WO2023017194A1 - Mould for producing a polyurethane sole and method for using same - Google Patents

Mould for producing a polyurethane sole and method for using same Download PDF

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Publication number
WO2023017194A1
WO2023017194A1 PCT/ES2021/070609 ES2021070609W WO2023017194A1 WO 2023017194 A1 WO2023017194 A1 WO 2023017194A1 ES 2021070609 W ES2021070609 W ES 2021070609W WO 2023017194 A1 WO2023017194 A1 WO 2023017194A1
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WO
WIPO (PCT)
Prior art keywords
plate
perforation
hole
recess
face
Prior art date
Application number
PCT/ES2021/070609
Other languages
Spanish (es)
French (fr)
Inventor
José Mari IZQUIETA ANAUT
Original Assignee
Desarrollo Integral Del Molde, 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 Desarrollo Integral Del Molde, S.L. filed Critical Desarrollo Integral Del Molde, S.L.
Priority to PCT/ES2021/070609 priority Critical patent/WO2023017194A1/en
Publication of WO2023017194A1 publication Critical patent/WO2023017194A1/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
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds

Definitions

  • the present invention is encompassed in the field of molds for making shoe soles and the procedure for using said molds, specifically those in which polyurethane is used.
  • Polyurethane is a polymeric material that has been used in the manufacture of shoe soles for a long time, as it lightens the rubber used in the past. Polyurethane is formed by the reaction of its components, polyol and isocyanate, which produces gases.
  • the molds provide gas outlets to facilitate the complete filling of the cavity.
  • the increasing inclusion of protuberances in the soles to provide comfort in the tread means that the usual gas outlets are insufficient, while the protuberances are becoming more complicated day by day, having complex shapes, with an increasingly thin thickness. , and in greater number throughout the length and width of the sole .
  • Patent EP3808522A1 is known in which the mold and the procedure to make a sole by agglutination of particles by an electromagnetic field and that uses the vacuum to help in the filling of the mold, as in the patent EP3338984A2.
  • Patent WO202046717A1 exposes the use of vacuum to improve the filling of a polyurethane shoe sole, without going into details of the configuration of the mold.
  • the object of the invention is a mold and its use procedure for making a polyurethane sole that allows the escape of gases and, therefore, the complete filling of the sole.
  • the technical problem to be solved is to configure the elements of the mold and establish the stages of the procedure to achieve the outlet of the gases that are the object of the invention.
  • the present invention refers to a mold for making a polyurethane sole, the mold comprises a lower plate with a first face that includes a first footprint of the sole, as is known in the state of the technique, that sometimes the lower plate is the complete mold, on other occasions a counter plate or cover is arranged.
  • footprint is meant the imprint or casting of the metal from the mold to create the cavity with the negative of the piece to be formed.
  • the lower part is female and the upper part, when it exists, as a male, although it could be the other way around.
  • the mold is characterized by the fact that it also comprises an intermediate plate after the lower plate and an upper plate after the intermediate plate;
  • the intermediate plate comprises a second face facing the first face and a third face facing a fourth face of the upper plate, a second tread of the sole on the second face, the first and second tread thus forming the cavity for the sole, at least one indentation in the second tread that goes towards the third face, which corresponds to what will be a protuberance of the sole, at least one perforation in the third face that goes towards the second face, the indentation and the perforation they are in a hole;
  • the intermediate plate also includes an opening towards the second face and a recess in the opening in correspondence with the perforation;
  • the upper plate includes a punch or male mold that is inserted into the hole that it makes, the punch, a first contact of between 0.15 mm and 0.25 mm with said hole around the perforation, as a closure, and there is a first separation between the punch and the intermediate plate;
  • the top plate
  • An advantage in line with the object of the invention is that a conduction is created from an area of the mold, the recess in the second footprint, to the outside of the mold, with which a gas outlet is achieved.
  • Another advantage is that the first contact allows the gases to escape but not the polyurethane to escape, so no burrs are created, the sole has its correct shape without excess material, which would also imply an additional operation to remove said material. excess .
  • the invention refers to a procedure for using a mold to make a polyurethane sole as described above, which is characterized in that it comprises the following stages:
  • the cavity that makes up the sole is completely filled with polyurethane thanks to the vacuum
  • the polyurethane also fills the hole, the perforation and the recess and only those configurations thanks to the first contact, which allows the gases to pass, but not the polyurethane; the hole, perforation and recess are accessed by opening the upper plate, these are separated from the formed sole, which is ready for use without excess material to be removed.
  • Figure 1 represents a profile view of the mold of the invention, in figure 2 said mold shows the three plates that make it up separated by rotation.
  • Figure 3 represents a plan view of the lower plate of the mold of Figure 1
  • Figures 4 and 5 both faces of the intermediate plate
  • Figure 6 a perspective view of the upper plate.
