WO2005090002A1 - Procede et dispositif pour peindre de petites pieces - Google Patents

Procede et dispositif pour peindre de petites pieces Download PDF

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Publication number
WO2005090002A1
WO2005090002A1 PCT/EP2005/051247 EP2005051247W WO2005090002A1 WO 2005090002 A1 WO2005090002 A1 WO 2005090002A1 EP 2005051247 W EP2005051247 W EP 2005051247W WO 2005090002 A1 WO2005090002 A1 WO 2005090002A1
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WO
WIPO (PCT)
Prior art keywords
section
trough
belt
painting
small parts
Prior art date
Application number
PCT/EP2005/051247
Other languages
German (de)
English (en)
Inventor
Werner Hunziker
Original Assignee
Walther Trowal Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Walther Trowal Gmbh & Co. Kg filed Critical Walther Trowal Gmbh & Co. Kg
Publication of WO2005090002A1 publication Critical patent/WO2005090002A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/025—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk
    • B05B13/0257—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk in a moving container, e.g. a rotatable foraminous drum

Definitions

  • the present invention relates to a method for painting small parts, in which pourable small parts are circulated in a machine in the area of the spray jet of at least one spray gun.
  • the small parts are coated in a suitable amount for coating in a coating drum, whereupon the drum is closed and driven to rotate the small parts.
  • the painting is carried out by a spray gun provided in the drum.
  • the spray jet is directed towards the heap formed in the area of the interior of the drum from the added amount of small parts, the heap surface facing the spray jet being formed, due to the circulation, from time-varying surface areas of various small parts.
  • the present invention is based on the object of developing a method of the type mentioned at the outset in a manner advantageous for use, so that a continuous painting operation with a continuous discharge of the Small parts is made possible with a layer of varnish applied as evenly as possible.
  • a separation of the small parts begins.
  • the degree of separation achievable until the spray gun is reached can be influenced, for example, by the choice of the length of the separation section and by setting the parameters which determine the linear conveying and the raid effect of the trough belt. It is not necessary that the separation of the small parts leads to an even isolated position of the same in extreme cases.
  • the degree of separation of the bulk material achieved when the painting section is reached is suitably matched to the nature of the small parts and the operation of the spray gun in such a way that when passing through the painting section, an all-round, as uniform as possible paint application to the small parts is created. It can be sufficient if the small parts, also depending on their shape and the distance covered by the conveyor Depending on the attack frequency, the spray gun passes in a two to three day shift, for example, but deviations are also possible. It may also be sufficient if the small parts are loosely and irregularly layered in several layers, so that they can still be counted or estimated by an observer despite the layering being largely exposed, despite the layering.
  • the extent of the separation is also expediently based on the fact that small parts which have been circulated in multiple layers can still be sufficiently flowed through by air from the air drawn off from the side facing away from the trough in the painting section, so that spray mist initially distributed in the painting section of the trough with the exhaust air the bulk material is still fed.
  • the bulk material advantageously acts like a filter, on which the spray mist that otherwise leads to contamination of the machine is deposited as the desired paint application. Analogously, this leads to the exhaust air being cleaned of paint particles that are undesirable therein before leaving the machine.
  • the exhaust air stream flowing around the pourable small parts is furthermore important for a desired drying as short as possible or at least drying of the lacquer layer on the small parts, so that the circulation does not cause any damage.
  • the spray gun can preferably be directed in a trough cross section of the trough belt with its spray jet onto a cross-sectional area of the trough belt that rises in the belt running direction, in particular near the rising trough side apex.
  • warm air can be blown into the trough in the separating section of the trough belt upstream of the spray gun by perforating bars of the trough belt there.
  • the warm supply air already brings about a heating of the pourable small parts to the painting section and their separation, so that the drying behavior in the painting section is further promoted.
  • warm air can also be blown into the trough in a drying section of the trough belt following the spray gun in the conveying direction, through which perforation of bars of the trough belt is possible, which air flows around the painted pourable small parts therein.
  • the exhaust air flow of the air drawn off in the painting section can also be dimensioned such that a vacuum is generated at least in the trough section assigned to the spray guns, so that spray mist does not escape from the side.
  • a trough belt is used for the method according to the invention, the edges of which are each guided around a circular disk parallel to a reference plane or around a ring parallel to the reference plane to form the trough, and that the conveying speed in the conveying direction is caused by difficulties of the Reference plane or the lateral guide elements lying parallel to the reference plane are adjusted by at least one or more pivot axes perpendicular to the conveying direction, reference being made to the following description for the function and preferred configurations.
  • the pourable small parts can also be reached unhindered by the spray jet of a fixed spray gun, and by pivoting the reference plane, if necessary, in one or more axes, the conveying speed of the small parts can - as will be explained below - vary in turn from the rotating speed of the Trough belt can also be set independently and sensitively.
