KR102618729B1 - powder mixing device - Google Patents

Abstract

The present invention relates to a powder mixing device, for which a base is provided with a chamber for accommodating a ton bag or storage container for storing mixed powder therein; and a base through a support frame coupled to the upper surface of the base. A mixing tank assembly that is fixed and spaced apart from; and a driving means fixed to the upper surface of the base and transmitting driving force to the mixing tank assembly, wherein the mixing tank assembly includes a mixing tank equipped with a rotating shaft and an impeller that rotates together, and a mixing tank at the front and rear of the mixing tank. It consists of a cover plate that is combined to rotatably pivot the rotating shaft, and the mixing tank has a raw material input part for inputting two or more types of powder, a raw material discharge part for discharging the mixed powder, and an external device to facilitate the discharge of the mixed powder. The air distribution part for distributing air is further coupled radially, and the chamber of the base is open at the top and is configured to store the mixed powder falling through the raw material discharge part.

Description

powder mixing device

The present invention relates to a powder mixing device. More specifically, the present invention relates to a powder mixing device, which is capable of automatically adding a fixed amount of two or more types of powder, and mixing the two or more types of powder by flowing them by a rotating air current, even powders that have solidified by friction. Not only can it be homogenized by pulverizing it, but the powder stagnating in the center of the mixing tank or adhering to the liner cover can be eliminated by the friction force and vortex of the scraper blade and circulated in the rotating air current, thereby improving the mixing efficiency of the powder. It is about a powder mixing device that allows this.

In general, devices for producing composite powders by mixing micro or submicro level powders have been proposed to express specific functionality.

However, these conventional composite powder manufacturing devices simply mix two or more types of powder by airflow, and there are cases where mixing and compounding are not performed well depending on the phase, type, or size of the powder.

Moreover, the smaller the particle size, the more the powder particles clump together and solidify, making it quite difficult to mix two or more types of powder, and mixing itself is often difficult due to solidification. Furthermore, when mixing two types of particles with different particle sizes, there was a problem in that it was difficult to uniformly mix large and small particles.

Accordingly, a device for producing composite powder by mixing two or more types of powder has been proposed. However, these conventional composite powder manufacturing devices simply mix two or more types of powder by airflow, and there are cases where mixing and compounding are not performed well depending on the phase, type, or size of the powder.

For example, there was a problem in that it was not easy to manufacture composite materials depending on the type, size, and phase of the powder, such as mixing organic and inorganic materials, mixing large- and small-particle powders, and spherical powders and needle-like powders.

Moreover, when mixing two or more types of fine powder, the mixing itself through airflow becomes poor due to solidification due to agglomeration between the fine powders, and as a result, mixing is not performed uniformly, so the operator must grind the solidified powder through a separate process. Therefore, there was the inconvenience of having to re-inject or remove it, which resulted in an increase in labor costs and production costs.

Republic of Korea Patent Publication No. 10-2019-0049353

The present invention was developed in consideration of the above problems, and the first object of the present invention is to automatically inject two or more types of powder in a fixed amount, and to mix the two or more types of powder by flowing them with a rotating air current. The aim is to provide a powder mixing device that can crush and homogenize powder solidified by friction.

The second purpose of the present invention is to allow the powder stagnant in the center of the mixing tank or adhered to the liner cover to be eliminated by the friction force and vortex of the scraper blade and circulated in the rotating air current, thereby improving the mixing efficiency of the powder. The purpose is to provide a powder mixing device that allows.

The third object of the present invention is to form an enlarged space on the outer side of the mixing space to expand the fluidity (movement) of the powder circulating by the rotating air flow to further amplify the collision and friction of the powder. The aim is to provide a powder mixing device.

