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
  • B30B11/02—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
  • B30B15/30—Feeding material to presses
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/30—Feeding material to presses
  • B30B15/302—Feeding material in particulate or plastic state to moulding presses
  • B30B15/304—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds
  • B30B15/306—Feeding material in particulate or plastic state to moulding presses by using feed frames or shoes with relative movement with regard to the mould or moulds for multi-layer articles

Definitions

• the invention relates to a rotary tableting machine and a method for producing a multilayer tablet.
• Rotary tabletting machines are known.
• a rotor of the rotary tableting machine is set in rotation by means of a drive machine.
• the rotor comprises dies arranged on a circumferential line with associated upper punches and lower punches.
• the matrices are filled with a molding compound and depending on the angular position of the rotor guided over guide curves lower punch and upper punch are axially displaced to the matrices.
• the lower and upper punches are guided past at least one pressing station, usually at a pre-pressing station and a main pressing station.
• the upper and lower punches are guided past stationary stationary pressure rollers substantially cam-controlled, so that a pressing force can be applied to the introduced into the matrices molding compound.
• Rotary tableting machines are known, by means of which so-called multi-layer tablets can be produced which comprise a plurality of layers and / or inserts.
• several filling devices and pressing stations are arranged successively over the circumference of the rotor.
• Depending on the number of layers and / or inserts therefore requires a correspondingly large circumference of the rotor. This is accompanied by a relatively large space requirement of the rotary tabletting machine.
• the invention is therefore based on the object of specifying a rotary tableting machine of the generic type and a method for producing a multilayer tablet, by means of which in a simple manner, in particular small quantities of multi-layer tablets can be produced.
• this object is achieved by means of a rotary tableting machine with the features mentioned in claim 1 and a method for producing a multilayer tablet having the features mentioned in claim 16.
• a filling device has at least two independently loadable filling chambers, wherein the filling chambers are successively brought into a defined filling positions, wherein preferably the filling chambers during the rotation of the die table are successively continuously brought into the filling position, is advantageously possible, a small-sized rotary -Tablettiermaschine, can be made with the multilayer tablets.
• the circumference of the die table can be reduced to the minimum that is necessary in order to fill and press the dies, possibly to pre-press and to press them.
• the successive subsequent generation or positioning of the layers or inserts during a revolution of the die table thus eliminated.
• the number of matrices and stamp pairs is thus significantly reduced.
• such small-sized rotary tableting machines can be used as laboratory machines or as experimental machines.
• the filling device comprises a plurality, that is to say at least two, sequential chambers which can be controlled individually (successively). The respective filling of the chambers takes place under production conditions.
• the filling device is a rotatable Kammer spallschuh with at least two filling chambers.
• the rotation of the Kammer spallschuhs takes place here preferably during the circulation of the filled die, so that when the die arrives with the pressed first layer in the filling position, the next layer can be fed via the rotatable Kammer spallschuh.
• the filling device preferably has six chambers arranged in a star shape about the axis of rotation of the chamber filling shoe.
• all but one chamber preferably serve all the chambers for loading the matrices, while one, the logically last chamber of the chamber filling shoe, preferably serves to remove the pressed multilayer tablet.
• the last (sixth) chamber allows in the open contour the lifting of the tablets to the discharge point (part of the motorized lower curve) between filling / metering and pressure roller (maximizing the length of the discharge curve).
• the necessary movement of the chamber filling shoe is preferably carried out by means of a drive which continuously drives a combination of linear and rotary movement allows, so that a deep engagement in the Matrizenteil Vietnamese is possible and results in a maximum filling distance.
• the pressing device of the rotary tabletting machine has a main pressure roller pair.
• the pressure rollers of the main pressure roller pair are arranged vertically adjustable with respect to the die table.
• the pressing force with respect to the filling level in the matrices which in turn depends on the number and the thickness of the individual layers or inserts, can be set exactly.
• the height adjustment of the pressure rollers by means of suitable drives, in particular by servomotors, pneumatic drives or the like.
• the exact positioning of the pressure rollers can be done via a position measuring system, which serves a data feedback.
