WO2024056247A1

WO2024056247A1 - Material-amount regulating device for limiting the material-needle stroke of a spray gun, spray gun having a material-amount regulating device, and method for applying coating material

Info

Publication number: WO2024056247A1
Application number: PCT/EP2023/070183
Authority: WO
Inventors: Alexander Tschan
Original assignee: Sata Gmbh & Co. Kg
Priority date: 2022-09-12
Filing date: 2023-07-20
Publication date: 2024-03-21
Also published as: DE102022123186A1

Abstract

The invention relates to a material-amount regulating device (1) for limiting the material-needle stroke of a hand-held spray gun (3), comprising: a front end (4) having a holding means (5), in particular in the form of a thread (14), by means of which the material-amount regulating device (1) can be fastened to a spray gun (3); a rear end (6), which is opposite the front end (4); a stop surface (7) for limiting the material-needle stroke (2); an adjustment means (8), in particular formed by part of the holding means (5) in the form of a thread (14), via which adjustment means, in reciprocation with a corresponding counter element (9) of the spray gun (3), an axial position of the stop surface (7) can be axially shifted for limiting the material-needle stroke; a rapid adjustment mechanism (10), by means of which the stop surface (7) can be shifted, relative to the adjustment means (8), back and forth in the axial direction (13), between a stroke-limiting position and a stroke-opening position different from the stroke-limiting position, without changing the axial position of the stop surface (7) adjusted by the adjustment means (8) and without removing the material-amount regulating device (1) from the spray gun (3); wherein the stop surface (7) is arranged, at least in the stroke-limiting position in the axial direction (13), at the height of the holding means (5) or is arranged in the axial direction (13) so as to be offset from the holding means (5) in the direction of the rear end (6) of the material-amount limiting device (1).

Description

Material quantity regulating device for limiting the material needle stroke of a paint gun, paint gun with a material quantity regulating device and method for applying coating material

The invention relates to a material quantity regulating device for limiting the material needle stroke of a paint spray gun, having a front end with a holding means by means of which the material quantity regulating device can be attached to a paint spray gun, a rear end which is opposite the front end, a stop surface for limiting the material needle stroke, an adjusting means, via which, in interaction with a corresponding counter element of the paint gun, an axial position of the stop surface for limiting the material needle stroke relative to the paint gun can be adjusted, as well as a quick adjustment mechanism, by means of which the stop surface relative to the adjusting means between a stroke limiting position and a stroke opening position that is different from the stroke limiting position in the axial direction can be adjusted back and forth without changing the setting of the adjusting means (8) and without dismantling the material quantity regulating device from the paint gun.

The invention further relates to a paint gun for dispensing a coating material with a material needle and a material quantity regulating device for limiting the material needle stroke, as well as a method for applying coating material using a paint gun.

Material quantity regulating devices are used, for example, in the field of painting technology, whereby these serve to provide, by means of a stop surface, a stop for the end of a material needle which controls the material discharge quantity and is opposite the material discharge direction. As a rule, material quantity regulating devices are attached to the end of the paint gun that is opposite a material nozzle of the paint gun in the material delivery direction. It is usually attached via a hole in the body of the paint gun that has an internal thread. The material quantity regulating device has a corresponding external thread and is screwed into the bore. By changing the screw-in depth of the material quantity regulating device, the Stop of the material quantity regulating device can be shifted back and forth in the axial direction, whereby the maximum material needle stroke of the material needle can be limited more or less.

For some purposes or certain coating materials, it is desirable to limit the amount of material dispensed, for example to achieve a special surface effect. For other purposes, the maximum amount of material must be able to be dispensed. It is an advantage if you can quickly switch back and forth between the two positions. Such a switchable material quantity regulating device is known from JPH4126562.

JPH4126562 describes a material quantity regulating device by means of which it is possible to switch back and forth between a fully open position and a half-open position. In particular, it should be possible for unskilled workers to achieve a high surface quality. This should be achieved by not applying a single layer in the fully open position as usual, but rather by applying several layers with the same layer thickness in the half-open position. Skilled workers should apply multiple coats of the same thickness in the half-open position when dealing with small or rough surfaces. To switch over, the rear end of the material quantity regulating device is pushed forward in the material delivery direction, then turned through 90° and moved backwards again.

Such solutions meet the requirement of quickly switching back and forth between a first position of the stop surface and a second position of the stop surface. However, due to its design, the material quantity regulating device is particularly expansive and cannot be mounted on a conventional paint gun without modifications. The end of the material needle also remains hidden in the gun body of the paint gun when the material quantity regulating device is dismantled, making it difficult to remove.

Based on this prior art, the invention has set itself the task of creating a material needle regulating device with a compact design. Furthermore, it is the object of the invention to provide a paint gun with a corresponding material needle regulating device and a corresponding method for applying coating material with a quickly adjustable material quantity regulating device. A material quantity regulating device can be used in paint guns, which essentially consist of a base body with a pistol grip, a nozzle head, a trigger guard and a material control system with a material needle and a material quantity regulating device for setting the maximum material needle stroke, by means of which the amount of material to be dispensed can be determined. It can also be an automatic paint gun that has no pistol grip or trigger and is operated automatically using a trigger mechanism.

These paint guns can be pressure-atomizing paint guns as well as air-atomizing paint guns. In the case of pressure-atomizing paint guns, the material to be atomized is placed under high pressure and the atomization of the material occurs via interaction with the ambient air when the material emerges at the mouth of the material nozzle under high pressure. In the case of air-atomizing paint guns, an air supply connection is also provided, by means of which a compressed air supply can be connected, compressed air channels for conducting the compressed air, an air control system with an air valve and an air quantity regulating device for adjusting the quantity of compressed air. In the case of an air-atomizing paint gun, the compressed air required for atomization is supplied at the air supply connection, which is arranged on or in the pistol handle. By operating the trigger guard up to a first pressure point, the air valve is opened. When you pull the trigger guard further, the material needle is also pulled out of the material nozzle. The coating agent then flows out of the material nozzle as a result of gravity or a pressure difference and is atomized by the compressed air flowing out there through the air nozzle, which is designed in the form of an annular gap and surrounds the material nozzle, and is transported in the material delivery direction to an object to be coated, on which the material is located settles and forms a coating film.

The nozzle head of such a paint gun has a material-carrying area through which the material to be atomized flows from a coating agent inlet to a material nozzle. A material supply is provided at the coating agent inlet, which can be provided, for example, in the form of a storage container or a supply line from an external material storage. Common storage containers include flow cups, suction cups or side cups. The pressure difference required to convey material arises, for example, from gravity or from a material conveying device that conveys the material to be conveyed puts material under pressure. The material can also be conveyed by negative pressure, which is generated by air flowing past the material nozzle, whereby the material is exposed to a suction effect.

Such paint guns offer the user a variety of setting options. The air flow rate can be adjusted using an air volume control device. Round/wide jet regulation allows the jet shape of the aerosol emerging from the paint gun to be varied. For this purpose, two or more horns with hot air nozzles are provided on the nozzle head, which are diametrically opposed to the material nozzle. The home air nozzles are directed inwards towards the emerging coating material jet. If no air flow emerges from the home air nozzles, the coating material jet can spread evenly laterally in all directions after emerging from the nozzle and forms into a material jet with a round cross-section. If air flows out of the home air nozzles, the coating material jet is formed into a material jet with an elliptical cross-section after it emerges from the material nozzle.

