EP2319684A2 - Press moulding apparatus for shaping of veneer layers wood material - Google Patents

Press moulding apparatus for shaping of veneer layers wood material Download PDF

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Publication number
EP2319684A2
EP2319684A2 EP10014244A EP10014244A EP2319684A2 EP 2319684 A2 EP2319684 A2 EP 2319684A2 EP 10014244 A EP10014244 A EP 10014244A EP 10014244 A EP10014244 A EP 10014244A EP 2319684 A2 EP2319684 A2 EP 2319684A2
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EP
European Patent Office
Prior art keywords
veneer layers
mold
heating
press
molding part
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.)
Withdrawn
Application number
EP10014244A
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German (de)
French (fr)
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EP2319684A3 (en
Inventor
Henning Rambow
Maximilian Trappe
Lars Ehlers
Jürgen Wenge
Martin Hegenbarth
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2319684A2 publication Critical patent/EP2319684A2/en
Publication of EP2319684A3 publication Critical patent/EP2319684A3/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
    • B27D1/083—Presses specially designed for making the manufacture of shaped plywood articles
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/007—Heaters using a particular layout for the resistive material or resistive elements using multiple electrically connected resistive elements or resistive zones

Definitions

  • the invention relates to a mold for the transformation of wood materials from veneer layers, are deformed with the inexpensive press material from plywood and plywood using heat-activated adhesive under the action of pressure and heat.
  • the mold can be used in conjunction with conventional compression molding.
  • molds For the production of components made of wood veneer layers but also plywood and plywood are heated molds are used, which are connected in compression molding by pressure and heat.
  • Known molds are made of aluminum or other primarily metallic materials. They contain channels for the passage of heating fluids or are electrically heated. Due to the heating during the pressing process, the heat-activatable adhesives such as urea-formaldehyde resins with built-hardeners combine with the wood veneer layers and at the same time obtain the required shape.
  • a membrane molding press is known, with which the profiled surfaces of a plate-shaped workpiece are coated with veneer or a thermoformable coating material under pressure and temperature.
  • a heater for heating the press membrane to the required coating temperature a flexible heating mat is used.
  • a membrane molding press for coating the profiled surface of a plate-shaped material of veneer or a coating material is in the DE 4112607 described.
  • the plate-shaped workpiece is sucked to the fitting from below with vacuum and pressed from above with heating.
  • These molds are very complex and expensive to design and manufacture. Their manufacture is not possible by most woodworking companies themselves and must be outsourced. The production of the molds is only worthwhile for larger series of plywood products. The introduction of heat away from the press surface often proves to be unfavorable in practice. The necessary for heating electrical voltage is above the maximum contact voltage and also requires special health and safety precautions.
  • the object of the invention is to provide a mold for the transformation of wood materials from veneer layers, with the smaller series and individual pieces can be produced inexpensively and with high accuracy.
  • the mold should be used in the usual compression molding.
  • An essential feature is the wooden press mold used, consisting of a press die male and a die die in conjunction with a plate-shaped heating material, for example a metal fabric, a heating foil or a coated carrier fabric. Depending on the desired shape of the component, the surface of the wood mold is curved one or more times.