According to the characteristics for achieving the above-described object, the first invention relates to a powder mixing device, for which a base is provided with a chamber capable of accommodating a ton bag or storage container for storing the mixed powder therein; and a mixing tank assembly spaced apart from the base and fixed to the base through a support frame coupled to the upper surface of the base. and a driving means fixed to the upper surface of the base and transmitting driving force to the mixing tank assembly, wherein the mixing tank assembly includes a mixing tank equipped with a rotating shaft and an impeller that rotates together, and a mixing tank at the front and rear of the mixing tank. It consists of a cover plate that is combined to rotatably pivot the rotating shaft, and the mixing tank has a raw material input part for inputting two or more types of powder, a raw material discharge part for discharging the mixed powder, and an external device to facilitate the discharge of the mixed powder. An air distribution unit for distributing air is further coupled radially, the chamber of the base has an open top, and is configured to store mixed powder falling through the raw material discharge unit, the mixing tank includes a cylindrical tank body, and the tank. A first coupling flange fixed to both sides of the circumferential surface of the body, a cooling jacket horizontally coupled between the first coupling flanges to form a first cooling passage between the tank body and the tank body, and coupled to the tank body on both sides. It consists of a liner cover that forms a mixing space and on which the rotary shaft is rotatably installed, and a cooling cover that is coupled to the outer surface of each liner cover and forms a second cooling passage between the liner covers, wherein the mixing The tank circulates coolant through a first cooling passage formed around the tank body and a second cooling passage formed on the liner cover, preventing the temperature rise of the powder due to collision, friction, and flow within the mixing space, It is characterized by being configured to prevent the properties of the powder from changing due to heat.

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The second invention is that in the first invention, the raw material input portion, the raw material discharge portion, and the air distribution portion include an operating cylinder operated by pneumatic or hydraulic pressure, and an upper and lower portion coupled to the operating cylinder and a mixing tank. It is characterized by consisting of a "type valve housing and a valve that is connected to the piston rod in the operating cylinder and controls the opening degree of the valve housing.

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In the fourth invention, in the first invention, an arch-shaped mixing surface with an inclination of 2° to 7° is further formed on the inner peripheral surface of the tank body to ensure space for movement and mixing of the powder between the impeller and the impeller. It is characterized by

In the fifth invention, in the first invention, the liner cover has a curved surface that protrudes toward the mixing space so as to invade the central area of the impeller, and a curved surface that is continuous around the curved surface and partially extends the mixing space between the impeller and the impeller. a recessed surface forming an enlarged space, a step that is continuous around the circumference of the recessed surface and in close contact with the inner peripheral surface of the tank body, and a second coupling flange that is continuous around the circumference of the step and is fastened to the first coupling flange and the cover plate. Including, the expanded space portion is characterized in that it functions to further amplify collision and friction of the powder by expanding the fluidity of the powder circulating by the rotating air flow of the blade.

In the sixth invention, in the fifth invention, the impeller includes a rotating disk fixed to a rotating shaft and rotating together, an inner ring fixed to the outer edges of both sides of the rotating disk, and a plurality of blades fixed to each inner ring at regular intervals. It includes an outer ring that is protrudingly fixed through an outer ring, a fixed disk that is fixed to the center of both sides of the rotating disk, and a plurality of scraper blades that are radially coupled to each of the fixed disks and are close to the curved surface of the liner cover. , the rotating disk is further formed with a plurality of distribution holes so that the powder can be distributed on both sides, and the scraper blade rotates in a state close to the curved surface of the liner cover to remove the adhered powder by friction force and separate the powder from the powder. It is characterized by the function of pulverizing powder through friction action.

According to the powder mixing device of the present invention, two or more types of powder can be automatically injected in a fixed amount, and the two or more types of powder added can be mixed by flowing through a rotating air current, and even the powder solidified by friction can be pulverized and homogenized. There is an effect.

In addition, the powder stagnating in the center of the mixing tank or adhering to the liner cover is eliminated by the friction force and vortex of the scraper blade and can be circulated in the rotating air current, which has the effect of improving the mixing efficiency of the powder.

In addition, by forming an enlarged space on the outer side of the mixing space, the fluidity (mobility) of the powder circulating by the rotating air stream is expanded, and the collision and friction of the powder are further amplified, allowing for faster mixing of the powder. It works.

