Squeeze roller table for a rotary tablet press with external bearing support for the squeeze roller unit

Abstract

The present invention preferably relates to a pressing roller table (1) for a rotary press, the pressing roller table having a guide profile (3) which can be fixed to the rotary press and comprises two side surfaces (5), and a pair of upper and lower shaft receiving parts (7) for a pressing roller shaft (13) are arranged on the outside of each of the two side surfaces, so that two pairs of squeeze rollers (11) can be mounted on the same guiding profile (3). In a preferred embodiment, the shaft receiving part (7) has a shape that is laterally open outwards, particularly preferably a U-shape, and is designed to rotatably mount the pressing roller shaft (3). On the other hand, the present invention relates to a rotary press comprising such a preferred pressing roller table (1).

Description

Technical Field

[0001] The invention preferably relates to a squeezing roller table for a rotary tablet press, which has a guide profile that can be locked to the rotary tablet press and comprises two side surfaces, on which a pair of upper and lower shaft seats for the squeezing roller shafts are respectively arranged on the outside, so that two pairs of squeezing rollers can be attached to the same guide profile. In a preferred embodiment, the shaft seat has a shape that is laterally open to the outside, particularly preferably U-shaped, and is arranged to rotatably mount the squeezing roller shaft. On the other hand, the invention relates to a rotary tablet press comprising such a preferred squeezing roller table. Background Art

[0002] The invention relates to the field of rotary tablet presses which are used in the pharmaceutical, technical or chemical industry or in the food industry for the mass production of tablets or pellets from powdered material.

[0003] As is known, a rotary tablet press has a turret carrying a plurality of pairs of punches, each pair consisting of an upper punch and a lower punch adjustable relative to each other. The turret comprises a die table, on whose reference circle die openings are arranged at regular intervals, the upper and lower punches fitting directly in the die openings or the die openings having sleeve-like inserts, which are called dies. The material to be pressed is filled into these dies or die openings by means of a filling device.

[0004] When, due to the rotation of the turntable, a pair of punches enters the area of ​​the die or die opening filled in this way, the two punches are moved towards each other by the cam and enter the area of ​​the squeezing roller table. In the squeezing roller table, for example, the punches press against each other so that the material in the die opening is squeezed into a tablet. After the squeezing process is completed, both punches move upwards and the tablet is ejected from the die opening or die. The squeezing force is transmitted to the pressing tool via the squeezing rollers. The pressing tool is also called the upper punch and the lower punch.

[0005] In the prior art, rotary tablet presses are also known in which the squeezing rollers are mounted separately from each other, for example on the top on the head and on the bottom on a carrier plate in the base of the rotary tablet press. For example, in EP 1 627 727 B1, the upper squeezing roller is attached to the upper crossbeam, while the lower squeezing roller is attached separately to the lower crossbeam of the machine housing.

[0006] The disadvantage of the two squeezing rollers being arranged separately is that the squeezing forces generated during the squeezing process are directly transmitted to the upper and lower machine housings. The machine housing of a rotary tablet press can, for example, consist of a machine base, on which the carrier plate for the lower squeezing roller is located, and a head part, to which the upper squeezing roller is attached. The head part and the machine base must be connected to one another by 2 to 4 angle bars. In order to withstand the squeezing forces, the head part, the angle bars and the machine base must be manufactured very robustly at high material costs.

[0007] Furthermore, it has been shown that when the upper and lower squeezing rollers are mounted separately, the machine housing emits considerable structure-generated sound vibrations in the audible range. Thus, at high rotational speeds of the turret of a rotary tablet press, sound pressure levels of more than 100 dB may occur.

[0008] In order to avoid these disadvantages, prior art squeeze roller tables have been proposed with guide profiles or guide columns which are suitable for holding a squeeze roller pair consisting of an upper squeeze roller and a lower squeeze roller.

[0009] Such squeeze roller tables are known in the prior art, for example from documents EP 0 856 394 B1 or EP 0 856 394 B1.

[0010] EP0856394B1 discloses a squeezing roller table for a rotary tablet press, wherein the squeezing roller table has a frame that can be locked to the rotary tablet press and includes two bearing blocks for squeezing rollers. The frame consists of guide columns, and the bearing blocks are arranged on an upper squeezing roller seat and a lower squeezing roller seat that are guided by the guide columns and can be adjusted relative to each other. Preferably, the guide columns are cylindrical, and the squeezing roller seats are preferably designed as round or conical openings for receiving the bearing blocks or squeezing roller shafts.

[0011] EP0856394B1 also discloses a rotary tablet press with a squeezing roller table, which comprises a solid guide column with a cylindrical cross section. In order to reduce noise, the rotary tablet press according to EP0856394B1 comprises a solid, bending-resistant and torsion-resistant base plate to accommodate the turntable, the drive system and the squeezing roller table. Here, the carrier plate is held by the base frame of the rotary tablet press via an elastic bearing, so that the rotary tablet press can operate with low vibration and low noise even under high squeezing forces.

[0012] A feature of modern rotary tablet presses is that, starting from a basic configuration for producing monolayer tablets, the basic tablet press can be converted by adding additional modules so that also bilayer, trilayer or core-coated tablets can be pressed. These additional modules can be, for example, additional pressing stations. It has also been shown that the quality of monolayer tablets can be improved if, before the actual tablet production, the pressed material is degassed in a so-called pre-pressing station, which also consists of a pair of pressing rollers.

[0013] Therefore, there is a need to provide a rotary tablet press integrating multiple pressing stations (eg, a pre-pressing station and a main pressing station), wherein a flexible design is preferred to allow different operating states depending on the desired application.

[0014] From WO2018 / 109813A1, a rotary tablet press is known, which has a pre-extrusion station and a main extrusion station, each of which includes two pairs of extrusion rollers attached to a vertical bearing profile. In addition, in a rotary tablet press according to JP2006263764A, for example, two pairs of extrusion rollers for the pre-extrusion station and the main extrusion station can be mounted on a vertical bearing profile. The rotary tablet press has an upper carrier and a bearing plate. The upper carrier is supported only at the rear by the bearing profile, so that better access to the turntable is provided at the front.

[0015] The support profile for the squeezing rollers features a V-shaped front surface facing the turntable, on which the two pairs of squeezing rollers can be arranged side by side on the turntable circle. When mounted, the squeezing roller axes are located in the vertical carrier. This makes it more difficult to obtain access for replacing the squeezing rollers. In addition, the support profile for mounting the two pairs of squeezing rollers takes up a relatively large space and thus becomes an obstacle to flexible positioning around the turntable.

[0016] For certain applications, it may be preferred that the various compression stations can be located at different positions within the rotary tablet press to allow for quick and easy changeover.

