Air separating ring for supplying atomising air and shaping air within a paint spray gun

Abstract

The present invention relates to an air separating ring (500) for supplying atomising air and shaping air within a paint spray gun (300), comprising a ring element (511), wherein the ring element (511) has a lateral surface (512), wherein the ring element (511) has a bulge (508) on the lateral surface (512) of the ring element (511), which bulge is designed to be arranged over the first supply hole (11) of the paint spray gun body (10, 50, 301) for atomising air, and / or wherein the ring element (511) has an indentation (54, 107, 507) on the lateral surface (102, 212, 512) of the ring element (511), which indentation is designed to be arranged over the second supply hole (12, 57) of the paint spray gun body (10, 50, 301) for shaping air, wherein the indentation (507) tapers from the first side (513) towards the second side (514) and / or the bulge (508) tapers from the first side (513) towards the second side (514).

Description

[0001] Air separation ring for supplying atomizing air and shaping air within a paint spray gun

[0002] The invention relates to an air separation ring for supplying atomizing air and shaping air within a paint spray gun, a paint spray gun and a use of a nozzle in such a paint spray gun.

[0003] Paint spray guns are generally known in the art and are used, for example, in automotive workshops for painting cars. Paint spray guns are used to atomize flowable material and apply it to a surface. The material to be applied can be either liquid or powder. Paint guns feature different air streams flowing within the spray gun and serving to convey the paint stream, atomize the paint stream, and / or shape the paint stream. An air separation ring is used to direct the different air streams and / or to separate the areas for the different air streams. The restricted geometric conditions within the paint gun make directing the air streams difficult.

[0004] In this context, it has now become apparent that there is a further need to provide an air separation ring for supplying atomizing air and shaping air within a paint gun, in particular there is a need to provide an air separation ring for efficient supply.

[0005] These and other objects, which will be mentioned upon reading the following description or which may be recognized by a person skilled in the art, are achieved by the subject matter of the independent claims. The dependent claims further develop the central idea of ​​the present invention.

[0006] According to a first aspect of the present invention, an air separation ring for supplying atomizing air and shaping air within a paint spray gun is provided, comprising: a ring element configured to be connected to a paint spray gun body on a first side of the ring element and to be connected to a nozzle on a second side of the ring element; wherein the ring element has a lateral surface configured to be arranged between a first supply bore of a paint spray gun body for atomizing air and a second supply bore of the paint spray gun body for shaping air and to guide the atomizing air separately from the shaping air;wherein the ring element has a bulge on the outer surface of the ring element, which is configured to be arranged over the first supply bore of the paint spray gun body for atomizing air, so that the atomizing air is guided into an inner region of the ring element, and / or wherein the ring element has an indentation on the outer surface of the ring element, which is configured to be arranged over the second supply bore of the paint spray gun body for shaping air, so that the shaping air is guided into an outer region of the ring element, wherein the indentation tapers from the first side to the second side and / or the bulge tapers from the first side to the second side.;

[0007] The term “paint spray gun” refers in particular to a hand-held paint dispensing unit with a trigger handle for actuating a valve designed to release a paint flow and / or for actuating a valve designed to release a compressed air flow. The terms “paint gun,” “paint nozzle,” or other designations containing the terms “paint” or “color” are not to be understood as restricting these materials. The paint spray gun according to the invention can be used to spray, for example, paint, adhesive, or varnish, in particular basecoat and clearcoat, both solvent-based and water-based, as well as liquids for the food industry, wood preservatives, or other liquids. In addition to being a hand-held paint gun, the aforementioned paint gun can also be an automatic or robotic gun.Hand-held spray guns are primarily used by tradespeople, especially painters, carpenters, and varnishers. Automatic and robotic spray guns are generally used in conjunction with a painting robot or a painting machine for industrial applications. However, it is certainly conceivable to integrate a hand-held spray gun into a painting robot or a painting machine. In particular, a spray gun according to the invention designed as a hand-held spray gun can be designed as a gravity-feed gun with a paint cup arranged above the spray gun body, from which the material to be sprayed flows into and through the paint channels essentially by gravity and by vacuum at the front end of the paint nozzle.The paint spray gun according to the invention can be a side-feed cup gun, in which the paint cup is arranged laterally on the paint spray gun body, and in which the material is fed by gravity and by vacuum at the front end of the material nozzle of the gun. The paint spray gun according to the invention can be designed as a suction or suspended cup gun with a paint cup arranged below the paint spray gun body, from which the material to be sprayed is sucked out of the cup essentially by vacuum.

