DE2145439A1 - Device for applying enamel to an object - Google Patents

Description

Dr. F. Zumsialn sun. - Dr. E. Aösmann Dr. R. Koenlgsberger - Dlpl.-Phys. R. Holzbauer - Dr. F, Zumstein Jun.

PATENT LAWYERS

2U5439

TELEPHONE: COLLECTIVE NO. 225341 TELEGRAMS: ZUMPAT CHECK ACCOUNT: MUNICH 91139

BANK ACCOUNT: BANK H. AUFHAUSER

8 MUNICH 2.

Oasis 7-0 13377
5 / th

PERRO (HOLLAND) N.V., Rotterdam / Netherlands

Device for applying enamel to an object

The invention relates to a device for applying enamel to an object.

In particular, the present invention relates to the application of enamel in two or more colors to one and the same object in a single, continuously operating device.

It is known to apply enamel in one color to, for example, the inside of a bowl with the aid of a machine and to provide enamel of a different color on the outside of the bowl using a subsequent machine. For the A third machine is required to apply the enamel in a third color to the edge of the bowl. Since every machine a guide device for the objects to be enamelled, a spray device for the enamel, a cleaning device for the objects, a drying device for the enamel applied and a cleaning device for the guide device must have, the use of two or more separate machines is very expensive and beyond

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time consuming.

In addition, a guide or conveyor device is known, in which the object is held in a clamping device. The clamping of the object in this clamping device is time consuming and the clamping device leaves marks on the object.

The invention is therefore based on the object mentioned above To overcome disadvantages.

The device according to the invention is characterized by at least a frame which is connected to an endless chain, the frame at least one freely rotatable roller and at least has a freely rotatable wheel.

The item is simply placed on the wheels and the roller and borne by them. For this reason, the carrier or guide device can be used for almost all common diameters used by items such as bowls and the like.

Furthermore, the invention is a uniform application of the enamel on the objects and a uniform implementation other operations such as cleaning and drying. For this reason the wheels run along at least one Part of the path of the endless chain on a rail so that they are rotated. This rotates the object around its axis. ·

To apply the enamel inside the object, according to the invention Each frame has a cam that can be pressed down and the cover elements in the depressed 7-state swings to the side, with the Abäeckelcccrnte to one Spray device for spraying the enamel from below. According to the invention the spray device can have at least one spray device, at least one cover element that is one point opposite the spray gun can be swiveled, a container

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below the spray gun and a pump which pumps from the container to the spray gun, wherein the cover element is pivoted back into its position opposite the spray gun by spring force. So that the enamel color can be easily changed can be, the spray device is preferably movable into and out of the device and with a Provide a piece of rail for the wheels on the frame. When using the spray device when choosing a specific enamel color has been moved out of the device, another spray device with a different enamel color can be inserted into the device be introduced.

The edge of an object should be freed of already applied enamel, leaving enamel of a different color on the edge of the object can be applied, and that it is prevented that the applied externally on the object Enamel is mixed with the enamel of another color that is already applied to the inside of the item. For this purpose, the device according to the invention can be a -Cleaning device with a trough filled with cleaning fluid and a rail section that passes through the liquid is provided. The cleaning fluid is passed through the wheels, which are located on the rail section rotate, conveyed from the trough to the edge of the object carried by the wheels.

Enamel can thereby be applied to the outside of the object that the device according to the invention is provided with a spray device for spraying enamel from above, wherein the spray device comprises a spray gun, a trough or container below the spray gun and a pump, which is operated by the Pumps trough to the spray gun, has. This prevents the enamel from de * · .; Object is splashed away, gives the Spray gun preferably from a curtain of enamel particles, the shape of which is adapted to the shape of the object. Compartment this Spraying process, the bottom of the object can be cleaned by using the device according to the invention with a cleaning device is provided that a cockroach device and a

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Sanmeltrog comprises, wherein the object with the switching device is brought into contact with the aid of the frame for carrying the object during the movement along the scraping device. A cleaning device of this type may have a rail section for the wheels which is in relation to the others Rail sections located in a "lower position, so that the object tilts against the scraper and the tipped object is no longer in contact with the rollers, but is still supported by the wheels driven by the lowered rail section can be rotated.

