EP3829778A2

EP3829778A2 - Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for seelcting a nozzle module from a set of nozzles for a paint job, selection system and computer program product

Info

Publication number: EP3829778A2
Application number: EP18758803.3A
Authority: EP
Inventors: Eva VOLK; Michael Pantle; Norbert Maier; Mazin MASHALLA
Original assignee: SATA GmbH and Co KG
Current assignee: SATA GmbH and Co KG
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2021-06-09
Also published as: US20210379612A1; CN112533705B; CN112533705A; WO2018184636A2; US11826771B2; WO2018184636A3; DE112018007865A5

Abstract

The invention relates to a set of nozzles for a spray gun (1), especially for a compressed-air paint spray gun, comprising at least one nozzle module group (10, 20, 30, 40) with at least two, preferably at least four different nozzle modules (15) for the optional mounting in or on one and the same base module (11) of a spray gun (1). The nozzle modules (15) are designed such that they have different medium flow rates under the same spray conditions, the spray jets which can be generated by means of the nozzle modules (15) having substantially the same spray jet section height (h) and the same spray jet section width (b), the spray jet sections of the different nozzle modules (15) in particular being congruent. The invention further relates to a spray gun system, a method for embodying a nozzle module, a method for selecting a nozzle module from a set of nozzles for a paint job, a selection system, in particular a "slide gate system", and a computer program product. The present invention enables the user to select the nozzle module which is ideal for the paint job and mode of operation in question.

Description

Spray Nozzle Set, Spray Gun System, Method of Designing a Nozzle Module, Method of Selecting a Nozzle Module from a Nozzle Set for One

Painting task, selection system and computer program product

The invention relates to a nozzle set for a spray gun, in particular a

air atomizing paint spray gun, according to the preamble of claim 1, a

A spray gun system according to the preamble of claim 10, a method for

Design of a nozzle module according to the preamble of claim 1 1, a method for selecting a nozzle module from a nozzle set for a Lackieraufgabe according to the preamble of claim 13, a selection system, in particular a "slide system", according to the preamble of claim 14 and a computer program product according to the preamble of claim 15.

According to the state of the art, a spray gun, in particular a paint spray gun, in particular a compressed air atomizing paint spray gun, which can also be referred to as a spray gun, has at its head a material nozzle, which is also called a paint nozzle and which is screwed into the gun body. The

Fluid nozzle often has a hollow cylindrical suppository at its anterior end, i. a substantially hollow cylindrical front portion, from the front mouth, the Materialauslassöffnung, the material to be sprayed exits during operation of the spray gun. However, the material nozzle may also be conical in its front region. The gun head usually has an external thread, via which an air nozzle ring with an air cap arranged therein is screwed to the gun head. The air cap has a central opening whose diameter is larger than the outer diameter of the

Fluid nozzle cup or the outer diameter of the front end of a conical material nozzle. The central opening of the air cap and the suppository or the front end of the material nozzle together form an annular gap. From this annular gap emerges the so-called atomizing air, which generates in the nozzle arrangement described above, a vacuum on the end face of the material nozzle, whereby the material to be sprayed from the

Material nozzle is sucked out. The atomizing air strikes the jet of color, which tears the jet of color into threads and ribbons. These threads and bands disintegrate due to their hydrodynamic instability, the interaction between the fast flowing compressed air and the ambient air, and due to aerodynamic disturbances

Droplets are blown away from the nozzle by the atomizing air. The air cap often also has two horns, which are diametrically opposed to each other and protrude in the outflow direction over said annular gap and the material outlet opening. From the back of the air cap there are two supply holes, ie horn air supply ducts, to horn air outlet openings in the horns. As a rule, each horn has at least one horn air outlet opening, but preferably each horn has at least two horn air outlet openings, from which the horn air emerges. The

Hornluftauslassöffnungen are usually oriented so that they point to the nozzle longitudinal axis in the exit direction after the annular gap, so that the horn air outlet emerging so-called horn air can affect the already exited from the annular gap air or the color jet or the already at least partially formed paint mist. As a result, the color jet or spray jet is compressed with originally circular cross-section (omnidirectional) on its sides facing the horns and extended in perpendicular direction. This creates a so-called broad jet, which allows a larger Flächenlackiergeschwindigkeit. In addition to the deformation of the spray jet horn air aims a further atomization of the spray jet.

The above-mentioned material nozzle typically has a hollow main portion and a substantially hollow-cylindrical front portion with a material outlet opening, wherein the material to be sprayed flows through the material outlet opening. Depending on which material is to be sprayed and depending on the preference of the user of the spray gun, the spray gun with material nozzles with different sized Materialauslassöffnung, i.

Material outlet with different sized inner diameter, be equipped. If the material to be sprayed, e.g. Paint to a higher viscosity material, eg filler, is usually a material nozzle with a Materialauslassöffnung with larger inner diameter to choose than for low-viscosity material such as clearcoat. Usually, the inner diameter of a material outlet opening of a material nozzle is between a few tenths of a millimeter and several millimeters. A material nozzle with a

Material orifice with a given internal diameter is often referred to as a material nozzle with a particular "nozzle size", the value of this nominal nozzle size need not exactly match the value of the inside diameter of the material orifice, depending on the size of the nozzle, ie, the size of the material diameter of the fluid nozzle the material nozzle or equipped with the material nozzle

Spray gun, have a certain material throughput. The material throughput refers to the amount of material that emerges from the material nozzle of the spray gun in a certain time, namely at a defined input flow pressure and fully actuated trigger guard. The value is given in grams per minute (g / min). With otherwise constant parameters of the material flow rate increases with the nozzle size, wherein the material flow rate is influenced not only by the inner diameter of the Materialauslassöffnung, but also by the length of the hollow cylindrical front portion, the arrangement of the various surfaces in the interior of the material nozzle, in particular by the angle in which the surfaces are arranged to each other, and by other embodiments of the material nozzle.

In spray guns according to the prior art varies with increasing

Material throughput, the size of the spray jet generated by the spray gun, in particular the height and / or width of the spray jet or the spray jet cross-section. Of the

Spray jet cross-section can be illustrated by means of a so-called spray pattern. One

Spray pattern is usually created by means of the spray gun, which at a certain distance, for example, 15 cm to 20 cm, in front of a substrate, for example. Paper, a paper with scale, which is intended for the preparation of a spray pattern, or a sheet, Paint or varnish is applied to this sheet of paper or sheet without moving the spray gun. The spraying time is about 1 to 2 seconds. The shape of the generated in these ways

Spray pattern and the size of the droplets on the substrate provide information about the quality of the spray gun, in particular about the quality of the nozzle.

The layer thickness of the spray pattern can be determined by means of the methods known in the art, for example by means of layer thickness measuring devices before or after drying of the

Spray pattern, or the color droplets and their size and position are still on the substrate during the flight. detected by laser diffraction method.

A spray pattern as described above does not have a uniform layer thickness over its length and width. The central core of the spray pattern has a high layer thickness, outside the core, the layer thickness produced is lower. The layer thickness transition between core and exterior is fluid. If one plots the layer thickness over the length of the spray pattern, then, starting from left to right, first a flat rise, which marks the outer edge of the outer area. In the vicinity of the core, the layer thickness increases relatively steeply and, in the ideal case, remains essentially constant over the course of the length of the core, ie it shows a plateau. At the edge of the core, the layer thickness drops relatively steep, followed by a flatter drop towards the end of the outside area. It has been found that a uniform coating of better quality can be produced, the sharper the transition between the core and exterior, ie the steeper the course of the layer thickness over the length of the spray pattern in the transition from the outside into the core area. While During the painting process, the painter moves the actuated spray gun in meandering paths, with the webs overlapping in a range between 30% to 50% of their height, ie, about the lower or upper third of a web overlaps the upper and lower third of the preceding web. A sharper defined core area enables the painter to apply the core areas of the spray paths as close together as possible during the painting process in such a way that a uniform overall layer thickness results. However, the transition may not be too steep, otherwise the risk of

Overcoating, e.g. by accidentally applying the double layer thickness, resulting in so-called color runners. Further, the experiments have shown that it is advantageous if the above plateau is as wide as possible, i. the core area of the spray pattern with maximum layer thickness is as long as possible.

In the present case, the spray pattern should represent the spray jet cross-section. In the following, the spray jet cross-sectional height, spray jet cross-sectional width or cross-sectional shape of the spray jet is the term used, meaning the height, the width or the shape of the spray pattern, in particular the height, the width or the shape of the core region of the spray pattern.

As already mentioned, with spray guns according to the prior art, the size of the spray jet generated by the spray gun, in particular the height and / or the width of the spray jet or of the spray jet cross section or of the spray jet core cross section, changes with increasing material throughput. With increasing nozzle size and / or increasing material throughput, not only is the spray jet "wet" as desired, ie more material is applied per surface but the spray jet cross section becomes higher and / or wider For example, a so-called 1, 2 nozzle may have a material throughput that is 10 g / min greater than a 1, 1 nozzle, but a material throughput that is 20 g / min less than a 1, 3 nozzle For example, if the user wants to spray one material of a certain viscosity and then a material of a different viscosity and therefore changes from one nozzle size to another nozzle size, he or she must, for example, adjust the distance the spray gun to be coated surface or adjust its painting speed, ie the speed at which it moves the spray gun over the area to be coated, to the new nozzle. This can complicate the work of the user of the spray gun. Furthermore, the user of spray guns according to the prior art does not have the possibility of one for him and his Mode of operation advantageous beam shape, ie to select a spray jet with an advantageous spray jet for him cross-section.

