EP2648851B1 - Procédé et dispositif de pulvérisation de colles - Google Patents

Procédé et dispositif de pulvérisation de colles Download PDF

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Publication number
EP2648851B1
EP2648851B1 EP12748386.5A EP12748386A EP2648851B1 EP 2648851 B1 EP2648851 B1 EP 2648851B1 EP 12748386 A EP12748386 A EP 12748386A EP 2648851 B1 EP2648851 B1 EP 2648851B1
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EP
European Patent Office
Prior art keywords
component
adhesive
spraying
mode
nozzle
Prior art date
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Active
Application number
EP12748386.5A
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German (de)
English (en)
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EP2648851A1 (fr
Inventor
Thomas Simmler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfa Klebstoffe AG
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Alfa Klebstoffe AG
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Priority to EP12748386.5A priority Critical patent/EP2648851B1/fr
Priority to PL12748386T priority patent/PL2648851T3/pl
Publication of EP2648851A1 publication Critical patent/EP2648851A1/fr
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Publication of EP2648851B1 publication Critical patent/EP2648851B1/fr
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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
    • B05B7/061—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with several liquid outlets discharging one or several liquids
    • 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
    • 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
    • B05B7/0846—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 jets being only jets constituted by a liquid or a mixture containing a liquid

Definitions

  • the invention relates to a method for spraying a one-component adhesive on surfaces.
  • the invention also relates to a spraying device for carrying out the method with a spraying device for spraying a one-component adhesive onto a surface.
  • 1K adhesives One-component adhesives based on polychloroprene dispersions in aqueous solution have been used in the foam industry for about 20 years. For example in the patent EP 0 624 634 these are extensively described. 1K adhesives may u. A. be applied with the aid of 1K spray guns, as in the US 2002 / 166902A is described. When bonding demanding objects, however, it may happen that the initial adhesion of these adhesives is insufficient.
  • 2-component adhesives have the disadvantage that technically complicated systems are necessary for their processing, which are also very expensive in terms of service and maintenance. It must be ensured that the mixing ratio between coagulant and adhesive component is constant. If the mixing ratio deviates too much from the target value, the adhesive does not show the desired properties and the bonding can not be carried out. The reason for this is the relatively high stability of the formulation; this is so stable that it shows no sufficient wet grip without coagulant. Only with an activator can the dispersion be destabilized to the extent that a setting process is triggered.
  • Plants for applying two components to a surface are also known from other technical fields, for example from the field of impregnation of material surfaces.
  • DE 10 2009 052654 A1 describes such a device that can spray a preservative and an additional hardener.
  • three embodiments only a combined spraying of the two components is possible. However, it is not intended to spray the components individually.
  • it is provided to spray first the preservative and shortly thereafter the additional hardener.
  • two Apptikationsieri are provided, wherein from the first application element, the preservative and from the second application element of the hardener is sprayed.
  • the object to be sprayed is transported by a conveyor belt from the first to the second application element.
  • the hardener is sprayed flat to the same extent as the preservative.
  • this is a method for spraying a one-component adhesive on surfaces with two defined modes, between which is switched.
  • a 1K adhesive is sprayed on alone.
  • an accelerator component for the 1K adhesive is also sprayed, whereby a beam of the 1K adhesive and a beam of the accelerator component mix with each other.
  • On the sprayed surface can then at least a portion of the one-component adhesive alone and at least a portion of the one-component adhesive combined with accelerator component are generated.
  • a method according to the invention in which it is possible to spray on an accelerator component only when required, offers several advantages: First, the initial adhesion of the adhesive is increased by the accelerator component, so that sites which are difficult to bond can nevertheless be glued reliably. Targeted application to these demanding areas minimizes the overall consumption of the accelerator component, since it is not necessary to apply it to the entire surface to be bonded. On easy-to-bond surfaces, there is no need for an accelerator. Due to the economical use of the accelerator component less water, which serves as a solvent for the accelerator component, applied to the easy-to-bond sites. These areas can then dry completely faster, as they will not be soaked unnecessarily.
  • 1K adhesives are characterized by the fact that they have an initial adhesion, ie they have a certain adhesive strength of their own, without the need for an auxiliary agent.
  • the adhesive power of 1K adhesives is only slightly reduced compared to the adhesive power of 2K adhesives. However, this difference can already be sufficient to no longer be able to connect surfaces that are difficult to bond sufficiently well. In particular, the bonding of elements which make different demands on the adhesive on the same workpiece is difficult to carry out with a 1K adhesive. So z. For example, a seat cushion for a sofa on a large area and a small side surface. The seat can be easily bonded to other substrates with virtually no tension.