In order for the enamel to settle and the finished item to be easily removed from the supporting frame, a Rotation of the object can be avoided. This is done according to the invention by miter links, which the frame during the passage of the frame over a gap between two rail sections support, .where the gap is the rotation of the 3r wheels interrupts.

To remove the object from the supporting frame, for example for transfer to a control tape, the device according to the invention can have a device through which the frame is pivoted to a position of greater inclination so that the item is tilted and pivoted out of the downward position Frame is ejected.

Can be used to apply enamel to the edge of the object äie device according to the invention have a device by means of which enamel is applied with the aid of the frame wheel, the device being provided with a trough for enamel and a rail section which passes through the enamel in the trough. The single device described above for all operations saves time and money compared to the known ones Fixtures

The following are, for example, preferred embodiments the invention explained in more detail with reference to the accompanying drawing

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Fig. 1 is a schematic plan view of the apparatus showing the positions of the sub-assemblies;

Pig. Fig. 2 is a schematic side view of a carrier for an object in the normal running position of the device;

FIG. 3 is a schematic plan view of the carrier of FIG Pig. 2;

Pig. 4 is a schematic, partially sectioned side view " a spray device for applying enamel within an object;

Pig. Figure 5 is a schematic plan view of the Pig's apparatus. 4;

Pig. 6 is a schematic, partially sectioned side view the device for cleaning the edge of the object or for applying the enamel to the edge of the object;

Pig. 7 is a schematic, partially sectioned side view a device for applying the enamel to the exterior of an object;

Pig. Fig. 8 is a partially sectioned schematic side view means for cleaning the bottom of the article;

Pig. Fig. 9 is a partially sectioned schematic side view a drying oven;

Pig. Fig. 10 is a schematic side view of a device for dispensing the articles;

Pig. 11 is a partially sectioned schematic side view a device for cleaning the carrier »

That in Pig. 1 shown embodiment of a device according to the invention comprises an endless conveyor chain 14 »which revolves around deflection wheels 12 and 13. The endless chain can be continuously driven by the pulleys and is coupled to a large number of carriers 15, of which in Pig. 1 only some are given

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You can also find in Pig. 1 further parts serving as examples:

A loading point 1 for posting the objects to be enamelled on the carrier 15, a device 2 for applying the Enamel on the inside of the object, a device 3 for removing the enamel from the edge of the object, a Device 4 for applying the enamel to the outside of the object, a device 6 for removing the enamel from the edge of the object, a drying oven 7, a device 8 for applying the enamel to the edge of the object, a Removal point 9, a device 10 for cleaning the carrier 15 and a device 11 for blowing dry the carrier. Each carrier 15 can sequentially pass through the facilities, however the devices can also be arranged in a different order. Furthermore, some facilities can be left out such as the device for treating the edge of the object if an edge is of a different color is not necessary. It is also possible to add some facilities if a particular working method so makes necessary. The carrier 15 and the other facilities are to be described in detail below.

Corresponding to I ¹ Ig. 2 and 3, each carrier 15 comprises a frame 16 which is pivotally connected to the chain 14. A roller 17 is freely rotatably mounted in the frame. Also two wheels 18 are freely rotatably mounted on the frame, the wheels running on a rail 19 so that the wheels turn when the endless chain 14 is moved. Since the frame 16 is pivotally connected to the chain 14 via an articulated connection 24, the position of the rail 19 determines the position of the carrier by raising or lowering the wheels. The object to be treated, which is shown in the drawing as a bowl 20, but can also be another object, rests with its edge 21 on the roller 17 and the wheels 18. Therefore, the bowl is rotated through the wheels so that the entire surface of the bowl can be treated evenly . Because of the roller 17 and the wheels 18, it is possible to convey objects of very different durometers. In addition, will

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entrapment of the objects and consequently the emergence of Avoid marks as a result of entrapment on the objects.

