EP4051494A1 - Pressure roller station for rotary presses having external axle receptacles for pressure roller units - Google Patents
Pressure roller station for rotary presses having external axle receptacles for pressure roller unitsInfo
- Publication number
- EP4051494A1 EP4051494A1 EP20793727.7A EP20793727A EP4051494A1 EP 4051494 A1 EP4051494 A1 EP 4051494A1 EP 20793727 A EP20793727 A EP 20793727A EP 4051494 A1 EP4051494 A1 EP 4051494A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure roller
- station
- guide profile
- pressure
- axle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003825 pressing Methods 0.000 description 40
- 238000012423 maintenance Methods 0.000 description 16
- 238000013461 design Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
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- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
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- 238000009420 retrofitting Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000013598 vector Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012946 outsourcing Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 230000010355 oscillation Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
- B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
- B30B1/263—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks work stroke adjustment means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/34—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses for coating articles, e.g. tablets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0076—Noise or vibration isolation means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/028—Loading or unloading of dies, platens or press rams
Definitions
- the invention preferably relates to a pressure roller station for rotary presses with a guide profile which can be locked on the rotary press and which comprises two side surfaces on which a pair of upper and lower axle receptacles for pressure roller axles are arranged on the outside, so that two pairs of pressure rollers can be attached to the same guide profile.
- the axle receptacles have a laterally outwardly open shape, particularly preferably a U-shape, and are designed for pivotable mounting of pressure roller axles.
- the invention relates to a rotary tablet press comprising such a preferred pressure roller station.
- the invention relates to the field of rotary presses which are used in the pharmaceutical, technical or chemical industry or in the food industry in order to produce tablets or compacts in large numbers from pulverulent materials.
- rotary presses have a rotor which carries a plurality of pairs of punches, each pair of punches of an upper punch and a
- Lower punch is formed, which are adjustable relative to each other.
- the rotor comprises a die plate in which die openings are provided on a pitch circle at regular intervals, in which the upper and lower punches either interact directly or have insert pieces which are designed in the form of a sleeve and are referred to as dies.
- the material to be pressed is filled into these dies or die openings by means of a filling device.
- the two punches When a pair of punches comes into the area of the filled die or die opening due to the rotation of the rotor, the two punches are moved towards each other by control cams and reach the area of a pressure roller station. In the pressure roller station, the punches are pressed against each other so that the material in the die opening is compressed into a tablet, for example. After completion of the pressing process, both press punches are moved upwards and the tablet is ejected from the die opening or die. The pressing force is transmitted to the pressing tools by means of pressure rollers.
- the pressing tools are also referred to as the upper and lower punches.
- Rotary presses are also known in the prior art in which the pressure rollers are attached separately from one another, for example at the top on a head piece and below on a carrier plate in the base of the rotary press.
- an upper pressure roller is attached to an upper cross member, while a lower pressure roller is fastened separately therefrom to a lower cross member of the machine housing.
- a disadvantage of a separate arrangement of the two pressure rollers is that the pressing forces generated during the pressing process are transmitted directly to both the upper and the lower machine housing.
- the machine housing of the rotary tablet press can for example consist of a machine base on which the carrier plate for the lower pressure roller is located, as well as a head piece to which the upper pressure roller is attached.
- the head piece and the machine base must be connected to one another by 2 to 4 corner spars. In order to withstand the compressive forces, the head piece, the corner spars and the machine base have to be made very massive with high material costs.
- pressure roller stations with guide profiles or guide columns have been proposed in the prior art, which are suitable for receiving a pressure roller pair consisting of an upper and a lower pressure roller.
- Such pressure roller stations are known in the prior art, for example from the documents EP 0 856 394 B1 or EP 0 856 394 B1.
- EP 0 856 394 B1 discloses a pressure roller station for a rotary tablet press, the pressure roller station having a frame which can be locked on the rotary tablet press and which comprises two bearing blocks for the pressure rollers.
- the frame is formed from a guide column and the bearing blocks are arranged on upper and lower pressure roller mounts which are guided by the guide column and can be adjusted relative to one another. It is preferably a cylindrical guide column, the pressure roller receptacles preferably being designed as circular or conical openings for receiving the bearing blocks or pressure roller axles.
- EP 0 856 394 B1 likewise discloses a rotary press with a pressure roller station which consists of a solid guide column with a cylindrical cross section.
- the rotary press according to EP 0 856 394 B1 comprises a massive, flexurally and torsionally rigid base plate for receiving the rotor, the drive and the pressure roller station.
- the carrier plate is held by a base frame of the rotary press by means of elastic bearings, so that the Rotary press can work with low vibration and noise even with high press forces.
- Modern rotary presses are characterized by the fact that, starting from the basic equipment for the production of single-layer tablets, by adding additional modules, the basic press can be converted so that two-layer, three-layer or shell-core tablets can also be pressed.
- These additional modules can be additional printing stations, for example. It has also been shown that the quality of single-layer tablets can be improved if, before the actual tablet production, the press material is vented in a so-called pre-pressure station, which is also formed by a pair of pressure rollers.
- a rotary tablet press is known with a pre-pressure and main pressure station each comprising two pairs of pressure rollers which are attached to a vertical support profile.
