FR2863512A1 - Spray gun for product e.g. paint, has bellow whose end directed towards product chamber includes joint to ensure tightness of needle that has scrap wall for joint, where needle is moved to and fro - Google Patents
Spray gun for product e.g. paint, has bellow whose end directed towards product chamber includes joint to ensure tightness of needle that has scrap wall for joint, where needle is moved to and fro Download PDFInfo
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- FR2863512A1 FR2863512A1 FR0314471A FR0314471A FR2863512A1 FR 2863512 A1 FR2863512 A1 FR 2863512A1 FR 0314471 A FR0314471 A FR 0314471A FR 0314471 A FR0314471 A FR 0314471A FR 2863512 A1 FR2863512 A1 FR 2863512A1
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- Prior art keywords
- needle
- product
- chamber
- gas
- nozzle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
- B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
- B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
- B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Nozzles (AREA)
Abstract
Description
La présente invention concerne un pistolet automatique pour laThe present invention relates to an automatic pistol for
pulvérisation d'un produit tel qu'une peinture, une laque, un émail, etc.. . spraying a product such as a paint, a lacquer, an enamel, etc.
On sait qu'un tel pistolet automatique comporte un corps, généralement en deux parties, dans lequel sont pratiquées une chambre de gaz et une chambre de produit, respectivement alimentées depuis l'extérieur en gaz propulseur sous pression (généralement de l'air comprimé) et en produit à pulvériser sous pression. La partie avant dudit pistolet comprend une buse de pulvérisation dudit produit, reliée à la chambre de produit, et un chapeau de soufflage de gaz, relié à la chambre de gaz par des conduits internes et apte à propulser et pulvériser le produit sous pression sortant de la buse. De plus, à l'intérieur du pistolet est prévue une aiguille traversant les chambres de gaz et de produit et pourvue à son extrémité avant d'un pointeau apte à obturer ladite buse. A son extrémité arrière, ladite aiguille est solidaire de moyens d'actionnement, généralement un vérin pneumatique, aptes à la déplacer en translation parallèlement à elle-même. Ainsi, ledit pointeau peut obturer ou dégager ladite buse. It is known that such an automatic pistol comprises a body, generally in two parts, in which are formed a gas chamber and a product chamber, respectively supplied from the outside with propellant gas under pressure (generally compressed air). and pressurized spray product. The front part of said gun comprises a spray nozzle of said product, connected to the product chamber, and a gas blowing cap, connected to the gas chamber by internal ducts and able to propel and spray the product under pressure coming out of the nozzle. In addition, inside the gun is provided a needle passing through the gas chambers and product and provided at its front end with a needle able to close said nozzle. At its rear end, said needle is secured to actuating means, generally a pneumatic cylinder, able to move in translation parallel to itself. Thus, said needle can close off or disengage said nozzle.
Pour éviter que, le long de l'aiguille, du gaz propulseur passe de la chambre de gaz à la chambre de produit et, inversement, que du produit à pulvériser passe de la chambre de produit à la chambre de gaz, on prévoit une première et une seconde étoupes, traversées par ladite aiguille et respectivement disposées du côté de la chambre de gaz et du côté de la chambre de produit. To prevent the propellant passing along the needle from the gas chamber to the product chamber and, conversely, that the product to be sprayed passes from the product chamber to the gas chamber, a first and a second tow, traversed by said needle and respectively disposed on the side of the gas chamber and the side of the product chamber.
Bien entendu, dans un tel pistolet automatique connu, ladite aiguille coulisse dans lesdites étoupes à chaque fois qu'il est nécessaire d'ouvrir et de fermer la buse. Of course, in such a known automatic gun, said needle slides in said tows each time it is necessary to open and close the nozzle.