The material quantity regulating device limits one side of the path along which the material needle can be moved along its own axis. On the opposite side, this path is limited by the material nozzle. The further the stop surface of the material quantity regulating device is displaced in the material delivery direction, the more it shortens the distance that the material needle can move when the trigger guard is actuated, thereby limiting the maximum material volume flow. When the trigger guard is not actuated, the material needle is held in the material nozzle by the compression spring, thereby sealing it. When the trigger guard is actuated, the material needle is moved out of the material nozzle and continues to release it.

According to the invention, a material quantity regulating device for limiting the material needle stroke of a preferably hand-held paint spray gun is proposed. The material quantity regulating device has a front end with a holding means, in particular in the form of a thread, by means of which the material quantity regulating device can be fastened to a paint spray gun. A rear end lies opposite the front end. Furthermore, the material quantity regulating device has a stop surface for limiting the material needle stroke, an adjusting means, in particular formed by a part of the holding means designed in the form of a thread, via which it interacts with a corresponding one Counter element of the paint gun an axial position of the stop surface to limit the material needle stroke is axially adjustable relative to the paint gun. Furthermore, the material quantity regulating device has a quick adjustment mechanism, by means of which the stop surface can be adjusted back and forth in the axial direction relative to the adjusting means between a stroke limiting position and a stroke opening position that is different from the stroke limiting position. Here, the setting of the adjusting means or the axial position of the stop surface set by means of the adjusting means is not changed and the material quantity regulating device is not dismantled from the paint gun. The stop surface is arranged at least in the stroke limiting position in the axial direction at the level of the holding means or is arranged offset in the axial direction relative to the holding means in the direction of the rear end of the material quantity regulating device. Without dismantling the material quantity regulating device, it is understood that the material quantity regulating device is not removed from the paint gun, but remains connected to it. Preferably, the stop surface is located closer to the front end of the material quantity regulating device in the stroke limiting position than in the stroke opening position. This design of a material quantity regulating device enables a particularly compact design, which makes handling easier for the user.

The lifting opening position is to be understood as meaning a position of the material quantity regulating device in which the stop surface does not or only marginally restricts the axial movement of the material needle of the paint gun when dispensing coating material. Accordingly, the trigger guard of the paint gun can be actuated up to a position at which said maximum quantity is dispensed. The stroke limiting position is to be understood as meaning a position of the material quantity regulating device in which the stop surface of the material quantity regulating device limits the axial movement of the material needle of the paint gun in such a way that the material needle of the paint gun can only be displaced axially so far against the material delivery direction that a relative to the maximum amount of coating material A reduced amount of coating material can be dispensed in the lifting opening position. Preferably, the amount of coating material that can be dispensed in the stroke limiting position is more than a third, in particular more than half, of the coating material that can be specified in the stroke opening position. Particularly preferably, more than two thirds, preferably more than 80%, of the maximum amount of material can be dispensed in the stroke limiting position. In a further preferred embodiment, the material quantity regulating device has a front end and a rear end opposite the front end, the front end having a holding means and an adjusting means, the adjusting means extending from the front end towards the rear end. Furthermore, a stop surface is provided for limiting the material needle stroke, as well as a quick adjustment mechanism separate from the adjusting means, by means of which the stop surface can be adjusted back and forth in the axial direction relative to the holding means between the stroke limiting position and the stroke opening position, which is different from the stroke limiting position. Here, at least in the stroke limiting position, the stop surface is arranged in the axial direction at the level of the holding means or is arranged offset in the axial direction relative to the holding means in the direction of the rear end of the material quantity regulating device. Since in said design the stop surface is arranged offset to the rear relative to the adjusting means, a particularly compact design can also be achieved, which makes handling easier for the user.

In a particularly preferred embodiment, the stop surface is located at least in the stroke limiting position in the axial direction at the level of the adjusting means or is offset in the axial direction relative to the adjusting means in the direction of the rear end of the material quantity regulating device, preferably arranged closer to the rear end than to the front end of the material quantity regulating device. In addition, the material quantity regulating device can also be arranged in the lifting opening position at the height of the adjusting means or offset from the adjusting means in the direction of the rear end of the material quantity regulating device, preferably closer to the rear end than to the front end of the material quantity regulating device. This configuration has the advantage that the stop surface for the material needle of the paint gun is moved further back, which further shortens the required length of the material quantity regulating device, resulting in an even more compact design. Preferably, the material quantity regulating device is designed in such a way that the material needle of the paint gun protrudes into the material quantity regulating device at least over half the length of the material quantity regulating device, preferably over at least two thirds of the length of the material quantity regulating device, when the trigger guard is pulled off.

Particularly preferably, the material quantity regulating device has a cavity which extends from the front end of the material quantity regulating device towards the rear end of the material quantity regulating device into the interior of the material quantity regulating device extends and is designed to accommodate a material needle of the paint gun. Said cavity increases the space for the material needle of the paint gun within the material quantity regulating device, which results in the design of the material quantity regulating device being further reduced.

Preferably, the material quantity regulating device is designed such that the stop surface in the stroke limiting position is closer to the front end of the material quantity regulating device in the axial direction than in the stroke opening position. Here, the stop surface in the stroke limiting position is preferably positioned within half of the material quantity regulating device, which includes the rear end of the material quantity regulating device. Since the stop surface is located particularly far at the rear end of the material quantity regulating device even in the stroke limiting position, a particularly compact design is possible.

In the case of a further preferred exemplary embodiment, a locking means is provided, by means of which the material quantity regulating device can be locked in the axial direction relative to the paint spray gun in a position set by the adjusting means, the locking means preferably being designed as a lock nut. This reduces the risk of accidental adjustment of the adjustment means.

The material quantity regulating device preferably has an adjusting element, in particular a sleeve-shaped adjusting element, which comprises the adjusting means. Furthermore, a stop element, in particular a sleeve-shaped stop element, is preferably provided, which includes the stop surface. Preferably, the stop element and the adjusting element can be displaced relative to one another in the axial direction. Here, the stop surface and preferably the entire stop element is mounted axially displaceable relative to the adjusting element between the stroke limiting position and the stroke opening position.

Particularly preferably, the stop element is arranged at least partially inside the adjusting element and/or the adjusting element is arranged at least partially inside the stop element. The nested design creates a particularly compact material quantity regulating device, which requires very few parts and provides a large interior space for receiving the material needle of the paint gun. In a further particularly preferred embodiment, the stop element and the adjusting element each have a shoulder which rest against one another in the lifting opening position. The shoulders of the stop element and the adjusting element create a particularly simple maximum stop for the lifting opening position, which does not require any additional parts.

Preferably, the material quantity regulating device is designed in such a way that the adjustment of the stop surface is carried out by means of the quick adjustment mechanism, preferably exclusively, with a movement in the axial direction of the stop surface and/or the adjustment of the stop surface is carried out by means of the adjusting means by a screwing movement about the central axis of the material quantity regulating device. Through the said adjustment movements, the quick adjustment mechanism can be operated particularly easily, with the adjustment means being able to be operated with particular precision.

