JPH03169334A - Powder mixing apparatus - Google Patents

Abstract

PURPOSE:To efficiently perform mixing by mounting a support for supporting the constricted part of a mixing container in a reversibly revolvable manner and a stationary type mixer. CONSTITUTION:When a mixing container 10 is revolved by operating a motor 22, two or more kinds of powders flowing down from an upper storage part 10b to a lower storage part 10c repeat separation and confluence by a stationary type mixer 14 when passing through a constricted flow pipe part 10a and fall while they are mixed mutually. As a result, a part of the powders flows down along the surface of a spiral body 14 and falls from the notches 14 formed on the spiral body on the way. A part of the powders falls while colliding with the inner surface of the stationary type mixer 14, the inner surface of the constricted flow pipe part 10a or a shaft body 14a. By this constitution, the powders of respective layers can be mutually mixed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a powder mixing device for uniformly mixing a plurality of types of powder or granules.

[Prior art] Multiple types of substances, especially powdery substances (hereinafter referred to as powder), are used in chemical experiments, chemical processes, construction work sites, etc.
Powder mixing equipment is used to disperse, mix, or homogenize the powder.

These types of powder often have different densities or particle sizes, and a device that rotates a cylindrical container has been widely used as a mixing means suitable for this purpose.

In a mixing device using such a rotating cylinder, each powder is put into a cylindrical container whose longitudinal direction is horizontal, and then the cylindrical container is reversely rotated or rotated in each direction by a predetermined drive mechanism. Try to mix the powder inside by shaking or other methods to obtain a homogeneous mixture.

However, in such a conventional device, since the d-coupling action is always applied to the entire cylindrical container, there are disadvantages such as a heavy load on the support section, high energy consumption, and an unavoidable increase in the size of the device. was there.

In contrast to such a conventional powder mixing device, the present inventors first arranged a stationary mixing blade in a vertically placed passageway, introduced the powder for mixing from above the passageway, and mixed the powder. proposed a device in which the mixture is mixed while falling through a mixing blade due to gravity (
Patent Application No. 63-303299).

That is, the mixing blade in the passage is formed in a spiral shape,
A large number of notches are formed on its surface. These notches are arranged so that the phase differs in the vertical direction of the mixing blade, so that the injected powder passes through and stops through the notches of the mixing blade and mixes with each other due to the slope of the spiral blade. It will descend towards the outlet below.

According to this device, the powder is simply introduced from above the container without driving the passage itself, and the mixing action is automatically performed by the geometry of the spiral mixing blades by effectively utilizing gravity. , an efficient mixing effect can be achieved without requiring a complicated mechanism.

[Problem R that the invention seeks to solve]

However, in the device using the spiral mixing blade as described above, the powder is basically introduced from the top of the passageway and mixed in one stroke until it falls to the bottom. There was a problem that mixing was not performed sufficiently.

The present invention has been made in view of the above-mentioned conventional problems, and its object is to provide a powder mixing device that can reliably, easily, and efficiently mix powders.

[Means for Solving the Problems] In order to achieve the above object, the first invention of the present application has a pair of storage parts facing each other via a constricted flow pipe part, into which a plurality of types of powder are charged. A mixing container, a support for supporting the mixing container so as to be able to rotate around its constricted flow pipe, and a static mixer disposed within the constricted flow pipe of the mixing container, It is characterized by mixing in the constricted flow pipe part while dropping from one storage part to the other storage part.

Further, a second invention of the present application is characterized in that a vibrator for applying vibration to the static mixer or both the static mixer and the mixing container is disposed.

Furthermore, the third invention of the present application provides a guide for guiding the powder in each layer in the depth direction of the storage part to the constricted flow pipe part in parallel when the mixing container is reversely rotated. It is characterized by a plate.

[Operation j] According to the first invention of the present application configured as described above, after the powder is introduced into one storage section of the mixing container, the container is folded by the support so that the storage section on the powder input side is on the upper side. When the container is rotated at a predetermined angle, the powder is mixed by the stationary mixing blade in the constricted flow pipe and falls to the storage section below and is deposited, so gravity is used without the need to apply dynamic stirring force. The mixing action is carried out.

