EP2835179A1 - Nozzle adjustment aid for a fluid spray nozzle, method for improving the spraying and use of the assembly and the objects treated therein - Google Patents

Abstract

The invention relates to a Düseneinstellhilfe (A) for a Flüssigkeitsssprühdüse (B) for testing, positioning or / and adjusting at least one nozzle for spraying in systems of surface technology, wherein the Düseneinstellhilfe a nozzle adapter (F) and at least two positioned and aligned light sources (M) with sharp focusing and / or with focusing, by means of which at least two light beams approximately along the nozzle center line and / or approximately along at least one edge line at the edge of the theoretical spray area (C) or approximately along at least two preferably opposite Edge lines can be generated, which should essentially indicate the location and size of the theoretical spray area (C). The invention also relates to a method for improving the spraying in a system of surface technology, in which a nozzle setting aid (A) according to the invention is used for testing, positioning or / and adjusting at least one nozzle in a surface treatment plant.

Description

The invention relates to a Düseneinstellhilfe for a Flüssigkeitsssprühdüse for testing, positioning and / or adjusting a spray nozzle in particular with respect to spray direction and / or spray angle and methods for improving the spraying in a plant of surface technology and the use of a system of surface technology with improved adjusted nozzles and Use of the objects treated in this Annex.

During spraying, a jet of liquid is directed through a spray nozzle onto an object to be sprayed in order to moisten it with the liquid a) as evenly and completely as possible and / or b) to wet only in a specific batch, the latter in particular for objects with different materials or / and components. The liquid jet may be broad, more focused, or / and a spray.

The spraying is also called spraying in the same way. Usually, in this application, the word "spray ..." is used instead of "spray ...", although both terms are intended to have the same meaning in the meaning of this application. However, in many common terms such as e.g. "Throwing ring" did not change to "Sprühring".

Spraying is used in surface engineering in particular in cleaning, degreasing, derusting, pickling, rinsing with water, with an aqueous solution or / and with an organic solvent-containing liquid, spraying of aqueous conversion compositions, corrosion protection solutions, passivation solutions, primers, paints, insulating materials , Sealants, adhesives or / and their components containing liquids.

As systems for spraying, in particular the following systems are used in surface technology: chamber systems, chamber clock systems as well as e.g. reversing Kammertaktanlagen with alternating forward and reverse transport chain, continuous systems such. Tunnel installations and / or immersion spray systems. In an immersion spray system, the objects to be treated are sprayed in at least one section of the plant and immersed in at least one other section of the plant.

The individual sprayers are often in spray nozzle arrangements such as e.g. Arranged nozzle rings, injection registers and / or injection rings. As sprayers in particular nozzles of different design, different size and / or different pressure ranges are possible. The nozzles used are in particular flat-jet nozzles, spoon nozzles and / or tongue nozzles - e.g. as special forms of flat jet nozzles, full jet nozzles, hollow cone nozzles and / or full cone nozzles in use. Full cone nozzles can produce substantially circular or substantially rectangular spray patterns. Flat jet nozzles result in substantially rectangular spray patterns with quite different dimensions depending on the direction. The nozzles are often made of plastic depending on the conditions of use, e.g. based on polyethylene and / or made of stainless steel. If necessary, suitable adapters for each nozzle must be selected or / and adjusted for the nozzles.

It is necessary in particular in the case of a flat jet nozzle, hollow cone nozzle and / or full cone nozzle to achieve as precise as possible a beam alignment of the flat jet or the spray cone and / or as precise an angle adjustment as possible. In addition, it is necessary to control the beam alignment and the sufficient coverage of the object to be sprayed with the spray area. This can be done both when replacing a nozzle, re-attachment and / or re-adjustment such as after a nozzle cleaning.

When testing and / or adjusting a nozzle, it is usually necessary to shut down the system, to have all aerosols and mist removed from the system and to allow the system and its atmosphere to cool before entering the system, possibly with a rubber cover , Respiratory protection and safety goggles. This often takes 0.5 to 2 hours depending on the system. So far, the nozzles are roughly adjusted, for example, in a cleaning or nozzle replacement without tools. A fine adjustment is not common. A control of the setting or / and an optimization of the setting of nozzles is carried out in particular with regard to spray direction, sufficient wetting of the entire object surface to be sprayed and optionally sufficient overlapping of the spray area with the spray area of an adjacent nozzle. A control of the setting of each nozzle is only roughly possible visually and takes place if necessary with a short turn on the spray pump and the short spraying of the objects to be treated. If several spray nozzle arrangements such as nozzle rings, spray register and / or splash rings are close to each other, usually only the first and the last spray nozzle arrangement can be visually assessed and adjusted visually from the sides of the system, but not the intervening spray nozzle arrangements, without a longer time waiting. If nozzles of the first or / and the last spray nozzle arrangement are set insufficiently or incorrectly, the system must be switched off again and at least one of the nozzles of the first and / or last spray nozzle arrangement must be rechecked or / and adjusted. In this case, time is not always sufficient to wait until the plant is in a suitable state for entry and assessment by the skilled person, because it is occasionally observed that facilities may be entered prematurely, which is labor law and possibly also for the results of the assessment of concern can be.

With each nozzle cleaning and nozzle replacement, it is necessary to properly position and align a nozzle. In this case, a nozzle can be offset in direction of spraying, laterally and / or vertically and / or laterally and / or vertically rotated and / or optionally removed or / and added. In this case, spray nozzle arrangements such as e.g. Nozzle rings, spray registers and / or spray rings in spraying direction, offset laterally and / or vertically and / or laterally and / or vertically rotated and / or optionally removed and / or added.

