JP2010125661A - Kneading machine and kneading method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open-type kneading machine and a kneading method using the same capable of efficiently kneading a kneading material stored in a kneading tank, and capable of preventing the increase of manufacturing cost and a device configuration of the kneading machine. <P>SOLUTION: The open-type kneading machine 100, having rotors 3, 4 disposed in parallel at a bottom part in the kneading tank 1, is equipped with a rotating means for rotating the rotors 3, 4 at a different rotating speed to each other, and the inner wall surface 10 of the kneading tank 1 has circular arc shaped circular arc parts 1a, 1b along the rotational trajectory of the rotors 3, 4. The circular arc part angle β at the side where the rotor 4 having slow rotating speed is formed to become large with respect to the circular arc part angle α at the side where the rotor 3 having fast rotating speed among the rotors 3, 4 regarding the circular arc part angle from the horizontal direction including the rotating axis centers 3a, 4a to the upper end part of the circular arc part around the rotating axis centers 3a, 4a of the rotors 3, 4 in a kneading attitude of the kneading tank 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a kneading machine and a kneading method using the kneading machine, and more particularly to an open kneading machine suitable for kneading a relatively low viscosity and low elasticity material such as rubber, resin, silicon material, and the like. The kneading method.

  Conventionally, as a kneader for kneading a kneaded material accommodated in a kneading tank, for example, a pressure-type kneader and an open-type kneader have been proposed (for example, see Patent Document 1).

  The pressure-type kneader rotates a rotor disposed at the bottom of the kneading tank while positively applying external pressure to the kneading material from above in the kneading tank containing the kneading material. It is a kneader for kneading. Since this pressure-type kneader can be kneaded under pressure, it can efficiently knead a material having a relatively high viscosity and high elasticity. However, a drive mechanism for moving the pressurizing means up and down is required, and because of this drive mechanism, when the inside of the kneading tank is sealed and used in a vacuum state or a reduced pressure state, it is necessary to employ a separate large-scale sealing mechanism. There is a problem that the manufacturing cost and the apparatus configuration increase.

On the other hand, the open type kneader is arranged at the bottom of the kneading tank in a state where the upper side of the kneading material accommodated in the kneading tank is opened, that is, without positively pressurizing the kneading material by the pressurizing means. And a kneading machine for kneading the kneaded material by rotating the rotor. In this open type kneader, the above drive mechanism is not necessary, and even when used in a vacuum state, the upper opening of the kneading tank only needs to be sealed with a sealing lid, and an increase in production cost and apparatus configuration can be prevented. There are advantages.
Since the above open type kneader performs kneading without directly pressing the kneaded material, it is often used when kneading a material with relatively low viscosity and low elasticity. For example, as shown in FIG. A kneading tank 51 that contains the kneading material and a pair of rotors 52 and 53 provided in parallel at the bottom of the kneading tank 51 are configured. Then, as shown in FIG. 7A, when kneading the kneaded material stored in the kneading tank 51, the kneading posture for kneading the kneaded material with the opening 54 of the kneading tank 51 directed vertically upward. , The rotors 52 and 53 (rotor blades 55 and 56) are rotated in mutually different rotation directions (for example, the rotor 52 is rotated clockwise and the rotor 53 is rotated counterclockwise). Next, as shown in FIG. 7 (b), when kneading is completed, the kneaded material that has been kneaded in an inverted orientation in which the kneading tank 51 is inverted with the rotational axis 52a of the rotor 52 as the rotational axis for posture change. Is discharged from the kneading tank 51 to the outside.

JP-A-7-124941

However, in the open type kneader, since the kneaded material is not kneaded under pressure unlike the pressure type kneader, the kneaded material is used as a rotor in a state where the fluidity of the kneaded material is poor as in the initial stage of kneading. The rotor blades 55 and 56 of the 52 and 53 cannot be sufficiently engaged, and the kneaded material stays on the upper portions of the rotors 52 and 53 (above the rotation trajectory of the rotor blades 55 and 56). There is a problem that it takes time.
As the kneaded material is kneaded, the rotor blades 55 and 56 cause the kneaded material to spring up along the inner wall surface of the kneading tank 51, and the vertical portion of the inner wall surface where the rotor blades 55 and 56 do not reach. The adhering kneaded material tends to be insufficiently kneaded (see FIG. 7A).
In such an open-type kneader, a pressing member (not shown) capable of pressing a part of the kneading material while securing a sealed state in the kneading tank 51 with a sealing lid is provided in the kneading tank 51. It is also conceivable to provide the inner side wall so as to be slidable in the vertical direction. However, when such a pressing member is provided, there is a problem that the manufacturing cost increases.

  The object of the present invention is to efficiently knead the kneaded material accommodated in the kneading tank in view of the problems of the conventional kneaders described above, and to prevent an increase in the manufacturing cost and apparatus configuration of the kneader. An object of the present invention is to provide an open type kneader and a kneading method using the same.

