JPH066148B2 - Method and device for checking tablets under reduced pressure in a rotary powder molding machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is characterized in that in a rotary powder molding machine for compressing powder under reduced pressure to form tablets, the quality of the tablets is constantly inspected under reduced pressure inside the machine body. The present invention relates to a method and apparatus for inspecting tablet tablets under reduced pressure in a rotary powder molding machine.

[0002]

2. Description of the Related Art Conventionally, as a tableting apparatus under reduced pressure of this kind, a valve such as a rotary valve for introducing powder particles intermittently and continuously, as well as a tablet which is intermittently and continuously supplied. A state in which the tableting device is housed in a container equipped with a valve for discharging and the introduction valve and the discharge valve are respectively connected to the tableting device to reduce the presence of air and moisture in the device casing. There is known a continuous tableting device for powder and granules, which is characterized in that the tableting is carried out in accordance with (4).
No. 2-21489).

[0003]

In the prior art, there is a problem that the quality of the tablets cannot be inspected during tableting under reduced pressure.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide an annular ring at an intermediate portion of a piston when a tablet on a chute is closed by an opening / closing damper. A rotary powder that was taken into the groove and laterally moved the piston with compressed air to release the tablet in the annular groove into the atmosphere, so that the quality of the tablet could always be checked under reduced pressure inside the machine body. An object of the present invention is to provide a method and apparatus for inspecting a tablet tablet under reduced pressure in a molding machine.

[0005]

In order to achieve the above-mentioned object, the present invention is designed so that a large number of dies are fitted on a rotating disk to fill the cavities with powder, and the upper punch and the lower punch are placed between compression rolls. In a rotary powder molding machine that compresses the powder in the above-mentioned mortar every time it passes through to form a tablet, the inside of the machine is decompressed by a vacuum pump, and a powder container drum with an air valve above the powder quantitative feeder. Place a fixed amount of powder into the feedstock through the intermediate pipe to which the powder quantitative feeder and powder sensor are attached, fill the powder in the die hole with the stirring blade, and tablet under reduced pressure. The tablet is made to be molded, and the tablet discharged to the outside of the rotary disk is poured into a closed chute and is fed into a tablet storage can which is hermetically connected to the tip of the chute by a ferrule, while a closed open / close damper is provided in the middle of the chute. Arrange and lock To the take-out pipe by means of a chute, the piston cylinder is attached to the lower side of the take-out pipe in a hermetically closed state by a rule, and when the opening / closing damper is opened, the tablet on the chute is attached to the middle part of the piston. It is taken in an annular groove, and the above-mentioned piston is laterally moved by compressed air to release the above-mentioned tablet into the atmosphere, whereby the quality of the tablet is inspected. Provide a method for checking tablets.

The air valve of the powder container drum may be a nitrogen valve to remove moisture in the powder container drum and the tablet container.

Next, according to the present invention, a large number of dies are fitted on a rotary disk to fill the mortar holes with powder, and the powder is placed in the mortar holes each time the upper punch and the lower punch pass between the compression rolls. In a rotary powder molding machine for compressing and compressing tablets, a powder container drum equipped with a valve for air or nitrogen placed above the powder quantitative feeder, a lower part attached below the powder quantitative feeder. An intermediate pipe having a powder sensor attached thereto, a feed shoe connected to the lower end of the intermediate pipe, a stirring blade arranged in the feed shoe for filling powder in a die hole, and shutting off the outside air from the body. A closed box, a closed chute for taking out the tablets released to the outside of the rotary disk, a tablet storage can that is hermetically connected to the tip of the chute via a ferrule,
A closed open / close damper arranged in the middle of the chute,
A take-out pipe connected to the chute located below the open / close damper, a piston cylinder attached laterally in a closed state through a rule below the take-out pipe, and on the chute when the open / close damper is opened. A piston having an annular groove in the middle portion adapted to take in tablets, a compressed air pipe for sending compressed air from both sealed side surfaces of the piston cylinder to laterally move the piston,
One end is formed of a vacuum pump connected to the other end of a vacuum pipe connected to the closed box to reduce the pressure inside the body, and the powder is compressed under reduced pressure to form a tablet and the opening and closing damper is used. The tablet on the chute is taken into the annular groove in the middle part of the piston in a closed state, and the tablet in the annular groove is released into the atmosphere by the lateral movement of the piston by compressed air, and the quality of the tablet is constantly checked under reduced pressure inside the machine body. An inspection device for tableting tablets under reduced pressure in a rotary powder molding machine, which is characterized by being inspected.

The opening / closing damper can be opened or closed manually or automatically by a knob.