- a rotary press according to JP 2006263764 A too, two pairs of pressure rollers, for example for a pre-pressure and main pressure station, can be installed on a vertical support profile.
- the rotary press has an upper support and a support plate. The upper carrier is only supported on the back by the carrier profile, so that better access to the rotor is made possible at the front.
- the support profile for the pressure rollers is characterized by a V-shaped front surface facing the rotor, on which the two pairs of pressure rollers can be arranged next to one another on the rotor circle.
- the pressure roller axles are located within the vertical support. This makes easy access for converting the pressure rollers more difficult.
- the support profile for installing the two pressure roller pairs takes up a relatively large amount of space and is therefore a hindrance to flexible positioning around the rotor.
- individual printing stations can be arranged in different positions within the rotary press in order to enable quick and easy conversion.
- a carrier plate of the rotary tablet press has a large number of recesses. Each of these recesses is equipped with a clamping device with which a printing station can be attached to the desired position.
- the prior art proposed integrating clamping or holding devices into the individual printing stations themselves (WO 2016/156306 A1). As a result, depending on a desired operating mode, a particularly low-maintenance and simple fastening of pressure roller stations at predetermined positions on a carrier plate can take place.
- Another disadvantage of the known printing stations is the increased space requirement, in particular when using several pressure roller stations, for example for the production of two-layer, three-layer or shell-core tablet presses.
- a prepress station in addition to a main printing station, it is also necessary to arrange two pressure roller stations next to one another, which increases the floor space.
- One object of the invention was thus to provide a pressure roller station for rotary presses which eliminates the disadvantages of the prior art.
- the invention relates to a pressure roller station for rotary presses with a guide profile that can be locked on the rotary press, the guide profile comprising two side surfaces, on each of which a pair of upper and lower axle mounts for pressure roller axles are arranged on the outside, so that two pairs of pressure rollers can be attached to the same guide profile are.
- the pressure roller station is characterized by its extremely compact design to accommodate up to four pressure rollers. In this way, for example, a main printing station and pre-printing station can be provided in a very small space. In the case of known pressure roller stations, at least two separate guide profiles or guide columns were usually necessary for this purpose, which must be set up accordingly next to one another around a rotor circle.
- axle mounts By attaching the axle mounts to the two side surfaces of a guide profile, two pairs of pressure rollers can be provided, the space requirement of which is only given by the extent of the pressure rollers themselves.
- the arrangement of pairs of upper and lower axle mounts ensures a large capacity to absorb press forces generated by the pressure rollers installed in the axle mounts. Since the pairs are each present on one side surface, the same can particularly effectively compensate for the opposing pressing forces. In addition, it has been shown that transverse forces or vibrations between the two pressure roller pairs attached to the side surfaces of a guide profile are also compensated.
- the pressure roller station has excellent overall stability, even during independent pressing processes by means of side-mounted pressure roller pairs. With the pressure roller station, it is thus possible to provide two independently acting pressure roller pairs or pressing units in a small space, which are low in vibration and low in noise even with high pressing forces.
- the pressure roller station is characterized in that a first pair of lower and upper pressure rollers are attached to a first side surface of the guide profile, which form a pre-pressure station and a second pair of lower and upper pressure rollers are attached to a second side surface, which are a Form main printing station.
- pre-pressure station and main pressure station have the usual meanings in the prior art and preferably each comprise pairs of pressure rollers for imparting a pressing force to the pressing tools.
- pre-pressure station prior to the actual tablet production, the pressing of the material in the main pressure station ensures that the press material is vented. This increases the quality assurance of the pellets.
- the pre-printing station is thus characterized by low immersion depths and / or pressing forces compared to the main printing station.
- the components for a main printing and pre-printing station can advantageously be accommodated in a very confined space, so that rotary presses can be constructed with extremely small dimensions.
- a pressure roller station for flexible integration of up to four pressure rollers, a rotary press with maximum functionality can be provided on a minimal footprint. It is possible to integrate preprinting and main printing stations as well as providing two printing rollers for multi-shift operation within one printing roller station.
- the attachment of the axle mounts for the pressure rollers on the outer side surfaces also ensures good accessibility.
- various pressure rollers can be assembled or disassembled quickly and easily.
- the installation and removal of the entire pressure roller station is not necessary for this. Instead, the pressure roller axles can be installed and removed from the axially accessible axle mount.
- the provision at the side also makes the provision of pivotable pressure roller axles for maintenance or replacement available the axis supports.
- the pressure roller station thus allows a particularly high degree of flexibility for the needs-oriented use of modern rotary presses.
- an axis receptacle preferably denotes a component which is designed to mount a pressure roller axis or a bearing axis for other components of a rotary tablet press in the guide profile.
- the axis receptacles preferably comprise a receiving section or a receiving surface for locking a pressure roller or bearing axis and a bearing section or bearing block for guiding the axis receptacle within the guide profile.
- the storage section is preferably located within the guide column, for example on guide rails.
- the receiving section or the receiving surface points laterally outwards and is therefore easily accessible.
- axle mounts are preferably in the form of monoliths in order to withstand the highest loads as massive components, but composite axle mounts are also conceivable. Due to the preferred suitability for receiving pressure roller axles, the axle receptacle can also be referred to as a pressure roller receptacle.
