EP3274162A1

EP3274162A1 - Rotary press comprising at least one compression roll station mountable on a support plate, and method for attaching and detaching the compression roll station

Info

Publication number: EP3274162A1
Application number: EP16713842.9A
Authority: EP
Inventors: Michael Matthes
Original assignee: Korsch AG
Current assignee: Korsch AG
Priority date: 2015-03-27
Filing date: 2016-03-29
Publication date: 2018-01-31
Also published as: WO2016156306A1; US20180086017A1; KR20170131560A; JP6730306B2; EP3072675A1; CN107438516A; US10850467B2; JP2018512282A; CN107438516B

Abstract

The invention relates to a rotary press comprising at least one compression roll station (1) that can be mounted on a support plate (2) as well as to methods for attaching and detaching the compression roll station. According to the invention, the at least one compression roll station comprises a retaining device (21), and the rotary press comprises a support plate (2) with at least one cavity (22) for accommodating the retaining device (21) of the compression roll station (1).

Description

Rotary press with at least one attachable to a support plate pressure roller station and method for attaching and detaching the

Pressure roller station

description

The invention relates to a rotary press with at least one on one

Carrier plate attachable pressure roller station, as well as methods for attaching and detaching the pressure roller station. It is known that concentric presses have a rotary driven rotor which carries a plurality of pairs of stamps, each pair of stamps being formed by an upper punch and a lower punch, which are adjustable relative to each other. The rotor comprises a die plate in which on a circular ring at regular intervals die openings are provided, in which the upper and lower punches either interact directly, or have the sleeve-shaped configured inserts, which are referred to as dies. In these dies or die openings to be processed, or, for example, to a tablet to be pressed material is filled by means of a filling device. When a pair of stamps passes through the rotation of the rotor in the region of the thus filled die or die opening, the two punches are moved towards each other by cams and reach the area of a Druckrollenstation in which they are under pressure

be pressed against each other. As a result, the material in the die or the die opening is compressed to, for example, a tablet. Upon completion of the pressing operation, both punches are moved upwards and the tablet is ejected from the die or die.

The pressing force is in accordance with the illustrated procedure, which

is used in particular for producing a so-called single-layer tablet, transferred by means of the pressure rollers on the pressing tools, wherein

Pressing tools in particular the upper and lower punches are called. In the prior art, for example, rotary presses are known in which these pressure rollers are present separately from one another, for example at the top on a head piece and at the bottom on a carrier plate in the base of the rotary press. A disadvantage of this separate arrangement of the two pressure rollers is that the pressing forces arising during the pressing process are transmitted directly into both the upper and the lower machine housing. The machine housing of the rotary press, for example, consists of a machine base, on which the support plate for the lower pressure roller is located, as well as a head piece, on which the upper pressure roller is attached. The head piece and the

Machine base are connected to each other, for example, by 2 to 4 Eckholme, the head piece, corner posts and the support plate in the base of the rotary press in the separate arrangement of the pressure rollers must be made very solid and high cost of materials to withstand the pressure forces. This leads to a high weight of the rotary press and high acquisition costs for a potential customer.

It has also been shown that the machine housing of the rotary presses with a separate attachment of upper and lower pressure roller considerable

Emit structure-borne vibrations of the air in the audible range. At higher speeds of the rotor of the rotary press, sound pressure levels of more than 100 dBA may arise. These disadvantages are with the provision of

Overcome pressure roller stations, which are particularly suitable for receiving a pair of pressure rollers consisting of an upper and a lower pressure roller. Pressure roller stations are known in the art, for example from the documents DE 197 05 092 C1, DE 197 05 094 C1 and DE 10 2009 020 196 A1. In DE 197 05 092 C1 discloses a pressure roller unit for a rotary press, wherein the pressure roller unit has a lockable on the rotary press frame, which can accommodate two bearing blocks, which in turn receive the pressure rollers. The frame is formed from a guide column and the bearing blocks are arranged on guided by the guide column, mutually adjustable upper and lower pressure roller receptacles.

DE 197 05 094 C1 discloses a rotary press, the one

Compression roller unit which consists of a cylindrical cross-section, solid trained guide column. The rotary press according to DE 197 05 In particular, 094 C1 comprises a solid, bending and torsion-resistant

Base plate for receiving the rotor, the drive and the pressure roller unit, wherein the base plate means elastic bearing of a base frame of

Rotary press is added.

In the rotary presses according to DE 197 05 092 C1 and DE 197 05 094 C1 a frusto-conical mounting flange is defined within the lower end of the guide column, wherein in the mounting flange, a tie rod is penetrated, which penetrates a neck extension at the lower end of the frustoconical mounting flange, which is movable within a slot which is introduced into the massive base plate of the rotary tablet press, wherein said fastening means are part of the base plate. The tie rod is penetrated below the base plate of a wedge, which is releasable by means of a spindle, wherein these components are components of the base plate.

In DE 10 2009 020 196 A1 discloses a rotary press disclosed with a pressure roller unit, which is fastened to a bearing device, in particular at least one bearing plate by means of a holding device in a detachable manner, wherein the bearing device comprises a plurality of identical holding devices. In particular, DE 10 2009 020 196 A1 discloses that the holding devices in the

Bearing plate are formed.