[0009]

The function of the sealed box, which is designed to shut off the outside air from the body, is reduced by the vacuum pump. And the chute that sheds the tablets and the tablet storage can are sealed. Further, the opening / closing damper arranged in the middle of the chute and the piston cylinder laterally attached below the opening / closing damper are also hermetically sealed.

The powder is compressed under reduced pressure to form a tablet, and the tablet on the chute is taken into the annular groove in the middle part of the piston in a closed state by the opening / closing damper, and the tablet in the annular groove is moved by the lateral movement of the piston by compressed air. It is released into the atmosphere, and the quality of the tablets is constantly inspected under reduced pressure inside the machine.

The valve for air or nitrogen attached to the upper part of the powder container drum depends on the powder state in the powder container drum. It is completely closed and the inside of the machine is depressurized. Next, when the powder is fine particles, it is hard to be entirely solidified and falls in the powder container drum by the vacuum force, so that the valve is opened and atmospheric air or nitrogen is gradually injected.

The powder dropped from the powder container drum is
The powder is fed into the die hole of the rotating disk through the powder quantitative feeder, the intermediate pipe, and the feedstock, and the powder sensor attached to the lower part of the intermediate pipe detects the amount of powder and the powder in the intermediate pipe. Signal will be emitted, which will activate the motor of the powder dosing device and the rotary vanes will feed the powder into the intermediate pipe.

[0013]

EXAMPLES Examples will be described with reference to the drawings. In FIG. 1, a large number of dies 2 are fitted on a rotary disk 1 to fill the mortar holes with powder, and the powder in the mortar holes is compressed each time the upper punch 3 and the lower punch 3 pass between the compression rolls. The rotary powder molding machine for molding tablets is placed in a closed box 4 that blocks the outside air from the body. And, in the closed box 4,
One end of the vacuum pipe 5 is connected and the inside of the machine body is decompressed by a vacuum pump connected to the other end.

A powder container drum 7 having an air or nitrogen valve 6 at the top is placed above a powder quantitative feeder 8, and rotary blades 9 in the powder quantitative feeder 8 are driven by a motor 10. Is rotated.

Below the powder quantitative feeder 8, an intermediate pipe 12 having a powder sensor 11 attached to the lower part is connected, and the lower end of the intermediate pipe 12 is connected to a feed shoe 13. Inside the feedstock 13, a stirring blade 14 for filling the powder into the die hole fitted in the rotary disk 1 is provided.
Is provided.

The powder sensor 11 detects the amount of powder in the intermediate pipe 12 and emits a signal when the amount of the powder is low, thereby operating the motor 10 of the constant quantity feeder 8 to rotate the powder into the rotary blades 9. It is designed to be dropped into the intermediate pipe 12 by a fixed amount by the rotation of.

The powder filled in the die hole of the rotary disk 1 is compressed by the upper punch and the lower punch 3 every time it passes between the compression rolls to form tablets, and the tablets in the die hole are punched. It is discharged onto the rotary disk 1 by 3 and is made to flow to the closed chute 16 outside the rotary disk 1 by the damper 15.

At the tip of the chute 16 is a ferrule 1
A tablet storage can 18 is hermetically connected via 7. As shown in FIGS. 2 and 3, an opening / closing damper 19 in a hermetically sealed state is arranged in the middle of the chute 16. The opening / closing damper 19 is openable / closable about a shaft 21 by rotating the knob 20 manually or automatically. 22 is a resin window cover.

A take-out pipe 23 is connected to the chute 16 located below the open / close damper 19, and a piston cylinder 25 is horizontally attached in a hermetically sealed state below the take-out pipe 23 through a rule 24. ing. Inside the piston cylinder 25, as shown in FIG.
A piston 27 having an annular groove 26 is arranged in an intermediate portion adapted to take in the tablet on the chute 16 when the opening / closing damper 19 is opened, and the piston cylinder 25 is compressed on both side surfaces 28 and 29 which are sealed. Compressed air pipe 3 for feeding air to move the piston 27 laterally
0 and 31 are provided.

3 and 4, reference numeral 32 denotes a discharge port for discharging the tablets in the annular groove 26 into the atmosphere by the lateral movement of the piston 27 by compressed air. In FIG. 4, 33 and 34 respectively. It is around the piston. In FIG. 1, reference numeral 35 is a closed window for inspection or the like.

[0021]

Since the present invention is configured as described above, it has the following effects. That is, the tablet on the chute is taken in the annular groove in the middle part of the piston in a closed state by the opening / closing damper, the piston is moved laterally by compressed air, and the tablet in the annular groove is discharged into the atmosphere, so that the inside of the body is always closed. It is possible to check the quality of the tablets under reduced pressure. With this, the weight and thickness of the tablet can be automatically measured, and the machine can be controlled as necessary.

