JPH0213042Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a defoaming container for viscous material, and in particular, provides a defoaming container for use in a viscous filling device, which is suitable for filling highly viscous viscous materials into small containers with high precision without containing air bubbles. It is something to do.

Conventionally, 10,000 to several million centipoise (C, P)
In order to fill small containers (filling containers) such as those for retail use with highly viscous viscous substances, for example, a filling device that combines a piston and a valve, or a system that combines a piston and a valve (rotary piston system) is used to fill a fixed volume of viscous material. Methods include filling the container with a viscous material, and dropping the viscous material into a filling container provided at the top of a weighing scale while measuring the weight. In either method, when filling a highly viscous substance, it is important to fill a certain amount accurately and without bubbles in order to increase the commercial value. It is particularly important to ensure that the viscous material in the filled container does not contain air bubbles. Conventionally, as a method for removing air bubbles in a viscous material (defoaming), it is common to create a vacuum state in a filling device and then stir the material. However, simply filling the viscous material while stirring under vacuum will not work.
It was difficult to sufficiently remove air bubbles present in the highly viscous viscous material.

In response to the above problem, the inventors of the present invention have carefully studied the defoaming effect of viscous material under vacuum, and have determined that the flow of the viscous material should be raised and lowered so that all the viscous material inside the container rises uniformly to near the liquid surface. The inventors discovered that the above-mentioned problems could be solved by performing such stirring, and came to propose the present invention.

That is, the present invention is a viscous defoaming container in which a stirrer having a rotating shaft that moves up and down while rotating is attached inside the vacuum container.

Hereinafter, the present invention will be explained in detail based on the drawings.

Figure 1 shows a typical viscous defoaming container of the present invention.
FIG. 2 is a schematic diagram illustrating an example. That is, the defoaming container of the present invention comprises a vacuum container 1 and a stirrer 3 having a specific structure for stirring the viscous material 2 within the container 1. The container of the present invention is generally preferably used as a viscous filling device, as shown in FIG. is attached. In a filling device using such a defoaming container, first, the inside of the vacuum container 1 is brought into a vacuum state by a vacuum means 5 such as a vacuum pump connected to the vacuum container 1, and then the stirrer 3 is operated, and then the filling is performed. By opening the valve 6 at the bottom of the outlet 4 with the container installed at the bottom of the outlet 4, a certain amount of viscous material is filled.

As mentioned above, the feature of the present invention is that by using a stirrer 3 having a specific structure, that is, a stirrer having a rotating shaft (stirring shaft) 7 that moves up and down and rotates under vacuum, The aim is to move the flow of the viscous material 2 up and down to enhance the defoaming effect.

Conventionally, for example, as shown in FIG. 3, a rotating shaft 7 with a spiral blade 8 connected to the tip, or as shown in FIGS. 4 and 5 (a plan view of FIG. 4),
A rotary shaft 7 to which a plate-like blade 8 is connected diagonally downward at the tip thereof, and further, as shown in FIGS. There is a method in which the viscous material 2 is stirred by a stirrer 3 having a rotating shaft 7 to which blades 8 curved along the axis are connected. In particular, with a stirrer having blades 8 as shown in FIG. 5, it is possible to give a certain degree of upward flow to the viscous material 2, but the stirring effect of the present invention is achieved simply by installing the rotating shaft 7 at a fixed position and rotating it. You can't get it just by letting it happen. It is also possible to stir at an ultra-high speed, but in this method, the rotating shaft 7
It is not practical because the blades 8 are severely worn and a high-torque motor is required.

In contrast, the present invention uses the stirrer 3 having a structure in which the rotary shaft 7 moves up and down while rotating, so all of the above-mentioned problems can be solved, and the degassing effect under vacuum is extremely high.

Any known method can be used without particular limitation as to the method of vertically moving the rotating shaft 7. For example, as shown in Fig. 2, the main body of the agitator 3 is connected to a cylinder 9 placed on the ceiling, and the agitator 3 is moved up and down by the vertical movement of the cylinder 9, or as shown in Fig. 1, it is rotated. A threaded part 10 is provided in the middle part of the shaft 7,
There are methods of changing the height (vertical movement) and rotational direction of the rotating shaft 7 by changing the rotating direction of the agitator 3, and methods of vertically and rotationally moving the rotating shaft 7 using a plurality of motors. .

