EP2236258A1 - Method for producing composite panels in a continuously operating press and continuously operating press - Google Patents
Method for producing composite panels in a continuously operating press and continuously operating press Download PDFInfo
- Publication number
- EP2236258A1 EP2236258A1 EP10003654A EP10003654A EP2236258A1 EP 2236258 A1 EP2236258 A1 EP 2236258A1 EP 10003654 A EP10003654 A EP 10003654A EP 10003654 A EP10003654 A EP 10003654A EP 2236258 A1 EP2236258 A1 EP 2236258A1
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- EP
- European Patent Office
- Prior art keywords
- inlet
- production
- einlaufheizplatte
- press
- heating plate
- Prior art date
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/24—Moulding or pressing characterised by using continuously acting presses having endless belts or chains moved within the compression zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/06—Platens or press rams
- B30B15/062—Press plates
- B30B15/064—Press plates with heating or cooling means
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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
Definitions
- the invention relates to a method for producing material plates in a continuously operating press according to the preamble of claim 1 and to a continuously operating press, in particular for carrying out the method, according to the preamble of claim 14.
- Chipboard and the production of material plates from, for example, medium-density fibers are now automated processes and have already been used in many countries for many years.
- Wood materials, production and processing by Hansgert Soiné, DRW-Verlag 1995, pages 17ff described, the compression of processed chips or fibers takes place either clock-bound or continuous.
- the production of a pressed material mat by means of spreading machines plays an outstanding role Quality of the produced press mat besides the quality of the raw materials is an important factor.
- the preparation of a pressed material mat is done in advance by scattering the treated material on a forming belt by means of spreaders, then followed by a control of the pressed material mat by means of a basis weight scale and / or a density control. Furthermore, magnetic separators and search coils as metal detectors, pre-compression for pre-compression, Bekladungsvorraumen the long sides of the pressed material mats and finally a special transfer belt that introduces the Pressgutmatte at a predefined location in the inlet wedge compressor of the continuously operating press in such production plants.
- the pressing force is transmitted by hydraulic actuators on the press and heating plates and further on steel belts, which are supported by a rolling element carpet (rolling rods) circumferentially arranged on the pressed material.
- a solution for the exact definition of the inlet profile is to arrange in the inlet area bendable Einlaufsammlungn by means of hydraulic actuating means can be adjusted and thus cause a more or less strong inlet gradient ( DE 34 13 397 ).
- An exemplary further development is to quickly clamp the pressed material mat in an inlet region between the steel strips and to effect a controlled ventilation or the like by means of bending in the longitudinal direction of the inlet plates.
- different adjusting devices are arranged above a press, preferably double acting, which introduce different bending moments into the inlet heating plate in the direction of production ( DE 198 24 723 C1 ).
- Extremely high feed speeds (up to 2 m / s) are generally used for thin-plate production below 4 mm final thickness and, if necessary, pre-compacted pressed material mats with a height of 10 to 100 mm are pressed.
- the pressed material mats in the inlet wedge compressor are compressed within a possible length of the inlet area of 4 m to almost the final thickness.
- Extremely fast compression can lead to blowouts or backflow of the material to be pressed in calender presses or in poorly adjusted inlet areas or inlet wedge compressors of any kind in continuous double belt presses. Blowers are created by the air flowing counter to the direction of production, especially when there is flow congestion of the air.
- the invention is based on the object of providing a method for compacting a pressed product mat in a continuously operating press, which is capable of allowing an optimized venting of the pressed product mat in the inlet region counter to the production direction and at the same time enables a simpler setting of the inlet region. At the same time one should continuously operating press to carry out the procedure to be created.
- the solution of this problem for the method is that during the passage through the inlet region at least in a section in the production direction the pressed material mat from a surface side with a transverse to the production direction substantially linear inlet heating plate or at least two transversely to the direction of production substantially linear hinge plates and of the opposite surface side with a bent at least in the region of the longitudinal center line in the direction of the pressed material mat transverse to the direction of production Einlaufsammlungplatte and / or is compressed.
- the features A) to C) can also be arranged in each case independently and alone to bend the Einlaufsammlungplatte.
- This clamping or entrapment is preferably carried out almost without pressure and should prevent escape in this area, the air currents on the surface side of the pressed material mat.
- the air currents are forced to avoid in the direction of the narrow sides and there occur to the environment of the pressed material mat.
- This advantageous embodiment of the vent is especially true for pressed material mats, which have a height of less than 75 mm, preferably less than 40 mm.
- the method is also particularly suitable for production speeds of over 1 m / s.
- the newly created continuous press for carrying out the method according to the invention, it is also possible to produce thick material plates of very high press material mats more than 75 mm in height, without having to accept a loss of quality compared with the previous production systems. Accordingly, the newly created continuously operating press can also be operated independently without the method according to the invention with success, having the characterizing features.
- the practice has been customary for more than a decade to adjust or bend the inlet plates or the hinge plates in the inlet region in the longitudinal direction or in the direction of production. This is to achieve optimum ventilation.
- the different pressure and compression parameters are in the foreground, for example in targeted steam injection techniques with relatively moist pressed material mats, different compression profiles for setting the cover layer densities compared to the middle layer density and much more.
- the present invention takes a different approach here, in that preferably only one inlet heating plate is bent transversely to the direction of production to form a bulge or transverse bending, or stationary bent and the opposite inlet heating plate is linearly transversely to the production direction, out of its inclination (also stationary), or active is held.
- This is not contradicted by the possibility of adjusting an inlet profile in the longitudinal direction by bending the inlet plates in the longitudinal direction for adjusting the height of the inlet gap, since a curvature in the longitudinal direction, for example, a curvy profile is set, but in the transverse direction a linear, parallel to the rolling rods, Line should be kept. It thus results in bent inlet plates no plane level.
- hinge plates are not usually designed to be bent transversely to the direction of production because of problems with the joint connection to the subsequent hinge or press plate (main press area).
- the present teaching is particularly applicable to this type of continuously operating presses, wherein the opposite inlet heating, usually arranged below, in the longitudinal direction may have a fixed inlet radius.
- such a Einlaufsammlungplatte is particularly suitable for bending transversely to the production direction.
- FIG. 1 schematically the overall structure of the continuously operating press 1 is shown, each having two endlessly circulating steel belts 2 and 3, which are guided around idler pulleys 10 in a basic structure.
- a Pressgutmatte 7 is introduced into the inlet region I / II, which in the prior art usually on a forming belt (not shown) by means of a spreader (not shown) scattered and possibly after a pre-compression by means of a pre-press (not shown) is compressed ,
- Einlaufterrorismplatten 16 are arranged at the top and bottom, which as already described for setting the usually mentioned inlet wedge compressor (wedge shape, basically means up and down not bent in the transverse direction but only set in the longitudinal direction or bent Einlaufsammlungplatten 16).
- the division of the inlet region into a first and second inlet region I, II is based on different applications of the prior art and a further embodiment FIG. 2 , But also should be documented that the transverse bending at the bottom or top, or the bulge of the Einlaufsammlungplatte 16 at the front end of the inlet region I, in the middle of the inlet region between the Inlet areas I and II or towards the end of the inlet area II can be realized. Other conceivable varieties are of course possible.
- the Einviersammlungplatten 16 and the pressing / heating plates 19 of the main pressing portion III are mounted in a press frame 35 and are set with usually arranged therein adjusting devices in their position and their orientation.
- the pressed material mat 7 cured by means of pressure and heat and output after a calibration area towards the end of the main pressing area III as a continuous plate strand and the further processing (distribution, cooling, stacking) supplied.
- FIG. 2 It is shown how with the help of a transfer belt 20 in the inlet region I, II the press belt mat 7 is transferred to the lower steel belt 3.