  • the degree of separation or the layer height of the small parts in the trough formed by the trough belt can also be influenced in a targeted manner by a correspondingly adapted design and / or orientation of the ring at the end in the conveying direction and serving as an outlet connection. For example, to achieve a backflow in the trough and thus a greater layer height, the
  • Workpieces in particular the angle of rotation of the reference plane E or the cheeks around the horizontal axis of rotation, can be set negatively, preferably to approximately 6 ° negatively, as a result of which the spout is cut or the ring is inclined upward.
  • the spout is extended by a suitable amount in order to deliberately inhibit the flow of parts, which also simplifies the emptying of the machine.
  • the degree of separation of the pourable small parts in the painting section is influenced by a discharge orifice that can be changed in width.
  • This can, for example, be inserted into the conveyor section of the small parts at the end of the drying section and, depending on the passage width, can also form a barrage for the pourable small parts, the height of which results in a limited backflow for the defined setting of the degree of separation in the painting section.
  • the occasional use of such a discharge aperture and / or the aforementioned options for influencing the separation Degree of performance can also be useful, for example, when starting up the method according to the invention.
  • the invention also relates to a device for painting small, pourable parts, comprising a spray gun in a region of a circulating device, suitable for circulating the small parts as bulk goods during painting.
  • the present invention is based on the abe to further develop devices of the aforementioned known type in a manner which is advantageous in terms of use, so that they enable a continuous painting operation with a continuous discharge of small parts which are suitable for work.
  • the circulating device is an endless, flexible trough belt made of a multiplicity of parallel and suitable for separating the small parts by means of linear conveying and hold-up action, drivable transversely to the conveying direction
  • Rods has that the trough belt comprises a separating section preceding the spray gun in the conveying direction and a painting section assigned to the spray gun, rods of the trough belt having perforations at least in the painting section and an air suction device in the painting section on the side of the bars facing away from the trough Extracting air through the rods is provided.
  • the painting section becomes independent of whether the bulk material is continuously, is introduced into the device in batches or, if necessary, even in larger intervals, a continuous inflow of small parts is fed to the device, the surface of which is predominantly exposed. Because of the air suction in the painting section, which is also characteristic of the painting device according to the invention, as already mentioned, paint particles contained in an undesirably distributed spray mist are also initially used for painting.
  • the trough which is open in cross-section enables direct unimpeded access of the spray jet of the spray gun to the pourable small parts, the spray gun remaining accessible even during the circulation and painting operation (for example to change its setting) and independently of it the circulating device can be adjusted or moved, for example.
  • the spray gun of the device according to the invention can preferably have a number of different, interchangeable spray heads which are adapted to produce different spray patterns with, for example, a flat or round cross section. It is preferably provided that the spray gun is aligned in a trough cross-section with respect to the spray direction to a cross-sectional area of the trough belt rising in the tape running direction, in particular close to the rising trough side apex.
  • a plurality of spray guns are arranged side by side in the conveying direction.
  • at least one spray gun can be moved back and forth parallel to the conveying direction on a carriage having a drive, the travel speed preferably being significantly greater than the delivery speed and the spraying of the paint mist optionally taking place only in one or in both travel directions.
  • an outside section can be attached to the trough belt. closing preheater can be provided.
  • Preheating which is contact-free with respect to the trough belt can be carried out, for example, by heat radiation or, for example, inductively, but in contrast preferably by means of a warm air supply device, by means of which hot air is blown into the interior of the trough through a perforation of the rods which is then also provided in the separating section.
  • the trough belt can also include a drying section following the spray gun in the conveying direction with a perforation of bars there, in which a drying device, preferably a further hot air supply device, can be provided outside the trough belt.
  • the suction device has approximately twice the length in the conveying direction in relation to the warm air supply devices.
  • the edges of the trough belt for forming the trough are each guided around a circular disk parallel to a reference plane or around a ring parallel to the reference plane, the reference plane or the lateral guide elements lying parallel to the reference plane using at least one Heavy-duty device, in particular by means of two pivoting devices, about a pivot axis which is assigned to the respective heavy-duty device and is perpendicular to the conveying direction.
  • separating section, the painting section and the drying section are realized on a trough belt which is continuous in the conveying direction or alternatively on a plurality of trough belts which are arranged one behind the other in the conveying direction.
  • a first pivoting device can be used to make the reference plane more difficult to pivot about a horizontal pivot axis and a second pivoting device pivoting of the reference plane about a vertical pivot axis can be adapted.
  • One or more heavy-duty devices for remote adjustment can also each have an adjusting element which effects the pivoting movement and a transmission means by means of which the adjusting element can be remotely controlled from an actuating device.
  • a longitudinal piston and a transmission means a Bowden cable can be useful as an actuating element, but other aids with the same or a similar effect should also be considered.
  • guide elements can be provided on cheeks at the end in the conveying direction and parallel to the reference plane, and the cheeks can each be held in an intermediate frame so as to be rotatable about one of the two pivot axes.