[0008] The paint spray gun according to the invention can be designed as a pressure cup gun, in which the cup is arranged below, above, or to the side of the paint spray gun body and is pressurized, whereupon the material to be sprayed is forced out of the cup. The paint spray gun according to the invention can be a pressure-feed gun, in which the material to be sprayed is fed to the spray gun via a hose from a paint container or via a pump. The paint spray gun according to the invention can be a low-pressure gun, in particular an HVLP gun, with an internal nozzle pressure of a maximum of 10 psi or 0.7 bar, whereby transfer rates of more than 65% are achieved. However, it can also be a compliant gun, which has an internal nozzle pressure of more than 10 psi or 0.7 bar, but likewise achieves a transfer rate of more than 65%.However, it can also be a different type of paint gun. The nozzle arrangement according to the invention can be used in all of the aforementioned types of paint guns.

[0009] The term "spray gun body" refers in particular to a housing designed to arrange the components of a spray gun relative to one another and to at least partially enclose them. The spray gun body in particular has a handle. In or on the spray gun body, in particular, a needle valve for applying paint and an air valve for releasing compressed air, a compressed air connection, and a paint connection are arranged. Furthermore, in particular, a paint nozzle body is arranged on the spray gun body. The spray gun body in particular has an interface for the paint nozzle body, and the paint nozzle body has a corresponding interface. The interfaces are in particular designed as threads.The paint spray gun may include a compressed air connection, a paint needle, a trigger for opening an air valve and moving the paint needle out of the paint nozzle outlet, a round-to-wide jet regulator for adjusting the ratio of atomizing air to horn air to shape the paint jet, an air micrometer for adjusting the spray pressure, a material flow regulator for adjusting the maximum material flow rate, a material connection, paint channels for directing the material to be sprayed from a material inlet to the material outlet, a suspension hook, and / or an analog or digital pressure gauge. However, it may also include other components from the prior art. The paint spray gun body may be made of plastic or metal.

[0010] The term “nozzle” in the present case means a nozzle, in particular a paint nozzle, which is designed to dispense paint, or the term “nozzle” in the present case means a nozzle, in particular an air nozzle, which is designed to dispense air, in particular atomizing air, and / or shaping air, which can also be referred to as horn air. The nozzle in particular has an interface for mounting on the paint spray gun body. The nozzle in particular has an interface for connection to an air separation ring. The interface can be a butt connection, wherein the nozzle is pressed against the air separation ring when it is connected, in particular screwed, to the paint spray gun body. The air separation ring is in particular arranged between the nozzle and the paint spray gun body. A further element, in particular a seal, can be arranged between the air separation ring and the nozzle.A further element, in particular a seal, can be arranged between the air separation ring and the spray gun body.

[0011] The term "atomizing air" refers specifically to air, in particular an air flow, designed to convey paint from the nozzle and / or atomize the paint, particularly via the Bernoulli effect. The atomizing air flows, in particular, from an annular gap formed between a paint nozzle and an air cap surrounding this paint nozzle.

[0012] The term "shaping air" refers specifically to air, in particular an air flow designed to shape a paint stream, in particular a spray jet, after it has been expelled from the nozzle. The shaping air flows out, in particular, from an air cap, in particular from the horns of an air cap.

[0013] The term “ring element” refers in particular to a structural element. The ring element in particular has an at least partially circular cross-section. The ring element in particular has an at least partially annular cross-section. The ring element can in particular have at least partially an angular, in particular a quadrangular, in particular square, triangular, or polygonal cross-section. The ring element in particular can at least partially have an elliptical cross-section. The ring element is in particular one-piece. The ring element is, for example, an injection-molded component. The ring element is, for example, made of plastic. The plastic comprises, for example, one of the following: PPA, PP, PE. The plastic comprises, for example, a filled plastic.