  • the side surfaces represent a voltage bonding for the substrates to be bonded, in which a higher initial adhesion is desired. Similar problems are encountered when gluing sofa or chair frames made of wood with flexible foams; Also there occur high restoring forces, which must be absorbed with the adhesive.
  • An accelerator component increases the adhesive force of a 1K adhesive.
  • the accelerator component destabilizes the provided adhesive and thus accelerates the coagulation.
  • two components are applied to the hard-to-bond surfaces.
  • the one component itself already has an adhesive power.
  • the accelerator component is not supplied permanently, but only when needed. In contrast, when using 2K adhesives, constant delivery of both components is necessary.
  • the method offers a third mode in addition to the previously described first and second modes.
  • the accelerator component is sprayed alone.
  • the additional third mode thus offers even more flexibility in the process. It is possible for the user to sprinkle only with the accelerating component in places which he considers difficult to bond after application of the 1-component adhesive in the first mode. It is not necessary to apply the 1K adhesive again in such a case, and thus accept a higher material consumption and longer drying times. Overall, it is therefore possible to switch between the first, second and third modes.
  • a process that applies a 1K adhesive with an accelerator component (1K Plus system) provides greater production safety because the exact mixing ratio of the two components is not critical. Typically, 1K Plus systems have some tolerance in terms of mixing ratio.
  • the proportion of the accelerator component is 2 to 25 wt .-%, preferably 5 to 15 wt .-%, particularly preferably 8 to 12 wt .-%.
  • the switching between the first mode and the second mode can be done by operating a single control element.
  • a single control element with an off position and two operating positions. If the control element is in the first operating position, the 1K adhesive is supplied (first mode). When the control is in the second operating position, the 1K adhesive and the accelerator component are supplied (second mode).
  • the 1K adhesive is controlled via a first operating element, while the accelerator component is controlled via a second operating element.
  • the second operating element is additionally actuated when carrying out this method.
  • a method with three modes is preferably controlled by the actuation of two operating elements, wherein here too the flow of each component can be triggered or stopped with a control element.
  • the actuation of the first operating element corresponds to the first mode.
  • the actuation of the second control element corresponds to the third mode.
  • the simultaneous operation of both controls corresponds to the application of the 1K adhesive together with the accelerator component and thus the second mode.
  • the 1K adhesive is preferably a dispersion adhesive.
  • a dispersion adhesive In the water as a mobile phase adhesive components dispersed. By applying the dispersion to the surface to be bonded, the dispersant can escape; the Dispersion breaks. The concentration of the adhesive particles increases, and a layer is formed which connects the elements to be bonded together. Dispersion adhesives are safer to use due to the use of water as a solvent as there are no flammable or explosive solvents. In addition, no solvent vapors are released that are hazardous to health.
  • the dispersion adhesive is preferably based on polychloroprene.
  • Polychloroprene has a relatively high initial adhesion and is easily mixed with other substances, eg. B. modifiable with fillers.
  • the accelerator component is an aqueous salt solution.
  • the accelerator component may also be a dilute acid.
  • a sprayer suitable for spraying an adhesive on surfaces comprises a spraying device for spraying a one-component adhesive onto a surface. Further, an auxiliary sprayer is provided for additionally spraying an accelerator component for the one-component adhesive. There is a first actuating device for the spray device and a second actuating device for the additional spray device. The two actuating devices are designed such that it is possible to switch between the first and the second mode. The spraying device is designed such that in the second mode the one-component adhesive and the accelerator component mix outside the device. Thus, by spraying the sprayer on the surface, at least a portion of the one-component adhesive alone and at least a portion of the one-component adhesive may be combined with the accelerator component.
  • the spray device comprises at least a first material guide for the 1K adhesive, which can be opened or closed via a first valve.
  • This first material guide is arranged within a housing. The material is about a supplied to the first material line.
  • the valve is controlled by a first actuator, which is located on the outside of the housing. If the valve is open, the 1 K adhesive is sprayed through a spray nozzle.
  • the sprayer on a Saksprüh drove with a second material guide and a second valve.
  • This second material guide is provided for the accelerator component.
  • the accelerator component is supplied via a second material line and sprayed via a secondary nozzle.
  • the sprayer is designed such that the 1K adhesive can be sprayed independently of the accelerator component.
  • a sprayer designed in this way allows a flexible use of the accelerator component and thus a material-sparing type of bonding of materials which have areas to be bonded differently.
  • the sprayer according to the invention can also be used to apply a 1K adhesive alone. So it is not necessary to provide different spraying devices for the spraying of a 1 K-adhesive and a 1 K-plus-system. Especially for a casual user, this additional versatility of the sprayer is an advantage.
  • the sprayer on a single common control element, with which is switched between the first and the second mode.
  • a single control allows for very easy handling of the sprayer and minimizes potential design errors.
