EP1329264A2 - Method and apparatus for processing objects, in particular for coating objects - Google Patents

Abstract

The coating roller (1) has a coating surface to be brought into contact with the workpiece (3) whereby a coating medium is supplied from a supply device (6) to the coating roller. The workpiece is supported by a pair of support rollers. One of the support rollers can be the coating roller. A second coating roller can be provided spaced from the first and forming a second coating surface. The device can include a transport chain.

Description

The invention relates to a method and a device for processing, in particular Coating of workpieces.

The coating of rotationally symmetrical and in particular hollow cylindrical workpieces, e.g. to prepare the surfaces concentrically arranged, with each other cylinder to be connected by a vibration-damping material, such as e.g. as Engine suspensions or shock absorbers are required in vehicle construction conventionally, for example, by means of a conveyor chain be introduced into a coating device in which a corresponding Coating medium sprayed onto the workpieces or against the workpieces is whirled. The thickness of one that is deposited on the respective workpiece Layer can, for example, in the dwell time of the workpiece the coating device can be controlled. The interior of such Coating device must be cleaned from time to time, as the whirled up or sprayed coating medium not absorbed by the workpiece partially stuck in the interior of the coating device. The productivity such devices is largely dependent on the drying time of the Coating medium is determined and is slow drying or curing Coating media comparatively low.

As an alternative to such spray or fluid coating devices, it is possible to apply the coating medium to the workpieces by coating rollers. However, the surface quality of the coatings produced in this way will on the size of the workpieces and the speed of the coating roller affected. The coordination of appropriate systems requires special care.

The invention has for its object a method and a device for processing, in particular coating of in particular cylindrical workpieces to create through which also within the framework of a largely automated Machining, especially coating process with high productivity qualitatively high-quality coatings of the respective workpieces can be achieved.

This object is achieved according to the invention by a method with the specified in claim 1 Features solved and by a device with the features of Claim 8. In this way it is very advantageously possible to determine the number of workpiece holders depending on the number of processing, especially coating steps taking into account one between two coating processes drying process (treatment station) to be determined exactly.

In an advantageous manner, it becomes possible for the workpiece to be coated during the coating with the coating medium is stable and low-vibration store and the coating roller defined with the workpiece surface inside To get in touch. The workpiece wobbles in a reliable manner prevented. Even large and comparatively heavy workpieces can be compared rotated at high speed and coated reliably.

The support roller pair arrangement contains for carrying out a workpiece outer coating for the workpiece held on a mandrel, for example, according to a preferred embodiment of the invention at the same time a for coating coating roller provided for the coating medium. Form preferably both rollers of the support roller pair arrangement of coating rollers. The two Rollers of the support roller pair arrangement preferably rotate with the same Circumferential speed. The product supply of the coating material to the two Coating rollers of the pair of coating rollers can, e.g. by a transfer roller can be controlled independently and individually for each roller.

To carry out a workpiece inner coating is in addition to the support roller arrangement a separate one and retractable into the workpiece, e.g. also provided independently rotating drivable coating roller.

The workpiece to be coated is rotated during the coating process, either by frictional entrainment on the support and / or coating roller pair arrangement or forcibly by either with the support and / or Coating roller pair arrangement coupled or separate drive device for the coating roller. The drive torque is preferred frictionally transmitted via a coupling device acting on the workpiece. Such a coupling device preferably consists of one the workpiece on the circumferentially engaging pair of rollers or an inside or front on the workpiece engaging spindle device. A corresponding pair of roles can be formed by the support roller pair arrangement itself or separately therefrom his. A corresponding spindle device is preferably also as Workpiece holding device (mandrel) effective.

According to a preferred embodiment of the invention, the coating medium supply device has a roller element, the longitudinal axis of which is essentially runs parallel to a longitudinal axis of the coating roller, the roller element has a peripheral surface in contact with the coating roller is feasible. This makes it possible in an advantageous manner The coating medium provided for the workpiece coating is evenly distributed deliver the coating roller. This roller element preferably has one elastic, possibly highly absorbent outer coating.

An advantageous one with regard to a particularly uniform coating of the workpieces Embodiment of the invention is given in that a second coating roller is provided, which is spaced from the first coating roller is preferably arranged axially parallel and the one second coating surface forms, which can be brought into contact with the workpiece. The two coating rollers are preferably arranged such that the workpiece in the gusset formed between the two coating rollers on the two Rolls rests and is centered automatically. A particularly reliable one automatic centering of the workpiece is achieved in that the distance between the coating areas of the two coating rollers approx. 10 to 30% is smaller than the diameter of the workpiece. This is preferably roller-shaped Coating element for the simultaneous transfer of the coating medium arranged symmetrically below the pair of support and coating rollers.

The first and the second coating roller are advantageously by means of a Drive device driven in the same direction. This will be advantageous the workpiece to be coated is rotated by the two coating rollers added. This ensures a particularly even application of the coating medium on the workpiece surface corresponding to the coating rollers guaranteed. According to a preferred embodiment of the invention, the driven both coating rollers in such a way that, based on these coating surfaces, result in the same peripheral speeds. Alternatively, it is however, it is also possible to adjust the speeds of the coating rollers accordingly or also by appropriate dimensioning of the diameter the respective coating roller slightly different peripheral speeds to realize, causing a certain amount of circumferential slip between the workpiece and the coating areas of the respective coating roller is reached. This can further improve the adhesion of the coating medium.

The support of the workpiece on the support roller pair arrangement, which is preferred at the same time a pair of coating rollers for the external coating of a cylindrical one Forms workpiece, enables a position-stabilized coating and reliable Fixation of the rotating, cylindrical configurations Workpiece. As a result, a double job on the workpiece, i.e. doubled Layer thicknesses (e.g. a heavy-duty primer) on the workpiece can be achieved.

