JPS63130298A - Feed shoe for tablet making machine - Google Patents

Abstract

PURPOSE:To simply perform the regulation of a granule and to increase the working efficiency by providing the flow regulating means capable of optionally regulating the flow of a granule with a manual operation at the flow regulating part. CONSTITUTION:A knurling tool knob 27e is arranged in the recessed plate formed on a feed shoe main body. When the knob 27e is rotated,the screwed rod 27g screwed therein is moved in the axial direction, moving a flow regulating plate 27a linearly in the direction crossing the hole 26b of a weir member 26. With the movement of the flow regulating plate 27a the degree of the alignment of the holes 27b and 27b are varied and the size of the hole 40 for regulating the flow optionally varied. The flow of a granule can thus be optionally regulated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a feed shoe for powder and granular material used in a tablet machine for compressing tablets.
The tablet press is placed on two rotary disks with a gap between them, and is fed from a hopper by a drop onto the rotary disk of the tablet press.By collecting a certain amount of powder material, which is the tablet material, on the rotary disk, the powder is compressed. This invention relates to a feed shoe for a feed If9+ that uniformly fills granules into a mortar set on a rotary disk.

Furthermore, in order to uniformly fill the granules into the mortar set on the rotary disk of the tablet press, an accessory to the tablet press called a granule feeder is generally used. However, this powder feeder has an open type feed shoe that performs natural filling by collecting a certain amount of powder and granules that flow through the rotation of a rotary disk, and a feed shoe that performs natural filling by collecting a certain amount of powder and granules that flow through the rotation of a rotating disk. There is a closed-type forced filling device that forcibly fills powder or granular material, and the present invention relates to the former open-type feed shoe.

(Prior Art) It is known that hormonal agents, antihypertensive agents, sleep sedatives, psychoactive agents, and the like exhibit their pharmacological activity when ti<@i. Therefore, it is desirable and required that tablets administered to patients always have a constant weight.

The punching machine for compressing these tablets generally consists of a ring-shaped rotary disk in which a large number of tablet-forming dies are arranged in a circumferential manner, and a ring-shaped rotary disk arranged coaxially with this rotary disk. It has an upper punch and a lower punch that are positioned on the upper and lower tracks to align with each day's mortar hole on the rotary disk and rotate in synchronization with the rotary disk, and the upper punch has a lower end with a striking surface only when forming tablets. The upper part of the lower punch is inserted into the mortar hole, and the upper end of the lower punch, which has a striking surface, always stays in the mortar hole. The above-mentioned feed shoe to which the present invention relates is such that the lower end portion of the upper punch is not inserted into the mortar between the rotary disk and the upper punch in such a two-stroke machine.
It is installed on a rotating disk with a gap left.

In addition, the height of the lower mallet track at this point can be adjusted by operating the handle, and by such adjustment,
The amount of powder to be filled into the mortar within the feed shoe is arbitrarily adjusted.

A hopper is attached to the feed shoe, and when the powder is fed from this hopper onto the rotary disk by a drop,
The powder is filled into the mortar by the action of the feed shoe, and when it passes through the compression roller, the upper and lower punches move toward each other, compressing and molding the powder in the mortar. Take the form of tablets. The tablets are ejected through a take-out damper and a sprayer.

Conventionally, the feed shoe used in such a tablet press has a hole 82 in the feed shoe body 1, as shown in FIG.
#t! A powder flow path 2 is formed in an arc shape coaxially with the rotary disk 1, and this flow path 2 has a flow rate adjusting portion 3, a damming portion t1, and a worn portion 5 for flowing the powder particles indicated by the arrow T. They are provided in this order in the flow direction of the body (rotation direction of the rotary disk). The flow rate adjustment part 3 is 7 in the flow direction of the powder and granular material.
Consisting of a plurality of weir members 3a, 3b, and 3c curved in the shape of a letter, each weir member has a semicircular hole 3d for flow rate adjustment in the center of the bottom that gradually becomes smaller in the flow direction T of the powder and granules;
3e and 3f are formed. The damming portion 4 similarly has a plurality of weir members 4a and 4b curved in a V-shape in the flow direction T of the powder and granules, and no hole through which the powder passes is formed in the weir members. The frayed portion 5 is provided with a frayed plate 5b that is pressed downward by a spring 5a.

