DE102016208121A1 - Spray device and system with a spray device and a cartridge - Google Patents

Abstract

A spray device (10) for applying liquid materials to surfaces is described. The spray device (10) comprises a spray head (20) with a material nozzle (25a) which has a material outlet opening (22), and a housing (30) having a longitudinal axis L, on which the spray head (10) and a compressed air connection (40) are arranged. In the housing (30) is an axially displaceable material needle (90) having a first end (92 a) and a second end (92 b), wherein the first end (92 a) with the material outlet opening (22) cooperates, and a manual Actuator (60) arranged to move the material needle (90). The housing (30) is rod-shaped, wherein in the housing a receiving chamber (120) for a liquid material containing cartridge (130) is arranged The receiving chamber (120) has rotational and / or latching connection means for releasably securing the cartridge (130) ,

Description

The invention relates to a spray device for applying liquid materials to surfaces according to the preamble of claim 1. The invention also relates to a system of injection device and cartridge.

Spraying devices, such as e.g. Spray guns, e.g. used for applying paint in the automotive or furniture industry. The material to be sprayed is discharged through the material needle controlled material nozzle, e.g. surrounded by a round jet air nozzle. To supply the air nozzle with compressed air, it is necessary that the spray device has a compressed air connection, with which it can be connected to a compressed air generating device.

For coating large areas correspondingly much material is required, which usually has to be supplied via a material line or a correspondingly large material container of the spray device.

From the DE 42 13 826 A1 a spray gun is known, which is connected to a compressed air system, wherein the liquid medium is brought together with the compressed air by means of a needle, which is designed to transport the color hollow. The known systems are intended for the application of larger quantities of liquid media.

From the WO 2010/126814 A1 is a spray gun is known, which is also designed to process larger amounts of application material. This spray gun is fed to two components that must be mixed together before spraying. For this purpose, two material connections are provided on the spray gun, where z. B. can be mounted with material filled pressure vessel from which the respective materials are fed to a arranged in the interior of the spray gun mixing chamber.

In the repair of surfaces, however, only small amounts of material are needed, and often a quick change of the coating material is desirable. In addition, the required quantities of material are so small that the usual stirring and filling in a container leads to the fact that unused materials must be destroyed. In addition, it is desirable that the spray device with great accuracy over the often small repairs can be performed.

The WO 2013/072500 A1 discloses a spray gun on which a paint container is arranged. Within the spray gun, a motor with an impeller is arranged, with which an air flow for supplying air nozzles is arranged.

The GB 2 041 247 A discloses a hot melt adhesive gun having a thermoplastic adhesive receiving chamber which is melted and delivered to the exit port by means of a piston movably disposed in the receiving chamber. The receiving chamber is closed by a cap or cup-shaped element and has no connection to the compressed air connection. The material needle is permanently installed and can not be moved.

The US 3,554,450 A also describes a spray gun with permanently installed material needle. The spray gun is operated with water, which is to mix with the contents of a cartridge.

It is therefore an object of the invention to provide a spray device with which different materials can be applied in a simple manner in small quantities with great accuracy on a surface.

This object is achieved with a spraying device according to the features of claim 1.

The spraying device is characterized in that a receiving chamber for a cartridge containing the liquid material is arranged in the housing and that the receiving chamber has turning and / or latching connection means for the detachable fastening of the cartridge.

The housing is rod-shaped and has a longitudinal axis L. The rod-shaped design of the housing has the advantage that the spray device can be manually held like a pen and the spray can be performed precisely over the surface to be coated. In particular, in repair and repair work on coated surfaces, but also in the artistic field, where it also depends on great accuracy in beam guidance, the injection device according to the invention can be used.

The rotary and / or latching connection means preferably comprise an internal thread and / or an external thread and / or a bayonet connection. For this purpose, a cartridge to be inserted in each case has complementary connecting means. This enables a secure and strong but detachable connection.

The bayonet connection preferably has one or more circumferentially arranged latching projections and circumferentially between the latching projections recesses for latching lugs of a Cartridge on. When inserting a cartridge circumferentially arranged on the cartridge locking lugs can be moved through the recesses along the longitudinal axis L. Subsequently, the cartridge is rotated about the longitudinal axis and relative to the receiving chamber, whereby the latching lugs are moved behind the latching projections, so that withdrawal of the cartridge along the longitudinal axis is prevented.

The rotary and / or latching connection means are preferably arranged spaced apart in the direction of the longitudinal axis L to the second end of the material needle.

The provision of a receiving chamber for a cartridge in the housing of the injection device has the advantage that the device is compact overall. Cartridges are containers that are formed automatically after the removal of the contents, so that in the cartridge remaining material can be repealed and used up at a later date. Cartridges therefore have the advantage that they can be easily replaced and therefore the application of different materials in a short time is possible. The small amount of material held by a cartridge facilitates the handling of the sprayer and thereby improves the precision of the jet guidance.

The receiving chamber is adapted to the size and shape of the cartridge, wherein the receiving chamber preferably completely receives the cartridge.

Preferably, the receiving chamber is designed for receiving pin-shaped cartridges.

