CA2180962A1 - Device and roller for coating rotationally symmetrical moulded bodies - Google Patents
Device and roller for coating rotationally symmetrical moulded bodiesInfo
- Publication number
- CA2180962A1 CA2180962A1 CA002180962A CA2180962A CA2180962A1 CA 2180962 A1 CA2180962 A1 CA 2180962A1 CA 002180962 A CA002180962 A CA 002180962A CA 2180962 A CA2180962 A CA 2180962A CA 2180962 A1 CA2180962 A1 CA 2180962A1
- Authority
- CA
- Canada
- Prior art keywords
- roller
- moulding
- rollers
- coating material
- mouldings
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/003—General methods for coating; Devices therefor for hollow ware, e.g. containers
- C03C17/005—Coating the outside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/02—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles
- B05C1/022—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles to the outer surface of hollow articles
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coating Apparatus (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Physical Vapour Deposition (AREA)
Abstract
An apparatus and a roller for the coating of the outer surface of rotationally symmetrical mouldings, especially bottles, are provided. The apparatus is equipped with a device for transporting and rotatably holding the mouldings (3) to be coated, with a sprinkler head (6) for the coating material and with at least one rotatable roller (4) which can be pressed onto the moulding (3) and can be lifted off again and the axis of rotation of which, in the pressed-on state, is arranged at least essentially parallel to the axis of rotation of the moulding (3), for distributing the coating material on the outer surface of the moulding (3). The roller (4) possesses an outer contour shaped complementarily to the outer contour of the moulding (3). This ensures that the coating material is distributed uniformly on the outer surface of the moulding (3) before the said coating material is cured.
Description
2~ 80~62 9th November 1995 Apparatus and roller for the coating of rotationally symmetrical mouldings DESCRIPTION
The invention relates to an apparatus and a roller for the coating of the outer surface of rotationally symmetrical mouldings, especially bottles, and to a correspon~; ng method.
Variou6 apparatuses for the coating of bottles with flowable material, for example plastic, are already known. In this respect, reference is made representa-tively to DE-A-28 30 316 and the publications mentioned in this. By means of the injection-moulding or casting head known from DE-A-28 30 316, it is to be possible to guarantee accurate uniform coating of the bottles.
To apply fluids to bottles, special machines, with their own drive and with a star feeder moving the bottles on a path in the form of an arc of a circle, are already known. An apparatus of this type is described by way of example in EP-A-0 452 943. In this known appar-atus, the bottles in the star feeder are set in natural rotation by rolling on a fixed friction segment and at the same time are subjected to the fluid. This fluid is applied especially for the purpose of covering the chafings, occurring after several recyclings in the case of returnable bottles, as well as other splinterings and scratches on the cylindrical bottle body and of giving the bottles the appearance of being as new.
Apparatuse~ are also already known, for example from US-A-4 586 458, in which fluid from an injection nozzle moving relative to an applicator element is transferred by means of intermediate rollers.
In the drinks industry, there is now a need for the hollow bodies necessary for packaging, especially glass bottles in the non-returnable and returnable sector, to be made increasingly lighter, in order to save costs of material and of transport. However, the walls of bottles of this kind cannot be made as thin as desired, since this entails considerable risks. Thus, for example, bottles filled with drinks containing CO2 are exposed to sustained internal pressure by the filling media. If the surface of a thin-walled bottle is damaged, then pressurized bottles of this type may easily burst. This may lead to unforeseeable product liability claims.
In addition, the outer surface of returnable bottles is normally damaged and scratched during cleAn;ng and filling. Since glass as a material has the property that its stability is influenced primarily by the state of the surface, a pressurized gla~s bottle may burst, etc. even when the damage to the surface is only slight.
It is already known to provide bottles with an outer coating which protects the surface of the bottle against damage during the filling operation, etc. and which "can hold together" the shape of even a splintered bottle. A product sold by Huls AG under the brand name "Vesticoat" and described in DE-A-29 38 309 or EP-A-0 025 932 and DE-A-29 38 229 or EP 0 025 994 can be used as a coating material of this type. By employing materials of this kind, it is possible to use more thin-walled and therefore lighter bottles which are even more reliable than the uncoated glass bottles known hitherto.
These known flowable coating materials are solvent-free for reasons of environmental protection. The disadvantage of this is that these coating materials have relatively high viscosity and cannot be applied simply by injection, dipping or casting. These high-viscosity coating materials are therefore, at the present time, applied in extruded form through a casting or injection head onto the bottle to be coated itself and are then distributed or levelled off by blowing, or also by downstream rolls, on the outer surface of the bottle to be coated. In this respect, it is also known to apply the plastic extrusions to a roll and to transfer these by means of this onto the outer surface of the bottle to be coated. In this known technique, therefore, the bottle 21809~2 -held rotatably at its head and at its bottom is rotated;
the said roll or roller is brought to bear on this rotated bottle and is kept in contact with the bottle for some time, 80 that the coating material is distributed on the bottle surface. These rollers used hitherto had a purely cylindrical shape. On account of this, the coating material was not distributed uniformly over the surface of the bottle. Losses and defective coatings consequently occurred. Moreover, the coated bottles often did not satisfy the quality criteria placed on them.
The object of the invention is, therefore, to provide an apparatus, a roller and a method, by means of which high-viscosity solvent-free coating materials can be applied to mouldings reliably, uniformly and reproducibly.
This object is achieved by means of the teaching of the claims.
The apparatus according to the invention, like the apparatuses known hitherto, possesses a device for transporting and rotatably holding the mouldings to be coated. This device is referred to below as a transport device. Furthermore, the apparatus according to the invention is equipped with a sprinkler head for the coating material and with at least one rotatable roller which can be pressed onto the moulding to be coated and which can be lifted off again. The axis of rotation of the roller, in the pressed-on state, is arranged at least essentially parallel to the axis of rotation of the moulding to be coated and serves for distributing the coating material on the outer surface of the moulding.
This roller, after distributing the coating material, is moved away from the moulding. The coating material distributed on the moulding is then cured in a way known per se, 80 that a protective outer layer or coating forms.
The high-viscosity solvent-free coating systems or lacquer systems employed in this case are especially those with a viscosity of 40,000 mps at approximately 10C up to 1,000 mps at approximately 100C, especially 30,000 mps at 20C to 5,000 mps at 70C.
The expression "rotationally symmetrical" used here is not to be understood in the strictly mathematical sense. According to the invention, mouldings which deviate slightly from rotational symmetry can also be coated.