[0017] In the pressing station with compact cylindrical guide column of EP0856394B1 or EP0856394B1, the carrier plate of the known rotary tablet press has a plurality of recesses. Each of these recesses is equipped with a clamping device, by which the pressing station can be fixed in a desired position.

[0018] In order to use the cost-intensive clamping device particularly effectively, it has been proposed in the prior art to integrate the support or holding device into the individual extrusion tables themselves (WO 2016 / 156306 A1). In this way, particularly low maintenance and simple fastening of the extrusion roller table at a predetermined position on the carrier plate can be achieved, depending on the desired operating mode.

[0019] In addition to conversions for different applications, in the case of conventional rotary tablet presses, it is also necessary to remove the squeezing roller table from the interior of the tablet press for maintenance or cleaning. In particular in the case of squeezing roller tables comprising closed guide columns, it is necessary to move or swivel the table as a whole on a carrier plate for this purpose. Since the total weight of a single squeezing roller table is up to 500 kg, it sometimes has to be supported by lifting equipment.

[0020] In order to ensure improved accessibility to the squeezing roller table parts that need maintenance or replacement, an opening guide profile is proposed in WO 2015 / 169852 A1. Even in such cases, it is usually necessary to move or replace the entire squeezing roller table to change the operation.

[0021] Another disadvantage of the known extrusion stations is the increased space requirement, especially when a plurality of extrusion roller stations are used, for example, for the production of two-layer, three-layer or even core-wrapped tablet presses. When a pre-extrusion station is used in addition to the main extrusion station, it is also necessary to arrange two extrusion roller stations next to each other, which increases the space required.

[0022] When using several individual squeeze rollers, independent oscillations or vibrations can also occur. Although the suspension of the upper and lower squeeze rollers in the squeeze roller table ensures an extremely stable absorption of the squeeze forces, the vibrations are still transmitted to the individual squeeze roller tables, which can increase in opposite directions. This can be counteracted by connecting the individual squeeze roller tables with struts. However, the use of struts is associated with additional design complexity.

[0023] In view of the prior art, there is therefore potential for improvement in providing a rotary tablet press with one or more pressing roller tables of compact design, which preferably can also be converted simply and quickly for different application purposes.

[0024] Purpose of the Invention

[0025] Therefore, it is an object of the present invention to provide a squeezing roller table for a rotary tablet press which eliminates the disadvantages of the prior art. In particular, it is an object of the present invention to develop a squeezing roller table which is characterized by a compact design, versatile application possibilities and a high level of stability as well as low noise generation. Summary of the invention

[0026] According to the invention, the above objects are solved by the independent claims. The dependent claims represent preferred embodiments of the invention.

[0027] In a preferred embodiment, the present invention relates to a squeezing roller table for a rotary tablet press, which has a guide profile that can be locked to the rotary tablet press, wherein the guide profile comprises two side surfaces, on which a pair of upper and lower shaft seats for the squeezing roller shafts are respectively arranged on the outside, so that two pairs of squeezing rollers can be attached to the same guide profile.

[0028] The squeezing roller table is characterized by its extremely compact design for accommodating up to four squeezing rollers. This means, for example, that the main squeezing table and the pre-squeezing table can be arranged in a very limited space. In known squeezing roller tables, this usually requires at least two separate guide profiles or guide columns, which have to be arranged next to each other around the turntable circle.

[0029] By attaching the axle seats to both side surfaces of the guide profile, it is possible to provide in each case two pairs of squeezing rollers, the spatial requirement of which is determined only by the extension of the squeezing rollers themselves.

[0030] However, the design method according to the invention not only reduces the required space, but also significantly improves their stability.

[0031] On the one hand, the arrangement of the pairs of upper and lower bearing seats ensures a high absorption capacity for the squeezing forces generated by the squeezing rollers mounted in the bearing seats. Since these pairs of upper and lower bearing seats are each located on one side surface, this allows particularly effective compensation of opposing squeezing forces. In addition, it has been shown that it is also possible to compensate for transverse forces or vibrations between two pairs of squeezing rollers mounted on the side surfaces of the guide profile.

[0032] While the known use of two or more separate squeezing tables in rotary tablet presses can lead to undesirable vibrations or vibration disturbances, the attachment of the two squeezing roller pairs to the guide profile prevents this by design. On the contrary, the squeezing roller table exhibits excellent overall stability even for independent squeezing processes by means of laterally mounted squeezing roller pairs.

[0033] Thus, with the squeezing roller table, two pairs of squeezing rollers or squeezing units acting independently of each other can be provided in a limited space, which exhibit very little vibration and oscillation and generate only a small amount of noise even under high squeezing forces.

[0034] In a preferred embodiment, the squeezing roller station is characterized in that a first pair of upper and lower squeezing rollers are attached to a first side surface of the guide profile to form a pre-squeezing station, and a second pair of upper and lower squeezing rollers are attached to a second side surface to form a main squeezing station.

[0035] The terms "pre-extrusion station" and "main extrusion station" have the conventional meanings used in the prior art and preferably each comprise a pair of extrusion rollers for transmitting the extrusion force to the pressing tool. Usually, degassing of the extruded material is ensured in a so-called pre-extrusion station before the actual tablet production by extrusion of the material in the main extrusion station. This can improve the quality assurance of the extruded tablets. Therefore, usually the pre-extrusion station is characterized by a smaller insertion depth and / or extrusion force than the main extrusion station.

[0036] With the squeezing roller table according to the present invention, components for the main squeezing station and the pre-pressing station can be more advantageously accommodated in a very small space, and thus a rotary tablet press having extremely small dimensions can be constructed.

[0037] Compared to the known prior art, the possibility of integrating two pairs of squeeze rollers in one compact squeeze station represents a special achievement which distinguishes the squeeze roller station for a wide range of applications.

[0038] In laboratory operation, for example, it is often desirable to be able to run various test series with a small footprint – for feasibility studies or screening purposes, for example. With the squeeze roller table for the flexible integration of up to four squeeze rollers, a rotary tablet press with maximum functionality can be provided on a minimum footprint. This makes it possible to integrate the pre- and main squeeze roller tables and to provide two squeeze rollers for multi-layer operation within one squeeze roller table.

[0039] The attachment of the axle seats of the squeezing rollers on the outer side surfaces also ensures good accessibility. This means that different squeezing rollers can be installed or removed quickly and easily as required. It is not necessary to install or remove the entire squeezing roller table for this purpose. Instead, the squeezing roller axles can be installed and removed in the freely accessible axle seats at the side. It is also possible to arrange a swiveling squeezing roller axle for maintenance or replacement by means of the lateral arrangement of the axle seats. The squeezing roller table thus offers a particularly high degree of flexibility for the needs-based use of modern rotary tablet presses.

