WO2011131804A1 - Method for manufacturing polyurethane foam parts with textile covering and mould for obtaining it - Google Patents

Method for manufacturing polyurethane foam parts with textile covering and mould for obtaining it Download PDF

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Publication number
WO2011131804A1
WO2011131804A1 PCT/ES2010/070604 ES2010070604W WO2011131804A1 WO 2011131804 A1 WO2011131804 A1 WO 2011131804A1 ES 2010070604 W ES2010070604 W ES 2010070604W WO 2011131804 A1 WO2011131804 A1 WO 2011131804A1
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WO
WIPO (PCT)
Prior art keywords
mold
textile
open mold
open
polyurethane foam
Prior art date
Application number
PCT/ES2010/070604
Other languages
Spanish (es)
French (fr)
Inventor
Jaime Puyol Carbonell
José TOMÁS TAPIA
Original Assignee
Centro Tecnológico De Grupo Copo, S.L.U.
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.)
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Application filed by Centro Tecnológico De Grupo Copo, S.L.U. filed Critical Centro Tecnológico De Grupo Copo, S.L.U.
Publication of WO2011131804A1 publication Critical patent/WO2011131804A1/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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/585—Moulds with adjustable size of the mould cavity

Definitions

  • the present invention refers to a process for manufacturing polyurethane foam pieces with textile coating and mold for obtaining them.
  • the mold is then opened by removing the cover to extract the manufactured part with the inclusion of the textile laminar body attached to the polyurethane material by a surface part thereof previously provided.
  • the object of the invention is a new method in which a main portion of the textile laminar body is attached against a front surface of a movable part of the mold, the rest of that textile laminar body remaining outside the interior space of the mold.
  • foaming on open mold of polyurethane foam is well known, subsequently closing it for the geometric conformation and adaptation of the foam to the interior configuration of the mold.
  • the normally aluminum mold is composed of a bottom and its corresponding cover or covers, which together configure the geometry that is to be achieved, the whole assembly being normally heated.
  • the process is the following.
  • liquid polyurethane is poured into the bottom thereof, so that when the polyurethane reacts in contact with the air and supported with the temperature of the mold, such polyurethane material begins to grow, increasing its volume, closing the lid or mold caps, whereby the polyurethane adapts to the internal geometry of the mold.
  • the polyurethane cures and solidifies, and then once the mold is opened, remove the manufactured part. This piece thus obtained is subsequently covered with a textile sheath.
  • This manufacturing process would be as follows.
  • the textile cover is placed and adapted, by vacuum aspiration, to then pour the liquid polyurethane onto the textile.
  • the necessary covers are closed and the polyurethane grows and adapts by taking the mold geometry and in turn firmly joining the textile material placed on the mold walls. The result is a piece of polyurethane foam with the textile cover attached to it.
  • the invention consists in a process for manufacturing polyurethane foam pieces with textile coating and mold for obtaining them.
  • the process aims to obtain a piece of polyurethane foam, a part of which requires to be attached to a textile laminar body, without interposing barriers between the foam piece to be obtained and some parts of the textile laminar body, so that the new invention allows take advantage of the facilities and advantages of traditional formulations.
  • the tooling of the open mold developed adapts to the current foaming facilities, without these having to be modified and being able to coexist in the manufacture with traditional foaming molds.
  • the novelty presented is that starting from a traditional foaming mold, it is modified to be able to perform in some areas of it a "foaming in situ", without these affecting the normal operation of the installation.
  • the area where it is intended to foam on top of the cover must be independent of the rest, at least in functionality, during a series of steps in the process; to then fit the rest of the mold and form a unit with it.
  • this area of the mold must have some system to fix and adapt a textile laminar body determining a cover to the corresponding surface, such as a vacuum suction system.
  • an open mold whose area where the cover is foam, has movement, either with linear displacement or angular displacement, to be able to separate it from the rest of the mold.
  • This area is equipped with a double wall and small holes in the surface, to be able to perform the vacuum by vacuum.
  • the aim of the movement is to be able to protect under it the parts of the case that are not going to be over-foamed.
  • Figure 1.- Shows a schematic view of an initial phase of the manufacturing process of polyurethane foam pieces with textile coating, object of the invention.
  • the object of the invention is also an open mold for obtaining it.
  • FIGS 2 and 3.- They show intermediate phases of the manufacturing process.
  • Figure 4.- Shows the piece obtained with the textile coating.
  • Figure 5. Shows a schematic view of an open mold with another embodiment different from that shown in the previous figures.
  • Figure 6. Shows a perspective view of the open mold represented in the previous figure.
  • the polyurethane foam pieces with textile coating are manufactured by an open mold, inside which liquid polyurethane is poured into the bottom of such mold, having previously placed in a part of such bottom a laminar body textile, then closing the mold with a lid, creating a closed space where it will increase the volume of the polyurethane material as it heals completely occupying the entire interior space of the mold.