  • the respective intermediate frame can in turn be held on a frame so as to be rotatable about the other of the two pivot axes, so that the projected intersection of the two pivot axes with respect to a trough belt cross section lies at least approximately in the center of the trough.
  • both swivel axes can run at least approximately in the edge plane, so that the trough always remains in the horizontal position when the swivel angle changes.
  • the trough belt has a multiplicity of parallel bars in the conveying direction, the ends of which are each connected to one of two continuous strands on the trough belt edge side, the ends about a first pivot axis parallel to the orbit and about a right angle to the first pivot axis , second Swivel axis are pivotally held.
  • This enables the rods to remain parallel to one another in the conveying direction even when the reference plane is pivoted out of a position perpendicular to the conveying direction, while at the same time permitting an axial displacement of the rods depending on the position on the circumference of the trough.
  • protruding hooks with a flat cross-section are fastened to the endless strands, each transverse to the orbit in the direction of the Mulderiband rod, each of which has a kinking one at the top within the flat plane , preferably have a tongue end that snaps against the direction of movement of the trough belt.
  • an insertion opening with a flat cross section to be formed on the trough strip rods in walls running at longitudinal end regions transversely to the longitudinal direction of the rod, by means of which the walls can each be pushed onto a hooking tongue and locked in the longitudinal direction of the rod by shifting in the circumferential direction of the trough strip ,
  • the spacing of the hooking tongues can be matched to the cross-section of the rods such that the gap, which may also be curved in cross-section, between two adjacent rods of the trough belt is of a smaller width than the total width of an intended perforation of the rods transverse to the longitudinal direction of the rod ,
  • a flow cross-section is thus established in the area of the bar walls that is smaller than that of the bar intermediate joints, so that the air supply and removal can be carried out uniformly over the bar walls through the perforation.
  • an adjustment device can be provided on at least one edge of the Mulderiband, which allows an adjustment of the distance between the two cheeks.
  • the cheek distance for the operation of the device can, for example, be set to a comparatively smaller dimension, as a result of which the tongue ends of the hooking tongues with respect to the longitudinal direction of the rod with a length reserve in a lateral form fit are held with the edges of the insertion openings of the rods having the flat cross section, so that the rods are secured against falling out or unintentional removal.
  • the adjustment device allows the cheek distance to be increased compared to the aforementioned distance, so that the hooking tongues only pass through the flat insertion openings with a short length, preferably only with the kinking end to prevent them from falling out, and the rods after they have been unhooked in the direction of rotation using, for example, a lateral play of the strands can be detached therefrom.
  • the order of the rows is reversed, bars can be easily installed on the strands at this distance from the cheeks.
  • the adjusting device has an eccentric which is held on the intermediate frame and can be rotated about one of the two pivot axes to adjust its distance from the cheek or the frame.
  • the bars can be aligned with a comparatively small distance with respect to their longitudinal direction, for example, by the fact that their opposite end regions, in particular on the end face, each form stops for counterstops on the strands and / or cheeks provided with play in motion.
  • the bars can be guided laterally with respect to the direction of rotation of the trough belt, for example by a large number of counter-stops which are each individually assigned to a bar end and are attached, for example in the form of a tab, to the lateral strands, for example to chains.
  • separate guide elements can also preferably be provided in the region of the trough, which are attached to the two cheeks in a fixed manner on the inside facing the trough and which form a continuous contact surface for a plurality of adjacent rod ends that are just passing by.
  • the rods forming the trough band are formed from a flat material, in particular from sheet metal, with a large number of small through openings. Such a perforation can, for example, extend over substantially the entire length or only over part of the length of the bar.
  • the width of a trough strip rod is preferably selected to be significantly larger than the cross section of a through opening and can in particular be a multiple thereof.
  • a single through opening can preferably have a round cross section, but alternatively also a flattened, polygonal or similar cross section.
  • the flat material in a cross-section of the rod of the trough has a straight central section, on which on one side, preferably in the direction of movement of the trough belt on the front side, a first edge section kinking at an acute angle to the underside of the central section and opposite it to the top of the Center section a V-shaped second edge section connects.
  • an automation device can be provided, by means of which an optionally predeterminable, coordinated control and / or regulation of the rotational speed of the trough belt and / or the swivel angle of the reference plane about the swivel axes and / or the spray device or spray gun and / or the Preheating device and / or the drying device, in particular also variable in time, is made possible.
  • an automated device can also be connected to or equipped with a computer and can be used to store and call up travel programs which are also variable in terms of requirements, with favorable settings of operating parameters being assignable to one another in the travel programs for particular paint jobs.
  • the term painting has a broader meaning that goes beyond the processing of so-called “paints”.
  • the term painting also includes the desired application of various types of coatings on the small parts.
  • coatings are preferably sliding coatings, for example lubricants for sealing rings, O-rings and the like, greases, for example silicone greases and other products, and also coatings made of corrosion protection agents, etc. into consideration.