[0014] The term "feed bore" refers specifically to the outlet opening of a flow channel located inside the gun body and supplied with compressed air. The flow channel can exit vertically from one end of the spray gun body or at an angle.

[0015] The term “inner region” in the present case means in particular a region within a lateral surface of the ring element, in particular in the radial direction within a lateral surface of the ring element.

[0016] The term “outer region” in the present case means in particular a region outside the lateral surface of the ring element, in particular in the radial direction outside a lateral surface of the ring element. The term “bulge” in the present case means in particular an at least partial distortion of the lateral surface of the ring element that extends away from the center of the ring element. The term “bulge” in the present case means in particular an at least partial distortion of the lateral surface of the ring element, wherein the region of the distortion of the lateral surface is further away in the radial direction from the center of the ring element or from the longitudinal axis of the ring element than the region of the undistorted lateral surface of the ring element, in particular the region of the undistorted lateral surface of the ring element at the same height as the region of the distortion and / or the region of the undistorted lateral surface of the ring element at the same point along the circumference of the ring element but at a different height.

[0017] The term "indentation" in this case refers in particular to an at least partial distortion of the lateral surface of the ring element that extends towards the center of the ring element. The term "indentation" in this case refers in particular to an at least partial distortion of the lateral surface of the ring element, wherein the region of the distortion of the lateral surface is closer in the radial direction to the center of the ring element or to the longitudinal axis of the ring element than the region of the undistorted lateral surface of the ring element, in particular the region of the undistorted lateral surface of the ring element is at the same height as the region of the distortion and / or the region of the undistorted lateral surface of the ring element is at the same point along the circumference of the ring element but at a different height.

[0018] The term “tapered” in the present case means in particular that the distortion of the lateral surface of the ring element decreases over the height of the lateral surface of the ring element. In particular, the distortion decreases from the first side facing the paint spray gun body to the second side facing the nozzle. In particular, the lateral surface of the ring element on the first side facing the paint spray gun body is more distorted than the lateral surface of the ring element on the second side facing the nozzle. In particular, the shape of the ring element deviates more from a circular shape on the first side facing the paint spray gun body than on the second side facing the nozzle. In particular, the ring element has a circular shape on its second side facing the nozzle.In particular, the ring element has a circular shape on its second side, which faces the nozzle, and a non-circular shape on its first side, which faces the paint spray gun body. In particular, the ring element rests on the nozzle with an annular contact surface and on the paint spray gun body with a non-annular contact surface. In particular, the ring element rests on the paint spray gun body with a contact surface that has the shape of a distorted ring. In particular, the ring element rests on the paint spray gun body with a contact surface that has the shape of a ring with a bulge and / or an indentation. In particular, the lateral surface of the ring element runs in the region of the bulge from the first side to the second side in a radial direction from the outside to the inside.In particular, the lateral surface of the ring element in the region of the indentation runs from the first side to the second side in a radial direction from the inside to the outside.

[0019] The invention is based on the realization that the installation space in paint spray guns is limited. This limited installation space means that various supply bores, in particular a first supply bore, from which atomizing air in particular can flow, and a second supply bore, from which shaping air in particular can flow, are located very close to one another. The air separation ring is generally arranged concentrically around the longitudinal axis of the nozzle. The first supply bore and the second supply bore are sometimes at the same or a similar radial distance from the longitudinal axis. Nevertheless, the air separation ring must guide the air flowing out of the first supply bore, in particular atomizing air, and the air flowing out of the second supply bore, in particular shaping air, separately from one another. For this reason, the air separation ring cannot be designed as an ideal hollow cylinder with a constant radius.Furthermore, an important task of the air separation ring is to distribute the atomizing air and the shaping air evenly in the air separation ring so that the atomizing air can escape evenly and the shaping air can escape evenly. Furthermore, this should be achieved with as little throttling of the atomizing air and the shaping air as possible. The invention meets these requirements by proposing a distorted ring element in which the bulge and / or the indentation tapers. The taper reduces the throttling. Furthermore, the taper of the bulge allows the shaping air in the outer area to flow more easily over this bulge. Furthermore, the taper in the inner area allows the atomizing air in the inner area to flow more easily over this indentation. Overall, this has a positive effect on the throttling, the space required and the even distribution of the air flows.This enables efficient and high-quality painting.