On remarquera que, du côté de la seconde étoupe, la surface de l'aiguille est recouverte du produit à pulvériser, qui est souvent abrasif et/ou corrosif, comme cela est par exemple le cas pour l'émail, de sorte qu'à chaque coulissement dans un sens ou dans l'autre de l'aiguille, cette dernière et ladite seconde étoupe sont soumises à un processus d'érosion. L'aiguille et la seconde étoupe s'usent donc rapidement, ce qui nécessite leur remplacement fréquent et implique l'arrêt du fonctionnement du pistolet automatique. Si, en général, le remplacement de l'aiguille est relativement aisé, en revanche le remplacement de ladite seconde étoupe est une opération lourde imposant le démontage et le remontage du pistolet automatique. It will be noted that, on the side of the second tow, the surface of the needle is covered with the product to be sprayed, which is often abrasive and / or corrosive, as is the case, for example, with enamel, so that each sliding in one direction or the other of the needle, the latter and said second tow are subjected to an erosion process. The needle and the second tow are therefore worn out quickly, which requires their frequent replacement and involves stopping the operation of the automatic pistol. If, in general, the replacement of the needle is relatively easy, however the replacement of said second tow is a heavy operation requiring disassembly and reassembly of the automatic gun.
L'objet de la présente invention est de remédier à cet inconvénient en permettant de réduire l'usure mutuelle de l'aiguille et de la seconde étoupe par les mouvements de va-et-vient de l'aiguille enduite de produit à pulvériser. The object of the present invention is to overcome this disadvantage by making it possible to reduce the mutual wear of the needle and the second tow by the back and forth movements of the needle coated with the product to be sprayed.
A cette fin, selon l'invention, le pistolet automatique pour la pulvérisation d'un produit tel qu'une peinture, une laque, un émail ou un produit analogue, comportant: une chambre de gaz, apte à être alimentée en gaz propulseur sous pres- sion; une chambre de produit, apte à être alimentée en produit à pulvériser sous pression; une buse de pulvérisation de produit, reliée à ladite chambre de pro-duit; un chapeau de soufflage de gaz, relié à ladite chambre de gaz et apte à propulser et à pulvériser le produit sous pression sortant de ladite buse; une aiguille traversant ladite chambre de gaz et ladite chambre de pro-duit et pourvue d'un pointeau apte à obturer ladite buse; - des moyens d'actionnement de ladite aiguille pour la déplacer en translation parallèlement à elle-même, afin d'ouvrir ou de fermer ladite buse au moyen dudit pointeau; des premiers moyens d'étanchéité traversés par ladite aiguille et assu- 5 rant l'étanchéité au gaz de ladite chambre de gaz vers ladite chambre de produit; et des seconds moyens d'étanchéité traversés par ladite aiguille et assurant l'étanchéité au produit de ladite chambre de produit vers ladite chambre de gaz, est remarquable: en ce que lesdits seconds moyens d'étanchéité comportent un soufflet souple, dont l'extrémité dirigée vers ladite chambre de gaz est fixe en position et dont l'autre extrémité dirigée vers ladite chambre de produit est pourvue d'au moins un joint assurant l'étanchéité autour de ladite aiguille; et en ce que la partie de ladite aiguille interne audit soufflet est pourvue d'une butée pour ledit joint. For this purpose, according to the invention, the automatic spray gun for the spraying of a product such as a paint, a lacquer, an enamel or a similar product, comprising: a gas chamber, able to be supplied with propellant gas under pressure; a product chamber, capable of being fed with pressurized sprays; a product spray nozzle connected to said product chamber; a gas blowing cap, connected to said gas chamber and adapted to propel and spray the pressurized product exiting said nozzle; a needle passing through said gas chamber and said pro-duct chamber and provided with a needle able to close said nozzle; means for actuating said needle to move it in translation parallel to itself, in order to open or close said nozzle by means of said needle; first sealing means traversed by said needle and sealing the gas from said gas chamber to said product chamber; and second sealing means traversed by said needle and sealing the product of said product chamber to said gas chamber, is remarkable: in that said second sealing means comprise a flexible bellows, whose end directed towards said gas chamber is fixed in position and whose other end directed towards said product chamber is provided with at least one seal ensuring sealing around said needle; and in that the portion of said inner needle to said bellows is provided with a stop for said seal.