An arc-shaped groove ib is cut on the bottom surface of the outer peripheral part 1a of the feed shoe body 1, and a gap adjusting member 6 made of felt is fitted into the width of the groove to prevent powder particles from scattering outward due to centrifugal force.

The outer circumferential portion 1a of the feed shoe body 1 is provided with attachment portions 1c, 1d, and 1e for attaching the feed shoe to the table for attaching the tablet press, and a hopper attachment is provided at the most upstream portion of the attachment portions 1c, 1d, and 1e. A stand 7 is attached to the base.

When in use, the feed shoe body 1 is attached to parts 1c and 1.
d and 1e are attached to the tablet press by screwing them to the stand so that they are installed with a gap left on the rotary disk of the tablet press. This gap is, for example, 1.0 to 1.5 mm. The reason for leaving such a gap is that the feed shoe body 1 is made of gunmetal and the rotary disk is made of steel, so when they come into contact, the rotation of the rotary disk causes friction and generates metal powder, which becomes powder particles. This is because it gets mixed into the body. A predetermined gap is formed between the bottoms of the weir members 3a, 3b, 3c and the bottoms of the weir members 4a, 4b with the rotary disk. Worn board 5
b and the gap yI adjustment member 6 is in contact with the rotary disk.

The powder and granules supplied from the hopper onto the rotary disk in the feed shoe due to the drop flow in the direction of arrow T through the flow rate adjustment portion 3 to the damming portion 4 due to the rotation of the rotary disk.
During this time, it is filled into a mortar set on a rotating disk. Powder that does not pass through the gap between the weir members 4a, 4b and the rotary disk without entering the mortar is scraped off by the cutting plate 5b one by one and along the guide plate attached to the inner circumferential side of the rotary disk. Then, it goes around the rotating disk once again and is returned to the feed shoe.

FIG. 7 shows a feed shoe that has been improved from the feed shoe shown in FIG. 6 to make it easier to adjust the flow rate in the flow adjustment section. The same members as those shown in FIG. It is attached. The flow regulating portion of this feed shoe is designated by the reference numeral 8, and this flow regulating portion 8 has more weir members 8a, 8b, 8c, 8d than those in FIG.
, 8e, 8f, and these weir members have semicircular holes 8g, 8h, 81.8j, 8 for flow rate adjustment in the same way.
k, 81 is drilled, hole 81 in the storage part 'N8b],
In front of the hole 8 of the weir member 8e and in front of the hole 81 of the weir member 8f, a manually operated flow straightening plate 9.10.11 is installed. Flow rate adjustment plates 9, 11. The flow adjustment plate 11 is rotated in the direction of arrow R, and the fixing screw 9a is rotated linearly in the direction of arrow M.
, 10a, and 11a, it is fixed at a desired position. By attaching such a flow rate adjusting plate, flexibility is provided so that an appropriate flow rate A can be adjusted even if the characteristics such as the particle size of the powder or granules change.

(Problem to be Solved by the Invention) Needless to say, the important function of the feed shoe is to minimize the variation in weight and thickness of the tablets compressed by the tablet machine. The purpose is to uniformly fill powder and granules into a mortar set on a rotary disk, and in order to do so, it is necessary to keep a certain amount of powder and granules always in the chamber in front of the dam member in the dam part. It is.

However, in all of the conventional feed shoes mentioned above, the flow rate adjustment in the flow rate adjustment part is not necessarily sufficient, or it is extremely difficult to adjust the flow rate, and it is difficult to stop a certain amount of powder and granular material in the damming part. It took a long time to adjust the flow rate.