After all the powder has fallen, the mixing container can be rotated upside down using the support and the falling mixing action can be performed again easily based on the hourglass principle. A mixed state can be obtained.

Further, according to the second invention of the present application, when the powder is mixed as it falls, fine vibrations are applied to the static mixer in the constricted flow pipe section or to both the mixer and the mixing container using a vibrator. The mixing effect of the powder when passing through the pipe can be further enhanced.

Furthermore, according to the third invention of the present application, when the mixing container is inverted by the support, the powder flowing down toward the constricted flow pipe part by the guide plate forms a plurality of independent flows corresponding to the position in the depth direction. For example, the powder deposited on the upper side of the reservoir, the powder located in the middle layer, and the powder deposited on the bottom are guided to the constricted flow pipe through separate paths, and as a result, the powder in the reservoir It is possible to avoid the inconvenience of the upper and lower layers not being mixed, and it becomes possible to mix the entire powder evenly.

[Example] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the overall structure of the apparatus of the present invention, in which a mixing container 10 is supported by a support 12 so as to be able to rotate in reverse.

The mixing container 10 is formed into an hourglass shape in which a pair of storage sections 10b and 10c communicate with each other through a constricted flow pipe section 10a, and a plurality of types of powder put into either storage section 10b or 10c fall. When moving toward the other storage section, the mixture is subjected to a mixing action within the constricted flow pipe section 10a, and for this reason, a static mixer 14 is disposed within the constricted flow pipe section 10a as a mixing means.

As mentioned above, the mixing container 10 is supported by the support 12 so as to be able to rotate in reverse, and is driven by the motor 22 disposed above the support 12 around the central shaft 20 fixed to the constricted flow pipe portion 10a. Drive gears 24 and 26 are in a connected state.

One storage section 10c of the mixing container 10 is configured to be openable and closable with a lid 11 in order to charge the powder therein.

Static mixer 14 disposed within the constricted flow pipe section 10a
gives a mixing effect by repeating effective separation and merging when multiple types of powder flowing from the upper storage part 10b fall to the lower storage part 10c due to gravity, and this is shown in Figure 2. Parts are shown enlarged.

The static mixer 14 in the constricted flow pipe section 10a is connected to the shaft section 1.
A spiral portion 14b is wound around 4a, and the spiral portion 14 has a plurality of irregularly shaped notches 14c.

The operation of the device of the present invention will be explained below.

It is now assumed that powder exists inside the storage section 10b of the mixing container 10. Motor 22 is activated to rotate mixing vessel 10 and hold it in an upright position as shown in FIG.

Then, the plurality of types of powders flowing down from the upper storage section 10b to the lower storage section 10c are constricted and flowed into the flow pipe section 10.
When passing through a, the static mixer 14 repeats separation and merging, and the mixture falls while being mixed with each other.

That is, when the mixing container is placed in the state shown in FIG. 1, the plurality of types of powder in the upper storage section 10b flow downward due to gravity and are subjected to the mixing action.

As a result, part of the powder flows down along the surface of the spiral body 14, part of it falls from the notch 14c formed in the middle, and part of the powder flows into the static mixer 14 and the constricted flow pipe. It falls while colliding irregularly with the inner surface of the portion 10a or the shaft body 14a.

It is understood that by disrupting the flow of the powder in this way, the respective powders intersect with each other appropriately, and a basic mixing effect is obtained when passing through the constricted flow pipe portion 10a.

In this way, when all of the powder in the upper storage section 10b is mixed and falls to the lower storage section 10c, if the desired mixed state is obtained, the powder can be taken out in that state. However, if you want to further advance the mixing action, operate the motor 22 to rotate the mixing container 10 by 180 degrees, and perform the falling powder mixing action again with the mixing container 10 turned upside down compared to Fig. 1. good.

According to the present invention, since the mixing is performed using gravity based on the hourglass principle, by repeating the above-mentioned mixing cycle several times, the entire powder can be reliably uniformly distributed in an extremely efficient manner. Furthermore, since the mixing container 10 is driven by a motor, no human labor is required.