Spray nozzles are used in particular in the following process steps of the surface technology: When cleaning, degreasing, rust removal, pickling, rinsing with water, with an aqueous solution such. with a so-called rinsing solution or sealing liquid or with a liquid containing organic solvents, spraying of aqueous conversion compositions, corrosion protection solutions, passivation solutions, primers, paints, insulating material, sealant and / or adhesive-containing liquids in particular of metallic surfaces, but also during cleaning, degreasing, rinsing with water, with an aqueous solution such as with a so-called rinsing solution or sealing liquid or with a liquid containing organic solvents, in the spraying of antistatic compositions, metallizing liquids, passivation solutions, primers, paints, insulating material, sealant and / or adhesive-containing liquids, in particular plastic surfaces.

Problems or / and less good treatments occur in particular if, for example, incomplete coverage of the object surface with the spray areas takes place, so that the spray liquid can not wet the entire surface of the object. Or / and if, for example, only certain areas of the object surface are to be sprayed, for example, in some applications, in particular with insulating material, sealant and / or adhesive, so that If the nozzle setting is bad, it may happen that the object becomes dirty at undesired places and may not be overpaintable, although it should also be overpainted there. This can lead to undesirably rough surfaces, in particular with a sealant. In addition, all fluids may generally experience unnecessary fluid consumption and / or unnecessarily high numbers of nozzles and / or nozzle assemblies in a plant.

For example, in the alkaline cleaning a welded Auomobil body different cleaning, especially of liquid, pasty and / or dry contaminants such as coolants, press oils, other process aids, metal abrasion and / or dusts occur when the body is not on all sides to the same extent with the Cleaning liquid is sprayed or / and the spray liquid can not act everywhere equally strong. Then it can happen that parts of the cleaned body are still slightly soiled and not everywhere in the subsequent conversion coating evenly and completely wetted and coated. Today, in the treatment of bodies, a tunnel is usually used which comprises cleaning, rinsing with water or aqueous solution, acid pickling where appropriate, and then rinsing with water or aqueous solution, pretreating with a conversion coating composition based on zinc phosphate, for example or based on silane, rinsing with water or with aqueous solution or / and optionally further treatment steps. All of these treatments can basically be done by spraying, with spraying being used more often than diving or spray diving in which some of the equipment is sprayed and partially submerged. Many plants use 1000 to 4500 nozzles per system. If a wrong or bad nozzle setting is used in at least one of these process steps, a faulty product can only be avoided when working over an unnecessarily long time and / or with an inherently unnecessary amount of nozzles and / or treatment liquid per body. The process then either leads to a certain proportion of faulty bodies, which have to be treated individually and / or individually by hand and / or at an unnecessarily long time cycle, to a multiplicity of unnecessary spray nozzles, spray nozzle arrangements and / or process steps an inherently unnecessary excess consumption of treatment liquid (s) or / and an intrinsically unnecessary volume of circulating water, waste water and contaminated process liquid (s). The greatest expense here is usually the rework, for example by grinding the faulty body parts after coating, in particular with a cathodic dip or / and after coating, in particular with a cathodic dip or powder coating and at least one other paint. In unfavorable production situations, more than one-third or, rarely, more than two-thirds of the painted bodies may each have at least one body to be reworked. This disturbing especially markings, ie bumps, which visually attract attention when viewing the paint such as orange peel, Rivulets and / or mapping, and / and in rare cases, the dissolution of insulating, sealing and / or adhesives, for example, from the interior of the Body or / and the components joined by insulation, caulking or / and gluing. Marking can be the result of an uneven conversion coating or / and a partially missing or insufficient conversion layer, eg due to insufficient adhesion to insufficiently cleaned metallic surface parts. These can occur per body at about one to more than twenty points. They are then to be reworked at these points. A part of the bodies to be reworked, when ground down to the bare metal of the body, again passed into the tunnel and passed through, for example, through stages of cleaning, optionally the pickling, then the pretreatment with a conversion composition and several rinsing steps and dried. If the reworking effort is too high, in rare cases, the entire faulty body is scrapped.

For example, in the manufacture of aluminum wheels for use in vehicle construction, lacquer inclusions, lack of corrosion protection, as can be seen in a scratch test and subsequent salt spray test, may result in insufficient paint adhesion, as can be seen in the cross-cut test, and / or discoloration. They occur in particular when the alkaline cleaning solution or / and the acid pickling solution does not strike and act evenly on the surface of the wheels. For the treatment of wheels made of aluminum alloy, the following sequence of processes is often used, in particular in a treatment tunnel: first alkaline cleaning of the wheels, usually mechanically finished, rinsing with water and / or with aqueous solution, pickling with an acidic aqueous pickling solution, rinsing with water or / and with aqueous solution, conversion coating with an aqueous conversion composition, rinsing with water and / or with aqueous solution, optionally conversion coating with a second different aqueous conversion composition and rinsing with water and / or with aqueous solution, drying, for example in a sticky water dryer and at least once painting eg with powder coating, with water-based and / or solvent-based lacquer and subsequent drying and / or baking. If the paint adhesion is insufficient, the coated wheels must be stripped in a mostly alkaline solution of a paint stripper and given back to the entire treatment process. In the case of metal abrasion and / or dust inclusions, the coated wheels are sanded by hand and re-introduced into the entire treatment process. As a result, the theoretically possible capacity of the treatment plant can be significantly reduced, for example by up to 25%.

In particular, errors such as e.g. Discoloration especially on glossy surfaces occur and lead to similar or same types of treatment and / or the treatment sequence.

These problems lead to temporary or permanent reworking and / or repeated treatment, whereby there is hardly a plant that works absolutely flawlessly for more than half a year.

The Applicant is not aware of nozzle setting aids that are offered to avoid errors in surface engineering. Rather, there is a need for many years, the nozzles in a simple way to check their setting and function and to be able to adjust optimized.