  • the heating of the material to be deformed by inserting the heating material between the press die and the material to be deformed.
  • the heating material has a deformability similar to the material to be deformed. It can be introduced both on the material to be deformed between Pressgesenk and material to be deformed and between the layers of the material to be deformed in multilayer structure.
  • the heating material is cut to the desired size and then inserted in the manner described.
  • heat is generated in the heating material, which is delivered to the veneer stack during pressing.
  • the heating activates the adhesive introduced between the veneer layers or with which the veneer layers are coated.
  • the veneers are glued together and fixed in the desired 3D shape.
  • the inventive mold is associated with a number of advantages. There are no longer expensive, heated metal molds required.
  • the wood forms are inexpensive and can be produced with existing technical equipment and known technologies in the woodworking companies.
  • the elaborate heating of the mold can be avoided by the use of the heating material, which is in direct contact with the press material to be heated.
  • sufficiently high temperatures can be carried out with DC currents below the maximum contact voltage of 120V and with AC currents below the maximum contact voltage of 50V, so that no special electrical safety conditions are met Need to become.
  • With the mold for example, three-dimensionally shaped wall panels with and without heatability can be produced inexpensively.
  • FIG. 1 a Pressgesenke with pickled fuel on the bottom and top of the press dies and in FIG. 2 a Pressgesenke with pickled fuel in the middle of the pressed material.
  • FIG. 1 shows a press dies with male 1 and female die 5 of a wood material with inserted heating material 2 on the outer edge of the male part 1 and heating material 4 on the outer edge of the die 5.
  • the stack of pressed material 3 consisting of veneer layers, ply or plywood arranged.
  • the two-part mold is made from a wood material, for example Multiplex, Medium Density Fiberboard, using a CNC milling machine.
  • a wood material for example Multiplex, Medium Density Fiberboard
  • an electrically conductive fabric or mesh either as a metal fabric, a film or as a coated carrier fabric (hereinafter: heating material) is placed.
  • the pressed material 3 in the form of thin veneer layers is inserted either as ply or as plywood, ie either in the same direction and against each other twisted wood fiber direction.
  • the individual veneer layers have each been coated with a heat-activated adhesive prior to insertion into the two-part mold.
  • the two outer sides of the pressed material 3 are uncoated.
  • a further layer of the heating material 2 is placed on the pressed material 3.
  • the mold is closed and pressed together in a press with pressures from 1 bar.
  • a controllable voltage is applied to the protruding from the mold ends of the heating materials 2 and 4 in order to generate the necessary for the activation of the adhesives temperatures inside the mold.
  • a DC current is applied below the maximum contact voltage of 120V or AC below the maximum contact voltage of 50V.
  • the heating activates the adhesive which has been introduced between the layers of the pressed material 3.
  • the layers are glued together and fixed in the desired 3D shape.
  • FIG. 2 shows a press dies with male 1 and 5 die from a wood material with inserted heating material 3 in the center of the pressed material consisting of an upper layer 2 and a lower layer 4.
  • the heating material 3 By inserting the heating material 3 between the layers of the pressed material on the one hand, the adhesive is heated and on the other hand permanently heated material to be pressed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)

