WO2001072436A1 - Device and method for cleaning and sorting used paper containing cardboard and paperboard items - Google Patents

Abstract

The invention relates to a method for cleaning and sorting used paper containing cardboard and paperboard items, wherein it is possible to sort used paper occurring in a circular flow and to ensure that only a small amount of paperboard or cardboard remains once said used paper has been sorted. According to the invention, several axes (1) are used. Said axes are arranged parallel to each other and orthogonally with respect to the direction of conveyance of the used paper which is to be sorted. Oscillating levers (2) which are oriented in a parallel position with respect to the direction of conveyance are secured to said axes. At the end of the conveyance path, the paperboard or cardboard can be removed

Description

Device and method for cleaning and sorting cardboard and waste paper containing cardboard

The invention relates to a device and a method both for cleaning and for sorting cardboard and waste paper containing cardboard, as is normally obtained in the circular economy. When recycling, it is necessary to separate the waste paper, cardboard and cardboard.

This separation takes place in the various recycling companies on the one hand purely manually with a high expenditure of time and correspondingly difficult unfavorable working conditions.

In the recent past, attempts have been made to use machines in order not only to separate the contaminants but also to sort them into the paper and cardboard components.

Such sorting devices work mechanically, for example using screens or else

Sieves that are moved using a variety of mechanics. With the known machines, however, cardboard and cardboard boxes with a proportion below 50% can be sorted out and consequently a complex additional manual separation is still required.

It is therefore an object of the invention to propose an apparatus and a method with which a sorting of waste paper containing cardboard and cardboard can be achieved, only a small residual proportion of cardboard or cardboard being contained in the waste paper.

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each has a correspondingly adjacent axis.

The rocker arms can be designed in the shape of a bow, and they can be used as plate-shaped elements.

But it is also possible to use a conventional metal profile, e.g. to bend a round material or a pipe accordingly, so that a closed train is obtained. It is not absolutely necessary to connect the ends of the correspondingly curved profile to one another. The stability can be ensured by fastening the axle. The axes to which the rocker arms are attached can be in relation to the longitudinal axis of the

Seen rocker arm, both centrally, but also arranged off-center, so that in the latter case different strokes can be achieved at the front and rear ends of the rocker arms.

There are various options for drives that can achieve the desired pivoting movement of the rocker arms.

Additional eccentric or camshafts that are aligned parallel to the axes can be used, on which part of the rocker arms rests and the rocker arms can be pivoted by the corresponding rotation of the eccentric or camshafts.

The eccentric or camshafts can then be driven by means of a single, preferably speed-controllable electric motor via chains or toothed belts. With the use of a single electric motor, the desired synchronism of movement of the rocker arms attached to the different axes can be ensured very easily.

Another alternative for driving the rocker arms is the use of a crank mechanism with push rods, such a crank mechanism advantageously having at least one flywheel with which changes in load during transport and sorting of the waste paper can be compensated.

It can also be expedient to design or set up the device in such a way that the plane formed by the axes aligned parallel to one another and to which the rocker arms are attached is inclined with respect to the horizontal.

With such an inclination of this plane, the transport speed can either be accelerated or slowed down, so that, for example, the length of the device can be reduced if the transport speed of the waste paper is slowed down.

To reduce the noise level and to avoid contamination in the vicinity of the device according to the invention, a tunnel-shaped housing can be used, into which the unsorted waste paper can be introduced on one side through an opening and the sorted cardboard can be removed on the other side. In addition to sound insulation, an extraction system can also be installed on the housing, in which a filter for particles and suspended matter can optionally be integrated. The maximum stroke of the pivoting movement at at least one of the ends of the rocking levers should be set in the range from 50 to 150 mm, preferably to approximately 100 mm.

The frequency of the swiveling movement should be set in the range from 50 to 150 min ^"1 , preferably to approx. 100 min ^{" 1} , but at least the frequency can be varied within limits by influencing the speed of the electric motor.

The invention will be explained in more detail below on the basis of exemplary embodiments.

