EP0295427A1 - Method and device for applying a surface pressure to work pieces driven by pressbelts - Google Patents
Method and device for applying a surface pressure to work pieces driven by pressbelts Download PDFInfo
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- EP0295427A1 EP0295427A1 EP88107536A EP88107536A EP0295427A1 EP 0295427 A1 EP0295427 A1 EP 0295427A1 EP 88107536 A EP88107536 A EP 88107536A EP 88107536 A EP88107536 A EP 88107536A EP 0295427 A1 EP0295427 A1 EP 0295427A1
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- pressure
- pressure medium
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- active zone
- fluid pressure
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- 238000000034 method Methods 0.000 title claims description 14
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
- B30B5/04—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band
- B30B5/06—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band
- B30B5/062—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of an endless band co-operating with another endless band urged by directly-acting fluid pressure
Definitions
- the present invention relates to a method and a device for applying surface pressure to workpieces operated by press belts, such as continuously moving material webs, also in the form of laminates or the like.
- the surface pressure is generated by the pressure of a gaseous or liquid pressure medium in a sealed active zone defined on one side by the press belt.
- You can limit the pressure chamber for example, by a circumferential, generally approximately quadrangular seal, and the pressure chamber itself is limited on the one hand by the circumferential press belt and on the back by a pressure plate, which is also a heating plate, so that the pressure medium in the Effective zone can also be heated, since usually the belt presses equipped with such pressure chambers, for example double belt presses, also require heating and / or cooling of the leading workpieces.
- fluid pressure media such as air or oil are particularly suitable in terms of handling, controllability and sensitivity of the setting.
- the problem remains that the in the effective zone between the back of the heating plate and the endless press belt pressure gas layer in the pressure chamber has an insulating effect on the heat transfer.
- Attempts have been made (DE-OS 24 21 296) to replace gaseous pressure media which are even more insulating with a liquid, in particular oil or liquid metals. While liquid metals have proven technically difficult to control for this purpose and in this area of application, the use of oil has not brought about any drastic improvement, since the thermal conductivity of oil only reaches a maximum of three times the thermal conductivity of air and, in addition, considerable pollution problems may occur.
- the present invention is therefore based on the object of demonstrating a method and an apparatus of the generic type in which the heat transfer in the effective zone between the pressure plate designed as a heating or cooling plate and the press belt is decisively improved.
- a temperature gradient occurs exclusively in the direction from the heat donor to the receiver.
- the pressure medium only acts as a mediator or as an intermediate layer with a very high heat transfer value due to the forced movement.
- the heat transfer can be regulated very simply and very sensitively via the speed of the forced movement of the medium as a controlled variable.
- the given operating pressure and the throughput speed of the workpieces are taken into account as parameters.
- the amount of heat transferred suddenly drops, since in this case the medium, when the forced movement ceases and any heating is switched off, acts as an insulation layer between the heating plate and the press belt in the effective zone. There is therefore only a very low inertia behavior and, in particular, no overrun of the heating energy transmission.
- the extent of the forced movement depends on the operating pressure and the extent of the desired heat transfer. In any case, it is expedient to move so violently that there is turbulent movement of the pressure medium. For gaseous media, there are movement speeds of 10 to 50 m / sec, preferably 20 to 40 m / sec. for liquid media those of 2 to 5 m / sec, preferably 4 to 5 m / sec. proven to be very useful. Expedient refinements of the subject matter of the invention, in particular also including constructive refinements of a corresponding device, are characterized in the subclaims. Embodiments are described below with reference to the accompanying drawings.
- an active zone 4 which in the exemplary embodiment shown is formed by a pressure chamber which is delimited on one side by the press belt 1 and on the opposite side by a pressure and heating plate 5 and also known circumferential special seals 6.
- the required surface pressure in a known manner by a z. B. gaseous, under the operating pressure pressure medium.
- the pressure chamber is connected in the usual way to a compressor (not shown), which also continuously compensates for any leakage losses.
- a heating device 7 is located in the pressure and heating plate.
- a forced movement device is now provided for the pressurized gaseous medium in the active zone.
- the pressure and heating plate 5 is dimensioned relatively large and a fan 8 is integrated in it, which is connected to the active zone 4 via an integrated pressure and suction line 9 and the pressurized gaseous pressure medium in the active chamber 4 violently forced, preferably like this strong that a turbulent flow occurs here, which leads to an extremely high heat transfer between the pressure and heating plate 5 and the press belt 1.