The inventive essence of the present invention i8 that the roller for distributing the coating material possesses an outer contour shaped complementarily to the outer contour of the moulding. In other words, the profile of the roller represents the negative profile of the moulding to be coated. It may also be said that, in the region in which the moulding and roller come into contact, the lateral profile line of the moulding pro-jected onto a plane coincides approximately with thelateral profile line of the roller likewise projected onto a plane. This criterion can be satisfied even when the moulding and roller have different dimensions, in which case the roller and moulding can rotate at differ-ent speeds. According to a preferred embodiment, however,the roller and moulding have comparable or similar dimensions. Nore specifically, this means that the sum of the radius of the roller and the radius of the moulding results, at any point along the longit~ n~l axis or axis or rotation, in approximately the same value which corresponds approximately to the distance between the two axes of rotation in that state in which the moulding and roller are pressed on one another. It could also be said that the roller has the rotationally symmetrical negative shape of the moulding to be coated or that the roller represents, in relation to the axis of rotation, the rotationally symmetrical complementary shape of the moulding to be coated.
The subject of the invention is therefore also a roller of this type for the coating of the outer surface of rotationally symmetrical mouldings.
By virtue of the shape of the roller according to the invention, it is possible for high-viscosity coating materials to be distributed uniformly, at high production speeds, onto glass hollow bodies to be coated, 80 that, after curing, a homogeneous, uniformly distributed coating is obtained. In this case, the high-viscosity coating materials employed are expediently processed at an operating temperature of 30-100C, especially at 40-60C, or are heated to this temperature.
According to an P~hodiment which is also pre-ferred, in the apparatus according to the invention, the sprinkler head is arranged in such a way that the coating material iB first applied to the roller and is then transferred, either staggered in time or simultaneously, onto the moulding by means of this roller. In this case, the sprinkler head or applicator device used can be any known device used for this purpose, for example casting strip, nozzle, etc. Expediently, however, the coating material is applied to the roller as long as the roller is not yet in contact with the moulding to be coated.
Moreover, the apparatus according to the inven-tion expediently has a metering device known per se. By means of this metering device, an individually adjustable specific quantity of coating material can be applied from a correspo~;ng casting strip onto different regions of the roller in each case via individual combined nozzles, 80 that as uniform a distribution as possible can take place. This metering device can also be designed and controlled in such a way that different quantities of coating material are applied to different regions of the roller simultaneously.
In the apparatus according to the invention, at least either the moulding or the roller is positively rotated. If the moulding is positively rotated, then the roller is positively rotated in the opposite direction when the moulding comes to bear on it. The same applies conversely if the roller is positively rotated. The moulding and roller are preferably positively rotated in opposition, especially at the same rotational speed. If the coating material is applied first to the roller, then the roller and the moulding to be coated are kept in contact until the coating material used is transferred in sufficient quantity or completely.
According to an embodiment which is also pre-ferred, the roller according to the invention possesses an inelastic core and an elastic transfer material applied to the outside of the latter. In this case, the core can be a cylinder; in this case, the transfer material is "responsible" for the outer contour or for the external shape of the roller. The thickness of the transfer material therefore also changes according to the variation, along the longitll~;n~l axis, in the shape of the moulding to be coated.
According to an embodiment which is also pre-ferred, the elastic transfer material has approximately the same layer thickness over the entire length. In this case, the shape of the core is approximately the comple-mentary shape of the moulding to be coated.
In the two embodiments last described, the core can possess, on its outer generated surface, a plurality of radially continuous grooves, into which radially inward-projecting beads of the transfer material engage, so that an axial displacement of transfer material relative to the core is prevented.
It is also possible, of course, for the core to possess beads which are radially continuous on the outside and which engage into continuous grooves cut out in the transfer material. The core expediently possesses a central continuous bore, concentric to the axis of rotation, for receiving a bearing shaft, etc.
The transfer material can be open-pored and consist of sponge rubber, foamed plastics or fibrous natural products, for example lambskin. Furthermore, the transfer material can be closed-pored and be composed of sponge rubber, types of caoutchouc and foamed plastics, especially EPDM and polyurethane plastics. The composi-tion of the transfer material and, of course, also of thecore is expediently to be selected in such a way that it is compatible with the coating materials, does not swell and is also not chemically attacked. Thus, for example, there should be compatibility towards coating materials - 2~096~
based on formulations of polyurethane, acrylate, epoxy and synthetic resin. Moreover, the transfer material should withstand mechanical stresses for as long as possible.
The rotationally symmetrical core of the roller can consist of wood, plastics and metals, especially aluminium or steel of any quality.
On account of the fact that the roller is con-structed from a core and a transfer material, the trans-fer material can be eliminated and renewed according to fixed criteria of use or of wear, 80 that the require-ments in terms of the uniformity of distribution of the coating material are fulfilled.
The transfer material expediently has a thickness 15 of l to 100 mm, especially 30 mm. Especially when the transfer material has a uniform layer thickness over the entire length, as uniform a pressing force as possible and therefore also as good a distribution of the coating material as possible are afforded.
All transport devices known hitherto can be used as a transport device of the apparatus according to the invention. Preferably, however, the transport device serves for the simultaneous transport of a plurality of approximately uniformly spaced mouldings. A transport device of this type can, for example, be a star feeder or a similar device. Preferably, however, the transport device is a conventional conveyor chain, in which the mouldings to be coated are held rotatably 80 as to lie horizontally and at the same time be spaced from one another.
The apparatus according to the invention prefer-ably has a plurality of rollers for the simultaneous coating of a number of mouldings corresponding to the n-~mher of rollers. In this case, the mutual spacing of the rollers corresponds approximately to the mutual spacing of the mouldings in the transport device. In this case, the rollers are preferably held in a lifting carriage which, starting from an initial position, is moved in the direction of the transport device in such a -way that the rollers are pressed approximately simulta-neously onto the mouldings to be coated. In this pressed-on state, the lifting carriage is then moved at the same speed as the transport device and parallel to this transport device, 80 that the rollers are kept pressed against the mouldings. After a predetermined distance or after a predetermined time, the lifting carriage together with the rollers is lifted off from the mouldings and returns to its initial position again.
This lifting carriage is equipped with at least one sprinkler head having, for example, a casting strip.
If there is only one sprinkler head, this must be moved up and down in such a way that, during a cycle, each roller is provided with a ~ufficient coating quantity. In this case, the coating quantity is preferably transferred onto the roller in the time interval in which the roller is not in bearing contact on the mouldings.
Preferably, however, the lifting carriage is equipped with a nl~her of sprinkler heads correspon~; ng to the number of rollers. In this case, these sprinkler heads are arranged stationarily relative to the lifting carriage. In other words, each roller is assigned its own sprinkler head.
According to an embodiment which i6 also pre-ferred, the rollers are held rotatably on a revolvingendless chain. This endless chain iæ guided in such a way that a plurality of rollers are simultaneously held in bearing contact on the mouldings assigned to them and are moved at the speed of the transport device parallel to the latter. This endless chain is guided approximately in the same way as the chain of a crawler tractor.
