JP2006088527A - Method and apparatus for kneading - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kneading method which can improve productivity by shortening a kneading time and an apparatus for the method. <P>SOLUTION: The method includes a process in which in a process for kneading a material X to be kneaded added with a compounding agent while a pair of right and left non-synchronization type rotors 2 and 3 arranged in a kneading chamber 1 is rotated, the material X is kneaded while one rotor 3 is rotated oppositely. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for kneading a polymer such as rubber, and more particularly, to a kneading method and apparatus for improving productivity by reducing the kneading time.

  As a kneading apparatus for kneading a polymer such as rubber, an apparatus for kneading a polymer (a material to be kneaded) to which a compounding agent is added while rotating a pair of non-meshing left and right rotors arranged in a closed kneading chamber is well known. (For example, refer to Patent Document 1).

By the way, improvement in productivity is demanded in any industrial field, and the above-described kneading apparatus is no exception, and the kneading function to uniformly disperse the compounding agent in the polymer is efficiently exhibited and the kneading time is shortened. Therefore, it is required to increase productivity.
JP-A-5-64808

  An object of the present invention is to provide a kneading method and a kneading apparatus that can shorten the kneading time and increase the productivity.

  In the kneading method of the present invention that achieves the above object, one rotor is reversed during a step of kneading a material to be kneaded with a compounding agent while rotating a pair of non-meshing left and right rotors arranged in a kneading chamber. It has a step of kneading the material to be kneaded while rotating in the direction.

  The kneading apparatus of the present invention can rotate one rotor in the reverse direction in a kneading apparatus for kneading a material to be kneaded with a compounding agent while rotating a pair of non-meshing left and right rotors arranged in a kneading chamber. It is characterized by comprising.

  In order to efficiently disperse the compounding agent in the mixture, it is effective to change the flow of the compound during kneading with the compounding agent, but as described above, the compounding material with the compounding agent is kneaded. During the process, the kneaded material can be kneaded while rotating one rotor in the reverse direction, so that the flow of the material to be kneaded can be changed and kneaded. It becomes possible to knead while dispersing more efficiently inside. Therefore, since the material to be kneaded in which the compounding agent is uniformly dispersed can be obtained in a shorter kneading time than before, productivity can be improved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 and 2 show an embodiment of the kneading apparatus of the present invention, and a pair of non-meshing left and right rotors 2 and 3 are rotatably arranged in a kneading chamber 1 formed in a glasses-shaped cylindrical space. . Above the kneading chamber 1, a supply port 4 for supplying a polymer (a material to be kneaded) such as rubber or plastic into the kneading chamber 1 is provided. A ram 6 for sealing the kneading chamber 1 and applying pressure to the material to be kneaded is arranged in a passage 5 that communicates the supply port 4 and the kneading chamber 1 so that it can be raised and lowered by a ram cylinder 7 (see FIG. 3). Has been.

  A discharge door 8 is provided at the bottom of the kneading chamber 1 to discharge the material to be kneaded to the outside after kneading. After the kneading is completed, the latch 9 contracts to release the lock of the discharge door 8, and the discharge door 8 retreats downward and opens around the fulcrum 10 as indicated by a two-dot chain line.

  Motors (driving means) 15 and 16 are connected to rotating shafts 11 and 12 that support the rotors 2 and 3 via speed reducing means 13 and 14 having a reduction gear mechanism. The speed reduction means 13 and 14 and the motors 15 and 16 are connected to the control means 17.

  The control means 17 can switch the speed reduction means 13 and 14 according to a preset program, change the rotational speed of the rotors 2 and 3 during the kneading of the material to be kneaded, and change the rotational speed ratio. The motor 15 that rotates the rotor 2 is controlled so as to rotate the rotor 2 only in the positive direction indicated by the arrow a, while the arrow b is applied to the motor 16 that rotates the rotor 3. The rotor 3 is controlled to rotate in the forward direction and the opposite direction, and one rotor 3 can be rotated in both the forward and reverse directions.