[0020] According to one embodiment, an end face of the second side of the ring element is configured to at least partially overlap the first feed bore and / or at least partially the second feed bore.

[0021] In other words, the first feed bore and / or the second feed bore lie on the undistorted cross-sectional area of ​​the ring element. In particular, an imaginary projection of the end face of the second side of the ring element in the axial direction onto the spray gun body at least partially overlaps the first feed bore and / or at least partially the second feed bore.

[0022] In this way, the geometrically available space can be used effectively.

[0023] According to one embodiment, a base area of ​​the bulge and / or the indentation on the first side is configured to overlap the first feed bore and / or the second feed bore in the range of 2 / 3 to 4 / 5.

[0024] In this way, the flow is distributed evenly while keeping throttling low.

[0025] According to one embodiment, the ring element has a baffle plate in the region of the second side in the inner region of the ring element for changing the flow direction of the atomizing air, wherein the baffle plate is arranged at least partially in a peripheral region of the ring element in which the bulge is arranged. The term "in the region of the second side" means in particular that the baffle plate is arranged closer to the second side of the ring element than to the first side of the ring element.

[0026] The term "baffle plate" in this case refers to a structural element designed to change, in particular reverse, the flow direction. The baffle plate can be designed as a type of aperture. The baffle plate can be a flat plate. The term "baffle plate" in this case refers to a structural element onto which at least a portion of the air, in particular a portion of the air flowing out of the paint spray gun body, in particular from the first supply bore and / or from the second supply bore, strikes, in particular impacts. In particular, the air strikes the baffle plate at a right angle. In particular, the air is decelerated by the baffle plate. In particular, the air is deflected by the baffle plate.

[0027] In this way, the flow of atomizing air is first directed into the interior through the bulge and then further directed in both circumferential directions (i.e., clockwise and counterclockwise) by the baffle plate. This can result in better distribution.

[0028] In particular, the impact plate has through-holes. In particular, the impact plate is designed to be continuous; in particular, the impact plate has no through-holes.

[0029] In particular, the baffle plate extends over less than half the circumference of the ring element. In particular, the baffle plate extends over approximately one-eighth the circumference of the ring element. According to one embodiment, the ring element has an air distribution plate in the region of the second side in the inner region of the ring element for directing the atomizing air in the circumferential direction. The same can apply to the air distribution plate as to the baffle plate. In particular, the term air distribution plate means a structural element that is configured to direct, in particular distribute, the atomizing air in the circumferential direction. In particular, the air distribution plate is arranged adjacent to the baffle plate. In particular, the air distribution plate surrounds the baffle plate on at least two sides of the baffle plate. In particular, the baffle plate is arranged in the center of the air distribution plate. In particular, the air distribution plate is crescent-shaped.In particular, the air distribution plate and baffle plate are designed as a single piece. In particular, the air distribution plate extends over less than three-quarters of the circumference of the ring element. In particular, the air distribution plate extends over at most half the circumference of the ring element, in particular over less than half the circumference of the ring element. In particular, the air exiting the first supply bore in the paint gun body first strikes the inner surface of the bulge of the ring element, is guided by this to the pocket and / or the baffle plate, wherein a portion of the air flowing out of the first supply bore can also strike the pocket and / or the baffle plate directly, whereupon the air is deflected by the pocket and / or the baffle plate, in particular to the left and to the right in the circumferential direction.The air is then directed a little further in the circumferential direction by the air distribution plate before the air flows into an air chamber formed by the outside of the paint nozzle and the inside of the air cap and then out of the annular gap formed by the air cap and the paint nozzle cone.

[0030] In particular, the air separation ring, in particular the ring element, unlike air distribution rings according to the prior art, does not have any air distribution elements, in particular air distribution surfaces, which extend substantially over the entire circumference of the air separation ring, in particular the ring element.

[0031] According to one embodiment, the ring element has a baffle plate in the outer region of the second side for changing the flow direction of the shaping air, wherein the baffle plate is arranged at least partially outside a peripheral region of the ring element in which the indentation is located. The same applies to this baffle plate as to the baffle plate described above. In particular, this baffle plate can be arranged adjacent to an air distribution plate.

