JP2599220Y2 - Powder mixing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a powdery or granular material which can be suitably used for mixing, for example, at least one kind of additives such as pigments or coloring agents into a raw material of plastic particles as a base material. It relates to a mixing device.

[0002]

2. Description of the Related Art Conventionally, as this type of mixing apparatus, for example, Japanese Patent Application Laid-Open Nos. 2-253835 and 3-146124,
Various improvements and developments have been seen, such as in No. 3-165824. However, most of these methods employ a method in which the main ingredient and additives are separately measured, and the powders are simultaneously or separately introduced into a mixing unit such as a tumbler, followed by stirring and mixing. . In addition, an automation system for the process is also used, and weighing work, stirring and mixing work, and when molding a mixture, the supply work to the molding process and the like are automated. Same as the ones.

[0003]

In the prior art as described above, cleaning (cleaning) performed at the time of color change or the like is not easy, the equipment becomes large, and the mixing process requires time. However, rapid mixing was not possible. In the case of molding after mixing, compounding and mixing must be performed at a place remote from the molding machine, which requires labor and transportation time. In addition, there are problems that the mechanism is complicated and expensive, and the price cannot be met.

An object of the present invention is to solve the above-mentioned problems of the prior art, and therefore, it is designed to be compact so as to be able to meet the price needs, and can be easily cleaned.
It is another object of the present invention to provide an apparatus for mixing powder and granules capable of rapidly performing blending and mixing.

[0005]

In order to achieve the above object, a mixing apparatus according to the present invention comprises a hopper 1 having an internal space partitioned by a partition plate, and a powdery material in the hopper being opened from its lower end opening. A measuring chamber 4 having a receiving portion and an inner surface partitioned and corresponding to the partition plate and having an open bottom surface; and a slidably supporting weighing chamber and a position substantially offset from the lower end opening of the hopper. A bottom plate 5 having an opening 6 of the same size;
A driver 9 for moving the measuring hopper between the lower end opening of the hopper and the opening of the bottom plate, and a shutter for closing the opening when the measuring hopper moves from the lower end opening of the hopper. 10, a shot 7 for receiving the granular material in the measuring chamber falling through the opening of the bottom plate, and blowing air onto the granular material falling through the opening at a position close to the opening of the bottom plate. It has a feature constituted by an air nozzle 11 for mixing.

[0006]

In this mixing apparatus, the main agent in one space in the hopper and the additive in the other space are placed in the opening at the lower end of the hopper. In one area, the additive falls into the other area of the measuring chamber and is introduced into the measuring chamber at a predetermined ratio. When the measuring cell moves forward by the operation of the driving body, the opening at the lower end of the hopper is closed by a shutter. At this time, the additive is mixed into the main agent by the jet of air from the air nozzle, falls while being stirred, and rapidly mixes.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a preferred embodiment of a mixing device according to the present invention, which preferably comprises a pyramid-shaped hopper-1, which is tapered downward, It has an opening 2 at the lower end. Hopper
The space in 1 is divided by a substantially vertical partition plate 3 and the main agent A, which is a powder or a granule, is loaded on the side with a large capacity, and the additive B, which is a powder or granule, is charged on the side with a small capacity. .
The inside of the measuring basin 4 is divided by a partition plate 4a corresponding to the partition plate 3 of the hopper-1. Although not shown in the drawing, the partition plate 4a is attached to a long hole in the lateral direction provided on the side surface of the measuring cell so as to be finely adjustable by an attaching screw. The weighing basin 4 and members related thereto are installed under the hopper.

The measuring chamber 4 is slidably provided on a bottom plate 5 fixed substantially horizontally, and its upper and lower surfaces are open as shown. The measuring chamber 4 is preferably formed in the shape of a rectangular parallelepiped, and the upper opening surface thereof has an opening 2 at the lower end of the hopper.
Has almost the same size as. An opening 6 is formed in the bottom plate 5 at a position shifted from the opening 2 of the hopper, and the opening has substantially the same size as the opening surface of the measuring cell 4. In addition, the space between the lower part of the hopper-1 and the bottom plate 5 is closed by the side plate 1a to prevent the granular material from leaking outside.

A shout 7 is mounted below the opening 6 of the bottom plate 5, and the powder mixed with this device is taken out from an outlet at the lower end of the shout. As shown in FIG. 1, a cover plate 8 is provided at the outlet of the shout. Are configured to open and discharge.

As shown in FIGS. 1 and 4, a driving body 9 for sliding the measuring box 4 on the bottom plate 5 is provided, and an air cylinder is preferably used as the driving body. If desired, another unit or mechanism may be used. As shown in FIG. 1, the weighing basin 4 is moved forward and backward between a position below the opening 2 of the hopper and a position above the opening 6 of the bottom plate by a driving body 9.

As shown in FIG. 5, the connection between the tip of the operating shaft of the air cylinder 9 as a driving body and the measuring box 4 is loosened by receiving the enlarged portion 9a at the tip of the operating shaft by the concave portion 4b of the measuring box. It is preferable to be configured so as to be fittable and detachable, so that a slight horizontal swing generated when the measuring cell 4 is moved can be absorbed. Further, there is an advantage that the fitting connection facilitates the cleaning of the measuring cell 4, and the capacity ratio can be easily changed by replacing the measuring cell 4.