The nozzle setting aid according to the invention can basically be used for all types of nozzles and nozzle arrangements in all types of chamber, chamber clock and tunnel installations. Advantageously, this at least two, at least four, at least six or at least eight Düseneinstellhilfen be used simultaneously to work in a suitable, comfortable and / or time-saving. Because with the simultaneous use of several Düseneinstellhilfen can be worked much more efficient and also overlapping areas can be controlled better and easier.

The nozzle setting aid according to the invention can also be used in existing systems for selecting the correct nozzle angle taking into account the distance nozzle opening - object surface. If, for example, the size of the object to be acted on changes, the installation angle, the orientation and / or the position of the nozzle may also have to be adapted and / or another more suitable nozzle selected. Since the application area = actual spray area changes with the nozzle-object surface distance, this check, change or / and adjustment with at least one nozzle adjustment aid is easily possible. At low pressures, the spray may easily fall off due to gravity and entrained air, so that the actual spray area may be smaller or / and, for example, downwardly offset than the theoretical spray area. The theoretical spray range is determined in particular by the nozzle design, position and orientation of the nozzle. Standard data for the different nozzles are usually tabulated. The difference between theoretical and actual spray area can often be disregarded when working with sufficient overlap of spray areas from adjacent nozzles. If a larger area is to be covered than achievable with only one nozzle, at least two nozzles are used so that their actual spray areas at least slightly overlap.

It is therefore an object to provide auxiliaries and methods that allow a better or more accurate control and adjustment of nozzles and spray conditions. They can help to reduce the proportion of errors temporarily or permanently and thus lead to savings in liquids, waste, manual processing and / or repeated treatments. These aids or methods should be as simple and robust as possible, be sufficiently precise and be able to be used with the least possible expenditure of time. Because a higher amount of time can mean production loss.

It has now been found that it is good, sufficiently precise and easy to optimize the spray area of spray nozzles with a nozzle setting aid according to the invention, which is equipped with at least two laser pointers or with at least two other light sources emitting sharp focused or focused light. Laser pointers have the advantage that, unlike other light sources, they are also able to penetrate aerosols and fog well. Hereby, the spray nozzles can be adjusted, for example, in a pretreatment plant sufficiently accurately to the objects to be sprayed, such as, for example, bodies. It would be beneficial if one Aid could be proposed which is not too large and too heavy for use in such a plant and can withstand harsh working conditions.

It has now been found that with a nozzle setting aid according to the invention in many installations and applications about one third and sometimes even about half the time of maintenance including testing and adjustment of the nozzles can be saved. It has now also been found that in some systems about 10% of the nozzles can be saved if all nozzles are set optimized. It has now also been found that a significant proportion of circulating water, wastewater and process liquids can be saved. Therefore, due to better control and adjustment of the nozzles can result in a considerable saving and improvement. Pre-spray and over-spray can now be minimized or even completely avoided.

The object is achieved with a Düseneinstellhilfe A for a Flüssigkeitsssprühdüse B for checking, positioning and / or setting of at least one nozzle B for spraying in systems of surface technology, which is characterized in that the Düseneinstellhilfe A a nozzle adapter F and at least two positioned and aligned light sources H and / or M with sharp focusing and / or with focusing, by means of which at least two light beams J and / or P approximately along the nozzle centerline D and / and approximately along at least one edge line R at the edge of the theoretical spray range C and / or can be generated approximately along at least two preferably opposite marginal lines R, which are intended essentially to indicate the position and size of the theoretical spray area C, which are located in points of light on the object surface, on hangers, on transport devices or / and on walls in the Plant can be visible that de r corresponds to angles formed by the light beams J or / and P in approximately half or all of the theoretical spray angle N, O and that the light beams J and / or P in at least a substantially centrosymmetric section through the theoretical spray area C are placed. The middle beams J, P, the nozzle centerline D, and the ridge lines R preferably intersect at approximately a point on an axis perpendicular to the central point Z. Preferably, also the mirror plane G intersects at least approximately with this axis.

With the at least two light sources H, M, at least two light beams J, P and on surfaces opposite to the nozzle at least two points of light can be generated, the at least one edge line R or at least one edge point at the edge of the theoretical spray area C and optionally also the nozzle center line D represent in a plane and possibly substantially centrosymmetric section through the theoretical spray area C.

The nozzle center line D usually indicates the direction and / or the range of the highest spray pressure. However, decreasing spray pressure often does not affect the quality of the treatment. Because it depends mainly on the uniform wetting with the respective liquid and on a sufficient wetting time. Therefore, well wetted object surfaces are usually sufficient, in which the spray nozzles are set optimally and in which adjacent spray areas C overlap somewhat in order to allow a uniform treatment over the entire wetted object surface.

In many embodiments, it is sufficient to use two light sources of the second type M and M to produce two light beams P and P substantially in a plane through the nozzle centerline D, such as left and right of the nozzle centerline D, facing two spots of light on one of the nozzles lying surface that the edge points of the theoretical spray area C in a plane and substantially centrosymmetric section through the theoretical spray area C at least approximate. Optionally, a light source of the first type H for the approximate representation of the nozzle center line D with a light beam J is additionally used.

The smaller the light source adapters and the light sources, the more light source adapters and light sources can be simultaneously fixed on a nozzle setting aid A, and the more the different total angles O and thus different spray areas C, e.g. alternately illuminated by light rays P. In individual embodiments of the nozzle setting aid according to the invention, the light source adapters with the light sources are preferably so small that in each case more than two of them can be fixed simultaneously on the base plate E of the nozzle setting aid. The Düseneinstellhilfe A can then in addition to the base plate E and the nozzle adapter F comprises a total of 3, 4, 5, 6, 7, 8 or 9 light source adapter with light sources that are either only light sources of the second type M or a light source of the first kind H and several light sources of the second type M are. In this case, the light source adapters and light sources of the second type M are preferably arranged in pairs to represent different overall angles O and optionally the nozzle center line D.