In order to achieve the above object, an open type kneader according to the present invention includes a kneading tank that contains a kneaded material therein, and a pair of rotors that are arranged in parallel at the bottom of the kneading tank and knead the kneaded material. An open-type kneader equipped with
The first characteristic configuration includes rotating means for rotating the pair of rotors at different rotational speeds,
In the kneading posture in which the inner wall surface of the kneading tank has an arc-shaped arc portion along the rotation trajectory of the rotor, and the kneading material is kneaded with the opening of the kneading tank directed vertically upward, the rotor An arc portion on the side where a rotor having a high rotational speed is disposed among the pair of rotors with respect to an arc portion angle which is an angle from a horizontal direction including the rotation axis to an upper end portion of the arc portion around the rotation axis This is because the angle of the arc portion on the side where the rotor having a low rotation speed is arranged is larger than the angle.

According to the above characteristic configuration, in an open type kneader in which the kneading material is not positively pressurized by the pressurizing means, the rotational speeds of the pair of rotors provided at the bottom of the kneading tank by the rotating means are set at different rotational speeds. While rotating, the arc shape in both arc portions near the bottom in the kneading tank is appropriately formed so as to correspond to the difference in rotation speed, so that the kneading material accommodated in the kneading tank can be kneaded efficiently. At the same time, it is possible to prevent an increase in manufacturing cost and apparatus configuration of the kneader.
That is, when the pair of rotors are rotated at different rotational speeds, the kneaded material accommodated in the kneading tank is pushed from the rotor with a high rotational speed into the rotor with a low rotational speed, so that a circulating flow is easily generated and the fluidity is improved. Can be made.
In addition, the arc portion angle on the inner wall surface of the kneading tank on the side where the rotor with the lower rotation speed is larger than the arc portion angle on the inner wall surface of the kneading tank on the side where the rotor with the higher rotation speed is arranged. Thus, the circular arc shape of both circular arc parts in the bottom part vicinity in a kneading tank is formed. Therefore, the kneading material is subjected to a shearing force between the rotor and the arc portion on the inner wall surface of the kneading tank, and the kneading proceeds. Therefore, the kneading efficiency can be improved by increasing the length of the arc portion and increasing the distance to which the shearing force is applied (increasing the area). On the other hand, since the fluidity of the kneaded material is poor at the initial stage of kneading, the above-described circulation flow is unlikely to occur, and the kneaded material tends to stay in a raised state on the upper part of the rotor having a low rotation speed. Even in such a case, by increasing the length of the arc portion on the side where the rotor having a low rotational speed is arranged, the kneaded material can be guided from the rotor having the low rotational speed to the fast rotor, and the rotational speed of the kneaded material is reduced. It is possible to improve the fluidity by suppressing staying in the upper part of the slow rotor.
Further, as the kneading progresses, it is considered that the kneaded material is spun up to the vertical part on the inner wall surface of the kneading tank and adheres to the vertical part due to the rotation of the rotor. The momentum is weak and it is easy to adhere. In this case, a kneading failure of the kneaded material remaining on the rotor side having a low rotation speed may occur. However, such a problem also occurs in the inner wall surface on the side where the rotor having a low rotation speed is arranged as described above. Since the length of the arc portion is long, the jumping of the kneaded material by the rotor with the slow rotation speed is hindered by the arc portion of the inner wall surface at the top of the rotor, and as a result, the rotor with the low rotation speed is arranged. The kneading material adhering to the vertical portion on the inner wall surface on the side of the slab is reliably reduced, and the occurrence of kneading failure can be prevented.
Here, the arc portion angle means a horizontal direction (inner wall surface) including the rotation axis around the rotation axis of the rotor in a kneading posture in which the kneading material is kneaded with the opening of the kneading tank facing vertically upward. The angle from the base end portion of the arc portion) to the upper end portion of the arc portion formed in an arc shape, and is defined for each of the rotation axis of the pair of rotors. For example, as shown in FIG. 3, the rotation axes 3a and 4a of the pair of rotors 3 and 4 are defined as a first arc portion angle α and a second arc portion angle β, respectively. The first arc portion angle α is, for example, a cross section perpendicular to the rotation axis 3a of the rotor 3, and the horizontal direction including the rotation axis 3a (the first arc of the inner wall surface 10) about the rotation axis 3a. It can also be defined as an angle from the first base end portion A1) of the portion 1a to the first upper end portion B1 of the first arc portion 1a. The second arc portion angle β is, for example, a cross section perpendicular to the rotation axis 4a of the rotor 4, and the horizontal direction including the rotation axis 4a (the second arc portion of the inner wall surface 10) about the rotation axis 4a. It can also be defined as the angle from the second base end portion A2) in 1b to the second upper end portion B2 of the second arc portion 1b.
Further, the kneading machine is not configured to positively pressurize the kneaded material by the pressurizing means, and thus is an open type kneader that does not need to be provided with a driving device for the pressurizing means. Since there is no need to provide a pressing member or the like that positively presses the kneaded material, the manufacturing cost can be reduced and the apparatus configuration can be made compact.
Therefore, the kneading material accommodated in the kneading tank can be efficiently kneaded, and the production cost of the kneader and the increase in the apparatus configuration can be prevented.

  A second characteristic configuration of the open-type kneader according to the present invention is such that the kneading tank is configured to be reversible with the rotation axis of one of the pair of rotors as a rotation axis for changing the posture, and the rotation speed The arc portion on the side where the fast rotor is disposed is arranged so as to be on the lower side in an inverted posture in which the kneading tank is inverted.

