JPH05261725A - Kneader - Google Patents

Abstract

PURPOSE:To lower a rise in the surface temp. of a rotor shaft and prevent the stickiness of a kneading material by carving a groove in the outer periphery of the main body of the rotor shaft and fitting a sleeve to the outer periphery of the main body to form a fluid passage by both of them and allowing the terminal of the fluid passage to communicate with the fluid introducing part and fluid lead-out port provided to one end of the rotor shaft to form a cooling water reflux passage. CONSTITUTION:A fluid passage 26 is formed by the spiral groove carved in the outer periphery of the rotor shaft main body 13 in a container 11 and the sleeve fitted to the outer periphery of the main body 13 and blades 18A, 18B are welded to the sleeve. The forward passage 19 and return passage 20 of a cooling water passage are provided to the axial core part from the rotary joint 17 provided to the end of a rotor shaft to the interior of the container 11 and the communication hole 23 from the forward passage 19 to the fluid passage 21 in the blade is provided. Further, a cooling water reflux passage is formed by the communication hole 27 returning to the return passage 20 from the communicating hole 24 piercing the rotar shaft 13 through the passage 22 in the blade, a communication hole 25 and the passage 26. Therefore, the surface of the rotor shaft 13 and the blades 18A, 18B are efficiently cooled to prevent the stickness of kneaded matter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kneading machine (kneader) for kneading highly viscous materials such as plastic and rubber, and more particularly to the structure of its rotor.

[0002]

2. Description of the Related Art In a conventional rotor cooling structure, for example, as shown in FIG. 8, a cooling water passage 2 is formed in the center of a rotor shaft 1 and a cooling water passage 4 is formed inside the surface layers of blades 3a and 3b. However, both passages were in communication.

According to such a conventional technique, the surface layer of the blade is cooled well, but the surface layer of the rotor shaft not provided with the blade is far from the cooling water passage 2 of the shaft center and is not sufficiently cooled. was there.

[0004]

FIG. 9 is a view in which the inner portion of the rotor shaft 1 in the container is developed along the surface of the rotor shaft. The material travels primarily along the unbraided rotor shaft surface as indicated by the arrow. When the rotor shaft surface temperature is high, the material often sticks to the shaft surface, which hinders the movement of the material. It is more problematic after kneading than that, because the kneaded material sticks to the shaft surface and is not discharged by its own weight and must be removed manually, which requires labor and increases the batch interval time. Then, there was a problem that productivity was lowered.

The present invention provides a kneader that solves these problems.

[0006]

In the kneading machine of the present invention, a rotor shaft penetrates into a container containing the material to be kneaded, and a blade for kneading the material is formed in the inner part of the rotor shaft. In the above apparatus, a fluid passage is formed near the surface of the inner portion of the rotor shaft in the container, and the end of the fluid passage communicates with the fluid introduction port and the discharge port at one end of the rotor shaft.

The fluid passage of the present invention is preferably formed by a groove formed in the outer periphery of the rotor shaft body and a sleeve fitted to the outer periphery of the shaft body.

[0008]

Function: Cooling water is usually used as the fluid. The cooling water flows from the fluid introduction port to one end of the fluid passage, cools the rotor shaft surface layer portion while passing through the fluid passage, and returns from the other end of the fluid passage to the fluid outlet.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a partially cutaway plan view of an embodiment of the present invention. The container 11 for containing the material to be kneaded has two rotor shafts 13A. 1
3B penetrates and these rotor shafts are supported by bearings 14 and 15. One end of each of the rotor shafts 13A and 13B has a motor (not shown) via a transmission mechanism 16 such as a gear.
To drive the rotor to rotate in different directions as indicated by the arrow.
Further, in order to take out the kneaded material, one rotor shaft 13
A mechanism is provided in which the container 11 rotates about 135 ° around the center axis A along with the other rotor shaft 13B. Rotor shaft 1
3A and 13B have rotary joints 17A.
17B is provided and serves as an inlet / outlet port for cooling water.

A plurality of blades 18 ... 18 are provided in the inner portions of the rotor shafts 13A and 13B. When two blades are provided on one rotor shaft, one blade 18A extends from the container side wall 12A to the central portion, and the other 18B extends from the opposing container side wall 12B to the central portion. Both blades 18A, 18B
Coexist with each other with a phase difference of 180 °. A-A in FIG.
FIG. 3 shows a cross-sectional view, and FIG. 3 shows a vertical cross-sectional view taken along the ridgeline of the blade.

