Turntable for tablet press

Abstract

The utility model discloses a rotary table for a tablet press, which comprises a rotary table body, a plurality of middle die holes penetrating through the rotary table body are arranged on the rotary table body, metal sleeves are detachably arranged in the middle die holes, a liquid flow channel is arranged in the rotary table body, a connector is arranged on the outer side wall of the rotary table body, and the metal sleeves are detachably arranged in the middle die holes. One end of the connector is communicated with the liquid flow channel, and the other end of the connector is communicated with a cold source. According to the rotary table for the tablet press, the detachable metal sleeve is arranged in the middle die hole, when the metal sleeve is abraded, only a new metal sleeve needs to be replaced, the abrasion time of the middle die hole is greatly delayed, and therefore the service life of the rotary table is prolonged, and cost is saved; the liquid flow channel connected with the cold source is arranged in the turntable body, so that the turntable body can be cooled, the turntable disclosed by the utility model can be applied to some powder which is not resistant to temperature, and the application value and the application range of the turntable are greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tablet presses, in particular to a rotating disc for a tablet press. Background Art

[0002] A tablet press is a device that presses powder and / or granular materials into tablets. It mainly includes a punch head, a turntable, a feeding mechanism and other components. Among them, the turntable is one of the main components of the tablet press. Its main function is to form a middle die for filling powder so that the punch head can press tablets smoothly in the middle die.

[0003] The current turntable for tablet press has a relatively simple structure, which is usually a turntable body and several middle die holes that penetrate the turntable body. However, in actual use, the inventor found that the pressure of the punch head can reach up to tens of MPa. Under such high pressure conditions, the die holes are easily worn, resulting in inconsistent specifications of subsequent tablets, which does not meet actual production needs; when the middle die holes are worn, a new turntable is usually replaced, resulting in increased use costs. At the same time, the existing tablet press is in continuous operation. During the long-term tableting process, the temperature of the turntable and the punch head will slowly rise. At the same time, during the tableting process, under the action of high pressure, the temperature of the powder in the middle die hole will also rise. For some powders, especially drug powders, they may be partially or even completely degraded under higher temperature conditions, thus limiting the use of the tablet press. Utility Model Content

[0004] In order to solve at least one of the above problems, the utility model provides a turntable for a tablet press, which has a long service life and can reduce the temperature of tablets, thereby making its application range wider.

[0005] The technical solution of the utility model is: a turntable for a tablet press, comprising a turntable body, a plurality of middle die holes penetrating the turntable body are arranged on the turntable body, a metal sleeve is detachably arranged in the middle die hole, a liquid flow channel is arranged inside the turntable body, a connector is arranged on the outer side wall of the turntable body, one end of the connector is connected with the liquid flow channel, and the other end is connected with a cold source.

[0006] An implementation manner of the utility model is that an annular mounting ring is provided at one end of the metal sleeve, and the metal sleeve is detachably arranged inside the middle mold hole through the mounting ring.

[0007] An implementation manner of the utility model is that the outer wall of the metal sleeve is in contact with the inner wall of the middle mold hole.

[0008] An implementation manner of the utility model is that a side wall of the metal sleeve is provided with a small hole.

[0009] An implementation manner of the utility model is that at least one circle of liquid flow channel is provided outside any of the middle mold holes.

[0010] Beneficial effects: The turntable for a tablet press of the utility model has a detachable metal sleeve arranged in the middle die hole. When the metal sleeve is worn, only a new metal sleeve needs to be replaced, which greatly delays the wear time of the middle die hole, thereby extending the service life of the turntable and saving costs. By arranging a liquid flow channel connected to a cold source inside the turntable body, the turntable body can be cooled, so that the turntable of the utility model can be applied to some temperature-sensitive powders, greatly increasing the application value and application range of the turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of this embodiment;

[0012] Figure 2 Schematic diagram of the cross-sectional structure of the middle die hole;

[0013] In the figure, 1 is the turntable body, 2 is the middle mold hole, 3 is the metal sleeve, 4 is the connector, 5 is the liquid flow channel, 301 is the mounting ring, and 302 is the small hole. DETAILED DESCRIPTION

[0014] The specific implementation methods of the present invention will be clearly and completely described below in conjunction with examples and drawings. Obviously, the described examples are only part of the embodiments of the present invention, rather than all of the embodiments.

[0015] like Figures 1-2 As shown, a turntable for a tablet press comprises a turntable body 1, the turntable body 1 is provided with a plurality of middle die holes 2 penetrating the turntable body 1, a metal sleeve 3 is detachably provided in the middle die hole 2, a liquid flow channel 5 is provided inside the turntable body 1, a connector 4 is provided on the outer side wall of the turntable body 1, one end of the connector 4 is connected to the liquid flow channel 5, and the other end is connected to a cold source.

[0016] Specifically, the turntable body 1 is similar to a conventional turntable, and its structure is made of metal material, such as stainless steel, etc. At the same time, a rotating shaft is provided in the middle of the turntable body 1, through which the turntable body 1 can rotate under the action of an external rotational force source (such as a servo motor). This setting is a conventional setting in the field, so its specific details are not repeated. At the same time, since the corresponding connector 4 and cold source are provided in this embodiment, in order to enable the connector 4 and the cold source to be used normally, in actual use, the external rotational force source can work in a forward-reverse manner in sequence, and the existing equipment and technology can realize the aforementioned rotation method.

