JP3255435B2 - Air cut device for granulated material in extrusion granulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cut device for a granulated product in a granulating device for producing a granule by extruding a kneaded material having a relatively high viscosity.

[0002]

2. Description of the Related Art As shown in FIGS. 10 and 11, a horizontal extrusion type granulator generally comprises a kneading section 1, a driving section 2 and a forming section 3. FIG. Inside the kneading unit 1, two screw feeders 4 rotated by the motor of the driving unit 2 are provided on the left and right, and above the kneading unit 1, the kneaded material supplied from the hopper 5 is kneaded. A chute 6 to be dropped into the inside of the part 1 is open. The forming section 3 has two cylinders 7 into which the kneaded material sent by the screw feeder 4 of the kneading section 1 enters, and a large number of small holes 8 are formed on the left and right outer sides of the cylinder 7. The screw feeder 4 extends to the inside of the cylinder 7, and a pushing wing 9 is attached to the tip of the screw feeder 4 as shown in FIG. 12. In addition, a compressed air type cooler 10 for blowing cooling air is provided on the upper surface of the molding section 3. Thus, in the above granulator,
The kneaded material supplied from the hopper 5 falls into the kneading unit 1 via the chute 6 and is sequentially fed into the cylinder 7 of the forming unit 3 while being kneaded by the rotation of the screw feeder 4. The kneaded material sent into the inside of the cylinder 7 is ejected from the hole 8 formed in the cylinder 7 by the pushing wings 9, and is appropriately dropped by its own weight while being cooled by the cooling air of the cooler 10, and granulated. Things are manufactured.

[0003]

However, when the kneaded material has a relatively high viscosity, it is ejected from the hole 8 as shown in FIG. 12 in a conventional lateral extrusion type granulator. There are problems such as that the kneaded material 11 is connected in a noodle shape and a granulated product of granules is not successfully produced, or the granulated product is formed into a mass. In particular, the kneaded product containing ethyl cellulose used as the core of the sustained-release preparation has a considerably high tackiness, so that the granulated product extruded by the extruding granulator becomes noodle-like and causes blocking when dried as it is. However, there was a problem that it took time and effort to break it.

[0004]

Means for Solving the Problems The present invention solves the above technical problems, and does not have the problem that even a kneaded product having a relatively high viscosity can be connected to a noodle-like or clumpy form, and the core of a sustained-release preparation can be obtained. It is an object of the present invention to obtain a means capable of favorably producing a granulated product even when using a kneaded product containing ethyl cellulose used as a raw material. In order to achieve such an object, an extrusion granulation device for extruding a kneaded material kneaded in a kneading unit through a hole formed in a cylinder of a molding unit to perform granulation, and air nozzles above and below a side of the cylinder. A rotating shaft provided with a rectifying plate is provided at the tip of the air nozzle, and the air blown out of the nozzle by the rotation of the rotating shaft is entirely formed in a hole formed in the outer surface of the cylinder from the side. We have devised an air-cutting device for granulated material that is sprayed.

[0005]

In the extrusion granulator, the kneaded material extruded from the hole of the cylinder of the forming section is cut by air blown to the outer surface of the cylinder to produce a granulated granule.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1, 2, 6, and 7 show a forming section 3 of a lateral extrusion type granulating apparatus equipped with an air cutting apparatus according to the embodiment.
Is shown. As in the case described above with reference to FIGS. 10 to 12, the kneading section 1 is provided inside the cylinder 7 provided in the forming section 3.
A screw feeder 4 extending from the screw feeder 4 has a pushing blade 9 attached to the tip thereof. 8, a large number of small holes 8 are formed on the left and right outer sides of the cylinder 7.
Similarly, a compressed air-type cooler 10 for blowing cooling air is provided on the upper surface of the forming section 3.