- the continuously operating press 1 For the passage of the circulating drums 10 circulating steel belts 2 and 3 by the continuously operating press 1 are between the Einlaufsammlungplatten 16, respectively the hinge plates 12, 13, in the inlet area and the press-heating plates 19 in the main press area III and the steel strips 2 and 3 Rolling bars 4 spaced by means of insertion gears 5 and parallel to each other in the inlet region and guided by the continuously operating press 1.
- FIG. 2 shows another variant of an inlet region I, II of a continuously operating press 1, in which the upper Einlaufsammlungplatte 16 by a two-stage Einlaufkeilverêtr with two hinge plates 12, 13, with joints arranged 8, 9, is replaced.
- the upper Einlaufsammlungplatte 16 by a two-stage Einlaufkeilverêtr with two hinge plates 12, 13, with joints arranged 8, 9, is replaced.
- Preference is given to the mat contact point 17 of the pressed material mat 7 with the upper steel strip 2 the upper rolling rods 4 with low pressure between the upper steel strip 2 and the first hinge plate 12 clamped in an insertion zone.
- the pressed material mat 7 passes through the first compression section I and is thereby slightly compacted or even clamped only flat.
- the lower Einlaufsammlungplatte 16 is bent or bulged with the central actuators 23 and there is a bulge 34, the partial or can be present over the entire width of the Einlaufsammlungplatte 16.
- the opposite inlet heating plate 16 (according to FIG. 1 ) or the inlet joint system (according to FIG. 2 ) remain linear (parallel to the rolling rods 4) set, the hinge plates 12, 13 preferably remain flat in their nature or can be readjusted and the Einlaufsammlungplatten 16 bent in their longitudinal extent to enhance the compression respectively to reduce the height of the inlet gap E accordingly be set and only transverse to the direction of production a linear adjustment parallel to the rolling rods 4.
- the reduction of the inlet gap E takes place with the joint plates 12, 13 thereby stepwise, so that in general results in sections planar surfaces in the direction of the rolling rods.
- the surface side 33 of the pressed material mat 7 lying in the direction of the curved or curved recess 34 is concavely deformed at least in parts transversely to the production direction 22 during the clamping and / or the compression. Accordingly, be on the opposite side the Pressgutmatte essentially flat hinge plates 12 and / or 13 used and / or the hinge plates 12 and / or 13 set substantially flat.
- the entrapment of the pressed material mat 7 is performed almost without pressure at least in parts of the inlet region I, II, which applies in particular to parts or the entire inlet region I.
- the inlet heating plate 16 is used bent substantially in the region of the mat contact point 17 and / or in the first inlet region I and / or in the second inlet region II transversely to the production direction or is correspondingly actively bent.
- a bulge 34 caused by the bending of the inlet heating plate 16, the pressed material mat 7 vents substantially in the direction of the narrow sides 30 of the pressed material mat 7.
- Particularly preferred is the application at a production speed in the production direction 22 of over 1.2 m / s and / or at a Pressgutmatten 7 a height h less than 35 mm.
- the bending of the Einlaufsammlungplatte 16 transversely to the production direction 22 at the latest after 0.3 to 2 m after bilateral contact of the Pressgutmatte 7 at the mat contact point 17 with the steel strips 2, 3 is realized.
- FIGS. 3 and 4 Possible bending profiles 32 of the lower Einlaufsammlungplatte 16 shown. With LML while the longitudinal center line is shown, which is actually in the production direction 22 in the plane of the Pressgutmatte 7 and this divides the middle in two halves.
- the inlet heating plate 16 is bent and retained on the edge sides with suitable retraction means 29. Accordingly, sketchy force arrows can be found below the inlet heating plate 16, which should represent this situation.
- the bending of the Einlaufsammlungplatte 16 may also be static or stationary, as will be shown later.
- at least one adjusting device 23 or a row 31 can bring about bending on adjusting devices 23 in the direction of production.
- the air flows show the venting of the press material mat 7, which has been introduced in an advantageous manner, by means of the initiated air flows 21 in the direction of the narrow sides 30.
- FIG. 3 represents a bending over the entire width of the Einlaufsammlungplatte 16 is in FIG. 4 only one bulge 34 shown.
- FIG. 4 represents a comparison of the inlet column E and E 'shown. With a pure entrapment of the pressed material mat 7 in the inlet gap E, densification already takes place in the regions of the inlet gap E '.
- FIG. 5 shows by way of example the arrangement of a bulge 34 or a bend in the inlet regions I and / or II.
- a Einlaufsammlungplatte 16 is used, which is at least at one point non-positively and / or positively fixed to at least a portion of the press frame 35.
- retaining means 14 are arranged on the edge sides of the inlet heating plate 16, which fix the inlet plate 16 at the edge of the pressure insulation 18 respectively the table plate 24 of the press frame 35.
- a base 36 is now introduced, which ensures a static bulging of the lower inlet heating plate 16.
- FIG. 7 also shows a section in the production direction with a front view of a press frame 35 with representation of possible actuators 23 for active support and / or transverse bending a lower Einlaufsammlungplatte 16 transverse to the production direction 22.
- a press frame 35 in a simplified representation can from a closed window frame plate (not shown) or from a composite window frame, which consists of a top-mounted ram plate 6, a bottom arranged table plate 24 and this connecting pull tabs 25.
- actuators 26 and 27 are arranged, which are designed here as a single-acting hydraulic cylinder and are arranged opposite to each other in the load flow.
- the inlet heating plates 16 together and over the Actuators 27 are moved apart.
- the lower inlet heating plate 16 is arranged at the edge on a stop 28 and is fixed to the table plate 24 by means of the retraction means 29.
- the retraction means 29 can be permanently adjustable tie rods or active adjustable adjusting devices.
- FIG. 8 a partial perspective view of a lower part of the press frame 35, a plurality of table sheets 24 showing the pressure insulation 18 and a possible arrangement of the actuators 23 in rows 31 and 31 'shown below a lower Einlaufsammlungplatte 16.
- a preferred bending profile 32 after FIG. 5 now at least one hydraulic actuator 23 is activated in series 31 and bends the Einlaufsammlungplatte 16 in the region of the longitudinal center line LML in the direction of the overhead second Einlaufsammlungplatte.
- this setting of the inlet heating plate 16 below is sufficient to establish or optimize an air flow 21 in the direction of the narrow sides 30 of the pressed material mat 7 during the compression in the inlet region.
- a plurality of adjusting devices 23 are successively activated in a row 31 in order to set a bending profile 32 as uniformly as possible or steadily increasing in the production direction.
- the rows 31 ' can be supporting, or as after FIG. 4 contribute no part to the bending profile 32, resulting in a lower curvature of the entire Einlaufsammlungplatte 6 across the width, but possibly to a strong curvature of the Inlet heating plate leads in the direction of the longitudinal center line.
- the retraction means 29 ensure during an activation of the actuators 23 in the row 31, optionally with a support by the actuators 23 in the rows 31 'an optimal investment of the outer sides of the Einlaufsammlungplatte 16 at the stops 28th
- An inlet heating plate can also be mounted floating on a plurality of hydraulic adjusting devices 23.
- hydraulic adjusting devices 23 are arranged with a larger maximum stroke than in the row 31 '.
- FIG. 9 is to illustrate this possibility, the Einlaufsammlungplatte 16 during idle, or idle, the continuous working press 1 and the Einlaufsammlungplatte 16 is lowered and the pistons of the actuators 23 are located at bottom dead center.
- FIG. 10 is the continuous press in the manufacturing plant for material plates and the two outer piston series 31 ', are at top dead center and have raised the Einlaufsammlungplatte 16 in the operating position.
