WO2019145097A1 - Verstellbare vordruckschiene für rundlaufpresse mit integrierter messung der vordruckkraft - Google Patents
Verstellbare vordruckschiene für rundlaufpresse mit integrierter messung der vordruckkraft Download PDFInfo
- Publication number
- WO2019145097A1 WO2019145097A1 PCT/EP2018/085762 EP2018085762W WO2019145097A1 WO 2019145097 A1 WO2019145097 A1 WO 2019145097A1 EP 2018085762 W EP2018085762 W EP 2018085762W WO 2019145097 A1 WO2019145097 A1 WO 2019145097A1
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- WIPO (PCT)
- Prior art keywords
- rail
- pressure
- rotary press
- curve
- pressure roller
- Prior art date
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Classifications
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- 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
- B30B11/005—Control arrangements
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- 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
- 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
- B30B11/085—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 for multi-layer articles
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- 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
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- 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
Definitions
- the invention relates to a rotary press for producing single-layer or multi-layer tablets comprising at least one filling device for filling a press material in openings of a die plate, at least one filling station, at least one dosing station for the lower dies, at least one printing station and at least one Ejection station with tablet scraper and tablet chute, the at least one printing station each comprising an upper and a lower pressure roller and a respective upper and a lower curve sequence, the Kurvenab- runs with upper and lower stamping cooperate.
- the invention relates to the use of the rotary press.
- Rotary presses generally have a rotor with a circular base area, which has an upper and a lower punch guide, and a mattress disk arranged therebetween.
- This die plate has openings or die bores into which the material to be pressed is filled in a filling station by means of a filling device. By means of a dosing station, the material filled in the die bores is metered. Dosing in the sense of this invention means that excess pressing material is pushed back into the filling device by lifting the lower punches.
- the upper and lower punches are moved axially on the rotor circumference by means of stationary control curves, which are located above and below the rotor and are fastened to the respective stationary cam carriers.
- head-guided or roller-guided punch shafts are used.
- the upper punch guide of the rotor is formed by axial bores in the upper part of the rotor for the upper punch shanks.
- the lower punch guide by axial Holes formed in the lower part of the rotor for the Unterstempel2020fte. These axial bores are arranged in alignment with the die bores of the die plate, so that the upper punches and the lower punches can move within the die bore during the filling and pressing process.
- the pressing of the compacts takes place in a pressing station of the rotary press.
- a pair of upper and lower punch are successively pulled by two pressure rollers, which are arranged one above the other in a Druckrollenstation.
- Such a pressure roller station is described, for example, in DE 197 05 092 C1.
- a pressing station is firmly anchored on the support plate of a rotary press and has an upper and a lower pressure roller, wherein the pressure rollers are mounted by means of bearing blocks on the guide column of the pressing station and arranged to be adjustable to each other.
- the formation of a compact is based on a compaction process in which the pressing tools move towards one another within the die bore, whereby any air present between the pressing surfaces of the stamps, which is located between the powder particles, is pushed out.
- the densification results in a substantially complete removal of air-filled interstices between the powder particles. Due to the absence of these intermediate spaces, the pressing particles get in contact with each other, which results in a toothing and connection of the particles with one another due to the transfer of the pressing force to the pressing particles. It is obtained a compact having a defined hardness. If only one pressing station is available in a rotary press, this is called the main press station.
- the corresponding compaction process is referred to as main compaction.
- a disadvantage of these rotary presses with only one pressing station described in the prior art is that in the presence of only one main pressing station often a poor venting of the press material is achieved. This effect applies both to powdery pressed material for pharmaceutical compacts and to particularly voluminous pressed materials or to those pressed materials which have a high powdery fine content. Inadequate venting will result in incomplete compaction and compacts with uneven or insufficient hardness. In addition, such compacts tend to crack and cover.
- the inadequate venting can be counteracted by equipping the rotary press with a second pressing station.
- This second pressing station is referred to as a pre-printing station and serves primarily to remove the air trapped in the press material prior to the main compression in advance from the press material. This makes it possible to use the pressure holding time when passing through the main pressure rollers no longer also for the venting of the press material, but almost exclusively for the final compression. The pressure holding time is thus substantially completely available for the action of the pressing force on the pressing material for the production and compression of the compact. In this way it is possible to obtain hard tablets even at the highest rotor speeds and demanding press materials.
- pre-press stations with an upper and a lower pre-pressure roller
- pre-press stations consisting of an upper and a lower pre-press rail.
- These formwork rails are located on the left in front of the upper and lower pressure rollers.
- left and right refer to the spatial directions that result when the curve is viewed from the outside, as it presents itself to an outside observer of a rotary press.
- the curve assignment depends on the direction of rotation of the rotor of a rotary press. By way of example, a rotary press is described in this application, the rotor runs counterclockwise, that is, left around.
- pull-down cams are those components of a camming sequence along which the top punches move downward during the pressing operation, while the elevator cam controls the upward movement of the top punches after the pressing operation.
- the upper punch down pull curve to the left of the upper pressure roller and the upper punch lift curve to the right of the upper pressure roller are fastened individually fixedly to the cam carrier of the upper curve run.
- the shanks of the upper punch are taken from the Niederyak curve and pulled down, towards the lower dead center of the upper pressure roller.
- the curve itself has a stroke of about 25 mm up to the upper edge of the die.
- the active dipping of the upper punches into the matrix is effected by the set immersion depth of the upper pressure roller. Since the immersion depth of the upper punches can usually vary between 2 and 10 mm, the heads of the upper punches run at different heights against the upper pressure roller. As the depth of insertion of the upper punches increases, this causes the starting angle to become less favorable, as a result of which the wear on the tool and on the upper pressure roller as well as the noise level and the vibrations in the rotary press increase.
