JP2004276504A - Method and equipment for granulating kneaded matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and equipment for granulating a kneaded matter which form the kneaded matter produced from a powder material and a resin material into grains in a mixer, while making the formed grains storable. <P>SOLUTION: The powder material and the resin material charged in the mixer 1 of which the inside is made dryable by airing are agitated by an agitating blade 5 to be made into the kneaded matter and this kneaded matter is formed into coarse grains by a crushing blade 7 rotating at a low speed. The crushing blade 7 being rotated at a high speed thereafter, fine grains are formed from the coarse grains and the grains thus formed are discharged from a discharge port 8 of the mixer 1. By installing a volume-regulating cutting machine 17 in the face of the discharge port 8, the grains being stored can be cut out by a fixed amount when they are needed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a granulating method and a granulating apparatus for molding a wet kneaded product obtained by mixing a powder raw material and a resin raw material into a granular material.
[0002]
[Prior art]
Conventionally, a powder material such as calcium carbonate or organic fiber and a resin material such as liquid rubber are kneaded using a granulator to form a granular material, and the granular material is supplied to a compression molding roll machine, It was formed in a sheet shape. The granules were made as small as possible because large individual particles would not be swallowed by the roll.
[0003]
FIG. 3 shows an example of a conventional granulating apparatus. As a specific known example, there is JP-A-9-174548.
In this granulating apparatus, a stirring blade b that rotates horizontally along the bottom surface is provided at the bottom of a sealable mixer a, and a crushing blade c that projects horizontally inside is provided on a side surface of the body. The stirring blade b is connected to the tip of a rotary shaft d that penetrates the bottom of the mixer a via a bearing, and the rotary shaft d is rotated by a gear mechanism f directly connected to a motor e. The crushing blade c is connected to a motor g provided on the side of the mixer a via a bearing.
[0004]
A required amount of the above-mentioned powdery raw material and resin raw material are put into a mixer by a required amount, and both the raw materials are mixed by rotating the stirring blade b and the crushing blade c, and then kneaded to produce a clay-like (wet) kneaded material. I do. The stirring blade b stirs and mixes the raw material, and the crushing blade c breaks the raw material in the course of kneading, so that a kneaded material uniformly generated as a whole is obtained.
[0005]
A discharge port h of the kneaded material is formed at a lower portion of the side surface of the mixer a. When the outlet h is released, the produced kneaded material is supplied to the granulator m through the outlet h through the hopper k installed below so that the kneaded material is discharged to the rotating stirring blade b.
[0006]
The granulator m has an extruder n composed of a screw conveyor rotating in a cylindrical body, and an extrusion port o having the inside divided by a plurality of holes or a plurality of passages. When the kneaded material is extruded from the extrusion port o with the rotational pressure of the extruder n, the kneaded material becomes a plurality of string-like bodies. To form a large number of granules. Although not shown below the extrusion port o, if a receiving container is installed, the granular material is stored in the receiving container.
[0007]
[Problems to be solved by the invention]
In the above granulator, the body of the mixer a has a jacket structure, and the inside of the mixer a is cooled by passing cooling water through the jacket q, but the inside of the mixer a is in a closed state. Therefore, the moisture was so high that granulation could not be performed in the mixer a.
For this reason, since the granulator m is required separately, cleaning and inspection work of the granulator m is required in addition to the mixer a, and maintenance and management are troublesome and costly. Moreover, in the conventional apparatus, since all the granular material is discharged, a container for accommodating and storing the granular material is required, and a storage place for the container must be secured, and the labor of the worker who transports the container is required. The burden was heavy.
[0008]
The present invention has been made in view of the above-mentioned problems of the conventional granulating apparatus, and provides a method and an apparatus for granulating a kneaded material, which can form the kneaded material into granules in a mixer. Another object of the present invention is to provide a granulating apparatus capable of storing molded granules in a mixer and discharging a required amount as needed.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the method of granulating the kneaded product of the present invention, the powder raw material and the resin raw material charged into the mixer 1 are stirred by the stirring blade 5 to form a kneaded material, and the kneaded product is stirred by the stirring blade 5. A coarse granulation step of forming coarse particles by crushing blades 7 while kneading the mixture while aerating the inside of mixer 1 and a final granulation step of forming fine particles by crushing blades 7 of coarse particles. The crushing blade 7 can switch between low-speed rotation and high-speed rotation. In the above method, a method in which the kneaded material generated in advance is charged into the mixer 1 and granulated can be adopted.
[0010]
Further, the apparatus for granulating the kneaded material of the present invention is provided with a stirring blade 5 for kneading the powder raw material and the resin raw material in the mixer 1 and a crushing blade 7 for crushing the kneaded material. And a granular material is formed, and the granular material can be discharged from the discharge port 8. Further, a stirring blade 5 for kneading the powder raw material and the resin raw material is provided in the mixer 1, and a crushing blade 7 for crushing the kneaded material is provided. A fixed quantity cutting machine 17 is provided below the body discharge port 8.
