阅读说明：本技术 用于从回转式压机中排出压制品的排出装置 (Discharge device for discharging pressed products from a rotary press ) 是由 S·吕德曼 F·迈斯纳 于 2021-05-27 设计创作，主要内容包括：本发明涉及一种用于从回转式压机排出压制品的排出装置,所述排出装置包括输入通道以及第一排出通道和第二排出通道,所述输入通道能与回转式压机的用于在回转式压机中制造的压制品的出料装置连接,输入通道还包括设置在一方面输入通道与另一方面第一和第二排出通道之间的分向器,其中,分向器能在第一位置和第二位置之间调节,在所述第一位置中将压制品从输入通道导入到第一排出通道中,在所述第二位置中将压制品从输入通道导入到第二排出通道中,其中,并联于分向器设有压力平衡通道,通过所述压力平衡通道进行在一方面输入通道与另一方面第一和/或第二排出通道之间的压力平衡。本发明还涉及一种回转式压机。(The invention relates to a discharge device for discharging pressed articles from a rotary press, comprising an inlet channel and a first and a second discharge channel, the feed channel can be connected to a discharge device of the rotary press for the pressed products produced in the rotary press, the feed channel further comprising a diverter arranged between the feed channel on the one hand and the first and second discharge channels on the other hand, wherein the diverter is adjustable between a first position in which the pressure product is directed from the inlet passage into the first outlet passage and a second position in which the pressure product is directed from the inlet passage into the second outlet passage, in this case, pressure equalization channels are provided in parallel with the flow divider, through which pressure equalization takes place between the supply channel on the one hand and the first and/or second discharge channel on the other hand. The invention also relates to a rotary press.)

1. Discharge device for discharging pressed articles (48) from a rotary press, comprising an inlet channel (54) which can be connected to a discharge device (44) of the rotary press for pressed articles (48) produced in the rotary press, and a first discharge channel (56) and a second discharge channel (58), wherein the discharge device further comprises a diverter (62) which is arranged between the inlet channel (54) on the one hand and the first and second discharge channels (56, 58) on the other hand, wherein the diverter (62) can be adjusted between a first position in which a pressed article (48) is introduced from the inlet channel (54) into the first discharge channel (56) and a second position in which a pressed article (48) is introduced from the inlet channel (54) into the second discharge channel (58), characterized in that a pressure equalization channel (68) is provided parallel to the diverter (62), through which pressure equalization channel (68) a pressure equalization between the inlet channel (54) on the one hand and the first and/or second outlet channel (56, 58) on the other hand takes place.

2. The discharge device as claimed in claim 1, characterised in that the flow cross section of the pressure equalization channel (68) is at least 10% of the flow cross section of the inlet channel (54), preferably at least 25% of the flow cross section of the inlet channel (54), further preferably at least 50% of the flow cross section of the inlet channel (54), still further preferably at least 100% of the flow cross section of the inlet channel (54).

3. Discharge device according to one of the preceding claims, characterized in that the diverter (62) has a diverter element (66), in particular a diverter blade, which is pivotable between a first position and a second position.

4. Discharge device according to claim 3, characterized in that the diverting element (66) forms a section of the wall of the inlet channel (54) and/or of the first and/or second discharge channel (56, 58).

5. Discharge device according to one of the preceding claims, characterized in that the pressure equalization channel (68) is directly connected with the first discharge channel (56) and/or the second discharge channel (58).

6. The discharge device as recited in any one of claims 1 to 5, characterized in that the pressure equalization channel (68) is directly connected with the inlet channel (54).

7. Discharge device according to any of claims 1-5, characterised in that the pressure equalization channel (68) can be connected with the inlet channel (54) via the rotor of a rotary press or the press interior.

8. A rotary press having a rotor, wherein the rotor has upper and lower punch guides (18, 20) for upper and lower press punches (14, 16) and a die plate (10) between the punch guides (18, 20), wherein the press punches (14, 16) interact with receptacles (12) of the die plate (10), wherein the rotary press furthermore has at least one filling device (26) in which the receptacles (12) are filled with material to be pressed, wherein the rotary press furthermore has at least one pressure device (34) which interacts in operation with the upper press punches (14) and with the lower press punches (16) in order to press the material located in the receptacles (12) into a compact (48), and wherein the rotary press has a discharge device (44) for the compact (48) produced in the rotary press, characterized in that a discharge device (50) according to one of the preceding claims is additionally provided, the pressed product (48) produced in the rotary press being guided from the discharge device (44) into an inlet channel (54) of the discharge device (50).