- an adjustment path can be realized by using a punch-down and lift curve and in coordination with the adjustment possibility of the upper pressure roller.
- a disadvantage of the rotary presses described in the prior art is that no technically satisfactory solutions for immersion depths of the upper punches are described above 10 mm.
- a first molding material is first filled into the bores of the die plate by means of a filling device within a filling station.
- the lower punches of the rotary press by means of a stationary tightened filling curve down to a defined depth.
- a space closed in three spatial directions for filling the press material is created.
- the underside of this closed space forms the pressing surface of the lower punch.
- the pressing material can be filled in by means of the filling device located above the die plate.
- the depth of the press room can be controlled by using different fill curves that are interchangeable.
- the lower punches move flush with the upper edge of the die on the matrix subcircle into the filling chamber of the filling device filled with pressing material and are pulled steadily downwards through the filling curve until a predefined maximum filling position is reached. Since pressing material is present on the die plate during the entire downward movement of the lower punch, the pressing material is sucked into the die hole during the downward movement of the lower punch, whereby a uniform, homogeneous filling of the die bore is achieved.
- a pressing space is advantageously formed by the walls of the die bore and the top of the lower punch. To the top of this pressing space is open, being filled through this opening as described the material to be pressed.
- the length of the filling curve corresponds approximately to half the length of the filling opening of the filling device.
- Conventional concentric presses operate on the principle of excess metering, ie with the filling curve, more pressing material is filled into the die than is needed for the finished tablet.
- the average expert speaks of a gross filling.
- the filling of the press material takes place at least to the middle of the filling device.
- the filling curve is now followed by the dosing unit for the lower punches.
- the lower punch can be manually or automatically raised to the lowest Golfposi tion by 0 to 10 mm, whereby a net filling is achieved.
- the excess pressing material is pushed back into the right side of the filling device and can continue to be used.
- the upper and lower punches are fed to a pressing station.
- the upper punches which are controlled by the upper punch pull-down curve, dip into the die bore and move the pressing material of the first powder layer downwards in the direction of the lower punch.
- the immersion depth of the upper punches is also influenced by the setting of the position of the upper pressure roller. At the deepest point of immersion of the topmost pel, a free space is created above the first press material layer, which corresponds to the volume of the gross filling of the second or next layer. The corresponding curves and rails are also lowered until the lower pressure roller is reached.
- the upper and lower pressure rollers are in a very special position to each other in the pressing station. Due to the position of the upper pressure roller, the upper punches dive into the die in such a way that, after the upper punch lift in the die, a free space remains above the first layer, which corresponds to the gross volume of the second layer. Due to the position of the lower pressure roller, the lower punches are positioned in such a way that, in conjunction with the immersion depth of the upper punches, the first layer of the pressed material is lightly pressed.
- the upper stamps are raised by the elevator curve via the second filling device.
- the dies are passed to the second filling and dosing station after being pressed by rails which are located at the height of the top dead center of the lower pressure roller.
- the second filling device the second press material is filled into the die cavity.
- the second filling device does not work with a filling curve, as it has the first filling station together. Rather, the gross filling depth for the second filling is produced by means of the immersion depth of the upper punch in the pressing station.
- the individual curves are made in one piece from one piece.
- three pull-down curves and three lift curves are required. If, however, pressing tools are guided with an inner and outer roller, then it is not possible to manufacture these guide curves from one piece. Rather, the curves consist of three parts: an inner curve, an upper curve and an outer curve, which are fastened together as a package on the upper cam carrier.
- one set of curves consists of, for example, three pull-down curves and three lift curve segments. For three different depths of immersion, 18 curve segments are required per pressing station. This is associated with high investment for the user since these curves are made of hardened steel.
- a rotary press for the production of single or multi-layer tablets comprising at least one filling device for filling a press material in openings of a die plate, at least one filling station, at least one dosing station for the lower punch, at least one printing station and at least one ejection Station with tablet scraper and tablet chute, wherein the at least one printing station each comprises an upper and a lower pressure roller and a respective upper and a lower curve run, the curve sequences interacting with upper and lower punches.
- the rotary press according to the invention is characterized in that below the upper pressure roller at least one upper height-adjustable combination curve comprising a pull-down curve, an upper form rail, a safety rail and an elevator curve is arranged and the lower curve run a height-adjustable lower form rail and comprises a one-piece discharge curve, which are mounted below the lower pressure roller.
- the catching curve is preferably also referred to as a safety rail.
- form rail and form pressure curve are preferably used synonymously in the sense of the invention.
- the at least one pre-press station it is preferred in the at least one pre-press station to use an upper and a lower pre-pressure roller by means of an upper and a lower pre-pressure roller. to replace pressure rail.
- These formwork rails are located on the left in front of the upper and lower pressure rollers.
- the term "curve sequence" refers to a sequence of different curve segments and rails, which together form a substantially closed circle. The curve sequence serves to guide the roller or head-guided pressing tools. It is preferred that the cam segments are fastened to the cam carriers with screws.
- curves generally have a non-linear course and are rigid.
- rails have a substantially linear course and represent movable components of the rotary press.
- the term "printing station” preferably includes both main printing stations, as well as pre-printing stations and printing stations.
- the pressing process of a compact takes place in a main printing station, wherein in connection with this main pressing process, the pressing forces for the production of the compact from the main pressure rollers are transferred by means of the pressing tools to the powder material to be compacted.
- a venting of the press material takes place in a prepress station.
- the entire pressing time is available for the compression of the pressing material.