It is therefore an object of the present invention to provide a nozzle set for a spray gun, in particular a spray paint spray gun, and a spray gun system which offers the user greater consistency in the painting results.

Another object of the present invention is to provide an efficient method for

To provide embodiments of a nozzle module.

Another object of the present invention is to provide an efficient method of selecting a nozzle module.

Another object of the present invention is to provide an efficient selection system, in particular a "pusher system".

Another object of the present invention is to provide a functionally reliable

To provide computer program product. The first object is achieved by a nozzle set for a spray gun, in particular a compressed air atomizing spray gun, the at least one nozzle module group with at least two, preferably at least four, different nozzle modules for optional mounting in or on one and the same body Module having a spray gun, wherein the nozzle modules are designed such that they have the same injection conditions a different material flow rate, and wherein the injectable by means of the nozzle modules injection streams have substantially the same spray jet cross-section height and the same spray jet cross-sectional width, in particular the spray jet cross sections of the various Nozzle modules are congruent.

The nozzle modules within the nozzle module group each have a different material throughput, in particular are nozzles with different nozzle sizes, in particular nominal nozzle sizes. The nozzle module group may include, for example, a 1-liter nozzle module, a 1, 2-nozzle module, a 1, 3-nozzle module, a 1, 4-nozzle module and a 1, 5 Nozzle module comprising a material throughput that increases with the nominal nozzle size. The nominal nozzle size can be essentially the

actual nozzle size, i. the actual inside diameter of the

Material outlet of the nozzle of the nozzle module in millimeters, correspond. So can For example, the inner diameter of the 1, 5-nozzle module 1, 5 mm. The 1, 3-nozzle module, however, may for example be an inner diameter of the material outlet of the paint nozzle of 1, 4 mm, the material throughput compared to the 1, 4-nozzle module, for example, by other geometries and / or dimensions, in particular angles and lengths, in particular, the length of a substantially hollow cylindrical front portion of the paint nozzle can be reduced. At the same time or alternatively, the

Material outlet of the nozzle of the 1, 4-nozzle module a larger

Inner diameter than 1, 4 mm.

The at least two, preferably at least four, different nozzle modules of the nozzle module group of the nozzle set according to the invention can optionally be arranged in or on one and the same base module of a spray gun. This means a first nozzle module arranged on the main body module, for example a nozzle module with a first material throughput, for example a 1, 2 nozzle module with one

Material throughput of 150 g / min, can be removed from the main body module, in particular unscrewed, preferably via a quick-release, and another nozzle module from the nozzle module group of the nozzle set according to the invention with a second material throughput, for example a 1, 5 Nozzle module with a material throughput of 195 g / min, can be arranged on the same base module, preferably via the same quick-release closure. At the same spraying conditions, the nozzle modules of the nozzle module group of the nozzle set according to the invention have a different material throughput and the spray steels producible by means of the nozzle modules have essentially the same

Spray jet cross-section height and spray jet cross-section width. The spraying conditions which should be the same may be, for example, the inlet flow pressure, the air pressure at the inlet of the spray gun, the distance and angle of the spray gun to the object to be coated, the material to be sprayed, the degree of actuation of the trigger guard, the setting of a rotary spray gun. Wide-beam regulation, but also to climatic conditions such as temperature,

Humidity and ambient pressure act. As mentioned above, in the present case, the spray pattern should represent the spray jet cross-section. The fact that the spray jet cross-sectional height and the spray jet cross-sectional width are essentially the same here means that the height and the width of the spray pattern, in particular the core of the spray pattern, ie the area of the spray pattern with the highest layer thickness, are substantially the same. Particularly preferably, the spray jet cross-sections of the various nozzle modules are congruent, ie the spray patterns are essentially identical in shape and size. Due to the different

Material throughputs of the nozzle modules, the layer thickness of the spray patterns is different.

A nozzle module may in particular have a material nozzle and an air cap. Furthermore, it may have an air nozzle ring, via which the nozzle module can be screwed to the main body module, and a paint needle for closing and releasing the

Material outlet opening of the material nozzle.

An advantage of the nozzle set according to the invention is that the user of the spray gun, for example the vehicle painter, when changing the nozzle size, i. when exchanging the nozzle module arranged on the main body module of the spray gun with a first material throughput through a nozzle module with a second material throughput, no change in the spray jet cross section height and spray jet cross section width has to be accepted. Preferably, with the newly arranged nozzle, it receives a spray jet having the same cross-sectional shape and dimension as the remote nozzle. The painter must therefore not change its mode of operation, in particular the distance of the spray gun from the object to be coated, after the nozzle change.

The spray gun system according to the invention is characterized in that it has at least one nozzle set described above and in more detail below and a main body module, wherein the nozzle modules of the nozzle set can be arranged interchangeably on the main body module. Each of the various nozzle modules from the various nozzle module groups can be arranged exchangeably on one and the same base module. Preferably, the various nozzle modules have the same connection type, so that they can be arranged directly on the main body module, for example via a thread, in particular a

Trapezoidal thread, which may be designed as a quick-action screw or connection, or via a bayonet connection, a connector or other known in the art connection. However, it is also conceivable that a first nozzle module has a different connection type than a second nozzle module, and one of the nozzle modules can be arranged via an adapter on the main body module.

The method according to the invention for configuring a nozzle module, in particular a nozzle module for a nozzle set described in greater detail below, has at least one step defining at least one spray jet cross-section height and / or one spray jet cross-sectional width and / or one spray jet cross-sectional shape spraying jet to be generated by the nozzle module, and as at least one further step constructing the nozzle module, which comprises a spray jet having the predetermined spray jet cross-sectional height and / or spray jet cross-sectional width and / or

The method comprises constructing an air cap, in particular adjusting an outer horn air outflow angle and / or an inner Hornluftausström angle and / or a control bore distance to a material flow rate and / or to a nozzle internal pressure of the nozzle module wherein the outer horn air discharge angle is the angle at which horn air flows out of an outer horn air outlet opening of the air cap relative to a perpendicular axis, the perpendicular axis perpendicular to a central axis of the air cap inside Hornluftausström angle is around the angle, in the horn air from an inner

Horn air outlet opening of the air cap relative to the Lot axis flows out, and wherein the control bore distance is the distance between at least one control bore in the air cap and a central opening in the air cap. For example, it may be determined in the first step that the spray jet to be generated by the nozzle module has a spray jet cross-sectional height of approximately 27 cm and / or a

Spraying beam cross-section width of about 4 cm and / or an oval, in particular elliptical spray jet cross-sectional shape should have. Again, it is again the height, width and shape of the spray pattern, especially the core of the spray pattern. Subsequently, the nozzle module, which generates a spray jet with the specified spray jet cross-sectional height, spray jet cross-sectional width and / or spray jet cross-sectional shape, is constructed. In particular, an air cap for the nozzle module is constructed. Such an air cap may in particular have two horns, which are diametrically opposed to one another and project forward, ie in the direction of injection, over a central opening in the air cap. From the back of the air cap there are two supply holes, ie horn air supply ducts, to horn air outlet openings in the horns. Preferably, each horn has at least two horn air outlet openings, from which the horn air emerges. As already described above, the Hornluftauslassöffnungen are usually oriented so that the leaking from the Hornluftauslassöffnungen horn air can affect the already exited from the above-mentioned annular gap air or the color jet or the already at least partially formed paint mist. Such an air cap can also have control openings in the area adjacent to the central opening. These control openings, which are hereinafter referred to as control bores, although they must not be designed as holes, but are preferably those, reach into the interior of the air cap and be in Operation of the spray gun from there supplied with air. The air emerging from the control bores, the so-called control air, impinges on the horn air exiting the horn air outlet openings and deflects them and fans out the horn air jet, ie it broadens it and weakens the horn air jet. The control air also acts on the round jet and causes a slight pre-deformation as well as an additional atomization. In both cases, the control air contributes to the further atomization of the color jet and reduces the contamination of the air cap by spray because it carries it away from the air cap. In particular, the air cap may each have three control bores arranged on two opposite sides of the central opening, which are arranged in the form of a triangle, wherein a tip of the triangle is aligned in the direction of the inner or outer Hornluftauslassöffnungen, ie the bore, the tip of the triangle preferably lies in line with the inner horn air outlet opening, the outer horn air outlet openings and the center of the central opening in the air cap. The control bores can have the same diameter, advantageously between 0.45 mm and 0.65 mm. However, the air cap can also only two on two opposite sides of the central

Having opening disposed control bores, which are preferably in a line and in line with the inner Hornluftauslassöffnung, the outer Hornluftauslassöffnungen and the center of the central opening in the air cap.

