Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/06—Platens or press rams
  • B30B15/065—Press rams

Definitions

• the invention relates to a lower punch for a tableting machine, which has a lower punch shaft on which at least one lower punch insert is arranged.
• Lower punches representing such parts of a tabletting tool are known and are used in tabletting machines for the production of tablets.
• the lower punch insert of the lower punch cooperates with a die, which is arranged in a fixed position on the tabletting machine.
• the problem arises with lower punch inserts with small diameters or with filigree shapes that the torque occurring during the production of the tablets on the lower punch shaft can no longer be transferred from the known lower punch inserts to the die without the lower punch inserts breaking ,
• a key is provided in the known lower punches, which is guided in a lower punch guide of the tabletting machine and thus prevents the lower punch from rotating and the associated torque and / or bending load on the lower punch.
• the lower punch has an eccentrically arranged and extending in the axial direction guide bore into which a guide pin is immersed, which is arranged in a fixed position in a die cooperating with the lower punch, so that the guide pin opens up and down moving lower punch leads during this lifting movement.
• the measures according to the invention advantageously create a lower punch for a tableting machine, in particular a tableting press, which is also advantageously used in tableting machines and in particular tableting presses can be used that do not have their own lower punch guide.
• the measures according to the invention have the advantage that the entire lower punch guide according to the invention, namely the guide bore arranged in the interior of the lower punch shaft and the guide pin cooperating therewith, is arranged essentially completely in the radial direction inside the lower punch, so that the lower punch according to the invention is received No known conversion measures are required in known tabletting machines which do not have their own lower punch guide.
• This has the advantage that existing, known tabletting machines can also be equipped with the lower punch according to the invention in an advantageous manner.
• the design of the lower punch according to the invention thus makes it possible to use tabletting tools which have sensitive inserts, even in such known tabletting machines without their own lower punch guide.
• An advantageous development of the invention provides that an insert holder carrying the at least one lower stamp insert, in particular a lower stamp perforated plate, is inserted in the lower punch shaft, and that this insert holder has a passage opening for the guide pin guiding the lower stamp shaft, which in the inserted state with the Guide bore of the lower punch shaft is aligned.
• Such a measure has the advantage that different lower punch inserts can be used in the lower punch shaft of the lower punch according to the invention, simply by replacing the insert holder carrying the lower punch inserts.
• Figure 1 shows an embodiment of the lower stamp together with a
• Figure 2 is an enlarged view of the lower punch and the die
• FIG. 1 shows a tabletting tool 1 which is known per se and is therefore only described in part, which is divided in a known manner into an upper punch 2, a lower punch 3 and a die 4.
• the die 4 is in turn, in a manner known per se, firmly fixed in a tabletting machine, not shown, using the tabletting tool 1, while the upper punch 2 and the lower punch 3 move up and down during the production process of tablets, pellets or similar compresses ,
• the lower punch 3 and the upper punch 2 are arranged in corresponding guides of the tabletting machine, the upper punch 2 in the case shown here having a feather key 2 'which interacts with the upper punch guide of the tabletting machine and prevents torque and / or a bending stress can occur which would lead to the upper punch insert (s) 2a of the upper punch 2, of which only one is shown in FIG. 1, being damaged.
• the lower punch shaft 10 of the lower punch 3 is thus guided during an up and down movement by the guide pin 12 fixed in the die 4, so that a "nodding" of the lower punch shaft 10 carrying the lower punch inserts 6, which leads to an undesirable bending load on the lower punch inserts 6 would be prevented or at least counteracted.
• the eccentric that is to say eccentric arrangement of the guide bore 11, in cooperation with the guide pin 12 fixed to the die 4, has the effect that since the die 4 is in turn firmly connected to the tabletting machine, the lower punch shaft 10 cannot twist during the up and down movement. can therefore not perform a rotational movement about its axis, so that the occurrence of a torque load, caused by a rotation about the axis of the lower punch shaft 10, is prevented on the lower punch inserts 6.
• the lower punch inserts 6 immersed in bores 4b of the die 4 are not arranged directly on the lower punch shaft 10, but on an insert holder 8 - here designed as a lower punch perforated plate 7 are arranged, which in turn is attached to the lower stem 10.
• the lower punch shaft 10 has a receiving bore 10a into which a guide insert 7a of the lower punch perforated plate 7 engages, which is fixed in the lower punch shaft 10 by suitable means.
• the lower punch perforated plate 7 has a passage opening 14 for the guide pin 12 which is aligned with the guide bore 11 of the lower punch shaft 10, which has a vent opening 18, so that the guide pin 12 can be inserted through the passage opening 14 into the guide bore 11 of the lower punch shaft 10.
• the guide pin 12 is mounted in the die 4 in a receiving bore 16 and is fixed in position in the die 4 by means of a locking element 17.
• the guide pin 12 is formed as an integral part of the die 4, but the first-mentioned training option is preferred, since this enables the guide pin 12 to be exchanged in a simple manner, for example in the event of a defect, and also known, already existing matrices can be easily retrofitted by introducing the mounting hole 16 into them.
• the measures described make it possible in an advantageous manner to use lower punches with sensitive lower punch inserts, even in the case of already existing tableting machines which do not have their own lower punch guides, which, until now, has not been possible in a disadvantageous manner. Since the entire technical measures are arranged within the lower punch shaft 10, it is advantageously not necessary that conversion measures have to be carried out in the area of their lower punch guides in the known tabletting machines.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)
• Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Medicinal Preparation (AREA)

Priority Applications (3)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26010094

Family Applications (1)

Country Status (5)

Cited By (1)

Citations (7)

Family Cites Families (2)

• 2002
  • 2002-08-31 EP EP02797940A patent/EP1423261B1/de not_active Expired - Lifetime
  • 2002-08-31 AT AT02797940T patent/ATE330782T1/de not_active IP Right Cessation
  • 2002-08-31 WO PCT/EP2002/009745 patent/WO2003022559A1/de active IP Right Grant
  • 2002-08-31 DE DE50207321T patent/DE50207321D1/de not_active Expired - Lifetime
  • 2002-08-31 JP JP2003526664A patent/JP3917134B2/ja not_active Expired - Fee Related

Patent Citations (7)

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