It was ætated above that the mouldingæ or bottleæ
to be coated are held rotatably both at the head and at the bottom in the transport device. This two-sided holding is necessitated primarily by the fact that, when the roller is pressed on, it is necessary, on account of the high-viscosity coating material, to exert an appreciable pressure which must, of course, be absorbed by the means of holding the bottle.
2 1 80q6~
It may also be necessary, in the effort to save further weight, to coat the bottom of a bottle. In this case, it is possible to mount the bottle in the transport device at the head only, for example by means of an exp~n~;ng mandrel engaging into the bottle mouth. How-ever, if a roller described here were to be pressed onto a bottle mounted in this way, there would be a great risk that the bottle neck would break off.
In order to counteract this risk, according to a preferred embodiment, the apparatus according to the invention is equipped with at least one supporting roller which is arranged opposite the roller for distributing the coating material and which, at least in that region in which the roller is pressed against the bottle to be coated, is likewise pressed from the opposite side onto the bottle to be coated, 80 that only slight loads occur on the mouthpiece at the point where the bottle is held.
This supporting roller must, of course, be guided and moved, parallel to the bottle to be coated, at the same speed as the transport device and as the roller which serves for distributing the coating material.
When the roller for distributing the coating material is brought to bear from above against the bottle to be coated, the said supporting roller is, of course, pressed from below virtually as an abutment against the bottle to be coated. The supporting roller too must, of course, be mounted rotatably.
A conventional cylindrical roller can be employed as a supporting roller. Expediently, however, this supporting roller has the same shape as the roller for distributing the coating material.
According to an embodiment which iR also pre-ferred, a plurality of, especially two supporting rollers located next to one another are provided, the lateral spacing of the two supporting rollers being selected in such a way that they form a kind of bed or bearing for the bottle to be coated. The lateral spacing of the mutually confronting outer generated surfaces of the supporting rollers is therefore smaller than the diameter of the bottle to be coated. In other words, if, as seen in the direction of the axes of rotation, the axis of rotation of the roller for distributing the coating material is connected to the axis of rotation of the bottle and this i8 in turn connected to the two axes of rotation of the supporting rollers, then a Y iæ obtained, this Y preferably "st~n~;ng on its head". In this caæe too, the supporting rollers can be shaped in respect of their outer contour in the same way as the roller for distributing the coating material.
The invention is explained in more detail below by means of figures representing the preferred embodi-ments. Of the figures:
Figures 1 to 3 each show a side view of a bottle to be coated and a section through the associ-ated roller of complementary shape according to the invention;
Figure 4 shows a sketched functional representa-tion of the apparatus according to the invention with a lifting carriage having a plurality of rollers and sprinkler heads;
Figure 5 shows a representation correspo~; ng to that of Figure 4, but with only one sprinkler head;
Figure 6 shows a representation corresponding to that of Figure 4, but in which the rollers are held on a revolving endless chain;
30 Figure 7 shows a representation corresponding to that of Figure 6, but in which there are only two sprinkler heads; and Figure 8 shows a perspective view of a moulding to be coated, with an associated roller and an assigned sprinkler head.
In Figure 4, a transport device 2, here a trans-port chain, of the apparatus according to the invention is shown in greatly simplified sketched form. A transport chain 2 of this type is known. The mouldings, here 2 1 ~09~2 bottles 3, to be coated are held horizontally and are arranged parallel to one another at an approximately equal spacing. At the same time, the bottles are held at the head and at the bottom, for the bottles have a suffi-cient wall thicknes6 in these regions, 80 that these regions do not have to be coated. The bottles 3 can be rotated about their longitl~; n;-l axis.
The lifting carriage 5 shown in Figure 4 is equipped with four rollers 4 which are described in more detail further below. These rollers 4 are at a mutual spacing which corresponds to the mutual spacing of the bottles 3. Each of the rollers 4 is equipped with a separate sprinkler head 6, through which the coating material is applied in metered quantity onto the associ-ated roller 4.
The lifting carriage 5 can execute both a translational to-and-fro movement and a lifting movement according to the arrows shown in Figure 5. To carry out the coating operation, the lifting carriage is brought from an initial position (not shown), in which the rollers 4 and bottles 3 are not in contact with one another, into the position shown in Figure 4. From there, the lifting carriage 5 is moved parallel to the transport chain 2 and at the same speed in the direction of the arrow pointing to the right. At the same time, the coating material applied to the rollers 4 is transferred onto the bottles 3 and distributed on their outer sur-face. In this case, the bottles 3 and the rollers 4 are both positively rotated in opposition.
After a predetermined time or after a predeter-mined distance, the lifting carriage is raised and returns to its initial position (not shown). During this cycle of movement, the coating material is applied in metered quantity onto the rollers 4 which continue to be rotated.
The mouldings and rollers employed in this case can have the shapes shown in Figures 1 to 3. As emerges from these Figures, the outer contour 8 of the roller 4 according to the invention has a shape complementary to 21 80q~
the outer contour 9 of the bottle 3. In this case, the sum of the radius a (see Figure 1) of the bottle 3 and the radius b of the roller 4 is equal to the distance between the longitn~;n~l axis of the bottle 10 and the longitl-~;n~l axis 11 of the roller 4 in the pressed-on state. In other words, the sum of a and b corresponds to the sum of x and y of Figure 1, but it is assumed, in this case, that the transfer material 12 of the roller 4 is not compressed in the pressed-on state. However, this is so in actual fact. The above calculations therefore relate to the state in which the roller 4 is pressed onto the bottle 3 without any compression of the transfer material 12. During the actual coating operation, however, the transfer material 12 is compressed slightly.
The roller 4 according to the invention and the bottle 3 are held rotatably and mounted on their two end faces. The devices necessary for this purpose are known and are therefore not shown.
The roller 4 possesses a hollow-cylindrical core 13 which is surrounded on the outside by the transfer material 12. The core 13 possesses, on its outer gener-ated surface, a plurality of radially continuous grooves 14, into which radially inward-projecting beads 15 of the transfer material 12 engage.
In the embodiment shown in Figure 2, the core 13 is virtually the cause of the negative shape of the roller 4. This core 13 carries, on its outer generated surface, the transfer material 12 which has approximately the same layer thickness along the longitudinal axis 11.
This uniform layer thickness guarantees that the pressing force and consequently also the distribution of the coating material are approximately the same over the entire outer surface of the bottle 3.
The representation shown in Figure 5 corresponds essentially to the representation of Figure 4. The difference is that, in the embodiment shown in Figure 5, there is only one sprinkler head 6 which is moved to and fro, so that the coating material is applied to all four rollers 4. The sprinkler head 6 is thus movable to and _ - 13 -fro relative to the lifting carriage (not shown).
