JPH05169443A - Preparation of chip and apparatus therefor - Google Patents

Abstract

PURPOSE:To control automatically the rotating speed of each polymer supply device of a chip making apparatus quickly at a proper value corresponding to the change in the amount of polymer when the amount of the polymer introduced to a chip making apparatus is changed. CONSTITUTION:The change in the number of revolution of a gear pump 6 which sends polymer produced to a quench drum 10 or the change in a polymer level in a polymer tank 2 is detected. On the basis of the detected values of the changes, the rotating speeds of the quench drum 10, a take-up 12, and a cutter 14 are respectively controlled automatically to the specified speeds corresponding to the values of the changes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip manufacturing method for continuously spinning and using a continuous polymerization spinning device, and a chip manufacturing apparatus used therefor.

[0002]

2. Description of the Related Art When continuous polymerization spinning is performed and a chip is produced while spinning, an apparatus as shown in FIG. 3 is used. This apparatus comprises a final polymerization reaction tank 1 in which a polymer is continuously polymerized from raw material monomers.
The produced polymer is continuously supplied to the polymer reservoir 2, and while this is continuously taken out by the booster pump 3, a part of the polymer is introduced into the spinneret 5 by the spinning gear pump 4 to perform spinning. The remainder is introduced into the chip making equipment 7 by the chip making gear pump 6 so that the chip 8 can be manufactured.

The chip making equipment 7 is provided with a quench drum 10 which takes in the molten polymer introduced from the chip making gear pump 6 and sends it to the cooling means 9. The thin rod-shaped rope 11 is obtained by cooling and solidifying by passing through the cooling means 9 through the entidorum 10. The obtained rope 11 is pulled out by a takeup 12 provided on the downstream side of the cooling means 9, introduced into a cutting device 13, and cut into a predetermined length by a cutter 14 to form a chip 8.

[0004]

SUMMARY OF THE INVENTION In such a device,
Although the amount of the produced polymer can be kept constant by setting the conditions of the polymerization reaction constant, if the amount of the polymer used for spinning fluctuates on the spinning side due to a trouble of the spinneret 5, etc. If the amount of polymer introduced to the equipment 7 inevitably fluctuates, the size of the obtained chip varies, and if the process for fluctuations in the amount of polymer is delayed, the booster pump 3 stops and the entire production line stops. Therefore, we must prepare for a drastic drop in production.

Therefore, when the amount of polymer introduced into the chip making equipment 7 is changed as described above,
For example, when the amount of polymer increases, the number of revolutions of each polymer feeding means (specifically, the Quantum drum 10, the take-up 12 and the cutter 14) is increased so that the above-mentioned trouble does not occur, and the chip production capacity is increased. By increasing it, the quality stability of the chip 8 is secured. However, the operator adjusts the number of rotations of each means like this.
The speed volume 15 provided in each means is only manually adjusted by relying on intuition, and it is difficult to accurately and promptly respond to the fluctuation of the introduced polymer, and its improvement is strongly demanded. It was

The present invention has been made in view of the above circumstances, and when the amount of polymer introduced into the chip making equipment varies, each of the chip making equipment can be quickly changed according to the variation. The object is to automatically control the rotation speed of the polymer feeding means to an appropriate speed.

[0007]

In order to achieve the above object, the present invention continuously takes out the produced polymer from a polymer reservoir portion to which the produced polymer is continuously supplied, and a part of the produced polymer is put into a spinneret. Introduced and spun, the rest is introduced into the cooling means through the quenchi drum to be solidified, then pulled out by the takeup and then cut into a predetermined length with a cutter to obtain the chip. The rotation speed of the gear pump that delivers the produced polymer to the or the fluctuation of the polymer liquid level in the polymer reservoir is detected, and based on the detected fluctuation value, the rotational speeds of the quant drum, takeup and cutter are calculated as described above. The first gist is the manufacturing method of the chip in which the speed is automatically controlled to a predetermined speed corresponding to the fluctuation value, and the polymer produced is continuously supplied. Mer reservoir, a booster pump for continuously extracting the produced polymer from the polymer reservoir, a spinning gear pump for delivering a part of the produced polymer taken out by the booster pump to the spinneret side, and the produced polymer The rest of the powder is sent to the side of the quant drum, a chip-making gear pump, a quant cylinder that guides the produced polymer delivered by the chip-making gear pump into the cooling means, and the solid is cooled and solidified by the cooling means. A take-up for pulling out the polymerized cord and a cutter for cutting the cord drawn out by the take-up into a predetermined length, and a detecting means for constantly detecting the height of the liquid surface of the polymer reservoir or the gear pump for chip-making It is equipped with a detector that constantly detects the number of rotations of the If the means deviates from a reference value, the rotational drive means for the quantit drum, the takeup and the cutter are automatically controlled to a predetermined speed according to the fluctuation. The summary is 2.

[0008]

That is, according to the present invention, in contrast with the conventional technique, the operator manually adjusts the amount of the polymer introduced into the chip making equipment side by manually adjusting the rotation speed of each polymer feeding means in accordance with the variation. The fluctuation of the polymer amount is constantly detected, and the rotation speed of each polymer feeding means can be immediately and automatically controlled according to the detected fluctuation value. Therefore, according to the present invention, it is possible to always obtain a chip having a stable size, irrespective of the variation in the amount of polymer introduced. Further, since the feed rate of each polymer is immediately adjusted according to the amount of polymer, the booster pump does not stop.