According to a likewise preferred embodiment, the at least one coating roller (or the pair of coating rollers) a profiled surface and thus also have a profiled coating geometry, it being without production-related annoying covers or the like is possible, only one certain circumferential section (or partial cylinder surface) of the entire lateral surface to coat the workpiece with very precise limitation. This is particularly so important for cases in which only a further partial coating of the workpiece later another area of the workpiece but of coatings or Lanyards - e.g. for vulcanizing rubber locks for shock absorbers - should remain free.

According to a preferred embodiment of the invention is a coating medium supply device also intended to supply a coating medium the second coating roller. The one fed to the respective coating roller The quantity flow of coating medium can advantageously be set separately in each case. This can influence the structure of the in a particularly sensitive way be taken on the coating formed on the workpiece. Because usually both over the first coating roller and over the second coating roller the same coating medium is applied to the workpiece , it is possible to use the feed device for feeding the coating medium to be used for both coating rollers.

According to a preferred embodiment of the invention, the feed device points a transfer roller in contact with at least one of the coating rollers is feasible. The diameter of this transfer roller is according to a preferred one Embodiment smaller than the diameter of the assigned coating roller. The transfer roller rotates at a higher speed than the coating roller, which ensures a particularly smooth transition of the coating medium is reached on the coating roller.

The supply device for the coating medium is according to a preferred one Embodiment of the invention provided with a medium receiving area, in which the coating medium is stocked with. This recording area forms in a preferred embodiment of the invention, a sump for the coating liquid (especially adhesive or primer for later elastomer coatings), in which a transfer device cooperating with the transfer roller dips. This transfer device consists of, for example Rotating roller that can be brought into contact with the transfer roller for transferring the coating medium from the swamp to the transfer roller. Alternatively, the Transfer device can also be formed, for example, by an elastic band is clamped onto a corresponding pair of rollers.

A particularly in view of a particularly cheap cleaning or maintenance The advantageous embodiment of the device according to the invention is given by that the supply device for the coating fluid in a housing trough is recorded and the sump is formed in the lower region of the housing trough.

This advantageously makes it possible for the feed device to be simple Way to change.

According to a particularly preferred embodiment of the invention, at least one of the coating rollers or the rollers of the support roller pair arrangement in essentially vertical direction, in particular in cycles, can be raised or lowered. This makes it possible to place the coating device below a transport path, along which the workpieces to be coated are transported, lower and the coating rollers only directly for coating the Approach the workpiece as soon as the corresponding workpiece is in a processing position. On the part of the coating roller in The distance covered in the vertical direction is dimensioned such that the coating roller a subsequent transport movement in the lowered position the workpieces are not hindered. The formation of any streaks on the workpiece surface through an uncontrolled contact of the workpieces with the coating rollers when switching on is avoided.

Of course, the entire coating unit, consisting of one lower material pick-up roller, the transfer roller and the coating or Support roller pair - also in connection with the surrounding housing - vertically be arranged movably.

This makes it possible to constantly coat the coating rollers with the one assigned to them Keep the transfer roller in contact. The transfer roller can both during the workpiece coating process, i.e. while the coating roller is in contact with the workpiece to be coated, as well as in lowered Position the coating roller.

In another embodiment of the device with at least two for coating Coating rollers provided on a workpiece are these two Coating rollers arranged at slightly different height levels. This ensures particularly stable guidance of the workpiece to be coated reached between the two coating rollers. The two coating rollers are preferably arranged such that the touch contact portion between Coating roller and workpiece relative to the axis of rotation of the coating roller or support roller is arranged such that a connecting line through the Touch contact section and the axis of rotation relative to the horizontal one Includes angles in the range of 30 to 60 °. Angles in the range between 30 and 45 ° have proven to be particularly advantageous for comparatively light workpieces. Angles in the range between 45 to 60 ° prove to be larger or heavier Workpieces as advantageous.

The coating surface of the coating roller is advantageously made of one Soft material, in particular a foamed rubber material. It it is also possible to coat the coating roller with an absorbent coating To provide textile material for the storage of the coating liquid.

One for forming an inner coating of a substantially hollow cylindrical Workpiece advantageous embodiment of the device is given by that the coating roller is formed by a roller whose outer diameter is smaller than the inside diameter of the interior area to be coated of the workpiece. For this purpose, the coating roller is designed such that it is in the inside of the workpiece can be inserted. This will make it beneficial Possible way, the inner surface of the workpiece evenly with the coating liquid to coat. Here too, of course, there is a profiled geometry (e.g. different diameters and / or in the axial direction) from each other spaced application sections (separated by ring grooves) of the inner coating roller possible if not all that can be covered by the coating roller Inner surface of the workpiece to be coated.

The workpiece to be coated is advantageously rotatably supported. This is According to a preferred embodiment of the invention, a holding device is provided, wherein the holding device has a holding mandrel on which the workpiece is attachable. To apply an inner coating, it is also possible to apply a rotating one Storage of the workpiece to provide a pair of support rollers on which the respective workpiece is placed.

Is the hollow cylindrical workpiece for external or internal coating vertical to Frictional contact with a drive and / or outer coating roller pair is moved it is also sufficient to simply use fixed support domes instead of application rolls Provide workpiece support in the lower position.

The aforementioned Haltedom is particularly suitable for training a workpiece outer coating. The pair of support rollers enables reliable Support of the workpiece in the frame for an inner surface coating. The Haltedom or the pair of support rollers are advantageously with a drive device coupled so that the workpiece is forcibly with a predetermined, especially the peripheral speed of the coating roller or coating rollers is rotated at a coordinated speed and via the holding device can be rotated. The transmission of the drive torque For example, the workpiece can be frictionally engaged over the two Support rollers take place. Especially when using the holding mandrel as a holding device it is also possible to use a conical clamping device Centering mandrels to be provided, through which the coating roller on the holding mandrel is firmly clamped.