The inventive method comprises in particular the adaptation of an outer

Hornluftausström angle and / or an inner Hornluftausström angle and / or a control bore distance to a material flow rate and / or an internal nozzle pressure of the nozzle module, wherein the outer Hornluftausström angle is the angle in the horn air from an outer horn air outlet opening of the air cap flows relative to a Lot axis, wherein the Lot axis is perpendicular to a central axis of the air cap, wherein the inner Hornluftausström angle is the angle in the horn air from an inner Hornluftauslassöffnung the air cap relative flows out to the solder axis, and wherein the control bore distance is the distance between at least one control bore in the air cap and a central opening in the air cap.

Of course, the horn air spreads after exiting the Hornluftauslassöffnung something or fan out. In the present case, the angle at which the main part of the horn air or the center of the horn air jet is relative to the horn air outlet angle is to be regarded as Hornluftausström

described Lot axis flows out. In particular, it may be at the Hornluftausström- angle to the angle of the central axis of the Hornluftauslasskanals, in particular the

Hornluftauslassbohrung whose or the end of the Hornluftauslassöffnung forms, relative to act the Lot axis. The central axis of the air cap, to which the solder axis is perpendicular, extends in particular through the center of the central opening in the air cap.

If a control bore is in line with the Hornluftauslassöffnungen, the control bore distance is understood here as the distance between the above-mentioned central axis of the air cap and an axis parallel to this central axis through the center of the corresponding control bore. Otherwise, the control bore distance is understood here as the distance between the above-mentioned central axis and an axis parallel to this central axis by a projection of the center point of the corresponding control bore on the cross-sectional plane. The cross-sectional plane preferably extends in particular along the central axis of the air cap and through the center points of the Hornluftauslassöffnungen.

The fact that an external Hornluftausström angle and / or an inner Hornluftausström angle and / or a control bore distance is adjusted in the context of the inventive method to a material flow rate and / or an internal nozzle pressure of the nozzle module, means that external Hornluftausström angle, internal Hornluftausström angle and / or control bore distance depending on a material flow rate and / or a

Nozzle internal pressure must be measured. For example, generates a nozzle module with a first material throughput and / or at a first nozzle internal pressure a spray jet with the specified spray jet cross-sectional height and / or spray jet cross-sectional width and / or spray jet cross-sectional shape, because it has a suitable external Hornluftausström angle, inner Hornluftausström angle and / or Steuererbohrung- At a second, different from the first material flow rate, material flow rate, and / or at a second, different from the first nozzle internal pressure, internal nozzle pressure, the outer Hornluftausström angle, the inner Hornluftausström angle and / or the Steuererbohrung- distance must be changed , so that a spray jet with the specified

Spray jet cross-section height and / or spray jet cross-sectional width and / or

Spray jet cross-sectional shape is achieved. A changed material throughput is particularly present when a material nozzle with a different nozzle size is used. An altered internal nozzle pressure is present in particular if a low-pressure nozzle module and then a high-pressure nozzle module are used first or if a low-pressure main body module and then a high-pressure main body module are used first. However, changes to the air cap may also affect the nozzle internal pressure. An outer Hornluftausström angle, an inner Hornluftausström angle and / or a control bore distance of the air cap are tuned in the context of the present method exactly on the material flow rate and / or the nozzle internal pressure of the nozzle module, so that the nozzle module a spray jet with the fixed, ie desired,

Spray jet cross-sectional shape generated. Preferably, the outer horn air outflow angle of the first horn is equal to the outer horn air outflow angle of the second horn, the inner horn air outflow angle of the first horn is equal to the inner horn air outflow angle of the second horn, and the pilot bore clearance (s) of the second horn Control bores on one side of the central opening are equal to the Steuerbohrung- distance and the control bore intervals of the control bores on the

opposite side of the central opening.

The method according to the invention for selecting a nozzle module from a nozzle set for a painting task described above and in more detail is characterized in that the method comprises at least selecting and / or specifying one or more of the following properties of the painting task: nozzle module previously used a nozzle set according to one of claims 1 to 8, previously used nozzle module of another nozzle set, injection pressure method, spray gun model, spray gun manufacturer, type of medium to be sprayed, viscosity of the medium to be sprayed, recommendation of the manufacturer of the sprayed medium, spray jet, layer thickness, climatic

Condition, painting speed, controllability, nozzle size, and that based on the choice or specification, a proposal for a nozzle module of the nozzle set is generated. The method may include different stages with different options and / or indication options. For example, in a first stage, the choice or indication be provided whether the proposal for a nozzle module of the nozzle set starting from a previously used nozzle module of a nozzle set described above and below, a previously used nozzle module of another nozzle set in that the type of the medium to be sprayed and / or based on the layer thickness to be achieved, in particular the layer thickness to be achieved per spray pass, is to be generated. Depending on the choice or specification, different further properties of the painting task can be selected and / or specified. As the type of medium to be sprayed, for example waterborne paint, solventborne paint, clearcoat or 2-component paint can be selected. As the injection printing method, e.g. Low pressure process, in particular HVLP, or

High-pressure method, in particular Compliant, selectable or be specified. As used Nozzle size may be a single nozzle size, for example 1, 1, 1, 2 or 1, 3, or a

Nozzle size range, for example 1, 0 to 1, 2, 1, 3 to 1, 5, etc. can be selected or specified. The viscosity of the medium to be sprayed may be expressed as a value or viscosity range, e.g. low viscosity, normal or highly viscous, preferably with specification of a range of values, in particular in time in seconds, which takes the material to completely expire from a standardized vessel, in particular from a DIN4 cup, indicate or be selectable. For the desired spray jet shape, e.g. a spraying jet with a cross-section with an at least partially substantially constant width (I-beam) or a spray jet with a cross-section with a substantially oval, in particular substantially elliptical, shape (O-beam) should be indicated or selectable. The climatic conditions may in particular be the temperature and / or the relative humidity in the paint booth in which the nozzle module is to be used. The indication of

Lackiergeschwindigkeit and controllability can preferably be configured as interacting slider, is specified by the whether the user more emphasis on a high coating speed or good controllability of

Application sets. In particular, the sum of the value for the meaning of the coating speed and the value for the significance of controllability can always be 100%. Pushes a user of the method according to the invention the slider for the

Paint speed up, so the slider for controllability automatically shifts down. The division may thus be e.g. 0% coating speed and 100% controllability, if the user only cares about good controllability, it can be 100% coating speed and 0% controllability, if the user only values high painting speed, or 25% coating speed and 75% % Controllability, 50% coating speed and 50% controllability, 75%

Lackiergeschwindigkeit and 25% controllability amount. The indication can be made in particular in 1% steps. The proposal for a nozzle module of the nozzle set, which is generated starting from the choice or indication of the one or more properties of the painting task, is preferably output, in particular displayed. Preferably, the inventive method comprises sending the proposal for a nozzle module of the nozzle set by e-mail or by means of another data transmission system.

The selection system according to the invention, in particular a "slide system", for carrying out a method mentioned above, is characterized in that it contains selection or

Having input means for the properties of the painting task as well as means for generating and displaying a proposal for a nozzle module of the nozzle set. The Selection system can, for example, consist of several mutually displaceable elements, for example of paper or cardboard, which form the selection or input means for the properties of the painting task. Upon complete selection or input of the properties of the painting task, the selection system according to the invention then constitutes the proposal for a nozzle module of the nozzle set.

The computer program product according to the invention is characterized in that it comprises commands which, during the execution of the program by a data processing device, cause it to generate a method or the steps of the selection system described above and in more detail below. In particular, the computer program product according to the invention may have a menu navigation, according to the above and further described below selection system, or the method described above and below for selecting a nozzle module from a nozzle set for a painting task, different stages with different election and / or indication possibilities. For example, in a first stage, the choice or

Be provided indication whether the proposal for a nozzle module of the nozzle set starting from a previously used nozzle module of a nozzle set described above and below, a previously used nozzle module of another nozzle set, the type of medium to be sprayed and / or starting from the layer thickness to be achieved, in particular the layer thickness to be achieved per spray pass should be generated. Depending on the choice or specification, different further menu items may appear, by which

Properties of the painting task can be selected and / or specified. Facts explained above in the context of the description of the method according to the invention can apply to the computer program product according to the invention. The data processing device may be, in particular, a smartphone or a desktop, notebook or tablet computer. The invention

Computer program product can be designed such that the proposal for a nozzle module of the nozzle set, which is generated starting from the choice or indication of the one or more properties of the painting task, issued, in particular is displayed. The computer program product according to the invention is particularly preferably designed such that the proposal for a nozzle module of the nozzle set can be sent by e-mail or by means of another data transmission system.