Abstract

The apparatus has a male molding part (1) and a female molding part (5) made of wooden materials, where plate-shaped electrically heatable heating materials (2, 4) are arranged at external edges of the male molding part and the female molding part. A stack of pressing goods (3) is arranged between the heating materials, where the pressing goods are in the form of thin veneer layers. The veneer layers are coated with heat activated adhesive, where the apparatus is closed and pressed with pressure of less than 1 bar.

Description

Die Erfindung betrifft eine Pressform für die Umformung von Holzwerkstoffen aus Furnierlagen, mit der kostengünstig Pressmaterial aus Lagen- und Sperrhölzern unter Verwendung von wärmeaktivierbaren Klebstoff unter Einwirkung von Druck und Wärme verformt werden. Die Pressform ist in Verbindung mit üblichen Formpressen einsetzbar.The invention relates to a mold for the transformation of wood materials from veneer layers, are deformed with the inexpensive press material from plywood and plywood using heat-activated adhesive under the action of pressure and heat. The mold can be used in conjunction with conventional compression molding.

Zur Herstellung von Bauteilen aus Holzfurnierlagen aber auch Lagen- und Sperrhölzern kommen beheizbare Pressformen zum Einsatz, die in Formpressen durch Druck- und Wärmeeinwirkung verbunden werden. Bekannte Pressformen werden aus Aluminium oder anderen vornehmlich metallischen Materialien gefertigt. Sie enthalten Kanäle zur Durchleitung von Heizflüssigkeiten oder sind elektrisch beheizbar. Durch die Erwärmung während des Pressvorganges verbinden sich die wärmeaktivierbaren Klebstoffe wie Harnstoff-FormaldehydHarze mit eingebauten Härtern mit den Holzfurnierlagen und erhalten gleichzeitig die erforderliche Form. Aus der DE 3935562 ist eine Membran-Formpresse bekannt, mit der profilierte Oberflächen eines plattenförmigen Werkstücks mit Furnier oder einem tiefziehfähigen Beschichtungsmaterial unter Druck und Temperatur beschichtet werden. Als Heizung zum Aufheizen der Pressmembran auf die erforderliche Beschichtungstemperatur wird eine flexible Heizmatte eingesetzt. Ebenfalls eine Membran-Formpresse zur Beschichtung der profilierten Oberfläche eines plattenförmigen Werkstoffs aus Furnier oder einem Beschichtungsmaterial ist in der DE 4112607 beschrieben. Das plattenförmige Werkstück wird an das Formstück von unten mit Vakuum angesaugt und von oben mit Beheizung angepresst. Diese Pressformen sind in Konstruktion und Herstellung sehr aufwändig und teuer. Ihre Anfertigung ist bei den meisten holzverarbeitenden Unternehmen durch diese selbst nicht möglich und muss als Auftrag außer Haus vergeben werden. Die Herstellung der Formen lohnt sich nur für größere Serien von Sperrholzprodukten. Die Einbringung der Wärme abseits der Pressoberfläche erweist sich in der Praxis häufig als unvorteilhaft. Die zum Beheizen notwendige elektrische Spannung liegt oberhalb der maximalen Berührungsspannung und erfordert zusätzlich besondere Arbeitsschutzvorkehrungen.For the production of components made of wood veneer layers but also plywood and plywood are heated molds are used, which are connected in compression molding by pressure and heat. Known molds are made of aluminum or other primarily metallic materials. They contain channels for the passage of heating fluids or are electrically heated. Due to the heating during the pressing process, the heat-activatable adhesives such as urea-formaldehyde resins with built-hardeners combine with the wood veneer layers and at the same time obtain the required shape. From the DE 3935562 For example, a membrane molding press is known, with which the profiled surfaces of a plate-shaped workpiece are coated with veneer or a thermoformable coating material under pressure and temperature. As a heater for heating the press membrane to the required coating temperature, a flexible heating mat is used. Also a membrane molding press for coating the profiled surface of a plate-shaped material of veneer or a coating material is in the DE 4112607 described. The plate-shaped workpiece is sucked to the fitting from below with vacuum and pressed from above with heating. These molds are very complex and expensive to design and manufacture. Their manufacture is not possible by most woodworking companies themselves and must be outsourced. The production of the molds is only worthwhile for larger series of plywood products. The introduction of heat away from the press surface often proves to be unfavorable in practice. The necessary for heating electrical voltage is above the maximum contact voltage and also requires special health and safety precautions.

Die Aufgabe der Erfindung besteht darin, eine Pressform für die Umformung von Holzwerkstoffen aus Furnierlagen zu schaffen, mit der kleinere Serien und Einzelstücke kostengünstig und mit hoher Genauigkeit herstellbar sind. Die Pressform soll in den üblichen Formpressen einsetzbar sein.The object of the invention is to provide a mold for the transformation of wood materials from veneer layers, with the smaller series and individual pieces can be produced inexpensively and with high accuracy. The mold should be used in the usual compression molding.