9. The rotary press according to claim 8, characterised in that the pressed product (48) is conveyed from the receptacle (12) onto the die plate (10) by the lower press ram (16) before reaching the discharge device (44).

10. The rotary press according to one of claims 8 or 9, wherein the discharge device (44) comprises a scraping device (46) for scraping the pressed product (48) from the die plate (10) into the feed channel (54) of the discharge device (50).

11. The rotary press according to one of claims 8 to 10, characterised in that it comprises a housing (53) surrounding the rotor and the discharge device (50).

12. The rotary press according to claim 11, wherein the interior of the housing (53) is under overpressure or underpressure relative to the discharge channels (56, 58).

13. The rotary press according to one of claims 11 or 12, wherein the housing (53) is sealed off from the surroundings.

Technical Field

The invention relates to a secondary rotary pressDischarge device for discharging pressed articles, and method for manufacturing the sameThe discharge device comprises an inlet channel, which can be connected to a discharge device of the rotary press for pressed products produced in the rotary press, and a first discharge channel and a second discharge channel, wherein the discharge device further comprises a diverter arranged between the inlet channel on the one hand and the first and second discharge channels on the other hand, wherein the diverter is adjustable between a first position, in which a pressed product is introduced from the inlet channel into the first discharge channel, and a second position, in which a pressed product is introduced from the inlet channel into the second discharge channel.

The invention further relates to a rotary press having a rotor, wherein the rotor has an upper punch guide and a lower punch guide for an upper press punch and a lower press punch and a die plate between the punch guides, wherein each press punch interacts with a receptacle of the die plate, wherein the rotary press further has at least one filling device, in which a material to be pressed is filled into the receptacle, wherein the rotary press further has at least one pressure device, which interacts in operation with the upper press punch and with the lower press punch in order to press the material located in the receptacle into a compact, and wherein the rotary press has a discharge device for the compact produced in the rotary press.

Background

Rotary presses comprise a rotor which is driven in rotation, usually about a vertical axis, with upper and lower punch guides for upper and lower press punches and a die plate between the punch guides. Each press punch rotates with the die plate and is moved axially during the rotation of the press punch, for example by a control cam. Such a rotary press comprises a discharge device in addition to at least one filling device, in which the material to be pressed is filled into the receptacles of the die plate, and a pressing device, in which the material filled into the receptacles is pressed by means of a top press punch and a bottom press punch into a pressed product, in particular a tablet. Known outfeed devices typically include scraping devices for scraping from the die plate the compact that was previously conveyed onto the upper side of the die plate, typically by raising a lower punch. In the known rotary presses, a discharge device is usually provided downstream of the discharge device for discharging the pressed product from the rotary press. This discharge device has an inlet channel into which the pressed product scraped off from the die plate by the scraping device is introduced. The discharge device usually has a slope, so that the pressed product is conveyed through the discharge device under the influence of gravity. It is also known to provide a diverter in the discharge device, which diverter can be adjusted between two positions, and which directs the pressure product introduced into the feed channel into the first discharge channel or the second discharge channel depending on the position of the diverter. One of the discharge channels may be, for example, a good channel for good tablets, while another of the discharge channels may be a bad channel for bad tablets. For example, it is also conceivable for one of the outlet channels to be a sample row channel for a sample row of the pressed product, for example for a sample check. A discharge device with such a diverter is known, for example, from DE 102007015672B 3. The diverter here comprises a diverting element which is pivotably supported about an axis.

