DE29721670U1 - Arrangement for crushing bodies made of rigid or structural foam - Google Patents

Description

•#

MM-Styro Recycling GmbH
in Radfeld (Austria)

^: l Arrangement for crushing bodies made of hard or

ki structural foam

The invention relates to a device according to the preamble of claim 1. Such an arrangement is particularly suitable for the shredding of rigid foams and similar materials with a lower density, in particular polystyrene. Such materials form, among other things, a wide variety of packaging materials in unmanageable quantities because they are lightweight and at the same time have high shock absorption. After use, they are produced as bulky, high-volume and valuable waste, although mostly contaminated or mixed with foreign bodies, and this is on an increasing, hardly manageable scale. The same applies to such materials, which are used particularly with regard to environmentally relevant heat and energy savings for insulation in the household appliance sector, in building services, in plant construction and to a high and still increasing extent in civil and structural engineering. Large quantities of such prefabricated molded bodies are used, in particular panels of various dimensions, thickness, density, water, chemical and microorganism resistance, strength, texture and structure. Such materials that accrue as waste or for disposal can be contaminated by, for example, stones, nails, adhering concrete and mortar residues, metal parts or the like.

A disadvantage that causes disposal problems when using these materials is that during their installation, i.e. on a construction site, in a factory, etc., large quantities of relatively clean, but often particularly "bulky" rigid foam waste are produced, the volume of which is correspondingly high, as a result of cutting, shape adjustment, etc., even without any use or modification of the materials.

It is therefore a major concern of consumers, commercial users and industry, and in particular of companies and authorities responsible for or involved in waste disposal and the environment, to avoid transporting high-volume waste of this type and to avoid dumping these large volumes in landfills. To this end, it is essential to ensure that the volume of waste is reduced significantly and that these "compacted" quantities are recycled and reused in an economically viable and ecologically sensible way. The type of conditioning and processing of the waste bodies produced is particularly important for recycling and reuse.

The aim of the invention is to achieve a rapid volume reduction of structural foams or materials with a similar consistency by crushing them

largely without the usual interruptions to operations as a result of build-up, blockage, associated heat build-up, disruptions due to the introduction or presence of foreign materials, etc. These processed, shredded foams should be able to be further processed or reprocessed, for which freedom from foreign bodies, the achievement of certain grain size ranges and distributions and certain conditions during shredding must be observed.

This aim is achieved according to the invention in an arrangement of the type mentioned at the outset with the features stated in the characterising part of claim 1.

By connecting a fine shredding unit, the shredding can be controlled in two separate shredding devices connected in series, whereby pre-shredding to a predetermined grain size is advantageously carried out in the first shredding device and subsequent shredding is carried out in the fine shredding device, whereby the grain size distribution achieved can be evened out and standardized. Furthermore, the shredding device can be constructed as a robust unit that is not easily damaged by foreign bodies adhering to the bodies to be shredded, e.g. stones, metal, etc.; in the event of damage, the shredding tool of the shredding device can be easily replaced. The fine shredding device is advantageously formed by a high-speed shredding wheel, which ensures uniform shredding of the pre-shredded particles without tearing them; In particular, polystyrene is broken down into individual cells or cellular particles without tearing them up too much. This method of crushing is advantageous for further use of the crushed particles.

Furthermore, through a common control or control unit of the shredding device and the fine shredding device, the throughput through the arrangement can be uniform and controlled, and overloading of the fine shredding unit can be avoided. This is the case if the speed of the transport unit supplying the shredding device can be regulated by the control unit. In particular, the features of claims 19, 20, 27 and 28 are also advantageous for achieving these goals.

The type and design of the shredding device used can vary. The shredding device designed according to the invention is extremely robust and suitable for large throughput quantities.

The impeller of the fine shredding unit should in particular rotate quickly and if the procedure is advantageously carried out in accordance with the features of claim 3, a rapid and uniform shredding of the pre-shredded particles takes place as they pass the impeller.

