EP0197255B1 - Method for the production of a pressed profiled body - Google Patents

Method for the production of a pressed profiled body Download PDF

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Publication number
EP0197255B1
EP0197255B1 EP86101495A EP86101495A EP0197255B1 EP 0197255 B1 EP0197255 B1 EP 0197255B1 EP 86101495 A EP86101495 A EP 86101495A EP 86101495 A EP86101495 A EP 86101495A EP 0197255 B1 EP0197255 B1 EP 0197255B1
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EP
European Patent Office
Prior art keywords
mixture
pressed
press
pressing tool
webs
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
Application number
EP86101495A
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German (de)
French (fr)
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EP0197255A1 (en
Inventor
Edmund Munk
Hermann Henke
Original Assignee
Werzalit - Werke Jf Werz KG
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Publication date
Application filed by Werzalit - Werke Jf Werz KG filed Critical Werzalit - Werke Jf Werz KG
Priority to AT86101495T priority Critical patent/ATE69193T1/en
Publication of EP0197255A1 publication Critical patent/EP0197255A1/en
Application granted granted Critical
Publication of EP0197255B1 publication Critical patent/EP0197255B1/en
Anticipated expiration legal-status Critical
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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
    • B27N5/00—Manufacture of non-flat articles
    • B27N5/02—Hollow articles

Definitions

  • the invention relates to a device for producing molded parts from a non-rising mixture of lignocellulose-containing particles and a binder with a lower press part serving to hold the mixture to be pressed, with a substantially horizontal base and vertical side surfaces and an upper press part with one under Angle to the vertical side surface.
  • Such a device is known (DE - B - 2 035 053).
  • This known device is created for the production of such molded parts in which one or more surfaces connect at a steep angle to a horizontal or approximately horizontal surface.
  • Such molded parts are, for example, the cup-shaped hollow feet of such pallets, which are pressed in one piece from a non-rising mixture.
  • the known device has a press tool lower part which receives the mixture to be pressed, in which a bevel provided with a multiplicity of small steps adjoins a horizontal base area. If the hollow foot to be pressed is to have an edge at the upper end, then a horizontal and a vertical surface follows at the upper end of the slope.
  • the non-rising mixture usually consists of lignocellulosic fibrous materials, such as shredded and dried wood chips, 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 molding is pressed in such a way that the lower part of the pressing tool is evenly filled with a certain amount of the mixture up to a certain height.
  • the fill level is approximately two to seven times the thickness of the molded part. If the molded part is one that should not be provided with a decorative surface, then it is pressed in one operation and cured by the application of heat. If the molded part is provided with a decorative surface, a pre-compact is first produced from the mixture in a first pressing process and is compacted almost to the final volume of the molded part. This pre-compact is then removed from the pre-press, placed together with decorative surface coatings in another press and finished pressed therein.
  • the technical problem on which the invention is based is to further develop the device described at the outset in such a way that very strongly structured molded parts can be produced using a press consisting only of the lower part of the pressing tool and the upper part of the pressing tool.
  • Such a molded part is, for example, a square or rectangular lattice grid - ceiling element, which consists of crosswise arranged and merging profile webs, the profile webs having a very strongly structured cross section, which for example consists of a uniform square, rectangular or trapezoidal base and one or more on one There are webs attached to the base.
  • Fig. 1 shows the cross section of the object which is to be pressed in the simplest possible way from the mixture described above.
  • This cross section has a rectangular base 1, which is continued on the sides of the surface in webs 2.
  • this disadvantage is eliminated in that the profile body is pressed in a press tool lower part 3 according to FIG. 3.
  • the pressing tool lower part 3 according to FIG. 3 differs from the pressing tool lower part 3 according to FIG. 2 in that the steps 7 narrowing the filling space in this area are arranged on its bottom. These steps 7 have a similar shape to the webs 2. If these steps 7 are arranged in the press tool lower part 3, this can even be provided with the mixture filling 5 at a uniform height, as can be seen from FIG. 3.
  • the step or the steps 7 in the lower part of the press tool have the effect that a sufficient amount of the mixture is held in the area of the webs 2 to be pressed, so that the finished webs 2 have a sufficient density.
  • Fig. 3 in which the upper final dimension 10 of the finished profile body is shown in dashed lines.
  • the profile body is now pressed from the mixture filling 5 by lowering the pressing tool upper part 4, a profile body with the cross section according to FIG. 4 is produced.
  • this profile body has the distinctive webs 2, only the base 1 has two undercuts 8 which, however, do not affect the profile body in any way. Rather, the webs 2 now also have the same density and mechanical properties as the base 1.
  • the underside of the base 1 of the profile body can also be provided with depressions, for example channel-like depressions.
  • FIGS. 5 and 6 show an application example for a profile body produced according to the invention.
  • 5 shows the longitudinal section through half of a lattice grid ceiling element.
  • this lattice grid ceiling element which consists of a plurality of cross-shaped profiles 9, the cross section of the profiles 9 contains a block-shaped base 1 and at least one web 2.
  • the profile body has sharp edges. According to the invention, however, the same profile bodies can also be produced with rounded edges.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Finishing Walls (AREA)
  • Floor Finish (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The process is for producing highly structured sectional bodies, for example of a latticed ceiling element, from a non-rising mixture, such as a mixture of fibres containing lignocellulose and of a heat-setting synthetic resin. The mixture is introduced into a press-die bottom part equipped with a least one step narrowing the filling space and is pressed to completion by a press-die top part having the contour of the sectional body. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Herstellung von Formteilen aus einem nicht steigfähigen Gemisch von lignozellulosehaltigen Teilchen und einem Bindemittel mit einem, der Aufnahme des zu verpressenden Gemischs dienenden unteren Pressenteils mit einer im wesentlichen horizontal verlaufenden Grundfläche und senkrechten Seitenflächen und einem oberen Pressenteil mit einer unter einem Winkel zur Vertikalen verlaufenden Seitenfläche.The invention relates to a device for producing molded parts from a non-rising mixture of lignocellulose-containing particles and a binder with a lower press part serving to hold the mixture to be pressed, with a substantially horizontal base and vertical side surfaces and an upper press part with one under Angle to the vertical side surface.