[0032] In this way, the flow of the shaping air is first directed through the indentation in the

[0033] outer area and further guided in both circumferential directions (ie clockwise and counterclockwise) by the impact plate.

[0034] According to one embodiment, the ring element, in particular a baffle plate of the ring element, has a pocket which is directed towards the first side.

[0035] In this case, the pocket refers to a kind of basin into which the atomizing air or shaping air initially flows before flowing out again and then distributing evenly in both circumferential directions. In particular, the aforementioned baffle plate can have lateral walls.

[0036] In this way, the distribution of the atomizing air or the shaping air is improved.

[0037] According to one embodiment, the indentation of the ring element tapers non-linearly from the first side to the second side and / or the bulge of the ring element tapers non-linearly from the first side to the second side. In particular, the bulge initially tapers only slightly or not at all from the first side to the second side, in the region of the middle height of the ring element the bulge tapers more sharply, and in the region of the second side the bulge tapers slightly or not at all again. In particular, the indentation initially tapers only slightly or not at all from the first side to the second side, in the region of the middle height of the ring element the indentation tapers more sharply, and in the region of the second side the indentation tapers slightly or not at all again.

[0038] According to one embodiment, the indentation of the ring element tapers linearly from the first side to the second side and / or the bulge of the ring element tapers linearly from the first side to the second side.

[0039] Particularly preferably, the bulge of the ring element tapers non-linearly from the first side to the second side, and the indentation of the ring element essentially does not taper. In particular, the lateral surface of the ring element runs essentially parallel to the longitudinal axis of the ring element in the region of the indentation from the first side to the second side.

[0040] According to one embodiment, the ring element has a first inner diameter in the region of the first side and a second inner diameter in the region of the second side, wherein the first inner diameter is larger than the second inner diameter. This applies in particular in the areas away from the indentation and / or away from the bulge. According to one embodiment, the ring element has connecting elements on the first side for connection to the paint spray gun body.

[0041] The connecting elements are, for example, plug-in elements that are inserted into corresponding recesses (i.e., connecting elements) in the spray gun body. The connecting elements are, for example, locking elements.

[0042] According to one embodiment, the air distribution ring comprises a plastic, in particular a filled plastic, in particular PPS, as material.

[0043] Another aspect relates to a paint spray gun comprising: a paint spray gun body; a nozzle; and an air separation ring as described in more detail above.

[0044] Between the air separation ring, in particular its pocket or its air distribution plate, and the paint nozzle, a gap is formed through which atomizing air can flow.

[0045] Another aspect concerns the use of a nozzle in a paint spray gun described in more detail above.

[0046] The features described above, including those from different embodiments, can also be combined with each other, resulting in synergistic interactions that go beyond the sum of the individual effects.

[0047] The invention is explained below using exemplary embodiments, which are described with reference to the following figures:

[0048] Figure 1 shows an exemplary spray gun body;

[0049] Figure 2 shows an exemplary paint spray gun body with an exemplary air separation ring according to the invention;

[0050] Figure 3 shows an exemplary air separation ring according to the invention in a first view;

[0051] Figure 4 shows an exemplary air separation ring according to the invention in a second view; Figure 5 shows another exemplary air separation ring according to the invention;

[0052] Figure 6 shows another exemplary air separation ring according to the invention in a first view;

[0053] Figure 7 shows the further exemplary air separation ring according to the invention in a second view;

[0054] Figure 8 shows the further exemplary air separation ring according to the invention in a third view;

[0055] Figure 9 shows the further exemplary air separation ring according to the invention in a fourth view;

[0056] Figure 10 shows the further exemplary air separation ring according to the invention in a fifth view; and

[0057] Figure 11 shows a section of an exemplary paint gun according to the invention.

[0058] Exemplary embodiments are described and explained below with reference to the figures listed above. Like reference symbols or analogous reference symbol structures refer to analogous or interacting components.

[0059] Figure 1 shows an exemplary paint spray gun body 10 of a paint spray gun. The interface 13 for the nozzle, in particular the paint nozzle, is shown in the center. From this interface, the paint is conveyed into the paint nozzle. The first supply bore 11 for the atomizing air and the second supply bore 12 for the shaping air are located below the interface 13. Both supply bores 11 and 12 are partially located at the same radial distance from the interface 13. Furthermore, the connecting elements (here plug-in openings) 15, 16, and 17 for connecting the air separation ring (not shown) to the paint spray gun body 10 can be seen.