In EP 2 065 176 A2, a frame is disclosed which includes a plurality of platforms for receiving and supporting different stations of a rotary press and a plurality of supports. The supports are mounted in pairs on the frame on two sides, the frame being mounted on a base platform. The supports are not columnar constructed and do not directly contain the pressure roller shots, but surround as a frame the entire internal structure of the rotary press. The basic platform is less solid than the solid base plates DE 197 05 092 C1, DE 197 05 094 C1 and DE 10 2009 020 196 A1. The supports are mounted with lower supports as holding devices on the base platform, wherein the lower supports are provided with damping elements. These lie between the ground platform and the props and arranged in front of. In particular, EP 2 065 176 A2 discloses no recesses in the thin base platform with which the lower supports interact. EP 2 1 10 231 discloses a modular rotary tablet press, wherein individual modules within the rotary tablet press can be implemented and / or removed. The rotary tablet press, for example, has two filling stations, two dosing stations and two printing stations, wherein a

Filling shoe of the filling stations an agitating blade for mixing the

Compressive material comprises and finished tablets are removed by means of an ejector from the pressing area of the die.

The known from the prior art pressure roller stations include, for example, support columns, which are arranged outside the pitch circle of the rotatable rotor of the rotary press. The support columns contain inside guide and adjustment means for the upper and lower pressure roller, as well as position measuring and pressure measuring systems. The pressure rollers are in one

Working position of the pressure roller station exactly on a rotor pitch circle, so that the upper pressure roller on the Oberstempel- and the lower pressure roller on the

Unterstempelköpfe acts. If the rotor rotates with the pressing tools, they are pulled by the torque applied by the rotor drive through the upper and lower pressure rollers of the stationary pressure roller station, whereby the pressing force is transmitted from the pressure rollers via the punch heads to the die located in the die material and thus out of the to solve

Pressing preferably a solid tablet is formed.

Modern rotary presses are characterized by the fact that starting from a basic equipment for the production of single-layer tablets by adding appropriate additional modules conversion of the base press can be done to the effect that two-layer, three-layer, or Mantelkern- tablets can be pressed. These additional modules may be, for example, printing stations or pre-press stations. In addition, it has been shown that the quality of single-layer tablets can be improved if, before the actual tablet production by pressing the material located in the die or die opening, a venting of the pressing material takes place in a so-called prepress station. It turns out that it is desirable for the user of a rotary press that the individual printing stations can be arranged at different positions within the rotary press and that a quick and easy conversion and change of position of the individual printing stations should be possible to a flexible use of the rotary press to ensure different operating states.

It is common in conventional rotary presses known in the prior art that the carrier plate of the rotary press has a plurality of recesses, each of these recesses being equipped with a clamping device with which a printing station can be attached to the position predetermined by the recess (cf. for example DE 197 05 092 C1, DE 197 05 094 C1 or DE 10 2009 020 196 A1). It is also known that such clamping devices present in recesses of a carrier plate represent expensive components within a rotary press. Unsatisfactory to the previously known in the art fastening systems is that regularly more

Clamping devices are present in the carrier plate, as positions of

Printing stations are actually occupied. It follows that disadvantageously tensioners are held, which are not used all at the same time in the rule. This leads to an unnecessary increase in the cost of so-called multifunctional rotary presses due to the larger number of

Clamping devices compared to frequented clamping positions.

Based on this prior art, the object of the present invention is to provide a rotary press and method for fastening and releasing a pressure roller station of a rotary press, which do not have the shortcomings and disadvantages of the prior art and in particular a cost, low maintenance and easy-to-use attachment from

Allow pressure roller stations at predetermined positions on the support plate of a rotary press. According to the invention the object is achieved by a rotary press, in particular for the production of tablets, with at least one pressure roller station, wherein the at least one Druckrollenstation comprises a holding device and a

Support plate of the rotary press has at least one recess for receiving the holding device of the pressure roller station. It was quite surprising that a pressure roller station can be provided which comprises a holding device, so that in particular only as many holding devices for the operation of a rotary press have to be provided as printing stations are used. This is advantageously achieved in that the holding device is part of the pressure roller station and is integrated in it.

For the purposes of the present invention, the term "pressure roller column" or "pressure roller station" refers to one of various station types in the field of

Concentric tablet presses, in particular those in whose effective range the pressing of the mostly pulverulent material into solid compacts, for example tablets, takes place. Pressure roller stations are preferably of columnar design or have guide profiles, wherein the columns or profiles used can preferably accommodate two pressure rollers. It is preferred that by means of the pressure rollers, the pressing force for the production of the pellets on the

Crimping tools and thus is transferred to the material to be pressed, in particular, the upper and lower punches are referred to as pressing tools. It is preferred that Druckrollenstationen on a support plate of

Circular press arranged, wherein in the prior art

Pressure roller stations are known, which are fastened with holding devices, which are components of the carrier plates to the support plate. It was completely surprising that with the present invention, a pressure roller column can be provided, which ensures a high stability and a particularly safe operation of the pressure roller station, wherein in

Pressure roller station according to the invention, the holding device for attachment to the support plate is part of the Druckrollenstation and not present within the carrier plate. It is preferred that the holding device according to the invention is a clamping device for fixing the pressure roller station in recesses in the carrier plate of the rotary press. Preferably, at least individual components of the holding device or the entire holding device can be moved in the vertical direction along an imaginary central axis within the pressure roller station. For the purposes of the invention, an up and down movement or an up and down movement of the holding device or its components is thereby preferably carried out. It is thereby advantageously made possible that the holding device, for example, completely or partially inside the

Pressure roller station may be present. When the holding device is completely inside the pressure roller station, the pressure roller column preferably ends flush down so that no components protrude outward. This advantageously allows a displacement or movement of the pressure roller station on the carrier plate of the rotary press.

