JPH1043566A - Kneading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively agitate and defoam materials to be kneaded in a kneading vessel and to effectively knead the materials which are subjected to a centrifugal sepn. effect and largely vary in the sp. gr. by novel agitating means to each other. SOLUTION: A revolving shaft 3a drive by a revolution driving motor 3 is provided with a rotating body 4. The centrifugal side of this rotating body 4 is provided with a vessel holder 6 for holding the kneading vessel 5 by inclining inside at approximately 45 deg.. This vessel holder 6 is drive to be rotated by a rotation driving motor 8. Agitating vanes 10 are inserted into the rotating kneading vessel 5 and the materials 13 to be kneaded in the kneading vessel 5 are agitated by these agitating vanes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a solder paste, a dental impression material, a fat, a resin, a dye, a pigment, a powder, a filler or the like, or a composite material of a molten resin and a powder or a filler, a short fiber or the like. The present invention relates to a kneading apparatus for performing stirring, kneading, and the like of a material having fluidity.

[0002]

2. Description of the Related Art A kneading container configured to revolve a kneading container containing a material to be kneaded, such as a solder paste or a dental impression material, around its axis parallel to the revolving axis while revolving around the orbit. The device is conventionally used. In this type of kneading apparatus, a centrifugal force acts on the kneaded material in the kneading container due to the revolution of the kneading container, and the kneaded material is pressed against the inner wall of the container by the centrifugal force. Air bubbles contained in the material are released to the outside, and the material to be kneaded in the container is stirred and kneaded by the rotation of the kneading container.

[0003] An apparatus for manufacturing a casting material disclosed in Japanese Patent Application Laid-Open No. 61-290946 is a planetary gear device in which a revolution shaft is driven by an electric motor and the driving force of the motor is provided on the revolution shaft. This is transmitted to a kneading container mounted on the tip of the rotating arm via the rotating arm, and the kneading container is configured to rotate.

In this kneading apparatus, since the rotation axis of the kneading vessel is inclined by about 45 ° to the revolving axis, the pressing force due to the centrifugal force acts on the inclined inner wall of the kneading vessel, and the component force of the pressing force is kneaded. It works below the inner wall of the container. Accordingly, the stirring and defoaming of the material to be kneaded are promoted in combination with the acting force due to the rotation of the kneading container.

[0005] In addition, in an apparatus for mixing impression materials disclosed in Japanese Utility Model Publication No. 5-32110, a universal joint is connected to the tip of a revolving shaft driven by a belt from the outside, and the center of the shaft is set to about 4 mm.
Tilted at an angle of 5 °, and through a driven belt at the tip,
The cup holder rotatably supported at an angle of about 45 ° is configured to be driven to rotate.
The same operation as the kneading device shown in No. 6 can be obtained.

[0006] In the case where powder of a metal such as copper or silver is mixed into a binder of a resin liquid having a relatively high viscosity by using the above-described kneading apparatus, for example, even when the stirring is completed, the metal powder is mixed. The powder may condense on the bottom of the container.
This is thought to be due to the fact that the specific gravity of the binder and that of the metal powder are significantly different, and the centrifugal force of the revolution causes a strong centrifugal separation effect, resulting in such a phenomenon.

[0007]

Problems to be Solved by the Invention
In No. 0946 and No. 5-32110,
As a drive mechanism for revolving and rotating the kneading container,
The revolving force is extracted from one drive motor, and the kneading container attached to the rotating end of the rotating body is rotated from the revolving shaft via a planetary gear or a transmission belt.

However, in either case, the specific gravity of the materials to be kneaded is greatly different from each other, so that the centrifugal action that occurs cannot be prevented.

Accordingly, an object of the present invention is to efficiently mix and knead a fluid material to be kneaded in a kneading vessel and to knead a plurality of kinds of materials to be kneaded having different specific gravities. It is an object of the present invention to provide a kneading apparatus that can effectively perform kneading while preventing centrifugal separation.

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 is provided on a rotating body attached to a revolving shaft, and revolves around the revolving shaft. On the other hand, in a kneading device including a container holder that rotates around an axis whose upper part is inclined to the revolving shaft side and a kneading container having a bottomed cylindrical shape held by the container holder, the rotating body includes the kneading container. A stirring blade is provided which is inserted from above into the kneading container so as to be able to be taken in and out.