- the axle receptacle or its receptacle section has a laterally open profile, which can have, for example, U-shaped, arched, V-shaped, trapezoidal or other open polygonal shapes in cross section.
- the receiving surface can preferably be adapted to the shape of the pressure roller axles or bearing axles to be installed.
- the axle receptacle can also have laterally closed profiles, for example it is conceivable to provide a receptacle section with a bore with, for example, a rectangular or circular cross-section for introducing the pressure roller axles.
- a fixing plate with corresponding locking means for installing pressure roller axles is also conceivable.
- the axle mounts are constructed identically in order to attach a particularly simple structurally identical bearing axle with possibly different pressure rollers to the different axle mounts.
- the axis receptacles differ from one another.
- the pair of axle receptacles on a respective side surface could be structurally identical, but differ from the axle receptacles on the other side surface.
- Upper and lower axis mountings on the respective side surfaces could also be structurally identical, but differ from their counterpart, or three axis mountings are structurally identical, while a fourth axis mount has a special function.
- the axle mounts thus convey the attachment of the pressure roller axles to the guide profile, with the axle mounts themselves preferably being mounted so as to be displaceable in the guide profile.
- the guide profile preferably represents the basic structure or the support structure of the pressure roller station and serves to support or guide the axle mounts.
- the guide profile preferably has the shape of a column.
- guide profile and guide pillars are preferably used synonymously.
- the guide profile is thus a free-standing support element or support column with a vertical height that allows the simultaneous attachment of a pair of upper and lower pressure rollers.
- the pressing forces that occur in the pressing process preferably remain in the guide column.
- the pressing forces occurring in the pressing process can preferably be absorbed by the respective adjusting spindles, which adjust the height of the upper and lower pressure rollers continuously.
- the effective pressing forces remain within the guide column and do not get into the carrier plate or the machine housing. This avoids the entire frame of the tablet press being exposed to the pressing forces during the pressing process. This enables a less massive design of the base while saving material.
- the frame components such as the top plate, multifunctional column and base, are not excited to vibrate, which, if the frequencies are in the audible range, can lead to noise pollution.
- the guide profile is preferably designed as a solid component.
- it can be manufactured from metals in a cast form.
- the height of the guide profile is specified by the desired distance between the upper and lower pressure rollers, the guide profile preferably having lower and upper openings in the side surfaces to accommodate the axle mounts.
- the guide profile is preferably characterized by the presence of two side surfaces, which are preferably not parallel or perpendicular to one another. Instead, the side surfaces preferably enclose an angle which is preferably selected such that pressure roller pairs that can be attached to the side surfaces act on a rotor pitch circle.
- the cross section of the guide profile can thus preferably resemble a circular ring segment in sections, with the two two side surfaces forming the legs.
- the front or rear of the guide profile can - like a circular ring segment - be designed as a circular arc.
- the front side facing the rotor will have a smaller radius than the rear side facing away from the rotor.
- the front side of the guide profile facing the rotor can, for example, have two surfaces that are at an angle to one another, while the one facing away from the rotor
- the back can be formed by three surfaces. It is also conceivable that the front and back are designed in cross section as a straight connecting line between side surfaces, so that the front and back each form a flat surface.
- the guide profile is preferably not solid, but has cavities for guiding the axle mounts and possibly other components.
- the stability of the guide column is thus largely determined by the side surfaces as well as the front and rear and preferably a central web. Inner stabilizing walls or struts which connect the front, rear and / or side surfaces to one another (central web) are preferred and lead to a more even distribution of the pressing and bending forces.
- the guide profile preferably has a front surface facing the rotor, a rear surface facing away from the rotor and at least two side surfaces on which the axle receptacles are located on the outside.
- the at least two side surfaces form legs of an angle which is in the range from 10 ° to 120 °, preferably from 20 ° to 80 °.
- Intermediate ranges from the aforementioned ranges can also be preferred, such as, for example, 10 ° to 20 °, 20 ° to 30 °, 30 ° to 40 °, 40 ° to 50 °, 50 ° to 60 °, 60 ° to 70 °, 70 ° up to 80 °, 80 ° to 90 °, 90 ° to 100 ° or 110 ° to 120 °.
- the aforementioned range limits can also be combined in order to obtain further preferred ranges, such as, for example, 30 ° to 60 °, 20 ° to 70 ° or 50 ° to 80 °.
- the side surfaces preferably form the legs of an angle, the side surfaces not having a common contact edge. Instead, the side surfaces can rather form the legs of an imaginary circular ring segment, the side surfaces being connected to one another by a front and a rear. As explained above, the front and back can be angular, multi-surface or round, curved.
- the angle is preferably given by the desired pitch circle of the rotor and the dimensions of the pressure roller axes and pressure rollers.
- double-sided arrangement of pressure roller pairs on the side surfaces - for example to provide a pre-printing station and a main printing station - these are preferably to be arranged so that the pre-pressure and main pressure rollers are centered over the rotor pitch circle of the punch or die bores.
- the pressure rollers may not fit next to each other or would touch.
- the pressure roller station will cover a large part of the rotor circle.
- the preferred orientation of the side surfaces of the guide profile can alternatively also be characterized by the normal vectors which are on the side surfaces.
- the guide profile is characterized in that the normals standing on the at least two side surfaces each form tangents to a circle, the diameter of which can preferably be selected larger than a diameter of a rotor of the rotary press.
