EP3517288B1 - Rail d'accrochage pour une presse à table tournante - Google Patents

Rail d'accrochage pour une presse à table tournante Download PDF

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Publication number
EP3517288B1
EP3517288B1 EP18153460.3A EP18153460A EP3517288B1 EP 3517288 B1 EP3517288 B1 EP 3517288B1 EP 18153460 A EP18153460 A EP 18153460A EP 3517288 B1 EP3517288 B1 EP 3517288B1
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EP
European Patent Office
Prior art keywords
cam
pressure roller
rotary press
curve
station
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.)
Active
Application number
EP18153460.3A
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German (de)
English (en)
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EP3517288A1 (fr
Inventor
Michael Matthes
Wolfgang Korsch
Stephan Mies
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Korsch AG
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Korsch AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to ES18153460T priority Critical patent/ES2945984T3/es
Application filed by Korsch AG filed Critical Korsch AG
Priority to EP18153460.3A priority patent/EP3517288B1/fr
Priority to US16/964,768 priority patent/US11919268B2/en
Priority to KR1020207023987A priority patent/KR102547035B1/ko
Priority to CN201980010051.3A priority patent/CN111655469B/zh
Priority to PCT/EP2019/050289 priority patent/WO2019145138A1/fr
Priority to JP2020560548A priority patent/JP2021511968A/ja
Publication of EP3517288A1 publication Critical patent/EP3517288A1/fr
Application granted granted Critical
Publication of EP3517288B1 publication Critical patent/EP3517288B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0023—Drive arrangements for movable carriers, e.g. turntables
    • 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
    • B30B15/026—Mounting of dies, platens or press rams