[0040] Within the meaning of the present invention, an axle seat preferably means a component which is designed to support a pressing roller axle or a bearing axle in a guide profile for rotating further components of the tablet press.

[0041] For this purpose, the axle seat preferably comprises a mounting portion or mounting surface for locking the squeezing roller or the support shaft and a bearing portion or bearing block for guiding the axle seat in the guide profile. Preferably, the bearing portion is located in the guide profile, for example on a guide rail. On the other hand, the mounting portion or mounting surface faces laterally outward and is therefore easily accessible.

[0042] The axle seat is preferably one-piece in order to bear the highest loads as a solid component, but composite axle seats are also conceivable. Since the axle seat is preferably suitable for mounting the squeeze roller axle, it can also be called a squeeze roller support.

[0043] For mounting and dismounting, it is preferred that the axle seat or its mounting part has a laterally open profile, whereby their cross section can have, for example, a U-shape, an arc, a V-shape, a trapezoid or other open polygonal shape. The receiving surface can preferably be adapted to the shape of the squeeze roller or the support shaft to be mounted. Alternatively, however, the axle seat can also have a laterally closed profile, for example, it is conceivable to provide the mounting part with a socket with, for example, a rectangular or circular cross section for inserting the squeeze roller. It is also conceivable to have a fixing plate with a corresponding locking mechanism for mounting the squeeze roller.

[0044] In a preferred embodiment, the shaft seats have the same design in order to attach a particularly simple bearing shaft of the same design with different squeezing rollers, possibly for different shaft seats. However, it may also be preferred that the shaft seats differ from one another. For example, a pair of shaft seats on one corresponding side surface may be identical in structure but different from the shaft seats on the other side surface. Furthermore, the upper shaft receiving section and the lower shaft receiving section on the corresponding side surface may be identical in structure but different from their counterparts, or three shaft seats may be identical, while the fourth shaft seat has a special function.

[0045] The axle shoe thus regulates the attachment of the squeeze roller to the guide profile, wherein the axle shoe itself is preferably movably mounted in the guide profile.

[0046] The guide profile preferably represents the basic frame or support structure of the squeeze roller table and serves to support or guide the axle seat. Preferably, the guide profile has the form of a column. The terms "guide profile" and "guide column" are preferably used synonymously.

[0047] Thus, generally speaking, the guide profile is a freestanding load-bearing element or a load-bearing column having a vertical height allowing simultaneous attachment of a pair of upper and lower squeezing rollers.

[0048] By mounting the shaft seats of a pair of upper and lower squeezing rollers in guide profiles or guide columns, the squeezing forces occurring during the squeezing process are preferably retained in the guide columns. Preferably, the squeezing forces occurring during the squeezing process can be absorbed by the corresponding adjustment spindles themselves, which continuously adjust the height of the upper and lower squeezing rollers. As a result, the effective squeezing forces remain in the guide columns and do not enter the carrier plate or the machine housing. This prevents the entire frame of the tablet press from being subjected to squeezing forces during the squeezing process. This allows a less solid design of the base and saves material. In addition, frame components such as the head plate, the multifunctional column and the base are not excited to produce vibrations, which would lead to noise pollution if the frequency was in the audible range.

[0049] In order to absorb the extrusion forces, the guide profile is preferably designed as a solid component. For example, it can be made of cast metal.

[0050] The height of the guide profile is determined by the required distance between the upper and lower squeezing rollers, wherein the guide profile preferably has an upper and a lower opening in the side surface for accommodating the axle seats.

[0051] In cross section, the guide profile is preferably characterized by the presence of two side surfaces, which are preferably not parallel or perpendicular to each other. Instead, the side surfaces preferably include a certain angle, which is preferably selected so that the pairs of squeezing rollers that can be attached to the side surfaces act on the turntable reference circle.

[0052] Therefore, the cross section of the guide profile can preferably be partially similar to a ring segment, wherein the two side faces form legs. The front and back sides of the guide profile can be designed as arcs like a ring segment. In this case, the radius of the front side facing the turntable will be smaller than the radius of the back side facing away from the turntable.

[0053] Particularly preferably, the front and back sides are designed as straight lines that fit together in cross section and imitate a circular arc. The front side of the guide profile facing the turntable can, for example, have two surfaces that are angled with respect to one another, while the back side facing away from the turntable consists of three surfaces. It is also conceivable to form the cross section of the front and back sides as a straight connecting line between the side faces, so that the front and back sides each form a planar surface.

[0054] In its inner cross section, the guide profile is preferably not solid, but has cavities for the guide axle seats and possibly other components. The stability of the guide column is therefore largely determined by the side surfaces as well as the front and rear faces and preferably by the spacers. Inner stabilizing walls or struts (spacers) connecting the front, rear and / or side surfaces to one another are preferred and lead to a more uniform distribution of the squeezing and bending forces.

[0055] The guide profile preferably has a front surface facing the turntable, a rear surface facing away from the turntable, and at least two side surfaces on the outer side of which the axle seats are arranged.

[0056] In a preferred embodiment of the invention, the at least two side surfaces form a leg with an angle in the range of from 10° to 120°, preferably from 20° to 80°. Intermediate ranges of the above ranges may also be preferred, such as 10° to 20°, 20° to 30°, 30° to 40°, 40° to 50°, 50° to 60°, 60° to 70°, 70° to 80°, 80° to 90°, 90° to 100° or even 110° to 120°. Those skilled in the art will recognize that the above range limits may also be combined to obtain other preferred ranges, such as 30° to 60°, 20° to 70° or 50° to 80°.

[0057] Preferably, the side faces form angled legs, wherein the side faces do not have a common contact edge. Instead, the side faces may alternatively form legs of an imaginary ring segment, wherein the side faces are connected by a front face and a back face. As described above, the front face and the back face may be angular, multi-surfaced or rounded, arcuate.

[0058] The above angles are preferably determined by the desired turntable reference circle and the dimensions of the squeeze roller shafts and squeeze rollers. If pairs of squeeze rollers are arranged on both sides of the side surface - for example to provide a pre-squeezing station and a main squeezing station - they should preferably be arranged so that both the pre-squeezing roller and the main squeezing roller are centered on the turntable reference circle of the punch or die holder. In the case of very small angles (i.e. acute angles), the squeeze rollers may not fit side by side with each other or may touch each other. For very large angles (i.e. obtuse angles), the squeeze roller tables will cover a large part of the turntable circle.

[0059] Alternatively, the preferred orientation of the side faces of the guide profile can be indicated by a normal vector lying on the side faces.

[0060] In a preferred embodiment of the invention, the guide profile is characterized in that the normals on at least two side surfaces each form a tangent to a circle, the diameter of which can preferably be selected to be greater than the diameter of the turret of the rotary tablet press. The normal to a side surface is generally understood to be a vector perpendicular to the surface, the origin of which is located at the center of the side surface.

