JPS59124804A - Biaxial kneading device - Google Patents

Abstract

PURPOSE:To perform more sufficient and quick kneading by a method wherein on each rotor of a biaxial rotor, not only the numbers of threads but the speeds of rotation are made to differ from each other. CONSTITUTION:On each of the parallel rotors 4, 4 passing through a container 1, threads 5 of different numbers are formed, the ratio of rotation is given by the inverse number of the ratio of the numbers of the two threads 5 and these rotors are rotated in the direction opposite to each other. The sum of the distances between the two axes of rotors and the respective crests is made larger than the distance between said axes. The threads 5 can be formed spirally and in this case, angles of lead can be changed continuously and the winding directions are made opposite to each other. The phase of one rotor is deviated by a prescribed angle to one rotation of the other rotor. The clearance generated between these two rotors 4, 4 is changed remarkably for a small angle of rotation along with a quick progress of kneading. Allrition is effected at all times by the difference between the rotation speeds of these two rotors 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a two-screw kneading device suitable for kneading viscous materials such as rubber and plastics.

The kneading device, as shown in FIG.
A through hole 3.3 is provided in the container 1 to allow two rotors 4 to pass therethrough in parallel, a mound 5 for kneading is formed on the rotor 4, and bearings 6, 6 are provided on the outside of the container 1 to support the rotor 4. The rotor 4 is provided with a gear 7, a clutch gear, a transmission, etc. 8 to rotate the rotor 4, and in the case of a pressurized type, a pressurizing lid 9 is provided on the container 1 so that the rotor 4 can be rotated under pressure. The ingredients are kneaded.

In such equipment it is important that the materials are thoroughly and quickly kneaded. Conventional kneading equipment is configured to rotate two shaft rotors with the same number of peaks at the same speed, and therefore, the kneading effect such as the material grinding effect between both rotors during material kneading is not sufficient. Ta.

An object of the present invention is to provide a kneading device that can knead materials more thoroughly and quickly than conventional devices.

The basic feature of the present invention is that the number of ridges formed on each of the two-shaft rotors is different, and the rotational speed of the rotors is also different.

To explain the embodiment, a different number of ridges 5 are formed on each of the rotors 4, 4 which are arranged in parallel and pass through the inside of the container 1, and the rotation ratio of the rotors 4, 4 is set as the reciprocal of the ratio of the number of ridges 5. , the rotors 4, 4 are rotated in opposite directions. The example shown in the drawing has four peaks 5 (on the left side of the drawing)
This is a case where a structure with three peaks 5 (on the right side in the drawing) is combined. In this case, the rotation ratio of the rotor 4 provided with N11il ridges 5 and the rotor 4 provided with three ridges 5 is set to 3:4, and they are rotated in opposite directions.

The dimensions of the ridges 5 are such that the sum of the distances from the axes of both rotors 4, 4 to the tops of the ridges 5 is greater than the axial center distance of both rotors 4, 4. The width of the other ridges can be freely determined within a range where the ridges 5 of both rotors 4, 4 do not interfere when rotated at the rotation ratio specified in the present invention. The mountain 5 can be formed integrally with the rotor 4 or can be provided separately and fixed thereto. The ridges 5 are provided equidistantly in the circumferential direction in the cross-sectional shape of the rotor 4. Mountain 5 is as shown in Figure 2.
The rotor 4 may be formed in a spiral shape, and the advance angle in this case can be changed continuously or discontinuously. When the peaks 5 are formed in a spiral shape, the winding directions are opposite to each other. Furthermore, the cross-sectional shape of the ridges 5 is not limited to the simple example shown in the drawings, and the ridges 5, 5 of the left and right rotors 4
It is not necessary that they have the same cross-sectional shape.

Next, the rotation operation or state of the mountain 5 in the embodiment will be explained. The state shown in Figure 3 is the initial position, and the rotor 4 on the left side is rotated clockwise, and the rotor 4 on the right side is rotated counterclockwise. The rotation ratio in this case is 3:4. FIG. 4 shows a state in which the left rotor 4 has been rotated by 15 degrees from the initial state.

In this case, the right rotor 4 has rotated 20 degrees.

In FIG. 5, the rotor 4 on the left side is rotated 30 degrees, and the rotor 4 on the right side is rotated 40 degrees. Similarly, FIG. 6 shows the left rotor 4 rotating 45 degrees and the right rotor 4 60 degrees, and FIG. 7 shows the left rotor 4 rotating 75 degrees and the right rotor 4 rotating 100 degrees. Further, rotor 4 on the left side is 1
When rotated 5 degrees, the left rotor 4 rotates 90 degrees from the initial state, the right rotor 4 rotates 120 degrees, and returns to the third position.
The state will be as shown in the figure. As the rotor 4 continues to rotate, the rotor 4 on the left side makes one rotation, that is, rotates by 360 degrees, and during this period the rotor 4 on the right side rotates 480 degrees, returning to the same state as the initial state.

However, the rotor 4 on the right side is out of phase by 120 degrees. Note that the combination of the numbers of peaks 5 does not need to be limited to 4:3. For example, a combination such as 3:2.4:2.5:2.5:4 may be used.

As is clear from the figure, the gap formed between the two rotors 4, 4 changes significantly during a small rotation angle, and the kneading progresses rapidly. Also, since the rotation of the right rotor 4 is faster than the rotation of the left rotor 4, the difference in speed causes the grinding action of the material to be affected by lightning.

The present invention has the following configuration, in which each of the rotors is provided with a different number of ridges, and the rotational speed of the rotors is made different, so that in addition to the kneading effect due to the volume change between the two rotors as the rotors rotate, In particular, the material sloughing effect due to the rotational speed difference of the rotors is significantly improved, and the material kneading speed is improved.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing the entire device of the embodiment, Fig. 2 is a plan view of the rotor portion, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Figs. 4 to 7 are FIG. 3 is a cross-sectional view showing the state of the rotor at each position as the rotor rotates. 1... Container, 4-Rotor, 5-Mountain patent applicant
Masao Moriyama Agent Patent Attorney Nishi 1) Arata

Claims (1)

[Claims] A biaxial rotor with a plurality of ridges equally distributed in the circumferential direction in a cross-sectional shape is arranged in parallel so that the outer diameter locus overlaps each other, and the rotors are rotated in different directions. A two-shaft kneading device characterized in that the number of the ridges formed on the two-shaft rotors is made different from each other, and the rotation ratio of the two-shaft rotor is the reciprocal of the ratio of the number of the ridges. .