Eine solche Vorrichtung ist bekannt ( DE - B - 2 035 053 ). Diese bekannte Vorrichtung ist für die Herstellung solcher Formteile geschaffen, bei denen eine oder mehrere Flächen unter einem steilen Winkel an eine waagerechte oder angenähert waagerechte Fläche anschließen. Solche Formteile sind beispielsweise die topfförmigen Hohlfüße von solchen Paletten, die einstückig aus einem nicht steigfähigen Gemisch gepreßt sind.Such a device is known (DE - B - 2 035 053). This known device is created for the production of such molded parts in which one or more surfaces connect at a steep angle to a horizontal or approximately horizontal surface. Such molded parts are, for example, the cup-shaped hollow feet of such pallets, which are pressed in one piece from a non-rising mixture.

Die bekannte Vorrichtung besitzt ein das zu pressende Gemisch aufnehmendes Preßwerkzeugunterteil, bei dem sich an eine horizontale Grundfläche eine, mit einer Vielzahl von kleinen Stufen versehene Schräge anschließt. Wenn der zu pressende Hohlfuß am oberen Ende einen Rand erhalten soll, dann schließt sich am oberen Ende der Schräge eine horizontale und eine senkrechte Fläche an.The known device has a press tool lower part which receives the mixture to be pressed, in which a bevel provided with a multiplicity of small steps adjoins a horizontal base area. If the hollow foot to be pressed is to have an edge at the upper end, then a horizontal and a vertical surface follows at the upper end of the slope.

Das nicht steigfähige Gemisch besteht meist aus lignozellulosehaltigen Faserstoffen, wie zerkleinerten und getrockneten Holzspänen, Bagassefasern u.ä., die mit einem wärmehärtbaren Kunstharz, wie einem Melamin-Harnstofformaldehyd- oder 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 chips, bagasse fibers and the like, 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.

