DE102021132313A1 - Spraying device and method for internal spraying of containers - Google Patents

Abstract

The invention relates to a spraying device (1) for spraying the inside of containers (2), which are arranged upside down in container cells (3) of a container basket (4) of a container cleaning machine that moves in a running direction (5), with a spraying medium (14). The spray device comprises a hollow shaft (6) with at least one row of several spray nozzles (7) along the hollow shaft; a supply device (8) for supplying the hollow shaft with the spray medium; and at least one servo motor for moving the hollow shaft in the container cleaning machine relative to and independent of the container basket. The invention further relates to a method for the internal spraying of containers, which are arranged upside down in container cells of a container basket of a container cleaning machine that moves in one direction, with a spraying medium by means of the spraying device, the method comprising: supplying the hollow shaft with the spraying medium by means of the supply device and moving the hollow shaft in the container cleaning machine relative to and independently of the container basket by means of the at least one servomotor.

Description

The present invention relates to a spraying device for spraying the inside of containers according to claim 1 and a method for spraying the inside of containers according to claim 11.

State of the art

DE 39 25 725 C1 discloses a nozzle arrangement for internal spraying of bottles with a nozzle body which closes an opening of a spray tube and has a bore, which nozzle body is rotated about an axis of rotation synchronously with the transport of the bottles.

Task

Based on the known prior art, the technical problem to be solved is to provide a spraying device for internal spraying of containers and a method for internal spraying of containers by means of the spraying device, which allow flexible use of the spraying device.

Solution

According to the invention, this object is achieved by the spray device according to claim 1 and the method according to claim 11 . Further embodiments and developments are covered in the dependent claims.

The spray device according to the invention for internal spraying of containers, which are arranged upside down in container cells of a container basket of a container cleaning machine moving in one direction, with a spray medium comprises a hollow shaft with at least one row of several spray nozzles along the hollow shaft, a supply device for supplying the hollow shaft with the spray medium and at least one servo motor for moving the hollow shaft in the container cleaning machine relative to and independent of the container basket.

“A row” can be a linear arrangement of several consecutive spray nozzles parallel to the longitudinal axis of the hollow shaft. Neighboring ones of the plurality of successive spray nozzles can all have the same distance from one another or the distances can be of different sizes.

There can also be more than one row of spray nozzles, for example two, three or more rows.

For example, four rows of spray nozzles can be provided. The rows can be offset by 90°.

The containers can, for example, be plastic containers, for example PET containers, for example reusable PET containers or bottles, for example glass containers, for example reusable glass containers or bottles.

By providing at least one servo motor for moving the hollow shaft in the container cleaning machine relative to and independently of the container basket, the internal spraying of the containers arranged upside down can be adapted to the given geometries of the containers. By moving the hollow shaft in the container cleaning machine relative to and independently of the container basket, the duration of the internal spraying can also be increased, since the movement of the hollow shaft with the spray nozzles can follow the containers.

The spraying device can also comprise one or more control devices for controlling the at least one servomotor.

It can be provided that the at least one servo motor includes a control device.

One of the at least one servomotor can be provided for rotating the hollow shaft about its longitudinal axis. By rotating the hollow shaft about its longitudinal axis, the row of multiple spray nozzles can cover a solid angle and spray medium can be discharged in this solid angle. Without turning the hollow shaft, the row of multiple spray nozzles could only spray medium in a smaller and fixed spatial angle. The hollow shaft can be rotated about its longitudinal axis in one direction or in the other.

So that this rotation can be carried out by the servo motor, which can be provided for rotating the hollow shaft about its longitudinal axis, the hollow shaft can be mounted in bearings on and/or in the spraying device. For example, the bearings can be provided on and/or in a tube which is provided for receiving the spray medium and which can be arranged parallel to the hollow shaft. The tube can include openings that can be arranged in such a way that spray nozzles of the hollow shaft can be arranged in alignment with it and can be supplied with the spray medium.

Alternatively or additionally, one of the at least one servomotor can move the hollow shaft linearly in and against the running direction be provided. If this one of the at least one servomotors is “alternatively” provided for linearly moving the hollow shaft in and against the direction of travel, it can be provided that the hollow shaft can only be moved linearly in and against the direction of travel by means of this servomotor. If this one of the at least one servomotors is “additionally” provided for the linear movement of the hollow shaft in and against the direction of travel, it can be provided that the hollow shaft can be rotated about its longitudinal axis by the one servomotor mentioned above and linearly by the servomotor mentioned here can be moved in and against the running direction by means of this servomotor. The turning around the longitudinal axis and the linear movement in and against the running direction can be carried out at the same time and/or at different times.