  • Figure 7 represents a profile view of a longitudinal section of the mold of Figure 1 and Figure 8 a cross section of figure 7, indicated by arrows in this figure.
  • Figure 1 shows a mold for making a polyurethane sole in a closed state
  • the mold comprises a lower plate (1) with a first face (1.1) that includes a first footprint (1.2), Figures 2 and 3, of the sole, an intermediate plate (2) after the lower plate (1) and an upper plate (3) after the intermediate plate (2);
  • the intermediate plate (2) comprises a second face (2.1) facing the first face (1.1) and a third face (2.3) facing a fourth face (3.1) of the upper plate (3), Figure 2, where the mold it is partially open by rotation thanks to a double hinge between the plates (1,2,3), which is common in sole molds for footwear.
  • Figure 4 shows a second tread (2.2) of the sole on the second face (2.1), at least one recess (2.4) in the second tread (2.2) that goes towards the third face (2.3), on the sole shown, the recesses (2.4) are three in the front part, those on the sides are curved and the central one is straight, and two, straight, in the rear part, as an example, although they could be arranged in any other configuration; the recess (2.4) can be seen clearly in the section of figure 8.
  • the intermediate plate (2) includes at least one perforation (2.6), several in different groups in Figure 5, on the third face (2.3) that goes towards the second face (2.1), the recess (2.4) and the perforation (2.6) if found in a hole (2.5), in the section of figure 8 four recesses (2.4) with their corresponding perforations (2.6) and holes (2.5) are shown; the intermediate plate (2) also includes a recess (2.7) towards the second face (2.1) and a recess (2.8) in the recess
  • the upper plate (3) includes a punch (3.2), Figure 6, which is inserted into the hole (2.7), Figures 7 and 8, which makes a first contact (3.3), Figures 7 and 8, of between 0.15 mm and 0.25 mm with said hollowing (2.7) around the perforation (2.6) and there is a first separation (3.4) between the punch (3.2) and the intermediate plate (2), figures 7 and 8;
  • the upper plate (3) includes a conduit (3.6) in communication with the first separation (3.4), Figure 8, represented by dashed lines; between the first plate (1) and the second plate (2) a second contact (1.3) is established in which first sealing means (4) are arranged, figures 7 and 8; between the second plate (2) and the third plate (3) a third contact (3.5) is established in which second sealing means (5) are arranged, figures 7 and 8.
  • first sealing means (4) and the second sealing means (5) each are O-rings, known elements that work correctly and are available on the market.
  • the perforation (2.6) is between 3 mm and 8 mm high, which has been verified as working correctly.
  • the perforation (2.6) is a cone followed by a cylinder that configures the hole (2.5), an embodiment shown in figure 8, configurations that are easy to execute in a mold and that have been found to work well for the transit of gases;
  • the measurements can be that the cone has a height of 4 mm and the cylinder has a height of 1 mm, verified and that they work correctly.
  • the procedure for using a mold such as the one described for making a polyurethane sole comprises the following stages:
  • the perforation (2.6) is a 4 mm high cone followed by a 1 mm high cylinder that configures the hole (2.5), in the removal of the polyurethane from the hole (2.5), from the perforation (2.6), and of the recess (2.8), the polyurethane of the hole (2.5), of the perforation (2.6), and of the recess (2.8) is separated from the polyurethane of the recess (2.4).
  • this separation is done manually, that is, it breaks by itself, without the need for cutting or separation means, which favors the process as it can be done completely manually or easily automated.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Disclosed is a mould and method for using same to produce a polyurethane sole that allows the outlet of gases. The mould comprises a bottom plate, an intermediate plate and a top plate. The intermediate plate comprises a recess and a perforation, both of which are located in a hole, and a hollow and a depression in same. The bottom plate comprises a first contact measuring 0.15-0.25 mm, in contact with the hollow around the perforation, and a first gap. The top plate includes a duct in communication with the first gap. First sealing means are disposed between the first plate and the second plate, and second sealing means are disposed between the second plate and the third plate. In the method, a space is made for the outlet of gases to the first gap, which connects to the first contact, the perforation and the hole until the entrance.

Description

MOLDE PARA ELABORACIÓN DE UNA SUELA DE POLIURETANO Y PROCEDIMIENTO DE UTILIZACIÓN DEL MISMO MOLD FOR THE PRODUCTION OF A POLYURETHANE SOLE AND PROCEDURE FOR USE OF THE SAME
CAMPO TÉCNICO DE LA INVENCIÓN TECHNICAL FIELD OF THE INVENTION
La presente invención se engloba en el campo de los moldes para elaboración de suelas de cal zado y el procedimiento de utili zación dichos moldes , en concreto en los que se utili za poliuretano . The present invention is encompassed in the field of molds for making shoe soles and the procedure for using said molds, specifically those in which polyurethane is used.
ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION
El poliuretano es un material polimérico que se utili za en la elaboración de suelas de cal zado desde hace tiempo , pues aligera el caucho utili zado antaño . El poliuretano se forma por la reacción de sus componentes , poliol e isocianato , que produce gases . Polyurethane is a polymeric material that has been used in the manufacture of shoe soles for a long time, as it lightens the rubber used in the past. Polyurethane is formed by the reaction of its components, polyol and isocyanate, which produces gases.
La producción de gases en la reacción del poliuretano es un incoveniente en el llenado de moldes , puesto que puede hacer que una cavidad del molde no se llene al estar ocupada parcialemente por estos gases . The production of gases in the polyurethane reaction is a drawback in mold filling, since it can cause a mold cavity to not fill when partially occupied by these gases.
Por ello , en los moldes se prevén salidas de gases para facilitar el llenado completo de la cavidad . Ahora bien, la creciente inclusión de protuberancias en las suelas para aportar comodidad en la pisada hace que las salidas de gases habituales sean insuficientes , en tanto que las protuberancias se van complicando dia a dia , teniendo formas complej as , de espesor cada vez más fino , y en mayor número a lo largo y ancho de la suela . For this reason, the molds provide gas outlets to facilitate the complete filling of the cavity. However, the increasing inclusion of protuberances in the soles to provide comfort in the tread means that the usual gas outlets are insufficient, while the protuberances are becoming more complicated day by day, having complex shapes, with an increasingly thin thickness. , and in greater number throughout the length and width of the sole .
Se conoce la patente EP3808522A1 en la que se expone el molde y el procedimiento para elaborar una suela por aglutinamiento de partículas por un campo electromagnético y que utili za el vacio para ayudar en el llenado del molde , al igual que en la patente EP3338984A2 . En la patente WO202046717A1 se expone el uso del vacio para mej orar el llenado de una suela de cal zado en poliuretanto , sin entrar en detalles de la configuración del molde . The patent EP3808522A1 is known in which the mold and the procedure to make a sole by agglutination of particles by an electromagnetic field and that uses the vacuum to help in the filling of the mold, as in the patent EP3338984A2. Patent WO202046717A1 exposes the use of vacuum to improve the filling of a polyurethane shoe sole, without going into details of the configuration of the mold.
DESCRIPCIÓN DE LA INVENCIÓN DESCRIPTION OF THE INVENTION
La presente invención queda establecida y caracteri zada en las reivindicaciones independientes , mientras que las reivindicaciones dependientes describen otras características de la misma . The present invention is established and characterized in the independent claims, while the dependent claims describe other features thereof.
El obj eto de la invención es un molde y su procedimiento de utili zación para elaboración de una suela de poliuretano que permita la salida de gases y, por lo tanto , el llenado completo de la suela . El problema técnico a resolver es configurar los elementos del molde y establecer las etapas del procedimiento para conseguir la salida de gases obj eto de la invención . The object of the invention is a mold and its use procedure for making a polyurethane sole that allows the escape of gases and, therefore, the complete filling of the sole. The technical problem to be solved is to configure the elements of the mold and establish the stages of the procedure to achieve the outlet of the gases that are the object of the invention.
A la vista de lo anteriormente enunciado , la presente invención se refiere a un molde para elaboración de una suela de poliuretano , el molde comprende una placa inferior con una primera cara que incluye una primera huella de la suela, como es conocido en el estado de la técnica, que en ocasiones la placa inferior es el molde completo , en otras ocasiones se dispone una contraplaca o tapa . In view of the above statement, the present invention refers to a mold for making a polyurethane sole, the mold comprises a lower plate with a first face that includes a first footprint of the sole, as is known in the state of the technique, that sometimes the lower plate is the complete mold, on other occasions a counter plate or cover is arranged.
Con las denomaciones espaciales " inferior" , " superior" y similares se quiere signi ficar las posiciones habituales de un molde en uso para elaboración de suelas de poliuretano apoyado sobre una superficie . With the spatial denominations "lower", "upper" and the like, it is meant the usual positions of a mold in use for manufacturing polyurethane soles resting on a surface.
Con "huella" se quiere signi ficar la impronta o vaciado del metal del molde para crear la cavidad con el negativo de la pieza a formar . En los moldes de suelas es habitual que la parte inferior sea a modo de hembra y la parte superior, cuando existe , a modo de macho , aunque pudiera ser al contrario . With "footprint" is meant the imprint or casting of the metal from the mold to create the cavity with the negative of the piece to be formed. In sole molds it is common for the lower part to be female and the upper part, when it exists, as a male, although it could be the other way around.