Advantageous embodiments are the subject of the dependent claims. Preferably, the nozzle set according to the invention comprises at least one further (second) nozzle module group, which comprises at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same base module, wherein the nozzle modules the other nozzle module group are also configured such that they have a different material throughput under the same spraying conditions and the spray steels producible by means of the nozzle modules are essentially the same

Spray jet cross-section height and have the same spray jet cross-sectional width,

In particular, the spray jet cross-sections of the various nozzle modules are congruent, wherein the injectable by means of the nozzle modules of the two nozzle module groups injection streams each have different cross-sectional shapes, in particular such that the means of the nozzle modules of a nozzle module group can be generated Spray steels have a cross-section with at least partially substantially constant width (I-nozzle modules) and the injectable by means of the nozzle modules of the other nozzle module group injection streams have a cross-section with a substantially oval, in particular substantially elliptical shape (O nozzles modules).

The above explanations of the nozzle set according to the invention apply here accordingly.

Like the above-described nozzle module group of the nozzle set according to the invention, which is hereinafter referred to as the first nozzle module group, the further, in particular second, nozzle module group has at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same base module, wherein the nozzle modules of the further nozzle module group are also configured such that they have a different material throughput under the same spraying conditions and substantially producible by means of the nozzle modules injection streams the same spray jet cross-section height and the same

Spray jet cross-section width, in particular the spray jet cross sections of the various nozzle modules are congruent.

Further, by means of the nozzle modules of the two nozzle module groups, ie the first nozzle module group and the other, in particular second, nozzle module group, producible spray steels each have different cross-sectional shapes, in particular such that the means of Nozzle modules of a nozzle module group producible spray streams have a cross-section with at least partially substantially constant width (I-nozzle modules) and the injectable by means of the nozzle modules of the other nozzle module group injection molding a cross section with substantially oval, especially in Essentially elliptical, have shape (O-jet modules). The nozzle modules with

Injection steels having a cross section with an at least partially substantially constant width are referred to below as I-nozzle modules, a spray jet generated by means of an I-nozzle module as an I-beam. The nozzle modules with injection steels with substantially oval, in particular substantially elliptical, shape are referred to below as O-nozzle modules, a spray jet generated by means of an O-nozzle module as an O-beam. An I-beam is characterized by an elongated beam shape with short outflow zones at the top and bottom of the spray pattern, whereby an I-beam is particularly suitable for controlled application, in particular because less paint per surface is applied at a defined coating speed. An O-beam with its essentially oval, especially in the

Essentially elliptical, jet shape has larger run-off zones at the top and bottom of the spray pattern and is especially suitable for rapid application, in particular because at the same coating speed so more color per area is applied as with.

The user of the nozzle set according to the invention can choose by this particular embodiment, the appropriate for his operation beam shape. If the user places more value on good controllability of the application, he chooses one of the I-nozzle modules, he places more emphasis on a high coating speed, so he chooses one of the O-nozzle modules.

Both the first nozzle module group as well as the further, in particular second, nozzle module group has different nozzle modules, which have a different material throughput under the same injection conditions. At the same time, the nozzle modules within a nozzle module group generate the same spray conditions injection lines with substantially the same spray jet cross-sectional height and the same spray jet cross-section width, in particular, the spray jet cross sections of the spray jets produced by the various nozzle modules within a group congruent. Across groups, the spray jet cross-section height, the spray jet cross-sectional width and / or the

Spray jet cross section be different.

Preferably, the nozzle set comprises at least one further (third) nozzle module group, which comprises at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same main body module, wherein the nozzle modules the other nozzle module group are also configured such that they have a different material throughput under the same spraying conditions and the spray steels producible by means of the nozzle modules are essentially the same

Spray jet cross-section height and have the same spray jet cross-sectional width, In particular, the spray jet cross sections of the various nozzle modules are congruent, wherein the nozzle modules of a nozzle module group are configured as low-pressure nozzle modules and the nozzle modules of the further nozzle module group as high-pressure nozzle modules. Spray guns, especially paint spray guns, work with various printing processes. Conventional spray guns operate with relatively high injection pressures of several bars. In so-called HVLP guns, the nozzle internal pressure is a maximum of 10 psi or 0.7 bar, which achieves transfer rates well in excess of 65%. Compliant spray guns, in turn, have a nozzle internal pressure greater than 10 psi or 0.7 bar, but also achieve an override rate of greater than 65%.

The nozzle internal pressure of the spray gun is the pressure which prevails in the air cap of the spray gun. Often the atomizing air area is from

Horn air area separated and in the atomizing air range, there may be a different pressure than in the horn air area. However, the pressures in the atomizing air area and in the horn air area can also be the same. The nozzle internal pressure can, for example, by means of a so-called

Test air cap to be measured. It is a special air cap, which is placed on the spray gun instead of the usual air cap. The Prüffuftkappe usually has two pressure gauge, one of which is connected via a bore in the Prüfluftkappe with the Zerstäuberluftbereich and the other via a further bore in the Prüfluftkappe with the horn air area.

The designations low-pressure nozzle module and high-pressure nozzle module in the present case do not mean that the respective nozzle module only in classical low-pressure or

The use of the respective nozzle module makes the spray gun a classic low-pressure spray gun or, in particular, a HVLP spray gun or a classic high-pressure gun. Rather, this means only that the spray gun, if it is equipped with a high-pressure nozzle module, has a higher nozzle internal pressure than if it is equipped with a low-pressure nozzle module. Preferably, a spray gun equipped with a low-pressure nozzle module or a base module equipped with a low-pressure nozzle module fulfills the criteria of an HVLP spray gun and the spray gun equipped with a high-pressure nozzle module or one with a high-pressure nozzle. Nozzle module equipped base module meets the criteria of a Compliant spray gun. By virtue of the fact that the nozzle modules of one nozzle module group are designed as low-pressure nozzle modules and the nozzle modules of the further nozzle module group are designed as high-pressure nozzle modules, the user can select the nozzle nozzle which is suitable for his method of operation. Select module. If he attaches importance to high transmission rates and thus to a saving of spray material, he chooses one of the low-pressure, in particular HVLP nozzle modules. If he prefers a higher painting speed and / or he has one for the HVLP process, where a higher air volume is required than for Compliant guns, too small

Compressor, he chooses one of the high-pressure, in particular Compliant nozzle modules.

Particularly preferably, they can be generated by means of the low-pressure nozzle modules

Injection streams and the spray steels producible by means of the high-pressure nozzle modules have the same cross-sectional shape, in particular in such a way that the spray steels producible by means of the low-pressure nozzle modules and the spray elements which can be produced by means of the high-pressure nozzle modules have a cross-section with an essentially constant width at least in regions ( I-nozzle modules) or have a cross section with a substantially oval, in particular substantially elliptical, shape (O-nozzle modules). By "equal cross-sectional shape" herein is meant a same basic shape, in particular, the cross-sectional shape with at least partially substantially constant width to a shape, regardless of different spray jet cross-sectional heights, spray jet cross-sectional widths or ratios

Spray jet cross-section height and spray jet cross-section width. Likewise, the cross-sectional shape having a substantially oval, in particular substantially elliptical, shape is a shape regardless of different spray jet cross-sectional heights.

Spray beam cross-section widths or ratios of spray jet cross-section height and spray jet cross-section width.

As a result, a user who prefers an I beam described above has the ability to choose between a low pressure nozzle module and a high pressure nozzle module without sacrificing its preferred beam shape. The same applies to users who prefer an O-beam as described above.

Particularly preferably, the nozzle set has at least two, preferably at least four, different nozzle module groups, wherein the nozzle modules of the nozzle module groups are preferably designed such that each nozzle module of a nozzle module group each have a nozzle Module can be assigned to at least one other nozzle module group (s), which has the same material throughput under the same injection conditions. One of the said nozzle module groups may comprise at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same basic module, the nozzle modules of this nozzle module group all being designed as low-pressure modules. , In particular HVLP nozzle modules and are designed as I-nozzle modules, and their spray steels, in particular spray jet cross-sections, all the same

Spray jet cross-section height, the same spray jet cross-section width and the same

Have spray jet cross-sectional shape, in particular their spray jet cross-sections

are congruent. The individual nozzle modules within the nozzle module group have a different material throughput, in particular different nozzle sizes, in particular different nominal nozzle sizes.

A further of said nozzle module groups may comprise at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same main body module, wherein the nozzle modules of this nozzle module group also all as Low-pressure, in particular HVLP nozzle modules, however, are not designed as I-nozzle modules but as O-nozzle modules, and whose spray streams, in particular spray jet cross-sections, also all have the same spray jet cross-sectional height, the same spray jet cross-sectional width and the same spray jet cross-sectional shape, in particular whose spray jet cross-sections are congruent. The individual nozzle modules within the nozzle module group have a different material throughput, in particular different nozzle sizes, in particular different nominal

Nozzle sizes.