Die Aufgabe wird erfindungsgemäß durch die im Anspruch 1 ausgeführte Pressform gelöst, die in weiteren Ansprüchen vorteilhaft weiter ausgestaltet wird. Wesentliches Merkmal ist die zum Einsatz kommende Holzpressform bestehend aus einem Pressgesenk Patrize und einem Pressgesenk Matrize in Verbindung mit einem plattenförmigen Heizmaterial, beispielsweise einem Metallgewebe, einer Heizfolie oder einem beschichteten Trägergewebe. In Abhängigkeit von der gewünschten Form des Bauteils ist die Oberfläche der Holzpressform ein- oder mehrfach gekrümmt. Die Beheizung des zu verformenden Materials erfolgt durch das Einlegen des Heizmaterials zwischen das Pressgesenk und das zu verformende Material. Das Heizmaterial weist eine dem zu verformenden Material ähnliche Verformbarkeit auf. Es kann sowohl auf das zu verformende Material zwischen Pressgesenk und zu verformenden Material als auch zwischen die Lagen des zu verformenden Materials bei mehrlagigem Aufbau eingebracht werden. Das Heizmaterial wird in der gewünschten Größe zugeschnitten und dann in der beschriebenen Weise eingelegt. Durch Anschluss an eine elektrische Spannungsquelle wird im Heizmaterial Wärme erzeugt, die beim Pressen an den Furnierstapel abgegeben wird. Die Erwärmung aktiviert den Kleber, der zwischen die Furnierschichten eingebracht ist oder mit dem die Furnierschichten beschichtet sind. Die Furniere werden miteinander verklebt und in der gewünschten 3D-Form fixiert.The object is achieved by the executed in claim 1 mold, which is advantageously designed further in further claims. An essential feature is the wooden press mold used, consisting of a press die male and a die die in conjunction with a plate-shaped heating material, for example a metal fabric, a heating foil or a coated carrier fabric. Depending on the desired shape of the component, the surface of the wood mold is curved one or more times. The heating of the material to be deformed by inserting the heating material between the press die and the material to be deformed. The heating material has a deformability similar to the material to be deformed. It can be introduced both on the material to be deformed between Pressgesenk and material to be deformed and between the layers of the material to be deformed in multilayer structure. The heating material is cut to the desired size and then inserted in the manner described. By connecting to an electrical voltage source heat is generated in the heating material, which is delivered to the veneer stack during pressing. The heating activates the adhesive introduced between the veneer layers or with which the veneer layers are coated. The veneers are glued together and fixed in the desired 3D shape.

Die erfmdungsgemäße Pressform ist mit einer Reihe von Vorteilen verbunden. Es sind keine teuren, beheizbaren Metallformen mehr erforderlich. Die Holzformen sind kostengünstig und mit in den holzverarbeitenden Unternehmen vorhandenen technischen Ausrüstungen und bekannten Technologien herstellbar. Die aufwändige Erhitzung der Pressform kann durch die Verwendung des Heizmaterials vermieden werden, das in direktem Kontakt mit dem zu beheizenden Pressmaterial steht. Abhängig von dem genutzten Heizmaterial können ausreichend hohe Temperaturen mit Gleichströmen unterhalb der maximalen Berührungsspannung von 120V und mit Wechselströmen unterhalb der maximalen Berührungsspannung von 50V ausgeführt werden, so dass keine besonderen elektrotechnischen Sicherheitsbedingungen eingehalten werden müssen. Mit der Pressform lassen sich kostengünstig beispielsweise dreidimensional verformte Wandpaneele mit und ohne Beheizbarkeit herstellen.The inventive mold is associated with a number of advantages. There are no longer expensive, heated metal molds required. The wood forms are inexpensive and can be produced with existing technical equipment and known technologies in the woodworking companies. The elaborate heating of the mold can be avoided by the use of the heating material, which is in direct contact with the press material to be heated. Depending on the heating material used, sufficiently high temperatures can be carried out with DC currents below the maximum contact voltage of 120V and with AC currents below the maximum contact voltage of 50V, so that no special electrical safety conditions are met Need to become. With the mold, for example, three-dimensionally shaped wall panels with and without heatability can be produced inexpensively.

Im folgenden wird die erfindungsgemäße Pressform anhand von Ausführungsbeispielen näher erläutert. Die zugehörigen Abbildungen zeigen in Figur 1 ein Pressgesenke mit eingelegtem Heizmaterial auf Unter- und Oberseite der Pressgesenke und in Figur 2 ein Pressgesenke mit eingelegtem Heizmaterial mittig im Pressgut.In the following the press mold according to the invention will be explained in more detail by means of exemplary embodiments. The accompanying figures show in FIG. 1 a Pressgesenke with pickled fuel on the bottom and top of the press dies and in FIG. 2 a Pressgesenke with pickled fuel in the middle of the pressed material.