1 to 3 are perspective views of a powder mixing device according to the present invention;
Figure 4 is a perspective view of the base extracted from Figure 1;
Figure 5 is a perspective view showing the mixing tank assembly of the present invention;
Figures 6 and 7 are cross-sectional views of Figure 5;
Figure 8 is an exploded perspective view with the cover plate removed in Figure 5;
Figure 9 is a configuration diagram showing the raw material input part, the raw material discharge part, and the air distribution part extracted from Figure 5;
Figure 10 is a perspective view showing the mixing tank extracted from Figure 8;
Figure 11 is an exploded perspective view of Figure 10;
12 and 13 are cross-sectional views showing a cooling jacket and liner cover coupled to the tank body;
Figure 14 is a perspective view showing the impeller extracted from Figure 11;
Figure 15 is an exploded perspective view of Figure 14;
Figure 16 is a cross-sectional view of Figure 14;
Figure 17 is a conceptual diagram showing the circulation path of powder according to the rotation of the impeller.

The following objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosure will be thorough and complete and so that the spirit of the invention can be sufficiently conveyed to those skilled in the art.

Embodiments described and illustrated herein also include complementary embodiments thereof.

As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, 'comprise' and/or 'comprising' do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing specific embodiments below, various specific details have been written to explain the invention in more detail and to aid understanding. However, a reader who has sufficient knowledge in the field to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known but are not significantly related to the invention are not described in order to prevent confusion in describing the invention.

Hereinafter, the powder mixing device according to the present invention will be described in detail along with the attached drawings.

1 to 3 are perspective views of a powder mixing device according to the present invention, Figure 4 is a perspective view of the base extracted from Figure 1, Figure 5 is a perspective view showing the mixing tank assembly of the present invention, and Figures 6 and 7 are Figure 5 is a cross-sectional view, Figure 8 is an exploded perspective view with the cover plate in Figure 5 separated, Figure 9 is a configuration diagram showing the raw material input part, raw material discharge part, and air distribution part extracted from Figure 5, and Figure 10 is It is a perspective view showing the mixing tank extracted from Figure 8, Figure 11 is an exploded perspective view of Figure 10, Figures 12 and 13 are cross-sectional views showing the cooling jacket and liner cover coupled to the tank body, and Figure 14 is a view of Figure 11. It is a perspective view showing the extracted impeller, Figure 15 is an exploded perspective view of Figure 14, and Figure 16 is a cross-sectional view of Figure 14.

As shown in Figures 1 to 16, the present invention can automatically inject two or more types of powder in a fixed amount, and also mix the two or more types of powder by flowing them with a rotating air current, up to the powder solidified by friction. Not only can it be homogenized by pulverizing it, but the powder stagnating in the center of the mixing tank or adhering to the liner cover can be eliminated by the friction force and eddy current of the scraper blade and circulated in the rotating air current, thereby improving the mixing efficiency of the powder. It relates to a powder mixing device (100).

1 to 3, the powder mixing device 100 of the present invention is largely composed of three parts, which may include a base 10, a mixing tank assembly 20, and a driving means 30.

As shown in FIG. 4, the base 10 is provided with a chamber 11 with an open top inside, and the chamber 11 functions to accommodate a ton bag or storage container for storing the mixed powder.

As shown in FIG. 2, the driving means 30 is fixed to the upper surface of the base 10 and functions to transmit driving force to the mixing tank assembly 20.

The driving means 30 may be configured as a three-phase induction motor, and the driving means 30 may be equipped with a driving pulley 31 that transmits rotational force to the mixing tank assembly 20.

As shown in FIG. 3, the mixing tank assembly 20 has a structure that is fixed to the base 10 in a spaced state through a support frame 12 coupled to the upper surface of the base 10.

