WO2002094548A1 - Heating device for vacuum presses - Google Patents

Heating device for vacuum presses Download PDF

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Publication number
WO2002094548A1
WO2002094548A1 PCT/ES2001/000208 ES0100208W WO02094548A1 WO 2002094548 A1 WO2002094548 A1 WO 2002094548A1 ES 0100208 W ES0100208 W ES 0100208W WO 02094548 A1 WO02094548 A1 WO 02094548A1
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WO
WIPO (PCT)
Prior art keywords
supports
heat sources
heat
structures
sources
Prior art date
Application number
PCT/ES2001/000208
Other languages
Spanish (es)
French (fr)
Inventor
Antón NABUURS
Original Assignee
Nabuurs Developing, S.L.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nabuurs Developing, S.L. filed Critical Nabuurs Developing, S.L.
Priority to PCT/ES2001/000208 priority Critical patent/WO2002094548A1/en
Publication of WO2002094548A1 publication Critical patent/WO2002094548A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • B29C51/425—Heating or cooling of preforms, specially adapted for thermoforming using movable heating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum

Definitions

  • the present invention relates to a structure carrying heat sources, such as infrared lamps, to be placed on the surface of tables constituting vacuum presses, and / or on a folding frame carrying an elastic membrane arranged in an articulated manner on the surface of these tables.
  • heat sources such as infrared lamps
  • the piece of plastic material must be preheated to be able to perform contom, for example the curves on the edges of a kitchen cabinet door, or a bench, or certain
  • Figure 1 shows a perspective view of a table constituting a vacuum press, provided with support structures of heat sources according to a preferred embodiment of the invention, in which said structures are supported on a guide arranged in or together to the surface of the table or of the frame that forms the table cover, in which said structures are movable by means of said guides along the length of the table.
  • the structure 5 movable on the guides 4 arranged on
  • the table 1 or deck 2 preferably have an arc shape, although due to the versatility in the movement on the guide, the orientation and the extension of the supports 6 of the heat sources 7, this is a not necessary form.
  • the guide 4 has, as we have said, at least one slot 8 that allows the movement of the structure 5 along the pair of guides (or the single guide in case of an alternative embodiment).
  • a drag skate 12 which further allows the fixing and maneuvering means to be displaced from the vertical of the structure when it is located on the vertical of the sliding groove.
  • the groove 13 forming the structure 5 houses the head of a corresponding screw or nut that is fixed by means of a billet 14 as a pressure screw, so that the position of the support 6 during tightening determines its corresponding orientation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

The invention relates to a heating device for vacuum presses comprising a device that acts as a support for structures (5) on top of which are positioned supports (6) for heat sources (7). Said structures can be moved longitudinally by means of a guide device on which the heat source supports can also move. The aforementioned supports are adjustable and extractable while the heat sources can be adjusted. The inventive device can be used for the localised heating of the materials to be heated in the desired areas. The invention is suitable for the production of heating devices for vacuum presses.