A further of said nozzle module groups may comprise at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same base module, the nozzle modules of this nozzle module group not being low pressure -, In particular HVLP nozzle modules, but as high-pressure particular Compliant nozzle modules and also configured as O-nozzle modules, and their spray steels, in particular spray jet sections, also all the same spray jet cross-section height, the same spray jet cross-sectional width and the same

are congruent. The individual nozzle modules within the nozzle module group have a different material throughput, in particular different nozzle sizes, in particular different nominal nozzle sizes. Another of said nozzle module groups may comprise at least two, preferably at least four, different nozzle modules for optional attachment in or on one and the same basic module, wherein the nozzle modules of this nozzle module group also as high pressure - In particular Compliant nozzle modules, but not as O-nozzle modules, but as I-nozzle modules are designed, and sprayed, especially spray jet, also all the same spray jet cross-section height, the same spray jet cross-sectional width and the same spray jet cross-sectional shape, in particular whose spray jet cross-sections are congruent. The individual nozzle modules within the nozzle module group have a different material throughput, in particular different nozzle sizes, in particular different nominal

Nozzle sizes.

The individual nozzle module groups can also each consist of a single nozzle and form a nozzle set or they can be combined with any other nozzle module group and thus form a nozzle set. For example, the nozzle module group referred to above as the second nozzle module group may also exist without the above-mentioned nozzle module group and form a nozzle set alone, or the second nozzle module group and the third and / or fourth nozzles Module group can form a nozzle set, even without the first nozzle module group. Also, the third and fourth nozzle module groups may together form a nozzle set even without the first and second nozzle module groups. That the nozzle modules of the nozzle module groups are preferably designed such that each nozzle module of a nozzle module group, a nozzle module at least one other nozzle module group (s) is assigned, which under the same injection conditions has the same material throughput means that, for example, in at least two of the nozzle module groups, a nozzle module has a material throughput of 150 g / min. Particularly preferably, the nozzle modules of the nozzle module groups are configured such that each nozzle module of a nozzle module group is in each case a nozzle module of at least one other nozzle module group (s) can be assigned, which is the same Nozzle size, in particular has the same nominal nozzle size. For example, at least two, preferably four, of the nozzle module groups may include a 1-liter nozzle module, a 1, 2-nozzle module, a 1, 3-nozzle module, and a 1, 4-nozzle module ,

Preferably, the nozzle modules of a nozzle set according to the invention each comprise at least one air cap, each having at least two horns, each having at least one inner Hornluftauslassöffnung and an outer Hornluftauslassöffnung, said from At least one outer Hornluftauslassöffnung each horn air at a certain outer Hornluftausström-angle flows relative to a Lot axis, wherein the Lot axis is perpendicular to a central axis of the first air cap, wherein from the at least one inner Hornluftauslassöffnung each horn air in a certain inner Hornluftausström- Angle relative to the Lot axis flows out, and in the various nozzle modules of at least one nozzle module group, the sums of external Hornluftausström angle and inner Hornluftausström angle within a nozzle module are different.

The above explanations of the method according to the invention for designing a nozzle module apply accordingly here. For example, in a first nozzle module of a nozzle module group, if the outer horn air discharge angle relative to the plumb line is 16 ° and the inner horn exit air angle relative to the plumb line 21 is 5 °, the sum of external horn air discharge Angle and internal Hornluftausström angle 37.5 °. For example, in a second nozzle module of the same nozzle module group, the outer horn air discharge angle relative to the Lot axis is 17 ° and the inner Hornluftausström angle relative to the Lot axis 22 ° so the sum of Hornluftausström external angle and inner Horn air outlet angle 39 °. To change the sum of outer

Of course, not only the outer horn air discharge angle and the inner horn air discharge angle need to change, but it is sufficient to change one of the angles. Particularly preferably, the sum of external Hornluftausström-angle and inner increases

Hornluftausström angle with increasing material throughput. In particular, for the HVLP nozzle modules with I-beam, the said sum can be between 37 ° and 44 °, for the HVLP nozzle modules with O-beam between 36 ° and 41.5 °, for the Compliant nozzle modules with I-beam between 44 ° and 46.5 ° and for the Compliant nozzle modules with O-beam between 44.5 ° and 48.5 °.

Preferably, the nozzle modules of a nozzle set according to the invention each have at least one air cap, each with at least one central opening and at least two control bores, wherein the control bores on opposite sides of the at least one central opening, in particular diametrically to each other, and in a certain control bore distance to the at least one central opening are arranged, characterized in that the control bore spacing is different in the different nozzle modules of at least one nozzle module group. The above explanations of the method according to the invention for designing a nozzle module apply here accordingly, in particular the explanations regarding the number and arrangement of the control bores and the measurement of the control bore spacing between control bores and central opening. The nozzle modules of a nozzle set according to the invention preferably each have at least one material nozzle with a substantially hollow cylindrical front section and a material outlet opening, wherein the inner diameter of the material outlet opening and / or the axial extension of the substantially hollow cylindrical front section of

Material nozzle are different in the different nozzle modules of at least one nozzle module group. In particular, a different material throughput is achieved.

Preferably, the nozzle modules of a nozzle module group of a nozzle set according to the invention are designed such that the material throughput between successive nozzle modules with increasing material throughput each by an equidistant value, preferably by a value of between 10 to 20 g / min in the Special by a value of 15 g / min, increases. This means that a nozzle module group has, for example, a 1, 2-nozzle module and a 1, 3-nozzle module, wherein the 1, 2-nozzle module and the 1, 3-nozzle module with increasing Material throughput follow each other, that is within the nozzle module group has the 1, 3-nozzle to the 1, 2-nozzle next higher

Material throughput, which means that no nozzle module within the nozzle module group has a material throughput that is between the material throughput of the 1, 2-nozzle module and the material throughput of the 1, 3-nozzle module, and wherein the 1 , 3-nozzle under the same spraying conditions has a by 10 to 20 g / min, preferably 15 g / min greater material throughput. Particularly preferably, a nozzle module group has at least four nozzle modules, which are designed such that the material throughput between the same with increasing material throughput nozzle modules at the same

Spray conditions in each case by an equidistant value, preferably by a value of between 10 to 20 g / min, in particular by a value of 15 g / min, increases. A nozzle module group has, for example, a 1, 1, 1, 2, 1, 3 and 1, 4 nozzle modules, which follow one another as the material throughput increases, for example, the material throughput of FIG 1 er nozzle 135 g / min, the material throughput of the 1, 2 nozzle 150 g / min, the material throughput of the 1, 3 nozzle 165 g / min and the material flow rate of the 1, 4 nozzle 180 g / min. Such a uniformly increasing material throughput with increasing nozzle size is very advantageous for the user. The method according to the invention for designing a nozzle module preferably comprises the production of the nozzle module. Most preferably, it also includes delivering the nozzle module to the customer and using the nozzle module.

The invention will be explained in more detail by way of example with reference to FIG. 5. 1 shows a schematic representation of an injection process;

2 shows a diagram with a schematic exemplary layer thickness profile over the height of the spray pattern;

3 shows a table with exemplary nozzle modules of different nozzle module groups of an embodiment of a nozzle set according to the invention; Fig. 4 is a sectional view of a first air cap of a nozzle module of a

Embodiment of a nozzle set according to the invention and

Fig. 5 is a sectional view of a second air cap of another nozzle module of a

Embodiment of a nozzle set according to the invention.

Fig. 1 shows schematically how a spray jet or a spray pattern 3 by means of a spray gun 1, which in the present case is designed as a pulverized air spray gun, is generated. The spray gun 1 comprises in particular a main body module 1 1 and a nozzle module 15, which is arranged on the main body module 1 1. In the present example, the nozzle module 15, or the spray gun 1 with the nozzle module 15, generates an O-beam described above, but the situation for an I-beam is essentially the same. The figure shows no real view, but the spray gun 1 is shown in a side view and the spray pattern 3 in a front view of the spray pattern 3. The dashed lines illustrate the upper and lower outer limits of the spray jet generated and the upper and lower

External boundaries of the core of the spray jet. The spray jet generated when hitting a flat object which is perpendicular to the longitudinal axis Z and at a spray distance d to the nozzle, in particular the front end of a material nozzle, the spray gun is arranged, the spray pattern 3 with its spray jet outer region 7 and core or core region. The

External boundary of the spray jet outer region 7 and the transition between

Spray jet outer region 7 and core region 5 are fluid. However, at least the core area 5 is usually easy to identify and measure in real spray patterns. The core region 5 has a certain height and a certain width, present as

Spray jet cross-section height h and spray jet cross-section width b are designated. In the The longitudinal axis Z is in this case a longitudinal axis of the upper part of the

Spray gun 1, a spray axis, a nozzle longitudinal axis or a central axis of a

Air cap.

The spray jet 3 shown in Fig. 2 is shown rotated in relation to the illustration in Fig. 1 by 90 °. 2 shows schematically an exemplary layer thickness profile over the

Height of the total spray jet. The diagram with its graph 9 first shows a relatively shallow increase in the layer thickness in μιη in the spray jet outer region 7. In the core region 5, the layer thickness increases sharply, reaches its maximum and then drops off sharply again. In the spray jet outer region 7 of the graph 9 flattens again. The distance between the

Measuring points that form the X-axis of the diagram, in the present case is not equal to 1 cm.