Preferably, in the receiving chamber at least one acting in the direction of the longitudinal axis L pressure seal and / or packing provided, which can be actuated by the cartridge to be used. In this way, the at least one pressure seal or the at least one seal pack is only loaded when a cartridge is inserted. If there is no cartridge in the receiving chamber, the at least one pressure seal or the at least one seal pack is relieved, which increases their overall life.

The packing preferably consists of three rings, in particular a support ring, a main ring and an O-ring. With the support ring, the seal pack is supported in the direction of the longitudinal axis L on a surface or an element of the spray device. The main ring is responsible for the actual sealing function against the material needle. For this purpose, the main ring preferably has at least one sealing lip which bears against the material needle. The O-ring enables the sealing function with respect to the receiving chamber.

The main ring, in particular the sealing lip of the main ring, preferably has a circumferential chamfer on a side facing an inserted cartridge. The cartridge is pressed against this chamfer when inserting. As a result, on the one hand, the seal pack is compressed, since the support ring is supported as described above. On the other hand, the sealing lip is pressed against the material needle. In this way, the sealing lip seals the area around the material needle.

The packing, in particular the support ring, or the pressure seal are preferably based on a second spring device. When inserting the cartridge, the cartridge is pressed against the packing or pressure seal and actuates the packing or the pressure seal. The spring device is compressed and biased in this way. By choosing the spring properties, in particular the spring constant, the force applied to the packing or pressure seal can be influenced.

Preferably, the receiving chamber is in communication with the compressed air port. The compressed air connection supplies the round jet air nozzle and the flat jet air nozzles of the spray head, if present, with compressed air. According to the invention, the receiving chamber is in communication with the compressed air connection.

From the compressed air connection can lead according to one embodiment, a compressed air channel to the receiving chamber. According to another embodiment, it is preferred that the compressed air connection opens into the receiving chamber. In this case, it is preferable that a compressed air channel leads from the receiving chamber to the spray head.

In all cases, the receiving chamber and the spray head are preferably supplied via a common compressed air connection with compressed air.

The fact that the receiving chamber is preferably in communication with the compressed air connection, the cartridge for discharging the liquid material can be operated with compressed air.

It can therefore cartridges are used, which have inside the cartridge a sliding piston for discharging the liquid material, which is acted upon from the outside with compressed air. This has the advantage that the cartridge after the Insertion into the receiving chamber does not have to be additionally connected to pressure medium or pressure devices. Insertion and replacement are simplified and faster by using cartridges compared to traditional material containers. Since the use of cartridges also residual quantities can be processed, material is saved.

Preferably, the receiving chamber is arranged in front of the material needle. This means that the spray head, the material needle and the receiving chamber are arranged one behind the other. It is created a compact injection device while maintaining the rod-shaped housing. Preferably, the spray head, the material needle and the receiving chamber lie on a common longitudinal axis.

Preferably, the material needle is provided with a material channel hollow needle, wherein the material needle has at the second end an inlet opening for the inlet of the liquid material. It is advantageous if the second end of the material needle protrudes into the receiving chamber, because it is thereby possible that the material needle can interact with the cartridge in a simple manner.

The cartridge, which preferably has a cartridge container and a cartridge head mounted thereon, has an outlet opening in the cartridge head, which is preferably closed by means of a valve element prestressed by a spring. Preferably, the second end of the material needle engages in the outlet opening of the cartridge head. When the cartridge is inserted into the receiving chamber, the second end of the fluid needle contacts the outlet port in the cartridge head of the cartridge. The valve of the cartridge can be opened when inserting the cartridge through the material needle or later, when the material needle is moved in the axial direction.

Alternatively or additionally, the cartridge may be provided with a closure device. The closure device may be removed by the user prior to inserting the cartridge. In addition, the cartridge with the closure device can be closed again when the cartridge is removed from the sprayer.

When the valve element is in the open position, the liquid material from the cartridge can penetrate directly into the material channel of the material needle.

When a cartridge is replaced, the cartridge is removed from the receiving chamber, whereby the second end of the needle material leaves the outlet opening of the cartridge head of the cartridge. The outlet opening is automatically closed by the valve element due to the action of the spring means.

According to a particular embodiment, the material needle at the inlet opening of the material channel has an actuating means adapted to the outlet opening of the cartridge. Such an actuating means engages in the outlet opening of the cartridge and pushes back the valve element arranged there. As actuating means, at least one projection which is preferably attached to the end-side end face of the material needle is suitable. Preferably, more than two projections are arranged on a circle around the inlet opening.

Preferably, the receiving chamber is divided into a smaller diameter connecting chamber and a larger diameter container chamber, wherein both chambers merge into each other. The smaller diameter port chamber facilitates insertion and centering of the cartridge head and thus coupling of the cartridge head to the second end of the fluid needle. The larger diameter container chamber is adapted to the dimensions of the cartridge container. Preferably, the cartridge container is arranged at least in a over the entire length of the container chamber extending portion spaced from the wall of the container chamber, so that a compressed air channel is formed.

The rotary and / or latching connection means are preferably arranged in the connection chamber.