In addition, if a transparent material is used for the mixing container 10, the mixing state can be grasped at a glance from the outside.

Furthermore, the static mixer 14 is not limited to the structure shown in FIG.
As shown in Fig. 3, blades 32. 34 arranged alternately, or as shown in FIG.
A structure in which a large number of convex portions 38 are formed on the circumferential surface may also be applied.

Furthermore, in the above embodiment, the mixing action itself depends only on the relative action between the powder falling by gravity and the static mixer 14, and no active mixing force is used at all.
As shown in the figure, if a pie break 40 is disposed on the mixing container 10, and the pie break 40 is connected to the static mixer 14 to apply minute vibrations to the mixer 14, the mixing action can be further promoted. , it is possible to quickly achieve the desired mixing state.

In the present invention, it is more effective if fine vibrations are applied not only to the mixer 14 but also to the entire mixer section including the static mixer 14.

FIG. 5 shows the device structure in this case, in which a self-oscillating type vibrator 41 is fixed to the outer surface of the constricted flow pipe section 10a,
and storage section 10b of mixing container 10. A bellows-shaped damper portion 43.4 is provided at the boundary between the constricted flow pipe portion 10c and the constricted flow pipe portion 10a.
5 is provided.

As a result, when the pie break 41 is actuated, the constricted flow pipe portion 10a on the container side and the static mixer 14 vibrate simultaneously, so that the mixing effect is significantly enhanced.

Here, due to the damping effect of the damper portions 43 and 45, the vibrations do not reach the storage portions 10b and 10c, and the constriction including the mixer 14, which is a substantial mixing portion, is prevented from applying an excessive load to the pie break 41. It is possible to efficiently apply vibration only to the flow pipe portion 10a.

By the way, in the hourglass-shaped mixing device according to the present invention as described above, especially when the amount of powder is large, it is difficult to mix the powder located in the upper layer of the storage part with the powder located in the lower layer. becomes difficult.

That is, as the storage section 10b or 10c is reversely rotated and lifted upward, the powder flows down toward the constricted flow pipe section 10a as described above. Naturally, the powder located below the upper storage part 10b in the figure enters the constricted distribution pipe part 10a first, and the powder located in the lower part does not move to the constricted distribution pipe part 10a after a predetermined period of time. . Therefore, the mixing action in the constricted flow pipe section 10a is affected by the storage state of the powder, and it is necessary to repeat the mixing cycle by inverting and rotating the mixing container 10 until the upper layer and the lower layer are completely mixed. .

Therefore, in the present invention, the flow of powder toward the constricted flow pipe section 10a is controlled, and the powder in the depth direction within the storage section 10b or 10C is almost simultaneously moved toward the constricted flow pipe section 10a.
We realized a structure that leads to

This will be explained with reference to FIG. 6 and subsequent figures.

FIG. 6 shows the device according to FIG. 1 viewed from the left,
A plurality of types of powder are put into the lower storage section 10c. For the sake of simplicity, elements that are not directly related to the features of this embodiment, such as the drive mechanism of the support body 12, have been omitted for easier understanding.

The characteristic feature of the present invention is that the constricted flow pipe portion 10a
The structure is such that the powder in each layer in the depth direction of the storage section flows in parallel into the constricted flow pipe section 10a at the same time by controlling the flow of powder toward the constricted flow pipe section 10a.

That is, as shown in FIG.
A plurality of guide plates 42, 44, and 46, 48 are disposed in each of the three stages of the storage tank (in the illustrated example, two guide plates 42, 44, and 46, 48). It is guided to the constricted flow pipe section 10a.

The guide plates 42 and 44 are on one side of the storage section 10c,
That is, it is disposed on the rear side with respect to the turning direction, and has a partition plate shape with a large surface area that extends in the radial direction of the storage portion 10c.

It is understood that the lower ends of the guide plates 42 and 44 are located at a level that divides the depth direction of the powder B into thirds. The powder belonging to these three regions in the depth direction will be expressed as P t − P 2 and P 3 from the bottom, respectively.