Caracteri za al molde el que además comprende una placa intermedia a continuación de la placa inferior y una placa superior a continuación de la placa intermedia ; la placa intermedia comprende una segunda cara enfrentada a la primera cara y una tercera cara enfrentada a una cuarta cara de la placa superior, una segunda huella de la suela en la segunda cara, formando asi la primera y segunda huella la cavidad para la suela, al menos un entrante en la segunda huella que se dirige hacia la tercera cara, que se corresponde con lo que será una protuberancia de la suela, al menos una perforación en la tercera cara que se dirige hacia la segunda cara, el entrante y la perforación se encuentran en un ori ficio ; la placa intermedia además comprende un vaciado hacia la segunda cara y un rebaj e en el vaciado en correspondencia con la perforación; la placa superior incluye un punzón o macho de molde que queda introducido en el vaciado que hace , el punzón, un primer contacto de entre 0 , 15 mm y 0 , 25 mm con dicho vaciado alrededor de la perforación, a modo de cierre , y queda una primera separación entre el punzón y la placa intermedia ; la placa superior incluye un conducto en comunicación con la primera separación; entre la primera placa y la segunda placa se establece un segundo contacto en el que se disponen unos primeros medios de estanqueidad; entre la segunda placa y la tercera placa se establece un tercer contacto en el que se disponen unos segundos medios de estanqueidad . The mold is characterized by the fact that it also comprises an intermediate plate after the lower plate and an upper plate after the intermediate plate; the intermediate plate comprises a second face facing the first face and a third face facing a fourth face of the upper plate, a second tread of the sole on the second face, the first and second tread thus forming the cavity for the sole, at least one indentation in the second tread that goes towards the third face, which corresponds to what will be a protuberance of the sole, at least one perforation in the third face that goes towards the second face, the indentation and the perforation they are in a hole; the intermediate plate also includes an opening towards the second face and a recess in the opening in correspondence with the perforation; The upper plate includes a punch or male mold that is inserted into the hole that it makes, the punch, a first contact of between 0.15 mm and 0.25 mm with said hole around the perforation, as a closure, and there is a first separation between the punch and the intermediate plate; the top plate includes a conduit in communication with the first gap; between the first plate and the second plate a second contact is established in which they have first sealing means; between the second plate and the third plate a third contact is established in which second sealing means are arranged.
Una ventaj a en linea con el obj eto de la invención es que se crea una conducción desde una zona del molde , el entrante en la segunda huella, hasta el exterior del molde , con lo que se consigue una salida de gases . An advantage in line with the object of the invention is that a conduction is created from an area of the mold, the recess in the second footprint, to the outside of the mold, with which a gas outlet is achieved.
Otra ventaj a es que el primer contacto permite la salida de gases pero no la salida de poliuretano , con lo que no se crean rebabas , la suela tiene su forma j usta sin exceso de material , que además implicarla una operación adicional de retirada de dicho exceso . Another advantage is that the first contact allows the gases to escape but not the polyurethane to escape, so no burrs are created, the sole has its correct shape without excess material, which would also imply an additional operation to remove said material. excess .
Asimismo , la invención se refiere a un procedimiento de utili zación de un molde para elaboración de una suela de poliuretano según se ha expuesto aqui arriba, que se caracteri za por que comprende las siguientes etapas : Likewise, the invention refers to a procedure for using a mold to make a polyurethane sole as described above, which is characterized in that it comprises the following stages:
- conexión del conducto con un equipo generador de vacio ;- connection of the duct with a vacuum generating equipment;
- introducción del poliuretano por inyección o colada a la primera huella de la placa inferior ; - introduction of the polyurethane by injection or casting to the first impression of the lower plate;
- cierre del molde al poner en contacto la placa inferior con la placa intermedia y ésta con la placa superior ; - closing of the mold by bringing the lower plate into contact with the intermediate plate and the latter with the upper plate;
- introducción del vacio por el conducto pasando por la primera separación, el primer contacto , la perforación, el ori ficio , hasta el entrante ; espumación del poliuretano de manera que los gases generados en el entrante son expulsados por la acción del vacio a través del ori ficio produciéndose el llenado completo del entrante , as i como del ori ficio de la perforación, y del rebaj e ; - abertura de la placa superior; - Introduction of the vacuum through the conduit passing through the first separation, the first contact, the perforation, the hole, up to the recess; foaming of the polyurethane so that the gases generated in the inlet are expelled by the action of the vacuum through the orifice, producing the complete filling of the inlet, as well as the perforation orifice, and the recess; - top plate opening;
- retirada del poliuretano del orificio, de la perforación, y del rebaje; - removing the polyurethane from the hole, from the perforation, and from the recess;
- abertura de la placa intermedia; - opening of the intermediate plate;
- retirada de la suela formada. - removal of the formed sole.
En pocas palabras, la cavidad que conforma la suela se llena completamente de poliuretano gracias al vacio, el poliuretano llena además el orificio la perforación y el rebaje y sólo esas configuraciones gracias al primer contacto, que deja pasar los gases, pero no el poliuretano; al orificio, la perforación y el rebaje se accede al abrir la placa superior, éstos se separan de la suela formada, la cual queda lista para su utilización sin material sobrante que haya que retirar. In short, the cavity that makes up the sole is completely filled with polyurethane thanks to the vacuum, the polyurethane also fills the hole, the perforation and the recess and only those configurations thanks to the first contact, which allows the gases to pass, but not the polyurethane; the hole, perforation and recess are accessed by opening the upper plate, these are separated from the formed sole, which is ready for use without excess material to be removed.