• the drives used allow extremely fast, highly accurate and repeatable positioning.
• the guide curves for the lower punches and / or upper punches are height-adjustable relative to the die table. It is preferably provided that the guide curves are height-adjustable in segments independently of each other. In this way, the punch stroke of both the upper punch and / or the lower punch can be adjusted to the multilayer tablet to be produced as a function of the already pressed layers. In addition, the removal of the finished pressed multilayer tablet is also possible in a simple manner.
• the guide rails or the individual segments of the guide rails are controlled via suitable drives. The exact positioning of the guide rails can be done via a position measuring system, which serves a data feedback. The drives allow extremely fast, highly accurate and repeatable positioning.
• the further matrices of the die table are preferably designed as blind matrices.
• Figure 1 is a schematic plan view of a rotary tableting machine
• Figure 2 schematically shows the development of a rotor of a rotary tabletting machine
• Figure 3 is a block diagram for controlling a rotary tableting machine.
• Rotary tableting machines are well known, so that in the following description is dispensed with a detailed description of structure and function. Only the essential components of the invention will be explained.
• the rotary tableting machine 10 comprises a die table 12, which is rotatable about an axis 14 by means of a drive machine, not shown, usually an electric motor.
• the die table 12 has a number of dies 16 on a circumferential line. The number of dies 16 depends, on the one hand, on a diameter of the die table 12 and / or a diameter of the dies 16. At least one of the dies 16 is likewise not in FIG shown pair of a top stamp and a bottom stamp assigned.
• the rotary tabletting machine 10 further comprises a filling device, generally designated 18, which is designed as a chamber filling shoe 20.
• the chamber filling shoe 20 has a number, in this case six, of filling chambers 24 arranged symmetrically about an axis of rotation 22.
• the chamber filling shoe 20 can be rotated by means of a drive, not shown in FIG. 1, in predetermined angular steps or continuously about the axis of rotation 22.
• the rotary tabletting machine 10 comprises a pressing device 26, which comprises pressure rollers 30 rotatably mounted about an axis of rotation 28.
• a pressure roller 30 is arranged above the die table 12 and a pressure roller 30 below the die table 12.
• the rotary tableting machine shown in FIG. 1 has the following general functions:
• the individual filling chambers 24 of the Kammer Stahlllschuhs 20 are filled with different mass to be pressed.
• the introduced into the individual filling chambers mass depends on the subsequent layer structure of the multilayer tablet to be produced.
• Of the filling chambers 24 is always exactly one filling chamber in a filling position. This filling position is taken when the matrices of the die table to be filled pass below the filling chamber 24 located in the filling position.
• All other matrices 16 of the die table 12 are provided with blind matrices so that they can not be filled.
• the die table 12 also has only one or a small number of juxtaposed dies 16.
• the die table 12 rotates about the axis of rotation 14. As a result, the corresponding die 16 is filled.
• the height results from the position of the correspondingly assigned sub stem feed.
• the punch guides of the lower or upper punches and / or the pressure rollers 30 can be adjusted in height relative to the plane of the die table 12 in a manner yet to be explained. This makes it possible to achieve an exact desired pressing result in connection with the desired pressing forces and layer heights.
• the further layers of the multilayer tablet can now be produced in the case of a chamber filling shoe 20 having six filling chambers 24, ie up to six layers.
• fewer or more layers of a multilayer tablet can be produced by the Kammer Stahlllschuh 20 has a corresponding number of filling chambers 24, that is, more or less than six. Also, filling chambers 24 can not be filled, so that during the passage of the matrices
• the multilayer tablets to be produced are finished pressed, they are ejected from the dies 16.
• the corresponding lower punches are brought into a corresponding ejection position, so that the tablets can be removed via a scraper, not shown.
• one of the filling chambers 24 - virtually the last logical filling chamber 24 - to use as an ejector.
• this filling chamber 24 is open to the edge of the Grepschuhs 20 and thus forms when this open-edge filling chamber (ie ejection chamber) is in filling position, the ejector.
• the logically last chamber does not serve as ejector, but allows in the open contour of the chamber lifting the tablets to the discharge point between dosage / filling and pressure roller.
• the lifting of the tablet is carried out by the still to be explained adjustment of the lower punch guide. Overall, this results in a longer output curve.
• Other known solutions such as blowing or aspirating the compressed multilayer tablets, are also possible. It can also be the respective end of the filling chambers are used to remove the finished multilayer tablet from the machine. The arrangement of additional scrapers can be omitted.
• FIG. 2 shows, in purely schematic form, the development of a die table 12 of the rotary tableting machine 10.