According to a preferred embodiment of the invention, the holding device is in a transport device integrated. This transport device is advantageous Formed by a round table. There are a number of holding mandrels at this rotary table or support roller pairs are provided, which are substantially radial to the axis of rotation of the rotary table are aligned. This will make it beneficial possible, arranged radially aligned along the circumference of the rotary table Workpieces successively in the work area, preferably in cycles to the Introduce workpieces moving coating device. The one in the coater coated workpieces can subsequently in one Drying oven and after leaving the drying oven, if necessary, again in the coating device be introduced until the formed on the workpieces Layer thickness has reached a predetermined thickness. It is also possible to do that too coating workpieces before entering the coating device for the first time preheat in the drying oven, which makes a particularly uniform Application of the coating medium in the coating device results.

As an alternative to the rotary table described above or in combination it is also possible to form the transport device by means of a transport chain. The workpieces to be coated are preferred on the transport chain so aligned that the longitudinal axis of the workpieces transversely to the direction of transport the transport chain runs. The transportation chain is through a multitude articulated chain links formed. The transport chain is preferred by one guided by guide rollers formed guide. The on the Holding devices attached to the transport chain are preferably designed such that the workpieces to be coated in the area of the deflection rollers from the actual Chain conveyor can be swung out. The mandrels are for this connected to the transport chain via a short articulated lever. The Holding pins are aligned in such a way by the short articulated lever on the Transport chain held that the central axis of the holding mandrels are essentially parallel extends to a deflection axis of the transport chain.

According to yet another preferred embodiment of the invention, the Workpiece carrier in the rotary table (e.g. essentially when picking up the workpieces parallel to the axis of rotation of the rotary table for workpiece treatment in Spray coating stations) also along several partial circles (preferably "on Gap ") can be arranged so that both an even and an odd number Number of workpiece receiving stations can be provided.

When using a rotary table transport device, according to a particularly preferred embodiment of the invention, the workpiece receptacles arranged in succession along a pitch circle are provided in an odd number. The number Y of workpiece holders is preferably in accordance with the equation Y = ((m • n • o • p ...) • x) + 1 or Y = ((m • n • o • p ...) • x) - 1 determined, where: x = 1, 2, 3, 4 ... x ε N \ {0} m, n, o, p = number of possible treatment and / or machining operations, ie number of revolutions that a workpiece runs through to completion.
eg Y = ((2 • 3 • 4) • 3) -1 = 71 ie at least 1, 2, 3, 4-fold processing possible or Y = ((2 • 3 • 4 •) • 3) +1 = 73 ie at least 1, 2, 3, 4-fold processing possible or Y = ((3 • 4) • 5) - 1 = 59 ie at least 1-, 2-, 3-, 4-fold processing possible
A permissible number of machining operations = revolutions exists when the result of the printout (Y + 1) / x or (Y - 1) / x is an integer, where x = ε N \ {0} eg Cycles per revolution Cycle path in number of stations Y + 1 = (71 + 1) / 24) = 3.0000000 integer and allowed 2.958333 24.0000 Y + 1 = (71 + 1) / 12) = 6.0000000 integer and allowed 5.916667 12,0000 Y + 1 = (71 + 1) / 6) = 12.0000000 integer and allowed 11.833333 6,0000 Y + 1 = (71 + 1) / 4) = 18.0000000 integer and allowed 17.750000 4.0000 Y + 1 = (71 + 1) / 3) = 24.0000000 integer and allowed 23.666667 3.0000 Y + 1 = (71 + 1) / 2) = 36.0000000 integer and allowed 35.500000 2.0000 Y + 1 = (71 + 1) / 1) = 72.0000000 integer and allowed 71.000000 1.0000 or Y + 1 = (59 + 1) / 12) = 5.0000000 integer and permissible 4.916667 12,0000 Y + 1 = (59 + 1) / 6) = 10.0000000 integer and permissible 9.833333 6,0000 Y + 1 = (59 +1) / 5) = 12.0000000 integer and allowed 11.800000 6,0000 Y + 1 = (59 + 1) / 4) = 15.0000000 integer and allowed 14.750000 4.0000 Y + 1 = (59 + 1) / 3) = 20.0000000 integer and allowed 19.666667 3.0000 Y + 1 = (59 + 1) / 2) = 30.0000000 integer and allowed 29.500000 2.0000 or Y-1 = (61-1) / 6) = 10.0000000 integer and permissible 10.166667 6 Y-1 = (61-1) / 5) = 12.0000000 integer and allowed 12.200000 5 Y-1 = (61-1) / 4) = 15.0000000 integer and allowed 5.250000 4 Y-1 = (61-1) / 3) = 20.0000000 integer and allowed 20.333333 3 Y-1 = (61-1) / 2) = 30.0000000 integer and allowed 30.500000 2 (necessary and sufficient condition)

The workpiece receptacles are preferably more concentric in series along several Pitch circles arranged. The workpiece holders of the respective partial circles are preferred formed such that the workpieces of the inner circles on a different, preferably higher vertical level are arranged than on the neighboring one outer pitch circle. In the described determination of the number of on one Partial circle arranged workpiece holders, it becomes possible to place the workpieces between perform two coating operations through a drying oven, immediately by transporting the machined, especially coated workpieces to the treatment station, i.e. the drying oven in return workpieces in each required processing station are promoted. At the proposed vote the number of processing stations and workpiece holders are on Surprisingly, the workpieces always in the required machining and / or Treatment station.

Further preferred embodiments of the subject matter of the invention are in the rest Sub-claims set out.