  According to the above characteristic configuration, the kneaded material can be discharged to the outside from the opening formed in the kneading tank in an inverted posture in which the kneading tank is inverted when kneading is completed. Further, the arc portion of the kneading tank on the side where the rotor having a high rotational speed is arranged in the inverted posture, that is, the arc portion on the side with a small arc portion angle is the lower side in the vertical direction. Even when the wall surface is formed in an arc shape, the kneaded material is easily discharged along the inner wall surface on the side where the arc portion angle is small, and the kneaded material can be prevented from remaining as much as possible. In addition, if the arc portion angle is large, it tends to be a blind spot during cleaning, but it is preferable to reduce the arc portion angle on the lower side in the vertical direction in the inverted posture in consideration of the discharge of the kneaded material.

  A third characteristic configuration of the open-type kneader according to the present invention is such that the rotation shaft cores of the pair of rotors are arranged at positions shifted in the vertical direction, and the rotation shaft core of the slow rotation rotor has the rotation speed. It exists in the point arrange | positioned above the rotating shaft center of a quick rotor.

  According to the above characteristic configuration, the rotor having a higher rotational speed than the rotor having the lower rotational speed among the rotational shaft cores of the pair of rotors is disposed on the lower side. Thus, the kneaded material can be reliably collected, and the kneading efficiency can be further improved. For example, even when the kneaded material stays on the upper part of the rotor on the slow rotation side, the kneaded material is well guided to the lower rotor side where the rotation speed is high due to the influence of gravity. Thus, kneading can be performed more rapidly.

  In order to achieve the above object, the first characteristic means of the kneading method according to the present invention is characterized in that the open kneader according to any one of the first to third characteristic configurations is used to put the kneading tank in the kneading posture. After storing the kneaded material, the rotational speed of the rotor disposed on the side with the smaller arc portion angle is made faster than the rotational speed of the rotor disposed on the side with the larger arc portion angle, and the kneaded material is kneaded. There is in point to do.

  According to the above characteristic means, it is possible to efficiently knead the kneaded material accommodated in the kneading tank while obtaining the same effects as the effects described in the first to third characteristic configurations.

Hereinafter, an embodiment of an open kneader according to the present invention will be described with reference to the drawings. First, the basic configuration of an open type kneader will be described.
FIGS. 1A to 1C are conceptual diagrams showing a schematic configuration of an open type kneader and a kneading method of a kneading material according to the present invention, and FIG. FIG. 2B is a front sectional view of the kneading tank in the direction of arrow IIb in FIG. 3A is a side sectional view of the kneading tank in the kneading posture, and FIG. 3B is a side sectional view of the kneading tank in the inverted posture.

As shown in FIGS. 1 and 2, an open-type kneader 100 includes a kneading tank 1 that contains a kneading material W therein and a frame (not shown) that can support the kneading tank 1. 2, a pair of first rotor 3 and second rotor 4 arranged in parallel at the bottom of the kneading tank 1 and kneading the kneaded material W, and the opening 5 formed vertically above the kneading tank 1 are hermetically closed. The sealing lid 6 is configured to include rotation means 9 that can rotate the first rotor 3 and the second rotor 4 at different rotational speeds.
The open type kneader 100 kneads the kneaded material W in a state where the upper side of the kneaded material W accommodated in the kneading tank 1 is opened, that is, without positively pressurizing the kneaded material W by the pressurizing means. It is a kneading machine which performs. The kneading material W can be exemplified by materials having relatively low viscosity and low elasticity such as rubber, resin, silicon material, etc., but when kneading is performed without positively pressing the kneading material W However, there is no particular limitation as long as the material can be sufficiently kneaded.

  As will be described in detail later, as shown in FIG. 1, when the kneaded material W is kneaded using an open kneader 100, the sealing lid 6 is opened and the kneaded material W is put into the kneading tank 1. (See FIG. 1A), the kneading material W accommodated in the kneading tank 1 is kneaded by rotating the first rotor 3 and the second rotor 4 with the sealing lid 6 closed. (See FIG. 1B). When the kneading is completed, the kneading tank 1 is reversed (oscillated and rotated) with the rotation axis 3a of the first rotor 3 as the rotation shaft for changing the posture, and the kneaded material W after the kneading is externally transferred from the kneading tank 1 to the outside. (See FIG. 1C).

  As shown in FIG. 2 (a), the kneading tank 1 has a vertical cross section (side cross section) viewed from the side and is generally bottomed and has an opening 5 on the vertical upper side. Is configured to do. The kneaded material W can be charged and discharged from the opening 5. And the 1st rotor 3 and the 2nd rotor 4 which are mentioned later are arrange | positioned at the bottom part of the kneading tank 1 in the form in which each rotating shaft core 3a and rotating shaft core 4a are parallel.

  The kneading machine body 2 includes a frame (not shown) that can support the kneading tank 1, and can hold the kneading tank 1 in a kneading posture in which the kneading material W is kneaded with the opening 5 directed vertically upward. (See FIGS. 1 (a) and 1 (b)), the rotary shaft core 3a of the first rotor 3 is swung from the kneading posture to a reversing posture in a state of being reversed (oscillating rotation). In this inverted posture, the posture can be maintained (see FIG. 1C). The kneader main body 2 includes a swinging mechanism (not shown) that can be opened and closed by swinging and rotating a sealing lid 6 to be described later by a swinging shaft H.