Description

Dispositivo calefactor para prensas de vacío. Heating device for vacuum presses.
La presente invención se refiere a una estructura portadora de fuentes de calor, tal como lámparas infrarrojas, para ser colocada en la superficie de mesas constitutivas de prensas de vacío, y/o sobre un marco abatible portador de una membrana elástica dispuesto de modo articulado sobre la superficie de dichas mesas.The present invention relates to a structure carrying heat sources, such as infrared lamps, to be placed on the surface of tables constituting vacuum presses, and / or on a folding frame carrying an elastic membrane arranged in an articulated manner on the surface of these tables.
Las prensas de vacío provistas de una membrana elástica están destinadas, entre otras aplicaciones, a la formación de chapados de materiales plásticos, de modo que mediante la extracción del aire contenido en el interior de la cámara resultante, la membrana elástica ejerce una presión regular sobre toda la superficie de la pieza, y correspondiente chapa, facilitando la correspondiente adhesión.The vacuum presses provided with an elastic membrane are intended, among other applications, for the formation of plastics of plastics materials, so that by extracting the air contained inside the resulting chamber, the elastic membrane exerts a regular pressure on the entire surface of the piece, and corresponding sheet, facilitating the corresponding adhesion.
La mayor parte de los materiales de naturaleza plástica que se utilizan para los chapados tiene una gran rigidez a temperatura ambiente, por lo que su conformación a dicha temperatura supondría la rotura de lasMost of the materials of a plastic nature that are used for plating have a great rigidity at room temperature, so that their conformation at that temperature would imply the breakage of the
chapas, no siendo entonces satisfactorio el resultado deseado.plates, the desired result not being satisfactory.
Es por ello que la pieza de material plástico debe ser precalentada para poder realizar los contomos, por ejemplo las curvas en los bordes de una puerta de un armario de cocina, o de una bancada, o ciertosThat is why the piece of plastic material must be preheated to be able to perform contom, for example the curves on the edges of a kitchen cabinet door, or a bench, or certain
rebajes o resaltes que pudieran darse en la superficie a conformar. En ocasiones el calentamiento es únicamente requerido en una zona de la pieza, o se requiere con distinta intensidad según la zona que se pretenda calentar.recesses or projections that could occur on the surface to be shaped. Sometimes heating is only required in one area of the piece, or it is required with different intensity depending on the area to be heated.
El estado de la técnica más relevante viene dado por la patente estadounidense US 5 236658. En la divulgación realizada por dicha patente se dispone una mesa de conformación consistente en una prensa de vacío, sobre la que se sitúa una estructura solidariamente unida a la mesa o a una plataforma practicable, de modo que la fuente de calor está situada sobre dicha plataforma, y la calienta de modo regular, más en las zonas centrales que en las extremas.The most relevant state of the art is given by US patent US 5 236658. In the disclosure made by said patent there is a forming table consisting of a vacuum press, on which a structure jointly attached to the table or to a table is located. a practicable platform, so that the heat source is located on said platform, and heats it on a regular basis, more in the central areas than in the extreme ones.
Sin embargo, la invención indicada no es satisfactoria cuando se requiere una fuente de calor localizada, en tanto que la fuente es de intensidad uniforme para toda la superficie, y la altura desde la que se proyecta es también uniforme.However, the indicated invention is not satisfactory when a localized heat source is required, while the source is of uniform intensity for the entire surface, and the height from which it is projected is also uniform.
Además, las colas utilizadas se secan en algunos puntos antes de que se haya producido el calentamiento requerido en otros de los puntos.In addition, the glues used are dried at some points before the required heating has occurred at other points.
La presente invención, tiene por objeto un dispositivo para el precalentamiento de chapas para ser conformadas y adheridas sobre una base o matriz que permite la aplicación del calor allá donde se necesita, sinThe present invention aims at a device for preheating plates to be shaped and adhered on a base or matrix that allows the application of heat where it is needed, without
sufrir los inconvenientes de exceso de calor en determinados puntos, y evitando el secado del adhesivo por exceso de calor, permitiendo a su vez una gran versatilidad en el aumento o disminución de las fuentes de calor en la mesa de conformación.suffer the inconveniences of excess heat at certain points, and avoiding the drying of the adhesive due to excess heat, at the same time allowing great versatility in the increase or decrease of heat sources in the forming table.
Con objeto de ilustrar la explicación que va a seguir, adjuntamos a la presente memoria descriptiva cuatro hojas de dibujos, que en cuatro figuras representa la esencia de la presente invención, y en las que:In order to illustrate the explanation to be followed, we attach to the present specification four sheets of drawings, which in four figures represent the essence of the present invention, and in which:
La figura 1 muestra una vista en perspectiva de una mesa constitutiva de una prensa de vacío, dotada de unas estructuras soporte de fuentes de calor de acuerdo con una realización preferente de la invención, en que dichas estructuras están soportadas sobre una guía dispuesta en o junto a la superficie de la mesa o del marco que forma la cubierta de la mesa, en que dichas estructuras son desplazables por medio de dichas guías a lo largo de la longitud de la mesa.Figure 1 shows a perspective view of a table constituting a vacuum press, provided with support structures of heat sources according to a preferred embodiment of the invention, in which said structures are supported on a guide arranged in or together to the surface of the table or of the frame that forms the table cover, in which said structures are movable by means of said guides along the length of the table.
La figura 2 muestra una vista frontal de la mesa de la figura 1, en que se aprecia una de las estructuras en forma de arco, portadora de las fuentes de calor, que constituyen una guía para el correspondiente desplazamiento de unos soportes de las fuentes de calor.Figure 2 shows a front view of the table of Figure 1, in which one of the arc-shaped structures, bearing the heat sources, which constitute a guide for the corresponding displacement of supports of the sources of hot.
La figura 3 muestra un detalle del pilar que forma el arco, así como los medios de sujeción de acuerdo con una realización preferente. La figura 4 muestra una vista, conforme a la figura 3, en la que apreciamos el pilar, así como un medio de sujeción (en dicha figura se ha representado la guía inferior según una vista frontal por claridad de representación, si bien en dicha realización la guía sería lateral)Figure 3 shows a detail of the pillar that forms the arch, as well as the clamping means according to a preferred embodiment. Figure 4 shows a view, according to Figure 3, in which we appreciate the pillar, as well as a clamping means (in said figure the lower guide is represented according to a front view for clarity of representation, although in said embodiment the guide would be lateral)
Además de las realizaciones representadas, es también posible emplear una estructura dotadas de mayor rigidez unidas solamente a uno de los lados, de modo que se permita al igual que en la realización precedente, un desplazamiento lateral de dichas estructuras, y del soporte de la fuente de calor a lo largo de cada una de las estructurasIn addition to the embodiments shown, it is also possible to employ a structure with greater rigidity attached only to one of the sides, so as to allow, as in the previous embodiment, a lateral displacement of said structures, and of the source support of heat along each of the structures
De acuerdo con la realización representada, vemos con 1 una i mesa constitutiva de la base de una prensa de vacío, que presenta normalmente una cubierta 2 articulada respecto a la base por medio de un dispositivo de articulación 3.According to the embodiment shown, we see with 1 a constitutive table of the base of a vacuum press, which normally has a cover 2 articulated with respect to the base by means of an articulation device 3.
Dispuestos a los lados de la mesa o de la cubierta, o por encima de la cubierta, se sitúan longitudinalmente unos carriles 4. Dichos carriles presentan medios de unión a la mesa o cubierta, y al menos una guía para la sujeción amovible de al menos una estructura 5 portadora de los soportesArranged on the sides of the table or the deck, or above the deck, rails 4 are positioned longitudinally. Said rails have means for joining the table or deck, and at least one guide for the removable fastening of at least a carrier structure 5
6 de las fuentes de calor 76 of heat sources 7
La estructura 5 desplazable sobre las guías 4 dispuestas sobreThe structure 5 movable on the guides 4 arranged on
la mesa 1 o cubierta 2, tienen preferentemente forma de arco, si bien debido a la versatilidad en el desplazamiento sobre la guía, la orientación y la extensión de los soportes 6 de las fuentes de calor 7, es esta una forma no necesaria.the table 1 or deck 2, preferably have an arc shape, although due to the versatility in the movement on the guide, the orientation and the extension of the supports 6 of the heat sources 7, this is a not necessary form.
Siempre según la realización representada, la guía 4 dispone, como hemos dicho, al menos una ranura 8 que permite el desplazamiento de la estructura 5 a lo largo del par de guías (o de la guía única en caso de una realización alternativa).Always according to the embodiment shown, the guide 4 has, as we have said, at least one slot 8 that allows the movement of the structure 5 along the pair of guides (or the single guide in case of an alternative embodiment).
Para la unión y liberación de la estructura 5 respecto a la guíaFor joining and releasing structure 5 with respect to the guide
4, se ha previsto que en la ranura 8, se inserta la cabeza 9 de un tomillo 10 (o tuerca correspondiente), que será maniobrado mediante una palanquilla de maniobra 11 o dispositivo similar, configurando un tornillo de presión.4, it is provided that in slot 8, the head 9 of a thyme 10 (or corresponding nut) is inserted, which will be maneuvered by a maneuvering billet 11 or similar device, by configuring a pressure screw.
Está prevista la utilización de un patín de arrastre 12 que permita además que el medio de fijación y maniobra esté desplazado respecto a la vertical de la estructura cuando ésta está situada sobre la vertical de la ranura de desplazamiento.The use of a drag skate 12 is provided which further allows the fixing and maneuvering means to be displaced from the vertical of the structure when it is located on the vertical of the sliding groove.
La estructura 5 forma a su vez una guía 13 sobre la que pueden ser desplazados los soportes 6 de las fuentes de calor. Se ha previsto que el perfil de guía sea esencialmente igual al de las guías de la base, pero puede ser utilizado cualquier otro, o incluso una guía en forma de barra abrazada porThe structure 5 in turn forms a guide 13 on which the supports 6 of the heat sources can be displaced. It is envisioned that the guide profile is essentially the same as that of the base guides, but any other, or even a bar-shaped guide embraced by
el soporte 6 de la fuente de calor. Siempre según una realización preferente de entre las posibles, la ranura 13 que forma la estructura 5 aloja la cabeza de un tornillo o tuerca correspondiente que es fijada por medio de una palanquilla 14 a modo de tornillo de presión, de modo que la posición del soporte 6 durante el apriete determina su correspondiente orientaciónthe support 6 of the heat source. Always according to a preferred embodiment among the possible ones, the groove 13 forming the structure 5 houses the head of a corresponding screw or nut that is fixed by means of a billet 14 as a pressure screw, so that the position of the support 6 during tightening determines its corresponding orientation
Con objeto de poder aplicar el calor con la máxima precisión sobre la zona requerida, se ha previsto que los soportes sean a su vez independientemente orientables, y extensibles o regulables en extensión, y las dichas fuentes de calor orientables a su vez.In order to be able to apply the heat with maximum precision over the required area, it is provided that the supports are in turn independently orientable, and extensible or adjustable in extension, and said heat sources in turn.
Es posible también que el conjunto de fas estructuras pueda ser ajustado en altura, es decir que disponga medios, por ejemplo telescópicos, que permita el ascenso o descenso del conjunto de las fuentes de calor.It is also possible that the set of fas structures can be adjusted in height, that is to say that it has means, for example telescopic, that allows the rise or fall of the set of heat sources.
El dispositivo descrito facilita también la sustitución de unas fuentes de calor por otras, la anexión o sustracción de dichas fuentes, en función de la potencia y aplicaciones requeridas.The described device also facilitates the replacement of some heat sources with others, the annexation or subtraction of said sources, depending on the power and applications required.
Es de aplicación industrial en la fabricación de dispositivos calefactores para prensas de vacío. It is of industrial application in the manufacture of heating devices for vacuum presses.

Claims

REIVINDICACIONES
1.- Dispositivo calefactor para prensas de vacío, caracterizado por disponer: a) al menos una estructura (5) portadora de al menos un soporte1.- Heating device for vacuum presses, characterized by having: a) at least one structure (5) carrying at least one support
(6) para fuente de calor (7) tal como una lámpara infrarroja, b) al menos un dispositivo de guiado horizontal de dicha estructura (5) solidariamente unido a la mesa o a la cubierta de dicha mesa que permita el desplazamiento longitudinal de la dicha estructura o estructuras portadora o portadoras de la fuente o fuentes de calor.(6) for heat source (7) such as an infrared lamp, b) at least one horizontal guiding device of said structure (5) jointly attached to the table or to the deck of said table that allows the longitudinal displacement of said carrier structure or structures of the source or sources of heat.
2.- Dispositivo, según la reivindicación 1, caracterizado porque el dispositivo de guiado consiste en unas guías (4) dispuestas a ambos lados de la mesa (1) o cubierta (2), o por encima de dicha cubierta (2).2. Device according to claim 1, characterized in that the guiding device consists of guides (4) arranged on both sides of the table (1) or cover (2), or above said cover (2).
3.- Dispositivo, según la reivindicación 1, caracterizado porque el dispositivo de guiado se dispone únicamente en uno de los lados de la mesa.3. Device according to claim 1, characterized in that the guiding device is arranged only on one side of the table.
4.- Dispositivo, según las reivindicaciones 2 y 3, caracterizado porque los medios de liberación de las estructuras para su desplazamiento consisten en tornillos de presión.4. Device according to claims 2 and 3, characterized in that the means for releasing the structures for their movement consist of pressure screws.
5.- Dispositivo, según la reivindicación 1, caracterizado porque la estructura (5) portadora de los soportes (6) de fuentes de calor (7) está formada a su vez por una guía (13) sobre la que pueden deslizarse cada uno de los soportes (6) de las fuentes de calor (7).5. Device according to claim 1, characterized because the structure (5) carrying the supports (6) of heat sources (7) is in turn formed by a guide (13) on which each one of the supports (6) of the heat sources can slide ( 7).
6.- Dispositivo, según las reivindicaciones 1 y 5, caracterizado porque las estructuras (5) portadoras de los soportes (6) de la fuente de calor (7) presentan forma de arco.6. Device according to claims 1 and 5, characterized in that the structures (5) carrying the supports (6) of the heat source (7) have an arc shape.
7.- Dispositivo, según la reivindicación 1, caracterizado porque los soportes (6) de las fuentes de calor (7) son orientables en el plano que forma la estructura (5) que los porta.7. Device according to claim 1, characterized in that the supports (6) of the heat sources (7) are orientable in the plane that forms the structure (5) that carries them.
8.- Dispositivo, según la reivindicación 1, caracterizado porque los soportes de las fuentes de calor (7) son extensibles.8. Device according to claim 1, characterized in that the supports of the heat sources (7) are extensible.
9.- Dispositivo, según la reivindicación 1, caracterizado porque las fuentes de calor (7) son orientables respecto al correspondiente soporte (6). 9. Device according to claim 1, characterized in that the heat sources (7) are orientable with respect to the corresponding support (6).
PCT/ES2001/000208 2001-05-24 2001-05-24 Heating device for vacuum presses WO2002094548A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2001/000208 WO2002094548A1 (en) 2001-05-24 2001-05-24 Heating device for vacuum presses

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Application Number Priority Date Filing Date Title
PCT/ES2001/000208 WO2002094548A1 (en) 2001-05-24 2001-05-24 Heating device for vacuum presses

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2525390R1 (en) * 2013-06-19 2015-04-10 Roca Sanitario, S. A. THERMOCONFORMING MACHINE AND PARTS THERMOCONFORMING PROCEDURE THROUGH THE MACHINE

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB750145A (en) * 1952-12-30 1956-06-13 Interwood Ltd Improvements in or relating to vacuum panel-shaping and veneering presses
US3905861A (en) * 1971-05-17 1975-09-16 Royal Industries Postforming
WO1990006224A1 (en) * 1988-12-05 1990-06-14 Ceiling Systems, Inc. The method and apparatus for refinishing building panels
WO1994005483A1 (en) * 1992-09-03 1994-03-17 Leonhard Kurz Gmbh & Co. Method and machine for laminating a decorative layer to the surface of a three-dimensional object
US5667747A (en) * 1995-03-22 1997-09-16 Harding Product Supply Ltd. Vacuum formed three-dimensional surface article

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB750145A (en) * 1952-12-30 1956-06-13 Interwood Ltd Improvements in or relating to vacuum panel-shaping and veneering presses
US3905861A (en) * 1971-05-17 1975-09-16 Royal Industries Postforming
WO1990006224A1 (en) * 1988-12-05 1990-06-14 Ceiling Systems, Inc. The method and apparatus for refinishing building panels
WO1994005483A1 (en) * 1992-09-03 1994-03-17 Leonhard Kurz Gmbh & Co. Method and machine for laminating a decorative layer to the surface of a three-dimensional object
US5667747A (en) * 1995-03-22 1997-09-16 Harding Product Supply Ltd. Vacuum formed three-dimensional surface article

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2525390R1 (en) * 2013-06-19 2015-04-10 Roca Sanitario, S. A. THERMOCONFORMING MACHINE AND PARTS THERMOCONFORMING PROCEDURE THROUGH THE MACHINE

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