Ainsi, grâce à la présente invention, la liaison entre lesdits seconds moyens d'étanchéité et ladite aiguille n'est pas rigide, mais au contraire présente un certain degré de liberté en coulissement apte à réduire l'usure de l'aiguille et de ces seconds moyens d'étanchéité : dans son mouvement vers la buse, l'aiguille peut entraîner l'extension longitudinale du soufflet par poussée de la butée sur ledit joint, alors que, lorsque l'aiguille s'éloigne de la buse, le produit à pulvériser peut contracter longitudinale- ment le soufflet sur lui-même en pressant ledit joint contre ladite butée. Thus, thanks to the present invention, the connection between said second sealing means and said needle is not rigid, but on the contrary has a certain degree of freedom in sliding capable of reducing the wear of the needle and these second sealing means: in its movement towards the nozzle, the needle can cause the longitudinal extension of the bellows by pushing the stop on said seal, whereas, when the needle moves away from the nozzle, the product to Spraying can contract longitudinally the bellows on itself by pressing said seal against said stop.
Dans le cas fréquent où ledit pistolet automatique comporte une première et une seconde parties assemblées, ladite première partie comportant la chambre de gaz, les moyens d'actionnement de l'aiguille et les premiers moyens d'étanchéité, alors que ladite seconde partie comporte la chambre de produit, la buse de pulvérisation, le chapeau de soufflage et lesdits seconds moyens d'étanchéité, il est avantageux que l'extrémité fixe dudit soufflet soit pressée entre lesdites première et seconde parties dudit pistolet automatique. In the frequent case where said automatic pistol comprises first and second assembled parts, said first part comprising the gas chamber, the actuating means of the needle and the first sealing means, whereas said second part comprises the product chamber, the spray nozzle, the blow cap and said second sealing means, it is advantageous for the fixed end of said bellows to be pressed between said first and second portions of said automatic gun.
Afin de favoriser le fonctionnement du soufflet en évacuant l'air qu'il contient lors d'une contraction et en aspirant de l'air lors d'une extension, on prévoit avantageusement un conduit d'évent reliant l'intérieur du soufflet à l'extérieur dudit pistolet. On remarquera qu'un tel conduit d'évent permet de plus d'évacuer vers l'extérieur le produit à pulvériser lors d'un percement ou d'une rupture du soufflet, ce qui constitue un moyen de signaler à l'utilisateur du pistolet automatique la défaillance du-dit soufflet. In order to promote the operation of the bellows by evacuating the air that it contains during a contraction and by sucking air during an extension, a vent duct connecting the inside of the bellows to the ventilator is advantageously provided. outside said gun. It will be noted that such a vent duct also makes it possible to evacuate the product to be sprayed during a piercing or rupture of the bellows, which constitutes a means of signaling the user of the spray gun. automatic failure of said bellows.
Le joint dont est pourvu le soufflet peut comporter un bourrelet d'étanchéité et un anneau racleur, disposé devant ledit bourrelet en direc- tion de ladite buse. The gasket provided with the bellows may comprise a sealing bead and a scraper ring disposed in front of said bead in the direction of said nozzle.
La butée prévue sur ladite aiguille peut être formée par un épaule-ment de celle-ci. The abutment provided on said needle may be formed by a shoulder-ment thereof.
Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables. The figures of the appended drawing will make it clear how the invention can be realized. In these figures, identical references designate similar elements.
La figure 1 est une vue en coupe longitudinale schématique d'un exemple de réalisation de pistolet automatique conforme à la présente invention. Figure 1 is a schematic longitudinal sectional view of an exemplary embodiment of automatic pistol according to the present invention.