As shown in FIGS. 2 and 3, the first rotor 3 has a rotor blade 31 that can rotate by drawing a predetermined rotation locus (a dashed line in FIG. 3A) on a rotor that can rotate around the rotation axis 3 a. It is configured with. Similarly, the second rotor 4 is configured to include a rotor blade 41 that can rotate on a rotor that can rotate around the rotation axis 4a by drawing a predetermined rotation locus (a chain line in FIG. 3A). . As shown in FIGS. 2A and 3A, the first rotor 3 and the second rotor 4 have the same rotating shaft cores 3a and 4a in parallel at the bottom of the kneading tank 1. It arrange | positions so that it may become parallel on a horizontal surface. Further, as shown in FIG. 2 (b), the first rotor 3 and the second rotor 4 are in a partial cross section (front partial cross section) viewed from the front, on the shaft end side of the first and second rotors 3 and 4. It arrange | positions so that the tank side wall part 1e of the kneading tank 1 may be penetrated.
Further, the first rotor 3 and the second rotor 4 are configured to be rotatable at different rotational speeds by a rotating means 9 described later, and as indicated by arrows in FIGS. 2 (a) and 3 (a), The first rotor 3 is configured to rotate clockwise at a high rotational speed, and the second rotor 4 is configured to rotate counterclockwise at a low speed.

  The sealing lid 6 is formed in a substantially inverted dish shape, and is configured so that the opening 5 of the kneading tank 1 can be closed and sealed from above. A viewing window 7 is formed on the top of the sealing lid 6 so that the inside of the sealed kneading tank 1 can be observed. In addition, by configuring the viewing window 7 so as to be openable and closable, it can also be used as a material inlet for introducing the kneaded material W into the kneading tank 1. By doing in this way, even if it does not open and close the sealing lid 6, the kneading | mixing material W can be thrown into the inside of the kneading tank 1 simply. In addition, a connecting portion 8 to which piping of a vacuum pump (not shown) can be connected is provided at the upper central portion of the sealing lid 6, and the internal pressure of the kneading tank 1 is reduced by the vacuum pump. It is configured to be possible. As shown in FIG. 1, the sealing lid 6 is configured to be able to swing and rotate on a swing shaft H by a swing mechanism (not shown) provided in the kneader body 2 to open and close. Has been.

  The rotating means 9 is configured to be able to rotate the first rotor 3 and the second rotor 4 at different rotational speeds. In this embodiment, the rotating means 9 is a rotational drive of a motor (not shown). Force is transmitted to the first rotor 3 and the second rotor 4 via gears (not shown) having different gear ratios, and the first rotor 3 and the second rotor 4 can be rotated at different rotational speeds. It is constituted by a gear mechanism. In addition, this gear mechanism is provided with the transmission part which can change a gear ratio, and can also be comprised so that the rotational speed of the 1st rotor 3 and the 2nd rotor 4 can each be changed by this transmission part.

Next, a characteristic configuration of the open type kneader 100 according to the present invention will be described.
As shown in FIG. 3A, the kneading tank 1 is formed in a bottomed cylindrical shape in a kneading posture and has an opening 5 formed vertically upward, but the first rotor 3 and the second rotor 4 are arranged. The shape near the bottom is characteristically formed. That is, the inner wall surface 10 of the kneading tank 1 is formed in an arc shape (first shape) along the rotation locus of the rotor blades 31 and 41 of the first rotor 3 and the second rotor 4 in the vicinity of the bottom of the kneading tank 1. The circular arc portion 1a and the second circular arc portion 1b) and vertical portions (the first vertical portion 1c and the second vertical portion 1d) above the circular arc portion are formed.

  Specifically, as shown in FIG. 3A, the shape of the inner wall surface 10 of the kneading tank 1 near the bottom where the first rotor 3 is arranged is the rotation locus of the rotor blades 31 of the first rotor 3. Is formed as a first arc portion 1a having an arc shape along the line. Of the first arc portion 1a, around the rotation axis 3a of the first rotor 3, the horizontal direction including the rotation axis 3a (the first arc portion 1a where the horizontal line in the horizontal direction intersects the first arc portion 1a). The angle from the first base end portion A1) to the first upper end portion B1 of the first arc portion 1a is the first arc portion angle α. The first arc portion angle α is, for example, a cross section perpendicular to the rotation axis 3 a of the rotor 3, and the horizontal direction including the rotation axis 3 a centered on the rotation axis 3 a (the horizontal line in the horizontal direction). Can be defined as an angle from the first base end portion A1 in the first arc portion 1a where the first arc portion 1a intersects to the first upper end portion B1 of the first arc portion 1a formed in an arc shape.

  3A, the shape of the inner wall surface 10 of the kneading tank 1 in the vicinity of the bottom where the second rotor 4 is disposed follows the rotation trajectory of the rotor blades 41 of the second rotor 4. It is formed as an arc-shaped second arc portion 1b. Of the second arc portion 1b, around the rotation axis 4a of the second rotor 4, the horizontal direction including the rotation axis 4a (the second arc portion 1b where the horizontal line in the horizontal direction intersects the second arc portion 1b). The angle from the second base end portion A2) to the second upper end portion B2 of the second arc portion 1b is the second arc portion angle β. Note that the second arc portion angle β is, for example, a cross section perpendicular to the rotational axis 4a of the rotor 4, and the horizontal direction including the rotational axis 4a around the rotational axis 4a (the horizontal line in the horizontal direction) It can also be defined as an angle from the second base end portion A2) in the second arc portion 1b where the second arc portion 1b intersects to the second upper end portion B2 of the second arc portion 1b formed in an arc shape.