Definitions

  • the invention relates to a rotary press comprising at least one press station, each with a height-adjustable upper and lower pressure roller, which are mounted in the at least one press station by means of axles, with cam-guided upper punches with punch heads being fed to the upper pressure roller by means of a control cam and a lifting cam moving the upper punches to a highest point point above a filling device.
  • the invention relates in particular to a height-adjustable catch curve which is designed to be height-adjustable in relation to the upper pressure roller.
  • the rotary press includes a pre-compression curve that is integrated in a guide block.
  • the invention is also suitable for the production of multi-layer or sheath-core compacts.
  • the rotary press comprises at least one main pressing station and, depending on the number of layers to be pressed, optionally further filling, dosing and/or pressing stations, and in the case of jacket core compacts via a core insertion station and, if necessary, pressing stations .
  • Rotary presses are used to produce large numbers of pharmaceutical tablets or chemical, technical or industrial compacts, in particular from raw materials in powder form.
  • Rotary presses usually have a rotor with a circular base, which has an upper and a lower punch guide, and a die plate arranged between them.
  • This die plate has openings or die bores into which the material to be pressed is filled in a filling station using a filling device. The material filled into the die bores is dosed to the desired weight by means of a dosing station.
  • the upper and lower punches are moved axially on the rotor circumference by means of stationary control cams, which are located above and below the rotor and are attached to the respective stationary cam carriers.
  • Head-guided or roller-guided punch shafts are used in rotary presses.
  • 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 lower punch shanks.
  • a rotary press according to the preamble of claim 1 with such a pressure roller station is for example in DE 197 05 092 C1 described.
  • a press station is firmly anchored in the carrier plate of a rotary press and has an upper and a lower pressure roller, the pressure rollers being attached to or in the guide column of the press station by means of bearing blocks and being arranged such that they can be adjusted in relation to one another.
  • the positioning of the pressure rollers relative to one another causes the upper and lower punches to move in opposite directions when passing the pair of pressure rollers, which exerts a pressing force on the material to be pressed between the punches inside the die.
  • a tablet or compact is produced from the powdered pressing material.
  • the formation of a compact is based on a compression process in which the pressing tools move towards one another within the die bore, with any air present between the powder particles being pressed out of the pressing material located between the pressing surfaces of the stamps.
  • the densification results in a substantially complete removal of air-filled spaces between the powder particles. Due to the absence of these gaps, the compacted particles come into contact with one another, as a result of which the particles are interlocked and connected to one another due to the transmission of the compressive force to the compacted particles.
  • a compact is obtained which has a predefined hardness. If there is only one pressing station on a rotary press, it is referred to as the main pressing station. The corresponding compression process is referred to as main compression.
  • the upper rams are located above the filling device in rotary presses. If the rotary press is equipped with a pressure station, after the filling and dosing process by the lower punches, the upper punches are guided downwards by the pull-down rail in the direction of the die discs until the upper punches dip into the die bores of the die disc. By immersing, the upper punches close the die openings and form the upper end of the pressing chamber during the compression process. The side walls of the die bore form the side walls of the pressing chamber for the compact to be obtained, while the pressing surface of the lower punch represents the underside of the pressing chamber.
  • the present invention relates in particular to the control cams of the at least one pressing station, which feed the upper punches to the upper pressure roller and, after the pressing process, raise them to their highest point above the filling device with the lifting cam.
  • the upper punches are located above the filling device during the filling and dosing process.
  • the upper punches at the end of the filling device are preferably lowered in the direction of the die plate by means of the pull-down cam to the left of the upper pressure roller.
  • the resilient cover rail preferably ends shortly before the upper punch enters the die bore. If the die were filled flush by this time, the die bore would be open at the top at the moment of release and material would be lost due to material being thrown out before the upper punch could close the upper die bore. In order to prevent this unwanted loss, it is preferred within the meaning of the invention that the Lower punch, as well as the flush-filled matrices below the resilient cover rail, are pulled off 2 to 3 mm downwards. Since the material column in the die bore rests on the lower punch, the material column follows the movement of the lower punch and the upper material column is located 2 to 3 mm below the top edge of the die at the end of the lower punch withdrawal movement.
  • the centrifugal force continues to act on the column of material, resulting in an outwardly rising embankment in the bore, which ends, for example, 1 to 1.5 mm below the upper edge of the die. This means that due to the lowering of the material column - despite the centrifugal force - the pressing material advantageously cannot leave the die through the remaining outer bore wall.
  • the material lowering of 2 to 3 mm also offers another advantage. If the upper punches at the end of the spring-loaded cover rail were to plunge into the flush-filled die at high speed, spontaneous deflagration and thus uncontrolled loss of material would occur. In addition, with the rapidly escaping air from the pressing material, a proportion of fine dust would escape upwards out of the die bore, which disadvantageously leads to losses and severe contamination of the rotary press. Due to the material lowering described above, the upper punches no longer dip into a flush-filled die, but preferably into an empty space, and the upper punches advantageously only come into contact with the pressing material after a plunge distance of 1 to 2 mm.
  • the die hole is closed by the upper punch and lower punch, and the air in the pressing material can advantageously escape during the pre- and main pressing process through the small air gap of 0.01 mm, for example, between the die hole and the upper and lower punch without significant loss of material occurs.
  • a pull-down curve is usually arranged to the left of the upper pressure roller, while the lift-up curve is arranged to the right of the upper pressure roller.
  • the pull-down cam is responsible for lowering the upper punches in the area of the die hole, while the lifting cam pulls the upper punches out of the die hole when the pressing process of the compact is complete.
  • the pull-down cam and the lift cam for the upper punch are two separate cam elements that are rigid and stationary on the upper cam carrier with a non-positive and positive fit. This creates a gap below the upper pressure roller between the pull-down curve and the lift curve in the upper curve run.
  • the plunge depth of the upper punch With conventional rotary presses, it is common for the plunge depth of the upper punch to be a maximum of 6 to 8 mm.