BREVE DESCRIPCIÓN DE LAS FIGURAS BRIEF DESCRIPTION OF THE FIGURES
Se complementa la presente memoria descriptiva, con un juego de figuras, ilustrativas del ejemplo preferente, y nunca limitativas de la invención. This descriptive memory is complemented with a set of figures, illustrative of the preferred example, and never limiting of the invention.
La figura 1 representa una vista de perfil del molde de la invención, en la figura 2 dicho molde muestra las tres placas que lo componen separadas por rotación. Figure 1 represents a profile view of the mold of the invention, in figure 2 said mold shows the three plates that make it up separated by rotation.
La figura 3 representa una vista en planta de la placa inferior del molde de la figura 1, las figuras 4 y 5 ambas caras de la placa intermedia y la figura 6 una vista en perspectiva de la placa superior. Figure 3 represents a plan view of the lower plate of the mold of Figure 1, Figures 4 and 5 both faces of the intermediate plate and Figure 6 a perspective view of the upper plate.
La figura 7 representa una vista de perfil de una sección longitudinal del molde de la figura 1 y la figura 8 una sección transversal de la figura 7, indicada con flechas en esta figura. Figure 7 represents a profile view of a longitudinal section of the mold of Figure 1 and Figure 8 a cross section of figure 7, indicated by arrows in this figure.
EXPOSICIÓN DETALLADA DE LA INVENCIÓN DETAILED DISCLOSURE OF THE INVENTION
En la figura 1 se muestra un molde para elaboración de una suela de poliuretano en estado cerrado, el molde comprende una placa inferior (1) con una primera cara (1.1) que incluye una primera huella (1.2) , figuras 2 y 3, de la suela, una placa intermedia (2) a continuación de la placa inferior (1) y una placa superior (3) a continuación de la placa intermedia (2) ; la placa intermedia (2) comprende una segunda cara (2.1) enfrentada a la primera cara (1.1) y una tercera cara (2.3) enfrentada a una cuarta cara (3.1) de la placa superior (3) , figura 2, donde el molde está parcialmente abierto por giro gracias a una doble bisagra entre las placas (1,2,3) , lo cual es habitual en los moldes de suela para calzado. Figure 1 shows a mold for making a polyurethane sole in a closed state, the mold comprises a lower plate (1) with a first face (1.1) that includes a first footprint (1.2), Figures 2 and 3, of the sole, an intermediate plate (2) after the lower plate (1) and an upper plate (3) after the intermediate plate (2); The intermediate plate (2) comprises a second face (2.1) facing the first face (1.1) and a third face (2.3) facing a fourth face (3.1) of the upper plate (3), Figure 2, where the mold it is partially open by rotation thanks to a double hinge between the plates (1,2,3), which is common in sole molds for footwear.
En la figura 4 se muestra una segunda huella (2.2) de la suela en la segunda cara (2.1) , al menos un entrante (2.4) en la segunda huella (2.2) que se dirige hacia la tercera cara (2.3) , en la suela mostrada los entrantes (2.4) son tres en la parte anterior, combados los de los lados y recto el central, y dos, rectos, en la posterior, a modo de ejemplo aunque pudieran disponerse en cualquier otra configuración; el entrante (2.4) se aprecia con claridad en la sección de la figura 8. Figure 4 shows a second tread (2.2) of the sole on the second face (2.1), at least one recess (2.4) in the second tread (2.2) that goes towards the third face (2.3), on the sole shown, the recesses (2.4) are three in the front part, those on the sides are curved and the central one is straight, and two, straight, in the rear part, as an example, although they could be arranged in any other configuration; the recess (2.4) can be seen clearly in the section of figure 8.