That is, in the feed shoe shown in FIG. 6 without a flow rate adjustment plate, the weir member 3a in the flow rate adjustment portion 3,
The sizes of the holes 3d, 3e, and 3f for adjusting the flow rate of 3b and 3c become smaller in sequence toward the flow direction T of the powder and granule, but the size of these holes is different from the size of the holes 3d, 3e, and 3f for adjusting the flow rate when granules are used as the powder or granule. If it is, it is generally too large, and if left as is, many granules will flow and overflow from the dam area, spilling outside. Therefore, in order to avoid such a situation, a material such as tape was attached to the hole to adjust the size of the hole.

Furthermore, since the gaps between the dam members 4a and 4b of the dam portion 4 and the rotary disk are constant, the gaps had to be adjusted by pasting sheet materials. Furthermore, in this conventional feed shoe, the gap between the inner bottom surface of the feed shoe body 1 and the rotary disk was left as is, so there was a stepped body part that passed through this gap, which made it even more difficult to adjust the flow rate. Therefore, we had to attach a sheet material to the bottom of the nameko.

Furthermore, even in the feed shoe equipped with a flow rate adjusting plate shown in FIG. 7, it has been found that the structure of the adjusting plate itself is unreasonable, making it difficult to adjust the flow rate.

This is because the adjustment plate itself has a structure with many gaps, and the flow rate of the weir member - JV5. It is installed at a distance from the hole for
This is because the adjustment plate adjusts the flow rate by making the flow path of the powder easier or wider, so it is difficult to adjust the flow rate as desired even by operating the adjustment plate. .

Therefore, even with this feed shoe equipped with a flow rate adjustment plate,
In the end, the flow rate had to be adjusted by attaching sheet materials to the holes 8g to 81 for flow rate adjustment, the bottoms of the dam members 4a and 4b of the damming part 4, and the bottom of the inner peripheral part of the feed shoe body. Ta.

In this way, with conventional feed shoes, in order to obtain the desired flow rate, it is necessary to attach a sheet material.
This work will help you! Adjustments require considerable skill, and the sheet material must be reattached many times depending on the characteristics of the product, particle size, etc., which requires a great deal of effort. As a result, the adjustment time took nearly 20 minutes.

Furthermore, in the method of pasting sheet material to adjust the flow rate,
The sheet material may be peeled off during the tableting process, and in this case, the weight of the compressed tablets fluctuates, resulting in the production of defective tablets.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a feed shoe for TFI that eliminates the above-mentioned drawbacks of the prior art and allows easy and accurate adjustment of the flow rate of powder and granular material.

(Means for Solving the Problems) According to the present invention, in order to achieve the above object, the powder flow path formed in the feed shoe body has a flow rate adjustment portion and a damming portion, and A feed shoe for a tablet press in which the supplied powder is filled into a mortar set on a rotary disk while the supplied powder flows through a flow rate adjustment section and a damming section due to the rotation of a rotary disk. In the present invention, there is provided a feed shoe characterized in that a flow rate adjusting section is provided with a flow rate adjusting means that can arbitrarily adjust the flow rate of powder or granular material by manual operation.

(Example) Preferred embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the feed shoe of the present invention is generally designated by the reference numeral 20, and the feed shoe body 21 of the feed shoe 20 has an arcuate shape coaxially with the rotary disk K (see FIG. 2) of the tablet press. A granule flow path 22 is formed in the granule flow path 22 . This flow path 22 includes a flow rate adjusting portion 23 and a damming portion 24.
, and the frayed portions 25 are provided in this order in the flow direction T of the powder or granular material (rotation direction of the rotary disk).

The flow rate adjustment section 23 is provided with three flow rate adjustment means that can arbitrarily adjust the flow rate of the powder or granular material by manual operation. In the illustrated embodiment, the three flow rate adjustment means are comprised of flow rate adjustment holes 40 whose size D (see FIG. 2) can be arbitrarily changed by manual operation. Reference numeral 10 denotes a hole 26b formed in a weir member 26 attached to the powder flow path 22 of the feed shoe body 21, and a flow rate adjusting plate 27a movable with respect to the weir member.
The hole 27b is formed in the hole 27b.