The representation shown in Figure 6 also corre-sponds approximately to the representation shown in Figure 4. However, the rollers 4 are held on an endless chain 16 revolving in the manner of a crawler tractor. In this case, starting from an initial position A, the rollers 4 are guided relative to the transport chain 2 and are brought to bear on a bottle 3. From this position B, the roller 4 is guided parallel to the tranæport chain 2, with the roller 4 and bottle 3 rotating in opposition, as far as a point C. There, the roller 4 is lifted off from the bottle 3 and guided to the point D. There, the coating material is applied to the roller 4 by means of the sprinkler head 6.
In this case, the lifting carriage 5 possesses four sprinkler head~ 6 and can be moved to and fro according to the upper arrow x.
In this embodiment too, the sprinkler heads 6, together with the associated carriage, are moved to and fro horizontally. In this case, however, there is no need for raising and lowering again.
The embodiment shown in Figure 7 corresponds approximately to the embodiment shown in Figure 6. The difference is that the carriage 5 possesses only two sprinkler heads which are moved to and fro according to the arrow x.
Moreover, in all the embodiments, the rotational speed of the bottle and roller can be especially 1 revolution per minute to 300 revolutions per minute. This rotational speed is expediently adjustable.
Figure 8 shows a typical sprinkler head 6 with a casting strip 18. From this casting strip 18, the necess-ary coating material is transferred in metered quantity onto the roller 4. The design of the sprinkler head is, in this case, of a conventional kind.
The roller 4 possesses the core 13 already described above, with the elastic transfer material 12 and with a central continuous bore 17 concentric to the axis of rotation. This roller 4 is pressed against the 2 1 8~q62 bottle 3 and at the same time transfers the coating material onto the bottle 3 and distributes it over the outer surface of the latter.
Due to the fact that each bottle to be coated or each moulding to be coated is asæigned its "own" roller, it is also possible to allow for the frequently occurring fact that a location for a moulding 3 in the transport device 2 is often not occupied by the moulding 3 to be coated.
The apparatus according to the invention can therefore be equipped with a detecting device (not shown) which ascertains whether, at a location for a moulding in the transport de~ice 2, a moulding of this type is actually present or not. If no moulding to be coated i8 present, then this information is c~mmnn;cated to a control and regulating device for metering the quantity of coating material. This control device then ensures that no coating material is transferred onto the roller 4 if the moulding to be coated or the bottle 3 to be coated is not present in the transport device 2. This ensures that, for each bottle, the intended quantity of coating material is applied to the respective roller and is then transferred from this onto the bottle 3 to be coated. In other words, there is no possibility that the coating material applied to the respective roller in one work cycle will not be transferred onto the bottle 3, but remains on the roller 4, onto which the same coating quantity is then applied once again in the next work cycle, 80 that double the coating quantity is subsequently transferred onto the next bottle to be coated. A reproducible and uniform coating meeting the requirements is thereby achieved.
The invention relates to an apparatus and a roller for the coating of the outer surface of rotationally symmetrical mouldings, especially bottles, and to a correspon~; ng method.
Variou6 apparatuses for the coating of bottles with flowable material, for example plastic, are already known. In this respect, reference is made representa-tively to DE-A-28 30 316 and the publications mentioned in this. By means of the injection-moulding or casting head known from DE-A-28 30 316, it is to be possible to guarantee accurate uniform coating of the bottles.
To apply fluids to bottles, special machines, with their own drive and with a star feeder moving the bottles on a path in the form of an arc of a circle, are already known. An apparatus of this type is described by way of example in EP-A-0 452 943. In this known appar-atus, the bottles in the star feeder are set in natural rotation by rolling on a fixed friction segment and at the same time are subjected to the fluid. This fluid is applied especially for the purpose of covering the chafings, occurring after several recyclings in the case of returnable bottles, as well as other splinterings and scratches on the cylindrical bottle body and of giving the bottles the appearance of being as new.
Apparatuse~ are also already known, for example from US-A-4 586 458, in which fluid from an injection nozzle moving relative to an applicator element is transferred by means of intermediate rollers.
In the drinks industry, there is now a need for the hollow bodies necessary for packaging, especially glass bottles in the non-returnable and returnable sector, to be made increasingly lighter, in order to save costs of material and of transport. However, the walls of bottles of this kind cannot be made as thin as desired, since this entails considerable risks. Thus, for example, bottles filled with drinks containing CO2 are exposed to sustained internal pressure by the filling media. If the surface of a thin-walled bottle is damaged, then pressurized bottles of this type may easily burst. This may lead to unforeseeable product liability claims.
In addition, the outer surface of returnable bottles is normally damaged and scratched during cleAn;ng and filling. Since glass as a material has the property that its stability is influenced primarily by the state of the surface, a pressurized gla~s bottle may burst, etc. even when the damage to the surface is only slight.
It is already known to provide bottles with an outer coating which protects the surface of the bottle against damage during the filling operation, etc. and which "can hold together" the shape of even a splintered bottle. A product sold by Huls AG under the brand name "Vesticoat" and described in DE-A-29 38 309 or EP-A-0 025 932 and DE-A-29 38 229 or EP 0 025 994 can be used as a coating material of this type. By employing materials of this kind, it is possible to use more thin-walled and therefore lighter bottles which are even more reliable than the uncoated glass bottles known hitherto.
These known flowable coating materials are solvent-free for reasons of environmental protection. The disadvantage of this is that these coating materials have relatively high viscosity and cannot be applied simply by injection, dipping or casting. These high-viscosity coating materials are therefore, at the present time, applied in extruded form through a casting or injection head onto the bottle to be coated itself and are then distributed or levelled off by blowing, or also by downstream rolls, on the outer surface of the bottle to be coated. In this respect, it is also known to apply the plastic extrusions to a roll and to transfer these by means of this onto the outer surface of the bottle to be coated. In this known technique, therefore, the bottle 21809~2 -held rotatably at its head and at its bottom is rotated;
the said roll or roller is brought to bear on this rotated bottle and is kept in contact with the bottle for some time, 80 that the coating material is distributed on the bottle surface. These rollers used hitherto had a purely cylindrical shape. On account of this, the coating material was not distributed uniformly over the surface of the bottle. Losses and defective coatings consequently occurred. Moreover, the coated bottles often did not satisfy the quality criteria placed on them.
The object of the invention is, therefore, to provide an apparatus, a roller and a method, by means of which high-viscosity solvent-free coating materials can be applied to mouldings reliably, uniformly and reproducibly.
This object is achieved by means of the teaching of the claims.
The apparatus according to the invention, like the apparatuses known hitherto, possesses a device for transporting and rotatably holding the mouldings to be coated. This device is referred to below as a transport device. Furthermore, the apparatus according to the invention is equipped with a sprinkler head for the coating material and with at least one rotatable roller which can be pressed onto the moulding to be coated and which can be lifted off again. The axis of rotation of the roller, in the pressed-on state, is arranged at least essentially parallel to the axis of rotation of the moulding to be coated and serves for distributing the coating material on the outer surface of the moulding.