In the receiving chamber, at least one first guide means is preferably arranged, which is designed such that, when the cartridge is inserted, it cooperates with a second guide means on the cartridge.

The centering and positioning of the cartridge are facilitated by the first and second guide means.

The receiving chamber is preferably closed by means of a closure element, in particular by means of a closure cap.

In order that the sliding piston of the cartridge can be supplied with compressed air, the bottom of the cartridge on the outside, e.g. Having radial channels to direct compressed air from the area between the cartridge container and the wall of the receiving chamber to the sliding piston.

If the cartridge should not have such radial channels, it is useful if the bottom of the closure element has on its inside such radial channels.

Of course, it is also possible that both the cartridge and the closure element have such radial channels.

The channels may preferably be formed as grooves.

It is also possible that the bottom of the cartridge is open, so that the cartridge container is designed at the end opposite the cartridge head as an open tube in which the sliding piston sits. The incoming compressed air acts directly on the sliding piston and pushes it in the direction of the cartridge head.

Preferably, the actuating device for moving the material needle is arranged on or adjacent to the spray head. This means that the actuating device is arranged in the front third, preferably in the front quarter of the housing.

Preferably, the actuating device has a pivotally mounted trigger lever. The arrangement in the front region of the spray device has the advantage that the trigger and thus the actuator can be conveniently operated with the index finger when the sprayer is held like a writing instrument by hand.

The trigger preferably comprises a handle with two legs, each leg having a cam surface. The two legs are arranged on a pivot axis which extends perpendicular to the longitudinal axis L of the spray device. The cam surfaces of the two legs are directed to the rear end of the spray device and are shaped such that upon pivoting of the trigger lever, a force in the direction of the longitudinal axis L can be exerted on a counterpart, which is connected to the material needle. The length and shape of the cam surfaces define the dosage of the liquid material dispensed from the sprayer.

This counterpart is preferably a control axis, which is a part of the actuator.

The adjusting axis preferably extends perpendicularly to the longitudinal axis L through the housing and is arranged to be displaceable in the direction of the longitudinal axis L.

Preferably, the adjusting axis abuts with its two ends on the cam surfaces of the legs. The adjusting axle may additionally be provided with two rollers which roll on the cam surfaces of the two legs when the trigger is actuated.

The adjusting axis can act directly on the material needle to move it in the direction of the longitudinal axis. It is preferred that the adjusting axle acts indirectly on the material needle. The interposition of one or more further components has the advantage that not only the power transmission to the material needle and the movement of the material needle can be additionally influenced, but that by means of the adjusting axis and the compressed air can be switched on and off or controlled.

To realize this, it is provided according to an embodiment that the actuating device has a sliding sleeve, on which the adjusting axle engages, wherein the sliding sleeve is arranged displaceably on the material needle.

Preferably, the sliding sleeve on a valve element which cooperates with an air passage opening in a compressed air channel for opening and closing the air passage opening. Preferably, an end portion of the sliding sleeve forms the valve element.

The air passage opening is preferably located in a compressed air channel, which connects the compressed air connection with the spray head or the receiving chamber with the spray head.

By means of the sliding sleeve thus the compressed air to the spray head can be switched on or off. Since the sliding sleeve is displaceable relative to the material needle, the compressed air can also be switched on independently of the position of the material needle.

Preferably, the sliding sleeve is held in a closed position by means of a first spring device. By means of the adjusting axis, the sliding sleeve can be brought into open position by actuation of the trigger lever, whereby the compressed air is switched on.

In order to use the movement of the sliding sleeve for the displacement of the material needle, the material needle is preferably provided with a first projection on which the sliding sleeve engages.

This projection is preferably formed as a collar on the material needle.

Preferably, the sliding sleeve and the first projection of the material needle in the closed position the sliding sleeve spaced from each other. In the closed position of the sliding sleeve, the material needle is preferably also in its closed position. If the sliding sleeve and the projection of the material needle are spaced, the compressed air can be released by moving the sliding sleeve first and delayed in a further displacement of the sliding sleeve, the material needle to be moved from its closed position to be able to discharge the material. This has the advantage that an uncontrolled dripping of the liquid material from the material nozzle is avoided.

Preferably, a second spring device, in particular a compression spring, is provided in the housing. This second spring device is preferably supported, on the one hand, on the pressure seal or the seal packing, in particular on the support ring, and on the other hand on the projection of the material needle. In this way, upon insertion of the cartridge, a force is exerted on the packing, which transfers to the second spring means. The second spring device in turn causes a force on the material needle in the direction of the longitudinal axis L, whereby the material needle is moved in the direction of the material outlet opening and closes it. This movement is reversed when used as intended by operating the trigger.

The adjusting axle can also indirectly act on the sliding sleeve. For this purpose, the actuating device on a cartridge tube, on which the adjusting axis engages, wherein the cartridge tube is slidably disposed within the housing in the direction of the longitudinal axis. Characterized in that the cartridge tube is preferably arranged rotatably about the sliding sleeve, the assembly of the adjusting axis is simplified.

In order to transmit the movement of the cartridge tube to the sliding sleeve, the sliding sleeve preferably has a second projection on which the cartridge tube engages. Also, this projection may preferably be formed as a collar on the sliding sleeve.

