FR2462198A1 - Ball valve for adhesive dispensing gun - has recess wider than seating ring, leaving clearance permitting travel of ring to prevent clogging - Google Patents
Ball valve for adhesive dispensing gun - has recess wider than seating ring, leaving clearance permitting travel of ring to prevent clogging Download PDFInfo
- Publication number
- FR2462198A1 FR2462198A1 FR7919175A FR7919175A FR2462198A1 FR 2462198 A1 FR2462198 A1 FR 2462198A1 FR 7919175 A FR7919175 A FR 7919175A FR 7919175 A FR7919175 A FR 7919175A FR 2462198 A1 FR2462198 A1 FR 2462198A1
- Authority
- FR
- France
- Prior art keywords
- valve
- ring
- seal
- ball
- 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.)
- Withdrawn
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Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Coating Apparatus (AREA)
- Nozzles (AREA)
- Closures For Containers (AREA)
Abstract
Description
La présente invention se rapporte à la distribution de produits liquides et, notamment,à l'application de produits lique- fiés sous l'action de la chaleur tels que des colles thermoplastiques, des cires, mastics, etc. The present invention relates to the distribution of liquid products and, in particular, to the application of products liquefied under the action of heat such as thermoplastic adhesives, waxes, mastics, etc.
Pour distribuer ou appliquer de tels produits, on utilise souvent des appareils appelés "applicateurs" qui se terminent par une buse contenant une soupape de retenue, généralement constitude par un clapet en forme de bille ou de ctne qutun ressort repousse sur son siège. To distribute or apply such products, devices are often used called "applicators" which end in a nozzle containing a check valve, generally constancy by a ball-shaped valve or ctne that a spring pushes back on its seat.
De telles buses présentent l'inconvénient de laisser souvent echapper des gouttes de liquide après utilisation de l'appareil, notamment lorsque la soupape n'est pas étanche. Dans le cas de liquides fondus, il peut en résulter de graves brtlures
En outre, il est très difficile, parfois impossible, de faire des applications à dosage précis et, dans ce cas, l'applicateur perd beaucoup de son effieaoité. Such nozzles have the drawback of often allowing drops of liquid to escape after using the device, especially when the valve is not sealed. In the case of molten liquids, serious burns may result.
In addition, it is very difficult, sometimes impossible, to make precise dosage applications and, in this case, the applicator loses much of its effectiveness.
la présente invention a pour but essentiel de créer une buse de distribution qui soit exempte de tels inconvénients. the main object of the present invention is to create a dispensing nozzle which is free from such drawbacks.
A cet effet, selon l'invention, un joint annulaire, de préférence souple, est interposé entre le clapet et le siège, de telle sorte qu'il dispose dtune latitude de déplacement inférieure à celle du clapet. la présence de ce joint assure une bonne étanchéité de la soupape. To this end, according to the invention, an annular seal, preferably flexible, is interposed between the valve and the seat, so that it has a lower latitude of movement than that of the valve. the presence of this seal ensures a good seal of the valve.
De préférence, le joint annulaire est logé dans une chambre de dimensions transversales supérieures à celles du clapet et dans laquelle il peut se déplacer sans jeu extérieur appréciable. Grâce à cette disposition, l'ouverture de la soupape ne steffectue que lorsque le joint a parcouru la chambre et la fermeture de la soupape s'accompagne d'un effet de piston dA à l'ensem- ble du clapet et du joint, qui aspire le liquide restant dans la buse, empêchant tout écoulement intempestif et assurant donc un dosage précis. Preferably, the annular seal is housed in a chamber of transverse dimensions greater than those of the valve and in which it can move without appreciable outside play. Thanks to this arrangement, the opening of the valve takes place only when the seal has passed through the chamber and the closing of the valve is accompanied by a piston effect dA throughout the valve and the seal, which sucks the liquid remaining in the nozzle, preventing any untimely flow and thus ensuring precise dosing.
l'invention peut s'appliquer à tout dispositif distributeur de produits liquides ou semi-liquides. Blle trouve une application particulièrement intéressante aux applicateurs de produits fondus quels que soient leur mode de commande (manuelle , pneumatique ou électrique) et leur mode d'alimentation (batonnets, poudres, granulés, etc..). the invention can be applied to any device for dispensing liquid or semi-liquid products. Blle finds a particularly interesting application for applicators of molten products whatever their mode of control (manual, pneumatic or electric) and their mode of supply (sticks, powders, granules, etc.).