  • the one control element has a rest position and two operating positions. In the rest position no material is sprayed. If the operating element is in the first operating position, only the spraying device is actuated and the 1 K adhesive is supplied. If the operating element is in the second operating position, then both the spraying device and the auxiliary spraying device are actuated and the 1K adhesive and the accelerator component are supplied.
  • a technical means which can control the supply of a material ie z. B. opens a valve.
  • the one control element is a lever with a rest position and two operating positions.
  • the first mode of the method is executed.
  • the lever is pulled more to the second operating position, the second mode is executed.
  • the operating element can be designed in such a way that it has to be constantly held in the desired position by a user. But it can also be provided that the one and / or the other position can be fixed by z. B. is executed latched.
  • each component is controlled via its own control element.
  • the sprayer has two controls that are operated independently.
  • the second operating element is additionally actuated when carrying out this method.
  • a method with three modes is preferably controlled by the actuation of two operating elements, wherein here too the flow of each component can be triggered or stopped with a control element.
  • the actuation of the first operating element corresponds to the first mode.
  • the actuation of the second control element corresponds to the third mode.
  • the first control element can be brought into a pre-position in which only compressed air, but no 1 K adhesive is sprayed.
  • the accelerator component can be injected. Simultaneous operation of both operating elements corresponds to the application of the 1K adhesive together with the accelerator component and thus the second mode.
  • the controls may be z. B. to ironing, lever, tilt, rocker, slide switch, knobs and / or push buttons act.
  • Two controls on a sprayer can be the same or different.
  • the first operating element is designed as a lever, while the second operating element is a push button.
  • the push button can be preferably with a finger, z. B, operate the thumb.
  • a fixing possibility for the first and / or the second control element can be provided, which is also operated with only one finger.
  • a lever can z. B. are fixed by a bolt, which locks the lever in the activated state and leaves the lever in the deactivated state to move freely.
  • the sprayer can also be constructed such that a combination of both controls is constructed by a simple operation. Through such a coupling, the accelerator component always flows out as soon as the first control element for the 1 K adhesive is actuated.
  • the second control over which the addition of the accelerator component is controlled can be set in two positions: on and off.
  • An on / off switch has a simple design and is therefore inexpensive.
  • the spray device is designed such that mix the 1 K adhesive and the accelerator component outside the sprayer.
  • the atomizer nozzle and the sub-nozzle are aligned at the output of the device such that a beam of 1K adhesive and the accelerator component mix with each other.
  • the accelerator component is injected into the main jet of the 1K adhesive.
  • a mixing of the two components outside of the sprayer allows a simpler structure of the device, since it can be dispensed with a mixing chamber in its interior.
  • no adhesive mixture is produced with an accelerated setting behavior within the sprayer. This simplifies or even eliminates time-consuming and material-consuming cleaning procedures.
  • the atomizer nozzle is designed as a broad jet nozzle.
  • two air ducts are arranged on the air head laterally of the atomizer nozzle such that the atomizer nozzle lies on a connecting line between the two air ducts.
  • the atomizer nozzle itself produces a round jet. Through the air from the two air channels, the material to be sprayed is applied in a broad jet.
  • the secondary nozzle is preferably an injection nozzle.
  • the injector via which the accelerator component is added is mounted laterally on the atomizer nozzle.
  • the injection nozzle is oriented such that the jet of the accelerator component as perpendicular as possible to the spray axis of the spray nozzle, d. H. perpendicular to the broad-jet spray cone, is sprayed.
  • the injection nozzle is preferably provided directly in the region of a lateral air duct on the air head, ie the injection nozzle is a fixed part of the air head.
  • the injection nozzle can be mounted in the region of an air duct.
  • the air cap in the region of an air duct on a front extension, which provides space for an injection nozzle.
  • This arrangement allows the accelerator component to be injected at an angle of 90 ° into the broad-jet spray cone of the 1K adhesive.
  • this extension on the airhead is a disadvantage because it can be easily damaged when handling the sprayer or broken completely.
  • the injector may be provided directly adjacent to an air passage.
  • the injection angle is then slightly lower than 90 °, it is z. B. in a range of 80 ° - 90 °. The angle is reasonably good for effective mixing, while the air head has no exposed area that is easily damaged.
  • the injection nozzle may be present as a separate component that is flexibly mounted on the commercially available air head of a spray nozzle. Also, a separate injection nozzle is aligned so that its beam is sprayed as possible at an angle of 90 ° in the broad-jet spray cone of 1K adhesive. Depending on the injection nozzle but requires more or less space, so that the angle is actually between 30 ° and 80 °.
  • the injector may also be mounted at other angles. However, then a complete mixing of the two components is not guaranteed. If the injection nozzle is oriented in such a way that the accelerator component is injected in the plane of the spray jet, mixing of the two components takes place only to a limited extent. Under certain circumstances, however, the construction of the air head or a space-consuming injection nozzle does not allow a more favorable arrangement.