The control of such a diverter is usually effected by means of predetermined terminal positions, which represent two switching positions of the diverter. The position of the terminal that has not been reached can be detected by means of a sensor and a corresponding fault report can be issued. Known rotary presses usually have a housing enclosing the rotor and the discharge device. A pressure difference may exist between the housing and the surroundings of the housing. In particular, the interior of the housing can be under overpressure or underpressure with respect to the discharge channel. This is the case in particular in so-called hermetic presses (Containment-pressure), in which the housing is hermetically closed with respect to the surroundings, in order to minimize the escape of dust from the interior of the housing into the surroundings.

It has been found that, in such rotary presses, the diverter does not always reliably reach its intended end position. This leads to malfunctions and thus reduced machine availability, so that unmanned operation and correspondingly also production can only be realized to a limited extent. A diverter failure, for example, may result in a sample column of the laminate not being realized in the desired manner. In the worst case, diverter failure may result in poor tablets reaching the exit for good tablets. The tablets in the outlet for good tablets must then be re-tested and sorted in a cost-effective manner with 100% testing. If not realized or meaningless, it may be necessary to completely destroy the manufactured tablets.

One attempt to solve this problem may be to design the drive for the regulating diverter stronger, in particular with a higher torque, or by using other drive types, for example pneumatic drives, in order to generate a higher torque in this way. However, this leads to further disadvantages. A stronger diverter drive may for example lead to damage of a tablet gripped by the diverter. Furthermore, even in stronger diverter drives, a failure may still occur in the way that the diverter reaches the end position. Finally, associated with stronger diverter drives are higher costs, higher energy consumption and greater installation space requirements, which are critical in particular in smaller rotary presses. Furthermore, due to the increased power requirements, increased exotherms occur in the tablet flow, which is severe in particular in thermolabile compacts. In this respect, the optionally high energy requirement for holding the diverter in the respective end position is also problematic in stronger diverter drives.

Disclosure of Invention

Based on the prior art described, the object of the invention is to provide a discharge device and a rotary press of the type mentioned at the outset, with which reliable operation of the diverter of the discharge device can be achieved, in particular even in the case of a closed press, without the need for a stronger diverter drive.

The invention achieves said object by means of the measures of claims 1 and 8. Advantageous embodiments emerge from the dependent claims, the description and the drawings.

In a discharge device of the type mentioned at the outset, the invention achieves this object by providing, parallel to the diverter, a pressure equalization channel, by means of which a pressure equalization between the feed channel on the one hand and the first and/or second discharge channel on the other hand takes place.

The compacts produced in the rotary press can be tablets in particular. Accordingly, the rotary press can be, in particular, a rotary tablet press. The pressed product produced in the rotary press emerges from the discharge of the rotary press into an inlet channel of the discharge device, which channel is connected to the discharge device. The discharge device can comprise in a manner known per se a scraping device which scrapes the pressed product from the upper side of the die plate of the rotor of the rotary press into the feed channel. As mentioned at the outset, the discharge device can have a slope, so that the pressure product introduced into the feed channel is conveyed by the discharge device under the influence of gravity. The first discharge channel of the discharge device may lead to a first outlet of the rotary press, while the second discharge channel may lead to a second outlet of the rotary press. The first outlet of the rotary press can be, for example, an outlet for good compacts, in particular good tablets, i.e. compacts which are recognized by the sensor system as being in accordance with the specification. The second outlet can be, for example, an outlet for a differential pressure product, in particular a differential tablet, i.e. for a compression product which is identified as defective by the sensor. However, it is also possible, for example, for one of the outlets to be an outlet for a sample column, i.e. for sampling the pressed product.

The invention is based on the recognition that, when the diverter is adjusted between its positions, in certain cases significant pressure differences can occur and thus the respective end position is not reached. The invention is based on the recognition that the diverter diverts the pressure and thus also the gas flow from one discharge channel into the other discharge channel. As a result of the opening and closing of the individual discharge channels, a pressure difference is created across the diverter. This relates in particular to: the housing of a rotary press equipped with a discharge device has a pressure difference, in particular under overpressure or underpressure, relative to the surroundings or relative to the discharge channel, for example, generated by suitable suction; or the housing is sealed off from the surroundings, as is the case in a closed press. The pressure difference which develops across the diverter leads to a torque acting on the diverter which, in unfavorable cases, can prevent the diverter from reaching the desired end position. In closed installations, it is also the case that the peripheral devices connected to the rotary press, such as dust-extraction devices or other peripheral devices, have their own suction devices. Depending on the regulation of such a suction device compared to a suction device of a rotary press for generating a negative pressure in the press interior, a pressure difference can also occur in the diverter.