Les figures 2 à 4 sont des vues partielles agrandies de la tête de pulvérisation du pistolet automatique de la figure 1, ces figures 2, 3 et 4 illustrant le soufflet d'étanchéité conforme à la présente invention respectivement en cas de fermeture de la buse de pulvérisation, d'ouverture de ladite buse sans injection de produit à pulvériser et d'ouverture de la buse avec injection dudit produit. FIGS. 2 to 4 are partial enlarged views of the spray head of the automatic pistol of FIG. 1, these FIGS. 2, 3 and 4 illustrating the sealing bellows according to the present invention respectively in the case of closure of the nozzle of FIG. spraying, opening said nozzle without injecting product to spray and opening the nozzle with injection of said product.
Le pistolet automatique de pulvérisation représenté schématique-ment en coupe sur la figure 1 comporte une partie arrière I et une partie avant II, assemblées l'une à l'autre le long d'un plan de joint P au moyen de vis ou analogues (non représentées). The automatic spray gun shown diagrammatically in section in FIG. 1 comprises a rear part I and a front part II, assembled to one another along a joint plane P by means of screws or the like ( not represented).
La partie avant II, qui correspond essentiellement à la tête de pulvérisation du pistolet automatique, est par exemple des types décrits dans les documents FR-2 788 231 et FR-2 839 663. Elle comporte un corps 1, une buse de pulvérisation 2, une bague de répartition de gaz 3, un chapeau de soufflage de gaz 4 et une bague de retenue 5. The front part II, which essentially corresponds to the spray head of the automatic pistol, is for example of the types described in documents FR-2 788 231 and FR-2 839 663. It comprises a body 1, a spray nozzle 2, a gas distribution ring 3, a gas blowing cap 4 and a retaining ring 5.
Dans le corps 1 de cette tête de pulvérisation (voir également les figures 2 à 4), sont ménagés une chambre de produit 6, un conduit 7 pour l'alimentation de la chambre 6 en produit à pulvériser et un conduit 8 pour le recyclage d'un éventuel excédent de produit apporté à la chambre 6. Le corps 1 comporte de plus des canaux 9 et 10 respectivement alimentés en air comprimé, comme cela sera mentionné ci-après, et destinés à alimenter respectivement des orifices 11 et 12 de pulvérisation de produit et des orifices 1 3, 14 de façonnage du jet de produit pulvérisé, lesdits orifices 1 1 à 14 étant pratiqués dans le chapeau de soufflage de gaz 4. In the body 1 of this spray head (see also FIGS. 2 to 4) are provided a product chamber 6, a conduit 7 for supplying the chamber 6 with a product to be sprayed, and a conduit 8 for recycling the product. Any excess product supplied to the chamber 6. The body 1 further comprises channels 9 and 10 respectively supplied with compressed air, as will be mentioned hereinafter, and intended respectively to supply the orifices 11 and 12 for spraying. product and orifices 1 3, 14 for shaping the jet of sprayed product, said orifices 1 1 to 14 being formed in the gas blowing cap 4.
La partie arrière I comporte un corps 15 dans lequel sont ménagés une chambre de gaz 16, un conduit 17 pour l'alimentation de la chambre 16 en gaz de pulvérisation (air comprimé), une chambre de vérin 18 et un conduit 19 pour l'alimentation de ladite chambre 18 en air comprimé. The rear part I comprises a body 15 in which are formed a gas chamber 16, a conduit 17 for supplying the chamber 16 with sputtering gas (compressed air), a cylinder chamber 18 and a conduit 19 for the supplying said chamber 18 with compressed air.
La chambre de gaz 16 est reliée aux canaux 9 et 10 par des canaux 20 (dont un seul est représenté). Un dispositif 21, interposé entre la chambre de gaz 16 et les canaux 20, permet de régler l'alimentation du chapeau de soufflage 4 en gaz de pulvérisation. The gas chamber 16 is connected to the channels 9 and 10 by channels 20 (only one of which is shown). A device 21, interposed between the gas chamber 16 and the channels 20, adjusts the supply of the blower cap 4 spray gas.