Fig. 1

eine Beschichtungsvorrichtung nach einem ersten Ausführungsbeispiel der Erfindung mit einer durch einen Rundtisch gebildeten Werkstücktransporteinrichtung in schematischer Teildarstellung;

Fig. 2

eine schematische Teildarstellung einer Beschichtungsvorrichtung mit einer durch eine Transportkette gebildeten Werkstücktransporteinrichtung;

Fig. 3

eine schematische Teildarstellung einer Beschichtungsvorrichtung mit zwei integrierten, sowohl in vertikaler als auch in horizontaler Richtung einstellbar positionierbaren, vorzugsweise taktweise anheb- und absenkbaren Beschichtungseinheiten;

Fig. 4

eine schematische Darstellung einer Beschichtungsvorrichtung nach einem weiteren Ausführungsbeispiel (Variante Innen- und/oder Außenbeschichtung) mit einer Antriebseinrichtung, zu der das Werkstück vorzugsweise anhebbar oder die auf das Werkstück absenkbar ist;

Fig. 5

eine schematische Darstellung einer Beschichtungsvorrichtung mit profilierter Beschichtungsfläche;

Fig.6a

eine Draufsicht auf eine Rundtischeinrichtung mit mehreren Werkstückaufnahme-Teilkreisen; und

Fig.6b

eine Seitenansicht der Rundtischeinrichtung gem. Fig.6a.

The invention is explained in more detail below on the basis of exemplary embodiments and associated drawings. In these show:

Fig. 1

a coating device according to a first embodiment of the invention with a workpiece transport device formed by a rotary table in a schematic partial representation;

Fig. 2

a schematic partial representation of a coating device with a workpiece transport device formed by a transport chain;

Fig. 3

a schematic partial representation of a coating device with two integrated, adjustable in both the vertical and horizontal directions positionable, preferably incrementally raised and lowered coating units;

Fig. 4

a schematic representation of a coating device according to a further embodiment (variant inner and / or outer coating) with a drive device to which the workpiece can preferably be raised or which can be lowered onto the workpiece;

Fig. 5

a schematic representation of a coating device with profiled coating surface;

6a

a plan view of a rotary table device with a plurality of workpiece receiving pitch circles; and

Figure 6b

a side view of the rotary table device acc. 6a.

The device for coating a workpiece shown in FIG. 1 comprises a first coating roller 1 and a second coating roller 2, together can be brought into contact with a workpiece 3 to be coated is. The two coating rollers 1, 2 support the workpiece 3 in a radial manner Direction down. By means of the first coating roller 1 and the second coating roller 2 coating liquid applied to the workpiece is in the Floor area of a tub 4 is stored. The coating medium stored in the tub 4, here coating liquid, forms a inside of the tub Sump 5 for the coating liquid, e.g. an adhesion promoter liquid for that Manufacture of tubular parts for vibration dampers or engine mounts.

To supply the coating medium stored in the sump 5 to the two Coating rolls 1 and 2, a transfer device 6 is provided, which here both with the first coating roller 1 and with the second coating roller 2 roller element 7 in contact and one in the sump 5 immersing plunger roller element 8. The roller element 7 and that Dip roller element 8 are in contact with each other. The dipping roller element 8 is driven in rotation via the roller element 7.

The dipping roller element 8 has a diameter that is slightly larger than the diameter of the roller element 7.

The transfer device 6 and the two coating rollers 1 and 2 are inside the tub 4 added such that only an upper region of the coating rollers 1 and 2 protrudes in sections over an upper edge of the tub 4.

The coating rollers 1 and 2 accommodated in the tub 4 are common movable with the tub 4 in the vertical direction up or down. The two coating rollers 1 and 2 are thereby movable into the order position shown, in which the two coating rollers with the one to be coated accordingly The workpiece is in touch contact. After finishing a workpiece coating process can the two coating rollers 1 and 2 together be lowered with the tub 4 so that the coated workpiece from the processing position moved out and a workpiece now to be coated in the processing position can be retracted. Said tub 4 has the embodiment shown in Fig. 1 an unloading in the workpiece transport direction Leg 4a, over which any of a coated workpiece 3 dripping coating liquid can get back into the sump 5.

The rollers of the support roller pair arrangement WP, that is, the first coating roller 1 and the second coating roller 2 are arranged in the embodiment shown here in such a way that, seen in the horizontal direction, a gap is formed between the two coating rollers 1 and 2, the gap width of which is smaller than the outside diameter of the A rotationally symmetrical workpiece 3 shown here. A line of contact between the coating roller 1 and the workpiece 3 runs parallel to an axis of rotation of the first coating roller 1. A connecting line between the said line of contact and the axis of rotation of the first coating roller 1 is inclined at an angle α1 with respect to a horizontal reference line. The second coating roller 2, which is arranged at a distance from the first coating roller 1, generally has the same outer diameter as the first coating roller (although this is not mandatory). However, the second coating roller 2 is arranged at a slightly higher level than the first coating roller 1. A connecting line extending from an axis of rotation of the second coating roller 2 to a contact area with the workpiece 3 is inclined by an angle α _{2 with} respect to a horizontally running reference line, which is smaller than the aforementioned inclination angle α ₁ .

The outer diameter of the first coating roller is preferably 1.5 times as much as large as the diameter of the workpiece to be coated. The one shown here In one embodiment, the diameter of the first coating roller is approximately 3 times the diameter of the workpiece to be coated 3.

The workpiece 3 to be coated is essentially completely immersed in an intermediate a coating trough formed the coating rollers 1,2.

The workpieces to be coated by the coating device are at of the embodiment shown here guided by holding domes 9, which are located here only shown in sections rotary table 10 are attached. The one at the round table 10 attached holding domes 9 are optionally coupled to a drive device and can also for the forced rotation of the workpiece to be coated be driven by rotation.

