JPH0761437B2 - Batch type kneader - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a batch-type kneading machine for homogeneously mixing and kneading various kinds of materials whose properties are liquid, viscous substance or powder.

[0002]

2. Description of the Related Art As a conventional batch type kneader, one shown in FIG. 9 can be mentioned. It has two or more sets of mutually engaging lens-shaped paddles b, c arranged to rotate in the same direction in intersecting cylindrical bodies a, the rotation of these paddles b, c The inner wall of the body a and the outer surfaces of the paddles b and c are mutually scraped to perform a self-cleaning action, and the area between the adjacent paddles b and c and the inner wall of the body a occupies the material, so that the material is compressed. And expansion are repeated to mix and knead.

[0003]

However, the conventional device has the following problems. (1) In FIG. 9, when both paddles b and c are rotated in the same direction in the arrow direction (the same direction), the paddles b and b on the upper side are rotated.
The material in the space (hereinafter referred to as the material space) d filled with the material sandwiched between c and the body a moves to the left, and the material in the material space e moves to the lower left, and they pass each other. That is, even if the material in the material space d follows, the material in the material space e escapes. Similarly, on the lower side, the material in the material space f goes to the lower right, the material in the material space g goes to the right, and they pass each other. Therefore, effective kneading is not performed. (2) Since both paddles b and c rotate at a constant speed, the same material in each material space may meet each time even if both paddles rotate repeatedly, and in this respect too, kneading is sufficient. Absent. (3) Since the area change rate of the material space is small, as will be described later, this leads to inefficiency of kneading. (4) The pair of paddles b and c rotate in contact with each other due to the self-cleaning action, but the tip of one or the other paddle is always in contact with the mating paddle, so it wears as compared with other points on the outer shape of the paddle. Is big.

The present invention has been made to improve the above conventional problems, and an object thereof is to provide a batch type kneading machine capable of improving kneading efficiency and reducing paddle wear as well as self-cleaning. It is what

[0005]

In order to achieve the above object, the batch-type kneading machine of the present invention is such that the cross-sectional shape of one paddle in a cross section perpendicular to the axis of rotation is alternately and equalized by a gentle curve. The shape is made up of n (≧ 2, integer) sets of long-diameter portion and short-diameter portion at different angles, and the cross-sectional shape of the other paddle is rotated in the different directions of the rotation axis and the rotation speed ratio is the same. And the outer envelope formed by the co-rotation with the one paddle, m (≧
2, and n = m, an integer) sets of a long diameter portion and a short diameter portion.

The paddle is a flat or helical paddle.

[0007]

When the rotating shafts are rotated in different directions,
One paddle and the other paddle are in contact with each other at a point on the outer circumferences of the two paddles in such a manner that they always share a tangent line. Therefore, mutual paddle self-cleaning action is performed.
When one paddle and the other paddle are rotated in different directions and at the same speed, the tops of the long diameter portions of the one paddle are the top portions of the short diameter portion of the other paddle, or the paddles of the one paddle. The top of the short diameter portion rotates while contacting the top of the long diameter portion of the other paddle. With this rotation,
On the way, two material spaces (maximum space area) are formed in a state of being separated by each paddle and each body. Subsequently, the two material spaces are sequentially overlapped while facing each other, and finally are formed by the top portion of the long diameter portion of one paddle, the top portion of the short diameter portion of the other paddle, and the circle of the other body. Change to one narrow material space (minimum space area). After that, the material space that has been once narrowed gradually becomes wider, and then again divided into the two material spaces.

Then, as the material space changes, 2
The materials in one material space start to merge by the rotation of both paddles, and are sequentially compressed, and are largely compressed in one narrow material space. Moreover, since the materials in the two material spaces are gathered in one narrow material space while facing each other, the materials are surely mixed with each other and the chances of head-on collision are increased, and the materials are uniformly mixed.