Das Pressen des Formteils erfolgt in der Weise, daß das Preßwerkzeugunterteil bis zu einer bestimmten Höhe gleichmäßig mit einer bestimmten Menge des Gemisches gefüllt wird. Die Füllhöhe beträgt etwa das Zwei- bis Siebenfache der Stärke des Formteils. Wenn es sich bei dem Formteil um ein solches handelt, das nicht mit einer dekorativen Oberfläche versehen werden soll, dann wird es in einem Arbeitsgang gepreßt und durch Wärmezufuhr ausgehärtet. Wenn das Formteil mit einer dekorativen Oberfläche versehen wird, dann wird zunächst in einem ersten Preßvorgang aus dem Gemisch ein Vorpreßling hergestellt, der schon fast bis auf das endgültige Volumen des Formteils verdichtet ist. Dieser Vorpreßling wird dann aus der Vorpresse entnommen, zusammen mit dekorativen Oberflächenbeschichtungen in eine andere Presse eingelegt und darin fertiggepreßt.The molding is pressed in such a way that the lower part of the pressing tool is evenly filled with a certain amount of the mixture up to a certain height. The fill level is approximately two to seven times the thickness of the molded part. If the molded part is one that should not be provided with a decorative surface, then it is pressed in one operation and cured by the application of heat. If the molded part is provided with a decorative surface, a pre-compact is first produced from the mixture in a first pressing process and is compacted almost to the final volume of the molded part. This pre-compact is then removed from the pre-press, placed together with decorative surface coatings in another press and finished pressed therein.

Das der Erfindung zugrunde liegende technische Problem besteht darin, die eingangs bezeichnete Vorrichtung in der Weise weiter zu entwickeln, daß sehr stark strukturierte Formteile mit einer nur aus Preßwerkzeugunterteil und Preßwerkzeugoberteil bestehenden Presse hergestellt werden können.The technical problem on which the invention is based is to further develop the device described at the outset in such a way that very strongly structured molded parts can be produced using a press consisting only of the lower part of the pressing tool and the upper part of the pressing tool.

Ein solches Formteil ist beispielsweise ein quadratisches oder rechteckiges Gitterraster - Deckenelement, das aus kreuzweise angeordneten und ineinander übergehenden Profilstegen besteht, wobei die Profilstege einen sehr stark strukturierten Querschnitt besitzen, welcher beispielsweise aus einer gleichmäßigen quadratischen, rechteckigen oder trapezförmigen Basis und einem oder mehreren an einer Seite der Basis angesetzten Stegen besteht.Such a molded part is, for example, a square or rectangular lattice grid - ceiling element, which consists of crosswise arranged and merging profile webs, the profile webs having a very strongly structured cross section, which for example consists of a uniform square, rectangular or trapezoidal base and one or more on one There are webs attached to the base.

Dieses Problem ist erfindungsgemäß dadurch gelöst, daß sich zwischen der Grundfläche und jeweils einer der senkrechten Seitenflächen lediglich eine den Füllraum verengende Stufe angeordnet ist.This problem is solved according to the invention in that only one step narrowing the filling space is arranged between the base area and one of the vertical side faces.

Die Erfindung ist nachstehend anhand der Figuren 1 bis 6 näher erläutert. Es zeigen :

Fig. 1
schematisch den Querschnitt des zu pressenden Gegenstandes,
Fig. 2
schematisch den Querschnitt eines bekannten Preßwerkzeuges,
Fig. 3
schematisch den Querschnitt des Preßwerkzeuges gemäß der Erfindung,
Fig. 4
schematisch den Querschnitt des mit dem Preßwerkzeug gemäß Fig. 3 gepreßten Gegenstandes,
Fig. 5
den Längschnitt durch die Hälfte eines Gitterraster - Deckenelementes, welches gemäß der Erfindung gepreßt ist
und
Fig. 6
einen Ausschnitt aus Fig. 5.
The invention is explained in more detail below with reference to FIGS. 1 to 6. Show it :
Fig. 1
schematically the cross section of the object to be pressed,
Fig. 2
schematically the cross section of a known press tool,
Fig. 3
schematically the cross section of the pressing tool according to the invention,
Fig. 4
3 shows schematically the cross section of the object pressed with the pressing tool according to FIG. 3,
Fig. 5
the longitudinal section through half of a lattice grid - ceiling element, which is pressed according to the invention
and
Fig. 6
a section from FIG. 5.

Fig. 1 zeigt den Querschnitt des Gegenstandes, der auf möglichst einfache Weise aus dem eingangs beschriebenen Gemisch gepreßt werden soll. Dieser Querschnitt besitzt eine rechteckige Basis 1, welche sich an den Seiten der Oberfläche in Stegen 2 fortsetzt.Fig. 1 shows the cross section of the object which is to be pressed in the simplest possible way from the mixture described above. This cross section has a rectangular base 1, which is continued on the sides of the surface in webs 2.

