JP2013159042A - Melt kneader, and method for manufacturing blend material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a melt kneader capable of efficiently manufacturing a blend material high in dispersibility, and reducing production cost.SOLUTION: A melt kneader 10A producing a blend material by melt-kneading a blend raw material comprises: a plasticizing unit 20 having a plasticizing cylinder 21 and a plasticizing screw 22 rotationally driven in the plasticizing cylinder for plasticizing a fed blend raw material; a blend unit 30 having a blend cylinder 31 and a blend screw 32 rotationally driven in the blend cylinder for kneading the blend raw material fed from the plasticizing unit; and a discharge amount-adjusting part 34A disposed at the blend unit for adjusting a discharge amount of the blend material from the blend unit to be approximately equal to a feeding amount of the blend raw material fed to the blend unit from the plasticizing unit.

Description

  The present invention relates to a melt-kneading apparatus for producing a blend material by melt-kneading a blend raw material and a method for producing the blend material.

  A melt-kneading apparatus, which is attached to an injection molding machine or the like and plasticizes and kneads a resin, plasticizes a pellet-shaped resin material, kneads it with a screw in a cylinder, pushes it out of the cylinder and discharges it (for example, Patent Document 1).

JP 2006-240240 A

In such a screw extrusion type melt-kneading apparatus, it is always difficult to improve resin production efficiency while ensuring high resin dispersibility.
That is, if the screw rotation speed is increased in order to increase the production amount, the resin conveyance speed is increased, and the resin is conveyed to the cylinder with insufficient plasticization. Further, since the resin passes through the cylinder in a short time, it is not possible to secure a sufficient time for kneading the resin in the cylinder, and it becomes difficult to ensure high dispersibility of the resin.

Therefore, it is not easy to efficiently produce a highly dispersible blend material (kneaded resin material), resulting in an increase in production cost.
Accordingly, an object of the present invention is to provide a melt-kneading apparatus and a method for producing a blend material that can efficiently produce a blend material with high dispersibility and reduce production costs.

The present invention employs the following means in order to solve the above problems.
That is, the present invention is a melt-kneading apparatus for producing a blend material by melting and kneading a blend raw material, and has a plasticizing cylinder and a plasticizing screw that is rotationally driven in the plasticizing cylinder. A blending unit having a plasticizing unit for plasticizing the blending material, a blending cylinder, and a blending screw driven to rotate in the blending cylinder, and kneading the blending material supplied from the plasticizing unit. Provided in the unit unit and the blend unit unit, the discharge amount of the blend material from the blend unit unit is substantially equal to the supply amount of the blend raw material supplied from the plasticizing unit unit to the blend unit unit. And a discharge amount adjusting unit that adjusts as described above.

  The discharge amount adjusting unit may be replaceably attached to the blend cylinder, and may include a plurality of pipe members having a predetermined value for the diameter of the discharge port and the discharge pipe of the blend cylinder.

  The discharge amount adjusting unit is a gear pump provided at the discharge port of the blend cylinder, and the discharge amount of the blend material is substantially equal to the supply amount of the blend raw material by controlling the rotation speed of the gear pump. May be adjusted.

  According to a second aspect of the present invention, there is provided a melt-kneading apparatus comprising a plasticizing unit portion for plasticizing the charged blend raw material, and a blend unit portion for kneading the blend raw material supplied from the plasticizing unit portion. The blend material manufacturing method used includes a discharge amount of the blend material from the blend unit section and a supply amount of the blend raw material supplied from the plasticizing unit section to the blend unit section. It is characterized by adjusting as follows.

  The blend unit section includes a blend cylinder, and the discharge amount of the blend cylinder is changed so that the discharge amount of the blend material is substantially equal to the supply amount of the blend raw material. May be.

  The blend unit section includes a blend cylinder and a gear pump provided in a discharge port or a discharge pipe of the blend cylinder, and the amount of discharge of the blend material is changed by changing the rotation speed of the gear pump. You may adjust so that it may become substantially equal to the supply amount.

  According to the melt-kneading apparatus and the blend material manufacturing method of the present invention, a highly dispersible blend material can be efficiently produced, and the production cost can be reduced.