Although the shape of the vacuum container 1 used in the present invention is not particularly limited, generally a container with a cone-shaped bottom and a cylindrical portion as shown in FIG.
It is preferably used because it is easy to rotate and the flow of the viscous material 2 is smooth.

The stirrer 3 used in the present invention generally includes a rotating shaft 7 and a rotating shaft 7, except for the case shown in FIG.
Any structure can be used without any particular restriction as long as it consists of a motor that rotates a rotary shaft 7 and a blade 8 is connected to the tip of the rotary shaft 7. The shape of the blade 8 is not particularly limited, but it is best to have a shape that moves along the inner wall within 20 mm of the side inner wall of the vacuum vessel 1, and whose cross-sectional diameter is 1/2 to 1/4 of the inner diameter of the vacuum vessel 1. In this case, the viscous substance 2 adheres well to the blade 8 and moves up and down, and when the rotating shaft is rotated, it passes through most of the cross section, so the degassing effect is good. Although one blade 8 may be used, it is preferable to use two or more blades from the viewpoint of mechanical balance.

The vertical movement distance of the rotating shaft 7 is required to be such that the viscous material at the bottom of the vacuum container 1 is lifted close to the liquid level of the viscous material. The vertical movement speed is 0.1 to 50 times/minute, and
The rotation speed is preferably about 0.1 to 50 rpm. Further, the degree of vacuum varies depending on the type of viscous material, but is generally 100 mmHg or less, and preferably 10 mmHg or less.

In addition, the materials of the parts constituting the vacuum container 1 and the stirrer 3 may be any material as long as it has corrosion resistance and wear resistance in a viscous body, and metals, glass resins, or lining materials thereof are generally used. Further, the rotating shaft 7 and the vacuum container 1 may be airtight by using an O-ring, an oil seal, a gland packing, or the like.

As described above, the present invention is characterized in that the agitator 3 of a specific structure is provided in the vacuum container 1, and the container is preferably used as a filling device. At this time, there are no particular restrictions on the container to be filled or the filling method, but as shown in Figure 8, a certain amount is filled from the bottom of the vacuum container 1 by applying gas pressure without stirring. Filling the container 11 is preferable because it eliminates the need for transferring from the vacuum container 1 to another large container, reduces the amount remaining in the vacuum container 1, and prevents air bubbles from being mixed in during transfer.

When filling the filling container 11 with a fixed weight of viscous material 2, the filling container 11 is generally placed above the weighing scale 12, and the valve 6 is opened for a certain period of time while measuring the weight. At this time, the viscous material 2 enters the filling device 11 while folding over itself, which is undesirable because it contains air bubbles again. In order to prevent this, it is preferable to place the filling container 11 under vacuum (vacuum atmosphere chamber 13) and fill the container while measuring the weight in vacuum. In addition, in order to increase the accuracy of the filling amount, it is better to fill in small amounts, but it takes time to fill. On the other hand, if you try to shorten the time, the filling accuracy will not improve. To prevent this, it is generally common practice to provide large and small valves for control, but the amount remaining in the valves poses a problem. Therefore, a control valve (an automatic type is preferable, and a diaphragm valve or a pinch valve is preferable when abrasive particles are included) is used as the valve 6.
While measuring the filling amount, first widen the valve opening, then decrease the valve opening as you approach the desired filling amount. Cut the dripping viscous flow with a thread or cutter just before the desired filling amount. Filling accuracy can be improved by filling the container. This is because during filling, since the viscosity is high, it is necessary to perform predictive control because the weight is measured while hanging from the outlet of the valve. The valve 6 can be controlled by a controller 14. In addition, there are no particular restrictions on the type of viscous material.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a viscous defoaming container of the present invention. 3, 4, and 6 are schematic diagrams of the rotating shaft, and FIG. 5 is a plan view of FIG. 4, and
FIG. 7 shows a plan view of FIG. 6, respectively. Also, the second
8 and 8 are schematic diagrams showing another embodiment of the present invention. In the figure, 1 is a vacuum container, 2 is a viscous material, 3 is a stirrer, 4 is an outlet, 5 is a vacuum means, 6 is a valve,
7 is the rotating shaft, 8 is the blade, 9 is the cylinder, 10
11 is a filling container, 12 is a weighing meter, 13 is a vacuum atmosphere chamber, and 14 is a control meter 14.

Claims (1)

[Scope of utility model registration request] A viscous defoaming container with a stirrer inside the vacuum container that moves up and down while rotating.