By linearly moving the hollow shaft in and against the running direction, the spray device can be moved synchronously and/or following and/or ahead of a container basket of a container cleaning machine moving in a running direction.

The spray device can be arranged on and/or on a movable structure in the container cleaning machine so that this linear movement can be carried out by the servo motor, which can be provided for linear movement of the hollow shaft in and against the running direction. For example, the movable structure can be provided in such a way that the movable structure can be provided below the containers, which are arranged upside down in container cells of a container basket of the container cleaning machine that moves in a direction of travel, and thus the linear movement of the hollow shaft in and against the direction of travel below this container can be done. The movable structure can be arranged on rollers or on slide rails.

The supply device can include a valve. An inflow of the spray medium can be controlled by means of the valve.

The supply device can include a tube for receiving the spray medium, which can be arranged parallel to the hollow shaft. The tube can include openings that can be arranged in such a way that spray nozzles of the hollow shaft can be arranged in alignment with it and can be supplied with the spray medium. If the hollow shaft is designed to be rotatable about its longitudinal axis, the multiple spray nozzles of the at least one row of multiple spray nozzles provided along the hollow shaft can be aligned in a first angular range of rotation with the openings of the Tube can be arranged, while in the remaining angular range (360° minus the first angular range), the multiple spray nozzles cannot be arranged in alignment with the openings, so that the spray nozzles cannot be supplied with spray medium in the remaining angular range and therefore cannot discharge any spray medium.

The spray nozzles can be designed as bores in the hollow shaft and two spray nozzles can be assigned to a bore.

The bores can be provided continuously in the hollow shaft and the walls of the hollow shaft. The two spray nozzles can correspond to or encompass the two ends of the bore, i.e. where the bore each pierces a wall of the hollow shaft.

The holes can be straight.

The hollow shaft for internal spraying of one of the containers in one of the container cells can each comprise four spray nozzles arranged offset by 90°.

The four spray nozzles can be arranged along a circumference of the hollow shaft. Or the four spray nozzles can be along two circumferences, which can have a distance of between 3 mm and 5 mm, for example.

A first pair of opposite spray nozzles of the four spray nozzles arranged offset by 90° can be assigned to a first bore in the hollow shaft and a second pair of opposite spray nozzles of the four spray nozzles arranged offset by 90° can be assigned to a second bore in the hollow shaft.

The spray nozzles of the first and the second pair of opposite spray nozzles can each be arranged offset by 180°. This can be achieved by a straight bore, which can be provided continuously in the hollow shaft and the walls of the hollow shaft. The spray nozzles of the first/second pair may correspond to or encompass both ends of the bore, i.e. where the bore pierces each wall of the hollow shaft.

The first hole and the second hole may be provided separately from each other, or the first hole and the second hole may be connected.

If the first and second bores are provided separately from one another, this can mean that they do not intersect and that therefore spray medium that passes through the first hole cannot get into the second hole.

When the first and second bores are connected, this can mean that they intersect and that therefore spray which passes through the first bore can also enter and pass through the second bore.

The bores can run perpendicularly to the longitudinal axis of the hollow shaft and intersect the longitudinal axis and/or the bores can enclose an angle of between 45° and less than 90° to the longitudinal axis and intersect the longitudinal axis.

It can also or alternatively be provided that the bores run perpendicular to the longitudinal axis of the hollow shaft and cannot intersect the longitudinal axis and/or that the bores enclose an angle of between 45° and less than 90° to a perpendicular to the longitudinal axis and do not intersect the longitudinal axis. The wells include the noted wells, the first and second wells.

The method according to the invention for the internal spraying of containers, which are arranged upside down in container cells of a container basket of a container cleaning machine moving in one direction, with a spraying medium by means of the spraying device as described above or below, comprises supplying the hollow shaft with the spraying medium by means of the supply device and a Moving the hollow shaft in the container cleaning machine relative to and independently of the container basket by means of the at least one servomotor.

Moving the hollow shaft can include rotating the hollow shaft about its longitudinal axis by means of one of the at least one servomotor and/or linearly moving the hollow shaft in and against the running direction by means of one of the at least one servomotor.

character list

• 1 eine schematische Schrägansicht von Spritzvorrichtungen zur Innenspritzung von Behältern in einer Behälterreinigungsmaschine,
• 2 eine seitliche Schnittansicht von Behältern während der Innenspritzung mit der Spritzvorrichtung,
• 3 eine seitliche Schnittansicht der Spritzvorrichtung,
• 4A, 4B,4C, 4D verschiedene Ausführungsformen von Bohrungen in der Hohlwelle und
• 5 eine seitliche Schnittansicht einer Behälterreinigungsmaschine.

