JPH0114787B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a polishing agent dispersing device, and in particular, when polishing tablets such as dragee-coated tablets and film tablets with a powder polishing agent, the powder polishing agent can be uniformly sprinkled on the tablets. Therefore, the present invention relates to a polishing agent dispersing device that can polish tablets very effectively. Coated tablets such as sugar-coated tablets and film tablets lack luster and do not slip unless they are polished, causing problems in the subsequent sorting process, printing process, and even packaging process. Therefore, polishing is an important process that cannot be removed. Conventional methods for polishing tablets include a method in which a polishing agent such as wax is dissolved in an organic medium. However, since this method uses an organic solvent, it is unfavorable from a safety and health perspective, so in recent years, many methods have been used to perform polishing using powdered polishing agents (for example, JP-A-Sho). (See Publication No. 53-52618). In the polishing method using powder polishing agent,
It is common for an operator to perform the polishing process by manually scattering an appropriate amount of powder polishing agent directly onto the tablets. However, in this case, depending on the method of dispersing the polishing agent, it may be good or bad. In the case of poor quality, a lump of polishing agent may appear on the tablet surface, or the polishing agent may enter the stamp on a film-coated film tablet, causing the stamp to disappear, resulting in loss of product value. disappears. Regarding sugar-coated tablets, if a clump of polishing agent such as wax forms on the sugar-coated surface, when the code number is printed in the subsequent printing process, the wax may be transferred to the design roll and cause clogging of the design. be. Therefore, once the design becomes clogged, many printing defects will occur afterwards.
In particular, if clogging occurs at the beginning of printing, all subsequent tablets will be defective, which is a big problem. Therefore, it is necessary to avoid the formation of agglomerates of the polishing agent on sugar-coated tablets even in one tablet. Another method of spraying powdered polish is to put it in a cloth bag and spray it.
If the mesh of the cloth is large, it can be sprayed quickly, but as with the direct spraying described above, there is a drawback that the polishing agent clumps on the tablet, and if the mesh of the cloth is small, the polishing agent does not come out easily. It takes time. An object of the present invention is to solve the above-mentioned problems in dispersing conventional powder polishing agents, and to be able to uniformly spread powder polishing agents on tablets, thereby preventing the formation of lumps of polishing agents on tablets. It is an object of the present invention to provide a polishing agent spraying device that can quickly spray the polishing agent. a container for storing a powder polish, a diaphragm opening provided at the tip of the container, a filter having a mesh size of 20 to 200 meshes provided in the diaphragm opening, and a powder glaze in the container; It has a force-feeding means for ejecting the agent from the aperture through the filter toward the tablets using pressurized air, and the area ratio of the aperture to the cross-sectional area of the container is from 1/10000 to 1/2.7. A polishing agent dispersion device having the following features is provided. In the polishing agent spraying device of the present invention, the filter preferably has a mesh size of about 20 to 200 meshes. If the mesh of the filter mesh becomes smaller than this, it will be difficult for the powder polishing agent to come out of the aperture, and if the mesh of the filter mesh becomes larger than this, the filter will not have a sufficient sieving effect and the tablets will not be able to pass through the tablets. There is a risk of creating a lump of powdered polish on top. Further, in the polishing agent dispersing device described above, it is preferable that the area ratio of the aperture opening to the cross-sectional area of the container is about 1/10000 to 1/2.7. If the area ratio is smaller than this, it will be difficult for the powder polishing agent to come out from the aperture opening, and if the area ratio is larger than this, the ejection force of the pressurized air will be weaker, and the powder polishing agent will not be sufficiently atomized. I can't do that. The area ratio of the aperture opening to the cross-sectional area of the container is approximately 1/204
It is more preferable that the ratio is from 1/39 to 1/39, and in this range, the best powder mist of the powder polishing agent can be obtained. In the spraying device of the present invention, for example, carnauba wax alone, a mixture of carnauba wax and talc, a mixture of carnauba wax and magnesium stearate, or a mixture of carnauba wax, talc, and stearic acid can be used as the polishing agent. It is also possible to use any other polishing agent that can be turned into a powder at room temperature. Note that in this specification, "powder mist" means dispersing fine powder particles in a mist form. DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the tablet polishing agent dispersing device of the present invention will be described below with reference to the drawings. In FIG. 1, the entire polishing agent dispersing device is designated by the reference numeral 2, and the dispersing device 2 has a cylindrical container 4 for containing the powder polishing agent. A diaphragm aperture 6 is provided, the diaphragm aperture 6
As shown in FIG. 2, a filter 8 with a relatively fine mesh is provided. The dispensing device 2 also has a pumping means 10 for spraying the powder polishing agent in the container 4 with pressurized air through the filter 8 and from the throttle opening 6; in the illustrated embodiment, the pumping means 10 is a cylinder. The piston device is a piston device that reciprocates within a shaped container 4, and this piston device is manually operated by a worker using a rod 20. To use this dispersion device 2, first, the pressure feeding means, ie, the piston device 10, is removed from the cylindrical container 4, a suitable amount of powder polishing agent is put into the container 4, and the air inside the container is compressed by the piston device 10. As a result, the air in the container 4 is blown out through the diaphragm opening 6, and the powder polishing agent is also blown out through the diaphragm opening 6 through the filter 8. Therefore, the powder polishing agent sieved by the filter 8 is sufficiently atomized and evenly spread over the tablets. Therefore, it is possible to prevent the polishing agent from forming a lump on the tablet. The cylindrical container 4 of the spraying device 2 can be constructed of two halves 16 and 18 that are integrally engaged with each other by screws 12 and 14, as shown in FIG. By doing so, it is possible to prevent the piston 10 from being damaged early due to removing and inserting the piston device 10 from the container each time the powder polishing agent is put into the container 4. Further, in the illustrated embodiment, the piston device 10 is a manual type that is operated by hand using the rod 20, but the piston device 10 is not limited to a manual type and can be operated by connecting the rod 20 to an appropriate drive source. It is also possible to perform this by mechanical force or the like. Further, in the illustrated embodiment, the pressure feeding means 10 is a piston device, but the present invention is not limited to this, and the container 4 is connected to a pressurized air source via a conduit, and pressurized air is sent to the container 4 by operating a valve. It is also possible to eject the powder polish in 4 from the aperture opening 6. As a result of experiments, it has been found that the mesh size of the filter 8 provided in the diaphragm opening 6 in the spraying device 2 is preferably in the range of about 20 to 200 meshes. If the mesh of the filter becomes smaller than this, it will be difficult for the powder polishing agent to come out, and if it becomes larger than this, the powder polishing agent will not be able to pass through the sieve sufficiently, and there is a risk that the polishing agent will clump on the tablet. comes out. In addition, in order to obtain a sufficient jetting action by the throttle opening 6, the area A of the throttle opening 6 must be equal to the cross-sectional area B of the container 4.
It has been found that it is preferable for the area ratio to be within a predetermined range. Table 1 below shows the results of experiments conducted regarding this point. In this experiment, the inner diameter of the container 4 was kept constant at 100 mm, and the hole diameter of the aperture opening 6 was varied. I saw the condition. The mesh of the filter 8 used was 100 mesh.