In the embodiment shown here, the holding domes are comparatively thin trained and the workpieces 3 to be coated are only loosely on the holding mandrels 9 attached. However, it is also possible to dimension the holding mandrels in such a way that that the workpieces 3 to be coated comparatively firmly on these holding mandrels can be plugged on. By using the holding mandrels 9 shown here With a comparatively small diameter, the workpiece can move between the Center both coating rollers 1 and 2 automatically. This will make it more even and essentially determined by the weight of the workpieces 3 Contact pressure maintained. There are also a number at the rotary table 10 shown here Support rollers 11 attached, on which to carry out an inner coating rotationally symmetrical workpieces can be placed.

In the system for coating shown in Fig. 2 rotationally symmetrical Workpieces 3 also find the one described above in connection with FIG Coating device application. The individual components of those shown in Fig.2 Coating device bear the same reference numerals as the components the preceding coating device described in connection with Fig.1. In the system shown in FIG. 2, the coating to be coated takes place Workpieces 3 by means of a transport chain 12, which is articulated from a plurality Chain links (not shown) is formed. On individual chain links this Transport chain 12, transport straps 13 are pivotally articulated. Any of these Transport brackets 13 in turn carries a Haltedom 9, on each of which Workpiece 3 is placed. The on the transport tabs 13 and 9 holding mandrels the transport chain 12 suspended workpieces 3 are successively in the between the first coating roller 1 and the second coating roller 2 are formed Coating gap introduced. For the further transport of a workpiece the two coating rollers 1 and 2 or the entire coating unit including the housing lowered briefly so that the coated workpiece emerges from the coating gap and is moved further by means of the transport chain 12 can be. Any application medium dripping from the coated workpiece 3 can also in this embodiment by the cantilever leg 4a of the housing are caught.

The supply of coating material 5 (here primer) to the rotating coating and support rollers 1, 2 forming rollers at the same time Transfer roller 7 evenly distributed or individually for each coating roller 1, 2 be managed. Thus, a double order is just as e.g. in a separate Feeding e.g. with regard to the consistency or type of different coating media for each coating roller a further freedom of choice with regard to the Coating result possible.

Even with heavy workpieces, they rotate reliably and stably Supported with the (support) and coating roller pair 1.2.

It is also possible to coat the workpiece using a coating roller and drive or (especially in conjunction with a third roller (coating and / or Support, dyeing or drive roller)) two workpieces by one or to coat a pair of coating rollers (preferably at the same time support rollers) and drive.

The system shown in Figure 2 forms part of the workpiece processing device shown in Figure 3. In the processing device shown in Fig. 3, the coating workpieces by an endless revolving shown only indicated here Link chain 12 transported. The transported through the link chain 12, on pivotally movable, in the transport direction deflectable transport tabs 13 held Workpieces are in a first coating station A with a first Application medium coated and then arrive after running one Drying oven (not shown) in a second coating station B, which in its Structure essentially that described above in connection with Fig.2 Device corresponds.

The first coating station A and the second coating station B are each with a positioning device for setting a basic position of the respective Coater. The positioning device assigned to the first coating station here comprises two operable by hand crank devices 15 and 16 Spindle elements. The first coating station A is therefore both horizontal Direction as well as in the vertical direction of the respective workpiece dimensions can be positioned accordingly. The second coating station is also manual actuable hand crank devices 17 and 18 can be pre-positioned. The so prepositioned coating stations A and B are by separate drive units 19, 20 can be brought into a processing position in cycles, in particular can be raised, in which an application medium on the correspondingly fed workpiece 3 can be applied and the workpiece is possibly lifted off the holding mandrel. The drive units are used for the further transport of the coated workpieces 3 controlled such that at least the coating rollers 1, 2 or the whole Coating unit including housing can be lowered briefly so that the coated workpiece is removed and a new workpiece is fed can, without this resulting in uncontrollable contact of the workpieces and the coating roller comes.

The structure of the coating stations A and B corresponds to that in FIG Connection with Fig. 2 described coating device. If necessary, you can of course i. V. m. a coating station A or B also coating stations can be used with a different structure.

As shown schematically in Fig. 5, one or more of the coating rollers 1,2 also a contoured peripheral surface (here with two coating sections 1 a, 1b) have, in the event that only a portion 3a, 3b of the workpiece 3 to be coated while the rest of the workpiece is being coated (also from subsequent treatment, e.g. on an adhesive coating) remains free.

In this way, exact coating limits can be achieved without masking work on the workpiece can be achieved on the workpiece.

4 is one for carrying out a workpiece inner and / or outer coating provided embodiment of a device according to the invention shown. In the illustrated embodiment, one is along its inner and / or outer peripheral surface rotationally symmetrical workpiece 3 to be coated onto a Bracket, e.g. a pair of support rollers 11 placed. This pair of support rollers 11 forms here the pair of support rollers supporting the workpiece at two support areas WP. In the manner described above, the pair of support rollers at the same time form coating rollers for an outer coating of the workpiece 3 and can also be coupled to drive means for a rotary connection.

The workpiece 3 to be coated can be rotated by the pair of support rollers 11 stored. To coat the inner surface of the workpiece 3, one may be used beforehand a coating roller 1 provided with a coating medium into the workpiece 3 retracted. The coating roller 1 is connected to a rotary drive device. The workpiece 3 rests on the support rollers 11. By simultaneous rotation the coating roller 1 and the workpiece supported on the support rollers 11 3 forms a uniform layer on the inner peripheral surface of the workpiece 3 from the application medium fed through the coating roller 1.

A particularly uniform supply of the coating roller 1 with the coating medium can by means of feed channels formed in the coating roller 1 can be achieved.

For an inner coating, the pure rotary drive of the workpiece 3 can (Internal) coating roller 1 when the workpiece is rotatably supported by the support roller pair be enough.