b description qui va suivre, en regard du dessin annexé donné à titre d'exemple non limitatif, fera bien comprendre comment l'invention peut être réalisée, les particularités qui ressortent, tant du dessin que du texte, faisant, bien entendu, partie de ladite invention. b description which will follow, with reference to the appended drawing given by way of nonlimiting example, will make it clear how the invention can be implemented, the features which emerge, both from the drawing and from the text, of course forming part of said invention.
la figure 1 est une vue schématique en coupe longitudinale deun applicateur que lton peut perfectionner selon l'invention. Figure 1 is a schematic view in longitudinal section of an applicator which can be improved according to the invention.
les figures 2 et 3 sont des coupes axiales dtune buse réaliste selon l'invention. la soupape est fermée sur la figure 2 et ouverte sur la figure 3*
La figure t représente très shématiquement un exemple d'appareil connu auquel l'invention peut s'appliquer. Il s'agit d'un applicateur 1, en forme de pistolet, pour un produit fusible introduit dans l'appareil sous la forme de bâtonnets 2. Figures 2 and 3 are axial sections of a realistic nozzle according to the invention. the valve is closed in Figure 2 and open in Figure 3 *
FIG. T very schematically represents an example of a known device to which the invention can be applied. It is an applicator 1, in the form of a gun, for a fusible product introduced into the device in the form of sticks 2.
l'applicateur 1 comporte un élément chauffant tubulaire 3 raccordé à une extrémité à un manchon isolant 4 dans lequel peint coulisser le bttonnet 2 et, à l'autre extrémité, à une buse de distribution 5 pour le produit fondu 6. the applicator 1 comprises a tubular heating element 3 connected at one end to an insulating sleeve 4 in which the sliding rod 2 is painted and, at the other end, to a dispensing nozzle 5 for the molten product 6.
Cette buse 5 présente, à son extrémité d'entrée, un siège 7 sur lequel un ressort 8 repousse un clapet constitue ici par une bille 9. This nozzle 5 has, at its inlet end, a seat 7 on which a spring 8 pushes a valve here constitutes a ball 9.
;'inconvénient d'un tel appareil réside en ce que, souvent, le produit liquide suinte goutte à goutte par la buse 5, notamment du fait qutil est difficile d'obtenir une étanchéité correcte entre le siège et la bille0
la buse conforme à l'invention et que représentent les figures 2 et 3 permet de remédier à cet inconvénient.; 'disadvantage of such a device is that, often, the liquid product oozes drop by drop through the nozzle 5, in particular because it is difficult to obtain a correct seal between the seat and the ball 0
the nozzle according to the invention and shown in Figures 2 and 3 overcomes this drawback.
Dans ladite buse, l'alésage 10, qui contient le ressort 8 et la bille 9 est raccordé, vers l'extrémité d1 entrée du liquide, avec une chambre Il de plus grand diamètre qui communique ellemême avec l'extérieur par un orifice plus petit 12. In said nozzle, the bore 10, which contains the spring 8 and the ball 9 is connected, towards the end of the inlet for the liquid, with a chamber II of larger diameter which itself communicates with the outside through a smaller orifice. 12.
la chambre Il contient un joint annulaire 13, dont le diamètre extérieur est égal à celui de ladite chambre, tandis que le diamètre intérieur est inférieur à ceux de la bille 9, de l'alésage 10 et de l'orifice 12, le bord interne 14 dudit orifice jouant donc le rtle de siège pour le joint 13. En outre, l'épaisseur du joint 13 est inférieure à la longueur de la chambre 11 de façon à ménager un espace 15 qui permet le déplacement longitudinal du joint dans la chambre. the chamber It contains an annular seal 13, the outside diameter of which is equal to that of the said chamber, while the inside diameter is less than that of the ball 9, the bore 10 and the orifice 12, the internal edge 14 of said orifice therefore playing the seat rtle for the seal 13. In addition, the thickness of the seal 13 is less than the length of the chamber 11 so as to provide a space 15 which allows the longitudinal displacement of the seal in the chamber.
le joint 13 peut être réalisé par exemple en élastomère ou produit fluoré. il est de préférence souple. il peut être torique mais aussi de section non circulaire, par exemple carrée ou rectangulaire, trapézold le, polygonale, méplate, etc. the seal 13 can be made for example of elastomer or fluorinated product. it is preferably flexible. it can be toroidal but also of non-circular cross-section, for example square or rectangular, trapezoid, polygonal, flat, etc.