The chain 14 runs along a frame 55 'to which the rail 19 is fastened with the aid of supports 22. These supports can carry a collecting trough 23. The objects 20 provided on the carriers 15 become, for example, one by the chain 14 Spray device 2 promoted, the corresponding Pig. 1 behind the part 1 of the device for applying the objects to the Carrier is provided. Correspondingly 3? Ig. 4, the spray device comprises a trough 25 which is filled with liquid enamel, a line 26 leading from the trough to a pump 27, and a line 28 leading from the pump to the spray nozzle 29. As can be seen from Fig. 5, the spray device can be provided with two upwardly directed spray nozzles 29 which the Spray Erna LlIe against the inside of the object 20 on the carrier 15 · To avoid splattering of the enamel -between two consecutive objects in a continuous How the pump operates, a cover element 30 is provided for each spray nozzle. Each cover element 30 is pivotable arranged around a pin 31, this pin being connected to the rest of the spray device. In the normal division each cover device lies opposite the associated spray nozzle. Therefore, the spray nozzle sprays the enamel against the cover plate, from where the enamel drips into the trough 25 and is then pumped out and sprayed. On each carrier 15 is a cam 32 is provided on the front of the frame 16. This cam can from its normal upper position in a be pressed in the lower position. If an object 20 is provided on a carrier 15, the associated Cam 32 pressed down. The cover elements 30 lie in the path of the cam in its depressed position, so that ε ie when the 4-way cam moves forward together with the carriage 15 is pivoted to the side · When the cover elements 30 are pivoted to the side, the enamel can be removed from the spray nozzle 29 from being sprayed into the article 20. After some time, each cover element 30 is released from the depressed cam.

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give and the released cover springs into their normal position back, that is to say in the position opposite the spray nozzles 29 and thus interrupt the enamel jet, so that the Enamel drips into trough 25. When a carrier 15 is not carrying an item 20, the cam 32 is not depressed, so that the cam goes over the cover 30 and the cover above the spray nozzles 29 to interrupt the Enamel jet remain.

Above the trough 25, a further rail section 19 is provided for supporting the wheels 18 of the carrier 15 so that the wheels turn. The object 20 is carried by the rotating wheels and is therefore rotated> and the rotation of the object results in the application of a uniform layer of enamel on the inside. The entire spray device 2 can run on rollers 33 and is therefore removable from the device, so that the spray device can easily be replaced by another, identical spray device or completely omitted can be. In this way, a spray for a specific color of enamel can quickly go through a same Device can be exchanged for a different enamel color. Each spray device comprises its own rail section 19 for the wheel 18 of the wearer. With sufficient length of the trough 25 in the direction of the movement of the carrier 15 can enamel, which of the object 20 runs out, drip into the trough 25.

The apparatus may further include means for wiping the enamel from the edge of the article. Corresponding Pig. 1 this device can be in a position 3 behind the device for spraying the enamel on the inside of the object and be provided in front of the device 4 for applying the enamel to the outside of the object, so that it is avoided that the enamel on the inside of the object on the edge of the object with the other colored Enamel is mixed for the outside of the item. In the Pig. 6 includes the device 3 z.um Wipe ν α enamel from the edge of the object 20 a Trough 34, which is filled with cleaning fluid, for example water,

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is filled. The rail 19 is lowered into the liquid from the height shown by dashed lines and at the end of the trough 34 rises from the liquid again to the level shown by dashed lines. As the wheels 18 following the rail, each carrier 15 is broken down and up together with the object 20 from and into the The position shown is pivoted about the articulated connection 24 with the chain 14. As a result, the wheels 18 run through the cleaning liquid and convey this liquid onto the edge 21 of the object 20. This liquid is then together with the enamel is removed from the rim by means of the wheels 18.

According to the devices described above, the device 1 is followed by a device 4 for applying enamel to the outside of the object 20. According to Fig. 7, this device 4 comprises a trough 35 containing liquid enamel, a conduit 36 from this trough to one Pump 37 and a line 38 from the pump to a spray nozzle 39. To avoid spraying enamel off the object 20 on the carrier 15, the spray nozzle 39 can be constructed as shown in section in FIG. 7, that is to say it may be provided with an annular slot 40 for spraying enamel. The enamel leaves this slot as a curtain of enamel particles, the shape of this curtain being adapted to the shape of the object 20. The entire spray equipment 4 can be mounted on rollers 41 for removal of the device so that the sprayer can be easily replaced by a other spray equipment can be replaced or omitted. In this way, a spray device 4 for a specific The enamel color can be replaced by an equivalent device for a different enamel color. Above the trough 35 is a rail section 19 is provided for supporting the wheels 18 so that the wheels rotate when the carrier is pushed forward will. The object 20 carried by the rotating wheels is therefore also rotated, and so is the rotation of the item results in the application of a uniform layer of enamel on the outside of the item. With sufficient Length of the trough 35 in the direction of movement of the