Beispiel 1example 1

Die Figur 1 zeigt ein Pressgesenke mit Patrize 1 und Matrize 5 aus einem Holzwerkstoff mit eingelegtem Heizmaterial 2 auf Außenkante der Patrize 1 und Heizmaterial 4 auf Außenkante der Matrize 5. Zwischen Heizmaterial 2 und 4 ist der Stapel Pressgut 3 bestehend aus Furnierschichten, Lagen- oder Sperrholz angeordnet.The FIG. 1 shows a press dies with male 1 and female die 5 of a wood material with inserted heating material 2 on the outer edge of the male part 1 and heating material 4 on the outer edge of the die 5. Between Heizmaterial 2 and 4, the stack of pressed material 3 consisting of veneer layers, ply or plywood arranged.

Die zweiteilige Pressform wird aus einem Holzmaterial, beispielsweise Multiplex, Medium Density Fibreboard, unter Nutzung einer CNC-Fräse hergestellt. Auf die Matrize 5 wird ein elektrisch leitendes Gewebe oder Gitter entweder als Metallgewebe, einer Folie oder als beschichtetes Trägergewebe (im Folgenden: Heizmaterial) gelegt. Das Pressgut 3 in Form von dünnen Furnierlagen wird entweder als Lagen- oder als Sperrholz, also entweder in gleichgerichteter und gegeneinander verdrehter Holzfaserrichtung eingelegt. Die einzelnen Furnierlagen sind vor dem Einlegen in die zweiteilige Pressform jeweils mit einem wärmeaktivierten Klebstoff beschichtet worden. Die beiden Außenseiten des Pressguts 3 sind unbeschichtet. Auf das Pressgut 3 wird eine weitere Lage des Heizmaterials 2 gelegt. Dann wird die Pressform geschlossen und in einer Presse mit Drücken ab 1bar zusammengepresst. Dabei wird an die aus der Pressform herausstehenden Enden der Heizmaterialien 2 und 4 eine regelbare Spannung angelegt, um die zur Aktivierung der Klebstoffe notwendigen Temperaturen im Inneren der Pressform zu erzeugen. Abhängig von den genutzten Heizmaterialien 2 und 4 wird ein Gleichstrom unterhalb der maximalen Berührungsspannung von 120V oder Wechselstrom unterhalb der maximalen Berührungsspannung von 50V angelegt. Die Erwärmung aktiviert den Kleber, der zwischen die Lagen des Pressgutes 3 eingebracht wurde. Die Lagen werden miteinander verklebt und in der gewünschten 3D-Form fixiert.The two-part mold is made from a wood material, for example Multiplex, Medium Density Fiberboard, using a CNC milling machine. On the die 5, an electrically conductive fabric or mesh either as a metal fabric, a film or as a coated carrier fabric (hereinafter: heating material) is placed. The pressed material 3 in the form of thin veneer layers is inserted either as ply or as plywood, ie either in the same direction and against each other twisted wood fiber direction. The individual veneer layers have each been coated with a heat-activated adhesive prior to insertion into the two-part mold. The two outer sides of the pressed material 3 are uncoated. On the pressed material 3, a further layer of the heating material 2 is placed. Then the mold is closed and pressed together in a press with pressures from 1 bar. In this case, a controllable voltage is applied to the protruding from the mold ends of the heating materials 2 and 4 in order to generate the necessary for the activation of the adhesives temperatures inside the mold. Depending on the heating materials used 2 and 4, a DC current is applied below the maximum contact voltage of 120V or AC below the maximum contact voltage of 50V. The heating activates the adhesive which has been introduced between the layers of the pressed material 3. The layers are glued together and fixed in the desired 3D shape.

