühlluft-Aufblaseinrichtungen, ungeeignet erscheinen. Demgegenüber sind bei der vorliegenden Erfindung die Kühlluft-Aufblaseinrichtungen im Innern der Wärmebehandlungsfelder angeordnet, wo sie die zuvor erwähnten Baugruppen nicht beeinträchtigen können und somit schon aus diesem Grunde dem Gesamtaufbau und der Wartung der Spannmaschine viel dienlicher sind.In the case of tensioning machines, it should also be noted in general that most goods-carrying and chain service assemblies are provided in the area of the tension chains and chain guide rails located outside (outside the heat treatment fields), making these areas unsuitable for the attachment of additional devices such as the cooling air inflators appear. In contrast, in the present invention, the cooling air inflators are arranged inside the heat treatment fields, where they cannot adversely affect the aforementioned assemblies and are therefore, for this reason alone, much more useful for the overall construction and maintenance of the stenter.

Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Further advantageous refinements and developments of the invention are the subject of the dependent claims.

Die Erfindung sei im folgenden anhand der Zeichnung näher erläutert. In der Zeichnung zeigen

  • Fig.1 eine ganz schematisch gehaltene (Teil-) Seitenansicht der erfindungsgemäßen Spannmaschine;
  • Fig.2 eine vereinfachte, schematische Aufsicht auf die erfindungsgemäße Spannmaschine (bei abgedeckten Wärmebehandlungsfeldern);
  • Fig.3 eine Querschnittsansicht etwa entlang der Linie 111-111 in Fig.2, darstellend einen Querschnitt durch eine Kettenführungsschiene (mit Spannkette) in vergrößertem Maßstab;
  • Fig.4 ein Temperatur-Diagramm zur Gegenüberstellung gekühlter und ungekühlter Kluppen bei verschiedenen Lufttemperaturen in der Spannmaschine.
The invention is explained in more detail below with reference to the drawing. Show in the drawing
  • 1 shows a very schematic (partial) side view of the tensioning machine according to the invention;
  • 2 shows a simplified, schematic top view of the tensioning machine according to the invention (with covered heat treatment fields);
  • 3 shows a cross-sectional view approximately along the line 111-111 in FIG. 2, illustrating a cross section through a chain guide rail (with tension chain) on an enlarged scale;
  • 4 shows a temperature diagram to compare cooled and uncooled clips at different air temperatures in the stenter.

Anhand der Fig.1 und 2 sei zunächst der allgemeine Aufbau der erfindungsgemäßen Spannmaschine 1 erläutert. Die Spannmaschine 1 dient zur Wärmebehandlung, z.B. Trocknen und/oder Fixieren, von breitgeführten Warenbahnen 2 (vgl. Fig.2), bei denen es sich insbesondere um textile Warenbahnen handelt.The general structure of the tensioning machine 1 according to the invention will first be explained with reference to FIGS. The tensioning machine 1 is used for heat treatment, e.g. Drying and / or fixing, wide webs 2 (see Fig. 2), which are in particular textile webs.

Die Spannmaschine 1 ist in ihrer Längsrichtung in eine Anzahl von aufeinanderfolgenden Feldern unterteilt, und zwar enthält sie - in Richtung des Warenbahn-Transports (Pfeil 2a) aufeinanderfolgend - ein Warenbahneinlaßfeld 3, drei Wärmebehandlungsfelder 4, 5, 6 und ein Warenbahnauslaßfeld 7. Zwei in den Fig.1 und 2 nur vereinfacht strichpunktiert angedeutete Spannketten 8 und 9 sind in Spannmaschinen-Längsrichtung durch alle Felder 3 bis 7 endlos umlaufend und mit Querabstand voneinander angeordnet. Diese Spannketten 8, 9 können in üblicher Weise ausgeführt sein und dabei an gelenkig miteinander verbundenen Kettengliedern 10 (vgl. auch Fig.3) Halteelemente 11 tragen, die gemäß Fig.3 in Form von bekannten Kluppen 11 oder ansonsten auch in Form von Nadelleisten oder kombinierten Kluppen ausgeführt sein können, um die beiden Längsränder der zu behandelnden Warenbahnen 2 während des Warenbahntransportes (an den vorlaufenden Trums der Spannketten) festzuhalten. Die vor- und rücklaufenden Trums beider Spannketten 8, 9 werden in zugeordneten, an sich bekannten Kettenführungsschienen 12, 13 geführt.The tensioning machine 1 is divided in its longitudinal direction into a number of successive fields, namely that it contains - in the direction of the web transport (arrow 2a) successively - a web inlet field 3, three heat treatment fields 4, 5, 6 and a web outlet field 7. Two in 1 and 2, tension chains 8 and 9, which are only indicated by dash-dotted lines, are arranged endlessly in the longitudinal direction of the tensioning machine through all fields 3 to 7 and at a transverse distance from one another. These tension chains 8, 9 can be designed in the usual way and in this case carry holding elements 11 on chain links 10 (see also FIG. 3) which are connected to one another in an articulated manner, which according to FIG Combined clips can be designed to hold the two longitudinal edges of the webs to be treated 2 during web transport (on the leading strands of the tension chains). The forward and return runs of both tension chains 8, 9 are guided in associated, known chain guide rails 12, 13.

