ES2356758B1

ES2356758B1 - COMPACT HEAD FOR THE APPLICATION OF TERMOFUSIBLE TAILS.

Info

Publication number: ES2356758B1
Application number: ES200801391A
Authority: ES
Inventors: Jesus Francisco Barberan Latorre
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-14
Filing date: 2008-05-14
Publication date: 2012-01-25
Anticipated expiration: 2028-05-14
Also published as: EP2119509A2; EP2119509A3; ES2356758A1

Abstract

Cabezal compacto para la aplicación de colas termofusibles, en el cual van integrados un depósito fusor (1) y una cabeza de aplicación (2) conectados directamente entre sí, determinando el depósito fusor (1) unas salidas inferiores (5) que comunican con una cámara (6), la cual se halla comunicada a su vez con la cabeza (2) de aplicación.Compact head for the application of hot melts, in which a fuser tank (1) and an application head (2) are connected directly together, determining the fuser tank (1) lower outlets (5) that communicate with a chamber (6), which is in turn communicated with the application head (2).

Description

termofusibles, según la invención. hot melts, according to the invention.

Cabezal compacto para la aplicación de colas termofusibles. Sector de la técnica Compact head for the application of hot melts. Technical sector

La presente invención esta relacionada con la aplicación de colas termofusibles mediante cabezales a los que la cola a aplicar se suministra desde fusores donde por calentamiento se dota a la cola de la ﬂuidez necesaria para la aplicación, proponiendo un cabezal compacto en el que se reúnen de manera conjunta el elemento fusor y el elemento aplicador de la cola fundida. Estado de la técnica The present invention is related to the application of hot melt glues by means of heads to which the glue to be applied is supplied from melters where, by heating, the glue is provided with the fluidity necessary for the application, proposing a compact head in which they meet jointly the fuser element and the molten glue applicator element. State of the art

En la aplicación de colas termofusibles se utilizan fusores para transformar la cola de un estado sólido, en el que convencionalmente se suministra, a un estado ﬂuido necesario para la aplicación. In the application of hot melts, fusers are used to transform the glue from a solid state, in which it is conventionally supplied, to a fluid state necessary for the application.

Convencionalmente los fusores destinados para transformar las colas termofusibles al estado ﬂuido de aplicación, son unos grandes depósitos que se sitúan a cierta distancia del cabezal mediante el que se realiza la aplicación de la cola. Conventionally, the melters intended to transform the hot melts to the fluid state of application are large deposits that are located at a certain distance from the head by means of which the application of the glue is carried out.

Desde el fusor hasta el cabezal de aplicación, la cola fundida se transporta a través de mangueras calefactadas y recubiertas de aislante, para que la cola fundida llegue al cabezal de aplicación en las condiciones de ﬂuidez necesarias. From the melter to the application head, the molten glue is transported through heated and insulated coated hoses, so that the molten glue reaches the application head under the necessary fluidity conditions.

Estas disposiciones convencionales, necesitan un gran espacio de instalación, debido a la independencia y ubicación por separado de los elementos de fusión y de aplicación de las colas, y además, para que la cola fundida llegue adecuadamente al cabezal de aplicación, se necesitan mangueras de conducción calefactadas, lo cual incrementa el gasto energético. Objeto de la invenciónThese conventional arrangements require a large installation space, due to the independence and separate location of the melting and application elements of the glues, and in addition, for the molten glue to properly reach the application head, hoses are needed. heated driving, which increases energy expenditure. Object of the invention

De acuerdo con la invención se propone un cabezal compacto, en el cual se incluyen incorporados conjuntamente el fusor de la cola y el elemento aplicador, de manera que el paso de la cola fundida entre ambos elementos es directo, sin necesidad de conducción por mangueras calefactadas. According to the invention, a compact head is proposed, in which the tail fuser and the applicator element are included together, so that the passage of the molten tail between both elements is direct, without the need for conduction by heated hoses. .

Este cabezal objeto de la invención, incluye un depósito calefactado para fundir la cola y una cabeza de aplicación, incorporando una bomba de impulsión para pasar la cola fundida del depósito de fusión hasta la cabeza de aplicación. This head object of the invention includes a heated tank to melt the glue and an application head, incorporating a drive pump to pass the molten tail of the melting tank to the application head.