  • the sprayer is designed in the manner of a hand-operated spray gun. Their mode of action can be explained as follows: The liquid to be sprayed is atomized by means of a pressure difference into small drops. The droplets then hit a surface to be sprayed, resulting in a surface film. The material can be fed via a flow cup, suction cup or pressure lines. The pressure difference will vary depending on the construction of the gun generates and identifies the respective spraying process. Decisive is also a corresponding nozzle set, consisting of nozzle needle, fluid nozzle and matching air cap. Overall, therefore, the amount of material, the amount of air and the type of spray can be adjusted. Spray guns are used to apply paints, varnishes and adhesives. Such a sprayer is easy to handle and produces even layers of the substances to be sprayed.
  • the sprayer is designed as a sprayer, which is controlled electronically or pneumatically. Since the device is not hand-operated, it does not have to have a specific outer shape, which makes operation easier. The necessary for the spraying elements can also be present without housing.
  • the sprayer is a commercially available 1K air operated gun with additional equipment.
  • a further supply of material for the accelerator component, an operating element for switching on and off the accelerator supply, and an injection nozzle for the accelerator are provided on the outside of the spray gun.
  • the accelerator component is directed under pressure into the additional fluid supply.
  • the pressure is preset.
  • a flow regulator can be arranged on the additional material guide.
  • the accelerator component can also be conducted via a free-flow system into the additional material supply, wherein a supply of compressed air or a pump can be dispensed with.
  • the accelerator component is in one appropriate storage vessel stored higher and directed solely by gravity in the additional material supply.
  • the spray gun is designed to have one-handed controls.
  • the spraying process is carried out by one-handed operations. So it is possible to operate simultaneously with one hand, the lever for spraying the 1K adhesive, as well as a switch or button for releasing the supply of the accelerator component, preferably with a finger, z. B. the thumb to use.
  • a spray device 1 is shown, with which the inventive method can be performed.
  • the sprayer 1 allows a simple switching between the first and second modes or third mode, if provided.
  • the spray device 1 consists of a housing 2, which has two operating elements, which are designed as first and second switches 3 and 4.
  • the first valve 5 of the first material guide 6 can be actuated via the first switch 3.
  • the second valve 7 of the second material guide 8 can be controlled.
  • At the end of the first material guide 6 there is an atomizer nozzle 9.
  • the auxiliary nozzle 10 is arranged.
  • a switch is understood to mean a functional element which has two clearly defined positions. There is no stable position between these unique positions. In the ideal case, the switch abruptly changes the operating mode of the device, comparable to an electrical toggle switch. In other words, the switch has two intrinsically stable states, one of which defines the state “valve open” and the other the state “valve closed”.
  • the sprayer 1 is shown in the first mode.
  • the first valve 5 is opened, and the 1K adhesive is led into the first material guide 6.
  • the 1K adhesive exits through the atomizer nozzle 9 in the form of a first jet 11.
  • the second switch 4 is not actuated, so that the second valve 7 remains closed and no material is passed through the second material guide 8.
  • Fig. 1b shows the same sprayer 1 in the second mode.
  • the second valve 7 is also opened by actuating the second switch 4.
  • the 1K adhesive flows through the first material guide 6 and emerges radially at its end through the atomizer nozzle 9
  • the accelerator component is passed through the second material guide 8. It emerges at the end of the second material guide 8 through the auxiliary nozzle 10 in the form of a second jet 12.
  • the atomizing nozzle 9 and the sub-nozzle 10 are arranged such that the 1K adhesive and the accelerator component mix outside with each other.
  • the optional third mode is in the Fig. 1c displayed.
  • the third mode only the accelerator component is sprayed.
  • only the second switch 4 is actuated, so that the second valve 7 is opened and the accelerator component passes through the second material guide 8 to the sub-nozzle 10.
  • the first switch 3 is not actuated; no 1 K adhesive is sprayed.
  • the Fig. 2a shows an object 20 with areas that are difficult to glue different.
  • the surfaces 21 of the object 20 are easy to bond, the use of a 1 K adhesive with a sufficient adhesive force is completely sufficient in these areas.
  • the areas of the edges 22 and corners 23 are demanding. In these areas, it may be necessary to use an accelerator component in order to increase the initial force of the adhesive.
  • Fig. 2b shows the object 20 with different difficult to bond areas after application of the adhesive and possibly the accelerator component according to the described method.
  • the surfaces were sprayed in the first mode, on top of which is a 1K layer 24 of the 1K adhesive.
  • the edges and corners have been sprayed in the second mode. So they have a 1K-plus layer 25, consisting of the 1K adhesive and the accelerator component.
  • the areas of the edges and corners were first sprayed in the first mode exclusively with the 1K adhesive and afterwards with the accelerator component in the third mode.
  • This two-stage application also leads to the 1K-plus layer 25.
  • the different layers 24 and 25 are not necessarily sharply delimited from each other, the transition can also be fluid.
  • the Extension of the 1 K plus layer 25 vary, it is not necessarily limited to a certain distance from the edge or corner.
  • Fig. 3 schematically shows a commercial 1K spray gun 30, with which it is not possible, however, turn on if necessary, another component.
