EP0134250B1 - Apparatus for manufacturing pressed shaped articles - Google Patents
Apparatus for manufacturing pressed shaped articles Download PDFInfo
- Publication number
- EP0134250B1 EP0134250B1 EP83106760A EP83106760A EP0134250B1 EP 0134250 B1 EP0134250 B1 EP 0134250B1 EP 83106760 A EP83106760 A EP 83106760A EP 83106760 A EP83106760 A EP 83106760A EP 0134250 B1 EP0134250 B1 EP 0134250B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- outer edge
- pressing tool
- pressed
- tool part
- undersides
- 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
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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
- B27N5/00—Manufacture of non-flat articles
Definitions
- the invention relates to a device for the production of pressed, at least on the underside coated profile bodies with horizontal undersides in the region of the outer edge made of a non-climbable mixture consisting of a cold press consisting of an upper part and a lower part for producing a pre-compact and a hot press consisting of an upper part and a lower part .
- Such presses for the production of profile bodies provided with a decorative covering layer such as cladding profiles for the production of external and internal claddings in the construction sector, balcony claddings, table tops and the like are known (DE-PS 25 48 739).
- Such profile bodies are generally produced in such a way that a pre-compact which is already very similar to the finished profile body is pressed from the mixture in a cold press. Although the amount of heat required to cure the thermosetting binder is not supplied to the preform during manufacture, it is already a solid, manageable body.
- the pre-pressed part is made into the finished profile body by hot pressing in the hot press. As a rule, it is provided with a top layer on its top and bottom.
- the presses are designed such that the pressing tool upper parts and the pressing tool lower parts are profiled in the same way in accordance with the shape of the profile body to be pressed.
- the non-rising mixture usually consists of lignocellulosic fibrous materials, such as shredded and dried wood shavings, bagasse fibers and the like. ⁇ ., which are mixed with a thermosetting synthetic resin, such as a melamine-urea formaldehyde or phenol formaldehyde resin.
- a thermosetting synthetic resin such as a melamine-urea formaldehyde or phenol formaldehyde resin.
- fibers of other materials such as glass fibers, rock wool or asbestos fibers, alone or several of them mixed with one another, to which appropriate, preferably organic, binders have been added can also be used.
- the cover layer usually consists of at least two layers, namely a decorative layer, for example a woven fabric, a veneer, a printed paper film or a plastic film, over which a transparent protective layer is arranged.
- a decorative layer for example a woven fabric, a veneer, a printed paper film or a plastic film
- a transparent protective layer is arranged over which a transparent protective layer is arranged.
- So-called clear overlay paper consisting of unfilled alpha cellulose paper or glass fiber fleece, which is impregnated with a thermoset, usually based on melamine, is usually used as a protective layer.
- the transparent protective layer can also be produced in that the decorative layer has a stronger resin layer.
- the known device has proven itself very well in the production of pressed profile bodies of the most varied types provided with a decorative layer.
- the underside coating had tears near this edge. This appearance is not only a cosmetic flaw in the profile body but also a technical flaw, because the covering layer is intended to completely envelop the profile body and improve its weather resistance.
- the object of the application is to improve the device for producing the profile body in such a way that the underside coating of the profile body no longer tears on the outer edge of the underside.
- This object is achieved in that the pressing surface assigned to the horizontal underside of the lower part of the cold press is curved upward in the region of the outer edge with respect to the horizontal underside.
- the cross section of the profile body shown in FIG. 1, which can be, for example, a table top, has an outer edge in which the surfaces 1 and 2 abut one another almost at right angles.
- Fig. 2 shows the cold press for the production of the pre-compact. This consists of the upper part 3 and the lower part 4.
- the lower part 4 is provided on its outer edge, that is the part which also presses the outer edge of the preform, with the upward curvature 5.
- the prepress produced with such a press is illustrated in FIG. 3. It has an upward curvature in the area of surface 21.
- This preform is inserted into a hot press, which also consists of an upper part 6 and a lower part 7, after the film 8 which later forms the cover layer on the underside of the profile body has been inserted into the lower part 7. If the upper part 6 is now moved towards the lower part 7 for hot pressing of the profile body, then the lower outer edge surface of the pre-compact is not abruptly pressed against the film 8, whereby this clamped unevenly prevented from flowing and can therefore tear. Rather, the outer. Edge surface of the pre-pressed bit by bit pressed against the film and thus allows a continuous Nuclear touch and connection of film and pre-compact. This reliably prevents cracks in the film.