  • sliding coatings for example lubricants for sealing rings, O-rings and the like
  • greases for example silicone greases and other products
  • coatings made of corrosion protection agents, etc. into consideration.
  • the term painting in its more general sense extends to coating, one can speak of a coating section instead of a painting section lying in the trough belt.
  • the invention also relates to a rod for a trough belt
  • Trough belt conveyor device in particular for a previously described painting device or for a previously described painting method.
  • the rod is based on the fact that it is formed from flat material, the cross-section of which has a straight central section, on which a first edge section that kinks at an acute angle to the underside of the central section and opposite it towards the top of the central section V-shaped second edge section is connected.
  • Flat cross section is formed, wherein the flat cross section extends at least approximately parallel to the central section.
  • the flat material in particular sheet metal, is provided with a large number of small through openings.
  • Fig. 1 in perspective schematically the device according to the invention for painting pourable small parts in a preferred embodiment
  • FIG. 2 shows in longitudinal view the device according to the invention for painting pourable small parts according to a further preferred embodiment, with the housing closed;
  • Figure 3 shows the longitudinal view of Figure 2, but with the panel removed.
  • FIG. 4 shows a side view in viewing direction IN according to FIG. 3;
  • FIG. 5 shows a side view in viewing direction N according to FIG. 3;
  • FIG. 5a shows a partial section along section line Na-Na in FIG. 5;
  • FIG. 6 shows a sectional view along section line NI - VI in FIG. 3;
  • Fig. 7 is a sectional view taken along section line VII - VH in Fig. 3;
  • FIG. 8 shows a detailed view in viewing direction VIII according to FIG. 6; 9 shows a partial section along section line IX-DC in FIG. 8;
  • FIG. 10 is a partial top view in viewing direction X according to FIG. 8;
  • FIG. 11 is a partial sectional plan view in the viewing direction XI according to FIG. 8;
  • Fig. 12 is a perspective view of the arrangement shown in Fig. 8;
  • FIG. 13 shows a schematic side view of a device for pivoting the reference plane about a horizontal axis
  • FIG. 14 shows an enlargement of the detail XIV-XTV in FIG. 13;
  • 15 shows a schematic plan view of a device for pivoting the reference plane about a vertical axis
  • FIG. 16 shows an enlargement of detail XVI - XVI in FIG. 15;
  • FIG. 17 shows a plan view of an adjusting device for cheek distance adjustment in viewing direction XVII from FIG. 6, on the other hand enlarged;
  • FIG. 18 shows a side view of a spray gun enlarged in comparison to FIG. 3 in a preferred embodiment
  • FIG. 19 is a front view of the spray gun in the viewing direction X C according to FIGS. 18 and
  • FIG. 1 schematically shows in a perspective the device 1 according to the invention in accordance with a preferred embodiment for painting pourable small parts 2.
  • the device 1 comprises a spray gun 3 which is attached to a holder (not shown in the drawing in FIG. 1) in a painting section L of a suitable for circulating the small parts 2 during the painting circulating device 4 is attached.
  • the circulating device 4 has an endless, flexible trough belt 5 which can be driven transversely to a conveying direction F and consists of a multiplicity of parallel bars 6, the ends of which are held in an articulated manner on endless strands 7.
  • the strand 7 lying in the viewing direction on the left, ie at the beginning of the conveying path, is around a circular disk 9 parallel to a reference plane E and that in the BHc-k direction on the right, ie at the end of the Conveying route, lying strand 7 around a ring 10 also parallel to the reference plane E in a circular cross section.
  • a guide roller 11 and two guide rollers 12 are provided for guiding the trough belt 5 within a cross section parallel to the plane E on both sides, and, as explained below, with the associated circular disk 9 or the Ring 10 are held on cheeks 14 parallel to the plane E.
  • the reference plane E coincides with a surface or extension of one of the two parallel cheeks.
  • a pivoting of the cheeks 14 accordingly also leads to a pivoting of the reference plane E.
  • the reference plane E or the cheeks 14 parallel to it can be pivoted about two axes X, Z which are perpendicular to the conveying direction F and at the same time perpendicular to one another , wherein, starting from a reference plane perpendicular to the conveying direction F, a swivel angle ⁇ about the horizontal axis X and a swivel angle ⁇ about the vertical swivel axis Z can be removed.
  • a sales pivoting about one or both of the above-mentioned axis of gravity causes the rods 6 at the same time when the trough belt 5 is driven in the circumferential direction, that is to say transversely to the conveying direction F. experience a movement depending on its circumferential position, and thus oscillating via a revolution, in the conveying direction F, which is made possible by the said articulated mounting of the rods 6 on the strands 7.
  • Small parts 2 to be painted which are initially located in the base of the trough 8, are raised by such a multidimensional movement of the rods 6 on the one hand in order to the U direction until further entrainment by gravity is prevented and they are lowered again by the resulting attack effect rods 6 lying in the trough fall.
