JP2750325B2 - Crushing and sizing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line-incorporated type crushing and sizing machine for sieving, smashing and sizing powders in pharmaceuticals, food or materials for electronic parts. is there.

[0002]

2. Description of the Related Art In the manufacturing process of pharmaceuticals and foods, the handling of powdery and granular materials is expected to increase in both types and amounts in the future. However, the powder material has many characteristics such as particle diameter, shape, fluidity, adhesiveness, and cohesiveness, and is difficult for automation and FA.

[0003] In many cases, the granular material is granulated and handled in order to improve handling properties. In fact, many pharmaceuticals and the like have undergone a granulation process such as tablets, granules, and fine granules. However, a granulator often produces granules (agglomerates) having a particle size larger than the target particle size called “dama”. Conventionally, a powder material after granulation is sieved. It was used after removing nonstandard aggregates.

For this reason, it is necessary to crush and agglomerate the agglomerates in order to increase the yield, but if the conventional sizing machine is not sieved, all of the granules will be crushed. This causes excessive generation of fine particles. Aggregates to be actually disintegrated usually exist only in a very small part with respect to the total amount, and this complete disintegration has a great problem.

[0005] In addition, many conventional crushers have an open structure, and there is a risk of cross-contamination, and the working environment is deteriorated due to generation of dust.

[0006]

Therefore, in the conventional apparatus, a sieving machine, a crusher, and a transporter communicating between the two devices are separately required, and (1) the cost of the device is increased. (2) A large installation space is required. (3) It is necessary to transfer raw materials between devices. (4) There is a risk of contamination during transfer work. (5) Dust is generated during transfer work. Etc. had many problems.

The present invention has been made in view of the above-mentioned problems, and classifies and disintegrates agglomerates of granules in a line during pneumatic transportation, and sizing the granules to a desired particle size in one pass. It is an object of the present invention to provide a pulverizer / granulator that is suitable for in-line and FA conversion in the post-process of a granulator and a dryer, and that is excellent in improving the working environment. Is what you do.

[0008]

A crushing and sizing machine according to the present invention has a bottomed sizing machine in which a number of small holes are drilled at the lower end of a cylindrical outer cylinder supported in a vertical direction. A screen is continuously provided to form a lumen portion, and a main body having a material introduction port opened to communicate with the lumen portion at an upper portion, and a shaft is provided at an axis position of the lumen portion, and a shaft is provided at an upper end of the main body. a shaft driven rotating or coupled motor and rotation provided on the external apparatus erection, half
A plurality of rectangular plates bent in the rotation direction in the middle of the radial direction
A classification impeller radially arranged with respect to the shaft and protruding toward the inner wall of the sizing screen so as to be vertical, and an inner end fixed to a lower stage of the classification impeller with respect to the shaft, , The tip that protrudes radially toward the inner wall of the sizing screen is bent.
The crushing chopper in which a plurality of crushing blades are arranged in a plurality of stages in the axial direction, and a hopper having a product discharge port opened at a lower end thereof, which is spaced apart from the outer periphery of the sizing screen, and wherein the raw material introduction is performed. The gist of the present invention is to classify and crush and classify the raw material supplied from the mouth, to classify the material, and to collect the product from the product outlet.

[0009]

[Function] The raw material particles are dispersed in the air and enter the inner cavity of the main body as a swirling flow, and are classified into fine particles and coarse particles in the classification zone where the classification impeller is rotating. Particles that are sufficiently smaller than the pore size of the sizing screen are transported as they are to the subsequent process in the air flow.
At this time, the impeller acts to push the particles out of the sizing screen.

[0010] In the classification zone, the particle material having a larger diameter than the small holes of the sizing screen falls into the sizing zone where the crushing chopper is rotating, and collides with the crushing blade of the crushing chopper. Disintegrated by shearing force. At this time, the crushing blade rotates so as to hold the agglomerate without escaping, and gives a strong shearing force.