- the extent of the heat transfer can be regulated very sensitively both via the operating pressure and in particular via the flow rate.
- care is taken, for example, in a very simple manner for greater heating on a first section of the active zone 4, as seen in the direction of passage of the workpiece 3, that here the active zone 4 or the pressure chamber is protruding from a rear section Shoulder in the pressure and heating plate 5 has a narrowed cross-section, so that an increased flow rate occurs in this first work zone section 4a.
- a pressure and heating plate 5a is provided with basically the same device structure, which, depending on the length of the active zone 4, is assigned one or more, in the exemplary embodiment shown 2, forced movement devices in the form of fans 8a, the rotating blades 8b of which are flat blades are formed and extend at least partially into the active zone 4.
- FIG. 3 which also has the same basic structure, a front pressure and heating plate 5b is shown, in which for reasons of space, inlets and outlets 10 from the active zone 4 under the pressure and heating plate 5b are brought out.
- the fan 8 is switched on in the lines 10 and the compressor 11 is also connected, with which leakage losses can also be continuously supplemented.
- the operating pressure z. B. gaseous pressure medium is also directly heated in the active zone 4 and its violent forced movement in this active zone 4 also causes the extraordinary increase in heat transfer capacity.
- an effective zone 4a can be connected to the effective zone 4 by heating the press belt 1 and thus the workpiece 3, which zone basically has exactly the same structure, only the direction of heat transfer being reversed here, i.e. one Cooling zone is formed, in which the pressure and cooling plate 5c is provided with a cooling device 7a.
- the gaseous medium under pressure is forcefully moved in the active zone 4a for an extraordinary increase in the cooling capacity, for which purpose a fan 8 is again provided.
- a compressor 11 is also provided here.
- a rotary piston blower or a compressor can also be used as the forced movement device.
- the method according to the invention consists in that, in the sealed active zone 4, 4a, the surface pressure is generated by the pressure of a fluid pressure medium and the active zone 4, 4a is heated or cooled to apply a surface pressure and to transfer heat to the press belt-driven workpieces is and that in addition, the pressure medium under operating pressure is forced to move violently in the effective zone, the expedient movement being carried out so violently in an expedient embodiment that there is in the effective zone for the operating pressurized pressure medium result in turbulent flows.
- Flow velocities of approx. 20 to 40 m / sec for gaseous pressure media and 4 to 5 m / sec for liquid pressure media have proven to be very useful.
- the violent forced movement can only take place on site in the effective zone.
- a forced circulation in a closed circuit can also be provided, including the active zone.
- the degree of heat transfer can be sensitively regulated by changing the flow rate and / or the pressure of the pressure medium.
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Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren sowie eine Vorrichtung zum Aufbringen einer Flächenpressung auf preßbandbetriebene Werkstücke wie beispielsweise kontinuierlich bewegte Werkstoffbahnen, auch in Form von Laminaten oder dergleichen.The present invention relates to a method and a device for applying surface pressure to workpieces operated by press belts, such as continuously moving material webs, also in the form of laminates or the like.
Bei bekannten Verfahren und Vorrichtungen (DE-OS 24 21 296) wird in einer abgedichteten, an einer Seite von dem Preßband definierten Wirkzone die Flächenpressung durch den Druck eines gasförmigen oder flüssigen Druckmediums erzeugt. Man kann dabei beispielsweise die Druckkammer durch eine umlaufende, in der Regel etwa viereckig ausgebildete Dichtung begrenzen und die Druckkammer selbst wird dabei einerseits von dem umlaufenden Preßband und auf der Rückseite durch eine Druckplatte begrenzt, die gleichzeitig auch Heizplatte ist, so daß das Druckmedium in der Wirkzone auch beheizt werden kann, da meist die mit derartigen Druckkammern ausgestatteten Bandpressen, beispielsweise Doppelbandpressen, auch ein Erwärmen und/oder Kühlen der vorlaufenden Werkstücke erfordern.In known methods and devices (DE-OS 24 21 296), the surface pressure is generated by the pressure of a gaseous or liquid pressure medium in a sealed active zone defined on one side by the press belt. You can limit the pressure chamber, for example, by a circumferential, generally approximately quadrangular seal, and the pressure chamber itself is limited on the one hand by the circumferential press belt and on the back by a pressure plate, which is also a heating plate, so that the pressure medium in the Effective zone can also be heated, since usually the belt presses equipped with such pressure chambers, for example double belt presses, also require heating and / or cooling of the leading workpieces.