A l'intérieur de la chambre 18 est disposé un piston 22, obturant la communication entre le conduit 17 et la chambre de gaz 16, mais pouvant se déplacer dans ladite chambre 18, à l'encontre de l'action d'un res- sort de compression 23, sous l'action de l'air comprimé amené par le conduit 19. Inside the chamber 18 is disposed a piston 22, closing the communication between the conduit 17 and the gas chamber 16, but able to move in said chamber 18, against the action of a resistor. compression fate 23, under the action of the compressed air brought by the conduit 19.
Le pistolet automatique montré par les figures comporte de plus une aiguille 24 traversant la chambre de gaz 16 et la chambre de produit 6. Du côté de la buse 2, l'aiguille 24 est pourvue d'un pointeau 25 apte à obturer la buse de pulvérisation 2. Du côté opposé au pointeau 25, l'aiguille 24 traverse le piston 22 et elle est reliée à celui-ci par un système d'emboîtement réglable 26 connu par ailleurs et permettant d'ajuster la sensibilité de l'ouverture de la buse 2. The automatic pistol shown in the figures further comprises a needle 24 passing through the gas chamber 16 and the product chamber 6. On the nozzle 2 side, the needle 24 is provided with a needle 25 capable of closing off the nozzle of 2. On the opposite side to the needle 25, the needle 24 passes through the piston 22 and is connected thereto by an adjustable interlocking system 26 known elsewhere and to adjust the sensitivity of the opening of the nozzle 2.
Une étoupe 27, traversée par l'aiguille 24, empêche le gaz propulseur de passer de la chambre de gaz 16 vers la chambre de produit 6, le long de ladite aiguille 24. De plus, cette étoupe 27 sert au guidage de l'aiguille 24, lorsque celle-ci effectue des mouvements de translation parallèlement à elle-même sous l'action du piston 22, lui-même soumis à l'action de l'air comprimé admis dans le conduit d'alimentation 19. A tow 27, through which the needle 24 passes, prevents the propellant gas from passing from the gas chamber 16 to the product chamber 6, along said needle 24. In addition, this tow 27 serves to guide the needle 24, when it performs translational movements parallel to itself under the action of the piston 22, itself subjected to the action of compressed air admitted into the supply conduit 19.
Du côté de la chambre de produit 6, l'étanchéité autour de l'aiguille 22 est assurée par un soufflet 28, dont l'extrémité arrière 29 est fixée par pincement entre les corps 1 et 15, le long du plan de joint P. L'extrémité avant 30 du soufflet 28 est conformée en bourrelet annulaire d'étanchéité 31 traversé par l'aiguille 24. En avant du bourrelet 31, l'extrémité avant 30 comporte un anneau racleur 32. Le soufflet 28 est étanche et il est réalisé en une seule pièce --incorporant les éléments 29 à 32--de matière naturelle ou synthétique, par exemple un caoutchouc ou analogue. On the side of the product chamber 6, the seal around the needle 22 is provided by a bellows 28, whose rear end 29 is fixed by clamping between the bodies 1 and 15, along the joint plane P. The front end 30 of the bellows 28 is shaped as an annular sealing bead 31 through which the needle 24 passes. In front of the bead 31, the front end 30 has a scraper ring 32. The bellow 28 is leaktight and is made in one piece --incorporant elements 29 to 32 - of natural or synthetic material, for example a rubber or the like.
Par ailleurs, l'aiguille 24 comporte un épaulement 33, apte à s'appliquer intérieurement contre le bourrelet 31 et partageant l'aiguille 24 en une partie avant de plus petit diamètre portant le pointeau 25 et une partie arrière de plus grand diamètre reliée au piston 22. Furthermore, the needle 24 has a shoulder 33, adapted to be applied internally against the bead 31 and sharing the needle 24 in a front portion of smaller diameter carrying the needle 25 and a rear portion of larger diameter connected to the piston 22.