  Hereinafter, the kneading method of the present invention using the above-described kneading apparatus will be described with reference to FIG. 3. As shown in FIG. 3 (a), the material X to be kneaded supplied from the supply port 4 to the kneading chamber 1. While pressing with the ram 6, the pair of left and right rotors 2 and 3 are kneaded while rotating in the positive direction indicated by arrows a and b. As a result, the material X to be kneaded moves downward in the center of the kneading chamber 1 and then kneaded while moving upward along the wall surfaces 1a and 1b of both chambers. During this kneading, a compounding agent is appropriately added to the material to be kneaded X from a compounding agent inlet not shown.

  After adding the compounding agent, as shown in FIG. 3B, the rotation direction of the motor 16 is switched to rotate the rotor 3 in the opposite direction, and the material X to which the compounding agent is added is kneaded for a predetermined time. As a result, the material to be kneaded X moves upward along one chamber wall surface 1a, while being kneaded while moving downward along the other chamber wall surface 1b. The frequency of rotating in the reverse direction is preferably at least once after adding the compounding agent, preferably 2 to 3 times at a predetermined interval. After kneading in the reverse direction for a predetermined time, the rotor 4 is rotated again in the forward direction.

  Further, when the rotors 2 and 3 are rotated in the forward direction, the control means 17 switches the speed reduction means 13 and 14 and changes the rotational speed ratio of the rotors 2 and 3 while adding the compounding agent for a predetermined time (about 10 seconds). The kneaded product X is kneaded. The step of kneading while changing the rotation speed ratio is preferably performed about 1 to 3 times. After completion of the kneading, the discharge door 8 is opened and the material to be kneaded X in which the compounding agent is uniformly dispersed is discharged from the kneading chamber 1.

  According to the above-described present invention, during the process of kneading the material to be kneaded X to which the compounding agent is added while rotating the pair of non-meshing left and right rotors 2 and 3 disposed in the kneading chamber 1, one rotor By providing the step of kneading the material to be kneaded X while rotating 3 in the reverse direction, it is possible to knead by changing the flow of the material to be kneaded X during kneading. It can be kneaded while being more efficiently dispersed. Therefore, the kneading time can be shortened, and productivity can be improved.

  Further, by kneading while changing the rotational speed ratio of the pair of left and right rotors 2, 3, the moving state of the material to be kneaded X can be changed, so that the compounding agent is more efficiently dispersed in the material to be kneaded X, The kneading time can be further shortened.

  In the present invention, as means for rotating the rotor 3 in the reverse direction, the rotation of the motor 16 is transmitted in the reverse direction to the rotor 3 in the speed reduction means 14 instead of the above-described configuration in which the motor 16 is rotated in the reverse direction. A mechanism may be provided.

  Further, when changing the rotational speed ratio of the pair of left and right rotors 2 and 3, the speeds of the motors 15 and 16 may be directly variably controlled instead of the speed reducing means 13 and 14 described above.

It is principal part sectional drawing which shows one Embodiment of the kneading apparatus of this invention. It is explanatory drawing which shows the drive system of the kneading apparatus of FIG. (A), (b) is explanatory drawing which shows the kneading | mixing method of this invention typically, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Kneading chamber 2,3 Rotor 4 Supply port 6 Ram 8 Discharge door 13,14 Deceleration means 15,16 Motor (drive means)
X Material to be kneaded

Claims (5)

  While rotating the pair of non-meshing left and right rotors arranged in the kneading chamber, kneading the material to be kneaded while rotating one rotor in the reverse direction during the step of kneading the material to be kneaded with the compounding agent. A kneading method having a step.   The method for kneading a material to be kneaded according to claim 1, wherein the material to be kneaded is kneaded while changing the rotation speed ratio of the pair of left and right rotors.   A kneading apparatus configured to knead an object to be kneaded to which a compounding agent is added while rotating a pair of non-meshing left and right rotors arranged in a kneading chamber, wherein one rotor can be driven to rotate in the reverse direction.   The kneading apparatus according to claim 3, wherein the pair of left and right rotors are connected to each driving means, and one driving means connected to the one rotor is configured to be rotationally driven in both forward and reverse directions. The kneading apparatus according to claim 4, wherein a speed reduction means is connected between each rotor and the drive means, and the rotational speed ratio of the pair of left and right rotors can be changed by the speed reduction means.

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