This roller, after distributing the coating material, is moved away from the moulding. The coating material distributed on the moulding is then cured in a way known per se, 80 that a protective outer layer or coating forms.
The high-viscosity solvent-free coating systems or lacquer systems employed in this case are especially those with a viscosity of 40,000 mps at approximately 10C up to 1,000 mps at approximately 100C, especially 30,000 mps at 20C to 5,000 mps at 70C.
The expression "rotationally symmetrical" used here is not to be understood in the strictly mathematical sense. According to the invention, mouldings which deviate slightly from rotational symmetry can also be coated.
The inventive essence of the present invention i8 that the roller for distributing the coating material possesses an outer contour shaped complementarily to the outer contour of the moulding. In other words, the profile of the roller represents the negative profile of the moulding to be coated. It may also be said that, in the region in which the moulding and roller come into contact, the lateral profile line of the moulding pro-jected onto a plane coincides approximately with thelateral profile line of the roller likewise projected onto a plane. This criterion can be satisfied even when the moulding and roller have different dimensions, in which case the roller and moulding can rotate at differ-ent speeds. According to a preferred embodiment, however,the roller and moulding have comparable or similar dimensions. Nore specifically, this means that the sum of the radius of the roller and the radius of the moulding results, at any point along the longit~ n~l axis or axis or rotation, in approximately the same value which corresponds approximately to the distance between the two axes of rotation in that state in which the moulding and roller are pressed on one another. It could also be said that the roller has the rotationally symmetrical negative shape of the moulding to be coated or that the roller represents, in relation to the axis of rotation, the rotationally symmetrical complementary shape of the moulding to be coated.
The subject of the invention is therefore also a roller of this type for the coating of the outer surface of rotationally symmetrical mouldings.
By virtue of the shape of the roller according to the invention, it is possible for high-viscosity coating materials to be distributed uniformly, at high production speeds, onto glass hollow bodies to be coated, 80 that, after curing, a homogeneous, uniformly distributed coating is obtained. In this case, the high-viscosity coating materials employed are expediently processed at an operating temperature of 30-100C, especially at 40-60C, or are heated to this temperature.
According to an P~hodiment which is also pre-ferred, in the apparatus according to the invention, the sprinkler head is arranged in such a way that the coating material iB first applied to the roller and is then transferred, either staggered in time or simultaneously, onto the moulding by means of this roller. In this case, the sprinkler head or applicator device used can be any known device used for this purpose, for example casting strip, nozzle, etc. Expediently, however, the coating material is applied to the roller as long as the roller is not yet in contact with the moulding to be coated.
Moreover, the apparatus according to the inven-tion expediently has a metering device known per se. By means of this metering device, an individually adjustable specific quantity of coating material can be applied from a correspo~;ng casting strip onto different regions of the roller in each case via individual combined nozzles, 80 that as uniform a distribution as possible can take place. This metering device can also be designed and controlled in such a way that different quantities of coating material are applied to different regions of the roller simultaneously.
In the apparatus according to the invention, at least either the moulding or the roller is positively rotated. If the moulding is positively rotated, then the roller is positively rotated in the opposite direction when the moulding comes to bear on it. The same applies conversely if the roller is positively rotated. The moulding and roller are preferably positively rotated in opposition, especially at the same rotational speed. If the coating material is applied first to the roller, then the roller and the moulding to be coated are kept in contact until the coating material used is transferred in sufficient quantity or completely.
According to an embodiment which is also pre-ferred, the roller according to the invention possesses an inelastic core and an elastic transfer material applied to the outside of the latter. In this case, the core can be a cylinder; in this case, the transfer material is "responsible" for the outer contour or for the external shape of the roller. The thickness of the transfer material therefore also changes according to the variation, along the longitll~;n~l axis, in the shape of the moulding to be coated.
According to an embodiment which is also pre-ferred, the elastic transfer material has approximately the same layer thickness over the entire length. In this case, the shape of the core is approximately the comple-mentary shape of the moulding to be coated.
In the two embodiments last described, the core can possess, on its outer generated surface, a plurality of radially continuous grooves, into which radially inward-projecting beads of the transfer material engage, so that an axial displacement of transfer material relative to the core is prevented.
It is also possible, of course, for the core to possess beads which are radially continuous on the outside and which engage into continuous grooves cut out in the transfer material. The core expediently possesses a central continuous bore, concentric to the axis of rotation, for receiving a bearing shaft, etc.
The transfer material can be open-pored and consist of sponge rubber, foamed plastics or fibrous natural products, for example lambskin. Furthermore, the transfer material can be closed-pored and be composed of sponge rubber, types of caoutchouc and foamed plastics, especially EPDM and polyurethane plastics. The composi-tion of the transfer material and, of course, also of thecore is expediently to be selected in such a way that it is compatible with the coating materials, does not swell and is also not chemically attacked. Thus, for example, there should be compatibility towards coating materials - 2~096~
based on formulations of polyurethane, acrylate, epoxy and synthetic resin. Moreover, the transfer material should withstand mechanical stresses for as long as possible.
The rotationally symmetrical core of the roller can consist of wood, plastics and metals, especially aluminium or steel of any quality.
On account of the fact that the roller is con-structed from a core and a transfer material, the trans-fer material can be eliminated and renewed according to fixed criteria of use or of wear, 80 that the require-ments in terms of the uniformity of distribution of the coating material are fulfilled.
The transfer material expediently has a thickness 15 of l to 100 mm, especially 30 mm. Especially when the transfer material has a uniform layer thickness over the entire length, as uniform a pressing force as possible and therefore also as good a distribution of the coating material as possible are afforded.
All transport devices known hitherto can be used as a transport device of the apparatus according to the invention. Preferably, however, the transport device serves for the simultaneous transport of a plurality of approximately uniformly spaced mouldings. A transport device of this type can, for example, be a star feeder or a similar device. Preferably, however, the transport device is a conventional conveyor chain, in which the mouldings to be coated are held rotatably 80 as to lie horizontally and at the same time be spaced from one another.
The apparatus according to the invention prefer-ably has a plurality of rollers for the simultaneous coating of a number of mouldings corresponding to the n-~mher of rollers. In this case, the mutual spacing of the rollers corresponds approximately to the mutual spacing of the mouldings in the transport device. In this case, the rollers are preferably held in a lifting carriage which, starting from an initial position, is moved in the direction of the transport device in such a -way that the rollers are pressed approximately simulta-neously onto the mouldings to be coated. In this pressed-on state, the lifting carriage is then moved at the same speed as the transport device and parallel to this transport device, 80 that the rollers are kept pressed against the mouldings. After a predetermined distance or after a predetermined time, the lifting carriage together with the rollers is lifted off from the mouldings and returns to its initial position again.
