EP1435288B1 - Continuously operating press - Google Patents
Continuously operating press Download PDFInfo
- Publication number
- EP1435288B1 EP1435288B1 EP03029959A EP03029959A EP1435288B1 EP 1435288 B1 EP1435288 B1 EP 1435288B1 EP 03029959 A EP03029959 A EP 03029959A EP 03029959 A EP03029959 A EP 03029959A EP 1435288 B1 EP1435288 B1 EP 1435288B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- press
- continuously working
- heating plates
- press according
- 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.)
- Expired - Lifetime
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011094 fiberboard Substances 0.000 claims abstract description 9
- 239000011093 chipboard Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 40
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 13
- 210000000544 articulatio talocruralis Anatomy 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000000284 resting effect Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000000835 fiber Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000035939 shock Effects 0.000 description 8
- 238000005056 compaction Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 239000004823 Reactive adhesive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- B30B5/065—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 using anti-friction means for the pressing band
- B30B5/067—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 using anti-friction means for the pressing band using anti-friction roller means
Definitions
- the invention relates to an over-width continuously operating press according to the preamble of patent claim 1.
- Such continuous presses have become known by many industrial property rights, wherein the steel bands are supported by means of revolving rolling bars, rolling elements or roller carpets guided with their axes transversely to the running direction of the steel belts in relation to the press plates.
- rolling rods instead of rolling rods, other friction-reducing means or devices between steel belts and press plates may be provided.
- a process for the continuous production of wood-based panels, in particular of plates in the thickness range 1 to 9 mm in the dry process is known.
- DE 101 63 090 For example, such a method is described, and in particular, plates with low adhesive contents can be produced by this method.
- DE 101 09 316 a method for the continuous production of a wood-based panel is described with very low pressing times. For this purpose, a very reactive adhesive system is used. These short pressing times result in a feed rate of almost 1,000 mm / s.
- Thin plates of 2 to 4 mm thickness from the wet process are used for Part replaced by fibreboard of the same thickness from the dry process and by chipboard of a thickness of about 15 mm.
- the 15 mm chipboard absorbs about the same force as the fiberboard.
- the thin panels are mainly used as furniture backs and drawer bottoms. With this use, they can also be coated on one side or painted. Lately, the direct painting of the plate surface is becoming increasingly prevalent. The previously necessary grinding process is eliminated. For an economically direct painting, however, the plates must meet certain requirements.
- the surface density must be above 1000 kg / m 3 and the density maximum must be directly at the surface. At a lower density of the paint is absorbed by the plate, resulting in the increased use of paint at a higher cost.
- the invention has for its object to provide a continuously operating press of the type mentioned, with a greater deformability and elasticity of the heating plates and their action on the pressed material within the pressing area is possible and with the very short pressing times thin fiberboard with optimum density profile, in particular a high density in the Cover layers with density difference between the top and middle layers can be produced.
- the solution according to the invention has the particular advantage that the deformability and the elasticity of the significantly thinner rolling plates mounted under the heating plates, with a thickness of approximately 2 to 20 mm, is utilized both in the transverse and in the longitudinal direction. While in the non-critical areas with less pressure and less required deformability, the rolling plate is fully supported by the heating plates, the rolling plate is decoupled from the heating plate by additional pressure elements in the critical high pressure and deformation areas and can be elastically deformed much more.
- a highly elastic pressure pad can be generated by the attachment of a plurality of printing elements, which are not connected to each other in the transverse direction, or very elastic, which can dodge very flexible with density variations and thus prevents steel tape damage.
- very elastic By this arrangement partially higher pressures can be generated than before without damaging the steel bands.
- the pressed material is compacted almost equally over the width of a rigid heating plate (for example> 50 mm) and thus produces partially significantly higher pressing pressures, depending on the density differences.
- each pressure cylinder is equipped with a separately controllable hydraulics.
- the solution is that the pressing length of the continuous press is less than 11 m, the inlet region has a length of 1.3 m to 1.7 m and in the upper part with a joint is provided, and that the upper heating plate is formed after 1.8 to 2.4 m mat contact for a relief shock widening the press nip, for which the Schuplattendicke is between 90 - 100 mm and against the rolling rods with flexible Abrollplatten a thickness of 2 mm to 20 mm is provided.
- thin fiberboard can be produced at shortest pressing times with optimum density profiles and high density differences between the outer layers and the middle layer, wherein in the outer layers has a density of about 1000 kg / m 3 and in the middle layer below 600 kg / m 3 , with an average density of the plate less than 750 kg / m 3 , can be reached.