It is further preferred that the holding device is present in a production position at least partially disposed in the recesses of the carrier plate. For the purposes of this invention, the production position is preferably the position occupied by the pressure roller station when the rotary press is operated, for example to produce tablets. Preferably, the holding device is in a rotor change position completely within the

Pressure roller station, wherein as a rotor change position preferably such a position of the pressure roller station is called, which occupies the Druckrollenstation when a rotor change of the rotary press takes place. For this it is necessary that pressure roller stations can be moved and / or moved on the carrier plate. This is advantageously made possible by the fact that the

Holding device according to the invention is completely present in the interior of the pressure roller station, so that advantageously no components of the holding device protrude from the pressure roller station.

By providing a rotary press, in which the holding device for securing the pressure roller station on a support plate of the rotary press is part of the Druckrollenstation, the invention represents a departure from the hitherto technically usual, because the experts had previously assumed that Holding devices must be part of the carrier plate. It was completely surprising that a pressure roller station can be provided which has so much free volume in the lower area facing the carrier plate that a holding device can preferably be received completely inside the lower area of the pressure roller station.

It is further preferred that the recesses of the carrier plate are formed by openings and / or bores whose diameters correspond to the diameter of the holding device of the pressure roller stations. In particular, the recesses are suitable for receiving the holding device of the pressure roller station. In the known in the art fastening mechanisms for pressure roller stations are the fasteners, for example

Clamping devices, regularly inside the recesses within the carrier plate of the rotary press. This is a disadvantage mainly because these provided in the support plate of the rotary press fixtures are complex in construction and / or own media need supply feeders.

It has been found that the media supply the tensioning devices, if they are provided within a pressure roller station, surprisingly can be done via the already existing connections of the pressure roller station.

In a further preferred embodiment of the invention, the

Holding device on locking elements, which form in their entirety an annular locking unit with a variable diameter.

It is preferable that the locking unit is preferably 2 to 20

Locking units comprises. In this case, the selection of this number is not an arbitrary choice, but corresponds to the result of previous experiments, which have shown that a locking unit with preferably 2 to 20 locking elements is surprisingly easy to manufacture and to an unexpected stability of attachment of the pressure roller station to the support plate contributes. It is preferred that the locking elements comprise a circumferential spring. In the tensioned state, the encircling spring preferably exerts a force inwardly on the locking elements of the locking unit. "The direction" inwards "means within the meaning of the invention that the

Locking elements are pressed in the direction of a central axis of the pressure roller station. This central axis is shown for example in FIG. Thereby, the locking elements are advantageously pressed into a groove which annularly around the inside of the holding device and surrounding pressure pins, by which the movement of an actuating rod is transmitted to the locking elements. This transmission of the movement of an actuating rod and the exertion of the force of the rotating spring on the locking elements advantageously lead to the fact that the diameter of the locking unit can change. Due to the variability of the diameter of the

Surprisingly, a locking unit according to the invention is a particularly stable interaction of the holding device of the pressure roller station with the

Recesses of the support plate allows, which is not only an innovative way of attachment is provided, but a compared to conventional attachment mechanisms attachment that withstands surprisingly high loads.

It is particularly preferred that the individual locking elements can be driven outwards by means of pressure pins, which transmit the up and down movement of a variable diameter operating rod to the locking elements, so that the diameter of the locking unit increases, for example. It is further preferred that the individual

Locking elements of the locking unit in the extended state cooperate with projections within the recesses of the support plate of the rotary press, these projections are preferably designed so that they allow a secure attachment of the pressure roller station in the extended state of the locking elements. It is preferred for the purposes of the invention to refer to these projections preferably as a clamping collar or clamping flange, wherein said terms are used synonymously. A recess in the carrier plate preferably has such a projection in the upper area facing the pressure roller station, the projection preferably representing a region of the reduced diameter recess. Within the meaning of this invention, this region may also be referred to as bottleneck. Surprisingly, a locking unit with variable diameter can be provided, which has a diameter in the untensioned state, which is smaller than the diameter of the bottleneck, whereby the holding device easily and easily into the recess in the

Carrier plate can be inserted. It was also surprising that after the introduction of the holding device in the recess, the diameter of the

Locking unit can be increased by the interaction of an actuating rod with the locking elements so that the holding device can not be removed, for example by pulling upwards, from the recess of the carrier plate.

In particular, the preferred enlargement of the diameter of the locking unit ensures a stable clamping of the individual locking elements to the inner walls of the recess of the carrier plate, as a result of which a particularly stable fixing acting in several directions in space

Pressure roller station is achieved in the interior of the recess of the carrier plate.

In a further preferred embodiment of the invention is the

Height-adjustable means in the sense of this invention means that the locking unit is designed to be movable in particular in the vertical direction and are moved up or down For the purposes of this invention, the spatial direction "downwards" is preferred from the viewpoint of the pressure roller station for a movement of the locking unit in the direction of the carrier plate of the rotary press when the pressure roller station is usually arranged on the carrier plate of the rotary press. For the purposes of this invention, such a movement is preferably referred to as "downward movement" of the locking unit or of the actuating rod, in particular Holding device, the locking unit passes into the recesses of the support plate.