It is particularly simple in terms of construction if the features of claim 4 are implemented in an arrangement according to the invention. With this blower, the pre-shredded particles can be sucked from the shredding device to the fine shredding unit and the finely shredded particles can be moved further with the appropriate conveying pressure in the pipe conveyor device to the filling station. Such an arrangement is particularly simple in terms of construction and design if the fine shredding unit and the blower are combined to form a single unit and if necessary the features of claim 5 are implemented. If the procedure according to claim 7 is followed, the advantage arises that the highest suction pressure prevails directly in the area of the fine shredding device, so that the sucked-in particles can be quickly passed through there and that the highest conveying pressure also prevails immediately after the fine shredding device, so that the finely shredded particles are quickly transported away. The efficiency of the fine grinding device is increased with structural simplicity if the features of claim 24 are advantageously fulfilled.

The type and design of the blower used can vary. The coupling of the blower and the fine shredding unit is particularly advantageous. The blower could be installed upstream of the fine shredding unit.

For sound insulation and to avoid air turbulence in the pipes of the conveyor unit, it is advantageous to proceed as claimed in claim 8.

A robust and simply constructed shredding unit is obtained if the features of claims 9 and 10 are met. The throughput of the shredding device and its shredding behavior are favorably influenced if a suction box is connected directly below the classification net or grid of the shredding device, to which the pipe conveyor unit is connected and with which the shredded particles are immediately sucked away through the classification grid and through the suction box.

It has been shown that it is particularly advantageous to proceed in accordance with the feature of claim 12, since when using such plastic plates the wear on the inner walls of the shredding device can be minimized.

A compact modular system with a large capacity and low noise level is obtained if the procedure according to claim 18 is followed. It can be advantageous if the procedure according to claim 14 is followed. The transport device represents the only open connection between the cabin and the outside world during operation; the loading opening into which the transport device opens can, however, be soundproofed by means of appropriate curtains.

Such an arrangement becomes user-friendly if the procedure is as per claim 13. If the features of claim 15 are fulfilled, an increased

Separation effect during the transport path for foreign bodies and a certain transport time, which can be used for mutual coordination of the units of the arrangement, in particular the shredding device and the fine shredding unit. It is also expedient to implement the features according to claim 16.

A stable, easily controllable and wear-resistant transport unit is characterized by the features of claim 17. The same plastic is used as the plastic for the conveyor bed of the transport unit as is provided for the inner lining of the feed housing of the shredding device. The ridges and grooves provided in the conveyor bed shred particles and bodies that are caught by the conveyor beams and carriers and bring about a kind of self-cleaning with little wear on the conveyor bed.

A preferred embodiment of the invention implements the features of claim 21. This measure prevents the particles to be comminuted from melting or fusing with the housing wall or with each other, so that blockages of the arrangement or a reduction in the quality of the comminuted particles are avoided.

The features of claim 22 serve to increase operational safety with regard to filling or clogging of the pipe conveyor unit and the blockage extending back into the blower or into the fine shredding unit. In this way, any blockage of the pipe conveyor unit is limited to a certain extent or to a certain area that is easily accessible for appropriate cleaning devices or measures. Furthermore, no further shredding of the particles takes place in the fine shredding device and blockage of the same is avoided because the further supply of particles to the fine shredding device is stopped. Any backlog that may occur in the shredding device is detected by the control unit, which monitors the control current of the motor of the shredding tool of the shredding device, and the shredding device and/or the transport device are then switched off.

In principle, all rigid foams, especially biochips made of starch, can be shredded using the arrangement according to the invention.

In the following, the invention is explained in more detail using the drawing, for example. Fig. 1 shows a schematic plan view of the arrangement, Fig. 2 shows a schematic section in elevation, Fig. 3 shows a schematic view in elevation, Fig. 4, 4a and 4b show various views of a fine shredding unit and Fig. 5 shows an exploded view of a fine shredding unit.

Fig. 1 shows a schematic plan view of an arrangement according to the invention. This arrangement can be configured compactly in a small space and still be equipped with

work with a high throughput in terms of quantity. The compactness of the arrangement is also assisted by the fact that the noise pollution is not great, in particular due to the arrangement of the two shredding devices in a soundproof cabin 15.