In order to seal the cartridge tube relative to the housing or a nozzle cartridge arranged in the housing, at least one sealing means is provided. Preferably, two sealing means in the form of O-rings are provided, which are arranged in the end regions of the cartridge tube. As sealing means also sealing elements produced integrally with the cartridge tube can be provided.

In all embodiments, the material needle is moved in the longitudinal direction L, preferably against the force of a spring device by means of the trigger lever, whereby the material outlet opening is released in the spray head and the discharged amount of material can be metered.

Preferably, in the housing, a metering ring is arranged rotatably about the longitudinal axis L, which has a cam surface which limits the travel of the adjusting axis. This can be preset manually the maximum amount that is discharged through the material outlet nozzle.

In order to be able to dose the amount of material as accurately as possible, the material needle preferably has a tip at the first end, which protrudes into the material outlet opening and cooperates with the material outlet opening.

Preferably, the material channel branches in front of the tip in at least two outlet channels.

In one embodiment, the following is provided:
The cartridge head has a first head portion and a second head portion in which there is a valve element which closes the outlet opening. The valve element is preloaded with a spring. When the cartridge is inserted, the actuating means on the second end of the fluid needle push on the valve element, so that it moves into the interior of the cartridge and the outlet opening of the cartridge is released.

In one embodiment, the following is provided:
The pressure chamber is located in a sealing plug, which is inserted at the rear end of the cartridge container of the cartridge. The sealing plug has a smaller-diameter first section, which bears against the sliding piston, and a second section of larger diameter. As a result, an inner space is formed, which forms the pressure chamber. At the edge of the first section there are radial channels in the form of grooves through which compressed air can be introduced into the pressure chamber.

The system according to the invention for applying liquid materials to surfaces comprises a spraying device according to the invention and a cartridge inserted into the receiving chamber of the spraying device.

Exemplary embodiments will be explained in more detail below with reference to the drawings.

Show it:

1 a perspective view of a spray device,

2 a longitudinal section through the in 1 shown spraying device,

3 the detail A, partly in section, the 2 .

4 the detail B, partly in section, the 2 .

5 a longitudinal section through the front part of in 1 shown injection device with cartridge inserted and a first position of the material needle and sliding sleeve,

6 a longitudinal section through the front part of in 1 shown injection device with inserted cartridge and a second position of the material needle and sliding sleeve,

7 a cross section along the line AA through the in 1 shown spraying device, but without inserted cartridge,

8th an enlarged view partly in section of the front part of in 1 shown spray device, and

9 a detailed perspective view of the actuator of in 1 shown sprayer.

In the 1 is a sprayer 10 shown in perspective. The sprayer 10 has a rod-shaped housing 30 on, which is in a first housing section 32a and a second housing portion 32b divided by means of a transition section 32c connected to each other. These housing sections 32a and 32b are substantially cylindrical and have a common longitudinal axis L.

At the first housing section 32a is a spray head 20 and an actuator 60 for actuating one inside the housing 30 arranged material needle 90 arranged (see also 8th and 9 ).

The spray head 20 has a mounting ring 21 on, on the case 30 is attached by means of a bayonet lock. At the fastening ring 21 is a cone-shaped section 26 arranged in which the material outlet opening 22 with an annular gap 23 as well as horns 24a Are provided on a circle around the material outlet opening 22 are arranged.

These horns 24a -D can be used as an assembly aid for screwing and unscrewing the mounting ring 21 be educated.

To the actuating device 60 include a trigger 62 with handle 64 and two thighs 66a and 66b , The two thighs 66a , B are arranged parallel to each other and engage around with the handle 64 the fastening ring 21 of the spray head 20 , The trigger 62 is about a pivot axis 68 perpendicular to the longitudinal axis L of the spray device through the housing 30 extends, pivotally mounted. The two thighs 66a , b show curve surfaces 67 on, each one on a roll 72 abut, which on a control axis 70 are rotatably mounted. The adjusting axle 70 extends through the housing portion 32a perpendicular to the longitudinal axis L of the spray device 10 and will end at their two Stellachsenenden 71a , b (see also 9 ) on both sides of the housing section 32a in each case a slot 38 guided, which extends parallel to the longitudinal axis L.

In the in 1 shown position is the trigger 62 in its resting position, in the material needle 90 inside the case 30 is in its closed position in which the material outlet opening 22 of the spray head 20 is closed (see also 2 ).

To move the material needle 90 and thus to open the material outlet opening 22 can the trigger 62 down in the direction of the arrow. The two thighs 66a and 66b be around the pivot axis 68 also pivoted down, with the rollers 72 on the curved surfaces 67 unwind and at the same time the positioning axis 70 move in the direction of the longitudinal axis L. In conjunction with the following figures, the actuating device 60 described in detail.