An sich sind fluide Druckmedien wie beispielsweise Luft oder Öl von der Handhabung, Beherrschbarkeit und Feinfühligkeit der Einstellung her besonders geeignet. Problemvoll bleibt, daß die in der Wirkzone zwischen der Heizplattenrückseite und dem endlosen Preßband befindliche Druckgasschicht in der Druckkammer bezüglich der Wärmeübertragung isolierend wirkt. Man hat versucht (DE-OS 24 21 296), noch stärker isolierende gasförmige Druckmedien durch ein flüssiges, insbesondere Öl oder flüssige Metalle zu ersetzen. Während sich flüssige Metalle als für diesen Einsatzzweck und in diesem Einsatzbereich technisch als kaum beherrschbar erwiesen haben, hat der Einsatz von Öl keine durchgreifende Verbesserung erbracht, da die Wärmeleitfähigkeit von Öl auch nur maximal den dreifachen Wert der Wärmeleitfähigkeit von Luft erreicht und darüber hinaus erhebliche Verschmutzungsprobleme auftreten können.As such, fluid pressure media such as air or oil are particularly suitable in terms of handling, controllability and sensitivity of the setting. The problem remains that the in the effective zone between the back of the heating plate and the endless press belt pressure gas layer in the pressure chamber has an insulating effect on the heat transfer. Attempts have been made (DE-OS 24 21 296) to replace gaseous pressure media which are even more insulating with a liquid, in particular oil or liquid metals. While liquid metals have proven technically difficult to control for this purpose and in this area of application, the use of oil has not brought about any drastic improvement, since the thermal conductivity of oil only reaches a maximum of three times the thermal conductivity of air and, in addition, considerable pollution problems may occur.
Es ist deshalb vorgeschlagen worden, zusätzlich mit Wärmebrücken zu arbeiten (DE-PS 33 25 578), um mittels Druckschuhen eine direkte Wärmeleitung von der Heizplatte auf das endlose Preßband zu gewährleisten. Diese die Wärmeleitung bewirkenden Druckschuhe haben jedoch erhebliche Nachteile. Abgesehen von dem sehr hohen Kraftbedarf zum Antreiben des Preßbandes entsteht an den Druckschuhen metallischer Abrieb, der das sichere Funktionieren der umlaufenden Dichtungen für die Druckkammer in Frage stellt.It has therefore been proposed to additionally work with thermal bridges (DE-PS 33 25 578) in order to ensure direct heat conduction from the heating plate to the endless press belt by means of pressure shoes. However, these pressure shoes which cause heat conduction have considerable disadvantages. In addition to the very high power required to drive the press belt, metallic abrasion occurs on the pressure shoes, which questions the safe functioning of the circumferential seals for the pressure chamber.
Es sind schließlich auch schon Systeme bekannt geworden, bei denen man nicht ein Druckmedium in der Wirkzone beheizt, sondern bei denen Dampf (US-PS 21 35 763) oder Heißwasser (DE-OS 19 53 816) der Wirkzone in einem Kreislauf zugeführt werden. Die Beheizung erfolgt außerhalb der Wirkzone und es wird mit den üblichen Zuführungsgeschwindigkeiten bzw. Ableitungsgeschwindigkeiten für Dampf und Heißwasser gearbeitet. Diese Systeme haben sich vor allen Dingen deshalb in der Praxis als unbrauchbar erwiesen, da sich naturgemäß das zugeführte heiße Druckmedium bei seiner Bewegung durch die Wirkzone abkühlt. Da derartige Wirkzonen relativ lang sind, ergibt sich vom Einlaß bis zum Auslaß ein nicht hinnehmbares Temperaturgefälle in Durchlaufrichtung der Werkstücke.Finally, systems have also become known in which one does not heat a pressure medium in the active zone, but in which steam (US Pat. No. 2,135,763) or hot water (DE-OS 19 53 816) are fed to the active zone in a circuit. The heating takes place outside the effective zone and the usual feed speeds or discharge speeds for steam and hot water are used. Above all, these systems have proven to be unusable in practice, since the hot pressure medium supplied naturally cools down as it moves through the active zone. Because such zones of action are relative are long, there is an unacceptable temperature gradient in the direction of flow of the workpieces from the inlet to the outlet.
