DE102010005338A1 - Machine for selecting cardboard portions from waste paper mixture during recycling process in paper mill to manufacture newsprint, has pickup device with prickers penetrating through gaps, where device is arranged below back pressure device - Google Patents

Abstract

The machine (1) has a pickup device (4) with freely projecting prickers (42), and a back pressure device (2) cooperating with the pickup device, where the back pressure device has support regions (22) and gaps lying between the support regions. The prickers of the pickup device penetrate through the gaps by skewering cardboard portions of a paper mixture, where the pickup device is arranged below the back pressure device. The pickup device and/or the back pressure device are formed as rotatable rollers. An independent claim is also included for a plant comprising a feeding device for supplying paper mixture to a machine for selecting cardboard portions from the paper mixture.

Description

The present invention relates to a machine for rejecting Pappanteilen from a papermaking, especially a waste paper mixture. Such machines are known from the prior art and serve to upgrade in a recycling process, the collected paper to be recycled by separating different proportions. This paper usually has after a coarse sorting a mixture consisting of more unstable paper shares and stiffer Pappanteilen. For example, the cardboard stocks are supplied to paper mills by recycling companies, who in turn use the paper shares for the production of newsprint.

From the EP 1 291 092 B1 Such a machine for rejecting the Pappanteile from a waste paper mixture is known. In this case, a conveyor is provided, which promotes the paper lying flat and also a pick-up device which has spikes, which in turn engage in intermediate spaces of the former conveyor. These spines are used to pick up the stiffer pieces of cardboard that are pierced by the spikes. Furthermore, a stripping device is provided, which in turn strips off the paper from the pick-up device. However, it has been found that in particular by the provision of a flat conveyor device, which in the EP 1 291 092 B1 designed as a conveyor belt, the space required for such systems increases significantly. Furthermore, the embodiment of a transverse to the conveying direction interrupted conveyor belt with corresponding tensioners is relatively expensive.

In the hitherto unpublished German Patent Application No. 10 2008 034 803.1 a sorting plant has been described, which has two rolls, wherein on one roll spikes are formed and on the second roll recesses, in which engage the spines respectively. These recesses are adapted to the spines, which means that the two rollers must be synchronized with each other. The object of German Patent Application No. 10 2008 034 803.1 is hereby incorporated by reference in its entirety into the subject of the present application.

It has been found, however, that it is sometimes desirable for the rolls to have a different arrangement within a sorter, especially when the spiked roll is traveling at a different, for example, higher speed than the roll having the recesses. The described systems also have the disadvantage that a separation of the shares is particularly difficult if more labile paper shares lie on the cardboard parts, which are then pierced by the spines of both drives so that it can not come to a separation of the shares.

The present invention is therefore based on the object of making the known from the prior art devices in terms of separating the Pappanteile from a waste paper mixture more efficient and possibly more cost-effective. This is achieved by the subject matters of the independent claims. Advantageous embodiments and further developments are the subject of the dependent claims.

A machine according to the invention for rejecting the paper stocks from a paper stock having more unstable paper portions and stiffer pieces of paper comprises a picker device which is studded with freely projecting spines and a counterpressure device which cooperates with the picker device, the backpressure device providing support areas and between these support areas has lying free spaces through which the spikes of the pick-up device penetrate while impaling the Pappanteile, wherein the pick-up device is arranged below the counter-pressure device. Furthermore, the pick-up device and the counter-pressure device advantageously have axes of rotation, which are preferably arranged one below the other. Thus, a more efficient sorting is ensured, since the usually underlying (because heavier) Pappanteile be more easily absorbed by the opposite of the counter-pressure device receiving device.

On the other hand, the paper portions lying above the paperboard parts are pressed into the counterpressure device.

Preferably, the counter-pressure device and the pickup device are each designed as rotatable rollers and a control device advantageously controls the counter-pressure device and pick-up device or their movements such that they have different peripheral speeds. However, it would also be possible that the receiving device is configured as a spiked band.

Preferably, the pick-up device and the counter-pressure device on rotational axes, which are substantially and preferably arranged directly below each other.

In contrast to the prior art is therefore proposed here that the paper mixture is not conveyed lying flat but is passed between said rollers and during this procedure is disconnected. The spikes can pierce through from below through the harder Pappanteile, but press the more labile shares in the counter-pressure device, more precisely, the free spaces of the counter-pressure device formed between the support areas. This means that the harder Pappanteile be taken from the upwardly aligned spines, while the more labile shares remain on the counter-pressure device and can be performed. The said free spaces are therefore above the support range of the counter-pressure device.