- An press station is preferably used in the production of multi-layer or Mantelkerntabletten to easily, for example, a first powder material, which is preferably already in the die opening, and thereby advantageously prepare for receiving, for example, a Pressling- core or another filling layer.
- FIG 1 the position of an upper pressure roller is indicated in the center, with the form rail according to the invention is located to the left thereof.
- the pull-down curve which guides the roller-guided upper punches in the direction of the die plate.
- FIG. 1 shows an upper curve sequence, as it is present, for example, integrated in a rotary press according to the invention. It is preferred that the pressure rollers are arranged above the curve sequence.
- the upper pressure roller points in Direction of an upper housing cover of the rotary press, while the curve expiry of a support plate, on which the rotor is facing, facing.
- a movement in the direction of this support plate is referred to in the sense of this invention as a movement "downwards”
- a movement in the direction of the upper housing cover in the sense of this invention represents a movement "upwards”.
- the upper and lower pre-pressure rails advantageously have long straight running areas for the shaft rollers or the shaft heads of the pressing tools, that is to say the upper and lower press punches. This results in a much longer than the prior art Druckverweilzeit the pre-pressing in the rail.
- larger pre-compression forces can be transmitted wear-free over a relatively long distance without friction.
- the extended Druckverweilzeit the Vorpresskraft leads to improved material venting of the press material.
- shanks of the press tools can optionally be equipped with an inner and an outer shaft roller.
- two shaft rollers act on an inner and an outer pre-pressure rail, whereby advantageously a pre-pressing force increased in comparison with the use of pre-pressure rollers and an extended pressure-retaining time can be realized.
- the Vordruckschienen invention represent a space-saving alternative to the transmission of a pre-pressing force compared to Vordruckrollen. It is preferred that a pre-press station on the pitch circle of the course of the curve occupies the same space as the main press station. This applies in particular if advantageously the main pressure rollers and the prepressure rollers have the same roller diameters. It was completely surprising that the pre-printed rails according to the invention require only 20% of the space required by a printing station, so that the remaining space for longer and softer cams can be used to control the pressing tools and for longer filling devices. The use of longer and flatter cams advantageously ensures a quiet, low-wear operation of the rotary press.
- the upper pre-pressure rail can be adjusted synchronously with the position of the pressure rollers.
- this synchronous height adjustment and the distance of the form rail to the bottom dead center of the upper pressure roller can be precisely adjusted. This reliably prevents uncontrolled dipping of the upper punches into the die bores. It was completely surprising that this advantage according to the invention can be realized independently of the set upper punch immersion depth.
- the upper dies can plunge uncontrollably into the die bores to a depth of several millimeters, since a rigidly formed catch rail mounted in the lower region of the upper cam carrier can only catch the upper punches ,
- the distance between the form rail and the pressure roller 0.5 mm and the pressure roller is set to a Oberstempeleinauchianae of 3 mm, the upper punch in the absence of press material, for example, at most 3.3 mm instead of the usual several millimeters For example, in the range of 6 to 8 mm, immerse in the die.
- the height adjustment of the upper combined curve including a pull-down curve and an elevator curve is done manually or automatically. Due to the flexible design of the height adjustment, the rotary press according to the invention is individually adaptable to the needs of the user. It is also preferable that the upper combination rail is firmly connected to the upper curve carrier after an adjustment.
- the ejection curve is preferably used for ejecting the produced compacts. It is preferred that after completion of the manufacture of the tablet, the tool couple leave the pressing station. Preferably, the upper punch is then first lifted by the elevator curve. During the upward movement of the upper punch, the lower punch preferably reaches the ejection rail, as a result of which the lower punch is advantageously raised in a time-delayed manner parallel to the upper punch. It is preferred that the lower punch by its upward movement pushes the finished pressed tablet from the pressing position in the die bore up to the upper edge of the dies, or the die plate.
- the upper punch preferably has a minimum distance to the upper edge of the tablet at all times. This effectively prevents contact between the tablet produced and the upper punch, which could, for example, lead to damage or destruction of the tablet by bursting.
- the invention relates to a rotary press in which a closed, infinitely vertically adjustable safety rail is arranged between the pull-down curve and the lift curve in the region of the upper pressure roller.
- a closed, infinitely vertically adjustable safety rail is arranged between the pull-down curve and the lift curve in the region of the upper pressure roller.
- the undesired immersion of the upper punches into the die is only detrimental if either no lower punches are present in the lower rotor part or, in the presence of the lower punches in the die bores, the dies are filled with pressing material.
- the first case a collision of the upper and lower punches is avoided by the fact that the lower punches are not present in the die bore.
- the upper punches set to be pressed Material on without touching the pressing surfaces of the lower punches. The existing pressing material thus protects the pressing surfaces of the lower and upper punches against damage.
- Damage to the upper or lower punches can occur, however, if the lower punches are located inside the die bore and the rotary press is started by a motor without any pressing material being present in the die bores. If the punches dive freely into the die holes at a high speed of up to 10 mm, they impact on the pressing surfaces of the lower dies with great force, damaging the lower and upper punch pressing surfaces by engraving or breaking notches in the upper and / or lower punches and become useless. A new acquisition of pressing tools involves considerable financial expenditures and long delivery times. In addition, the damaged tools must be recognized and replaced, which leads to downtime of the rotary press and to an increased personnel expenses.
- the upper combination rail consisting of a low-pull curve, pre-pressure rail, safety rail and an elevator curve
- the curve can be moved upwards or downwards. This is preferably done as a function of the set position of the upper pressure roller.
- the combi-curve has a feather guide on its rear side, while the two clamping screws have a slot in the Combination cam in the threaded holes in the cam carrier intervene.
- the combination cam is advantageously axially adjustable in height but not radially movable.