As shown in FIGS. 5 to 8, the mixing tank assembly 20 is coupled to a mixing tank 20a in which a rotating shaft 27 and an impeller 26 that rotates together are installed, and at the front and rear of the mixing tank 20a. It consists of a cover plate (20b) that pivots the rotary shaft (27) to be rotatable.

Here, the outer surface of each cover plate 20b is coupled to the support frame 12 fixed to the base 10, as shown in FIGS. 1 to 3, to support the mixing tank assembly 20 to the upper part of the base 10. It functions to be fixed in a spaced state on the surface.

At this time, a driven pulley 271 connected to the driving pulley 31 of the driving means 30 and a belt (not shown) is coupled to the end of the rotating shaft 27 to provide a structure capable of rotation.

And the mixing tank 20a is configured to perform a series of processes in which two or more types of powder are input, mixed, and then discharged.

For this purpose, as shown in Figures 5 and 6, the mixing tank 20a has a raw material input part 40a for inputting two or more types of powder, a raw material discharge part 40b for discharging the mixed powder, and a discharge of the mixed powder. To facilitate smooth operation, the air distribution unit 40c, which distributes external air, may be configured to be further radially coupled.

As shown in FIGS. 10 to 13, the mixing tank 20a includes a cylindrical tank body 21, a first coupling flange 22 fixed to both sides of the circumferential surface of the tank body 21, and the first coupling flange 22. A cooling jacket (23) that is horizontally coupled between the flanges (22) to form a first cooling passage (23a) between the tank body (21) and the mixing space portion (23) coupled to both sides of the tank body (21). SP1) and a liner cover 24 on which the rotary shaft 27 is rotatably installed, and a second cooling passage coupled to the outer surface of each liner cover 24 and the liner cover 24. It may be composed of a cooling cover 25 forming (25a).

As shown in FIGS. 12 and 13, the mixing tank 20a has a first cooling passage 23a formed around the tank body 21 and a second cooling passage 25a formed on the liner cover 24. By circulating the cooling water, an increase in the temperature of the powder due to collision, friction, and flow within the mixing space SP1 is prevented, thereby preventing changes in the properties of the powder due to heat.

Here, circulation pipes (not marked) for circulating cooling water may be connected to the first and second cooling passages 23a and 25a, respectively.

And as shown in FIG. 10, on the circumferential surface of the tank body 21, there is a valve fixing flange 212 for coupling the raw material input portion 40a, the raw material discharge portion 40b, and the air distribution portion 40c. Can be formed by combining.

Here, as shown in FIG. 5, the raw material input part 40a is installed upright at the 12 o'clock direction, which is the upper part of the mixing tank 20a, and the raw material discharge part 40b is installed vertically at the 6 o'clock direction, which is the lower part of the mixing tank 20a. The air distribution unit 40c may be installed horizontally at the 9 o'clock or 3 o'clock position of the mixing tank 20a.

Here, the raw material input part 40a, the raw material discharge part 40b, and the air distribution part 40c have the same configuration.

As shown in FIG. 9, the raw material input part 40a, the raw material discharge part 40b, and the air distribution part 40c have an operating cylinder 41 operated by pneumatic or hydraulic pressure, and the upper and lower parts are operated by the operating cylinder 41. A “+” type valve housing 42 coupled to the cylinder 41 and the mixing tank 20a, and a valve connected to the piston rod 411 in the operating cylinder 41 to control the opening degree of the valve housing 42. It may be composed of (412).

Here, the valve housing 42 of the raw material input part 40a is connected to the operating cylinder 41 and the valve fixing flange 212, one way in the horizontal direction is used as an inspection window, and another one way is used as a raw material supply part 50. It can be configured in connection with .

In the above, the raw material supply unit 50 includes a storage tank 51 with an input hopper 511 for inputting powder, as shown in FIG. 1, and a rotating screw (not shown) built into the bottom of the storage tank 51. It may be composed of a motor 52 that rotates the rotating screw (not shown).

This raw material supply unit 50 is configured to supply powder to the input hopper 511, meter the powder using a rotating screw, and supply it to the mixing tank 20a through the valve housing 42.