According to the above construction, the bubbles contained in the material to be kneaded are discharged in the centrifugal direction by the action of the revolution and the rotation, and the defoaming is performed extremely effectively. Since it is inserted, even when a plurality of types of kneaded materials having greatly different specific gravities are kneaded, centrifugal separation can be prevented by forcibly stirring and kneading them. Therefore, kneading can be uniformly performed as a whole.

According to a second aspect of the present invention, in the kneading apparatus of the first aspect, the rotating body is provided with a vertical movement mechanism for vertically moving the stirring blade along the rotation axis of the container holder. Features.

According to the above configuration, the stirring blade can be moved up and down with respect to the material to be kneaded in the rotating kneading vessel by the vertical moving device. Thus, the effects of stirring and kneading can be further enhanced.

According to a third aspect of the present invention, there is provided a container holder which revolves around a revolving axis and rotates about an axis whose upper part is inclined toward the revolving axis with respect to the revolving axis, and a bottomed holder held by the container holder. In a kneading apparatus provided with a cylindrical kneading container, a bottom portion of the kneading container is inclined at a predetermined angle with respect to a rotation axis.

According to the above configuration, since the bottom of the kneading container is inclined with respect to the axis of rotation of the container holder, the kneading container held by the container holder rotates vertically, causing a vertical flow in the material to be kneaded. Thereby, the vector of the centrifugal force generated by the rotation and the revolution is partially changed to an upward vector by the inclined bottom surface of the container, and the flow becomes a convective flow. Therefore, since the kneaded materials can be effectively stirred and kneaded, even when mixing and kneading a plurality of types of kneaded materials having greatly different specific gravities, their centrifugal separation action is prevented. It can be uniformly kneaded.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments included in the present invention will be described.

[0017]

1 to 3 show a first embodiment of the present invention. FIG. 1 is a schematic front sectional view showing an internal structure of a kneading apparatus, and FIG. 2 is a kneading container of the kneading apparatus. FIG. 3 is a front sectional view showing the mounting structure, and FIG. 3 is a perspective view of a main part showing a blade shape of the stirring blade.

Referring first to FIG. 1, the kneading apparatus has a main body container 1 and a support plate 2 elastically supported in the main body container 1 via a plurality of springs 1a. A revolving drive motor 3 is attached to a lower surface of the support plate 2, and a revolving shaft 3 a connected to a motor shaft of the revolving drive motor 3 protrudes and extends above the support plate 2. A rotating body 4 is provided at the upper end of the revolution shaft 3a. Although not shown, it is preferable that the revolution drive motor 3 is elastically supported on the bottom of the main body container 1 via a buffer member such as a vibration-proof rubber or an air damper (not shown). Further, it is preferable that the revolution drive motor 3 is composed of a servomotor.

The rotating body 4 is a revolving shaft 3a of the revolving drive motor 3.
Is fixed at an angle of approximately 45 ° and obliquely upward, and a cylindrical kneading vessel 5 with a bottom is provided on the centrifugal side of the rotating body 4.
Is provided. More specifically, in the illustrated embodiment, the rotation support shaft 7 is provided on the rotating body 4 such that the upper part of the rotation support shaft 7 is substantially 4 ° toward the axis of the revolving shaft 3a.
The container holder 6 is rotatably attached to the rotation support shaft 7 via a bearing 7a. The kneading vessel 5 is not limited to a cylindrical one, and may be, for example, one having an elliptical cross section or a polygonal cross section. In the vicinity of the upper end of the revolving shaft 3a, a rotating drive motor 8 for rotating the kneading vessel 5 is provided on the rotating body 4.
Is attached. The rotation drive motor 8 is inclined 45 ° with respect to the rotating body 4 so as to be parallel to the container holder 6.
And the rotation drive shaft 8a
A pulley 8b is attached to the end of the pulley. The transmission belt 9 wound around the pulley 8b is extended along the rotating body 4 and wound around a pulley portion 6a provided integrally with the container holder 6.