The quick adjustment mechanism is particularly preferably designed in such a way that it locks itself automatically in the stroke limiting position and/or the stroke opening position. The quick adjustment mechanism is therefore automatically secured against being adjusted back, which improves the functional reliability of the quick adjustment mechanism.

Preferably, the quick adjustment mechanism comprises a securing element which serves to lock the quick adjustment mechanism in the stroke limiting position and/or the stroke opening position, wherein the securing element preferably at least partially surrounds the adjusting element and/or the stop element in the circumferential direction. Said securing element prevents automatic adjustment of the selected stroke opening position or the stroke limiting position.

In a particularly preferred embodiment, the quick adjustment mechanism automatically moves from the stroke limiting position to the stroke opening position by pulling back a securing element. The automatic adjustment from the stroke limiting position to the stroke opening position is preferably carried out by means of a force which acts on the stop element in the axial direction against the front end of the material quantity regulating device and is generated by a spring element. For this purpose, both a spring element within the material quantity regulating device and a spring element within the Paint gun serves, which moves the material needle back into the sealing seat of the material valve when the material valve is open.

In a further particularly preferred exemplary embodiment, the material quantity regulating device has a sleeve-shaped adjusting element and a sleeve-shaped stop element which is arranged in regions within the adjusting element and is coaxially mounted on the inner surface of the sleeve-shaped adjusting element.

In the case of a particularly preferred development, the adjusting element is provided with an external thread, which forms the holding means and the adjusting means. A locking means in the form of a lock nut can be provided on the external thread. The adjusting element can be used to adjust the axial position of the stop surface in the stroke limiting position and the stroke opening position using the thread.

In the case of a further exemplary embodiment, the stop element can be closed at an end opposite the front end of the material quantity regulating device and the stop surface can be formed on the inside of the closed end.

In the case of an advantageous further development of the invention, in an area of the open end of the stop element opposite the closed end, the outer surface of the stop element can be provided with a shoulder which, in the lifting opening position, in which the internal stop element is displaced maximally towards the rear end of the material quantity regulating device , come into contact with a shoulder on the inner surface of the adjusting element and block the movement of the stop element in the axial direction from the front end of the material quantity regulating device towards the rear end of the material quantity regulating device.

In a preferred variant of the invention, the stop element can have a circumferential groove in the area of the closed end and the adjusting element can have holes in the rear area in which balls are mounted so that they can be displaced radially to the axial direction, the position of the holes in a securing position being the same as the position of the circumferential ones Groove is at the same height in the axial direction and the stop element is moved towards the front end within the adjusting element. In the case of a further exemplary embodiment, an additional sleeve-shaped securing element can be provided that surrounds the area of the rear end of the material quantity regulating device in the area of the bores and the circumferential groove. The securing element can have a larger opening inner diameter located at the front in the axial direction and a smaller securing inner diameter located at the rear in the axial direction.

Particularly preferred is an embodiment in which the securing element is mounted on the adjusting element and/or the stop element so that it can move in the axial direction, so that it can be moved back and forth in the axial direction between the securing position and the opening position. In the securing position, the circumferential groove, the bores and the securing inner diameter can be at the same height in the axial direction, whereas in the opening position the circumferential groove, the bores and the opening inner diameter can be at the same height in the axial direction.

In the securing position, the balls can be pressed or engage in the circumferential groove of the stop element, the mobility of the balls, in the radial direction and away from the central axis of the material quantity regulating device, being limited by the smaller securing inner diameter in such a way that they come into engagement with the circumferential groove are held, whereby the axial mobility of the stop element is prevented relative to the material quantity regulating device.

In the opening position, the balls can be deflected so far outwards in the radial direction away from the central axis of the material quantity regulating device due to the larger opening inner diameter that the balls no longer engage in the circumferential groove, whereby the stop element is relative to the adjusting element in the axial direction between the opening position and the safety position can be moved back and forth.

In a particularly preferred exemplary embodiment, a spring element can be provided which exerts a force directed in the axial direction and towards the rear end of the material quantity regulating device from the securing element to the stop element, which automatically moves the stop element backwards in the open position and holds it in this open position. The spring element can exert a force directed in the axial direction and towards the front end of the material quantity regulating device on the securing element, which automatically moves the securing element forward and holds it in the securing position, thereby keeping the balls in engagement with the groove.

By means of the design features mentioned, a material quantity regulating device can be created which is particularly compact in design and particularly easy to operate. Such a material quantity regulating device on an existing paint gun can also be exchanged for a conventionally mounted material quantity regulating device without having to make any changes to the paint gun, and conventional material needles can also be used without adjusting the length of the material needle. This means that no additional parts need to be manufactured, which reduces manufacturing costs.

The invention further relates to a paint gun for dispensing a coating material, in particular a hand-held paint gun, with a material needle and a material quantity regulating device for limiting the material needle stroke with one or more of the aforementioned features, the attachment of the material quantity regulating device preferably directly to the paint gun or via at least one intermediate component he follows. Here, the fastening element by means of which the material quantity regulating device is attached to the paint gun can also be used to adjust the stroke limiting position. For example, the attachment takes place by means of an external thread on the material quantity regulating device and an internal thread, which is provided in a channel of the paint gun surrounding the material needle. If the material quantity regulating device is screwed in or unscrewed using the thread, the position of the stop surface can be adjusted in the axial direction. Such a paint gun with such a material quantity regulating device allows switching back and forth between the stroke limiting position and the stroke opening position particularly quickly and reliably, which makes the operation of the paint gun easier.

In a further preferred embodiment of a paint spray gun, the stop surface in the stroke limiting position limits the maximum axial deflection of the material needle in the direction of the rear end of the material quantity regulating device in such a way that a reduced amount of coating material compared to the stroke opening position can be dispensed. Preferably, the maximum deflection of the material needle is in the axial direction and in the direction of the rear At the end of the material quantity regulating device in the lifting opening position, it is unlimited by the stop surface in such a way that a maximum possible amount of coating material can be dispensed. The delivery of a maximum possible amount of coating material is preferably understood to mean an amount in which the amount of coating material that can be delivered can no longer be reduced or can only be reduced slightly by limiting the material needle stroke. In this context, “minor” is preferably understood to mean a reduction of less than 5% in the maximum amount of material that can be dispensed. Thus, the maximum amount of material that can be dispensed in the stroke opening position is preferably significantly limited by the design of the material nozzle and not by the material needle stroke.

The invention further relates to a method for applying coating material by means of a paint gun, in particular a paint gun with one or more previously described features and / or a material quantity regulating device with one or more of the previously described features. As a rule, a material quantity regulating device is first adjusted in advance by means of an adjusting element into a closed position in which a stop of the material quantity regulating device for a material needle of the paint gun is displaced maximally in the material delivery direction. This state forms a zero point or starting position. The material quantity regulating device can be completely closed in this state. A stop surface of the material quantity regulating device can also completely block the movement of a material needle of the paint gun in the axial direction.