Die Spannmaschine 1 enthält ferner zwei Kühlluft-Aufblaseinrichtungen 14 und 15, die jeweils einer Kettenführungsschiene 12 bzw. 13 zugeordnet sind. Erfindungsgemäß sind diese Kühlluft-Aufblaseinrichtungen 14, 15 nur etwa auf der Länge der innerhalb der Wärmebehandlungsfelder 4, 5, 6 verlaufenden Längsabschnitte der Kettenführungsschienen 12, 13 angeordnet. Wie sich aus der detaillierteren Erläuterung zur Fig.3 noch ergeben wird, ist die Anordnung und Ausbildung der Kühlluft-Aufblaseinrichtungen 14, 15 dabei derart, daß die verbrauchte Kühlluft als vorgewärmte Frischluft in die Wärmebehandlungsfelder 4 bis 6 eingeführt werden kann.The tensioning machine 1 also contains two cooling air inflators 14 and 15, each of which is assigned to a chain guide rail 12 or 13. According to the invention, these cooling air inflators 14, 15 are only arranged approximately on the length of the longitudinal sections of the chain guide rails 12, 13 which run within the heat treatment fields 4, 5, 6. 3, the arrangement and design of the cooling air inflators 14, 15 is such that the used cooling air can be introduced into the heat treatment fields 4 to 6 as preheated fresh air.