- the actuator 23 of the row 31 is not yet reached the top dead center, since this actuator 23 of the row 31 with respect to the other actuators 23 of the rows 31 'has an extended stroke.
- the current hub can move away and / or pressure adjustment is performed and ensures a normal setting of the inlet heating 16. If now desired for the inventive method buckling, after FIG. 11 the central actuator 23 of the row 31 is acted upon by the necessary pressure, so that the piston reaches top dead center. At the same time the Einlaufsammlungplatte 16 is bent.
- the rows 31, 31 ' may not be limited. On the one hand, additional rows 31 'across the width of the continuously operating press 1 are conceivable; on the other hand, a plurality of adjusting devices 23 need not necessarily be activated for bending or bulging 34, but only one in a row may suffice for the necessary result to reach.
- the continuous press can be used alone, but is also particularly suitable for carrying out the method.
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- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Werkstoffplatten in einer kontinuierlich arbeitende Presse nach dem Oberbegriff des Patentanspruches 1 und auf eine kontinuierlich arbeitende Presse, insbesondere zur Durchführung des Verfahrens, nach dem Oberbegriff des Patentanspruches 14.The invention relates to a method for producing material plates in a continuously operating press according to the preamble of claim 1 and to a continuously operating press, in particular for carrying out the method, according to the preamble of
Spanplatten und die Herstellung von Werkstoffplatten aus zum Beispiel mitteldichten Fasern sind mittlerweile automatisierte Prozesse und werden bereits in vielen Ländern seit Jahren angewandt. Wie in "
Die Herstellung einer Pressgutmatte geschieht im Vorfeld durch Streuung des behandelten Materials auf ein Formband mittels Streumaschinen, danach folgen eine Kontrolle der Pressgutmatte mittels einer Flächengewichtswaage und/oder eine Dichtekontrolle. Weiter sind in derartigen Produktionsanlagen Magnetabscheider und Suchspulen als Metalldetektoren, Vorpressen zur Vorverdichtung, Besäumungsvorrichtungen der Längsseiten der Pressgutmatten und schließlich ein spezielles Übergabeband, das die Pressgutmatte an vordefinierter Stelle in den Einlaufkeilverdichter der kontinuierlich arbeitenden Presse einführt, üblich. Bei diesen Pressen, wie in
Es hat sich in den letzten Jahren der technologischen Entwicklung herauskristallisiert, dass eine kritische Komponente einer kontinuierlich arbeitenden Presse der Einlaufbereich darstellt. Es haben sich zwei grundsätzlich unterschiedliche Lösungen herauskristallisiert. Eine Lösung zur genauen Definition des Einlaufprofils besteht darin im Einlaufbereich verbiegbare Einlaufheizplatten anzuordnen, die mittels hydraulischer Stellmittel verstellt werden können und damit einen mehr oder weniger starken Einlaufgradienten bewirken können (
Einen anderen Weg hat eine parallele Entwicklung des Einlaufbereiches beschritten. In
Another way has been a parallel development of the inlet area. In
Üblicherweise werden nun verschiedene Verdichtungsstrategien im Einlauf von kontinuierlich arbeitenden Pressen verwendet, wobei vorzugsweise entweder eine langsame lineare Verdichtung ab Pressgutmattenkontakt bis zur Enddicke der Werkstoffplatte oder eine schnelle Verdichtung nach Pressgutmattenkontakt bis nahezu zur Enddicke durchgeführt wird. Abhängig sind diese Strategien direkt von der Höhe der einlaufenden Pressgutmatte, deren Beschaffenheit und deren Produktionsgeschwindigkeit (Vorschub). Grundsätzlich lässt sich feststellen, dass hohe Pressgutmatten für die Herstellung von dicken Werkstoffplatten (mehr als 16 mm) mit einer geringen Produktionsgeschwindigkeit (in der Regel kleiner 750 mm/s) durch eine kontinuierlich arbeitende Presse gefahren werden. Dünnere Werkstoffplatten unter 16 mm bedingen eine kurze Verweilzeit in der kontinuierlich arbeitenden Presse unter Druck und Hitze und somit eine höhere Produktionsgeschwindigkeit. Bei einer Dünnplattenproduktion unter 4 mm Enddicke werden in der Regel extrem hohe Vorschubgeschwindigkeiten (bis 2 m/s) gefahren und ggf. vorverdichtete Pressgutmatten mit einer Höhe von 10 bis 100 mm verpresst. Dabei werden die Pressgutmatten im Einlaufkeilverdichter innerhalb einer möglichen Länge des Einlaufbereichs von 4 m bis nahezu an die Enddicke verdichtet. Eine extrem schnelle Verdichtung kann bei Kalanderpressen oder bei schlecht eingestellten Einlaufbereichen respektive Einlaufkeilverdichtern jeglicher Art in kontinuierlichen Doppelbandpressen zu Ausbläsern oder Rückstauungen des Pressgutes führen. Ausbläser entstehen durch die entgegen der Produktionsrichtung strömende Luft, besonders wenn es zu Strömungsstauungen der Luft kommt. Die Folge sind Pressgutmattendopplungen oder -überstülpungen durch explosionsähnliche Ausbläser an den Deckschichten, die mit ihrer überhöhten Dichte zu lokalen Schäden (Einprägungen) am Stahlband führen können. Die Folge ist eine immer wiederkehrende schlechte Oberflächenqualität des Endproduktes durch diese Fehlerstelle im Stahlband, die umständlich repariert werden müssen oder nach einer Vielzahl von Fehlerstellen im Stahlband zu einem Austausch des Stahlbands führen.Usually, different compression strategies are now used in the inlet of continuously operating presses, wherein preferably either a slow linear compression from Pressgutmattenkontakt is carried out to the final thickness of the material plate or rapid compression after Pressgutmattenkontakt to almost the final thickness. These strategies are directly dependent on the height of the incoming pressed material mat, its condition and its production speed (feed). In principle, it can be stated that high pressed material mats for the production of thick material plates (more than 16 mm) are driven at a low production speed (generally less than 750 mm / s) through a continuously operating press. Thinner material plates under 16 mm require a short residence time in the continuous working Press under pressure and heat and thus a higher production speed. Extremely high feed speeds (up to 2 m / s) are generally used for thin-plate production below 4 mm final thickness and, if necessary, pre-compacted pressed material mats with a height of 10 to 100 mm are pressed. The pressed material mats in the inlet wedge compressor are compressed within a possible length of the inlet area of 4 m to almost the final thickness. Extremely fast compression can lead to blowouts or backflow of the material to be pressed in calender presses or in poorly adjusted inlet areas or inlet wedge compressors of any kind in continuous double belt presses. Blowers are created by the air flowing counter to the direction of production, especially when there is flow congestion of the air. The result is Pressgutmattendopplungen or protuberances by explosive blowers on the outer layers, which can lead to local damage (imprints) on the steel strip with their excessive density. The result is a recurring poor surface quality of the final product through this fault in the steel strip, which must be repaired cumbersome or lead after a variety of flaws in the steel strip to a replacement of the steel strip.