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Herstellung von gepreßten, zumindest an der Unterseite beschichteten Profilkörpern mit im Bereich der äußeren Kante waagerechten Unterseiten aus einern nicht steigfähigen Gemisch bestehend aus einer aus Oberteil und Unterteil bestehenden Kaltpresse zur Herstellung eines Vorpreßlings und einer aus Oberteil und Unterteil bestehenden Heißpresse.The invention relates to a device for the production of pressed, at least on the underside coated profile bodies with horizontal undersides in the region of the outer edge made of a non-climbable mixture consisting of a cold press consisting of an upper part and a lower part for producing a pre-compact and a hot press consisting of an upper part and a lower part .
Derartige Pressen zur Herstellung von mit einer dekorativen Hüllschicht versehenen Profilkörpern, wie Verkleidungsprofilen für die Herstellung von Außen- und Innenverkleidungen auf dem Bausektor, Balkonverkleidungen, Tischplatten und dgl. sind bekannt (DE-PS 25 48 739).Such presses for the production of profile bodies provided with a decorative covering layer, such as cladding profiles for the production of external and internal claddings in the construction sector, balcony claddings, table tops and the like are known (DE-PS 25 48 739).
Solche Profilkörper werden in der Regel in der Weise hergestellt, daß in einer Kaltpresse aus dem Gemisch ein dem fertigen Profilkörper bereits sehr ähnlicher Vorpreßling gepreßt wird. Obwohl bei der Herstellung des Vorpreßlings diesem nicht die zum Aushärten des wärmehärtbaren Bindemittels erforderliche Wärmemenge zugeführt wird, ist er schon ein fester, handhabbarer Körper. Aus dem Vorpreßling entsteht durch Heißpressen in der Heißpresse der fertige Profilkörper. Er wird in der Regel gleichzeitig auf seiner Ober- und Unterseite mit einer Deckschicht versehen. Die Pressen sind bei der bekannten Vorrichtung derart ausgebildet, daß die Preßwerkzeugoberteile und die Preßwerkzeugunterteile der Gestalt des zu pressenden Profilkörpers entsprechend in gleicher Weise profiliert sind.Such profile bodies are generally produced in such a way that a pre-compact which is already very similar to the finished profile body is pressed from the mixture in a cold press. Although the amount of heat required to cure the thermosetting binder is not supplied to the preform during manufacture, it is already a solid, manageable body. The pre-pressed part is made into the finished profile body by hot pressing in the hot press. As a rule, it is provided with a top layer on its top and bottom. In the known device, the presses are designed such that the pressing tool upper parts and the pressing tool lower parts are profiled in the same way in accordance with the shape of the profile body to be pressed.
Das nicht steigfähige Gemisch besteht meist aus lignozellulosehaltigen Faserstoffen, wie zerkleinerten und getrockneten Holzspänen, Bagassefasern u. ä., die mit einem wärmehärtenden Kunstharz, wie einem Melamin-Harnstofformaldehydoder Phenolformaldehydharz vermischt sind. Anstelle der zerkleinerten und getrockneten Holz-oder Bagassefasern können aber auch Fasern anderer Werkstoffe, wie Glasfasern, Steinwolle oder Asbestfasern, allein oder mehrere derselben miteinander gemischt, verwendet werden, denen entsprechende, vorzugsweise organische, Bindemittel zugesetzt sind.The non-rising mixture usually consists of lignocellulosic fibrous materials, such as shredded and dried wood shavings, bagasse fibers and the like. Ä., which are mixed with a thermosetting synthetic resin, such as a melamine-urea formaldehyde or phenol formaldehyde resin. Instead of the shredded and dried wood or bagasse fibers, fibers of other materials, such as glass fibers, rock wool or asbestos fibers, alone or several of them mixed with one another, to which appropriate, preferably organic, binders have been added can also be used.
Die Deckschicht besteht meist aus wenigstens zwei Schichten, nämlich einer Dekorschicht, beispielsweise aus einem Gewebe, einem Furnier, einer bedruckten Papierfolie oder einer Kunststoffolie, über der eine transparente Schutzschicht angeordnet ist. Als Schutzschicht wird meist sogenanntes klares Overlay-Papier, bestehend aus nicht gefülltem Alpha-Zellulosepapier oder Glasfaservlies, das mit einem Duroplast, meist auf Melaminbasis, getränkt ist, verwendet. Die transparente Schutzschicht kann auch dadurch erzeugt werden, daß die Dekorschicht eine stärkere Harzschicht besitzt.The cover layer usually consists of at least two layers, namely a decorative layer, for example a woven fabric, a veneer, a printed paper film or a plastic film, over which a transparent protective layer is arranged. So-called clear overlay paper, consisting of unfilled alpha cellulose paper or glass fiber fleece, which is impregnated with a thermoset, usually based on melamine, is usually used as a protective layer. The transparent protective layer can also be produced in that the decorative layer has a stronger resin layer.