  • the mold is then opened by removing the cover to extract the manufactured part with the inclusion of the textile laminar body attached to the polyurethane material by a surface part thereof previously provided.
  • the open mold 1 comprises at least one movable part 2 with a front surface 3 on which a main portion 4 of a textile laminar body 5 sits, ensuring that the main portion 4 is secured by means of a vacuum, so that the rest of such textile laminar body 5 will be provisionally arranged by wrapping that movable part 2 of the open mold 1 as a skirt by outer areas that are not part of the bottom and inner space of the open mold assembly 1.
  • the mold 1 is opened by removing the lid 6 and the manufactured part 7 comprising the polyurethane body 8 itself is extracted with the incorporation of the textile laminar body 5 fixed by its main portion 4 to said polyurethane body 8 by an adhesion zone 9 of the outer surface of the polyurethane body 8.
  • the mold incorporates a perimeter space 10 around the movable part 2 of the open mold 1 to accommodate the part of the textile laminar body 5 arranged outside the interior space of the open mold 1.
  • the open mold 1 in a first embodiment as described above, comprises a base formed by a single perimeter piece 11 surrounding the movable part 2, perimeter piece 11 which together with the movable part 2 include the internal surface of the open mold 1.
  • the open mold 1 ' comprises a base formed by a perimeter piece 11' that also surrounds the movable part 2 and a false frame 12 that superiorly limits the interior space of the open mold 1 '.
  • That false frame 12 can have linear or angular movement to move from an inactive position to an active one and vice versa, the active position corresponding to the preparation of the open mold 1 'to receive the polyurethane material.

Abstract

The method is of the type for which polyurethane parts with textile covering are manufactured using an open mould. It is characterized in that in an initial phase, before the liquid polyurethane is poured into the open mould, a main portion (4) of the laminar textile body (5) covers a front surface (3) of the base of the open mould (1), the front surface (3) being incorporated into a moveable part (2) of the open mould (1), said movable part (2) being, in this initial phase, moved in relation to the rest of the open mould (1). Conversely, in a subsequent phase, the moveable part (2) is moved to a final position in line with the rest of the open mould (1) before the liquid polyurethane is poured, the remainder of the laminar textile body (5) being located outside the interior space of the open mould (1).

Description

PROCEDIMIENTO DE FABRICACION DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL Y MOLDE PARA SU OBTENCION. MANUFACTURING PROCEDURE OF POLYURETHANE FOAM PARTS WITH TEXTILE COATING AND MOLD FOR OBTAINING.
OBJETO DE LA INVENCIÓN  OBJECT OF THE INVENTION
La presente invención, según se expresa en el enunciado de esta memoria descriptiva, se refiere a un procedimiento de fabricación de piezas de espuma de poliuretano con recubrimiento textil y molde para su obtención .  The present invention, as expressed in the statement of this specification, refers to a process for manufacturing polyurethane foam pieces with textile coating and mold for obtaining them.
En principio se trata de un molde abierto en cuyo interior se vierte poliuretano liquido en el fondo de tal molde, habiendo colocado previamente en una parte de tal fondo un cuerpo laminar textil, cerrando después el molde con una tapa, creándose un espacio cerrado donde aumentará el volumen del material de poliuretano a medida que va curando ocupando totalmente todo ese espacio interior del molde .  In principle, it is an open mold inside which liquid polyurethane is poured into the bottom of such mold, having previously placed a textile laminar body on a part of such bottom, then closing the mold with a lid, creating a closed space where it will increase the volume of the polyurethane material as it heals completely occupying all that interior space of the mold.
A continuación se abre el molde retirando la tapa para extraer la pieza fabricada con la inclusión del cuerpo laminar textil unida al material de poliuretano por una parte superficial del mismo prevista previamente.  The mold is then opened by removing the cover to extract the manufactured part with the inclusion of the textile laminar body attached to the polyurethane material by a surface part thereof previously provided.
Partiendo de esta premisa, el objeto de la invención es un nuevo procedimiento en el que una porción principal del cuerpo laminar textil se adosa contra una superficie frontal de una parte móvil del molde, quedando el resto de ese cuerpo laminar textil por fuera del espacio interior del molde.  Starting from this premise, the object of the invention is a new method in which a main portion of the textile laminar body is attached against a front surface of a movable part of the mold, the rest of that textile laminar body remaining outside the interior space of the mold.