Die Erfahrung hat gezeigt, dass die Einlaufkeilverdichter und bisherige Verdichtungs- bzw. Herstellungsverfahren nach dem oben beschriebenen Stand der Technik bei der Herstellung von MDF- oder Spanplatten im dicken und dünnen Produktionsbereich nur bedingt geeignet sind eine optimale Entlüftung zu erreichen. Dies ist bedingt durch die überaus hohe Menge an eingeschlossener Luft in der Pressgutmatte, die nur begrenzt durch Vorpressen bereits entlüftet werden können, da die Pressgutmatte nach einer Vorpresse zum auffedern neigt. Erschwerend kommt hinzu, dass grundsätzlich bei der Werkstoffplattenherstellung durch geringe Ausblasungen in der Deckschicht Staubverwirbelungen vor dem Mattenkontaktpunkt auftreten, die zur Schlierenbildung der Oberfläche führen können. Wird eine möglichst hohe Produktionsgeschwindigkeit gewählt, bei der größere Ausbläser erfahrungsgemäß gar nicht oder nur sehr selten auftreten, kann es durch die an den große Oberflächenseiten austretende Luftströmungen zu partiellen hohen Strömungsgeschwindigkeiten kommen, die eine Verschiebung von kleineren Deckschichtbereichen ergeben und sich als Mikrorisse in der Deckschicht bemerkbar machen. Auch hier entsteht neben der Keilwirkung von Mikrorissen das Problem einer schlechten Oberflächenqualität, insbesondere bei der Dünnplattenherstellung.Experience has shown that the inlet wedge compressors and previous compression or manufacturing processes according to the above-described prior art in the production of MDF or chipboard in the thick and thin production area are only partially suitable to achieve optimal ventilation. This is due to the very high amount of trapped air in the pressed material mat, which can be vented only limited by pre-pressing, since the pressed material mat tends to spring up after a pre-press. To make matters worse, that in principle in the material plate production by low blowouts in the top layer dust swirling occur before the mat contact point, which can lead to streaking of the surface. If the highest possible production speed is selected, in which larger blow-out blowers do not occur at all or occur only very rarely, the high flow velocities emerging on the large surface sides can lead to partially high flow velocities, which result in a shift of smaller cover layer areas and appear as microcracks in the cover layer to make noticable. Again, in addition to the wedge effect of microcracks, the problem of poor surface quality, especially in the manufacture of thin plates.
Der Erfindung liegt nun die Aufgabe zugrunde ein Verfahren zur Verdichtung einer Pressgutmatte in einer kontinuierlich arbeitenden Presse zu schaffen, das in der Lage ist eine optimierte Entlüftung der Pressgutmatte im Einlaufbereich entgegen der Produktionsrichtung zu ermöglichen und gleichzeitig eine einfachere Einstellung des Einlaufbereiches ermöglicht. Gleichzeitig soll eine kontinuierlich arbeitende Presse zur Durchführung des Verfahrens geschaffen werden.The invention is based on the object of providing a method for compacting a pressed product mat in a continuously operating press, which is capable of allowing an optimized venting of the pressed product mat in the inlet region counter to the production direction and at the same time enables a simpler setting of the inlet region. At the same time one should continuously operating press to carry out the procedure to be created.
Die Lösung dieser Aufgabe für das Verfahren besteht darin, dass während des Durchlaufes durch den Einlaufbereich zumindest in einem Abschnitt in Produktionsrichtung die Pressgutmatte von einer Oberflächenseite mit einer quer zur Produktionsrichtung im Wesentlichen linearen Einlaufheizplatte oder zumindest mit zwei quer zur Produktionsrichtung im Wesentlichen linearen Gelenkplatten und von der gegenüberliegenden Oberflächenseite mit einer zumindest im Bereich der Längsmittenlinie in Richtung der Pressgutmatte quer zur Produktionsrichtung gebogenen Einlaufheizplatte eingeklemmt und/oder verdichtet wird.The solution of this problem for the method is that during the passage through the inlet region at least in a section in the production direction the pressed material mat from a surface side with a transverse to the production direction substantially linear inlet heating plate or at least two transversely to the direction of production substantially linear hinge plates and of the opposite surface side with a bent at least in the region of the longitudinal center line in the direction of the pressed material mat transverse to the direction of production Einlaufheizplatte and / or is compressed.
Die Lösung der gestellten Aufgabe für eine kontinuierlich arbeitende Presse zur Durchführung des Verfahrens besteht darin, dass eine Einlaufheizplatte im Einlaufbereich angeordnet ist,
- A) die für eine Verbiegung und/oder Aufwölbung zumindest an einer Stelle kraft- und/oder formschlüssig an zumindest einem Teil des Pressengestells fixiert und durch eine entsprechende Unterlage statisch verbogen angeordnet ist und/oder
- B) für die für die Lagerung mehrere hydraulische Stellvorrichtungen angeordnet sind und für die zur mindestens anteiligen Verbiegung und/oder Aufwölbung der Einlaufheizplatte zumindest Teile einer Reihe Stellvorrichtungen in Produktionsrichtung mit einem größere einstellbaren Hubweg und/oder einem größeren einstellbaren Druck gegenüber den anderen Stellvorrichtungen der Reihe angeordnet sind und wobei für den Rückzug der Einlaufheizplatte in Richtung Pressengestellt Rückzugsmittel mit Anschlägen zwischen einem Teil des Pressengestells und der Einlaufheizplatte angeordnet sind und/oder
- C) für die für eine schwimmende Lagerung mehrere hydraulische Stellvorrichtungen angeordnet sind und für die zur mindestens anteiligen Verbiegung und/oder Aufwölbung zumindest in einem Teil einer Reihe der Stellvorrichtungen in Produktionsrichtung hydraulische Stellvorrichtungen mit einem größeren maximalen Hubweg angeordnet sind als in der benachbarten Reihe.
- A) fixed for bending and / or buckling at least at one point non-positively and / or positively on at least part of the press frame and is arranged statically bent by a corresponding pad and / or
- B) for the storage for a plurality of hydraulic adjusting devices are arranged and for the at least proportional bending and / or buckling of the Einlaufheizplatte at least parts of a row Actuators are arranged in the direction of production with a larger adjustable stroke and / or a greater adjustable pressure compared to the other actuators of the series and wherein arranged for the withdrawal of the Einlaufheizplatte in the direction Pressed retraction means with stops between a part of the press frame and the Einlaufheizplatte and / or
- C) for which a plurality of hydraulic adjusting devices are arranged for a floating storage and for the at least proportional bending and / or buckling at least in a part of a row of adjusting devices in the direction of production hydraulic adjusting devices are arranged with a larger maximum stroke than in the adjacent row.
Neben einer Kombination aller drei verschiedenen Anlagenmerkmale, können die Merkmale A) bis C) auch jeweils eigenständig und allein stehend zur Verbiegung der Einlaufheizplatte angeordnet sein.In addition to a combination of all three different system features, the features A) to C) can also be arranged in each case independently and alone to bend the Einlaufheizplatte.