  • the pull-down curve for the upper punch with an immersion depth of 2 to 3 mm contributes to this maximum upper punch immersion depth, while the remaining immersion depth is made possible by the adjustable upper pressure roller.
  • the press punches can break, or the pressing surfaces of the pressing tools are left with imprints from engravings or unwanted breaking notches. Pressing tools damaged in this way are unusable for further use and must be replaced.
  • the rigid safety rails are usually fastened in a lower, inner area of the upper cam carrier. This makes a low filling depth from the second layer onwards more difficult when producing multi-layer compacts, since the upper punches, due to their own weight and the immersion speed, may compress the compacted material of the first layer too much and in an uncontrolled manner, so that depending on the sluggishness of the individual upper stamp, the weight of the second filling varies greatly due to the different height of the free space above the pressed first layer.
  • the surface of the upper side of the first compact layer can be so smooth and closed that the formation of a durable connection between the compacted material of the first layer and the compacted material of the second layer is made considerably more difficult.
  • These so-called over-pressed compacts tend to cover at the parting line between the first and second powder layer and usually have to be disposed of as rejects.
  • a rotary press for producing mantle core pellets corresponds to a three-layer rotary press in which the second filling device has been replaced by a core insertion module. After the first layer has been filled into the die bore, it has proven to be advantageous if this is lightly pressed on by the upper pressure roller in a first pressing station. This pressing on of the first layer of powder during the production of jacket core compacts is also referred to as "tamping" in the context of this application, which is why the terms "tamping station” and “pressing station” are used synonymously.
  • press force signals which is also referred to as "noise" in the context of this application, so that press force signals ranging from 5 to 50 Newtons are not recognized.
  • these press force signals are important in order to be able to assess the quality of the production process.
  • a reliable pressing force signal is required for automatic weight control and for sorting out faulty compacts. It can happen that a complete production batch is automatically discarded due to the faulty press force signals, which is undesirable.
  • a rotary press comprising at least one pressing station, each with a height-adjustable upper and lower pressure roller, which are mounted in the at least one pressing station by means of axles, with cam-guided upper punches with punch heads or rollers being fed to the upper pressure roller by means of a cam , and a winding curve, which the upper dies follow during the pressing process to a highest point above a filling device.
  • the rotary press equipped in this way is characterized in that in the at least one pressing station below the upper pressure roller there is a safety cam that is height-adjustable relative to this upper pressure roller.
  • a pressing station within the meaning of this invention is a pressing station with a height-adjustable upper and a height-adjustable lower pressure roller, between which upper and lower press rams are guided by means of control cams, with the control cams forming an upper and lower curve sequence and by bringing the press rams together in the area between the two Pressure rollers the powder material to be pressed is pressed into compacts in the die bores.
  • the upper punches are fed to the at least one pressing station by means of a control cam of the upper pressure roller and, after the pressing process, are raised to their highest point above the filling device with a lifting cam.
  • the pressing station according to the invention can advantageously be a main pressing station or a pre-pressing station.
  • a main pressing station of a rotary press the powder material to be pressed is pressed into compacts, in that the powder particles combine with one another as a result of the applied main pressing force.
  • a pre-compression, tamping or pre-compression station a powder material located in a compression chamber is lightly pressed on with a pre-compression, tamping or pre-compression force that is smaller than the main compression force.
  • a pre-compression, tamping or pre-compression station serves to deaerate the powder material to be compressed or, in the manufacture of multi-layer or shell-core tablets, to prepare the lower layer of powder to receive the tablet core or other layers of material.
  • the air located between the powder particles advantageously escapes from the pressing material by venting the pressing material.
  • the time available for pressing the compacts in the main pressing station is essentially exclusively available for the pressing process and no longer has to be used for venting as well. This improves the stability of the compacts obtained and thus increases the product quality.
  • the catch cam In the at least one pressing station of the rotary press, below the upper pressure roller, there is a catch cam that is height-adjustable relative to this upper pressure roller.
  • the catch curve is advantageously designed to be adjustable in height relative to the upper pressure roller, so that the distance between the catch curve and the upper pressure roller can be variably adjusted.
  • the height adjustability of the catch curve according to the invention enables the upper punch immersion depth and the contact pressure to be varied. It is preferred within the meaning of the invention that the height adjustment of the catch curve takes place synchronously, for example by coupling to the pressure roller bolt. It is particularly preferred that the height adjustment of the catch curve can preferably take place automatically with the adjustment of the upper pre-pressure roller.
  • the catch curve is designed as a closed curve.
  • the pressure force is transferred to the heads of the upper punches without the punch heads coming into contact with the upper pressure roller. Since the catch curve according to the invention is closed at the bottom, it advantageously also fulfills the function of a catch curve in the sense that it prevents the upper punches from entering the die bores in an uncontrolled manner and coming into mechanical contact with the lower punches. As a result, damage to the tool is advantageously ruled out.
  • the invention relates to a height-adjustable catch cam which, when the upper punch passes along a bottom dead center of the upper pressure roller, has a minimum distance of preferably 0.09 to 0.11 mm, particularly preferably 0.1 mm, from the punch heads of the upper punch having.
  • the catch curve according to the invention is in a pressing position at a distance of preferably 0.09 to 0.11 mm, particularly preferably 0.1 mm below the punch head of an upper punch when the punch heads of the upper punch pass the upper pressure roller.
  • the catch curve is further connected to the upper pressure roller axis at a defined distance.
  • the upper catch curve follows automatically an adjustment of the upper pressure roller.
  • the catch rail advantageously has a minimum safety distance of preferably 0.09 to 0.11 mm, particularly preferably 0.1 mm, from the bottom dead center of the upper pressure roller at all times.
  • This safety distance is advantageously increased by the height of the punch heads of the upper punches. This reliably prevents the upper punches from plunging into the die bores in an uncontrolled manner, which prevents damage to pressing tools caused by unwanted mechanical punch contacts. Furthermore, impermissibly large gross filling depths in the case of multilayer tablets, which lead to fluctuating tablet weights, are reliably prevented.