- the relief shock can be designed constructively between two heating plates with the pressure units so that a relief of up to 2.5 mm is possible, with the deflection of these soft heating plates and adjacent rolling plates after DE 40 10 308 by means of an ankle joint between two hot plates on a very short distance is reached.
- the heating plate or plates after the inlet to the discharge shock is very flexible.
- the high flexibility of the heating and Abrollplatten in this area thus make it possible to make the density profile course in the outer layers in a wider range than before.
- the heating plate can also be subdivided and the joints with the pressure units can be designed as load impacts.
- the load impacts are preferably arranged at 5 m or 5 and 7 m.
- the temperature of the steel strips in contact with the mat is significantly higher.
- the temperature must be above 140 ° C, preferably 155 ° C, so that at the time of maximum pressure sufficient heating of the mat surfaces has taken place.
- a roller bar heating in the return is an advantage.
- either a three- or a two-layer press mat is sprinkled on a gas-permeable forming belt 6 from a scattering station 1, then introduced with the forming belt 6 via the inlet gap 19 into the continuously operating press 3 and pressed there to form a fiber board 5.
- FIGS. 1 to 3 consists of the continuous press 3 according to the invention in its main parts of the upper frame part 7, the lower frame part 8 and these connecting racks 20.
- the arranged in the frame part 7 heating plate 14 by means of hydraulic cylinder piston units (not shown) against the lower heating plate 12 moves up and down and locked in the selected position.
- a steel strip 9 is arranged around the lower frame part 8 and a steel strip 10 around the upper frame part 7 circumferentially and out.
- the steel belts 9 and 10 are thereby pulled by drive drums 21 and 22 through the press nip 23 and initially deflected by inlet drums 17 and 18.
- the steel strips 9 and 10 are also circumferentially each provided from a rolling rods 16 forming roll bar carpet.
- a rolling rods 16 forming roll bar carpet.
- Abrollplatten 15 low density are attached to them.
- the application of the rolling plates 15 to the heating plates 12 and 14 goes in detail from the DE 40 10 308 C2 out.
- a discharge or load shock is the continuous press 3 after the inlet area of 1.8 m to 2.4 m with a discharge shock device 11 in or between two heating plates 14 and 14th and / or 12 and 12, which forms the press nip 23 widening and what the Schuplattendicke between 90 mm and 100 mm and is provided with respect to the rolling rods 16 with flexible Abrollplatten 15.
- one or more recesses 28 are provided in or between two heating plates 12 and 14, in which a plurality of printing units are arranged embedded, via the pressure cylinder 27, plunger 26, push rod 25 and pressure elements 24th a partial very high or partially very low pressure is einêtbar.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Press Drives And Press Lines (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine überbreite kontinuierlich arbeitende Presse gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to an over-width continuously operating press according to the preamble of
Solche kontinuierlich arbeitenden Pressen sind durch viele Schutzrechte bekannt geworden, wobei sich die Stahlbänder über mitlaufende, mit ihren Achsen quer zur Laufrichtung der Stahlbänder geführten Rollstangen, Wälzkörpern oder Rollenteppichen gegenüber den Pressplatten abstützen. Statt Rollstangen können auch andere reibungsmindernde Mittel oder Vorrichtungen zwischen Stahlbänder und Pressplatten vorgesehen sein.Such continuous presses have become known by many industrial property rights, wherein the steel bands are supported by means of revolving rolling bars, rolling elements or roller carpets guided with their axes transversely to the running direction of the steel belts in relation to the press plates. Instead of rolling rods, other friction-reducing means or devices between steel belts and press plates may be provided.
Insbesondere bei der Herstellung von Span- und MDF-Platten werden heute solche kontinuierlich arbeitenden Pressen verwendet. Auch zur Herstellung von OSB und LVL setzt sich diese Technologie mittlerweile zunehmend durch. Die Vorteile gegenüber taktgebundenen Pressen sind die höhere Prozess-Stabilität und vor allem die höhere Wirtschaftlichkeit der kontinuierlich arbeitenden Pressen, die in den geringeren Schleifzugaben und dem Wegfall der Besäumverluste beim Schneiden auf Länge begründet liegen.In particular, in the production of particleboard and MDF boards such continuous presses are used today. In the meantime, this technology is increasingly gaining ground for the manufacture of OSB and LVL. The advantages compared to clock-fed presses are the higher process stability and, above all, the higher profitability of the continuously operating presses Presses that are due to the lower grinding allowances and the elimination of Besäumverluste when cutting to length.