- the fastening configured as a clamp is preferably designed to be comparable.
- the adjustment of the lower form rail is advantageously easy to perform for the operator of the rotary press, as a special handwheel is provided for this purpose.
- the lower punches reach the pre-printing rail from different height positions as a function of the set metering position. This represents a technical challenge, which is overcome with the present invention, in that the upper punches always hit the movable transfer rails for the combined curve from a same position.
- the lower shanks are fed to the pre-printing rail and forwarded to the lower pressure roller, from there to the next filling station or to the ejection station.
- the invention relates to a rotary press, in which the upper pre-pressure rail is 0.3 to 1, 0 mm arranged offset from the upper pressure roller. It is preferred that the pre-pressure rail is located behind the bottom dead center of the upper pressure roller.
- the invention relates to rotary presses with movable transfer rails, which are arranged on the right and left of the combined cam and in each case have a swivel joint in transition regions to the combined cam.
- the movable transfer rails are part of the upper cam carrier.
- the movable design of the transfer rails allows a long adjustment of the upper punch from 0 to 25 mm.
- the swivel joints are thus in each case between the movable transfer rails and the upper combined cam, in other words the upper combined cam is arranged between the two movable transfer rails and is connected to these on the outer sides of the combined cam each by means of the rotary joints.
- a hinge allows rotational movement of the elements connected to the hinge in a spatial plane.
- This spatial plane is perpendicular to an imaginary axis through the center of the pivot, which is referred to as "rotation axis" or “axis of rotation” within the meaning of this invention.
- the axis of rotation of the rotary joints according to the invention advantageously coincides with an imaginary connecting line between the center of the circular curve progression and the rotary joint.
- the movable transfer rails each have a ball joint for compensating for changes in angle and length at the transfer rails which become rigid in a transition region. It is preferred that connect to the movable transfer rails on the side facing away from the upper Kombikurve sides rigid transfer rails.
- the rigid transfer rails and the movable transfer rails are advantageously connected to one ball joint each, which enables angular and length compensation, so that the movable transfer rails do not jam when the immersion depth of the upper punches is increased.
- a rotary press can be provided, realized in the immersion depths of the upper punch, in particular in a range between 10 to 25 mm can be.
- the concentric presses according to the invention are able to press, for example, press materials with a high compression ratio of 3: 1 to 5: 1, which are used, for example, in the production of multilayer tablets.
- Special press materials, such as poly waxes, require large filling depths and correspondingly large punch indentation depths.
- an upper curve run can be provided by the movable design of the transfer rails in conjunction with the use of ball and swivel joints in the transitional areas to the rigid transfer rails and the upper combined cam, so that a topstem diving range of 0 can be covered up to 25 mm.
- the use of movable transfer rails is particularly advantageous because it eliminates the use of different pairs of curves. This can save on acquisition costs for additional rails and curves, as well as expenses for the storage of rails and in the field of logistics.
- the assembly of different curves and rails is avoided, which reduces the personnel expenses when operating the rotary press according to the invention.
- the control effort required to determine whether the correct curves are used in combination with the press material to be pressed is also eliminated.
- the adjustable pre-pressure rail preferably represents an integrated part of the pull-down and elevator rail and is located below the upper pressure roller in the upper curve sequence.
- the attachment of the adjustable pre-pressure rail to the upper cam carrier is preferably realized by means of two screws, wherein the attachment is designed to be displaceable. The displacement is preferably possible in that the fastening bores of the fastening screws are designed as slots. It is preferred that for adjustment of the upper grain the fixing screws are loosened. After loosening the fixing screws, an adjusting screw can be turned to the right or to the left, whereby a height adjustment of the combination rail is achieved upwards or downwards according to the position of the upper pressure roller. After the combination rail has been adjusted, tighten the two fixing screws that secure the upper combination rail to the cam carrier.
- the upper combination rail after the height adjustment is again firmly connected to the upper cam carrier. Due to the interaction of the fastening screws with the oblong holes, the height adjustment of the pre-pressure rail is advantageously ensured.
- the height-adjustable design of the combination rail enables a rotary press to be provided which covers a complete adjustment range of the upper punches from 0 to 25 mm immersion depth. It is further preferred that the upper combination rail on its rear side has a long feather key which permits axial movement in a corresponding groove in the cam carrier but prevents radial movement.
- the term "rear side” in the sense of this invention designates the side of the upper combined curve facing away from the outside observer of the upper curve sequence, that is to say the rear side of the combination curve according to the invention faces the imaginary center point of the circular curve progression.
- the invention relates to a rotary press, in which the lower pre-pressure rail is arranged on a rocker.
- a rocker is a rotatable rail which has its fulcrum for an outside observer of the left-hand cornering.
- On the right side of the rocker it is supported with its underside on the load cell, which preferably measures and displays the pre-compression forces.
- the lower pre-pressure rail is fastened by means of fastening means on the preferably stable executed rocker.
- fastening means on the preferably stable executed rocker.
- fastening screws as fastening means.
- the rocker by means of further fastening means, such as bolts, rotatably attached to a plate.
- This plate has on its rear side, that is, the side facing away from the outside observer of the lower curve sequence side, a long key, which engages in a corresponding groove in the lower cam carrier.
- an axial movement of the plate is made possible by this feather key guide; However, a radial movement of the plate is prevented by this type of attachment.
- the fastening according to the invention of the lower pre-pressure rail by means of a rocker on a plate ensures the parallel height adjustability of the plate and the lower pre-pressure rail.
- This type of vertical displacement for the lower formwork rail is particularly simple and less prone to error for the user of the rotary press according to the invention.