  • the invention relates to a catch cam which is connected to the axis of the upper pressure roller by means of a connecting piece.
  • the connection according to the invention between the catch curve and the upper pressure roller axis by means of a connecting piece has proven to be particularly advantageous for the production of very flat single-layer tablets, since the catch curve according to the invention is at a distance of only 0.09 to 0.11 mm below the upper punch immersion depth.
  • the catch curve is adjusted manually and/or automatically in relation to the pressure roller.
  • a manual and/or automatic implementation of the adjustability of the catch cam relative to the pressure roller advantageously ensures flexible use of the rotary presses according to the invention, it being possible in particular to respond to individual customer requests.
  • the invention relates to the connecting piece between the catch cam and the upper pressure roller axle, which has a bore that is attached to a collar bushing, the collar bushing being attached to the rear, rear end face of the axle of the upper pressure roller.
  • the connecting piece can be attached and/or guided axially and radially by means of recesses in the backs of a pull-down curve and a lift curve on an upper curve run.
  • a connecting piece is provided in the area of the upper curve run, which can be attached by means of recesses in the backs of the pull-down curves or the lift curves as components of the upper curve run.
  • the connecting piece is attached to the pull-down curve and the lift-up curve by means of detachable fastening means.
  • the connecting piece advantageously has a wide, rectangular lower area with rounded corners, which is used for attachment to the upper cam run of the rotary press, and a narrow, upper area in which a flanged bushing is mounted in a bore, the flanged bushing being the axis of an upper picks up the pressure roller.
  • the invention relates to a rotary press, in which the at least one pressing station is a pre-compression station with height-adjustable upper and lower pre-compression rollers, with a closed pre-compression curve being arranged in the upper curve sequence of the at least one pre-compression station, which is composed of several cam elements. It is preferred that the closed form curve also acts as a catch curve for the upper ram of the rotary press, in that the closed form curve effectively prevents the upper ram from plunging uncontrolled into the die bores of the die table due to its design and its positioning within the rotary press.
  • Shell-core compacts are compacts in which an insert is pressed inside a compact. Such an insert is also referred to as a "core". It is preferred if the information carrier is a chip or a film or if the core consists of a carrier material with an active substance that differs from the base material of the compact.
  • the rotary press used preferably corresponds to a three-layer rotary press in which a second filling device is replaced by a core insertion module.
  • This layer of powder is lightly pressed down in the pressing chamber of the die by an upper pre-pressure roller, resulting in an even, plane-parallel, closed surface of the powder material.
  • This light pressing of the surface ensures that when the core is later inserted, the core can be inserted onto this pressed and smooth surface without powder dust being whirled up.
  • inserting the core is made easier by the fact that the surface of the powder material is designed to be plane-parallel to the pressing surfaces of the lower punches.
  • a rotary press for the production of jacket core compacts can be provided in which the pre-compression station is equipped with a catch curve according to the invention, which allows the upper punch to dip in the region of this pre-compression station by a defined and reproducibly adjustable amount in the range of 0, 1 mm increments into the die hole.
  • the use of a closed pre-pressure curve according to the invention enables improved pressing results compared to the use of a pressure roller.
  • the use of the closed form curve according to the invention ensures homogeneous immersion of the upper punches in the die bores in the sense that all upper punches enter the die bores with the same immersion depth, with the exception of an almost negligible tolerance.
  • the pressing force signals As an important measured variable for characterizing the production process, can be reliably recognized and evaluated without noise signals. It was completely surprising that in this way in particular an improved weight control of the compacts obtained can be provided. Furthermore, the improved reliability of the pressing force signals makes it easier to sort out faulty compacts, as a result of which faulty sorting out of compacts whose weight is within a permissible tolerance range is reliably avoided.
  • the closed pre-pressure curve forms a lower area of a guide block, which is present integrated in the upper curve sequence of the at least one pre-pressure station.
  • the guide block can be made of plastic, but it can also be preferred for other applications if the guide block is made of another material, such as metal.
  • the terms guide block and plastic guide block are used synonymously below.
  • the lower area of the plastic guide block is formed by three different areas: in the middle of the lower area of the guide block is the area of the catch curve, with which the punch heads of the upper punches interact in such a way that they are caught by this catch curve in the event of a possible, uncontrolled fall . Starting from the middle, lower area of the guide block, the areas of the pull-down curve and the lift-up curve for the upper punches extend to the left and right.
  • the punch heads of the upper punches are guided along the pull-down curve into a work area below the upper pressure roller, where the pressing process for producing the compacts takes place. It is also known to the average person skilled in the art that in the area of the winding cam, the punch heads of the upper punches are guided back to the initial height of the upper punches, which is predetermined by the design of the upper cam carrier, after the pressing process has ended.
  • the three areas of the plastic guide block are advantageously connected to one another in such a way that the stamp heads can be guided smoothly.
  • the plastic guide block is configured to have a front, a back, and side surfaces, the front and back of the plastic guide block having a uniform outward camber, with the camber of the front and back of the plastic - Guide blocks replicates a circular base of a rotor of the rotary press.
  • the front of the plastic leader block is the side of the leader block that faces an outside viewer.
  • the back of the plastic guide block faces the central components of the rotary press, in particular the rotor and the matrix disc.
  • the rotor of a rotary press usually has a circular base area and is mounted centrally around an axis of rotation. The rounding of this rotor of the rotary press is reproduced from the front and the back of the plastic guide block in such a way that the guide block has essentially the same rounding in the area of the rotor as the rotor.
  • the guide block does not completely surround the rotor of the rotary press, but is only present in the area of a pressing station and therefore only follows the rounding of the rotor in a defined angular range. It is preferred that this angular range is essentially the same for the front and the back of the guide block, which ensures that the curvature of the front and the back of the plastic guide block is of the same design.