【table】

[Table] As you can see from Table 1 above, the area ratio A/B is 1/2
The best atomization of the powder polish was obtained within the range of 0.04 to 1/39. In the range where the specific volume ratio A/B is 1/204 or less, usable powder atomization was obtained up to an area ratio of 1/10000, but when the area ratio becomes smaller than that, the powder polishing agent does not come out well. Although it was not suitable for practical use, in the range where the area ratio A/B is larger than 1/39,
Almost usable powder atomization was obtained up to an area ratio of 1/2.7. When the area ratio was larger than that, the jetting force became smaller and sufficient atomization could not be obtained. Next, an embodiment of the polishing method of the present invention using the polishing agent dispersing device described above will be described. Example 1 While a film tablet was placed in a coating pot and rotated, carnauba wax was put into the spraying device of the present invention and sprayed onto the film tablet to polish it. The spraying device used had a filter with a mesh size of 200 mesh and an area ratio of the aperture opening to the cross-sectional area of the container of 1/51. Film tablets are 100mg/tablet film tablets with a code number stamped on a bare tablet and then coated with a film.The surface is uneven because of the code number stamped. For comparison, the same film tablet was placed in a coating pot or a polishing pot, and while rotating it, carnauba wax powder was poured into a roughly 15 mesh bag.
By sprinkling it onto a film tablet, it was polished using a conventional polishing method. The results of experiments using the above-described polishing method of the present invention and the conventional polishing method were as shown in Table 2 below.