Die Ausbildung und Anordnung der Kühlluft-Aufblaseinrichtungen 14, 15 ist dabei ferner so vorgesehen, daß die innerhalb der Wärmebehandlungsfelder 4, 5, 6 verlaufenden Kettenführungsschienen-Längsabschnitte zumindest in ihren für die rücklaufenden Spannkettentrums ausgebildeten Bereichen, z.B. 13a in Fig.3, in je einen als Kühlluft-Führungskanal dienenden Blechkanal 16, 17 eingekapselt sind, wobei diese Blechkanäle 16, 17 sich in Querrichtung auch zumindest oberhalb der Kettenführungsschienen 12, 13 noch erstrecken können und dabei eine offene Verbindung zum Innern der zugehörigen Wärmebehandlungsfelder aufweisen, so daß - wie sich insbesondere aus Fig.3 ergibt - die verbrauchte Kühlluft (vgl. Pfeile BL in Fig.2 und 3) durch die den vorlaufenden Spannkettentrums zugeordneten inneren Bereiche, z.B. 13b, der Kettenführungsschienen 12, 13 in die Wärmebehandlungsfelder gelangt. Je nach Gesamtlänge der Spannmaschine 1 bzw. der Wärmebehandlungsfelder 4, 5, 6 und somit je nach Länge der Blechkanäle 16, 17 ist an jeden Blechkanal 16 bzw. 17 wenigstens ein Kühlluftgebläse angeschlossen. Im Falle der Fig.1 und 2 sei angenommen, daß es sich um eine relativ große Gesamtlänge der Wärmebehandlungsfelder 4, 5, 6 handelt, so daß dort jedem Blechkanal 16, 17 zwei Kühlluftgebläse 18, 19 bzw. 20, 21 zugeordnet sind. Zweckmäßig ist dabei an jedem Ende 16a, 16b bzw. 17a, 17b jedes Blechkanales 16,17 ein Kühlluft-Anschlußstutzen 22 (vgl. auch Fig.3) angebracht, der jeweils mit der Druckseite des zugehörigen (gesonderten) Kühlluftgebläses 18 bis 21 verbunden ist. Auf diese Weise kann bei langen Spannmaschinen an beiden Enden der Blechkanäle 16,17 Kühlluft eingeblasen werden, und zwar zweckmäßig jeweils etwa 50 % der gesamten Kühlluft vom vorderen und vom hinteren Ende des entsprechenden Blechkanales.The design and arrangement of the cooling air inflators 14, 15 is further provided such that the chain guide rail longitudinal sections running within the heat treatment fields 4, 5, 6 at least in their areas designed for the returning tension chain centers, e.g. 13a in FIG. 3, are each encapsulated in a sheet metal channel 16, 17 serving as a cooling air guide channel, these sheet metal channels 16, 17 also being able to extend in the transverse direction at least above the chain guide rails 12, 13 and thereby an open connection to the interior of the associated one Have heat treatment fields, so that - as can be seen in particular from FIG. 3 - the used cooling air (cf. arrows BL in FIGS. 2 and 3) through the inner areas assigned to the leading tension chain centers, for example 13b, the chain guide rails 12, 13 get into the heat treatment fields. Depending on the total length of the tensioning machine 1 or the heat treatment fields 4, 5, 6 and thus depending on the length of the sheet metal channels 16, 17, at least one cooling air blower is connected to each sheet metal channel 16 or 17. In the case of FIGS. 1 and 2, it is assumed that there is a relatively large total length of the heat treatment fields 4, 5, 6, so that there two cooling air blowers 18, 19 and 20, 21 are assigned to each sheet metal duct 16, 17. Appropriately, a cooling air connection piece 22 (cf. also FIG. 3) is attached to each end 16a, 16b and 17a, 17b of each sheet metal duct 16, 17, which is connected to the pressure side of the associated (separate) cooling air blower 18 to 21 . In this way, cooling air can be blown in at long ends of the sheet metal ducts 16, 17, and in each case expediently about 50% of the total cooling air from the front and rear ends of the corresponding sheet metal duct.

Es versteht sich von selbst, daß bei kürzeren Spannmaschinen nur ein Ende jedes Blechkanales mit einem Kühlluft-Anschlußstutzen versehen ist, der mit der Druckseite eines einzigen, zugehörigen Kühlluftgebläses in Verbindung steht..It goes without saying that, in the case of shorter tensioning machines, only one end of each sheet metal duct is provided with a cooling air connecting piece which is connected to the pressure side of a single, associated cooling air blower.

Generell kann jedes Kühlluftgebläse 18 bis 21 mit Kühlluft von irgendeiner geeigneten Kühlluftquelle beaufschlagt werden. Als besonders zweckmäßig hat es sich jedoch herausgestellt, wenn jedes Kühlluftgebläse 18 bis 21 mit kalter Raumluft bzw. Umgebungsluft der Spannmaschine 1 beaufschlagt wird. Als Kühlluftgebläse für die Kühlluft-Aufblaseinrichtungen 14, 15 sind vor allem Hochdruckventilatoren geeignet.In general, each cooling air blower 18-21 can be supplied with cooling air from any suitable cooling air source. However, it has proven to be particularly expedient if each cooling air blower 18 to 21 is acted upon by cold room air or ambient air from the tensioning machine 1. High-pressure fans are particularly suitable as cooling air blowers for the cooling air inflators 14, 15.

