Discharge device for discharging pressed products from a rotary press

Abstract

The present invention relates to a discharge device for discharging pressed products from a rotary press, the discharge device comprising an input channel and a first discharge channel and a second discharge channel, the input channel being connectable to a discharge device of the rotary press for pressed products manufactured in the rotary press, the input channel further comprising a divider arranged between the input channel on the one hand and the first and second discharge channels on the other hand, wherein the divider is adjustable between a first position and a second position, in the first position the pressed products are introduced from the input channel into the first discharge channel, and in the second position the pressed products are introduced from the input channel into the second discharge channel, wherein a pressure balancing channel is arranged in parallel with the divider, through which pressure balancing is performed between the input channel on the one hand and the first and / or second discharge channels on the other hand. The present invention also relates to a rotary press.

Description

Technical Field

[0001] The present invention relates to a rotary press A discharge device for discharging pressed products in a rotary press, the discharge device comprising an input channel and a first discharge channel and a second discharge channel, the input channel being connectable to a discharge device of a rotary press for pressed products manufactured in the rotary press, the discharge device further comprising a divider arranged between the input channel on the one hand and the first and second discharge channels on the other hand, wherein the divider is adjustable between a first position and a second position, in the first position the pressed products are introduced from the input channel into the first discharge channel, and in the second position the pressed products are introduced from the input channel into the second discharge channel.

[0002] The present invention also relates to a rotary press, which has 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 cooperates with a receiving portion of the die plate, and the rotary press also has at least one filling device, in which the material to be pressed is filled into the receiving portion, and the rotary press also has at least one pressure device, which cooperates with the upper press punch and the lower press punch during operation to press the material located in the receiving portion into a pressed product, and the rotary press has a discharge device for the pressed product manufactured in the rotary press. Background Art

[0003] The rotary press comprises a rotor which is usually driven to rotate around a vertical axis, and which has 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 moves axially during the rotation of the press punch, for example by controlling a cam. In addition to at least one filling device (in which the material to be pressed is filled into the receiving portion of the die plate) and a pressure device (in which the material filled into the receiving portion is pressed into a pressed product, especially a tablet, by means of an upper press punch and a lower press punch), such a rotary press also comprises a discharge device. Known discharge devices usually include a scraping device, which is used to scrape the pressed product from the die plate, which was previously conveyed to the upper side of the die plate by lifting the lower punch. In 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 input channel, into which the pressed products scraped from the die plate by the scraping device are introduced. The discharge device usually has a slope, so that the pressed products are conveyed through the discharge device under the action of gravity. In addition, it is known that a splitter that can be adjusted between two positions is provided in the discharge device, and the splitter guides the pressed products introduced into the input channel into the first discharge channel or the second discharge channel according to the position of the splitter. One of the discharge channels can be a good channel for good tablets, and the other of the discharge channels can be a bad channel for bad tablets. For example, it is also conceivable that one of the discharge channels is a sample column channel for a sample column of pressed products, for example for sampling inspection. A discharge device with such a splitter is known, for example, from DE 10 2007 015 672 B3. The splitter here includes a splitter element that can be pivotally supported around an axis.

[0004] The control of such a splitter is usually achieved via predetermined end positions, which represent two switching positions of the splitter. Failure to reach an end position can be detected by sensors and a corresponding fault message can be issued. Known rotary presses usually have a housing surrounding the rotor and the discharge device. There can be a pressure difference between the housing and the surroundings of the housing. In particular, the interior of the housing can be under overpressure or underpressure relative to the discharge channel. This is especially the case in so-called containment presses, where the housing is sealed against the surroundings in order to minimize the escape of dust from the interior of the housing into the surroundings.

[0005] It has been found that, in such rotary presses, the divider does not always reliably reach its predetermined end position. This leads to malfunctions and thus reduced machine availability, so that unmanned operation and correspondingly also production can only be achieved in a limited manner. A divider malfunction can, for example, result in a sample train of pressed products not being achieved in the desired manner. In the worst case, a divider malfunction can result in bad tablets arriving at the outlet for good tablets. The tablets at the outlet for good tablets must then be retested and sorted in a time-consuming manner by 100% testing. If this is not possible or does not make sense, the manufactured tablets may have to be completely destroyed.