Der vorliegenden Erfindung liegt von daher die Aufgabe zugrunde,ein Verfahren sowie eine Vorrichtung der gattungsgemäßen Art aufzuzeigen, bei dem bzw. der der Wärmeübergang in der Wirkzone zwischen der als Heiz-oder Kühlplatte ausgebildeten Druckplatte und dem Preßband entscheidend verbessert wird.The present invention is therefore based on the object of demonstrating a method and an apparatus of the generic type in which the heat transfer in the effective zone between the pressure plate designed as a heating or cooling plate and the press belt is decisively improved.
Die erfindungsgemäße Lösung ergibt sich bezüglich des Verfahrens aus dem kennzeichnenden Teil des Patentanspruches 1, bezüglich der Vorrichtung aus dem Hauptvorrichtungsanspruch.The solution according to the invention results with respect to the method from the characterizing part of patent claim 1, with respect to the device from the main device claim.
Es hat sich völlig überraschend gezeigt, daß durch die vergleichsweise heftige Zwangsbewegung des unter Druck stehenden fluiden Mediums in der Wirkzone sein Vermögen, Wärme auf das Preßband zu übertragen, außerordentlich gesteigert wird und zwar so stark, daß der Wärmeübergang besser ist als beispielsweise mit Hilfe der bekannten Druckschuhe. Durch die heftige Zwangsbewegung in der Wirkzone übernimmt das unter dem Betriebsdruck stehende fluide Medium nunmehr die Funktion eines Wärmeüberträgers von der die Wirkzone begrenzenden Heizplatte als Sender auf das Preßband, wobei hervorzuheben ist, daß sich auf genau die gleiche Weise im Falle des Erfordernisses der Kühlung auch eine außerordentlich verbesserte Kühlung einstellt. Die Wärmeflußrichtung verläuft lediglich umgekehr vom Preßband fort.It has been shown completely surprisingly that by the comparatively violent forced movement of the pressurized fluid medium in the effective zone, its ability to transfer heat to the press belt is increased to an extent that the heat transfer is better than, for example, with the help of known pressure shoes. Due to the violent forced movement in the effective zone, the fluid medium under the operating pressure now takes over the function of a heat exchanger from the heating plate delimiting the effective zone as a transmitter to the press belt, it being emphasized that in exactly the same way in the event of cooling being required sets an extraordinarily improved cooling. The direction of heat flow only runs in reverse from the press belt.
Bei diesem System, bei dem der Wärmespender und der Wärmeempfänger die Wirkzone begrenzen, stellt sich ein Temperaturgefälle ausschließlich in Richtung von Wärmespender zum Empfänger ein. Das Druckmedium wirkt nur als Vermittler oder wie eine Zwischenschicht mit nunmehr durch die Zwangsbewegung sehr hohem Wärmedurchgangswert.With this system, in which the heat donor and the heat receiver limit the effective zone, a temperature gradient occurs exclusively in the direction from the heat donor to the receiver. The pressure medium only acts as a mediator or as an intermediate layer with a very high heat transfer value due to the forced movement.
Es ist ferner hervorzuheben, daß die bei der heftigen Zwangsbewegung entstehenden Reibungsverluste vollständig in Wärme umgesetzt werden und von daher im Falle der Wärmeübertragung mit zur Aufheizung beitragen. In bestimmten Fällen kann zumindest zeitweilig sogar ganz der Wärmespender abgeschaltet werden.It should also be emphasized that the frictional losses resulting from the violent forced movement are completely converted into heat and therefore contribute to heating in the case of heat transfer. In certain cases, the heat donor can even be switched off completely, at least temporarily.
Es hat sich ferner herausgestellt, daß sich über die Geschwindigkeit der Zwangsbewegung des Mediums als Regelgröße die Wärmeübertragung sehr einfach und sehr feinfühlig regeln läßt. Dabei gehen der jeweils gegebene Betriebsdruck und die Durchlaufgeschwindigkeit der Werkstücke als Parameter mit ein. Hervorzuheben ist auch, daß bei Betriebsstörungen oder am Produktionsende die übertragene Wärmemenge nun schlagartig abfällt, da in diesem Fall durch Aufhören der Zwangsbewegung und Abschalten einer etwaigen Heizung das Medium im Stillstand als Isolationsschicht zwischen Heizplatte und Preßband in der Wirkzone wirkt. Es zeigt sich somit nur ein sehr geringes Trägheitsverhalten und insbesondere kein Nachlauf der Heizenergie-Übertragung.It has also been found that the heat transfer can be regulated very simply and very sensitively via the speed of the forced movement of the medium as a controlled variable. The given operating pressure and the throughput speed of the workpieces are taken into account as parameters. It should also be emphasized that in the event of malfunctions or at the end of production, the amount of heat transferred suddenly drops, since in this case the medium, when the forced movement ceases and any heating is switched off, acts as an insulation layer between the heating plate and the press belt in the effective zone. There is therefore only a very low inertia behavior and, in particular, no overrun of the heating energy transmission.