[0061] It should be noted that the circle which is preferably perpendicular to the side surface does not correspond to the turntable reference circle on which the attached squeeze roller acts. Instead, the circle defined by the side surface is preferably larger than the turntable reference circle, because the squeeze roller is mounted from the side inward toward the turntable. For example, the diameter of the circle formed by the normal vector can be about half or more larger than the length of the squeeze roller axis (see, for example, Figure 2 ).

[0062] In a preferred embodiment of the invention, the upper and lower axle seats are arranged in the guide profile on corresponding side surfaces so as to be adjustable together with and / or relative to each other. For this purpose, for example, guide rails may be present in the guide profile on which the paired axle seats can be moved together with and / or relative to each other, for example by means of an adjustment spindle and a drive motor.

[0063] It is particularly preferred if the upper and lower axle seats of each pair are individually and independently adjustable vertically (ie along the height of the guide profile).

[0064] For example, it may be preferred to use an adjustment drive to adjust the respective upper bearing support or upper squeeze roller and thus the insertion depth of the upper punch, which is acted upon by the upper squeeze roller.

[0065] It may also be preferred to adjust the lower bearing support or the lower pressing roller relative to the upper bearing support or the upper pressing roller in order to set the height of the tablet to be produced according to a predetermined value.

[0066] Furthermore, the upper and lower pressing roller seats can advantageously be adjusted not only independently of one another, but also together. The parallel adjustment of the two shaft seats at the same distance from one another enables the adjustment of the pressing area. In this way, the area within the die opening in which the pressing of the powdered pressing material takes place can be varied. On the one hand, such an adjustment of the pressing area can be used to pass through different positions inside the die sleeve in order to subject them to equal forces and wear. In addition, the vertical adjustability of the pressing area facilitates the precise pressing of different layers in a multilayer tablet.

[0067] In a further embodiment of the invention, guide rails are present in the guide profile, on which the upper and lower axle seats can be moved vertically together with each other and / or relative to each other. For this purpose, the guide rails and the axle seats (or their bearing parts) preferably match each other exactly. For example, in order to minimize lateral play, a dovetail-shaped guide may be preferred.

[0068] In terms of design, it may be preferred that the upper and lower shaft seats are arranged on a common sliding guide plane defined by the guide rails. The shaft seats slide on the common sliding guide plane, for example as guide carriages. Preferably, the plane guide rails can be used as sliding bearings, which are designed with particularly preferred clearance adjustability. By minimizing the guide clearance, the guiding accuracy of the shaft seats can be increased, thereby increasing the positioning accuracy of the squeezing rollers.

[0069] The axle seat is preferably adjusted in the guide profile by means of an adjusting drive, an adjusting spindle being particularly preferred.

[0070] In a preferred embodiment of the invention, the squeeze roller table comprises an adjustment spindle for moving the axle seat, which adjustment spindle is inside the guide profile. The adjustment spindle can preferably be a threaded spindle, in particular a ball screw spindle, wherein the axle seat is mounted on them as a sliding guide carriage. By means of the rotational movement of the adjustment spindle, the vertical position of the axle seat and thus the vertical position of the squeeze roller can be adjusted particularly precisely.

[0071] For example, a rotary motor can be used together with a transmission to achieve the rotary movement. In conventional squeeze roller tables, the adjustment spindle is located together with the rotary motor in the squeeze roller table itself, so that it is not necessary to release the connection when moving and / or removing the squeeze roller table. This is advantageously not necessary due to the lateral accessibility of the squeeze roller seat or the shaft seat.

[0072] Instead, the squeezing roller table can be permanently mounted on the carrier plate. In addition to the advantages of simplified maintenance and conversion already described, this also allows the motor or its transmission to be mounted outside the squeezing roller table in a practical manner.

[0073] In a preferred embodiment of the invention, there is no motor for adjusting the squeezing roller seat in the guide profile of the squeezing roller table. Instead, the motor for adjusting the axle seat and its transmission, if necessary, can be installed outside the squeezing roller table, for example, under the carrier plate. By removing the motor, the space required for the squeezing roller table itself can be further reduced.

[0074] Mounting the axle seat on the side surface of the guide profile already simplifies access for assembly purposes. In this respect, it has proven to be particularly advantageous to use an axle seat with a shape that opens laterally outwards. Opening laterally outwards preferably refers to the guide profile and means that lateral removal and / or rotation of the mounted squeezing roller is possible.

[0075] For this purpose, it is preferred that the axle seat has an opening laterally outwards (ie in the direction facing away from the side surface) through which the squeezing roller can be laterally inserted or removed.

[0076] In order to be able to absorb the extrusion forces, the mounting surface preferably has upward and downward mating surfaces. It is also preferred that there is a boundary towards the inside (ie in the direction facing the guide profile) to which the extrusion roller can be attached in a press-fit and / or form-fit manner.

[0077] In a particularly preferred embodiment, the shaft seat has a U-shaped mounting surface in the cross section so that the cubic extrusion roller can be locked in the shaft seat in a press fit and / or form fit manner. Within the meaning described above, the U-shape is preferably laterally open outward. This U-shape is particularly suitable for installing and fixing a substantially cubic extrusion roller or a cubic support shaft for other components of a tablet press. In the locked state, the cubic shaft is located on three boundary surfaces: the upper side, the lower side and the inner side (relative to the guide profile). Particularly preferably, the upper side and the lower side are parallel to each other and are at right angles to the inner side, respectively. The transition portion or corner can be beveled or rounded. The U-shape ensures that the extrusion force acting in particular upward and downward is stably absorbed in the shaft seat. In addition, the rotational clearance of the extrusion roller in the shaft seat can be reliably prevented with low wear. The term "U-shape" preferably also includes a substantially straight U-shape with a possibly inclined or rounded corner.

[0078] In addition to the preferred U-shape, other laterally outwardly open contours may also be preferred, such as an arc, a semicircle, a V-shape, a trapezoid or other open polygons.

[0079] In a further preferred embodiment, the axle seat has means for mounting the squeezing roller laterally outwardly. Preferably, the axle seat is designed such that when the squeezing roller is mounted, the center of rotation is located in the rear region of the axle seat and therefore outside the guide profile.

[0080] For example, the shaft seat can have opposite holes in the rear region so that the squeeze roller or the support shaft can be mounted rotatably or pivotably via a pivot pin. Preferably, the squeeze roller or the support shaft has a corresponding socket for the pivot pin. The center of rotation of the squeeze roller is preferably determined by the socket for receiving the pin. Other design variants for the swivel joint are also conceivable, in which their rotation point is also preferably arranged in the rear region of the shaft seat in order to be able to easily pivot the squeeze roller out of the turntable reference circle.