From this state, the mixing container 10 begins to rotate counterclockwise,
When the state shown in FIG. 7 is reached, three areas are formed between one inner surface of the storage section 1oC and the guide plate 42, between the guide plates 42 and 44, and between the guide plate 44 and the other inner surface of the storage section. A separated powder flow path is created. For convenience, these channels are referred to as the first channel I and the second channel ■.
and the third flow path ■.

The powder of the P1 layer flows into the first flow path I, the powder of the P layer flows into the second flow path (2), and the powder of the P3 layer flows into the third flow path (2) at the largest proportion.

When the mixing container 10 continues to rotate further and reaches the final position shown in FIG. The powder that was present in the upper layer of the storage section 10c and the powder that was present in the lower layer before flowing in and swirling are simultaneously subjected to the mixing action, and only the powder P1 in the upper layer is mixed preferentially first. This prevents the unbalanced state of stirring, and it becomes possible to obtain a more effective stirring action with a simple configuration.

After all the powder has fallen in the state shown in Figure 8, in order to repeat the same mixing cycle, the 9th
As shown in the figure, the mixing container 10 may be rotated clockwise in the opposite direction. In this case, the guide plate 4 in the storage section 10b
6.48 provides a similar powder parallel inflow effect.

Therefore, according to this embodiment, the rotation angle of the mixing container 10 for performing one cycle of mixing action is only 180''.
For this reason, for example, the drive control lead wire of the piebrator 40 can be directly connected if it has a length that allows movement in this 180° turning section, and a brush can be used to prevent the lead wire from being twisted and cut. It is not necessary to take a complicated structure such as applying current while making rotating contact through the rotary contact.

[Effects of the Invention] As explained above, according to the present invention, when powder falls downward due to gravity, it is mixed through a stationary mixing blade,
After one cycle of mixing, the mixing container is turned around and the same mixing process is repeated repeatedly.
It is possible to apply a mixing action to the entire powder extremely efficiently and evenly.

Moreover, according to the second invention of the present application, the mixing effect can be further enhanced by applying minute vibrations to the mixing section.

Further, according to the third invention of the present application, by disposing a guide plate in the storage section, it is possible to simultaneously mix powders in each layer in the depth direction within the storage tank, which has not been possible in the past.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing one embodiment of the device of the present invention, Fig. 2 is an enlarged view of the static mixer in Fig. 1, and Fig. 3 is a diagram showing a plurality of blades arranged alternately on a shaft body. Another configuration diagram of a static mixer. Figure 4 is another configuration diagram of a static mixer with a large number of protrusions arranged on the shaft. Figure 5 is a constricted flow pipe section including the static mixer. Fig. 6 is a block diagram showing a third embodiment of the device of the present invention in which a guide plate is arranged in the storage section; Fig. 7 is a block diagram of an embodiment in which the entire device is vibrated; FIG. 8 is an explanatory diagram showing the state in which the mixing container has reached the final position in the third embodiment. FIG. 9 is an explanatory diagram showing the state in which the mixing container has reached the final position in the third embodiment. FIG. 10...Mixing container 12...Support 14...Static mixer 40...Pie break 42, 44...Guide Plate Reika Kogyo Co., Ltd.

Claims (3)

[Claims] (1) A mixing container having a pair of storage parts facing each other via a constricted flow pipe, into which a plurality of types of powder are charged, and the mixing container being able to be reversed and rotated around the constricted flow pipe. a support supported by the mixing container; and a static mixer disposed within the constriction flow pipe section of the mixing container, the powder being alternately dropped from one storage section to the other storage section, A powder mixing device characterized by mixing in a pipe section. (2) The powder mixing apparatus according to claim (1), further comprising a vibrator that vibrates the static mixer or both the static mixer and the mixing container. Device. (3) In the apparatus according to claim (1), when the mixing container is reversely rotated, the powder in each layer in the depth direction of the storage portion is distributed in parallel through the constriction in the storage portion of the mixing container. A powder mixing device characterized by having a guide plate for guiding the powder to a pipe section.