As part of the method according to the invention, the material quantity regulating device is adjusted by means of the adjusting element into a stroke limiting position in which the stop surface allows the material needle to move in the axial direction up to a freely definable intermediate position in which a reduced amount of material can be dispensed. A quick adjustment mechanism of the material quantity regulating device is then actuated, by means of which the stop surface is shifted from the stroke limiting position into a stroke opening position without actuation of the adjusting element, in which the material needle can be opened in the axial direction up to a maximum position and an unreduced or less reduced amount of material can be dispensed . The next step is to apply a layer of coating material to an object to be coated with the maximum possible (unreduced) amount of material released. After applying the lower material layer, the quick adjustment mechanism is actuated, by means of which the stop surface is inserted into the Stroke limiting position is transferred, in which the reduced amount of material can be dispensed. There is no actuation of the adjusting element. The next step is to apply a further layer of coating material with a reduced amount of material released. By said method, a lower layer of material with a greater layer thickness is first applied, whereupon an upper layer of material is applied, which preferably has a smaller layer thickness due to the reduced amount of material. Using such a method, a coating material layer can be applied reproducibly, preferably with two different layer thicknesses, with a particularly high surface quality being able to be achieved by the upper layer with a smaller layer thickness. Various effects also come into their own better with a smaller layer thickness. Unlike applying several identical thin layers of material, work can be done more quickly and there is no risk of the coating material drying before the coating process is complete. Unlike the process described, different coating materials can also be used for both layers. Additional layers with different layer thicknesses can also be applied.

The invention further relates to a method for applying coating material by means of a paint gun, in particular a paint gun with one or more previously described features and / or a material quantity regulating device with one or more of the previously described features. According to the method, the material quantity regulating device is adjusted by means of the adjusting element into a stroke limiting position in which the stop surface allows the material needle to move in the axial direction up to a freely definable intermediate position in which a reduced amount of material can be dispensed. A layer of coating material with a reduced amount of material is then applied. After the coating material layer has been completely applied, a quick adjustment mechanism of the material quantity regulating device is actuated, by means of which the stop surface is shifted from the stroke limiting position into a stroke opening position without actuation of the adjusting element, the material needle in the stroke opening position being able to be opened in the axial direction up to a maximum position and a maximum possible (unreduced) or less reduced amount of material can be delivered. A further layer of coating material is then applied with an unreduced amount of material released. The method described can, for example, be used to achieve a special surface effect. A particularly opaque layer of coating material can also be produced. Exemplary embodiments of the device according to the invention are explained in more detail below using schematic figures. This shows:

1 is a perspective view of a first embodiment of a material quantity regulating device in the stroke limiting position,

2 shows a partial section of the first embodiment of the material quantity regulating device from FIG. 1 in the stroke limiting position,

3 shows a central section of the first embodiment of the material quantity regulating device from FIG. 1 in the stroke limiting position,

4 shows a central section of the first embodiment of the material quantity regulating device from FIG. 1 in the lifting opening position,

5 shows a paint gun with the first embodiment of the material quantity regulating device from FIG. 1 in the stroke opening position,

6 shows a partial section of a paint gun from FIG. 5 with the design of the material quantity regulating device from FIG. 1 in the stroke limiting position with the trigger guard not actuated,

7 shows a partial section of a paint gun from FIG. 5 with the first embodiment of the material quantity regulating device from FIG. 1 in the stroke limiting position with the trigger guard fully activated,

8 shows a partial section of a paint gun from FIG. 5 with the first embodiment of the material quantity regulating device from FIG. 1 in the lifting opening position with the trigger guard fully activated,

9 shows a central section of the paint gun from FIG. 6,

10 shows a central section of a second embodiment of a material quantity regulating device in the stroke limiting position,

11 shows a central section of the second embodiment of a material quantity regulating device in the lifting opening position, 12 shows a central section of a third embodiment of a material quantity regulating device in the stroke limiting position,

13 shows a central section of the third embodiment of a material quantity regulating device in the lifting opening position,

14 shows a central section of a fourth embodiment of a material quantity regulating device in the stroke limiting position,

15 shows a central section of the fourth embodiment of a material quantity regulating device in the lifting opening position,

16 shows a side view of the fourth embodiment of a material quantity regulating device in the lifting opening position,

Figures 1 to 4 show a material quantity regulating device 1 for limiting the material needle stroke of a hand-held paint gun 3, as shown by way of example in Figure 5. The material quantity regulating device 1 has a front end 4 with a holding means 5 in the form of a thread 14, by means of which the material quantity regulating device 1 can be fastened to the paint gun 3 shown in FIG. 5. Also shown is a rear end 6, which lies opposite the front end 4. The material quantity regulating device 1 has a stop surface 7 shown in FIGS. 2 to 4 for limiting the material needle stroke and an adjusting means 8, which is formed by part of the holding means 5 designed in the form of a thread 14.

By means of the adjusting means 8 and in interaction with a corresponding counter element 9 of the paint gun 3, the axial position of the stop surface 7 can be adjusted to limit the material needle stroke. Also shown is a quick adjustment mechanism 10, by means of which the stop surface 7 can be adjusted back and forth in the axial direction 13 relative to the adjusting means 8 between a stroke limiting position and a stroke opening position that is different from the stroke limiting position, without changing the position of the adjusting means 8 and without the material quantity regulating device 1 from the Dismantle the paint gun 3.

In the material quantity regulating device 1 shown, the stop surface 7 is arranged offset in the axial direction 13 relative to the holding means 5 in the direction of the rear end 6 of the material quantity regulating device 1. The stop surface is 7 in Stroke limiting position closer to the front end 4 of the material quantity regulating device 1 than in the stroke opening position.

1 to 4, the adjusting means 8 extends at the front end 4 in the direction of the rear end 6. The stop surface 7 for limiting the material needle stroke is between a stroke limiting position and one of the stroke limiting position by the quick adjustment mechanism 10, which is separate from the adjusting means 8 Different lifting opening positions can be adjusted back and forth in the axial direction 13. By means of the quick adjustment mechanism 10, the stop surface 7 can be adjusted relative to the adjusting means 8, the stop surface 7 being arranged offset in the stroke limiting position in the axial direction 13 relative to the adjusting means 8 in the direction of the rear end 6 of the material quantity regulating device 1.

As the structure of the material quantity regulating device 1 shows, the stop surface 7 is also arranged offset in the stroke limiting position relative to the adjusting means 8 in the direction of the rear end 6 of the material quantity regulating device 1. Accordingly, the stop surface 7 is arranged closer to the rear end 6 than to the front end 4 of the material quantity regulating device 1 both in the stroke limiting position and in the stroke opening position. In an alternative embodiment, the stop surface 7 can also be arranged in the axial direction 13 at the level of the adjusting means 8 when the material quantity regulating device 1 is in the stroke limiting position.

1 to 4, a locking means 17 is provided, by means of which the adjusting means 8 can be locked in a position in the axial direction 13, the locking means 17 being designed as a lock nut 17.

1 to 4 also show a cavity 15 which extends from the front end 4 of the material quantity regulating device 1 towards the rear end 6 of the material quantity regulating device 1 into the interior of the material quantity regulating device 1. From Fig. 6 to 9 it can be seen that the cavity 15 is designed to accommodate a material needle 16 of the paint gun 3.

