JP2005502470A - Lower punch of a tableting machine - Google Patents

Abstract

The invention relates to a bottom die for a tabletting machine, comprising a bottom die shaft (10), upon which at least one bottom die set (6) is arranged. According to the invention, the bottom die shaft (10) has an eccentrically arranged guide drilling (11), running in the axial direction, in which a guide pin (12) is inserted, which may be fixed in a block (4) co-operating with the bottom die (3), such that the guide pin (12) guides the rising and descending bottom die (3) during the stroke movement thereof.

Description

【Technical field】
[0001]
The present invention relates to a lower punch of a tableting machine, and the lower punch has a lower punch shaft provided with at least one lower punch core (insert).
[0002]
Such lower punches that form part of a tableting tool are known and are used in tableting machines that make tablets. The lower punch core (insert) cooperates with the die and is provided so as not to move in the tableting machine. When making tablets, especially pellets with such a tableting machine, the torque acting on the lower punch shaft, especially for the core (insert) for the lower punch having a core with a thin diameter or delicate shape If this is transmitted to the die, there is a problem that the core (insert) of the lower punch is broken. For this reason, an adjustment spring has been provided so far, which is guided by the lower punch guide of the tableting machine, thus preventing the lower punch from rotating and torque related. And / or a bending load is not applied to the lower punch.
[0003]
Many tableting machines, especially in the Asian region, do not have such a lower punch guide, and are therefore currently sensitive lower punch cores (inserts) or delicate shapes and / or The lower punch core (insert) with a small diameter cannot be used.
[0004]
The object of the present invention is to first develop the lower punch as described above, whereby a lower punch core (insert) having a small diameter and / or a delicate shape can be formed without a lower stamp guide. It can be used for a lock machine.
[0005]
This problem is that the lower punch shaft is eccentric and has a guide hole extending in the axial direction, and a guide pin is inserted into this hole, and this guide pin is fixed to a die that cooperates with the lower punch. As a result, the present invention is solved by the present invention in which the guide pin guides the lower punch when the lower punch moves up and down.
[0006]
The advantageous means according to the invention constitute a lower punch for a tableting machine, in particular a tablet press, which can be used in a tableting machine, in particular a tablet press without its own lower punch guide. Is. The advantage obtained by the means according to the invention is that the entire lower punch is guided, i.e. the guide aperture is arranged inside the shaft of the lower punch, and a guide pin cooperating therewith is provided on the lower punch. The lower punch according to the present invention can be mounted without any modification of the known tableting machine which is formed substantially completely radially inside and does not have the lower punch in itself. . The advantage of this is that the lower punch according to the invention can be used in an advantageous manner in an already existing tableting machine. Therefore, the lower punch according to the present invention can use a tableting tool having a fragile core (insert) in a tableting machine that does not itself have a lower punch guide.
[0007]
In an embodiment with further advantages of the invention, clamping means for at least one core (insert) of the lower punch are attached to the shaft of the lower punch, in particular to the clamping plate of the lower punch, The clamp means is provided with a guide hole for a guide pin that leads the lower punch shaft, and the guide pin is arranged so as to be aligned with the guide hole of the shaft of the lower punch. By such means, there is an advantage that various lower punch cores (inserts) can be attached to the lower punch shaft simply by changing the clamping means of the lower punch core (insert).
Further advantageous embodiments of the invention are the subject of the dependent claims.
[0008]
Further details and advantages of the invention will be described by way of preferred embodiments, which will be described below with reference to the drawings showing this.
[0009]
FIG. 1 shows a tableting tool known per se, which, as is known, includes an upper (upper) punch 2, a lower (lower) punch 3, and a die (die). 4. The die 4 is attached in a known manner to a tableting machine (not shown) that uses the tableting tool. The upper punch 2 and the lower punch 3 move up and down during the manufacture of tablets, pellets or similar products. For this purpose, the lower punch 3 and the upper punch 2 are arranged along the respective guiding means of the tableting machine, and the upper punch 2 has an adjustment spring 2 ', which is used for tableting. In cooperation with the guide means of the upper punch 2 of the machine, during the tableting operation, torque and / or bending load is generated, so that the insert 2a of the upper punch 2 (only one insert 2 is shown in FIG. 1). Is not to be damaged.