Further, the two material spaces become substantially horizontally long (at the upper portion) as the paddles rotate, and thereafter,
The shape changes greatly into one narrow vertically oriented material space, and with this shape change, the material in the material space is largely deformed with compression. Further, since the contact points of one paddle and the other paddle constantly move, the frequency of contact between specific parts (particularly the tip end portion) of the paddle is low.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a supply port 2 at an upper end of one end,
A cylindrical body having a cross-section in which two circles of the same diameter intersect each other and having a discharge port 3 at the lower end of the other end. Rotating shafts 4 and 5 are provided in parallel within the circle of this body. A large number of paddles 6, 7 and 8, 9 are incorporated in the axial direction. Reference numeral 10 denotes a motor, which is connected to the rotary shaft 4 via a speed reducer 11. Although not shown, the other rotary shaft 5 is interlocked via the speed reducer 11. Reference numeral 12 is a heating / cooling jacket. The batch-type kneader body is constructed as described above.

Next, its detailed structure and function will be described. H
Reference numeral ₂ is a combination of flat paddles 6 and 7, which kneads and stirs the materials (for example, powder and granules and binder) supplied from the supply port 2, but the paddle itself does not function to send. H
₁ and H ₃ are helical paddles 8 and 9 arranged on both sides of H _2.
The combination of kneading and kneading and returning to the paddles 6 and 7 side with the paddle. The installation angles (θ) of the adjacent paddles 6 and 8 on the rotary shaft 4 are arranged so as to be shifted by 60 ° as shown in FIG. 2, but the invention is not necessarily limited to this, and any installation angle may be set. Can be

Next, the details of the paddles 6 and 7 will be described based on the pair of paddles shown in FIG. Paddle 6 (on one side)
Is a trilobate when its cross-sectional shape is formed by n = 3 sets of long-diameter portions and short-diameter portions alternately and at equal angles with a gentle curve. Here, 6a and 6b are the long diameter portion and the short diameter portion, and 6c and 6d are the top portion of the long diameter portion and the top portion of the short diameter portion. Further, when the radius of the major axis (major axis) of the paddle 6 is r ₁ , the radius of the minor axis (minor radius) is r ₂ and the axial distance between the rotary shafts 4 and 5 is L, the theoretical L is L = r ₁ + r ₂
Is. The (other) paddle 7 has a rotational speed ratio of n ₁ : m when the cross-sectional outer shape is the axial distance L = r ₁ + r ₂ and the rotational speeds of the rotary shafts 4 and 5 are n ₁ and m ₁ , respectively. ₁ =
By making the outer envelope curve (of the paddle 6) drawn in a plane shape that rotates in the same direction of 1: 1 and in different directions, while rotating in the direction orthogonal to the rotating shaft 5 in cooperation with the rotating shaft 5. ,
m = 3 sets of three-lobed bodies having a long diameter portion and a short diameter portion. In addition, the long diameter portion (peak portion), the short diameter portion (valley portion) of the paddle 7,
The top portion of the top and the short diameter portion of the long diameter portion 7a, 7b, and 7c and 7d, the radius of the major axis portion 7c (long radius) r When _'1, the radius of the minor axis portion 7b (short radius) r' is _2, the shaft The distance L is
L = r ₁ + r ′ ₂ . The theoretical distance L between axes is
L = r ₁ + r ₂ or L = r ₁ + r ′ ₂ , but the actual distance between the axes is slightly longer in order to provide an appropriate gap between the paddles in consideration of manufacturing errors.

Therefore, in the paddles 6 and 7, as shown in FIG. 4, the paddle 6 is 60 from the state where the top portion 6c of the long diameter portion 6a of the paddle 6 is in contact with the top portion 7d of the short diameter portion 7b of the paddle 7 (see the solid line). When rotated by °, the top 6 of the minor diameter portion 6b of the paddle 6
d is in contact with the top portion 7c of the long diameter portion 7a of the paddle 7 (see the chain double-dashed line). Needless to say, even during the rotation during this period, the paddle 8 and the paddle 9 rotate while making contact with each other at one point on the outer shape. Further, the kneading state by the pair of paddles 6 and 7 will be described based on FIG. Paddles 6,7
When the paddles are rotated in the different directions at the same rotational speed ratio set as described above, both paddles naturally rotate at the same rotational speed. Due to this rotation, the material space formed by the inner wall of the body 1 and the paddles 6 and 7 and holding the material moves with the rotation of the paddles 6 and 7 in the cross section perpendicular to the axis. The changes are shown intermittently. For convenience of description, the described material space shown by oblique lines, and the material space A ₁ of the paddles 6, as shown in FIG. 5 b,
The material spaces A ₂ of the paddles 7 are separated from each other. The two material spaces here are the sum of the spaces A ₁ and A ₂ and are the maximum.