In Fig. 1, such an arrangement is shown set up in a hall 1, which is accessible through an access gate 3 and an access door 4. At the entrance to the hall, the lumpy materials or bodies 5 delivered for reprocessing or shredding can be deposited in bags or unpacked. These bodies 5 are then placed on a sorting table 8; there, materials that cannot be shredded, e.g. foil, boards, cans, etc., with which the delivered bodies 5 are roughly contaminated, are sorted by hand. Contaminants adhering to the bodies 5, e.g. mortar residues, bolts, nails, etc. are not removed, but with the bodies 5 are fed to a transport device 10 via a feed hopper 9 and fed to a shredding device 11 with this transport device 10, in particular a conveyor belt that conveys into the cabin 15. The particles shredded in the shredding device 11 are fed to a fine shredding unit 12 via a pipe conveyor unit 13 indicated by dashed lines. From this fine shredding device, the particles are fed to a filling station 14 via the pipe conveyor unit 13 and filled via one or more outlets or dispensing units 117 into packaging units or bags 16 connected to these outlets 117.

The entire arrangement is controlled by a control unit 17. 7 designates a work station for the people operating the arrangement or sorting ; 6 designates a place where the previously sorted material can possibly be filled into containers intended for different materials.

The distribution of the individual units in Room 1 was chosen for work-economical and structural or operational reasons and results in minimal space requirements while allowing great mobility for the staff and the materials to be treated.

Fig. 2 shows a schematic sectional view of the arrangement in the direction of arrow A according to Fig. 1.

On the right in Fig. 2 you can see the delivered bodies 5 ready for shredding, which are simply deposited on the floor 43 and some of which have already been placed on the sorting table 8. From the sorting table 8, the bodies 5 are placed on the transport device 10 after foreign parts have been manually sorted out. The transport device 10 is connected to the cabin 15 through a loading opening 44, which is closed with curtains 45 for dust and noise protection reasons, and through a

corresponding inlet opening 46 into the feed housing 32 of the comminution device 11.

The transport device 10 has a conveyor bed 37 along which carrier beams 35, which carry claws 34, are moved by chains 36 driven by a motor M and convey the fed-in bodies 5. In the lower inlet-side end area of the conveyor bed 37, which is covered with plastic, grooves, ridges or depressions 38 are formed in order to grind up particles jammed between the carrier beams 35 and the conveyor bed 37 and thus ensure trouble-free operation of the transport device 10.

In the lower area of the feed housing 32 of the shredding device 11 there is a shredding tool 28 which has an elongated shredding bar, in particular one provided with a cutting edge, which has bent wing parts 29 at its end in order to cause a corresponding air flow in the direction of a classification grid 27.

The inner walls of the feed housing 32 are lined with replaceable plastic panels 31 to prevent damage to the inner walls of the feed housing 32. This plastic is the same plastic that is used to line the conveyor bed 37 and, if applicable, the floor of the room 1. The plastic material of the conveyor bed 37 or the cladding panels 31 consists of recycled plastic; the recesses or grooves 38 in the feed area of the conveyor bed 37 can be produced, for example, by milling.

The bodies 5 fed to the feed housing 32 are crushed by the crushing tool 28 until they can pass through the classification grid 27 into the suction box 30 below. In the lower area of this suction box 30 there is a heavy material separator 33 which is accessible and can be emptied through a corresponding lock or slide unit.

The beginning of the pipe conveyor unit 13 is connected to the suction box 30, which, as can be seen from Fig. 2, rises up to the upper area of the shredding device 11, where it takes a horizontal course and then lowers again.

Fig. 3 shows a view according to arrow B in Fig. 1. In the lower area of the conveyor unit 13 near the crushing device 11, a separator 33 is arranged for separating heavy parts. The upwardly guided pipe of the conveyor unit 13 is lowered to a vibration damping element and/or sound damping element 25 and in the lower area 47 of the conveyor unit 13 a connection to a fine crushing unit 12 and/or a blower 43 is made. In the area 47 there is a further heavy material separator 33. In the area after the vibration and/or sound damper 25 an intake nozzle 48 can be provided, which is used to connect a

Suction hose is used to suck up any particles lying around in room 1 for further shredding, similar to a vacuum cleaner.

