EP4299301A1 - Baler with rotor roller - Google Patents

Abstract

The invention relates to a bale press (100) with a rotor roller (15) according to the preamble of claim 1 as well as a pressed material feed device (200) for a bale press (100) according to claim 10 and a retrofit kit for a bale press according to claim 11.

The baler (100) includes:
- a press housing (11) surrounding a press chamber (10),
- a press shield (12) that can be moved in the press housing (11),
- a filling opening (13) for filling material to be pressed (14) into the press housing (11),
- a rotatably drivable rotor roller (15) arranged on the filling opening (13) with rotor teeth (16) distributed on its circumference and along its longitudinal extent, which conveys the material to be pressed (14) into the filling opening (13),

In order to accelerate the loading of such baling presses with pressed material (14) and to minimize the risk of clogging, it is proposed that a retainer (17) is arranged on the side of the filling opening (13) facing away from the pressing chamber (10), which is arranged together with the rotor roller (15 ) limits a filling channel (23).

Description

The invention relates to a baler with a rotor roller according to the preamble of claim 1 as well as a pressed material feed device for a baler according to claim 10 and a retrofit kit for a baler according to claim 11.

For example, in a supermarket, a baler is used to compress packaging materials such as cardboard boxes, plastic films or the like as accurately as possible and make them available for disposal. For this purpose, the baler has a press housing that surrounds a press chamber. A press shield is movable in the press housing and is in particular driven hydraulically. A filling opening is formed on the press housing in order, for example, to be able to fill cardboard boxes to be compressed into the press housing. Furthermore, a rotatable rotor roller is arranged at the filling opening. Rotor teeth that point essentially radially outwards are arranged on their outer circumference. As soon as a pressed material reaches the area of the rotating rotor teeth, for example in a filling space assigned to the rotor roller, the pressed material is taken along and conveyed into the press housing. If necessary, a movable slide can be provided in the filling space in order to push the material to be pressed in the direction of the rotor roller.

Such a baler is from the EP 2 129 515 B1 known. The rotor roller can be assigned a guide surface for guiding the material to be pressed, which in turn also can be slotted so that the rotor teeth engage in these slots. This ensures complete conveyance of the material to be pressed.

Another baler with a rotor roller is from the DE 20 2017 100 780 U1 known. Slots can also be formed in a slide for feeding pressed material and in a conveyor table below the rotor roller, into which the rotor teeth of the rotor roller engage.

However, especially when a large amount of pressed material is to be conveyed through the rotor roller, it can happen that the pressed material gets jammed like cardboard in one of the slots and a blockage occurs. This then results in the baler coming to a standstill and requires laborious manual removal of the blockage.

Out of DE 10 2010 039 297 A1 a pressing device with a rotatable rotor roller equipped with conveyor tines is known. Pressed material to be pressed is fed to the rotor roller to such an extent that it can be captured by it and conveyed into the interior of the collecting container by means of the conveyor tines between a jacket formed by the contour of the conveyor tines and a pressed material guide wall arranged underneath. The rotor roller and the pressed material guide wall thus delimit a filling channel through which the pressed material is conveyed.

The pressed material guide wall can be pivoted about a pivot axis on its side facing the filling space. On its other side, the pressed material guide wall is spring-loaded. Any pivoting of the pressed material guide wall thus takes place against a force exerted by the spring. If the pressure force exerted by the rotor roller or the pressed material located between the rotor roller and the pressed material guide wall exceeds the spring force, the pressed material guide wall is pivoted against the spring force and the opening width of the filling channel is thereby increased.

The disadvantage of this is that although overloads are avoided, light or small quantities of pressed material are conveyed through the filling channel with such little resistance that, under unfavorable conditions, the pressing chamber is not filled evenly, but rather, for example, mainly in the middle. Pressed bales produced in this way are not dimensionally stable in the corner areas and, in contrast to bales produced when the press chamber is evenly filled, are relatively light. Another advantage is that that there is less material between the rotor and the guide plate during the pressing process. This can be the case in connection with the metered supply of pressed material to the rotor.