[0006] An attempt to solve this problem can be to design the drive for regulating the splitter to be stronger, especially with higher torque or by using other drive types, for example pneumatic drive, so as to produce higher torque in this way. However, this leads to other shortcomings. Stronger splitter drive may for example cause the damage of the tablet clamped by the splitter. In addition, even in stronger splitter drive, still failure may occur in the splitter reaching the terminal position. Finally, what is associated with the stronger splitter drive is higher cost, higher energy consumption and larger structural space requirement, which is particularly critical in smaller rotary presses. In addition, due to the power demand that improves, the heat release that rises occurs in the tablet flow, which is particularly serious in heat-resistant pressed products. In this respect, in the stronger splitter drive, the high energy demand when necessary for the splitter to be maintained in the corresponding terminal position is also problematic. Summary of the invention

[0007] Based on the described prior art, the object of the present invention is to provide a discharge device and a rotary press of the type mentioned at the outset, with which a reliable operation of the divider of the discharge device can be achieved, in particular even in the case of a closed press, without the need for a more powerful divider drive.

[0008] To this end, the present invention proposes a discharge device for discharging pressed products from a rotary press, the discharge device comprising an input channel and a first discharge channel and a second discharge channel, the input channel being connectable to a discharge device of the rotary press for pressed products manufactured in the rotary press, the discharge device also comprising a divider arranged between the input channel on the one hand and the first and second discharge channels on the other hand, wherein the divider is adjustable between a first position and a second position, in the first position the pressed product is introduced from the input channel into the first discharge channel, and in the second position the pressed product is introduced from the input channel into the second discharge channel, wherein a permanently opened pressure balancing channel is provided in parallel with the divider, and pressure balancing is performed between the input channel on the one hand and the first and / or second discharge channels on the other hand through the pressure balancing channel.

[0009] The present invention also proposes a rotary press, which has 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, the press punch cooperates with the receiving portion of the die plate, the rotary press also has at least one filling device, in which the material to be pressed is filled into the receiving portion, the rotary press also has at least one pressure device, which cooperates with the upper press punch and the lower press punch during operation to press the material located in the receiving portion into a pressed product, and the rotary press has a discharge device for the pressed product manufactured in the rotary press, wherein a discharge device according to the present invention is also provided, and the pressed product manufactured in the rotary press is introduced from the discharge device into the input channel of the discharge device.

[0010] The invention achieves this object with a discharge device of the type mentioned at the outset in that a pressure equalization channel is provided in parallel with the divider, via 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.

[0011] The pressed products manufactured in the rotary press may be tablets in particular. Accordingly, the rotary press may be a rotary tablet press in particular. The pressed products manufactured in the rotary press come out of the discharge device of the rotary press and arrive in the input channel connected to the discharge device. The discharge device may include a scraping device in a known manner, which scrapes the pressed products from the upper side of the die plate of the rotor of the rotary press into the input channel. As described at the beginning, the discharge device may have a slope, so that the pressed products introduced into the input channel are conveyed through the discharge device under the action of gravity. The first discharge channel of the discharge device may lead to the first outlet of the rotary press, and the second discharge channel may lead to the second outlet of the rotary press. The first outlet of the rotary press may be, for example, an outlet for good pressed products, in particular good tablets, that is, for pressed products that are identified as meeting the regulations by the sensor mechanism. The second outlet may be, for example, an outlet for differentially pressed products, in particular poorly pressed tablets, that is, for pressed products that are identified as defective by the sensor mechanism. However, it is also possible, for example, for one of the outlets to be an outlet for the sample train, ie for sampling the pressed product.

[0012] The invention is based on the recognition that, when the splitter is adjusted between its positions, a significant pressure difference may occur under certain circumstances and thus lead to failure to reach the corresponding terminal position. In addition, the invention is based on the recognition that the reason for this is that the splitter diverts the pressed product and therefore also the air flow from one discharge channel to another discharge channel. Due to the opening and closing of the individual discharge channels, a pressure difference is formed on the splitter. This is particularly related to: the housing of the rotary press equipped with the discharge device has a pressure difference relative to the surrounding environment or relative to the discharge channel, for example, generated by appropriate suction, especially under overpressure or negative pressure; or the housing is sealed relative to the surrounding environment, as in the case of a closed press. The pressure difference formed on the splitter leads to a torque acting on the splitter, which torque may prevent the splitter from reaching the desired terminal position under unfavorable circumstances. In closed devices, the following situation also occurs, that is, peripheral equipment connected to the rotary press, such as dust removal equipment or other peripheral equipment, has its own suction device. Depending on the setting of such a suction device compared to the suction device of the rotary press for generating a negative pressure in the press interior, a pressure difference may also occur at the divider.