In particular, it has been found that the comparatively short period of interaction between the rollers is sufficient to satisfactorily separate the paper and board portions.

Advantageously, the spikes of the pick-up device dip independently of a rotational position of the counter-pressure device or regardless of the relative rotational position of the pick-up device with respect to the counter-pressure device in the free spaces of the counter-pressure device. For this reason, a synchronization of the respective rotational movements is not required. Preferably, therefore, the free spaces are fully formed in the circumferential direction of the counter-pressure device, such as circumferential grooves between the support areas.

Preferably, the counter-pressure device and the pick-up device or their movements are independently controllable.

In a further advantageous embodiment, the control device controls the counter-pressure device and the pick-up device such that the peripheral speed of the pick-up device is higher than the peripheral speed of the counter-pressure device. In this way, the separation of the paper and paper shares can be made easier because deliberately the Pappanteile be shifted from the more unstable Papieranteilen and therefore occasional liability between the two shares are overcome. This embodiment has proven to be particularly advantageous to separate the paper and Pappanteile even more targeted from each other.

In a further advantageous embodiment, the spikes of the pick-up device emerge independently of a rotational position of the counter-pressure device into the free spaces of the counter-pressure device. In other words, the free spaces of the roller are preferably designed circumferentially in their circumferential direction. For this reason, no synchronization between the pickup device and the counter-pressure device is necessary because a collision between the spikes and the roller of the counter-pressure device is avoided. Advantageously, the free spaces into which the spikes dive, in the direction of the axis of rotation of the roller at most three times as wide as the width of the respective Stachen, preferably only a maximum of 2 times as wide. In this way, the free spaces are kept relatively narrow to improve the skewering.

Advantageously, however, second free spaces are still provided, in which no spikes dive and which are also executed between the support areas. These free spaces are advantageously wider than the free spaces into which the spines intervene. In the process, the free spaces, in which spikes intervene and those open spaces in which no spines intervene, alternate. Between these larger open spaces, the amount of paper can bend, which causes a loosening of the material.

In a further advantageous embodiment, the support areas of the overhead counter-pressure device have a sawtooth-like profile on their outer circumference. By this sawtooth profile, the entrainment of paper shares can be improved by the counter-pressure device. More specifically, the counter-pressure device has a cylindrical base body, are formed on the annular walls protruding in the radial direction and on the outer periphery of these walls turn the sawtooth-like profile. Between these walls, as stated above, the free spaces are provided, in which dive the spines. A entrainment of Pappanteile by the counter-pressure device does not take place here.

Advantageously, the spikes are movable relative to the main body of the pickup device. In this way, it is possible that the spines recede at all too high loads, for example, when a phone book or similar thick material to be pierced. In the cited prior art of EP 1201092 B1 Such a retraction of the spines is not necessary because there the spines are arranged on a band and in this way under load automatically retraction of the spines is possible.

In a further advantageous embodiment, the device has a stripping device for stripping the Pappanteile of the spines. This stripping device is preferably at least partially and particularly preferably arranged completely below the pick-up device, and preferably far away from the counter-pressure device. Preferably, the stripping device is also at least partially and preferred completely disposed below the counter-pressure device

For example, the counter-pressure device has a first drive device for driving and the pick-up device has a second drive device for driving and the two drive devices can be controlled independently of one another. Advantageously, the drive devices are each electric motors or servomotors, which are controlled in particular by converters.

The present invention is further directed to an installation with a machine of the type described above, wherein the system has a feed device which feeds the paper mixture to the machine and wherein preferably the transport speed of this feed device differs from the conveying speed of the counter-pressure device. Advantageously, the transport speed of the feeding device is controllable independently of the conveying speed of the counter-pressure device. Thus, the feed device and the counter-pressure device are preferably not synchronized with each other.

For example, the feeder promotes the paper crowd slower than the counter-pressure device. In this way, an equalization of the paper batch can be made. Advantageously, the feeder is a conveyor belt.

This conveyor belt ends advantageously in an area between the two rollers such that paper mixture transported by the counter-pressure device reaches the counter-pressure device. In particular in this area but also on the roll, the amount of paper is advantageously conveyed not lying flat, since by the correspondingly occurring bends of the material further equalization in the paper mix can occur or adhering areas can be solved from each other.

The installation preferably has a presorting station which is arranged in front of the machine in the transport direction of the paper batch and which performs a sorting of the paper batch such that the board portions of the batch are below the paper portions with a higher statistical probability than the paper portions below the board portions. Thus, the Pappanteile can be easily absorbed and removed with the arranged on the lower receiving device spines.