Ein Verfahren zur kontinuierlichen Herstellung von Holzwerkstoffplatten, insbesondere von Platten im Dickenbereich 1 bis 9 mm im Trockenverfahren ist bekannt. In der
Es hat sich aber herausgestellt, dass die bestehenden Verfahren und Anlagen einige Nachteile bei der Produktion von dünnen Platten aufweisen. Dies betrifft im wesentlichen die erreichte mittlere Dichte und die Oberflächendichte der Platte. Dünnplatten mit 2 bis 4 mm Dicke aus dem Nassverfahren werden zum Teil durch Faserplatten gleicher Dicke aus dem Trockenverfahren und durch Spanplatten einer Dicke von etwa 15 mm ersetzt. Die 15 mm Spanplatten nehmen etwa die gleiche Kraft auf wie die Faserplatten. Aber durch die Verwendung der dicken Spanplatten wird das Möbel schwerer, so dass nur ein begrenzter Einsatz möglich ist. Die dünnen Platten werden vorwiegend als Möbelrückwände und Schubladenböden eingesetzt. Bei dieser Verwendung können sie auch einseitig beschichtet oder lackiert werden. In letzter Zeit setzt sich zunehmend die direkte Lackierung der Plattenoberfläche durch. Der vorher notwendige Schleifvorgang entfällt. Für eine wirtschaftlich direkte Lackierung müssen die Platten jedoch bestimmten Anforderungen genügen. Die Oberflächendichte muss über 1000 kg/m3 betragen und das Dichtemaximum muss direkt an der Oberfläche sein. Bei einer niedrigeren Dichte wird der Lack von der Platte aufgesogen, was durch den vermehrten Lackeinsatz zu höheren Kosten führt.A process for the continuous production of wood-based panels, in particular of plates in the thickness range 1 to 9 mm in the dry process is known. In the
However, it has been found that the existing methods and equipment have some disadvantages in the production of thin plates. This essentially relates to the achieved average density and the surface density of the plate. Thin plates of 2 to 4 mm thickness from the wet process are used for Part replaced by fibreboard of the same thickness from the dry process and by chipboard of a thickness of about 15 mm. The 15 mm chipboard absorbs about the same force as the fiberboard. But by using the thick chipboard furniture is heavier, so that only a limited use is possible. The thin panels are mainly used as furniture backs and drawer bottoms. With this use, they can also be coated on one side or painted. Lately, the direct painting of the plate surface is becoming increasingly prevalent. The previously necessary grinding process is eliminated. For an economically direct painting, however, the plates must meet certain requirements. The surface density must be above 1000 kg / m 3 and the density maximum must be directly at the surface. At a lower density of the paint is absorbed by the plate, resulting in the increased use of paint at a higher cost.
Bei den bekannten Doppelbandpressen ist es trotz einer Mattenbesprühung und/oder Deckschichtdampfvorwärmung sehr schwierig, sehr hohe Dichteunterschiede zwischen Deck- und Mittelschicht zu erreichen, da der Wärme- und Druckverlauf während der Heißpressung nicht optimal gesteuert werden kann.In the known double belt presses, it is very difficult, despite a Mattenbesprühung and / or cover layer steam preheating to achieve very high density differences between the top and middle layer, since the heat and pressure curve during the hot pressing can not be optimally controlled.
Auch ist eine schnelle Entlastung nach dem Ausbilden der Deckschicht nicht möglich, wodurch ebenfalls die Breite der Deckschichtdichte unnötig groß ausgebildet wird. Die Entlastung ist aufgrund der begrenzten Flexibilität der Heizplatten, also der möglichen Verformung pro Meter Presslänge, nicht möglich. Der Einsatz längerer Pressen bei denen die Flexibilität pro Meter Presslänge geringer sein könnte, ist bei den angestrebten geringen Presszeiten unwirtschaftlich.Also, a rapid release after the formation of the cover layer is not possible, whereby also the width of the cover layer density unnecessarily large is trained. The relief is not possible due to the limited flexibility of the heating plates, so the possible deformation per meter of press length. The use of longer presses where the flexibility per meter press length could be lower, is uneconomical at the desired low pressing times.
Demnach hat sich bei den bisher bekannten Ausführungen von kontinuierlichen Pressen herausgestellt, dass die relativ steifen Heizplatten sowohl in Längs- als auch in Querrichtung vor allem bei kurzen Pressen sehr geringe Verformungsmöglichkeiten aufweisen. Dadurch ist die technologische Verformbarkeit der herzustellenden Faserplatten in Längsrichtung begrenzt. Als weiterer Nachteil hat sich herausgestellt, dass, trotz entsprechender Anzahl von Zylinderanordnungen in Querrichtung, die Heizplatten vor allem bei Dünnplatten und HDF-Plattenproduktionen gegenüber Dichtefehlern, Leimklumpen oder dgl. in der Fasermatte im Hochdruckbereich zu steif sind, um diesen Materialverdichtungen auszuweichen. Dies führte in der Vergangenheit immer wieder zu Stahlbandschäden.