[0013] In order to solve this problem, according to the present invention, a pressure balancing channel is provided in parallel with the splitter. The pressure balancing channel is used to balance the pressure between the input channel on the one hand and the first and / or second discharge channel on the other hand, especially in the splitter position where the corresponding discharge channel is closed. Depending on the splitter position, a pressure balance between the input channel and one or both outlet channels can be achieved. The pressure difference on the splitter is at least reduced by the pressure balancing channel. Complete pressure balance can also be achieved. However, this is usually not necessary. More precisely, by partial pressure balance and the corresponding reduction of the pressure difference related thereto, it can be ensured that the terminal position of the splitter is reliably reached using a common splitter drive. Therefore, in the case of a small pressure difference, a correspondingly small driving torque for the splitter is sufficient to reliably switch the splitter. The pressure balancing channel can be permanently open here. That is, the pressure balancing channel does not need to have a pressure balancing valve or the like. In addition, because the discharge device can be located in the area closed by the housing of the rotary press relative to the surrounding environment or in the area under overpressure or negative pressure, the pressure balance and the air flow related thereto in the discharge device or in the housing of the rotary press are not critical in maintaining overpressure or negative pressure or sealing. It should also be noted that the splitter usually closes the inlet of the corresponding blocked discharge channel in an incompletely sealed manner in its corresponding terminal position. However, the air flow itself that is still possible on the splitter in the corresponding end position is not enough to avoid the pressure difference that is unfavorable for reaching the terminal position, especially when the splitter is adjusted, the pressure difference is not reduced quickly enough. This problem is solved by the pressure balance channel according to the present invention, in which the pressure balance channel can realize the air flow parallel to the splitter and significantly reduce the pressure difference on the splitter. The possible residual pressure difference is limited by the cross section of the pressure balance channel and the formed flow velocity. The residual pressure difference can be reduced in a desired manner by the corresponding size of the pressure balance channel, thereby not hindering the adjustment of the splitter to the terminal position. The flow cross section of the pressure equalization channel can accordingly be at least 10% of the flow cross section of the input channel, preferably at least 25% of the flow cross section of the input channel, further preferably at least 50% of the flow cross section of the input channel, and further preferably at least 100% of the flow cross section of the input channel.

[0014] The invention ensures that the end position is reliably reached with the usual drive torque for the splitter even in the case of an overpressure or underpressure in the housing of the press. Thus, a solution is also provided for dust-tight or sealed rotary presses, which is of great importance due to increasingly stringent limit values. The disadvantages associated with more powerful splitter drives, such as possible damage to the pressed product when switching the splitter, increased costs, increased installation space and increased energy requirements as well as increased heat release, are avoided.

[0015] It goes without saying that the discharge device can also include more than one input channel. Thus, if necessary, among multiple input channels, for example, only one of the input channels can lead to the divider. The other input channels can, for example, lead directly to the outlet of the rotary press or to another divider. The discharge device of the rotary press can include a sorting device in a manner known per se, by which the pressed products manufactured in the rotary press are sorted, for example, into another input channel before reaching the input channel of the discharge device leading to the divider. Such a sorting device can, for example, include a sorting nozzle in a manner known per se, by which the pressed products, for example, identified as poor by the sensor mechanism, are sorted into another input channel before reaching the input channel connected to the divider. The discharge device can also include another discharge channel. The discharge device can, for example, include a third discharge channel, which is, for example, arranged downstream of the second discharge channel. Thus, for example, an additional splitter can be provided upstream of the third discharge channel, which can be adjusted between two positions and which, depending on the position, allows the pressed product to remain in the second discharge channel or to be introduced from the second discharge channel into the third discharge channel. In principle, any number of input channels and any number of discharge channels can be provided. If a plurality of splitters are provided, a pressure balancing channel can be provided in parallel to one or more of the splitters or in parallel to each of the splitters. As has also been explained, each discharge channel can lead to an outlet of the rotary press, for example, to an outlet for good pressed products, to an outlet for differentially pressured products and to at least one outlet for a sample column.