[0010]
As described above, many tableting machines are not provided with guide means for preventing the lower punch 3 from rotating, and thus far, in the tableting machine as described above, One or more lower punch inserts 6 (only one insert is shown in FIGS. 1 and 2) could not be used. In order to be able to use the lower punch 3 having the insert 6 of the sensitive lower side punch in the tableting machine as described above, the lower punch shaft of the lower punch of the tableting tool 1 is used. The guide opening 11 is provided along the axial direction A at an eccentric position. A guide pin 12 is inserted into the guide hole 11, and the pin is fixed to the die 4 as can be seen in detail from FIG. Therefore, the lower punch shaft 10 of the lower punch 3 is guided to the guide pin 12 fixed to the die 4 while moving up and down, so that an undesirable bending load is applied to the insert 6 of the lower punch. This prevents the lower punch shaft 10 from bending the insert 6 of the lower punch, or at least counters it. The guide hole 11 which is eccentric and deviated from the center is arranged so that the die 4 and the die 4 cooperate with a guide pin 11 fixedly attached to the tableting machine, and the lower punch shaft 10 is moved up and down. For example, the shaft cannot rotate around the axis, and is generated by the rotation about the axis of the lower punch shaft and acts on the lower punch insert 6 The load can be prevented.
[0011]
As can be clearly understood from FIG. 2, the lower punch insert 6 that enters the hole 4b of the die 4 is not directly provided on the lower punch shaft 10 due to the configuration of the lower punch 3 described. In the example shown, this means is provided as a lower punch / clamp plate 10, which is attached to the lower punch shaft 10. The lower punch shaft 10 has a receiving hole 10a into which the guide insert 7a of the lower punch / clamp plate 7 is inserted. The plate is attached to the lower punch shaft 10 by appropriate means. It has been.
[0012]
The lower punch / clamp plate 7 has a through hole 14 through which the guide pin 12 passes. This through hole is aligned with the guide opening 11, and the guide opening has an air hole 18. The guide pin 12 can be inserted into the guide opening 11 of the lower punch shaft 10 through the through hole 14.
[0013]
Here, the last point to be touched is preferably that the guide pin 12 is positioned in the receiving hole 16 of the die 4 and fixed to the die 4 by the fixing means 17. Further, it is possible to form the guide pin 12 integrally with the die 4, but the embodiment described above is preferable, and this can be simply replaced if the guide pin 12 fails. Moreover, it is only necessary to provide the receiving hole 16 in the conventional die.
[0014]
In short, the above-mentioned means makes it possible to provide a lower punch having a sensitive lower punch insert in a tableting machine that has never been equipped with a lower punch guide means, which has been impossible until now. It is. Since the entire technical means is arranged on the lower punch shaft, as far as the lower punch is concerned, it is effective to be able to do without modifying the existing tableting machine.
[Brief description of the drawings]
[0015]
FIG. 1 shows an embodiment of a lower punch together with a die and an upper punch.
FIG. 2 is an enlarged cross-sectional view of a lower punch and a die in FIG.

Claims (5)

A lower punch shaft (10) is provided on the lower punch of the tablet machine in which at least one lower punch core (6) is disposed. ) Has an eccentrically arranged guide opening (11) provided along the axial direction, and the opening has a guide pin (12) extending along the guide hole (11). It is fixed to a die (4) that cooperates with the side punch (3), whereby the guide pin (12) is guided while the lower side punch (3) moves up and down. Things to do. The lower punch (3) has at least one core clamping means (8) which receives the lower punch core (6), which core clamping means (8) has a through-hole. The lower punch according to claim 1, characterized in that the through hole is aligned with a guide opening (11) of the lower punch shaft (10). 3. The lower punch shaft (10) has a receiving hole (10a), into which the guide insert (7a) of the core clamping means (8) is inserted. Lower punch. 4. The lower punch according to claim 2, wherein the core clamping means (8) is a clamp plate (7) for the lower punch. A lower punch according to any one of the preceding claims, characterized in that the guide aperture (11) of the lower punch shaft (10) has an air vent aperture (18).