- the normals to the side surfaces are usually understood as vectors which are perpendicular to the surfaces and whose origin lies in the center of the side surfaces.
- the circle on which the side surfaces are preferably perpendicular does not correspond to the rotor pitch circle on which the attached pressure rollers act. Rather, the circle predetermined by the side surfaces will preferably be larger than the rotor pitch circle, since the pressure rollers are installed from the side surfaces inwards towards the rotor.
- the circle formed by the normal vectors can have a diameter that is approximately half the length of the pressure roller axis or more (see, inter alia, FIG. 2).
- the upper and lower axle receptacles are present on the respective side surfaces and can be adjusted with one another and / or against one another in the guide profile.
- there can be guide rails within the guide profile for example, on which the pairs of axle mounts can be displaced with one another and / or against one another, e.g. by means of adjusting spindles and a drive motor.
- the upper and lower axle mounts of the respective pairs can be adjusted individually and independently of one another vertically, i.e. along the height of the guide profile.
- an adjusting drive to set the respective upper axle receptacle or upper pressure roller and thus the immersion depth of an upper punch acted upon by the upper pressure roller.
- the upper and lower pressure roller mounts can advantageously be adjusted not only independently of one another, but also with one another.
- the parallel adjustment of the two axis mountings with the same distance from one another enables the press zone to be adjusted. In this way, the area within a die opening in which the pressing of the powdery pressing material takes place can be varied.
- different positions of the inside of the die sleeve can be traversed in order to adjust it equally to stress and wear out.
- the vertical divisibility of the pressing zones is advantageous for the precise pressing of different layers in a multi-layer tablet.
- the guide rails within the guide profile, on which the upper and lower axis receptacles can be displaced vertically with one another and / or with respect to one another.
- the guide rails and the axle receptacles are preferably matched to one another with an exact fit.
- a dovetail guide may be preferred in order to minimize lateral play.
- the upper and lower axle mounts are arranged on a common sliding guide plane, which is predetermined by the guide rails.
- the axis mounts slide, for example, as a carriage on the common sliding guide plane.
- Flat guides can preferably be used as sliding bearings, which are particularly preferably designed to be adjustable in terms of their design.
- the axis mounts are adjusted in the guide profile, preferably by means of adjusting drives, with adjusting spindles being particularly preferably used.
- the pressure roller station comprises adjusting spindles, which are present for shifting the axis receptacles within the guide profile.
- the adjusting spindles can preferably be threaded spindles, in particular ball screw spindles, the axis receptacles being mounted on them as sliding carriages.
- a rotary movement of the adjusting spindles can be used to set the vertical position of the axis mounts and therefore the pressure rollers particularly precisely.
- a rotary motor can be used, if necessary together with a gear.
- the adjusting spindles are present together with the rotary motors within the pressure roller station itself, so that no connections have to be loosened when the pressure roller station is moved and / or removed. Due to the laterally accessible pressure roller mounts or axle mounts, this is advantageously not necessary.
- the pressure roller station can be permanently installed on a carrier plate.
- axle mounts which have a laterally outwardly open shape.
- Laterally open to the outside preferably refers to the guide profile and means that lateral removal and / or pivoting of the mounted pressure roller axis is made possible.
- axle receptacles laterally outwards i.e. in the direction facing away from the side surfaces
- the receiving surface preferably has opposing surfaces both upwards and downwards. Also on the inside (i.e. in the direction facing the guide profile) there is preferably a delimitation against which the pressure roller axles can be attached in a non-positive and / or form-fitting manner.
- the axle receptacles have a U-shaped receiving surface in cross section, so that a cuboid-shaped pressure roller axle can be locked in the axle receptacles in a non-positive and / or form-fitting manner.
- the U-shape is preferably open laterally to the outside in the sense of the above description.
- Such a U-shape is particularly suitable for receiving and fixing essentially cuboid pressure roller axles or cuboid bearing axles for other components of a tablet press.
- the cuboid axes are present on three boundary surfaces: an upper side, a lower side and an inner side (to the guide profile). It is particularly preferred that the top and bottom are parallel to one another and are each at a right angle to the inside of the inside. The transitions or corners can be beveled or rounded.
- the U-shape ensures that press forces acting upwards and downwards in particular are stably absorbed in the axle mount. In addition, rotational play of a pressure roller axle in the axle holder can be prevented reliably and with little wear.
- the term U-shaped preferably also includes an essentially straight U-shape with possibly inclined or rounded corners.
- the axle receptacle has means for a bearing of a pressure roller axle that can be pivoted laterally outward.
- the axis receptacle is preferably designed in such a way that the pivot point when the pressure roller axis is installed lies in a rear area of the axle mount and thus outside the guide profile.
- the axle receptacle can have opposite bores in a rear area, so that a pressure roller axle or bearing axle can be rotatably or pivotably mounted by means of a pivot pin.
- the pressure roller axis or bearing axis preferably has corresponding bores for the pivot pin.
- the pivot point of the pressure roller axis is preferably determined by the bores for receiving the pin.
- Other design variants for swivel joints are also conceivable, their pivot point likewise preferably being arranged in a rear area of the axle mount in order to enable the pressure rollers to be easily pivoted out of a pitch circle of the rotor.