ANTECEDENTES DE LA INVENCION  BACKGROUND OF THE INVENTION
En la actualidad, para la fabricación de cojines en el sector de la automoción, es sobradamente conocida la espumación sobre molde abierto de espuma de poliuretano, cerrando posteriormente el mismo para la conformación y adaptación geométricas de la espuma a la configuración interior del molde. El molde normalmente de aluminio, se compone de un fondo y sus correspondientes tapa o tapas, que configuran en conjunto la geometría que se quiere alcanzar, estando todo el conjunto normalmente calefactado. At present, for the manufacture of cushions in the automotive sector, foaming on open mold of polyurethane foam is well known, subsequently closing it for the geometric conformation and adaptation of the foam to the interior configuration of the mold. The normally aluminum mold is composed of a bottom and its corresponding cover or covers, which together configure the geometry that is to be achieved, the whole assembly being normally heated.
El proceso, es el siguiente.  The process is the following.
Con el molde abierto, se vierte poliuretano líquido en el fondo del mismo, de manera que al reaccionar el poliuretano en contacto con el aire y apoyado con la temperatura del molde, tal material de poliuretano comienza a crecer, aumentando su volumen, cerrándose la tapa o tapas del molde, con lo cual el poliuretano se va adaptando a la geometría interior del molde. Pasado un tiempo el poliuretano cura y se solidifica, pudiendo a continuación una vez abierto el molde, retirar la pieza fabricada. Esta pieza así obtenida es posteriormente recubierta con una funda textil .  With the mold open, liquid polyurethane is poured into the bottom thereof, so that when the polyurethane reacts in contact with the air and supported with the temperature of the mold, such polyurethane material begins to grow, increasing its volume, closing the lid or mold caps, whereby the polyurethane adapts to the internal geometry of the mold. After a while the polyurethane cures and solidifies, and then once the mold is opened, remove the manufactured part. This piece thus obtained is subsequently covered with a textile sheath.
Otro de los procesos, que actualmente se conoce, es la espumación de poliuretano directamente sobre la funda de textil, obteniendo así un conjunto compuesto por pieza de poliuretano conformada y adherida a la funda textil. Este proceso es comúnmente conocido como "espumación in situ".  Another of the processes, which is currently known, is the foaming of polyurethane directly on the textile cover, thus obtaining a set consisting of a piece of polyurethane formed and adhered to the textile cover. This process is commonly known as "foaming in situ."
Este proceso de fabricación sería el siguiente.  This manufacturing process would be as follows.
En primer lugar, sobre el fondo de un molde de aluminio preferentemente, se coloca y adapta la funda textil, mediante aspiración por vacío, para a continuación verter el poliuretano líquido sobre el textil. A continuación se cierran las tapas necesarias y el poliuretano crece y se adapta tomando la geometría del molde y a su vez uniéndose fijamente al material textil colocado en las paredes del molde. El resultado es una pieza de espuma de poliuretano con la funda textil adherida al mismo.  First, on the bottom of an aluminum mold preferably, the textile cover is placed and adapted, by vacuum aspiration, to then pour the liquid polyurethane onto the textile. Next, the necessary covers are closed and the polyurethane grows and adapts by taking the mold geometry and in turn firmly joining the textile material placed on the mold walls. The result is a piece of polyurethane foam with the textile cover attached to it.
En la situación actual, cuando el requerimiento es una pieza que en zonas concretas se adhiera a la funda, para aprovechar las ventajas del proceso conocido como "espumación in situ" y en el resto de la pieza no se desee que la funda se adhiera a la misma, aprovechando las ventajas de la espumación tradicional, se utilizan normalmente barreras que pueden ser de un film plástico, el cual evita que la espuma en estas zonas se adhiera a la funda, obteniendo asi una pieza que en alguna de sus zonas esté adherida a la funda y en otras no. Este proceso solo es factible en las instalaciones y moldes de "espumacion in situ" . In the current situation, when the requirement is a piece that in specific areas adheres to the sheath, to take advantage of the process known as "foaming in situ" and in the rest of the piece it is not desired that the sheath adheres to the same, taking advantage of traditional foaming, are used Normally barriers that can be of a plastic film, which prevents the foam in these areas from adhering to the cover, thus obtaining a piece that in one of its areas is adhered to the cover and in others not. This process is only feasible in installations and molds of "foaming in situ".
DESCRIPCIÓN DE LA INVENCIÓN  DESCRIPTION OF THE INVENTION
La invención consiste en un procedimiento de fabricación de piezas de espuma de poliuretano con recubrimiento textil y molde para su obtención.  The invention consists in a process for manufacturing polyurethane foam pieces with textile coating and mold for obtaining them.
El procedimiento pretende obtener una pieza de espuma de poliuretano, una parte de la cual requiere estar unida a un cuerpo laminar textil, sin intercalar barreras entre la pieza de espuma a obtener y algunas partes del cuerpo laminar textil, de manera que la nueva invención permite aprovechar las instalaciones y ventajas que suponen las formulaciones tradicionales.  The process aims to obtain a piece of polyurethane foam, a part of which requires to be attached to a textile laminar body, without interposing barriers between the foam piece to be obtained and some parts of the textile laminar body, so that the new invention allows take advantage of the facilities and advantages of traditional formulations.