  • the increasing entrainment in the circumferential direction U up to the hold-up also caused a proportionate linear conveying movement in the conveying direction F, so that with repeated repetitions of Au and relapse, a zigzag or Spiral movement results, by the horizontal portion of which the pourable small parts 2 pass through the circulating device 4 in the conveying direction F.
  • a trough belt which causes a linear conveying and an overlapping, is also suitable for separating the small parts. If, as indicated in FIG. 1 at the beginning of the conveying line, a comparatively large amount of pourable small parts 2 are poured onto the trough belt 5, for example tipped over, this leads to a quasi outflow movement while the pile is circulating of small parts 2 comes in the direction of conveyance F.
  • the gradual run-out or the quasi-stretching of the pile in the conveying direction F results in a gradual separation of the small parts 2 with the conveying path, which in the conveying direction F also results in a continuous decrease in the number of layers formed by the small parts 2 or their number per area brings itself.
  • a degree of separation with a largely exposed surface is achieved, which is necessary for painting the small parts 2 is suitable in the subsequent painting section L by means of the spray gun 3.
  • the painted small parts 2 are conveyed through a transport or drying section T to the end of the circulating device 4, from where in the selected example the finished small parts 2 emerge from the painting device through the sleeve-like ring 10.
  • a ring having an open cross section can also be provided at the beginning of the conveyor path instead of the closed circular disk 9 proposed in FIG. This would in particular also give the possibility of preferably giving long, slender components in the longitudinal direction through said ring into the trough of the trough belt, ie feeding them to the trough in the axial direction.
  • the paint spray jet of the spray gun 3 is aimed at small parts 2 in the region of the rising side crest 15, so that the period of time that then follows during the subsequent downward movement is also available for drying the paint layer.
  • FIG. 2 shows a longitudinal view of the device 1 according to the invention in a further preferred embodiment.
  • the device has a closed outer housing 17, which surrounds an arrangement comparable to FIG. 1, consisting of a circulating device with a spray gun.
  • a feed opening 18 is shown, through which pourable small parts can be fed to the circulating device evenly or in batches, for example by tipping, at the beginning of the conveying path.
  • the small parts that have passed through the feed opening 18 slide down on a slope 19 in the direction of the base of the trough.
  • Along an upper housing section there are two adjacent viewing windows 20 which can be swiveled upward and through which the circulation and painting process can be observed.
  • two actuating devices 21, 22 are arranged in the form of rotary levers, by means of the respectively assigned pivoting devices, the reference plane E or the cheeks 14 can be rotated synchronously around a respective pivot axis.
  • the sleeve-like ring 10 On the right-hand edge in the viewing direction, ie at the end of the conveyor line, the sleeve-like ring 10 can also be seen, through which the painted small parts are discharged.
  • FIG. 3 likewise shows the viewing direction selected in FIG. 2, but the outer housing 17 has been removed in a different manner.
  • a pivoting setting of the reference plane E is selected, in which the plate-shaped cheeks 14 are oriented perpendicular to the conveying direction F.
  • the view in a lower region initially falls on a band section lying in front of the trough, while above the associated apex line 23 the band section rising from the trough on the back is visible.
  • a frame 24 emerges and a motor 38 for rotating two drive rollers 11 (cf. FIGS. 6, 7) coupled by universal joint rods is held.
  • the motor 38 is attached to the left cheek 14, which is concealed in FIG. 3, so that it can follow all movements in the wiricle settings.
  • the drive rollers as well as guide rollers 12 lying in the same plane have in the selected embodiment, a toothing which is in engagement with the strands 7 formed here as chains.
  • the drive and guide rollers, as well as the circular disk serving for trough shaping and the cheeks 14 which hold the ring in rotation, are gimbaled (in the viewing direction of FIG. 3) in the frame sides in an upright position, whereupon in connection with FIGS. 13 to 16 even closer is received.
  • the reference plane E or the cheeks 14 can be adjusted by remote adjustment by rotating the actuating device 21 about the horizontal pivot axis X and by rotating the actuating device 22 independently thereof about the vertical pivot axis Z by means of intermediate Bowden cables 25, 26 be pivoted.
  • the actuating devices 21, 22 act via the Bowden cables 25, 26 on the cheek 14 located on the left in the viewing direction, while push rods 27, 28 assigned to the respective pivoting devices are provided for synchronization with the right cheek.
  • the position and orientation of the spray gun 3 are held on the frame 24 at about half the length in the conveying direction F with an adjustable stand arm 29.
  • the spray gun 3 In the longitudinal or conveying direction of the circulating device, the spray gun 3 is assigned a painting section L in which the painting of the small parts (not shown in FIG. 1) takes place.
  • the width of the spray jet is matched to its length or a part thereof, as is also the case with evü. several spray guns arranged side by side, their number and distance.