  • the curvature of the upper plastic guide block is always curved outwards.
  • the term "outwards" means that the curvature faces an outside observer of the upper course of the curve.
  • the plastic guide block includes a receiving bore for the upper pre-compression roller.
  • the closed pre-pressure cam for the upper punch is preferably located in a solid plastic guide block, which also includes a receiving bore for the upper pre-pressure roller.
  • This guide block is pushed with its curvature outwards onto the upper pre-compression roller, which preferably forms a connection between the pre-compression curve and the upper pre-compression roller.
  • the plastic guide block automatically follows this height adjustment.
  • the closed pre-compression curve advantageously also follows an adjustment of the upper pre-compression roller.
  • the closed form curve always has the preferred safety distance of preferably 0.09 to 0.11 mm, particularly preferably 0.1 mm, from the bottom dead center of the upper form rail, regardless of the position of the upper pressure roller.
  • this safety distance increases due to the head height of the upper punch heads, which prevents unwanted contact between the upper and lower punches in the die bores of the die table.
  • the guide block with the integrated pre-compression rail with the large bore sits directly on the upper pre-compression roller.
  • the height adjustment preferably takes place automatically and synchronously with the adjustment of the upper pre-compression rollers.
  • the side surfaces of the plastic guide block are rounded, with the rounded side surfaces engaging in counter-roundings of the curve elements adjoining the guide block in the upper curve run of the at least one pre-compression station.
  • One of ordinary skill in the art would know how rounded side surfaces of a plastics guide block must be designed and can be manufactured to cooperate with counter-curves of the adjacent curve elements. This interaction advantageously achieves interlocking of the plastic guide block with the adjoining curve elements. This ensures that the plastic guide block is securely fastened and guided within the upper cam carrier.
  • a linear up and down movement of the plastic guide block is advantageously made possible by the interaction of the rounded side surfaces of the plastic guide block with the counter-roundings of the adjoining curve elements.
  • the plastic guide block it is advantageously possible for the plastic guide block to follow an adjustment of the upper pressure roller.
  • Tests have shown that the use of a plastic guide block advantageously reduces the friction between the rounded side surfaces and the counter-curves, enabling low-maintenance and low-noise operation of the catch cam which is part of the plastic guide block.
  • a high level of guiding accuracy and immediate, ie in particular non-time-delayed, following of the catch curve when the upper pressure roller is adjusted is achieved.
  • the distance between a bottom dead center of the upper pressure roller and the punch heads of the upper punches has a minimum value of preferably 0.09 to 0.11 mm, particularly preferably 0.1 mm. In a further preferred embodiment of the invention, however, it can also be preferable for the distance between the bottom dead center of the pressure roller and the punch heads of the upper punch to have a greater value.
  • the height-adjustable catch curve of the rotary press is fastened to the connecting piece for connecting the catch curve to the upper pressure roller with fastening means, for example screws.
  • fastening means for example screws
  • a non-positive and positive fastening of the catch rail curve to the connecting piece is advantageously achieved.
  • This positive and non-positive connection advantageously allows the catch curve to be height-adjustable and also synchronously follows an adjustment of the upper pressure roller.
  • the catch curve can be exchanged if necessary. This is particularly advantageous when a cam has to be replaced due to wear.
  • the catch rail according to the invention can be exchanged in particular when there is a distance of preferably greater than 0.09 to 0.11 mm, particularly preferably 0.1 mm, between the punch heads of the upper punch and the bottom dead center of the pressure roller and the catch cam.
  • the term "present" being used in the sense that such a distance is required for the production of the pellets. Due to the interchangeability of the safety rail, great flexibility is achieved for different areas of application of the rotary press according to the invention.
  • the catch rail according to the invention can be used not only for rotary presses in which there is a minimal distance between the punch heads of the upper punch and bottom dead center of the upper pressure roller, but also for rotary presses in which this distance is greater than 0.1 mm for special applications having.
  • a rotary press that has a number of printing stations can be equipped with a number of catch curves according to the invention.
  • the decision as to whether a catch curve according to the invention is used is therefore up to the operator of the rotary press according to the invention.
  • a rotary press with a plurality of printing stations does not necessarily have a catch curve at each pressure station if the corresponding course of the curve in the area of individual pressure stations makes the use of the catch curves superfluous.
  • the invention can also be used to produce jacket-core compacts.
  • two pressing stations and an optional core insertion module can be provided within the rotary press.
  • the second pressing station preferably includes a second pressing roller without an adjustable pressing curve.
  • Upper punch and an upper punch guide can be arranged as part of the upper rotor part between the first and the second pressing station.
  • the guide block is arranged around the pre-compression roller of the pre-compression station, with the guide block preferably comprising a pre-compression roller mount.
  • the preferably semicircular lateral guides of the guide block are mounted in the guide counterpart on the left-hand side of the upper punch curve so that they can move axially.
  • the guide block with the integrated pressure curve is mounted on the first pressure roller, the position of the pressure curve preferably being adjustable automatically with the adjustment of the upper pressure roller. This advantageously makes it possible to adjust the immersion depth of the upper punch in the die.
  • figure 1 shows a view of a preferred embodiment of the upper curve run (1) of a rotary press with pre- and main pressure station and safety rail (7), in particular a view from a 10 o'clock position on the upper curve carrier (1) of a rotary press is shown.
  • the curved course (1) is preferably formed, among other things, by transfer rails (12, 13) which are used to fasten and receive further stations and their fastening means, for example screws.
  • the pre-compression station comprises a pre-compression roller (3) which includes a height adjustment (5), a transfer rail (6) to the main pressure roller (2) and a safety rail (7) with a holder (8) for the safety rail (7). It is preferred that the transfer rail (6) ensures the transition between the pre-compression area and the catch curve (7).
  • the curved carrier (1) preferably comprises pre-compression rails, which are preferably formed by a pull-down rail (15) and a transfer rail (6).
  • the curve sequence (1) comprises a main compression station with main compression roller (2) with which the actual tablet production takes place.
  • the main pressure roller (2) is preferably attached with a pressure roller bolt (9) to the pressure roller mount of a pressure roller station of the rotary press.