In the case of the nozzle setting aid according to the invention, the light source adapters with the light sources of the second type M are preferably arranged in pairs in order to be able to illuminate different overall angles O without assembly work. In several preferred embodiments, the light source adapters of the light sources H, M can be fixed approximately mirror-symmetrically about the nozzle center line D, the mirror plane G and / or the middle light beam J of the light source of the first type H.

Preferably, the light source adapter of the light sources H, M via conventional design tools such as threads, nuts, screws and / or positioning aids such as stops, recesses, Holes, locating pins, notches, grooves and / or locking positions mounted on a base plate E, positioned and aligned to certain angle settings.

In several preferred embodiments, the light source adapters of the light sources H, M can be fixed substantially mirror-symmetrically about the nozzle center line D, the mirror plane G and / or the middle light beam J of the light source of the first type H.

In preferred embodiments, the light source adapters of the light sources H, M can be fixed in the base plate E via at least one first coaxial recess in comparison with the coaxial arrangement of bores, positioning aids, angle alignment aids and / or at least one second recess in the base plate E Light sources H, M as continuously as possible to adjust to different angles N, O, wherein the axis for the coaxial means substantially perpendicular to the base plate E, through the central point Z and / or in the mirror plane G extends.

Alternatively or additionally, it is possible that at least one of the light source adapters a rigid support is / is attached to make an angular adjustment and exact alignment by the end of the rigid support at a central location of the nozzle adapter F and / and the nozzle B at the intersection of all Angle N, M is fixed, which preferably coincides with the central point Z.

• Figur 1 zeigt beispielhaft eine Düseneinstellhilfe A, die neben der Grundplatte E und dem Düsenadapter F insgesamt 2 Lichtquellenadapter MA mit zwei Lichtquellen der zweiten Art M umfasst. Die Lichtquellenadapter HA mit einer Lichtquelle der ersten Art H und weitere Details werden nicht dargestellt. Die Lichtquellen sind hierbei bevorzugt Laserpointer. Die Lichtquellen können beispielsweise durch Bajonettverschlüsse, Flügelmuttern, Flügelschrauben oder/und Spannringe fixiert werden. Die Positionierung und Ausrichtung der Lichtquellenadapter und somit auch der Lichtquellen erfolgt hierbei bevorzugt über Bohrungen, Fixierstifte und Ausnehmungen, in die die Fixierstifte einrasten können. Von links aus kann eine Düse B in die nicht dargestellte Aufnahmeöffnung des entsprechend ausgeführten Düsenadapters F eingeführt und fixiert werden/sein.

The invention is exemplified by the following drawing:

• FIG. 1 shows by way of example a Düseneinstellhilfe A, in addition to the base plate E and the nozzle adapter F comprises a total of 2 light source adapter MA with two light sources of the second type M. The light source adapter HA with a light source of the first kind H and further details are not shown. The light sources are preferably laser pointers. The light sources can be fixed, for example, by bayonet locks, wing nuts, thumbscrews and / or clamping rings. The positioning and alignment of the light source adapter and thus also the light sources is preferably carried out via holes, fixing pins and recesses into which the fixing pins can engage. From the left, a nozzle B can be inserted into the not shown receiving opening of the correspondingly executed nozzle adapter F and fixed / be.

List of reference numbers:

• Nozzle adjustment aid A
• Nozzle B as a liquid spray nozzle
• Spray area C
• Nozzle centerline D
• Base plate E
• Nozzle adapter F
• Mirror plane G
• Light source of the first kind H
• Height I of the mean light beam J of a light source above the base plate E
• mean light beam J of the light source of the first type H or second type M
• Height K of the nozzle center line D above the base plate E
• Plane L of the base plate E
• Light source of the second kind M
• Light source adapter HA and MA
• Half angle N
• Total angle O
• mean light beam P of a light source of the second kind M
• Construction Q perpendicular to the base plate E with at least one additional light source adapter MA
• Edge line R at the edge of the theoretical spray area C
• central point Z.

• Die erfindungsgemäße Düseneinstellhilfe A ist bevorzugt so ausgeführt und
• an der jeweiligen Düse B so befestigt zur Prüfung oder/und Einstellung der Düse B, dass eine im Wesentlichen zentrosymmetrische Anordnung für die Lichtstrahlen J oder/und P z.B. der Lichtquellen H und M oder H und H oder
• H und M und H der Düseneinstellhilfe A gebildet wird, die zumindest näherungsweise mit der im Wesentlichen zentrosymmetrischen Anordnung der Düse B und des Sprühbereichs C mit der Düsenmittellinie D zusammenfällt.

A particularly preferred embodiment of the Düseneinstellhilfe is described in the following first as exemplified in a variant in FIG. 1 is shown:

• The nozzle adjusting A according to the invention is preferably designed and
• attached to the respective nozzle B for testing and / or adjustment of the nozzle B, that a substantially centrosymmetric arrangement for the light beams J and / or P, for example, the light sources H and M or H and H or
• H and M and H of the Düseneinstellhilfe A is formed, which coincides at least approximately with the substantially centrosymmetrical arrangement of the nozzle B and the spray area C with the nozzle center line D.