Next, when the air valve of the powder container drum is used as a nitrogen valve and nitrogen is injected from the valve to improve the flow of the powder, moisture in the powder container drum and the tablet container can be removed to remove the powder. And tablets can be protected from moisture.

Further, by attaching a rotary solenoid or the like to the knob position of the opening / closing damper, the opening / closing damper can be automatically opened / closed, whereby the tablets can be automatically taken out.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of an inspection method for a tablet tablet under reduced pressure and its apparatus in a rotary powder molding machine of the present invention.

FIG. 2 is an enlarged plan view of the chute shown in FIG.

FIG. 3 is a sectional front view of essential parts of the piston cylinder and the like shown in FIG.

FIG. 4 is an enlarged vertical sectional view of the piston cylinder shown in FIG.

[Explanation of symbols]

 1 rotary plate 2 mortar 3 lower punch 4 closed box 5 vacuum pipe 6 valve 7 powder container drum 8 powder quantitative feeder 9 rotary blade 10 motor 11 powder sensor 12 intermediate pipe 13 feed sie 14 stirring blade 15 damper 16 chute 17 ferrule 18 tablets Storage can 19 Opening / closing damper 20 Knob 21 Shaft 22 Resin window lid 23 Extraction pipe 24 Herrule 25 Piston cylinder 26 Annular groove 27 Piston 28 Left side 29 Right side 30 Compressed air pipe 31 Compressed air pipe 32 Discharge port 33 Per piston 34 Per piston 35 Closed window

Claims (4)

[Claims] 1. A plurality of mortars are fitted on a rotary disk to fill the mortar holes with powder, and the powder in the mortar holes is compressed to form tablets each time the upper punch and the lower punch pass between the compression rolls. In a rotary powder molding machine for molding, decompress the inside of the machine with a vacuum pump, place a powder container drum with an air valve above the powder quantitative feeder, and attach the powder quantitative feeder and the powder sensor. A fixed amount of powder was fed into the feedstock through the prepared intermediate pipe, the powder was filled in the die hole by the stirring blade to form the tablet under reduced pressure, and the tablet released outside the rotary disk was sealed. Pour into the chute so that it can be fed into the tablet storage can that is hermetically connected to the tip of the chute by a ferrule, while a closed open / close damper is arranged in the middle of the chute so that the tablet can be taken out from the chute to the ejection pipe freely. Take out Attach the piston cylinder sideways to the bottom of the pipe in a closed state by a rule, and when the opening / closing damper is opened, the tablets on the chute are taken into the annular groove in the middle of the piston, and the piston is moved horizontally by compressed air. A method for inspecting a tablet tablet under reduced pressure in a rotary powder molding machine, which comprises moving the tablet and releasing the tablet into the atmosphere to inspect the quality of the tablet. 2. A valve for air in a powder container drum,
The method for inspecting tablet tablets under reduced pressure in a rotary powder molding machine according to claim 1, wherein the method is a nitrogen valve and removes moisture from the powder container drum and the tablet storage can. 3. A tumbler is fitted with a number of dies to fill the mortar holes with powder, and the powder is compressed into mortar holes every time the upper punch and the lower punch pass between the compression rolls to form tablets. In a rotary powder molding machine for molding, a powder container drum equipped with an air or nitrogen valve placed above the powder quantitative feeder, and a powder sensor attached to the lower part of the powder quantitative feeder below the powder quantitative feeder. The attached intermediate pipe, the feed bush connected to the lower end of the intermediate pipe, the stirring blade for filling the powder into the die hole, which is arranged in the feed bush, and the closed box for blocking the outside air from the body. A closed chute for taking out the tablets released to the outside of the rotating disk, a tablet storage can that is hermetically connected to the tip of the chute through a ferrule, and a closed open / close damper disposed in the middle of the chute, Above the opening / closing damper Extraction pipe connected to the chute,
A piston cylinder attached laterally in a hermetically sealed state through a rule below the take-out pipe, a piston having an annular groove in an intermediate portion adapted to take in the tablet on the chute when the opening / closing damper is opened, Compressed air pipe for laterally moving the piston by sending compressed air from both sealed sides of the piston cylinder, to depressurize the inside of the machine connected to the other end of the vacuum pipe connected to the sealed box at one end And a vacuum pump, which compresses powder under reduced pressure to form tablets, and at the same time the tablets on the chute are taken into the annular groove in the middle of the piston in a closed state by the opening and closing damper, and the piston laterally moves by compressed air. The tablets in the annular groove are released into the atmosphere, and the quality of the tablets should always be checked under reduced pressure inside the machine. Inspection apparatus under vacuum tablet tablets in a rotary powder molding machine according to claim. 4. The inspecting device for tableting under reduced pressure in a rotary powder molding machine according to claim 3, wherein the opening / closing damper is opened / closed manually or automatically by a knob.