  • Below the main pressure roller (2) there is preferably a catch rail (7), which is preferably also referred to as a catch curve.
  • the catch rail (7) is connected to the pressure roller axle (4) in a simple manner via the collar bushing (10) and the holder (8).
  • the catch rail (7) is preferably located below the upper main pressure roller (2), preferably in the inner area of the curve run (1) behind the outer transfer rail (6) and the elevator curve (11) (shown in dashed lines).
  • the catch rail (7) is advantageously fastened to the bracket (8) with the screws (17.1 and 17.2).
  • the catch curve (7) is connected to the axis (4) of the upper pressure roller (2) by means of a connecting piece (8), which is also referred to as a holder in the context of the invention.
  • a connecting piece (8) which is also referred to as a holder in the context of the invention.
  • the bracket (8) At the upper end of the bracket (8) there is a through hole (19) into which the collar bushing (10) protrudes, which in turn is fastened in a blind hole in the end face of the pressure roller bolt (9).
  • the height of the upper main pressure roller (2) can be adjusted manually or automatically, resulting in different immersion depths for the upper punch (18) within the die bore.
  • the catch rail (7) to the axis (4) of the main pressure roller (2), which can preferably be formed by a roller bolt (4) of the main pressure roller (2), advantageously when the position of the upper main pressure roller (2) is adjusted the height position of the safety rail (7) also changes automatically and synchronously.
  • the catch rail (7) is 0.1 mm plus the height of the punch head below the bottom dead center of the upper main pressure roller (2).
  • the transfer rails (6 and 11), which are preferably also referred to as outer guide curves, are preferably matched to the maximum permissible immersion depth of the rotary press. As long as the upper main pressure roller (2) is set to a lower immersion depth than the maximum immersion depth during tablet production, the upper punch heads will not touch the outer safety rails due to the inner catch curve (7). This represents a significant advantage of the invention with regard to the operational reliability of the rotary press.
  • the punches (18, not shown) are passed under the pressure roller (2), being pushed down through the passage below the pressure roller (2), whereby by cooperation with the Lower stamps in the die bores the tablets are pressed. It is preferred that the catch curve (7) is arranged below the main pressure roller (3).
  • the form roller (3) is not equipped with a catch cam (7), since the guide rails in the area below the form rails do not permit greater immersion depths for the upper punch.
  • Screws (16.1 and 16.2) are shown as possible fastening means, which interact with a lifting curve (11) of the main pressure curve (2) shown in dashed lines, which is preferably arranged between the catch curve (7) and the transfer rail (12). You can also see a connection (14) for a multifunction plug.
  • figure 2 shows a view of a preferred embodiment of the upper curve sequence (1) with a rear view of the preliminary and main printing station. Shown are the pre-pressure roller (3) and the main pressure roller (2), with the height adjustment (5) also being visible with regard to the pre-pressure roller (3). Seen from the front, i.e. from the outside, the pull-down cam (15) of the pre-compression roller (3) is arranged on the left-hand side of the pre-compression roller (3), while the transfer rail (6) to the catch cam (7) is arranged on the right-hand side, viewed from the front .
  • the main pressure roller (2) Below the main pressure roller (2) is the (in figure 2 not shown) catch curve (7) arranged. It preferably has a holder (8) which is fastened to the upper curved run-off (1) with fastening means (17.1 and 17.2), for example screws.
  • a collar bushing (10) with a bore (19) is preferably located in an opening in the upper, preferably rounded area of the holder (8) of the safety rail (7). It is particularly preferred if the transfer rail (6) and the elevator curve (11) have recesses on the back, which advantageously ensure radial guidance of the holder (8) of the safety rail (7).
  • the upper punches (18, not shown here) can be guided in an area between the winding cam (11) of the main pressure roller (2) and the transfer rail (12) of the cam run (1).
  • the elevator cam (11) is fastened to the cam run (1) with fastening means (16.1 and 16.2), for example screws.
  • FIG 3 shows a view of a preferred embodiment of the safety rail (7).
  • This is advantageously fastened with the screws (17.1 and 17.2) to the bracket (8), which is located behind the main pressure roller (2) when viewed from the outside and has an opening in an upper area for receiving a collar bushing (10).
  • the pre-compression station with pre-compression roller (3) is preferably arranged from the outside in a clockwise direction and preferably does not have a catch rail (7).
  • the pre-compression roller (3) is preferably designed to be adjustable in height by means of a height adjustment device (5).
  • Numeral 4 designates the axis of the main pressure roller (2).
  • figure 4 shows a front view of a preferred embodiment of the guide block (20) as a single part with an integrated pressure curve (22, 23, 24) and a receiving bore (21) for the upper pressure roller (28, not shown).
  • the integrated pressure curve is preferably formed by a pressure rail in the "low pull" area (22), a pressure rail in the "catch rail” area (23) and a pressure rail in the "elevator” area (24), the pressure rail in the "low pull” area (22 ) forms a left-hand area of the integrated pressure curve viewed from the outside, the pressure rail in the “elevator” area (24) forms a right-hand area of the integrated pressure curve and the pressure rail in the “catch rail” area (23) forms a central area of the integrated pressure curve.
  • the pressure rail in the "catching rail” area (23) is preferably arranged lower or lower in comparison to the pressure rails in the "low pull” area (22) and the pressure rails in the "elevator” area (24), which results from the pull-down and elevator functions of the corresponding rails (22 and 24). It is particularly preferred if the guide block (20) includes the integrated pressure rail (22, 23, 24) and this is integrated in the guide block (20). It is further preferred that the integrated pressure rail (22, 23, 24) is referred to as a closed form curve within the meaning of the invention.
  • the receiving bore (21) is preferably also referred to as receiving the forme roller (3) or as a forme roller seat.
  • the adjustable pressure rail (22, 23, 24) with the guide block (20) is mounted inside the rotary press and is located on the upper pre-compression roller (28) of the first pressure station. It can be at the first pressing station for example, preferably be a tamping station.
  • the lateral, semicircular guides (25), which are preferably designed as round guides, are preferably located on the right and left side of an upper area of the illustrated preferred embodiment of the guide block (20), viewed from the outside.
  • figure 5 shows a possible installation situation of a preferred embodiment of the guide block (20) in a rotary press. Shown is the arrangement of the guide block (20) in relation to the upper pre-compression station (28) and the pressure roller bolt (9).
  • the guide block (20) preferably has a circular guide (25) in the upper area. Also shown are upper punches (32) and their guide heads, which interact with the pressure rollers in such a way that the upper punches (32) are pressed down when passing under the pressure rollers in order to form the tablets in cooperation with the lower punches in the die bores or a to effect pretension.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Claims (11)