For the purposes of this invention, the spatial direction "upward" preferably denotes an upward movement of the holding device into the interior of the pressure roller station, ie preferably in the direction of the pressure rollers belonging to the pressure roller station, in particular if the holding device is present in the recesses of the carrier plate the movement of the locking unit, that is their height adjustment, by means of a

Actuating realized. The previous comments on the spatial directions are preferably related to the Druckrollenstation. It is preferred that, from the perspective of the carrier plate, the spatial direction "upwards" is characterized by a movement in the direction of the pressure roller station and / or the rotary press The upper side of the carrier plate is thus preferably facing the rotary press and the pressure roller station.

It is preferred that the actuation rod is arranged centrally or centrally in the pressure roller station. "Centered" in the sense of this invention means that the actuation axis is arranged substantially axially symmetrically about a central axis of the pressure roller station, wherein the term "substantially" applies to The average person skilled in the art is not unclear because he knows that pressure roller stations are usually rectangular or circular

Base surface, wherein for such basic shapes usually a mean axis of symmetry can be determined.

In a further preferred embodiment of the invention, the

Actuating rod to the lower end of the actuating rod

tapered diameter on. It is preferred that the actuating rod comprises an upper and a lower region, the upper region in particular having a circular base surface which corresponds to the inner diameter of a pressure roller station. It is preferred that the inner region of the pressure roller station, which preferably serves to receive the actuating rod and whose diameter preferably corresponds to the diameter of the actuating rod, is preferably formed by a hydraulic cylinder, wherein this hydraulic cylinder preferably comprises a two-part piston consisting of an inner and outer piston. It is preferred that the movement of the actuating rod is realized by means of at least this hydraulic connection.

It is further preferred that the actuating rod consists of a lower portion, which initially consists of a tapered portion and merges into a region of constant radius towards the lower end of the actuating rod, wherein this constant radius of the lower portion is smaller than the diameter of the Operating rod in the upper area. The

Design and form of the confirmation bar results in particular by the figures representing the invention.

In a further embodiment of the invention, the diameter of the

Locking unit in a first position at a maximum and in a second position minimal, wherein the diameter of the locking unit by means of a

Actuating rod is variable. As shown in Figure 2, the

Locking elements of the locking unit pressed by the actuating rod to the outside. It is preferred that this happens when the region of the actuating rod is in contact with the locking elements, which has the largest diameter of the actuating rod. It is preferred that the actuating rod cooperate with pressure pins which push the locking elements of the locking unit to the outside. If this happens, for example, within the recesses of the support plate, in particular in a lower region of the recesses below a projection or clamping collar, an effective fastening in the sense of jamming and / or bracing is ensured. This position is within the meaning of the present invention

preferably referred to as the first position or spread position of the locking unit.

A so-called "unlocked" state is preferably characterized in that the actuating rod is also pushed vertically upward, preferably by the upward movement of a pneumatic piston, whereby unlocking of the locking elements is achieved Locking elements even in the unlocked state still engage in the projection of the recess of the support plate. The unlocked state becomes

for example, shown in Figure 3. Preferably, the locking elements are gradually relieved by a preferably stepwise lifting of the actuating rod. For example, it is provided in a first position that the pressure exerted by the locking elements, for example, on the inner wall of the recesses in the carrier plate is reduced. Advantageously, in this position, the pressure roller station can be rotated about its own axis, wherein a displacement or removal of

Pressure roller station from the recess, for example, effectively prevented that the locking unit is still below a clamping collar in the recess of the support plate. As a result, undesired slipping or undesired change of position of the pressure roller station on the carrier plate is surprisingly completely excluded.

A second position in the sense of this invention is preferably according to one

Upward movement of the actuating rod, when at the level of the pressure pins, which are arranged between the locking elements and the actuating rod, the region of the actuating rod is present, which has a reduced compared to the upper portion of the actuating rod diameter. It is preferred that in this second position no direct contact between the actuating rod and the pressure pins of the locking elements is given, so that the locking elements are preferably no longer pressed against the inner walls of the recesses. It is particularly preferred that in this position, the locking elements are released and by the spring force of

circulating spring are pressed into a position with a minimum diameter. For the purposes of the present invention, this position is preferably referred to as the second position or "released" position of the locking unit Tests have shown that the pressure roller station in this position is in accordance with the invention

Holding device can be moved out of the recesses of the support plate surprisingly simple and without unwanted mechanical contact. This is advantageously possible because the locking unit in the dissolved state has its minimum diameter, in particular with the Diameter of the bottleneck formed by the projection corresponds. This state of the locking unit with minimum diameter is preferably referred to as dissolved state and is shown in FIG. In a further embodiment of the invention, the locking elements of the locking unit in the first position are pressed against an inner wall of the recess of the carrier plate. It is preferred that the interior walls of the

Recess formed by a straight wall. In the first position or spread position of the locking elements, the attachment of the

Pressure roller station preferred by the spreading pressure that exert the locking elements on the inner wall of the recess. However, it may also be preferred that the inner wall of the recess is provided, for example with a projection, wherein the inner diameter of the recess in the region of this projection is smaller than in the remaining region of the recess and this

Advantage in the context of the invention preferably as a clamping collar or

Clamping flange is called. It was quite surprising that the provision of protrusions within the recesses enabled effective attachment of the pressure roller station within the recess. In a further preferred embodiment of the invention, the diameter of the locking unit in the second position is smaller than the diameter of the recesses of the carrier plate. It is preferred that the locking elements leave the spread position (first position) due to the spring force exerted by the rotating spring. This advantageously reduces the

Diameter of the locking unit and the locking elements are no longer in contact with the inner wall of the recess.