More specifically, the front surface 26a of the weir member 26 is curved in a V-shape toward the flow direction T of the powder and granules, and a semicircular hole 26b is formed at the bottom.

As can be clearly seen from FIG. 2, the position of the hole 26b is determined by the rotation plate K
It is selected so that it is located at the position of the hole H of the mortar U set in .

At the rear of the weir member 26, as shown in cross section in FIGS. 3 and 4, a ridge 26C is formed in the direction A across the hole 26, and a flow rate adjustment plate 27a is movable in the direction A within the ridge 26C. is inserted into. A hole 26 is provided at the bottom of the flow rate adjustment plate 27a.
Similarly, a semicircular hole 27b is drilled at a position that can be aligned with the hole 27b.

A long and narrow guide groove 27c is cut in the center of the flow rate adjustment plate 27a, and a guide pin 27d screwed into the weir member 26 is inserted into this guide groove 27c to stabilize the movement of the flow rate X adjustment plate 27a. It is now possible to do so.

The flow rate adjustment plate 27a is a knurled knob 2 that is manually operated.
7e through a screw mechanism that converts the rotation into linear movement of the meteor adjusting plate 27a. That is, a screw hole 27f is drilled in the center of the knob 27e, one end of the threaded rod 27g is screwed into the screw hole 27f, and the other end of the threaded rod 27g is fixedly attached to the flow rate adjusting plate 27a. installed.

The knurling knob 27e is disposed in a recess 27h formed in the feed shoe body 21, and is integrally provided with a support portion 27j provided with an annular recess 27i on the negative side thereof. Shoe body 21
The receiver, which is a part of the holder, is rotatably supported by the stand 27k. As a result, when the knurled knob 27e is rotated,
The threaded rod 27g that is threadedly fitted therein moves in its axial direction, causing the flow rate adjusting plate 27a to move linearly in the direction A across the hole 26b of the weir member 26.

By such movement of the meteor adjustment plate 27a, the degree of alignment between the holes 26b and 27b changes, and the flow adjustment hole 40
The size of the powder can be arbitrarily changed, for example, from 3.5 mm to 10.0 mm. Therefore, the flow rate of the powder or granular material can be adjusted arbitrarily.

On the outer periphery of the support member 27j of the knurled knob 27e, grooves 271 are cut at appropriate intervals in the circumferential direction.
271 is engaged with the tip of a pawl 27m screwed to the feed shoe body 21, and the groove 27 and the pawl 27m create a Clix I knob mechanism that rotates the knurling knob 27e by a predetermined amount. is obtained. This click stop mechanism allows the once set size of the flow rate adjustment hole 40 to be stably maintained.

Further, the flow rate adjustment plate 27a is provided with a flow rate gauge that indicates the size of the hole 40 for flow rate adjustment, and therefore the meteor of the powder or granular material. That is, a pointer 27n that moves together with the threaded rod 27g is attached to the threaded rod 27g.
The tip of the feed shoe body 21 is located under a transparent scale plate 27p screwed to the feed shoe body 21, and is adapted to indicate the scale. With such a flow rate gauge, the size of the hole 40 for flow rate adjustment can be adjusted without having to take the trouble to look at it, and the size of the hole 40 once set can be adjusted.
When you later want to obtain the same size as 0, you can quickly set the size.

On the front surface 26a of the weir member 26, there are gap adjustment plates 28a on both sides of the hole 26b to minimize the gap between the weir member 26 and the rotary disk.
, 28b are provided. That is, gap adjustment plate 28
a and 28b have elongated holes 28c and 28d, and are screwed to the weir member 26 through these elongated holes so as to be adjustable in the vertical direction.

When the feed shoe is installed on the rotating ff1K, a gap of about 1.0 to 1.5 mm will be created between it and the feed shoe, and a similar gap will be created between the rotary disk and the weir member 26, but this gap adjustment This gap can be minimized by the plate, thereby preventing the powder from passing through the holes 26b in the front surface 26a.
This prevents the fluid from flowing downstream through the gap, allowing for more accurate flow rate adjustment.