  1. Presse à table tournante comprenant au moins une station de pressage, avec respectivement des rouleaux de pression supérieur et inférieur réglables en hauteur, qui sont montés dans l'au moins une station de pressage au moyen d'axes, dans laquelle des poinçons supérieurs guidés par came avec des têtes de poinçons sont amenés vers le rouleau de pression supérieur au moyen d'une came de commande, et une came d'élévation soulève les poinçons supérieurs à un point le plus haut au-dessus d'un dispositif de remplissage,
    caractérisée en ce que
    dans l'au moins une station de pressage, une came d'accrochage (7) réglable en hauteur par rapport à ce rouleau de pression supérieur (2) est disposée en dessous du rouleau de pression supérieur (2).
  2. Presse à table tournante selon la revendication 1
    caractérisée en ce que
    la came d'accrochage réglable en hauteur (7) est à une distance minimale de préférence de 0,09 à 0,11 mm, de manière particulièrement préférée de 0,1 mm, des têtes de poinçon du poinçon supérieur (18), lorsque le poinçon supérieur (18) passe le long d'un point mort inférieur du rouleau de pression supérieur (2).
  3. Presse à table tournante selon la revendication 1 et/ou 2
    caractérisée en ce que
    la came d'accrochage (7) est reliée à l'axe du rouleau de pression supérieur (3) au moyen d'un connecteur (8).
  4. Presse à table tournante selon une ou plusieurs des revendications précédentes,
    caractérisée en ce que
    le réglage de la came d'accrochage (7) s'effectue par rapport au rouleau de pression (2) manuellement et/ou automatiquement.
  5. Presse à table tournante selon la revendication 3
    caractérisée en ce que
    le connecteur (8) comporte un alésage (19) fixé sur une collerette (10), dans laquelle la collerette (10) est fixée sur un front arrière de l'axe (4) du rouleau de pression supérieur (2) .
  6. Presse à table tournante selon la revendication 3 ou 5
    caractérisée en ce que
    le connecteur (8) peut être fixé et/ou guidé au moyen d'évidements dans des faces arrières d'une came d'abaissement (6) et d'une came d'élévation (11) sur un chemin de came supérieure (1).
  7. Procédé selon une ou plusieurs des revendications précédentes
    caractérisée en ce que
    l'au moins une station de pressage est une station de pré-compression avec des rouleaux de pré-compression supérieurs (3) et inférieurs réglables en hauteur et une came de pré-compression fermée (22, 23, 24) est disposée dans le chemin de came supérieur (1) de l'au moins une station de pré-compression, qui est composé de plusieurs éléments de came.
  8. Presse à table tournante selon la revendication 7
    caractérisée en ce que
    la came de pré-compression fermée (22, 23, 24) forme une zone inférieure d'un bloc de guidage (20) qui est intégré dans le chemin de came supérieur (1) de l'au moins une station de pré-compression.
  9. Presse à table tournante selon la revendication 8
    caractérisée en ce que
    le bloc de guidage (20) présente un côté avant, un côté arrière et des surfaces latérales et le côté avant et le côté arrière du bloc de guidage présentent une courbure uniforme vers l'extérieur, dans laquelle la courbure des côtés avant et arrière du bloc de guidage en plastique (20) imite une surface de base circulaire d'un rotor de la presse à table tournante.
  10. Presse à table tournante selon la revendication 8 ou 9
    caractérisée en ce que
    le bloc de guidage (20) contient un alésage de réception (21) pour le rouleau de pré-compression supérieurs - 27 - (3).
  11. Presse à table tournante selon la revendication 9 ou 10
    caractérisée en ce que
    les surfaces latérales du bloc de guidage (20) sont arrondies, dans laquelle les surfaces latérales arrondies interviennent dans des contre-arrondis des éléments de cames se raccordant au bloc de guidage (20) dans le chemin de came supérieure (1) de l'au moins une station de pré-compression.
EP18153460.3A 2018-01-25 2018-01-25 Rail d'accrochage pour une presse à table tournante Active EP3517288B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP18153460.3A EP3517288B1 (fr) 2018-01-25 2018-01-25 Rail d'accrochage pour une presse à table tournante
ES18153460T ES2945984T3 (es) 2018-01-25 2018-01-25 Carril de seguridad para prensa rotativa
KR1020207023987A KR102547035B1 (ko) 2018-01-25 2019-01-08 회전 프레스용 어레스터 레일
CN201980010051.3A CN111655469B (zh) 2018-01-25 2019-01-08 旋转压力机
US16/964,768 US11919268B2 (en) 2018-01-25 2019-01-08 Safety rail for a rotary press
PCT/EP2019/050289 WO2019145138A1 (fr) 2018-01-25 2019-01-08 Rail de retenue pour une presse à table tournante
JP2020560548A JP2021511968A (ja) 2018-01-25 2019-01-08 ロータリープレスの制止レール