In a further preferred embodiment of the invention is the

Holding device completely inside the pressure roller station before. It is preferable to refer to this position in the sense of the invention as "rotor change position." In this position, the holding device preferably does not protrude beyond the lower end of the pressure roller station, whereby advantageously a

Displacement and pivotability of the pressure roller station is guaranteed. It was completely surprising that a holding device with a Locking unit can be made so compact that it can be completely absorbed by the pressure roller station and terminates flush with the pressure roller station in the lower area. This is advantageously achieved by the cooperation and engagement of the components of the holding device with the receiving pressure roller station, whereby it is achieved that the holding device in the limited space available in the

Pressure roller station can be introduced.

In a further preferred embodiment of the invention, the movement of the actuating rod is hydraulically, pneumatically, mechanically and / or

electromechanical. A hydraulic movement can be transmitted for example by a hydraulic cylinder, wherein a hydraulic cylinder in the context of the invention is preferably a liquid-operated working cylinder. It is preferable that in the hydraulic cylinder, the energy from the hydraulic fluid supplied from a hydraulic pressure accumulator or a hydraulic pump is converted into an easily controllable, rectilinear force.

A pneumatic cylinder in the sense of the invention is preferably a working cylinder driven by compressed air, which is preferably used for the pneumatic movement of the actuating rod. Electric cylinders are within the meaning of the invention preferably electric motor operated Verstellaggregate, which can extend and retract a linear torque tube preferably linear. It is preferred that the drive of an electric cylinder takes place by means of an electric motor, which is preferably coupled to a transmission. The retraction and extension of the torque tube is preferably carried out by the right- or left-hand rotation of the engine. An electric cylinder may preferably also be provided with a standpipe for guiding and stabilizing the push tube. Advantageously

Electric cylinder suitable for tensile and / or compressive forces.

The advantage of using the mentioned cylinder types is that their

Components can be summarized surprisingly compact. Next, the aforementioned cylinder can be surprisingly space-saving in the

Overall construction of the pressure roller station can be integrated. It is preferred in the sense of the invention that the movement of the movable components of the holding device is realized by means of a first and a second hydraulic connection and a pneumatic connection, wherein preferably the pneumatic connection is arranged in the carrier plate of the rotary press. It is preferred that the diameter of the locking unit is advantageously reduced when the actuating rod is moved by means of the

Pneumatic connection is moved upward and the locking elements are no longer held in the spread position. It is further preferred that the holding device comprises a hydraulic cylinder with cylinder bottom and cylinder cover, wherein the cylinder bottom of the hydraulic cylinder, the upper

Pressure roller station facing completion of the holding device forms and the cylinder cover the pressure roller station closes down on the support plate side facing. It is further preferred that the holding device comprises a two-part piston of an inner and an outer piston, wherein the inner piston comprises the locking elements, which in its entirety, the circular

Form locking unit with variable diameter. It is further preferred that the inner piston, the outer bulb and the actuating rod of the

Holding device are designed to be movable and the movement of the movable components of the holding device by means of a first and a second hydraulic connection and a pneumatic connection takes place. It is further preferred that the cylinder bottom comprises a guide for the actuating rod. It is further provided in a preferred embodiment that the

Holding device comprises at least one compression spring which is arranged between the inner and outer pistons and which is due to the applied spring pressure in a position to reduce the diameter of the locking unit in a surprising manner. As a result, the complete reception of the holding device in the interior of the pressure roller station is advantageously made possible. It is further preferred that the holding device comprises disc springs, whereby a non-positive connection of the locking elements with the inner wall of the recess of the carrier plate is achieved. In a further aspect, the invention relates to a method for fastening a pressure roller station of a rotary press comprising the following steps: a) providing a pressure roller station for a rotary press, wherein the pressure roller station comprises a holding device with a

Locking elements existing locking unit comprising variable diameter, wherein the locking unit is designed to be height adjustable and the holding device initially in the interior

Pressure roller station is present;

b) bringing the pressure roller station designated in a) into contact with a recess of a carrier plate of the rotary press;

c) inserting the holding device in the recess of the carrier plate of the rotary press;

d) fastening of the pressure roller station in the recess of the carrier plate of the rotary press by a downward movement of an actuating rod with a tapered in a lower region diameter.

After completing this procedure, the locking elements are the

Locking unit in a spread position, wherein the locking elements are pressed against the inner walls of the recesses.

In a further aspect, the invention relates to a method for releasing a pressure roller station of a rotary press comprising the following steps: a) provision of a pressure roller station which is fastened in a recess of a carrier plate of a rotary press, the fastening being effected by means of a height-adjustable locking unit consisting of locking elements, their diameter by means of a

Actuating rod is adjustable;

b) releasing the pressure roller station by an upward movement of

Actuating rod, whereby the spread position of the locking elements is unlocked

c) upward movement of the locking unit by another

Upward movement of the actuating rod, so that the holding device in a rotor change position completely in the interior of a pressure roller station is present.