It is the perspective view and plane sectional view which show the structure of the melt-kneading apparatus which concerns on 1st embodiment. It is the perspective view and plane sectional view which show the structure of the melt-kneading apparatus which concerns on 2nd embodiment. It is a table | surface which shows the discharge | emission amount of the blend raw material in each operating condition and each condition of a plasticization unit part. It is a graph which shows the discharge amount of the blend raw material in each conditions. It is a table | surface which shows the discharge amount of the blend material in each operating condition of the blend unit part when the opening diameter of a discharge pipe line is (phi) 3 mm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge amount of the blend material in each operating condition of the blend unit part when the opening diameter of a discharge pipe line is (phi) 2 mm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operating condition of the blend unit part when the opening diameter of an exhaust pipe line is (phi) 1 mm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operating condition of a blend unit part when the opening diameter of a discharge pipe line is (phi) 6 mm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operating condition of the blend unit part when the opening diameter of a discharge pipe line is (phi) 4 mm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge amount of the blend material in each operating condition of the blend unit part when the opening diameter of a discharge pipe line is (phi) 2 mm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operating condition of each blend unit part when the rotation speed of a gear pump is 15 rpm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operation condition of the blend unit part when the rotation speed of a gear pump is 30 rpm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operation condition of the blend unit part when the rotation speed of a gear pump is 45 rpm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operation condition of the blend unit part when the rotation speed of a gear pump is 30 rpm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operation condition of the blend unit part when the rotation speed of a gear pump is 60 rpm. It is a graph which shows the discharge amount of the blend material on the conditions of FIG. It is a table | surface which shows the discharge | emission amount of the blend material in each operating condition of each blend unit part when the rotation speed of a gear pump is 90 rpm. It is a graph which shows the discharge amount of the blend material in the conditions of FIG.

  Hereinafter, an embodiment of a melt-kneading apparatus according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited only to these examples.

(First embodiment)
As shown in FIGS. 1 (a) and 1 (b), the melt-kneading apparatus 10A is obtained by melt-kneading resin pellets, inorganic powders and the like (hereinafter referred to as “blend raw materials”) as raw materials for blend materials. A blend material is supplied to an injection molding machine or the like, and a blend material is produced by kneading a plasticizing unit section 20 for heating and plasticizing the blend raw material and a blend raw material supplied from the plasticizing unit section 20. A blend unit 30.

The plasticizing unit section 20 is a cylindrical plasticizing cylinder 21, a plasticizing screw 22 provided to be rotatable around its own axis in the plasticizing cylinder 21, and a plasticizing screw 22 to be driven to rotate about the axis. And a drive unit 23.
On the rear end side of the plasticizing cylinder 21, a hopper portion 24 serving as an inlet for blending raw material and a heater 25 for plasticizing the blend raw material charged into the plasticizing cylinder 21 from the hopper portion 24 are provided. ing.

The blend unit 30 includes a cylindrical blend cylinder 31, a blend screw 32 that is rotatably provided within the blend cylinder 31 around its own axis, and a drive unit 33 that rotationally drives the blend screw 32 about its axis. Prepare.
The blend cylinder 31 is provided with a conduit 31 a for conveying the plasticized resin material extruded from the plasticizing unit 20 to the inner cavity of the blend cylinder 31 and a heater 35 for adjusting the temperature in the blend cylinder 31. ing.

  In the vicinity of the blend material discharge port 31 b provided on the front end side of the blend cylinder 31, a discharge amount adjustment unit 34 </ b> A for adjusting the discharge amount of the blend material from the blend cylinder 31 is provided. The discharge amount adjusting unit 34A of the present embodiment includes a plurality of pipe members (described later) which are connected to the blend cylinder 31 in an exchangeable manner and have the discharge ports 31b and the discharge pipes 36 having predetermined diameters.

  In the melt-kneading apparatus 10 </ b> A configured as described above, the plasticizing screw 22 of the plasticizing unit unit 20 is rotated by the power from the drive unit 23. Blend raw materials such as resin pellets and inorganic powder charged from the hopper 24 are moved toward the front end side in the plasticizing cylinder 21 by the rotation of the plasticizing screw 22 and conveyed. The blend raw material conveyed to the front end side of the plasticizing screw 22 is melted by the heat supplied from the heater 25 and is conveyed to the blend unit section 30 through the pipe line 31a in a plasticized state.