Le dispositif que l'on vient de décrire fonctionne comme suit :
Au repos, le clapet 9, rappelé par le ressort 8, repousse le joint annulaire 13 contre le siège 14, l'étanchéité étant as sur rée, de façon satisfaisante, d'une part en 16 entre la siège et le joint et, d'autre part, en 17 entre le joint et le clapet.The device that has just been described operates as follows:
At rest, the valve 9, returned by the spring 8, pushes the annular seal 13 against the seat 14, the seal being satisfactory, on the one hand at 16 between the seat and the seal and, d on the other hand, in 17 between the seal and the valve.
Lorsque la pression du liquide croit et atteint une valeur suffisante pour vaincre la force du ressort 8, l'ensemble du clapet et du joint se déplace d'abord en bloc jusqu'à ce que le joint 13 soit arrêts par la face antérieure 18 de la chambre 11 puis le clapet se déplace seul, livrant passage au liquide vers l'ajutage de sortie 19 de la buse. le dispositif occupe alors l'état représenté sur la figure 3. When the pressure of the liquid increases and reaches a value sufficient to overcome the force of the spring 8, the assembly of the valve and of the seal moves first in block until the seal 13 is stopped by the front face 18 of the chamber 11 then the valve moves alone, delivering passage to the liquid towards the outlet nozzle 19 of the nozzle. the device then occupies the state shown in FIG. 3.
Quand la pression du liquide baisse, dans un premier tempo le clapet 9, en reculant, vient s'appliquer sur le joint 13, fermant le passage au liquide puis, dans un second temps, il continue de reculer en entrainant le joint jusqutà ce que ce dernier vienne s1 appliquer sur son siège 14. Durant ce second temps, l'ensemble du clapet et du joint fait office de piston dans la chambre Il et exerce une succion dans l'alésage 10, ce qui rappelle vers l'arrière tout liquide qui aurait tendance à déborder par l'ajutage 19. When the pressure of the liquid drops, in a first tempo the valve 9, while moving back, is applied to the joint 13, closing the passage to the liquid then, in a second time, it continues to move back by driving the joint until the latter comes s1 to apply on its seat 14. During this second time, the assembly of the valve and the seal acts as a piston in the chamber II and exerts a suction in the bore 10, which reminds the rear any liquid which would tend to overflow through the nozzle 19.
On obtient ainsi un dosage précis du liquide aveo étanchéité parfaite de la buse 5. This gives a precise dosage of the liquid with perfect sealing of the nozzle 5.
Il va de soi que le mode de réalisation n'est qutun exemple et l'on pourrait le modifier, notamment par substitution d'équivalents techniques, sans sortir pour cela du cadre de l'in- vention. It goes without saying that the embodiment is only one example and it could be modified, in particular by substitution of technical equivalents, without departing from the scope of the invention.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7919175A FR2462198A1 (en) | 1979-07-25 | 1979-07-25 | Ball valve for adhesive dispensing gun - has recess wider than seating ring, leaving clearance permitting travel of ring to prevent clogging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7919175A FR2462198A1 (en) | 1979-07-25 | 1979-07-25 | Ball valve for adhesive dispensing gun - has recess wider than seating ring, leaving clearance permitting travel of ring to prevent clogging |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2462198A1 true FR2462198A1 (en) | 1981-02-13 |
Family
ID=9228281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7919175A Withdrawn FR2462198A1 (en) | 1979-07-25 | 1979-07-25 | Ball valve for adhesive dispensing gun - has recess wider than seating ring, leaving clearance permitting travel of ring to prevent clogging |
Country Status (1)
Country | Link |
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FR (1) | FR2462198A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0055350A2 (en) * | 1980-12-29 | 1982-07-07 | Steinel GmbH & Co. KG | Device for fluidifying a fusible glue |
-
1979
- 1979-07-25 FR FR7919175A patent/FR2462198A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0055350A2 (en) * | 1980-12-29 | 1982-07-07 | Steinel GmbH & Co. KG | Device for fluidifying a fusible glue |
EP0055350A3 (en) * | 1980-12-29 | 1982-09-08 | Steinel GmbH & Co. KG | Device for fluidifying a fusible glue |
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ST | Notification of lapse |