On obtient donc ainsi, du côté de la chambre de produit 6, une étanchéité coulissante lâche autour de l'aiguille 24: lorsque le piston 22 est à sa position de repos sous l'action du ressort 23, aucun air comprimé n'étant admis dans le conduit d'alimentation 19, ledit piston 22 isole la chambre de gaz 16 du conduit 17 et le pointeau 25 obture la buse 2; le soufflet 28 est étendu longitudinalement vers l'avant, par la poussée exercée par l'épaulement 33 contre le bourrelet 31 (voir les figures 1 et 2) ; et lorsque le piston 22 est soumis à l'action du gaz comprimé admis dans le conduit d'alimentation 19, le pointeau est tiré vers l'arrière, ouvrant la communication entre la chambre de gaz 16 et le conduit 17 et dégageant la buse 2: ^ si aucun produit sous pression à pulvériser n'est admis dans la chambre de produit 6 par le conduit 7, aucune pression n'est exer- cée sur l'extrémité 30 du soufflet 28, de sorte que l'aiguille 24 n'est pas totalement suivi dans son mouvement de recul par ladite extrémité 30; le bourrelet 31 n'est donc plus en appui contre l'épaule-ment 33 (voir la figure 3) ; ^ si, au contraire, du produit sous pression à pulvériser est présent dans la chambre de produit 6, l'extrémité 30 du soufflet 28 est appliquée par ce produit contre l'épaulement 33 et cette extrémité 30 suit le mouvement de recul de l'aiguille 24, en comprimant longitudinalement le soufflet 28 (voir la figure 4). Thus, on the side of the product chamber 6, a loose sliding seal around the needle 24 is obtained: when the piston 22 is at its rest position under the action of the spring 23, no compressed air is admitted in the supply duct 19, said piston 22 isolates the gas chamber 16 from the duct 17 and the needle 25 closes the nozzle 2; the bellows 28 is extended longitudinally forwards, by the thrust exerted by the shoulder 33 against the bead 31 (see Figures 1 and 2); and when the piston 22 is subjected to the action of the compressed gas admitted into the supply duct 19, the needle is pulled backwards, opening the communication between the gas chamber 16 and the duct 17 and releasing the nozzle 2 if no pressurized product to be sprayed is admitted into the product chamber 6 via line 7, no pressure is exerted on the end 30 of the bellows 28, so that the needle 24 is not fully followed in its recoil movement by said end 30; the bead 31 is no longer in abutment against the shoulder-ment 33 (see Figure 3); if, on the other hand, the pressurized product to be sprayed is present in the product chamber 6, the end 30 of the bellows 28 is applied by this product against the shoulder 33 and this end 30 follows the recoil motion of the needle 24, longitudinally compressing the bellows 28 (see Figure 4).
Ainsi, en fonction des mouvements de l'aiguille 24, le soufflet 28 est soumis à une alternance d'extensions et de contractions longitudinales. Pour permettre une telle alternance, l'intérieur du soufflet 28 est relié à l'atmosphère extérieure par un conduit d'évent 34, par exemple pratiqué dans le corps 15. Thus, depending on the movements of the needle 24, the bellows 28 is subjected to an alternation of longitudinal extensions and contractions. To allow such alternation, the interior of the bellows 28 is connected to the external atmosphere by a vent duct 34, for example made in the body 15.