The housing 30 is ergonomically designed to be held with one hand. In the housing wall 31 of the housing 30 are recessed grips 34 and a handle protrusion 36 provided, which lies when detecting the sprayer with his hand between the thumb and forefinger. Of the recessed grips is the recessed grip 34 to see the thumb of the right hand

This ergonomic design of the housing 30 allows gripping and guiding the sprayer 10 similar to a writing instrument, wherein by means of the index finger of the trigger 62 can be operated. Because the sprayer 10 how a pen can be grasped and guided, can from the material outlet opening 22 Exiting material beam over small surfaces to be coated are performed with great accuracy.

In the lower area of the first housing section 32a of the housing 30 is a compressed air connection 40 shown with the sprayer 10 to a compressed air generating device can be connected (not shown). There is also a locking screw 78 to see, which is also part of the actuator 60 is (see also 9 ).

In the 2 is a cut through the in 1 shown sprayer 10 with inserted cartridge 130 shown. 2 shows the closed position of the spray device 10 , The spray head 20 includes within the mounting ring 21 a material nozzle 25a and an air nozzle 25b , The material nozzle 25a protrudes with its material outlet opening 22 into an opening of the air nozzle 25b , wherein the annular gap 23 is formed, through which the omnidirectional air can escape (see also 6 ).

To protect the material needle 90 are at the air nozzle 25b two protective projections 27 intended. The protective projections 27 are between the material outlet opening 22 and the horns 24a -D arranged. The protective projections 27 are provided in the form of partial rings. They are symmetrical about the material outlet opening 22 arranged around. The protective projections 27 extend in the direction of the longitudinal axis L.

Inside the case 30 there is a receiving chamber 120 , in front of the material needle 90 is arranged. This recording room 120 serves to accommodate the cartridge 130 with cartridge head 132 and cartridge container 139 (see also 5 and 6 ), whereby this receiving chamber 120 in a connection chamber 122 and a container chamber 124 divided. The material needle 90 sticks out with her second end 92b in an outlet opening 134 the connection chamber 122 , The reception chamber 120 for the cartridge is with a closure element 50 closed in the form of a cap.

In the 2 is also the second housing section 32b the in 1 shown sprayer 10 shown. The cartouche 130 is fully illustrated and located in the receiving chamber 120 that the connection chamber 122 and the container chamber 124 includes. At the rear end is the receiving chamber 120 by means of the cap 50 closed on the housing section 32b is screwed on. At the bottom of the housing section 32a is the compressed air connection 40 shown in the receiving chamber 120 opens, causing compressed air in the interior of the receiving chamber 120 can be initiated.

The air flow marked by P ₁ coming through the compressed air connection 40 enters, branches in the interior of the receiving chamber 120 in the air flow P ₂ and in the air flow P ₄ . The air flow P ₄ flows in the direction of the spray head 20 and occurs in the compressed air channel, not shown here 42 one, the receiving chamber 120 with the spray head 20 connects (see 8th ).

Because of the cartridge case 139 the cartouche 130 spaced from the housing wall 31 of the second housing section 32b is arranged, becomes an annular channel 44 formed, which serves as a compressed air channel for the compressed air flow P ₂ . This makes it possible to compressed air from the compressed air connection 40 to the rear end of the cartridge 130 to lead. The bottom of the cartridge container 139 is open. In the cartridge container 139 is a sliding piston 162 arranged. Between the sliding piston 162 and the cap 50 there is a pressure chamber 164 into which the compressed air flows. The compressed air in the pressure chamber 164 causes a displacement of the sliding piston 162 along the longitudinal axis L in the direction of the arrow, so that in the interior of the cartridge 130 located material in the direction of the outlet opening 134 in the cartouche head 132 is pressed. Alternatively, in the cartridge bottom and / or in the bottom 54 the cap 50 be arranged radial channels, so that the compressed air into a pressure chamber 164 in front of the sliding piston 162 the cartouche 130 can be initiated.

The compressed air connection 40 flows into the receiving chamber 120 ,

The material needle 90 owns at the second end 92b an entrance opening 93 ,

The 3 and 4 show the details A and B of the 2 , In 3 is the second end 92b the material needle 90 shown. To the second end 92b is a seal pack 126 arranged. The seal pack 126 has three elements: a support ring 170 , a main ring 172 and an O-ring 174 , He has a sealing lip 176 on, at the material needle 90 is applied. The sealing lip 176 is with a chamfer 178 Mistake. The support ring 170 rests against the nozzle cartridge 110 at a second projection 115 from. Will a cartouche 130 in the sprayer 10 used, sits the cartridge head 132 to the chamfer 178 , On the one hand, this makes the sealing lip 176 to the material needle 90 pressed. On the other hand, the seal pack 126 compressed, which increases the sealing effect.

4 shows the connection of the cartridge 130 with the sprayer 10 , The cartouche 130 indicates the cartridge head 132 an intermediate section 133 on, on which an external thread 135 is provided. The nozzle partron 110 points to a mounting portion 121 a corresponding internal thread 125 on. For inserting the cartridge 130 this is by means of the rotary connection means of internal thread 125 and external thread 135 in the sprayer 10 releasably fixed.

In the 5 is a longitudinal section through the first housing section 32a the in 1 shown sprayer 10 with inserted cartridge 130 shown. 5 shows an intermediate position of the spray device 10 , The first housing section 32a carries the spray head 20 which is on the housing section 32a is screwed on.