From the rotary joint 17 to the container side wall 12
Away from the A to the position slightly inside the container
A cooling water passage for the return passage 20 is provided. This way 1
9. A communication hole 23 that communicates with the fluid passage 21 in the blade is formed, and a communication hole 24 and a passage 22 that diametrically penetrate the rotor shaft 13 from the central portion of the passage 21 to the central portion of the passage 22.
A cooling water return passage is formed by a communication hole 25 communicating from the container side end to the rotor shaft fluid passage 26, a rotor shaft surface fluid passage 26, and a communication hole 27 returning from the fluid passage 26 to the return passage 20. It

The fluid passage 26 near the surface of the rotor shaft is formed by a groove formed on the outer periphery of the rotor shaft body and a sleeve fitted on the outer periphery of the shaft body. The structure of this sleeve is one in which one cylindrical sleeve 28 is fitted to the outer circumference of the rotor shaft main body as shown in FIG. 3, and two half sleeves 29A in the axial direction as shown in FIGS. 4 and 5. In some cases, 29B is covered on the outer circumference of the rotor shaft body and the divided surfaces are joined by welding. Blades 18A and 18B are welded onto the sleeve.

The shape of the groove formed on the outer periphery of the rotor shaft main body is as shown in FIG. 2 in a transverse sectional view and in FIG. 5 in a perspective view.
In addition to those formed on the entire surface of the outer periphery of the rotor shaft body where no braid is provided, a spiral shape 30 as shown in FIG. 6 and a zigzag shape 31 as shown in FIG. 7 in the axial direction. There is.

[0014]

According to the present invention, since the cooling water passes near the surface of the inner portion of the rotor shaft in the container, the surface of the rotor shaft is efficiently cooled, the temperature rise of the material is suppressed to a low level, and the material is kept after the kneading. Does not adhere to the rotor shaft, and the kneaded material can be automatically taken out. Further, since the groove is formed on the outer circumference of the rotor shaft body and then the sleeve is inserted to form the liquid passage, the one having a uniform depth from the surface of the rotor shaft to the fluid passage can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of an embodiment of the present invention.

2 is a sectional view taken along line AA of the embodiment shown in FIG.

FIG. 3 is an embodiment of the blades 18A and 18B shown in FIG.
It is a longitudinal cross-sectional view cut along the ridgeline of FIG.

FIG. 4 is a vertical cross-sectional view of a modified example of the present invention taken along the ridgeline of a blade.

FIG. 5 is an exploded perspective view of the embodiment shown in FIG.

FIG. 6 is a perspective view showing another embodiment of the fluid passage 26 of the present invention.

FIG. 7 is a perspective view showing still another embodiment of the fluid passage 26 of the present invention.

FIG. 8 is a vertical sectional view showing a conventional example.

FIG. 9 is a diagram for explaining the operation of the conventional example.

[Explanation of symbols]

11 ... Container 13A, 13B ... Rotor shaft 14, 15 ... Bearing 17A, 17B ... Fluid outlet (rotary joint) 18A, 18B Blade 19 ... Fluid outflow path 20 ... Fluid return path 21, 22 ... In-blade fluid passageway 23, 24, 25 ... Communication hole 26 ... Rotor shaft fluid passageway 27 ... Communication hole 28.・ ・ ・ Cylindrical sleeves 29A, 29B ・ ・ ・ ・ Split sleeves 30 ・ ・ ・ ・ Spiral fluid passages 31 ・ ・ ・ ・ Zigzag fluid passages

Claims (2)

[Claims] 1. An apparatus in which a rotor shaft penetrates into a container containing a material to be kneaded, and a blade for kneading the material is formed in the inner part of the rotor shaft, wherein the inner part of the rotor shaft is in the container. Fluid passage is formed near the surface of
A kneader characterized in that the end of the fluid passage communicates with a fluid inlet and outlet at one end of the rotor shaft. 2. The kneading machine according to claim 1, wherein the fluid passage is formed by a groove formed in the outer periphery of the rotor shaft main body and a sleeve fitted to the outer periphery of the shaft main body.