3 shows a table with different exemplary nozzle modules of different nozzle-module groups 10, 20, 30, 40 of an exemplary embodiment of a nozzle set according to the invention. The individual nozzle module groups 10, 20, 30, 40 are each outlined in bold in the table. In the present case, the first nozzle module group 10 comprises five nozzle modules with different nozzle sizes, in particular different nominal nozzle sizes. The material throughput of the five nozzle modules within the nozzle module group 10 increases from one nozzle size to the next by an equidistant value, namely 15 g / min. The 1, 1 erDüsen module has a material throughput of 135 g / min, the 1, 2-nozzle module, a material throughput of 150 g / min, the 1, 3-nozzle module, a material throughput of 165 g / min, the 1 , 4-nozzle module has a material throughput of 180 g / min and the 1, 5-nozzle module a material throughput of 195 g / min. All nozzle modules within the nozzle module group 10 are designated as HVLP, i. designed as low-pressure nozzle modules, and all the nozzle modules have the same spray jet cross-section height and the same

Spray jet cross-section width, wherein, as already mentioned above, so that each

Spray jet cross-sectional height h and spray jet cross-sectional width b of one illustrated in Fig. 1 and Fig. 2 core region 5 is meant. Preferably, the spray jet cross sections, i. the core regions 5 of the spray patterns generated by the nozzle modules within the nozzle module group 10 are congruent, i. they have the same shape and size. Only the layer thickness of the core region 5 of the spray pattern would be due to the different

Material throughput different. The spray jet cross-section height and

Spray jet cross-sectional width of the nozzle modules of the nozzle module group 10 serve as a reference for the spray jet cross-sectional heights and spray jet cross-sectional widths of the nozzle modules of the other nozzle module groups and are therefore each represented by 100%. The nozzle modules of the nozzle module group 10 are as described above O-nozzle modules configured, ie they each produce a spray jet whose cross-section has a substantially oval, in particular substantially elliptical, shape.

The user of an embodiment of a nozzle set according to the invention, which comprises at least two nozzle modules of the nozzle module group 10, can thus use the

Change nozzle size of his spray gun, i. he can do that at the base module of the

Spray gun arranged first nozzle module with a first nozzle size, in particular nominal nozzle size, remove and another nozzle module of the nozzle module group 10 with a different nozzle size, in particular nominal nozzle size, arrange on the same main body module, and receives a spray jet same spray jet cross-section height, spray jet cross-section width and spray jet cross-sectional shape at a defined changed

Material throughput.

In the present case, another nozzle module group 20 also includes five nozzle modules with different nozzle sizes, in particular different nominal nozzle sizes. The material flow rate of the five nozzle modules within the nozzle module group 20 increases from one nozzle size to the next by an equidistant value, namely 15 g / min. The 1, 1 erDüsen module has a material throughput of 135 g / min, the 1, 2-nozzle module, a material throughput of 150 g / min, the 1, 3-nozzle module, a material throughput of 165 g / min, the 1 , 4-nozzle module has a material throughput of 180 g / min and the 1, 5-nozzle module a material throughput of 195 g / min. All nozzle modules within the nozzle module group 20 are designated as HVLP, i. designed as low-pressure nozzle modules, and all the nozzle modules have the same spray jet cross-section height and the same

Spray jet cross-section width, wherein here, as already mentioned above, so in each case the spray jet cross-sectional height h and spray jet cross-section width b of a core region 5 illustrated in Fig. 1 and Fig. 2 is meant. Preferably, the spray jet cross sections, i. the core regions 5 of the spray patterns generated by the nozzle modules within the nozzle module group 20, congruent, i. they have the same shape and size. Only the layer thickness of the core region 5 of the spray pattern would be due to the different

Material throughput different. The spray jet cross-sectional height of the nozzle modules of the nozzle module group 20 is greater than the spray jet cross-sectional height of the nozzle modules of the nozzle module group 10, in the present example by 6% greater. The

Spray jet cross-sectional width of the nozzle modules of the nozzle module group 20, however, is smaller than the spray jet cross-sectional width of the nozzle modules of the nozzle module group 10, in the present example, 88% of the spray jet cross-sectional width of the nozzle modules of the nozzle module group 10th The nozzle modules of the nozzle module group 20 are as above designed I-nozzle modules configured, ie they each produce a spray jet whose cross section has at least partially a substantially constant width.

The user of an embodiment of a nozzle set according to the invention, which comprises at least two nozzle modules of the nozzle module group 20, can thus use the

Spray gun arranged first nozzle module with a first nozzle size, in particular nominal nozzle size, remove and another nozzle module of the nozzle module group 20 with a different nozzle size, in particular nominal nozzle size, on the same basic module to arrange, and receives a spray jet with same spray jet cross-section height, spray jet cross-section width and spray jet cross-sectional shape at a defined changed

Material throughput.

In the present case, another nozzle module group 30 also includes five nozzle modules with different nozzle sizes, in particular different nominal nozzle sizes. The material flow rate of the five nozzle modules within the nozzle module group 30 increases from one nozzle size to the next by an equidistant value, namely 15 g / min. The 1, 1 erDüsen module has a material throughput of 155 g / min, the 1, 2-nozzle module, a material throughput of 170 g / min, the 1, 3-nozzle module, a material throughput of 185 g / min, the 1 The 4-nozzle module has a material throughput of 200 g / min and the 1.5-nozzle module has a material throughput of 215 g / min. All nozzle modules within the nozzle module group 30 are shown as compliant, i. According to the above understanding, designed as high-pressure nozzle modules, and all nozzle modules have the same spray jet cross-section height and the same spray jet cross-section width, in which case, as already mentioned above, each of the spray jet cross-sectional height h and spray jet cross-sectional width b of a in Fig. 1 and Fig. 2 illustrated core region 5 is meant. Preferably, the spray jet cross sections, i. the core regions 5 of the spray images generated by the nozzle modules within the nozzle module group 30, congruent, i. they have the same shape and size. Only the layer thickness of the core region 5 of the spray pattern would be due to the different

Material throughput different. The spray jet cross-sectional height of the nozzle modules of the nozzle module group 30 is greater than the spray jet cross-sectional height of the nozzle modules of the nozzle module group 10, 15% larger in the present example. The

Spray jet cross-sectional width of the nozzle modules of the nozzle module group 30 is equal to the spray jet cross-sectional width of the nozzle modules of the nozzle module group 10. The nozzle modules of the nozzle module group 30 are configured as O-nozzle modules described above, ie they each produce a spray jet whose cross-section has a substantially oval, in particular substantially elliptical shape.

The user of an embodiment of a nozzle set according to the invention, which comprises at least two nozzle modules of the nozzle module group 30, can thus use the

Spray gun arranged first nozzle module with a first nozzle size, in particular nominal nozzle size, remove and another nozzle module of the nozzle module group 30 with a different nozzle size, in particular nominal nozzle size, arrange on the same basic module and receives a spray jet same spray jet cross-section height, spray jet cross-section width and spray jet cross-sectional shape at a defined changed

Material throughput.

In the present case, another nozzle module group 40 likewise includes five nozzle modules with different nozzle sizes, in particular different nominal nozzle sizes. The material flow rate of the five nozzle modules within the nozzle module group 40 increases from one nozzle size to the next by an equidistant value, namely 15 g / min. The 1, 1 erDüsen module has a material throughput of 155 g / min, the 1, 2 nozzle module, a material throughput of 170 g / min, the 1, 3-nozzle module, a material throughput of 185 g / min, the 1 The 4-nozzle module has a material throughput of 200 g / min and the 1.5-nozzle module has a material throughput of 215 g / min. All nozzle modules within the nozzle module group 40 are shown as compliant, i. According to the above understanding, designed as high-pressure nozzle modules, and all nozzle modules have the same spray jet cross-section height and the same spray jet cross-section width, in which case, as already mentioned above, each of the spray jet cross-sectional height h and spray jet cross-sectional width b of a in Fig. 1 and Fig. 2 illustrated core region 5 is meant. Preferably, the spray jet cross sections, i. the core regions 5 of the spray patterns generated by the nozzle modules within the nozzle module group 40, congruent, i. they have the same shape and size. Only the layer thickness of the core region 5 of the spray pattern would be due to the different

Material throughput different. The spray jet cross-sectional height of the nozzle modules of the nozzle module group 40 is greater than the spray jet cross-sectional height of the nozzle modules of the nozzle module group 10, 20% larger in the present example. The

Spray jet cross-sectional width of the nozzle modules of the nozzle module group 40, however, is smaller than the spray jet cross-sectional width of the nozzle modules of the nozzle module group 10, in the present example, 88% of the spray jet cross-sectional width of the nozzle modules of the nozzle module group 10th The nozzle modules of the nozzle module group 40 are as above designed I-nozzle modules configured, ie they each produce a spray jet whose cross section has at least partially a substantially constant width.

The user of one embodiment of a nozzle set according to the invention, which comprises at least two nozzle modules of the nozzle module group 40, can thus use the

Spray nozzle arranged first nozzle module with a first nozzle size, in particular nominal nozzle size, remove and another nozzle modules of the nozzle module group 40 with a different nozzle size, in particular nominal nozzle size, the same

Arrange the main body module, and receives a spray jet with the same

Spray jet cross-section height, spray jet cross-section width and spray jet cross-sectional shape with a defined changed material throughput.