[0081] Preferably, the shaft seat may also include a releasable locking mechanism to prevent play about the axis of rotation during operation of the rotary tablet press.

[0082] For example, it may be preferred to securely lock the squeeze roller in the front region of the axle seat by means of a clamping bolt. An additional play-free attachment can be ensured, for example, by using a wedge which is inserted into the squeeze roller from behind. When swung into the operating position, in particular when using a clamping bolt and a wedge, there is a force-fitting and / or form-fitting connection which provides the necessary stability to absorb the squeeze forces.

[0083] To release the lock and swivel out, the clamping bolt can be loosened so that the squeeze roller is attached to the axle seat only via the swivel joint in the rear region. Particularly preferred is a tool-free fastening mechanism that can be easily and reliably released or closed manually without the use of (special) tools.

[0084] The slewing bearing on the guide profile makes maintenance, replacement or conversion of the squeezing rollers or other components mounted in the axle housing (e.g. turntable removal arms) particularly easy.

[0085] Instead of tediously and laboriously lifting the entire pressing table out of the rotary tablet press, the pressing rollers mounted laterally on guide profiles can be swiveled out individually for assembly or disassembly. Changeover or maintenance of the individual pressing rollers can be carried out quickly and swiftly by one person in the typical force measurement position. Personnel and cost expenditure can be significantly reduced.

[0086] This squeeze roller table is therefore characterized by maximum flexibility in use in accordance with requirements. For example, for applications with different required squeeze forces, the corresponding squeeze roller with optimized sensitivity can be inserted without difficulty.

[0087] The provision of the swivel capability results in a particularly wide range of application potentials for the shaft seat. For example, it is also possible, preferably using a swivel bearing in the shaft seat, to realize a swivel removal of the turntable. For this purpose, it is only necessary that the support arm or lifting arm for the turntable has at least partially the same dimensions as the squeeze roller shaft. This allows the support arm or lifting arm for the turntable to be swivel-locked in the shaft seat in the same way, in a press-fit and / or form-fit manner. No additional swivel or lifting mechanism is required. Instead, the shaft seat of the squeeze roller table can be used multifunctionally not only for mounting various squeeze rollers, but also for mounting other components, such as retention rods or even the entire turntable.

[0088] Thus, having at least two, preferably at least four, axle seats for the rotatably mounted mechanism enables a wide range of design variants and provides a highly flexible rotary tablet press. Thus, the rotary tablet press according to the invention can not only cover the entire range of pressing variants, but also features a user-friendly, compact design.

[0089] This is particularly the case for the described squeezing roller table with at least two side surfaces on which a pair of upper and lower axle seats for the squeezing roller shafts are arranged externally. In addition, the preferred laterally open axle seats have many advantages for providing a guide profile with at least one side surface and a pair of axle seats for mounting the squeezing roller shafts.

[0090] Therefore, in another aspect, the invention also relates to a squeezing roller table for a rotary tablet press, which has a guide profile that can be locked to the rotary tablet press and comprises at least one side surface, on which a pair of upper and lower shaft seats for the squeezing roller shaft are arranged externally, the shaft seats having a laterally open profile and preferably comprising means for rotatably mounting the squeezing roller shaft. Such a squeezing roller table with at least two shaft seats does not necessarily offer the possibility of integrating up to four squeezing rollers. With regard to flexible replacement, maintenance or conversion options, as described above, the provision of an externally laterally open profile of the shaft seat already offers many advantages. This is particularly the case for particularly preferred embodiments of the shaft seat, for example, a U-shaped cross section for accommodating a cubic squeezing roller shaft, or the use of a swivel joint or a pivot pin in the rear region of the shaft seat.

[0091] In a preferred embodiment of the invention, the squeeze roller table can be provided with at least two, preferably at least four, six, eight or more squeeze roller units and / or one or more squeeze guide rail units. In the meaning of the invention, a squeeze roller unit preferably means a unit comprising a squeeze roller and a squeeze roller shaft. In the meaning of the invention, a squeeze guide rail unit preferably means a unit comprising a retention rod and a supporting shaft for the retention rod. The shafts of the squeeze roller units or squeeze guide rail units preferably have at least partially identical dimensions, which are designed to fit precisely in the shaft seats.

[0092] However, the squeeze roller shafts can differ, for example, in their sensitivity or the squeeze rollers mounted on them. Likewise, retention rods with different lengths or shapes can be arranged on support shafts of identical construction. Depending on the application, two, preferably four squeeze roller units and / or squeeze guide rail units are selected and mounted on the guide profile.

[0093] In addition, in a further preferred embodiment of the invention, the squeeze roller table is provided with at least one support shaft for the turntable or the maintenance device, which support shaft is preferably at least partially designed to fit precisely in an axle seat. Preferably, the support shaft can, for example, have a cross-section of the same size as the cross-section of the squeeze roller shaft, which cross-section is designed to fit precisely in the axle seat.

[0094] For example, if the axle seat is U-shaped and the squeeze roller axle is cubic, preferably a likewise cubic support axle of the same dimensions is provided. The support axle may preferably be a support arm or lifting arm, which is also configured at one end for attachment to a turntable or maintenance equipment.

[0095] In a further preferred embodiment of the invention, the squeezing roller table comprises a sensor for measuring the squeezing force. For this purpose, the squeezing roller is preferably equipped with a strain gauge for determining the squeezing force. In the sense of the invention, strain gauges are preferably measuring devices for detecting tensile and / or squeezing deformations. Preferably, they change their electrical resistance even at low deformations, which is why they are particularly suitable as strain sensors. Preferably, they are applied in a suitable manner known to a person skilled in the art to the components that are subjected to the least deformation under load. Advantageously, this deformation or stretching leads to a change in the resistance of the strain gauge bridge. In a particularly preferred embodiment, the lower squeezing roller is provided with such a strain gauge. However, it may also be preferred that the upper squeezing roller or both squeezing rollers are provided with strain gauges. The strain gauges preferably cover the force range of 20 to 200 kN in stages.

[0096] In another preferred embodiment, the present invention relates to a rotary tablet press comprising the squeezing roller table.

[0097] The rotary tablet press according to the invention is of the type of rotary tablet press which is well known in the prior art as described at the outset. The rotary tablet press is therefore characterized by a turntable which comprises an upper punch guide and a lower punch guide for receiving the punches and a die plate with a die opening for receiving the powdered material. After the die opening has been filled by the filling device, the material can be squeezed into pills or tablets by the interaction of the upper punch and the lower punch. The upper and lower squeezing rollers mounted in the squeezing roller table are particularly preferably used to apply squeezing forces to the upper punch and the lower punch, respectively.