El depósito fusor puede ser de forma variable, abierto o cerrado de manera hermética, en el cual se introduce la cola termofusible en estado sólido, de modo que en el interior, debido al calor que proporcionan unas resistencias eléctricas dispuestas alrededor de dicho deposito, la cola se funde adquiriendo un estado ﬂuido, para ser impulsada hacia la cabeza de aplicación. The melting tank can be of variable form, open or closed in a hermetic way, in which the hot melt glue is introduced in solid state, so that in the interior, due to the heat provided by electrical resistors arranged around said deposit, the tail melts acquiring a fluid state, to be propelled towards the application head.

El depósito fusor se prevé rodeado de una capa aislante, para evitar las pérdidas de calor hacia el exterior, con el ﬁn de conseguir el máximo aprovechamiento del consumo energético que se utiliza para la fusión de las colas. The melting tank is envisaged surrounded by an insulating layer, to avoid heat losses to the outside, in order to achieve maximum use of the energy consumption that is used for the fusion of the tails.

Por todo ello, dicho cabezal compacto objeto de la invención ofrece unas características que resultan ciertamente ventajosas, adquiriendo vida propia y carácter preferente respecto de los cabezales convencionales con elementos separados que se emplean para la aplicación de las colas termofusibles. Descripción de las ﬁgurasTherefore, said compact head object of the invention offers characteristics that are certainly advantageous, acquiring its own life and preferential character with respect to conventional heads with separate elements that are used for the application of hot melts. Description of the ﬁ gures

La ﬁgura 1 es una perspectiva de un ejemplo cons-Figure 1 is a perspective of an example

La ﬁgura 2 es una sección vertical de dicho cabezal compacto objeto de la invención. Figure 2 is a vertical section of said compact head object of the invention.

La ﬁgura 3 es una sección en planta del mismo cabezal compacto anterior. Figure 3 is a plan section of the same front compact head.

La ﬁgura 4 es una perspectiva de otro ejemplo constructivo del cabezal compacto preconizado. Descripción detallada de la invenciónFigure 4 is a perspective of another constructive example of the recommended compact head. Detailed description of the invention

El objeto de la invención se reﬁere a un cabezal compacto para aplicación de colas termofusibles, en el cual se incluyen tanto el elemento destinado para la fusión de la cola, como el elemento de aplicación de la cola fundida. The object of the invention refers to a compact head for application of hot melts, which includes both the element intended for melting the glue and the application element of the molten glue.

El cabezal compacto preconizado consta de un depósito fusor (1), el cual como muestra la ﬁgura 1 puede tener forma cilíndrica, pudiendo también tener otras formas, como por ejemplo una forma prismática, como representa la ﬁgura 4, sin que ello altere el concepto del cabezal aplicador de las colas termofusibles ni su función. Para determinadas colas que reticulan con la humedad del aire, como por ejemplo las colas poliuretánicas, dicho depósito fusor (1) debe establecerse herméticamente cerrado, mientras que para otros tipos de colas que no presentan esta particularidad, no se necesita un cierre hermético. The recommended compact head consists of a fuser tank (1), which as shown in Figure 1 may have a cylindrical shape, and may also have other shapes, such as a prismatic shape, as shown in Figure 4, without altering the concept of the applicator head of the hot melts or their function. For certain glues that cross-link with the humidity of the air, such as polyurethane glues, said fuser tank (1) must be tightly closed, while for other types of glues that do not have this particularity, a tight seal is not necessary.

Dicho depósito fusor (1) va acoplado en conexión directa respecto de una cabeza (2) de aplicación de la cola, que puede ser de tipo de labio o de cualquier otra forma convencional de las boquillas existentes de aplicación de colas, disponiendo el conjunto de una bomba (3), destinada para impulsar la cola fundida desde el depósito fusor (1) hasta la cabeza (2) de aplicación. Said fuser tank (1) is coupled in direct connection with respect to a head (2) for applying the glue, which can be of the lip type or in any other conventional way of the existing nozzles for applying tails, the assembly of a pump (3), designed to drive the molten tail from the fuser tank (1) to the application head (2).