  In the blend unit unit 30, the blend screw 32 is rotated by the power from the drive unit 33. The plasticized blend raw material fed into the blend cylinder 31 from the pipe line 31a is moved by a shear force generated by the blend screw 32 while moving in the blend cylinder 31 toward the tip side by the rotation of the blend screw 32. Dispersed to become a blend material. The blend material conveyed to the front end side of the blend cylinder 31 is pushed out from the discharge pipe 36.

The supply amount of the blend raw material to the blend unit section 30 varies as follows according to the rotation mode of the plasticizing screw 22.
When the rotational speed of the plasticizing screw 22 is increased, the propulsive force by which the solid-state blend raw material not plasticized in the plasticizing cylinder 21 is pushed out to the front end side by the plasticizing screw 22 increases. The supply amount of blend raw material increases. On the other hand, when the rotational speed of the plasticizing screw 22 is lowered, the propulsive force that pushes the unblended solid blend raw material in the plasticizing cylinder 21 to the front of the plasticizing screw 22 is reduced. The supply amount of blend raw material is reduced.

  In the blend unit section 30, when the rotation speed of the blend screw 32 is increased, a strong shearing force acts on the plasticized resin material, and even a blend raw material that is difficult to disperse can be suitably dispersed. In the case of a blend raw material that is easy to disperse, even if the rotation speed of the blend screw 32 is low, it can be dispersed well with a weak shearing force.

  Further, when the number of rotations of the blend screw 32 is increased, the blend raw material supplied to the blend unit unit 30 receives a strong driving force from the blend screw 32, so that the amount of blend material discharged from the discharge port 31b increases. However, since the supply amount of the plasticized resin material supplied from the plasticizing unit portion 20 is constant, the supply amount from the plasticizing unit portion 20 is insufficient and the discharge amount from the blend unit portion 30 is reduced. After that, pulsations that increase again are repeated. For this reason, the supply of the blend material to the injection molding machine or the like becomes unstable.

Therefore, in the present invention, the discharge amount adjusting unit 34A is provided in the blend cylinder 31, and the discharge amount adjusting unit 34A determines the supply amount of the blend raw material from the plasticizing unit unit 20 and the discharge amount of the blend material from the blend unit unit 30. The above pulsation is suppressed by controlling the discharge of the blend material so as to be substantially equal. In the present embodiment, the discharge amount adjusting unit 34 </ b> A is configured by a plurality of pipe members that have a discharge port 31 b and a discharge pipe 36 and are exchangeably attached to the blend cylinder 31. The ease with which the blend material is discharged from the blend cylinder 31 varies depending on the diameters of the discharge port 31 b and the discharge pipe 36 of the pipe member 41.
Since the pipe member 41 can be exchanged for the blend cylinder 31, a pipe member having a discharge port and a discharge pipe having a predetermined diameter is selected and blended in consideration of the supply amount from the plasticizing unit 20 By attaching to the cylinder 31, the ease of discharging the blend material from the blend cylinder 31 is adjusted to an appropriate state according to the blend raw material, blending conditions, etc., and the supply amount from the plasticizing unit section 20 and the blend unit section 30 are adjusted. It is possible to adjust so that the amount of discharge from the battery becomes substantially equal.
In the adjustment, a preliminary examination or the like according to the set value of the supply amount from the plasticizing unit 20 is performed in advance to grasp the optimum values of the diameter of the discharge port and the discharge pipe, and a predetermined pipe satisfying the condition is satisfied. The road member is preferably attached to the blend cylinder 31.

  As described above, when the number of rotations of the blend screw 32 is high, the discharge mode of the blend material from the blend unit unit 30 repeats the above pulsation. When the road member is attached and the diameters of the discharge port and the discharge pipe are reduced, the blend material is hardly discharged from the blend unit 30. As a result, even if the blend screw 32 is rotated at a high speed, the discharge of the blend material is suppressed from rapidly increasing correspondingly. Therefore, the supply of the blend raw material from the plasticizing unit section 20 can no longer catch up, the pulsation in the discharge of the blend material from the blend cylinder 31 is eliminated, and the amount of the blend raw material supplied from the plasticizing unit section 20 is almost the same. The blend material is stably discharged from the blend unit portion 30.