Wenn man einen solchen Gegenstand in bekannter Weise in einer aus Preßwerkzeugunterteil 3 und Preßwerkzeugoberteil 4 gemäß Fig. 2 pressen wollte, dann müßte das zu pressende Gemisch in fünf- bis siebenfacher Stärke des fertigen Gegenstandes in das Preßwerkzeugunterteil eingefüllt werden. In Fig. 2 ist die Gemischfüllung 5 eingezeichnet, welche der fünffachen Stärke des fertigen Gegenstandes entspricht. Wie aus Fig. 2 erkennbar, ist es schon nicht ganz einfach, eine solche Füllung des Preßwerkzeugunterteils durchzuführen. Schwierig wird es aber erst recht, wenn aus dieser Gemischfüllung 5 durch Absenken des Preßwerkzeugoberteils 4 senkrecht nach unten der Profilkörper gepreßt werden soll. Dabei fallen die Teile 6 der Gemischfüllung, aus welchen beim Profilkörper die Stege 2 entstehen sollen, nach innen. Das hat zur Folge, daß in dem fertig gepreßten Profilkörper die Stege 2 eine zu geringe Verdichtung aufweisen. Sie enthalten nicht die erforderliche Werkstoffmenge und ihre Festigkeit ist unzureichend.If one wanted to press such an object in a known manner in a press tool lower part 3 and press tool upper part 4 according to FIG. 2, then this would have to be pressed Mix in five to seven times the thickness of the finished object in the press tool lower part. In Fig. 2, the mixture filling 5 is shown, which corresponds to five times the thickness of the finished object. As can be seen from Fig. 2, it is not very easy to carry out such a filling of the press tool lower part. But it becomes even more difficult if the profile body is to be pressed from this mixture filling 5 by lowering the pressing tool upper part 4 vertically downwards. The parts 6 of the mixture filling, from which the webs 2 are to be formed in the profile body, fall inwards. The result of this is that the webs 2 have too little compression in the finished pressed profile body. They do not contain the required amount of material and their strength is insufficient.

Gemäß der Erfindung wird dieser Nachteil dadurch behoben, daß der Profilkörper in einem Preßwerkzeugunterteil 3 gemäß Fig. 3 gepreßt wird. Das Preßwerkzeugunterteil 3 gemäß Fig. 3 unterscheidet sich von dem Preßwerkzeugunterteil 3 gemäß Fig. 2 dadurch, daß an seinem Boden die den Füllraum in diesem Bereich verengenden Stufen 7 angeordnet sind. Diese Stufen 7 haben eine ähnliche Gestalt wie die Stege 2. Wenn diese Stufen 7 in dem Preßwerkzeugunterteil 3 angeordnet sind, dann kann dieses sogar in gleichmäßiger Höhe mit der Gemischfüllung 5 versehen werden, wie dies aus Fig. 3 ersichtlich ist.According to the invention, this disadvantage is eliminated in that the profile body is pressed in a press tool lower part 3 according to FIG. 3. The pressing tool lower part 3 according to FIG. 3 differs from the pressing tool lower part 3 according to FIG. 2 in that the steps 7 narrowing the filling space in this area are arranged on its bottom. These steps 7 have a similar shape to the webs 2. If these steps 7 are arranged in the press tool lower part 3, this can even be provided with the mixture filling 5 at a uniform height, as can be seen from FIG. 3.

Die Stufe bzw. die Stufen 7 im Preßwerkzeugunterteil haben die Wirkung, daß eine ausreichende Menge des Gemisches im Bereich der zu pressenden Stege 2 festgehalten wird, so daß die fertigen Stege 2 eine ausreichende Dichte besitzen. Dies wird aus Fig. 3 verständlich, in welcher das obere Endmaß 10 des fertigen Profilkörpers strichliert eingezeichnet ist.The step or the steps 7 in the lower part of the press tool have the effect that a sufficient amount of the mixture is held in the area of the webs 2 to be pressed, so that the finished webs 2 have a sufficient density. This can be understood from Fig. 3, in which the upper final dimension 10 of the finished profile body is shown in dashed lines.