El utillaje del molde abierto desarrollado se adapta a las instalaciones de espumacion actuales, sin que estas tengan que ser modificadas y pudiendo convivir en la fabricación con moldes de espumacion tradicional.  The tooling of the open mold developed adapts to the current foaming facilities, without these having to be modified and being able to coexist in the manufacture with traditional foaming molds.
Para cumplir este requisito, la novedad presentada, consiste en que partiendo de un molde de espumacion tradicional, éste se modifica para poder realizar en algunas zonas del mismo una "espumacion in situ", sin que estas afecten al normal funcionamiento de la instalación.  To meet this requirement, the novelty presented, is that starting from a traditional foaming mold, it is modified to be able to perform in some areas of it a "foaming in situ", without these affecting the normal operation of the installation.
Para acometer estas funciones, la zona donde se piensa espumar encima de la funda, debe de ser independiente del resto, por lo menos en funcionalidad, durante una serie de pasos en el proceso; para luego acoplarse al resto del molde y formar con el mismo una unidad. A su vez, esta zona del molde debe de tener algún sistema para fijar y adaptar un cuerpo laminar textil determinante de una funda a la correspondiente superficie, como por ejemplo, un sistema de aspiración mediante vacio. Al espumar encima de una parte sola de la funda, el resto de la misma tiene que ser protegida, bien sea como se hace actualmente, mediante plástico, pero que solo es válido en moldes de espumación "in situ", recogiendo el resto de funda que no se tiene que espumar en un sitio seguro, para espumar el resto de la pieza. To undertake these functions, the area where it is intended to foam on top of the cover, must be independent of the rest, at least in functionality, during a series of steps in the process; to then fit the rest of the mold and form a unit with it. In turn, this area of the mold must have some system to fix and adapt a textile laminar body determining a cover to the corresponding surface, such as a vacuum suction system. When foaming on a single part of the case, the rest of it has to be protected, either as it is currently done, by plastic, but that is only valid in "in situ" foaming molds, collecting the rest of the cover that does not have to be foamed in a safe place, to foam the rest of the piece.
Para cumplir todos estos requisitos, se ha desarrollado un molde abierto, cuya zona donde se espuma la funda, tiene movimiento, bien sea con desplazamiento lineal o desplazamiento angular, para poder separarla del resto del molde. Esta zona está dotada de doble pared y unos pequeños orificios en la superficie, para poder realizar la aspiración mediante vacio. El movimiento tiene como objetivo el poder resguardar debajo de la misma las partes de la funda que no se van a sobreespumar . Una vez que estas zonas estén bien resguardadas, se fija la zona a espumar mediante el vacio y se acopla al resto del molde, quedando formado un molde normal, con una zona cubierta por la funda .  To meet all these requirements, an open mold has been developed, whose area where the cover is foam, has movement, either with linear displacement or angular displacement, to be able to separate it from the rest of the mold. This area is equipped with a double wall and small holes in the surface, to be able to perform the vacuum by vacuum. The aim of the movement is to be able to protect under it the parts of the case that are not going to be over-foamed. Once these areas are well protected, the area to be foamed is fixed by means of a vacuum and is coupled to the rest of the mold, a normal mold being formed, with an area covered by the cover.
Asi pues, según lo descrito, las fases de procedimiento son básicamente las siguientes:  Thus, as described, the procedural phases are basically the following:
Movimiento de la zona con aspiración, hasta separarla del conjunto del molde.  Movement of the area with aspiration, until it is separated from the mold assembly.
- Colocación de la funda sobre esta zona, resguardando debajo de ésta las zonas que no se quieran sobreespumar.  - Placing the cover over this area, keeping under it areas that do not want to foam.
- Aplicar vacíos sobre la zona de forma que la funda quede fijada a la misma.  - Apply voids over the area so that the cover is fixed to it.
- Acoplamiento de la zona que se ha movido al resto del molde, dejando protegidas las zonas de la funda, que no se quieran sobreespumar.  - Coupling of the area that has been moved to the rest of the mold, leaving the areas of the sheath protected, which do not want to foam.
- Espumación a molde abierto por encima de la zona con funda, así como en el resto del molde.  - Foam with open mold above the area with cover, as well as in the rest of the mold.
- Cierre de las tapas del molde.  - Close the mold caps.
- Curado de la pieza a molde cerrado.  - Curing of the closed mold piece.
- Apertura de las tapas del molde.  - Opening of the mold covers.