The weir member 26 is detachably attached to the feed shoe body 21 with a screw 26d. This simplifies the manufacture and assembly of the flow rate adjusting portion 23, and also facilitates its maintenance, inspection and cleaning.

The damming part 24 is provided with a gap adjusting means 41 for adjusting the gap with the rotary disk of the tablet press in accordance with the characteristics such as the particle size of the powder or granule. In the illustrated embodiment, this gap adjusting means 4
1 is constituted by a storage part N29 attached to the powder flow path 22 of the feed shoe main body 21, and a dam W:, 30 attached to this weir member so as to be adjustable in the vertical direction.

The two weir members are curved in a V-shape toward the flow direction T of the powder and granular material, and as shown in FIG.
The bottom part is located higher than the bottom surface of the feed shoe main body 21, and a gap larger than the gap between the bottom surface of the feed shoe main body 21 is formed between the rotary plate of the striker 92@. The dam plate 30 is housed in front of the two dam members. A long hole 30a is formed in the dam plate 30, and by screwing it to the dam member 29 through this long hole, it can be freely adjusted in the vertical direction. , it is now possible to easily make adjustments to stop a certain amount of powder or granular material.

Like the weir member 26, the two weir members are removably attached to the feed shoe body 21 with screws 29a, so that maintenance and inspection can be easily performed.

The frayed portion 25 has a frayed plate 31 attached to the feed shoe body 21, and the frayed plate 31 has a spring 32.
is pressed downward to maintain appropriate contact with the rotary disk.

An arcuate groove 21b is cut in the bottom surface of the outer peripheral part 21a of the feed shoe body 21 along the flow path 22, and a groove 21b is cut into the groove 21b to prevent the powder from scattering outward due to centrifugal force. 12
A gap adjustment member 33 made of FEL I is fitted to minimize the gap between the rotary disk of the machine and the rotary disk of the machine. A gap adjustment member 34 is provided on the bottom surface of the inner peripheral portion 21c of the feed shoe body 21 in an arc shape along the flow path 22 to minimize the gap between the feed shoe body 21 and the rotary disk of the tablet press. In the illustrated embodiment, the gap adjustment member 34 is a cloth attached to the bottom surface of the inner peripheral portion 21c.

As with the gap adjustment member 33 on the outer circumference of the slat, a groove may be cut and a gap adjustment member made of felt may be fitted therein. Conversely, the gap adjusting member 33 on the outer periphery can also be made of cloth. In this way, by minimizing the gap between the bottom surface of the inner circumference 21c of the feed shoe body 21 and the rotary plate T using the gap adjustment member 34, it is possible to eliminate the part of the powder that flows out from this gap, and the flow rate. You can make fine adjustments.

The outer peripheral part 21a of the feed shoe body 21 is provided with holes 21d, 21e, and 21f for mounting the feed shoe body on a table for mounting the tablet press, and the most upstream part thereof is for mounting a hopper. The base 35 is fixed with screws.

In use, the feed shoe 20 is installed in a tablet press in a conventional manner. That is, the feed shoe body 2
The inner peripheral part 21c of 1 is directed toward the center of the rotary disk, and the flow path 22
Position the feed shoe so that its center is above the mortar hole H of the rotary disk 'r, and leave a slight gap between the bottom of the feed shoe main body 21 and the rotary disk T.
Insert screws into holes d, 21e, and 21f and tighten to secure.

Next, the hopper is attached to the stand 35.

The powder and granules supplied into the feed shoe by the drop from the hopper ride on the rotary disk, and flow along the arrows B and C in the flow path 22 due to the rotation of the rotary disk. The hole H of the set mortar U is filled.