Das Ausmaß der Zwangsbewegung hängt vom Betriebsdruck und dem Ausmaß der gewünschten Wärmeübertragung ab. In jedem Fall wird zweckmäßig so heftig bewegt, daß sich eine turbulente Bewegung des Druckmediums ergibt. Für gasförmi q e Medien haben sich Bewegungsgeschwindigkeiten von 10 bis 50m/sec,vorzugsweise 20 bis 40 m/sec. für flüssige Medien solche von 2 bis 5 m/sec,vorzugsweise 4 bis 5 m/sec. als sehr zweckmäßig erwiesen.
Zweckmäßige Ausgestaltungen des Erfindungsgegenstandes insbesondere auch unter Einschluß konstruktiver Ausgestaltungen einer entsprechenden Vorrichtung sind in den Unteransprüchen gekennzeichnet. Ausführungsbeispiele werden nachstehend unter Bezugnahme auf die beigefügten Zeichnungen näher beschrieben.The extent of the forced movement depends on the operating pressure and the extent of the desired heat transfer. In any case, it is expedient to move so violently that there is turbulent movement of the pressure medium. For gaseous media, there are movement speeds of 10 to 50 m / sec, preferably 20 to 40 m / sec. for liquid media those of 2 to 5 m / sec, preferably 4 to 5 m / sec. proven to be very useful.
Expedient refinements of the subject matter of the invention, in particular also including constructive refinements of a corresponding device, are characterized in the subclaims. Embodiments are described below with reference to the accompanying drawings.
Es zeigen
Figuren 1 - 3 stark schematisierte Ausführungsbeispiele von Vorrichtungen gemäß der Erfindung.Show it
Figures 1 - 3 highly schematic embodiments of devices according to the invention.
Bei dem in Figur 1 dargestellten Ausführungsbeispiel einer Vorrichtung zum Aufbringen einer Flächenpressung sowie Wärme auf preßbandgetriebene Werkstücke ist ein umlaufendes Preßband 1, üblicherweise aus Stahl, gezeigt, das über Umlenkwalzen 2 läuft und Werkstücke 3 wie beispielsweise Werkstoffbahnen, auch in Form von Laminaten, kontinuierlich bewegt, und zwar an einer Wirkzone 4 entlang, die im dargestellten Ausführungsbeispiel von einer Druckkammer gebildet wird, die auf der einen seite von dem Preßband 1 begrenzt wird und auf der gegenüberliegenden Seite von einer Druck- und Heizplatte 5 sowie ferner bekannten umlaufenden Spezialdichtungen 6. In der Wirkzone 4 bzw. der Druckkammer wird die erforderliche Flächenpressung in bekannter Weise durch ein z. B. gasförmiges, unter dem Betriebsdruck stehendes Druckmedium erzeugt. Die Druckkammer steht dabei in der üblichen Weise mit einem Kompressor (nicht dargestellt) in Verbindung, der auch etwaige Leckverluste laufend ausgleicht. In der Druck- und Heizplatte befindet sich eine Heizeinrichtung 7. Zusätzlich ist nun eine Zwangsbewegungseinrichtung für das unter Druck stehende gasförmige Medium in der Wirkzone vorgesehen. Im dargestellten Ausführungsbeispiel ist hierzu die Druck- und Heizplatte 5 relativ groß bemessen und es ist in ihr ein Ventilator 8 integriert, der über eine integrierte Druck- und Saugleitung 9 mit der Wirkzone 4 in Verbindung steht und das unter Druck stehende gasförmige Druckmedium in der Wirkkammer 4 heftig zwangsbewegt, vorzugsweise so stark, daß hier eine turbulente Strömung eintritt, die zu einer außerordentlich hohen Wärmeübertragung zwischen der Druck- und Heizplatte 5 und dem Preßband 1 führt.In the embodiment of a device for applying a surface pressure and heat to workpieces driven by press belt, as shown in FIG , namely along an