The material outlet opening 22 It has a conical inner surface with a conical tip 96 at a first end 92a the material needle 90 interacts. By moving the material needle 90 becomes the material outlet opening 22 opened or closed. The through the material outlet opening 22 escaping material jet is indicated by P ₃ (see 6 ).

The material nozzle 25a lies with a first contact surface 180 on a second contact surface 182 the air nozzle 25b , Both the first contact surface 180 as well as the second contact surface 182 are formed as annular partial surfaces of the curved surface of a spherical cap. In other embodiments, the contact surfaces may also be formed as partial surfaces of a cone surface. In this way, material nozzle 25a and air nozzle 25b centered on each other.

Inside the case 30 is in front of the spray head 20 a nozzle cartridge 110 arranged in the material nozzle 25a is inserted and in which the material needle 90 is slidably mounted. The housing 30 has a locking projection 111 for locking the nozzle cartridge 110 in the case 30 on (see also 4 ). The locking projection 111 is in cross-section transverse to the longitudinal axis L of a circle segment, wherein the associated circle has a bore in the housing 30 is. The bore is thus in the region of the locking projection 111 reduced by a circle segment. On the surface of the locking projection 111 (in cross-section the chord) is a first Arretiterfläche 39 , The nozzle cartridge 110 has a corresponding shape and a corresponding second locking surface 119 on, at the first locking surface 39 lies. Between the nozzle cartridge 110 and the material needle 90 is a cartridge tube 80 with the adjusting axis 70 and a sliding sleeve 84 arranged. The material needle 90 has a first end 92a which is designed as a tip and within the material nozzle 25a is arranged. The second end 92b the material needle 90 protrudes into the cartouche 130 into it.

The material outlet opening 22 is located in the material nozzle 25a coming from the air nozzle 25b is surrounded. At the material outlet opening 22 gets between the material nozzle 25a and the air nozzle 25b the annular gap 23 formed for an annular air nozzle through which the air flow P ₄ emerges to form a circular stream of material. This air flow P ₄ is from the receiving chamber 120 via a compressed air duct 42 (S. 8th ) of the annular air passage opening 28 between the material nozzle 25a and the material needle 90 and then via a ring channel 29 the annular gap 23 fed. If the horns 24a -D are designed as fan jet nozzles, can from the annular channel 29 branch off corresponding air connection channels (not shown).

Inside the first housing section 32a is the nozzle cartridge 110 arranged, consisting essentially of a first pipe section 113a and a second pipe section 113b consists. Within this first pipe section 113a is the material needle 90 Slidably mounted in the axial direction. Inside the material needle 90 is a material channel 94 arranged so that the material needle is formed as a hollow needle. This material channel 94 branches at the first end 92a in four outlet channels 95a , b, c, d and is at the second end 92b with the entrance opening 93 Mistake. The outlet openings of the outlet channels 95a , b, c, d are in a conical surface 98 that in the top 96 passes.

The material needle 90 has a first lead 99 in the form of a ring collar on a sliding sleeve 84 abuts that at a second end 85b also a second lead 88 in the form of a ring collar. The sliding sleeve 84 is from the cartridge tube 80 surrounded by an annular groove 82 in which the adjusting axis 70 intervenes. Due to the axial displacement of the adjusting axis 70 in the direction of the longitudinal axis L is the cartridge tube 80 and thus also the material needle 90 moved in the longitudinal direction L. The different positions of cartridge tube 80 , Material needle 90 and sliding sleeve 84 be related to the 2 . 5 and 6 described in more detail. The cartridge tube 80 is opposite the nozzle partron 110 and thus with respect to the housing 30 by two sealants 81 sealed in the form of O-rings.

Between the first pipe section 113a and the second pipe section 113b is the second projection 115 arranged. In front of the material needle 90 is located in the housing 30 the receiving chamber 120 for the cartridge 130 ,

The second pipe section 113b forms inside the connection chamber 122 for receiving the cartridge head 132 the cartouche 130 , The second end 92b the material needle 90 protrudes into the connection chamber 122 into and becomes in the representation shown here of the cartridge head 132 added.

Inside the first pipe section 113a are two spring devices 100 and 102 arranged. The second spring device 102 supports the support ring 170 on the one hand and on the ring collar 99 of the material needle 90 from. The first spring device 100 rests on an annular shoulder 118 the nozzle cartridge 110 on the one hand and on the ring collar 88 the sliding sleeve 84 from. The spring devices 100 . 102 cause the waistband 99 or the annular collar 88 in the axial direction in the direction of the material outlet opening 22 be pressed. Only by means of the adjusting axis 70 coming from the trigger 62 can be actuated, the sliding sleeve 84 and the material needle 90 be moved in the opposite direction.

The sliding sleeve 84 indicates at its first end 85a a ring portion which serves as a valve element 86 serves and with the air passage opening 28 in the component material nozzle 25a interacts.

In the 6 are both the material needle 90 as well as the sliding sleeve 84 by means of the cartridge tube 80 and the adjustment axis 70 shifted to the right, so that the material outlet opening 22 and the air passage opening 28 are open (open position). Both material and the compressed air can escape from the openings 22 and 23 in the spray head 20 escape.