El deposito fusor (1) se dispone rodeado de resistencias eléctricas (no representadas), en una cámara periférica (4) que se establece llena de material aislante, y en la base dicho depósito (1) determina una serie de salidas (5) de paso hasta una cámara (6), la cual a su vez se halla comunicada a través de un conducto (7) con la cabeza (2) de aplicación de las colas, yendo incorporadas en los espacios entre las salidas The fuser tank (1) is arranged surrounded by electrical resistors (not shown), in a peripheral chamber (4) that is established full of insulating material, and at the base said tank (1) determines a series of outputs (5) of passage to a chamber (6), which in turn is communicated through a duct (7) with the head (2) of application of the tails, being incorporated into the spaces between the exits

(5) y alrededor de la cámara (6), resistencias eléctricas (8). (5) and around the chamber (6), electrical resistors (8).

Con ello así, la cola destinada para la aplicación se introduce en estado sólido en el depósito (1), cayendo por gravedad al fondo provisto con las salidas (5), de forma que merced al calor que proporcionan las resistencias que rodean al depósito (1) se produce una fusión inicial de la cola, la cual en las salidas (5) de la base termina de fundir, merced al calor de las resistencias (7) que se hallan en los espacios entre las mencionadas salidas (5), ﬂuyendo la cola fundida hasta la cámara (6), en donde se mantiene el estado de fusión, y desde dicha cámara (6) la cola fundida es impulsada por la bomba (3) hasta la cabeza (2) de aplicación, en el transcurso hasta la cual se hallan incluidas también resistencias eléctricas (8) para mantener la cola en el adecuado estado de ﬂuidez para la aplicación. With this, the glue destined for the application is introduced in solid state in the tank (1), falling by gravity to the bottom provided with the outlets (5), so that thanks to the heat provided by the resistances surrounding the tank ( 1) there is an initial fusion of the tail, which in the outlets (5) of the base finishes melting, thanks to the heat of the resistances (7) that are in the spaces between the mentioned outlets (5), flowing the molten tail to the chamber (6), where the melting state is maintained, and from said chamber (6) the molten tail is driven by the pump (3) to the application head (2), in the course until which also includes electrical resistors (8) to keep the glue in the proper state of fluidity for the application.

En estas condiciones, la cola sólida que se introduce en el depósito (1) se va fundiendo progresivamente en dicho depósito (1), de manera que llega a las salidas inferiores (5) en un estado semifundido, adquiriendo en dichas salidas (5) una ﬂuidez que la permite pasar hasta la cámara (6), de modo que en ese transcurso y en la cámara (6) se completa y mantiene la fusión, impulsándose la cola fundida directamente desde la zona de fusión hacia la cabeza (2) de aplicaUnder these conditions, the solid tail that is introduced into the tank (1) is gradually melted in said tank (1), so that it reaches the lower outlets (5) in a semi-molten state, acquiring in said outlets (5) a fluidity that allows it to pass to the chamber (6), so that in that course and in the chamber (6) the fusion is completed and maintained, the molten tail being propelled directly from the fusion zone towards the head (2) of apply

3 EN 2356758A1 4

ción, de modo que no existen transcursos de circula-de una dimensión que le permite ser utilizado en esción largos en los que la cola pueda enfriarse y perder pacios reducidos. ﬂuidez, en tanto que el conjunto del cabezal resulta tion, so that there are no circulations of a dimension that allows it to be used in long periods in which the tail can cool down and lose small spaces. fluidity, while the head assembly is

5 EN 2356758A1 6

Claims

1. Compact head for the application of hot melts, of the type of which the hot melt glue melts in a melting tank, from which the molten tail is driven towards an application head, characterized in that it comprises a melting tank

(1) which is coupled in direct connection with respect to an application head (2), the fuser tank (1) at its base determining a series of outputs (5) that communicate with a lower chamber (6), which is located communicated in turn, through a duct (7), with the application head (2).

2. Compact head for the application of hot melts, according to the first claim, characterized in that the melting tank (1) is surrounded by electrical resistors housed in a peripheral chamber (4) filled with insulating material, and in turn incorporated between the outputs (5) and around the lower chamber (6) electrical resistors (8), so that the hot melt application glue partially melts in the tank (1), passing through the outputs (5) to the lower chamber ( 6), where the merger is completed.