  • the separating section V is arranged upstream in the conveying direction F, while a drying section T then extends to the painting section L.
  • FIG. 1 In the exemplary embodiment shown in FIG.
  • the rods 6 of the trough belt 5 have fine holes which are uniformly distributed over the entire length, as is shown schematically by way of example in the enlarged section "X". is acceptable.
  • they are used to extract air or an air / paint mist mixture from the trough 8 by means of an air suction device 30, which is averted from the underside and rear of the trough belt.
  • an air suction device 30 which is averted from the underside and rear of the trough belt.
  • hot air if necessary also at different temperatures and amounts, can be blown into the trough through the holes 16 (cf. also Figures 4, 6 and 7).
  • FIG. 4 shows the device according to FIG. 3 in a side view according to viewing direction IV.
  • the cheek 14 thus visible is first held in an intermediate frame 34 by means of a pivot bearing 33 rotatable about the vertical pivot axis Z-Z, while the intermediate frame 34 in turn is pivoted about that by means of pivot bearings 35 horizontal pivot axis X - X is rotatably supported on the frame 24.
  • a pivot bearing 36 is arranged within the cheek plane for mounting a circular disk 9 (see FIG. 1) on the back, which serves to guide the trough belt 5 in the region of the trough 8.
  • Further rotary bearings 37 are assigned to guide rollers 12 of the trough belt 5.
  • the motor 38 is assigned to the two drive rollers 11, which can in principle also be seen in FIG.
  • the drive roller 11 assigned to the cheek 14 visible in FIG. 4 can in particular be driven directly by the motor.
  • An air extraction pipe 39 assigned to the air suction device 30 and air supply pipes 40, 41 assigned to the warm air supply devices 31, 32 are passed through a recess in the cheek 14.
  • FIG. 5 shows the device 1 in a side view opposite to FIG. 4 in viewing direction V according to FIG. 3.
  • the rotary bearings assigned to the guide rollers 12 are also identified here with reference number 37.
  • the one at this term cheek 14 arranged (hidden in the direction of view) drive roller 11 is associated with a rotary bearing 42, the respective drive rollers 11 of the two cheeks 14 for torque transmission are connected by means of a (not shown in the drawing) propeller shaft.
  • the ring 10 which is used to guide the trough belt 5 and through its inner opening for the discharge of small parts 2, is rotatably received in a through opening of the cheek 14 by means of three support rollers 43 evenly distributed on the circumference.
  • FIG. 5 a shows that the support rollers 43 each have a groove 44 on their circumference, into which a projection running around the outside of the ring 10 engages to achieve an axial positive fit.
  • a comparable support can also be provided at the beginning of the conveying path or the trough belt on an annular entry sleeve which is open there in cross-section instead of the closed circular disk shown in the figures.
  • FIG. 6 shows a sectional view along sectional plane VI - VI in FIG. 3 a cross section of the device 1 within the separating section V.
  • the trough belt 5 is shown in a simplified manner, in particular without drawing resolution of individual bars, while details in this regard Figures 8 to 12 can be seen. Nevertheless, it is indicated that the trough belt 5 with its two peripheral strands 7, here formed as a chain, is in toothed engagement with the respective drive rollers 11 and guide rollers 12.
  • the ring 10 and the circular disk 9 attached to the opposite cheek 14 have no toothing on their respective outer guide circumference.
  • FIG. 6 shows that the warm Air supply device 31 is connected to the trough belt 5 of the trough 8 on the underside and rear side.
  • a box-like housing 47 is provided which tapers like a funnel underneath an air guide grille 48 inserted up to the connection cross section on the air supply pipe 40.
  • the second warm air supply device 32 assigned to the drying section T (cf.
  • FIG. 3 has a comparable structure with a connection to the air supply pipe 41. Furthermore, the air suction device 30 shown in FIG. 7 in a cross section of the painting section L is constructed in a similar manner.
  • an adjusting device 49 is attached on the top and bottom, which adjusts the distance between the opposing cheeks 14, in particular for easy assembly and disassembly of Allow rods 6 of the trough belt 5 (see also FIG. 17). To increase the distance adjustment range, such adjustment devices can also be provided on the opposite cheek 14.
  • An adjusting device 49 represents a connection between a cheek 14 and the intermediate frame 34 which is adjustable with regard to the lateral distance.
  • a bracket 51 extends from the holding plate 50 and has a circular opening, into which a rotating part 52, which in the example is made of plastic, is rotatably inserted with a section 53 which is offset to match the diameter of the opening.
  • the rotating part 52 in turn has a bore which extends eccentrically to its axis of symmetry and through which a pin 55 held on the intermediate frame 34 engages in a form-fitting manner. The distance between the cheek 14 and the intermediate frame 34 can thus be set by rotating the rotating part 52 mounted in the bracket 51.
