Rotary press

Abstract

To provide a rotary press machine capable of surely conveying pellets to a first pellet outlet at all times while saving space and resources SOLUTION: The rotary press comprises a removal device for removing the pellets ejected by the lower pressure punch onto the upper side of the die plate after pressing, wherein the removal device has a removal channel arranged at least partially above the die plate, so that the pellets ejected by the lower pressure punch from the cavity onto the upper side of the die plate are guided along the removal channel from the die plate to a first pellet outlet.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a rotary press having a rotor rotatable by a rotary drive, the rotor having an upper punch guide for an upper pressure punch, a lower punch guide for a lower pressure punch, and a die plate arranged between the punch guides, the pressure punch interacting with a cavity in the die plate; the rotary press further comprising a filling device by which a powder material to be pressed is filled into the cavity in the die plate; the rotary press further comprising a pressure device having an upper pressure unit and a lower pressure unit, which, during operation, interacts with the upper pressure punch and the lower pressure punch to press the powder material in the cavity in the die plate to form pellets; and the rotary press further comprises a removal device for removing pellets ejected by the lower pressure punch onto the upper surface of the die plate after pressing, the removal device having a removal channel arranged at least partially above the die plate, so that the pellets ejected by the lower pressure punch from the cavity onto the upper surface of the die plate are guided along the removal channel from the die plate to a first pellet outlet.

[0002] A rotary press typically has multiple upper and lower punches, each paired and assigned to one cavity of a die plate. During operation, the upper and lower punches rotate with the die plate, their axial movement controlled by a control cam and guided by upper and lower punch guides. As the die plate rotates, it passes through various devices, including a filling device and a pressure device. In the filling device, the powder material to be pressed is introduced into the cavity of the die plate. In the pressure device, the upper and lower punches are typically pressed into the cavity by upper and lower pressure rollers to compress the powder material into pellets, such as tablets. After the pressure device, the upper punch is guided upward from the cavity, and the pellets produced in the cavity are pressed onto the upper surface of the die plate by the lower punch. Such rotary presses also include a removal device for removing the pellets ejected by the lower punch onto the upper surface of the die plate after pressing. The removal device is disposed at least partially above the die plate and includes a removal channel that guides pellets discharged from the die plate rotating below the removal channel onto the upper surface of the die plate to a first pellet outlet, which may be, for example, an outlet for pellets determined to be non-defective.

[0003] In German Patent Nos. 10 2016 101 027 and 10 2016 101 028, a vacuum device is arranged in the good-product channel, adjacent to the remover. This vacuum device uses vacuum to eject (remove) tablets guided by the remover toward the good-product channel from the die plate and transport them through the good-product channel so that they can be smoothly transported to the first pellet outlet. In this way, it is possible to prevent tablets from being individually placed on the die plate and ensure their smooth removal. An air curtain can also be used to stabilize the tablets on the die plate. For this purpose, a constant air flow can be directed at the tablets, thereby pressing them against the die plate.

[0004] Although the described vacuum device reliably transports tablets from the good channel, under unfavorable conditions tablets can accumulate after they leave their respective cavities as soon as they are placed in the good channel, especially since they are vertically accelerated by the lower pressure punch during ejection. Removal devices with vacuum devices also require significant space in the rotary press and require large amounts of ejection air to ensure reliable tablet ejection, which is high in flow rate and therefore expensive, especially in the pharmaceutical field.

[0005] Based on the above-mentioned prior art, the present invention is therefore based on the object of providing a rotary press of the type mentioned at the beginning, which requires less space and resources and is capable of always reliably transporting pellets to the first pellet outlet.

[0006] The invention achieves this object by the subject matter of independent claim 1. Advantageous embodiments can be found in the independent claims, the description and the drawings.

[0007] In the case of a rotary press of the type mentioned at the outset, the invention achieves the object that the part of the removal channel arranged above the die plate has a vacuum device by means of which the pellets located on the die plate are sucked along the removal channel to the first pellet outlet.