From this state, the paddles 6 and 7 are rotated by a predetermined angle.
Material space A of paddle 6 when₁And paddle 7 material empty
Interval A₂ Fig. 5B shows the state in which the is moved. Material empty here
Interval A 2 is slightly reduced by the long diameter part 6a of the paddle 6.
It Material of paddle 6 when paddles 6 and 7 rotate further
Fee space A₁ And paddle 7 material space A₂ Move together
FIG. 5C shows the closed state. At this time, material space A₂ Hahonton
Zero and material space A₃ Becomes Paddles 6 and 7 are even better
When rotated to 90 ° (both paddles 6 and 7 are 90 ° from Fig. 5a)
Material space A of paddle 6 (rotated in the direction of the arrow)₁ And paddle 7
Material space A₂ Figure 5 shows the state in which the
Show. That is, the long diameter portion 6a, the short diameter portion 6b of the paddle 6,
Material formed by the long diameter portion 7a of the paddle 7 and the body 1
Fee space A_Four And this material space A_Four Is the smallest. This
, The material space (cross-sectional area) is due to the rotation of the paddles 6 and 7.
Therefore, A₁ + A₂→ A₃ → A_Four Changes to. here,
Limit the change in cross-sectional area occupied by each material space to one cross-section
Maximum space (see Fig. 5a) and minimum space calculated by
The cross-sectional area change rate ε (see FIG. 5D) is ε = A_Four / (A₁ 
+ A₂ ) = 1/4. In contrast, the same as before
Cross-sectional area of the method of rotating at the same speed in the same direction (see Fig. 10)
The rate of change ε ′ is ε ′ = A ′₃ / (A '₁ + A '₂ ) = 1
It is /1.5. Therefore, the present invention and the conventional example
The cross-sectional area change rate ratio E for comparison is shown below. E = ε / ε ′ = (1/4) / (1 / 1.5) = 3/8 As described above, the present invention has
It increased more than 2.6 times.

As a result, the material in the material space has a higher compressibility, the kneading effect is improved, and the materials in the two material spaces gather while facing each other. And the mixing effect is further enhanced. Further, as the paddles 6 and 7 rotate, the two material spaces A ₁ and A ₂ are oriented in a substantially horizontal direction at the upper portion as shown in FIG. As described above, the shape is largely changed (flattened) in one substantially vertically oriented material space A ₄ . Along with this change, the material in the material space undergoes large flow deformation with a large compressibility, and a remarkable kneading effect is produced.

Further, when both paddles 6 and 7 are rotated in the direction of the arrow from the state of FIG.
A minute space is formed immediately before the top 7c of the long diameter portion 7a of the paddle 7 is completely fitted into the top 6d of the short diameter portion 6b. Then, the material in the minute space is squeezed and moves violently, so that a large kneading effect is obtained.

In the above embodiment, the paddles 6 and 7 having one cross section are described. However, as shown in FIG.
Similar phenomenon occurs in 7. And the adjacent paddle 6,
Since the mounting phase of 7 is slightly different as described above,
When the material is compressed by the reduction of the material space, the material is transferred to and from the adjacent material space, and as a result, the material is moved in the arrow direction.

FIG. 6 shows a second embodiment, and the outer shape of the paddle 61 is
It is an ellipse or an ellipse having two sets of major diameter portions 61a and two pairs of minor diameter portions 61b having low peaks. The radius of the major diameter portion 61a (major radius) is r ₁ and the radius of the minor diameter portion 61b (minor radius. ) Is r ₂ . On the other hand, the paddle 71 has a rotational speed ratio n of the paddles 61 and 71.
_{With the same 1} : m ₁ = 1: 1 and the same outer envelope as in the above embodiment, a cocoon shape (a bilobed body) consisting of two sets of a long diameter portion 71a and a short diameter portion 71b is formed.