[0098] Therefore, the rotary tablet press comprises an extrusion roller table for loading punches according to the present invention or its preferred embodiments. A person skilled in the art will recognize that the preferred embodiments and advantages disclosed in conjunction with the extrusion roller table are also applicable to the claimed rotary tablet press.

[0099] In another preferred embodiment of the invention, the rotary tablet press comprises a pre-extrusion station and a main extrusion station, wherein the upper and lower extrusion rollers of the pre-extrusion station are mounted on a first side surface of the guide profile and the upper and lower extrusion rollers of the main extrusion station are mounted on a second side surface of the guide profile. For this purpose, the upper and lower extrusion rollers are preferably mounted on extrusion roller shafts, which can be inserted into the shaft seats. Particularly preferably, the extrusion roller shafts are rotatably mounted so that the extrusion roller unit can be swung out laterally from the inner extrusion area for maintenance or conversion purposes or for rotary table replacement.

[0100] In a further preferred embodiment of the invention, the rotary tablet press is characterized by a turntable which comprises a seat for a support arm which can be inserted into an axle seat so that the turntable can be rotatably attached to the guide profile via the support arm. As mentioned above, the axle seat of the squeezing roller table can also advantageously be used for the rotatable locking of other components of the rotary tablet press. The multifunctional use for removing, repairing, cleaning and / or maintaining the turntable is particularly preferred.

[0101] For example, it is known from EP2110231A2 that the turntable can be swiveled out of the extrusion chamber by means of a separate support arm. In its operating position, the turntable is connected to a drive system or a counter bearing at the end face in a press fit. For disassembly, the turntable is connected to the support arm and swiveled outwards around a column mounted on the frame of the tablet press provided for this purpose. In order to raise or lower the turntable, preferably a lifting device is provided, which can be integrated in the support arm or the column.

[0102] By providing the described multifunctional squeeze roller table, a column fixed to the frame and a lifting device for changing the turntable can be omitted. Instead, a simple bearing shaft or a support arm can be connected to the turntable on one side, preferably on the end face, and can be swivelled in the axle seat on the other side. As a swivel joint, for example, a pivot pin is suitable, which is guided as described above, preferably through a socket in the rear region of the axle seat. The adjustment drive of the axle seat can be used to raise or lower the turntable.

[0103] The multifunctional application capabilities of the squeeze roller table therefore allow for a particularly slim design without sacrificing the desired features. This not only reduces the weight and manufacturing costs of rotary tablet presses, but also reduces their maintenance and repair requirements.

[0104] The multifunctional application capability of the shaft seat means that a large number of design variations can be envisaged. For example, it may be preferred to replace the squeeze roller unit with a combined squeeze and retention bar in the pre-squeezing area.

[0105] Therefore, in a further preferred embodiment, the rotary tablet press comprises a main extrusion station, wherein the upper and lower extrusion rollers of the main extrusion station are attached to the second side surface, and wherein the retention bar is attached to an axle seat of the first side surface of the guide profile. The first side surface preferably means the side surface that is passed first in the direction of rotation of the rotary table (pre-extrusion area), while the second side surface receives the downstream components in the direction of rotation (area of ​​the main extrusion station).

[0106] In a further preferred embodiment of the invention, the squeezing roller table is mounted on a carrier plate. Within the meaning of the invention, a carrier plate preferably denotes a solid plate having bending and torsion rigidity, on which the components of the rotary tablet press are mounted. In particular, the carrier plate can represent the upper end of the drive base of the rotary tablet press, while the lower end of the drive base facing the floor is referred to as the base plate.

[0107] Particularly preferably, the squeezing roller table is connected to the central clamping unit via a mounting flange and / or along the circumference of the guide profile of the carrier plate by means of connecting means, preferably screws.

[0108] In the case of known squeezing roller tables, the squeezing roller table on the carrier plate must be moved during maintenance in order to convert it to another application. For this reason, it may be preferred to mount the squeezing roller table so that it can be moved or swiveled around a pivot point. It is also known from the prior art of WO 2016 / 156306 A1 and the like to provide an air cushion to reduce the friction between the guide column and the carrier plate to support the movement or swiveling. For the squeezing roller table according to the invention, such a swiveling or movable bearing may also be preferred.

[0109] Advantageously, it also can be omitted, because the squeeze roller table need not be removed from the turntable chamber as a whole for maintenance, repair or conversion.On the contrary, the squeeze rollers mounted laterally are easy to approach from the side surfaces, and in a preferred embodiment, can also be easily turned around separately.

[0110] Therefore, in a further preferred embodiment of the invention, the squeezing roller table is permanently mounted on the support plate, wherein permanently mounted means in particular that a movement or a pivoting is not possible without the use of tools.

[0111] In another preferred embodiment of the invention, the rotary tablet press comprises a motor and / or a transmission for axially adjusting the axle seat in the guide profile, wherein the motor is not accommodated in the squeezing roller table but is preferably located below the support plate on which the squeezing roller table is mounted.

[0112] The relocation of the motor for the adjustment drive of the axle seat results in a particularly compact squeeze roller table in which, for example, only an adjustment spindle is present, which is connected to the motor via a corresponding connection. The motor itself can preferably be located in a drive base below the carrier plate. In the prior art, squeeze roller tables are usually designed as self-sufficient elements, whose connection to the carrier plate for removal, rotation or movement can be quickly released. This is not necessary for the squeeze roller table according to the invention, so that a connection between the adjustment spindle and the motor or the transmission, which can be difficult to disconnect, can also be omitted. This results in greater design flexibility, so that space-consuming components can be relocated from the squeeze roller table to the drive base. BRIEF DESCRIPTION OF THE DRAWINGS

[0113] Hereinafter, the present invention will be explained in more detail by way of examples, but is not limited to these examples.

[0114] Figure 1 : Schematic diagram of a preferred squeezing roller table. Left: without squeezing roller unit. Right: with squeezing roller unit

[0115] Figure 2 : Schematic cross section of a preferred squeeze roller table with squeeze roller units on the outside on both sides

[0116] Figure 3 : Schematic diagram of a cross section through a preferred guide profile

[0117] Figure 4 : Schematic representation of a detailed view of a preferred axle seat. A: perspective view, B: longitudinal section.

[0118] Figure 5 : Schematic diagram for explaining the rotation of the squeeze roller unit from the shaft seat. A: top view, B: three-dimensional view.

[0119] Figure 6 : Schematic diagram illustrating the removal of the squeeze roller unit from the shaft seat.