[Table] In the above experiment, carnauba wax was 800
mg/1Kg of film tablet was used. As can be seen from Table 2 above, with the conventional polishing method, 0.05 to 0.1% of defective tablets with code numbers embedded in the film tablets with a large amount of carnauba wax adhering to the irregularities were discovered at the time of sorting. According to the dispensing method, not a single defective tablet was found during sorting, proving the effectiveness of the method. Example 2 The experimental method was the same as in Example 1. However, the film tablet used in this example was a film tablet in which a bare tablet without a code number was coated with a film. Film tablets are 220mg/tablet. Carnauba wax is 500mg/film tablet 1Kg
It was used. The results obtained were as shown in Table 3 below.

[Table] As can be seen from Table 3, in the conventional polishing method, 0.02% to 0.05% of defective tablets with a large amount of carnauba wax adhering to the surface of the film tablet were found during sorting, but the polishing method of the present invention According to , such defective tablets were not found during sorting, and it was found that the effect was as great as in Example 1. Example 3 The experimental method was the same as in Example 1. However, sugar-coated tablets were used in this example. Sugar-coated tablets are 310 mg/tablet. Carnauba wax was used at 400 mg/1 kg of sugar-coated tablets. The results obtained were as shown in Table 4 below.

[Table] As can be seen from Table 4, with the conventional glazing method, 0.01% to 0.02% of defective tablets with a large amount of carnauba wax adhering to the surface of sugar-coated tablets were found during sorting, but with the glazing method of the present invention, No such defective tablets were found during sorting, and it was confirmed that the tablets were as effective as the previous examples. As is clear from the above, according to the present invention, the powder polishing agent is pressurized using a polishing agent dispersing device which has a constriction opening at the tip of the container and a relatively fine mesh filter in the constriction opening. The powder polishing agent is applied to the tablets by blowing air through the filter and from the aperture opening to polish the tablets, so that the powder polishing agent is sufficiently atomized and sprayed onto the tablets. The effect of this is that the polishing agent can be uniformly distributed over the tablets, thereby preventing the polishing agent from forming lumps on the tablets, and that the polishing agent can be quickly distributed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a polishing agent dispersing device used in the tablet polishing method of the present invention, and FIG. 2 is an enlarged view of the tip of the dispersing device shown in FIG. FIG. 3 is a perspective view similar to FIG. 1, showing an embodiment in which the container of the spraying device shown in FIG. 1 is divided into two parts. Code 2 in the figure: Spraying device, 4: Cylindrical container,
6... Throttle opening, 8... Filter, 10... Piston device (pressure feeding device), 12, 14... Screw, 1
6, 18...Half part of the container, 20...Rotsudo.

Claims (1)

[Scope of Claims] 1. A container containing a powder polishing agent, a diaphragm opening provided at the tip of the container, a filter having a mesh size of 20 meshes to 200 meshes provided in the diaphragm opening, and the The container has a force-feeding means for squirting the powder polishing agent inside the container through the filter and from the aperture toward the tablets by pressurized air, and the area ratio of the aperture to the cross-sectional area of the container is from 1/10000 to 1/10000. A polishing agent dispersing device characterized by being 1/2.7. 2. The polishing agent spraying device according to claim 1, wherein the area ratio of the aperture opening to the cross-sectional area of the container is 1/204 to 1/39. 3. The polishing agent dispersing device according to claim 1, wherein the container is a cylindrical container, and the pressure feeding means is a piston device that reciprocates within the cylindrical container. 4. The polishing agent dispersing device according to claim 3, wherein the cylindrical container is composed of two integral parts that are screwed into each other.