JPH0739740A - Paddle of mixer - Google Patents

Abstract

PURPOSE:To provide the paddle of a mixer which prevents the mixture from containing bubbles that are generated by agitating. CONSTITUTION:The body 4 of a paddle is constituted of the horizontal base 1, agitation posts 2, 2 raised in both ends thereof and a connection supporter 3 raised in the center. Length between the outer ends of both agitation posts 2, 2 is 180mm and height of both agitation posts 2, 2 is 90mm and thickness thereof is 8mm. The cross section of the connection supporter 3 raised in the center is a square of 8X8mm. The lower end of the vertical pipe part 5a at one side of a supporting pipe 5 is combined with the upper of the connection supporter 3. The supporting pipe 5 is constituted of two pieces of long and short vertical pipe parts 5a, 5b and a horizontal pipe part 5c connecting the interval between the upper ends thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a paddle body inserted from above to place a container containing a liquid, powder or other material to be mixed on a turntable and rotate the container. The present invention relates to a paddle of a mixer that stirs and mixes materials to be mixed in a container.

[0002]

2. Description of the Related Art Conventionally, the paddle of this type of mixer has a paddle body consisting of a horizontally long horizontal base, a stirring column raised at both ends of the paddle, and a connecting post raised in the center, and an upper end of the central connecting post. It is a combined support member and a support member for disposing the paddle body in the mixer.

The above-mentioned support member is usually formed in a substantially inverted U-shape which is composed of two vertical pipe portions and a horizontal pipe portion connecting the upper ends thereof. One of the two vertical pipe parts is configured in common with the connecting column of the paddle body, or one of the two vertical pipe parts is configured to be shorter than the other vertical pipe part, whichever is shorter. There is also one in which the lower end of the vertical pipe part is joined to the upper end of the connecting column of the paddle body. In any case, the connecting column has a circular cross section or an elliptical cross section, whether it is formed alone or in common with the vertical pipe portion of the support member. There is something.

As described above, in the paddle of this type of mixer, the paddle body is loaded into the container in a mountain-shaped state, the container is rotated, and thus the material to be mixed such as liquid in the container is rotated. Therefore, the stirring and mixing operation is performed by using both stirring columns as the main stirring means. However, according to the observation of the present inventor, it is recognized that bubbles are mixed due to the connecting column during the stirring operation. It was That is, when the container is rotated, the mixed material is
As the container rotates, it will rotate and flow, and both the stirring columns will collide with the connecting columns and be agitated. At this time, it was confirmed that air bubbles were mixed from around the connecting columns. It is a thing.

As described above, the paddles of these mixers are used when agitating and mixing various liquids and the like, and in the special case where the material to be mixed needs to be foamed during agitating and mixing. However, in most cases, it is expected that the materials to be mixed are uniformly mixed without foaming.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention, however, to provide a paddle for a mixer which does not mix air bubbles into the material to be mixed during the stirring and mixing operation.

[0007]

The gist of the constitution of the present invention is to provide a paddle body consisting of a horizontally long horizontal base portion, a stirring column that is raised at both ends thereof, and a connection column that is raised at the center.
In a paddle of a mixer, which is a support member coupled to the upper end of a central connecting column, and a supporting member for disposing a paddle body in the mixer, the connecting column has a cross section of This is a paddle of a mixer configured to have a quadrilateral shape, which can solve the above problems.

As described above, the connecting column is not limited to a particular one as long as its cross section is a quadrangle. For example, the cross section can be configured in a regular quadrilateral or can be configured in a rhombus. Furthermore, it is better to be as thin as possible if the required strength can be secured, but the size does not matter so much.

The material of the paddle body is not limited to a particular material, but it is preferable that the material to be mixed does not easily adhere to the paddle body.
Further, it is desired that the chemical resistance is good. For example, polytetrafluoroethylene or the like can be adopted.
In the case of using such a plastic, a paddle body composed of a horizontal base, a stirring column raised at both ends thereof, and a connecting column raised at the center can be integrally formed or cut out from a plate material. .

[0010]

Since the present invention is constructed as described above, it can be used as follows. Similar to the paddle of a conventional mixer. First of all, on the turntable of the mixer,
Set a container containing liquid, powder or other materials to be mixed.

On the other hand, the paddle body is set in the mixer via the support member. When the support member is a pipe member having a substantially inverted U shape composed of two vertical pipe portions and a horizontal pipe portion connecting the upper ends thereof, as in the conventional example, the upper surface corner of the mixer is The paddle body is set by mounting one of the vertical pipes of the support member on a support shaft that is provided upright in the section. The paddle body is inserted into the container when the exterior of the vertical pipe portion is lowered.