La placa intermedia (2) incluye al menos una perforación (2.6) , varias en diferentes grupos en la figura 5, en la tercera cara (2.3) que se dirige hacia la segunda cara (2.1) , el entrante (2.4) y la perforación (2.6) se encuentran en un orificio (2.5) , en la sección de la figura 8 se muestran cuatro entrantes (2.4) con sus correspondientes perforaciones (2.6) y orificios (2.5) ; la placa intermedia (2) además comprende un vaciado (2.7) hacia la segunda cara (2.1) y un rebaje (2.8) en el vaciadoThe intermediate plate (2) includes at least one perforation (2.6), several in different groups in Figure 5, on the third face (2.3) that goes towards the second face (2.1), the recess (2.4) and the perforation (2.6) if found in a hole (2.5), in the section of figure 8 four recesses (2.4) with their corresponding perforations (2.6) and holes (2.5) are shown; the intermediate plate (2) also includes a recess (2.7) towards the second face (2.1) and a recess (2.8) in the recess
(2.7) en correspondencia con la perforación (2.6) , figura 5, en la realización mostrada se incluyen dos rebajes(2.7) in correspondence with the perforation (2.6), figure 5, in the shown embodiment two recesses are included
(2.8) , cada uno de los cuales agrupa varias perforaciones (2.6) ; la placa superior (3) incluye un punzón (3.2) , figura 6, que queda introducido en el vaciado (2.7) , figuras 7 y 8, que hace un primer contacto (3.3) , figuras 7 y 8, de entre 0,15 mm y 0,25 mm con dicho vaciado (2.7) alrededor de la perforación (2.6) y queda una primera separación (3.4) entre el punzón (3.2) y la placa intermedia (2) , figuras 7 y 8; la placa superior (3) incluye un conducto (3.6) en comunicación con la primera separación (3.4) , figura 8, representado por linea de trazos; entre la primera placa (1) y la segunda placa (2) se establece un segundo contacto (1.3) en el que se disponen unos primeros medios de estanqueidad (4) , figuras 7 y 8; entre la segunda placa (2) y la tercera placa (3) se establece un tercer contacto (3.5) en el que se disponen unos segundos medios de estanqueidad (5) , figuras 7 y 8. (2.8) , each one of which groups several perforations (2.6) ; The upper plate (3) includes a punch (3.2), Figure 6, which is inserted into the hole (2.7), Figures 7 and 8, which makes a first contact (3.3), Figures 7 and 8, of between 0.15 mm and 0.25 mm with said hollowing (2.7) around the perforation (2.6) and there is a first separation (3.4) between the punch (3.2) and the intermediate plate (2), figures 7 and 8; the upper plate (3) includes a conduit (3.6) in communication with the first separation (3.4), Figure 8, represented by dashed lines; between the first plate (1) and the second plate (2) a second contact (1.3) is established in which first sealing means (4) are arranged, figures 7 and 8; between the second plate (2) and the third plate (3) a third contact (3.5) is established in which second sealing means (5) are arranged, figures 7 and 8.
Una opción ventajosa es que los primeros medios de estanqueidad (4) y los segundos medios de estanqueidad (5) son sendas juntas tóricas, elementos conocidos que funcionan correctamente y disponibles en el mercado. An advantageous option is that the first sealing means (4) and the second sealing means (5) each are O-rings, known elements that work correctly and are available on the market.
Un detalle de la perforación (2.6) es que sea de una altura de entre 3 mm y 8 mm, lo cual se ha comprobado como que funciona correctamente. Otra opción es que la perforación (2.6) sea un cono seguido de un cilindro que configura el orificio (2.5) , realización mostrada en la figura 8, configuraciones de fácil ejecución en un molde y que se ha comprobado que funcionan bien para el tránsito de gases; en concreto, las medidas pueden ser que el cono tiene una altura de 4 mm y el cilindro tiene una altura de 1 mm, comprobadas y que funcionan correctamente . One detail of the perforation (2.6) is that it is between 3 mm and 8 mm high, which has been verified as working correctly. Another option is that the perforation (2.6) is a cone followed by a cylinder that configures the hole (2.5), an embodiment shown in figure 8, configurations that are easy to execute in a mold and that have been found to work well for the transit of gases; Specifically, the measurements can be that the cone has a height of 4 mm and the cylinder has a height of 1 mm, verified and that they work correctly.
El procedimiento de utilización de un molde como el descrito para elaboración de una suela de poliuretano comprende las siguientes etapas: The procedure for using a mold such as the one described for making a polyurethane sole comprises the following stages:
- conexión del conducto (3.6) con un equipo generador de vacio, no mostrado en las figuras pero que puede ser cualquiera de los conocidos; - Connection of the conduit (3.6) with a vacuum generating equipment, not shown in the figures but which can be any of the known ones;
-introducción del poliuretano por inyección o colada a la primera huella (1.2) de la placa inferior (1) ; -Introduction of the polyurethane by injection or casting to the first tread (1.2) of the lower plate (1);
- cierre del molde al poner en contacto la placa inferior (1) con la placa intermedia (2) y ésta con la placa superior ( 3 ) ; - closing the mold by bringing the lower plate (1) into contact with the intermediate plate (2) and this with the upper plate (3);
- introducción del vacio por el conducto (3.6) pasando por la primera separación (3.4) , el primer contacto (3.3) , la perforación (2.6) , el orificio (2.5) , hasta el entrante- Introduction of the vacuum through the conduit (3.6) passing through the first separation (3.4), the first contact (3.3), the perforation (2.6), the hole (2.5), up to the recess
(2.4) ; espumación del poliuretano de manera que los gases generados en el entrante (2.4) son expulsados por la acción del vacio a través del orificio (2.5) produciéndose el llenado completo del entrante (2.4) , asi como del orificio(2.4) ; foaming of the polyurethane so that the gases generated in the inlet (2.4) are expelled by the action of the vacuum through the hole (2.5) producing the complete filling of the inlet (2.4), as well as the hole
(2.5) , de la perforación (2.6) , y del rebaje (2.8) ; (2.5), perforation (2.6), and recess (2.8);
- abertura de la placa superior (3) ; retirada del poliuretano del orificio (2.5) , de la perforación (2.6) , y del rebaje (2.8) ; - opening of the upper plate (3) ; removal of the polyurethane from the hole (2.5), from the perforation (2.6), and from the recess (2.8);
- abertura de la placa intermedia (2) ; - retirada de la suela formada. - opening of the intermediate plate (2) ; - removal of the formed sole.