In the 2 is the positioning axis 70 in its initial position, in which no pressure on the sliding sleeve 84 and the material needle 90 is exercised. Both the top 96 the material needle 90 as well as the sliding sleeve 84 are in closed position, so that no material from the material outlet opening 22 as well as no compressed air through the air passage opening 28 can escape. In this position are the two ring collars 88 and 99 spaced apart from each other.

The material can already through the outlet opening 134 in the material channel 94 enter if the cartridge 130 is used and is at the first end 92a the material needle 90 available when the actuator 60 is pressed.

When the actuator 60 is actuated and the positioning axis 70 is moved to the right, first the sliding sleeve 84 against the force of the spring device 100 moved so that the valve element 86 the air outlet opening 28 releases (intermediate position). This is in the 5 shown.

With further shifting of the adjusting axle 70 then becomes the ring collar 99 taken along and the material needle 90 also moved, leading to the position according to the 6 leads.

In 7 is the section AA the 2 shown, but with the cartridge 130 not shown. You can see the case 30 in which the nozzle cartridge 110 is arranged. The first locking surface 39 of the housing 30 and the second locking surface 119 the nozzle cartridge 110 lie together. The nozzle cartridge 110 has two compressed air channels 42 on which the compressed air in the direction of the spray head 20 conduct. At the attachment section 121 the nozzle cartridge 110 is the internal thread 125 provided on which the cartridge 130 by means of its external thread 135 is attached.

In the second pipe section 113b the seal pack sits 126 , of which only the main ring 172 with his sealing lip 176 and the O-ring 174 are visible. In the main ring 172 sits the material needle 90 and is run there. You can also see the exit channels 95a , b, c, d.

The 7 also shows the pivot axis 68 and the adjusting axis 70 as well as the thighs 66a , b, who adhere to the roles 72 lay.

In the 8th is another sectional view of the in 1 shown sprayer 10 to see in the the air duct 42 is shown extending from the receiving chamber 120 in the direction of the spray head 120 extends. At the intermediate section 133 the cartouche 130 is the external thread 135 intended. The external thread 135 corresponds to the internal thread 125 the nozzle cartridge 110 , That way, the cartridge can 130 detachable in the spray device 10 be attached.

In the 9 is the actuator 60 shown in detail and in perspective. The actuating device 60 with the trigger 62 , Handle 64 , Thighs 66a , b and curve surface 67 has already been linked to the 1 explained. The 9 also shows the inside of the case 30 arranged metering ring 74 (see also 5 ) which is rotatably disposed about the longitudinal axis L and a cam surface 76 has, which at the adjusting axis 70 attacks. By turning the dosing ring 74 can the maximum stroke of the control axis 70 be determined. For fixing the position of the dosing ring 74 is the locking screw 78 intended.

LIST OF REFERENCE NUMBERS

10

sprayer

20

spray head

21

fixing ring

22

Material outlet opening

23

annular gap

24a-d

horns

25a

fluid nozzle

25b

air nozzle

26

cone-shaped section

27

protection lead

28

Air passage opening

29

annular channel

30

casing

31

housing wall

32a

first housing section

32b

second housing section

32c

Transition section

34

grip

36

handle projection

38

Long hole

39

first locking surface

40

Compressed air connection

42

Compressed air duct

44

annular channel

50

Closing element, cap

54

ground

60

actuator

62

sear

64

grip

66a, b

leg

67

cam surface

68

swivel axis

70

adjusting axis

71a, b

Adjusting axle end

72

role

74

Dosage

76

cam surface

78

locking screw

80

cartridges pipe

81

sealant

82

ring groove

84

sliding sleeve

85a

first end of the sliding sleeve

85b

second end of the sliding sleeve

86

valve element

88

second projection, ring collar

90

material needle

92a

first end of the material needle

92b

second end of the material needle

93

inlet opening

94

material channel

95a, b, c, d

 outlet channel

96

top

98

conical surface

99

first lead, ring collar

100

first spring device

102

second spring device

110

A nozzle cartridge

111

locking projection

113a

first pipe section

113b

second pipe section

115

second lead

118

annular shoulder

119

second locking surface

120

Receiving chamber for the cartridge

121

attachment section

122

terminal chamber

124

container chamber

125

inner thread

126

packing

130

cartridge

132

cartridge head

133

intermediate section

134

outlet

135

external thread

139

cartridge container

162

sliding piston

164

pressure chamber

170

support ring

172

main ring

174

O-ring

176

sealing lip

178

chamfer

180

first contact surface

182

second contact surface

L

longitudinal axis

P ₁

first airflow

P ₂

second airflow

P ₃

material jet

P ₄

third airflow

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4213826 A1 [0004]
• WO 2010/126814 A1 [0005]
• WO 2013/072500 A1 [0007]
• GB 2041247 A [0008]
• US 3554450A [0009]

Claims (24)