[0016] According to one design, 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 diverter element, in particular the diverter blade, which can be configured as a diverter plate, deflects the pressed product pushed out of the discharge device of the rotary press into the input channel into the first discharge channel or the second discharge channel depending on the pivot position. The pivot axis of the diverter element can extend substantially perpendicularly to the longitudinal extension of the input channel or the first and second discharge channels.

[0017] The deflector element can form a section of a wall of the inlet channel and / or the first outlet channel and / or the second outlet channel. Depending on the position, the deflector element can form a part of a wall of either the first outlet channel or the second outlet channel.

[0018] According to another design solution, the pressure equalization channel may be directly connected to the first outlet channel and / or the second outlet channel.

[0019] Furthermore, the pressure compensation channel can be connected directly to the inlet channel. However, it is also conceivable that the pressure compensation channel is connected indirectly to the inlet channel, for example via the rotor or the press chamber of the rotary press.

[0020] The invention also achieves this object by a rotary press of the type mentioned at the outset, wherein a discharge device according to the invention is also provided and the pressed products produced in the rotary press are introduced from the discharge device into an inlet channel of the discharge device.

[0021] 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, which is usually in powder form, is pressed. The receptacles can be formed by holes in the die plate, with which the press punches cooperate directly. However, it is also possible that so-called die sleeves forming the receptacles are arranged in the holes in the die plate. The die plate can be designed in one piece or by die segments. The rotor is driven in rotation, for example, about a vertical axis, by a rotary drive. The pressed products produced by the rotary press can be tablets. The rotary press is equipped with a discharge device according to the invention.

[0022] According to one design, the pressed product can be transported from the receiving portion to the die plate by the lower press punch before reaching the discharge device. The lower press punch is moved axially upward by the lower punch guide and, if necessary, a control element, such as a cam element, before reaching the discharge device, so that the lower press punch pushes the pressed product located in the receiving portion upward onto the upper side of the die plate.

[0023] The discharge device may include a scraping device for scraping the pressed product from the die plate into the input channel of the discharge device. The scraping device may include, for example, a fixed, for example sickle-shaped, scraping element, under which the die plate rotates and passes. The pressed product conveyed onto the die plate is then scraped into the input channel by the scraping element.

[0024] According to another embodiment, the rotary press can include a housing surrounding the rotor and the discharge device. The interior of the housing can be under overpressure or underpressure relative to the surroundings of the housing or the discharge channel. The escape of dust from the interior of the rotary press is minimized by generating a corresponding underpressure. Such underpressure is present in particular in so-called closed presses. However, if an overpressure or underpressure is required, for example to extract excess product, an overpressure or underpressure can also be desired in non-closed presses.

[0025] According to another embodiment, the housing can be sealed with respect to the surroundings. Thus, the rotary press can be a hermetic press. The hermetic sealing of the housing with respect to the surroundings reduces the escape of dust. In this case, the rotary press can be, for example, a hermetic or highly hermetic press according to the SMEPAC standard. The rotary press can, for example, at least meet OEB level 3. However, the rotary press can also, for example, meet OEB level 4 or 5. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Embodiments of the present invention are described in more detail below with the aid of the drawings. In the drawings:

[0027] Figure 1 The rotary press according to the invention is shown in an expanded view of the rotor,

[0028] Figure 2 A detailed view of a discharge device according to the invention is shown for discharging Figure 1 The rotary press shown in FIG. 1 discharges the pressed product, wherein the discharge device is in a first operating position,

[0029] Figure 3 Show Figure 2 The discharge device in the second operating position,

[0030] Figure 4 A discharge device according to another embodiment of the present invention is shown, wherein the discharge device is used to discharge Figure 1 The rotary press shown in FIG. 1 discharges the pressed product, and

[0031] Figure 5 A discharge device according to another embodiment of the present invention is shown, wherein the discharge device is used to discharge Figure 1 The pressed product is discharged from the rotary press shown in FIG. DETAILED DESCRIPTION

[0032] Unless otherwise indicated, the same reference numerals in the various figures denote the same objects.