Wie sich der Querschnittsansicht in Fig.3 entnehmen läßt, sind die Kettenführungsschienen 12, 13 in ihren innerhalb der Wärmebehandlungsfelder 4, 5, 6 verlaufenden Längsabschnitten nach außen hin - bis auf die Kühlluft-Anschlußstutzen 22 - vollkommen abgeschlossen. Auf diese Weise erfolgt eine äu- βerst zuverlässige Zuführung der Kühlluft (vgl. gestrichelte Pfeile) in die Blechkanäle 16, 17 und von dort unmittelbar an die Spannketten 8, 9. In Fig.3 ist lediglich ein Querschnitt durch die Kettenführungsschiene 13 1und die von ihr getragene Spannkette 9 mit ihren vorlaufenden und rücklaufenden Trums 9a und 9b veranschaulicht; in gleichartiger, spiegelbildlicher Anordnung sind die andere Kettenführungsschiene 12 und die dort zugehörige Spannkette 8 ausgebildet und angeordnet.As can be seen from the cross-sectional view in FIG. 3, the chain guide rails 12, 13 are completely closed off in their longitudinal sections running inside the heat treatment fields 4, 5, 6 - except for the cooling air connecting piece 22. In this way, an extremely reliable supply of the cooling air (see dashed arrows) into the sheet metal channels 16, 17 and from there directly to the tension chains 8, 9. In FIG. 3 there is only a cross section through the chain guide rail 13 1 and from their carried tension chain 9 with their leading and returning strands 9a and 9b illustrates; The other chain guide rail 12 and the tension chain 8 associated there are designed and arranged in a similar, mirror-image arrangement.

Bei den der Erfindung zugrundeliegenden Versuchen wurden Temperaturmessungen an der Spannmaschine bei verschiedenen Betriebstemperaturen, d.h. bei verschiedenen Behandlungsluft-Temperaturen an den Spannketten und dort insbesondere an den Kettenkluppen 11 durchgeführt, wobei - wie die nachfolgende Tabelle zeigt - die Temperaturmessungen an den Kettenkluppen 11 einmal ohne Spannkettenkühlung und einmal mit Spannkettenkühlung sowohl am Spannmaschineneinlaß als auch am Spannmaschinenauslaß vorgenommen worden sind.

Figure imgb0001
In the experiments on which the invention is based, temperature measurements were carried out on the tensioning machine at different operating temperatures, that is to say at different treatment air temperatures, on the tensioning chains and there in particular on the chain clips 11, the temperature measurements on the chain clips 11, as shown in the table below, once without tensioning chain cooling and once with tension chain cooling at both the tenter inlet and the tenter outlet.
Figure imgb0001

Die in der Tabelle angeführten Meßwerte wurden erhalten durch eine Kontaktmessung an den Kettenkluppen.The measured values listed in the table were obtained by measuring the contact on the chain clips.

Die Tabelle zeigt sehr deutlich, daß mit Hilfe der erfindungsgemäß ausgeführten Spannmaschine 1, d.h. durch die erfindungsgemäße Ausbildung und Anordnung der Kühlluft-Aufblaseinrichtungen 14 und 15 eine sehr effektive Kühlung der Spannketten 8 und 9 erzielt werden kann. Vergleicht man beispielsweise die Temperaturen der Kettenkluppen am Spannmaschinen-Einlaß, dann beträgt die Temperatur der Kettenkluppen in der Spannmaschine bei einer Lufttemperatur (Behandlungslufttemperatur) von 120°C ohne Kühlung 85°C, während sie mit der erfindungsgemäßen Kühlung nur 52°C beträgt, was einen Unterschied von 33°C ausmacht. Bei den höheren Behandlungslufttemperaturen in der Spannmaschine wirken sich diese Unterschiede zwischen nicht besonders gekühlten Kettenkluppen und erfindungsgemäß gekühlten Kettenkluppen noch deutlicher aus: Beispielsweise bei einer Behandlungslufttemperatur von 220°C weisen die Kluppenketten am Einlaß ohne Kühlung 148°C und mit erfindungsgemäßer Kühlung nur 82°C auf (also ein Unterschied von 66°C!).The table shows very clearly that the tensioning chains 8 and 9 can be cooled very effectively with the aid of the tensioning machine 1 designed according to the invention, ie by the configuration and arrangement of the cooling air inflating devices 14 and 15 according to the invention. If, for example, the temperatures of the chain clips at the tenter inlet are compared, then the temperature of the chain clips in the tenter at an air temperature (treatment air temperature) of 120 ° C. without cooling is 85 ° C., while it is only 52 ° C. with the cooling according to the invention, which is makes a difference of 33 ° C. At the higher treatment air temperatures in the tentering machine, these differences between chain clips not particularly cooled and chain clips cooled according to the invention have an even clearer effect: for example at a treatment air temperature of 220 ° C., the clip chains have 148 ° C. at the inlet without cooling and only 82 ° C. with cooling according to the invention on (a difference of 66 ° C!).