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18153460.3A EP3517288B1 (fr) 2018-01-25 2018-01-25 Rail d'accrochage pour une presse à table tournante

Publications (2)

Publication Number Publication Date
EP3517288A1 EP3517288A1 (fr) 2019-07-31
EP3517288B1 true EP3517288B1 (fr) 2023-04-12

Family

ID=61027569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18153460.3A Active EP3517288B1 (fr) 2018-01-25 2018-01-25 Rail d'accrochage pour une presse à table tournante

Country Status (7)

Country Link
US (1) US11919268B2 (fr)
EP (1) EP3517288B1 (fr)
JP (1) JP2021511968A (fr)
KR (1) KR102547035B1 (fr)
CN (1) CN111655469B (fr)
ES (1) ES2945984T3 (fr)
WO (1) WO2019145138A1 (fr)

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Also Published As

Publication number Publication date
WO2019145138A1 (fr) 2019-08-01
KR102547035B1 (ko) 2023-06-26
US20210053309A1 (en) 2021-02-25
CN111655469A (zh) 2020-09-11
CN111655469B (zh) 2022-06-07
EP3517288A1 (fr) 2019-07-31
JP2021511968A (ja) 2021-05-13
KR20200108471A (ko) 2020-09-18
US11919268B2 (en) 2024-03-05
ES2945984T3 (es) 2023-07-11

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