This lifting carriage is equipped with at least one sprinkler head having, for example, a casting strip.
If there is only one sprinkler head, this must be moved up and down in such a way that, during a cycle, each roller is provided with a ~ufficient coating quantity. In this case, the coating quantity is preferably transferred onto the roller in the time interval in which the roller is not in bearing contact on the mouldings.
Preferably, however, the lifting carriage is equipped with a nl~her of sprinkler heads correspon~; ng to the number of rollers. In this case, these sprinkler heads are arranged stationarily relative to the lifting carriage. In other words, each roller is assigned its own sprinkler head.
According to an embodiment which i6 also pre-ferred, the rollers are held rotatably on a revolvingendless chain. This endless chain iæ guided in such a way that a plurality of rollers are simultaneously held in bearing contact on the mouldings assigned to them and are moved at the speed of the transport device parallel to the latter. This endless chain is guided approximately in the same way as the chain of a crawler tractor.
It was ætated above that the mouldingæ or bottleæ
to be coated are held rotatably both at the head and at the bottom in the transport device. This two-sided holding is necessitated primarily by the fact that, when the roller is pressed on, it is necessary, on account of the high-viscosity coating material, to exert an appreciable pressure which must, of course, be absorbed by the means of holding the bottle.
2 1 80q6~
It may also be necessary, in the effort to save further weight, to coat the bottom of a bottle. In this case, it is possible to mount the bottle in the transport device at the head only, for example by means of an exp~n~;ng mandrel engaging into the bottle mouth. How-ever, if a roller described here were to be pressed onto a bottle mounted in this way, there would be a great risk that the bottle neck would break off.
In order to counteract this risk, according to a preferred embodiment, the apparatus according to the invention is equipped with at least one supporting roller which is arranged opposite the roller for distributing the coating material and which, at least in that region in which the roller is pressed against the bottle to be coated, is likewise pressed from the opposite side onto the bottle to be coated, 80 that only slight loads occur on the mouthpiece at the point where the bottle is held.
This supporting roller must, of course, be guided and moved, parallel to the bottle to be coated, at the same speed as the transport device and as the roller which serves for distributing the coating material.
When the roller for distributing the coating material is brought to bear from above against the bottle to be coated, the said supporting roller is, of course, pressed from below virtually as an abutment against the bottle to be coated. The supporting roller too must, of course, be mounted rotatably.
A conventional cylindrical roller can be employed as a supporting roller. Expediently, however, this supporting roller has the same shape as the roller for distributing the coating material.
According to an embodiment which iR also pre-ferred, a plurality of, especially two supporting rollers located next to one another are provided, the lateral spacing of the two supporting rollers being selected in such a way that they form a kind of bed or bearing for the bottle to be coated. The lateral spacing of the mutually confronting outer generated surfaces of the supporting rollers is therefore smaller than the diameter of the bottle to be coated. In other words, if, as seen in the direction of the axes of rotation, the axis of rotation of the roller for distributing the coating material is connected to the axis of rotation of the bottle and this i8 in turn connected to the two axes of rotation of the supporting rollers, then a Y iæ obtained, this Y preferably "st~n~;ng on its head". In this caæe too, the supporting rollers can be shaped in respect of their outer contour in the same way as the roller for distributing the coating material.
The invention is explained in more detail below by means of figures representing the preferred embodi-ments. Of the figures:
Figures 1 to 3 each show a side view of a bottle to be coated and a section through the associ-ated roller of complementary shape according to the invention;
Figure 4 shows a sketched functional representa-tion of the apparatus according to the invention with a lifting carriage having a plurality of rollers and sprinkler heads;
Figure 5 shows a representation correspo~; ng to that of Figure 4, but with only one sprinkler head;
Figure 6 shows a representation corresponding to that of Figure 4, but in which the rollers are held on a revolving endless chain;
30 Figure 7 shows a representation corresponding to that of Figure 6, but in which there are only two sprinkler heads; and Figure 8 shows a perspective view of a moulding to be coated, with an associated roller and an assigned sprinkler head.
In Figure 4, a transport device 2, here a trans-port chain, of the apparatus according to the invention is shown in greatly simplified sketched form. A transport chain 2 of this type is known. The mouldings, here 2 1 ~09~2 bottles 3, to be coated are held horizontally and are arranged parallel to one another at an approximately equal spacing. At the same time, the bottles are held at the head and at the bottom, for the bottles have a suffi-cient wall thicknes6 in these regions, 80 that these regions do not have to be coated. The bottles 3 can be rotated about their longitl~; n;-l axis.
The lifting carriage 5 shown in Figure 4 is equipped with four rollers 4 which are described in more detail further below. These rollers 4 are at a mutual spacing which corresponds to the mutual spacing of the bottles 3. Each of the rollers 4 is equipped with a separate sprinkler head 6, through which the coating material is applied in metered quantity onto the associ-ated roller 4.
The lifting carriage 5 can execute both a translational to-and-fro movement and a lifting movement according to the arrows shown in Figure 5. To carry out the coating operation, the lifting carriage is brought from an initial position (not shown), in which the rollers 4 and bottles 3 are not in contact with one another, into the position shown in Figure 4. From there, the lifting carriage 5 is moved parallel to the transport chain 2 and at the same speed in the direction of the arrow pointing to the right. At the same time, the coating material applied to the rollers 4 is transferred onto the bottles 3 and distributed on their outer sur-face. In this case, the bottles 3 and the rollers 4 are both positively rotated in opposition.
After a predetermined time or after a predeter-mined distance, the lifting carriage is raised and returns to its initial position (not shown). During this cycle of movement, the coating material is applied in metered quantity onto the rollers 4 which continue to be rotated.
The mouldings and rollers employed in this case can have the shapes shown in Figures 1 to 3. As emerges from these Figures, the outer contour 8 of the roller 4 according to the invention has a shape complementary to 21 80q~
the outer contour 9 of the bottle 3. In this case, the sum of the radius a (see Figure 1) of the bottle 3 and the radius b of the roller 4 is equal to the distance between the longitn~;n~l axis of the bottle 10 and the longitl-~;n~l axis 11 of the roller 4 in the pressed-on state. In other words, the sum of a and b corresponds to the sum of x and y of Figure 1, but it is assumed, in this case, that the transfer material 12 of the roller 4 is not compressed in the pressed-on state. However, this is so in actual fact. The above calculations therefore relate to the state in which the roller 4 is pressed onto the bottle 3 without any compression of the transfer material 12. During the actual coating operation, however, the transfer material 12 is compressed slightly.
The roller 4 according to the invention and the bottle 3 are held rotatably and mounted on their two end faces. The devices necessary for this purpose are known and are therefore not shown.