The coating roller 1 is preferably on a vertically movable here Carriage S mounted so that the workpiece 3 through the coating roller upwards moved to the frictional contact and rotary drive by the two drive rollers 28, 29 can be.

The workpiece is driven in rotation via a workpiece drive motor 25, a here designed as an angular gear mechanism 26 and a coupled thereto Output gear 27. The output gear 27 is with the two drive rollers 28, 29th drive-connected. The workpiece 3 is lifted over the coating roller 1 and pressed against the drive rollers 12, 29. This becomes a forced drive of the workpiece 3 is reached and a uniform, high-quality coating is ensured. The lifting of the workpiece for the coating process has the Another advantage that the pair of support rollers 11 (without expensive ball bearings) can simply be carried out in the form of fixed support spikes. Besides, that will lower platen pair 11 then not in contact with coating material brought.

If necessary, the upper, raised drive rollers 28, 29 can also be used as Outside coating rollers can be formed.

The coating roller 1 is, based on the workpiece 3, possibly in the radial direction movable. The coating roller 1 can as soon as the desired coating of the Inner surface of the workpiece 3 is reached, gradually from the inner peripheral surface of the Workpiece 3 are lifted off. The coating roller is preferred 1 continues to drive, causing the formation of any streaks on the inner peripheral surface of the workpiece 3 is avoided. The from the inner peripheral surface of the The workpiece 3 lifted coating roller 1 can now in the axial direction of the workpiece 3 are pulled out of the inner region of the workpiece 3. The workpiece can continue, in particular also inside a drying oven be rotated.

In the embodiment shown in Figure 4, the are along their interior and / or Workpiece outer surface to be coated by a conveyor chain device transported. Such an inner coating of the workpiece can be but also with the rotary table previously described in connection with Fig.1 carry out. For this purpose, the corresponding ones to be coated on the inside and / or outside Workpieces to those identified by the reference number 11 in FIG Support rollers (possibly also coating rollers) placed on and similar to the previous one described by means of a rotary drive inserted into the workpieces 3 Coating roller 1 coated. By correspondingly provided according to FIG. 4 Drive rollers also force the respective workpiece to rotate movable. In a corresponding manner, as described above, the workpiece also by lifting in drive connection with upper rotating drive rollers to be brought. If necessary, the inner coating roller 1 by means of a vertically movable mandrel for guiding the workpiece into a drive and Coating layer replaceable (for external coating).

Figure 5 shows a coating device again in a schematic representation a coating roller 1. If necessary, this can also be provided twice and the workpiece 3 through the coating rollers 1, 2 in a similar manner as in Fig. 1 be supported, the coating roller arrangement here being profiled Coating surface with coating sections 1a, 1b, in the event that only a cylinder section (two cylinder sections in the present example) of the workpiece 1 to be coated with edge scraper coating edge, while the other areas of the workpiece remain free of a coating.

In this way it is excellent adaptability without the need for covers the coating to later use requirements or subsequent coating tasks (e.g. vulcanizing rubber layers on a primer) possible.

The device according to the invention is particularly suitable for coating ring or tubular components. With the device according to the invention also comparatively viscous fluids reliably on the corresponding Apply workpieces. This will result in a significantly reduced solvent consumption reached. The drying time of the coating medium is also determined by shortens the device according to the invention. Through reliable synchronization the rotational movement of the workpiece to be coated and the associated one Coating roller achieves a high surface quality. By the clock Moving or lowering or lifting the coating rollers is a collision-free Workpiece transport guaranteed.

The operation of the coating device described above with reference to Figure 1 is subsequently used in connection with a vibration damper coating device described:

For coating an outer coating consisting of a corrosion protection lacquer on e.g. Vibration damper sleeves are on radially from one Round table 10 projecting holding mandrels attached by means of a handling system. A correspondingly arranged on a holding mandrel 9 vibration damper sleeve 3 is lowered by rotating the rotary table 10 over an initially Coating device positioned. As soon as the vibration damper sleeve reaches its machining position has reached, the coating device in the vertical direction raised until the vibration damper sleeve with its outer peripheral area sits on the first coating roller 1 and the second coating roller 2. The constantly rotating two application rollers 1 and 2 also displace them their own weight in the gap formed between the two application rollers 1 and 2 penetrating vibration damper sleeve in rotation and together support that Workpiece in the radial direction. About the dipping roller element 8 and the roller element 7 the corrosion protection paint collecting in the bottom area of the tub 4 becomes continuous dispensed on the two coating rollers 1 and 2 and arrives thereby on the outer peripheral surface of the vibration damper sleeve. As soon as the Vibration damper sleeve 3 sufficiently in the area of its outer peripheral surface the corrosion protection paint is coated, the coating device is again lowered in the vertical direction and another, initially still uncoated Workpiece positioned over the coating device. The one already coated Vibration damper sleeve is simultaneously moved further and gets into one Drip-off position into which, if necessary, drip-off corrosion protection paint into the tub 4 and thus can get back into the application medium sump 5. The coating device is raised again towards the workpiece 3.

The invention is not restricted to the exemplary embodiment described above. For example, it is also possible to dispense with the plunger roller element 8 and immerse the roller element 7 directly into the application medium sump 5. It is also possible to use the workpiece to be coated without the aid a rotary table or a transport chain, for example by means of a transfer device in the nip area formed between the two coating rollers 1 and 2 appeal. Both when using the rotary table and when using the transport chain, it is advantageously possible to use the coating device to move along a certain distance in the workpiece transport direction. This makes it possible to keep the rotary table or the transport chain constant To operate transport speed.