Das Ausmaß der Wärmeübertragung läßt sich sowohl über den Betriebsdruck, wie insbesondere auch über die Strömungsgeschwindigkeit sehr feinfühlig regeln. Im Ausführungsbeispiel nach Figur 1 ist beispielsweise in denkbar einfacher Weise dadurch für eine stärkere Erwärmung auf einem ersten Abschnitt der Wirkzone 4, gesehen in Durchlaufrichtung des Werkstückes 3, Sorge getragen, daß hier gegenüber einem hinteren Abschnitt die Wirkzone 4 bzw. die Druckkammer durch eine vorspringende Schulter in der Druck- und Heizplatte 5 einen verengten Querschnitt hat, so daß sich in diesem ersten Werkzonenabschnitt 4a eine erhöhte Strömungsgeschwindigkeit einstellt.The extent of the heat transfer can be regulated very sensitively both via the operating pressure and in particular via the flow rate. In the exemplary embodiment according to FIG. 1, care is taken, for example, in a very simple manner for greater heating on a first section of the
Bei dem in Figur 2 dargestellten Ausführungsbeispiel ist bei grundsätzlich gleichen Vorrichtungsaufbau eine Druck- und Heizplatte 5a vorgesehen, der je nach Länge der Wirkzone 4 ein oder mehrere, im dargestellten Ausführungsbeispiel 2 Zwangsbewegungseinrichtungen in Form von Ventilatoren 8a zugeordnet sind, deren rotierende Flügel 8b als Flachflügel ausgebildet sind und sich zumindest teilweise in die Wirkzone 4 hinein erstrecken.In the exemplary embodiment shown in FIG. 2, a pressure and
Beide Ausführungsformen nach den Figuren 1 und 2 bestechen durch eine kompakte, Wärmeverluste sehr gering haltende und jegliche Anschlußprobleme vermeidende Bauweise.Both embodiments according to FIGS. 1 and 2 impress with a compact design which keeps heat losses very low and avoids any connection problems.
Bei dem in Figur 3 dargestellten, ebenfalls den gleichen grundsätzlichen Aufbau habenden Ausführungsbeispiel ist eine vordere Druck- und Heizplatte 5b gezeigt, bei der aus Raumgründen Zu- und Ableitungen 10 aus der Wirkzone 4 unter der Druck- und Heizplatte 5b herausgeführt sind. In den Leitungen 10 ist einmal wiederum der Ventilator 8 eingeschaltet sowie ferner auch der Kompressor 11 angeschlossen, mit dem zugleich auch Leckverluste laufend ergänzt werden können. Das unter Betriebsdruck stehende z. B. gasförmige Druckmedium wird auch hier in der Wirkzone 4 unmittelbar beheizt und seine heftige Zwangsbewegung in dieser Wirkzone 4 bedingt auch hier die außerordentliche Erhöhung des Wärmeübertragungsvermögens.In the embodiment shown in FIG. 3, which also has the same basic structure, a front pressure and
Im Ausführungsbeispiel nach Figur 3 ist ferner illustriert, daß sich an die Wirkzone 4 mit einer Erwärmung des Preßbandes 1 und damit des Werkstückes 3 eine Wirkzone 4a anschließen kann, die grundsätzlich genau den gleichen Aufbau hat, wobei lediglich hier die Wärmeübergangsrichtung umgekehrt ist, also eine Kühlzone gebildet ist, bei der die Druck- und Kühlplatte 5c mit einer Kühleinrichtung 7a versehen ist. In genau der gleichen Weise wird auch hier zur außerordentlichen Steigerung des Kühlvermögens das unter Druck stehende gasförmige Medium in der Wirkzone 4a heftig zwangsbewegt, wozu wiederum ein Ventilator 8 vorgesehen ist. Auch hier ist ein Kompressor 11 vorgesehen.Als Zwangsbewegungseinrichtung kann auch ein Drehkolbengebläse oder ein Verdichter verwendet werden.In the exemplary embodiment according to FIG. 3, it is also illustrated that an effective zone 4a can be connected to the