[0008] The basic structure of the rotary press, the subject of this invention, is as described above. As described above, upper and lower punch guides guide the axially moving press punches. The punch heads interact with control cams, which move the press punches axially, particularly toward or away from each other, as they rotate with the rotor. The control cams are typically made of several control cam elements. The control cams can accommodate the punch heads in corresponding guide receptacles or be located solely on the mirror surfaces of the punch heads. The pressure devices typically include upper and lower pressure rollers, which interact with the respective punch heads of the upper and lower press punches. Several pressure devices of this type may be provided, such as a preload device and a main pressure device. The discharge cam, as part of the control cam, moves the lower press punch upward after the pellets are produced in the respective cavities, so that they reach the upper surface of the die plate and are transported from there to the first pellet outlet via the removal channel. The pellets may, in particular, be tablets. The rotary press may therefore also be a rotary tablet press. The tablets may, for example, be pharmaceutical tablets.

[0009] The removal channel may be, for example, sickle-shaped. It may have a first portion above the die plate and a second portion radially outward of the die plate. It is fixed relative to the rotor, particularly the die plate, so that the die plate rotates below the removal channel during operation of the rotary press. The removal channel may be positioned a short distance above the die plate. In particular, this distance is smaller than the thinnest pellet produced by the rotary press, so that all pellets are captured in the removal channel. As the die plate rotates, pellets ejected onto the upper surface of the die plate by the lower pressing punch after pressing are scraped out of the removal channel, particularly through the channel wall of the removal channel, and transported toward the first pellet outlet. As described above, the first pellet outlet may be, for example, a good-product outlet for pellets identified as good by a sensor in the rotary press.

[0010] According to the present invention, the portion of the removal channel located above the die plate includes a vacuum device, which sucks pellets located on the die plate along the removal channel to the first pellet outlet. According to the present invention, the vacuum device is integrated into the removal channel, particularly the portion of the removal channel located above the die plate. Therefore, the vacuum device is located near the discharge point where the pellets are extruded from the cavities to the upper surface of the die plate by the lower pressure punch. In this way, the pellets are stabilized at a very early stage, especially immediately after leaving the respective cavities, by the gas flow, particularly the air flow, generated by the vacuum device, and accelerated along the removal channel toward the first pellet outlet. This ensures reliable transport of the tablets through the removal channel and reliably prevents tablet jamming. At the same time, the vacuum device is located on or integrated into the removal channel in a compact and space-saving manner. Because the vacuum device is located in the removal channel, it needs to operate over a shorter distance than if it were located in the good product channel downstream of the removal channel. This requires less compressed gas or compressed air to operate the vacuum device, thereby saving resources.

[0011] According to one embodiment, a vacuum device may be arranged in the removal channel arranged above the die plate so that the ejection effect of the vacuum device is already generated on the pellets while they are being ejected from the cavities by the lower pressure punch. In this embodiment, the vacuum device is arranged in the removal channel so that the suction effect generated by the vacuum device on the pellets is already generated while they are still in the respective cavities during the ejection process by the lower pressure punch. In this embodiment, the vertical acceleration of the pellets from the cavities caused by the lower pressure punch is superimposed and deflected by the suction effect generated by the vacuum device, thereby stabilizing the movement of the pellets. This makes it possible to particularly reliably prevent the pellets from stacking and overlapping each other while they are being ejected from the cavities.

[0012] According to a further embodiment, a vacuum device may be disposed in the removal channel above the die plate so that the air flow generated by the vacuum device flows through the pellets ejected from the cavity by the lower pressure punch. By disposing the vacuum device in the removal channel above the die plate, the suction effect generated by the vacuum device can be particularly effective in flowing through the pellets on the die plate. In addition to the suction force parallel to the floor of the die plate or the removal channel in the direction of the first pellet outlet, this flow also generates a force component directed vertically upward. The combination of these forces acting on the pellets ensures that they are transported particularly evenly and smoothly across the surface.