[0060] Figure 2 shows an exemplary paint spray gun body 50 on which an exemplary air separation ring 51 according to the invention is arranged. In this case, the air separation ring 51 is arranged concentrically around the interface to the nozzle. The air separation ring 51 comprises a ring element 52. In this case, the ring element 52 comprises a bulge 53 that overlaps the first supply bore such that the atomizing air is directed into an inner region 55 of the ring element 52. In this case, the ring element 52 comprises an indentation 54 that overlaps the second supply bore 57 such that the shaping air is guided into an outer region 56 of the ring element 52. In this case, the ring element 52 is made of PPS. The end face 58 of the ring element 52, which faces away from the paint spray gun body 50, at least partially overlaps the first supply bore and the second supply bore 57.

[0061] Figure 3 shows an air separation ring 100 in a first view. The air separation ring 100 comprises a ring element 101. The ring element 101 is configured to be connected to a paint spray gun body on a first side 103 of the ring element 101 and to a nozzle on a second side 104 of the ring element 101. The ring element 101 has a lateral surface 102. The end face 105 of the ring element 101 covers or overlaps, in the installed state, at least partially the first and / or second supply bore (see Figure 1 or 2). The ring element 101 has an indentation 107 and a bulge 108. The indentation 107 tapers from the first side 103 to the second side 104. The bulge 108 tapers from the first side 103 to the second side 104. In the inner region of the ring element 101, a baffle plate 106 is arranged in this case for changing the flow direction of the atomizing air.This is arranged opposite the bulge 108.

[0062] Figure 4 shows an exemplary air separation ring 200 according to the invention in a second view, namely the bottom view. The air separation ring 200 has connecting elements 201, 202, and 203 for connecting the air separation ring 200 to the paint gun body (not shown in Figure 4). The baffle plate 204 has a pocket 205. The air separation ring 200 has a ring element 222 with a circumferential surface 212. The ring element 222 has a first side 213 and a second side 214.

[0063] Figure 5 shows another exemplary air separation ring 400 according to the invention, which comprises a ring element 401, wherein only the second side 404 and the end face 415 of the ring element 401 are visible in the top view in Figure 5. In the embodiment shown in Figure 5, the pocket 405 or the impact plate of the pocket 405 does not have any through-holes, unlike in the previously shown embodiments.

[0064] Figure 6 shows a further exemplary air separation ring 500 according to the invention in a first view, namely obliquely from above. The air separation ring 500 has a ring element 511 with a lateral surface 512, a first side 513, a second side 514, an end face 525, and a pocket 505. The ring element 511 has a bulge 508 and an indentation 507. In the region of the second side 514, in the inner region 55 of the ring element 511, the ring element 511 has an air distribution plate 506 for directing the atomizing air in the circumferential direction. The air distribution plate 506 extends circumferentially to the left and right of the pocket 505 and is crescent-shaped. The outer region 56 is located outside the ring element 511.

[0065] Figure 7 shows the further exemplary air separation ring 500 according to the invention in a second view, namely obliquely from below. The air separation ring 500 has a ring element 511 with a lateral surface 512, a first side 513, a second side 514, an end face 525, and a pocket 505. In the region of the second side 514 in the inner region 55 of the ring element 511, the ring element 511 has a baffle plate 504 for changing the flow direction of the atomizing air, wherein the baffle plate 504 is arranged at least partially in a circumferential region of the ring element 511 in which the bulge 508 is arranged. The ring element 511 has a bulge 508 and an indentation 507.The ring element 511 has, in the region of the second side 514 in the outer region of the ring element 511, a baffle plate 515 for changing the flow direction of the shaping air, wherein the baffle plate 515 is arranged at least partially outside a circumferential region of the ring element 511 in which the indentation 507 is arranged. In the region of the second side 514 in the inner region of the ring element 511, the ring element 511 has an air distribution plate 506 for directing the atomizing air in the circumferential direction. The air distribution plate 506 extends in the circumferential direction to the left and to the right from the pocket 505 and is crescent-shaped. The air separation ring 500 has connecting elements 501, 502, 503 for connecting the air separation ring 500 to the paint gun body (not shown in Figure 7). The connecting elements 501, 502, 503 have a non-circular cross-section, but a cross-section in the shape of a triangle with rounded corners.The connecting elements, in particular the receiving openings, in the paint spray gun body preferably have a cross-section corresponding to the cross-section of the connecting elements 501, 502, 503 in terms of their shape and size.