The roller 4 possesses a hollow-cylindrical core 13 which is surrounded on the outside by the transfer material 12. The core 13 possesses, on its outer gener-ated surface, a plurality of radially continuous grooves 14, into which radially inward-projecting beads 15 of the transfer material 12 engage.
In the embodiment shown in Figure 2, the core 13 is virtually the cause of the negative shape of the roller 4. This core 13 carries, on its outer generated surface, the transfer material 12 which has approximately the same layer thickness along the longitudinal axis 11.
This uniform layer thickness guarantees that the pressing force and consequently also the distribution of the coating material are approximately the same over the entire outer surface of the bottle 3.
The representation shown in Figure 5 corresponds essentially to the representation of Figure 4. The difference is that, in the embodiment shown in Figure 5, there is only one sprinkler head 6 which is moved to and fro, so that the coating material is applied to all four rollers 4. The sprinkler head 6 is thus movable to and _ - 13 -fro relative to the lifting carriage (not shown).
The representation shown in Figure 6 also corre-sponds approximately to the representation shown in Figure 4. However, the rollers 4 are held on an endless chain 16 revolving in the manner of a crawler tractor. In this case, starting from an initial position A, the rollers 4 are guided relative to the transport chain 2 and are brought to bear on a bottle 3. From this position B, the roller 4 is guided parallel to the tranæport chain 2, with the roller 4 and bottle 3 rotating in opposition, as far as a point C. There, the roller 4 is lifted off from the bottle 3 and guided to the point D. There, the coating material is applied to the roller 4 by means of the sprinkler head 6.
In this case, the lifting carriage 5 possesses four sprinkler head~ 6 and can be moved to and fro according to the upper arrow x.
In this embodiment too, the sprinkler heads 6, together with the associated carriage, are moved to and fro horizontally. In this case, however, there is no need for raising and lowering again.
The embodiment shown in Figure 7 corresponds approximately to the embodiment shown in Figure 6. The difference is that the carriage 5 possesses only two sprinkler heads which are moved to and fro according to the arrow x.
Moreover, in all the embodiments, the rotational speed of the bottle and roller can be especially 1 revolution per minute to 300 revolutions per minute. This rotational speed is expediently adjustable.
Figure 8 shows a typical sprinkler head 6 with a casting strip 18. From this casting strip 18, the necess-ary coating material is transferred in metered quantity onto the roller 4. The design of the sprinkler head is, in this case, of a conventional kind.
The roller 4 possesses the core 13 already described above, with the elastic transfer material 12 and with a central continuous bore 17 concentric to the axis of rotation. This roller 4 is pressed against the 2 1 8~q62 bottle 3 and at the same time transfers the coating material onto the bottle 3 and distributes it over the outer surface of the latter.
Due to the fact that each bottle to be coated or each moulding to be coated is asæigned its "own" roller, it is also possible to allow for the frequently occurring fact that a location for a moulding 3 in the transport device 2 is often not occupied by the moulding 3 to be coated.
The apparatus according to the invention can therefore be equipped with a detecting device (not shown) which ascertains whether, at a location for a moulding in the transport de~ice 2, a moulding of this type is actually present or not. If no moulding to be coated i8 present, then this information is c~mmnn;cated to a control and regulating device for metering the quantity of coating material. This control device then ensures that no coating material is transferred onto the roller 4 if the moulding to be coated or the bottle 3 to be coated is not present in the transport device 2. This ensures that, for each bottle, the intended quantity of coating material is applied to the respective roller and is then transferred from this onto the bottle 3 to be coated. In other words, there is no possibility that the coating material applied to the respective roller in one work cycle will not be transferred onto the bottle 3, but remains on the roller 4, onto which the same coating quantity is then applied once again in the next work cycle, 80 that double the coating quantity is subsequently transferred onto the next bottle to be coated. A reproducible and uniform coating meeting the requirements is thereby achieved.
Claims (17)
1. Apparatus for the coating of the outer surface of rotationally symmetrical mouldings, especially bottles, with a device (2) for transporting and rotatably holding the mouldings to be coated (transport device), with a sprinkler head (6) for the coating material and with at least one rotatable roller (4) which can be pressed onto the moulding (3) and can be lifted off again and the axis of rotation (11) of which, in the pressed-on state, is arranged at least essentially parallel to the axis of rotation (10) of the moulding (3), for distributing the coating material on the outer surface of the moulding (3), characterized in that the roller (4) possesses an outer contour (8) shaped complementarily to the outer contour (9) of the moulding (3).
2. Apparatus according to Claim 1, characterized in that the sum of the radii of the roller (4) and the moulding (3) at any point along the longitudinal axes or axes of rotation (10; 11) corresponds approximately to the distance between the two axes of rotation (10; 11) in the pressed-on state.
3. Apparatus according to Claim 1 or 2, character-ized in that the coating material is first applied to the roller (4) and is then transferred onto the moulding (3) by means of the latter.
4. Apparatus according to one of the preceding claims, characterized in that the moulding (3) and the roller (4) are positively rotated in opposition, especially at the same rotational speed.
5. Apparatus according to one of the preceding claims, characterized in that the roller (4) possesses an inelastic core (13) and an elastic transfer material (12) applied to the outside of the latter and having especially a uniform layer thickness.
6. Apparatus according to one of the preceding claims, characterized in that a plurality of approximately uniformly spaced mouldings (3) are trans-ported continuously by means of the transport device (2), and in that a plurality of rollers (4) are provided, the mutual spacing of the rollers (4) corresponding approxi-mately to the mutual spacing of the mouldings (3).
7. Apparatus according to Claim 6, characterized in that all the rollers (4) are held in a lifting carriage (5) which, starting from an initial position, is moved in the direction of the transport device (2) in such a way that the rollers (4) are pressed approximately simulta-neously onto the moulding (3) which is assigned to them in each case and which is then moved at the speed of the transport device (2) and parallel to the latter, is moved away from the transport device (2) and returns to its initial position again.
8. Apparatus according to Claim 7, characterized in that each of the rollers (4) of the lifting carriage (5) is equipped with a separate sprinkler head (6).
9. Apparatus according to Claim 7, characterized in that the lifting carriage (5) is equipped with only one sprinkler head (6) which can be moved to and fro in such a way that the required coating material is applied to each roller (4).
10. Apparatus according to Claim 6, characterized in that the rollers (4) are held on a revolving endless chain (16), which is guided in such a way that some of the rollers (4) are kept simultaneously in bearing contact on the moulding (3) assigned to them in each case and are moved at the speed of the transport device (2) parallel to the latter.
11. Apparatus according to one of the preceding claims, characterized in that the mouldings (3) are held in the transport device (2) so as to lie horizontally parallel to one another and the rollers (4) are pressed onto the mouldings (3) from above.