An inventive nozzle set for a spray gun, in particular a

air atomizing paint spray gun, may comprise at least two, preferably at least four, different nozzle modules from the same nozzle module group for optional mounting in or on one and the same base module of a spray gun, which brings the said advantages to the user.

However, a nozzle set according to the invention may additionally comprise in each case at least two, preferably at least four, different nozzle modules from one or more other nozzle module groups for optional attachment in or on one and the same base module. For example, a nozzle set according to the invention may comprise at least two, preferably at least four, different nozzle modules from the nozzle module group 10 and at least two, preferably at least four, different nozzle modules from the nozzle module group 20 and / or at least two, Preferably, at least four, different nozzle modules from the nozzle module group 30 and / or at least two, preferably at least four, different nozzle modules from the nozzle module group 40 include.

An inventive nozzle set may alternatively comprise, for example, at least two, preferably at least four, different nozzle modules from the nozzle module group 20 and at least two, preferably at least four, different nozzle modules from the nozzle module group 30 and / or at least two , preferably at least four, comprise different nozzle modules from the nozzle module group 40.

An inventive nozzle set may alternatively, for example, at least two, preferably at least four, different nozzle modules from the nozzle module group 30 and at least two, preferably at least four, different nozzle modules from the nozzle module group 40 include.

A nozzle set according to the invention may preferably comprise at least two, preferably at least four, different nozzle modules from three different nozzle module groups, but more preferably a nozzle set according to the invention comprises at least two, preferably at least four, different nozzle modules from all four different nozzle modules. module groups.

Preferably, each of the various nozzle modules from the various nozzle module groups can be arranged exchangeably on one and the same main body module. For this purpose, all the nozzle modules from the different nozzle module groups particularly preferably have the same connection.

From the table it can be seen that each nozzle module of a nozzle module group in each nozzle module of at least one other nozzle module group can be assigned to the nozzle set according to the invention, which has the same material throughput under the same injection conditions. In particular, within a spray printing process, the nozzle modules with the same nozzle size have the same material throughput. For example, the 1, 1 HVLP-O nozzle module has the same material throughput of 135 g / min as the 1, 1 HVLP-I nozzle module, the 1, 2 HVLP-O-nozzle module the same material throughput like the 1, 2 HVLP I nozzle module and so on. The same applies to the Compliant nozzle modules. For example, the 1.1 compliant O-die module has the same material throughput of 155 g / min as the 1.1

Compliant I-Nozzle Module, the 1, 2-Compliant-O-Nozzle Module has the same material throughput as the 1, 2-Compliant-I-Nozzle module and so on.

The table also shows that the spray steels producible by means of the low-pressure, in this case HVLP nozzle modules and the spray steels which can be produced by means of the high-pressure, in this case compliant nozzle modules, can have the same cross-sectional shape, in particular in such a way that the Low-pressure nozzle modules and the spray steels that can be generated by means of the high-pressure nozzle modules have a cross-section with at least partially substantially constant width (I-nozzle modules) or a cross section with a substantially oval, in particular substantially elliptical, shape (O nozzles modules). As a result, the user can, for example, exchange a nozzle module from the nozzle module group 10 for a nozzle module from the nozzle module group 30, and thus from the low-pressure, in particular HVLP, injection molding method to the high-pressure, in particular compliant, injection method without having to forego the ideal O-beam for its operation. Accordingly, the user can exchange a nozzle module from the nozzle module group 20 for a nozzle module from the nozzle module group 40, and so from the low pressure, in particular HVLP injection method for high-pressure, in particular Compliant injection method change, without having to give up the ideal for his work I beam. In addition to the advantages mentioned above, the present nozzle set according to the invention has the further advantage that the user can, for example, exchange a nozzle module from the nozzle module group 10 for a nozzle module from the nozzle module group 20, and thus a nozzle Module which generates an O-beam, with which a quick application is possible, can replace by a nozzle module which produces an even more controllable I-beam, without having to give up the desired HVLP injection printing process and in particular without changes to have to accept in the material throughput. Accordingly, a change from a nozzle module from the nozzle module group 30 to a nozzle module from the nozzle module group 40 is possible without having to forego the desired Compliant injection pressure method and in particular without changes in the material throughput in To have to buy. Of course, reversed changes are possible.

With the nozzle set according to the invention, the user can select the nozzle module which is ideal for his painting task and his mode of operation. In general, a selection of the ideal nozzle module based on various factors is possible, in particular based on the previously used nozzle module of a nozzle set according to the invention, the previously used nozzle module of another nozzle set, the desired injection pressure method, the spray gun model to be used, the manufacturer to be used spray gun, the type of the medium to be sprayed, the viscosity of the medium to be sprayed, the

Recommendation of the manufacturer of the sprayed medium, the desired spray jet shape, the required layer thickness, the climatic conditions, in particular the temperature and the relative humidity within the spray booth, based on whether the user has greater importance on the coating speed or good controllability of the

Application sets, and / or on the desired nozzle size. In this selection are

in particular the method according to the invention for selecting a nozzle module from a nozzle set for a painting task, the selection system according to the invention and / or the computer program product according to the invention are helpful.

Fig. 4 shows a sectional view of a first air cap 55 of a nozzle module of a

Embodiment of a nozzle set according to the invention. The air cap 55 has a first horn 68 and a second horn 70. A perpendicular axis L is perpendicular to the central axis Z of first air cap 55, wherein the central axis Z passes through the center of the central opening 80. The central axis A of an outer Hornluftauslasskanals 57 includes with the solder axis L a certain angle and the central axis B of an inner Hornluftauslasskanals 59 includes with the solder axis L a further angle. In the present embodiment, it can be assumed that the main part of the horn air coming from the outer

Hornluftauslassöffnung 57 a of the outer Hornluftauslasskanals 57 flows, the central axis A of the outer Hornluftauslasskanals 57 follows, or that the center of this horn air jet is located on the central axis A of the outer Hornluftauslasskanals 57. Likewise can of it

be assumed that the main part of the horn air coming from the inner

Horn air outlet opening 59a of the inner Hornluftauslasskanals 59 flows, the central axis B of the inner Hornluftauslasskanals 59 follows, or that the center of this horn air jet on the central axis B of the inner Hornluftauslasskanals 59 is located. The angle enclosing the central axis A of the outer Hornluftauslasskanals 57 with the Lot axis L can therefore be considered as outer Hornluftausström angle W1 and the angle to the central axis B of the inner

Hornluftauslasskanals 59 with the Lot axis L includes may be considered as inner Hornluftausström- angle W3. Preferably, the horn air outlet channels of the second horn 70 opposite the said horn air outlet channels include the same angles with the solder axis L.

Also visible in FIG. 4 are outer control bore 61 and inner control bore 63 which have an outer pilot bore clearance Y7 and an inner pilot bore clearance Y9 to the central axis Z of the first air cap 55.

Fig. 5 is a sectional view of a second air cap 155 of another nozzle module of an embodiment of a nozzle set according to the invention. The air cap 155 has a first horn 168 and a second horn 170. The perpendicular axis L is also perpendicular to the central axis Z of the second air cap 155, the central axis Z passing through the center of the central opening 180. The central axis C of an outer Hornluftauslasskanals 157 includes with the solder axis L a certain angle and the central axis D of an inner Hornluftauslasskanals 159 includes with the solder axis L a further angle. Also, in the present embodiment, it can be considered that the main part of the horn air flowing out of the outer horn air outlet port 157a of the outer horn air outlet passage 157 follows the central axis C of the outer horn air outlet passage 157, or the center of this horn air jet on the central axis C of the outer Hornluftauslasskanals 157 is located. Also, it can be considered that the main part of the horn air flowing out of the inner horn air outlet port 159a of the inner horn air outlet port 159 is the Central axis D of the inner Hornluftauslasskanals 159 follows, or that the center of this horn air jet is located on the central axis D of the inner Hornluftauslasskanals 159. The angle subtended by the central axis C of an outer horn air outlet passage 157 having the Lot axis L may therefore be considered to be the outer Hornluftausström angle W101 and the angle the central axis D of an inner Hornluftauslasskanal 159 with the Lot axis L may include as inner Hornluftausström angle W103 apply. Preferably, the horn air outlet channels of the second horn 170 opposite the said horn air outlet channels include the same angles with the solder axis L.

In Fig. 5 also shows an outer control bore 161, which has an outer

Control bore distance Y107 to the central axis Z of the second air cap 155 has. Because the

Control bores are arranged in the form of a triangle in this air cap 155, wherein a tip of the triangle is aligned in the direction of the inner or outer Hornluftauslassöffnungen, i. only the control bore 161 forming the apex of the triangle is in line with the inner horn air outlet opening 159a, the outer horn air outlet opening 157a and the center of the central opening 180 in the air cap 155, and the cutting plane only through the control bore 161, the inner horn air outlet opening 159a and the outer Hornluftauslassöffnung 157a runs, the two other control bores on one side of the central opening 180 and the other two control bores on the other side of the central opening 180 are not visible, but in the present case only indicated by their central axes. The inner control bore clearance Y109 is the distance between the

Central axis Z and an axis parallel to this central axis Z by a projection of the center of the corresponding control bore on the cutting plane.