In order to solve this problem, according to the invention, pressure equalization channels are provided in parallel to the diverter. Pressure equalization between the supply channel on the one hand and the first and/or second discharge channel on the other hand takes place via the pressure equalization channel, in particular in the diverter position closing the respective discharge channel. Depending on the position of the diverter, a pressure equalization between the inlet channel and one or both of the outlet channels can be achieved. The pressure difference over the diverter is at least reduced by the pressure equalization channel. Complete pressure equalization can also be achieved. However, this is not generally necessary. Rather, it is already possible to ensure that the end position of the diverter is reliably reached with the usual diverter drives by partial pressure equalization and a corresponding reduction of the pressure difference associated therewith. In the case of small pressure differences, therefore, a correspondingly small drive torque for the diverter is sufficient to reliably switch the diverter. The pressure compensation channel can be permanently open here. That is, the pressure equalization passage need not have a pressure equalization valve or the like. Furthermore, since the evacuation device can also be located in a region closed off from the surroundings by the housing of the rotary press or in a region which is under overpressure or underpressure, the pressure equalization and the air flow in the evacuation device or in the housing of the rotary press are not critical in maintaining the overpressure or underpressure or the closure. It should also be noted that the diverter normally closes, although not completely sealingly, the inlet of the respective blocked discharge channel in its respective end position. However, the air flow still possible at the diverter in the respective end position is not sufficient by itself to avoid a pressure difference which is disadvantageous for reaching the end position, in particular not to reduce it sufficiently quickly when adjusting the diverter. This problem is solved by the pressure compensation channel according to the invention in such a way that it enables an air flow parallel to the diverter and thus a pressure difference over the diverter is significantly reduced. The pressure difference that may remain is defined by the cross section of the pressure equalization channel and the resulting flow velocity. The residual pressure difference can be reduced in a desired manner by corresponding dimensioning of the pressure compensation channels, so that the adjustment of the diverter into the end position is not impeded. The flow cross section of the pressure equalization channel can accordingly be at least 10% of the flow cross section of the feed channel, preferably at least 25% of the flow cross section of the feed channel, more preferably at least 50% of the flow cross section of the feed channel, and even more preferably at least 100% of the flow cross section of the feed channel.

The invention ensures that the end position is reliably reached with the usual drive torque for the diverter even in the presence of excess pressure or negative pressure in the housing of the press. A solution is therefore also provided for dust-tight or closed rotary presses, which is of great importance due to increasingly stringent limit values. Disadvantages associated with stronger diverter drives, such as possible damage to the laminate when switching diverters, increased costs, increased installation space and increased energy requirements and increased heat release, are avoided.

It goes without saying that the discharge device can also comprise more than one feed channel. If necessary, then, of the plurality of input channels, for example, only one of the individual input channels can open into the diverter. The further feed channel can, for example, lead directly to the outlet of the rotary press or to a further diverter. The discharge device of the rotary press can comprise, in a manner known per se, a sorting device by means of which the pressed articles produced in the rotary press are sorted, for example, into further feed channels before reaching the feed channel of the discharge device to the diverter. Such a sorting device may, for example, comprise, in a manner known per se, sorting nozzles, by means of which, for example, a pressed product identified as bad by the sensor arrangement is sorted into a further feed channel before reaching the feed channel connected to the diverter. The discharge means may also comprise further discharge channels. The discharge means may for example comprise a third discharge channel, which is for example arranged downstream of the second discharge channel. Thus, for example, a further diverter can be provided upstream of the third discharge channel, which can be adjusted between two positions and which, depending on the position, leaves the pressure product in the second discharge channel or leads out of the second discharge channel into the third discharge channel. In principle, any number of supply channels and any number of discharge channels can be provided. If there are multiple diverters, pressure equalization channels may be provided in parallel to one or more of the diverters or in parallel to each of the diverters. As has also already been explained, the individual discharge channels can open into the outlet of the rotary press, for example into the outlet for a good product, into the outlet for a differential pressure product and into at least one outlet for a sample column.