Mit der erfindungsgemäßen Lösung für das Verfahren und für die kontinuierlich arbeitende Presse, die im Übrigen auch losgelöst von dem Verfahren eigenständig nach der Lehre betrieben werden kann, ergeben sich folgende Vorteile bei der Herstellung von Werkstoffplatten aus Pressgutmatten durch eine saubere und kontinuierliche Zwangsentlüftung. Dazu wird vorzugsweise in der Längserstreckung (in Produktionsrichtung) in der Mitte der Pressgutmatte eine Einlaufheizplatte gezielt so verbogen, dass gegenüber den Schmalseiten der Pressgutmatte in der Mitte eine höhere bzw. schnellere Verdichtung erzielt wird. Durch diesen kurzen oder wenn nötig auch länger einwirkende stärkere Verdichtung in der Mitte der Pressgutmatte gegenüber den Randbereichen, erhält die Luft einen vektoriellen Impuls, der einen Winkelbereich von entgegen der Produktionsrichtung bis quer zur Produktionsrichtung überstreicht kann, der im Wesentlichen in der Ebene der Pressgutmatte liegt. Bei dicken bzw. hohen Pressgutmatten gereicht dieser Effekt zum Vorteil, besonders ist dabei aber hervorzuheben, dass diese Art der kontrollierten Entlüftung im Einlaufbereich bei Pressgutmatten durchgeführt werden kann, die nicht oder nur geringen Gegendruck gegenüber den Einlaufheizplatten entwickeln, oder für eine optimale Entlüftung im Anfangsbereich des Einlaufkeilverdichters lediglich eingespannt bzw. eingeklemmt werden. Diese Einspannung bzw. Einklemmung geschieht vorzugsweise nahezu drucklos und soll verhindern, dass in diesem Bereich die Luftströmungen an der Oberflächenseite der Pressgutmatte austreten. Damit werden die Luftströmungen gezwungen in Richtung der Schmalseiten auszuweichen und treten dort an die Umgebung aus der Pressgutmatte. Diese vorteilhafte Ausgestaltung der Entlüftung gilt besonders bei Pressgutmatten, die eine Höhe unter 75 mm, bevorzugt unter 40 mm aufweisen. Besonders geeignet ist das Verfahren auch bei Produktionsgeschwindigkeit von über 1 m/s.With the solution according to the invention for the process and for the continuously operating press, which can also be operated separately from the method independently according to the teaching, the following advantages in the production of material plates from Pressgutmatten by a clean and continuous forced ventilation. For this purpose, preferably in the longitudinal direction (in the production direction) in the middle of the pressed material mat a Einlaufheizplatte deliberately bent so that compared to the narrow sides of the Pressgutmatte in the middle of a higher or faster compression is achieved. As a result of this short or, if necessary, also longer acting stronger compression in the middle of the pressed material mat opposite the edge regions, the air receives a vectorial impulse which can cover an angular range from opposite to the production direction up to the production direction, which lies substantially in the plane of the pressed material mat , For thick or high Pressgutmatten this effect to advantage, but it should be emphasized that this type of controlled venting can be performed in the inlet area in pressed material mats that develop little or no backpressure against the Einlaufheizplatten, or for optimal ventilation in the beginning of the inlet wedge compressor are merely clamped or clamped. This clamping or entrapment is preferably carried out almost without pressure and should prevent escape in this area, the air currents on the surface side of the pressed material mat. Thus, the air currents are forced to avoid in the direction of the narrow sides and there occur to the environment of the pressed material mat. This advantageous embodiment of the vent is especially true for pressed material mats, which have a height of less than 75 mm, preferably less than 40 mm. The method is also particularly suitable for production speeds of over 1 m / s.
Es ergeben sich schließlich folgende Vorteile gegenüber dem Stand der Technik:
- a) es wird eine schonende und optimierte Entlüftung in der ersten Verdichtungszone über die Schmalflächen der Pressgutmatte erreicht,
- b) Ausbläser in den oberen Deckschichten der Pressgutmatte werden vermieden,
- c) Staubverwirbelungen über den Deckschichten der Pressgutmatte direkt vor dem Mattenkontaktpunkt treten nicht auf, somit ergibt sich eine optimale und gleichmäßige Oberflächenstruktur und -färbung,
- d) der Bereich oberhalb der Pressgutmatte kurz vor dem Mattenkontaktpunkt kann mittels einfacher Lichtschranken auf Ausbläser oder Pressgutmattenüberhöhungen überprüft werden, was normalerweise wegen der Staubverwirbelungen durch ausströmende Luft vor dem Mattenkontaktpunkt nicht möglich wäre und
- e) die Brandgefahr durch Staubaufwirbelungen ist im Einlauf erheblich reduziert.
- a) a gentle and optimized venting is achieved in the first compression zone over the narrow surfaces of the pressed material mat,
- b) Blowers in the upper cover layers of the pressed material mat are avoided
- c) dust swirling over the cover layers of the pressed material mat directly in front of the mat contact point does not occur, thus resulting in an optimal and uniform surface structure and coloration,
- d) the area above the Pressgutmatte just before the mat contact point can be checked by means of simple photoelectric sensors on Ausbläser or Pressgutmattenüberhöhungen, which would normally not possible due to the dust turbulence due to escaping air in front of the mat contact point and
- e) the risk of fire due to the raising of dust is considerably reduced in the inlet.
Gleichzeitig können in der neu geschaffenen kontinuierlich arbeitenden Presse zur Durchführung des erfindungsgemäßen Verfahrens weiterhin auch dicke Werkstoffplatten aus sehr hohen Pressgutmatten über 75 mm Höhe gefertigt werden, ohne einen Qualitätsverlust gegenüber den bisherigen Herstellungsanlagen hinnehmen zu müssen. Dementsprechend gilt, dass die neu geschaffene kontinuierlich arbeitende Presse auch eigenständig ohne das erfindungsgemäße Verfahren mit Erfolg betrieben werden kann, wobei sie die kennzeichnenden Merkmale aufweist.At the same time, in the newly created continuous press for carrying out the method according to the invention, it is also possible to produce thick material plates of very high press material mats more than 75 mm in height, without having to accept a loss of quality compared with the previous production systems. Accordingly, the newly created continuously operating press can also be operated independently without the method according to the invention with success, having the characterizing features.
Hinsichtlich der Pressentechnik ist seit mehr als einem Jahrzehnt die Praxis üblich die Einlaufplatten oder die Gelenkplatten im Einlaufbereich in Längsrichtung respektive in Produktionsrichtung zu verstellen oder zu verbiegen. Damit soll eine optimale Entlüftung erreicht werden. Nebenbei steht bei den vielen verschiedenen Verfahren auch die unterschiedlichen Druck- und Verdichtungsparameter im Vordergrund, beispielsweise bei gezielten Dampfstoßtechniken mit relativ feuchte Pressgutmatten, unterschiedlichen Verdichtungsprofilen zur Einstellung der Deckschichtdichten gegenüber der Mittelschichtdichte und vieles mehr.With regard to the press technology, the practice has been customary for more than a decade to adjust or bend the inlet plates or the hinge plates in the inlet region in the longitudinal direction or in the direction of production. This is to achieve optimum ventilation. Incidentally, in the many different methods, the different pressure and compression parameters are in the foreground, for example in targeted steam injection techniques with relatively moist pressed material mats, different compression profiles for setting the cover layer densities compared to the middle layer density and much more.
Es hat sich gezeigt, dass die bekannte Lehre aus dem Stand der Technik hinsichtlich der Verbiegung der Einlaufplatten bzw. der Gelenkplatten sich auf Stichwörter wie "keilförmiger", "trompetenförmiger" oder "konusförmiger" Einlaufbereich beschränkt. Die Lehre hinter den zuletzt genannten Begriffen und dem Stand der Technik bestand darin, die Schmalseiten der Pressgutmatte stärker zu verdichten um Ausbläser aus den Schmalseiten zu vermeiden, die aber wiederum verstärkt zu Ausbläsern an den Oberflächenseiten durch die entgegen der Produktionsrichtung durchzuführenden Entlüftung mit den beschriebenen Gefahren für die Stahlbänder gemündet haben. Bei derartigen Einlaufprofilen werden die Einlauf- bzw. die Gelenkplatten überwiegend in Längs- und Querrichtung verbogen. Nachteilig ist hier besonders die Multiaxialverbiegung von doch recht starren Metallplatten, die weder leicht zu handhaben ist, noch leicht ausführbar ist.It has been found that the known prior art teaching on the bending of the inlet plates or hinge plates is limited to keywords such as "wedge-shaped", "trumpet-shaped" or "cone-shaped" inlet region. The teaching behind the last-mentioned terms and the prior art consisted of compressing the narrow sides of the pressed material mat stronger in order to avoid blowouts from the narrow sides, which in turn reinforced blowers on the surface sides by venting with the dangers described opposite to the direction of production for the steel bands. In such inlet profiles, the inlet and the hinge plates are bent mainly in the longitudinal and transverse directions. The disadvantage here is especially the Multiaxialverbiegung of quite rigid metal plates, which is neither easy to handle, is still easy to carry out.