Starting from the fine shredding unit 12 or the blower 43, the conveyor unit 13 comprises a vibration and/or sound damper 26 and is led out of the essentially sound-insulating cabin 15 upwards near or to the ceiling 50 and then shows an essentially horizontal course with a switch 49, which can optionally supply two outlets 117 with shredded particles when controlled by the control device 17.

The cabin 15 has in particular sound-insulating wall and ceiling elements and is designed to be dismantled. According to the invention, it is particularly advantageous that all noise-generating units are housed in the sound-insulated cabin 15. This also applies to the blower 43 that generates the pressure in the conveyor unit 13. The cabin is accessible via a lockable door with an inspection window; its walls and ceiling are constructed accordingly stably in order to ensure appropriate safety against parts being thrown off in the event of damage to the shredding device or the fine shredding unit.

The pipelines of the conveyor unit 13 are formed in particular from metal pipes with a round cross-section, which are earthed in order to eliminate electrostatic influences. The diameter of the pipes is approximately 10 to 20 cm.

In the crushing device 11, the supplied bodies 5 are crushed to a grain size of in particular less than 20 mm; this particle size distribution depends in particular on the classification sieve 27 used, the speed and the length of the crushing tool 28. The parameters and dimensions of the crushing device 11 and the parameters and dimensions of the fine crushing unit 12 are mutually coordinated.

With the arrangement according to the invention, a volume reduction of the delivered bodies of about 60 to 70% is achieved, whereby the resulting particles are free of foreign bodies and have a structure and shape suitable for subsequent conditioning or reuse.

The shredding tool 28 of the shredding device 11 is driven by a stationary motor M, the rotor of which is sealed from the feed housing by means of a labyrinth seal in order to prevent the ingress of plastic dust.

This blower 43 can be arranged in the transport path of the particles crushed by the crushing device 11 before or after the fine crushing unit 12. In principle, it is entirely possible to arrange the fine crushing unit 12 and the blower 43 separately as independent components connected via a conveyor line. An advantage of independently driven shafts of the fine crushing device

12 or the blower 43 would be that these two devices can be regulated independently of one another in terms of their speed; for reasons of cost and space, however, it is preferable if these two units are combined into one structural unit and are only coordinated with one another based on appropriate structural dimensions. According to the invention, however, it is preferred to connect this turbine-like blower 43 immediately after the fine shredding unit 12, in particular to form it in one piece with the fine shredding unit 12.

According to Fig. 4, 4a and 4b, the fine shredding device 12 has a shredding or impeller wheel 18 driven by a motor M in a housing 50. This impeller wheel 18 carries a number of blades 40 attached to its shaft 19, which extend from the driven shaft 19. The outgoing blades 40 are advantageously connected to a ring 42 for stability reasons. In addition to the blades 40, striking elements 41 can be provided, which in the present case are hinged to the ring 42 and extend in the radial direction when the impeller wheel 18 rotates. The fine shredding unit 12 is fed through its cover plate 51 through an essentially centrally located feed opening 52 to which the conveyor unit 13 is connected. By means of the blower 43, the pre-crushed particles are sucked into the housing 50 or to the impeller 18, where they are crushed and, due to the feed pressure, pass through a classification grid 20 which surrounds the impeller 18 on the periphery. The permeability or the dimensions of the classification grid 20 are selected depending on the desired grain size of the crushed particles.

Fig. 4b shows a schematic of a combination of a fine grinding unit 12 with a blower 43. The impeller 40 and the blower blades are located on the same shaft 19 and are separated by a wall 21. The particles crushed by the impeller 18 enter the blower 43 via peripheral channels 23 or corresponding transport spaces and are transported further by the blower blades 42 or the air flow generated, namely into the central connection piece 24 of the conveyor device 13 in this case in Fig. 4b or into a connection piece 24 connected in the axial area of the shaft 19.

Fig. 4a shows an embodiment in which the fine grinding unit 12 with the blower 43, which is mounted on support legs 43, has an upwardly extending connection piece 24 which, as indicated in Fig. 4b, opens into the space containing the impellers 18.