The invention will be described with reference to preferred embodiments and the following figures. In particular, Figures 1 to 6 show a rotary press with a pressure roller station, which has a holding device, wherein the movement of the actuating rod and the operation of

Locking unit is effected by means of a two-part hydraulic cylinder in the lower region of the pressure roller station and a pneumatic cylinder in the recess of the carrier plate.

Figure 1: side view of a preferred embodiment of a

Pressure roller station with a holding device according to the invention

Figure 2: enlarged side view of a preferred embodiment of a holding device according to the invention

Figure 3: side view of a preferred embodiment of the

Inventive holding device with representation of a first step for releasing a spread position of the locking elements

Figure 4: side view of a preferred embodiment of

Holding device according to the invention in the dissolved state

Figure 5: side view of a preferred embodiment of

Inventive holding device in a rotor change position

Figure 6: side view of a preferred embodiment of the pneumatic cylinder in the support plate in its rest position

Figure 1 shows a side view of a pressure roller station (1) as part of a rotary press with an upper (25) and a lower pressure roller (26) through which the pressing forces for producing, for example, a tablet on the

Pressing tools are transmitted. Furthermore, FIG. 1 shows a carrier plate (2) of the rotary press on which the pressure roller station (1) is arranged. The Attachment of the pressure roller station (1) on the support plate (2) by means of a holding device (21), whose structure and operation is shown in the other figures. Figure 1 also shows a central axis (35) and its central position in the interior of the pressure roller station (1) of the rotary press.

Figure 2 shows an enlarged side view of an inventive

Holding device (21) on a support plate (2) of a rotary press

has been arranged. FIG. 2 shows in particular a first position of FIG

Locking elements (10), which is preferably also referred to as Spreizstellung. In this case, the locking elements (10) are clamped in a piston bore (22) within the support plate (2) of the rotary press, said piston bore (22) in the context of the invention preferably also referred to as a recess. The locking elements (10) together form a locking unit (37). By a plate spring package (7) is an inner piston (8) of a two-part

Hydraulic cylinder (3) pushed upward, whereby the locking elements (10) against the lower shoulder of a clamping collar (24) or projection within the recess (22) of the support plate (2) are pressed. The power of

Tellerfederpaktes (7) is preferably transmitted by means of an actuating rod (13) on pressure pins (12) with the locking elements (10) of the

Interlocking unit (37) cooperate. The actuating rod (13) has an upper portion (13 a) and a lower portion (13 b), wherein the diameter of the upper portion (13 a) corresponds to the diameter of the inner region of the pressure roller station (1). The diameter of the upper region (13 a) is in particular greater than the diameter of the lower region (13 b) of the actuating rod (13). The lower portion (13 b) of the actuating rod (13) is formed by a starting from the upper portion (13 a) tapered region and a lowermost region with a constant diameter.

In Figure 2, the pressure pins (12) are in contact with the upper portion (13 a) of the actuating rod (13). The pressure pins (12) are thereby pressed outwards, whereby the locking elements (10) of the locking unit (37) are pressed against the inner wall (31) of the recess (22) in the support plate (2). In the embodiment of the invention shown in Figure 2, the movement of the actuating rod (13) by a pneumatic piston (16), which is present in a bottom region of the piston bore (22). The pneumatic piston (16) has a pneumatic connection (19) and is provided by a pneumatic cylinder (14). and a compressed air chamber (23) surrounded. This compressed air chamber (23) can be filled with compressed air when the pneumatic connection (19) is opened. The pneumatic piston (16) is fastened to the underside of the

Support plate (2) mounted and further comprises a sealing sleeve (15), which closes the compressed air chamber (23) sealing.

As can be seen in Figure 2, there is a contact between the lower portion (13 b) of the actuating rod (13) and the upper portion of the pneumatic piston (16). It can also clearly be seen that in this arrangement there is a free space (30) within the recess (22) of the carrier plate (2) between the lower end (32) of the holding device (21) and the upper region of the pneumatic piston (16) , In the position of the pneumatic piston (16) shown in FIG. 2, the pneumatic connection (19) is not subjected to compressed air.

The locking elements (10) are provided with a circumferential annular spring (1 1), which exerts a spring force on the locking elements (10). This spring force is directed in particular inward, that is, for example, arranged in the direction of the centrally within the pressure roller station (1)

Operating rod (13). The spring force causes the locking elements (10) to move inwardly, thereby reducing the diameter of the locking unit (37) when the pressure pins (12) are not pushed outwardly by an actuating rod (13). Shown in Figure 2 is in particular the locking unit (37), which has its maximum diameter in the spread position. This maximum diameter is in particular greater than that

Inner diameter of a clamping band (24), which also serves as a projection or

Clamping flange is called and forms the upper portion of the recess (22) of the support plate (2).