Show:

Figure 1 is a plan view of a device according to the invention;

FIG. 2 shows a side view of an example of a device according to the invention;

FIG. 3 shows a section through an example of a device according to the invention;

Figure 4 shows an example of a rocker arm and

FIG. 5 shows a transmission plan for a crank-push rod transmission that can be used on a device according to the invention.

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can, the unsorted waste paper can be fed into the device.

In addition, it becomes clear how the rocker arms 2 fastened to axles 1, which are arranged adjacent to one another, are pivoted back and forth in the opposite direction in the up and down direction, an almost identical pivot angle being maintained in any case.

In the inlet area, a conveyor belt 3 is arranged here, orthogonal to the transport direction of the waste paper to be sorted, onto which the separated impurities fall and can then be transported away accordingly.

In the subsequent area, a second conveyor belt 3 'is arranged accordingly, with which falling, separated waste paper can be fed for further recycling. At the outlet A, separated cardboard or cardboard boxes can be removed using a slide.

The sectional view according to FIG. 3 again shows the offset, intermeshing arrangement of rocking levers 2 on adjacent axes 1 and the fastening of the axes 1 in a frame construction, as well as the direction of transport of the conveyor belt 3 'for separated waste paper.

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Claims

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Device according to claim 1 or 2, characterized in that the axes (1) are arranged centrally with respect to the longitudinal axis on the rocker arms (2). 4. The device according to claim 1 or 2, characterized in that the axes (1) are arranged eccentrically with respect to the longitudinal axis on the rocker arms (2). 5. Device according to one of claims 1 to 4, characterized in that the rocker arm (2) are formed from curved profile material. 6. Device according to one of claims 1 to 5, characterized in that the rocker arms (2) are fixedly connected to the axes (1) and the pivoting movement of the rocker arms (2) by means of additional eccentric or camshafts which are parallel to the axes ( 1) are rotatably mounted in the frame structure, is accessible. 7. Device according to one of claims 1 to 5, characterized in that the rocker arms (2) are fixedly connected to the axes (1) and the pivoting movement of the rocker arms (2) by means of push rods (5, 12) acting on the axes (1) , 12 ', 13, 14, 15), which are part of a crank mechanism, can be reached. Device according to claim 7, characterized _^ in that at least one flywheel (6) is part of the crank gear. 9. Device according to one of claims 1 to 8, characterized in that the distances between the rocker arms (2) arranged on the respective axes (1) increase in the transport direction and the number of rocker arms (2) present on one shaft (1) reduced accordingly. 10. Device according to one of claims 1 to 9, characterized in that the plane formed by the axes (1) aligned parallel to one another is inclined with respect to the horizontal. 11. The device according to one of claims 1 to 10, characterized in that the frame structure with axes (1), rocker arms (2) and collecting containers or transport devices (3, 3 ') are arranged in a housing which is connected to an extraction system with a filter is. 12. Device according to one of claims 1 to 11, characterized in that the crank mechanism is driven by a speed-controllable electric motor (4). 13. Device according to one of claims 1 to 11, characterized in that the eccentric or camshafts are driven by means of a chain or toothed belt and a speed-controllable electric motor (4). 14. Process for cleaning and sorting cardboard and cardboard containing waste paper, in which several in a frame construction parallel to each other and orthogonal to the transport direction tion held axes (1), on each of which rocker arms (2) aligned parallel to the transport direction are fastened and with the axles (1) or the rocker arms (2) engaging drive elements (4), which an alternating opposite swiveling movement adjacent Rows of rocking levers (2) with a predeterminable stroke (H) cause unsorted waste paper to be transported through the device and small impurities as well as in Direction of transport downstream waste paper falls into or onto collecting containers or transport devices (3, 3 ') arranged below the rocker arm -axle structure and separated cardboard or cardboard boxes are collected or removed separately. 15. The method according to claim 14, characterized in that a stroke (H) of 50 to 150 mm is set for the pivoting movement of the oscillating arm (2). 16. The method according to claim 14 or 15, that the pivoting movement is set at a frequency in the range between 50 to 150 min ^"1 . 17. The method according to any one of claims 14 to 16, characterized in that cardboard, cardboard and / or waste paper by adjusting the stroke (H) and the frequency of the pivoting movement of the Swing levers (2) are to be held together at least _ in the infeed area.