[0011] Here, what is smaller than the screen diameter is
The air is transported by a pneumatic transport device and centrifugal action accompanying the rotation of the classifying impeller and the chopper for crushing passes through the sizing screen and is collected in the hopper. At this time, if the number of rotations of the classifying impeller and the crushing chopper is increased, it is possible to crush even hard agglomerates and to obtain a finer product particle size. In addition, by reducing the number of stages of the chopper for crushing, it is possible to cope with powdery and granular materials that are easy to pulverize. Furthermore, by changing the diameter of the small holes formed in the sizing screen, the product Is possible.

The powder that has passed through the sizing screen descends and collects in the hopper, and is transported again from the product discharge port as low-concentration air to a subsequent process.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a crushing and sizing machine according to the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a first embodiment, in which a main body 1 is vertically fixed via a mount bracket 3 to a gantry 2 assembled by a stainless steel pipe. The main body 1 has a lower end of a cylindrical outer cylinder 4 connected to a sizing screen 5, and a shaft 8 having a classifying impeller 6 and a crusher chopper 7 fixedly mounted at the center axis position. Is sealed by the lid 9.

The sizing screen 5 has a cylindrical shape with a bottom formed by a punching plate, and has a small hole 1 having a hole diameter of 0.7 to 5.0 mm over the entire surface of the peripheral wall and the bottom wall.
. 0, 10... Are drilled, and are selected and used according to the desired granularity. In addition, this sizing screen 5 can enhance the classification and pulverizing effects by changing the diameter of the small holes 10 in the straight body portion 5a and the bottom portion 5b and changing the arrangement and number of the small holes 10. it can.

The shaft 8 is rotatably mounted on a bearing housing 11 fixed on the upper surface of the lid plate 9 via a ball bearing 12 and a labyrinth seal 1.
The shaft 3 is hermetically sealed via the shaft 3 and is installed at the axis of the inner cavity 15 of the main body 1. The drive shaft of the rotation speed control motor 17 fixed to the upper end of the shaft 8 and the upper end of the gantry 2 is connected. It is rotatably connected via a coupling 14. The rotation speed control motor 17 is controlled by an inverter control device built in an operation panel 20 fixed to the gantry 2.
The peripheral speed of the chopper can be varied widely from 5.0 to 25.0 m / sec.

The classifying impeller 6 is formed by arranging a plurality of rectangular plates radially with respect to the shaft 8 and protruding vertically. The classifying impeller 6 is positioned on the upper half screen of the sizing screen 5 and classified. A zone A is configured. The gap between the tip of the classifying impeller 6 and the rectifying screen 5 is:
This has a significant effect on the classification function. If the gap is too large, the classification effect cannot be exhibited, and the gap between the two is 2 to 4 m.
m is preferred. The chopping crusher 7 has a plurality of crushing blades 7a, 7a,... Protruding radially toward the inner wall arranged in a plurality of stages in the axial direction. The number of stages of the crushing blade 7a is detachable so that it can be changed according to the hardness of the raw material and the applied particle size.

The cover 9 of the main body 1 has an inner cavity 15
A raw material supply port 21 for introducing a raw material into the hopper 22 and a product discharge port 2 for discharging the raw material after the sizing treatment are provided at a lower end of a hopper 22 which is fixed to the outside of the sizing screen 5 at a distance.
3 has been established.

Reference numeral 24 denotes a washing water inlet port opened in a part of the lid 9. Further, the casing and each member such as the rectifying screen 5 and the hopper 22 having the above configuration are made of stainless steel, and the connection structure between the outer cylinder 4 and the sizing screen 5 and the outer cylinder 4 and the hopper 22 of the main body 1 is formed by a one-touch clamp or a ferrule. It is connected and has a structure that can be easily assembled and disassembled.

As a general system using the crushing and sizing apparatus having the above configuration, as shown in FIG.
And the mixer 52 and the low-concentration air transporter 53 are connected by a pipe 55 such as a sanitary pipe or a flexible hose, and the raw material is supplied to the apparatus main body 1 by a suction-type high-concentration air transport apparatus 56.

The raw material particles are dispersed in the air and enter the inner cavity 15 of the main body 1 as a swirling flow, and the fine particles and the coarse particles are separated in the classification zone A where the classification impeller 6 is rotating. The particles that are sufficiently smaller than the pore size of the sizing screen 5 are transported to the subsequent process by the air flow as they are. At this time, the impeller acts to push the particles out of the sizing screen.