Diese in der Tabelle angeführten Temperaturwerte der Kettenkluppen bei den verschiedenen Behandlungslufttemperaturen in der Spannmaschine unterstreichen somit die besondere Wirksamkeit der erfindungsgemäßen Spannkettenkühlung, so daß die Lebensdauer der in den Spannkettengliedern verwendeten Hochtemperaturfette bei verbessertem Spannmaschinen-Wirkungsgrad und relativ einfachem konstruktiven Aufbau der Kühlluft-Aufblaseinrichtungen 14, 15 erheblich verlängert werden kann.These temperature values of the chain clips indicated in the table at the various treatment air temperatures in the tensioning machine thus underline the particular effectiveness of the tension chain cooling according to the invention, so that the service life of those in the tension chain links is used ten high-temperature greases with improved tenter efficiency and relatively simple structural design of the cooling air inflators 14, 15 can be extended considerably.

Die zuvor anhand der Tabelle erläuterte, deutlich herabgesetzte Temperatur der Kettenkluppen aufgrund der erfindungsgemäßen Kühlung läßt sich auch aus dem Temperaturdiagramm in Fig.4 ablesen. In diesem Diagramm sind an der Ordinaten die verschiedenen Behandlungslufttemperaturwerte (in °C) innerhalb der Spannmaschine 1 und an der Abszisse die - durch Kontaktmessung festgestellten - Kettenkluppen-Temperaturwerte (ebenfalls in °C) eingetragen. In den wiedergegebenen Kurven dieses Diagrammes gemäß Fig.4 zeigt die Kurve E die Temperaturwerte der Kettenkluppen am Spannmaschinen- Einlaß und die Kurve A die Kettenkluppen-Temperaturwerte am Spannmaschinenauslaß, jeweils bei erfindungsgemäß gekühlten Spannketten 8, 9, während die Kurven E' und A' die Kettenkluppen-Temperaturwerte bei ungekühlten Spannketten veranschaulichen.The significantly reduced temperature of the chain clips explained above with reference to the table due to the cooling according to the invention can also be read from the temperature diagram in FIG. In this diagram, the various treatment air temperature values (in ° C) within the tensioning machine 1 are entered on the ordinate and the chain clip temperature values (also in ° C), determined by contact measurement, are entered on the abscissa. In the curves shown in this diagram according to FIG. 4, curve E shows the temperature values of the chain clips at the tensioner inlet and curve A the chain clip temperature values at the tensioner outlet, in each case with tension chains 8, 9 cooled according to the invention, while curves E 'and A' illustrate the chain clip temperature values for uncooled tension chains.

Claims (5)

1. Tensioning machine for the heat treatment of lengths of material which are guided widthways, in particular lengths of textile material, containing
a) a material inlet zone (3), a plurality of heat treatment zones (4 to 6) and a material outlet zone (7), all the zones being arranged in succession in the longitudinal direction of the tensioning machine (1),
b) two tensioning chains (8, 9) which run continuously in the longitudinal direction of the tensioning machine through all the zones and are an oblique distance apart and on chain links (10) which are flexibly connected to one another bear holding elements (11) for gripping the two long edges of the lengths of material (2) to be treated,
c) chain guide rails (12, 13) to support and guide the advancing and returning strands of the two tensioning chains,
d) cooling air blowing arrangements (14, 15) which are associated with long sections of the chain guide rails at least in the region of the returning strand of the tensioning chain, characterised in that
e) the cooling air blowing arrangements (14, 15) which are only arranged approximately on the length of the long sections of the chain guide rails (12, 13) which run inside the heat treatment zones (4, 5, 6), are constructed in such a way that these long sections of the chain guide rails are each enclosed at least in their outer regions (e.g. 13a) constructed for the returning strands of the tensioning chain in a sheet metal channel (16, 17) serving as a cooling air guide channel, and these channels also extend in the transverse direction at least above the chain guide rails (12, 13) and thus have an open connection to the interior of the appertaining heat treatment zones so that used cooling air is introduced into the heat treatment zones through the inner regions (e.g. 13b) of the chain guide rails (12, 13) associated with the advancing strands of the tensioning chain (e.g. 9a).
2. Tensioning machine as claimed in claim 1, characterised in that each sheet metal channel (16, 17) is connected to at least one cooling air blower (18 to 21).
3. Tensioning machine as claimed in claim 2, characterised in that a cooling air pipe connection which is connected to the delivery side of a cooling air blower is built onto one end of each sheet metal channel.
4. Tensioning machine as claimed in claim 2, characterised in that a cooling air pipe connection (22) is fixed on both ends (16a, 16b, 17a, 17b) of each sheet metal channel (16, 17) and each cooling air pipe connection is connected to the delivery side of a separate cooling sir blower (18 to 21),
5. Tensioning machine as claimed in claim 2, characterised in that each cooling air blower takes in cold ambient air.
EP88103817A 1987-05-26 1988-03-10 Stretcher for thermal treatment of sheet-like materials in the width Expired - Lifetime EP0292657B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88103817T ATE53079T1 (en) 1987-05-26 1988-03-10 TENSIONING MACHINE FOR THE HEAT TREATMENT OF WIDE-FEED WEBS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873717774 DE3717774A1 (en) 1987-05-26 1987-05-26 TENSIONER FOR THE HEAT TREATMENT OF WIDTH-BASED PRODUCTS
DE3717774 1987-05-26