On the other hand, when the rotational speed of the blend screw 32 is low, the propulsive force that the blend raw material supplied to the blend unit unit 30 receives from the blend screw 32 is small. For this reason, if the diameters of the discharge port and the discharge pipe are too small, the blend material is not sufficiently discharged from the blend unit section 30 and falls below the supply amount of the blend raw material from the plasticizing unit section 20. The portion may leak from the rear end side of the blend screw 32.
In such a case, for example, as shown in FIG. 1B, a pipe member 42 having a discharge port 31b and a discharge pipe 36 having a diameter larger than that of the pipe member 41 is replaced with the pipe member 41 and blended. When attached to the cylinder 31, the blend material is easily discharged from the blend unit 30, and as a result of substantially matching the supply amount of the blend raw material, there is no leakage from the rear end side of the blend screw 32.

  Based on the above-described tendency, in the melt-kneading apparatus 10A of the present embodiment, a pipe member having a discharge port and a discharge pipe having an appropriate diameter is selected according to the supply amount of the blend raw material from the plasticizing unit 20 The amount of blend raw material supplied from the plasticizing unit 20 is substantially equal to the amount of blend material discharged from the blend unit 30 (the difference between the two is the plus or minus of the amount of blend raw material supplied). Within 3%).

  As described above, according to the melt-kneading apparatus 10A of the present embodiment, a plurality of pipe members are provided in the discharge amount adjusting unit 34A according to the supply amount of the blend raw material from the plasticizing unit unit 20 to the blend unit unit 30. Replace as appropriate. As a result, the supply amount of the blend raw material and the discharge amount of the blend material from the blend unit unit 30 are substantially equal, so that the pulsation in the discharge of the blend material can be prevented and the blend material can be stably sent to the next process.

  In general, when the rotation speed of the blend screw is increased, the speed at which the blend raw material and the blend material move through the blend cylinder increases, so that the kneading time tends to be shortened. However, the discharge amount adjusting unit 34A causes the blend material from the blend cylinder to be shortened. By controlling the discharge, the kneading time can be further extended. As a result, it is possible to efficiently produce a highly dispersible blend material by ensuring an appropriate kneading time while increasing the rotation speed of the blend screw to such an extent that a shearing force capable of suitably dispersing the blend raw material is generated. it can. As a result, the manufacturing cost of the blend material can be reduced.

(Second embodiment)
Next, the melt-kneading apparatus of 2nd embodiment of this invention is demonstrated with reference to FIG. Since the melt-kneading apparatus 10B of this embodiment differs from the melt-kneading apparatus 10A of the first embodiment only in the configuration of the discharge amount adjusting unit, the description below will focus on differences from the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the common description is omitted.

As shown in FIGS. 2A and 2B, the melt-kneading apparatus 10B includes a plasticizing unit section 20 and a blend unit section 30, and the basic structure is common to the melt-kneading apparatus 10A. doing.
The discharge port 31 b of the blend cylinder 31 of the blend unit unit 30 is provided with a discharge amount adjustment unit 34 </ b> B that adjusts the discharge amount of the blend material from the blend cylinder 31. The discharge amount adjusting unit 34B has a configuration in which a gear pump 38 is provided in a discharge pipe communicating with the discharge port 31b, and conveys the blend material from the end of the blend screw 32 to the outside of the blend cylinder 31. The gear pump 38 is connected to a drive unit 38g, and the operation of the drive unit 38g is controlled by a controller (not shown).

  Upon receiving a command from a controller (not shown), the discharge amount adjusting unit 34B rotates the gear pump 38 at a predetermined number of revolutions, and supplies the blend raw material from the plasticizing unit 20 and discharges the blend material from the blend unit 30. Adjust so that the amount is approximately equal. The controller command may be directly input by the user, or the command content may be referred to from a prestored table or the like based on the blend raw material supply amount input by the user.

  In the discharge amount adjusting unit 34B, instead of changing the diameters of the discharge port 31b and the discharge conduit 36, the ease of discharging the blend material from the blend cylinder 31 is improved by changing the rotation speed of the gear pump 38. Adjust. That is, when the rotation speed of the gear pump 38 is increased, the blend material is easily discharged, and when it is decreased, the blend material is difficult to be discharged. Thereby, like the melt-kneading apparatus of 1st embodiment, while preventing the pulsation in discharge | emission of a blend material, a highly dispersible blend material can be produced efficiently.

  Further, since it is possible to adjust the ease with which the blend material is discharged simply by changing the number of revolutions of the gear pump 38, the member need not be replaced as in the first embodiment, and the adjustment can be performed easily and efficiently. It can be carried out.