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The carrier 15 can be the enamel that runs off the object 20, drip into the trough 35 and are in turn passed to the spray nozzle 39 with the aid of the pump 37.

If it is desired to remove enamel from the outside of the bottom of the item, Pig. 1 a facility 5 can be provided behind the spray device 4. In the embodiment according to FIG. 8, this comprises cleaning device a rail section 19 with a lower height than the height of the remaining rail sections, so that the carrier 15 with the wheels 18 from a normal position shown by dashed lines around the "articulated connection 24 with the chain 14 downward is pivoted. By pivoting the carrier 15 downwards, the center of gravity of the object 20 is laterally above the wheel 18 shifted out so that the object is tilted until the bottom of the object against a scraper 42 strikes. The tipped object is still driven by the wheels

18 supported and therefore rotated in relation to the scraper device, so that the enamel is quickly scraped off the underside of the item. The scraper device 42 can be a channel have, which opens into the trough 43 for collecting the scraped enamel. Since the web 19 then back to normal Height increases, the object 20 is tilted back into the position in which it is supported at the same time by the roller 17 of the carrier 15. The scraper device 42 can consist of rubber, and the arrangement of scraper device, trough 43 and lowered Rail 19 may be mounted on rollers 44 for easy passage through some other device or through a section of rail

19 with normal height can be replaced. If it is desired to provide an enamel of a different color than that of the enamel on the inside and outside of the object on the edge 21 of the object 20, the enamel applied by the device 4 can be removed from the edge. For this purpose, the device can have a cleaning device at point 6 of the Pig. exhibit. Since the cleaning device has already been mentioned with reference to Pig. 6, further discussion is unnecessary

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Since the enamel applied should then be dried, the device is at point 7 in FIG. 1 with a drying device Mistake. This drying device can be thawed in any desired manner, and FIG. 9 merely inputs Example of such a facility again. This example comprises a housing 45 with infrared emitters 46. If the object 20 is conveyed through the housing with the aid of the carrier 15, the enamel is reliably dried.

Subject to the removal of the enamel from the edge of the object in position 6 of the device of FIG. 1, enamel of a different color can be applied to the edge 21 of the object 20 in position 8 of the device. This can be done, for example, with the aid of a device as has already been described in connection with FIG is promoted. This device can be mounted on rollers, as is the case with the spray devices of the Tig. 4 and 7 is the case, and it can be replaced by a rail section 19 if no enamel is to be applied to the edge 21. The device can also be replaced by a similar device for applying enamel of a different color.

If over a certain area of the path the object is moving is not intended to rotate, the device can be provided with supports along this area, over which the carriers 15 slide. These supports replace the rails 19 so that the wheels 18 are no longer rotated

For example, it may be desirable that the object behind the one or behind both spray devices 2 and 4 does not rotate, so that the enamel can settle.

To facilitate the manual removal of the objects from a carrier 15 at the point 9 of the device of FIG It may also be desirable that the wheels 18, and consequently the object 20, not rotate. ^ For this purpose, the

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To replace the rail 19 by supports over which the carrier 15 slide.

Instead of manual removal, the objects 20 can be thrown from the carriers 15 in the position 19 of the device. For this purpose, the rail 19 is omitted in this area, as shown in FIG. The wheels 18 are in not supported in this case, and consequently the carrier 15 pivots about the articulation 24 with the endless chain 14 from the The position shown by dashed lines down into the position in which the carrier 15 is supported by a support 47 on the frame 55 is slidably supported. This leads to the fact that the object is thrown from the carrier and, for example, on a Conveyor belt 48 arrives. This conveyor belt can run, for example, to a control station in front of an oven, to which the objects subsequently be promoted.