- Movimiento o apertura de la zona con aspiración hasta dejar libre el resto de la funda del molde. - Retirada de la pieza fabricada con este utillaje. El resultado final es que se obtiene un cuerpo de poliuretano con zonas de la funda textil parcialmente no adheridas, pero cuya formulación de la espuma es de tipo tradicional y se puede fabricar en las instalaciones de moldes y formulaciones tradicionales, sin que éstas tengan que ser modificadas. - Movement or opening of the area with suction until free the rest of the mold cover. - Removal of the piece manufactured with this tooling. The end result is that a polyurethane body is obtained with areas of the partially non-bonded textile sheath, but whose foam formulation is of the traditional type and can be manufactured in traditional molds and formulations facilities, without these having to be modified.
A continuación para facilitar una mejor comprensión de esta memoria descriptiva y formando parte integrante de la misma, se acompañan unas figuras en las que con carácter ilustrativo y no limitativo se ha representado el objeto de la invención.  Next, in order to facilitate a better understanding of this descriptive report and forming an integral part thereof, some figures are attached in which the object of the invention has been represented by way of illustration and not limitation.
BREVE DESCRIPCIÓN DE LOS DIBUJOS  BRIEF DESCRIPTION OF THE DRAWINGS
Figura 1.- Muestra una vista esquemática de una fase inicial del procedimiento de fabricación de piezas de espuma de poliuretano con recubrimiento textil, objeto de la invención. También es objeto de la invención el molde abierto para su obtención.  Figure 1.- Shows a schematic view of an initial phase of the manufacturing process of polyurethane foam pieces with textile coating, object of the invention. The object of the invention is also an open mold for obtaining it.
Figuras 2 y 3.- Muestran fases intermedias del procedimiento de fabricación.  Figures 2 and 3.- They show intermediate phases of the manufacturing process.
Figura 4.- Muestra la pieza obtenida con el recubrimiento textil.  Figure 4.- Shows the piece obtained with the textile coating.
Figura 5.- Muestra una vista esquemática de un molde abierto con otra realización diferente a lo mostrado en las figuras anteriores.  Figure 5.- Shows a schematic view of an open mold with another embodiment different from that shown in the previous figures.
Figura 6.- Muestra una vista en perspectiva del molde abierto representado en la figura anterior.  Figure 6.- Shows a perspective view of the open mold represented in the previous figure.
DESCRIPCIÓN DE LA FORMA. DE REALIZACIÓN PREFERIDA  DESCRIPTION OF THE FORM. PREFERRED EMBODIMENT
Considerando la numeración adoptada en las figuras, las piezas de espuma de poliuretano con recubrimiento textil se fabrican mediante un molde abierto, en cuyo interior se vierte poliuretano liquido en el fondo de tal molde, habiendo colocado previamente en una parte de tal fondo un cuerpo laminar textil, cerrando después el molde con una tapa, creándose un espacio cerrado donde aumentará el volumen del material de poliuretano a medida que va curando ocupando totalmente al final todo el espacio interior del molde. Considering the numbering adopted in the figures, the polyurethane foam pieces with textile coating are manufactured by an open mold, inside which liquid polyurethane is poured into the bottom of such mold, having previously placed in a part of such bottom a laminar body textile, then closing the mold with a lid, creating a closed space where it will increase the volume of the polyurethane material as it heals completely occupying the entire interior space of the mold.
A continuación se abre el molde retirando la tapa para extraer la pieza fabricada con la inclusión del cuerpo laminar textil unida al material de poliuretano por una parte superficial del mismo prevista previamente.  The mold is then opened by removing the cover to extract the manufactured part with the inclusion of the textile laminar body attached to the polyurethane material by a surface part thereof previously provided.
Partiendo de esta premisa, el molde abierto 1 comprende al menos una parte móvil 2 con una superficie frontal 3 sobre la que asienta una porción principal 4 de un cuerpo laminar textil 5, asegurándose la sujeción de tal porción principal 4 mediante vacio, de manera que el resto de tal cuerpo laminar textil 5 quedará dispuesto provisionalmente envolviendo a modo de faldón a esa parte móvil 2 del molde abierto 1 por zonas exteriores que no forman parte del fondo y espacio interior del conjunto del molde abierto 1.  Starting from this premise, the open mold 1 comprises at least one movable part 2 with a front surface 3 on which a main portion 4 of a textile laminar body 5 sits, ensuring that the main portion 4 is secured by means of a vacuum, so that the rest of such textile laminar body 5 will be provisionally arranged by wrapping that movable part 2 of the open mold 1 as a skirt by outer areas that are not part of the bottom and inner space of the open mold assembly 1.