It is believed that nozzle centerline D is typically the centerline of spray area C, which should be largely consistent with geometrically sound and clean nozzles even in harsh practice. The flat base plate E, which may be made of a sheet metal or of a plastic plate, for example, preferably has an approximately mirror-symmetrical basic shape. On the one hand, a nozzle adapter F for a nozzle B can be fixed or fixed in any conventional manner. For this purpose, the nozzle B is inserted and fixed in a receiving opening not shown in detail in the nozzle adapter F. The nozzle adapter F is preferably designed so that it is suitable for connection of at least one particular nozzle B. The nozzle adapter F is prepared so that it is mounted centrally on the mirror plane G of Düseneinstellhilfe A /, wherein the mirror plane G is preferably perpendicular to the plane of the base plate E and preferably also with the nozzle center line D and in the course also with the central light beam J of the light source of the first kind H at least approximately coincident. The nozzle adapter F can be arbitrarily adapted to the nozzle type, size and shape or be replaced if necessary. If appropriate, it can be designed such that it has a quick-action clamping device or another fixing device which is easy and quick to operate for fixing the nozzle having. If necessary, a light source of the first type H can be fixed in the mirror plane G and in the direction of the nozzle center line D on the base plate E. The nozzle adapter F and the light source adapter HA and / or MA, which fix the light sources of the first kind H and / or the second type M on the base plate E in position and angle to the nozzle center line D preferably do not belong to the base plate, so that an exchange of nozzle adapters F can take place depending on the design of the nozzle B to be tested and / or adjusted and so that the light source adapters can be displaced with the light sources, eg to form different sized half angles N and / or total angles O, the latter comprising the spray area C should approximate. The nozzle adapter F and the light source adapter may be made of metal or plastic, for example, and be made of blocks, for example. As light sources commercial elements and / or self-constructions can be used, preferably those which have small dimensions and can be operated with battery or rechargeable battery in order to work without electrical cables. Each light source adapter is suitably designed so that it can receive a light source, for example via a suitable receiving opening, in which the light source can then be aligned and fixed. As a light source is basically any one that emits sharply focused or focused light in a suitable design and size such as a small laser pointer. The nozzle adapter F and optionally also the light source adapter are preferably not permanently fixed, but eg simple and easy to solve and easy to fix adhesive technology, soldering and / or mechanical fastening technology on conventional design tools such as threads, nuts and / or screws and / or over Positioning aids such as stops, recesses, holes, pins, notches, grooves and / or detent positions, for example, for receiving the protruding parts of fixing pins that allow the position and orientation of the nozzle adapter F and / or the light source adapter as needed. For positioning and alignment of the light source adapter and thus the light sources can serve, for example, holes and / or recordings for the preceding parts of the fixing pins, which allow, for example, also different sized half angle N and / or total angle O easy to use and to use. With appropriate preparation, these holes and / or recordings may be suitable for use with light source adapters and light sources half-angle N eg of 5 °, 10 °, 15 ° or 20 ° for some or all, for example by 5 °, 10 ° or 20 ° larger angles up to, for example, 60 ° or 80 °, which are limited by beams J and P. With appropriate preparation, these holes and / or recordings may be suitable to light source adapters and light sources total angle O, for example, from 10 ° or 20 ° to all or some by, for example, each 5 °, 10 °, 15 ° or 20 ° larger angle to to form, for example, 120 ° or 160 °, which are limited by light beams P and P.

Preferably, the light source adapter of each light source H, M is configured and fixed together with each light source so that the height I of the central light beam J, P of each light source above the base plate E is substantially identical to the height K of the nozzle center line D above the base plate E. is. Preferably, all mean light beams J, P of the light sources and the nozzle center line D extend approximately in a plane which runs parallel or substantially parallel to the plane L of the base plate E and possibly through the central point Z. If required, at least one light source of the second type M can be fixed on the base plate E at a defined angle laterally to the direction of the mirror plane G. If more than one light source of the second type M is fixed on the base plate E, these are preferably fixed in pairs. In this case, it is preferable in each case at least one light source of the second type M to the left and at least one light source of the second type M to the right of the nozzle center line D, the mirror plane G and the middle light beam J of the light source of the first type H, each with approximately equal half angles N. to select and set left and right.

In a first embodiment, two light sources of the second type M are fixed laterally of the nozzle center line to the left and to the right. Optionally, in addition, a light source of the first type H can be additionally fixed /. In a second embodiment variant, a light source H of the second type is / is fixed together with a light source D of the first type. Therefore, the half angles N or / and the total angles O are taken into account, which are preferably adjusted to values corresponding to the theoretical spray angle, e.g. are set by a multiple of 5 ° or 10 °.