After the above process, the carrier 15 is soiled with enamel and should be cleaned in front of the loading point 1 according to FIG. 1, at which the objects to be enamelled are placed on the carrier will. Therefore, according to FIG. 1, a cleaning device 10 is provided which is constructed in any desired manner may be, for example as shown in FIG. 11. Such a cleaning device can rotating brushes 49 and a shower 50 for cleaning liquid, for example water. The sprayed liquid runs from the carrier 15 in a trough 51, from which a line 52 runs via a pump 53 and a line 54 to the shower 50.

Behind the cleaning device 10 can accordingly in the device Fig. 1, a drying device 11 for the carrier 15 follow. In this drying device, hot air can be applied to the Carriers are blown. Subsequently, the carriers are again ready to receive enamelling objects in the loading position 1 of the device according to FIG. 1, and the process described can be repeated.

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Claims (20)

Claims 1. Device for applying enamel to an object, characterized by at least one frame, which is connected to an endless chain, the frame at least one freely rotatable roller and at least one freely Has rotatable wheel. 2. Device according to claim 1, characterized in that that at least along part of the path of the endless chain the wheels run on a rail and consequently be rotated. 3. Device according to claim 1 or 2, characterized in that that the frame is pivotally connected to the endless chain. 4. Device according to one of claims 1 to 3 * thereby gekennze rejects that each frame has a cam that can be printed down and in the Depressed position cover elements pivoted aside, these cover plates to a spray device for Include spraying the enamel from below. 5. Apparatus according to claim 4, characterized in that the spray device has at least one spray gun, at least one cover element which can be pivoted from a position relative to the spray gun, a trough below the spray gun and a pump which closes from the trough the spray gun pumps, wherein the cover elements are pivoted back into their position relative to the spray gun by spring force. 6. Apparatus according to claim 4 or 5 »characterized in that the spray device in the front direction and this is movable away and has a rail nenabschnitt for the wheels of the frame. 209812/1154 -η- 2H5439 7. Device according to one of the preceding claims, characterized by a cleaning device, a trough, which is filled with a cleaning liquid, and a rail section, which is through the liquid • passes through, has. 8. Device according to one of the preceding claims, characterized by a device for spraying Enamel from above, the facility being a spray gun, a trough below the spray gun and a pump running from pumps the trough to the spray gun, has .. 9. Apparatus according to claim 8, characterized in that the spray device in the device is movable in and away from this and has a rail section for the wheels of the frame. 10. Apparatus according to claim 8 or 9, characterized in that that the spray gun emits a curtain of enamel particles, the shape of the curtain on the shape of the object is adapted. 11. Device according to one of the preceding claims, g e - '. characterized by a cleaning device for a part of the object, the device being provided with a scraper device and a receiving trough and the objects coming into contact with the scraper device while they are moved along the scraper device by means of the frame for carrying the object. 12. The device according to claim 11, characterized in that that the cleaning device has a rail section for the wheels, the rail section at a lower level than the other section of the Rail lies so that the object is tilted against the scraper, and wherein the tilted object is the roller leaves, but is still supported by the wheels which are rotated by the lowered rail section. 209812/1154 2H5A39 13. The apparatus of claim 11 or 12, characterized g e identifier refuses that the cleaning device is movable into and away from the device. 14. Device according to one of the preceding claims, characterized by guide elements which support the frame during the passage over a gap between two rail sections, the gap to the Stopping the rotation of the wheels is used. 15. Device according to one of the preceding claims, characterized by a drying oven. 16. Device according to one of the preceding claims, characterized by a device for Pivoting the frame to a position with greater inclination in which the object is tilted and from which downwards swiveled frame thrown off 3. 17. Device according to one of the preceding claims, characterized by a device for applying of enamel using the wheels that have a trough for enamel and a rail section that goes through the enamel trough passes through, includes. 18. Device according to one of the preceding claims, characterized by a cleaning device for the frame, the castors and the wheels, the showers for a cleaning fluid and a pump that is operated by the Collecting trough leads to the showers, includes. 19 · Device according to claim 18, characterized by rotating brushes. 20. Apparatus according to claim 18 or 19, characterized through spray nozzles for dry air. 209812/1154