Wenn mit flüssigen Druckmedien gearbeitet wird,treten an die Stelle der Ventilatoren Pumpen. Das erfindungsgemäße Verfahren besteht darin, daß zum Aufbringen einer Flächenpressung und zur Übertragung von Wärme auf die preßbandgetriebenen Werkstücke wie bisher in der abgedichteten Wirkzone 4, 4a die Flächenpressung durch den Druck eines fluiden Druckmediums erzeugt wird und die Wirkzone 4, 4a beheizt bzw. auch gekühlt wird und daß zusätzlich das unter Betriebsdruck stehende Druckmedium in der Wirkzone heftig zwangsbewegt wird, wobei in zweckmäßiger Ausgestaltung die Zwangsbewegung so heftig durchgeführt wird, daß sich in der Wirkzone für das unter Betriebs druck stehende Druckmedium turbulente Strömungen ergeben. Strömungsgeschwindigkeiten von ca. 20 bis 40 m/sec für gasförmige Druckmedien und von 4 bis 5 m/sec für flüssige Druckmedien haben sich als sehr zweckmäßig erwiesen. Die heftige Zwangsbewegung kann vor Ort ausschließlich in der Wirkzone erfolgen. Es kann aber auch unter Einschluß der Wirkzone eine Zwangsumwälzung in einem geschlossenen Kreislauf vorgesehen sein.When working with liquid pressure media, pumps take the place of the fans. The method according to the invention consists in that, in the sealed
Das Ausmaß der Wärmeübertragung kann man durch Änderung der Strömungsgeschwindigkeit und/oder des Druckes des Druckmediums feinfühlig regeln.The degree of heat transfer can be sensitively regulated by changing the flow rate and / or the pressure of the pressure medium.
Zur Erzielung der erfinderischen Wirkung ist es nicht erforderlich das Druckmedium in einem geschlossenen Kreislauf zu führen; es kann auch im Bereich der die Druckkammer umlaufend begrenzen- den Dichtungen ein erhöhter Verlust an gasförmigem Druckmedium vorgesehen und des aus der Druckkammer abströmende Druckmedium durch Einspeisung einer entsprechenden Menge an Druckmedium laufend ersetzt werden.In order to achieve the inventive effect, it is not necessary to run the pressure medium in a closed circuit; an increased loss of gaseous pressure medium can also be provided in the area of the seals surrounding the pressure chamber, and the pressure medium flowing out of the pressure chamber can be continuously replaced by feeding in a corresponding amount of pressure medium.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88107536T ATE69579T1 (en) | 1987-06-15 | 1988-05-11 | METHOD AND DEVICE FOR APPLYING A SURFACE PRESSURE TO PRESS BELT DRIVEN WORKPIECES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3719976 | 1987-06-15 | ||
DE19873719976 DE3719976A1 (en) | 1987-06-15 | 1987-06-15 | METHOD AND DEVICE FOR APPLYING A SURFACE PRESS TO WORKPIECE DRIVEN BY PRESSURE BELTS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0295427A1 true EP0295427A1 (en) | 1988-12-21 |
EP0295427B1 EP0295427B1 (en) | 1991-11-21 |
Family
ID=6329757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88107536A Expired - Lifetime EP0295427B1 (en) | 1987-06-15 | 1988-05-11 | Method and device for applying a surface pressure to work pieces driven by pressbelts |
Country Status (13)
Country | Link |
---|---|
US (2) | US5558016A (en) |
EP (1) | EP0295427B1 (en) |
JP (2) | JPH0191998A (en) |
CN (1) | CN1015528B (en) |
AT (1) | ATE69579T1 (en) |
DE (2) | DE3719976A1 (en) |
ES (1) | ES2026599T3 (en) |
FI (1) | FI88894C (en) |
IN (1) | IN171921B (en) |
LV (1) | LV11139B (en) |
RU (1) | RU1828438C (en) |
UA (1) | UA9999A (en) |
ZA (1) | ZA884234B (en) |
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EP0394655A1 (en) * | 1989-04-25 | 1990-10-31 | Firma Theodor Hymmen | Method and device for heating the press band of a press |
EP0550782A1 (en) * | 1990-12-24 | 1993-07-14 | Kurt Held | Continuous double-band press |
WO1996032255A1 (en) * | 1995-04-10 | 1996-10-17 | Minnesota Mining And Manufacturing Company | Two-stage laminator apparatus |
US5592874A (en) * | 1993-09-14 | 1997-01-14 | Pcd Polymere Gesellschaft M.B.H. | Double belt press with hydrostatic belt support |