[0017] A plurality of middle die holes 2 are arranged around the rotating axis of the turntable body 1. Generally speaking, the middle die holes 2 are used to fill powder or granules and form tablets using a punch head. Therefore, the inner wall of the middle die hole 2 is usually subjected to a large pressure. During long-term use, the inner wall of the middle die hole 2 will be worn, and a new turntable needs to be replaced.

[0018] In order to reduce the replacement frequency of the turntable body 1 and extend the life of the turntable body 1, the inventor sets a detachable metal sleeve 3 in the middle die hole 2. The top of the metal sleeve 3 is provided with an annular mounting ring 301 for installation. The size of the mounting ring 301 is larger than the size of the middle die hole 2, so that the mounting ring 301 can be set on the upper surface of the turntable body 1. In order to avoid the unevenness of the upper surface of the turntable body 1, a groove is provided on the upper surface of the turntable body 1. The size of the groove is the same as the size of the mounting ring 301. When installing the metal sleeve 3, the metal sleeve 3 can be set inside the middle die hole 2, and then the mounting ring 301 fits the groove, and finally the mounting ring 301 is fixed by a detachable fastener; at the same time, since the mounting ring 301 of this embodiment does not need to bear a large radial force, the installation does not need to be very firm, so as to facilitate subsequent disassembly. At the same time, in this embodiment, the outer wall of the metal sleeve 3 and the inner wall of the middle die hole 2 are fit, which can not only extend the life of the metal sleeve 3, but also enable the powder or granules to be better formed inside the metal sleeve 3.

[0019] In some cases, when the tablets after molding have strong adhesion or the tablet press pressure is insufficient, tablet breakage may occur when the tablets are separated. In order to reduce this effect, the inventors have found after a large number of experiments that when a plurality of small holes 302 are provided on the side wall of the metal sleeve 3, the breakage rate of the tablets can be reduced. The presence of the small holes 302 reduces the adhesion between the tablets and the side wall of the metal sleeve 3. At the same time, although the outer wall of the metal sleeve 302 and the inner wall of the middle die hole 2 are in contact, there is still a certain gap between the two. When the punching head applies pressure to the powder or granules, the gas between the powder or granules can be discharged more easily through these gaps, thereby making the distance between the powder or granules closer, so that the strength of the tablet is relatively higher.

[0020] During the actual use of the tablet press, the inventor found that due to working under higher pressure conditions, the temperature of the tablets finally obtained is relatively high. If the tablet press works for a long time, the temperature of the turntable body 1 and the punch head will rise, causing the temperature of the tablets to rise further. In the prior art, some materials, especially medicines, are more sensitive to temperature. Under higher temperature conditions, they will be partially inactivated or even completely inactivated, resulting in a decrease in drug efficacy. For this reason, the inventor has provided a corresponding liquid flow channel 5 inside the turntable body 1, and a connector 4 having one end connected to the liquid flow channel 5 is provided on the side wall of the turntable body 1. The other end of the connector 4 is connected to a cold source, and the turntable body 1 can be cooled by the cold source. For the cold source, conventional cooling water, cold air, etc. can be provided. In order to promote its circulation, a corresponding circulation device, such as a circulating pump, etc., is also provided.

[0021] In particular, the liquid flow channel 4 provided above usually only reduces the temperature of the turntable body 1 on a large scale, and then reduces the temperature of the tablets by heat conduction. In order to accelerate the temperature drop of the tablets, in this embodiment, at least one circle of liquid flow channel 4 is provided outside any middle die hole 2. This circle of liquid flow channel 4 is provided in a ring shape around the middle die hole 2, and the distance from the middle die hole 2 is set to 3 to 10 mm. In this case, the strength of the side wall of the middle die hole 2 is not affected, and the tablets inside the metal sleeve 3 can be quickly cooled.

[0022] The metal sleeve 3 needs to be made of a material with high thermal conductivity and high strength, such as common stainless steel, high-strength copper alloy, etc.

[0023] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A turntable for a tablet press, characterized in that: It includes a turntable body, which is provided with a plurality of middle mold holes penetrating the turntable body, a metal sleeve is detachably provided in the middle mold hole, a liquid flow channel is provided inside the turntable body, and a connector is provided on the outer wall of the turntable body, one end of the connector is connected to the liquid flow channel, and the other end is connected to a cold source.

2. The turntable according to claim 1, characterized in that: An annular mounting ring is provided at one end of the metal sleeve, and the metal sleeve is detachably arranged inside the middle mold hole through the mounting ring.

3. The turntable according to claim 1, characterized in that: The outer wall of the metal sleeve is in contact with the inner wall of the middle die hole.

4. The turntable according to claim 1, characterized in that: The side wall of the metal sleeve is provided with small holes.

5. The turntable according to claim 1, characterized in that: The outside of any of the middle mold holes is provided with at least one circle of liquid flow channel.

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