Beispiel 2Example 2

Die Figur 2 zeigt ein Pressgesenke mit Patrize 1 und Matrize 5 aus einem Holzwerkstoff mit eingelegtem Heizmaterial 3 mittig im Pressgut bestehend aus einer oberen Lage 2 und einer unteren Lage 4. Durch das Einlegen des Heizmaterials 3 zwischen die Lagen des Pressguts wird einerseits der Kleber beheizt und andererseits ein dauerhaft beheizbares Pressgut erhalten.The FIG. 2 shows a press dies with male 1 and 5 die from a wood material with inserted heating material 3 in the center of the pressed material consisting of an upper layer 2 and a lower layer 4. By inserting the heating material 3 between the layers of the pressed material on the one hand, the adhesive is heated and on the other hand permanently heated material to be pressed.

Claims (3)

Pressform für die Umformung von Holzwerkstoffen aus Furnierlagen unter Einwirkung von Druck und Wärme, bestehend aus einer Patrize (1) und einer Matrize (5), dadurch gekennzeichnet, dass in die ein- oder mehrfach gekrümmte Holzpressform die mit wärmeaktiviertem Klebstoff beschichteten Furnierlagen und plattenförmiges, elektrisch beheizbares Heizmaterial eingelegt sind.Mold for the transformation of wood-based materials from veneer layers under the action of pressure and heat, consisting of a male mold (1) and a female mold (5), characterized in that in the one or more times curved wood molding die coated with heat-activated adhesive veneer layers and plate-shaped, electrically heated heating material are inserted. Pressform nach Anspruch 1, gekennzeichnet dadurch, dass das Heizmaterial zwischen Patrize (1) bzw. Matrize (5) und Furnierlagen angeordnet ist.Press mold according to Claim 1, characterized in that the heating material is arranged between male mold (1) or female mold (5) and veneer layers. Pressform nach Anspruch 1, gekennzeichnet dadurch, dass das Heizmaterial zwischen den Furnierlagen angeordnet ist.Press mold according to claim 1, characterized in that the heating material is arranged between the veneer layers.
EP10014244A 2009-11-14 2010-11-03 Press moulding apparatus for shaping of veneer layers wood material Withdrawn EP2319684A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910053412 DE102009053412A1 (en) 2009-11-14 2009-11-14 Press mold for the transformation of wood-based materials from veneer layers

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
DE102009053412 Previously-Filed-Application 2009-11-04

Publications (2)

Publication Number Publication Date
EP2319684A2 true EP2319684A2 (en) 2011-05-11
EP2319684A3 EP2319684A3 (en) 2013-01-16

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EP10014244A Withdrawn EP2319684A3 (en) 2009-11-14 2010-11-03 Press moulding apparatus for shaping of veneer layers wood material

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3146797A4 (en) * 2014-05-23 2018-01-17 Saab Ab Resistive heating curing device for resin materials

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935562A1 (en) 1989-10-25 1991-05-02 Friz Maschinenbau Gmbh Bag press for e.g. veneering shapes - has fixed lower platen with vacuum bores and moving frame with pressurised membrane contg. fabrics with embedded polyester heater element
DE4112607A1 (en) 1991-04-17 1992-10-22 Friz Maschinenbau Gmbh Applying flexible coating to profiled surface of flat components - where coating is drawn onto component by membrane, then pressure is applied by stronger membrane fixed to upper press platen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2716157C2 (en) * 1977-04-12 1979-03-29 Robert A. Seguin Tex. Kleinguenther (V.St.A.) Process for producing dry, dimensionally stable wood
DE8509233U1 (en) * 1985-03-28 1985-05-09 Soma Johannes Sonnberger, 4834 Harsewinkel Heating press

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3935562A1 (en) 1989-10-25 1991-05-02 Friz Maschinenbau Gmbh Bag press for e.g. veneering shapes - has fixed lower platen with vacuum bores and moving frame with pressurised membrane contg. fabrics with embedded polyester heater element
DE4112607A1 (en) 1991-04-17 1992-10-22 Friz Maschinenbau Gmbh Applying flexible coating to profiled surface of flat components - where coating is drawn onto component by membrane, then pressure is applied by stronger membrane fixed to upper press platen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3146797A4 (en) * 2014-05-23 2018-01-17 Saab Ab Resistive heating curing device for resin materials

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DE102009053412A1 (en) 2011-05-19
EP2319684A3 (en) 2013-01-16

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