3. 3.: Cabezal compacto para aplicación de colas termofusibles, de acuerdo con las reivindicaciones primera y segunda, caracterizado porque el depósito fusor (1) se establece con un cierre hermético, para evitar la inﬂuencia del aire exterior sobre la cola que se funde. Compact head for application of hot melt tails, according to the first and second claims, characterized in that the melting tank (1) is established with a hermetic seal, to avoid the in ﬂ uence of the outside air on the melting tail.

4. Four.: Cabezal compacto para aplicación de colas termofusibles, de acuerdo con las reivindicaciones primera y segunda, caracterizado porque en relación con la cámara inferior (6) va dispuesta una bomba (3), mediante la cual se impulsa la cola fundida desde dicha cámara (6) hacia la cabeza (2) de aplicación. Compact head for application of hot melts, according to the first and second claims, characterized in that in relation to the lower chamber (6) a pump (3) is arranged, by means of which the molten tail is driven from said chamber (6) towards the head (2) of application.

SPANISH OFFICE OF THE PATENTS AND BRAND

Application no .: 200801391

SPAIN

Date of submission of the application: 14.05.2008

Priority Date:

REPORT ON THE STATE OF THE TECHNIQUE

51 Int. Cl.: B05C5 / 04 (2006.01) B05C11 / 10 (2006.01)

RELEVANT DOCUMENTS

Categoría Category: Documentos citados Reivindicaciones afectadas Documents cited Claims Affected

X X: DE 3815089 A1 (HESSELMANN PLANATOLWERK H) 09.11.1989, resumen; columna 1, 1,2,4 DE 3815089 A1 (HESSELMANN PLANATOLWERK H) 09.11.1989, summary; column 1, 1,2,4

líneas 3-5; columna 2, líneas 9-49; figura 1. lines 3-5; column 2, lines 9-49; Figure 1.

Y Y: 3 3

Y Y: US 2004200858 A1 (KAPPELER ROMAN et al.) 14.10.2004, párrafo [0038]; figura 2. 3 US 2004200858 A1 (KAPPELER ROMAN et al.) 14.10.2004, paragraph [0038]; figure 2. 3

X X: EP 1894689 A1 (SCM GROUP SPA) 05.03.2008, resumen; párrafos [0028-0047]; figuras 1-3. 1 EP 1894689 A1 (SCM GROUP SPA) 05.03.2008, summary; paragraphs [0028-0047]; Figures 1-3. one

X X: US 4474311 A (PETRECCA PETER J) 02.10.1984, resumen; columna 2, línea 2 – columna 3, 1 US 4474311 A (PETRECCA PETER J) 02.10.1984, summary; column 2, line 2 - column 3, one

línea 5; figuras. line 5; figures.

X X: US 5814790 A (BONDESON BENJAMIN J et al.) 29.09.1998, columna 2, línea 64 – columna 5, 1 US 5814790 A (BONDESON BENJAMIN J et al.) 29.09.1998, column 2, line 64 - column 5, one

línea 13; figuras 1-2. line 13; figures 1-2.

A TO: US 2567960 A (MYERS WILLIAM R et al.) 18.09.1951, columna 2, líneas 18-27. 2 US 2567960 A (MYERS WILLIAM R et al.) 18.09.1951, column 2, lines 18-27. 2

A TO: EP 1260330 A2 (SCM GROUP SPA) 27.11.2002, párrafo [0021]; figura 3. 2 EP 1260330 A2 (SCM GROUP SPA) 27.11.2002, paragraph [0021]; figure 3. 2

Categoría de los documentos citados X: de particular relevancia Y: de particular relevancia combinado con otro/s de la misma categoría A: refleja el estado de la técnica O: referido a divulgación no escrita P: publicado entre la fecha de prioridad y la de presentación de la solicitud E: documento anterior, pero publicado después de la fecha de presentación de la solicitud Category of the documents cited X: of particular relevance Y: of particular relevance combined with other / s of the same category A: reflects the state of the art O: refers to unwritten disclosure P: published between the priority date and the date of priority submission of the application E: previous document, but published after the date of submission of the application

El presente informe ha sido realizado • para todas las reivindicaciones • para las reivindicaciones nº: This report has been prepared • for all claims • for claims no:

Fecha de realización del informe 30.03.2011 Date of realization of the report 30.03.2011: Examinador O. Rucián Castellanos Página 1/4 Examiner O. Rucián Castellanos Page 1/4