[0120] Figure 7 : Schematic diagram of an extrusion roller table with combined extrusion guides and retention bars in the pre-extrusion area

[0121] Figure 8 : Schematic diagram illustrating the use of the upper shaft seat of the squeeze roller table to rotate the turntable out. DETAILED DESCRIPTION

[0122] Figure 1A schematic diagram of a preferred embodiment of a squeezing roller station 1 is shown. The squeezing roller station 1 features a guide profile 3, which comprises two side surfaces 5, on each of which a pair of upper and lower shaft seats 7 for the shafts 13 of the squeezing rollers are arranged externally, so that two pairs of squeezing rollers 11 or squeezing roller units 14 can be attached to the same guide profile 3. The guide profile 3 is designed as a free-standing support element or column and serves to support or guide the shaft seats 7. As a result, the squeezing forces occurring during the squeezing process are absorbed by the guide profile 3 and the adjusting spindle itself. On the left, the squeezing roller station 1 is shown without the squeezing roller unit 14; on the right, with the squeezing roller unit 14 mounted in the shaft seats 7.

[0123] By attaching the axle seats 7 to the two side surfaces 5 of the guide profile 3, two pairs of squeezing rollers 11 can be provided in each case, wherein their space requirement on the turret circle is essentially determined by the extension of the squeezing rollers 11 themselves. The squeezing roller table 1 is therefore characterized by an extremely compact design, wherein, for example, a main squeezing table and a pre-squeezing table can be arranged in a very limited space.

[0124] Figure 2 A schematic diagram of a cross section of a preferred squeeze roller station 1 is shown, wherein squeeze roller units 14 are located externally on both sides, which is desirable in particular for providing a pre-pressing station and a main press station.

[0125] The axle seats 7 are designed to support or guide the squeezing rollers 13 or bearing shafts for other components in the guide profile 3. For this purpose, the axle seats 7 include a mounting section 9 for locking the squeezing rollers or bearing shafts 11, and a bearing section 8 for guiding the axle seats 7 in the guide profile 3. As in the example shown, the bearing section 8 is preferably located on a guide rail 21 inside the guide profile 3, while the mounting section 9 faces laterally outward and is therefore easily accessible. By designing the axle seats 7 as solid, preferably one-piece components, they are mounted to absorb high squeezing forces. The vertical adjustment of the axle seats 7 is preferably achieved in the guide profile 3 by means of adjustment drives or preferably shown adjustment spindles 23. In the embodiment shown, there are four adjustment spindles 23, by means of which the upper and lower axle seats 7 of each pair can be moved vertically (i.e. along the height of the guide profile 3) individually and independently of each other.

[0126] For example, it may be preferred to use an adjustment drive to adjust the respective upper bearing seat or upper pressing roller and thus the insertion depth of the upper punch acted upon by the upper pressing roller. Likewise, it may be preferred to adjust the lower bearing seat or lower pressure roller relative to the upper bearing seat or upper pressing roller by means of a further adjustment spindle in order to define the height of the tablet to be produced. Furthermore, the upper pressing roller seat and the lower pressing roller seat may also be adjusted relative to each other, for example to achieve an adjustment of the pressing area.

[0127] Figure 3A schematic diagram of a cross section through a preferred guide profile 3 is shown. In the cross section, the guide profile 3 is preferably characterized by the presence of two side surfaces 5 which are preferably not parallel or perpendicular to each other. Instead, the side surfaces 5 preferably comprise an angle 27 which is preferably selected such that a pair of squeezing rollers which can be attached to the side surfaces act on a turntable reference circle.

[0128] For this purpose, the cross section of the preferred guide profile 3 partially resembles a circular ring segment, with two side surfaces forming the legs 5. As shown in the embodiment shown, the front side 19 and the back side 17 can be partially straight in cross section and follow the arc of a circle. The radius of the front side 19 facing the turntable is smaller than the radius of the back side 17 facing away from the turntable. Therefore, the front side 19 of the guide profile 3 shown has two surfaces, while the back side 17 has three surfaces. Inside, the guide profile 3 is not solid, but has a plurality of surfaces for guiding the shaft seat 7 and integrating, for example, an adjustment drive (see Figure 2 ) of other parts.

[0129] Figure 4 is a schematic diagram of a detailed view of a preferred axle seat 7. Obviously, the axle seat 7 is characterized by a laterally open profile with a U-shaped cross section, so that the cuboidal squeeze roller 13 can be mounted in a press-fit and / or form-fit manner. In addition, the axle seat 7 has means for laterally outwardly pivotable mounting of the squeeze roller 11, the pivot point being located in the rear region of the axle seat 7 and therefore outside the guide profile 3. For this purpose, opposite sockets are provided in the rear region of the axle seat 7, through which a pivot pin 29 for pivotably mounting the squeeze roller 13 can be guided.

[0130] In the front area of ​​the axle seat 7, the squeeze roller is securely locked in the swiveled-in state by means of a clamping screw 33. The use of a wedge 31 inserted from behind into the squeeze roller 11 can additionally ensure a play-free fixation. Thus, in the swiveled-in operating state, there is a press-fit and / or form-fit connection which has the stability required to absorb the squeeze forces. To release the lock and to swivel out, the wedge 31 and the clamping screw 33 can be loosened, so that the squeeze roller 11 is fastened to the axle seat 7 only by means of the swivel joint or pivot pin 29 in the rear area.

[0131] Figure 5 A schematic diagram is shown illustrating the squeezing roller unit 14 being swung out of the shaft seat 7. While the upper squeezing roller unit 14 is firmly mounted in the upper shaft seat 7 by means of the wedge 31 and the clamping bolt 33, the lower squeezing roller unit 14 has been swung out of the laterally open contour of the shaft seat 7. Figure 5 A shows a top view, and Figure 5 B shows a stereogram.

[0132] In order to remove and, if necessary, replace the squeeze roller unit 14, the pivot pin 29 can also be removed, such as Figure 6 shown.

[0133] The laterally swivellable attachment thus allows the squeeze roller unit to be mounted or removed quickly and easily as required. It is not necessary to mount or remove the entire squeeze roller table 1 for this purpose.

[0134] Advantageously, the shaft support 7 of the pressing roller table 1 can also be used for pivotably locking other components of the rotary tablet press.

[0135] For example, it is preferred to replace the extrusion roller unit with a combined extrusion guide and retention rod in the pre-extrusion area. Thus, the extrusion roller table 1 shown in the figure comprises an extrusion guide unit 39 in the lower shaft seat 7 of the first side surface of the guide profile 3, which extrusion guide unit 39 comprises a retention rod 37 and a support shaft or extrusion roller shaft 11.

[0136] The multifunctional use of the squeeze roller table 1 for removing, repairing, cleaning and / or maintaining the turntable 25 is particularly preferred.

[0137] Figure 8 It is a schematic diagram for explaining how the turntable 25 is rotated out using the upper shaft seat 7 of the squeeze roller table 1.