The flow conditions in the conveyor unit 13 are selected in such a way that the blower 43 sucks the pre-shredded particles to the impeller 18 and that the shredded particles are conveyed by the blower 43 to the filling station 14. For this reason, the speeds of the shredding device 11 and the fine shredding device 12 or the blower 43 and the dimensions and

Parameters of the wings 40 and the fan blades 22 or the shredding tool 28 are coordinated with one another and the operation is monitored and controlled by the control unit 17.

Fig. 4a shows a vibration damping element 25 arranged above the connection 24 and subsequently a sound damping element 26.

In Fig. 3, a wavy line 53 indicates a boundary, which is intended to be the boundary of a dimensioned backflow zone that extends from the collection containers 16 or the connections 117 of the collection containers 16 to approximately this boundary 53. If the collection containers 16 are full and the arrangement is not switched off, particles continue to be transported via the conveyor unit 13 to the filling station 14 and the pipe of the conveyor unit 13 becomes blocked beyond the switch 49 in the direction of the blower 43. If the blockage of the pipe 13 extends to the boundary area 53, the conveying pressure decreases or the pressure of the air generated by the blower 43 is no longer sufficient to feed further particles from the fine grinding unit 12 or the blower 43 of the conveyor unit 13; This means that the vertical area above the blower 43 and the horizontal part 54 of the conveyor unit 13, which in this case is only very small, remain free of clogging particles. This prevents complete clogging of the conveyor unit 13 and unwanted clogging of the blower. This intended target accumulation zone extends from the connections 117 to the predetermined limit 53, which depends on the parameters of the arrangement, and prevents unwanted clogging in areas of the conveyor unit 13 that are not easily accessible.

It is advantageous if a thermal sensor 55 is installed in or on the housing 50 of the fine shredding device 12, which is connected to the control unit 17 and detects an impermissible heating of the fine shredding device 12. As a result of an impermissible heating, which could occur if the fine shredding unit 12 is clogged or the amount of pre-shredded particles fed in is too large, the particles could melt. In response to an impermissible heating, the operation of the shredding device 11 and/or the transport device 10 can be reduced or switched off.

The plastic plates 31 provided in the shredding device 11 or the plastic plates with which the floor of the workstation 7 or the sorting table 8 and/or the inlet area of the transport device 10 are covered are plastic plates made of 100% recycled plastic that correspond to the relevant specifications of the Austrian Plastics Institute. Such HDPE recycled plates are sold, for example, by the company REPLAST Kunststoffwiederverwertungs Ges.m.b.H.

The speed of the rotor of the crushing device 11 is approximately 1500 rpm.; advantageously, the speed is adjusted depending on the diameter of the recesses or

Holes in the classification grid 27 are set to 1200 to 1700 rpm. The length of the crushing tool 28 is between 60 and 90 cm, whereby the length or the dimensions of the preferably square housing 32 of the crushing device 11 is approximately 10 to 20%, preferably 15% larger than the length of the crushing tool 28. The classification grid 27 can have holes of 5 to 50 mm diameter.

The speed of the crushing wheel 18 or the impeller 22 in the fine crushing unit 12 is approximately 2300 to 3300 rpm. Advantageously, the speed ratio between the crushing tool 29 and the crushing wheel 18 or the impeller 22 is in a range of 1:1.5 to 1:2.5.

The classification grid 20 of the fine crushing device 12 has recesses or passages in the order of 3 to about 40 mm in diameter.

The area of the permeable holes in the classification grid 27 of the crushing device 11 is approximately 30 to 60% of its total area or the bottom area of the housing 32.

The conveying capacity of the blower of the fine shredding device is in the range of 800 to 1600 m ³ of air per hour.

Fig. 5 shows an exploded view of the fine crushing unit 12. It can be seen that two adjacent impact elements 41 are carried by the impeller 18. 56 designates a seal for the pivoting front wall 51 of the fine crushing unit 12. The classification grid 20 can be replaced and fastened to a frame 57 in the fine crushing device 12, in particular to the partition wall 21.

The impeller 22 comprises four blades, which in this case are formed by a U-profile, and convey the air and the crushed particles into the connection piece 24.

The arrangement according to the invention is particularly simple if only a single blower 43 is provided for conveying the crushed particles or particles to be crushed, which is arranged immediately downstream of the fine crushing device 11.