In addition, one way in the horizontal direction of the valve housing 42 of the raw material discharge part 40b is used as an inspection window, and another one way is used as an outlet for dropping the mixed powder into the chamber 11 of the base 10.

In addition, one way in the horizontal direction of the valve housing 42 of the air distribution unit 40c is used as an inspection window, and another one way circulates with the atmosphere to smoothly discharge the mixed powder in the mixing tank 20a.

Meanwhile, as shown in FIG. 12, on the inner peripheral surface of the tank body 21, there is an arch-shaped mixing surface 211 with an inclination of 2° to 7° to ensure space for movement and mixing of powder between the impeller 26 and the impeller 26. More can be formed.

Here, if the inclination of the mixing surface 211 is less than 2°, it is undesirable because the space for movement of the powder is not secured and the powder is not mixed well, and if it is more than 7°, the space between the impeller 26 This is undesirable because it expands and prevents collision and friction of the powder.

As shown in FIG. 13, the liner cover 24 has a curved surface 241 that protrudes toward the mixing space SP1 so as to invade the central area of the impeller 26, and is continuous around the curved surface 241. A depressed surface 242 that partially expands the mixing space SP1 between the impeller 26 to form an expanded space SP2, and a tank body 21 that is continuous around the depressed surface 242 and forms an expanded space SP2. It is configured to include a step 243 in close contact with the inner peripheral surface of the step 243 and a second coupling flange 244 that is continuous around the circumference of the step 243 and fastened to the first coupling flange 22 and the cover plate 20b.

In the above, the mixing space SP1 is formed by the curved surface 241 and the depressed surface 242 of the liner cover 24, as shown in FIG. 13. "It takes the form of

In addition, the expanded space portion (SP2) functions to further amplify collision and friction of the powder by expanding the fluidity (movement) of the powder circulating by the rotating air flow of the blade.

The liner cover 24 is connected to the first coupling flange 22 of the tank body 21 and the second coupling flange 244 of the cover plate 20b through the second coupling flange 244 to connect the mixing tank. It functions to integrate into the assembly (20).

In addition, the liner cover 24 functions to increase collision, friction, and fluidity of the powder circulating in the mixing space SP1 through the continuous curved surface 241 and the depressed surface 242.

In addition, as shown in FIG. 12, the liner cover 24 is configured so that the step 243 is tightly coupled to the inner peripheral surface of the tank body 21, thereby doubling the binding force with the tank body 21 without leakage of powder. .

As shown in FIGS. 14 to 16, the impeller 26 includes a rotating disk 261 fixed to the rotating shaft 27 and rotating in parallel, an inner ring 262 fixed to the outer edges of both sides of the rotating disk 261, and An outer ring 264 protruding and fixed to each inner ring 262 through a plurality of blades 263 fixed at regular intervals, a fixed disk 265 fixed to the center of both sides of the rotating disk 261, and , It is configured to include a plurality of scraper blades 265a radially coupled to each of the fixed disks 265 and in close contact with the curved surface 241 of the liner cover 24.

At this time, the rotating disk 261 may be configured with a plurality of distribution holes 261a so that the powder can be distributed on both sides.

In the above, the blade 263 protrudes from both sides of the fixed disk 265 through the inner ring 262 and the outer ring 264, and is configured to be tilted at an angle of 25° to 65° along the rotation direction.

Each of these blades 263 forms a rotating airflow at the position of the mixing surface 211 of the tank body 21, and functions to mix two or more types of powder by contacting and colliding with them by the generated rotating airflow.

In addition, the scraper blade 265a rotates close to the curved surface 241 of the liner cover 24 to remove the adhered powder, and also serves to homogenize the powder by pulverizing it through friction with the powder. .

In addition, the scraper blade 265a also functions to form a vortex and circulate the powder stagnant in the center of the impeller 26 to the outer shell.