  • the 1 K spray gun 30 has a housing 31 with a spray head 32 and a handle 33.
  • the spray gun 30 has a hook 34 for hanging.
  • a compressed air line 35 Through the spray gun passes through a compressed air line 35.
  • a compressed air line 35 At its end on the handle 33 is an air port 36, on the z. B. a compressor is connected.
  • a slide valve 37 In the compressed air line is a slide valve 37.
  • the compressed air line 35 opens in the front region 38 of the spray gun 30.
  • the compressed air line 35 is divided into an inner region 39 and an outer region 40 of the compressed air line 35th
  • a material supply 41 is provided in the front region 38 of the spray gun 30.
  • the material to be sprayed can be supplied via a pressure line or a suction cup and connected via the material connection 42.
  • the material supply 41 opens below the compressed-air line 35.
  • a material needle 43 runs through the material supply 41.
  • an air distributor ring 44 is placed in front of the compressed air line 35 and the material supply 38. This distributes the compressed air so that it continues to flow in a wider cone, the compressed air from the inner region 39 and the outer region 40 of the compressed air line 35 is separated from each other.
  • a material nozzle 45 is mounted in front of the air distributor ring 44. This is constructed in three parts.
  • the inner part of the material nozzle 45 is an extension of the material supply 41 and is screwed directly onto it. It is pulled out towards the front 46 and has an opening in the middle, which is dimensioned such that it can be closed by the material needle 43.
  • a first ring 47 is arranged from air ducts. Farther outside is a second ring 48 from air ducts.
  • the first ring 47 is connected to the inner portion 39 of Compressed air line 35 is connected, while the second ring 48 communicates from air channels with the outer region 40 of the compressed air line 35.
  • an air head 49 is set and fixed with an air head nut 50 on the housing 31 of the spray gun 30.
  • This air head 49 has in the middle a round opening 51, in the extended tip 46 of the material nozzle 45 projects.
  • the opening 51 is formed significantly larger than the tip 46 of the material nozzle 45 and forms an outlet for the compressed air.
  • the air head 49 has lateral air channels 52 which are located on two attachments 53. About these air channels 52, the shape of the spray is designed. Through these air channels 52, the compressed air can flow, which is passed through the second ring 48 from air channels of the material nozzle 45.
  • the spray gun 30 is actuated via the trigger lever 60.
  • the trigger lever 60 is pulled to an operating position.
  • the pre-air is opened, d. H. it is the valve 37 of the compressed air line 35 is actuated.
  • the air head 49 exits from the opening 51 and possibly from the air channels 52 an air jet.
  • the material needle 43 is withdrawn, whereby the material to be sprayed passes into the nozzle.
  • the closing takes place in reverse order. It is possible to hold the trigger lever 60 in an intermediate position, so that only compressed air is passed through the gun 30.
  • the quantity of atomizing air can be determined by adjusting the air volume regulation 67 via the air quantity regulation 61.
  • the cone of the valve 37 is opened.
  • the valve spring 62 the cone of the valve 37 is returned when releasing the trigger lever 60.
  • the amount of material to be sprayed can be adjusted.
  • the needle spring 63 By means of the material adjustment 64 it is determined how far the material needle 43 is pushed back out of the tip 46 of the material nozzle 45, and how much material can flow out through it.
  • the shape of the spray jet can be determined, since in this way the amount of air flowing into the outer ring 48 of the air channels at the material nozzle 45 and then into the Air passages 52 of the air cap 49 flows, is regulated. If the outer region 40 of the compressed air line 35 is completely closed with the cone 66, no compressed air can flow into the channels 52 of the air cap 49; the material is sprayed in a round jet. If the cone 66 is withdrawn, then compressed air flows through the channels 52 of the air cap 49. The spray jet which emerges in a round manner can thus be delimited laterally and brought into the form of a broad jet.
  • Fig. 4a, b show a material nozzle 45 in the front and in the side view.
  • the central tip 46 of the fluid nozzle 45 is extended to the front and has a material opening 80. Through the material opening 80, the material to be sprayed emerges when the material needle 43, which lies in the material channel 81 of the material nozzle, is withdrawn.
  • Fig. 5 shows the basic structure of a spray nozzle 82 in the front view.
  • the air head 49 has an opening 51 in the middle. Through this opening, the tip 46 of the material nozzle 45 can be seen with the material opening 80.
  • two overpressure openings 83 are provided.
  • the side 51 of the opening 51 two essays 53 having air channels 52, which are directed in the area in front of the opening 51.
  • material emerges from the material opening 80 it is sprayed by the air from the opening 51 in an omnidirectional jet.
  • the air from the air channels 52 of the circular beam is bounded on the sides and thus formed into a broad jet with a spray axis 84.
  • Fig. 6 shows a first inventive 1K-plus spray gun 100, with a 1K adhesive and optionally an accelerator component can be sprayed.
  • the 1 K-plus spray gun 100 corresponds to the 1K spray gun 30 with additional elements.
  • a second material supply 101 for the accelerator component which opens into the injection nozzle 102.
  • the injection nozzle is mounted in the region of the air head 49.
  • a valve 103 via which the flow of the accelerator component can be controlled.
  • the 1 K-plus spray gun 100 is actuated via the trigger lever 60.
  • the trigger lever 60 has a second operating position. Will the Trigger lever 60 brought into the first operating position described above, first the compressed air and then enter the material in the nozzle.