As described above, in order to uniformly fill the 8 holes H with powder and granules, a certain amount of powder and granules must always be accumulated in front of the dam portion 24. According to the feed shoe of the present invention, this can be achieved by turning the knurled knob 27e in the flow rate adjustment portion 23 to open the flow rate adjustment hole 40.
This can be easily achieved by changing the size of the powder and arbitrarily adjusting the flow rate of the powder or granular material. In particular, in the illustrated embodiment, gap adjustment plates 27a and 27b are provided on both sides of the hole 26b in the front surface 26a of the weir member 26 to minimize the gap between the rotary disk and the rotary disk, making it easier to adjust the flow rate. . −
For example, the flow rate could be adjusted in about 3 minutes.

In addition, in the illustrated embodiment, the size of the flow rate adjustment hole 10 can be seen using the flow rate gauges 27n and 27p.
Extremely easy to operate. In addition, in the illustrated embodiment, the dam plate 30 is made vertically movable in the dam part 24 so that the gap between it and the rotary disk can be adjusted, so that even if powder and granules with different characteristics such as particle size ml of powder and granular material can be easily stored.

Furthermore, in the illustrated embodiment, the gap adjustment member 34 that minimizes the gap with the rotation ff1K is provided not only on the outer circumference 21a of the feed shoe main body 21 but also on the inner circumference 21c. The granules no longer flow out, and the damming part 24 is removed from the part other than the hole 40 for adjusting the flow rate.
Intrusion of powder or granules before zero is also prevented, and adjustment to dam up a certain amount of powder or granules can be easily performed by -71.

Next, a bare tablet is compressed using the feed shoe of the present invention,
An experimental example in which the properties of the naked tablets were measured is shown below.

Experiment 1 (1) Tablet press used Two-stage compression type 75-speed tablet press [(
Kikusui Seisakusho Co., Ltd.], number of punches: 36 (2) Powder granules used, passed JIS16 mesh, apparent specific gravity 0.700, pulverization rate 32.0%, water content 3.1%, preparation Amount: 80Kg (3) Tablet machine rotation speed: 35r, p, m, , 40r,
p, m, and 45r, p, m.

(4) Measuring instruments used Heavy electric measurement - Torsion Hallance (measuring range 1 - 1000 mg possible), thickness measurement - Micrometer [manufactured by Mitoyo Seisakusho Co., Ltd., measuring range 17'100 - 25 mm
Possible] (5) Vi tablet standard value weight ff1160±8mg
(JP weight deviation test 2092), thickness 3.8±0.1m
m (average value of 20 tablets), diameter 8.0 mm, R (radius of curvature of the punching surface) 6 mm (6) Results As a result of measuring the compressed bare tablets, the values shown in Table 1 were obtained.

Note that this value is the average value of the sampling number of 1ooa.

As can be seen from Table 1, the rotation speed of the tablet press was varied in three stages, and in all cases, both the weight and thickness were within the standard values for the plain tablets. In terms of standard deviation values, the tablets compressed using the conventional feed shoe without a flow rate adjusting plate shown in Fig. 6 have an average weight of 20 ronts and a weight of 1.
Since the thickness was 35 mg and 0.0175 mm, it was found that the variation was smaller than when a conventional feed shoe was used.

(1) Tablet press used Same as Experiment 1 (2) Powder used Granules, passed JIS16 mesh, apparent specific gravity 0.620, pulverization rate 44%, moisture content 3.2%, Charged amount 0 kg (3) Tablet press rotation speed Same as Experiment 1 (4) 4 measuring devices used Same as Experiment 1 (5) Bare standard value Weight 100 ± 5 mg (JP weight deviation test 20, thickness 3.0 ±0.1 mm (average value of 20 tablets), diameter 6.5 mm, R is 2-stage R (6) Results The values shown in Table 2 were obtained as a result of measuring the compressed bare tablets.The number of samples was also 100. , and the average was taken.

As can be seen from Table 2, the weight is light at 100 mg/tablet, and the particle size of the granules is smaller than those used in Experiment 1, but even if the rotation speed of the tablet press is changed, both the weight and thickness remain unchanged. However, the standard value of IR! , it was surrounded. Standard a (in terms of difference values, the one using the conventional feed shoe shown in Fig. 6 has an average weight of 1.5 mg at 20 ron h, and a thickness of 0.
．． 0210 mm, it was found that the variation was smaller in relation to the specific gravity.

(1) Tablet press used Same as Experiment 1 (2) Powder used Granules, passed JIS24 mesh, specific gravity 0.550, pulverization rate 56%, water content 3.
2%, charge amount 0Kg (3) Tablet machine rotation speed Same as Experiment 1 (4) Measuring device used Same as Experiment 1 (5) Bare tablet standard value Weight ff 150 ± 3.75 mg (
JP weight: tiQ difference test 20 tablets), thickness 2°8 ± 0.1m
m (2OR average value), diameter 5.0 mm, R3, 5 mm (6) Results As a result of measuring the compressed bare tablets, the values shown in Table 3 were obtained. Average number of samples: 100 tablets.

As can be seen from this table, the particle size of the granules was fine, passing through a 24-mensie mesh, the weight of the tablets was 50rng/tablet, and the diameter was 5.0mm, which was small.
Even when the number of revolutions was changed, both the weight and thickness were within the standard values for bare tablets. In terms of standard deviation values, the tablets compressed using the conventional feed shoe shown in Figure 6 had an average weight of 0.82 mg and thickness of 0.0173 mm for 10 lots, so the variation was smaller than before. That's what I found out.

Hotplate A (1) Tablet press used Same as Experiment 1 (2) Powder used Granules, passed JIS16 mesh, apparent specific gravity 0.630, pulverization rate 32.0%, water content 3.4% , Charge amount 80KgX2 (3) Tablet machine rotation speed 40r, p, m.

(4) Measuring equipment used Weight and thickness measurements were made by @
, Same as 1, hardness measurement - Monsanto type hardness meter [manufactured by Kayagaki Irika Kogyo Co., Ltd.], skewer loss measurement - friability tester [manufactured by Kayagaki Irika Kogyo Co., Ltd., disintegration measurement - disintegration degree test fi [Manufactured by Toyama Sangyo Co., Ltd. Co (5) Naked tablet standard value Weight 160 ± 8 mg (Jpi
n deviation test 20 times, thickness 3.8 ±0.1mm (2Off average value), hardness 2.5Kg or more (2092 average value), friability - 20 tablets 15 minutes, no abnormality,
Disintegration - 6 tablets with JPI solution, within 15 minutes (6) Results The values shown in Table 4 were obtained as a result of measuring the compressed bare tablets. The conventional feed shoe shown in FIG. 6 was used, and the powder and granules were from the same lot. In both cases, the average value of 100 tablets sampled was taken.

As shown in Table 71, in terms of weight, thickness, and hardness, tableting using the feed shoe of the present invention is better than conventional tablets.
It was found that the standard deviation value was small.

The friability test and collapse test were the same as when using a conventional feed shoe.

(Effects of the Invention) As is clear from the above, the feed shoe of the present invention has the following effects:
The flow rate adjustment section is equipped with a meteor adjustment means that allows you to arbitrarily adjust the flow rate of powder or granular material by manual operation, making it easy to adjust the flow rate of powder or granular material, which previously took 10 to 20 minutes. Such adjustments can be made within 3 minutes, greatly increasing work efficiency. In addition, the flow rate of powder and granules can be adjusted accurately, eliminating the occurrence of defective tablets due to filling defects, and producing superior quality tablets with extremely small variations in weight and thickness compared to conventional methods. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a feed shoe according to an embodiment of the present invention, FIG. 2 is an enlarged view of the flow rate adjustment portion of the feed shoe shown in FIG. 1, and FIG. ■-
4 is a sectional view taken along line IV-IV in FIGS. 2 and 3, and FIG. 5 is a sectional view taken along line v-v in FIG. FIG. 6 is a sectional view of
FIG. 7 is a perspective view of a conventional feed shoe, and FIG. 7 is a perspective view of another conventional feed shoe. In the figure, reference numeral 20...feed shoe, 21...feed shoe body, 21a...outer periphery, 21b...groove, 21(...inner periphery, 22...powder flow path , 23・
...Flow rate adjustment part, 24...Damming part, 26...
・Weir member, 26a...front, 26b...hole, 27a
...Flow rate adjustment plate, 27b...hole, 27e...knurled knob, 27g...threaded rod (screw mechanism), 271.27m...click stop ■ structure, 27
n, 27p...flow gauge, 28a, 28b-...
Gap adjustment plate, 28c, 28d... Long hole, 29... Weir member, 30... Dam plate, 30a... Long hole, 33
... Gap adjustment member (felt), 34... Gap adjustment member (cloth), three... Flow rate adjustment means, 40... Hole for flow rate adjustment, 41... Gap adjustment means.