The present invention is further directed to a sorting unit for pre-sorting the paper batch and randomly arranging the paper batch, respectively. In this case, this front station on a first transport device, which conveys the amount of paper and a second conveyor, which promotes the papermaking. According to the invention between the first conveyor 62 and this second conveyor 52 an area is provided in which the paper crowd falls freely.

This free fall causes a statistical redistribution of the paper mixture, wherein the Pappanteile have a lower air resistance than the more unstable paper shares and thus statistically lower on the second conveyor below.

In this way, this device achieves a redistribution of the geometric arrangement of the paper and Pappanteile.

This presorting device is particularly suitable in conjunction with the sorting system described above.

Advantageously, the height differences over which the paper crowd falls in free fall between 20 centimeters and three meters, preferably between 40 centimeters and two meters, and more preferably between 40 centimeters and one meter.

Advantageously, the first conveyor d. H. the higher-lying transport device designed such that the paper mixture does not leave this lying flat but tilts down from this whereby the statistical redistribution of the paper mixture is still promoted.

Further advantages and embodiments will be apparent from the attached drawings:
Show:

1 A schematic side view of a generic machine;

2 a representation of a region between the two rollers;

3 a rough schematic representation of a plant;

4 another view illustrating the intermediate region between the two rollers; and

5 a schematic representation of a machine according to the invention with bottom receiving device.

1 shows a schematic side view of a machine according to the invention. Here is a conveyor or transport device 2 provided, which here, as indicated by the arrow P1, rotates counterclockwise about the axis X. This counter-pressure device 2 is designed as a roller. The material or the paper mixture is fed along the arrow P2. Advantageously, the material is supplied from a curved path so that optionally adhering to each other materials can be loosened. As part of the in 1 - 4 As shown, the counter-pressure device can also be referred to as a conveyor.

The reference number 4 indicates a pick-up device, which the hard components of the paper batch with the help of spikes 42 receives. These spines 42 are on an outer periphery of the pickup device 4 arranged. It can be seen that the spines do not extend in a radial direction but slightly oblique to this radial direction. Advantageously, an angle of this inclination between 2 ° and 20 ° is advantageously between 5 ° and 15 °.

More specifically, the spines are opposite to the radial direction in the transport direction of the paper batch and in the direction of rotation of the pickup device, respectively 24 inclined. The reference character k denotes the circular path along which the tips of the spikes 42 move.

The pick-up device rotates about an axis Y, wherein in operation this pick-up device 4 Turns faster than the back pressure device 2 , The single spines 42 are doing in guide bushes 48 arranged so that they are movable in their respective extension direction E. In this way, it is possible that the spines yield when occurring high loads and move inward. Due to the inclination of the individual spines, the entrainment of Pappanteile can be improved.

It also recognizes a sawtooth-like structure 29 , respectively, on the outer perimeter of the support areas 22 is arranged. Also, the sawtooth structure improves the entrainment of the paper mixture.

The reference number 20 Means a control device for controlling the drive means (not shown), which the two rollers 2 . 4 drive.

2 shows a more detailed view of the area between the pickup device 4 and the counter-pressure device 2 , You can see here again the open spaces 24 , each between the support areas 22 are arranged. Furthermore, there are even larger open spaces 25 provided, which also the support areas 22 separate in the width direction. Therefore, in this embodiment, the support areas in the width direction B are proportionally much smaller than the respective clearances. In this way, the material is not supported lying flat in the width direction B but the design allows the material in many areas on the body 26 the roller moved. In this way, adhesion effects within the paper batch can be resolved. The material is thus slightly wavy promoted and the spines each engage in the smaller open spaces 24 one.

3 shows a representation of a system according to the invention 50 , In addition to the counterpressure device already described above 2 and the cradle 4 here is still a stripping device 8th represented, which of the spines 42 strips off skewered material. This stripped material can be placed on a discharge conveyor 14 spent and transported away. Furthermore, a feeder 52 representing the paper mix of the device 1 supplies. This feeding device is a conveyor belt which transports the mixture along the arrow P1.

In a region A, the amount of paper becomes from the feeder 52 on the back pressure device 2 spent. It can be seen that in this region A, the material is curved at least in sections so that a loosening of the material can occur in this area. Furthermore, it would also be possible for the conveyor belt 52 inclined, for example, the amount of paper promotes obliquely upward. Even a promotion obliquely down would be conceivable. Instead of the conveyor belt 52 Other feeding devices could also be provided, such as slides or the like.