1. 1.) Die Düseneinstellhilfe A umfasst neben der Grundplatte E und dem Düsenadapter F insgesamt 2, 3, 4, 5, 6, 7, 8 oder 9 Lichtquellenadapter mit Lichtquellen, die entweder nur Lichtquellen der zweiten Art M sind oder die eine Lichtquelle der ersten Art H und mindestens eine Lichtquelle der zweiten Art M sind. Je kleiner die Lichtquellenadapter und die Lichtquellen sind, desto mehr Lichtquellenadapter und Lichtquellen können gleichzeitig auf einer Düseneinstellhilfe A fixiert sein und umso mehr können verschieden große Gesamtwinkel O und somit verschieden große Sprühbereiche C z.B. im Wechsel oder gleichzeitig durch Lichtstrahlen P ausgeleuchtet werden. Vorzugsweise werden nur einzelne der zahlreichen Lichtquellen M im Betrieb bei einem Arbeitsvorgang genutzt. Falls hierbei alle in einer Anlage genutzten Sprühdüsenwinkel O mit fixierten Lichtquellen M vorhanden sind, ist möglicherweise nur noch im Bedarfsfall der Düsenadapter F zu wechseln, um ihn an eine andere Düse anzupassen. Falls der eine fixierte Düsenadapter F der einzige benötigte für diese Anlage ist, entfällt auch der Austausch des Düsenadapters F. In diesen Fällen kann es sich gegebenenfalls lohnen, mehrere oder alle Adapter F,HA,HM auf Dauer auf der Grundplatte E zu fixieren oder mit ihr einstückig oder zweistückig auszuführen.
2. 2.) Genauso wie oder ähnlich wie bei den vorherigen Ausführungsvarianten, können auch bei dieser Düseneinstellhilfe A neben der Grundplatte E und dem Düsenadapter F mehrere Lichtquellenadapter mit Lichtquellen genutzt werden. Insbesondere für den Fall, dass Winkelzwischenwerte benötigt werden oder dass die insbesondere paarweise eingesetzten Lichtquellenadapter mit Lichtquellen in geringerer Zahl, aber einfach und flexibel eingestellt werden sollen, kann z.B. über eine längere koaxial um eine Achse senkrecht zur Grundplatte E und durch den zentralen Punkt Z angeordnete Aussparung, die im Vergleich zu den bisherigen Ausführungsformen eine Reihe von Bohrungen ersetzen kann, und gegebenenfalls über eine zweite längere koaxial angeordnete Aussparung, die im Vergleich zu den bisherigen Ausführungsformen eine Reihe von Bohrungen oder Aufnahmen oder anderen Hilfen zur Winkelausrichtung wie Kerben, Nuten, Anschlägen, Rastpositionen usw. ersetzen kann. Auf diese Weise kann eine einfach, schnell und flexibel verwendbare Düseneinstellhilfe A geschaffen werden. Alternativ oder zusätzlich ist es möglich, einen starren Träger an mindestens einem der Lichtquellenadapter anzubringen, um eine Winkeleinstellung und exakte Ausrichtung vorzunehmen, indem das Ende des starren Trägers an zentraler Stelle des Düsenadapters F oder/und der Düse B im Schnittpunkt aller Winkel N,M fixiert ist/wird, der vorzugsweise mit dem zentralen Punkt Z zusammenfällt
3. 3.) Die bisherigen Ausführungsformen der Düseneinstellhilfe A haben sich für die Prüfung und Einstellung von Düsen hervorragend bewährt, wenn der Sprühbereich C im Wesentlichen kegelförmig mit radial in etwa konstanten Querschnittsdurchmessern oder in einer Übergangsform zwischen im Wesentlichen kegelförmig bis im Wesentlichen pyramidenförmig mit näherungsweise quadratischem Querschnitt vorliegt. In einer dritten besonderen Ausführungsform der Düseneinstellhilfe A, die in der Grundeinrichtung genauso oder ähnlich wie bei den vorherigen Ausführungsvarianten gestaltet sein kann, können gegebenenfalls alle wesentlichen Elemente der vorherigen Ausführungsvarianten vorliegen. Darüber hinaus kann es insbesondere für die Prüfung und Einstellung von Flachstrahldüsen von Interesse sein, die Düseneinstellhilfe A so auszustatten, dass sie vorzugsweise in etwa senkrecht zur Grundplatte E in etwa in der Ebene der Spiegelebene G oder parallel hierzu zusätzlich mindestens einen Aufbau Q aufweist, der so gestaltet ist, dass er mindestens einen Lichtquellenadapter mit Lichtquelle auf der Oberseite oder/und auf der Unterseite der Grundplatte E aufweist. Dieser Aufbau Q kann bei Bedarf im Wesentlichen oder teilweise der Grundplatte E und ihren Aufbauten entsprechen. Hierbei kann der Lichtquellenadapter mit Lichtquelle der ersten Art H bei Bedarf entfallen, wenn Lichtquellenadapter mit Lichtquelle sowohl auf der Oberseite, als auch auf der Unterseite genutzt werden. Hierbei ist es bevorzugt, insgesamt 4 bis 20 Lichtquellenadapter mit Lichtquellen einzusetzen. Hiermit ist es möglich, einen Sprühbereich C näherungsweise mit Lichtstrahlen bzw. Lichtpunkten anzudeuten, der in seinen beiden Hauptrichtungen sehr unterschiedliche Längserstreckungen aufweist.

Special variants are, for example, the following:

1. 1.) The Düseneinstellhilfe A includes in addition to the base plate E and the nozzle adapter F a total of 2, 3, 4, 5, 6, 7, 8 or 9 light source adapter with light sources that are either only light sources of the second type M or a light source of the first Art H and at least one light source of the second type M are. The smaller the light source adapters and the light sources are, the more light source adapters and light sources can be simultaneously fixed on a nozzle alignment aid A and all the more different total angles O and thus different sized spray areas C eg alternately or simultaneously illuminated by light rays P. Preferably, only a few of the numerous light sources M are used during operation in one operation. If in this case all the spray nozzle angles O used with a fixed light source M are present, the nozzle adapter F may only need to be changed if necessary in order to adapt it to a different nozzle. If the one fixed nozzle adapter F is the only one required for this system, also the replacement of the nozzle adapter F is omitted. In these cases, it may be worthwhile to fix several or all adapters F, HA, HM permanently on the base plate E or with to do it in one piece or in two pieces.
2. 2.) Just as or similar to the previous embodiments, can also in this Düseneinstellhilfe A in addition to the base plate E and the nozzle adapter F several light source adapter can be used with light sources. In particular, in the event that angle intermediate values are required or that the particular paired light source adapter with light sources in a smaller number, but should be easily and flexibly adjusted, for example, over a longer coaxially about an axis perpendicular to the base plate E and through the central point Z arranged Recess that can replace a number of holes compared to the previous embodiments, and optionally a second longer coaxially arranged recess, which in comparison to the previous embodiments, a series of holes or receptacles or other aids for angular alignment such as notches, grooves, stops , Locking positions, etc. can replace. In this way, a simple, fast and flexible usable Düseneinstellhilfe A can be created. Alternatively or additionally, it is possible to attach a rigid support to at least one of the light source adapters for angular adjustment and exact alignment by locating the end of the rigid support at a central location of the nozzle adapter F or / and the nozzle B at the intersection of all angles N, M is fixed, which preferably coincides with the central point Z.
3. 3.) The previous embodiments of the Düseneinstellhilfe A have proven excellent for the testing and adjustment of nozzles when the spray area C is substantially conical with radially approximately constant cross-sectional diameters or in a transitional shape between substantially conical to substantially pyramidal with approximately square cross-section is present. In a third particular embodiment of the nozzle setting aid A, which may be designed in the basic device in the same way or similar to the previous embodiment variants, all the essential elements of the previous variant embodiments may optionally be present. Moreover, it may be of particular interest for the inspection and adjustment of flat jet nozzles to equip the nozzle setting aid A so that it is preferably approximately vertical to the base plate E approximately in the plane of the mirror plane G or parallel thereto additionally at least one structure Q, which is designed so that it has at least one light source adapter with light source on the top and / or on the underside of the base plate E. This structure Q may correspond, if necessary, substantially or partially to the base plate E and its structures. In this case, the light source adapter with the light source of the first type H can be omitted if required, if light source adapter with light source are used both on the top and on the bottom. In this case, it is preferable to use a total of 4 to 20 light source adapters with light sources. This makes it possible to suggest a spray area C approximately with light rays or light points, which has very different longitudinal extents in its two main directions.