12. Roller for the coating of the outer surface of rotationally symmetrical mouldings, especially bottles, characterized in that the roller (4) possesses an outer contour (8) shaped complementarily to the outer contour (9) of the moulding (3) to be coated.
13. Roller according to Claim 12, characterized in that the sum of the radii of the roller (4) and the moulding (3) at any point along their longitudinal axes or axes of rotation (10; 11) corresponds approximately to the distance between the two axes of rotation (10; 11) when the said roller and said moulding are brought to bear parallel to one another.
14. Roller according to Claim 12 or 13, characterized in that the roller (4) possesses an inelastic core (13) and an elastic transfer material (12) applied to the outside of the latter and having especially a uniform layer thickness.
15. Method for the coating of the outer surface of rotationally symmetrical mouldings, especially glass bottles, coating material being applied to the rotatably mounted moulding and being distributed on the surface of the moulding by the pressing of a rotatable rotationally symmetrical roller, the axis of rotation of which, in the pressed-on state, is arranged approximately parallel to the axis of rotation of the moulding, onto the moulding and by the rotation of the roller and moulding in opposi-tion, and, after the roller has been lifted off, being dried in a way known per se, characterized in that a roller, the outer contour of which is shaped complementarily to the outer contour of the moulding, is used.
16. Method according to Claim 15, characterized in that the coating material is first applied to the roller and is then transferred, staggered in time, onto the moulding by means of the latter.
17. Method according to Claim 15, characterized in that the coating material is applied to the roller and is transferred simultaneously onto the moulding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4440393A DE4440393C3 (en) | 1994-11-11 | 1994-11-11 | Device for coating rotationally symmetrical moldings |
| DEP4440393.3 | 1994-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2180962A1 true CA2180962A1 (en) | 1996-05-23 |
Family
ID=6533113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002180962A Abandoned CA2180962A1 (en) | 1994-11-11 | 1995-11-10 | Device and roller for coating rotationally symmetrical moulded bodies |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0739249B1 (en) |
| AT (1) | ATE176765T1 (en) |
| BR (1) | BR9506483A (en) |
| CA (1) | CA2180962A1 (en) |
| CZ (1) | CZ204996A3 (en) |
| DE (2) | DE4440393C3 (en) |
| MX (1) | MX9602504A (en) |
| WO (1) | WO1996014940A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749970A (en) * | 1995-03-30 | 1998-05-12 | Ngk Insulators, Ltd. | Apparatus for coating outer peripheral surface of columnar structural body with a coating material |
| DE19854561A1 (en) * | 1998-11-26 | 2000-05-31 | Coronet Werke Gmbh | Roller for applying a medium, in particular paint roller |
| DE102004036275B4 (en) * | 2004-07-27 | 2016-10-20 | Krones Aktiengesellschaft | Apparatus and method for coating |
| DE102007049326A1 (en) * | 2007-10-12 | 2009-04-23 | Gerhart, Edith | Applying device for applying decoration on round/oval object i.e. flower container, has rotatably supported die unrolled on surface of object held by holding device in rotatable manner, where die partially prints object with color |
| DE102009012406B8 (en) * | 2009-03-10 | 2020-12-31 | Shao-Hsien HSU | Apparatus and method for coloring an identifiable screwdriver blade |
| DE102009043332A1 (en) * | 2009-09-28 | 2011-03-31 | Optipack Gmbh | Apparatus and method for transferring a coating composition |
| CN104998794B (en) * | 2015-07-25 | 2017-05-03 | 大埔县怡丰园实业有限公司 | Special brushing device for ceramic surface finish machining |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3839989A (en) * | 1972-03-08 | 1974-10-08 | O Niederer | Egg oiler |
| DE2830316C3 (en) * | 1978-07-10 | 1981-10-08 | Desma-Werke Gmbh, 2807 Achim | Injection or pouring head for coating objects with flowable material, especially plastic |
| DE2937815A1 (en) * | 1979-09-19 | 1981-04-02 | Basf Ag, 6700 Ludwigshafen | METHOD FOR PRODUCING 3,3-DIMETHYL-PENT-4-EN-ACIDAMIDES |
| DE2938309A1 (en) * | 1979-09-21 | 1981-04-09 | Chemische Werke Hüls AG, 4370 Marl | METHOD FOR COATING GLASS SURFACES AND GLASS OBJECTS RELATED WITH A DUROPLASTIC PROTECTIVE LAYER |
| DE2938229A1 (en) * | 1979-09-21 | 1981-04-02 | Chemische Werke Hüls AG, 4370 Marl | METHOD FOR COATING GLASS SURFACES AND GLASS OBJECTS RELATED WITH A DUROPLASTIC PROTECTIVE LAYER |
| DE3211364A1 (en) * | 1982-03-27 | 1983-10-20 | Veba-Glas Ag, 4300 Essen | Process and apparatus for coating the outer surfaces of hollow glass articles |
| DE3325363A1 (en) * | 1983-07-14 | 1985-01-24 | Alcoa Deutschland Gmbh Maschinenbau, 6806 Viernheim | Device for reworking glass abrasion on returnable bottles |
| CA1234688A (en) * | 1984-04-27 | 1988-04-05 | Yogiro Okawa | Coating apparatus for scratches of glass bottle |
| DE4012331C2 (en) * | 1990-04-18 | 1994-02-24 | Kronseder Maschf Krones | Labeling machine for bottles or the like |
-
1994
- 1994-11-11 DE DE4440393A patent/DE4440393C3/en not_active Expired - Fee Related
-
1995
- 1995-11-10 AT AT95939261T patent/ATE176765T1/en not_active IP Right Cessation
- 1995-11-10 BR BR9506483A patent/BR9506483A/en not_active Application Discontinuation
- 1995-11-10 MX MX9602504A patent/MX9602504A/en not_active Application Discontinuation
- 1995-11-10 CA CA002180962A patent/CA2180962A1/en not_active Abandoned
- 1995-11-10 WO PCT/EP1995/004437 patent/WO1996014940A1/en active IP Right Grant
- 1995-11-10 EP EP95939261A patent/EP0739249B1/en not_active Expired - Lifetime
- 1995-11-10 DE DE59505121T patent/DE59505121D1/en not_active Expired - Fee Related
- 1995-11-10 CZ CZ962049A patent/CZ204996A3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE59505121D1 (en) | 1999-03-25 |
| EP0739249B1 (en) | 1999-02-17 |
| DE4440393C3 (en) | 1999-10-21 |
| ATE176765T1 (en) | 1999-03-15 |
| BR9506483A (en) | 1997-10-07 |
| DE4440393C2 (en) | 1996-09-05 |
| DE4440393A1 (en) | 1996-05-23 |
| WO1996014940A1 (en) | 1996-05-23 |
| CZ204996A3 (en) | 1997-02-12 |
| MX9602504A (en) | 1997-05-31 |
| EP0739249A1 (en) | 1996-10-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |