EP0235055A1 - Thermally fusible adhesive application apparatus with a gas heater - Google Patents

Thermally fusible adhesive application apparatus with a gas heater Download PDF

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Publication number
EP0235055A1
EP0235055A1 EP87420038A EP87420038A EP0235055A1 EP 0235055 A1 EP0235055 A1 EP 0235055A1 EP 87420038 A EP87420038 A EP 87420038A EP 87420038 A EP87420038 A EP 87420038A EP 0235055 A1 EP0235055 A1 EP 0235055A1
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EP
European Patent Office
Prior art keywords
burner
fusion
duct
combustion
nozzle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP87420038A
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German (de)
French (fr)
Inventor
Pascal Girardin
Pierre Sivignon
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Application des Gaz SA
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Application des Gaz SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00546—Details of the heating means
    • B05C17/0055—Burners, e.g. for catalytic combustion specially adapted for hand tools or apparatus using hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00546—Details of the heating means

Definitions

  • the present invention relates to apparatus for applying a hot-melt adhesive, which users commonly refer to as "glue guns”.
  • catalytic burners appear to be well suited for use in portable devices requiring a heat source, on the one hand because of the combustion temperature developed by this type of burner, much lower than that of open flame burners. , including radiant burners, and on the other hand because of their ability to radiate the heat produced, compared to other modes of heat transmission (convection in particular).
  • the glue guns with a gas catalytic burner, proposed by the prior art, do not appear satisfactory in practice, which in particular makes them unsuitable for daily use by professionals or experienced users.
  • the object of the invention is to improve this type of device, to the point of making it a product having a reliable and efficient operation.
  • the box has two adjacent compartments, relatively sealed between them, namely a first compartment located at the rear, in communication with gills for introducing primary or oxidizing air, in which the inlet is arranged. of the burner, and a second compartment containing the majority of the fusion duct and the rest of the burner, in communication with flues for discharging combustion fumes.
  • This technical characteristic makes it possible to separate the path of the incoming air from that of the combustion fumes, and in particular to avoid any mixing of the combustion air with the combustion gases or fumes within the appliance, this is that is to say inside the case.
  • This result is essential when you know that a glue gun is used in all positions, including the nozzle at the bottom; position in which the combustion fumes inevitably rise upwards, therefore towards the combustion air inlet.
  • a combustion smoke deflector is located at the front of the fusion duct and the combustion chamber to put in communication, on one side an open end of said chamber opposite to the inlet of the burner, and the 'other side a annular area around the conduit A fusion adjacent to the dispensing nozzle, a combustion flue gas outlet opening being formed in the baffle at said annular area.
  • the combustion fumes heat the front part of the heating duct, adjacent to the nozzle, but also the latter.
  • This makes it possible in operation to avoid any cooling of the adhesive, increasing its viscosity, between the part of the heating body facing the burner, and the nozzle, and therefore not to hinder the operation of the latter.
  • the front part of the melting pipe and the nozzle are immediately warmed up without waiting for the contribution of calories from the rest of the fusion duct or melted glue.
  • FIG. 1 Illustrated in FIG. 1 is a device for applying a hot-melt adhesive essentially comprising a box (1) provided with a grip handle (2) and a counter-handle (3) allowing the advancement of the sticks of glue in a fusion duct (4) (fig.2) from an introduction orifice (5).
  • the conduit of fusion is part of a monobloc assembly (6) further comprising a gas burner (7) preferably produced in the form of a catalytic burner, and disposed in a combustion chamber (8). Under these conditions, the burner (7) is in heat exchange relationship with the fusion duct (4), the end opposite to the orifice (5) is provided with a distribution nozzle (9) comprising a valve. non-return (10).
  • the box (1) has gills or slots (la) allowing the entry of primary or combustion air in the direction of the injector (7a) of the burner (7) located around an inlet nozzle (11) combustible qaz.
  • the arrows F show the path traveled by the combustion air to enter the box (1) and reach the injector (7a).
  • the one-piece assembly (6) is provided, upstream of the injector (7a) relative to the direction of entry of the combustible gas into the burner (7), with a separating partition produced in the form of a annular screen (12) bringing together, in an almost sealed manner, said monobloc assembly (6) and the internal face of the case (1).
  • this annular screen (12) constitutes in said case two adjacent compartments which are relatively leaktight between them.
  • the first compartment which is located upstream, that is to say at the rear of the housing relative to the nozzle (9), is in communication with the primary or combustion air introduction openings (la). In this compartment is arranged the injector (7a) of the burner. (7).
  • the second compartment containing the majority of the fusion duct and the burner (4), that is to say in fact the major part of the monobloc assembly (6), is in communication with the outside via other gills (1h) produced in the form of slots passing through the wall of the housing (1).
  • the arrows F1 have illustrated the path of the burnt gases from the burner (7) to the outside.
  • the front of the monobloc assembly (6) is provided with a deflector screen (13) produced in the form of a recovery shell comprising a quasi-cylindrical part (13a) surrounding the front of the duct (4 ), the part of which located in the direction of the nozzle (9) has an annular opening (13b) surrounding the duct (4) and remaining free.
  • the deflector (13) also closes the gas outlet orifice outside the combustion chamber (8), located opposite the injector (7a) of the burner (7), so that said burnt gases are forced to lick an annular zone (14) located around the fusion duct (4) in the vicinity of the nozzle (9), in order to heat this zone located in a place where the thermal bond between the burner and said heating channel is considerably reduced .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Coating Apparatus (AREA)
  • Gas Burners (AREA)