- the axis receptacle can preferably also comprise releasable locking means, so that play around the pivot axis is prevented during operation of the rotary press.
- a pressure roller axle can preferably be locked firmly in a front area of the axle receptacle by means of a clamping bolt.
- a wedge which is inserted into the pressure roller axis from the rear, for example, an additional backlash-free attachment can be ensured.
- the clamping bolt can be loosened so that the pressure roller axle is only attached to the axle holder via a swivel joint in the rear area.
- Toolless fastening means are particularly preferably used, which can be easily and safely released or closed manually without the use of (special) tools.
- the pivotable mounting on the guide profile allows particularly simple maintenance, replacement or conversion of pressure rollers or other components mounted in the axle mounts, e.g. a rotor removal arm.
- the pressure rollers mounted on the side of the guide profile can be individually pivoted outward for assembly or disassembly.
- the retooling or maintenance of the individual pressure rollers can be carried out quickly and quickly by one person in an ergonomically exemplary position. Personnel and costs can be reduced considerably.
- Such pressure roller stations are thus characterized by the highest flexibility for demand-oriented use. For example, for use cases with different required pressing forces according to pressure roller axes can be effortlessly introduced with optimized sensitivity.
- the pivotability leads to a particularly wide application potential of the axle mounts.
- the support or lifting arms for the rotor have the same dimensions as a pressure roller axis, at least in sections.
- the support or lifting arms for the rotor can be locked in a non-positive and / or form-fitting manner in the axle mounts so as to be pivotable. Additional pivoting or lifting devices are not required.
- the axle mounts of the pressure roller station cannot be used multifunctionally to support various pressure rollers, but rather other components such as pressure holding rails or even an entire rotor.
- the at least two, preferably at least four, axis receptacles with means for pivoting mounting thus open up a large number of design variants and the provision of highly flexible rotary presses.
- the rotary presses according to the invention can thus not only cover the entire spectrum of pressing variants, but are also characterized by a user-friendly, compact design.
- the preferred laterally open axle mounts also offer a number of advantages for providing a guide profile with at least one side surface and a pair of axle mounts for receiving pressure roller axles.
- the invention therefore also relates to a pressure roller station for rotary presses with a guide profile which can be locked on the rotary press and which comprises at least one side surface on which a pair of upper and lower axle mounts for pressure roller axles are arranged on the outside, the axle mounts having a laterally open profile and preferably comprise means for the pivotable mounting of a pressure roller axle.
- a pressure roller station with at least two axis mounts does not necessarily offer the possibility of integrating up to four pressure rollers.
- the provision of the external, laterally open profiles of the axle mounts, as described already offers a number of advantages.
- axle mounts such as, for example, a U-shaped cross section for the mount cuboid pressure roller axles or the use of a swivel joint or pivot pin in a rear area of the axle mount.
- the pressure roller station can be provided together with at least two, preferably at least four, six, eight or more pressure roller units and / or one or more pressure rail units.
- a pressure roller unit preferably denotes a unit comprising a pressure roller and a pressure roller axle.
- a pressure rail unit preferably denotes a unit comprising a pressure holding rail and a bearing axis for the pressure holding rail.
- the axes of the pressure roller units or pressure rail units preferably have at least some sections of identical dimensions, which are designed to fit the axis receptacles precisely.
- the pressure roller axes can differ, for example, in terms of their sensitivity or the pressure roller installed on them.
- Pressure retaining rails with different lengths or shapes can also be provided on identical bearing axles.
- two, preferably four, of the pressure roller units and / or pressure rail units are selected and installed on the guide profile.
- the pressure roller station is additionally provided together with at least one bearing axle for a rotor or maintenance equipment, which is preferably designed at least in sections to fit precisely for one of the axle receptacles.
- the bearing axle can preferably have, for example, a section which is dimensioned identically to the section of the pressure roller axles which is designed to fit the axle receptacle precisely.
- axle receptacle is, for example, U-shaped and the pressure roller axles are cuboid, it will be preferred to provide a bearing axis likewise cuboid with identical dimensions.
- the bearing axis can preferably be a support arm or lifting arm, which is also configured at one end for attachment to a rotor or maintenance equipment.
- the pressure roller station comprises sensors for measuring the pressing force.
- the pressure roller axles are preferably equipped with strain gauges to determine the pressing force.
- strain gauges are preferably measuring devices for detecting expanding and / or compressing deformations.
- strain gauges it is preferred that they change their electrical resistance even with slight deformations, which is why they are particularly suitable as strain sensors. It is preferred that they be applied in any suitable manner known to those of ordinary skill in the art on components that deform minimally under load. This deformation or expansion advantageously leads to a change in the resistance of the strain gauge bridge.
- the provided the lower pressure roller axis with such a strain gauge it can also be preferred that the upper pressure roller axis or both pressure roller axes are provided with strain gauges.
- the strain gauges preferably cover a force range from 20 to 200 kN in stages.
- the invention relates to a rotary tablet press comprising a described pressure roller station.
- the rotary press according to the invention is of the type of rotary press, as described in the beginning, are sufficiently known in the prior art.
- the rotary press is therefore characterized by a rotor, comprising an upper and lower punch guide for receiving punches and a die plate with die openings for receiving the powdery material. After the die openings have been filled by a filling device, the interaction of the upper and lower punches allows the material to be pressed into a pellet or tablet.