Der Erfindung liegt die Aufgabe zugrunde, eine kontinuierlich arbeitende Presse der genannten Art zu schaffen, mit der eine größere Verformbarkeit und Elastizität der Heizplatten und ihrer Einwirkung auf das Pressgut innerhalb des Pressbereichs möglich ist und mit dem bei sehr kurzen Presszeiten dünne Faserplatten mit optimalem Dichteprofil, insbesondere eine hohe Dichte in den Deckschichten mit Dichteunterschied zwischen Deck- und Mittelschicht, herstellbar sind.Accordingly, it has been found in the previously known embodiments of continuous presses that the relatively rigid heating plates both in the longitudinal and in the transverse direction, especially in short presses have very low deformation possibilities. As a result, the technological deformability of the fiberboard to be produced is limited in the longitudinal direction. Another disadvantage has been found that, despite the corresponding number of cylinder arrangements in the transverse direction, the hot plates are too stiff especially in thin plates and HDF plate productions against density errors, glue lumps or the like. In the fiber mat in the high pressure region to avoid these material compaction. In the past, this has repeatedly led to steel strip damage.
The invention has for its object to provide a continuously operating press of the type mentioned, with a greater deformability and elasticity of the heating plates and their action on the pressed material within the pressing area is possible and with the very short pressing times thin fiberboard with optimum density profile, in particular a high density in the Cover layers with density difference between the top and middle layers can be produced.
Die Lösung dieser Aufgabe geht aus dem kennzeichnenden Teil des Anspruches 1 wie folgt hervor: zur Erzeugung partiell sehr hoher Drücke von 4 bis 8 N/mm2 auf die Pressgutmatte eine oder mehrere über die Breite der Heizplatten reichende Ausnehmungen vorgesehen sind, in die mehrere Druckeinheiten eingelassen angeordnet sind, wobei über Druckzylinder, Druckkolben, Druckstössel und Druckelement einer gegenüber dem mittleren Heizplattendruck erhöhter partieller Druck auf das Pressgut/Pressgutmatte einsteuerbar ist.The solution of this problem is apparent from the characterizing part of
Die erfindungsgemäße Lösung hat insbesondere den Vorteil, dass die Verformbarkeit und die Elastizität der unter den Heizplatten angebrachten deutlich dünneren Abrollplatten, mit einer Dicke von ca. 2 bis 20 mm sowohl in Quer- als auch in Längsrichtung ausgenutzt wird. Während in den unkritischen Bereichen mit weniger Druck und weniger benötigter Verformbarkeit die Abrollplatte voll von den Heizplatten unterstützt wird, wird in den kritischen Hochdruck- und Verformungsbereichen die Abrollplatte von der Heizplatte durch zusätzliche Druckelemente entkoppelt und kann elastisch wesentlich stärker verformt werden.The solution according to the invention has the particular advantage that the deformability and the elasticity of the significantly thinner rolling plates mounted under the heating plates, with a thickness of approximately 2 to 20 mm, is utilized both in the transverse and in the longitudinal direction. While in the non-critical areas with less pressure and less required deformability, the rolling plate is fully supported by the heating plates, the rolling plate is decoupled from the heating plate by additional pressure elements in the critical high pressure and deformation areas and can be elastically deformed much more.
Gerade im Hochdruckbereich kann durch die Anbringung von einer Vielzahl von Druckelementen, die in Querrichtung nicht miteinander, oder sehr elastisch miteinander verbunden sind ein hochelastisches Druckkissen erzeugt werden, welches bei Dichteschwankungen sehr flexibel ausweichen kann und somit Stahlbandbeschädigungen verhindert. Durch diese Anordnung können partiell höhere Drücke als bisher erzeugt werden ohne die Stahlbänder zu beschädigen.Especially in the high pressure area, a highly elastic pressure pad can be generated by the attachment of a plurality of printing elements, which are not connected to each other in the transverse direction, or very elastic, which can dodge very flexible with density variations and thus prevents steel tape damage. By this arrangement partially higher pressures can be generated than before without damaging the steel bands.