[0013] According to a further embodiment, the vacuum device may have a vacuum nozzle integrated into the outlet channel located above the die plate. The vacuum nozzle can generate the desired suction effect, preferably by utilizing the Venturi effect. The vacuum nozzle can blow compressed gas, e.g., compressed air, in the desired direction of pellet movement to generate a vacuum that transports the pellets in this direction. The vacuum nozzle generates a suction effect in the direction of pellet movement toward the first pellet outlet. This embodiment allows for particularly efficient pellet transport.

[0014] According to a further embodiment, a vacuum nozzle integrated into the portion of the removal channel arranged above the die plate may be positioned above and / or near the pellet discharge point when the pellet is discharged from the cavity by the lower pressure punch. By positioning the vacuum nozzle above and / or near the pellet discharge point when the pellet is discharged from the cavity, the vertical acceleration of the pellet is advantageously deflected and stabilized by the suction effect during the discharge process, as explained above. Furthermore, by positioning it at or near the discharge point, it is possible to further reduce the amount of compressed gas or, respectively, the amount of compressed air required compared to the prior art.

[0015] According to a further embodiment, the removal channel may have a first channel wall that guides the pellets to the first pellet outlet and a channel ceiling that at least partially covers the removal channel, and vacuum nozzles may be arranged on the first channel wall and the channel ceiling. The removal channel may also have a second channel wall opposite the first channel wall, and vacuum nozzles may also be arranged on the second channel wall. The first channel wall, channel ceiling, and second channel wall may form a U-shape. They may be molded in one piece or in several parts. The aforementioned annular arrangement of vacuum nozzles around the pellet transport space defined by the removal channel provides a particularly uniform and effective suction effect on the pellets in the direction of movement toward the pellet outlet. Opposite the channel ceiling, the removal channel is open, particularly in the region of the portion located above the die plate, so that the space defined by the removal channel is defined below by the surface of the die plate, at least in the region of the portion located above the die plate. On the other hand, some of the removal channels arranged radially outward of the die plate may have a channel floor facing the channel ceiling to guide the pellets.

[0016] According to a further embodiment, each vacuum nozzle may have an elongated nozzle section extending in the pellet conveying direction toward the first pellet outlet, through which compressed gas, in particular compressed air, may be guided by a vacuum device. The elongated section may be straight or curved. In this way, the Venturi effect, which can be utilized for the suction effect described above, is particularly effectively utilized.

[0017] According to further embodiments, the vacuum device may comprise a compressed gas supply device, in particular a compressed air supply device, for supplying the vacuum nozzle with compressed gas, in particular compressed air, the compressed gas supply device having a supply channel leading from the compressed gas supply to the vacuum nozzle along the removal channel. The supply channel may be integrated with the removal channel. These embodiments allow for a particularly compact and space-saving construction in that the supply channel of the compressed gas supply device runs parallel to the removal channel or is respectively integrated with the removal channel.

[0018] According to a further embodiment, a sorting device may also be provided for sorting pellets discharged from the cavity to a second pellet outlet located upstream of the first pellet outlet in the pellet conveying direction. The sorting device may include a sorting nozzle for sorting pellets to the second pellet outlet by compressed gas. The sorting nozzle may be supplied with compressed gas by a compressed gas supply, for example, via the supply channel or a separate supply channel. If a further supply channel is provided, it may run parallel to the removal channel or be integrated with the removal channel. The second pellet outlet may be a reject outlet for pellets identified as rejects by a sensor in the rotary press, for example, and is located upstream of the first pellet outlet in the pellet conveying direction. When the sorting device is not activated, pellets are conveyed through the removal channel past the second pellet outlet toward the first pellet outlet. On the other hand, when pellets are identified as rejects and should be sorted accordingly, the sorting device is activated. In particular, a blast of compressed gas, in particular compressed air, is applied to the pellets by the sorting nozzle transversely to their direction of movement, so that the pellets are deflected from their conveying path into a second pellet outlet. The first pellet outlet may, for example, lead to a good output for further processing of the produced pellets, while the second pellet outlet may lead to a reject output for rejected pellets. In the aforementioned embodiment, the compressed gas supply, which is in any case necessary for sorting by the sorting device, can advantageously be used at the same time to supply the vacuum device. This further simplifies the construction and saves space.