- upper and lower pressure rollers which are installed in the described pressure roller station, are particularly preferably provided.
- the rotary press thus comprises a pressure roller station according to the invention or preferred embodiments thereof for acting on the punches.
- the person skilled in the art recognizes that preferred embodiments and advantages which have been disclosed in connection with the pressure roller station apply equally to the rotary press as claimed.
- the rotary press comprises a prepress station and a main printing station, the upper and lower pressure rollers of the prepress station being attached to a first side surface of the guide profile and the upper and lower pressure rollers of the main printing station being attached to a second side surface of the guide profile.
- the upper and lower pressure rollers are preferably installed on pressure roller axles, which can be inserted into the axle receptacles as described.
- the pressure roller axles are particularly preferably pivotably mounted so that the pressure roller units can be pivoted laterally out of the interior of the press for maintenance or retrofitting purposes or for rotor replacement.
- the rotary press is characterized by a rotor which comprises a receptacle for a support arm, which can be inserted in one of the axis receptacles, so that the rotor can be pivotably attached to the guide profile via the support arm.
- the axis receptacles of the pressure roller station can advantageously also be used for the pivotable locking of further components of the rotary tablet press.
- a multifunctional use for the removal, repair, cleaning and / or maintenance of the rotor is particularly preferred. From EP 2 110 231 A2 it is known, for example, to pivot a rotor out of the press room by means of a separate support arm.
- the rotor In its operating position, the rotor is frictionally connected to the drive or the counter bearing at the end. For dismantling, the rotor is connected to a support arm and swiveled outwards around a column of the press that has been set up for this purpose. To raise or lower the rotor, a lifting device is preferably provided, which can be integrated in the support arm or in the column.
- a simple bearing axle or a support arm can be connected to the rotor on one side, preferably at the end, and can be pivotably mounted in the axle receptacle on the other side.
- a pivot pin for example, which, as described above, is preferably guided through bores in the rear region of an axle receptacle, is suitable as a swivel joint.
- the adjustment drives of the axle mount can be used to raise or lower the rotor.
- the multifunctional usability of the pressure roller station therefore allows a particularly slim design without sacrificing desirable properties. This not only reduces the weight and the costs of manufacturing the rotary presses, but also their maintenance and repair requirements.
- axle mounts Due to the multifunctional usability of the axle mounts, a large number of construction variants are conceivable. For example, it can be preferred to replace a pressure roller unit with a combined press and pressure holding rail in the area of a pre-print.
- the rotary press therefore comprises a main printing station, wherein upper and lower pressure rollers of the main printing station are attached to a second side surface S ⁇ and wherein a pressure holding rail is attached to one of the axis receptacles of the first side surface of the guide profile.
- the first side face preferably denotes that side face which is passed through first in the direction of rotation of the rotor (area of the pre-print), while the second side face accommodates components connected downstream in the direction of rotation (area of the main printing station).
- the pressure roller station is stored on a carrier plate.
- the carrier plate preferably denotes a massive, flexible and torsion-resistant plate on which the components of the rotary press are mounted.
- the carrier plate can represent the upper end of a drive base of the rotary tablet press, while the lower end of a drive base towards the floor is referred to as the base plate.
- the pressure roller station is particularly preferably connected via a fastening flange to a central tensioning unit and / or to connecting means, preferably screws, along the circumference of the guide profile of the carrier plate.
- the side-mounted pressure rollers are easily accessible from the side and, in a preferred embodiment, can also be easily pivoted individually.
- the pressure roller station is therefore permanently installed on a carrier plate, the fixed installation meaning in particular that it is not possible to move or pivot without tools.
- the rotary press comprises a motor and / or gearbox for the axial adjustment of the axis receptacles in the guide profile, the motor not being installed within the pressure roller station, but preferably located below a carrier plate on which the pressure roller station is mounted.
- the outsourcing of a motor for the adjustment drives of the axle mount leads to a particularly compact pressure roller station in which, for example, only adjustment spindles are located, which are connected to the motor via corresponding connections.
- the motor itself can preferably be located in the drive base below the carrier plate.
- pressure roller stations are typically designed as self-sufficient elements whose connection to the carrier plate for expansion, pivoting or displacement is designed to be quickly detachable. This is not necessary for the pressure roller station according to the invention, so that connections between adjusting spindles and a motor or gearbox that are complex to loosen can also be dispensed with. This leads to greater structural flexibility, which means that extensive components can be relocated from the pressure roller station to the drive base.
- FIG. 1 Schematic representation of a preferred pressure roller station. Left: without pressure roller units. Right: with pressure roller units
- FIG. 2 Schematic representation of a cross section of a preferred pressure roller station with external pressure roller units on both sides
- FIG. 3 Schematic representation of a cross section through a preferred guide profile
- FIG. 4 shows a schematic representation of a detailed view of a preferred axle mount.
- 5 shows a schematic representation to illustrate the pivoting of a pressure roller unit out of an axle mount.
- FIG. 6 shows a schematic representation to illustrate the removal of a pressure roller unit from an axle receptacle.