According to one embodiment, the diverter can have a diverter element, in particular a diverter blade, which can be pivoted between a first position and a second position. The deflecting element, in particular a deflecting blade, which may be embodied as a deflecting plate, deflects the pressure product, which is pushed out of the discharge device of the rotary press into the feed channel, into the first discharge channel or into the second discharge channel depending on the pivot position. The pivot axis of the diverter element may extend substantially perpendicular to the longitudinal extension of the inlet channel or the first and second outlet channels.

The directional element may form a section of the wall of the inlet channel and/or the first outlet channel and/or the second outlet channel. Depending on the position, the branching element can form part of the wall of the first discharge channel or of the second discharge channel.

According to a further embodiment, the pressure compensation channel can be directly connected to the first outlet channel and/or the second outlet channel.

Furthermore, the pressure equalization channel can be connected directly to the supply channel. However, it is also conceivable for the pressure compensation channel to be connected indirectly to the supply channel, for example via the rotor of a rotary press or the press space.

The invention also achieves the object by means of a rotary press of the type mentioned at the outset, wherein a discharge device according to the invention is also provided, and the pressed product produced in the rotary press is guided from the discharge device into the feed channel of the discharge device.

The rotary press according to the invention can in principle be designed in a manner known per se. The rotary press comprises a so-called die plate with a plurality of receptacles in which the material to be pressed, usually in powder form, is pressed. The receptacle can be formed by a hole of the die plate, with which the press punch interacts directly. However, it is also possible to provide so-called tool sleeves in the bores of the tool plates, which form the receptacles. The mold plate can be formed in one piece or from mold segments. The rotor is driven in rotation about a vertical axis, for example, by a rotary drive. The compacts produced using a rotary press may be tablets. The rotary press is equipped with a discharge device according to the invention.

According to one embodiment, the pressed product can be transferred from the receptacle to the die plate by means of the punch of the lower press before it reaches the discharge device. The pusher punch is moved axially upward by a lower punch guide and, if necessary, a control element, such as a cam element, before reaching the discharge device, so that the pusher punch pushes the compact located in the receptacle upward onto the upper side of the die plate.

The discharge device may comprise a scraping device for scraping the pressed product from the die plate into the feed channel of the discharge device. The scraping device can, for example, comprise a stationary scraping element, for example in the shape of a sickle, under which the mould plate rotates. The pressed product conveyed onto the die plate is then scraped into the feed channel by means of a scraping element.

According to a further embodiment, the rotary press can comprise a housing which encloses the rotor and the discharge device. The interior of the housing may be under overpressure or underpressure with respect to the surroundings of the housing or the discharge channel. The overflow of dust from the interior of the rotary press is minimized by the generation of a corresponding underpressure. Such a negative pressure is present in particular in so-called closed presses. However, if an overpressure or underpressure is required, for example in order to extract excess product, it may be desirable even in non-hermetic presses.

According to a further embodiment, the housing can be sealed off from the surroundings. Thus, the rotary press may be an internal press. The sealed closure of the housing with respect to the surroundings reduces spillage of dust. The rotary press can be closed or highly closed, for example, according to the SMEPAC standard. The rotary press can, for example, at least satisfy OEB class 3. However, the rotary press can also, for example, satisfy the OEB class 4 or 5.

Drawings

Embodiments of the invention are explained in more detail below with the aid of the figures. In the figure:

figure 1 shows a rotary press according to the invention in an expanded view of the rotor,

fig. 2 shows a detail of a discharge device according to the invention for discharging a pressed product from the rotary press shown in fig. 1, which discharge device is in a first operating position,

figure 3 shows the discharge device of figure 2 in a second operating position,

fig. 4 shows a discharge device according to a further embodiment of the invention for discharging a pressed product from the rotary press shown in fig. 1, and

fig. 5 shows a discharge device according to a further embodiment of the invention for discharging a pressed product from the rotary press shown in fig. 1.

Detailed Description

The same reference numerals denote the same objects in the drawings unless otherwise specified.