La colocación previa del cuerpo laminar textil 5 sobre la parte móvil 2 del molde abierto 1 se realiza estando desplazada y desencajada dicha parte móvil 2 con respecto al resto de tal molde abierto 1, de forma que una vez asegurado el posicionamiento y sujeción mediante el vacio del cuerpo laminar textil 5 sobre la parte móvil 2 del molde abierto 1, esta parte móvil 2 se sitúa en la posición definitiva con respecto al resto del molde 1 para después verter el poliuretano liquido en el fondo del molde abierto 1, fondo que comprende la porción principal 4 del cuerpo textil 5 que cubre la superficie frontal 3 de la parte móvil 2 del molde abierto 1 y otras superficies de partes fijas del molde abierto 1 que no están cubiertas por el cuerpo laminar textil 5.  The previous placement of the textile laminar body 5 on the movable part 2 of the open mold 1 is carried out when said movable part 2 is displaced and disengaged with respect to the rest of such open mold 1, so that once the positioning and clamping by means of the vacuum is ensured of the textile laminar body 5 on the movable part 2 of the open mold 1, this movable part 2 is placed in the definitive position with respect to the rest of the mold 1 and then the liquid polyurethane is poured into the bottom of the open mold 1, bottom comprising the main portion 4 of the textile body 5 covering the front surface 3 of the movable part 2 of the open mold 1 and other surfaces of fixed parts of the open mold 1 that are not covered by the textile laminar body 5.
A continuación, tal como se ha referido anteriormente, una vez vertida la cantidad de poliuretano requerida sobre el fondo e interior del molde abierto 1, se procede a cerrar el mismo con la tapa 6, para después esperar a que el material cure aumentando de volumen ocupando todo el espacio interior del citado molde abierto 1. Then, as mentioned above, once the amount of polyurethane required has been poured on the bottom and inside of the open mold 1, it is closed with the lid 6, and then wait until The material cures increasing in volume occupying the entire interior space of said open mold 1.
Una vez que el material de poliuretano ha curado completamente, se abre el molde 1 retirando la tapa 6 y se extrae la pieza fabricada 7 que comprende el cuerpo de poliuretano 8 propiamente dicho con la incorporación del cuerpo laminar textil 5 fijado por su porción principal 4 al citado cuerpo de poliuretano 8 por una zona de adherencia 9 de la superficie exterior del cuerpo de poliuretano 8.  Once the polyurethane material has completely cured, the mold 1 is opened by removing the lid 6 and the manufactured part 7 comprising the polyurethane body 8 itself is extracted with the incorporation of the textile laminar body 5 fixed by its main portion 4 to said polyurethane body 8 by an adhesion zone 9 of the outer surface of the polyurethane body 8.
Por otro lado cabe señalar que el molde incorpora un espacio perimetral 10 alrededor de la parte móvil 2 del molde abierto 1 para alojar la parte del cuerpo laminar textil 5 dispuesta por fuera del espacio interior del molde abierto 1.  On the other hand, it should be noted that the mold incorporates a perimeter space 10 around the movable part 2 of the open mold 1 to accommodate the part of the textile laminar body 5 arranged outside the interior space of the open mold 1.
El molde abierto 1 en una primera realización como la descrita anteriormente, comprende una base formada por una única pieza perimetral 11 que rodea a la parte móvil 2, pieza perimetral 11 que junto con la parte móvil 2 incluyen la superficie interna del molde abierto 1.  The open mold 1 in a first embodiment as described above, comprises a base formed by a single perimeter piece 11 surrounding the movable part 2, perimeter piece 11 which together with the movable part 2 include the internal surface of the open mold 1.
En cambio, en una segunda realización, el molde abierto 1 ' comprende una base formada por una pieza perimetral 11' que rodea también a la parte móvil 2 y un marco postizo 12 que limita superiormente el espacio interior del molde abierto 1'.  In contrast, in a second embodiment, the open mold 1 'comprises a base formed by a perimeter piece 11' that also surrounds the movable part 2 and a false frame 12 that superiorly limits the interior space of the open mold 1 '.
Ese marco postizo 12 puede tener movimiento lineal o angular para pasar de una posición inactiva a otra activa y viceversa, correspondiendo la posición activa con la preparación del molde abierto 1 ' para recibir el material de poliuretano.  That false frame 12 can have linear or angular movement to move from an inactive position to an active one and vice versa, the active position corresponding to the preparation of the open mold 1 'to receive the polyurethane material.