Out of DE 10 2007 036 293 A1 and DE 10 2005 046 552 A1 Agricultural piston presses are known for producing cuboid bales from agricultural crops such as straw, hay or the like. Such large balers essentially consist of a pickup drum for picking up the crop from the harvested soil, which is followed by a cutting rotor with a downstream conveyor rake. The crop picked up from the ground is fed to a press channel with a reciprocating press piston. Like in particular the largely identical one in both applications illustration 1 shows a cardan shaft 43 is indicated in the front area of the press channel. It is clear to the person skilled in the art that this cardan shaft is arranged laterally outside the press channel and is intended in a known manner to provide energy for driving the cutting device and the receiving device. The crop fed to the press channel by the receiving device is thus conveyed into the press channel with little resistance. A device for retaining or combining the crop in the area of the press channel entrance, i.e. a type of retainer, is not provided.

Out of EP 2 012 926 B1 a unit for compacting hollow bodies with a drivable roller and hook-shaped cutting edges arranged on the roller is known. The cutting edges serve to perforate and crush the hollow bodies, which can be, for example, PET plastic bottles. After the hollow bodies have been compacted in this way, they are fed to a collecting container. A pressing device for creating bale-shaped containers is not provided. Another disadvantage of the device described is that when compacting hollow bodies with a spring-loaded groove wall, once the spring force is reached, the opening between the rotor and the groove wall increases and no longer all hollow bodies are compacted/perforated.

The object of the invention is to eliminate the disadvantages described and to accelerate the loading of a bale press with pressed material. An appropriately designed baler should be specified for this purpose.

This task is solved by a baler with the features of patent claim 1. An existing baler can be retrofitted with a pressed material feed device according to patent claim 10 or a retrofit kit according to patent claim 11.

A baler includes a press housing, preferably made of metal, which forms a press chamber. In the press housing, a press shield can be moved, in particular hydraulically, in order to compress material to be pressed in the press chamber. For this purpose, a filling opening is formed on the press housing in order to be able to fill the pressed material, such as cardboard boxes or plastic films, into the press housing or the actual pressing chamber as accurately as possible. Furthermore, a rotatable rotor roller is arranged at the filling opening. On the outer circumference of the rotor roller, rotor teeth are formed or arranged distributed around its circumference and its longitudinal extent. The rotor teeth can, for example, point essentially radially outwards. With the rotating rotor teeth, the material to be pressed is conveyed from the area of the filling opening to the interior of the press housing, with the rotor teeth, for example, clinging to the cardboard boxes to be filled in in order to promote this.

The core idea of the invention is that the rotor roller is additionally assigned a retainer on the side of the filling opening facing away from the press chamber. The retainer, together with the rotor roller, defines a filling channel through which the material to be pressed is first conveyed towards the filling opening and then into the pressing chamber. The filling channel formed between the rotor roller and the retainer preferably tapers towards the press chamber. In contrast to devices known as prior art, the material to be pressed undergoes pre-compression as it passes through the filling channel and a larger amount of material to be pressed can be conveyed into the pressing chamber before it is so full that the press shield has to be actuated. This effect is particularly positive when little material or thin material to be pressed is to be conveyed into the press chamber using the rotor roller. In such a case, additional pressure is exerted on the material to be pressed via the retainer. This improves the filling of the chamber and results in an even filling that extends to the corners of the pressing chamber and to the chamber door. As a result, the bales produced in this way are heavier and at the same time more dimensionally stable compared to bales produced with a baler without a retainer.

The retainer reduces the available filling opening. This means that there is less area available through which the material to be pressed can pass through the filling opening or this is reduced in size overall. This ensures that large amounts of material cannot be filled in at once, which could, for example, lead to a blockage in the filling opening or on the rotor roller.

Furthermore, it can be seen that the baler can be equipped, among other things, with a press shaft door in order to be able to remove a compressed bale from the baling chamber, as well as with an ejection device for the compressed bale and/or with a strapping device in order to wrap the compressed bale with wires, Strapping tapes or the like, in particular automatically. Furthermore, an appropriately designed control system can also be provided for all functions of the baler.

The advantage of the invention is that the additional retainer initially reduces the filling opening, but when filling manually or automatically from a filling space with a movable slide, the material to be pressed is fed to the rotating rotor roller in an orderly manner and the filling is thus accelerated. Overall, faster and more effective filling of the press chamber is achieved.

If, for example, a blockage occurs on the rotor roller, it can be driven in opposite directions and the blocked material to be pressed is then automatically stripped off at the retainer.

Advantageous embodiments of the invention are the subject of subclaims.