Bei einer inhomogenen Fasermatte mit Dichtunterschieden, Leimklumpen und dgl. wird bei einer steifen Heizplatte (zum Beispiel > 50 mm) das Pressgut über die Breite überall in etwa gleich verdichtet und erzeugt somit abhängig von den Dichteunterschieden partiell deutlich höhere Pressdrücke.In the case of an inhomogeneous fiber mat with differences in density, glue lumps and the like, the pressed material is compacted almost equally over the width of a rigid heating plate (for example> 50 mm) and thus produces partially significantly higher pressing pressures, depending on the density differences.
Bei den extrem weichen Abrollplatten (< 20 mm) kann sich diese über die Breite sehr leicht verformen und weicht bei Dichteunterschieden durch die homogene Druckbeaufschlagung entsprechend aus ohne partiell höhere Drücke zu erzeugen. Da Stahlbandschäden erst bei Überschreitung eines partiellen Grenzdruckes auftreten ist die Anordnung des erfindungsgemäßen Druckkissens mit den Druckeinheiten in der Anordnung speziell im Hochdruckbereich notwendig.In the case of the extremely soft rolling plates (<20 mm), this can deform very easily across the width and, given differences in density, deviates correspondingly from the homogeneous pressurization without producing partially higher pressures. Since damage to the steel strip occurs only when a partial limit pressure is exceeded, the arrangement of the pressure pad according to the invention with the printing units in the arrangement is necessary especially in the high-pressure area.
In den nachfolgenden Druckbereichen wird ein deutlich geringerer Pressdruck gefahren (meist weniger als die Hälfte des Hochdruckbereiches), d.h. der Pressspalt wird wieder geöffnet, die Gefahr von Stahlbandschäden ist geringer und ein Druckkissen in dieser extrem elastischen Form ist nicht mehr notwendig.In the following pressure ranges a significantly lower pressure is driven (usually less than half of the high pressure area), ie the Pressing gap is opened again, the risk of steel strip damage is lower and a pressure pad in this extremely elastic shape is no longer necessary.
Für extreme Pressbedingungen kann es zweckmäßig sein, wenn die Druckelemente in den Ausnehmungen verschieden lang über die Breite der Heizplatten ausgeführt und jeder Druckzylinder mit einer separat ansteuerbaren Hydraulik ausgestattet ist.For extreme pressing conditions, it may be expedient if the pressure elements in the recesses of different lengths over the width of the heating plates and each pressure cylinder is equipped with a separately controllable hydraulics.
Zur Herstellung von dünnen Faserplatten mit einer kontinuierlich arbeitenden Presse besteht die Lösung darin, dass die Presslänge der kontinuierlich arbeitenden Presse geringer als 11 m ist, der Einlaufbereich eine Länge von 1,3 m bis 1,7 m aufweist und im oberen Teil mit einem Gelenk versehen ist, und dass die obere Heizplatte nach 1,8 bis 2,4 m Mattenkontakt für einen Entlastungsstoß den Pressspalt erweiternd ausgebildet ist, wofür die Heizplattendicke zwischen 90 ― 100 mm beträgt und gegenüber den Rollstangen mit flexiblen Abrollplatten einer Dicke von 2 mm bis 20 mm versehen ist.For the production of thin fibreboard with a continuous press, the solution is that the pressing length of the continuous press is less than 11 m, the inlet region has a length of 1.3 m to 1.7 m and in the upper part with a joint is provided, and that the upper heating plate is formed after 1.8 to 2.4 m mat contact for a relief shock widening the press nip, for which the Heizplattendicke is between 90 - 100 mm and against the rolling rods with flexible Abrollplatten a thickness of 2 mm to 20 mm is provided.
Mit der kontinuierlich arbeitenden Presse gemäß der Erfindung sind dünne Faserplatten bei kürzesten Presszeiten mit optimalen Dichteprofilen und hohen Dichteunterschieden zwischen den Deckschichten und der Mittelschicht herstellbar, wobei in den Deckschichten eine Dichte von über 1000 kg/m3 und in der Mittelschicht unter 600 kg/m3, bei einer mittleren Dichte der Platte geringer als 750 kg/m3, erreichbar sind.With the continuous press according to the invention thin fiberboard can be produced at shortest pressing times with optimum density profiles and high density differences between the outer layers and the middle layer, wherein in the outer layers has a density of about 1000 kg / m 3 and in the middle layer below 600 kg / m 3 , with an average density of the plate less than 750 kg / m 3 , can be reached.