Also shown is a sleeve-shaped adjusting element 18, which includes the adjusting means 8, and a sleeve-shaped stop element 19, which includes the stop surface 7, wherein the stop element 19 is partially arranged inside the adjusting element 18. Embodiments are also possible in which the adjusting element 18 is at least partially arranged inside the stop element 19.

Fig. 3 shows the material quantity regulating device in the stroke limiting position and Fig. 4 shows the material quantity regulating device in the stroke opening position. From both figures it can be seen that the stop surface 7 in the stroke limiting position in the axial direction 13 is closer to the front end 4 of the material quantity regulating device 1 than in the stroke opening position and the stop surface 7 in the stroke limiting position is positioned within half of the material quantity regulating device 1, which is the rear end 6 of the material quantity regulating device 1 includes.

It is also shown that the stop element 19 and the adjusting element 18 each have a shoulder 27, 29, which rest against one another in the lifting opening position and limit the maximum rearward deflection of the stop element 19 in the lifting opening position. From the structure shown it can be seen that the adjustment of the stop surface 7 by means of the quick adjustment mechanism 10 takes place exclusively with a movement in the axial direction 13 of the stop surface 7. In the case of another embodiment according to the invention, as shown for example in FIGS. 10 and 11, 12 and 13 or 14 and 15, the adjustment of the stop surface 7 by means of the adjusting means 8 can also be carried out by a rotary movement of an actuating element 21 about the central axis of the material quantity regulating device 1 or a combination between such a rotary movement and a previously described movement in the axial direction 13.

As can be seen in particular from FIGS. 3 and 4, the quick adjustment mechanism 10 is designed in such a way that it locks itself automatically in the stroke limiting position and the stroke opening position. For this purpose, the quick adjustment mechanism 10 has a securing element 22, which serves to lock the quick adjustment mechanism 10 in the stroke limiting position and the stroke opening position, the securing element 22 partially surrounding the adjusting element 18 and the stop element 19 in the circumferential direction. The quick adjustment mechanism 10 is designed in such a way that it automatically moves from the stroke limiting position to the stroke opening position by pulling back the securing element 22. For this purpose, a spring element 37 is provided which, in conjunction with a material needle spring 47, exerts a backward force on the stop element 19 and this in the backward direction moves when the quick adjustment mechanism 10 is released via the securing element 22. For this purpose, the securing element 22 is pulled backwards in the stroke limiting position.

3 and 4, the adjusting element 18 is sleeve-shaped, with a sleeve-shaped stop element 19 arranged in areas within the adjusting element 18 and coaxially mounted on the inner surface 30 of the sleeve-shaped adjusting element 18. The adjusting element 18 is provided with an external thread 14, shown in detail in FIGS. 1 and 2, which forms the holding means 5 and the adjusting means 8. A locking means 17 in the form of a lock nut 17 is provided on the external thread 14. The stop element 19 is closed at an end 23 opposite the front end 4 of the material quantity regulating device 1. The stop surface 7 is formed on the inside 24 of the closed end 23. In the area of the open end 25 of the stop element 19 opposite the closed end 23, the outer surface 26 of the stop element 19 is provided with a shoulder 27. In the lifting opening position shown in FIG. 4, this shoulder 27 comes into contact with a shoulder 29 on the inner surface 30 of the adjusting element 18 and blocks the movement of the stop element 19 in the axial direction 13. The internal stop element 19 is in the lifting opening position at its maximum towards the rear end 6 of the material quantity regulating device 1 moved.

The stop element 19 has a circumferential groove 31 in the area of the closed end 23. The adjusting element 18 has bores 32 in the rear area, in which balls 33 are mounted so that they can be displaced radially to the axial direction 13. In a securing position shown in Fig. 3, the position of the bores 32 is at the same height as the position of the circumferential groove 31 in the axial direction 13, the stop element 19 being displaced towards the front end 4 within the adjusting element 18.

Furthermore, a sleeve-shaped securing element 22 is shown that surrounds the area of the rear end 6 of the material quantity regulating device 1 in the area of the bores 32 and the circumferential groove 31. The securing element 22 has a larger opening inner diameter 35 at the front in the axial direction 13 and a smaller securing inner diameter 36 at the rear in the axial direction 13. The securing element 22 is mounted so that it can move in the axial direction 13 relative to the adjusting element 18 and the stop element 19, so that this can be moved back and forth in the axial direction 13 between the securing position shown in FIG. 3 and the opening position shown in FIG. 4.

In the securing position according to FIG. 3, the circumferential groove 31, the bores 32 and the securing inner diameter 36 are at the same height in the axial direction 13. In the opening position from FIG. 4, the circumferential groove 31, the bores 32 and the opening inner diameter 35 are at the same height in the axial direction 13.

3, the balls 33 engage in the circumferential groove 31 of the stop element 19, the mobility of the balls 33, in the radial direction and away from the central axis of the material quantity regulating device 1, being limited by the smaller securing inner diameter 36 in such a way that this be held in engagement with the circumferential groove 31. This prevents the axial mobility of the stop element 19 relative to the adjusting element 18.

In the opening position according to FIG. 4, the balls 33 can be deflected so far outwards in the radial direction from the central axis of the material quantity regulating device 1 by the larger opening inner diameter 35 that the balls 33 no longer engage in the circumferential groove 31. The stop element 19 can thus be moved back and forth relative to the adjusting element 18 in the axial direction 13 between the stroke limiting position and the stroke opening position.

Between the stop element 19 and the securing element 22, the spring element 37 is provided, which exerts a force directed in the axial direction 13 and in the direction of the rear end 6 of the material quantity regulating device 1 on the stop element 19, which automatically moves the stop element 19 backwards from the stroke limiting position into the stroke opening position moves and holds it in this position.

The spring element 37 conversely exerts a force directed in the axial direction 13 and in the direction of the front end 4 of the material quantity regulating device 1 on the securing element 22, which forces the securing element 22 forward in the direction of the securing position. However, the balls 33, which are arranged in the opening inner diameter 35 of the securing element 22, hold the securing element 22 in the open position. In order to transfer the stop surface 7 or the stop element 19 from the stroke opening position shown in FIG. 4 into the stroke limiting position shown in FIG be moved so that the groove 31 is again at the axial height of the balls 33. The balls 33 are now pressed radially inwards into the groove 31. By means of the spring element 37, the unlocked securing element 22 is now moved towards the front end 4 and the quick adjustment mechanism 10 automatically locks itself in the stroke limiting position shown in FIG Internal securing diameter 36 of the securing element 22 is limited.

In order to transfer the stop surface 7 or the stop element 19 from the stroke limiting position shown in FIG. 3 into the stroke opening position shown in FIG the spring force that the spring element 37 exerts on the stop element 19 via the push button 38 increases. As soon as the securing element 22 is moved so far to the rear end 6 of the material quantity regulating device 1 that the opening inner diameter 35 and the balls 33 are at the same axial height, the balls 33 are moved outwards in the axial direction by the spring force, whereby the stop element 19 is released and moves backwards automatically. Via the spring force that the spring element 37 exerts on the push button 38 and thus on the stop element 19, this is held in the lifting opening position, as long as no forward force is exerted on the push button 38 as described above.