The accompanying figures represent aspects and embodiments of the invention by way of example for better understanding and illustration. It shows:

• 1 a schematic oblique view of spray devices for internal spraying of containers in a container cleaning machine,
• 2 a side sectional view of containers during internal spraying with the spraying device,
• 3 a side sectional view of the spray device,
• 4A , 4B , 4C , 4D various embodiments of bores in the hollow shaft and
• 5 a side sectional view of a container cleaning machine.

Detailed description

In the figures described below, the same reference symbols designate the same parts. For clarity, like parts are described only when first encountered. However, it goes without saying that they can also be applied to the corresponding parts in the other figures with reference to variants and embodiments of a part described in the figures.

The 1 shows a schematic oblique view of spray devices 1 for internal spraying of containers 2 with a spray medium in a container cleaning machine. The containers 2 are arranged upside down in container cells 3 of a container basket 4 of the container cleaning machine that moves in a running direction 5 .

The spray devices 1 are arranged below the containers 2 . The spraying devices 1 each comprise a hollow shaft 6 with at least one row of several spray nozzles 7 (here, for example, six spray nozzles 7), which are arranged along the hollow shaft 6, ie parallel to the longitudinal axis 9 of the hollow shaft 6. Neighboring ones of the plurality of spray nozzles 7 following one another in the row are all at the same distance d from one another here.

To supply the hollow shaft 6 with the spray medium, a supply device 8 is provided, which is embodied here by way of example as a tube for receiving the spray medium. The supply device 8 is arranged parallel to the hollow shaft 6 in such a way that spray medium can be transferred from the supply device 8 to the hollow shaft 6 .

The spraying device 1 also includes a first servo motor (not shown) which can be provided for rotating the hollow shaft 6 about its longitudinal axis 9 in the first and the second direction of rotation 11 . So that the rotation can be carried out by the servomotor, the hollow shaft 6 is mounted in bearings 10 on the spraying device 1 . By rotating the hollow shaft 6 about its longitudinal axis 9, the row of several spray nozzles 7 can cover a solid angle and spray medium can be discharged in this solid angle (see also 3 ).

The spraying device 1 also includes a second servomotor (not shown) for linearly moving the hollow shaft 6 in a first and in a second direction 12, the first direction corresponding to the running direction 5 and the second direction running opposite to the running direction 5. The linear movement of the hollow shaft 6 can mean that the hollow shaft 6 is linearly moved together with the supply device 8 . By linearly moving the hollow shaft 6 in the first and second direction 12 , the spraying device 1 can be moved synchronously and/or following and/or ahead of the container basket 4 moving in the running direction 5 .

So that the linear movement can be carried out by the second servo motor, the spraying device 1 is arranged on a movable structure 13 in the container cleaning machine. By way of example, the moveable structure includes 13 slide rails.

The turning about the longitudinal axis 9 and the linear movement can be carried out at the same time and/or at different times. The spray device 1 and thus the hollow shaft 6 in the container cleaning machine can be moved relative to and independently of the container basket 4 by means of the first and second servo motors.

The 2 shows a side sectional view of containers 2 during internal spraying with the spraying device 1. The hollow shaft 6 has four rows of several spray nozzles 7, which are arranged along the hollow shaft 6, i.e. parallel to the longitudinal axis 9 of the hollow shaft 6. The four rows are offset by 90°. Spray medium 14 is arranged in the supply device 8 and can be discharged in a jet of spray medium 15 when a spray nozzle 7 is arranged in alignment with an opening 18 of the supply device 8 . The jet of spray medium 15 can reach the interior 19 of the container 2 through a mouth opening 16 of the container 2 and can be used for spraying the inner walls 17 of the container 2 on the inside. Depending on the rotational position of the hollow shaft 6 and the arrangement relative to the container 2, different parts of the inner walls 17 can be sprayed with different intensity and/or from different directions. In the 2 three different relative arrangements of the hollow shaft 6 to the container 2 are shown. On the left, the left-hand area of the inner side wall is increasingly sprayed, but part of the spray medium also reaches the inner bottom wall and runs down the right-hand area of the inner side wall and out of the container 2 . In the middle, the inner bottom wall is increasingly sprayed and part of the spray medium reaches the right and left inner side walls, runs down there and out of the container 2 . On the right, the right-hand area of the inner side wall is increasingly sprayed, but part of the spray medium also reaches the inner bottom wall and runs down the left-hand area of the inner side wall and out of the container 2 .