  Further, as shown in FIG. 3 (a), the inner wall surface 10 of the kneading tank 1 is vertically formed above the first arc portion 1a, that is, above the first upper end B1. One vertical portion 1c is formed. Moreover, the 2nd perpendicular | vertical part 1d formed perpendicularly | vertically is formed in the inner wall surface 10 of the kneading tank 1 above the 2nd circular arc part 1b, ie, above 2nd upper end part B2.

  Therefore, the rotor blades 31 of the first rotor 3 and the rotor blades 41 of the second rotor 4 are related to the first arc portion 1a and the second arc portion 1b that are arc portions of the kneading tank 1, in particular, the first arc portion. A shearing force can be applied to the kneaded material W even in relation to the arc portion having the first arc portion angle α of 1a and the arc portion having the second arc portion angle β of the second arc portion 1b. The kneading can be efficiently performed. In the conventional open type kneader, as shown in FIG. 7, the vertical portion 57 of the inner wall surface of the kneading tank 51 does not have an arc-shaped arc portion for kneading the kneaded material W, and the present invention relates to this application. The arc part angle γ corresponding to the first arc part angle α and the second arc part angle β is both 0 degrees, and in the kneading tank 51, the rotation axis 52 a of the first rotor 52 and the rotation axis of the second rotor 53. The shearing force can be applied only on the inner wall surface below the portion where the horizontal line including 53a and the vertical portion 57 of the inner wall surface of the kneading tank 51 intersect.

  In addition, in the present application, as shown in FIG. 3A, in the kneading tank 1, the second arc portion angle β in the second arc portion 1 b on the second rotor 4 side is on the first rotor 3 side. The first arc portion 1a is formed to be larger than the first arc portion angle α. For example, the first arc portion angle α in FIG. 3A is set to 30 degrees, and the second arc portion angle β is set to 60 degrees. Then, the rotation means 9 sets the rotation speed of the first rotor 3 arranged on the side with the smaller arc portion angle to be faster than the rotation speed of the second rotor 4 arranged on the side with the larger arc portion angle. ing. As shown in FIG. 3 (a), the rotation directions of the rotors rotate in different directions so that the first rotor 3 is in the clockwise direction and the second rotor 4 is in the counterclockwise direction. Is set.

Therefore, the length of the first arc portion 1a and the second arc portion 1b on the inner wall surface 10 of the kneading tank 1 is increased, and the distance at which the shearing force can be applied in the first rotor 3 and the second rotor 4 is increased as much as possible ( By increasing the area, the kneading efficiency can be further improved than before. On the other hand, since the fluidity of the kneaded material W is poor at the initial stage of kneading, the kneaded material W tends to stay in a raised state on the upper portion of the second rotor 4 having a low rotation speed. Even in such a case, by making the length of the second arc portion 1b on the side where the second rotor 4 having a low rotation speed is arranged longer than the length of the first arc portion 1a, the second rotor 4 having a low rotation speed can be used. The kneaded material W can be guided to the fast first rotor 3, and the kneaded material W can be prevented from staying in the upper portion of the second rotor 4 having a low rotation speed, thereby improving the fluidity. Further, as the kneading progresses, the kneading material W is spun up to the first vertical portion 1c and the second vertical portion 1d in the inner wall surface 10 of the kneading tank 1 by the rotation of the first rotor 3 and the second rotor 4, and the first rotor 3 and the second rotor 4 rotate. It is conceivable to adhere to the vertical part 1c and the second vertical part 1d. In particular, the second rotor 4 having a low rotation speed has a weak momentum and is more likely to adhere. In this case, a kneading failure of the kneaded material W on the second rotor 4 side where the rotational speed is slow may occur. However, such a problem also occurs on the side where the second rotor 4 where the rotational speed is slow is arranged. Since the length of the second arc portion 1b of the tank 1 is long, the jumping of the kneaded material W by the second rotor 4 having a slow rotation speed is caused by the second arc portion 1b in the upper portion of the second rotor 4. As a result, the kneading material W adhering to the second vertical portion 1d on the side where the second rotor 4 having a low rotation speed is disposed is surely reduced, and the occurrence of kneading failure can be prevented. In addition, the kneading machine 100 is not configured to positively pressurize the kneading material W by the pressurizing means, and thus is an open-type kneader 100 that does not need to be provided with a driving device for the pressurizing means. Since there is no need to provide a pressing member or the like that positively presses the kneaded material W in the mold kneader 100, the manufacturing cost can be reduced and the apparatus configuration can be made compact.
Therefore, the kneading material W accommodated in the kneading tank 1 can be efficiently kneaded, and the production cost and apparatus configuration of the kneader 100 can be prevented from increasing.