Fig. 5 shows an example of a paint gun 3 for dispensing a coating material. The paint gun shown is a hand-held paint gun 3, with a material needle 16 shown in the sectional view of FIG. 9 and a material quantity regulating device 1 for limiting the material needle stroke according to Figures 1 to 4. The material quantity regulating device 1 is attached directly to the paint gun 3, but in an alternative embodiment it can also be done via at least one intermediate component. 6 to 8 show the paint gun 3 in different material delivery states. 6 shows a state with an unopened material needle 16 in which no coating material is dispensed. Figs. 7 and 8 show the state when the trigger guard 45 is fully withdrawn, with the material quantity regulating device 1 in the stroke limiting position in FIG. 7 and in the stroke opening position in FIG. 8.

7 shows that the stop surface 7 in the stroke limiting position limits the maximum axial deflection of the material needle 16 in the direction of the rear end 6 of the material quantity regulating device 1 in such a way that a reduced amount of coating material compared to the stroke opening position can be dispensed. This becomes particularly clear when viewed together with FIG. 8, which shows the material quantity regulating device 1 in the lifting opening position. Here it can be seen that the material needle 16 can be moved further backwards in the stroke opening position, whereby the material nozzle 54 can be opened further and thus a larger amount of coating material can be dispensed, since the opening cross section between the material nozzle 54 and the material needle 16 is larger. Fig. 8 also shows that the maximum deflection of the material needle 16 in the axial direction 13 and in the direction of the rear end 6 of the material quantity regulating device 1 in the stroke opening position is unlimited by the stop surface 7 to the extent that a maximum possible amount of coating material can be dispensed. In another embodiment, the deflection of the material needle 16 can also be limited by the stop surface 7, although the deflection of the material needle 16 is still less limited in the stroke opening position than in the stroke limiting position.

The application of the coating material using a paint gun 3 preferably begins by first moving the material quantity regulating device 1 by means of the adjusting element 18 into a closed position, not shown, in which the material quantity regulating device 1 is completely closed. In this position, the stop surface 7 of the material quantity regulating device 1 completely blocks the movement of the material needle 16 of the paint gun 3 in the axial direction 13 (zero or starting position).

The material quantity regulating device 1 is then adjusted by means of the adjusting element 18 into the stroke limiting position shown, for example, in FIG. 4, in which the stop surface 7 allows the material needle 16 to move in the axial direction 13 up to an intermediate position shown in FIG is deliverable. The quick adjustment mechanism 10 of the material quantity regulating device 1 is then actuated, by means of which the stop surface 7 is shifted from the stroke limiting position into the stroke opening position shown in FIG. 4 without actuation of the adjusting element 18, in which the material needle 16 is, as shown in FIG. can be opened in the axial direction 13 up to a maximum position and an unreduced amount of material can be released.

After the quick adjustment mechanism 10 has been actuated and the material quantity regulating device 1 has been brought into the lifting opening position, a lower layer of coating material with an unreduced amount of material dispensed is now applied to the object to be coated.

The quick adjustment mechanism 10 is then actuated again, whereby the stop surface 7 is transferred back into the stroke limiting position without actuation of the adjusting element 18, with a reduced amount of material now being able to be dispensed.

After the quick adjustment mechanism 10 has been actuated and the material quantity regulating device 1 has been brought into the stroke limiting position, an upper layer of coating material is now applied to the object with a reduced amount of material dispensed.

In the case of an alternative embodiment, the coating material is applied by means of the paint gun 3, by first applying a lower (first) coating material layer with the aid of the material quantity regulating device 1 in the stroke limiting position with a reduced material delivery quantity and then a further layer of coating material on the first coating material layer with the aid of the material quantity regulating device 1 in the stroke opening position maximum possible material delivery quantity is applied.

Fig. 9 shows the paint gun from Fig. 5 to 8 in average section, with the material quantity regulating device 1 being in the stroke limiting position shown in Fig. 3. The paint gun 3 has a coating agent inlet 41, on which a material supply device can be mounted, which supplies the paint gun 3 with coating material. In the paint gun 3 shown, a flow cup can be mounted on the coating agent inlet 41. Also shown is an air valve 42, by means of which the air flow through the paint gun 3 can be controlled. To supply the paint gun 3 with compressed air an air supply connection 43 is provided for this purpose. The paint gun 3 also has a pistol grip 44 on which the paint gun 3 can be held by the user. Furthermore, a trigger guard 45 is provided, by means of which the air valve 42 and the deflection of the material needle 16 and thus the amount of material dispensed are controlled. Also shown is an air quantity regulating device 46, by means of which the amount of compressed air that reaches the air valve 42 from the air supply connection 43 can be adjusted. By means of the material needle spring 47, the material needle 16 is subjected to a spring force in the material delivery direction in order to move it forward again when the trigger guard 45 is released. Also shown is an air nozzle 53, which surrounds the round material nozzle 54, also shown, in the form of an annular gap and atomizes the coating material emerging from the material nozzle 54. Both the material nozzle 54 and the air nozzle 53 are located on the nozzle head 55. On the nozzle head 55 there are also horns 57 which project in the material delivery direction and which carry the hot air nozzles 58. The round/wide jet control 56 can be used to control how much air flows out of the home air nozzles 58 when the trigger guard 45 is activated.

10 to 16 show alternative embodiments of a material quantity regulating device 1 according to the invention. However, many other embodiments are conceivable, which are also considered to be according to the invention.

10 and 11 show a second embodiment of a material quantity regulating device 1. Deviating from the previously described embodiment, the stop element 19 has a quick adjustment mechanism 10, which is formed by a first quick thread 48 and a second quick thread 49. Here, the first quick thread 48 is designed to be longer than the second quick thread 49. If the quick adjustment mechanism is in the stroke limiting position shown in FIG. 10, the stop element 19 is connected to the adjusting element 18 by means of the shorter second quick thread 49. If the quick adjustment mechanism 10 is changed to the lifting opening position, the stop element 19 is unscrewed from the adjusting element 18 by means of the second quick thread 49, whereupon the stop element 19 is screwed onto a thread on the adjusting element 18 with the first quick thread 48. Due to the different lengths of the first quick thread 48 and the second quick thread 49, the stop surface 7 is further away from the front end 4 of the material quantity regulating device 1 in the stroke opening position than in the stroke limiting position. 12 and 13 show a further embodiment of a material quantity regulating device 1, which differs from the previously described embodiments in that the stop element 19 and the adjusting element 18 are connected via a threaded button 50, which carries an external thread 60 at its front end, by means of which the threaded button 50 is connected to the adjusting element 18 in such a way that the threaded button 50 can be displaced forwards or backwards relative to the adjusting element 18 via the thread 60 when rotating about its own axis. The threaded button 50 has an inner bore 61 at its front end, in which the stop element 19 is freely rotatable, but is mounted in a form-fitting manner in the axial direction 13, so that the stop element 19 moves forward and backward with the threaded button 50 relative to the adjusting element 18, when the threaded knob 50 is rotated to the right or left in the circumferential direction. In this way, the stop surface 7 on the stop element 19 can be transferred from a stroke limiting position (FIG. 12) to a stroke opening position (FIG. 13) relative to the adjusting element 18.