Abstract

Son boitier (1) comporte deux compartiments adjacents, relativement étanches entre eux, à savoir un premier compartiment situé à l'arrière, en communication avec des ouies (1a) d'introduction d'air primaire ou comburant, dans lequel est disposée l'entrée (7a) brûleur (7), et un second compartiment contenant la majeure partie du conduit de fusion (4) et le reste du brûleur (7), en communication avec des ouies d'évacuation (1b) des fumées de combustion.Its housing (1) comprises two adjacent compartments, relatively sealed between them, namely a first compartment located at the rear, in communication with openings (1a) for introducing primary or oxidizing air, in which the inlet (7a) burner (7), and a second compartment containing the major part of the fusion duct (4) and the rest of the burner (7), in communication with exhaust flues (1b) of combustion fumes.

Description

La présente invention concerne les appareils d'application d'un adhésif thermofusible, que les utilisateurs désignent couramment sous le nom de "pistolets à colle".The present invention relates to apparatus for applying a hot-melt adhesive, which users commonly refer to as "glue guns".

Depuis de nombreuses années, il est connu, pour différents appareils portatifs à usage domestique ou professionnel, mettant en oeuvre des moyens de chauffage électrique, par exemple une résistance, de substituer à ces derniers un brûleur, un réservoir contenant le combustible étant par ailleurs intégré dans l'appareil. On obtient ainsi des appareils autonomes, c'est-à-dire sans fil d'alimentation à partir d'une source d'énergie électrique.For many years, it has been known, for various portable devices for domestic or professional use, using electrical heating means, for example a resistance, to replace these with a burner, a tank containing the fuel being also integrated. in the device. Autonomous devices, that is to say wireless power supplies, are thus obtained from a source of electrical energy.

Ainsi, selon le document US-A-2 997 869, on a proposé un fer à souder avec brûleur, et plus précisément avec un brûleur catalytique, comprenant

  • - un boitier formant poignée de préhension, contenant un réservoir de méthanol ;
  • - un moyen catalytique de chauffage et de vaporisation du méthanol;
  • - un brûleur catalytique du méthanol vaporisé, comprenant une chambre de combustion au contact d'un catalyseur approprié ;
  • - un corps métallique, formant la panne du fer à souder, disposé au centre et dans l'axe de la chambre de combustion, captant la chaleur de.combustion.
Thus, according to document US-A-2 997 869, a soldering iron with burner has been proposed, and more precisely with a catalytic burner, comprising
  • - a case forming a grip handle, containing a methanol tank;
  • - a catalytic means for heating and vaporizing methanol;
  • - a catalytic burner of vaporized methanol, comprising a combustion chamber in contact with an appropriate catalyst;
  • - a metal body, forming the tip of the soldering iron, placed in the center and in the axis of the combustion chamber, capturing the heat of combustion.

De fait, les brûleurs catalytiques apparaissent bien adaptés à une mise en oeuvre dans des appareils portatifs nécessitant une source calorifique, d'une part en raison de la température de combustion développée par ce type de brûleurs, bien inférieure â célle des brûleurs à flamme nue, y compris des brûleurs radiants, et d'autre part en raison de leur capacité à bien rayonner la chaleur produite, par rapport aux autres modes de transmission de la chaleur (convection en particulier).In fact, catalytic burners appear to be well suited for use in portable devices requiring a heat source, on the one hand because of the combustion temperature developed by this type of burner, much lower than that of open flame burners. , including radiant burners, and on the other hand because of their ability to radiate the heat produced, compared to other modes of heat transmission (convection in particular).

C'est pourquoi les brûleurs catalytiques ont reçu toutes sortes de configurations, y compris tubulaires, pour être utilisés de manière appropriée dans différentes applications comme celles illustrées dans les documents FR-A-1.228 443 et FR-A-1 095 865.This is why the catalytic burners have received all kinds of configurations, including tubular, to be used appropriately in different applications such as those illustrated in documents FR-A-1,228,443 and FR-A-1,095,865.

S'agissant des pistolets à colle, on sait que, dans leur version électrique, ils comportent de manière qéné- rale :

  • -un boitier avec poignée de préhension, présentant à l'arrière un orifice pour l'alimentation des bâtonnets d'adhésif solide ;
  • - une buse pour la distribution de l'adhésif fondu, disposée à l'avant du boitier :
  • - et un. ensemble monobloc métallique rassemblant d'une part un conduit de fusion des bâtonnets, lequel est disposé au moins en partie à l'intérieur du boitier, et communique à une extrémité avec la buse de distribution, et d'autre part un corps de chauffe creux et borgne, situé sous le conduit de fusion parallèlement a lui, et dans lequel est logée une résistance électrique.
With regard to glue guns, we know that, in their electric version, they generally include:
  • -a case with grip handle, having at the rear an orifice for feeding the sticks of solid adhesive;
  • - a nozzle for the distribution of the melted adhesive, placed at the front of the case:
  • - and one. metallic monobloc assembly gathering on the one hand a rod melting duct, which is arranged at least partly inside the case, and communicates at one end with the dispensing nozzle, and on the other hand a hollow heating body and blind, located under the fusion pipe parallel to it, and in which is housed an electrical resistance.

Dans différents documents,'par exemple DE-A-2 118 253, GB-A-2 156 440, on a proposé de substituer un brûleur à la résistance électrique, en particulier un brûleur catalytique, afin de rendre ces pistolets à colle complètement autonomes, à la condition d'intégrer un réservoir de gaz combustible liquéfié dans l'appareil, par exemple dans la poignée. Ainsi, selon les documents DE-A-2 732 365, EP-A-0123 255, un brûleur catalytique est disposé autour du conduit de chauffe.In various documents, for example DE-A-2 118 253, GB-A-2 156 440, it has been proposed to substitute a burner for the electrical resistance, in particular a catalytic burner, in order to make these glue guns completely autonomous , provided that a tank of liquefied combustible gas is integrated into the appliance, for example in the handle. Thus, according to documents DE-A-2 732 365, EP-A-0123 255, a catalytic burner is arranged around the heating duct.

Les .pistolets à colle, avec brûleur catalvtique à gaz, proposés par l'art antérieur, n'apparaissent pas satisfaisants dans la pratique, ce qui en particulier les rend impropres à une utilisation quotidienne par des professionnels ou utilisateurs avertis. Et l'objet de l'invention est d'améliprer ce type d'appareil, au point d'en faire un produit ayant un fonctionnement fiable et performant.The glue guns, with a gas catalytic burner, proposed by the prior art, do not appear satisfactory in practice, which in particular makes them unsuitable for daily use by professionals or experienced users. And the object of the invention is to improve this type of device, to the point of making it a product having a reliable and efficient operation.

Selon l'invention, le boitier comporte deux compartiments adjacents, relativement étanches entre eux, à savoir un premier compartiment situé à l'arrière, en communication avec des ouies d'introduction d'air primaire ou comburant, dans lequel est disposée l'entrée du brûleur, et un second compartiment contenant la majorité du conduit de fusion et le reste du brûleur, en communication avec des ouies d'évacuation des fumées de combustion.According to the invention, the box has two adjacent compartments, relatively sealed between them, namely a first compartment located at the rear, in communication with gills for introducing primary or oxidizing air, in which the inlet is arranged. of the burner, and a second compartment containing the majority of the fusion duct and the rest of the burner, in communication with flues for discharging combustion fumes.

Cette caractéristique technique permet de séparer le trajet de l'air entrant de celui des fumées de combustion, et en particulier d'éviter tout mélanqe de l'air comburant avec les gaz ou fumées de combustion au sein de l'appareil, c'est-à-dire à l'intérieur du boitier. Ce résultat est essentiel, lorsqu'on sait qu'un pistolet à colle est utilisé dans toutes les positions, y compris buse en bas; position dans laquelle les fumées de combustion remontent inévitablement vers le haut, donc vers l'entrée de l'air comburant.This technical characteristic makes it possible to separate the path of the incoming air from that of the combustion fumes, and in particular to avoid any mixing of the combustion air with the combustion gases or fumes within the appliance, this is that is to say inside the case. This result is essential when you know that a glue gun is used in all positions, including the nozzle at the bottom; position in which the combustion fumes inevitably rise upwards, therefore towards the combustion air inlet.

Préférentiellement, un déflecteur des fumées de combustion est situé à l'avant du conduit de fusion et de la chambre de combustion pour mettre en communication, d'un côté une extrémité ouverte de ladite chambre opposée à l'entrée du brûleur, et de l'autre côté une zone annulaire située autour du conduit dA fusion au voisinage, de la buse de distribution, une ouverture de sortie des fumées de combustion étant ménagée dans le déflecteur au niveau de ladite zone annulaire.Preferably, a combustion smoke deflector is located at the front of the fusion duct and the combustion chamber to put in communication, on one side an open end of said chamber opposite to the inlet of the burner, and the 'other side a annular area around the conduit A fusion adjacent to the dispensing nozzle, a combustion flue gas outlet opening being formed in the baffle at said annular area.

De cette manière, les fumées de combustion réchauffent la partie avant du conduit de chauffe, adjacente à la buse, mais aussi cette dernière. Ceci permet en fonctionnement d'éviter tout refroidissement de la colle, augmentant sa viscosité, entre la partie du corps de chauffe en vis-à-vis du brûleur, et la buse, et donc de ne pas entraver le fonctionnement de cette dernière. Par ailleurs, lors du démarrage du pistolet à colle, ou d'une remise en fonctionnement, par exemole sous l'effet d'une 'régulation, la partie avant du conduit de fusion et la buse sont immédiatement réchauffées sans attendre l'apport de calories en provenance du reste du conduit de fusion ou de la collé fondue.In this way, the combustion fumes heat the front part of the heating duct, adjacent to the nozzle, but also the latter. This makes it possible in operation to avoid any cooling of the adhesive, increasing its viscosity, between the part of the heating body facing the burner, and the nozzle, and therefore not to hinder the operation of the latter. Furthermore, when starting the glue gun, or restarting operation, for example under the effect of a regulation, the front part of the melting pipe and the nozzle are immediately warmed up without waiting for the contribution of calories from the rest of the fusion duct or melted glue.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :

  • - la figure 1 est une vue en élévation d'un appareil établi conformément à l'invention
  • - la figure 2 en est une coupe lonqitudinale à plus grande échelle ;.
  • - la figure 3 est une coupe suivant III-III (fiq.2)
The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
  • - Figure 1 is an elevational view of an apparatus established in accordance with the invention
  • - Figure 2 is a longitudinal section on a larger scale;
  • - Figure 3 is a section along III-III (fiq.2)

On a illustré en figure 1 un appareil d'application d'un adhésif thermofusible comprenant essentiellement un boitier (1) pourvu d'une poignée de préhension (2) et d'une contre-poignée (3) permettant l'avancement des bâtonnets de colle dans un conduit de fusion (4) (fig.2) à partir d'un orifice d'introduction (5). Le conduit de fusion fait partie d'un ensemble monobloc (6) comprenant en outre un brûleur à gaz (7) réalisé préférablement sous la forme d'un brûleur catalytique, et disposé dans une chambre de combustion (8). Dans ces conditions, le brûleur (7) est en relation d'échange thermique avec le conduit de fusion (4) dont l'extrémité opposée à l'orifice (5) est pourvue d'une buse de distribution (9) comportant un clapet anti-retour (10).Illustrated in FIG. 1 is a device for applying a hot-melt adhesive essentially comprising a box (1) provided with a grip handle (2) and a counter-handle (3) allowing the advancement of the sticks of glue in a fusion duct (4) (fig.2) from an introduction orifice (5). The conduit of fusion is part of a monobloc assembly (6) further comprising a gas burner (7) preferably produced in the form of a catalytic burner, and disposed in a combustion chamber (8). Under these conditions, the burner (7) is in heat exchange relationship with the fusion duct (4), the end opposite to the orifice (5) is provided with a distribution nozzle (9) comprising a valve. non-return (10).

Le boitier (1) comporte des ouies ou fentes (la) permettant l'entrée de l'air primaire ou comburant en direction de l'injecteur (7a) du brûleur (7) situé autour d'un gicleur (11) d'arrivée du qaz combustible. Les flèches F montrent le trajet parcouru par l'air comburant pour entrer dans le boitier (1) et atteindre l'injecteur (7a).The box (1) has gills or slots (la) allowing the entry of primary or combustion air in the direction of the injector (7a) of the burner (7) located around an inlet nozzle (11) combustible qaz. The arrows F show the path traveled by the combustion air to enter the box (1) and reach the injector (7a).

L'ensemble monobloc (6) est pourvu, lèqement en amont de l'injecteur (7a) par rapport à la direction d'entrée du gaz combustible dans le brûleur (7), d'une cloison séparatrice réaliséé sous la forme d'un écran annulaire (12) réunissant de manière quasiment étanche ledit ensemble monobloc (6) et la face intérieure du boitier (1). Ainsi, cet écran annulaire (12) constitue dans ledit boitier deux compartiments adjacents relativement étanches entre eux. Le premier compartiment qui est situé en amont, c'est-à-dire en arrièré du boitier par rapport à la buse (9), se trouve en communication avec les ouies d'introduction d'air primaire ou comburant (la). Dans ce compartiment est disposé l'injecteur (7a) du brûleur.(7). Le second compartiment contenant la majorité du conduit de fusion et le brûleur (4), c'est-à-dire en fait la majeure partie de l'ensemble monobloc (6), se trouve en communication avec l'extérieur par l'intermédiaire d'autres ouies (1h) réalisées sous la forme de fentes traversant la paroi du boitier (1). On a illustré par les flèches F1 le parcours des gaz brûlés depuis le brûleur (7) jusqu'à l'extérieur.The one-piece assembly (6) is provided, upstream of the injector (7a) relative to the direction of entry of the combustible gas into the burner (7), with a separating partition produced in the form of a annular screen (12) bringing together, in an almost sealed manner, said monobloc assembly (6) and the internal face of the case (1). Thus, this annular screen (12) constitutes in said case two adjacent compartments which are relatively leaktight between them. The first compartment which is located upstream, that is to say at the rear of the housing relative to the nozzle (9), is in communication with the primary or combustion air introduction openings (la). In this compartment is arranged the injector (7a) of the burner. (7). The second compartment containing the majority of the fusion duct and the burner (4), that is to say in fact the major part of the monobloc assembly (6), is in communication with the outside via other gills (1h) produced in the form of slots passing through the wall of the housing (1). The arrows F1 have illustrated the path of the burnt gases from the burner (7) to the outside.

Ainsi, lorsque le brûleur est en fonctionnement et que l'utilisateur du pistolet distribue de la colle, avec le conduit de fusion (4) orienté verticalement, les fumées ou gaz de combustion ne peuvent remonter dans le premier compartiment du boitier, si bien que l'air comburant pur n'est pas vicié par les gaz de combustion. On observe que le montage de l'ensemble monobloc (6) est facilité par la présence de l'écran annulaire (12) qui se trouve retenu entre des nervures (1c),(1d) ménagées transversalement dans le boitier (1).Thus, when the burner is in operation and the user of the gun distributes glue, with the fusion duct (4) oriented vertically, the fumes or combustion gases cannot go up in the first compartment of the box, so that the pure combustion air is not vitiated by the combustion gases. It is observed that the assembly of the monobloc assembly (6) is facilitated by the presence of the annular screen (12) which is retained between ribs (1c), (1d) formed transversely in the housing (1).

On notera que l'avant de l'ensemble monobloc (6) est pourvu d'un écran déflecteur (13) réalisé sous la forme d'une coquille de récupération comportant une partie quasi cylindrique (13a) entourant l'àvant du conduit (4), dont la partie située en direction de la buse (9) comporte une ouverture annulaire (13b) entourant le conduit (4) et restant libre. Le déflecteur (13) obture également l'orifice de sortie des gaz hors de la chambre de combustion (8),situé à l'opposé de l'injecteur (7a) du brûleur (7), si bien que lesdits gaz brûlés sont obligés de lécher une zone annulaire (14) située autour du conduit de fusion (4) au voisinage de la buse (9), afin de réchauffer cette zoné située en un endroit où la liaison thermique entre le brûleur et ledit canal de chauffe est considérablement diminuée.It will be noted that the front of the monobloc assembly (6) is provided with a deflector screen (13) produced in the form of a recovery shell comprising a quasi-cylindrical part (13a) surrounding the front of the duct (4 ), the part of which located in the direction of the nozzle (9) has an annular opening (13b) surrounding the duct (4) and remaining free. The deflector (13) also closes the gas outlet orifice outside the combustion chamber (8), located opposite the injector (7a) of the burner (7), so that said burnt gases are forced to lick an annular zone (14) located around the fusion duct (4) in the vicinity of the nozzle (9), in order to heat this zone located in a place where the thermal bond between the burner and said heating channel is considerably reduced .

Ce réchauffement du débouché du conduit de fusion (4) permet également celui de la buse (9), de telle sorte que le clapet (10) peut fonctionner en toute sécuritéThis heating of the outlet of the melting conduit (4) also allows that of the nozzle (9), so that the valve (10) can operate safely

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.It should moreover be understood that the above description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims (3)

1/ Appareil pour l'application d'un adhésif thermo- fusibie, comprenant : - un boitier (1) avec poignée de préhension (2), présentant à l'arrière un orifice (5) pour l'alimentation de bâtonnets d'adhésif solide ; -et un ensemble monobloc métallique (6) formant: . un conduit de fusion (4) pbur les bâtonnets, disposé au moins en partie à l'intérieur du boitier (1), et communiquant à une extrémité avec la buse (9), un brûleur à gaz (7), allonqé selon la direction du conduit de fusion, en relation d'échange thermique avec ce dernier, tandis qu'une buse de distribution de l'adhésif (9) est disposée à la sortie dudit conduit de fusion (4),
caractérisé en ce que le boitier (1) comporte deux compartiments adjacents, relativement étanches entre eux, à savoir un premier compartiment situé à l'arrière, en communication avec des ouies (la) d'introduction d'air primaire ou comburant, dans lequel est disposée l'entrée (7a) du brûleur (7), et un second compartiment contenant la majeure partie du conduit de fusion (4) et le reste du brûleur (7), en communication avec des ouies d'évacuation (lb) des fumées de combustion.1 / Apparatus for applying a hot-melt adhesive, comprising: - a case (1) with a grip handle (2), having at the rear an orifice (5) for feeding sticks of solid adhesive; -and a metallic monobloc assembly (6) forming: . a fusion duct (4) for the rods, arranged at least partially inside the casing (1), and communicating at one end with the nozzle (9), a gas burner (7), stretched in the direction of the fusion duct, in heat exchange relationship with the latter, while an adhesive distribution nozzle (9) is disposed at the outlet of said fusion duct (4),
characterized in that the housing (1) comprises two adjacent compartments, relatively sealed with each other, namely a first compartment located at the rear, in communication with openings (la) for introducing primary or oxidizing air, in which is arranged the inlet (7a) of the burner (7), and a second compartment containing the bulk of the fusion conduit (4) and the rest of the burner (7) in communication with louvers outlet (lb) of combustion fumes. 2/ Appareil selon la revendication 1, caractérisé en ce que les deux compartiments sont constitués au moyen d'une cloison séparatrice (12) réalisée sous la forme d'un écran annulaire se dressant perpendiculairement à l'ensemble monobloc métallique (6) et dont la périphérie affecte la forme intérieure du boitier, ladite cloison se situant au niveau de l'entrée (7a) de l'air comburant dans le brûleur catalytique (7) ou en aval de celui-ci.2 / Apparatus according to claim 1, characterized in that the two compartments are constituted by means of a separating partition (12) produced in the form of an annular screen standing perpendicular to the metal monobloc assembly (6) and of which the periphery affects the internal shape of the housing, said partition being located at the air inlet (7a) oxidizer in the catalytic burner (7) or downstream of it. 3/ Appareil suivant la revendication 1, caractérisé en ce qu'un déflecteur (13) des fumées de combustion situé à l'avant du conduit de fusion (4) et de la chambre de combustion (8) met en communication, d'un côté une extrémité ouverte de ladite chambre, opposée à l'entrée du brûleur (7), et de l'autre côté une zone annulaire (14) située autour du conduit de fusion (4), au voisinage de la buse de distribution (9), au moins une ouverture de sortie (1b) des fumées de combustion étant ménagée dans le déflecteur au niveau de ladite zone annulaire.3 / Apparatus according to claim 1, characterized in that a deflector (13) of combustion fumes located at the front of the melting pipe (4) and the combustion chamber (8) connects, of a side an open end of said chamber, opposite the inlet of the burner (7), and on the other side an annular zone (14) located around the melting pipe (4), in the vicinity of the dispensing nozzle (9 ), at least one outlet opening (1b) of the combustion fumes being formed in the deflector at the level of said annular zone.
EP87420038A 1986-02-17 1987-02-10 Thermally fusible adhesive application apparatus with a gas heater Withdrawn EP0235055A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8602285A FR2594358B1 (en) 1986-02-17 1986-02-17 GAS BURNER APPARATUS FOR APPLYING A THERMO-FUSE ADHESIVE
FR8602285 1986-02-17