  • the trigger lever 60 can be brought into a second operating position in which it is pulled even more to the handle 33.
  • the push button 104 is actuated, which communicates with the valve 103.
  • the valve 103 Upon actuation of the push button 104, the valve 103 is opened, and the accelerator component can pass through the second material supply 101 to the injection nozzle 102, from where it is then sprayed into the main jet of the 1K adhesive.
  • the entire operation of the first inventive 1 K-plus spray gun 100 is done with one hand;
  • the 1K-plus spray gun 100 is held in one hand and the lever 60 is held with one finger of this hand, e.g. B. the index finger or the middle finger, in which he is pulled in the direction of the handle 33.
  • Spraying the 1K adhesive by operating the lever in the first operating position corresponds to the first mode.
  • the joint spraying of the 1K adhesive and the accelerator component by operating the lever in the second operating position corresponds to the second mode.
  • the amount of the 1K adhesive is increased when switching from the first to the second mode. Due to the stronger pulling of the trigger lever 60 to the handle 33, the material needle 43 is further retracted, thus providing more adhesive available.
  • Fig. 7 shows a second inventive 1K-plus spray gun 200, with a 1K adhesive and optionally an accelerator component can be sprayed, with two controls, namely lever 60 and push button 201 are provided for switching between the modes.
  • the 1K-plus spray gun 200 corresponds in its internal structure of the commercial 1K spray gun 30 with additional elements. The spraying of the 1K adhesive is controlled according to the principle described above with the lever 60.
  • a second material supply 202 for the accelerator component In addition, on the outside of the housing 31 there is a second material supply 202 for the accelerator component. It opens into the injection nozzle 203, which in the region of Air head 49 is attached. The second material supply 202 passes through an additional housing 204, which is attached to the trigger lever 60.
  • the second material supply 202 is a valve 205, which is controlled by means of the push button 201, which is located on the additional housing 204.
  • the flow of the accelerator component can thus be switched on or off by pressing the push button 201.
  • the valve 205 is opened, the accelerator component flows into the further section of the second material supply 202, through a flow regulator 206 to the injection nozzle 203.
  • the trigger lever 60 is operated again with the index finger, the push button 201 is applied such that it z. B. can be operated with the thumb.
  • Trigger lever 60 and push button 201 can be operated with the same hand. By operating the trigger lever 60 is sprayed in the first mode. By additionally pressing the push button 201 one switches to the second mode.
  • the trigger 60 In order to spray only the accelerator component in the third mode, the trigger 60 must be brought into the pre-position in which only compressed air flows out, but no material from the material nozzle 45 occurs.
  • the accelerator component By simultaneously pressing the push button 201, the accelerator component is injected into the air cone and thus sprayed exclusively the accelerator component.
  • Fig. 8a, b each show a spray nozzle 82 with an injection nozzle 102.
  • This orientation of the injection nozzle 102 is a variant that can be implemented particularly technically simple. It forms a compromise between the preferred angle of 90 ° and the space requirement of the injection nozzle 102
  • Fig. 8c, d show spray nozzles, in which an injection nozzle is integrated in the air head of the atomizer nozzle.
  • an atomizer nozzle 301 having an air cap 302 which includes a conventional cap 53 with two air channels 52, and a modified cap 303.
  • This essay is larger and has in addition to two air channels 52 for the compressed air in addition to an opening 304, which Injector can be used.
  • an injection angle of ⁇ 80 ° can be realized.
  • an attachment may be made higher than usual, such as the modified attachment 305 of the atomizing nozzle 306 in Fig.
  • the higher attachment provides enough space to provide an additional opening 307 above the air channels 52, which may then serve as the accelerator component injector.
  • ⁇ 90 ° into the broad jet spray cone of the 1K adhesive.
  • Fig. 9 one sees the arrangement of the atomizer nozzle 82 with an injection nozzle 102 at an angle of 45 ° to the spray axis 84 in a side view.
  • the angle ⁇ which occupy the rays of the two components to each other, is 30 °. In principle, the angle ⁇ should be less than 45 °.
  • upholstered furniture such as chairs, armchairs, sofas and corresponding cushions.
  • the sprayers can basically have different housing shapes, as spray guns.
  • hangers or handles can be designed differently or completely omitted.
  • atomizing nozzles can be used as wide jet nozzles, z. B. round jet nozzles.
  • the design of the controls may vary. So levers, buttons and / or knobs may be provided except levers and snaps.
  • the materials to be sprayed in storage containers z. B. present in flow or suction cups, but they can also be passed through pipes from larger tanks in the sprayer.
  • the arrangement of the material supply can also be configured differently, so the material can also be supplied from above or from the side.
  • a spray gun with only one control element is designed such that the amount of adhesive remains constant when switching between the first and second modes.
  • the further retraction of the material needle 43 during further pulling the trigger must be prevented, z. B. by a telescopic structure of the material needle or by a pulling device with a spring.
  • a method which facilitates the spraying of objects with suitable adhesive.
  • a sufficiently good 1K adhesive is applied to save material.
  • the same 1K adhesive can be used in combination with an accelerator component. The switching between these and possibly other modes can be performed by a simple action with only one hand.