In a preferred embodiment, the retainer can comprise webs which are preferably arranged between the spaced rotor teeth over a longitudinal extent of the rotor roller. The webs thus interact with the rotor teeth and support the conveying of the pressed material. They also make it easier to remove a blockage when clearing a blockage or reversing the rotor roller, since when the rotor roller is rotating backwards, the rotor teeth engage in the free spaces and press any trapped material into the filling channel, which expands conically during reversal operation.

The retainer or its webs can preferably be made of metal in order to have sufficient wear resistance.

In principle, the retainer can also be designed as a component that is essentially continuous over a longitudinal extent of the rotor roller, for example in the form of a flap, preferably as a flat metal sheet.

According to a further development, the retainer and/or its webs are movable relative to the filling opening or the rotor roller, in particular pivotally movable about an axis of rotation. This allows the height provided as a passage for the filling channel to be varied. For example, if larger quantities of pressed material occur, the pressed material can preferably press down the retainer or push it away from the filling opening in order to enlarge it in this way. Thus, for example, a filling channel between the rotor roller and a guide surface is available in its full cross section in order to convey pressed material into the interior of the press housing through the rotor roller. If the retainer is designed as a continuous flap, this can also be designed to be pivotable and equipped with the spring force of one or more springs.

In order to enable automatic adjustment of the height of the filling channel to the material to be pressed, the retainer and/or its webs can comprise at least one spring which applies a spring force to the retainer and/or the webs. By means of the spring force, the retainer and/or the webs are held in a position in which the webs are arranged between the rotor teeth, viewed in the radial direction of the rotor roller. This means that the retainer or its webs are held individually or jointly by means of a spring force in a position in which they protrude into the filling channel or into an area between the rotor roller and a guide surface. If pressed material is filled in, it can, for example, press down individual webs. This expands the filling channel and the rotor roller can convey the material to be pressed towards the press chamber with little resistance using its rotor teeth. For example, the movable webs and a guide surface on the filling channel are preferably designed in such a way that a substantially flush or smooth, continuous guide surface results when the webs are depressed. This means that no material to be pressed can get stuck, for example, between the movable webs and sections of the guide surface.

In particular, the spring force exerted by the spring is adjustable, preferably individually for each web. For example, different pressed material can be used for each Optimal conveying requires a harder or softer spring setting in order to be able to fill the largest possible amount of material into the baler as quickly as possible.

In order to improve the conveyance of the material to be pressed by means of the rotor teeth on the rotor roller through the filling channel, teeth, profiles, barbs or the like can be formed on the webs or the retainer. These effectively prevent the material to be pressed from moving into the press housing against the conveying direction and thus, for example, causing a blockage in the filling channel. In principle, corresponding barbs or the like can also be formed on the rotor teeth in order to hook into the pressed material to be conveyed through the rotational movement of the rotor teeth on the outer circumference of the rotor roller and to convey this through the filling channel.

According to a further embodiment, the retainer as a whole can be displaced, in particular manually, out of the filling opening or a filling channel. This can be achieved, for example, using appropriate mechanics. For this purpose, for example, in a guide surface assigned to the rotor roller, which forms the filling channel together with the rotor roller, slots are formed, which are penetrated by the retainer or its webs. In order to make the filling channel completely clear, for example for cleaning it, the retainer can be completely displaced away from the rotor roller and out of the slots. This can be done manually, for example, using a lever.

According to a further development, the retainer, and in particular its individual webs, are designed to be interchangeable. This makes it easier to replace individual webs that are damaged by foreign bodies or wear contained in the material to be pressed. For example, the webs can be screwed and/or locked to a holder in order to enable exchange.

A pressure or force sensor is preferably assigned to a movable retainer or its webs. The sensor can be used to measure the force or pressure with which, for example, an individual spring-loaded web is acted upon by the conveyed material to be pressed. If, for example, a permissible maximum value is exceeded, a control system can automatically stop the rotation of the rotor roller in order to avoid damage to the baler. That can also be the case Sensor signal can be used to individually adjust a spring force via the control depending on the material to be pressed.

A known baling press is equipped with an assembly which is referred to as a pressed material feed device. This comprises a rotatably drivable rotor roller with rotor teeth arranged distributed on its circumference and along its longitudinal extent, which preferably point essentially radially outwards. The rotor roller, in turn, is arranged at a filling opening of the baler. Pressed material is filled into the interior of a press housing through the filling opening in order to be compressed by a press shield that can be moved in the press housing. The rotor roller is assigned a retainer at the filling opening or at a filling channel between the rotor roller and an associated guide surface. The retainer, or its webs, are arranged between the rotor teeth over a longitudinal extent of the rotor roller. The retainer ensures that baled material is fed into the baler in an orderly manner.

