JPS59123520A - Continuous kneader - Google Patents

Abstract

PURPOSE:To provide a titled device which can perform kneading with high efficiency in a short time by forming many spiral crests which are opposite in winding direction from each other and having different numbers of lines to twin shaft rotors which are provided in a stationary vessel and rotate in the directions different from each other and disposing the same so as to mesh each other. CONSTITUTION:A continuous kneader is provided is constituted by providing rotor shafts 4A, 4B which are rotated in opposite directions by means of gears 7A, 7B meshed with each other in a stationary vessel 1 having a material feed port 2 and a material discharge port 3. Multiple spiral crests 8 which knead the material while feeding the same are formed on the parts of the rotors 4A, 4B in the vessel 1 of such kneader. The winding directions of the crests 8 are made opposite from each other and the number of said crests is different from each other, for example, three lines with the rotor 8A and four lines with the rotor 8B. The crests are meshed with each other. The rotors 9A, 9B are so constituted that, when the outside diameters of said rotors are designated respectively as D1, D2 and the distance between the shafts is designated as A, A is smaller than 1/2(D1+D2) and the ratio of the rotating angular speed between the rotors 9A, 9B is equal to the inverse number of the ratio of the above-mentioned number of crests.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a continuous kneading device that continuously kneads materials while feeding them from a supply port to a discharge port by rotating biaxial rotors in different directions within a fixed container.

<Prior art> In conventional continuous kneading equipment of this type, the distance between the two shafts of the rotor is either larger than the outer diameter of the rotor, or the distance between the shafts is smaller than the outer diameter of the rotor, so that the loci of the rotors do not match each other. Even when they intersect, the structure is such that the angular velocity of the rotor shaft and the circumferential velocity of the rotor are equal to each other. In each of the previous cases, the materials are kneaded mainly between the inner wall surface of the container and the rotor, and a relatively wide space is formed between the rotor and the rotor.
This part hardly contributed to kneading. In addition, in the case of later discussion, it is thought that the larger the part where the trajectories of the two rotors intersect, the more this part contributes to kneading. Not enough kneading was done for exercise.

<Object of the Invention> An object of the present invention is to provide a continuous kneading device in which the circumferential speeds of the rotors are relatively different in order to knead materials more fully and in a shorter time than in the past.

<Structure of the Invention> The continuous kneading device of the present invention has biaxial rotors rotating in different directions inside a fixed container, and an abrasive material input port is provided above one end of the container, and a material discharge port is provided at the other end. The device is a device in which a multi-threaded spiral mountain is formed on a biaxial rotor, the winding direction of which is opposite to each other and the number of threads on both rotors is different from each other, and the outer diameter of the biaxial rotor is set to D.
l, D2, the distance A between the axes of the two-axis rotor is 1/2 (
r)++D2), and the ratio of the rotational angular velocities of the biaxial rotor is the reciprocal of the ratio of the number of threads.

<Embodiment> FIG. 1 shows a partial sectional view of the front view of an embodiment of the present invention, FIG. 2 shows a partial sectional view of the plan view, and FIG. 3 shows a side view.

The container 1 consists of two cylinders parallel to each other and connected in the horizontal direction, with a material input port 2 opening above one end and a discharge port 3 below the other end. Two mutually parallel rotor shafts 4A, 4B pass through the two cylinders, and both ends thereof are supported by bearings 5A, 5B and 6A, 6B, which are provided at one end of the rotor shafts 4A, 4B. gear 7
A and 7B are engaged with each other and are driven to rotate in different directions by motors (not shown).

Multi-spiral crests 8 are formed on the inside of the container 1 of the rotor shafts 4A and 4B, and the ridges 8 knead the materials while transporting the materials. The number of threads is different from each other, and in the embodiment, the first rotor 9A has three threads, and the second rotor 9B has four threads.

Therefore, the cross-sectional shape of any cross section is as shown in Figure 34, with the first rotor 9A having three peaks equally spaced on the circumference and The ridges of the second rotor 9B, which has four ridges, are engaged with each other, and the second rotor 9B rotates in different directions while always maintaining this state. When the outer diameters of 9A and 9B of this biaxial rotor are DI and D2, and the distance between the shafts is A, A is smaller than 1/2 (DI + D2), and as a result, the outer diameters of both rotors are Dl and D2. trajectories intersect with each other. Also, if the diameters of the valleys formed between the peaks are dt and d2, then 1/2 (dl → -D2
) and 1/2 (DI +d2) are both slightly smaller than the distance between the axes, and as a result, opposing peaks and valleys are close to each other on the center line connecting the axes.

The helical advance angle of the rotors 9A, 9B can be changed continuously or discontinuously. In the embodiment, the advance angle is small for a while from just below the material input port 2, forming a supply section for feeding the material, and the winding direction is reversed at a point slightly past the midpoint, and the advance angle is large before and after that. , forming a kneading section for kneading the materials.

The ratio of the number of teeth between the gear 7A and the gear 7B is equal to the ratio of the threads of the rotor helix, which is 4:3 in the embodiment. the result,
The angular velocity ratio of the rotor shaft is the reciprocal of the thread number ratio, and while the rotor 9A, which has four threads, rotates 1/4, the rotor 9B, which has three threads, rotates 1/3.

The rotor shape of the present invention can be modified in various ways. For example, the phase of the helix can be advanced or retarded discontinuously, or, for example, a part or all of the peaks can be missing.

Further, the number of threads can be set at any ratio other than 3:4, such as 2:3, 2:4°, 3:5, etc.

The discharge port 3 of the present invention is provided below the other end of the rotor, and
It can also be provided at the rear end of the rotor. Moreover, other conventionally known rotors can be used in combination before and after the row and evening of the present invention.

<Effects of the Invention> According to the present invention, since the circumferential speeds of the two-shaft rotors are different, the kneading efficiency is improved compared to the conventional device in which the circumferential speeds are the same, and the same kneading effect as the conventional device can be obtained in a short time. be able to.

Therefore, the effect is particularly great when the kneading time is limited, such as in a continuous kneader.

Further, according to the present invention, the distance A between the axes of the two-shaft rotor is smaller than the sum of the radii of the rotor crests, and the outer diameter is ! Because the 1ilt traces intersect, opposing peaks and valleys are close to each other on the center line connecting the axes, and the space formed above and below the center line is on the center line. Due to the difference in the circumferential speed of both rotors, the upper space is wide and the lower space is narrow at one moment, but at the next moment the upper space is narrow. , since the lower space is widened and there is a very narrow bottleneck between the rain spaces, the material is repeatedly compressed and sheared, improving the kneading effect.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of a front view showing an embodiment of the present invention;
The figure is a partial sectional view of a plan view showing an embodiment of the present invention. FIG. 3 is a side view of the above embodiment. FIG. 4 is an explanatory diagram of the operation of the above embodiment. 1 - Fixed container 2 - Material input port 3 - Material discharge port 4, A, 4B - Rotor shaft 7A, 7B - Gears 9A, 9B - Rotor 8 - Yama Patent applicant Masao Moriyama Agent Patent attorney Nishi 1) Shin

Claims (1)

[Claims] A device in which two-shaft rotors rotate in different directions inside a fixed container, and a material input port is provided above one end of the container, and a material discharge port is provided at the other end, and the two-shaft rotors have a winding direction. Multi-spiral ridges are formed that are opposite to each other and have different numbers of threads on both rotors, and when the outer diameters of the two-shaft rotor are DI and D2, the center distance MA of the two-shaft rotor is 1/2. (DI +D2
), and the ratio of the rotational angular velocities of the two-shaft rotor is the reciprocal of the ratio of the number of threads.