According to the present invention, in the forming section 3 of the above-described lateral extrusion type granulating apparatus, air is blown from the nozzles 21 and 22 to be described later to the outer surface of the cylinder 7, and the kneaded material 11 extruded from the hole 8. The means for supporting the nozzles 21 and 22 may be, for example, two types, that is, a rotary type and a rotary type. Therefore, the following is a description of the rotary type. As shown in FIGS. 1 and 2, two upper and lower rotating shafts 11 and 12 are provided on the sides of the left and right cylinders 7, respectively. Meniscuses 13 and 14 are mounted on the base ends of these rotating shafts 11 and 12, and internal gears 15 and 16 are formed on the back surfaces of the meniscuses 13 and 14, respectively. Further, stepping motors 17 and 18 are arranged on the backs of the meniscuses 13 and 14, and the pinion gears 19 and 20 mounted on the drive shafts mesh with the internal gears 15 and 16, respectively.
The meniscus 13 and 14 are swung by the operation of
2 can be rotated. On the other hand, a plurality of nozzles 21 and 22 are attached to the rotating shafts 11 and 12,
Rectifying plates 23 and 24 are attached to the tips of 1 and 22, respectively. Thereby, the stepping motors 17, 18
When the cylinder rotates forward and backward, the nozzles 21, 2
2 is configured to repeat reciprocating swing. As shown in FIGS. 3 and 4, an air passage 25 is formed inside the nozzles 21 and 22, and this air passage 25 is communicated with an air outlet 26 at the tip of the nozzle. Thus, the air blown out from the air outlet 26 through the air passage 25 is blown out as an airflow along the inner surfaces of the current plates 23, 24, and the air is reciprocated by the nozzles 21, 22. It is designed to spray evenly on the outer surface. In addition, since those shown in the figure are configured symmetrically,
The same elements have the same left and right reference numerals.

FIGS. 6 and 7 show means for supporting the nozzles 21 and 22 by rotating shafts 30 and 31. FIG. As shown, two upper and lower rotation shafts 30 are provided on the side of the cylinder 7. A worm wheel 31 is mounted on these rotating shafts 30, and the worm 3 meshing with the worm wheel 31
2 is attached to the drive shaft 34 of the stepping motor 33, and the rotation shaft 30 is rotated in the counterclockwise direction in FIG. Further, nozzles 21 and 22 similar to those described above with reference to FIGS. 3 and 4 are attached to the rotating shaft 30. Thus, when the stepping motor 33 is operated, the nozzles 21 and 22 rotate on the sides of the cylinder 7, and the air blown out from the air outlet 26 blows evenly on the outer surface of the cylinder 7. Although only the left cylinder 7 is shown in the drawing, the right cylinder 7 is also provided with two upper and lower rotating shafts 30 having a symmetrical configuration. , 22 are attached.

Now, in the above granulating apparatus,
As in the case described above with reference to FIGS. 10 to 12, the kneaded material supplied from the hopper 5 falls into the kneading section 1 via the chute 6 and is formed while being kneaded by the rotation of the screw feeder 4. It is sequentially fed into the inside of the cylinder 7 of the part 3, and the state is as shown in FIG. 5 for the rotary type, and is as shown in FIG. 8 for the rotary type.
The kneaded material 27 thus fed into the cylinder 7 is pressed by the pushing blades 9, whereby the kneaded material 27 is ejected from the holes 8 formed in the cylinder 7, and the state shown by the projection 28 is obtained. On the other hand, in the case of a rotary type as shown in FIG.
The rotation shafts 11, 12 are rotated forward and backward by the operation of the nozzles 7, 18.
Is reciprocating swinging. In the case of a rotary type as shown in FIG. 8, the rotation shaft 30 is rotated by the operation of the stepping motor 33.
The nozzles 21 and 22 attached to the are performing a rotary motion. 5 and 8, the air blown out from the air outlet 26 at the tip of the nozzle becomes an airflow along the inner surfaces of the flow straightening plates 23 and 24 and blows out toward the side of the cylinder 7. And thus the nozzles 21, 2
The air jet 26
The air stream blown out from the cylinder 7 uniformly and intermittently blows the entire portion of the outer surface of the cylinder 7 where the hole 8 is formed, and the kneaded material in the state of the projection 28 is blown off by the air stream. Thus, the granulated material 29 cut into granules by the airflow falls, is carried out to the hopper 35 (see FIG. 2) disposed below, and is sent to the next drying step or the like. The above-described granulation process is performed by cooling air by blowing cooling air into the forming section by a cooler to improve the moldability while suppressing a rise in temperature due to kneading.