Die bekannte Vorrichtung hat sich bei der Herstellung von gepreßten, mit einer dekorativen Schicht versehenen Profilkörpern der unterschiedlichsten Art bestens bewährt. Es ist jedoch beobachtet worden, daß bei manchen Profilkörpern, insbesondere bei solchen Profilkörpern, bei denen die Unterseite und die Außenstirnfläche nahezu rechtwinklig aneinanderstoßen, die Unterseitenbeschichtung nahe dieser Kante Abrisse aufwies. Diese Erscheinung ist nicht nur ein Schönheitsfehler des Profilkörpers sondern auch ein technischer Fehler, weil die Hüllschicht den Profilkörper vollständig umhüllen und seine Witterungsbeständigkeit verbessern soll.The known device has proven itself very well in the production of pressed profile bodies of the most varied types provided with a decorative layer. However, it has been observed that with some profiled bodies, in particular those profiled bodies in which the underside and the outer end face abut one another almost at right angles, the underside coating had tears near this edge. This appearance is not only a cosmetic flaw in the profile body but also a technical flaw, because the covering layer is intended to completely envelop the profile body and improve its weather resistance.
Der Anmeldung liegt die Aufgabe zugrunde, die Vorrichtung zur Herstellung der Profilkörper derart zu verbessern, daß die Unterseitenbeschichtung des Profilkörpers an der Außenkante der Unterseite nicht mehr reißt.The object of the application is to improve the device for producing the profile body in such a way that the underside coating of the profile body no longer tears on the outer edge of the underside.
Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß die der waagerechten Unterseite zugeordnete Preßfläche des Unterteils der Kaltpresse im Bereich der äußeren Kante bezüglich der waagerechten Unterseite nach oben gekrümmt ist.This object is achieved in that the pressing surface assigned to the horizontal underside of the lower part of the cold press is curved upward in the region of the outer edge with respect to the horizontal underside.
Ein Ausführungsbeispiel der Erfindung ist nachstehend anhand der Figuren 1 bis 4 näher erläutert. Es zeigen :
- Fig. 1 den Querschnitt eines fertig gepreßten Profilkörpers an seinern äußeren Rand,
- Fig. 2 einen Ausschnitt aus dem Querschnitt des Preßwerkzeuges zur Herstellung des Vorpreßlings,
- Fig. 3 den Querschnitt des Vorpreßlings und
- Fig. 4 einen Ausschnitt aus dem Querschnitt des Preßwerkzeuges zum Heißpressen des Profilkörpers.
- 1 shows the cross section of a finished pressed profile body on its outer edge,
- 2 shows a detail from the cross section of the pressing tool for producing the pre-compact,
- Fig. 3 shows the cross section of the preform and
- Fig. 4 shows a detail from the cross section of the pressing tool for hot pressing the profile body.