  Also, as shown in FIG. 3B, the kneading tank 1 is reversed (oscillated and rotated) with the rotation axis 3a of the first rotor 3 as a rotation shaft for changing the posture, as described above, The first arc portion 1a on the side where the first rotor 3 having a high rotational speed is disposed is formed so as to be on the lower side in the inverted posture. That is, in the inverted posture, the first arc portion 1a on the side with the smaller arc portion angle (first arc portion angle α) is formed on the lower side. Therefore, in the case where the vicinity of the bottom of the kneading tank 1 has an arc shape up to the first arc portion angle α in the first arc portion 1a and the second arc portion angle β in the second arc portion 1b. However, the kneaded material W is easily discharged along the first arc portion 1a on the side where the arc portion angle is small, and the residual kneaded material W can be eliminated as much as possible. In addition, if the arc portion angle is large, it tends to be a blind spot during cleaning, but it is preferable to reduce the first arc portion angle α on the lower side in the vertical direction in the inverted posture in consideration of the discharge of the kneaded material.

Next, a kneading method for kneading the kneaded material W using the open kneader 100 will be described.
As shown in FIG. 1, when the kneaded material W is kneaded using an open kneader 100, the sealing lid 6 is opened in the kneading posture and the kneaded material W is put into the kneading tank 1 (FIG. 1 ( a)), the first rotor 3 and the second rotor 4 are rotated by the kneading material W accommodated in the kneading tank 1 with the sealing lid 6 closed (see FIG. 1B). At this time, as shown in FIG. 3A, the rotation speed of the first rotor 3 arranged on the side of the small arc portion angle (first arc portion angle α) is large (the second arc portion). The gear ratio of the gear mechanism is set so as to be faster than the rotational speed of the second rotor 4 disposed on the angle β) side. When the kneading is completed, as shown in FIG. 3B, the kneading tank 1 is reversed (oscillated and rotated) with the rotation axis 3a of the first rotor 3 as the rotation axis for changing the posture, and the arc portion angle is set. The kneaded material W that has been kneaded is discharged from the kneading tank 1 to the outside in an inverted posture in which the first arc portion 1a disposed on the small (first arc portion angle α) side is on the lower side (FIG. 1 (c) )reference).
Therefore, as described in the above embodiment, the kneading material W accommodated in the kneading tank 1 can be efficiently kneaded, and compared with a pressure type kneader or provided with a pressing member in an open type kneader. Compared to the case, the manufacturing cost of the kneader 100 and the increase in the apparatus configuration can be prevented. Moreover, it is possible to satisfactorily prevent the kneading material W from remaining on the inner wall surface 10 of the kneading tank 1 at the time of discharging the kneading material W, and to improve the cleanability when cleaning the kneading tank 1. it can.

[Another embodiment]
(1) In the above embodiment, the inner wall surface 10 near the bottom of the kneading tank 1 itself is formed as an arcuate arc part (first arc part 1a, second arc part 1b), and the arc part is rotated at a rotational speed. The first arc portion angle α in the first arc portion 1a on the side where the first rotor 3 having a high speed is arranged is 30 degrees, and the second arc portion 1b in the side on which the second rotor 4 having a low rotation speed is arranged is second. The arc portion angle β was set to 60 degrees. However, the second arc portion angle β on the side where the second rotor 4 having a low rotation speed is arranged is larger than the first arc portion angle α on the side where the first rotor 3 having a high rotation speed is arranged. If it is formed in the above, it is not limited to the above angle. For example, as shown in FIG. 4, the first arc portion angle α of the first arc portion 11 a may be 0 degrees, and the second arc portion angle β of the second arc portion 11 b may be 90 degrees.
The first arc portion angle α and the second arc portion angle β are determined by the second rotor 4 having a low rotation speed relative to the first arc portion angle α on the side where the first rotor 3 having a high rotation speed is disposed. If the second arc portion angle β on the side to be arranged is formed to be large, it can be set to an appropriate angle in the range of 0 to 90 degrees. For example, the angle of the first arc portion angle α and the second arc portion angle β is in the range of about 0 degree <α + β ≦ 180 degrees, more preferably about 0 degree <α + β ≦ 90 degrees under the condition of α <β. Can be set appropriately.
In order to knead the kneaded material W more efficiently, for example, as shown in FIGS. 3 and 4, the rotation locus of the rotor blades 31 of the first rotor 3 and the rotation locus of the rotor blades 41 of the second rotor 4 are: The rotor blades 31 and 41 are formed to have the same diameter in a state where these rotors 3 and 4 are arranged in parallel and in parallel so that they are in contact with each other at a cross section viewed from the side (side cross section), More preferably, the first arc portion angle α and the second arc portion angle β are set to α + β = 90 degrees. By forming in this way, the delivery of the kneading material W is surely promoted from the first rotor 3 side having a high rotational speed to the second rotor 4 side having a low rotational speed, and the kneading tank 1 is provided on the second rotor 4 side. Kneading on the second rotor 4 side can be promoted by making the second arc portion 11b formed at the bottom of the inside relatively long and applying a longer shearing force. Nevertheless, the opening width of the opening 5 of the kneading tank 1 can be secured sufficiently, and the kneading material W can be easily and reliably charged and discharged.