Landscapes

  • Nozzles (AREA)

Claims (15)

  1. Procédé de pulvérisation d'un adhésif à un composant sur des surfaces (21),
    caractérisé en ce que
    en plus d'un premier mode dans lequel l'adhésif à un composant est pulvérisé seul, il utilise un deuxième mode dans lequel un composant d'accélération de l'adhésif à un composant est pulvérisé conjointement avec l'adhésif à un composant, un faisceau d'adhésif à un composant et un faisceau de composant d'accélération se mélangeant l'un à l'autre et
    en ce que l'on commute entre le premier et le deuxième mode de manière à pouvoir former sur la surface au moins une zone contenant uniquement l'adhésif (24) à un composant et au moins une zone contenant l'adhésif à un composant et le composant d'accélération (25).
  2. Procédé selon la revendication 1, caractérisé en ce qu'il utilise en plus un troisième mode dans lequel seul le composant d'accélération est pulvérisé, avec commutation entre le premier, le deuxième et le troisième mode.
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que la teneur en composant d'accélération lors de la pulvérisation dans le deuxième mode est de 2 à 25 % en poids, de préférence de 5 à 15 % en poids et de façon particulièrement préférable de 8 à 12 % en poids.
  4. Dispositif (1) en vue de l'exécution du procédé selon la revendication 1, le dispositif présentant :
    a) un dispositif de pulvérisation qui pulvérise un adhésif à un composant sur une surface (21),
    b) un dispositif supplémentaire de pulvérisation qui pulvérise en supplément un composant d'accélération de l'adhésif à un composant,
    c) un premier dispositif d'actionnement (3) pour le dispositif de pulvérisation et un deuxième dispositif d'actionnement (4) pour le dispositif supplémentaire de pulvérisation,
    d) le dispositif étant configuré de telle sorte que l'adhésif à un composant et le composant d'accélération se mélangent à l'extérieur du dispositif,
    caractérisé en ce que
    e) le premier et le deuxième dispositif d'actionnement sont configurés de telle sorte que l'on puisse commuter entre le premier et le deuxième mode de manière à pouvoir former sur la surface au moins une zone contenant uniquement l'adhésif (24) à un composant et au moins une zone contenant l'adhésif à un composant et le composant d'accélération (25).
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif de pulvérisation présente une tuyère de pulvérisation (82) pour l'adhésif à un composant et le dispositif de pulvérisation supplémentaire une tuyère d'injection (102) pour le composant d'accélération.
  6. Dispositif selon la revendication 5, caractérisé en ce qu'il présente un élément de commande (60) commun au premier et au deuxième dispositif d'actionnement, qui présente au moins deux positions de fonctionnement, une première position de fonctionnement actionnant uniquement le dispositif de pulvérisation et une deuxième position de fonctionnement actionnant à la fois le dispositif de pulvérisation et le dispositif supplémentaire de pulvérisation.
  7. Dispositif selon la revendication 5, caractérisé en ce que la pulvérisation de l'adhésif à un composant est déclenchée par un premier élément de commande (60) et la pulvérisation du composant d'accélération par un deuxième élément de commande (201), les deux éléments de commande étant indépendants l'un de l'autre.
  8. Dispositif selon la revendication 7, caractérisé en ce que le deuxième élément de commande présente deux positions, à savoir marche et arrêt.
  9. Dispositif selon l'une des revendications 5 à 8, caractérisé en ce que la tuyère de pulvérisation (82) et la tuyère d'injection (102) sont orientées l'une vers l'autre à la sortie du dispositif de telle sorte qu'un faisceau d'adhésif à un composant et un faisceau de composant d'accélération se mélangent l'un à l'autre.
  10. Dispositif selon l'une des revendications 4 à 9, caractérisé en ce que la tuyère de pulvérisation est une tuyère à faisceau large sur laquelle, en plus de l'élément de pulvérisation, deux canaux d'air sont prévus pour former le faisceau.
  11. Dispositif selon l'une des revendications 4 à 10, caractérisé en ce que la tuyère d'injection (102) est disposée dans une plage angulaire comprise entre 30° et 90° et de préférence un angle de 90° par rapport à l'axe de pulvérisation de la tuyère de pulvérisation.
  12. Dispositif selon l'une des revendications 4 à 11, caractérisé en ce qu'il est configuré à la manière d'un pistolet de projection (30) entraîné par air comprimé.
  13. Dispositif selon la revendication 12, caractérisé en ce qu'il est configuré comme pistolet de projection (200) à un composant entraîné par air comprimé avec une tuyère d'injection (203), une amenée supplémentaire de matière (202) et un élément de commande (201).
  14. Dispositif selon la revendication 13, caractérisé en ce qu'un régulateur de débit (206) est prévu sur l'amenée supplémentaire de matière.
  15. Dispositif selon l'une des revendications 4 à 14, caractérisé en ce que les éléments de commande (60, 201) sont disposés de manière à pouvoir être actionnés à une seule main.
EP12748386.5A 2011-08-17 2012-08-14 Procédé et dispositif de pulvérisation de colles Active EP2648851B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12748386.5A EP2648851B1 (fr) 2011-08-17 2012-08-14 Procédé et dispositif de pulvérisation de colles
PL12748386T PL2648851T3 (pl) 2011-08-17 2012-08-14 Sposób natryskiwania klejów