2863512 s2863512 s
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0314471A FR2863512B1 (en) | 2003-12-10 | 2003-12-10 | AUTOMATIC SPRAY GUN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0314471A FR2863512B1 (en) | 2003-12-10 | 2003-12-10 | AUTOMATIC SPRAY GUN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2863512A1 true FR2863512A1 (en) | 2005-06-17 |
| FR2863512B1 FR2863512B1 (en) | 2006-01-21 |
Family
ID=34610551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0314471A Expired - Fee Related FR2863512B1 (en) | 2003-12-10 | 2003-12-10 | AUTOMATIC SPRAY GUN |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2863512B1 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2903027A1 (en) * | 2006-07-03 | 2008-01-04 | Exel Ind Sa | AUTOMATIC SPRAY GUN |
| EP2108460A1 (en) * | 2007-01-30 | 2009-10-14 | Shunji Noshima | Spray gun |
| CN107127065A (en) * | 2017-05-08 | 2017-09-05 | 常州铭赛机器人科技股份有限公司 | Fluid micro injection apparatus and its execution system |
| CN107635671A (en) * | 2015-03-04 | 2018-01-26 | 赫斯姆喷漆系统专利申请号有限责任公司 | Spray gun, liquid guiding mechanism and the system with liquid guiding mechanism |
| WO2018205681A1 (en) * | 2017-05-08 | 2018-11-15 | 常州铭赛机器人科技股份有限公司 | Minute fluid jetting device |
| WO2018205679A1 (en) * | 2017-05-08 | 2018-11-15 | 常州铭赛机器人科技股份有限公司 | Fluid micro-injection device and execution system thereof |
| DE102018118738A1 (en) * | 2018-08-01 | 2020-02-06 | Sata Gmbh & Co. Kg | Base body for a spray gun, spray guns, spray gun set, method for producing a base body for a spray gun and method for converting a spray gun |
| US10702879B2 (en) | 2014-07-31 | 2020-07-07 | Sata Gmbh & Co. Kg | Spray gun manufacturing method, spray gun, spray gun body and cover |
| US10835911B2 (en) | 2016-08-19 | 2020-11-17 | Sata Gmbh & Co. Kg | Trigger for a spray gun and spray gun having same |
| EP3785803A1 (en) * | 2019-09-02 | 2021-03-03 | Exel Industries | Valve and system for applying a coating product comprising such a valve |
| US11141747B2 (en) | 2015-05-22 | 2021-10-12 | Sata Gmbh & Co. Kg | Nozzle arrangement for a spray gun |
| US11826771B2 (en) | 2018-08-01 | 2023-11-28 | Sata Gmbh & Co. Kg | Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for selecting a nozzle module from a set of nozzles for a paint job, selection system and computer program product |
| US11865558B2 (en) | 2018-08-01 | 2024-01-09 | Sata Gmbh & Co. Kg | Nozzle for a spray gun, nozzle set for a spray gun, spray guns and methods for producing a nozzle for a spray gun |
| US12097519B2 (en) | 2020-09-11 | 2024-09-24 | Sata Gmbh & Co. Kg | Sealing element for sealing a transition between a spray gun body and an attachment of a spray gun, attachment, in particular a paint nozzle arrangement for a spray gun and a spray gun, in particular a paint spray gun |
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| DE3421008A1 (en) * | 1984-06-06 | 1985-12-12 | Hermann Behr & Sohn Gmbh & Co, 7121 Ingersheim | Industrial robot or telemanipulator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4126321A (en) * | 1977-11-03 | 1978-11-21 | Nordson Corporation | Packingless bellows seal |
| US4294411A (en) * | 1979-07-05 | 1981-10-13 | Nordson Corporation | Electrostatic spray gun |
| DE3421008A1 (en) * | 1984-06-06 | 1985-12-12 | Hermann Behr & Sohn Gmbh & Co, 7121 Ingersheim | Industrial robot or telemanipulator |