  • the rotating part 52 thus constitutes an eccentric (eccentricity "e") which is also held on the intermediate frame by the pin 55 and which is rotatable about the pivot axis Z-Z of the pivot bearing 33, while on the other hand also the possibility of securing a selected rotational position consists.
  • the preferred construction of the trough belt is described in more detail with reference to FIGS. 8 to 12.
  • 8 shows a section of the trough belt 5 in the viewing direction Vm according to FIG. 6.
  • the rods 6 parallel in the conveying direction F are each connected at their ends to an endless strand 7, which in the selected example is formed from a double roller chain 56.
  • the further chain track 58 is designed on one side, facing the bars 6, with special tabs 60 on the end.
  • a holding part 62 is screwed onto a special tab 60 by means of a screw 61, from which a hooking tongue 63 protrudes transversely to the direction of rotation U in the direction of the Mulderiband rod.
  • the tongue ends 64 bend in the selected installation position against the circumferential direction of movement U of the trough belt 5.
  • an insertion opening 66 with a flat cross-section is formed in each case in walls 65 extending transversely to the longitudinal direction of the bars, which walls 65 can be pushed onto a hooking tongue 63 and then in the longitudinal direction of the bar by shifting in the circumferential direction U of the trough belt 5 can be locked.
  • the holding part 62 has a tongue 67 which engages in a form-fitting manner between the ends of two chain bolts 57 to prevent rotation.
  • FIG. 11 and 12 also make it clear that the rods 6 of the trough belt 5 are formed from a flat material, here from sheet metal, with a large number of small through openings 68.
  • FIG. 11 shows in particular that the flat material has a straight central section 69, on which on one side a first edge section 70 which bends at an acute angle to the underside and on the opposite side a V section which is closed towards the top Shaped second edge section 71 connects.
  • FIGS. 8, 9 and 12 are based on an adjustment of a comparatively small distance between the cheeks 14, selected by the adjusting device 49 shown in FIGS. 6 and 7, for example, in which the hooking tongues 63 pass through the walls 65 with such a large length reserve that it is not possible to unhook bars 6. With this setting, there is only a slight distance between the tabs 60 of the double roller chain 56 and the end face of the bars 6, so that the bars 6 are aligned in their longitudinal direction except for a slight amount of movement.
  • FIGS. 13 to 16 schematically show the arrangement and mode of operation of the two pivoting devices which serve to pivot the reference plane E or the two cheeks 14 about the horizontal pivot axes X-X and the vertical pivot axes Z-Z.
  • FIGS. 13, 14 relate to a side view lying in the viewing direction of FIGS. 2, 3, in which a pivoting movement with the angle about the respective horizontal pivot axes X-X is visible.
  • the vertical uprights of the frame 24 and the two intermediate frames 34 which are at the front in the viewing direction, are shown removed or broken out above their lower ends.
  • a rotation effected on a rotary lever of the actuating device 21 is transmitted from a Bowden cable 25 to a corresponding retracting or extending movement of a piston 72, which can be moved in a cylinder 73 held on the frame 24.
  • the piston 72 acts in an articulated manner on the intermediate frame 34, so that the necessary angular compensation is made possible.
  • the cheek 14 rigidly received with respect to the axis X-X is also pivoted about the axis X-X.
  • a corresponding pivoting movement of the cheek 14 about the axis X - X is transmitted synchronously to the cheek 14 on the right in the viewing direction, in that both intermediate frames 34 are connected by a push rod 27 which is articulated thereto.
  • the cheeks 14 are pivoted about the vertical pivot axes Z-Z in an analogous manner.
  • the actuating device 22 is used, which is connected via a Bowden cable 26 to a cylinder 74 held on the frame 34 or a piston 75 guided longitudinally therein.
  • the piston 75 articulates on the cheek 14. While an adjustment of the actuating device 21 rotates the frame 34 together with the cheek 14, an adjustment of the actuating device 21 causes the cheek 14 to be pivoted relative to the intermediate frame 34 only.
  • the two cheeks 14 are also synchronized with regard to the pivoting movement about the vertical axis Z-Z provided by a push rod 28 articulated on both sides.
  • the angle of rotation about the horizontal pivot axis can be set around the starting position by an interval of preferably -10 ° to + 10 °, while the interval of the angle ⁇ can be, for example, -6 ° to + 6 °.
  • the actuating devices 21, 22 arranged within easy reach of the viewing window 20 offer the possibility of adjusting the linear conveying and hold-up effect of the circulating device by adjusting the angles ⁇ and / or ⁇ during the painting operation in such a way that a good painting result is obtained.
  • the horizontal position of the trough 8 is retained when the angles ⁇ and / or ⁇ are adjusted.
  • the necessary Wi angle compensation of the rods 6 of the trough belt relative to the strands 7 leading them on the cheeks 14 is made possible in that the insertion openings 66 of the rods 6 relative to the hooking tongues 63 (cf. FIG. 12) are dimensioned correspondingly larger for a required movement play - are. In the exemplary embodiment shown, this results in the bar ends being difficult in each case about a first axis parallel to the orbit U and about a second pivot axis perpendicular thereto.