The 3 shows a side sectional view of the spray device 1. The hollow shaft 6 with the four rows of spray nozzles 7 can be seen more clearly here. A first pair of opposite spray nozzles 7 of the four spray nozzles 7 offset by 90° is assigned to a first bore 20 in the hollow shaft 6 and a second pair of opposite spray nozzles 7 of the four spray nozzles 7 offset by 90° is assigned to a second bore 21 assigned in the hollow shaft 6.

The first and second bores 20, 21 are designed as straight bores which are provided continuously in the hollow shaft 6 and walls of the hollow shaft 6. The spray nozzles of the first/second pair can correspond to the two ends of the bore 20, 21, i.e. where the bore 20, 21 pierces a wall of the hollow shaft 6, respectively, or comprise them. In the representation, the two bores 20, 21 have no contact with each other.

During the rotation of the hollow shaft 6 , a spray nozzle 7 can discharge spray medium in a solid angle range 23 .

The 4A , 4B , 4C show various embodiments and arrangements of bores in the hollow shaft.

The 4B shows the hollow shaft 6 with two bores 24, 26, in which a larger diameter is provided in the area of the spray nozzles 25, 27 than in the rest of the bores 24, 26. The cross section runs through the first bore 24, the second through the dashed representation Bore 26 is to be shown that the second bore 26 is arranged behind the first bore 24 in the viewing direction. The side view shows a cross section of the area of the first spray nozzle 25 of the first bore 24 in the wall of the hollow shaft 6. The course of the second bore 26 within the hollow shaft 6 is shown in broken lines. The two bores 24, 26 each run perpendicular to the longitudinal axis 9 of the hollow shaft 6.

The 4C shows the hollow shaft 6 with two bores 20, 28, which each have the same diameter throughout. The cross section runs through the first bore 20, the dashed representation of the second bore 28 being intended to show that the second bore 26 is arranged behind the first bore 20 in the viewing direction. The side view shows a cross section of the first bore 20 in the wall of the hollow shaft 6. The bore 20 runs perpendicular to the longitudinal axis 9 of the hollow shaft 6. The course of the second bore 28 within the hollow shaft 6 is shown in broken lines. The bore 28 encloses an angle 29 with a perpendicular to the longitudinal axis 9 of the hollow shaft 6, the angle being between 45° and less than 90°.

The 4D shows the hollow shaft 6 with connected bores 30 which intersect in the area of the longitudinal axis 9 of the hollow shaft 6 . The cross section runs through the two connected bores 30. The side view shows one of the two bores 30 in the wall of the hollow shaft 6. The course of the second bore 30 within the hollow shaft 6 is shown in broken lines. The two bores 30 each run perpendicularly to the longitudinal axis 9 of the hollow shaft 6. Both bores 30 have the same diameter throughout.

The 5 shows a side sectional view of a container cleaning machine 31 with two lye baths 33, 36. The container carriers with the containers arranged upside down therein are transported along a transport path 32 through the container cleaning machine 31; in the illustration, the transport direction runs from right to left. The containers move from a first lye bath 33 to an area in which a spray device 34 is provided for internal spraying of the containers arranged upside down. The spray medium is first liquor at a first temperature. Also provided in the area is an application device 35 for applying the second temperature to the exterior of the inverted containers of second liquor. The internal spraying and the impingement can take place at the same time or one after the other. As explained in more detail below, the first lye and the second lye are discharged from the first lye bath 33 by means of a discharge device 37 . The area with the spray device 34 and the loading device 35 is arranged above the second lye bath 36 , a deflector plate 41 being provided below the spraying device 34 and the loading device 35 and above a level of the lye in the second lye bath 36 .

The containers then enter a second lye bath 36 which is separate from the first lye bath 33 . After leaving the second lye bath 36, the containers can be moved out of the container cleaning machine 31 and fed to further process steps.

In the illustration, the first liquor used to spray the inside of the inverted containers is caught and collected in the first liquor bath 33 after the inside spray, and the second liquor used to spray the outside of the inverted containers after being sprayed in the first liquor bath 33. For this purpose, the deflector plate 41 is provided below the area in which the spraying device 34 and the application device 35 are provided, which carries the first lye used for the internal spraying of the containers arranged upside down after the internal spraying to the first lye bath 33 and the one for applying the outside of the upside down arranged container used second liquor passes to the first liquor bath 33 after exposure.