The upper end of the holding device (21) is formed by a cylinder bottom (5). The upper portion of the holding device (21), which is not designed to be movable and is present in the lower region of a pressure roller station (1), has hydraulic connections (17, 18), which interact in each case with different hydraulic pistons (8, 9). These two hydraulic pistons (8, 9) form an inner (8) and an outer piston (9) of a two-part hydraulic cylinder (3). In the transition region between the hydraulic piston (8, 9) compression springs (6) are arranged. By means of the hydraulic connections (17 and 18), the hydraulic pistons (8, 9) can be moved. The hydraulic cylinder (3) has a cylinder cover (4) as a lower end of the pressure roller station (1) and a cylinder bottom (5) as the upper end of the holding device. Gaskets (20) seal the various working areas within the hydraulic cylinder (3)

up to today.

Figure 3 shows a side view of the holding device (21) according to the invention, in particular a first step to release the spread position of

Locking elements (10), with the attachment of the pressure roller station (1) within the recess (22) of the support plate (2) of the rotary press

is guaranteed. To release the spread position, the compressed air connection (19) is acted upon with compressed air, whereby the pneumatic piston (16) is moved upward, that is in the direction of the pressure roller station (1). By this upward movement of the pneumatic piston (16), the actuating rod (13) is pushed into the inner piston (8) of the holding device (21). The top of the pneumatic cylinder (33) comes to rest against the underside (32) of the holding device (21). By the upward movement of the pneumatic cylinder (16) and thereby caused displacement of the actuating rod (13) in the inner piston (8) of the hydraulic cylinder (3) of the free space (26) is reduced in the upper region of the holding device. By the upward movement of the actuating rod (13) is now the lower portion (13 b) of the actuating rod (13) at the level of the pressure pins (12). This lower portion (13 b) has a smaller diameter than the upper portion (13 a) of the actuating rod (13), whereby now no contact between the pressure pins (12) and the actuating rod (13). The pressure pins (12) are thus now free in their movement, however, the encircling spring (1 1) can not press the locking elements (10) inwards and thus reduce the diameter of the locking unit (37), since the locking elements (10) the cup spring assembly (7) are still pressed firmly against the clamping collar (24). The cup spring pact (7) pulls both the locking unit (37) against the underside of the pressure roller station (1), and the locking elements (10) against the clamping collar (24). Figure 4 shows the side view of a preferred embodiment of

Inventive holding device (21) in the so-called dissolved state. To release the locking elements (10), the chamber (25) for actuating the outer bulb (9) is acted upon by the hydraulic connection (18) with oil pressure. As a result of this oil pressure, the disk spring assembly (7) is pressed downwards by the outer piston (9), this compact state of the disk spring assembly (7) being referred to as "on block." Compression of the disk spring assembly (7) creates a free space (34). In parallel with the pressurization of the chamber (25) with oil pressure through the hydraulic port (18), the oil pressure causes the inner piston (8) to follow the movement of the outer piston (9), simultaneously causing the pneumatic piston (16) is pushed down by the same amount, since the pneumatic pressure is lower than the hydraulic pressure, and this small downward movement of the inner piston (8) releases the

Locking elements (10) of the locking unit (37) of the clamping collar (24). As a result, the locking elements (10) can be pulled inwards into the groove (27) by the tensioned circumferential annular spring (11). The

Holding device (21) of the pressure roller column (1) is no longer tensioned, that is, it is no longer in a spread, but in a released position. The pressure roller station (1) can be rotated in this release position, for example, about its own axis (35), but not manually displaced laterally, since parts of the holding device (21) are still within the recess (22) of the support plate (2) of the rotary press. These located in the recess or the piston bore (22) components of the

Holding device (21) are a manual displacement of the

Pressure roller station (1) against.

Figure 5 shows the side view of a preferred embodiment of

Inventive holding device (21) in a rotor-change position of the holding device (21). This is characterized in that now all the components of the holding device (21) are inside the pressure roller station (1), whereby a decoupling of the pressure roller station (1) of the

Support plate (2) is made possible. For this purpose, first the oil pressure at the hydraulic connection (18) is switched off. At the same time, the air pressure at the pneumatic connection (19) is increased, with the pneumatic piston (16) moving upwards and thereby the inner piston (8) of the hydraulic cylinder (3) with the assistance of the compression spring (6) is pushed completely into the hydraulic cylinder (3). In the highest position of the pneumatic piston (16) within the piston bore (22) is a paragraph with an O-ring seal (20). This paragraph moves in the highest position in the clamping collar (24) and thus reliably closes the opening in the top of the support plate (2). The holding device (21) consumes no energy in this rest position. The pneumatic piston (16) in the support plate (2) can be acted upon by a low air pressure, so that the piston (16) does not drop and the sealing function of the O-ring is maintained.

FIG. 6 shows the pneumatic cylinder (16) in the carrier plate (2) in one

Rest. The pneumatic connection (19) is acted upon with a slight overpressure, so that the pneumatic piston (16) does not drop, so that the

Sealing function of the O-ring (36) remains. The attachment of the

Druckrollenstation (1) takes place practically in reverse order to that just described. After the pressure roller station (1) precisely above a