Der Entlastungsstoß kann zwischen zwei Heizplatten mit den Druckeinheiten konstruktiv so ausgeführt werden, dass eine Entlastung um bis zu 2,5 mm möglich ist, wobei die Verbiegung mit diesen weichen Heizplatten und daran anliegenden Abrollplatten nach
Demnach ist die Heizplatte oder die Heizplatten nach dem Einlauf bis zum Entlastungsstoß sehr flexibel ausgebildet. Die hohe Flexibilität der Heiz- und Abrollplatten in diesem Bereich erlauben es also den Dichteprofilverlauf in den Deckschichten in einem weiteren Bereich als bisher zu gestalten.Accordingly, the heating plate or plates after the inlet to the discharge shock is very flexible. The high flexibility of the heating and Abrollplatten in this area thus make it possible to make the density profile course in the outer layers in a wider range than before.
Als Alternative bzw. als Ergänzung kann die Heizplatte auch unterteilt werden und die Stöße mit den Druckeinheiten als Belastungsstöße ausgeführt werden. Die Belastungsstöße sind bevorzugt bei 5m oder nach 5 und 7 m angeordnet.As an alternative or as a supplement, the heating plate can also be subdivided and the joints with the pressure units can be designed as load impacts. The load impacts are preferably arranged at 5 m or 5 and 7 m.
Wesentlich neben der Flexibilität der Heizplatten ist die Temperatur der Stahlbänder bei Mattenkontakt. Die Temperatur muss über 140 °C vorzugsweise 155 °C betragen, damit zu dem Zeitpunkt des maximalen Druckes eine ausreichende Erwärmung der Mattenoberflächen statt gefunden hat. Auch eine Rollstangenbeheizung im Rücklauf ist von Vorteil.Significant next to the flexibility of the heating plates is the temperature of the steel strips in contact with the mat. The temperature must be above 140 ° C, preferably 155 ° C, so that at the time of maximum pressure sufficient heating of the mat surfaces has taken place. A roller bar heating in the return is an advantage.
Am Pressenauslauf muss allerdings zur exakten Dickeneinstellung über die Breite eine Möglichkeit der transversalen Verformung der Heizplatte vorgesehen werden. Dies kann zum Beispiel mittels Multipötte durchgeführt werden.At the press outlet, however, a possibility of the transverse deformation of the heating plate must be provided for the exact thickness adjustment across the width. This can be done for example by means of multipots.
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- die kontinuierlich arbeitende Presse gemäß der Erfindung in Seitenansicht,
- Figur 2
- die Entlastungsstoßvorrichtung in größerem Maßstab nach einem Ausschnitt A aus
Figur 1 Figur 3- die Entlastungsstoßvorrichtung in größerem Maßstab in einem Schnitt a-a aus
Figur 1
- FIG. 1
- the continuous press according to the invention in side view,
- FIG. 2
- the discharge shock device on a larger scale after a cutout A from
FIG. 1 and - FIG. 3
- the discharge shock device on a larger scale in a section aa
FIG. 1 ,
Bei einer Produktionsanlage wird aus einer Streustation 1 entweder eine Drei- oder eine Zweischichtpressgutmatte auf einem gasdurchlässigen Formband 6 aufgestreut, anschließend mit dem Formband 6 über den Einlaufspalt 19 in die kontinuierlich arbeitende Presse 3 eingeführt und dort zu einer Faserplatte 5 verpresst.In a production plant, either a three- or a two-layer press mat is sprinkled on a gas-permeable forming belt 6 from a
Nach den
Zum Ziehen und Pressen der Preßgutmatte 4 durch die kontinuierlich arbeitende Presse 3 ist ein Stahlband 9 um den unteren Rahmenteil 8 und ein Stahlband 10 um den oberen Rahmenteil 7 umlaufend angeordnet und geführt. Die Stahlbänder 9 und 10 werden dabei von Antriebstrommeln 21 und 22 durch den Pressspalt 23 gezogen und am Anfang mittels Einlauftrommeln 17 und 18 umgelenkt. Zur Reibungsminderung zwischen den am unteren Rahmenteil 8 und am oberen Rahmenteil 7 angebrachten Heizplatten 12 und 14 sind den Stahlbändern 9 und 10 ebenfalls umlaufend je ein aus Rollstangen 16 sich bildender Rollstangenteppich vorgesehen. Zur Schonung der Heizplatten 12 und 14 sind an ihnen gehärtete Abrollplatten 15 geringer Dichte angebracht. Die Aufbringung der Abrollplatten 15 an den Heizplatten 12 und 14 geht ausführlich aus der
For drawing and pressing the
Für einen Ent- oder Belastungsstoß ist die kontinuierlich arbeitende Presse 3 nach dem Einlaufbereich von 1,8 m bis 2,4 m mit einer Entlastungsstoßvorrichtung 11 in oder zwischen zwei Heizplatten 14 und 14 und/oder 12 und 12 versehen, die den Pressspalt 23 erweiternd ausbildet und wofür die Heizplattendicke zwischen 90 mm und 100 mm beträgt sowie gegenüber der Rollstangen 16 mit flexiblen Abrollplatten 15 versehen ist.For a discharge or load shock is the
Für einen Entlastungsstoß und/oder einen Belastungsstoß auf die Preßgutmatte 4 sind ein oder mehrere Ausnehmungen 28 in oder zwischen zwei Heizplatten 12 und 14 vorgesehen, in die mehrere Druckeinheiten eingelassen angeordnet sind, wobei über die Druckzylinder 27, Druckkolben 26, Druckstössel 25 und Druckelemente 24 ein partieller sehr hoher oder partiell sehr niedriger Druck einsteuerbar ist.For a relief shock and / or a load impact on the
- 1.1.