- Fig. 7 Schematic representation of a pressure roller station with a combined press and pressure holding rail in the area of the form
- FIG. 8 Schematic representation to illustrate the use of an upper
- FIGURES Figure 1 shows a schematic representation of a preferred embodiment of the pressure roller station 1.
- the pressure roller station 1 is characterized by a guide profile 3 which comprises two side surfaces 5, on each of which a pair of upper and lower axle mounts 7 for pressure roller axles 13 are arranged on the outside, so that two pairs of pressure rollers 11 or pressure 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 axle mounts 7. As a result, the pressing forces occurring in the pressing process are absorbed by the guide profile 3 and the adjustment spindles themselves.
- On the left the pressure roller station 1 is shown without pressure roller units 14; on the right with pressure roller units 14, which are installed in the axle mounts 7.
- the pressure roller station 1 is thus characterized by an extremely compact design, whereby, for example, a main printing station and pre-printing station can be provided in a very small space
- FIG. 2 shows a schematic representation of a cross-section of a preferred pressure roller station 1 with pressure roller units 14 lying outside on both sides, as is desirable, inter alia, for providing a pre-printing station and main printing station.
- the axis receptacles 7 are designed to support or guide a pressure roller axis 13 or a bearing axis for other components in the guide profile 3.
- the axle receptacles 7 comprise a receptacle section 9 for locking a pressure roller or bearing axle 11 and a bearing section 8 for guiding the axle receptacle 7 within the guide profile 3.
- the bearing section 8 is preferably located within the guide profile 3 on guide rails 21 , while the receiving section 9 points laterally outwards and is therefore easily accessible.
- a vertical adjustment of the axle mounts 7 takes place in the guide profile 3, preferably by means of adjusting drives or the preferably illustrated adjusting spindles 23.
- an adjusting drive to set the respective upper axle receptacle or upper pressure roller and thus the immersion depth of an upper punch acted upon by the upper pressure roller.
- a lower axis holder or lower pressure roller can preferably be adjusted relative to the upper axis holder or upper pressure roller by means of a further adjusting spindle in order to determine the web height of the tablets to be produced.
- the upper and lower pressure roller mounts can also be adjusted with one another, for example to effect an adjustment of the pressing zone.
- FIG. 3 shows a schematic representation of a cross section through a preferred guide profile 3.
- the guide profile 3 is preferably characterized by the presence of two side surfaces 5, which are preferably not parallel or perpendicular to one another. Instead, the side surfaces 5 preferably enclose an angle 27, which is preferably selected such that pressure roller pairs that can be attached to the side surfaces act on a pitch circle of the rotor.
- the cross section of the preferred guide profile 3 resembles a circular ring segment in sections, the two side surfaces 5 forming the legs.
- the front side 19 and rear side 17 can have a straight cross-section in sections and simulate the arc shape of the circular arc.
- the front side 19 facing the rotor has a smaller radius than the rear side 17 facing away from the rotor.
- the illustrated front 19 of the guide profile 3 is characterized by two surfaces, while the rear 17 has three surfaces.
- the guide profile 3 is not solid, but has cavities for guiding the axle mounts 7 and integrating other components, such as the adjustment drives (see FIG. 2).
- FIG. 4 is a schematic representation of a detailed view of a preferred axle mount 7.
- the axle mount 7 is clearly distinguished by a laterally open profile which is U-shaped in cross-section, so that a cuboid pressure roller axle 13 can be installed in a non-positive and / or positive manner.
- the axle receptacle 7 has means for a laterally outwardly pivotable mounting of the pressure roller axle 11, the pivot point being in a rear region of the axle receptacle 7 and thus outside the guide profile 3.
- opposite bores are provided in a rear region of the axle receptacle 7, through which a pivot pin 29 can be guided for the pivotable mounting of the pressure roller axle 13.
- the pressure roller axle In a front area of the axle receptacle 7, the pressure roller axle is firmly locked in the swiveled-in state by means of a clamping bolt 33.
- a wedge 31 which is inserted into the pressure roller axle 11 from the rear, fixation without play can also be ensured.
- the wedge 31 and clamping bolt 33 can be released so that the pressure roller axle 11 is only attached to the axle receptacle 7 via the swivel joint or the pivot pin 29 in the rear area.
- FIG. 5 shows a schematic representation to illustrate the pivoting of the pressure roller unit 14 out of an axle mount 7. While the upper pressure roller unit 14 is firmly installed in the upper axle mount 7 by means of wedge 31 and clamping bolt 33, the lower pressure roller unit 14 was made from the lateral open profile of the Axle holder 7 pivoted.
- FIG. 5A shows a plan view
- FIG. 5B shows a perspective view.
- pivot pin 29 can furthermore be removed, as shown in FIG. 6.
- the laterally pivotable attachment thus allows pressure roller units to be mounted or dismantled in a quick and simple manner as required. An installation or removal of the entire pressure roller station 1 is not necessary for this.
- the axis receptacle 7 of the pressure roller station 1 can advantageously also be used for the pivotable locking of further components of a rotary tablet press.
- a pressure roller unit with a combined press and pressure holding rail in the area of a pre-print.
- the pressure roller station 1 shown in FIG. 7 therefore comprises a pressure rail unit 39, comprising a pressure holding rail 37 and a bearing axle or pressure roller axle 11, in the lower axle receptacle 7 of the first side surface of the guide profile 3.