Claims (28)

Protection claims: 1. Arrangement for the comminution and/or processing and/or conditioning and/or disposal of bodies or lumpy parts made of rigid or structural foam and/or bodies made of similar expanded, in particular foamed or extruded, materials or plastics, such as in particular based on polystyrene or the like, in particular also for waste from these materials, with a comminution device which, if appropriate, has at least one preferably rotating comminution tool in its feed housing, which is preferably supplied with a transport device for the bodies or lumpy parts, in particular in the lower area of the same, and with at least one transport unit, preferably formed by a pipe conveyor unit, for transporting the crushed particles from the comminution device to a filling station in which the particles are filled into collection or packaging sleeves or containers, whereby between the comminution device serving as a pre-crusher for pre-crushing the fed bodies to predetermined grain sizes and the advantageously a plurality of dispensing units for the connection of the collecting or packaging sleeves for comminuted particles, a re-comminution or fine comminution unit is switched on or installed in the filling station, characterized in that the speeds and thus the comminution effect of the comminution device (11) and the fine comminution unit (12) can be adjusted and adapted to one another with a control unit (17). 2. Arrangement according to claim 1, characterized in that the fine comminution unit (12) has at least one impeller (18) which rotates rapidly and crushes particles. 3. Arrangement according to claim 2, characterized in that the fine crushing unit (12) or the impeller (18) is fed with the particles centrally in the area of the axis of rotation or shaft (19) of the impeller (18) and that the particle discharge takes place peripherally, in particular through a classification grid (20). 4. Arrangement according to one of claims 1 to 3, characterized in that the fine comminution unit (12) is followed by a blower (43) with which the particles are sucked out of the fine comminution unit (12), whereby Preferably, the fine grinding unit (12) and the blower (43) are combined to form a structural unit. 5. Arrangement according to claim 4, characterized in that the impeller (18) is coupled through a partition wall (21) to a blower wheel (22) of the blower (43) and the particles comminuted by the impeller (18) are diverted via at least one peripheral transition or channel (23) into the area of the blower wheel (22) and are fed from the blower wheel (22) via an outgoing connection part (24) of a pipe conveyor unit (13). 6. Arrangement according to claim 4 or 5, characterized in that the pipe conveyor unit (13) is designed as a pressure or suction air conveyor unit, whereby the suction or conveyor pressure is created by the blower (43). 7. Arrangement according to claim 5 or 6, characterized in that the particles crushed by the crushing device (11) are sucked into the fine crushing unit (12) or up to the blower wheel (22) by means of the negative pressure generated by the blower wheel (22) and are conveyed by the blower wheel (22) with the generated positive pressure to the filling station (14). 8. Arrangement according to one of claims 1 to 7, characterized in that in the section of the pipe conveyor unit (13) extending from the fine crushing unit (12), in particular upwards, a vibration damping element (25) and/or a silencer (26) optionally surrounding the pipe of the conveyor unit (13) is inserted or provided. 9. Arrangement according to one of claims 1 to 8, characterized in that the base of the crushing unit (11) is formed by a classification net or grid (27) extending in particular over the entire base area. 10. Arrangement according to one of claims 1 to 9, characterized in that the crushing tool (28) is an elongated bar knife, optionally with edge parts (29) bent downwards like wings in the end regions. 11. Arrangement according to claim 9 or 10, characterized in that below the classification net or grid (27) of the shredding device (11) there is a suction box (30) to which the pipe conveyor unit (13) is connected. 12. Arrangement according to one of claims 1 to 11, characterized in that the inner walls of the preferably square feed housing (32) of the shredding device (11) are lined with plastic plates (31). 13. Arrangement according to one of claims 1 to 12, characterized in that a sorting table (8) provided for feeding the bodies (5) or its worktop, the comminution device (11) or the comminution tool (28), the fine comminution unit (12) and/or the impeller (18) and the delivery units (117) of the filling station (14) are erected or arranged at essentially the same level (43). 14. Arrangement according to one of claims 1 to 13, characterized in that a transport device (10), in particular a conveyor belt or a bar conveyor, emanating from a sorting table (8), opens into the upper region of the optionally all-round closed feed housing (32) for feeding the bodies (15) to be shredded. 