Die vorliegende Erfindung geht hier einen anderen Weg, indem vorzugsweise nur eine Einlaufheizplatte zur Bildung einer Aufwölbung oder Querverbiegung quer zur Produktionsrichtung verbogen wird oder stationär verbogen eingerichtet wird und die gegenüberliegende Einlaufheizplatte quer zur Produktionsrichtung linear, aus ihrer Neigung heraus (ebenfalls stationär), oder aktiv gehalten wird. Dem widerspricht nicht die Möglichkeit ein Einlaufprofil in Längsrichtung einzustellen, indem die Einlaufplatten in Längsrichtung zur Einstellung der Höhe des Einlaufspaltes verbogen werden, da bei einer Verbiegung in Längsrichtung zwar ein beispielsweise kurviges Profil eingestellt wird, in Querrichtung aber eine lineare, zu den Rollstangen parallele, Linie gehalten werden soll. Es ergibt sich somit bei verbogenen Einlaufplatten keine plane Ebene. Im Gegensatz hierzu sind Gelenkplatten in ihrer Natur üblicherweise nicht dafür ausgelegt quer zur Produktionsrichtung verbogen zu werden, da sich möglicherweise Probleme an der Gelenkanbindung zur nachfolgenden Gelenk- oder Pressenplatte (Hauptpressbereich) einstellen. Aus diesem Grund ist die vorliegende Lehre insbesondere bei dieser Gattung der kontinuierlich arbeitenden Pressen anzuwenden, wobei die gegenüberliegende Einlaufheizplatte, meist unten angeordnet, in Längsrichtung einen festen Einlaufradius aufweisen kann. Insbesondere eine derartige Einlaufheizplatte ist für eine Verbiegung quer zur Produktionsrichtung besonders geeignet.The present invention takes a different approach here, in that preferably only one inlet heating plate is bent transversely to the direction of production to form a bulge or transverse bending, or stationary bent and the opposite inlet heating plate is linearly transversely to the production direction, out of its inclination (also stationary), or active is held. This is not contradicted by the possibility of adjusting an inlet profile in the longitudinal direction by bending the inlet plates in the longitudinal direction for adjusting the height of the inlet gap, since a curvature in the longitudinal direction, for example, a curvy profile is set, but in the transverse direction a linear, parallel to the rolling rods, Line should be kept. It thus results in bent inlet plates no plane level. In contrast, hinge plates are not usually designed to be bent transversely to the direction of production because of problems with the joint connection to the subsequent hinge or press plate (main press area). For this reason, the present teaching is particularly applicable to this type of continuously operating presses, wherein the opposite inlet heating, usually arranged below, in the longitudinal direction may have a fixed inlet radius. In particular, such a Einlaufheizplatte is particularly suitable for bending transversely to the production direction.
Weitere vorteilhafte Maßnahmen und Ausgestaltungen des Gegenstandes der Erfindung gehen aus den Unteransprüchen und der folgenden Beschreibung mit der Zeichnung hervor.Further advantageous measures and embodiments of the subject matter of the invention will become apparent from the dependent claims and the following description with the drawing.
Es zeigen:
- Figur 1
- In schematischer Darstellung die Seitenansicht einer kontinuierlich arbeitenden Presse mit einlaufseitig in Produktionsrichtung angeordneten verbiegbaren Einlaufheizplatten im Einlaufbereich (I/II) und nachfolgenden Press-/Heizplatten für den Hauptpressbereich (III),
Figur 2- in einer seitlichen vergrößerten schematischen Darstellung des Einlaufbereichs einer kontinuierlich arbeitenden Presse bei der Entlüftung einer Pressgutmatte mit einem gestuften Einlaufkeilverdichter im Einlaufbereich (I/II) oben und einer Einlaufheizplatte unten,
Figur 3- eine Ansicht in Produktionsrichtung mit Darstellung eines Biegeprofils respektive einer Verbiegung einer unteren Einlaufheizplatte quer zur Produktionsrichtung,
Figur 4- eine Darstellung eines weiteren bevorzugten Biegeprofils, respektive einer Aufwölbung einer unteren Einlaufheizplatte quer zur Produktionsrichtung,
Figur 5- eine schematische Darstellung eines gestuften Einlaufkeilverdichters nach
Figur 2 mit Darstellung einer möglichen Verbiegungskontur bzw. einer Aufwölbung der unteren Einlaufheizplatte gegenüber den starren Gelenkplatten oben, Figur 6- eine Ansicht in Produktionsrichtung mit Darstellung einer statischen Verbiegung durch eine Unterlage und außen liegenden Verspannung der unteren Einlaufheizplatte,
Figur 7- einen Schnitt in Produktionsrichtung mit einer Vorderansicht eines Pressengestell mit Darstellung eines Pressengestells mit Anordnung der Stellmittel zur Verbiegung einer Einlaufheizplatte quer zur Produktionsrichtung,
Figur 8- eine perspektivische Darstellung eines Pressengestells mit einer vergrößerten Darstellung der Druckisolierungen und einer möglichen Anordnung der Stellvorrichtungen unterhalb einer nicht dargestellten unteren Einlaufheizplatte,
Figur 9- ein weiteres Ausführungsbeispiel einer schwimmend gelagerten Einlaufheizplatte auf beispielsweise drei Stellvorrichtungen im unteren Totpunkt,
Figur 10- die
Einlaufheizplatte nach Figur 9 im oberen Totpunkt der beiden äußeren Stellvorrichtungen mit vorzugsweise geregelter Druck- und/oder Wegregelung der mittleren Stellvorrichtung (nicht im oberen Totpunkt) und Figur 11- die
Einlaufheizplatte nach Figur 9 mit allen Stellvorrichtungen im oberen Totpunkt, wobei durch den verlängerten Hub der mittleren Stellvorrichtung respektive mehrerer Stellvorrichtungen in der Längsmittenlinien, eine Verbiegung der unteren Einlaufheizplatte erreicht wird.
- FIG. 1
- Schematic representation of the side view of a continuously operating press with inlet side arranged in the direction of production bendable Einlaufheizplatten in the inlet area (I / II) and subsequent press / heating plates for the main press area (III),
- FIG. 2
- in a side enlarged schematic representation of the inlet region of a continuously operating press in the venting of a pressed material mat with a stepped inlet wedge compressor in the inlet region (I / II) above and a Einlaufheizplatte below,
- FIG. 3
- a view in the production direction with representation of a bending profile or a bending of a lower Einlaufheizplatte transverse to the production direction,
- FIG. 4
- an illustration of a further preferred bending profile, respectively a bulge of a lower Einlaufheizplatte transverse to the production direction,
- FIG. 5
- a schematic representation of a stepped inlet wedge compressor after
FIG. 2 with a representation of a possible bending contour or a bulge of the lower inlet heating plate in relation to the rigid hinge plates above, - FIG. 6
- a view in the production direction with a representation of a static deflection by a base and external tension of the lower Einlaufheizplatte,
- FIG. 7
- a section in the production direction with a front view of a press frame showing a press frame with arrangement of the adjusting means for bending a Einlaufheizplatte transverse to the production direction,
- FIG. 8
- a perspective view of a press frame with an enlarged view of the pressure insulation and a possible arrangement of the adjusting devices below a bottom Einlaufheizplatte, not shown,
- FIG. 9
- a further embodiment of a floating mounted Einlaufheizplatte on, for example, three actuators at bottom dead center,
- FIG. 10
- the inlet heating plate after
FIG. 9 at the top dead center of the two outer adjusting devices with preferably regulated pressure and / or path control of the central adjusting device (not at top dead center) and - FIG. 11
- the inlet heating plate after
FIG. 9 with all adjusting devices at top dead center, wherein a deflection of the lower Einlaufheizplatte is achieved by the extended stroke of the central actuator respectively a plurality of adjusting devices in the longitudinal center lines.