Publications (1)

Publication Number Publication Date
EP0235055A1 true EP0235055A1 (en) 1987-09-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420038A Withdrawn EP0235055A1 (en) 1986-02-17 1987-02-10 Thermally fusible adhesive application apparatus with a gas heater

Country Status (4)

Country Link
US (1) US4755073A (en)
EP (1) EP0235055A1 (en)
JP (1) JPS62201673A (en)
FR (1) FR2594358B1 (en)

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FR2612087A1 (en) * 1987-03-12 1988-09-16 Ryobi Ltd CATALYTIC COMBUSTION TYPE ADHESIVE GUN
WO2001007173A1 (en) * 1999-07-26 2001-02-01 Oglesby & Butler Research & Development Limited A heating device

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US7367474B2 (en) * 2005-01-03 2008-05-06 Arlo Lin Gas-powered glue gun
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US20080047543A1 (en) * 2006-08-22 2008-02-28 Arlo Lin Gas-powered tool
TW201040468A (en) * 2009-05-04 2010-11-16 Pro Iroda Ind Inc A device for increasing ignition speed of gas tool and a gas tool utilizing the same
DE102012102841B3 (en) * 2012-04-02 2013-07-11 Institut Für Verbundwerkstoffe Gmbh Preparing a roving useful for producing a preform of a component from a fiber reinforced plastic, comprises e.g. burning a fuel gas or oxygen mixture in a fuel gas nozzle and applying the heated binder material on and in the roving
CN107344162A (en) * 2017-07-25 2017-11-14 宁波福马工具有限公司 A kind of combustion gas colloidal sol rifle
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EP0123259A1 (en) * 1983-04-22 1984-10-31 Beecham Group Plc Adhesive dispenser
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612087A1 (en) * 1987-03-12 1988-09-16 Ryobi Ltd CATALYTIC COMBUSTION TYPE ADHESIVE GUN
WO2001007173A1 (en) * 1999-07-26 2001-02-01 Oglesby & Butler Research & Development Limited A heating device
US7543580B1 (en) 1999-07-26 2009-06-09 Oglesby & Butler Research & Development Limited Heating device

Also Published As

Publication number Publication date
JPS62201673A (en) 1987-09-05
FR2594358A1 (en) 1987-08-21
FR2594358B1 (en) 1988-09-09
US4755073A (en) 1988-07-05

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