An existing baler can be retrofitted with a retrofit kit. For this purpose, the retrofit kit includes a pressed material feed device described above. This can, for example, be placed on the baler like an attachment in order to arrange the rotor roller with the retainer in the area of the filling opening of the baler.

Fig. 1

eine Ballenpresse mit einer Pressgutzufördereinrichtung inclusive eines Rückhalters,

Fig. 2

einen Ausschnitt A aus Fig. 1 mit dem in einer ersten Position befindlichen Rückhalter,

Fig. 3

einen Ausschnitt A aus Fig. 1 mit dem in einer zweiten Position befindlichen Rückhalter,

Fig. 4

einen Ausschnitt A aus Fig. 1 mit dem in einer dritten Position befindlichen Rückhalter,

Fig. 5

die Pressgutzufördereinrichtung im Querschnitt und

Fig. 6

die Rotorwalze mit dem Rückhalter in Seitenansicht.

The figures show:

Fig. 1

a baler with a pressed material feed device including a retainer,

Fig. 2

a section A Fig. 1 with the retainer in a first position,

Fig. 3

a section A Fig. 1 with the retainer in a second position,

Fig. 4

a section A Fig. 1 with the retainer in a third position,

Fig. 5

the pressed material feed device in cross section and

Fig. 6

the rotor roller with the retainer in side view.

The same or similar elements can be provided with the same or similar reference numbers in the following figures. Furthermore, the figures in the drawing contain their Description and the claims numerous features in combination. It is clear to a person skilled in the art that these features can also be considered individually or they can be combined to form further combinations not described in detail here. The invention also expressly extends to those embodiments which are not given by combinations of features from explicit references to the claims, which means that the disclosed features of the invention can be combined with one another in any way, as long as this makes technical sense. The exemplary embodiments shown in the figures are therefore only descriptive and are not intended to limit the invention in any way.

The terms used below: “upper”, “top”, “lower”, “left” or “right” refer to the arrangement of the components shown in the drawing. The figures are to be viewed purely schematically to illustrate the invention.

Fig. 1 shows a baler 100 purely schematically in a side view. The baler 100 includes a press housing 11, which is preferably made of metal and forms a press chamber 10. In the press housing 11, a press shield 12 can be moved, in particular hydraulically. At the in Fig. 1 The baler shown is a vertical baler. The baler can also be a horizontal baler with a horizontally movable press plate 12. With the press plate 12, a pressed material 14, such as cardboard boxes, foils or the like, which are produced in a supermarket, for example, is preferably pressed according to type in the press chamber 10. In addition, a strapping device can be provided in order to strap the pressed material 14 with wires, bands or the like. Likewise, a press chamber door can be provided to remove a pressed bale from the press chamber 10, as well as an ejection device for the bale.

The material to be pressed 14 is filled into the press housing 11 through a filling opening 13 when the press shield 12 is moved upwards. The filling opening 13 is assigned a rotor roller 15, which can be driven rotatably in a direction of rotation D. On the circumference of the rotor roller 15, rotor teeth 16 pointing radially outwards are arranged distributed over the longitudinal extent of the rotor roller 15. Serrations, projections or the like can also be formed on the rotor teeth 16 in order to get caught in the pressed material 14 and to reliably convey it into the baler 100. Furthermore, a filling space 19 can be provided on the baler 100 in the area in front of the filling opening 13, in which a Slider 20 executes a pendulum movement P in order to convey the pressed material 14 in the direction of the filling opening 13 or the rotor roller 15.

The rotor roller 15 is arranged here outside the press housing 11, i.e. in front of the filling opening 13. In principle, the rotor roller 15 can also be arranged such that its axis of rotation 30 lies essentially in a surface of the filling opening 13 in the press housing 11 in order to minimize the size.

A retainer 17 is assigned to the rotor roller 15. The rotor roller 15 and the retainer 17 together form a pressed material feed device 200, the function of which is described below.