- This is of particular advantage because the lower pre-pressure rail must be adjusted more frequently than the upper pre-pressure rail, for example, depending on the desired thickness of the compact to be set.
- the invention relates to a rotary press in which a movable lower transfer rail is arranged in the lower cam track between a metering curve and the lower pre-pressure curve, wherein the movable lower transfer rail on the right side by means of a rotary joint with the lower Forming rail is connected and the movable transfer rail on the left side is connected by means of a ball joint with the dosing curve.
- the height-adjustable lower pre-pressure rail changes its position relative to the dosing curve for each height adjustment made.
- the inventive arrangement of the movable lower transfer rail between the metering and the lower form curve advantageously a smooth and continuous transfer of the lower shanks of the lower punch is provided by the metering curve to the lower form pressure curve.
- the movable lower transfer rail is pivotally and displaceably mounted, which is achieved by the connection of the movable lower transfer rail by means of a rotary joint on the right side of the movable transfer rail to the lower form rail.
- the movable transfer rail is connected to the metering curve by means of a ball joint.
- the swivel joint advantageously constitutes a fixed pivot point of the movable transfer rail, while the ball bearing on the left-hand side permits a rotating and pushing movement of the movable transfer rail.
- a double-sided ejection rail is provided to the right of the lower pressure roller of the pre-printing station and the adjustable lower pre-printing rail, which serves for measuring the ejection force by means of a measuring cell.
- the ball bearing allows the movable lower crossbar a compensation of height and length changes that occur at a height adjustment of the lower form rail.
- the invention relates to a rotary press, in which the lower pre-pressure rail is height-adjustable automatically or manually via a handwheel. It is preferred that the adjustment of the relative position of the lower form rail relative to the lower pressure roller is measured with a spindle and displayed with a clock.
- the plate connected to the lower pre-pressure rail can be clamped to the lower cam carrier after adjustment of the lower pre-print rail by means of fastening means, for example a screw.
- the adjustability of the lower pressure rail allows optimum adaptation of the rotary press according to the invention to different operating requirements, which are determined by different compact geometries, for example the desired thickness of a compact.
- the invention relates to a rotary press, in which the lower pre-pressure rail is arranged offset by 0.3 to 1.0 mm from the lower pressure roller. Due to the recessed arrangement of the lower pre-pressure rail relative to the top dead center of the lower A pressure roll of 0.3 to 1.0 mm is advantageously achieved so that the pre-compression force applied within the pre-printing station is less than the main compressive force applied within the main printing station. This is necessary because the upper and lower pre-pressure rails and their mounts are not designed to accommodate high compressive forces such as occur within a main pressure station. An incorrect arrangement of the upper or lower pre-pressure rails relative to the upper or lower pressure rollers leads to an immediate stop of the drive of the rotary press according to the invention
- the invention relates to a rotary press, in which the lower pre-pressure rail by means of fastening means manually and / or automatically attached to the lower curve sequence and / or present clamped attached.
- the fastening means may preferably be fixing screws with which the lower pre-pressure rail is fastened to the rocker.
- the attachment of the lower pre-pressure rail allows the height adjustment of the pre-printing rail relative to the lower pressure roller, which ensures easy operability of the rotary press according to the invention.
- the invention relates to the use of the rotary press according to the invention, wherein a distance of the upper form rail to the upper pressure roller is measured and displayed by a clock.
- the clock for measuring and displaying the distance between the upper pre-pressure rail and the upper pressure roller is preferably arranged above the upper pre-pressure rail by means of a holder and is connected to the upper pre-pressure unit by means of fastening means, for example a screw.
- the clock determines the actual distance of the upper form rail to the upper pressure roller at all operating times and displays this. Preferably, this makes it possible to detect the actual operating parameters of the rotary press according to the invention.
- the invention relates to the use of a rotary press, in which a measurement and an indication of the distance between the upper form rail and the upper pressure roller mechanically and / or electronically, wherein the measurement result is displayed in a touch panel.
- a touch panel is a touch screen or touch screen, the terms used interchangeably in the context of the present application.
- a touch panel is a combined input and output device in which the program run of the rotary press can be controlled directly by touching parts of an image on a screen as part of the touch panel. It is preferred that the touch panel is a device that reacts in particular to resistive and capacitive inputs.
- This alternative embodiment of the invention corresponds to the modern requirements for the simple operability of a rotary press, wherein advantageously the results of a distance measurement, which can take place manually or electronically, are displayed in a touch panel.
- the display of the measurement results in a touch panel is particularly advantageous since the user of the rotary press can react to the displayed results without any loss of time and can enter them directly via the touch panel.
- the invention relates to the use of a rotary press, in which a zero position between the upper pressure rail and the upper pressure roller a zero position between the lower form rail and the lower pressure roller is mechanically and / or electronically monitored ,
- the zero position is the position in which the lower pre-pressure rail and the top dead center of the lower pressure roller are at a height.
- the zero position for the upper curve sequence is determined by the height equality of the upper form rail with the bottom dead center of the upper pressure roller. It is necessary that the pre-pressure rails are always arranged offset from the dead points of the pressure rollers, preferably by an amount of 0.3 to 1 mm, so that the pre-pressing force is always smaller than the main pressing force. Otherwise, damage would be caused to the pre-pressure rails and their brackets, as these are not designed for the high pressing forces that occur at the main pressure in the main press station.
- the invention relates to a use of the rotary press, in which the rotary press is automatically stopped when the upper form rail is disposed below the upper pressure roller and / or the lower form rail above the lower pressure roller is arranged angeord- net. It is preferred that this stop mechanism is realized by limit switches, which are provided at the upper and lower adjustment of the pre-pressure rails. It is preferred that these limit switches stop the rotary press when a zero position is reached.