FIG. 7 shows the third embodiment, and the outer shape of the paddle 62 is
It is a deformed eyebrow shape (two-lobed body) consisting of two sets of a long diameter portion (peak portion) 62a and a short diameter portion (valley portion) 62b, and the radius (long radius) of the long diameter portion 62a is r ₁ and the short diameter portion 62b. Radius (short radius) r ₂
And On the other hand, the paddle 72 has a rotation speed ratio n ₁ : m ₁ = 1: 1 of the paddles 62 and 72, and has an outer envelope similar to that of the above embodiment, and has a long diameter portion (mountain portion) 72 a and a short diameter portion of substantially the same shape. It becomes a deformed eyebrow shape (dilobule) consisting of the part (valley) 72b.

FIG. 8 shows a fourth embodiment in which the same paddle 6 as the paddle 6 is arranged in parallel with the combination of the paddles 6 and 7 of the embodiment shown in FIG. 2 to form a triaxial type.

Further, in the above-mentioned embodiment, only the case where a plurality of raw materials are mixed has been described, but kneading accompanied by evaporation or chemical reaction may be carried out.

[0022]

Since the present invention is configured as described above, it has the following effects. One paddle and the other paddle always rotate while being in contact with each other at one point on the outer circumference, so that mutual self-cleaning action of the paddles is performed.

In one paddle and the other paddle, the apex of the long diameter portion of one paddle is the apex of the short diameter portion of the other paddle, or the apex of the short diameter portion of the one paddle is the long diameter of the other paddle. Rotate while contacting the top of the pad, and with this rotation, the two material spaces that are formed overlap while sequentially facing each other, until finally the top of the long diameter part of one paddle and the short diameter of the other paddle. The material in the two material spaces is transformed into one narrow material space formed by the top portion and the circle of the other body, and the materials in the two material spaces are successively compressed while merging into one narrow material space. Are compressed together and face each other in one narrow space, so they are uniformly mixed and kneaded reliably, and the two material spaces are oriented in a substantially horizontal direction as the paddles rotate. Greatly shape change in one narrow longitudinal direction material space, it being largely deformed. As a result, the kneading efficiency can be significantly improved.

Furthermore, since the contact points of the one paddle and the other paddle constantly move, the wear of a specific portion (particularly the tip portion) of the paddle is small.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a batch-type kneading machine according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II of FIG.

FIG. 3 is a partial perspective view showing a combined state of paddles in the embodiment.

FIG. 4 is an explanatory diagram showing a state in which a top portion of a short diameter portion of one paddle and a top portion of a long diameter portion of the other paddle are in contact with each other in the embodiment.

FIG. 5 is an explanatory diagram of a kneading state of paddles in an example.

FIG. 6 is an explanatory view showing another embodiment of the batch-type kneading machine in the present invention.

FIG. 7 is an explanatory view showing another embodiment of the batch-type kneader in the present invention.

FIG. 8 is an explanatory view showing another embodiment of the batch-type kneading machine in the present invention.

FIG. 9 is a vertical cross-sectional view of a main part of a conventional kneading machine.

FIG. 10 is an explanatory diagram of a kneading state in a conventional kneader.

[Explanation of symbols]

 4, 5 rotating shaft 6 paddle 6a long diameter part 6b short diameter part 7 paddle 7a long diameter part 7b short diameter part

Claims (1)

[Claims] 1. A body having a plurality of circles whose cross-sections intersect each other has parallel rotary shafts of the same number as the circles, and paddles meshing with each other and contacting the circle are provided on the rotary shafts. In a batch-type kneading machine in which a large number of paddles are connected, the cross-sectional shape of one paddle in a cross section perpendicular to the rotating shaft is divided by n (≧) alternately with a gentle curve at equal angles.
(2, integer) sets of a long diameter portion and a short diameter portion, and the cross-sectional shape of the other paddle is such that the rotation axis is rotated in different directions and the rotation speed ratio is the same, and the one paddle is A batch-type kneader characterized in that it has a shape consisting of m (≧ 2, and n = m, an integer) sets of a long diameter portion and a short diameter portion by an outer envelope formed by co-rotating with.