[0019] According to a further embodiment, the removal channel can extend to the sorting device. This means that a suction effect can be generated, especially near the discharge point where the pellets leave the cavity. Due to the additional channel length of the removal channel thus created, a vacuum is generated in the channel and thus also on the die plate. To achieve a particularly simple embodiment, a sorting nozzle can be integrated into the removal channel.

[0020] According to a further embodiment, a first detection device may be arranged at the first pellet outlet, detecting pellets guided through the first pellet outlet, and / or a second detection device may be arranged at the second pellet outlet, detecting pellets guided through the second pellet outlet. Pellets produced by the rotary press are selectively guided to either the first or second pellet outlet, particularly depending on whether the pellets are good or bad. As mentioned above, the second pellet outlet may be a reject outlet for pellets identified as bad by the rotary press sensor. The second pellet outlet may be, in particular, the second pellet outlet described above, and therefore, reference may be made to the above description.

[0021] In the aforementioned embodiment, a first detection device may be disposed at the first pellet outlet, and the first detection device detects pellets guided through the first pellet outlet. Furthermore, a second detection device may be disposed at the second pellet outlet, and the second detection device detects pellets guided through the second pellet outlet. In the prior art, detection of ejected pellets is performed by monitoring the pressure increase, particularly in the nozzle arrangement used to deliver the pellets. For example, blockage of the nozzle arrangements can result in false detection failures. This problem is overcome by the aforementioned embodiment. At the same time, ejected pellets can be detected redundantly.

[0022] By arranging detection devices at both the first and second pellet outlets, it is possible to directly detect ejected pellets conveyed through the second pellet outlet, which may be embodied as a reject channel, on the one hand. On the other hand, intervals corresponding to ejected rejected pellets may be detected in the pellet flow discharged through the first pellet outlet, which may be embodied as a good channel, on the other hand, ejected pellets may be indirectly detected. This ensures reliable redundant monitoring of pellet ejection. Detection failures due to blockage of the nozzle opening, for example, are eliminated.

[0023] The detection device can be, for example, a light barrier, in particular a tubular light barrier. A light barrier allows particularly reliable and accurate identification of the pellets and / or the spacing of the pellet flow. However, other sensors, for example capacitance sensors, can also be used as the detection device.

[0024] Exemplary embodiments of the invention are explained in more detail below on the basis of the figures. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a view showing the rotor of a rotary press according to the present invention in an expanded state; [Figure 2] FIG. 2 is a perspective view showing a portion of the rotary press machine of FIG. 1. [Figure 3] 1 is a top view of a removal channel of a rotary press according to the present invention; [Figure 4] FIG. 4 is a cross-sectional view taken along line BB in FIG. 3 . [Figure 5] 4 is a cross-sectional view taken along line CC in FIG. 3; [Figure 6] FIG. 1 illustrates the flow through tablets produced in a rotary press.

[0026] Unless otherwise specified, like reference numerals refer to like objects in the figures.