- the invention relates to the use of a rotary press, in which a pre-pressing force is also measured on the upper pre-pressure rail by means of a measuring cell and the measured pre-pressing force is displayed in the touch panel. It is preferred that the pre-compression force arising during the pressing process between the upper and the lower pre-pressure rail is measured with a measuring cell and displayed in a touch panel.
- the measuring cell is preferably mounted on the plate of the lower pre-printing unit, which is connected to a rocker and the lower pre-pressure rail. It is preferable for the measuring cell to protrude through the rocker.
- the lower pre-pressure rail is attached with fastening means, for example two fastening screws. It is preferred that the lower side of the lower pre-pressure rail has mechanical contact with the upper side of the measuring cell.
- the rotary press comprises a measuring cell with which the pre-compression forces occurring between the upper and lower pre-printing rail during the pressing process can be measured and displayed in the touch panel.
- the measuring cell is arranged on the plate and / or fixed and protrudes through the rocker.
- the lower pre-pressure rail is fastened on the rocker in the region of the measuring cell with preferably two screws, in particular screwed tightly, one lower side of the lower pre-pressure rail having mechanical contact with the measuring cell.
- the force is preferably transmitted to the rocker, where the rocker under load slightly above the fulcrum may preferentially dodge down.
- the downward movement of the rocker preferably presses the lower pre-pressure rail onto an end face of the measuring cell, whereby advantageously a force signal is generated, which can be displayed, for example, on the touch panel.
- the rotary press is set up to ensure position monitoring of the lower pre-print rail.
- the rotary press preferably comprises an ascending lower pre-pressure rail, which is preferably present just below the upper pre-pressure rail and preferably acts on the rollers of the lower press-punches. Due to this advantageous arrangement of the rising lower pressure rail, a desired pre-pressure force is exerted on the pressing material, which is preferably located in the bores of the matrices between the surfaces of the upper and lower punches.
- a monitoring of the (zero) position of the lower pre-pressure rail can preferably by a drag lever and a Limit switch made.
- An attachment of the plate to the lower cam carrier can be achieved, for example, with a fastener, such as a screw.
- Fig. 1 shows a preferred embodiment of an upper curve sequence of a rotary press
- FIG. 2 shows a detail of a preferred embodiment of an upper curve expiry of a rotary press (rear view)
- Fig. 3 shows a preferred embodiment of a lower cam carrier with curve sequence of a rotary press
- Fig. 1 shows a preferred embodiment of an upper cam sequence (17) of a rotary press.
- an upper pressure roller (3) is indicated in FIG. This interacts with the press dies and produces the tablet in the die bores of the dies.
- Shown in Fig. 1 is in particular the upper form pressure unit (1), preferably from the inner form rail (1.1), the outer form rail (1.2) and the safety rail (1.3), wherein the upper form pressure unit (1) in the context of the invention synonymous is called a combined curve.
- the inner pre-pressure rail (1.1.) And the outer pre-pressure rail (1.2) are preferably designed to be adjustable. For the purposes of the invention, it is preferable for the fastening screws (2.1 and 2.2) to be released first.
- the position and / or height of the upper pre-pressure rail (1) according to the position and / or position of the upper pressure rollers (3) can be adjusted, advantageously monitoring the zero position of the upper pressure roller (3 ) with respect to the formwork rail (1) by a sensor (8). It is further preferred that the actual distance between the upper pressure roller (3) and the pre-printing rail (1) takes place by means of a clock (7), in particular a dial gauge, which is also shown in FIG. Next, a holder (4) for the dial gauge is shown, and a fastening screw (5) for this holder. After adjustment of the pre-pressure rail (1) against the pressure roller (3), the two screws (2.1 and 2.2) can be tightened again.
- the cam carrier (17) comprises on its inside feather keys (18) which advantageously allow a groove in the cam carrier (17) an axial movement of the pre-pressure rails (1.1 and 1.2) and a radial movement of the pre-pressure rails ( 1.1 and 1.2) advantageously prevent.
- the safety rail (1.3) is arranged between the pre-pressure rails (1.1 and 1.2); Within the meaning of the invention, it is preferably also referred to as a safety rail or integrated safety rail. It is advantageously arranged below the bottom dead center of one of the upper pressure rollers (3) and thus advantageously replaces a gap in the curved path that exists in conventional tablet presses between the pull-down and the lift curve. The gap makes it possible for the upper punches to dip into the matrix over a larger area of the curved path in order to transfer the pressing pressure to the tablet material to be compressed.
- the integrated safety rail (1.3) Since the adjustable pre-printing rail (1.1 and 1.2) is preferably 0.3 to 1.0 mm behind the printing roll (3), the upper stamp can also be moved into the area beyond the printing roll (3) by only this amount Immerse the die, completely eliminating any contact with the die surfaces.
- the outer form rail (1.2) in the context of the invention also act as a pull-down curve and is synonymously also referred to as such.
- the inner pre-pressure rail (1.1) is arranged below an upper pressure roller (3) and can be fastened to the cam carrier (17) with two screws (2.1 and 2.2), which are preferably designed as clamping screws. It is preferred in the sense of the invention that the fastening bores for the screws (2.1 and 2.2) are designed as elongated holes (2a and 2b), so that Advantageously, a displaceability of the inner pre-pressure rail (1.1) is made possible.
- a transfer cam (not shown) may be used to receive the upper shanks of the dies, while dies of the die plate are filled by a filling device.
- the transition curve may preferably be arranged in an angulated manner between the movable rails (10 and 15), so that the transfer curves are preferably arranged in each case between one of the preferably three pressure rollers (3) within the upper curve outlet (17).