Spray device for applying liquid materials to surfaces with - a spray head ( 20 ) with a material nozzle ( 25a ), which has a material outlet opening ( 22 ), - a longitudinal axis L having, rod-shaped housing ( 30 ), in which the spray head ( 10 ) and a compressed air connection ( 40 ) for the supply of the spray head ( 20 ) are arranged with compressed air, - with a in the housing in the direction of the longitudinal axis L slidable material needle ( 90 ), which is a first end ( 92a ) and a second end ( 92b ), wherein the first end ( 92a ) with the material nozzle ( 25a ) for opening and closing the material outlet opening ( 22 ) and with - a manual control device ( 60 ) for moving the material needle ( 90 ), characterized in that in the housing ( 30 ) a receiving chamber for a liquid material containing cartridge ( 130 ) and that the receiving chamber ( 120 ) Rotary and / or latching connection means for releasably securing the cartridge ( 130 ) having. Spray device according to claim 1, characterized in that in the receiving chamber ( 120 ) at least one acting in the direction of the longitudinal axis L pressure seal and / or packing ( 126 ), which depends on the cartridge ( 130 ) is operable, is arranged. Spray device according to claim 1 or 2, characterized in that the rotary and / or latching connection means an internal thread ( 125 ). Spray device according to one of claims 1 or 2, characterized in that the rotary and / or latching connection means comprise a bayonet connection. Spray device according to one of claims 1 to 4, characterized in that the material needle ( 90 ) with the second end ( 92b ) in the receiving chamber ( 120 ) protrudes. Spray device according to one of claims 1 to 5, characterized in that the rotational and / or latching connection means spaced in the direction of the longitudinal axis L to the second end ( 92b ) of the material needle ( 90 ) are arranged. Spray device according to one of claims 1 to 6, characterized in that the receiving chamber ( 120 ) in a smaller diameter connection chamber ( 122 ) and a larger diameter container chamber ( 124 ) is divided. Spray device according to one of claims 1 to 7, characterized in that the rotary and / or latching connection means in the connection chamber ( 122 ) are arranged. Spray device according to one of claims 1 to 8, characterized in that the actuating device ( 60 ) on or adjacent to the spray head ( 20 ) is arranged. Spray device according to one of claims 1 to 9, characterized in that the actuating device ( 60 ) a pivotally mounted trigger lever ( 62 ) having. Spray device according to claim 10, characterized in that the trigger ( 62 ) a handle ( 64 ) with two legs ( 66a . 66b ), each leg ( 66a . 66b ) a curved surface ( 67 ) having. Spray device according to one of claims 1 to 11, characterized in that the actuating device ( 60 ) an adjusting axis ( 70 ), which extends perpendicular to the longitudinal axis L through the housing and is slidably disposed in the direction of the longitudinal axis L. Spray device according to one of claims 1 to 12, characterized in that the adjusting axis ( 70 ) with both ends ( 71a . 71b ) on the cam surfaces ( 67 ) of the thighs ( 66a . 66b ) is present. Spray device according to one of claims 1 to 13, characterized in that the actuating device ( 60 ) a sliding sleeve ( 84 ), on which the adjusting axis ( 70 ), wherein the sliding sleeve ( 84 ) on the material needle ( 90 ) is arranged displaceably. Spray device according to claim 14, characterized in that the sliding sleeve ( 84 ) a valve element ( 86 ), which with an air passage opening ( 44 ) in the compressed air channel ( 42 ) for opening and closing the air passage opening ( 44 ) cooperates. Spray device according to one of claims 14 or 15, characterized in that an end portion of the sliding sleeve ( 84 ) the valve element ( 86 ). Spray device according to one of claims 14 to 16, characterized in that the sliding sleeve ( 84 ) by means of a first spring device ( 100 ) is held in a closed position. Spray device according to one of claims 14 to 17, characterized in that the Material needle ( 90 ) a first lead ( 99 ), on which the sliding sleeve ( 84 ) attacks. Spray device according to claim 18, characterized in that the sliding sleeve ( 84 ) and the first lead ( 99 ) of the material needle ( 90 ) in the closed position of the sliding sleeve ( 84 ) are arranged spaced from each other. Spray device according to one of claims 18 or 19, characterized in that a second spring device ( 102 ) provided on the one hand at the first projection ( 99 ) and on the other hand on the packing ( 126 ) and / or the pressure seal is supported. Spray device according to one of claims 14 to 20, characterized in that the adjusting axis ( 70 ) by means of a cartridge tube ( 80 ) on the sliding sleeve ( 84 ), wherein the cartridge tube within the housing ( 30 ) is slidably disposed in the direction of the longitudinal axis (L). Spray device according to one of claims 14 to 21, characterized in that the sliding sleeve ( 84 ) a second projection ( 88 ), at which the cartridge tube ( 80 ) attacks. Spray device according to one of claims 1 to 22, characterized in that in the housing ( 30 ) a metering ring ( 74 ) is arranged rotatably about the longitudinal axis L, wherein the metering ring ( 74 ) a curved surface ( 76 ), which the travel of the adjusting axis ( 70 ) limited. System for applying liquid materials to surfaces with a spraying device ( 10 ) according to one of claims 1 to 23 and with a in the receiving chamber ( 120 ) inserted cartridge ( 130 ).

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