Finally, especially when using axially parallel to the axis of rotation of the rotary table arranged workpiece holding units, for an interior and / or External coating (also spray coating) these coating stations on different pitch circles, preferably (seen in the radial direction) be arranged "on gap", so that the clock variability of the overall device (also in connection with a dryer and / or cycle-coordinated application of loading and unloading stations) and e.g. an odd number of Workpiece holding stations, arranged on a pitch circle, in connection with a even number of workpiece receiving stations, arranged on one further e.g. Pitch circle further outward can be provided.

Such a rotary table device is shown in FIG. 6a, in which a series of the first Workpiece receptacles 30 arranged on a radially outer first pitch circle 31 are. Within this first pitch circle there is a second pitch circle 32, on which a series of second workpiece holders 33 is arranged.

In the embodiment of the rotary table transport device shown, the first are Workpiece receptacles 30, based on the second workpiece receptacles 33 for a gap arranged. Both the first workpiece fixtures and the second workpiece fixtures are provided in an odd number. In the embodiment shown here the first and second workpiece holders 30, 33 are not about the axis of rotation Z of the rotary table device movable, but stationary with the rotary table device coupled. However, it is also possible to use the two pitch circle arrangements to be relatively movable to each other.

As can be seen from FIG. 6b, the first and second workpiece holders 30, 33 formed such that the workpieces moved along the first pitch circle 31 towards the workpieces moving along the second pitch circle 32 are at a different axial height level. In the embodiment shown hold the radially inner second workpiece receptacles 33 Workpieces, seen in the vertical direction, higher than those lying further out first workpiece receptacles 30. This makes access to reached the workpieces held radially on the inside.

Both the first workpiece holders 30 and the second workpiece holders 33 are provided with a drive device through which the in the workpiece holders each workpiece held rotatable about a vertical axis are. In the embodiment shown, those in the first workpiece holders 30 held workpieces rotated at the same speed as that by the second workpiece holders 33 held workpieces. However, it is also possible to rotate the workpieces at different speeds. The workpiece turning organs of the first and second workpiece holders 30, 33 can, for example by means of a toothed belt. An external one is preferred first workpiece holder 30 with an adjacent inner second Workpiece holder 33 coupled. The rotary drive of the workpiece holding elements then takes place in the respective processing or treatment station by coupling a stationary drive device to the workpiece holders 30, 33.

The switching of the rotary table device according to a predetermined Switching pattern is carried out by means of a rotary table drive device 34, which is in the present In the case of one controlled by a control device (not shown) Electric motor 35 which, via a gear 36 with a coaxial on the Rotary table transport device 10 attached drive gear 37 with the rotary table device 10 is coupled.

The rotary table device 10 is rotatably supported in the exemplary embodiment shown through a roller bearing 38 that rotates a stationary base frame 39 couples with the rotary table device 10. In the embodiment shown both the rotary table device 10 and the pins 40, 41 attached to it of the workpiece holders made of a light metal alloy, which makes a considerable Reduction of the moment of inertia of the rotary table device is achieved.

The height at which they are arranged along the inner second pitch circle 32 Workpieces held opposite the top of the rotary table device 10 are, preferably corresponds approximately to the radius of the inner, second partial circle 32. For coupling the workpieces to the workpiece holders 30, 33 can preferably rod-like, preferably arranged coaxially to the workpiece axis of rotation Holding members 42 are used. This advantageously makes it possible an undesirable precipitation of the application medium on the first and second To avoid workpiece holders 30, 33.

The present invention enables a permissible number of workpiece pickups on a rotating transport device, preferably a rotary table, in Depends on the number of treatments required / possible per workpiece (Drying) and / or processing (coatings) determined by the permissible Number of workpiece holders from a common multiple of the number possible treatments and / or treatments determined and then provided is that from this and the number of planned / possible edits certain quotient is an integer.

Claims (28)