The rotary press shown in fig. 1, in particular a rotary tablet press, comprises a rotor which is driven in rotation by a rotary drive and which has a die plate 10 with a plurality of receptacles 12. The receptacle 12 may be formed, for example, by a hole in the die plate 10. Furthermore, the rotor comprises a plurality of upper punches 14 and lower punches 16 which are synchronously encircled with the die plate 10. The upper punch 14 is axially guided in an upper punch guide 18, while the lower punch 16 is axially guided in a lower punch guide 20. The axial movement of the upper punch 14 and the lower punch 16 during rotation of the rotor is controlled by an upper control cam element 22 and a lower control cam element 24. The rotary press also comprises a filling device 26 with a filling reservoir 28 and a filling chamber 30, which are connected by a transfer section 32. In this way, in the present exemplary embodiment, the powdered filling material passes from the filling reservoir 28 via the conveying section 32 into the filling chamber 30 under the influence of gravity and from there via a filling opening provided on the underside of the filling chamber 30 into the receptacle 12 of the mold plate 10 again under the influence of gravity.

Furthermore, the rotary press comprises a pressure device 34. The press 34 comprises a prepressing device with an upper prepress roll 36 and a lower prepress roll 38 and a main press device with an upper main press roll 40 and a lower main press roll 42. Furthermore, the rotary press comprises a discharge device 44 and a scraping device 46 of the discharge device 44 with scraping elements which feed the pressed product 48 produced in the rotary press, in particular tablets, to a discharge device 50 for discharging the pressed product from the rotary press. The scraping device 46 can, for example, comprise a preferably sickle-shaped scraping element 46, which scrapes the product 48 conveyed by the lower punch 16 onto the upper side of the die plate 10 from the die plate 10 in the region of the discharge device 44 and conveys it to a discharge device 50.

The rotary press furthermore has a control device 52 for controlling its operation. The control device 52 is also connected to the rotary drive of the rotor via lines, not shown in detail, and controls the rotary press in operation. Furthermore, the control device can be connected to possible sensors of the rotary press, in particular to receive possible sensor data and use them as a basis for the control. For the control, the control device 52 can be connected to all components of the rotary press to be controlled via corresponding lines.

Furthermore, the rotary press is arranged in a housing 53, which is shown in dashed lines in fig. 1. In particular, the rotor of the rotary press and the discharge device 50 are arranged in a housing 53. The housing 53 can be under overpressure or underpressure relative to the surroundings of the housing 53 or relative to the discharge channels 56, 58. Furthermore, the housing 53 can be sealed off from the surroundings. The rotary press may be a so-called closed press.

The discharge device 50 of the rotary press is explained in more detail with reference to fig. 2 and 3. The discharge device 50 has an inlet channel 54, to which the pressed product 48 scraped off from the die plate 10 by the scraping device 46 is normally fed. The discharge device 50 furthermore has a first discharge channel 56 and a second discharge channel 58. The first discharge channel 56 opens into a first outlet for the pressed product produced in the rotary press, while the second discharge channel 58 opens into a second outlet for the pressed product produced in the rotary press. The first outlet connected to the first discharge duct 56 can be, for example, an outlet for a differential pressure product, which is identified as defective, for example, by a sensor of the rotary press. The second outlet connected to the second discharge channel 58 may be, for example, an outlet for good products that meet predetermined specifications. The discharge device 50 furthermore has a further supply channel 60, which is connected directly to the first discharge channel 56 and thus to a first outlet of the rotary press, for example for differential pressure products. The scraping device 46 can comprise, for example, a sorting device comprising sorting nozzles, with which the pressed articles identified as bad are already sorted into the further feed channel 60 before reaching the feed channel 54, so that the pressed articles identified as bad continue through the first discharge channel 56 into the first outlet of the rotary press, for example for differential pressure products. In principle, the discharge device 50 can have a slope, so that a pressed product fed into one of the feed channels 54, 60 is fed through it under the influence of gravity.