- Streustationspreading station
- 2.Second
- 3.Third
- kontinuierlich arbeitende Pressecontinuously working press
- 4.4th
- Preßgutmattepress material mat
- 5.5th
- Faserplattefibreboard
- 6.6th
- Formbandforming belt
- 7.7th
- Oberes RahmenteilUpper frame part
- 8.8th.
- Unteres RahmenteilLower frame part
- 9.9th
- Unteres StahlbandLower steel band
- 10.10th
- Oberes StahlbandUpper steel band
- 11.11th
- EntlastungsstoßvorrichtungRelief pusher
- 12.12th
- Untere HeizplatteLower heating plate
- 13.13th
- 14.14th
- Obere HeizplatteUpper heating plate
- 15.15th
- Abrollplatterolling plate
- 16.16th
- Rollstangenroll bars
- 17.17th
- Untere EinlauftrommelLower inlet drum
- 18.18th
- Obere EinlauftrommelUpper inlet drum
- 19.19th
- Einlaufspaltinlet gap
- 20.20th
- Gestellframe
- 21.21st
- Untere AntriebstrommelLower drive drum
- 22.22nd
- Obere AntriebstrommelUpper drive drum
- 23.23rd
- Pressspaltpress nip
- 24.24th
- Druckelementeprint elements
- 25.25th
- Druckstösselpressure plunger
- 26.26th
- Druckkolbenpressure piston
- 27.27th
- Zylindercylinder
- 28.28th
- Ausnehmungrecess
Claims (11)
- A continuously working press for producing chipboards, fiberboards or similar boards, especially thin fiberboards, comprising a press frame (20) with a movable upper frame part (7) and a fixed bottom frame part (8), heating plates (12, 14) fixed thereto in the direction of the pressed material and two endless steel bands (9, 10) which transmit the pressing pressure and pull the pressed material through the press nip (23) of the continuously working press (3), with the steel bands (9, 10) being guided in a revolving manner via drive and deflection drums (17. 18. 21. 22) about the upper frame part (7) and the bottom frame part (8) and resting with adjustable press nip (23) via entrained roller bars (16) against heating plates (12, 14), which roller bars are guided with their axes transversally to the direction of the belt travel, characterized in that for the purpose of producing partially very high pressures of 4 to 8 N/mm2 on the pressed material mat (4) one or several recesses (28) are provided which reach over the width (b) of the heating plates (12, 14) and in which several press units (24, 25, 26, 27) are arranged in an embedded manner, with a partial pressure which is increased over the mean heating plate pressure being applicable to the pressed material/pressed material mat (4) via pressure cylinders (27), pressure pistons (26), pressure tappets (25) and pressure element (24).
- A continuously working press according to claim 1, characterized in that several recesses (28) are provided in the heating plates (12, 14) for the pressure units (24, 25, 26, 27) in the longitudinal direction of the press (3).
- A continuously working press according to claims 1 and 2, characterized in that each pressure cylinder (27) of the pressure units (24, 25, 26) is equipped with a hydraulic system that can be actuated separately.
- A continuously working press according to the claims 1 to 3, characterized in that the press length of the continuously working press (3) is less than 11 m, the entry region has a length of 1.3 to 1.7 m and is provided in the upper part with a joint, and the upper heating plate (14) is arranged to expand the press nip (23) after 1.8 to 2.4 m of mat contact for a relief joint (11), for which purpose the thickness of the heating plate is between 90 and 100 mm and is provided in relation to the roller bars (16) with flexible rolling plates (15) of a thickness of 2 mm to 20 mm.