[0033] exist Figure 1The rotary press shown in the figure, in particular the rotary tablet press, comprises a rotor driven in rotation by a rotary drive, the rotor having a die plate 10, the die plate having a plurality of receptacles 12. The receptacles 12 can be formed, for example, by holes in the die plate 10. In addition, the rotor comprises a plurality of upper punches 14 and lower punches 16, which are synchronously surrounded with the die plate 10. The upper punch 14 is axially guided in the upper punch guide 18, and the lower punch 16 is axially guided in the lower punch guide 20. The axial movement of the upper punch 14 and the lower punch 16 during the rotation of the rotor is controlled by the upper control cam element 22 and the lower control cam element 24. The rotary press also comprises a filling device 26, the filling device having a filling reservoir 28 and a filling chamber 30, the filling reservoir and the filling chamber being connected by a conveying portion 32. In this way, in the present exemplary embodiment, the powdered filling material passes from the filling reservoir 28 via the conveying section 32 under the action of gravity into the filling chamber 30 and from there via the filling opening provided on the underside of the filling chamber 30 under the action of gravity into the receptacle 12 of the mold plate 10 .

[0034] Furthermore, the rotary press comprises a pressure device 34. The pressure device 34 comprises a pre-pressing device with an upper pre-pressing roller 36 and a lower pre-pressing roller 38 and a main pressing device with an upper main pressing roller 40 and a lower main pressing roller 42. Furthermore, the rotary press comprises a discharge device 44 and a scraping device 46 of the discharge device 44 with a scraping element, which conveys a pressed product 48, in particular a tablet, produced in the rotary press 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 pressed product 48 conveyed to the upper side of the die plate 10 by the lower punch 16 from the die plate 10 in the region of the discharge device 44 and conveys it to the discharge device 50.

[0035] The rotary press also 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 during operation. In addition, the control device can be connected to any sensors of the rotary press, in particular to receive any sensor data and use them as a basis for control. For control, the control device 52 can be connected to all components of the rotary press to be controlled via corresponding lines.

[0036] In addition, the rotary press is arranged on Figure 1In the housing 53 shown in dashed lines. In particular, the rotor and the discharge device 50 of the rotary press are arranged in the 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. In addition, the housing 53 can be sealed against the surroundings. The rotary press can be a so-called closed press.

[0037] With the help of Figure 2 and 3 The discharge device 50 of the rotary press should be explained in detail. The discharge device 50 has an input channel 54, to which the pressed product 48 scraped from the mold plate 10 by the scraping device 46 is usually conveyed. The discharge device 50 also has a first discharge channel 56 and a second discharge channel 58. The first discharge channel 56 leads to a first outlet for the pressed product manufactured in the rotary press, and the second discharge channel 58 leads to a second outlet for the pressed product manufactured in the rotary press. The first outlet connected to the first discharge channel 56 can be, for example, an outlet for differential pressure products, which are, for example, identified as defective by the sensor mechanism of the rotary press. The second outlet connected to the second discharge channel 58 can be, for example, an outlet for good pressed products, which meet predetermined technical specifications. The discharge device 50 also has another input channel 60, which is directly connected to the first discharge channel 56 and therefore to the first outlet of the rotary press, for example, for differential pressure products. The scraping device 46 can include a sorting device, for example, including a sorting nozzle, with which the pressed products identified as poor are sorted into the other input channel 60 before they reach the input channel 54, so that the pressed products identified as poor continue to the first outlet of the rotary press, for example for poorly pressed products, through the first discharge channel 56. In principle, the discharge device 50 can have a ramp, so that the pressed products conveyed into one of the input channels 54, 60 are conveyed through the input channel under the effect of gravity.