Wenn aus der Gemischfüllung 5 nun durch Absenken des Preßwerkzeugoberteils 4 der Profilkörper gepreßt wird, dann entsteht ein Profilkörper mit dem Querschnitt gemäß Fig. 4. Dieser Profilkörper weist, wie gewünscht, die ausgeprägten Stege 2 auf, lediglich die Basis 1 hat zwei Hinterschneidungen 8 bekommen, welche jedoch den Profilkörper in keiner Weise beeinträchtigen. Vielmehr besitzen jetzt auch die Stege 2 die gleiche Dichte und mechanischen Eigenschaften wie die Basis 1. Die Unterseite der Basis 1 der Profilkörpers kann auch noch mit Vertiefungen, beispielsweise rinnenartigen Vertiefungen, versehen sein.If the profile body is now pressed from the mixture filling 5 by lowering the pressing tool upper part 4, a profile body with the cross section according to FIG. 4 is produced. As desired, this profile body has the distinctive webs 2, only the base 1 has two undercuts 8 which, however, do not affect the profile body in any way. Rather, the webs 2 now also have the same density and mechanical properties as the base 1. The underside of the base 1 of the profile body can also be provided with depressions, for example channel-like depressions.

Die Figuren 5 und 6 zeigen ein Anwendungsbeispiel für einen gemäß der Erfindung hergestellten Profilkörper. In Fig. 5 ist der Längsschnitt durch die Hälfte eines Gitterraster-Deckenelementes verdeutlicht. Bei diesem Gitterraster-Deckenelement, das aus einer Mehrzahl von kreuzförmig angeordneten Profilen 9 besteht, enthält der Querschnitt der Profile 9 eine blockförmige Basis 1 und wenigstens einen Steg 2. Bei dem in den Figuren 5 und 6 gezeigten Ausführungsbeispiel besitzt der Profilkörper scharfe Kanten. Gemäß der Erfindung können aber die gleichen Profilkörper auch mit abgerundeten Kanten hergestellt werden.FIGS. 5 and 6 show an application example for a profile body produced according to the invention. 5 shows the longitudinal section through half of a lattice grid ceiling element. In this lattice grid ceiling element, which consists of a plurality of cross-shaped profiles 9, the cross section of the profiles 9 contains a block-shaped base 1 and at least one web 2. In the embodiment shown in FIGS. 5 and 6, the profile body has sharp edges. According to the invention, however, the same profile bodies can also be produced with rounded edges.

Claims (1)

  1. Device for the manufacture of moulded parts compressed from a non-ascending mixture of lignocellulose-containing particles mixed a binding agent, comprising the lower part of a pressing tool which serves to take up said mixture to be compressed, having a basal surface extending essentially in the horizontal direction, with the upper part of said pressing tool having a side face extending at an angle in relation to the vertical line,

    characterized in that a step or set-off ( 7 ) which merely serves to constrict the volume of the filling space, is disposed between said basal surface area and one of the vertical side faces respectively.
EP86101495A 1985-04-10 1986-02-05 Method for the production of a pressed profiled body Expired - Lifetime EP0197255B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86101495T ATE69193T1 (en) 1985-04-10 1986-02-05 PROCESS FOR MANUFACTURING A PRESSED PROFILE BODY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72218685A 1985-04-10 1985-04-10
US722186 1985-04-10

Publications (2)

Publication Number Publication Date
EP0197255A1 EP0197255A1 (en) 1986-10-15
EP0197255B1 true EP0197255B1 (en) 1991-11-06

Family

ID=24900823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101495A Expired - Lifetime EP0197255B1 (en) 1985-04-10 1986-02-05 Method for the production of a pressed profiled body

Country Status (5)

Country Link
EP (1) EP0197255B1 (en)
JP (1) JPS61237602A (en)
AT (1) ATE69193T1 (en)
CA (1) CA1266755A (en)
DE (1) DE3682308D1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759351A (en) * 1970-07-15 1971-04-30 Werz Furnier Sperrholz METHOD AND DEVICE USED TO PRESS A PARTICLE MOLDED IN LIGNOCELLULOSE GLUED PARTICLES
DE2217792C3 (en) * 1972-04-13 1979-07-19 Furnier- Und Sperrholzwerk J.F. Werz Jr. Kg Werzalit-Pressholzwerk, 7141 Oberstenfeld Press for the production of molded parts
JPS5214782U (en) * 1976-06-29 1977-02-02
US4440708A (en) * 1978-12-21 1984-04-03 Board Of Control Of Michigan Technological University Method for molding articles having non-planar portions from matted wood flakes

Also Published As

Publication number Publication date
ATE69193T1 (en) 1991-11-15
EP0197255A1 (en) 1986-10-15
CA1266755A (en) 1990-03-20
DE3682308D1 (en) 1991-12-12
JPS61237602A (en) 1986-10-22

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