The Fig. 2 to 4 show a section A Fig. 1 . The rotor roller 15 can be driven in a rotary manner, as illustrated by the double arrow D. In one direction of rotation, pressed material 14 is conveyed towards the filling opening 13 and in the opposite direction, for example, clogged pressed material 14 can be loosened. The rotor roller 15 with the rotor teeth 16 is assigned the retainer 17, which is in the 5 and 6 is described in more detail. The retainer 17 is acted upon by the spring force F of a spring 21 and can move in the direction of movement B, as illustrated by the double arrow B.

For example, the retainer 17 can be pressed into a raised position P1 by the spring 21 as in Fig. 2 can be seen or it is pressed into a slightly depressed position P2 by the pressed material 14 conveyed by the rotor roller 15 as in Fig. 3 visible. At maximum throughput of pressed material, the retainer 17 is completely pressed down into a position P3 (cf. Fig. 4 ).

In order to enable mobility in direction B, the retainer 17 in the illustrated embodiment is rotatably mounted about an axis of rotation 26 and acted upon by the force F of the spring 21 by means of a corresponding lever mechanism.

If there is no material to be pressed 14, the retainer 17 is pushed upwards into position P1 in order to prevent material to be pressed 14 from emerging from the press housing 11 back out of the filling opening 13. As a result, the filling of the press chamber 10 is accelerated and there are fewer blockages on the rotor roller 15.

For this purpose, slots are formed in a guide surface 24, which forms a filling channel 23 for the material to be pressed 14 between itself and the rotor roller 15, through which the retainer 17 or its webs 22 pass. If the retainer 17 is fully depressed in position P1, it is preferably flush with the surrounding guide surface 24 to form a smooth surface.

In Fig. 5 the rotor roller 15 with its rotor teeth 16 is shown in cross section. It can be seen that the rotor teeth 16 do not necessarily have to be arranged uniformly over the longitudinal extent of the rotor roller 15, but, as here, can also be arranged offset from one another around the circumference of the rotor roller 15.

Furthermore, the retainer 17 is shown in three different positions, namely once seen in the direction of movement B in a lowered position P3, which is shown with solid lines, in a middle position P2 and a raised position P1, which are each indicated by dash-dotted lines. By pivoting the retainer 17 about the axis of rotation 26, a height 25 of the filling channel 23 on the side facing the press chamber 10 changes. The height 25 is understood to mean the distance that an outer end point 27 of the retainer 17 has to an outer orbit 28 of the rotor teeth 16. The orbit 28 has a radius 29 starting from an axis of rotation 30 of the rotor roller 15.

When the retainer 17 is in position P1, the height 25 of the filling channel 23 has a negative value H1, since the outer end points 27, which are formed by the ends of the webs 18, are located within the orbit 28 (cf. Fig. 5 ).

When the retainer 17 is pivoted into position P2, the pressed material 14 has already pushed the retainer 17 out of the orbit 28 and the height 25 of the filling channel has a positive value H2.

When the retainer 17 is pivoted into position P3, the height 25 of the filling channel has increased to a maximum value H3.

In the exemplary embodiment shown, the retainer 17 comprises a spring 21, which transmits a spring force F to the retainer 17 via a correspondingly designed lever mechanism. A pressed material 14 that passes through the rotor roller 15 or its rotor teeth 16, through the filling channel 24 to the filling opening 13 in the press housing 10 is conveyed, presses the retainer 17 down from position P1 and releases it again as soon as the material to be pressed has passed the retainer 17. The filling channel 23 is formed between a guide surface 24 and the rotor roller 15. In the lowest or lowered position P3, the retainer 17 or its webs 22 are preferably flush with the guide surface 24 in order to form a smooth filling channel 23.

In Fig. 6 the rotor roller 15 with its rotor teeth 16 is shown in a side view. The rotor teeth 16 are arranged at a distance from one another, preferably equidistantly, as seen over the longitudinal extent of the rotor roller 15. The retainer 17 has a plurality of webs 22, which are also arranged at a distance from one another, preferably equidistantly, as seen over the longitudinal extent of the retainer 17. The webs 22 are distributed in such a way that they are each arranged between the rotor teeth 16. In the raised position of the retainer 17 or the webs 22, the webs 22 and the rotor teeth 16 overlap. The webs 16 engage between the rotor teeth 16 in the existing empty space or mesh with them. This effectively prevents pressed material 14 from getting back from the press housing 11 to the rotor roller 15, which would lead to a blockage. The webs 22 in the raised position P3 prevent the pressed material from being gripped by the rotor teeth 16 again, particularly when the D rotor roller 15 rotates counter to the actual conveying direction. In this way, for example, blockages on the webs 22 or the retainer 17 can be removed.