4 shows a further schematic representation of the interaction between the counter-pressure device 2 and the pickup device 4 , One recognizes here again the support areas 22 and those between the support areas 22 arranged free spaces 24 , Advantageously, the two axes of rotation of the rollers are arranged parallel to one another and preferably also substantially exactly one above the other.

At the in 5 Shown embodiment, the receiving device according to the invention 4 , which with the spines 42 is occupied below the counter-pressure device 2 arranged. The specific embodiment of the counter-pressure device and the cradle 4 corresponds to the above with respect to the 1 - 4 described embodiments. Here are the axes of rotation of the recording device 4 and the counter-pressure device 2 arranged vertically with each other and also parallel to each other. The outer circumference of the pickup device measured at the tips of the respective spines 42 is slightly larger than the outer circumference of the back pressure device measured at the outer periphery of the support areas 22 ,

The reference number 8th Also here again denotes a scraper, which the Pappanteile of the spines 42 strips off to the pick-up device. In the embodiment shown here, however, this stripping device is arranged below the pick-up device. The reference number 32 refers to a further conveyor such as a conveyor belt, which removes the Pappanteile. Here, the Pappanteile be transported away in a direction perpendicular to the plane of the figure and thus perpendicular to the transport direction on the conveyor belt 52 stands. The reference number 34 identifies another conveyor belt, which removes the paper shares. These paper shares are first in the counter-pressure device 2 then pressed in, slide out of this and fall down onto the conveyor 34 , The two conveyors 32 and 34 are here below the pickup device 4 arranged.

The reference number 36 refers to a separator which ensures that the paper portions on the conveyor belt 34 and do not accidentally hit the conveyor belt 32 ,

The reference number 12 denotes a drive motor for driving the counter-pressure device and the reference numeral 16 a drive motor for driving the pickup device. In addition, it would also be possible for the two axes of rotation of the two rolls to be offset laterally relative to one another, wherein, however, the axis of rotation of the receiving device is below the axis of rotation of the counterpressure roller or counterpressure device, as mentioned above. Therefore, the pickup device 4 and the back pressure device 2 independently drivable, for example, with different speeds or velocities, which are not a constant relationship to each other.

The reference number 54 refers to a drive device for driving the conveyor belt 52 , Instead of the conveyor belt shown here, it would also be possible to provide a plurality of rollers lying one behind the other, which convey the paper mixture. This would have the additional advantage that a further loosening of the paper mixture is made by these then no longer flat lying but somewhat jolting transport.

Between the conveyor belt 52 and the pickup device 4 is a gap 55 provided, which acts here as a stone trap. Stones and smaller objects such as pieces of wood can fall through this gap and thus do not reach the receiver device 4 , Advantageously, the batch of paper arrives in a flying manner from the end of the conveyor belt to the picking device.

The reference number 60 indicates in its entirety a presorting device. This pre-sorting device here has a rotating carrier 62 on, which is cone-shaped, and on the paper mixture from a feed device 72 is encouraged. Due to the effect of the centrifugal force, the paper mixture is forced outwards and passes over a region Be, in which it is in free fall on the conveyor 52 , In the area of this free fall, the cardboard is caused to fall down faster than the lighter paper and thus on the conveyor 52 statistically with greater frequency the cardboard comes to rest under the paper. It should be noted that the paper mix is not supplied in a continuous stream, but in a margin. Therefore, it also falls marginally through the case area Be and arrives in this way pre-sorted to the pick-up device 8th , This procedure is particularly advantageous in conjunction with the underlying pick-up device. Since now more predominantly the heavier Pappanteile down, they can easily from the spines 42 can be pierced and a separation of the paper and Pappanteile can be done more efficiently.

Furthermore, it is also advantageous that the stripping device 8th below the pick-up device 4 is arranged. So it sometimes happens that the Pappanteile are damp. While in the prior art, the stripping device is above it is often difficult in these cases, especially with wet Pappanteilen to deduct this from the spines. If like here, the scraper 8th is arranged below the pickup device, also affects the gravity of the wet Pappanteile for their separation from making them easier on the conveyor belt 32 reach. When receiving the cardboard by the pick-up device, gravity additionally causes the cardboard to not prematurely release from the pick-up device.

However, the stripping device can in 5 also be located further to the left ie not directly below the axis of rotation of the pickup device but offset to the left to this.