For example, a single maintenance of a motor vehicle coating plant with eg 10 to 14 baths with nozzles, each bath eg 20 to 40 nozzle sticks, each with 8 nozzles, which are optionally once a month to four times serviced, conventionally per maintenance with cleaning and testing about one to two hours per bath and about 10 to 24 hours per unit without nozzle setting aid if all nozzles are replaced, cleaned and / or roughly adjusted. Using at least two nozzle alignment aids in accordance with the invention, this replacement and / or adjustment of the nozzles may take about 6 to 16 hours. The use of at least two nozzle setting aids according to the invention is helpful for checking and optimizing coverage of spray areas. In convenient maintenance situations preferably two, about four, about six or about eight Düseneinstellhilfen be used to control as possible the entire spray nozzle assembly with the least possible effort and / or wait, so that the time required rather even further decreases compared to the control and / or for adjustment with only two nozzle adjustment aids. In a saving For example, 8 hours of maintenance time can increase production in such a system by about 80 to 120 vehicles.

In addition, the nozzle settings after adjustment of nozzles using the Düseneinstellhilfe invention normally no longer be controlled later and not be readjusted, but remain unchanged until the next maintenance. Therefore, a multiple advantage is achieved not only by shorter maintenance times, but also by eliminating additional control and adjustment times and by a much better spray and treatment quality.

With regular use of Düseneinstellhilfen also succeeds, the number of nozzles used, the amount of the process liquid (s) used, the amount of excess process liquid (s) depending on the spray nozzle assembly and their position (= Vorspray and / or overspray) such. at purification stages, pre-treatment stages and rinsing stages, to significantly reduce the unnecessary amount of excess process fluid and waste water in the process, the amount of rejects and the amount of manual reworking and / or repeated treatments. In addition, unnecessary production loss is avoided in the respective plant due to the shorter maintenance. Personnel, material and disposal costs are reduced accordingly. In many systems, even up to about 15% of the nozzles and possibly also the nozzle arrangements can be saved, because often in doubt clearly set too many nozzles that unfold due to poor setting an insufficient effect. If a plurality of identically constructed systems exist, it may be sufficient to set the nozzles of the first system in detail with the nozzle setting aid according to the invention in an optimized manner and to transfer the experiences gained in this case to the second system.

The object is also achieved with a method for improving the spraying in a plant of the surface technology, characterized in that, for testing, positioning or / and adjusting at least one liquid spray nozzle B in a surface-treatment plant, a nozzle setting aid A is used according to at least one of the product claims.

The method according to the invention is characterized in particular by the fact that, when testing, positioning and / or adjusting at least one nozzle B and / or at least one nozzle assembly with at least one nozzle B, the nozzle center line D, the nozzle nozzle-object surface distance, the theoretical spray region C, the actual spray area on sprayed object surfaces, the half-angle N extending laterally from the nozzle center line D, the overall angle O between at least two preferably opposing light beams J, P and / and the overlap of the spray area of a first nozzle with the spray area of at least one other nozzle is improved.

The object is further achieved with the use of a system of surface technology with nozzles B and / or at least one nozzle with at least one nozzle B, which is set with the nozzle adjustment A at least partially improved / are.

The object is finally achieved with the surfaces coated in a system of surface technology with at least partially improved nozzles B and then further treated objects and / or with the products produced according to the method claims in vehicle construction, as architectural elements in construction or for the manufacture of equipment and machinery such. electrical appliances or household appliances.

Examples and Comparative Examples: A) Test in a tunnel pretreatment plant for car bodies:

Prior to optimizing the nozzle setting with a Düseneinstellhilfe invention in a tunnel pretreatment plant for bodies could not everywhere and especially not in the roof area sufficiently closed, sufficiently uniform and uniformly thick zinc phosphate layers are applied, which due to the only roughly set nozzles to a reduced corrosion protection in this area resulted in a serious quality defect in about 30% of the vehicles.

After optimizing already half of the nozzles with at least one nozzle setting aid according to the invention, the phosphate layers were nearly always and almost everywhere closed and uniformly formed and had a significantly higher coating weight than before in the problem areas hitherto. Therefore, the corrosion protection e.g. significantly improved in the roof area due to the optimized nozzle setting. The necessary quality of the corrosion protection was ensured in at least 95% of the vehicles or even safely on each vehicle without reworking.

B) Test in a tunnel pretreatment plant for bodies for vans:

Due to significantly wrong nozzle setting was the spraying of vehicle rear doors with a steeply sloping rear relative to the roof in a tunnel pretreatment system for bodies for vans that the tail areas were mistreated in poorly adjusted fogger nozzles with a surfactant-containing rinse water incomplete. Because of this, these surface areas after coating with cathodic dip paint raised markings with runners, so-called Rivulets, and / or mapping, ie plastic markings similar to a map, all clearly visible even after applying the filler and the topcoat in a side view were. Before the optimization of the nozzles with a Düseneinstellhilfe invention were about 50% of all Vehicles to find markings at one or more points of the vehicle, so that usually all these points by grinding and repainting were optionally treated with a pretreatment and with multiple paint layers consuming.