Der in Fig. 1 gezeigte Querschnitt des Profilkörpers, bei dem es sich beispielsweise um eine Tischplatte handeln kann weist eine äußere Kante auf, bei der die Flächen 1 und 2 nahezu rechtwinklig aneinanderstoßen.The cross section of the profile body shown in FIG. 1, which can be, for example, a table top, has an outer edge in which the
Fig. 2 zeigt die Kaltpresse zur Herstellung des Vorpreßlings. Diese besteht aus dern Oberteil 3 und dem Unterteil 4. Das Unterteil 4 ist an seinem äußeren Rand, das ist der Teil, welcher auch den äußeren Rand des Vorpreßlings preßt, mit der nach oben gerichteten Krümmung 5 versehen.Fig. 2 shows the cold press for the production of the pre-compact. This consists of the
Der mit einer solchen Presse hergestellte Vorpreßling ist in Fig. 3 verdeutlicht. Er weist im Bereich der Fläche 21 eine nach oben gerichtete Krümmung auf.The prepress produced with such a press is illustrated in FIG. 3. It has an upward curvature in the area of
Dieser Vorpreßling wird in eine ebenfalls aus einem Oberteil 6 und einem Unterteil 7 bestehende Heißpresse eingesetzt, nachdem die später die Deckschicht auf der Unterseite des Profilkörpers bildende Folie 8 in das Unterteil 7 eingelegt worden ist. Wenn nun zum Heißpressen des Profilkörpers das Oberteil 6 auf das Unterteil 7 zu bewegt wird, dann wird die untere äußere Randfläche des Vorpreßlings nicht schlagartig gegen die Folie 8 gepreßt, wobei diese ungleichmäßig festgeklemmt am Fließen gehindert werden und daher reißen kann. Vielmehr wird die äußere. Randfläche des Vorpreßlings nach und nach an die Folie gedrückt und gestattet somit eine kontinuierliche Berührung und Verbindung von Folie und Vorpreßling. Dadurch werden Risse in der Folie zuverlässig vermieden.This preform is inserted into a hot press, which also consists of an
Der Vollständigkeit wegen sei darauf hingewiesen, daß die in den Figuren 1 bis 4 die Volumina bzw. die Dicken der Preßkörper oder Preßwerkzeuge nicht maßstabsgerecht gezeichnet sind. Der fertig gepreßte Profilkörper hat in Wirklichkeit ein um 10 bis 50% geringeres Volumen als der Vorpreßling.For the sake of completeness, it should be pointed out that the volumes or the thicknesses of the pressing bodies or pressing tools in FIGS. 1 to 4 are not drawn to scale. The finished pressed profile body is actually 10 to 50% smaller in volume than the pre-pressed part.
Claims (1)
- A device for the manufacture of pressed profiled bodies coated at least on their undersides, which undersides extend horizontally within the area of the outer edge, from a non-ascending mixture. with said device consisting of an upper cold-pressing tool part (3) and of a lower cold-pressing tool part (4) for manufacturing a rough pressed block, and of upper and lower hot-pressing tool parts, characterized in that the pressing surface of said lower cold-pressing tool part (4) as associated with said horizontally extending underside is bent upwardly compared to said horizontally extending underside within the area of said outer edge.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP83106760A EP0134250B1 (en) | 1983-07-09 | 1983-07-09 | Apparatus for manufacturing pressed shaped articles |
| DE8383106760T DE3374997D1 (en) | 1983-07-09 | 1983-07-09 | Apparatus for manufacturing pressed shaped articles |
| AT83106760T ATE31504T1 (en) | 1983-07-09 | 1983-07-09 | DEVICE FOR PRODUCTION OF PRESSED PROFILE BODY. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP83106760A EP0134250B1 (en) | 1983-07-09 | 1983-07-09 | Apparatus for manufacturing pressed shaped articles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0134250A1 EP0134250A1 (en) | 1985-03-20 |
| EP0134250B1 true EP0134250B1 (en) | 1987-12-23 |
Family
ID=8190567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83106760A Expired EP0134250B1 (en) | 1983-07-09 | 1983-07-09 | Apparatus for manufacturing pressed shaped articles |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0134250B1 (en) |
| AT (1) | ATE31504T1 (en) |
| DE (1) | DE3374997D1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2214857B (en) * | 1988-02-05 | 1992-05-13 | Agrifibre Dev Ltd | Compositions and manufacture of structural members, in particular furniture components |
| CH692844A5 (en) * | 2001-05-09 | 2002-11-29 | Markus Bard | Chipboard. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1210551B (en) * | 1959-09-23 | 1966-02-10 | Werz Furnier Sperrholz | Process for the production and coating of chipboard parts |
| GB990351A (en) * | 1963-07-31 | 1965-04-28 | Formwood Ltd | Method and apparatus for producing pressure-moulded articles from chip board or like material |
| DE2548739C3 (en) * | 1975-10-31 | 1978-09-21 | Furnier- Und Sperrholzwerk J.F. Werz Jr. Kg Werzalit-Pressholzwerk, 7141 Oberstenfeld | Process for the production of pressed profile bodies from a non-climbing mixture t |
-
1983
- 1983-07-09 DE DE8383106760T patent/DE3374997D1/en not_active Expired
- 1983-07-09 EP EP83106760A patent/EP0134250B1/en not_active Expired
- 1983-07-09 AT AT83106760T patent/ATE31504T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3374997D1 (en) | 1988-02-04 |
| EP0134250A1 (en) | 1985-03-20 |
| ATE31504T1 (en) | 1988-01-15 |
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