The melt-kneading apparatus of this embodiment is further demonstrated using an Example.
First, the number of rotations of the plasticizing screw 22 and the temperature of the plasticizing cylinder 21 in the plasticizing unit section 20 are set according to the conditions 1 to 5 shown in FIG. 3 and discharged from the plasticizing unit section 20 (that is, the blend unit). The amount of the blend raw material supplied to the part was measured. As a blending raw material, a general-purpose polycarbonate pellet (H4000 manufactured by Mitsubishi Engineering Plastics) and a pellet of polyethylene (HY420 manufactured by Nippon Polyethylene Co., Ltd.) were dry blended with a 1: 1 blend, and the discharge amount is every 1 minute. Weighed.
The results are as shown in FIGS. 3 and 4, and it was confirmed that when the number of rotations of the plasticizing screw 22 is increased, the discharge amount is increased accordingly. Under any condition, there was little variation in the discharge amount per minute, and it was estimated that the blend raw material was stably supplied from the plasticizing unit portion to the blend unit portion.

(Example 1 Control by adjusting the diameter of the discharge port)
The operating condition in the plasticizing unit section is the above condition 3, and the number of rotations of the blending screw 32 and the temperature of the blending cylinder 31 in the blending unit section 30 are set to four patterns A to D shown in FIG. The amount of blend material discharged from 30 and its behavior were examined. Three patterns were examined in which the diameter of the discharge port and the discharge pipe to be adjusted by exchanging the pipe members was φ3, 2, and 1 mm.

5 and 6 show the results when the diameter of the discharge port and the discharge pipe is φ3 mm. Under conditions A and B, the discharge amount of the blend material was substantially the same as the supply amount of the blend material, and the discharge value measured every minute was stable. On the other hand, under conditions C and D, the discharge amount of the blend material fluctuated greatly every minute, and discharge pulsation was observed.
As described above, by setting the diameter of the discharge port and the discharge pipeline to 3 mm, pulsation can be prevented and stably blended under the production condition 3 of the plasticizing unit and the conditions A and B of the blending unit. Could be discharged.

7 and 8 show the results when the diameter of the discharge port and the discharge pipe is φ2 mm. In any of the conditions A to D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge amount value measured every minute was stable.
As described above, by setting the diameter of the discharge port and the discharge pipe to φ2 mm, the blend material can be discharged stably under the production conditions of the plasticizing unit section 3 and the blend unit section conditions A to D. I was able to.

9 and 10 show the results when the diameter of the discharge port and the discharge pipe is φ1 mm. Under conditions C and D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge value measured every minute was also stable. On the other hand, under conditions A and B, the discharge of the blend material did not catch up with the supply of the blend material, and the blend material leaked from the rear end side of the blend cylinder.
As described above, by setting the diameter of the discharge port and the discharge pipe to φ1 mm, it is possible to prevent leakage of the blend raw material under the condition 3 of the plasticizing unit section and the conditions C and D of the blend unit section, and to be stable. The blend material could be discharged.

  Next, the operation conditions in the plasticizing unit section are set to the above condition 5 to increase the supply of the blend raw material, and the operation conditions in the blend unit section are set to four patterns of conditions A to D, and discharged from the blend unit section 30. The amount of blend material and its behavior were investigated. Three patterns were examined in which the diameter of the discharge port and the discharge pipe was φ6, 4, and 2 mm.

FIG. 11 and FIG. 12 show the results when the diameter of the discharge port and the discharge pipe is φ6 mm. Under condition B, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge amount value measured every minute was also stable.
On the other hand, under conditions C and D, the discharge amount of the blend material fluctuated greatly every minute, and discharge pulsation was observed. Further, under condition A, the discharge of the blend material did not catch up with the supply of the blend material, and the blend material leaked from the rear end side of the blend cylinder.
From the above, by setting the diameter of the discharge port and the discharge pipe to φ6 mm, pulsation and resin leakage are prevented and stabilized under the production conditions of condition 5 of the plasticizing unit and condition B of the blending unit. The blend material could be discharged.

FIG. 13 and FIG. 14 show the results when the diameter of the discharge port and the discharge pipe is φ4 mm. In any of the conditions A to D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge amount value measured every minute was stable. There was no pulsation or resin leakage.
As described above, by setting the diameter of the discharge port and the discharge pipeline to φ4 mm, the blend material can be discharged stably under the production conditions of the plasticizing unit section 5 and the blend unit sections A to D. I was able to.