[0038] There is also a splitter 62 between the input channel 54 and the first and second discharge channels 56, 58, which has a pivot axis 64 that can be pivoted. Figure 2 The first position shown in Figure 3 The deflector element 66 can be adjusted between the second position shown in FIG. The deflector element 66 can be designed, for example, as a so-called deflector blade, for example in the form of a deflector plate. Figure 2 In the first position shown in FIG. 5 , the pressed product delivered into the input channel 54 is delivered to the first discharge channel 56 and thus to the first outlet of the rotary press. Figure 3In the second position shown in FIG. 5 , 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 pivoting the diverter element 66 in a Figure 2 and Figure 3 . Here, the dividing element 66 forms a section of the wall of the input channel 54 and, depending on the position, a section of the wall of the first and / or second outlet channel 56, 58. In addition, in the example shown, a permanently open pressure balancing channel 68 is arranged parallel to the divider 62, via which pressure balancing is performed between the input channel 54 on the one hand and the first and / or second outlet channel 56, 58 on the other hand. Here, pressure balancing is also performed between the further input channel 60 and the first or second outlet channel 56, 58. In particular, the pressure balancing channel 68 is indirectly connected to the input channel 54, 60 via the rotor of the rotary press or the interior space of the press. On the other hand, the pressure balancing channel 68 is directly connected to the second outlet channel 58. In particular, when the dividing element 66 is in Figure 2 and 3 When moving between the positions shown in , air can flow through the pressure compensation channel 68, which reduces the pressure difference on the divider 62 at least to such an extent that the divider element 66 safely and reliably reaches its corresponding end position without the need for a larger drive.

[0039] In the example shown, the discharge device 50 also includes a third discharge channel 70, which leads to a third outlet of the rotary press for pressed products, in particular to an outlet for a sample column, i.e., for pressed products to be fed to a sampling test. In the example shown, there is a further divider 72 between the second discharge channel 58 and the third discharge channel 70, which also has a divider element 76, such as a further divider blade, which can be pivoted about a pivot axis 74. Figure 2 and 3 , the further divider 72 is shown in one of its two positions or end positions. In this position, the pressed product introduced into the second outlet channel 58 remains in the second outlet channel and reaches the second outlet of the rotary press. By switching the second divider 72 into its second position, in which the free end of the second divider rests against the intermediate wall between the first and second outlet channels 56, 58, the pressed product introduced into the second outlet channel 58 can be introduced from the second outlet channel into the third outlet channel 70 and thus into the third outlet of the rotary press.

[0040] exist Figure 4 and 5 A further embodiment of the discharge device according to the invention is shown in FIG. Figure 4 In the embodiment of the invention, the pressure balance channel 68 is directly connected to the inlet channel 54 on the one hand and directly connected to the first outlet channel 56 on the other hand. The pressure balance channel accordingly ensures pressure balance between the inlet channel 54 and the first outlet channel 56. Figure 5 In the embodiment shown in FIG. 1 , the pressure balance channel 68 is directly connected to the input channel 54 on the one hand and directly connected to the second outlet channel 58 on the other hand. The pressure balance channel accordingly ensures pressure balance between the input channel 54 and the second outlet channel 58. In addition, according to Figure 4 and 5 The discharge device can be arranged according to the above Figures 1 to 3 The embodiment of the invention is constructed or integrated into a rotary press. Figures 1 to 3 As stated, according to Figure 4 and Figure 5 The discharge device can also have, for example, a further divider 72 and a third discharge channel 70 .