(2) In the above embodiment, the inner wall surface 10 near the bottom of the kneading tank 1 itself is formed as an arcuate arc part (first arc part 1a, second arc part 1b), and the arc part is rotated at a rotational speed. The first arc portion angle α in the first arc portion 1a on the side where the first rotor 3 having a high speed is arranged is 30 degrees, and the second arc portion 1b in the side on which the second rotor 4 having a low rotation speed is arranged is second. The arc part angle was formed at 60 degrees. However, the second arc portion angle on the side where the second rotor 4 having a low rotation speed is arranged is larger than the first arc portion angle α on the side where the first rotor 3 having a high rotation speed is arranged. If formed, the inner wall surface 10 of the kneading tank 1 itself is not limited to the configuration in which the first arc portion 1a and the second arc portion 1b having the respective angles are formed. For example, as shown in FIG. 5, an arc-shaped arc portion formed by the inner wall surface 10 of the kneading tank 1 itself on the side where the first rotor 3 having a high rotation speed is disposed is defined as a first arc portion 12a. The arc portion angle of one arc portion 12a is α degrees (30 degrees in FIG. 5), and the arc shape arc formed by the inner wall surface 10 of the kneading tank 1 itself on the side where the second rotor 4 having a low rotation speed is disposed. The part is a second arc part 12b, and the arc part angle in the second arc part 12b is β degrees (30 degrees in FIG. 5). Then, the arc forming member 20 having a bottom surface formed in a shape along the rotation trajectory of the rotor blade 41 is fixed to the second vertical portion 12d of the kneading tank 1, and is formed by the inner wall surface 10 of the kneading tank 1 itself. The second arc portion 12b is extended by an arc-shaped portion formed on the bottom surface of the arc forming member 20. That is, the arc angle (B2 to B2) of the bottom surface of the arc forming member 20 is set to the second arc portion angle β (angle from A2 to B2) of the second arc portion 12b formed by the inner wall surface 10 of the kneading tank 1 itself. The angle obtained by adding the angle up to ', which is 30 degrees in FIG. 5, can also be the second arc part angle β ′ (corresponding to the second arc part angle β in the above embodiment, 60 degrees in FIG. 5). . As a result, the second arc portion 1b on the side where the second rotor 4 having a low rotational speed is provided near the bottom of the kneading tank 1 is made relatively long, and the second rotor 4 gives a longer shearing force for kneading. Can be promoted. In addition, since the circular arc forming member 20 is closely fixed to the side wall surface 12b of the kneading tank 1 with no gap, for example, by an adhesive or the like, it is configured not to positively press the kneading material W. .

(3) In the above embodiment, the first rotor 3 and the second rotor 4 that are arranged in parallel near the bottom of the kneading tank 1 itself are arranged in parallel on the same horizontal plane in the kneading posture. Configured to be arranged. However, the configuration is not limited to the above as long as the kneading material W can be efficiently kneaded in the second rotor 4 having a low rotation speed. For example, as shown in FIG. 6, the rotation axis 3a of the pair of first rotors 3 and the rotation axis 4a of the second rotor 4 are arranged at positions shifted in the vertical direction, and the second rotor 4 having a low rotation speed is arranged. The rotation axis 4a may be configured to be disposed at a distance X above the rotation axis 3a of the first rotor 3 having a high rotation speed. In FIG. 6, the first arc portion angle α of the first arc portion 13a on the side where the first rotor 3 having a high rotational speed is arranged is small, and the second rotor 4 on the side on which the second rotor 4 having a low rotational speed is arranged. The shape near the bottom of the kneading tank 1 is formed so that the second arc portion angle β in the two arc portions 13b becomes large. In this case, as shown in FIG. 6, when the diameters of the rotor blades 31 of the first rotor 3 and the rotor blades 41 of the second rotor 4 are formed to be L, a cross section viewed from the side (side In a state in which the rotation trajectories of the rotor blades 31 and 41 are in contact with each other in a cross section), α <β and about 0 ≦ X / L (= sin θ) ≦ 0.7 (0 ≦ θ ≦ 45 °), more preferably , Α <β, and 0 ≦ X / L (= sin θ) ≦ 0.5 (0 ≦ θ ≦ 30 °) is preferable for efficiently kneading the kneaded material W. It is. For example, in FIG. 6, the first arc portion angle α is 30 degrees and the second arc portion angle β is 60 degrees in a state where the rotation trajectories of the rotor blades 31 and 41 are in contact with each other in a cross section viewed from the side (side cross section). Yes, X / L = 0.5 and θ = 30 °. In FIG. 6, θ is an angle around the rotation axis 3 a of the first rotor 3 from the horizontal direction including the rotation axis 3 a to the rotation axis 4 a of the second rotor 4.
As a result, the first rotor 3 having a higher rotational speed than the second rotor 4 having a lower rotational speed is disposed on the lower side. Therefore, the kneading material W to be kneaded is mixed with the first rotor 3 having a high kneading efficiency and a high rotational speed. Can be reliably collected, and the kneading efficiency can be further improved. For example, even when the kneaded material W stays in a raised state on the upper portion of the second rotor 4 on the slow rotation speed side, the kneaded material W has a lower rotation speed on the lower side due to the influence of gravity. It is possible to perform kneading more quickly by being guided well by the one rotor side 3.