- the transfer rail may include a sensor (not shown) configured to monitor the stiffness of the upper punches and the upper punch removal opening. It is preferred that when the rotor rotates counterclockwise, the upper shanks of the ram are fed via preferably movable rails (10) of the upper form rail (1).
- the inner shaft rollers after the joint (9), which is preferably designed as a swivel joint, to the Niederzugkurve the formwork rail (1) are passed, where they are preferably pulled down.
- the shafts are preferably transferred to the inner pre-printing rail (1.1) and the outer pre-printing rail (1.2), whereupon the shanks are lowered further until a straight-line area of the pre-printing rails (1.1 and 1.2) is reached.
- the upper form pressure unit (1) and the pre-pressure rails (1.1 and 1.2) with respect to the pressure rollers (3) are designed to be height adjustable. This height adjustment can advantageously be done manually or automatically. It is a particular advantage of the invention that thereby independent of the Stel development and / or position of the upper pressure rollers (3) an optimal position of the pre-pressure rail (1, 1.1, 1.2) with respect to the bottom dead center of the pressure roller (3 ) can be adjusted.
- FIG. 1 further shows the preferably movable, that is to say adjustably designed, transfer rails (10 and 15) and the preferably rigid transfer rails (12), wherein the rigid transfer rails (12) are preferably arranged so that they advantageously pass over allow the upper shanks of the press punches on the filling of the tablet press.
- the transfer rail (10) synonymously as an intake rail
- the transfer rail (15) as a discharge rail.
- Fig. 1 shows that between the preferred rigid Matterleitschienen (12) and the pre-printing unit (1) preferably the movable transfer rails (10 and 15) for guiding the upper shafts arranged between the filling device and upper pressure roller (3) are present.
- the preferred movable embodiment of the transfer rails (10 and 15) represents a significant advantage over conventional tablet presses, as by the mobility of the transfer rails (10 and 15) a passing of the upper shafts of the preferably rigidly formed and fixed to the cam carrier Kochleitschienen ( 12) to the height-adjustable pre-pressure rails (1.1 and 1.2).
- this is ensured by the provision of joints (9 and 14) which according to FIG.
- a further advantage of the invention is that the shafts can be guided axially by means of rollers, wherein the particular unilateral height adjustability of the transfer rails (10 and 15) also jamming the inner guide rollers of the shafts within the cam carrier (17) or Its components are surprisingly effectively prevented.
- This is advantageously due to the fact that, unlike conventional head-guided press-stem shafts, there is no need for a large amount of headroom for the movement of the shafts, which in particular increases the risk of serious mechanical damage can be significantly reduced by jamming the shafts.
- the advantages mentioned here for the preferably movable transfer rails (10 and 15) also apply in each case to the transfer rails (10 and 15) which are preferably mounted between other pressure rollers (3) in the course of the curve.
- Fig. 1 shows a section of an upper cam carrier (17), which may comprise, for example, three pressure rollers (3).
- an upper cam carrier (17) which may comprise, for example, three pressure rollers (3).
- the invention is not limited to such cam carriers, but can be used in particular in single, double and triple presses, wherein the number of pressure rollers (3) may vary.
- FIG. 2 shows a detail of a preferred embodiment of an upper curve drain (17) of a rotary press.
- FIG. 2 is a detail view of a rear view of a preferred cam sequence (FIG. 17), i. an idea as it can be, for example, from the inside of the tablet press out.
- FIG. 3 shows a section of a preferred embodiment of a lower curve carrier (19) with a curve progression of a rotary press. Shown is schematically in particular the position of the lower pressure roller (23) within the curve sequence of the cam carrier (19).
- the preferred embodiment of the lower curve sequence (19) shown in FIG. 3 advantageously makes it possible to measure the precompression force and thus contributes significantly to quality management within the tablet manufacturing process.
- the lower prepressure station preferably comprises a lower pressure rail (24) which is preferably fastened with two screws on a preferably stable rocker arm (27), wherein the rocker arm (27) is preferably designed to be rotatable and by means of a bolt (27a) a plate (29) can be attached.
- the plate (29) comprises a feather key (44), which preferably engages in a corresponding groove in the cam carrier (19), whereby advantageously an axial keyway guide of the plate (29) allows, but a radial movement is effectively avoided.
- the plate (29) is supported on a wedge (30) which can move axially in two guide rails (42).
- a star grip (31) and a spindle (31a) allow advantageously example, an adjustability of the wedge to the right or left. It is preferred in the sense of the invention that the wedge (30) moves to the right when the star grip (31) is rotated to the right, the spindle (31a), which is preferably formed by an adjusting spindle, this Right movement follows.
- this adjusting movement leads to a preferably parallel lifting of the plate (29) and the lower pre-pressure rail (24).
- Analolg leads a left-hand rotation of the star grip (31) and the adjusting spindle preferably to a preferably parallel lowering the plate (29) and the lower form rail (24).
- This particularly convenient embodiment of the adjustability of the lower pre-print rail (24) is particularly advantageous because the lower pre-print rail (24) must be adjusted relatively frequently in practice, since with the height and / or position adjustment of the lower pre-print rail (24). 24), for example, the desired tablet thickness can be adjusted.
- the plate (29) with a screw (35), for example by clamping on the cam carrier (19) are attached.
- a zero position of the lower pressure rail (24) can be monitored with a finger follower (28) and a limit switch (36), wherein the zero point is defined in particular when the lower pre-pressure rail (). 24) and the top dead center of the lower pressure roller (23) are at a height with each other.