WO1997039882A1 (en) * | 1996-04-20 | 1997-10-30 | Theodor Hymmen | Double band press for producing and/or coating web-shaped or plate-shaped workpieces of all kinds |
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DE4041850A1 (en) * | 1990-12-24 | 1992-06-25 | Held Kurt | CONTINUOUSLY WORKING DOUBLE BAND PRESS |
DE4202920A1 (en) * | 1992-02-01 | 1993-08-05 | U S P Transfers Ind Farbuebert | METHOD AND DEVICE FOR THE CONTINUOUS LAMINATION OF FILM MATERIAL |
DE4209683C2 (en) * | 1992-03-25 | 1994-06-01 | Anger Electronic Gmbh | Process and device for continuous lamination of film material |
DE4335749A1 (en) * | 1993-10-20 | 1995-04-27 | Danubia Petrochem Deutschland | Double-belt press with hydrostatic belt support |
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DE102007028822A1 (en) | 2007-06-20 | 2008-12-24 | Theodor Hymmen Holding Gmbh | Method and device for decoratively coating a plate |
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DE102013112275B4 (en) | 2013-11-07 | 2019-12-12 | Hymmen GmbH Maschinen- und Anlagenbau | Method for producing a decorative laminate |
US10421305B2 (en) * | 2015-05-21 | 2019-09-24 | Chums, Inc. | Feed-through thermal pressing system and associated components |
JP7058852B1 (en) * | 2021-12-28 | 2022-04-25 | 株式会社Sgic | Double belt press |
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- 1988-05-11 EP EP88107536A patent/EP0295427B1/en not_active Expired - Lifetime
- 1988-05-11 ES ES198888107536T patent/ES2026599T3/en not_active Expired - Lifetime
- 1988-05-11 DE DE8888107536T patent/DE3866289D1/en not_active Expired - Lifetime
- 1988-05-25 IN IN357/MAS/88A patent/IN171921B/en unknown
- 1988-05-31 UA UA4355816A patent/UA9999A/en unknown
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- 1988-06-10 US US07/206,337 patent/US5558016A/en not_active Expired - Fee Related
- 1988-06-14 CN CN88103628A patent/CN1015528B/en not_active Expired
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0394655A1 (en) * | 1989-04-25 | 1990-10-31 | Firma Theodor Hymmen | Method and device for heating the press band of a press |
EP0550782A1 (en) * | 1990-12-24 | 1993-07-14 | Kurt Held | Continuous double-band press |
US5592874A (en) * | 1993-09-14 | 1997-01-14 | Pcd Polymere Gesellschaft M.B.H. | Double belt press with hydrostatic belt support |
WO1996032255A1 (en) * | 1995-04-10 | 1996-10-17 | Minnesota Mining And Manufacturing Company | Two-stage laminator apparatus |
WO1997039882A1 (en) * | 1996-04-20 | 1997-10-30 | Theodor Hymmen | Double band press for producing and/or coating web-shaped or plate-shaped workpieces of all kinds |
US6009803A (en) * | 1996-04-20 | 2000-01-04 | Firma Theodor Hymmen | Double band press for making and/or coating plate-shaped or web-shaped workpieces of all types |
Also Published As
Publication number | Publication date |
---|---|
DE3866289D1 (en) | 1992-01-02 |
DE3719976C2 (en) | 1989-10-19 |
JPH04113195U (en) | 1992-10-02 |
UA9999A (en) | 1996-09-30 |
ES2026599T3 (en) | 1992-05-01 |
FI882843A0 (en) | 1988-06-14 |
US5713271A (en) | 1998-02-03 |
LV11139A (en) | 1996-04-20 |
FI88894B (en) | 1993-04-15 |
ATE69579T1 (en) | 1991-12-15 |
IN171921B (en) | 1993-02-06 |
LV11139B (en) | 1996-08-20 |
RU1828438C (en) | 1993-07-15 |
US5558016A (en) | 1996-09-24 |
ZA884234B (en) | 1989-03-29 |
JPH0191998A (en) | 1989-04-11 |
FI882843A (en) | 1988-12-16 |
DE3719976A1 (en) | 1988-12-29 |
CN1015528B (en) | 1992-02-19 |
JP2500929Y2 (en) | 1996-06-12 |
EP0295427B1 (en) | 1991-11-21 |
FI88894C (en) | 1993-07-26 |
CN1030045A (en) | 1989-01-04 |
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