The presorting station 60 preferably has a fall area 8th in which the paper batch falls in essentially free fall. In particular, it falls on the feeder 52 to be sorted. However, it would also be possible for the amount of paper to fall directly on the pick-up device.

Furthermore, the presorting station preferably has a rotatable carrier.

Preferably, the feeder promotes the paper mate slower than the counter-pressure device. In this way, an equalization of the batch takes place, wherein the feeder acts as a conveyor belt.

This interaction of the presorting station becomes advantageous 60 and the subsequent sorting system 1 used. This presorting station 60 causes, as mentioned above, that the Pappanteile statistically more frequently among the lighter paper shares than the paper shares among Pappanteilen. Now the spines 42 approaching from the bottom in this way, predominantly the underlying Pappanteile pierced where, however, the lighter paper components in the counter-pressure device 2 be pressed. In this way, the efficiency of the sorting station 1 elevated.

All disclosed in the application documents features are claimed as essential to the invention, provided they are new individually or in combination over the prior art.

LIST OF REFERENCE NUMBERS

2

Counterpressure device / rotatable roller

4

Pick-up device / rotatable roller

8th

stripping

14

Discharge Conveyor

20

control device

22

support areas

24

Free rooms

25

bigger open spaces

26

body

24

Free rooms

29

sawtooth-like structure

32, 34

conveyor belt

36

separator

42

spur

48

guide bushings

50

investment

52

Feeder / conveyor belt

55

gap

60

Vorsortierstation

62

carrier

72

feeding

P1, P2

arrow

X, Y

axis of rotation

A

Area

B

width direction

Be

Fallb

k

circular path

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• EP 1291092 B1 [0002, 0002]
• DE 102008034803 [0003, 0003]
• EP 1201092 B1 [0018]

Claims (10)

Machine ( 1 ) for ejecting the paper stocks from a batch of paper having more labile paper portions and stiffer pieces of cardboard, the apparatus comprising a pick-up device (US Pat. 4 ) having freely projecting spines ( 42 ), and a counterpressure device ( 2 ) connected to the pickup device ( 4 ), the counterpressure device ( 2 ) Support areas ( 22 ) and between these areas of support ( 22 ) open spaces ( 24 ) through which the spines ( 42 ) of the pickup device ( 4 ) penetrate while impaling the Pappanteile, characterized in that the Aufnehmervorrichtung ( 4 ) below the counterpressure device ( 2 ) is arranged. Machine ( 1 ) according to claim 1, characterized in that the pick-up device ( 4 ) and / or the counterpressure device ( 2 ) as a rotatable roller ( 4 ) is executed. Machine ( 1 ) according to at least one of the preceding claims, characterized in that the spines ( 42 ) of the pickup device ( 4 ) independent of a rotational position of the counter-pressure device ( 2 ) into the open spaces ( 24 ) of the counterpressure device ( 2 ) immerse. Machine ( 1 ) according to at least one of the preceding claims, characterized in that the device comprises a stripping device ( 8th ) for stripping the cardboard parts from the spines ( 42 ) having. Investment ( 50 ) with a machine ( 1 ) according to at least one of the preceding claims and with a feed device ( 52 ), which of the machine ( 1 ) feeds the paper mixture, wherein a transport speed of this feeding device ( 52 ) preferably from the conveying speed of the picking device ( 2 ) is different. Investment ( 50 ) according to claim 5, characterized in that the plant a Vorsortierstation ( 60 ), which in the transport direction of the paper batch in front of the machine ( 1 ) and which performs a sorting of the paper batch in such a way that the board portions of the batch are below the paper shares with a higher statistical probability than the paper shares below the board portions. Investment ( 50 ) according to claim 6, characterized in that the presorting station ( 60 ) has a drop zone in which the paper mash falls in substantially free fall. Investment ( 50 ) according to claim 6, characterized in that the presorting station ( 60 ) has a rotatable support. Investment ( 50 ) according to claim 6, characterized in that the feeding device ( 52 ) conveys the amount of paper more slowly than the counterpressure device ( 2 ) Presorting station ( 60 ) for pre-sorting a paper batch having more labile portions of paper and stiffer pieces of cardboard, the apparatus ( 60 ) a first transport device ( 62 ) conveying the paper mixture and a second transport device ( 52 ) conveying the paper mixture, the second transport device ( 52 ) in the transport direction of the paper batch after the first transport device ( 62 ), characterized in that between the first transport device ( 62 ) and the second transport device ( 64 ) an area (B) is provided, in which the amount of paper in substantially free fall on the second transport device ( 52 ) falls.

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