Device for processing, in particular coating, workpieces that are in sequentially arranged workpiece receptacles of a rotating transport device are included, the workpieces between two machining, in particular Coating processes, through a treatment station, in particular a Drying oven, are moved and a number Y of workpiece holders in Reference to an integer factor x, with x> 0, is chosen such that a quotient (Y ± 1) / x is an integer. A method according to claim 1, characterized in that the factor x corresponds to a number (m, n, o, p ....) of possible treatment and / or processing operations on a workpiece up to its work position. Method according to claim 1 or 2, characterized in that a number Y of workpiece holders from a product increased by +1 or reduced by -1 of a common multiple of the number (m, n, o, p ....) of possible treatment and / or machining operations with an integer factor x (x = 1, 2, 3, ...) are determined and then it is checked whether the quotient from (Y ± 1) / x is an integer. Method according to at least one of the preceding claims 1 to 3, characterized in that a number (m, n, o, p ....) of possible treatment and / or processing operations on a number of revolutions, in particular revolutions of the workpiece holder with the workpiece a rotary table transport device until the workpiece is finished. Method according to at least one of the preceding claims 1 to 4, characterized in that the workpiece holders form workpiece holder stations in an even number or an odd number. Method according to at least one of the preceding claims 1 to 5, characterized in that the workpieces are passed through a drying oven between two coating processes, workpieces being conveyed directly into the treatment station, i.e. the drying oven, in return by transporting them to the treatment station, that is to say the drying oven required processing station are funded. Method according to at least one of the preceding claims 1 to 6, characterized in that a plurality of processing stations, in particular coating stations, are arranged along a circumference of a rotary table transport device and the workpieces are passed through a drying oven between two coating processes, the number of revolutions that the rotary table -Transport device for the completion of a workpiece is carried out, which corresponds to the number of possible treatment and / or processing operations. Device for processing, in particular coating workpieces, which sequentially arranged workpiece receptacles of a rotating transport device are included, the workpieces between two machining, in particular Coating processes, through a treatment station, in particular a Drying oven are movable and a number Y of workpiece holders in relation to an integer factor x, with x> 0, a number Z is chosen such that a quotient (Y ± 1) / x is an integer. Apparatus according to claim 8, characterized in that the factor x corresponds to a number Z of possible processing stations. Apparatus according to claim 8 or 9, characterized in that the transport device is a rotary table transport device which has workpiece receptacles in succession along a pitch circle, the workpiece receptacles forming workpiece receiving stations in an even or odd number. Device according to at least one of the preceding claims 8 to 10, characterized in that a number Y of workpiece holders is determined according to the equation Y = (m • n • o • p ..... • x) ± 1, where (m, n, o, p ....) represent a number of possible treatment and / or processing operations and at the same time a number of revolutions with the transport device, which a workpiece runs through to completion, and the expression (m • n • o • p. ....) represents a common multiple of this number of possible treatment and / or machining processes while x is an integer factor greater than 0, for determining a number of workpiece fixtures Y that is coordinated with the number of treatment and / or machining processes and is particularly permissible is. Device according to at least one of the preceding claims 8 to 11, characterized in that the number (m, n, o, p ....) of possible treatment and / or processing operations is equal to the number of revolutions of the transport device. Device according to at least one of the preceding claims 8 to 12, characterized in that the transport device is a rotary table transport device along a circumference thereof, a plurality of processing stations, in particular coating stations, and the workpieces between a processing station, in particular coating processes, between two processing processes. in particular, a drying oven can be carried out. Device according to at least one of the preceding claims 8 to 13, characterized in that as a treatment station a drying oven and on the transport device, in particular a rotary table transport device, which contain a plurality of workpiece receptacles, which are individually individually in a preferably odd number, or in connection with adjacent workpiece receptacles Formation of workpiece receiving stations are arranged in an even or odd number, and a plurality of processing stations is provided. Device according to at least one of the preceding claims 8 to 14, characterized in that workpiece receptacles are arranged along a first or first and second pitch circle on a rotary table transport device and the workpieces can be passed through a treatment station, in particular a drying oven, between two coating processes, one of which Number of required machining operations is equal to a number of revolutions of the rotary table transport device. Device according to at least one of the preceding claims 8 to 15, characterized in that the processing stations are spray coating stations. Device for processing, in particular coating workpieces with a rotary table transport device for conveying workpieces placed on the rotary table transport device through at least one treatment station, along a first partial circle, the rotary table transport device along the first partial circle having a series of first workpiece receptacles arranged in succession Pick-up of the respectively given workpieces, in particular according to at least one of the preceding claims 8 to 16, characterized in that the rotary table transport device has a series of second workpiece receptacles along a second partial circle radially spaced from the first partial circle. Apparatus according to claim 17, characterized in that the workpiece holders are provided in an odd number at least on one of the first or second partial circles. Device according to at least one of the preceding claims 8 to 17, for Coating a workpiece (3) with at least one coating roller (1) has a coating surface which is in contact with the workpiece (3) can be brought to deliver a coating medium to the workpiece (3), and one Coating medium supply device (6) for supplying the coating medium to the coating roller, and a support roller pair arrangement (WP) with at least one pair of rollers (1, 2; 11) for supporting the workpiece (3). Device according to at least one of the preceding claims 8 to 19, characterized in that a coating medium supply device (6) is provided for supplying a coating medium to at least one coating roller (1, 2), and in that the coating medium supply device (6) both the supply of the coating medium to a first coating support roller (1) and also the supply of the coating medium to a second coating roller (2), and that a transfer roller (7) is provided, which is compatible with both the first coating roller (1) and the second coating roller (2 ) is in touch. Device according to at least one of the preceding claims 8 to 20, characterized in that the coating medium supply device (6) has a receiving area for storing the coating medium, the receiving area forming a sump (5) for the coating medium, in particular a coating liquid, and a roller element dips into the sump (5), in particular the feed device (6) has a rotating roller (8) which can be brought into contact with a transfer roller (7) for transferring the coating medium from the sump (5) to the transfer roller (7) and that at least the coating medium supply device is accommodated in a housing trough (4) and the sump (5) is formed in the lower region of the housing trough (4). Device according to at least one of the preceding claims 8 to 21, characterized in that the coating surface of the at least one coating roller (1, 2) is formed by a soft material body. Device according to at least one of the preceding claims 8 to 22, characterized in that the coating roller (1) is formed separately from the support roller pair arrangement (WP) and has an outer diameter which is smaller than the inner diameter of an inner region of a workpiece, and in that the coating roller ( 1) can be inserted into the inner region of the workpiece (3) for applying the medium to an inner surface of the workpiece (3). Device according to at least one of the preceding claims 8 to 23, characterized in that the coating roller (1, 2) has a profiled coating surface (1a, 1b) for a section-wise coating (3a, 3b) of the workpiece (3). Device according to at least one of the preceding claims 8 to 24, characterized in that both a drive device for driving the workpiece and a drive device for driving at least one of the coating rollers (1, 2) are provided, and that the holding device is integrated in a transport device, the transport device being formed by a rotary table (10) or by a transport chain (12). Device according to at least one of the preceding claims 8 to 25, characterized in that the transport device is designed as a rotary table transport device, and in that workpiece receptacles provided for receiving a workpiece or several workpieces are arranged in an odd number along a pitch circle. Device according to at least one of the preceding claims 8 to 26, characterized in that a plurality of processing stations are arranged along the circumference of the rotary table transport device, and in that the number Y of workpiece holders per pitch circle and the number Z of processing stations is selected such that the quotient is selected from (Y +1) / Z or the quotient from (Y - 1) / Z is an integer. Apparatus according to claim 8, characterized in that the number Y of workpiece holders is determined according to the equation Y = (m • n • o • p ...) ± 1, the factors (m, n, o, p ... ) correspond to the number of possible treatment and / or processing operations.

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