[0066] Figure 8 shows the further exemplary air separation ring 500 according to the invention in a third view, namely a top view. Clearly visible here are the second side 514 and the end face 525 of the ring element 511, as well as the bulge 508, the pocket 505, and the air distribution plate 506.

[0067] Figure 9 shows the further exemplary air separation ring 500 according to the invention in a fourth view, namely from below. Clearly visible here are the first side 513 of the ring element 511, the impact plate 504, the pocket 505, the air distribution plate 506, the indentation 507, the bulge 508, the impact plate 515, and the connecting elements 501, 502, 503. Figure 10 shows the further exemplary air separation ring 500 according to the invention in a fifth view, namely a side view. It is particularly clearly visible here that the bulge 508 on the outer surface 512 of the ring element 511 tapers non-linearly from the first side 513 to the second side 514.Rather, the bulge 508 initially tapers only slightly or not at all from the first side 513 to the second side 514. In the region of the middle height of the ring element 511, the bulge 508 tapers more sharply, and in the region of the second side 514, the bulge 508 tapers again slightly or not at all. Figure 10 also clearly shows that the connecting elements 501, 502, 503 are at least partially hook-shaped.

[0068] Figure 11 shows a section of a sectional view of an exemplary paint spray gun 300 according to the invention. The paint spray gun 300 comprises the paint spray gun body 301. The nozzle 302, in particular a paint nozzle, is screwed into the paint spray gun body 301. The air separation ring 303 is arranged between the paint spray gun body 301 and the nozzle 302. The line 304 indicates the flow path of the atomizing air. The line 305 indicates the flow path of the shaping air, with the shaping air being guided through the air cap 306.