Claims

REIVINDICACIONES
1.- PROCEDIMIENTO DE FABRICACIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, siendo el procedimiento de los que las piezas de poliuretano con recubrimiento textil se fabrican mediante un molde abierto, en cuyo espacio interior se vierte poliuretano liquido habiendo colocado previamente un cuerpo laminar textil (5) que se unirá por una porción principal (4) del mismo sobre una zona de adherencia (9) de la superficie externa del cuerpo de espuma de poliuretano (8); caracterizado porque en una fase inicial, previamente al vertido del poliuretano liquido en el interior del molde abierto (1-1'), la porción principal (4) del cuerpo laminar textil (5) cubre solamente una superficie frontal (3) del fondo del molde abierto (1- 1'), superficie frontal (3) incorporada en una parte móvil (2) del móvil abierto (1-1'), estando tal parte móvil (2) en esta fase inicial desplazada con respecto al resto del molde abierto (1-1'), mientras que en una fase posterior, la parte móvil (2) se moviliza para situarla en su posición definitiva en concordancia con el resto del molde abierto (1-1') para proceder después al vertido del poliuretano liquido, estando situado el resto del cuerpo laminar textil (5) por fuera del espacio interior del molde abierto (1- 1') .  1.- MANUFACTURING PROCEDURE OF POLYURETHANE FOAM PIECES WITH TEXTILE COATING, being the procedure of which the polyurethane pieces with textile coating are manufactured by an open mold, in whose interior space liquid polyurethane is poured having previously placed a laminar body textile (5) that will be joined by a main portion (4) thereof over an adhesion zone (9) of the external surface of the polyurethane foam body (8); characterized in that in an initial phase, prior to the pouring of the liquid polyurethane into the open mold (1-1 '), the main portion (4) of the textile laminar body (5) covers only a front surface (3) of the bottom of the open mold (1- 1 '), front surface (3) incorporated in a mobile part (2) of the open mobile (1-1'), such moving part (2) being in this initial phase displaced with respect to the rest of the mold open (1-1 '), while at a later stage, the movable part (2) is mobilized to place it in its final position in accordance with the rest of the open mold (1-1') to then proceed to the pouring of the polyurethane liquid, the rest of the textile laminar body (5) being located outside the inner space of the open mold (1- 1 ').
2.- PROCEDIMIENTO DE FABRICACIÓN DE PIEZAS DE ESPUMA 2.- FOAM PIECE MANUFACTURING PROCEDURE
DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según la reivindicación 1, caracterizado porque la parte exterior del cuerpo laminar textil (5) se aloja en un espacio perimetral (10) alrededor de la parte móvil (2) del molde abierto (1-1 ' ) . POLYURETHANE WITH TEXTILE COATING, according to claim 1, characterized in that the outer part of the textile laminar body (5) is housed in a perimeter space (10) around the mobile part (2) of the open mold (1-1 ').
3.- PROCEDIMIENTO DE FABRICACIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según una cualquiera de las reivindicaciones anteriores, caracterizado porque la porción principal (4) del cuerpo laminar textil (5) sobre la superficie frontal (3) de la parte móvil (2) del molde abierto ( 1-1 ' ) se asegura mediante vacio . 3. PROCEDURE FOR MANUFACTURE OF POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to any one of the preceding claims, characterized in that the main portion (4) of the textile laminar body (5) on the front surface (3) of the Moving part (2) of the open mold (1-1 ') is secured by vacuum.
4. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, que comprende una estructura de molde abierto que se cierra mediante al menos una tapa después de haber vertido en su interior poliuretano liquido, habiendo colocado previamente un cuerpo laminar textil (5) ; caracterizado porque incluye una parte móvil (2) independiente del resto del molde abierto (1-1'), parte móvil (2) que puede adoptar una posición desplazada con respecto al conjunto del molde abierto (1- 1 ' ) y una posición acorde con el resto del molde abierto (1-1') en la que se procede al vertido del material de poliuretano liquido, incluyendo tal parte móvil (2) al menos una superficie frontal (3) que forma parte del fondo del molde abierto (1-1') y sobre la cual asienta una porción principal (4) del cuerpo laminar textil (5) .  4. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, comprising an open mold structure that is closed by at least one lid after pouring liquid polyurethane inside, having previously placed a textile laminar body (5 ); characterized in that it includes a movable part (2) independent of the rest of the open mold (1-1 '), movable part (2) that can adopt a displaced position with respect to the open mold assembly (1- 1') and a corresponding position with the rest of the mold open (1-1 ') in which the liquid polyurethane material is poured, including such moving part (2) at least one front surface (3) that forms part of the bottom of the open mold (1 -1 ') and on which sits a main portion (4) of the textile laminar body (5).
5. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según la reivindicación 4, caracterizado porque la parte móvil (2) del molde abierto (1-1') tiene movilidad lineal.  5. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to claim 4, characterized in that the movable part (2) of the open mold (1-1 ') has linear mobility.
6. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según la reivindicación 4, caracterizado porque la parte móvil (2) del molde abierto (1-1') tiene movilidad angular.  6. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to claim 4, characterized in that the movable part (2) of the open mold (1-1 ') has angular mobility.
7. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según una cualquiera de las reivindicaciones 4 a 6, caracterizado porque la parte móvil (2) del molde abierto (1-1') incorpora un sistema de aspiración por vacio para sujetar la porción principal (4) del cuerpo laminar textil (5) .  7. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to any one of claims 4 to 6, characterized in that the movable part (2) of the open mold (1-1 ') incorporates a vacuum suction system to hold the main portion (4) of the textile laminar body (5).
8. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según una cualquiera de las reivindicaciones 4 a 7, caracterizado porque incorpora un espacio perimetral (10) alrededor de los laterales de la parte móvil (2) para alojar la parte del cuerpo laminar textil (5) dispuesta por fuera del espacio interior del molde abierto (1-1'). 8. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to any one of claims 4 to 7, characterized in that it incorporates a perimeter space (10) around the sides of the mobile part (2) to accommodate the part of the textile laminar body (5) arranged outside the inner space of the open mold (1-1 ').
9. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según una cualquiera de las reivindicaciones 4 a 8, caracterizado porque el molde abierto (1) incorpora una base formada por una única pieza perimetral (11) que rodea a la parte móvil (2), pieza perimetral (11) que junto con la pieza móvil (2) incluyen la superficie interna del molde abierto (1) .  9. - MOLD FOR OBTAINING POLYURETHANE FOAM PARTS WITH TEXTILE COATING, according to any one of claims 4 to 8, characterized in that the open mold (1) incorporates a base formed by a single perimeter piece (11) surrounding the moving part (2), perimeter piece (11) which together with the moving part (2) include the internal surface of the open mold (1).
10. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según una cualquiera de las reivindicaciones 4 a 8, caracterizado porque el molde abierto (1') incorpora una base formada por una pieza perimetral (11') que rodea a la parte móvil (2) y un marco postizo (12) que limita superiormente el espacio interior del molde abierto (1') .  10. - MOLD FOR OBTAINING POLYURETHANE FOAM PARTS WITH TEXTILE COATING, according to any one of claims 4 to 8, characterized in that the open mold (1 ') incorporates a base formed by a perimeter piece (11') surrounding the movable part (2) and a false frame (12) that superiorly limits the interior space of the open mold (1 ').
11. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según la reivindicación 10, caracterizado porque el marco postizo (12) es un elemento independiente con movilidad lineal.  11. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to claim 10, characterized in that the false frame (12) is an independent element with linear mobility.
12. - MOLDE PARA OBTENCIÓN DE PIEZAS DE ESPUMA DE POLIURETANO CON RECUBRIMIENTO TEXTIL, según la reivindicación 10, caracterizado porque el marco postizo (12) es un elemento independiente con movilidad angular  12. - MOLD FOR OBTAINING POLYURETHANE FOAM PIECES WITH TEXTILE COATING, according to claim 10, characterized in that the false frame (12) is an independent element with angular mobility
PCT/ES2010/070604 2010-04-21 2010-09-17 Method for manufacturing polyurethane foam parts with textile covering and mould for obtaining it WO2011131804A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201030580A ES2367620B1 (en) 2010-04-21 2010-04-21 MANUFACTURING PROCEDURE OF POLYURETHANE FOAM PARTS WITH TEXTILE COATING AND MOLD FOR OBTAINING.
ESP201030580 2010-04-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES485195A1 (en) * 1978-10-19 1980-05-16 Faure Bertrand Ind Upholstery for vehicle seat - comprises plastics foam block core inside case shaped from initially flat sheet (BE 21.4.80)
GB2114051A (en) * 1982-02-01 1983-08-17 Kaptex Moulded Products Limite Moulding fabric covered plastics foam assemblies
GB2219964A (en) * 1988-06-28 1989-12-28 Ikeda Bussan Co Method of molding skin-covered foamed article
FR2634687A1 (en) * 1988-07-27 1990-02-02 Ecia Equip Composants Ind Auto Mould for manufacturing a seat lining by foaming and lining thus produced
US5096639A (en) * 1990-03-28 1992-03-17 Woodbridge Foam Corporation Process for manufacturing a padded element

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES485195A1 (en) * 1978-10-19 1980-05-16 Faure Bertrand Ind Upholstery for vehicle seat - comprises plastics foam block core inside case shaped from initially flat sheet (BE 21.4.80)
GB2114051A (en) * 1982-02-01 1983-08-17 Kaptex Moulded Products Limite Moulding fabric covered plastics foam assemblies
GB2219964A (en) * 1988-06-28 1989-12-28 Ikeda Bussan Co Method of molding skin-covered foamed article
FR2634687A1 (en) * 1988-07-27 1990-02-02 Ecia Equip Composants Ind Auto Mould for manufacturing a seat lining by foaming and lining thus produced
US5096639A (en) * 1990-03-28 1992-03-17 Woodbridge Foam Corporation Process for manufacturing a padded element

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AR079599A1 (en) 2012-02-08
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