At this time, since the scraper blade 265a takes a shape curved upward close to the curved surface 24 of the liner cover 241, it functions to further increase the generation of vortices.

Hereinafter, the operation of the powder mixing device according to the present invention will be briefly described.

Figure 17 is a conceptual diagram showing the circulation path of powder according to the rotation of the impeller.

First, the first powder is introduced into the input hopper 511 of the raw material supply unit 50 and stored in the storage tank 51.

Afterwards, the rotating screw is rotated to supply the first powder stored in the storage tank 51 to the valve housing 42 of the raw material input part 40a.

At this time, the valve 412 of the raw material input part 40a is opened in the valve housing 42 and is allowed to fall into the mixing space part SP1 of the mixing tank 20a.

Then, the second, third, and fourth powders to be mixed are added through a series of processes.

At this time, the powder falling into the mixing space (SP1) can be visually confirmed through the inspection window.

And when the powder raw material supply is finished, the valve housing 42 is closed through the valve 412 to prevent the powder from scattering to the outside through the raw material input portion 40a during the powder mixing process.

Afterwards, the driving means 30 is operated to rotate the impeller 26.

When the impeller 26 rotates in the mixing tank 20a, the powder is mixed and circulated by the rotating airflow of the blade 263.

At this time, two or more types of powder are collided with the blade 263 and the mixing surface due to the movement and centrifugal force caused by the rotating air flow, generating friction.

At this time, the collision action and friction action increase the mixing of the powder, and the mobility is further expanded through the expanded space (SP2) formed in the mixing space (SP1), thereby increasing the mixing efficiency of the powder.

In addition, the pressure in the center of the impeller 26 is relatively low, so the powder located in this low-pressure area moves along the curved surface 241 of the liner cover 24.

In this way, the powder moving along the curved surface 241 of the liner cover 24 can increase its fluidity and circulation path.

And the powder moving along the curved surface 241 undergoes a secondary mixing process to homogenize the powder while repeating adhesion, detachment, and collision due to the frictional force of the scraper blade 265a.

In addition, the scraper blade 265a forms a vortex at the center of the mixing space SP1 to further circulate the powder stagnant in the center to the outer shell.

In addition, since the scraper blade 265a takes an upwardly curved shape, it is possible to further increase the generation of vortices, which ultimately increases the fluidity (mobility) of the powder across the outer edge and center of the mixing space SP1. Powder mixing can be performed more quickly.

After mixing the powder, the impeller (26) is rotated at low speed.

Afterwards, the raw material discharge part 40b and the air distribution part 40c are opened to allow the mixed powder to fall into the chamber 11 of the base 10.

Afterwards, the mixed powder that fell into the chamber 11 is collected and the work is completed.

Since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, various equivalents can be substituted for them at the time of filing the present application. It should be understood that there may be variations.

10: Base 11: Chamber 12: Support frame
20: mixing tank assembly 20a: mixing tank 20b: cover plate
21: tank body 211: mixing surface
212: Valve fixing flange
22: first coupling flange 23: cooling jacket
23a: first cooling passage 24: liner cover
241: curved surface 242: recessed surface 243: step 244: second coupling flange
25: cooling cover 25a: second cooling passage
26: Impeller 261: Rotating disk
261a: distribution ball 262: inner ring
263: Blade 264: Oering
265: Fixed disk 265a: Scraper blade
27: Rotating shaft 271: Driven pulley SP1: Mixed space part SP2: Expanded space part 30: Drive means 31: Drive pulley
40a: Raw material input part 40b: Raw material discharge part 40c: Air distribution part
41: operating cylinder 411: piston rod
412: valve 42: valve housing
50: Raw material supply unit 51: Storage tank 511: Input hopper
52: motor

Claims (6)