15. Arrangement according to one of claims 1 to 14, characterized in that the pipe conveyor unit (13) rises between the comminution device (11) and the fine comminution unit (12) or between the fine comminution unit (12) and the filling station (14) or the dispensing units (117) preferably above head height or in particular above the upper end regions of these units (11, 12). 16. Arrangement according to one of claims 1 to 15, characterized in that in the outlet area of the comminution device (11) and/or in the inlet and/or outlet area of the fine comminution unit (12) and/or at least one low position of the pipe conveyor unit (13), in particular with locks or slides, separating units (33) are arranged or designed for removing or separating heavy parts. 17. Arrangement according to one of claims 1 to 16, characterized in that the transport unit (10) has a fixed conveyor bed (37) covered with plastic, along or over the conveyor beam (35) running transversely to the transport direction (10), optionally provided with upwardly projecting drivers (34), possibly moved further by means of chains (36), the bodies to be shredded (5) are conveyed into the shredding device (11) and that, if necessary, in the feed area or in the area of the conveyor bed close to the sorting table (8) _ &Lgr;&Agr; _ (37) of the transport unit (10) in the plastic covering ridges, grooves, depressions (38) or the like are formed. 18. Arrangement according to one of claims 1 to 17, characterized in that the shredding device (11) and the fine shredding unit (12) are arranged in a cabin (15) which is soundproofed at least in the wall and ceiling area, with the transport unit (10) being installed or opening into one wall (39) of the cabin, and with the sorting table (8) advantageously being attached to this wall (39). 19. Arrangement according to one of claims 1 to 18, characterized in that the speed of the transport unit (10) can be regulated, in particular continuously, by the control unit (17). 20. Arrangement according to one of claims 1 to 19, characterized in that the control unit (17) monitors the speed of the rotor or the comminution tool (28) of the comminution device (11) and the impeller (18) of the fine comminution unit (12), if necessary by measuring the current consumption of the respective drive motors (M), and controls the speed of these units or switches them off if necessary. 21. Arrangement according to one of claims 1 to 23, characterized in that a temperature sensor (55) is arranged in the fine comminution unit (12), with which the temperature, in particular of the housing (40) in the area of the impeller (18), can be monitored and that in the event of overheating, in particular of the housing (40), the control unit (17) reduces the feed quantity by slowing down or switching off the transport unit (10) and/or switching off the fine comminution unit (12) or the entire arrangement. 22. Arrangement according to one of claims 1 to 21, characterized in that in the end region of the pipe conveyor unit (13) in front of the filling station a safety accumulation zone is provided, the length of which corresponds approximately to 10 to 25 times the diameter of the pipes used in the conveyor unit (13), whereby when the safety accumulation zone is filled with crushed particles intended for filling, the conveying air is accumulated to a pressure which corresponds to the conveying pressure of the blower (43) of the fine crushing unit (12), and thus further transport of the crushed particles from the fine crushing unit (12) is prevented. 23. Arrangement according to one of claims 1 to 22, characterized in that the pipes of the conveyor unit (13) consist of metal and are earthed. 24. Arrangement according to one of claims 2 to 23, characterized in that on the impeller (18) between its wings (40) in the plane of rotation pivotable impact parts (41) are articulated and/or that the wings (40) are connected to a ring (42) to which the impact parts (41) are articulated, whereby the wings (40) and the impact parts (41) preferably extend to just in front of the classification grid (20). 25. Arrangement according to one of claims 1 to 24, characterized in that the ratio of the speeds of the comminution tool (28) of the comminution unit (11) to the speed of the impeller (18) or speed of the blower wheel (22) is set to a value of 1:1.5 to 1:2.5 with the control unit (17). 26. Arrangement according to one of claims 5 to 25, characterized in that the impeller (18) and the blower wheel (22) are arranged on a shaft (19) and are driven by the same motor (M). 27. Arrangement according to one of claims 1 to 26, characterized in that the adjustment of the rotational speeds is carried out with control programs present in the control unit, which take into account parameters of the bodies, e.g. feed size, material, composition and type, density or the like. 28. Arrangement according to one of claims 1 to 27, characterized in that the
Control unit an input unit for selectable parameters and/or for selectable
speed ranges.