• the die table 10 has the dies 16 only indicated here on. As already explained, when used as a laboratory machine only one or a small number of adjacently arranged dies 16 are filled.
• the other matrices 16 are either designed as blind matrices or not present.
• the Kammer spallschuh 20 which is gradually rotatable about the rotation axis 22.
• the Kammer spallschuh 20 is assigned here a total of 36 designated filling device. This consists of a total of five filling sluices 38, wherein in each case via a filling lock 38 exactly one filling chamber 24 of the Kammer hypollschuhs 20 is filled with the corresponding material to be pressed.
• a punch guide 40 for upper punch and a punch guide 42 for lower punch.
• a lower punch 44 is shown, which is currently in the filling position.
• the punch guide 40 for the upper punches and the punch guide 42 for the lower punches consists of a plurality of segments 44 and 46 adjoining each other over the circumference.
• the segments 44 and 46 flow into each other, so that one runs along the punch guide 40 or punch guide 42 guided stamp as resistant as possible along its respective guideway is movable.
• the punch guide 40 and 42 embrace the entire circumference of the die table 12 and thus also lead along the pressure rollers 30.
• the individual segments 44 and 46 are connected to drives 52 indicated here. By means of these drives, the segments 44 and 46 can be displaced relative to the die table 12, that is, the distance can be varied according to the indicated double arrows 50.
• the pressure rollers 30 can also be relative to here indicated drives 52 relative to the indicated double arrows 50 with respect to the die table 12 away from this or towards this.
• the rotary tabletting machine 10 shown in FIG. 2 shows the following functions in connection with the already explained explanations regarding FIG. 1:
• the matrix 16 located in the filling position is filled via the logically first filling chamber 24 (FIG. 1) of the chamber filling shoe 20 with a powder 56 to be pressed which results in a first layer of a multilayer tablet.
• the filling of the dies 16 via a filling shoe is generally known, so that it should not be discussed further in the context of the present invention.
• the powder 56, which is now located in the die 16 is pressed by means of the lower punch 44 and the correspondingly associated upper punch, by moving these punches toward one another in accordance with the course of the punch guides 40 and 42.
• the stamp stroke of the lower and upper punches can be different.
• the punches are guided in a known manner past the pressure rollers 30, so that a defined pressing force is exerted on the powder 56, so that a first layer of the tablet is produced.
• this second layer is pressed.
• the punch guide 40 or 42 is displaced correspondingly relative to the die table 12 via the drives 48, so that the punch stroke is thus displaced. is changeable. In the same way, a relative displacement of the pressure rollers 30 to the die table 12 take place, so that here too a defined pressing force for the second layer is adjustable.
• the further layers-according to the exemplary embodiment up to five layers-are then filled into the die 16.
• the relative position of the punch guide 40 or 42 and / or the pressure rollers 30 to the die table 12 can be changed.
• a five-layered tablet can be pressed.
• the tablet is then ejected by, for example, raising the corresponding segments 46 of the punch guide 42 so far that the tablet is pushed out of the dies 16 via the lower punches 44.
• a logically last chamber of the Kammerhellschuhs 20 can then serve as a scraper for the compressed tablet.
• FIG. 3 shows in a block diagram the basic control sequence.
• FIG. 3 shows a control unit 60.
• the control unit 60 can also carry out further control and / or regulating operations of the rotary tablet tableting machine, which are not to be considered in detail here.
• Via an input device 62 is the control unit 60 predetermined, which type of multi-layer tablets or which number of multi-layer tablets to be produced. In particular, the number and layer heights of the individual layers of the multilayer tablet and pressing forces with which the individual layers are to be pressed can also be predetermined.
• Via memory means 64 for example, a previously stored sequence of control commands corresponding to the input made can be called up via the input means 62.
• the control unit 60 controls the drive machine 66 of the die table 12.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)
• Basic Packing Technique (AREA)
• Medicinal Preparation (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37027935

Family Applications (1)

Country Status (6)

Families Citing this family (9)

Citations (1)

Family Cites Families (11)

• 2005
  • 2005-06-23 DE DE102005030312A patent/DE102005030312B4/de not_active Expired - Fee Related
• 2006
  • 2006-06-23 JP JP2008517515A patent/JP5175720B2/ja not_active Expired - Fee Related
  • 2006-06-23 WO PCT/EP2006/063510 patent/WO2006136611A1/de active Application Filing
  • 2006-06-23 EP EP06777448A patent/EP1893402A1/de not_active Withdrawn
  • 2006-06-23 US US11/917,248 patent/US20080308961A1/en not_active Abandoned
  • 2006-06-23 KR KR1020077030079A patent/KR20080015869A/ko not_active Application Discontinuation

Patent Citations (1)

Also Published As

Similar Documents

Legal Events