Clamping position above a recess (22) of a support plate (2) has been placed, the hydraulic port (18) is pressurized. As a result, the inner piston (8) lowers against the pressure of the compression spring (6), wherein the pneumatic piston (16) is pressed down in parallel until the inner piston (8) with its stop on the outer piston (9 ). Subsequently, the oil pressure is increased so that the spring assembly (7) is compressed, whereby a free space (34) is formed and the inner piston (8) can dive slightly deeper into the bore (22) of the support plate (2). Then, the additional hydraulic port (17) is acted upon by oil pressure, whereby the actuating rod (13) in the cylinder bottom (5) is driven down to its stop. By the taper of the actuating rod (13) in a transition region between an upper portion (13 a) and a lower portion (13 b) of the actuating rod (13) presses this during the downward movement of the pressure pins (12) and the associated locking elements (10) outwardly until the locking unit (37) has reached its maximum diameter and the locking elements (10) on the inner wall (31) of the recess (22) abut. Now the oil pressure at the hydraulic connections (17, 18) is switched off. As a result, the plate spring assembly (7) relaxes and pulls over the inner piston (8) Locking elements (10) against the shoulder of the clamping collar (24). As a result, a stable attachment of the pressure roller station (1) within the recess (22) of the support plate (2) is achieved.

LIST OF REFERENCE NUMBERS

I pressure roller station

2 support plate

3 hydraulic cylinders

4 cylinder covers

5 cylinder bottom

6 compression spring

7 plate spring package

8 inner pistons

9 outer bulb

10 locking elements

I I Circumferential ring spring

12 pressure pens

13 operating rod

13a upper portion of the operating rod

13b lower portion of the operating rod

14 pneumatic cylinders

15 sealing collar

16 pneumatic pistons

17 Hydraulic connection P1

18 Hydraulic connection P2

19 Pneumatic connection P3

20 seals

21 holding device

22 piston bore, or recess 23 compressed air chamber

24 clamp collar

25 hydraulic chamber for outer piston (9)

26 hydraulic chamber for inner piston (9), or for

Operating rod (13)

27 groove

28 upper pressure roller 29 lower pressure roller

30 free space within the Aufnehmung (22) between holding device (21) and pneumatic piston (16) 31 inner wall of the Aufnehmung (22)

32 lower termination of the holding device (21)

33 top of the pneumatic piston (16)

34 free space, which results from compression of the plate spring package (7)

35 Central axis of the holding device (21) 36 O-ring

37 locking unit

Claims

claims

1) rotary press, in particular for the production of tablets, with

at least one pressure roller station (1)

characterized in that

the at least one pressure roller station (1) comprises a holding device (21) and a carrier plate (2) of the rotary press at least one recess (22) for receiving the holding device (21)

Pressure roller station (1). 2) Rotary press according to claim 1

characterized in that

the holding device (21) comprises locking elements (10) which in their entirety form an annular locking unit (37) of variable diameter.

3) rotary press according to claim 1 and / or 2

characterized in that

the locking unit (37) is adjustable in height, wherein the height adjustment by means of an actuating rod (13) can be realized, which is arranged centrally in the annular locking unit (37).

4) rotary press according to one or more of the preceding claims, characterized in that

the actuating rod (13) has a diameter tapering in the lower region (13b) of the actuating rod (13).

5) rotary press according to one or more of the preceding claims, characterized in that

the diameter of the locking unit (37) is maximum in a first position and minimal in a second position, wherein the diameter is variable by means of the actuating rod (13).

6) rotary press according to one or more of the preceding claims, characterized in that the locking elements (10) of the locking unit (37) in the first position are pressed against an inner wall (31) of the recess (22) of the carrier plate (2). 7) rotary press according to one or more of the preceding claims, characterized in that

the diameter of the locking unit (37) in the second position is smaller than the diameter of the recess (22) of the carrier plate (2). 8) rotary press according to one or more of the preceding claims, characterized in that

the holding device (21) in a third position completely in the interior of the pressure roller station (1) is present. 9) rotary press according to one or more of the preceding claims, characterized in that

the pressure roller station (1) in the third position both slidably and pivotally on the support plate (2) of the rotary press is present.

10) rotary press according to one or more of the preceding claims, characterized in that

a movement of the actuating rod (13) is hydraulically, pneumatically, mechanically and / or electromechanically feasible. 1 1) Method for fastening a pressure roller station (1) of a rotary press comprising the following steps:

a) providing a pressure roller station (1) for a rotary press, wherein the pressure roller station (1) has a holding device (21) with a

Locking elements (10) comprises locking unit (37) having a variable diameter, wherein the locking unit (37) is designed to be height adjustable and the holding device (21) initially in the interior of the pressure roller station (1) is present;

b) contacting the pressure roller station (1) designated in a) with a recess (22) of a carrier plate (2) of the rotary press; c) inserting the holding device (21) into the recess (22) of the carrier plate (2) of the rotary press;

d) fastening of the pressure roller station (1) in the recess (22) of

Support plate (2) of the rotary press by a downward movement of an actuating rod (13) with a in a lower portion (13b) tapered diameter.

12) A method for releasing a pressure roller station (1) of a rotary press comprising the following steps:

a) providing a pressure roller station (1) which is fastened in a recess (22) of a carrier plate (2) of a rotary press, wherein the

Attachment by means of a height-adjustable, consisting of locking elements (10) locking unit (37) takes place, the diameter of which is adjustable by means of an actuating rod (13);

b) releasing the pressure roller station (1) by an upward movement of

Actuating rod (13), whereby the spread of the

Locking elements (10) is unlocked

c) upward movement of the locking unit (37) by another

Upward movement of the actuating rod (13), so that the holding device (21) in a rotor change position completely inside a

Pressure roller station (1) is present.