14 to 16 show a further embodiment of a material quantity regulating device 1. In this embodiment, part of the stop element 19, as can be seen from FIG. At the front end of the recess offset 52, the triangular cross section merges into a round cross section, the outer diameter of which lies on the corner points of the triangular cross section. The transition between triangular cross section and round cross section forms a recess offset shoulder 59 on the legs of the triangle. Furthermore, an intermediate securing element 22 with a snap hook 51 is provided, which is designed in such a way that it is in the stroke limiting position shown in FIG. 14 with the recess offset shoulder 59 in Intervention occurs when the angular position with respect to the axis of the material quantity regulating device 1 of the recess offset shoulder 59 and the snap hook 51 match. In this way, the stop element 19 is held in the stroke limiting position, even if the material needle 16 or possibly the material needle spring 47 presses directly on the stop element 19 backwards in the axial direction 13.

To transfer the stop element 19 into the lifting opening position (Fig. 15), the stop element 19 is rotated about its own axis until the snap hook 51 is displaced so far outwards that it is located on the round outer diameter of the stop element 19 and is out of engagement with the Return offset shoulder 59 is coming. By the power that the Material needle 16 or the material needle spring 47 exerts directly on the stop element 19, this is then moved into the stroke opening position.

If a force is exerted on the rear end 6 of the material quantity regulating device 1, the stop element 19 can be moved forward again and secured in the stroke limiting position by rotating it about its own axis. Just like the other design examples, the material quantity regulating device 1 can have a position marking 40 which indicates the angular position of the material quantity regulating device 1 with respect to the paint spray gun.

Based on the figures and the above statements, preferred embodiments of the invention are described merely as examples. Other designs, materials or types of connections are conceivable and will become apparent to a person skilled in the art when reading the statements and the state of the art. All individual features of the exemplary embodiments can be combined with one another, even if this is not explicitly mentioned. This also applies to the exemplary embodiments themselves. The expert will clearly recognize when a combination is not possible or does not make sense. All configurations can be applied to different types of paint guns, even if this is not explicitly described.

Reference symbol list

1. Material quantity regulating device

3. Paint gun

4. front end (of material quantity regulation)

5. Holding means (of material quantity regulation)

6. rear end (of material quantity regulation)

7. Stop surface

8. Adjustment means (of material quantity regulation)

9. Counter element of the paint gun

10. Quick adjustment mechanism

13. Axial direction

14. Thread

15. Cavity

16. Material needle

17. Locking means

18. Adjustment element

19. Stop element

21. Actuating element (for rotary movement)

22. Security element

23. closed end of the stop element

24. Inside of the closed end of the stop element

25. open end of the stop element

26. Outer surface of the stop element

27. Shoulder of the stop element

29. Shoulder of the adjusting element

30. Inner surface of the adjusting element

31. circumferential groove

32. Drilling

33. Bullets

35. Opening inner diameter

36. Fuse inner diameter

37. Spring element

38. Snap button

39. Connecting screw

40. Position marker

41. Coating agent inlet

42. Air valve

43. Air supply connection

44. Pistol grip

45. Trigger guard

46. Air volume control device

47. Material needle spring

48. First quick thread

49. Second quick thread

50. Threaded button

51. Snap hook 52. Return offset

53. Air nozzle

54. Material nozzle

55. Nozzle head 56. Round/wide jet regulation

57. Horns

58. Home air nozzle

59. Return offset shoulder

60. External thread on the threaded button 61. Internal hole on the threaded button

Claims

Expectations

1. Material quantity regulating device (1) for limiting the material needle stroke of a paint gun (3), in particular a hand-held paint gun (3), having a front end (4) with a holding means (5), in particular in the form of a thread (14), by means of which the Material quantity regulating device (1) can be attached to a paint gun (3), a rear end (6) which is opposite the front end (4), a stop surface (7) for limiting the material needle stroke (2), an adjusting means (8), in particular formed through a part of the holding means (5) designed in the form of a thread (14), via which, in interaction with a corresponding counter element (9) of the paint gun (3), an axial position of the stop surface (7) relative to the paint gun (3) to limit the Material needle stroke is adjustable, and a quick adjustment mechanism (10), by means of which the stop surface (7) can be adjusted back and forth in the axial direction (13) relative to the adjusting means (8) between a stroke limiting position and a stroke opening position different from the stroke limiting position, without adjusting the adjusting means (8) and without dismantling the material quantity regulating device (1) from the paint gun (3), characterized in that the stop surface (7) is arranged at least in the stroke limiting position in the axial direction (13) at the level of the holding means (5) or in Axial direction (13) is arranged offset relative to the holding means (5) in the direction of the rear end (6) of the material quantity regulating device (1).

2. Material quantity regulating device (1) for limiting the material needle stroke of a paint gun (3), in particular a hand-held paint gun (3), having a front end (4), a rear end (6), which is opposite the front end (4), a holding means (5) and an adjusting means (8) at the front end (4), a stop surface (7) for limiting the material needle stroke and a quick adjustment mechanism (10) separate from the adjusting means (8), by means of which the stop surface (7) is relative to the holding means ( 5) and the adjusting means (8) can be adjusted back and forth in the axial direction (13) between a stroke limiting position and a stroke opening position that is different from the stroke limiting position, characterized in that the stop surface (7) is at least in the stroke limiting position in the axial direction (13) at the level of the Holding means (5) is arranged or is arranged offset in the axial direction (13) relative to the holding means (5) in the direction of the rear end (6) of the material quantity regulating device (1).

3. Material quantity regulating device (1) according to claim 1 or 2, characterized in that the stop surface (7) at least in the stroke limiting position at the level of the adjusting means (8) or opposite the adjusting means (8) in the direction of the rear end (6) of the material quantity regulating device ( 1) is arranged offset, preferably closer to the rear end (6) than to the front end (4) of the material quantity regulating device (1).

4. Material quantity regulating device (1) according to one of the preceding claims, characterized in that the material quantity regulating device (1) has a cavity (15) which extends from the front end (4) of the material quantity regulating device (1) towards the rear end (6). Material quantity regulating device (1) extends into the interior of the material quantity regulating device (1) and is designed to accommodate a material needle (16) of the paint gun (3).

5. Material quantity regulating device (1) according to one of the preceding claims, characterized in that the stop surface (7) in the stroke limiting position in the axial direction (13) is closer to the front end (4) of the material quantity regulating device (1) than in the stroke opening position (12), preferably wherein the stop surface (7) is positioned in the stroke limiting position within the half of the material quantity regulating device (1), which includes the rear end (6) of the material quantity regulating device (1).

6. Material quantity regulating device (1) according to one of the preceding claims, characterized in that a locking means (17) is provided, by means of which the material quantity regulating device (1) is in a position set by the adjusting means (8) in the axial direction (13) relative to the paint spray gun ( 3) can be locked, the locking means (17) preferably being designed as a lock nut (17).