For a nozzle module with the air cap 55, the sum of the angles W1 and W3 may be different than the sum of the angles W101 and W103 for another nozzle module with the air cap 155. The nozzle modules may be of the same nozzle module group belong.

It should finally be noted that the described embodiments describe only a limited selection of possible embodiments and thus no

Restricting the present invention.

Claims

claims

1 . Nozzle set for a spray gun (1), in particular a compressed air atomizing

Spray gun, comprising at least one nozzle module group (10, 20, 30, 40) with at least two, preferably at least four, different nozzle modules (15) for optional attachment in or on one and the same base module (1 1 ) of a spray gun (1), characterized in that the nozzle modules (15) are designed such that they have a different material throughput under the same spraying conditions, whereby the spray steels which can be generated by means of the nozzle modules (15) have substantially the same spray jet cross-sectional height ( h) and have the same spray jet cross-section width (b), in particular the spray jet cross-sections of the various nozzle modules (15) are congruent.

2. Nozzle set according to claim 1, characterized in that further comprises the nozzle set

at least one further (second) nozzle module group (10, 20, 30, 40), which at least two, preferably at least four, different nozzle modules (15) for optional mounting in or on one and the same base module (1 1), wherein the nozzle modules (15) of the further nozzle module group (10, 20, 30, 40) are also designed such that they have a different material throughput under the same injection conditions and the means of the nozzle Module (15) producible spray steels substantially the same spray jet cross-sectional height (h) and the same

Spray jet cross-section width (b) have, in particular the spray jet cross-sections of the various nozzle modules are congruent, wherein the by means of the nozzle modules (15) of the two nozzle module groups (10, 20, 30, 40) producible spray steels each have different cross-sectional shapes, in particular in such a way that the spray steels which can be generated by means of the nozzle modules of a nozzle module group (20, 40) have a cross-section with an essentially constant width at least in some areas (I-nozzle modules) and which by means of the nozzle modules (15 ) of the other nozzle module group (10, 30) producible spray steels have a cross-section with a substantially oval, in particular substantially elliptical shape (O-nozzle modules).

3. Nozzle set according to claim 1 or 2, characterized in that further comprises the nozzle set at least one further (third) nozzle module group (10, 20, 30, 40), which at least two, preferably at least four, different nozzle modules (15) for optional mounting in or on one and the same basic module (1 1), wherein the nozzle modules (15) of the further nozzle module group (10, 20, 30, 40) are likewise designed such that they have a different material throughput under the same injection conditions and the spray steels producible by means of the nozzle modules (15) essentially the same spray jet cross-section height (h) and the same

In particular, the spray jet cross-sections of the various nozzle modules (15) are congruent, the nozzle modules (15) of a nozzle module group (10, 20) as low-pressure nozzle modules and the nozzle Modules of the further nozzle module group (30, 40) are designed as high-pressure nozzle modules.

4. Nozzle set according to claim 3, characterized in that the producible by means of the low-pressure nozzle modules injection streams and producible by means of high-pressure nozzle modules injection streams have the same cross-sectional shape, in particular such that the means of the low-pressure nozzle modules and the spray steels which can be generated by means of the high-pressure nozzle modules have a cross-section with an essentially constant width at least in some areas (I-nozzle modules) or have a cross-section with a substantially oval, in particular substantially elliptical, shape (O-nozzle modules).

5. nozzle set according to one of the preceding claims, characterized in that the

Nozzle set at least two, preferably at least four, different nozzle module groups (10, 20, 30, 40), wherein the nozzle modules (15) of the nozzle module groups (10, 20, 30, 40) preferably such are configured such that each nozzle module (15) of a nozzle module group (10, 30) each a nozzle module (15) of at least one other nozzle module group (s) (20, 40) can be assigned, which has the same material throughput at the same spraying conditions.

6. nozzle set according to one of the preceding claims, characterized in that the

Nozzle modules (15) each comprise at least one air cap (55, 155) each having at least two horns (68, 70, 168, 170) each having at least one inner Hornluftauslassöffnung (59a, 159a) and an outer Hornluftauslassöffnung (57a, 157a) in which at least one outer horn air outlet opening (57a, 157a) in each case discharges horn air at a specific external horn air outlet angle (W1, W101) relative to a perpendicular axis (L), the perpendicular axis (L) being directed to a central axis ( Z) of the air cap (55, 155) is perpendicular, wherein from the at least one inner Hornluftauslassöffnung (59a, 159a) respectively horn air at a certain inner Hornluftausström angle (W3, W103) flows relative to the Lot axis (L), and in the various nozzle modules (15) of at least one nozzle module group (10, 20, 30, 40) the sums of external Horn Luftausström angle (W1, W101) and inner Hornluftausström angle (W3, W103) within a nozzle module (15) are different.

7. nozzle set according to one of the preceding claims, characterized in that the

Nozzle modules (15) each having at least one air cap (55, 155) each having at least one central opening (80, 180) and at least two control bores (61, 63, 161, 163), wherein the control bores (61, 63, 161, 163) on opposite sides of the at least one central opening (80, 180), in particular diametrally opposite one another, and at a certain control bore spacing (Y7, Y9, Y107, Y109) to the at least one central opening (80, 180). are arranged, characterized in that the

Control bore distance (Y7, Y9, Y107, Y109) in the various nozzle modules (15) of at least one nozzle module group (10, 20, 30, 40) is different.

8. Nozzle set according to one of the preceding claims, characterized in that the nozzle modules (15) each have at least one material nozzle having a substantially hollow cylindrical front portion and a Materialauslassöffnung, wherein the inner diameter of the Materialauslassöffnung and / or the axial extent of the Essentially hollow cylindrical front section of the material nozzle at the

different nozzle modules (15) of at least one nozzle module group (10, 20, 30, 40) are different.

9. nozzle set according to one of the preceding claims, characterized in that the

Nozzle modules of a nozzle module group (10, 20, 30, 40) are designed such that the material throughput between consecutive with increasing material throughput nozzle modules (15) under the same spray conditions by an equidistant value, preferably by one value from between 10 to 20 g / min, in

Special by a value of 15 g / min, increases.

10. spray gun system, characterized in that it comprises at least one nozzle set according to one of the claims of the preceding claims and a base module (1 1), wherein the nozzle modules (15) of the nozzle set interchangeable on the main body module (1 1) can be arranged are.

1 1. Method for designing a nozzle module (15), in particular a nozzle module (15) for a nozzle set according to one of claims 1 to 9, characterized in that the method comprises at least the following steps: Determining at least one spray jet cross-sectional height (h) and / or one spray jet cross-sectional width (b) and / or one spray jet cross-sectional shape of a spray jet to be generated by the nozzle module (15),

Constructing the nozzle module (15) which produces a spray jet having the predetermined spray jet cross-sectional height (h) and / or spray jet cross-sectional width (b) and / or spray jet cross-sectional shape, the method comprising constructing an air cap (55, 155), particularly fitting an outer one

Hornluftausström angle (W1, W101) and / or an inner Hornluftausström angle (W3, W103) and / or a control bore spacing (Y7, Y9, Y107, Y109) to a material flow rate and / or a nozzle internal pressure of the nozzle module (15), wherein the outer horn air discharge angle (W1, W101) is the angle at which horn air from an outer horn air opening (57a, 157a) of the air cap (55, 155) relative to a lot axis (L ), wherein the solder axis (L) is perpendicular to a central axis (Z) of the air cap (55, 155), wherein it is in the inner

Hornluftausström angle (W3, W103) is the angle at which horn air from an inner Hornluftauslassöffnung (59a, 159a) of the air cap (55, 155) relative to the Lot axis (L) flows out, and wherein the control bore Distance (Y7, Y9, Y107, Y109) is the distance between at least one control bore (61, 63, 161, 163) in the air cap and a central opening (80, 180) in the air cap (55, 155).

12. The method of claim 1 1, characterized in that the method comprises the production of the nozzle module (15).

13. A method for selecting a nozzle module (15) from a nozzle set according to one of claims 1 to 9 for a painting task, characterized in that the method at least selecting and / or indicating one or more of the following

Characteristics of the coating task comprises: previously used nozzle module of a nozzle set according to one of claims 1 to 9, previously used nozzle module of another nozzle set, injection pressure method, spray gun model, spray gun manufacturer, type of medium to be sprayed, viscosity of the medium to be sprayed,

Recommendation of the manufacturer of the medium to be sprayed, spray jet shape, layer thickness, climatic condition, painting speed, controllability, nozzle size, and that starting from the choice or specification, a proposal for a nozzle module of the nozzle set is generated.

14. Selection system, in particular a "slide system", for carrying out a method according to claim 13, characterized in that it selection or input means for the properties of the painting task and means for generating and displaying a proposal for a nozzle module (15) of Has nozzle set.

Computer program product, characterized in that it comprises instructions which, when a program is executed by the computer, cause it to generate a method / steps of the selection system according to claim 14.