[0027] The rotary press shown in FIG. 1 is a rotary press for producing tablets, in which a powder material is compressed to form tablets. The rotor of the rotary press is driven to rotate by a rotary drive and includes a die plate 10 having a plurality of cavities 12. The cavities 12 may be formed, for example, by holes in the die plate 10. The rotor further includes a plurality of upper and lower pressure punches 14 and 16, which rotate synchronously with the die plate 10. The upper and lower pressure punches 14 and 16 are axially guided in an upper punch guide 18 and a lower punch guide 20, respectively. The axial movement of the upper and lower pressure punches 14 and 16 during rotor rotation is controlled by an upper control cam element 22 and a lower control cam element 24. A filling device 26 is also provided, which includes a filling reservoir 28 and a filling chamber 30, which are connected via a filling tube 32. Thus, in this embodiment, the powder material flows by gravity from the filling reservoir 28 through the filling tube 32 into the filling chamber 30, and from there, by gravity again, through a filling opening provided in the underside of the filling chamber 30 into the cavity 12 of the die plate 10.

[0028] The rotary press further includes a pressure device 34. The pressure device 34 includes a pre-pressure device having an upper pre-pressure roller 36 held in an upper holder 35 and a lower pre-pressure roller 38 held in a lower holder 37, and a main pressure device having an upper pressure roller 40 held in an upper holder 39 and a lower pressure roller 42 held in a lower holder 41. The rotary press further includes a removal device 44 having a removal channel 46. The removal channel removes tablets 48, which have been conveyed to the upper surface of the die plate 10 by the lower pressure punch 16, from the die plate 10 and conveys the tablets 48 through the removal channel 46 to a first pellet outlet 58. The removal channel 46 may be, for example, sickle-shaped, and will be described in more detail with reference to the following figures. The rotary press further includes a control device 52 that controls the operation of the rotary press.

[0029] In FIG. 2, only the die plate 10 with the cavities 12 and the removal channel 46 of the removal device 44 of the rotary press shown in FIG. 1 are shown for illustrative purposes. The removal channel 46 has a first portion 54 arranged above the die plate 10 and a second portion 56 arranged radially outside the die plate. The removal channel 46 leads to a first pellet outlet 58, through which, for example, tablets 48 identified as good can be discharged from the rotary press for further processing. During operation, the die plate 10 rotates counterclockwise, as indicated by arrow 60 in FIG. 2. A second pellet outlet 62 is arranged upstream of the first pellet outlet 58 in the direction of rotation of the die plate 10, and thus in the direction of conveyance of the tablets 48 to the removal channel 46. This second pellet outlet 62 allows tablets 48 identified as bad, for example by a sensor in the rotary press, to be fed as rejected to a reject outlet.

[0030] The structure of the removal device 44 according to the present invention will be explained in more detail with the aid of Figures 3 to 5. In the cross-sectional view of Figure 4, it can be seen that a supply channel 64 is connected to a pressure supply (not shown in detail) of a compressed gas supply device, via which compressed gas, in particular compressed air, is available to a vacuum nozzle of a vacuum device integrated into the removal channel 46, and that the supply channel 64 is arranged so as to be integrated into the removal channel. In the illustrated example, compressed air is supplied as compressed gas from the supply channel 64, which runs parallel to the transport path of the tablets 48 through the removal channel 46, via a cross-connection 66 to a U-shaped portion 68 of the removal channel 46. The U-shaped portion 68 is formed by a first channel wall 70, a second channel wall 72, and a channel ceiling 74. As can be seen particularly in Figure 5, this portion 68 opens into a number of vacuum nozzles 76, which are also arranged along the U-shape. The compressed air supplied through the supply channel 64 is directed through the U-shaped portion 68 to the vacuum nozzle 76, which then blows the compressed air in the desired direction of travel of the tablet 48 conveyed through the removal channel 46. This creates a suction effect on the tablet 48 being ejected from the cavity 12 by the lower pressure punch 16 while the tablet 48 is still at least partially within the cavity 12, even during the ejection process in this embodiment. As can be seen particularly in FIG. 5 , the removal channel 46 has an outlet chute portion 78 as a channel floor located radially outward of the die plate 10. Through this outlet chute portion 78, the tablet 48 conveyed by the suction effect of the vacuum device reaches the first pellet outlet 58 by gravity. FIG. 5 also shows that multiple vacuum nozzles 76 are disposed on each of the first and second channel walls 70 and 72, as well as the channel ceiling 74. Each vacuum nozzle 76 extends in the conveyance direction of the tablet 48 to the first pellet outlet 58 and may have an elongated nozzle portion through which compressed gas or compressed air is directed. On the other hand, in the portion 54 positioned above the die plate 10, the removal channel 46 has no floor, and therefore a space defined by the first and second channel walls 70, 72 and the channel ceiling 74 is formed on its underside by the die plate 10 rotating below the removal channel 46.