Una opción en el procedimiento es que la perforación (2.6) es un cono de altura 4 mm seguido de un cilindro de altura de 1 mm que configura el orificio (2.5) , en la retirada del poliuretano del orificio (2.5) , de la perforación (2.6) , y del rebaje (2.8) , el poliuretano del orificio (2.5) , de la perforación (2.6) , y del rebaje (2.8) queda separado del poliuretano del entrante (2.4) . Normalmente esta separación se hace manualmente, es decir, se rompe por si solo, sin necesidad de unos medios de corte o separación, lo que favorece el proceso al poderlo hacer completamente manual o automatizarse de manera sencilla. One option in the procedure is that the perforation (2.6) is a 4 mm high cone followed by a 1 mm high cylinder that configures the hole (2.5), in the removal of the polyurethane from the hole (2.5), from the perforation (2.6), and of the recess (2.8), the polyurethane of the hole (2.5), of the perforation (2.6), and of the recess (2.8) is separated from the polyurethane of the recess (2.4). Normally this separation is done manually, that is, it breaks by itself, without the need for cutting or separation means, which favors the process as it can be done completely manually or easily automated.

Claims

REIVINDICACIONES
1. -Molde para elaboración de una suela de poliuretano, el molde comprende una placa inferior (1) con una primera cara (1.1) que incluye una primera huella (1.2) de la suela, caracterizado por que además comprende una placa intermedia (2) a continuación de la placa inferior (1) y una placa superior (3) a continuación de la placa intermedia (2) ; la placa intermedia (2) comprende una segunda cara (2.1) enfrentada a la primera cara (1.1) y una tercera cara (2.3) enfrentada a una cuarta cara (3.1) de la placa superior (3) ; una segunda huella (2.2) de la suela en la segunda cara (2.1) , al menos un entrante (2.4) en la segunda huella (2.2) que se dirige hacia la tercera cara (2.3) , al menos una perforación (2.6) en la tercera cara (2.3) que se dirige hacia la segunda cara (2.1) , el entrante (2.4) y la perforación (2.6) se encuentran en un orificio (2.5) ; la placa intermedia (2) además comprende un vaciado (2.7) hacia la segunda cara (2.1) y un rebaje (2.8) en el vaciado (2.7) en correspondencia con la perforación (2.6) ; la placa superior (3) incluye un punzón (3.2) que queda introducido en el vaciado (2.7) que hace un primer contacto (3.3) de entre 0,15 mm y 0,25 mm con dicho vaciado (2.7) alrededor de la perforación (2.6) y queda una primera separación (3.4) entre el punzón (3.2) y la placa intermedia (2) ; la placa superior (3) incluye un conducto (3.6) en comunicación con la primera separación (3.4) ; entre la primera placa (1) y la segunda placa (2) se establece un segundo contacto (1.3) en el que se disponen unos primeros medios de estanqueidad (4) ; entre la segunda placa (2) y la tercera placa (3) se establece un tercer contacto (3.5) en el que se disponen unos segundos medios de estanqueidad (5) . 1. -Mold for making a polyurethane sole, the mold comprises a lower plate (1) with a first face (1.1) that includes a first imprint (1.2) of the sole, characterized in that it also comprises an intermediate plate (2 ) after the lower plate (1) and an upper plate (3) after the intermediate plate (2); the intermediate plate (2) comprises a second face (2.1) facing the first face (1.1) and a third face (2.3) facing a fourth face (3.1) of the upper plate (3); a second tread (2.2) of the sole on the second face (2.1), at least one recess (2.4) in the second tread (2.2) that goes towards the third face (2.3), at least one perforation (2.6) on the third face (2.3) that is directed towards the second face (2.1), the recess (2.4) and the perforation (2.6) are in a hole (2.5); the intermediate plate (2) also includes a hole (2.7) towards the second face (2.1) and a recess (2.8) in the hole (2.7) in correspondence with the perforation (2.6); The upper plate (3) includes a punch (3.2) that remains inserted into the hole (2.7) that makes a first contact (3.3) of between 0.15 mm and 0.25 mm with said hole (2.7) around the perforation. (2.6) and there is a first separation (3.4) between the punch (3.2) and the intermediate plate (2); the upper plate (3) includes a conduit (3.6) in communication with the first separation (3.4); between the first plate (1) and the second plate (2) a second contact (1.3) is established in which first sealing means (4) are arranged; between the second plate (2) and the third plate (3) a third contact (3.5) is established in which second sealing means (5) are arranged.