A rubber sheet 6b is provided on the inner bottom of the container holder 6, and the kneading container 5 is held in the container holder 6 with the rubber sheet 6b joined to the bottom. The container holder 6 is provided with a holder roller 6c which is in contact with the lower outer peripheral surface of the kneading container 5, and the kneading container 5 is configured to be held substantially coaxially in the container holder 6 by the holder roller 6c. I have.

The rotating body 4 is provided with a stirring blade 10 inserted into the kneading vessel 5. As shown in FIG. 3, the stirring blade 10 is formed in a single blade shape and has a support rod 10.
It is fixed to the lower end of a and is configured to move up and down in the kneading container 5 that rotates.

The vertical movement mechanism 11 of the stirring blade 10 is constructed, for example, as follows.

The lower frame 11a of the vertical movement mechanism 11 has a mounting portion extending above the rotation driving motor 8 of the rotating body 4.
The upper and lower drive motor 11b is attached to the lower part of the lower frame 11a. On the upper side of the lower frame 11a, a guide rail 11c that is inclined at about 45 ° parallel to the kneading container 5 is provided upright.
An upper frame 11d is connected to the upper end of the frame c.

A feed screw 11e parallel to the guide rail 11c is rotatably supported between the lower frame 11a and the upper frame 11d. The rotating shaft of the vertical drive motor 11b is connected to the lower end of the feed screw 11e. The vertical drive motor 11b is preferably a pulse motor, and is driven to rotate forward and backward by receiving a control signal.

A base end of a vertically moving arm 12 is screwed into the middle of the feed screw 11e.
The vertical movement arm 12 is configured to move up and down in response to the forward / reverse drive of b. A guide rail 11c penetrates slidably in the middle of the vertically movable arm 12, so that the rotation of the vertically movable arm 12 is suppressed.

The upper end of a support rod 10a is detachably connected to the tip of the vertical movement arm 12, and the stirring blade 10 is moved up and down along the rotation axis of the container holder 6 according to the vertical movement of the vertical movement arm 12. It is configured to: Since the stirring blade 10 can be retracted above the kneading container 5, the kneading container 5 can be easily removed from the container holder 6.

The shape of the stirring blade 10 and the structure of the vertical movement mechanism 11 are not limited to the above embodiment. The stirring blade 10 may include, for example, a plurality of screw-shaped blade pieces to generate a convective flow. Further, the stirring blade 10 itself may be configured to rotate in a direction opposite to the rotation of the kneading container 5 to promote stirring. The vertical movement mechanism 11 is provided with upper and lower sprockets and pulleys, and the vertical movement arm 12 is connected to a middle part of a chain or a belt stretched over the sprockets and pulleys. It may be configured such that the rolled support bar 10a is moved up and down.

The kneading container 5 revolves around the revolving shaft 3a while revolving, so that the kneaded material 13 inside the kneading container 5 is subjected to centrifugal force due to revolving and centrifugal force due to rotation. Since the centrifugal force due to the revolution is larger than the centrifugal force due to the rotation, the material 13 to be kneaded in the kneading container 5 is mainly pressed against the inner peripheral wall of the kneading container 5 by the centrifugal force due to the revolution of the kneading container 5. Thereby, the release of the bubbles existing in the kneaded material 13 is promoted. Further, since the direction of action of the centrifugal force due to the rotation always changes in each direction with respect to the direction of action of the centrifugal force due to the revolution of the kneading vessel 5, the kneading of the kneaded material 13 in the kneading vessel 5 by stirring is promoted.

Further, the stirring blade 1 is placed in the rotating kneading vessel 5.
0, the stirring action in the kneading vessel 5 is promoted. However, when the stirring blade 10 is moved up and down in the kneading vessel 5, the stirring is more forcibly promoted, so that several kinds of kneading with greatly different specific gravities are performed. Even in the case of mixing and kneading the sum material 13, the centrifugal separation action can be effectively suppressed, and kneading with extremely high uniformity can be performed.

Further, when a servomotor is used in controlling the revolution driving motor 3 and the rotation driving motor 8 described above, more ideal rotation control becomes possible, and a previously programmed kneading process and the like can be performed. Can be accurately reproduced.