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11405304A EP2559491A1 (fr) 2011-08-17 2011-08-17 Procédé et dispositif de pulvérisation de colles
EP12748386.5A EP2648851B1 (fr) 2011-08-17 2012-08-14 Procédé et dispositif de pulvérisation de colles
PCT/CH2012/000186 WO2013023313A1 (fr) 2011-08-17 2012-08-14 Procédé de pulvérisation d'adhésifs

Publications (2)

Publication Number Publication Date
EP2648851A1 EP2648851A1 (fr) 2013-10-16
EP2648851B1 true EP2648851B1 (fr) 2014-04-30

Family

ID=46704419

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Application Number Title Priority Date Filing Date
EP11405304A Withdrawn EP2559491A1 (fr) 2011-08-17 2011-08-17 Procédé et dispositif de pulvérisation de colles
EP12748386.5A Active EP2648851B1 (fr) 2011-08-17 2012-08-14 Procédé et dispositif de pulvérisation de colles

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11405304A Withdrawn EP2559491A1 (fr) 2011-08-17 2011-08-17 Procédé et dispositif de pulvérisation de colles

Country Status (3)

Country Link
EP (2) EP2559491A1 (fr)
PL (1) PL2648851T3 (fr)
WO (1) WO2013023313A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419491A (en) * 1994-05-23 1995-05-30 Mattson Spray Equipment, Inc. Two component fluid spray gun and method
DE102009052654A1 (de) * 2009-11-11 2011-05-12 Dürr Systems GmbH Vorrichtung und Verfahren zur Konservierung von Bauteilen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505618A1 (de) 1985-02-19 1986-08-21 Kopperschmidt-Mueller Gmbh & Co Kg, 4800 Bielefeld Verfahren zum beschichten von gegenstaenden mit hilfe eines spruehstrahls und vorrichtung zur durchfuehrung dieses verfahrens
CH685013A5 (de) 1993-05-11 1995-02-28 Alfa Klebstoffe Ag Aufsprühbare Dispersion und Verfahren zum elastischen Verkleben zweier Substratflächen.
GB2372465B (en) 2001-02-26 2004-07-14 Itw Ltd A spray gun
DE202005018206U1 (de) 2005-11-18 2006-02-09 Desoi Gmbh Zweikomponenten-Spritzpistole mit Außenmischung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419491A (en) * 1994-05-23 1995-05-30 Mattson Spray Equipment, Inc. Two component fluid spray gun and method
DE102009052654A1 (de) * 2009-11-11 2011-05-12 Dürr Systems GmbH Vorrichtung und Verfahren zur Konservierung von Bauteilen

Also Published As

Publication number Publication date
WO2013023313A1 (fr) 2013-02-21
EP2559491A1 (fr) 2013-02-20
PL2648851T3 (pl) 2014-09-30
EP2648851A1 (fr) 2013-10-16

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