Due to the optimal alignment of the mist nozzles with at least one Düseneinstellhilfe invention, the raised markers with a runner and the mapping that had been caused by this poor wetting with surfactant-containing rinse water, could be largely avoided. After the optimization of the mist nozzles with at least one Düseneinstellhilfe invention, the percentage of vehicles with points to be ground due to markings on the vehicle only about 5%.

C) Tunnel pretreatment plant for aluminum wheels:

In the production of painted aluminum wheels, due to poor nozzle setting in a tunnel pretreatment plant, so-called trailers may come out of the screw holes in the water rinse stage, because a strong acidic liquid will remain in the screw holes, causing white discoloration and excessive stain effect. In this case, the stained effect on the previously bright-turned surfaces leads to streaky or cloud-like white discolorations, which mean that the affected surfaces need to be luster-cut, pretreated and painted again only for this reason.

After adjusting the nozzles with the aid of at least one nozzle setting aid according to the invention, these post-runners, strong staining effects, white discolorations and reworking have almost ceased to be encountered in this plant.

Claims (14)

A nozzle setting aid (A) for a liquid spray nozzle (B) for testing, positioning or / and adjusting at least one nozzle (B) for spraying in surface treatment plants, characterized in that the nozzle setting aid (A) comprises a nozzle adapter (F) and at least two having positioned and aligned light sources (H, M) with sharp focus or / and with focus,
with the help of which at least two light beams (J, P) approximately along the nozzle center line (D) and / or approximately along at least one edge line (R) at the edge of the theoretical spray area (C) or approximately along at least two preferably opposite edge lines ( R) can be generated
which should essentially indicate the position and size of the theoretical spray area (C) which can be seen in light spots on the object surface, on hangers, on transport devices and / or on walls in the installation,
in that the angle formed by the light beams (J, P) corresponds approximately to half or all of the theoretical spray angle (N, O) and that the light beams (J, P) are laid through the theoretical spray area (C) in at least one substantially centrosymmetric section are. Düseneinstellhilfe according to claim 1, characterized in that with the at least two light sources (H, M) at least two light beams (J, P) and on opposite surfaces of the nozzles at least two light spots can be generated, the at least one edge line (R) or represent at least one edge point at the edge of the theoretical spray area (C) and possibly also the nozzle center line D in a plane and substantially centrosymmetric section through the theoretical spray area (C). Nozzle adjustment aid according to claim 1 or 2, characterized in that with two light sources of the second type (M and M) two light beams (P and P) are generated substantially in one plane through the nozzle center line (D), the two points of light on one of the nozzle opposite surface can be visible, representing the edge points of the theoretical spray area (C) in a plane and possibly substantially centrosymmetric section through the theoretical spray area (C). Düseneinstellhilfe according to at least one of claims 1 to 3, characterized in that the light source adapter of the light sources (H, M) via conventional design aids and / or positioning aids on the base plate (E) mounted, positioned and aligned to certain angle settings. Düseneinstellhilfe according to at least one of claims 1 to 4, characterized in that the light source adapter with the light sources are so small that in each case more than two of them are fixed simultaneously on the base plate (E) of the Düseneinstellhilfe (A). Düseneinstellhilfe according to at least one of claims 1 to 5, characterized in that the light source adapter with the light sources of the second type (M) are arranged in pairs. Nozzle adjustment aid according to at least one of Claims 1 to 6, characterized in that the light source adapters of the light sources (H, M) are mirror-symmetrical about the nozzle center line (D), the mirror plane (G) or / and the middle light beam (J) of the light source of the first type (H) are fixed. Düseneinstellhilfe according to at least one of claims 1 to 7, characterized in that the light source adapter of the light sources (H, M) via at least one first coaxial recess in the base plate (E) compared to the coaxial arrangement of holes, positioning aids, aids for angular alignment and / or at least a second recess in the base plate (E) are fixed to the light sources (H, M) as continuously as possible to different angles (N, O ), wherein the axis for the coaxial means substantially perpendicular to the base plate (E), through the central point Z and / or in the mirror plane G extends. Düseneinstellhilfe according to at least one of claims 1 to 8, characterized in that it preferably in approximately perpendicular to the base plate (E) approximately in the plane of the mirror plane (G) or in parallel thereto additionally at least one structure (Q) which is designed in that it comprises at least one light source adapter with light source on top or / and on the underside of the base plate (E). Düseneinstellhilfe according to at least one of claims 1 to 9, characterized in that at least one of the light source adapter, a rigid support is mounted to make an angular adjustment and exact alignment by the end of the rigid support at a central location of the nozzle adapter (F) and / or the nozzle (B) at the intersection of all angles (N, M) is fixed. Method for improving the spraying in a surface treatment installation, characterized in that a nozzle setting aid (A) according to at least one of claims 1 to 10 is used for testing, positioning or / and adjusting at least one liquid spray nozzle (B) in a plant of the surface technology , Method according to claim 11, characterized in that, when checking, positioning and / or adjusting at least one nozzle (B) or / and at least one nozzle with at least one nozzle (B), the nozzle center line (D), the distance nozzle opening - object surface, the theoretical spray area (C), the actual spray area on sprayed object surfaces, the half angle (N) emanating laterally from the nozzle centerline (D), the total angle (O) between at least two preferably opposing light beams (J, P) or / and the overlap the spray area of a first nozzle is improved with the spray area of at least one other nozzle. Use of a system of surface technology with nozzles (B) and / or at least one nozzle with at least one nozzle (B), which is set with the nozzle setting (A) at least partially improved / are. Use of the objects coated in an installation of surface technology with nozzles (B) set at least partially improved and then further treated and / or the products produced by the method according to claims 11 or 12 in vehicle construction, as architectural elements in construction or for the manufacture of equipment and machines such as electrical appliances or household appliances.

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