[0011]
In the above-described granulation method or granulation apparatus, the kneaded material circulating in the mixer 1 is crushed by the crushing blades 7 provided on the body side surface of the mixer 1 and capable of switching between low-speed rotation and high-speed rotation. is there. The resin raw material contains a volatile solvent.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a first embodiment of the granulating method or the granulating apparatus of the present invention, and the mixer 1 has a stirring mechanism and a crushing mechanism. The stirring mechanism is provided with a stirring blade 5 at the upper end of a rotating shaft 4 directly connected to a gear mechanism 3 that rotates by using a motor 2 as a driving source. The rotating shaft 4 penetrates the bottom of the mixer 1 via a bearing, and the stirring blade 5 rotates horizontally along the bottom of the mixer 1.
[0013]
The crushing mechanism has a crushing blade 7 provided on a rotating shaft of a motor 6 installed on a side surface of the body of the mixer 1. The rotating shaft passes through the body of the mixer 1 through a bearing, and the crushing blades 7 are directed toward the center of the mixer 1. A discharge port 8 provided below the body of the mixer 1 can be opened and closed by an on-off valve 10 that reciprocates by operating a cylinder 9, and the outer periphery of the body is covered with a water cooling jacket 11.
Such a basic configuration is the same as that of a conventional granulation apparatus.
[0014]
The present invention is characterized in that, during the granulation step, the inside of the mixer 1 is aerated so that the inside of the mixer 1 can be dried, and the crushing blade 7 can be switched between low-speed rotation and high-speed rotation. . For switching the rotation of the crushing blade 7, for example, a pole change motor or an inverter can be used. Further, for ventilation, an air intake port 12 and an exhaust port 13 are provided on the upper surface of the mixer 1, and the exhaust port 13 and the exhaust blower 14 are connected by an exhaust pipe 15. The air intake 12 is provided with a filter for preventing intrusion of dust, and the exhaust port 13 is provided with a filter for preventing outflow of raw materials.
[0015]
The present invention has the above-described structure, and requires the same powder material and resin material as in the prior art by using the above-described air intake port 12 in the mixer 1 or by opening the lid 16 at the top of the mixer 1. Put in the amount. Thereafter, the stirring blades 5 are rotated, and the raw materials are kneaded mainly by the stirring blades 5 to produce a clay-like kneaded material A. The crushing blade 7 is also rotating at an initial stage of kneading, but the crushing blade 7 is rotated at a low speed of, for example, about 1500 to 1800 rpm to perform coarse granulation while crushing the kneaded material A.
[0016]
After a certain period of time has passed and the coarse granules have been formed (coarse granulation step), the crushing blade 3 is rotated at a high speed of, for example, about 3000 to 3600 rpm, and the coarse granules are formed in the final granulation step. To form fine particles having a size of 1 to 10 mm as a whole. The kneaded material or the granular material is circulated in the horizontal direction along the inner wall surface of the mixer 1 by the stirring blade 2 and hits the crushing blade 3 in the middle of the circulation, so that it is uniformly crushed.
[0017]
In all stages of the coarse granulation step and the final granulation step from the start of granulation, the exhaust blower 14 is operated to suck air into the mixer 1, and at the same time, exhaust air is dried while ventilating the inside of the mixer 1; Promotes granulation. When the raw material contains a volatile component such as toluene, it is recovered at the same time as the exhaust gas. In addition, an inspection port may be provided in the body of the mixer 1 to check the state of granulation.
When the granulation is completed, all the operations are stopped, and the outlet 8 may be completely or partially opened to take out the granular material.
[0018]
The ventilation amount (air amount) in the mixer 1 is determined by an experimental value or a chemical property of the volatile solvent “the relational expression between temperature and vapor pressure V = f (p, Temp)”. V is the required exhaust air volume, p is the solvent vapor pressure, and Temp is the temperature.
[0019]
FIG. 2 shows a second embodiment of the granulating apparatus of the present invention, and the same parts as those described above use the same reference numerals.
This embodiment is characterized in that a fixed amount cutout machine 17 is provided below the discharge port 8 of the apparatus shown in the first embodiment. This fixed quantity cutting machine 17 has a fixed quantity cutting member 19 such as a screw conveyor installed horizontally so as to penetrate a hopper 18 connected to the discharge port 8, and a supply port 20 for granular material is provided at a tip end. .
[0020]
In such a configuration, after the granular material is formed in the mixer 1 by the same process as described above, the granular material is stored in the mixer 1 as it is. When the granular material is required, the discharge port 8 is opened, the granular material is dropped into the hopper 18, and the required amount is supplied to the receiving container 21 from the supply port 20 by operating the fixed amount cutting member 19. Since the receiving container 21 is fixed on the measuring device 22, when the measuring device 22 measures the set value, the driving of the motor 23 is stopped and the cutting of the granular material is stopped.