[0041] Reference numerals list

[0042] 10 Mold plate

[0043] 12 Accommodation

[0044] 14 Upper punch

[0045] 16 Lower punch

[0046] 18 Upper punch guide

[0047] 20 Lower punch guide

[0048] 22 Upper control cam element

[0049] 24 Lower control cam element

[0050] 26 Filling device

[0051] 28 Filling the reservoir

[0052] 30 Filling chamber

[0053] 32 Conveying Department

[0054] 34 Pressure device

[0055] 36 Upper pre-pressing roller

[0056] 38 Lower pre-pressing roller

[0057] 40 Upper main pressure roller

[0058] 42 Lower main pressure roller

[0059] 44 Discharging device

[0060] 46 Scraping device

[0061] 48 Pressed products

[0062] 50 Discharge device

[0063] 52 Control Device

[0064] 53 Shell

[0065] 54 input channels

[0066] 56 First discharge channel

[0067] 58 Second discharge channel

[0068] 60 Additional discharge channels

[0069] 62 Splitter

[0070] 64 Pivot Axle

[0071] 66 Directional element

[0072] 68 Pressure balance channel

[0073] 70 Third discharge channel

[0074] 72 Additional splitters

[0075] 74 Pivot Axle

[0076] 76 Directional Components

Claims

1. A discharge device for discharging a pressed product (48) from a rotary press, the discharge device comprising an input channel (54) and a first discharge channel (56) and a second discharge channel (58), the input channel being connectable to a discharge device (44) of the rotary press for the pressed product (48) produced in the rotary press, the discharge device further comprising a divider (62) arranged between the input channel (54) on the one hand and the first discharge channel (56) and the second discharge channel (58) on the other hand, wherein: The divider (62) can be adjusted between a first position and a second position, in which the pressed product (48) is introduced from the input channel (54) into the first discharge channel (56), and in which the pressed product (48) is introduced from the input channel (54) into the second discharge channel (58), and is characterized in that a permanently open pressure equalization channel (68) is provided in parallel with the divider (62), through which pressure equalization is performed between the input channel (54) on the one hand and the first discharge channel (56) and / or the second discharge channel (58) on the other hand, and the pressure equalization channel enables air flow parallel to the divider and thereby reduces the pressure difference on the divider, and the residual pressure difference is limited by the cross section of the pressure equalization channel and the resulting flow velocity.

2. The discharge device according to claim 1, characterized in that: The flow cross section of the pressure equalization channel (68) is at least 10% of the flow cross section of the supply channel (54).

3. The discharge device according to claim 1, characterized in that: The flow cross section of the pressure equalization channel (68) is at least 25% of the flow cross section of the supply channel (54).

4. The discharge device according to claim 1, characterized in that: The flow cross section of the pressure equalization channel (68) is at least 50% of the flow cross section of the supply channel (54).

5. The discharge device according to claim 1, characterized in that: The flow cross section of the pressure equalization channel (68) is at least 100% of the flow cross section of the supply channel (54).

6. The discharge device according to any one of claims 1 to 5, characterized in that: The diverter (62) has a diverter element (66) which is pivotable between a first position and a second position.

7. The discharge device according to claim 6, characterized in that The deflector element (66) is a deflector blade.

8. The discharge device according to claim 6, characterized in that: The dividing element (66) forms a section of a wall of the inlet channel (54) and / or of the first outlet channel (56) and / or of the second outlet channel (58).

9. The discharge device according to any one of claims 1 to 5, characterized in that: The pressure equalization channel (68) is directly connected to the first outlet channel (56) and / or the second outlet channel (58).

10. The discharge device according to any one of claims 1 to 5, characterized in that The pressure equalization channel (68) is directly connected to the input channel (54).

11. The discharge device according to any one of claims 1 to 5, characterized in that: The pressure equalization channel (68) can be connected to the input channel (54) via the rotor of the rotary press or the interior space of the press.

12. A rotary press having a rotor, wherein: The rotor comprises an upper punch guide (18) for an upper press punch (14) and a lower punch guide (20) for a lower press punch (16), and a die plate (10) between the upper punch guide (18) and the lower punch guide (20), wherein the upper press punch (14) and the lower press punch (16) cooperate with a receptacle (12) of the die plate (10), the rotary press further comprising at least one filling device (26) in which the material to be pressed is filled into the receptacle (12), and the rotary press further comprising at least one pressing device (34) ), the pressure device cooperates with an upper press punch (14) and a lower press punch (16) during operation, so that the upper press punch and the lower press punch press the material located in the receiving portion (12) into a pressed product (48), and the rotary press has a discharge device (44) for the pressed product (48) produced in the rotary press, characterized in that a discharge device (50) according to one of claims 1 to 11 is also provided, and the pressed product (48) produced in the rotary press is introduced from the discharge device (44) into an input channel (54) of the discharge device (50).

13. The rotary press according to claim 12, characterized in that The pressed product (48) is transferred from the receiving portion (12) to the die plate (10) by the lower press punch (16) before reaching the discharge device (44).

14. The rotary press according to claim 12 or 13, characterized in that: The discharge device (44) comprises a scraping device (46) for scraping the pressed product (48) from the mold plate (10) into an input channel (54) of the discharge device (50).

15. The rotary press according to claim 12 or 13, characterized in that: The rotary press comprises a housing (53) surrounding a rotor and a discharge device (50).

16. The rotary press according to claim 15, characterized in that The interior of the housing (53) is under an overpressure or underpressure relative to the first outlet channel (56) and the second outlet channel (58).

17. The rotary press according to claim 15, characterized in that The housing (53) is sealed against the surrounding environment.

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