[0069] Reference symbol

[0070] 10, 50, 301 spray gun body

[0071] 11 first feed hole

[0072] 12, 57 second feed hole

[0073] 13 Interface nozzle spray gun body

[0074] 15, 16, 17 Connecting elements spray gun body

[0075] 52, 101, 222, 401, 511 ring element

[0076] 53, 108, 508 bulge

[0077] 54, 107, 507 indentation

[0078] 55 Interior

[0079] 56 Outdoor area

[0080] 51, 100, 200, 303, 400, 500 air separation ring

[0081] 102, 212, 512 lateral surface

[0082] 103, 213, 513 first page

[0083] 104, 214, 404, 514 second page

[0084] 105, 415, 525, 58 frontal area

[0085] 106, 204, 504 baffle plate

[0086] 201 , 202, 203, 501, 502, 503 Connecting elements air separation ring

[0087] 205, 405, 505 bag

[0088] 300 paint spray gun

[0089] 302 nozzle

[0090] 304 Atomizing air flow path

[0091] 305 Flow path shaping air

[0092] 306 air cap

[0093] 506 Air distribution plate

[0094] 515 second baffle plate

Claims

Claims 1. Air separation ring (51, 100, 200, 303, 400, 500) for supplying atomizing air and shaping air within a paint gun (300), comprising: a ring element (52, 101, 222, 401, 511) which is arranged on a first side (103, 213, 513) of the ring element (52, 101, 222, 401, 511) to be connected to a paint gun body (10, 50, 301) and to be connected to a nozzle (302) on a second side (104, 214, 404, 514) of the ring element (52, 101, 222, 401, 511); wherein the ring element (52, 101, 222, 401, 511) has a lateral surface (102, 212, 512) which is designed to be arranged between a first supply bore (11) of a paint spray gun body (10, 50, 301) for atomizing air and a second supply bore (12, 57) of the paint spray gun body (10, 50, 301) for shaping air and to guide the atomizing air separately from the shaping air;wherein the ring element (52, 101, 222, 401, 511) has a bulge (53, 108, 508) on the outer surface (102, 212, 512) of the ring element (52, 101, 222, 401, 511), which is designed to be arranged over the first supply bore (11) of the paint gun body (10, 50, 301) for atomizing air, so that the atomizing air is guided into an inner region (55) of the ring element (52, 101, 222, 401, 511), and / or wherein the ring element (52, 101, 222, 401, 511) has an indentation (54, 107, 507) on the outer surface (102, 212, 512) of the ring element (52, 101, 222, 401, 511), which is designed to be arranged over the second supply bore (12, 57) of the paint spray gun body (10, 50, 301) for shaping air, so that the shaping air is guided into an outer region (56) of the ring element (52, 101, 222, 401, 511), characterized in that the indentation (54, 107, 507) extends from the first side (103, 213, 513) to the second side (104,; 214, 404, 514) and / or the bulge (53, 108, 508) tapers from the first side (103, 213, 513) to the second side (104, 214, 404, 514).

2. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein an end face (58, 105, 415, 525) of the second side (104, 214, 404, 514) of the ring element (52, 101, 222, 401, 511) is arranged to at least partially overlap the first supply bore (11) and / or at least partially the second supply bore (12, 57).

3. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein a base area of ​​the bulge (53, 108, 508) and / or the indentation (54, 107, 507) on the first side (103, 213, 513) is arranged to overlap the first supply bore (11) and / or the second supply bore (12, 57) in the range of 2 / 3 to 4 / 5.

4. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the ring element (52, 101, 222, 401, 511) in the region of the second side (104, 214, 404, 514) in the inner region (55) of the ring element (52, 101, 222, 401, 511) has a baffle plate (106, 204, 504) for changing the flow direction of the atomizing air and wherein the baffle plate (106, 204, 504) is arranged at least partially in a peripheral region of the ring element (52, 101, 222, 401, 511) in which the bulge (53, 108, 508) is arranged is.

5. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the ring element (52, 101, 222, 401, 511) in the region of the second side (104, 214, 404, 514) in the inner region (55) of the ring element (52, 101, 222, 401, 511) has an air distribution plate (506) for guiding the atomizing air in the circumferential direction.

6. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the ring element (52, 101, 222, 401, 511) in the region of the second side (104, 214, 404, 514) in the outer region of the ring element (52, 101, 222, 401, 511) has a baffle plate (515) for changing the flow direction of the shaping air, and wherein the baffle plate (515) is arranged at least partially outside a peripheral region of the ring element (52, 101, 222, 401, 511) in which the indentation (54, 107, 507) is arranged.

7. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the ring element (52, 101, 222, 401, 511), in particular a baffle plate (106, 204, 504, 515) of the ring element (52, 101, 222, 401, 511), has a pocket (205, 405, 505) directed towards the first side (103, 213, 513).

8. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the indentation (54, 107, 507) tapers non-linearly from the first side (103, 213, 513) to the second side (104, 214, 404, 514) and / or the bulge (53, 108, 508) tapers non-linearly from the first side (103, 213, 513) to the second side (104, 214, 404, 514).

9. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the indentation (54, 107, 507) tapers linearly from the first side (103, 213, 513) to the second side (104, 214, 404, 514) and / or the bulge (53, 108, 508) tapers linearly from the first side (103, 213, 513) to the second side (104, 214, 404, 514).

10. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the ring element (52, 101, 222, 401, 511) has a first inner diameter in the region of the first side (103, 213, 513) and a second inner diameter in the region of the second side (104, 214, 404, 514), wherein the first inner diameter is larger than the second inner diameter.

11. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the air separation ring (51, 100, 200, 303, 400, 500) has connecting elements (201, 202, 203, 501, 502, 503) on the first side (103, 213, 513) for connection to the paint spray gun body (10, 50, 301).

12. Air separation ring (51, 100, 200, 303, 400, 500) according to one of the preceding claims, wherein the air distribution ring comprises a plastic, in particular a filled plastic, in particular PPS, as material.

13. A paint spray gun (300) comprising: a paint spray gun body; a nozzle; and an air separation ring (51, 100, 200, 303, 400, 500) according to one of claims 1 to 12.

14. Use of a nozzle in a paint spray gun (300) according to claim 13.

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