Between the inlet channel 54 and the first and second outlet channels 56, 58 there is also a diverter 62 having a diverter element 66 which is pivotally adjustable about a pivot axis 64 between a first position shown in fig. 2 and a second position shown in fig. 3. The deflecting element 66 can be designed, for example, as a so-called deflecting blade (Weichenfahne), for example in the form of a deflecting plate. In the first position shown in fig. 2, the pressed product conveyed into the feed channel 54 is conveyed to the first discharge channel 56 and thus to the first outlet of the rotary press. While in the second position shown in fig. 3 the pressed product is conveyed to the second discharge channel 58 and thus to the second outlet of the rotary press. The diverter 62 comprises a corresponding pivot drive for adjusting the diverter element 66 between the end positions shown in fig. 2 and 3. The branching element 66 here forms a section of the wall of the inlet channel 54 and, depending on the position, a section of the wall of the first and/or second outlet channel 56, 58. Furthermore, in the example shown, parallel to the diverter 62, a permanently open pressure equalization channel 68 is provided, through which a pressure equalization between the inlet channel 54 on the one hand and the first and/or second outlet channel 56, 58 on the other hand takes place. Here too, a pressure equalization takes place between the additional supply channel 60 and the first or second outlet channel 56, 58. In particular, the pressure compensation channel 68 is indirectly connected to the supply channels 54, 60 via the rotor of the rotary press or the press interior. On the other hand, the pressure equalizing passage 68 is directly connected to the second discharge passage 58. In particular, when the diverter element 66 is moved between the positions shown in fig. 2 and 3, an air flow can be provided via the pressure compensation duct 68, which reduces the pressure difference over the diverter 62 at least to such an extent that the diverter element 66 safely and reliably reaches its respective end position without a larger-sized drive being necessary.

In the example shown, the discharge device 50 also comprises a third discharge channel 70 which leads to a third outlet for the pressed product of the rotary press, in particular to an outlet for the sample column, i.e. to the pressed product to be fed to the sampling test. In the example shown, between the second outlet channel 58 and the third outlet channel 70, a further diverter 72 is present, which likewise has a diverter element 76, for example a further diverter blade, which is pivotable about a pivot axis 74. The further diverter 72 is shown in one of its two positions or end positions in fig. 2 and 3. In this position, the pressed product introduced into the second discharge channel 58 rests in this second discharge channel and reaches the second outlet of the rotary press. By switching the second diverter 72 into its second position, in which its free end abuts against an intermediate wall between the first and second discharge channels 56, 58, the pressure introduced into the second discharge channel 58 can be introduced from the second discharge channel into the third discharge channel 70 and thus into the third outlet of the rotary press.

Fig. 4 and 5 show a further exemplary embodiment of a discharge device according to the invention. In the exemplary embodiment according to fig. 4, the pressure compensation duct 68 is connected directly to the inlet duct 54 on the one hand and to the first outlet duct 56 on the other hand. Which accordingly ensures pressure equalization between the inlet channel 54 and the first outlet channel 56. In the exemplary embodiment shown in fig. 5, the pressure compensation duct 68 is connected directly to the inlet duct 54 on the one hand and to the second outlet duct 58 on the other hand. Which accordingly ensures pressure equalization between the inlet channel 54 and the second outlet channel 58. Furthermore, the discharge device according to fig. 4 and 5 can be constructed or integrated into a rotary press according to the above-described embodiment according to fig. 1 to 3. As explained above with regard to fig. 1 to 3, the outlet device according to fig. 4 and 5 may also have, for example, a further diverter 72 and a third outlet duct 70.

List of reference numerals

10 mould plate

12 accommodating part

14 upper punch

16 lower punch

18 upper punch guide

20 lower punch guide

22 control cam element

24 lower control cam element

26 filling device

28 filling reservoir

30 filling chamber

32 conveying part

34 pressure device

36 upper prepressing roll

38 lower prepressing roll

40 upper main press roll

42 lower main press roll

44 discharging device

46 scraping device

48 pressed articles

50 discharge device

52 control device

53 casing

54 input channel

56 first discharge passage

58 second discharge passage

60 additional discharge passages

62 direction divider

64 pivoting shaft

66-direction element

68 pressure balance channel

70 third discharge passage

72 additional direction dividers

74 pivoting shaft

76 direction dividing element