REPORT OF THE STATE OF THE TECHNIQUE

Application number: 200801391

Minimum documentation sought (classification system followed by classification symbols) B05C Electronic databases consulted during the search (database name and, if possible, terms of

search used) INVENES, EPODOC

State of the Art Report Page 2/4

WRITTEN OPINION

Application number: 200801391

Date of Written Opinion: 30.03.2011

Statement

Novedad (Art. 6.1 LP 11/1986) Novelty (Art. 6.1 LP 11/1986): Reivindicaciones Reivindicaciones 2-4 1 SI NO Claims Claims 2-4 1 IF NOT

Actividad inventiva (Art. 8.1 LP11/1986) Inventive activity (Art. 8.1 LP11 / 1986): Reivindicaciones Reivindicaciones 1-4 SI NO Claims Claims 1-4 IF NOT

The application is considered to comply with the industrial application requirement. This requirement was evaluated during the formal and technical examination phase of the application (Article 31.2 Law 11/1986).

Opinion Base.-

This opinion has been made on the basis of the patent application as published.

State of the Art Report Page 3/4

WRITTEN OPINION

Application number: 200801391

1. Documents considered.-

The documents belonging to the state of the art taken into consideration for the realization of this opinion are listed below.

Documento Document: Número Publicación o Identificación Fecha Publicación Publication or Identification Number publication date

D01 D01: DE 3815089 A1 (HESSELMANN PLANATOLWERK H) 09.11.1989 DE 3815089 A1 (HESSELMANN PLANATOLWERK H) 09.11.1989

D02 D02: US 2004200858 A1 (KAPPELER ROMAN et al.) 14.10.2004 US 2004200858 A1 (KAPPELER ROMAN et al.) 14.10.2004

2. Statement motivated according to articles 29.6 and 29.7 of the Regulations for the execution of Law 11/1986, of March 20, on Patents on novelty and inventive activity; quotes and explanations in support of this statement

The main object of the invention is a compact head for the application of hot melts. This object is achieved by the characteristics established in the characterizing part of claim 1 comprising a melting tank (1) having at its base outlets (5) that communicate with a lower chamber (6) and through a conduit (7 ) communicates with the application head (2).

The fuser tank (1) is surrounded by electrical resistors located in a peripheral chamber (4) filled with insulating material. There are also electrical resistors (8) between the outputs (5) and around the lower chamber (claim 2). The fuser tank (1) has a tight seal (claim 3). The molten tail is driven from the chamber (6) to the application head (2) with a pump (3).

Document D01 is considered the closest in the state of the art to the object of claims 1, 2 and 4, and discloses (references in parentheses correspond to this document): a device for the fusion of thermoplastic adhesives, consisting of a fusion unit (1), which has a reservoir (2) for fusion. This deposit (2) has in its lower part

(3) a series of outputs that communicate with another lower tank (4) of main fusion. This tank (4) is connected to a conveyor (6) consisting of a motor (7), a coupling (8) and a pump (9). The conveyor (6) is finally connected to an applicator device (11) consisting of a tube (12) and an applicator head (13). The system has several heating resistors (16) distributed by the system, controlled by a control system (15). Specifically, we can find the resistors (16) in the melting tank (2), in the lower melting tank (4), and in the applicator device (11). The system has an insulation system (5) that protects the melting tank (2) and the lower tank (4).

Therefore, the features of claim 1 are already known from document D01. Therefore, claim 1 is not new in view of the state of the known art.

With respect to claim 2, the main difference between the object of the invention and the system disclosed in D01, is that the fuser tank resistors are not around it, but in the lower part. However, placing the resistors in one place or another is considered a normal design option, therefore, obvious to a person skilled in the art. Therefore, claims 2 and 4 have no inventive activity.

The difference between document D01 and the technical object of claim 3 of the application is that the tank (2) does not have a tight seal.

Document D02 discloses a melting system of adhesives or sealants (references in parentheses correspond to this document): which has a cover (11) with a plate (33), under the cover, which has sealing means to hermetically close the cover ( 11) with the container (10).

It is considered that one skilled in the art would attempt to combine the main parts of document D02, with document D01 of the closest prior art to obtain the characteristics of claim 3. Therefore, claim 3 does not imply inventive activity.

State of the Art Report Page 4/4