[0021]
Alternatively, after the granules are formed in the mixer 1, the outlet 8 may be opened, the granules may be stored in the hopper 18, and the granules may be cut out as needed. Further, an automatic opening / closing valve (not shown) is provided at the supply port 20, and the opening / closing valve is opened to perform cutting, and when the cutout amount reaches a predetermined value, the motor 23 is stopped and the automatic opening / closing valve is opened. May be closed.
[0022]
If the computer manages the opening and closing of the discharge port 8, the rotation and stop of the screw conveyor driven by the motor 23, the opening and closing of the automatic opening and closing valve, and the weighing by the measuring device 22, the cutting operation can be automatically and efficiently performed. It is. In addition, the fixed quantity cutting member 19 is not limited to the screw conveyor, and a vibration feeder may be used.
[0023]
A sensor 24 (upper limit) and a sensor 25 (lower limit) capable of detecting the storage amount of the granular material are provided on the upper and lower side surfaces of the hopper 18, and the cylinder 9 is operated according to the increase or decrease of the storage amount, and the discharge port 8 is controlled. May be automatically opened and closed.
In the above description, the gear mechanism 3 is used to rotate the stirring blade 5, but the rotation shaft 4 may be rotationally driven by a belt or a chain.
[0024]
In the description of the first and second embodiments described above, the kneaded material is generated in the mixer 1 and granulated, but the present invention is not limited to this. For example, a kneaded material in the form of clay is generated in advance using another device, and the kneaded material is put into the mixer 1 and stirred with the stirring blade 5 while ventilating, and crushed by the crushing blade 7. You may make it granulate.
[0025]
【The invention's effect】
According to the present invention described above, the powder raw material and the resin raw material are stirred by the stirring blades 5 in the mixer 1 to generate a clay-like kneaded material. Since the crushing is performed by the switchable crushing blade 7, the kneaded material can be gradually reduced in particle size from coarse particles to fine particles. During the process of forming the granular material, air can be circulated in the mixer 1 so that the inside of the mixer 1 is kept in a dry state, and the raw material containing water is dried. Granules can be formed.
In addition, if a fixed amount cutout machine 17 is installed below the outlet 8 of the mixer 1, the formed granular material can be stored in the mixer 1 or the hopper 18. The container may be cut out, and does not require a container for accommodating the granular material or an installation place of the container.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a granulating method or a granulating apparatus of the present invention.
FIG. 2 is a side view showing another embodiment of the granulating apparatus of the present invention.
FIG. 3 is a front view showing an example of a conventional granulation apparatus.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 mixer 2 motor 3 gear mechanism 4 rotating shaft 5 stirring blade 6 motor 7 crushing blade 8 discharge port 9 cylinder 10 on-off valve 11 water cooling jacket 12 air intake 13 exhaust port 14 exhaust blower 15 exhaust pipe 16 lid 17 fixed-quantity cutout machine Reference Signs List 18 Hopper 19 Fixed-quantity cutout member 20 Supply port 21 Receiving container 22 Meter 23 Motor 24 Capacity detection sensor 25 Capacity detection sensor

Claims (7)

The powder raw material and the resin raw material charged into the mixer 1 are stirred by the stirring blade 5 to form a kneaded material, and the kneaded material is agitated by the crushing blade 7 while agitating by the stirring blade 5 and aerating through the mixer 1. A method for granulating a kneaded material, comprising: a coarse granulation step of forming a body; and a final granulation step of forming a fine body by the crushing blades 7 of the coarse body. The kneaded material generated in advance is put into the mixer 1, and the kneaded material is agitated by the agitating blades 5 and agitated with the crushing blades 7 to form a coarse-grained material while passing through the mixer 1. A granulation method for a kneaded material, comprising: a final granulation step of forming fine granules by the crushing blades 7. The method for granulating a kneaded material according to claim 1, wherein the crushing blades (7) are provided on a side surface of the body of the mixer (1) to enable switching between low-speed rotation and high-speed rotation. 3. The method for granulating a kneaded product according to claim 1, wherein the resin raw material contains a volatile solvent. A stirring blade 5 for kneading the powder raw material and the resin raw material is provided in the mixer 1 and a crushing blade 7 for crushing the kneaded material is provided. The inside of the mixer 1 forms a granular material by allowing air to flow. An apparatus for granulating a kneaded material, which can be discharged from the discharge port 8. A stirring blade 5 for kneading the powder raw material and the resin raw material is provided in the mixer 1 and a crushing blade 7 for crushing the kneaded material is provided. The inside of the mixer 1 forms a granular material by allowing air to flow therethrough. An apparatus for granulating a kneaded material, comprising a fixed quantity cutting machine 17 provided below the discharge port 8. 7. The kneaded material according to claim 5, wherein the crushing blades 7 are provided on the side surface of the body of the mixer 1 and enable switching between low-speed rotation and high-speed rotation to crush the kneaded material circulating in the mixer 1. Granulation equipment.

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