In order to change the control of the revolution and rotation of the kneading container 5 and the up and down movement of the stirring blade 10 as necessary, the operator himself / herself can change the rotation speed of each motor, start and stop operations according to time. Is performed each time, or it is necessary to provide a microcomputer or the like to automatically control each motor according to a program input in advance.

The kneading apparatus 1 described in the above embodiment is provided with one kneading vessel 5, a rotation driving motor 8 and one stirring blade 10 attached thereto. It is also possible to provide two or more, and it is desirable to provide a plurality of them in order to properly secure the balance of rotation.

FIGS. 4 and 5 show a second embodiment of the present invention. FIG. 4 is a schematic longitudinal sectional front view of a kneading apparatus.
FIG. 5 is an operation explanatory view of the kneading container. In these drawings, the same components as those in the first embodiment are denoted by the same reference numerals. In addition, in FIG.
, B indicates the orbit of the revolution, and C indicates the axis of rotation.

In the second embodiment, the bottom 5a of the kneading container 5 is inclined at a predetermined angle θ (for example, 10 °) with respect to its rotation axis, that is, the rotation axis of the container holder 6.
Therefore, when the kneading container 5 is driven to rotate, a movement occurs in which the left and right sides of the inclined bottom portion 5a swing up and down.

Therefore, centrifugal force is applied to the kneaded material 13 by revolving the kneading container 5 in a state where the kneading container 5 is inclined at about 45 °, and the bubbles generated in the kneaded material 13 are subjected to the centrifugal force. Is released in the centrifugal direction. Further, the kneading container 5 rotates to promote the kneading of the material 13 to be kneaded. Further, by receiving the pseudo vertical movement of the inclined bottom portion 5a generated by the rotation of the kneading container 5, even when several kinds of kneaded materials 13 having greatly different specific gravities are mixed, their centrifugal separation action is generated. And kneading can be performed effectively. Therefore, uniform kneading can be achieved.

In the above embodiment, one kneading vessel 5 is provided, but the present invention is not limited to this, and two or more kneading vessels can be provided. It is desirable to provide a plurality of kneading containers 5 also. Although not shown in FIG. 4, in the case of one kneading container 5, a balancer for maintaining rotational balance is provided on the opposite side with respect to the revolving shaft.

[0037]

As described above, according to the present invention, stirring and kneading of a fluid kneading material in a kneading vessel can be effectively performed, and plural kinds of materials having greatly different specific gravities can be obtained. It is possible to provide a kneading apparatus capable of effectively kneading even when mixing and kneading. .

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional front view of a kneading apparatus showing a first embodiment of the present invention.

FIG. 2 is an enlarged front sectional view showing the mounting structure of the kneading container of the embodiment of FIG. 1;

FIG. 3 is a perspective view showing a shape of a stirring blade of the embodiment of FIG. 1; .

FIG. 4 is a schematic longitudinal sectional front view of a kneading apparatus showing a second embodiment of the present invention.

FIG. 5 is an operation explanatory view of the kneading container of Embodiment 2 of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 kneading device 3 revolving drive motor 3a revolving shaft 4 rotating body 5 kneading container 5a inclined bottom surface 6 container holder 8 rotation driving motor 10 stirring blade 10a support rod 11 vertical movement mechanism 11b vertical drive motor 11e feed screw 12 vertical arm 13 kneading Japanese material

Claims (3)

[Claims] A container holder provided on a rotating body attached to a revolving shaft for revolving around the revolving shaft and rotating around an axis whose upper part is inclined toward the revolving shaft with respect to the revolving shaft; A kneading apparatus having a bottomed cylindrical kneading container held by a container holder, wherein the rotating body is provided with a stirring blade inserted so as to be able to be taken in and out of the kneading container from above the kneading container. Characteristic kneading device. 2. The kneading apparatus according to claim 1, wherein the rotating body is provided with a vertical movement mechanism for vertically moving the stirring blade along the rotation axis of the container holder. 3. A container holder that revolves around an orbital axis and rotates about an axis whose upper part is inclined toward the orbital axis with respect to the orbital axis, and a bottomed cylindrical kneading container held by the container holder. Wherein the bottom portion of the kneading container is inclined at a predetermined angle with respect to the rotation axis.