In der Zeichnung wurde auf eine vollständige Abbildung einer kontinuierlich arbeitenden Presse mit jedem Detail verzichtet. Der bereits erläuterte und hier vollständig zugrunde liegende Stand der Technik ist dem Fachmann bekannt, so dass eine schematische Ansicht nach
In
In
Beim Übertritt der Rollstangen 4 über das Gelenk 8 in die zweite Verdichtungsstrecke II sind Abrollbleche 11 zwischen den Gelenkplatten 12, 13 angebracht, die für einen reibungslosen Lauf der Rollstangen 4 sorgen, wobei fast jede zueinander einstellbare Winkeligkeit der Gelenkplatten 12, 13 zueinander durch das Gelenk 8 ermöglicht wird. Zur Einstellung unterschiedlicher Verdichtungswinkel α zwischen den Gelenkplatten 12, 13 und der Pressgutmatte 7 sind im oberen Bereich des zweistufigen Einlaufkeilverdichters den Gelenkplatten 12, 13 jeweils ein zumindest an einem Stößelblech 6 des Pressengestells 35 fixiertes Stellglied 15 zugeordnet. Nach der zweiten Verdichtungsstrecke II läuft die Pressgutmatte 7 in den Hauptpressbereich III ein und wird dort auf die vorgegebene Enddicke zu einer Werkstoffplatte verdichtet und ausgehärtet. Auch hier finden sich im Bereich des zweiten Gelenks 9 Abrollbleche 11 um unterschiedlich eingestellte Winkel α zwischen der zweiten Gelenkplatte 13 und den Press-/Heizplatten 19 im Hauptpressbereich III für die vorbeilaufenden Rollstangen 4 auszugleichen.When crossing the rolling
In der besonders bevorzugten Ausführungsform nach
Es ist verständlich, dass die Vorgehensweise nach der Lehre der Erfindung auch im umgekehrten Falle funktioniert und oben eine Querverbiegung eingestellt wird und die unteren Einlaufplatten 16 respektive das unten angeordnet Einlaufgelenksystem mit zumindest zwei Gelenkplatten 12, 13 im Wesentlichen keine Querverbiegung aufweisen und parallel zu den Rollstangen 4 linear ausgerichtet sind.It is understandable that the procedure according to the teachings of the invention also works in the opposite case and above a transverse bending is set and the
Vorzugsweise wird mit dem erfindungsgemäßen Verfahren die in Richtung der gebogenen oder eine Aufwölbung 34 aufweisenden Einlaufheizplatte 16 liegende Oberflächenseite 33 der Pressgutmatte 7 während der Einklemmung und/oder der Verdichtung zumindest in Teilen quer zur Produktionsrichtung 22 konkav verformt. Dementsprechend werden auf der gegenüberliegenden Seite der Pressgutmatte im Wesentlichen ebene Gelenkplatten 12 und/oder 13 verwendet und/oder die Gelenkplatten 12 und/oder 13 im Wesentlichen eben eingestellt. Vorzugsweise wird die Einklemmung der Pressgutmatte 7 zumindest in Teilen des Einlaufbereiches I, II nahezu drucklos durchgeführt, was insbesondere für Teile oder den gesamten Einlaufbereich I gilt. Es ist von Vorteil und ein bevorzugter Anwendungsfall, wenn die Einlaufheizplatte 16 im Wesentlichen im Bereich des Mattenkontaktpunktes 17 und/oder im ersten Einlaufbereich I und/oder im zweiten Einlaufbereich II quer zur Produktionsrichtung verbogen verwendet wird oder entsprechend aktiv verbogen wird. Eine durch die Verbiegung der Einlaufheizplatte 16 entstandene Aufwölbung 34 die Pressgutmatte 7 entlüftet im Wesentlichen in Richtung der Schmalseiten 30 der Pressgutmatte 7. Besonders bevorzugt ist die Anwendung bei einer Produktionsgeschwindigkeit in Produktionsrichtung 22 von über 1,2 m/s und/oder bei einer bei Pressgutmatten 7 einer Höhe h kleiner 35 mm. Dabei soll in einer weiteren möglichen Ausführungsform die Verbiegung der Einlaufheizplatte 16 quer zur Produktionsrichtung 22 spätestens nach 0,3 bis 2 m nach beidseitigem Kontakt der Pressgutmatte 7 am Mattenkontaktpunkt 17 mit den Stahlbändern 2, 3 verwirklicht wird.Preferably, with the method according to the invention, the
Zur besseren Verdeutlichung sind in den
Vorzugsweise wird nun im Bereich der Längsmittenlinie LML mit einer größeren Kraft, beispielsweise durch Stellvorrichtungen 23, die Einlaufheizplatte 16 verbogen und an den Randseiten mit geeigneten Rückzugsmitteln 29 zurückgehalten. Entsprechend finden sich skizzenhafte Kraftpfeile unterhalb der Einlaufheizplatte 16, die diesen Sachverhalt darstellen sollen. Natürlich kann die Verbiegung der Einlaufheizplatte 16 auch statisch respektive stationär eingestellt sein, wie später noch zu zeigen sein wird. Bei mehreren Reihen an Stellvorrichtungen 23 in Produktionsrichtung bzw. in Längserstreckung der Presse kann zumindest eine Stellvorrichtung 23 oder eine Reihe 31 an Stellvorrichtungen 23 in Produktionsrichtung eine Verbiegung herbeiführen.Preferably, in the region of the longitudinal center line LML with a larger force, for example by adjusting
Je nach Bedarf bei mehreren Stellvorrichtungen 23 über die Breite gilt das auch für die benachbarte Reihen 31' der Stellvorrichtungen 23.Depending on the need for
Die Luftströmungen zeigen dabei die in vorteilhafter Weise eingeleitete Entlüftung der Pressgutmatte 7 mittels der initiierten Luftströmungen 21 in Richtung der Schmalseiten 30. Während
Die
Nach
Zur besseren Verdeutlichung ist mit
Nach den
In
In
Es sei noch mal betont, dass die Reihen 31, 31' nicht limitieren festgelegt werden dürfen. Zum einen sind zusätzliche Reihen 31' über die Breite der kontinuierlich arbeitenden Presse 1 denkbar, zum anderen müssen für eine Verbiegung oder eine Aufwölbung 34 nicht unbedingt mehrere Stellvorrichtungen 23 aktiviert werden, sondern es kann auch nur eine in einer Reihe genügen um das notwendige Ergebnis zu erreichen.It should again be emphasized that the
Die kontinuierlich arbeitende Presse kann alleinstehend Verwendung finden, ist aber auch insbesondere zur Durchführung des Verfahrens geeignet.The continuous press can be used alone, but is also particularly suitable for carrying out the method.
- 1.1.
- Kont. arbeitende PresseKont. Working press
- 2.Second
- Stahlband obenSteel band above
- 3.Third
- Stahlband untenSteel band below
- 4.4th
- Rollstangenroll bars
- 5.5th
- Einführungszahnradintroduction gear
- 6.6th
- Stößelblechram plate
- 7.7th
- Pressgutmattepress material mat
- 8.8th.