A shutter 10 is disposed to close the opening 2 when the measuring chamber 4 comes off the opening 2 at the lower end of the hopper and to prevent the powder and particles from flowing out therefrom. Therefore, the shutter 10 can be configured as a flat plate-shaped member that moves with the movement of the measuring cell 4, but preferably the shutter is provided integrally with the upper end of the measuring cell 4 as shown in the figure.

Further, in this apparatus, as shown in FIG. 3, an air nozzle is provided at a position close to the lower side of the opening 6 of the bottom plate 5, that is, at the inlet side of the upper end of the shout 7, in order to rapidly mix the powdery and granular materials. 11 are installed. The air nozzle is located at an appropriate position on the side wall and is mounted inward so as to blow air to the granular material falling from the opening 6. Preferably, the air nozzle 11 is located near the additive B as shown, and is arranged to insert the additive into the main agent by blowing air.

Preferably, a receiving plate 12 is provided at a position slightly below the nozzle 11 in the shout 7 so as to temporarily receive the powder particles falling through the opening 6 of the bottom plate 5 to promote mixing. ing. In addition, sensors 13 and 14 such as limit switches are installed to detect the presence or absence of the granular material in each area of the hopper-1. If desired, the SHUT 7 is also provided with a suitable sensor to detect the accumulation of a predetermined amount of powder in the container below the SHUT. The sensor provided on the shot is constituted by, for example, a microswitch which is turned on when the cover plate 8 is opened, and when the container below the shoot 7 is full, the cover plate is kept open and the on state is continued. Therefore, it is detected that this is full, and the mixing device is stopped.

In use, the main agent A and the additive B are inserted into the hopper 1 on the side with the larger capacity and the side with the smaller capacity, respectively, as shown in FIG. When the measuring cell 4 is moved downward, the main agent A is introduced into the wide side of the measuring cell and the additive B is introduced into the other narrow side by natural fall, and the inside of the measuring cell 4 is previously partitioned at a fixed ratio. The main agent and the additive are in a predetermined ratio.

Since the time during which the inside of the measuring chamber 4 is filled with the granular material is almost constant, the air cylinder 9 is actuated after the elapse of the predetermined time by the timer, and as shown in FIG. The measuring basin 4 has a short 7 on the bottom plate 5.
And the granular material in the measuring chamber is completely separated from the granular material in the hopper between the bottom plate 5 and the upper plate 7a of the shoe thereon. At this time, as shown in FIG. 6, a wiper 15 provided at the edge of the opening 2 prevents excess powder particles from flowing out to the measuring cell 4. Note that a transmissive level sensor or the like may be used instead of the timer, and the air cylinder 9 may be operated by detecting that the measuring cell is full by the sensor.

When the measuring cell 4 further moves forward and reaches the position of the opening 6 of the bottom plate 5, as shown in FIG. 8, the lower surface of the measuring cell 4 is open, so that the measuring cell 4 falls to the shot 7 by natural fall. And
At that time, the additive is blown into the main agent by the air jet from the air nozzle 11, and thus falls while mixing.
Next, the measuring basin 4 returns to the position below the hopper 1 shown in FIG. 6, and the above-described operation is repeated.

When an appropriate amount is accumulated in the shoe 7, the lid plate 8 is opened and discharged, placed in a container below it, and supplied to a next step such as a molding machine. When the amount of particles in the hopper becomes small, the sensors 13 and 14 detect this and stop the operation. In the illustrated example, mixing of two types of powders and granules is illustrated. However, if a plurality of partition plates 3 of the hopper and a plurality of partition plates 4a of the measuring chamber are provided, the mixing of three or more types is similarly performed. It is possible.

[0019]

As described above, the mixing device according to the present invention is composed of a hopper, a measuring cell, and a drive for moving the measuring cell, and the main agent and the additive are measured by the measuring cell. Is mixed at the time of discharge into the shot, so that a mixer such as a tumbler is not required, and therefore, it has a very simple mechanism and is compact. Therefore, mixing can be performed quickly, cleaning can be easily performed, and low cost can be realized that can meet price needs. Further, it can be used side by side with a molding machine or the like, which facilitates handling.

[Brief description of the drawings]

FIG. 1 is an elevation view of a mixing device according to an example of the present invention.

FIG. 2 is a plan view of the device shown in FIG.

FIG. 3 is an elevational view of the device shown in FIG. 1 as viewed from the other side.

FIG. 4 is a perspective view showing a main part of the mixing device.

FIG. 5 is an exploded plan view showing a connecting portion between the measuring tub used in the present invention and its driving body.

FIG. 6 is a side view showing one stage during operation.

FIG. 7 is a side view showing another stage in operation.

FIG. 8 is a side view showing still another stage during operation.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Hopper 2 Opening of hopper 4 Measuring chamber 5 Bottom plate 6 Opening of bottom plate 7 Shut 9 Driver 10 Shutter 11 Air nozzle

Claims (1)

(57) [Scope of request for utility model registration] 1. A hopper having an internal space partitioned by a partition plate.
A weighing basin receiving the granules in the hopper from the lower end opening thereof and having an open bottom surface partitioned by the partition plate, the hopper being slidably supported, and A bottom plate having an opening of substantially the same size as the measuring cell at a position shifted from the lower end opening, and a driving body for moving the measuring cell between the lower end opening of the hopper and the opening of the bottom plate. A shutter for closing the opening when the measuring chamber is moved from a lower end opening of the hopper; a shutter for receiving the powder or granular material in the measuring chamber falling through an opening in the bottom plate; An air nozzle which is located at a close position below the opening and which blows air to the particles falling through the opening to mix the particles.