- A continuously working press according to the claims 1 to 4, characterized in that the relief joint (11) is arranged between two heating plates (12. 14) and is adjustable to expand the press nip (23) by means of hydraulic pressing cylinders to an offset of the heating plates (12, 14) by up to 2.5 mm.
- A continuously working press according to the claims 1 to 5, characterized in that an ankle joint with spring-elastic coupling is arranged for the relief between two heating plates (12, 14).
- A continuously working press according to the claims 1 to 6, characterized in that the steel hands (9, 10) and the roller bars (16) are guided through a heating device in return travel.
- A continuously working press according to the claims 1 tn 7, characterized in that the pressure elements (24) are arranged to be narrow in relation to the width (b) and are not or elastically connected with one another in the transverse direction.
- A continuously working press according to the claims 1 to 8, characterized in that a loading jolt can be activated after approx. 5 m from contact with the mat.
- A continuously working press according to the claims 1 to 9, characterized in that several loading jolts can be activated between 5 m and 7 m from contact with the mat.
- A continuously working press according to the claims 1 to 10. characterized in that for the purpose of calibrating the fiberboard (5) in the outlet region the action ot multiple potentiometers on the heating plates (12, 14) can be triggered.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10261729 | 2002-12-30 | ||
| DE10261729A DE10261729A1 (en) | 2002-12-30 | 2002-12-30 | Continuously working press |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1435288A2 EP1435288A2 (en) | 2004-07-07 |
| EP1435288A3 EP1435288A3 (en) | 2005-12-21 |
| EP1435288B1 true EP1435288B1 (en) | 2010-09-29 |
Family
ID=32478117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03029959A Expired - Lifetime EP1435288B1 (en) | 2002-12-30 | 2003-12-30 | Continuously operating press |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1435288B1 (en) |
| AT (1) | ATE482821T1 (en) |
| DE (2) | DE10261729A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005000717A1 (en) * | 2005-01-03 | 2006-07-20 | Dieffenbacher Gmbh + Co. Kg | Continuous press for the production of plates |
| DE102005053920B4 (en) * | 2005-11-11 | 2017-06-08 | Dieffenbacher GmbH Maschinen- und Anlagenbau | Method for adjusting an inlet wedge compressor of a continuous press in the course of the production of material plates and a continuous press for performing the method |
| JP5412020B2 (en) * | 2007-06-02 | 2014-02-12 | 吉野石膏株式会社 | Gypsum board forming apparatus and gypsum board manufacturing method |
| CA3157151A1 (en) * | 2019-10-18 | 2021-04-22 | Valinge Innovation Ab | A continuous press arrangement and a method for manufacture of building panels |
| AT523304A1 (en) * | 2019-12-19 | 2021-07-15 | Berndorf Band Gmbh | Double belt press with at least one pressing device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4010308C2 (en) * | 1990-03-30 | 1995-04-06 | Dieffenbacher Gmbh Maschf | Continuously working press |
| DE19518879A1 (en) * | 1995-05-28 | 1996-12-05 | Dieffenbacher Gmbh Maschf | Mfr of chipboard etc. by stepped pressing between steel strips |
| DE19918492C5 (en) * | 1999-04-23 | 2006-10-05 | Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg | Process for pressing pressed material mats into pressed material slabs in the course of the production of chipboard, fiberboard and other wood-based panels |
| DE10109316A1 (en) * | 2001-02-27 | 2002-09-05 | Dieffenbacher Gmbh Maschf | Continuous preparation of wood-based boards, in which the binder-impregnated particles for pressing have controlled temperature and moisture content |
| DE10123793C2 (en) * | 2001-05-16 | 2003-08-21 | Metso Paper Inc | Process for the continuous production of chipboard and similar sheet-like board materials and corresponding double belt press |
| DE10261730A1 (en) * | 2002-12-30 | 2004-07-08 | Dieffenbacher Gmbh + Co. Kg | Process with plant and continuously working press for the production of wood-based panels |
-
2002
- 2002-12-30 DE DE10261729A patent/DE10261729A1/en not_active Withdrawn
-
2003
- 2003-12-30 DE DE50313126T patent/DE50313126D1/en not_active Expired - Lifetime
- 2003-12-30 AT AT03029959T patent/ATE482821T1/en not_active IP Right Cessation
- 2003-12-30 EP EP03029959A patent/EP1435288B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1435288A3 (en) | 2005-12-21 |
| EP1435288A2 (en) | 2004-07-07 |
| DE50313126D1 (en) | 2010-11-11 |
| DE10261729A1 (en) | 2004-07-08 |
| ATE482821T1 (en) | 2010-10-15 |
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