[0138] For this purpose, the turntable 25 comprises a seat 47 or a fastening means for a support arm 45, which can be inserted into one of the axle seats 7, so that the turntable can be attached to the guide profile 3 in a swivel manner via the support arm 45. Similar to the swivel bearing of the squeeze roller, a pivot pin serves as a swivel joint, which is guided in the rear region through a socket in the support arm 45 of the axle seat 7.

[0139] Figure 8 A shows the transfer state, and Figure 8 B shows the turned-out state, for example for cleaning or maintenance purposes. Advantageously, the adjustment drive of the axle seat 7 can be used to raise or lower the turntable 25. A separate column or a separate lifting device fixed to the frame is no longer required.

[0140] It should be noted that various alternatives to the described embodiments of the present invention may be used to implement the present invention and obtain the solutions according to the present invention. Therefore, the embodiments of the squeezing roller table and the rotary tablet press according to the present invention are not limited to the aforementioned preferred embodiments. On the contrary, a large number of design variations are conceivable, which may deviate from the proposed solutions. The purpose of the claims is to define the scope of protection of the present invention. The scope of protection of the claims is intended to cover the squeezing roller table and the rotary tablet press according to the present invention and their equivalent embodiments.

[0141] Reference numerals list

[0142] 1 Squeeze roller table

[0143] 3 Guide profiles

[0144] 5 Side surface of guide profile

[0145] 7-axis seat

[0146] 8 Supporting part for guiding the shaft seat in the guide profile

[0147] 9 Positioning section for locking the squeeze roller

[0148] 11 Squeeze roller

[0149] 13 Squeeze roller

[0150] 14 Squeeze roller unit

[0151] 15 Loading plate

[0152] 17 Back side of guide profile

[0153] 19 Front side of guide profile

[0154] 21 Guide Rail

[0155] 23 Adjust the drive, especially the spindle

[0156] 25 Turntable

[0157] 27 Angle of side surface

[0158] 29 Swivel joints, especially pivot pins

[0159] 31 Wedge

[0160] 33 Clamping bolt

[0161] 35 Strain gauge sensor

[0162] 37 Parking rod

[0163] 39 Extruded guide units

[0164] 41 Templates

[0165] 43 Lower punch guide

[0166] 44 Upper punch guide

[0167] 45 Support arm

[0168] 47 Seat for supporting arm, especially on the end face of a turntable

Claims

1. A squeezing roller table (1) for a rotary tablet press, the squeezing roller table (1) having a guide profile (3) which can be locked to the rotary tablet press, the guide profile (3) having a front side (19) facing the turntable (25) of the rotary tablet press, It is characterized in that The guide profile (3) is in the form of an independent support column and, in addition to a front side (19) facing the turntable (25), also includes a back side (17) facing away from the turntable (25) and two side surfaces (5), wherein a pair of upper and lower shaft seats (7) for the squeezing roller shaft (13) facing outward are arranged on each of the two side surfaces (5), so that two pairs of squeezing rollers (11) can be attached to the same guide profile (3). The upper shaft seat and the lower shaft seat (7) have a shape that is laterally open outward and a mechanism for rotatably mounting the squeezing roller shaft (13).

2. The squeezing roller table (1) according to claim 1, It is characterized in that On the first side surface (5), there is a first pair of upper and lower squeezing rollers (11) forming a pre-squeezing station, and on the second side surface (5), there is a second pair of upper and lower squeezing rollers (11) forming a main squeezing station.

3. The squeezing roller table (1) according to claim 1 or 2, It is characterized in that At least the two side surfaces (5) are connected to each other via a front side (19) and a rear side (17) and form legs with an angle (27) in the range from 10° to 120°.

4. The squeezing roller table (1) according to claim 3, It is characterized in that The two side surfaces (5) are connected to each other via a front side (19) and a rear side (17) and form a leg having an angle (27) in the range from 20° to 80°.

5. The squeezing roller table (1) according to claim 1 or 2, It is characterized in that The upper and lower axle seats (7) of the side surface (5) are mounted in the guide profile (3) so as to be vertically adjustable together and / or relative to each other.

6. The squeezing roller table (1) according to claim 1 or 2, It is characterized in that The squeezing roller table (1) comprises a guide rail (21) located in the guide profile (3), and the upper shaft seat and the lower shaft seat (7) can be moved together and / or relative to each other on the guide rail (21).

7. The squeezing roller table (1) according to claim 1 or 2, It is characterized in that The squeezing roller table (1) has an adjustment drive (23) for moving the axle seat (7) in the guide profile (3).

8. The squeezing roller table (1) according to claim 7, wherein the adjustment drive (23) is an adjustment spindle.

9. The squeezing roller table (1) according to claim 1 or 2, It is characterized in that The squeezing roller table (1) comprises a motor for adjusting the axle seat (7), the motor being not inside the guide profile (3).

10. The squeezing roller table (1) according to claim 1 or 2, It is characterized in that The shaft seat (7) has a U-shaped mounting surface in cross section, so that a cubic squeezing roller shaft (13) can be locked in one of the shaft seats (7) in a press-fit and / or form-fit manner.

11. A rotary tablet press having a turntable (25) and comprising a pressing roller table (1) according to any one of claims 1 to 10.

12. The rotary tablet press according to claim 11, It is characterized in that The rotary tablet press comprises a pre-extrusion station and a main extrusion station, wherein the upper extrusion roller and the lower extrusion roller (11) of the pre-extrusion station are attached to the first side surface (5) of the guide profile (3), and the upper extrusion roller and the lower extrusion roller (11) of the main extrusion station are attached to the second side surface (5) of the guide profile (3).

13. The rotary tablet press according to claim 11 or 12, It is characterized in that The turntable (25) comprises a seat for a support arm (45), which can be inserted into one of the axle seats (7), so that the turntable (25) can be rotatably attached to the guide profile (3) via the support arm (45).

14. The rotary tablet press according to claim 11 or 12, It is characterized in that The rotary tablet press comprises a main extrusion station, wherein the upper extrusion roller and the lower extrusion roller (11) of the main extrusion station are arranged on the second side surface (5), and wherein the retention rod (37) is arranged on one of the shaft seats (7) on the first side surface of the guide profile (3).

15. The rotary tablet press according to claim 11 or 12, It is characterized in that The squeezing roller table (1) is mounted on a bearing plate (15).

16. The rotary tablet press according to claim 11 or 12, It is characterized in that The rotary tablet press comprises a motor for adjusting the shaft seat (7) in the guide profile (3), wherein the motor is not mounted in the squeezing roller table (1).

17. The rotary tablet press according to claim 16, wherein the motor is mounted below the carrier plate (15).

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