In the classification zone A, the particle raw material having a larger diameter than the small holes 10 of the sizing screen 5 falls into the sizing zone B and collides with the crushing blades 7a of the crushing chopper 7 to form the particles. Disintegrated by shearing force. At this time, the crushing blade 7a rotates so as to hold the agglomerate without escaping, and gives a strong shearing force.

Here, when the screen diameter is smaller than the screen diameter,
By the air flow by the air transport device 56 and the centrifugal action accompanying the rotation of the classifying impeller 6 and the crushing chopper 7, the air is passed through the sizing screen 5 and collected in the hopper 22. At this time, if the number of rotations of the classifying impeller 6 and the crushing blade 7a is increased, it is possible to crush even hard agglomerates and to obtain a finer product particle size. In addition, by reducing the number of stages of the chopper 7 for crushing, it is possible to cope with powdery and granular materials which are easily pulverized. Further, by changing the diameter of the small holes 10 formed in the sizing screen 5, Can also control the product granularity.

The powder having passed through the sizing screen 5 descends and collects in the hopper 22 and is transported again from the product discharge port 23 by low-concentration air to the subsequent process. In the subsequent step, solid-gas separation is performed directly in a closed container such as a mixer as shown in FIG. 5 or collected by a separation device such as a cyclone, and there is no concern about generation of dust to the outside.

After use, by filling the cavity 15 of the main body 1 with warm water from the washing water inlet 24, washing can be performed without disassembling the apparatus.

Next, FIG. 6 shows another embodiment of the crushing and sizing machine according to the present invention, and the parts different from the first embodiment will be described. Sizing screen 5 of the present embodiment
Is formed by a cylindrical upper half screen 5a formed by a punching plate and a cone screen 5b, and the cone screen 5b has an inverted conical shape having an opening angle of about 90 degrees.

A belt pulley 16 is attached to the upper end of the base shaft 8a. The belt pulley 16 is attached to the drive shaft of a rotation speed control motor (not shown) fixed to the gantry 2. The rotation speed control motor is controlled by an inverter control device built in an operation panel, and the chopper peripheral speed is controlled to 5.0 to 2 while being rotatably connected via an endless belt.
It is changed to 5.0 m / sec.

The classifying impeller 6 axially mounted on the shaft 8 has a plurality of rectangular plates radially arranged with respect to the shaft 8 and protruded vertically so that the classifying impeller 6 has a cylindrical shape. A classification zone A is formed on the half screen 5a. In addition, the chopper 7 for crushing
A plurality of crushing blades 7a, 7a,... Protruding radially toward the inner wall are arranged in a plurality of stages in the axial direction. The crushing blades 7a are positioned on the inverted cone-shaped screen 5b along the inner wall of the inverted cone-shaped screen 5b. , The lower crushing blade 7a constitutes a sizing zone B in which the crushing blade 7a is gradually shortened, and the number of stages of the crushing blade 7a is detachable so that it can be changed according to the hardness of the raw material and the applied particle size. ing.

The raw material supply port 21 is connected to the outer cylinder 4 of the main body 1.
The supplied granular material is provided in the upper cylindrical wall, and falls toward the classification zone A as a swirling flow. A hopper 22 fixed to the outside of the sizing screen 5 in a spaced position
In the lower half, the opening angle (about 90 degrees) of the cone screen 5b of the sizing screen 5 is the same.

[Shape of Classification Impeller 6] Due to the shape and peripheral speed of the classification impeller 6, the wind speed on the surface of the sizing screen 5 is different. For this reason, the classifying impeller 6 of the first embodiment has a structure bent in the middle in the radial direction, so that the force for pushing out the pulverized raw material in the radial direction is larger than that of the second embodiment, and the classification capability is good. It is.