| FR2788231A1 (en) * | 1999-01-11 | 2000-07-13 | Itw Surfaces & Finitions | SPRAY HEAD OF A PRODUCT SUCH AS PAINT |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008003850A1 (en) * | 2006-07-03 | 2008-01-10 | Exel Industries | Automatic spray gun |
| JP2009541048A (en) * | 2006-07-03 | 2009-11-26 | エクセル インダストリーズ | Automatic spray sprayer |
| US8205807B2 (en) | 2006-07-03 | 2012-06-26 | Exel Industries | Automatic atomizing spray gun |
| FR2903027A1 (en) * | 2006-07-03 | 2008-01-04 | Exel Ind Sa | AUTOMATIC SPRAY GUN |
| EP2108460A1 (en) * | 2007-01-30 | 2009-10-14 | Shunji Noshima | Spray gun |
| EP2108460A4 (en) * | 2007-01-30 | 2011-05-18 | Shunji Noshima | Spray gun |
| US10702879B2 (en) | 2014-07-31 | 2020-07-07 | Sata Gmbh & Co. Kg | Spray gun manufacturing method, spray gun, spray gun body and cover |
| CN107635671A (en) * | 2015-03-04 | 2018-01-26 | 赫斯姆喷漆系统专利申请号有限责任公司 | Spray gun, liquid guiding mechanism and the system with liquid guiding mechanism |
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| US10835911B2 (en) | 2016-08-19 | 2020-11-17 | Sata Gmbh & Co. Kg | Trigger for a spray gun and spray gun having same |
| US11384860B2 (en) | 2017-05-08 | 2022-07-12 | Changzhou Mingseal Robot Technology Co., Ltd. | Fluid micro-injection device and flow channel assembly thereof |
| WO2018205681A1 (en) * | 2017-05-08 | 2018-11-15 | 常州铭赛机器人科技股份有限公司 | Minute fluid jetting device |
| US11478805B2 (en) | 2017-05-08 | 2022-10-25 | Changzhou Mingseal Robot Technology Co., Ltd. | Minute fluid jetting device |
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| CN107127065A (en) * | 2017-05-08 | 2017-09-05 | 常州铭赛机器人科技股份有限公司 | Fluid micro injection apparatus and its execution system |
| WO2018205679A1 (en) * | 2017-05-08 | 2018-11-15 | 常州铭赛机器人科技股份有限公司 | Fluid micro-injection device and execution system thereof |
| DE102018118738A1 (en) * | 2018-08-01 | 2020-02-06 | Sata Gmbh & Co. Kg | Base body for a spray gun, spray guns, spray gun set, method for producing a base body for a spray gun and method for converting a spray gun |
| CN110787925A (en) * | 2018-08-01 | 2020-02-14 | 萨塔有限两合公司 | Spray gun base body, spray gun set, manufacturing base body and spray gun refitting method |
| EP3626352A1 (en) * | 2018-08-01 | 2020-03-25 | SATA GmbH & Co. KG | Base body for a spray gun, spray guns, spray gun set and method for converting a spray gun |
| US11801521B2 (en) | 2018-08-01 | 2023-10-31 | Sata Gmbh & Co. Kg | Main body for a spray gun, spray guns, spray gun set, method for producing a main body for a spray gun and method for converting a spray gun |
| US11826771B2 (en) | 2018-08-01 | 2023-11-28 | Sata Gmbh & Co. Kg | Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for selecting a nozzle module from a set of nozzles for a paint job, selection system and computer program product |
| US11865558B2 (en) | 2018-08-01 | 2024-01-09 | Sata Gmbh & Co. Kg | Nozzle for a spray gun, nozzle set for a spray gun, spray guns and methods for producing a nozzle for a spray gun |
| EP3785803A1 (en) * | 2019-09-02 | 2021-03-03 | Exel Industries | Valve and system for applying a coating product comprising such a valve |
| US12097519B2 (en) | 2020-09-11 | 2024-09-24 | Sata Gmbh & Co. Kg | Sealing element for sealing a transition between a spray gun body and an attachment of a spray gun, attachment, in particular a paint nozzle arrangement for a spray gun and a spray gun, in particular a paint spray gun |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2863512B1 (en) | 2006-01-21 |
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