- the lower pre-pressure rail (24) it is particularly preferable for the lower pre-pressure rail (24) to be arranged, for example, 0.3 to 1.0 mm behind top dead center of the lower pressure roller (23), so that the pre-pressure is advantageously smaller than the main pressure .
- the upper zero point sensor (8) and the zero point limit switch (36) form a safety device within the tablet press, with which the tablet press is preferably instantly stopped when the upper (1) or lower (24) pre-press rail is misadjusted can.
- a further advantage of the preferred embodiment of the lower cam sequence (19) shown in FIG. 3 is that the height and / or position setting of the lower pre-pressure rail (24) is measured with a spindle (34) and with one Clock (32), preferably a dial gauge, can be displayed.
- the lower transfer rails (43) are designed to be movable, and in particular mounted pivotably and displaceably.
- the abovementioned advantages with regard to the preferably movably configured transfer rails (10 and 15) are preferably analogous. It is preferred for the purposes of the invention that the transfer rail (43) has a joint (25) in the transition region to the lower pre-pressure rail (24), which is advantageously designed as a rotary joint.
- the transfer rail (43) preferably has a joint (26), which is preferably designed as a ball (bearing) joint and advantageously permits a rotational and / or sliding movement.
- Safety rail safety rail
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/964,568 US20210031477A1 (en) | 2018-01-25 | 2018-12-19 | Adjustable initial pressure rail for rotary press having integrated measurement of the initial pressure force |
JP2020538096A JP7069323B2 (ja) | 2018-01-25 | 2018-12-19 | 予圧の一体型測定機能を有するロータリープレスの調整可能な予圧レール |
CN201880087639.4A CN111655468B (zh) | 2018-01-25 | 2018-12-19 | 具有初始压力的集成测量的用于旋转压力机的可调节的初始压力导轨 |
KR1020207023985A KR102401273B1 (ko) | 2018-01-25 | 2018-12-19 | 예비 가압력의 통합 측정을 갖는 회전 프레스용 조정 가능한 예비 압력 레일 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18153467.8 | 2018-01-25 | ||
EP18153467.8A EP3517289B1 (de) | 2018-01-25 | 2018-01-25 | Verstellbare vordruckschiene für rundlaufpresse mit integrierter messung der vordruckkraft |
Publications (1)
Publication Number | Publication Date |
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WO2019145097A1 true WO2019145097A1 (de) | 2019-08-01 |
Family
ID=61027574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2018/085762 WO2019145097A1 (de) | 2018-01-25 | 2018-12-19 | Verstellbare vordruckschiene für rundlaufpresse mit integrierter messung der vordruckkraft |
Country Status (7)
Country | Link |
---|---|
US (1) | US20210031477A1 (de) |
EP (1) | EP3517289B1 (de) |
JP (1) | JP7069323B2 (de) |
KR (1) | KR102401273B1 (de) |
CN (1) | CN111655468B (de) |
ES (1) | ES2863449T3 (de) |
WO (1) | WO2019145097A1 (de) |
Citations (8)
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US3063390A (en) * | 1960-07-27 | 1962-11-13 | Stokes F J Corp | Tablet machine with inspection means |
SU656872A1 (ru) * | 1975-04-02 | 1979-04-15 | Ждановский Завод Технологического Оборудования Медицинской Промышленности | Роторна таблеточна машина |
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JP2000301395A (ja) * | 1999-02-09 | 2000-10-31 | Japan Nuclear Fuel Co Ltd<Jnf> | 粉末成形機 |
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-
2018
- 2018-01-25 ES ES18153467T patent/ES2863449T3/es active Active
- 2018-01-25 EP EP18153467.8A patent/EP3517289B1/de active Active
- 2018-12-19 KR KR1020207023985A patent/KR102401273B1/ko active IP Right Grant
- 2018-12-19 WO PCT/EP2018/085762 patent/WO2019145097A1/de active Application Filing
- 2018-12-19 CN CN201880087639.4A patent/CN111655468B/zh active Active
- 2018-12-19 JP JP2020538096A patent/JP7069323B2/ja active Active
- 2018-12-19 US US16/964,568 patent/US20210031477A1/en active Pending
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US3063390A (en) * | 1960-07-27 | 1962-11-13 | Stokes F J Corp | Tablet machine with inspection means |
SU656872A1 (ru) * | 1975-04-02 | 1979-04-15 | Ждановский Завод Технологического Оборудования Медицинской Промышленности | Роторна таблеточна машина |
SU1013305A1 (ru) * | 1982-02-05 | 1983-04-23 | Ждановский Завод Технологического Оборудования Медицинской Промышленности | Механизм предварительного прессовани роторной таблеточной машины |
DE19705092C1 (de) | 1997-01-31 | 1998-03-26 | Korsch Pressen Gmbh | Druckrolleneinheit für Rundlaufpressen |
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JP2000301395A (ja) * | 1999-02-09 | 2000-10-31 | Japan Nuclear Fuel Co Ltd<Jnf> | 粉末成形機 |
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CN103707547B (zh) * | 2013-12-27 | 2016-08-17 | 朗利维(北京)科技有限公司 | 一种在线校准压片机压轮及填充机构位置的方法 |
Also Published As
Publication number | Publication date |
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JP2021511212A (ja) | 2021-05-06 |
EP3517289A1 (de) | 2019-07-31 |
CN111655468A (zh) | 2020-09-11 |
ES2863449T3 (es) | 2021-10-11 |
KR102401273B1 (ko) | 2022-05-24 |
US20210031477A1 (en) | 2021-02-04 |
EP3517289B1 (de) | 2020-12-30 |
KR20200108470A (ko) | 2020-09-18 |
CN111655468B (zh) | 2022-07-22 |
JP7069323B2 (ja) | 2022-05-17 |
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