7. Material quantity regulating device (1) according to one of the preceding claims, characterized in that an adjusting element (18), in particular a sleeve-shaped adjusting element (18), is provided, which comprises the adjusting means (8) and a stop element (19), in particular a sleeve-shaped one Stop element (19) is provided is, which includes the stop surface (7), the stop element (19) and the adjusting element (18) being displaceable relative to one another in the axial direction (13). Material quantity regulating device (1) according to one of the preceding claims, characterized in that the stop element (19) and the adjusting element (18) each have a shoulder (27, 29) which rest against one another in the lifting opening position. Material quantity regulating device (1) according to one of the preceding claims, characterized in that the material quantity regulating device (1) is designed such that the adjustment of the stop surface (7) by means of the quick adjustment mechanism (10), preferably exclusively, with a movement in the axial direction (13). Stop surface (7) takes place and/or the stop surface (7) is adjusted by means of the adjusting means (8) by a screwing movement around the central axis of the material quantity regulating device (1). Material quantity regulating device (1) according to one of the preceding claims, characterized in that the quick adjustment mechanism (10) is designed such that it locks itself automatically in the stroke limiting position and/or the stroke opening position. Material quantity regulating device (1) according to one of the preceding claims, characterized in that the quick adjustment mechanism (10) comprises a securing element (22) which serves to lock the quick adjustment mechanism (10) in the stroke limiting position and/or the stroke opening position, the securing element (22) preferably at least partially surrounds the adjusting element (18) and/or the stop element (19) in the circumferential direction. Material quantity regulating device (1) according to one of the preceding claims, characterized in that the quick adjustment mechanism (10) automatically moves from the stroke limiting position to the stroke opening position by moving a securing element (22). Material quantity regulating device (1) according to one of the preceding claims, characterized in that the material quantity regulating device (1). sleeve-shaped adjusting element (18) and a sleeve-shaped stop element (19) which is arranged in regions within the adjusting element (18) and coaxially mounted on the inner surface (30) of the sleeve-shaped adjusting element (18), the adjusting element (18) being provided with an external thread (14). is, which forms the holding means (5) and the adjusting means (8), a locking means (17) in the form of a lock nut (17) being provided on the external thread (14), the stop element (19) being at one of the front ends ( 4) the end (23) opposite the material quantity regulating device (1) is closed and the stop surface (7) is formed on the inside (24) of the closed end (23), in the area of the open end (25) opposite the closed end (23). ) of the stop element (19), the outer surface (26) of the stop element (19) is provided with a shoulder (27) which, in the lifting opening position, in which the internal stop element (19) extends maximally in the direction of the rear end (6). Material quantity regulating device (1) is displaced, with a shoulder (29) coming into contact with the inner surface (30) of the adjusting element (18) and the movement of the stop element (19) in the axial direction (13) from the front end (4) of the material quantity regulating device (1 ) blocked in the direction of the rear end (6) of the material quantity regulating device (1). Material quantity regulating device (1) according to one of the preceding claims, characterized in that the stop element (19) has a circumferential groove (31) and the adjusting element (18) has bores (32) in which balls (33) radially to the axial direction (13) are slidably mounted, an additional sleeve-shaped securing element (22) being provided which surrounds the area of the rear end (6) of the material quantity regulating device (1) in the area of the bores (32) and the circumferential groove (31) and one in the axial direction (13 ) has a larger opening inner diameter (35) at the front and a smaller securing inner diameter (36) at the rear in the axial direction (13), the securing element (22) being between a securing position relative to the adjusting element (18) and the stop element (19) in the axial direction (13). and an opening position can be moved back and forth, the circumferential groove (31), the bores (32) and the securing inner diameter (36) being at the same height in the axial direction (13) when the securing element (22) is arranged in the securing position and the stop element (19) is arranged relative to the adjusting element (18) in the stroke limiting position, whereby the balls (33) move radially inwards through the securing inner diameter (36) on the securing element (22). are pressed into the groove (31) on the stop element (19) and thereby the stop element (19) is locked relative to the adjusting element (18) in the stroke limiting position, and the bores (32) with the balls (33) mounted therein and the Opening inner diameter (35) on the securing element (22) is at the same height in the axial direction (13) when the securing element (22) is arranged in the open position, whereby the balls (33) move out of the groove (31) on the stop element (19) radially outward into the opening inner diameter (35), and thereby the stop element (19) can be moved back and forth relative to the adjusting element (18) in the axial direction (13) between the stroke limiting position and the stroke opening position. Material quantity regulating device (1) according to one of the preceding claims, characterized in that a spring element (37) is provided, via which the stop element (19) and the securing element (22) are supported against one another in the axial direction (13). Paint gun (3) for dispensing a coating material, in particular a hand-held paint gun (3), with a material needle (16) and a material quantity regulating device (1) for limiting the material needle stroke according to one of the preceding claims, wherein the attachment of the material quantity regulating device (1) is preferably directly the paint gun (3) or via at least one intermediate component. Paint spray gun (3) according to claim 16, characterized in that the stop surface (7) in the stroke limiting position limits the maximum axial deflection of the material needle (16) in the direction of the rear end (6) of the material quantity regulating device (1) in such a way that a relative to the A reduced amount of coating material can be dispensed in the stroke opening position, preferably the maximum deflection of the material needle (16) in the axial direction (13) and in the direction of the rear end (6) of the material quantity regulating device (1) in the stroke opening position through the stop surface (7) is unlimited that the maximum possible amount of coating material can be dispensed. Method for applying coating material using a paint gun (3), in particular a paint gun (3) according to claim 16 or 17, comprising the steps a) Adjusting the material quantity regulating device (1) by means of the adjusting element (18) into a stroke limiting position in which the stop surface (7) allows the material needle (16) to move in the axial direction (13) up to an intermediate position in which a reduced amount of material can be dispensed , b) actuation of a quick adjustment mechanism (10) of the material quantity regulating device (1), by means of which the stop surface (7) is shifted from the stroke limiting position into a stroke opening position without actuation of the adjusting element (18), in which the material needle (16) moves in the axial direction (13) can be opened up to a maximum position and a maximum possible amount of material can be dispensed, c) applying a coating material layer with a maximum possible amount of material dispensed, d) actuation of the quick adjustment mechanism (10), by means of which the stop surface (7) without actuation of the adjusting element (18 ) is transferred back to the stroke limiting position in which the reduced amount of material can be dispensed, e) applying a coating material layer with a reduced amount of material dispensed. Method for applying coating material by means of a paint gun (3), in particular a paint gun (3) according to claim 16 or 17, comprising the steps a) adjusting the material quantity regulating device (1) by means of the adjusting element (18) into a stroke limiting position in which the stop surface (7 ) the movement of the material needle (16) in the axial direction (13) is permitted up to an intermediate position in which a reduced amount of material can be dispensed, b) application of a coating material layer with a reduced amount of material dispensed, c) actuation of a quick adjustment mechanism (10) of the material quantity regulating device (1), by means of the stop surface (7) is moved from the stroke limiting position into a stroke opening position without actuation of the adjusting element (18), in which the material needle (16) can be opened in the axial direction (13) up to a maximum position and a maximum possible amount of material can be dispensed is, d) applying a coating material layer with the maximum possible amount of material released.