[0031] Also integrated into the removal channel 46 is a sorting nozzle 80, hidden in Figures 4 and 5 but shown diagrammatically in Figure 3, which is part of a sorting device for sorting tablets 48 identified as defective, for example by a sensor in the rotary press, into the second pellet outlet 62. A further supply channel 82 is connected to a compressed gas supply and is also integrated into the removal channel 46, supplying compressed gas, in particular compressed air, to the sorting nozzle 80. A short burst of compressed gas through the sorting nozzle 80 makes it possible to blow the tablets 48 identified as defective out of their conveying path into the second pellet outlet 62 in a targeted manner. As can be seen, the removal channel 46 extends to the sorting device, in particular the sorting nozzle 80. In particular, the sorting nozzle 80 is integrated into the removal channel 46 as explained.

[0032] As already explained, the vacuum device according to the invention, and in particular the vacuum nozzle 76, ensures that the extraction effect is already occurring on the tablets 48 during their ejection from the cavities 12 by the lower pressure punch 16. Furthermore, the design of the vacuum device, and in particular the arrangement of the vacuum nozzle 76, ensures that the air flow generated by the vacuum nozzle 76 flows over the tablets 48 that have been ejected from the cavities 12 by the lower pressure punch 16 and are positioned on the die plate 10.

[0033] An air flow 84 over the tablet 48 is shown in Figure 6. This flow exerts two force components on the tablet 48: one in the desired direction of movement of the tablet 48, as indicated by arrow 86, and the other vertically upwards, as indicated by arrow 88. In this way, a particularly reliable transport of the tablet 48 is ensured. [Explanation of symbols]

[0034] 10 Die Plate 12 cavities 14 Upper pressure punch 16 Lower pressure punch 18 Upper punch guide 20 Lower punch guide 22 Upper control cam element 24 Lower control cam element 26 Filling equipment 28 Filling reservoir 30 Filling chamber 32 filling tube 34 Pressure Equipment 35, 39 Upper holder 37, 41 Lower holder 36 Upper preload roller 38 Lower preload roller 40 Upper pressure roller 42 Lower pressure roller 44 Removal device 46 Rejection Channels 48 tablets, pellets 52 Control device 54 First Part 56 Second Part 60 Arrow 62 Second pellet outlet 64 Supply Channels 66 Cross-connection 68 parts 70 First Channel Wall 72 Second Channel Wall 74 Channel Ceiling 76 Vacuum nozzle 78 Exit chute 80 Sorting nozzle 82 Supply Channels 84 Airflow 86 Arrow 88 Arrow

Claims

1. A rotary press machine having a rotor rotatable by a rotary drive, the rotor having an upper punch guide (18) for an upper pressure punch (14), a lower punch guide (20) for a lower pressure punch (16), and a die plate (10) arranged between the upper punch guide (18) and the lower pressure punch (16), the upper pressure punch (14) and the lower pressure punch (16) interacting with a cavity (12) of the die plate (10), the rotary press machine further comprising a filling device (26) by means of which a powder material to be pressed is filled into the cavity (12) of the die plate (10), the rotary press machine further comprising a pressure device (34) having an upper pressure unit (40) and a lower pressure unit (42) which, during operation, interacts with the upper pressure punch (14) and the lower pressure punch (16) to press the powder material in the cavity (12) of the die plate (10). a pressure device (34) for pressing the lower pressure punch (16) to form pellets (48); the rotary press also includes a removal device (44) for removing pellets (48) ejected onto the upper surface of the die plate (10) by the lower pressure punch (16) after pressing, the removal device (44) having a removal channel (46) at least partially disposed above the die plate (10), such that the pellets (48) ejected from the cavity (12) onto the upper surface of the die plate (10) by the lower pressure punch (16) are guided along the removal channel (46) from the die plate (10) to a first pellet outlet (58), and a portion (54) of the removal channel (46) disposed above the die plate (10) has a vacuum device, which sucks the pellets (48) located on the die plate (10) along the removal channel (46) to the first pellet outlet (58).