15 and 16 show the results when the diameter of the discharge port and the discharge pipe is φ2 mm. Under conditions C and D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge value measured every minute was also stable. On the other hand, under conditions A and B, the discharge of the blend material did not catch up with the supply of the blend material, and the blend material leaked from the rear end side of the blend cylinder.
From the above, by setting the diameter of the discharge port and the discharge pipe to φ2 mm, it is possible to prevent and stabilize the leakage of the blend raw material under the production conditions of the plasticizing unit section 5 and the blend unit section conditions C and D. The blend material could be discharged.

  As described above, the discharge of the blend material is suitably performed by setting the diameters of the discharge port and the discharge pipe line to appropriate values by exchanging the pipe line members according to the operating conditions of the plasticizing unit section and the blend unit section. It was shown that it can be controlled.

(Example 2) Control by adjusting the rotation speed of the gear pump
The operating condition in the plasticizing unit section is the above condition 3, and the rotational speed of the blending screw 32 and the temperature of the blending cylinder 31 in the blending unit section 30 are set to four patterns of conditions A to D, and then discharged from the blending unit section 30. The amount of blend material and its behavior were investigated. The diameter of the discharge port and the discharge pipe was fixed at 2 mm, and the number of rotations of the gear pump 38 was examined in three patterns of 15, 30, and 45 rpm.

17 and 18 show the results when the rotation speed of the gear pump 38 is 15 rpm. Under conditions B to D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge value measured every minute was stable. On the other hand, under condition A, the discharge of the blend material did not catch up with the supply of the blend material, and the blend material leaked from the rear end side of the blend cylinder.
From the above, by setting the rotation speed of the gear pump 38 to 15 rpm, the blending material is prevented from leaking out under the production conditions of the plasticizing unit condition 3 and the blending unit conditions B to D, and the blending is stably performed. The material could be discharged.

19 and 20 show the results when the rotation speed of the gear pump 38 is 30 rpm. In any of the conditions A to D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge amount value measured every minute was stable.
From the above, by setting the rotation speed of the gear pump 38 to 30 rpm, it was possible to discharge the blend material stably under the production conditions of condition 3 of the plasticizing unit and conditions A to D of the blending unit. .

21 and 22 show the results when the rotation speed of the gear pump 38 is 45 rpm. Under conditions A and B, the discharge amount of the blend material was substantially the same as the supply amount of the blend material, and the discharge value measured every minute was stable. On the other hand, under conditions C and D, the discharge amount of the blend material fluctuated greatly every minute, and discharge pulsation was observed.
As described above, by setting the rotational speed of the gear pump 38 to 45 rpm, pulsation is prevented and the blend material is discharged stably under the production conditions of the condition 3 of the plasticizing unit and the conditions A and B of the blending unit. I was able to.

  Next, the operation conditions in the plasticizing unit section are set to the above condition 5 to increase the supply of the blend raw material, and the operation conditions in the blend unit section are set to four patterns of conditions A to D, and discharged from the blend unit section 30. The amount of blend material and its behavior were investigated. The number of rotations of the gear pump 38 was examined in three patterns of 30, 60, and 90 rpm.

23 and 24 show the results when the rotation speed of the gear pump 38 is 30 rpm. Under conditions B to D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge value measured every minute was stable. On the other hand, under condition A, the discharge of the blend material did not catch up with the supply of the blend material, and the blend material leaked from the rear end side of the blend cylinder.
From the above, by setting the rotation speed of the gear pump 38 to 30 rpm, it is possible to prevent the blend raw material from leaking out under the condition 5 of the plasticizing unit and the conditions B to D of the blending unit, and to stably blend. The material could be discharged.

25 and 26 show the results when the rotation speed of the gear pump 38 is 60 rpm. In any of the conditions A to D, the discharge amount of the blend material was substantially the same as the supply amount of the blend raw material, and the discharge amount value measured every minute was stable.
From the above, by setting the rotation speed of the gear pump 38 to 60 rpm, it was possible to discharge the blend material stably under the production conditions of condition 5 of the plasticizing unit and conditions A to D of the blending unit. .