Lye can be drained from the first lye bath 33 by means of a drainage device 37 . The drained liquor is filtered in a filter device 38 . The filtered liquor is passed firstly through a heater 39 adapted to heat the liquor supplied to it and thereby obtain the first liquor at the first temperature and further to the spray device 34 and secondly through a cooler 40 adapted for cooling of the liquor supplied to it and for thereby obtaining the second liquor with the second temperature, and passed on to the loading device 35.

The first temperature can be between 58 °C and 90 °C, 80 °C and 90 °C or 83 °C and 87 °C, the second temperature can be between 58 °C and 70 °C or between 63 °C and 67 °C C, the temperature of the caustic baths 33, 36 can be between 70°C and 80°C, or this temperature can be 75°C, for example.

Apart from the temperature, the first and the second lye can be the same lye, for example the same type of lye.

A container cleaning machine can also comprise one or more than two lye baths, in which case the containers can be sprayed out and subjected to pressure on the transport route between the first and the second lye bath and/or between the following lye baths.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 3925725 C1 [0002]

Claims (12)

Spraying device (1) for internal spraying of containers (2), which are arranged upside down in container cells (3) of a container basket (4) of a container cleaning machine that moves in a direction (5), with a spraying medium (14), the spraying device (1) includes: a hollow shaft (6) with at least one row of several spray nozzles (7) along the hollow shaft (6); a supply device (8) for supplying the hollow shaft (6) with the spray medium (14); at least one servo motor for moving the hollow shaft (6) in the container cleaning machine relative to and independently of the container basket (4). The sprayer after claim 1 , wherein one of the at least one servomotor is provided for rotating the hollow shaft (6) about its longitudinal axis (9). The sprayer after claim 1 or 2 , wherein one of the at least one servomotor is provided for the linear movement of the hollow shaft (6) in and against the running direction (5). The spray device according to one of Claims 1 until 3 , wherein the supply device (8) comprises a valve. The spray device according to one of Claims 1 until 4 , wherein the supply device (8) comprises a tube for receiving the spray medium (14), which is arranged parallel to the hollow shaft (6), and wherein the tube comprises openings (18) which are arranged such that spray nozzles (7) of The hollow shaft (6) can be arranged in alignment with it and can be supplied with the spray medium (14). The spray device according to one of Claims 1 until 5 , wherein the spray nozzles (7) are designed as bores (20, 21,24, 26, 28) in the hollow shaft (6) and two spray nozzles (7) are assigned to a bore (20, 21,24, 26, 28). The spray device according to one of Claims 1 until 6 , wherein the hollow shaft (6) for internal spraying of one of the containers (2) in one of the container cells (3) comprises four spray nozzles (7) offset by 90°. The sprayer after claim 7 A first pair of opposite spray nozzles (7) of the four spray nozzles (7) offset by 90° is assigned to a first bore (20, 21,24, 26, 28) in the hollow shaft (6) and a second pair of each other opposite spray nozzles (7) of the four spray nozzles (7) offset by 90° is associated with a second bore (20, 21, 24, 26, 28) in the hollow shaft (6). The sprayer after claim 7 wherein the first bore (20, 21,24, 26, 28) and the second bore (20, 21,24, 26, 28) are provided separately from each other or wherein the first and second bore (30) are connected. The spray device according to one of Claims 6 until 9 , wherein the bores (20, 21, 24, 26) run perpendicular to the longitudinal axis (9) of the hollow shaft (6) and intersect the longitudinal axis (9) and/or wherein the bores (28) have an angle of between 45° and less than 90° to a perpendicular to the longitudinal axis (9) and intersect the longitudinal axis (9). Method for internal spraying of containers (2), which are arranged upside down in container cells (3) of a container basket (4) of a container cleaning machine moving in a running direction (5), with a spraying medium (14) by means of the spraying device (1) according to one of the Claims 1 until 10 , wherein the method comprises: supplying the hollow shaft (6) with the spray medium (14) by means of the supply device (8); Moving the hollow shaft (6) in the container cleaning machine relative to and independently of the container basket (4) by means of the at least one servomotor. The procedure after claim 11 , wherein the movement of the hollow shaft (6) comprises: rotating the hollow shaft (6) about its longitudinal axis (9) by means of one of the at least one servomotor and/or linearly moving the hollow shaft (6) in and against the running direction (5) by means of a the at least one servo motor.

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