The means for supporting the nozzles 21 and 22 may be of a rotary type or a rotary type as shown in the embodiment, but if a worm gear is used as shown in FIG. There is an advantage that a large braking torque can be obtained as compared with the rack and pinion type as described above. Also,
In the configuration in which the nozzles 21 and 22 are reciprocally oscillated as shown in FIG. 1, a problem may occur in which the nozzle tip comes into contact with the granulated material and then malfunctions, but the operation shown in FIG. When the nozzles 21 and 22 are configured to rotate in only one direction, such a problem does not occur. Further, when the drive system of the nozzles 21 and 22 is installed outside the granulated material discharge system, there is no problem that the granulated material adheres to the drive system and causes malfunction.

The present invention is, of course, not limited to the above-described embodiment. For example, granulation apparatuses other than the lateral extrusion type, for example, extrusion molding apparatuses such as a cylindrical extrusion type granulator and a fine disk pelletizer. It can be applied to a granulator and the like as appropriate. In addition, the cooler 10 may be provided on the upper surface as shown in FIG. 12, but may be arranged as a pair on both sides of the cylinder 7 as shown in FIG. 9 so as to obtain a high-performance cooling effect. .

[0012]

According to the present invention, the kneaded material extruded from a large number of holes in the cylinder of the molding section is blown out from the air outlet at the tip of the nozzle into an airflow along the inner surface of the flow straightening plate. Sprays evenly and intermittently toward the side of the product, resulting in granulated material that is cut into granules. No longer. Therefore, even when a kneaded product containing ethyl cellulose used as a core of a sustained-release preparation is used, a granulated product of granules can be favorably produced. Further, since the apparatus can be configured by simply improving the conventional extrusion-type granulation apparatus, the cost is not increased and no space is required.

[Brief description of the drawings]

FIG. 1 is a perspective view of a forming part of a horizontal extrusion type granulator equipped with an air cut device according to an embodiment in which a nozzle is supported in a rotating manner.

FIG. 2 is a front view of the molded part.

FIG. 3 is a bottom view of the nozzle.

FIG. 4 is a sectional view taken along the line AA of FIG. 3;

FIG. 5 is an operation explanatory view of an air cut device according to an embodiment in which a nozzle is rotatably supported.

FIG. 6 is a left front view of a forming part of a horizontal extrusion type granulating apparatus provided with an air cutting apparatus according to an embodiment in which a nozzle is rotatably supported.

FIG. 7 is a side view of the molded part.

FIG. 8 is an explanatory diagram of an operation of the air cut device according to the embodiment in which the nozzle is rotatably supported.

FIG. 9 is a front view of a horizontal extrusion type granulator.

FIG. 10 is a side view of a horizontal extrusion type granulator.

FIG. 11 is a plan view of a horizontal extrusion type granulator.

FIG. 12 is a perspective view of a horizontal extrusion type granulator for explaining a problem to be solved by the invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Kneading part 3 Molding part 4 Screw feeder 7 Cylinder 8 Hole 11 Rotation axis 12 Rotation axis 21 Nozzle 22 Nozzle 30 Rotation axis

Claims (1)

(57) [Claims] 1. A kneaded product kneaded in a kneading section is formed in a kneading section.
Extrusion from a large number of holes drilled in a cylinder to perform granulation
A dispensing granulation apparatus, wherein air is provided above and below the side of the cylinder.
A rotary shaft equipped with a nozzle is provided and the air
-When a straightening plate is attached to the tip of the nozzle,
Air blown out of the nozzle by rotation of the rotating shaft
A structure that blows from the side to the entire part drilled in the hole on the outer surface
Air cut device for granulated material.