Claims (16)

[Claims] (1) The powder flow path formed in the feed shoe body has a flow rate adjustment part and a damming part, and the powder and granule supplied onto the rotary disk pass through the flow rate adjustment part by rotation of the rotary disk and pass through the damming part. In a feed shoe for a tablet press, the powder is filled into a mortar set on a rotary disk while the powder is flowing, and the flow rate of the powder or granule can be arbitrarily adjusted by manually operating the flow rate adjustment part. A feed shoe characterized by being equipped with a flow rate adjustment means that allows for. (2) The feed shoe according to claim 1, wherein the flow rate adjustment means is a flow rate adjustment hole whose size can be arbitrarily changed by manual operation. (3) The flow rate adjustment holes are formed by holes formed in the weir member attached to the powder flow path of the feed shoe body and holes formed in the flow rate adjustment plate movable with respect to the weir member. A feed shoe according to claim 2, wherein the feed shoe is constructed as follows. (4) The feed shoe according to claim 3, wherein the flow rate adjustment plate is connected to the knurled knob via a screw mechanism that converts rotation of the flow rate adjustment plate into linear movement of the flow rate adjustment plate. (5) The feed shoe according to claim 4, wherein the knurled knob is provided with a click stop mechanism. (6) The feed shoe according to item 3 of the patent scope, wherein the flow rate adjustment plate is provided with a flow rate gauge that indicates the size of the hole for flow rate adjustment. (7) The feed shoe according to claim 3, wherein a gap adjustment plate is provided on the front surface of the weir member to minimize the gap between the weir member and the rotary disk of the tablet press. (8) The feed shoe according to claim 7, wherein the gap adjustment plate is vertically adjustable by being screwed to the weir member through an elongated hole. (9) The feed shoe according to claim 3, wherein the weir member is detachably attached to the feed shoe body. (10) The feed shoe according to claim 1, wherein the dam part is provided with a gap adjusting means for adjusting the gap with the rotary disk of the tablet press in accordance with the characteristics of the powder or granular material. (11) Claims in which the gap adjustment means is constituted by a weir member attached to the powder flow path of the feed shoe main body, and a dam plate attached to the weir member so as to be adjustable in the vertical direction The feed shoe according to item 10. (12) The feed shoe according to claim 11, wherein the dam plate is vertically adjustable by being screwed to the weir member through an elongated hole. (13) The feed shoe according to claim 11, wherein the weir member is detachably attached to the feed shoe body. (14) A claim that provides gap adjusting members to minimize the gap with the rotating disk of the tablet press at the bottoms of the inner and outer circumferential portions located on both sides of the powder flow path of the feed shoe main body. The feed shoe described in item 1. (15) Claim 1, wherein the gap adjustment member on the inner circumference is a cloth stuck to the bottom thereof, and the gap adjustment member on the outer circumference is felt fitted into a groove cut in the bottom of the gap adjustment member.
The feed shoe described in item 4. (16) The feed shoe according to claim 14, wherein the gap adjusting members on the inner circumferential portion and the outer circumferential portion are both felts fitted into grooves cut in the bottoms thereof.