- a multifunctional use of the pressure roller station 1 for the removal, repair, cleaning and / or maintenance of a rotor 25 is particularly preferred.
- FIG. 8 represents a schematic representation to illustrate the use of an upper axle mount 7 of the pressure roller station 1 for pivoting out a rotor 25.
- the rotor 25 comprises a receptacle 47 or fastening means for a support arm 45, which can be inserted in one of the axle receptacles 7, so that the rotor can be attached to the guide profile 3 in a pivotable manner via the support arm 45.
- a pivot pin is used as the swivel joint, which is guided in the rear area through bores in the support arm 45 of the axle receptacle 7.
- FIG. 8A shows the pivoted-in state
- FIG. 8B shows the pivoted-out state, for example for cleaning or maintenance purposes.
- the adjustment drives of the axle mount 7 can advantageously be used for raising or lowering the rotor 25.
- a separate column fixed to the frame or a separate lifting device are no longer necessary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Press Drives And Press Lines (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Formation And Processing Of Food Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19206134 | 2019-10-30 | ||
EP20153512 | 2020-01-24 | ||
PCT/EP2020/080231 WO2021083929A1 (en) | 2019-10-30 | 2020-10-28 | Pressure roller station for rotary presses having external axle receptacles for pressure roller units |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4051494A1 true EP4051494A1 (en) | 2022-09-07 |
EP4051494B1 EP4051494B1 (en) | 2023-10-04 |
Family
ID=72964735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20793727.7A Active EP4051494B1 (en) | 2019-10-30 | 2020-10-28 | Pressure roller station for rotary presses with external shaft mounts for pressure roller units |
Country Status (6)
Country | Link |
---|---|
US (1) | US20220410518A1 (en) |
EP (1) | EP4051494B1 (en) |
JP (1) | JP7394988B2 (en) |
KR (1) | KR20220088878A (en) |
CN (1) | CN114641390A (en) |
WO (1) | WO2021083929A1 (en) |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1757370A (en) * | 1926-07-28 | 1930-05-06 | Kilian Fritz | Apparatus for pressing pulverulent substances into boxes |
JP2930147B2 (en) * | 1991-06-24 | 1999-08-03 | 日本板硝子株式会社 | Press roll device |
JP2519875B2 (en) * | 1994-07-04 | 1996-07-31 | 株式会社菊水製作所 | Rotary powder compression molding machine |
DE19705092C1 (en) | 1997-01-31 | 1998-03-26 | Korsch Pressen Gmbh | Press roller for rotary tablet making machine |
JP2005533563A (en) * | 2002-07-19 | 2005-11-10 | エスエムアイ インコーポレイテッド | Method and apparatus for manufacturing miniature tablets |
DE102004040163C5 (en) | 2004-08-19 | 2009-06-18 | Fette Gmbh | Rotary tablet press |
JP2006263764A (en) | 2005-03-23 | 2006-10-05 | Mori Machinery Corp | Rotary type powder compression molding machine |
JP4735029B2 (en) * | 2005-05-11 | 2011-07-27 | 日産自動車株式会社 | Press device |
DE102009002449B4 (en) | 2008-04-18 | 2022-12-22 | Korsch Ag | Rotary tablet press |
JP5184969B2 (en) | 2008-05-28 | 2013-04-17 | モリマシナリー株式会社 | Rotary press |
DE102009020196A1 (en) * | 2009-05-07 | 2010-11-11 | Korsch Ag | Rotary press, in particular for the production of tablets |
DE102011101291B4 (en) | 2011-05-10 | 2014-01-23 | Fette Compacting Gmbh | Printing device for a press and rotary press |
JP6294975B2 (en) * | 2014-05-07 | 2018-03-14 | コルシュ アーゲー | Pressure roller station of a rotary press with two pressure roller shafts incorporating pressure rollers |
EP3072675A1 (en) * | 2015-03-27 | 2016-09-28 | Korsch AG | Rotation press with at least one pressure roller station that can be attached to a support plate and method for fixing and releasing the pressure roller station |
CN205498123U (en) * | 2016-03-08 | 2016-08-24 | 荆门秸宝新能源有限公司 | Extrusion actuating mechanism on biomass solidified fuel production line |
JP6689407B2 (en) | 2016-12-12 | 2020-04-28 | 株式会社Iro | Punch member, die member and rotary press machine |
-
2020
- 2020-10-28 KR KR1020227016692A patent/KR20220088878A/en not_active Application Discontinuation
- 2020-10-28 WO PCT/EP2020/080231 patent/WO2021083929A1/en active Search and Examination
- 2020-10-28 JP JP2022525273A patent/JP7394988B2/en active Active
- 2020-10-28 CN CN202080076704.0A patent/CN114641390A/en active Pending
- 2020-10-28 US US17/771,262 patent/US20220410518A1/en active Pending
- 2020-10-28 EP EP20793727.7A patent/EP4051494B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN114641390A (en) | 2022-06-17 |
EP4051494B1 (en) | 2023-10-04 |
KR20220088878A (en) | 2022-06-28 |
JP2023501946A (en) | 2023-01-20 |
WO2021083929A1 (en) | 2021-05-06 |
JP7394988B2 (en) | 2023-12-08 |
US20220410518A1 (en) | 2022-12-29 |
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