After preparing in this way, the mixer is driven,
When the turntable is rotated, the container is rotated accordingly, and the paddle body performs the stirring and mixing operation of the materials to be mixed in the container. When the container is rotated, the material to be mixed rotates and flows in the container following the rotation and collides with both the stirring columns as well as the connection columns to be stirred. At this time, in the present invention, as described above, since the connecting strut is configured so that its cross section becomes a quadrangle, the side corresponding to the downstream side of the flow of the mixed material in the periphery of the connecting strut. However, a deep groove-shaped space, etc., which is observed in the conventional connecting post having a circular or elliptical cross section, does not occur. Therefore, naturally, due to this, air bubbles due to the drawing of air are generated. Mixing is no longer recognized.

That is, the material to be mixed which is flowing is divided into two by the connecting support, respectively flows along the side surface of the connecting support, and joins again on the downstream side. As described above, when the connecting strut has a quadrangular cross section, the merging does not occur at the side surface of the connecting strut, but at any of the downstream ridge (corner) positions determined by the ambient conditions. Therefore, the formation of the deep groove and the like can be avoided, and as a result, it is possible to prevent bubbles from being mixed into the material to be mixed.

When the cross section of the connecting column is circular or elliptical, a deep groove-like space is always generated immediately after the portion facing the downstream side, and air bubbles are mixed into the material to be mixed. It seems that if the cross section is triangular, it will work, but
Since the flow of the mixed material in the container is not simple, the divided mixed material does not merge at the downstream ridge (corner), but merges at the side surface. This will cause the inclusion of air bubbles. If the cross section is a pentagon or more polygon, it will be close to a circle or an ellipse,
Phenomena similar to them occur.

In addition, in the case of a connecting pillar having a quadrangular cross section, the flowing mixed material will flow into and collide with the side surface of the connecting pillar, so that the resistance is large and there is no place to escape. It is also considered that there is a tendency to bulge slightly upward at the position and that air is not drawn in.
If the connecting column has a circular or elliptical cross section, the material to be mixed will flow and collide not with the surface but with the line, so the resistance will be small and the downward drawing will occur, and this will also mix in the air. It seems to be done.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the paddle body 4 is composed of a horizontally long horizontal base portion 1, stirrer columns 2 and 2 standing up at both ends thereof, and a connecting column 3 standing up in the center. The paddle body 4 is formed by cutting a plastic plate material, and the length between the outer ends of the stirring columns 2 and 180 is 180 mm, the height of the stirring columns 2 and 90 is 90 mm, and the thickness is 8 mm. . The cross-section of the connecting column 3 standing up in the center is a square of 8 × 8 mm. The lower end of one of the vertical pipe portions 5a of the support pipe 5, which is a support member, is coupled to the upper end of the connection column 3. The support pipe 5 is composed of two long and short vertical pipe portions 5a and 5b and a horizontal pipe portion 5c connecting the upper ends thereof.

Therefore, the paddle of the mixer of the above embodiment can be used exactly like the paddle of the conventional mixer. As shown in FIG. 2, the container 8 containing the material to be mixed is placed on the turntable 7 of the mixer 6, and the paddle of the mixer of this embodiment is set in the mixer 6.
A vertical pipe portion 5b on the open side of the support pipe 5 is rotatably mounted on a support shaft 9 provided upright at a corner of an upper surface of the mixer 6, and the paddle body 4 is placed in a material to be mixed in a container 8. Sink into.

With this preparation, the mixer 6 is driven,
When the turntable 7 is rotated, the container 8 is rotated accordingly, and the materials to be mixed are stirred and mixed by the stirring columns 2 and 2 of the paddle body 4. The operation is similar to the conventional one. At this time, as described above, the agitating action is also performed by the central connecting column 3, but in this embodiment,
As described above, since the connecting column 3 is configured to have a square cross section, it is necessary to avoid the phenomenon that bubbles are mixed in the material to be mixed around the connecting column 3. You can The mechanism is as described above.

Next, a second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, a horizontally long horizontal base 11
The paddle body 14 is composed of the stirring columns 12 and 12 which are erected on both ends thereof, and the connection column 13 which is erected in the center and has a rhombic cross section.
Make up. The paddle body 14 is formed by cutting a plastic plate material, except for the connection columns 13. The length between the outer ends of the two stirring columns 12 and 180 is 180 mm, and the height of the two stirring columns 12 and 12 is 180 mm. Is 90 mm and the thickness is 8 mm.
The connecting column 13 which is erected in the center has a rhombus of its cross section having a diagonal length of 8 × 8 mm. The lower end of one vertical pipe portion 15a of the support pipe 15 which is exactly the same as that of the first embodiment is coupled to the upper end of the connecting column 13. The support pipe 15 is composed of two long and short vertical pipe portions 15a and 15b and a horizontal pipe portion 15c connecting the upper ends thereof.

Therefore, the paddle of the mixer of the second embodiment described above can be used in the same manner as in the first embodiment. Further, the connection column 13 operates similarly to the connection column 3 of the first embodiment.