[Shape of Crushing Chopper 7] In the apparatuses of both embodiments, a plurality of crushing choppers 7 are provided below the classifying impeller 6 to enhance the crushing capacity of the raw material. . In particular, the crushing chopper 7 of the first embodiment has a structure in which the tip of the crushing blade 7a is bent, so that the crushing capacity is increased and it is possible to cope with hard raw materials.

[Shape of the sizing screen 5] The sizing screen 5 of the first embodiment is a bottomed cylindrical type, whereas the sizing screen 5 of the second embodiment is a cone type. The cylindrical type has less retention of the raw material at the bottom compared to the cone type,
In addition, since the length of the chopper 7 for crushing at each stage can be made constant, the crushing capacity can be increased.
Further, since the screen area of the cylindrical type is larger than that of the cone type, the processing capacity of the structure of the first embodiment can be increased.

[0032]

As described above, the crushing and crushing method according to the present invention is performed.
According to the sizing machine, the sizing can be performed during the transfer of the suction air, and the in-line operation can be performed by connecting the front and rear devices. Therefore, the continuous process and the sealing process can be performed. In addition, the generation of dust can be suppressed by in-line conversion, so that the working environment can be improved and cross contamination can be prevented.

The device of the present invention is made lightweight, can be easily disassembled and cleaned, and can be assembled easily and in a short time.

Further, since an automatic cleaning device for automatically injecting hot water into the device and cleaning the inside can be installed, not only automatic cleaning is possible but also a compact structure is obtained. Therefore, it has a structure that does not take place and can be installed in any place, and has features such as being able to move freely with casters, and the effect obtained by implementing the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main body showing a first embodiment of a crushing and sizing machine according to the present invention.

FIG. 2 is a side view of the entire apparatus.

FIG. 3 is a plan view of the entire device.

FIG. 4 is a partially enlarged view of the sizing screen.

FIG. 5 is a schematic diagram and a system diagram of a sizing system in which the apparatus is connected to other devices.

FIG. 6 is a longitudinal sectional view of a main body of a crushing and sizing machine showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 4 Cylindrical outer cylinder 5 Sizing screen 6 Classification impeller 7 Crusher for crushing 8 Shaft 9 Lid plate 10 Small hole 17 Rotation speed control motor 21 Raw material supply port 22 Hopper 23 Product discharge port A Classification zone B Sizing zone

Continued on the front page (72) Inventor Masao Fukuhara 360-3-3-402 Imajuku, Chigasaki City, Kanagawa Prefecture (72) Inventor Taiji Ebisawa 4-20-18 Morisaki, Yokosuka City, Kanagawa Prefecture (56) References JP-A-2-2 35942 (JP, A) Jiko 39-21498 (JP, Y1)

Claims (4)

(57) [Claims] An inner cavity is formed by continuously connecting a bottomed sizing screen having a large number of small holes to a lower end of a cylindrical outer cylinder supported in a vertical direction. A main body having an opening of a raw material introduction port communicating with the lumen, and a shaft mounted at the axis of the lumen, and mounted at the upper end of the main body or rotationally connected to a motor provided in an external device. A rotating shaft and a plurality of rectangular plates bent in the rotational direction in the middle of the radial direction
Are radially arranged with respect to the shaft, and the classifying impeller protrudes toward the inner wall of the sizing screen so as to be vertical, and the inner end is individually provided at a lower stage of the classifying impeller with respect to the shaft. In addition, a crushing chopper in which a plurality of crushing blades having a structure in which a tip protruding radially toward the inner wall of the sizing screen is bent is arranged in a plurality of stages in the axial direction, and is separated from the outer periphery of the sizing screen. A hopper having a product outlet opening at a lower end thereof, wherein the powdery material supplied from the material inlet is classified, classified and sized, and collected from the product outlet. Crushing and sizing machine. 2. The bottomed sizing screen of the main body,
The crushing and sizing machine according to claim 1, wherein the crushing and sizing machine has a bottomed cylindrical shape. 3. The gap between the classifying impeller and the sizing screen is 1 to 6 mm.
The crushing and sizing machine described. 4. The crushing and sizing method according to claim 1, wherein the plurality of small holes perforated in the bottomed sizing screen have different hole diameters in the straight body portion and the bottom portion. Machine.