2. -Molde según la reivindicación 1 en el que los primeros medios de estanqueidad (4) y los segundos medios de estanqueidad (5) son sendas juntas tóricas. 2. -Mold according to claim 1, in which the first sealing means (4) and the second sealing means (5) are O-rings.
3. -Molde según la reivindicación 1 en el que la perforación3. -Mold according to claim 1 in which the perforation
(2.6) es de una altura entre 3 mm y 8 mm. (2.6) is of a height between 3 mm and 8 mm.
4. -Molde según la reivindicación 1 en el que la perforación (2.6) es un cono seguido de un cilindro que configura el orificio (2.5) . 4. -Mold according to claim 1 in which the perforation (2.6) is a cone followed by a cylinder that configures the hole (2.5).
5. -Molde según la reivindicación 4 en el que el cono tiene una altura de 4 mm y el cilindro tiene una altura de 1 rom. 5. -Mold according to claim 4 in which the cone has a height of 4 mm and the cylinder has a height of 1 rom.
6. -Procedimiento de utilización de un molde para elaboración de una suela de poliuretano según la reivindicación 1 caracterizado por que comprende las siguientes etapas: 6. -Procedure for using a mold to make a polyurethane sole according to claim 1, characterized in that it comprises the following stages:
- conexión del conducto (3.6) con un equipo generador de vacio ; - connection of the conduit (3.6) with a vacuum generating equipment;
- introducción del poliuretano por inyección o colada a la primera huella (1.2) de la placa inferior (1) ; - introduction of the polyurethane by injection or casting to the first tread (1.2) of the lower plate (1);
- cierre del molde al poner en contacto la placa inferior (1) con la placa intermedia (2) y ésta con la placa superior ( 3 ) ; - closing the mold by bringing the lower plate (1) into contact with the intermediate plate (2) and this with the upper plate (3);
- introducción del vacio por el conducto (3.6) pasando por la primera separación (3.4) , el primer contacto (3.3) , la perforación (2.6) , el orificio (2.5) , hasta el entrante (2.4) ; - Introduction of the vacuum through the conduit (3.6) passing through the first separation (3.4), the first contact (3.3), the perforation (2.6), the hole (2.5), up to the recess (2.4);
- espumación del poliuretano de manera que los gases generados en el entrante (2.4) son expulsados por la acción del vacio a través del orificio (2.5) produciéndose el llenado completo del entrante (2.4) , así como del orificio (2.5) , de la perforación (2.6) , y del reba j e (2.8) ; - foaming of the polyurethane so that the gases generated in the inlet (2.4) are expelled by the action of the vacuum through the hole (2.5) producing the complete filling of the recess (2.4), as well as the hole (2.5), the perforation (2.6), and the recess (2.8);
- abertura de la placa superior (3) ; - retirada del poliuretano del orificio (2.5) , de la perforación (2.6) , y del rebaje (2.8) ; - opening of the upper plate (3) ; - removal of the polyurethane from the hole (2.5), from the perforation (2.6), and from the recess (2.8);
- abertura de la placa intermedia (2) ; - opening of the intermediate plate (2) ;
- retirada de la suela formada. - removal of the formed sole.
7. -Procedimiento según la reivindicación 6 en el que la perforación (2.6) es un cono de altura 4 mm seguido de un cilindro de altura de 1 mm que configura el orificio (2.5) , en la retirada del poliuretano del orificio (2.5) , de la perforación (2.6) , y del rebaje (2.8) , el poliuretano del orificio (2.5) , de la perforación (2.6) , y del rebaje (2.8) queda separado del poliuretano del entrante (2.4) . 7. -Process according to claim 6 in which the perforation (2.6) is a 4 mm high cone followed by a 1 mm high cylinder that configures the hole (2.5), in the removal of the polyurethane from the hole (2.5) , of the perforation (2.6), and of the recess (2.8), the polyurethane of the hole (2.5), of the perforation (2.6), and of the recess (2.8) is separated from the polyurethane of the recess (2.4).
PCT/ES2021/070609 2021-08-12 2021-08-12 Mould for producing a polyurethane sole and method for using same WO2023017194A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017035644A1 (en) * 2015-08-31 2017-03-09 Proprietect L.P. Vented mold
CN111391205A (en) * 2020-03-31 2020-07-10 蔡庆忠 Sole forming die and method for manufacturing soft elastic sole by using same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017035644A1 (en) * 2015-08-31 2017-03-09 Proprietect L.P. Vented mold
CN111391205A (en) * 2020-03-31 2020-07-10 蔡庆忠 Sole forming die and method for manufacturing soft elastic sole by using same

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