Next, the test results of the paddles of the mixers of the above first and second embodiments will be shown together with the test results of a conventional product which will be described later as a comparative example. As a comparative example, as shown in FIG. 4, the horizontal base and the stirring column were the same as those in the first and second examples, and the conventional products in which only the connection columns were different were used. This conventional connecting column has an elliptical cross section with a long diameter of 21 mm and a short diameter of 8 mm.

The test method was as follows: 4 liters of sealing material (Hamatite SC500: Yokohama Rubber Co., Ltd. (5-36-11 Shinbashi, Minato-ku, Tokyo) (polysulfide type)) as a material to be mixed was placed in the container 8. Then, a color master (gray) and a curing agent were added thereto, and the paddles of the mixers of the first and second embodiments and the mixing of the conventional product were sequentially used by using the mixer 6 described in the first embodiment. Mix using the machine paddle. Mixing was performed with the container 8 open and the mixing environment temperature being 0 ° C. As a result, all the sealing materials were not sufficiently mixed after 3 minutes had elapsed from the start of mixing, but after 10 minutes, all were sufficiently homogeneous with no mixing unevenness.

The state of inclusion of air bubbles in each of the above mixed sealing materials was observed as follows. Fill each caulking gun with each sealing material, place the 1st and 3rd ones on the joint of width 25mm, depth 12mm, length 1000mm, and carry out spatula only once on the surface,
After curing at an ambient temperature of ° C, the number of bubbles having a diameter of 1 mm or more observed on the surface, that is, the surface of the joint, was examined. In addition, inside the joint, that is, in this case, the sealing material placed in the joint was sliced to a half thickness, and the number of bubbles of the same size observed on the sliced surface was examined. The results are shown in Table 1. The second and fourth pieces are also placed on the same joints, but after the surface is not spatula-finished and the beads are likewise cured at an ambient temperature of 0 ° C., the surface, that is, the joint surface. The number of observed bubbles having a diameter of 1 mm or more was examined. In addition, inside the joint, that is, in this case, the sealing material placed in the joint was sliced to a half thickness, and the number of bubbles of the same size observed on the sliced surface was examined. The results are shown in Table 2, respectively. Table 3 shows the results obtained by summing the numbers of bubbles having a diameter of 1 mm or more observed above and in each of the sealing materials.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

From the above test results, first, regarding the mixing performance, the paddles of the mixers of the first and second embodiments obtained extremely good mixing results without unevenness even in a temperature environment assuming winter. The construction of the connecting struts 3, 13 to prevent the inclusion of air bubbles does not appear to affect the mixing performance.

From the above test results, it can be seen that the paddles of the mixers of the first and second embodiments are clearly superior to the conventional products in terms of the performance of preventing bubble inclusion. On the other hand, it can be judged that there is no significant difference between the paddles of the mixers of the first embodiment and the second embodiment.

[0029]

When the paddle of the mixer of the present invention is used to mix the material to be mixed such as the sealing material, the inclusion of air bubbles can be reduced to an extremely small level. Therefore, when the material to be mixed is, for example, the above-mentioned sealing material or paint, it is possible to avoid the occurrence of pit-like defects and crater-like defects on the surfaces of the materials that have been cast or applied. With respect to the other mixed materials, by preventing air bubbles from being mixed, advantages corresponding to their properties can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a paddle of a mixer according to a first embodiment.

FIG. 2 is a schematic side view showing the mixer with the paddle of the mixer of the first embodiment set.

FIG. 3 is a schematic perspective view showing a paddle of the mixer of the second embodiment.

FIG. 4 is a schematic perspective view showing a paddle of a conventional mixer.

[Explanation of symbols]

 1 Horizontal Base 2 Stirring Column 3 Connection Strut 4 Paddle Body 5 Support Pipe 5a Vertical Pipe Section 5b Vertical Pipe Section 5c Horizontal Pipe Section 6 Mixer 7 Turntable 8 Container 9 Support Shaft 11 Horizontal Base 12 Stirring Column 13 Connection Strut 14 Paddle Body 15 Support Pipe 15a Vertical Pipe Section 15b Vertical Pipe Section 15c Horizontal Pipe Section

Claims (3)

[Claims] 1. A mixer comprising: a horizontally long horizontal base, a paddle body composed of a stirring column erected at both ends thereof and a connecting column erected in the center, and a supporting member coupled to an upper end of the central connecting column, which is used in a mixer. A paddle of a mixer comprising a paddle body and a supporting member for disposing the paddle body, wherein the connecting column has a quadrilateral cross section. 2. A paddle for a mixer according to claim 1, wherein the cross section of the connection column is formed into a regular quadrangle. 3. The paddle for a mixer according to claim 1, wherein the connecting post has a rhombic cross section.