- Gelenk 1Joint 1
- 9.9th
- Gelenk 2Joint 2
- 10.10th
- UmlenktrommelUmlenktrommel
- 11.11th
- AbrollblecheAbrollbleche
- 12.12th
- Gelenkplatteplatte zu IJoint plate to I
- 13.13th
- Gelenkplatte zu IIJoint plate to II
- 14.14th
- Haltemittelholding means
- 15.15th
- hydraulische Stellgliederhydraulic actuators
- 16.16th
- Einlaufheizplatte untenInlet heating plate below
- 17.17th
- MattenkontaktpunktMatt contact point
- 18.18th
- Druckisolierungpressure isolation
- 19.19th
- Press-/Heizplatten zu IIIPress / heating plates to III
- 20.20th
- ÜbergabebandTransfer belt
- 21.21st
- Luftströmungairflow
- 22.22nd
- Produktionsrichtungproduction direction
- 23.23rd
- Stellvorrichtunglocking device
- 24.24th
- Tischblechtable sheet
- 25.25th
- Zuglaschenpull tabs
- 26.26th
- Stellvorrichtunglocking device
- 27.27th
- Stellvorrichtunglocking device
- 28.28th
- Anschlagattack
- 29.29th
- Rückzugsmittelreturn means
- 30.30th
- Schmalseitenarrow side
- 31.31st
- Reihe StellvorrichtungRow adjusting device
- 32.32nd
- Biegeprofilbending profile
- 33.33rd
- Oberflächenseitesurface side
- 34.34th
- Aufwölbungupheaval
- 35.35th
- Pressengestellpress frame
- 36.36th
- Unterlagedocument
- II
- Einlaufbereichintake area
- IIII
- Einlaufbereichintake area
- IIIIII
- HauptpressbereichMain press area
- Ee
- Einlaufspaltinlet gap
- hH
-
Höhe der Pressgutmatte 7Height of the pressed
material mat 7
Claims (15)
und/oder Gelenkplatten (12, 13) zur Einstellung der Geometrie des Einlaufspaltes (E) in Produktionsrichtung in ihrem Abstand zueinander verstellbar und/oder verbiegbar sind,
dadurch gekennzeichnet, dass
während des Durchlaufes durch den Einlaufbereich (I, II)
zumindest in einem Abschnitt in Produktionsrichtung (22) die Pressgutmatte (7)
von einer Oberflächenseite (33) mit einer quer zur Produktionsrichtung (22) im Wesentlichen linearen Einlaufheizplatte (16) oder
zumindest mit zwei quer zur Produktionsrichtung (22) im Wesentlichen linearen Gelenkplatten (12, 13)
und
von der gegenüberliegenden Oberflächenseite (33) mit einer zumindest im Bereich der Längsmittenlinie (LML) in Richtung der Pressgutmatte (7) quer zur Produktionsrichtung (22) gebogenen Einlaufheizplatte (16) eingeklemmt und/oder verdichtet wird.Process for the production of material plates in a continuously operating press (1), in the production direction (22) guided by deflection drums (10) and over rolling bars (4) supported steel bands (2, 3) a Pressgutmatte (7) an entrapment and / / or a compression in an inlet region before a main pressing region is subjected, wherein in the inlet region inlet heating plates (16)
and / or joint plates (12, 13) for adjusting the geometry of the inlet gap (E) in the production direction are adjustable in their distance from each other and / or bendable,
characterized in that
during the passage through the inlet area (I, II)
at least in one section in the production direction (22) the pressed material mat (7)
from a surface side (33) with a transverse to the production direction (22) substantially linear inlet heating plate (16) or
at least two transverse to the direction of production (22) substantially linear hinge plates (12, 13)
and
from the opposite surface side (33) is clamped and / or compacted with an inlet heating plate (16) bent at least in the region of the longitudinal center line (LML) in the direction of the pressed material mat (7) transversely to the production direction (22).
eine Einlaufheizplatte (16) im Einlaufbereich angeordnet ist,
und/oder
und/oder
an inlet heating plate (16) is arranged in the inlet region,
and or
and or
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10003654T PL2236258T3 (en) | 2009-04-01 | 2010-04-01 | Method for producing composite panels in a continuously operating press and continuously operating press |
SI201031036T SI2236258T1 (en) | 2009-04-01 | 2010-04-01 | Method for producing composite panels in a continuously operating press and continuously operating press |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009015893A DE102009015893A1 (en) | 2009-04-01 | 2009-04-01 | Process for producing material plates in a continuous press and a continuously operating press |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2236258A1 true EP2236258A1 (en) | 2010-10-06 |
EP2236258B1 EP2236258B1 (en) | 2015-07-08 |
Family
ID=42244423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10003654.0A Active EP2236258B1 (en) | 2009-04-01 | 2010-04-01 | Method for producing composite panels in a continuously operating press and continuously operating press |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2236258B1 (en) |
CN (1) | CN101856835B (en) |
DE (1) | DE102009015893A1 (en) |
HU (1) | HUE027947T2 (en) |
PL (1) | PL2236258T3 (en) |
SI (1) | SI2236258T1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103057106A (en) * | 2011-10-24 | 2013-04-24 | 珀西科股份公司 | Vertical hydraulic machine suitable for mould pressing thermoplastic or thermosetting composite material |
DE102016119837A1 (en) | 2016-10-18 | 2018-04-19 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Method for pressing a pressed material mat and continuous press |
Families Citing this family (5)
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CN103286836A (en) * | 2012-02-23 | 2013-09-11 | 戴武兵 | Fiber grinding machine and artificial wood production system |
CN102886919B (en) * | 2012-09-28 | 2016-05-18 | 上海板机电气制造有限公司 | A kind of heating platen bend protection device and guard method thereof |
DE102017110210B4 (en) * | 2017-05-11 | 2018-12-27 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Roll bar centering device for a continuous carpet press carpet roll table, roller bar carpet, continuous press, and method of centering roll bars of a roll bar carpet |
CN107160503B (en) * | 2017-07-21 | 2019-04-12 | 舟山市敏瑞科技咨询有限公司 | A kind of pressing device of plank |
CN113997373A (en) * | 2021-11-08 | 2022-02-01 | 阜阳大可新材料股份有限公司 | A equipment of evenly mating formation for fibreboard processing |
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-
2009
- 2009-04-01 DE DE102009015893A patent/DE102009015893A1/en not_active Withdrawn
-
2010
- 2010-03-31 CN CN201010157106.4A patent/CN101856835B/en not_active Expired - Fee Related
- 2010-04-01 HU HUE10003654A patent/HUE027947T2/en unknown
- 2010-04-01 SI SI201031036T patent/SI2236258T1/en unknown
- 2010-04-01 PL PL10003654T patent/PL2236258T3/en unknown
- 2010-04-01 EP EP10003654.0A patent/EP2236258B1/en active Active
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103057106A (en) * | 2011-10-24 | 2013-04-24 | 珀西科股份公司 | Vertical hydraulic machine suitable for mould pressing thermoplastic or thermosetting composite material |
CN103057106B (en) * | 2011-10-24 | 2016-12-21 | 珀西科股份公司 | Be suitable to the vertical hydraulic press of molded thermoplastics or thermoset synthetic materials |
DE102016119837A1 (en) | 2016-10-18 | 2018-04-19 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Method for pressing a pressed material mat and continuous press |
DE102016119837B4 (en) | 2016-10-18 | 2018-09-06 | Siempelkamp Maschinen- Und Anlagenbau Gmbh | Method for pressing a pressed material mat and continuous press |
Also Published As
Publication number | Publication date |
---|---|
DE102009015893A1 (en) | 2010-10-07 |
SI2236258T1 (en) | 2016-01-29 |
CN101856835A (en) | 2010-10-13 |
EP2236258B1 (en) | 2015-07-08 |
HUE027947T2 (en) | 2016-11-28 |
CN101856835B (en) | 2016-01-20 |
PL2236258T3 (en) | 2015-12-31 |
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