27 and 28 show the results when the rotation speed of the gear pump 38 is 90 rpm. Under conditions A and B, the discharge amount of the blend material was substantially the same as the supply amount of the blend material, and the discharge value measured every minute was stable. On the other hand, under conditions C and D, the discharge amount of the blend material fluctuated greatly every minute, and discharge pulsation was observed.
As described above, by setting the rotation speed of the gear pump 38 to 90 rpm, pulsation is prevented and the blend material is discharged stably under the production conditions of the condition 5 of the plasticizing unit and the conditions A and B of the blend unit. I was able to.

  As described above, it has been shown that the discharge of the blend material can be suitably controlled by setting the rotation speed of the gear pump to an appropriate value in accordance with the operating conditions of the plasticizing unit portion and the blending unit portion.

The embodiments and examples of the present invention have been described above. However, the technical scope of the present invention is not limited to the above-described embodiments, and combinations of components may be changed without departing from the spirit of the present invention. Various changes can be added to or deleted from each component.
For example, as for the discharge amount adjusting unit, any configuration other than those described above may be used as long as the ease of discharging the blend material from the blend cylinder can be adjusted.

Moreover, in the said embodiment, although the specific numerical value is mentioned about the diameter of a discharge port and a discharge pipeline, and the rotation speed of a gear pump, this is optimal according to the dimension and conditions of each part of the melt-kneading apparatus 10A, 10B. Since the values may be different, this is just an example.
Therefore, at the time of carrying out the present invention, it is preferable to determine and set the optimum outlet and outlet pipe diameter and gear pump rotation speed through preliminary experiments and the like based on the actual melt-kneader configuration.

  In addition to this, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate without departing from the gist of the present invention.

10A, 10B Melting and kneading apparatus 20 Plasticizing unit section 21 Plasticizing cylinder 22 Plasticizing screw 23 Drive section 24 Hopper section 25 Heater 30 Blend unit section 31 Blend cylinder 31a Pipe line 31b Discharge port 32 Blend screw 33 Drive sections 34A and 34B Discharge Quantity adjusting unit 35 Heater 36 Discharge pipe 38 Gear pump 38g Drive parts 41, 42 Pipe member

Claims (6)

A melt-kneading apparatus for producing a blend material by melt-kneading a blend raw material,
A plasticizing cylinder, a plasticizing screw that is rotationally driven in the plasticizing cylinder, and a plasticizing unit that plasticizes the blended raw material that has been charged,
A blend unit having a blend cylinder and a blend screw that is rotationally driven in the blend cylinder, and kneading the blend raw material supplied from the plasticizing unit;
Provided in the blend unit section, and adjust the discharge amount of the blend material from the blend unit section to be substantially equal to the supply amount of the blend raw material supplied from the plasticizing unit section to the blend unit section. An emission control section;
A melt-kneading apparatus comprising:   The discharge amount adjusting unit is replaceably attached to the blend cylinder, and is configured by a plurality of pipe members having a discharge port of the blend cylinder and a diameter of a discharge pipe having predetermined values. The melt kneading apparatus according to claim 1.   The discharge amount adjusting unit is a gear pump provided at the discharge port of the blend cylinder, and the discharge amount of the blend material is substantially equal to the supply amount of the blend raw material by controlling the rotation speed of the gear pump. The melt-kneading apparatus according to claim 1, wherein the melt-kneading apparatus is adjusted. A method for producing a blend material using a melt kneading apparatus comprising a plasticizing unit section for plasticizing the charged blend raw material and a blend unit section for kneading the blend raw material supplied from the plasticizing unit section. And
The blending material is adjusted so that a discharge amount of the blending material from the blending unit portion is substantially equal to a supply amount of the blending raw material supplied from the plasticizing unit portion to the blending unit portion. Manufacturing method.   The blend unit portion has a blend cylinder, and the discharge amount of the blend material is adjusted to be substantially equal to the supply amount of the blend raw material by changing the diameter of the discharge port and the discharge pipe of the blend cylinder. The manufacturing method of the blend material of Claim 4 characterized by the above-mentioned.   The blend unit section includes a blend cylinder and a gear pump provided in a discharge port or a discharge pipe of the blend cylinder, and the amount of discharge of the blend material is changed by changing the rotation speed of the gear pump. It adjusts so that it may become substantially equal to the supply_amount | feed_rate of Claim 4, The manufacturing method of the blend material of Claim 4 characterized by the above-mentioned.

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