  • FIG. 18 shows a side view of the spray gun 3 enlarged compared to the preceding figures.
  • Connections 77 are provided on its housing 76 for the supply of spray paint, control air and atomizing air.
  • a mixture of atomizing air and paint emerges as a spray jet from a central outlet opening 79. Air can be blown in as needed to shape the spray jet through outlet openings 80 which are inclined thereto.
  • the possible painting operation of pourable small parts 2 is shown in FIG.
  • the spray jet of the spray gun 3 is directed at the small parts 2 to be painted in the region of the rising side crest 15 up to which the small parts 2 are carried upwards by the trough belt.
  • the resulting movement of the small parts 2 in the cross section of the trough 8 during the circulation is indicated in a simplified manner by solid arrows.
  • the guidance of the exhaust air from the air suction device 30 is indicated by dashed arrows.

Landscapes

  • Spray Control Apparatus (AREA)

Abstract

L'invention concerne un procédé servant à peindre de petites pièces, selon lequel de petites pièces déversables sont brassées dans une machine dans la zone du faisceau de pulvérisation d'au moins un pistolet pulvérisateur. L'invention vise à perfectionner un tel procédé quant à son utilisation. A cet effet, les petites pièces (2) sont versées sur des lamelles (6) d'une bande en auge (5) qui les sépare par transport linéaire et effet de déversoir, et elles sont transportées à travers une section de séparation de la bande en auge (5) dans une section de mise en peinture (L), dans la zone du faisceau de pulvérisation du pistolet pulvérisateur (3). Dans cette section de mise en peinture (L), l'air est aspiré du côté opposé à l'auge (8) à travers des perforations présentes dans les lamelles (6). L'invention concerne également un dispositif convenant à l'exécution du procédé selon l'invention, ainsi qu'une lamelle pour une bande en auge d'un convoyeur à bande en auge, notamment pour le dispositif ou le procédé susmentionnés.
PCT/EP2005/051247 2004-03-19 2005-03-17 Procede et dispositif pour peindre de petites pieces WO2005090002A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004013515.0 2004-03-19
DE200410013515 DE102004013515A1 (de) 2004-03-19 2004-03-19 Verfahren und Vorrichtung zum Lackieren von Kleinteilen

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WO2005090002A1 true WO2005090002A1 (fr) 2005-09-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006076429A1 (fr) * 2005-01-12 2006-07-20 Wheelabrator Group, Inc. Ensemble element intermediaire et palette pour machine de decapage par projection d'abrasif
WO2024134409A1 (fr) * 2022-12-20 2024-06-27 Techno Surface Sas di Bulli Elisabetta & C. Machine et procédé de traitement à la vapeur de surfaces

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037553A1 (de) 2008-11-14 2010-05-20 Walther Trowal Gmbh & Co. Kg Vorrichtung und Verfahren zur Behandlung von Teilen
DE102010030232B4 (de) 2010-06-17 2014-12-18 Diener Electronic Gmbh & Co. Kg Kleinteilebeschichtungsanlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305451A (en) * 1940-05-17 1942-12-15 American Foundry Equip Co Apparatus for treating metal articles
GB743107A (en) * 1952-11-28 1956-01-11 Pangborn Corp Conveyor construction for tumbling articles
US3390487A (en) * 1965-12-23 1968-07-02 H O Canfield Company Inc Belt insert strip for shot blasting machine
US4218854A (en) * 1976-07-20 1980-08-26 Werner Hunziker Apparatus for transport and simultaneous surface-treatment of discrete commodities
EP0609661A1 (fr) 1993-02-03 1994-08-10 Werner Hunziker Dispositif pour transporter et retourner en continu des pièces à usiner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305451A (en) * 1940-05-17 1942-12-15 American Foundry Equip Co Apparatus for treating metal articles
GB743107A (en) * 1952-11-28 1956-01-11 Pangborn Corp Conveyor construction for tumbling articles
US3390487A (en) * 1965-12-23 1968-07-02 H O Canfield Company Inc Belt insert strip for shot blasting machine
US4218854A (en) * 1976-07-20 1980-08-26 Werner Hunziker Apparatus for transport and simultaneous surface-treatment of discrete commodities
EP0609661A1 (fr) 1993-02-03 1994-08-10 Werner Hunziker Dispositif pour transporter et retourner en continu des pièces à usiner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006076429A1 (fr) * 2005-01-12 2006-07-20 Wheelabrator Group, Inc. Ensemble element intermediaire et palette pour machine de decapage par projection d'abrasif
WO2024134409A1 (fr) * 2022-12-20 2024-06-27 Techno Surface Sas di Bulli Elisabetta & C. Machine et procédé de traitement à la vapeur de surfaces

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