A base (10) provided with a chamber (11) capable of accommodating a ton bag or storage container for storing the mixed powder therein;
A mixing tank assembly (20) fixed to the base (10) in a spaced state through a support frame (12) coupled to the upper surface of the base (10); and
It includes a driving means (30) fixed to the upper surface of the base (10) and transmitting driving force to the mixing tank assembly (20),
The mixing tank assembly 20 includes a mixing tank 20a in which an impeller 26 that rotates together with the rotating shaft 27 is installed, and is coupled to the front and rear sides of the mixing tank 20a to rotate the rotating shaft 27. It consists of a cover plate (20b) that can be retracted as much as possible,
The mixing tank (20a) includes a raw material input part (40a) for inputting two or more types of powder, a raw material discharge part (40b) for discharging the mixed powder, and an air distribution system for distributing external air to facilitate the discharge of the mixed powder. The portion 40c is further coupled radially,
The chamber 11 of the base 10 has an open top and is configured to store the mixed powder falling through the raw material discharge portion 40b,
The mixing tank (20a) has a cylindrical tank body (21), a first coupling flange (22) fixed to both sides of the circumferential surface of the tank body (21), and a horizontal structure between the first coupling flanges (22). A cooling jacket 23 that is combined to form a first cooling passage 23a between the tank body 21 and the tank body 21 on both sides to form a mixing space (SP1) and the rotating shaft. A liner cover 24 on which (27) is rotatably installed, and a cooling cover coupled to the outer surface of each liner cover 24 to form a second cooling passage 25a between the liner covers 24 and the liner cover 24. (25), wherein the mixing tank (20a) has a first cooling passage (23a) formed around the tank body (21) and a second cooling passage (25a) formed in the liner cover (24), which supplies coolant A powder mixing device characterized in that it is configured to prevent the properties of the powder from changing due to heat by circulating and preventing an increase in the temperature of the powder due to collision, friction, and flow within the mixing space (SP1).
According to paragraph 1,
The raw material input portion (40a), the raw material discharge portion (40b), and the air distribution portion (40c)
An operating cylinder 41 operated by pneumatic or hydraulic pressure,
A “+” type valve housing (42) whose upper and lower parts are coupled to the operating cylinder (41) and the mixing tank (20a),
A powder mixing device characterized in that it consists of a valve (412) that is connected to the piston rod (411) in the operating cylinder (41) and controls the opening degree of the valve housing (42).
delete According to paragraph 1,
On the inner peripheral surface of the tank body (21)
A powder mixing device characterized in that an arch-shaped mixing surface 211 having an inclination of 2° to 7° is further formed between the impeller 26 and the impeller 26 to ensure space for movement and mixing of the powder.
According to paragraph 1,
The liner cover (24) is
A curved surface 241 protruding toward the mixing space SP1 so as to invade the central area of the impeller 26,
A recessed surface 242 that is continuous around the curved surface 241 and forms an enlarged space SP2 by partially expanding the mixing space SP1 between the impeller 26 and the impeller 26;
A step 243 that is continuous around the depression surface 242 and is in close contact with the inner peripheral surface of the tank body 21,
It includes a second coupling flange 244 that is continuous around the step 243 and is fastened to the first coupling flange 22 and the cover plate 20b,
The expanded space portion (SP2) is a powder mixing device characterized in that it functions to further amplify collision and friction of the powder by expanding the fluidity of the powder circulating by the rotating air flow of the blade.
According to clause 5,
The impeller 26 is
A rotating disk (261) fixed to the rotating shaft (27) and rotating together,
An inner ring 262 fixed to the outer edges of both sides of the rotating disk 261,
an outer ring 264 protruding and fixed via a plurality of blades 263 fixed to each inner ring 262 at regular intervals;
A fixed disk 265 fixed to the center of both sides of the rotating disk 261,
It is configured to include a plurality of scraper blades 265a radially coupled to each of the fixed disks 265 and close to the curved surface 241 of the liner cover 24,
The rotating disk 261 is further formed with a plurality of distribution holes 261a so that the powder can be distributed on both sides,
The scraper blade 265a rotates close to the curved surface 241 of the liner cover 24, removes the adhered powder, and functions to pulverize the powder by friction with the powder. Powder mixing device.