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EP0292657A2 EP0292657A2 (en) 1988-11-30
EP0292657A3 EP0292657A3 (en) 1989-02-22
EP0292657B1 true EP0292657B1 (en) 1990-05-23

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Publication number Priority date Publication date Assignee Title
DE3925737A1 (en) * 1989-08-03 1991-02-07 Brueckner Trockentechnik Gmbh Stenter chain - has sliding units on clip or needle carriers in at least two sliding planes
ES2096630T3 (en) * 1990-08-23 1997-03-16 Nippon Petrochemicals Co Ltd STRETCHING MACHINE.
DE59504261D1 (en) * 1995-01-31 1998-12-24 Mueller Kurt Method and device for drying and shrinking textile goods
AU719339B2 (en) * 1996-07-30 2000-05-04 Kurt Dr. Muller Process and apparatus for the drying and shrinking of textile goods
JP4191855B2 (en) * 1999-08-24 2008-12-03 新日本石油株式会社 Method for producing transversely stretched nonwoven fabric and transversely stretched apparatus
DE10152539B4 (en) * 2001-10-24 2005-06-09 Koenig & Bauer Ag guide rail
US6936209B2 (en) * 2002-11-27 2005-08-30 3M Innovative Properties Company Methods and devices for processing polymer films
US8899408B2 (en) 2012-08-03 2014-12-02 Applied Materials, Inc. Temperature actuated tensioning mechanism
JP6086995B2 (en) 2012-12-20 2017-03-01 ブリュックナー・マシーネンバウ・ゲーエムベーハー・ウント・コー・カーゲー Stretching equipment
DE102012025487A1 (en) * 2012-12-20 2014-06-26 Brückner Maschinenbau GmbH & Co. KG Transport system, in particular Querreckanlage

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GB971737A (en) * 1961-01-01 1964-10-07 Dornier Gmbh Lindauer Stretching frame with travelling clip chains for stretching organic thermoplastic films
DE1504507B2 (en) * 1963-11-26 1971-06-24 Lindauer Dormer GmbH, 8990 Lin dau DEVICE FOR CROSS-STRETCHING THERMOPLASTIC PLASTIC TRACKS
US3327367A (en) * 1964-12-15 1967-06-27 Artos Meier Windhorst Kg Apparatus for thermic treatment of textile materials
DE8306640U1 (en) * 1983-03-08 1983-07-14 Brückner Trockentechnik GmbH & Co KG, 7250 Leonberg TENSIONER
DE3526584A1 (en) * 1985-07-25 1987-02-05 Monforts Gmbh & Co A CLOTH TENSIONER

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EP0292657A3 (en) 1989-02-22
ATE53079T1 (en) 1990-06-15
DE3717774A1 (en) 1988-12-08
EP0292657A2 (en) 1988-11-30
DE3860171D1 (en) 1990-06-28
US4899427A (en) 1990-02-13

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