2. 2. The rotary press according to claim 1, wherein the vacuum device is arranged in the portion (54) of the removal channel (46) arranged above the die plate (10) so that the ejection effect of the vacuum device occurs on the pellets (48) already during their ejection from the cavity (12) by the lower pressure punch (16).

3. 2. The rotary press according to claim 1, wherein the vacuum device is disposed in the portion (54) of the removal channel (46) disposed above the die plate (10) so that the air flow (84) generated by the vacuum device flows through the pellets (48) ejected from the cavity (12) by the lower pressure punch (16).

4. 2. The rotary press according to claim 1, wherein the vacuum device comprises a vacuum nozzle (76) integrated into the portion (54) of the removal channel (46) located above the die plate (10).

5. 5. The rotary press according to claim 4, characterized in that the vacuum nozzle (76) integrated in the portion (54) of the removal channel (46) arranged above the die plate (10) is arranged above and / or near the discharge point of the pellets (48) when the pellets are discharged from the cavity (12) by the lower pressure punch (16).

6. 5. The rotary press of claim 4, wherein the removal channel has a first channel wall that guides the pellets to the first pellet outlet and a channel ceiling that at least partially covers the removal channel, and the vacuum nozzles are disposed on the first channel wall and the channel ceiling.

7. 7. The rotary press of claim 6, wherein the removal channel (46) also has a second channel wall (72) opposite the first channel wall (70), and the vacuum nozzle (76) is also located on the second channel wall (72).

8. The rotary press of claim 7, wherein the first channel wall (70), the channel ceiling (74), and the second channel wall (72) form a U-shape.

9. 5. A rotary press according to claim 4, characterized in that the vacuum nozzles (76) each have an elongated nozzle portion extending in the conveying direction of the pellets (48) towards the first pellet outlet (58), and compressed gas, in particular compressed air, is guided through the elongated nozzle portion by the vacuum device.

10. 5. The rotary press according to claim 4, characterized in that the vacuum device comprises a compressed gas supply, in particular a compressed air supply, for supplying compressed gas, in particular compressed air, to the vacuum nozzle (76), the compressed gas supply having a supply channel (64) leading from a compressed gas supply to the vacuum nozzle (76) along the removal channel (46).

11. 11. A rotary press according to claim 10, characterized in that said supply channel (64) is integrated with said removal channel (46).

12. 2. The rotary press according to claim 1, further comprising a sorting device for sorting the pellets discharged from the cavity to a second pellet outlet arranged upstream of the first pellet outlet in a conveying direction of the pellets, the sorting device comprising a sorting nozzle for sorting the pellets to the second pellet outlet by compressed gas.

13. 13. A rotary press according to claim 12, characterized in that the screening nozzle (80) is also supplied with compressed gas by the compressed gas supply.

14. 13. A rotary press according to claim 12, characterized in that the removal channel (46) extends to the screening device.

15. 13. A rotary press according to claim 12, characterized in that the screening nozzle (80) is integrated into the removal channel (46).

16. 16. The rotary press according to claim 1, wherein a first detection device is arranged at the first pellet outlet (58), the first detection device detecting pellets (48) guided through the first pellet outlet (58), and / or a second detection device is arranged at the second pellet outlet (58), the second detection device detecting pellets (48) guided through the second pellet outlet (58).

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