(4) In the above embodiment, the second arc portion angle β in the second arc portion 1b on the side where the second rotor 4 having a low rotation speed is arranged is set to the side on which the first rotor 3 having a high rotation speed is arranged. The first arc portion 1a is formed so as to be larger than the first arc portion angle α. However, the first circular arc of the first circular arc portion 1a on the side where the first rotor 3 having a low rotational speed is arranged by setting the rotational speed of the first rotor 3 to be slower than the rotational speed of the second rotor 4. The kneading tank 1 can also be formed so that the second arc portion angle β of the second arc portion 1b on the side where the second rotor 4 having a high rotation speed is arranged is smaller than the portion angle α.

(5) In the above embodiment, the sealing lid 6 that seals the opening 5 of the kneading tank 1 is provided. However, there are no problems such as scattering of the kneading material W during kneading or the need to seal the inside of the kneading tank 1. For example, the open kneader 100 can be configured without the sealing lid 6.

(6) In the above embodiment, as the rotating means 9, the rotational driving force of a motor (not shown) is transmitted to the first rotor 3 and the second rotor 4 via gears (not shown) with different gear ratios. And the gear mechanism which can rotate these 1st rotor 3 and 2nd rotor 4 at a different rotational speed was employ | adopted. However, the configuration is not particularly limited as long as the first rotor 3 and the second rotor 4 can be rotated at different rotational speeds. For example, the rotation means 9 is a known information processing means (control means) that includes a central processing unit (CPU), a memory, a storage unit, and the like, and can process information by executing a predetermined program by the CPU. A motor that drives each of the rotors 3 and 4 is provided with a control command for controlling the rotational speed (including the rotation direction) when the first rotor 3 and the second rotor 4 rotate. (Not shown) and the rotors 3 and 4 can be rotated at different rotational speeds.

  As described above, the open type kneader of the present invention has been described based on the embodiments thereof, but the present invention is not limited to the configurations described in the above embodiments, and the configurations thereof are appropriately made without departing from the spirit of the present invention. Can be changed.

  The open-type kneader of the present invention is suitable as an open-type kneader that can efficiently knead the kneaded material accommodated in the kneading tank and can prevent an increase in production cost and apparatus configuration of the kneader. Can be used.

Schematic diagram showing schematic configuration of open kneader and kneading method of kneading material according to the present invention (A) is a side sectional view around the rotation axis of the rotor of the kneading tank, (b) is a front partial sectional view of the kneading tank in the direction of arrow IIb in (a). (A) is a cross-sectional side view of the kneading tank in the kneading posture, and (b) is a cross-sectional side view of the kneading tank in the inverted posture. (A) is a side sectional view of the kneading tank in a kneading posture in an open type kneader according to another embodiment of the present invention, and (b) is a side sectional view of the kneading tank in an inverted posture. (A) is a side sectional view of the kneading tank in a kneading posture in an open type kneader according to another embodiment of the present invention, and (b) is a side sectional view of the kneading tank in an inverted posture. (A) is a side sectional view of the kneading tank in a kneading posture in an open type kneader according to another embodiment of the present invention, and (b) is a side sectional view of the kneading tank in an inverted posture. Schematic showing the schematic configuration of a conventional open-type kneader

Explanation of symbols

1 Kneading tank 1a First arc part (arc part)
1b Second arc part (arc part)
1c 1st vertical part (vertical part)
1d Second vertical part (vertical part)
3 First rotor 3a Rotational axis of the first rotor 4 Second rotor 4a Rotational axis of the second rotor 5 Opening portion 9 Rotating means 10 Inner wall surface 100 Open type kneader A1, A2 Around the rotational axis of the rotor, Intersection of the horizontal line including the axis of rotation and the inner wall of the kneading tank (base end of the inner wall in the arc)
B1, B2 Upper end of arc part W Kneading material α First arc part angle (arc part angle)
β Second arc part angle (arc part angle)

Claims (4)

An open type kneader comprising a kneading tank for storing a kneading material therein, and a pair of rotors arranged in parallel at the bottom of the kneading tank and kneading the kneading material,
Rotating means for rotating the pair of rotors at different rotational speeds,
In the kneading posture in which the inner wall surface of the kneading tank has an arc-shaped arc portion along the rotation trajectory of the rotor, and the kneading material is kneaded with the opening of the kneading tank directed vertically upward, the rotor An arc portion on the side where a rotor having a high rotational speed is disposed among the pair of rotors with respect to an arc portion angle which is an angle from a horizontal direction including the rotation axis to an upper end portion of the arc portion around the rotation axis A kneader formed such that the angle of the arc portion on the side where the rotor having a low rotation speed is arranged is larger than the angle.   The kneading tank is configured to be reversible with the rotation axis of any one of the pair of rotors as a rotation shaft for changing the posture, and the arc portion on the side where the rotor with a high rotation speed is disposed includes the kneading The kneading machine according to claim 1, wherein the kneading machine is disposed so as to be on a lower side in an inverted posture in which the tank is inverted.   The rotational axis of the pair of rotors is disposed at a position shifted in the vertical direction, and the rotational axis of the rotor having the low rotational speed is disposed above the rotational axis of the rotor having the high rotational speed. Or the kneading machine of 2.   Using the kneader according to any one of claims 1 to 3, after the kneading material is stored in the kneading tank in the kneading posture, the rotational speed of the rotor arranged on the side having the smaller arc portion angle. A kneading method in which the kneaded material is kneaded at a speed higher than the rotational speed of the rotor arranged on the larger arc portion angle side.

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