The retainer 17 can be subjected to a total spring force F. Alternatively, it is also possible for each web 22 to be subjected to a spring force F individually or to several webs 22 in groups. This results in individual mobility of the webs 22 or the web groups, so that, for example, a pressed material 14, which here passes the rotor roller 15 in a left area, only presses down the webs 22 on the left side and the webs 22 on the right side of the retainer 17, however, remain in their raised position. In particular, the spring force F of the one or more springs 21 is preferably individually adjustable, for example to enable adaptation to different pressed goods 14.

It can be seen that all components of the baler 100 and in particular the rotor teeth 16, the webs 22 and the springs 21 can be interchangeable in order to be able to replace them, for example if they are worn out.

A baler 100 is either already equipped with a corresponding rotor roller 15 with an associated retainer 17 at a filling opening 13 of the press housing 10 or these components can be designed as a retrofit kit in order to be arranged at the filling opening 13 of an already existing baler 100. The combination of the rotor roller 15 and the retainer 17 at the filling opening 13 of a baler 100 is also referred to as a pressed material feed device 200.

Reference symbol list

10

Press chamber

11

Press housing

12

Press sign

13

Filling opening

14

Pressed material

15

Rotor roller

16

Rotor tooth (of 15)

17

Retainer

18

Jetty (of 17)

19

Filling space

20

Slider (in 19)

21

Feather

22

Jetty (of 17)

23

Filling channel

24

guide surface

25

Height (from 23)

26

Rotary axis (of 17)

27

end point

28

orbit

29

Radius (of 28)

30

Rotary axis (of 15)

100

Baler

200

Pressed material feed device

A

Detail

b

Direction

D

Direction of rotation (of 15)

F

Spring force

H1

first height (of 23)

H2

second height (of 23)

H3

third height (of 23)

P

Pendulum movement (of 20)

P1

first position (out of 17)

P2

second position (out of 17)

P3

third position (of 17)

Claims (11)

Baler (100) comprising: - a press housing (11) surrounding a press chamber (10), - a press shield (12) that can be moved in the press housing (11), - a filling opening (13) for filling material to be pressed (14) into the press housing (11), - a rotatably drivable rotor roller (15) arranged on the filling opening (13) with rotor teeth (16) distributed on its circumference and along its longitudinal extent, which conveys the material to be pressed (14) into the filling opening (13), characterized,
in that a retainer (17) is arranged on the side of the filling opening (13) facing away from the press chamber (10), which together with the rotor roller (15) delimits a filling channel (23). Baler (100) according to claim 1, characterized in that the retainer (17) comprises webs (22) which are preferably arranged between spaced rotor teeth (16) as seen over a longitudinal extent of the rotor roller (15). Baler (100) according to claim 1 or 2, characterized in that the retainer (17) and / or its webs (22) can be moved relative to the filling opening (13) or the rotor roller (15) in a direction (B), preferably around a rotation axis (26) can be pivoted, so that a height (25) provided as a passage for the filling channel (23) can be varied. Baler (100) according to one of claims 1 to 3, characterized in that at least one spring (21) is provided on the retainer (17) and/or on its webs (22), by means of which the retainer (17) and/or the Webs (22) can be acted upon by a spring force (F). Baler (100) according to claim 4, characterized in that the spring force (F) exerted by the spring (21) is adjustable. Baler (100) according to one of claims 1 to 5, characterized in that teeth, profiles, barbs or the like are formed on the webs (22) and/or the retainer (17). Baler (100) according to one of claims 1 to 6, characterized in that the retainer (17) as a whole can be displaced, in particular manually, out of the filling opening (13) or a filling channel (23). Baler (100) according to one of claims 1 to 7, characterized in that the retainer (17) and/or its individual webs (22) are designed to be interchangeable. Baler (100) according to one of claims 1 to 8, characterized in that the retainer (17) is assigned a pressure or force sensor. Pressed material feed device (200) comprising a rotatable rotor roller (15) with rotor teeth (16) distributed on its circumference and along its longitudinal extent, which can be attached to a filling opening (13) of a bale press (100), the rotor roller (15) being a retainer (17) is assigned. Retrofit kit for a bale press (100) comprising a pressed material feed conveyor (200) according to claim 10.

Images