Next, the present invention will be described in detail based on examples.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the construction of a chip manufacturing apparatus used in the present invention. This device has basically the same configuration as the conventional device shown in FIG. 3, and the same parts are denoted by the same reference numerals. However, this apparatus is provided with the following special control means. That is, first, in the polymer reservoir portion 2 of this device, a sensor 20 for reading the liquid level
Is attached, and the read data is the liquid level gauge 2
1 is input. And the liquid level gauge 21
When the liquid level is lower than the reference liquid level of, the motor 6a that rotationally drives the chipmaking gear pump 6 is instructed to reduce the rotation speed, and the liquid level is raised above the reference liquid level. In this case, the motor 6a is instructed to increase the rotation speed.

Further, the proper rotation speed V _GP of the gear pump 6 given by the above instruction is controlled by a control means (not shown).
Through the proper rotation speed V _{C of} the cutter 14 (V _GP 4
0-60%), and based on this value, cutter 1
The rotation control is given to the motor 14a which drives the rotation of No. 4 in FIG. Reference numeral 23 is a speed bias volume that changes the ratio of the rotation speed of the chipmaking gear pump 6 to the rotation speed of the cutter 14, and is ± 200r.
The speed can be adjusted within the range of pm. In theory, the rotational speed of the cutter 14 can be controlled in proportion to the rotational speed of the gear pump 6, but a situation different from the theoretical value may occur depending on the operating history of the cutter 14 and the machine base difference. Therefore, it is designed to cope with such a situation. A cutter speed bias volume 24 is provided in order to control the rotation speed of the cutter 14 independently of the rotation speed of the gear pump 6.

Further, the proper rotation speed V _C of the cutter 14 is converted into a proper rotation speed V _{TU of the} take-up 12 (around 80% of V _C ) through the control means, and the take-up 12 is converted based on this value. 1 that drives the rotation of
The rotation control is given to 2a. In addition,
26 is a speed bias volume that changes the ratio of the rotation speed of the cutter 14 to the rotation speed of the take-up 12.
The speed can be adjusted within the range of ± 150 rpm. This is also the same as the reason why the speed bias volume 23 is provided, and a situation different from the theoretical value may occur due to the driving history of the cutter 14 and the machine base difference. Is. Further, a take-up speed bias volume 27 is provided in order to control the rotational speed of the take-up 12 separately from the rotational speed of the cutter 14.

On the other hand, the proper rotation speed V _C of the cutter 14 is converted to the proper rotation speed V _QD (around 54% of V _C ) of the quant drum 10 through the control means, and based on this value. The rotation control is applied to the motor 10a that drives the rotation of the quantum drum 10.
However, this value depends on the speed bias volume 28 and is 50 to 7 of the proper rotation speed V _TU of the take-up 12.
It is adjustable within the range of 5%. This also takes into consideration the difference between the theoretical value and the actual value.

The control flow for controlling the rotation speed of the cutter 14 based on the rotation speed of the gear pump 6 and the control flow for controlling the rotation speed of the take-up 12 based on the rotation speed of the cutter 14 respectively include gains. Biases 22 and 25 are provided so that the inclination of each rotation speed can be changed.

Therefore, according to this apparatus, when the rotation speed of the gear pump 6 changes due to the fluctuation of the liquid level of the polymer reservoir 2, the cutter 1 follows the above control system.
4, the take-up 12 and the quant drum 10 are immediately controlled to control the rotating speed of the cutter 1.
The cutting by 4 is properly performed according to the change of the polymer flow, and the size of the chip 8 does not change. Moreover, since the polymer is smoothly fed, the production of chips can be efficiently continued.

In the above device, the gear pump 6,
Cutter 14, Takeup 12, Quench drum 1
The conversion coefficient for associating and controlling each rotation speed of 0 was calculated from the slope of each rotation speed-chip production correlation curve shown in FIG. 2, for example. Further, in the control system of the above device, the rotation speed of the cutter 14 is controlled by first obtaining the proper rotation speed V _C of the cutter 14 based on the proper rotation speed V _GP of the gear pump 6. In the chip making equipment 7, the cutting ability of the cutter 14 must correspond to the flow rate of the polymer fed.

By the way, the rotation speed of each feeding means can be controlled within the following range, and the chip is manufactured (and spun) according to the above control system, and at this time, the rotation speed of the gear pump 6 is changed as follows. As a result, even if the rotation speed of the gear pump 6 changes, the size of the obtained chip does not change, and the same quality can be stably obtained.

<Chip making specifications> Rotational speed of the gear pump 6 (V _GP ): 515 rpm and 6
Rotation speed (V _QD ): 50 rpm Quench drum 10 (diameter 400 mm): 330 to 830 rpm Rotation speed (V _QD ) of take up 12 (diameter 120 mm)
_TU ): 510 to 1310 rpm Rotating speed of the cutter 14 (number of blades 30) (V _C ): 61
0 to 1550 rpm

In the above embodiment, the liquid level change is read by the liquid level gauge 21 to control the rotation speed of the gear pump 6, and the feeding means (cutter 14) is based on the rotation speed of the gear pump 6. , The take-up 12, and the quantit drum 10) are controlled, but the rotational speed of each feeding means may be controlled directly from the amount of change in the liquid level measured by the liquid level gauge 21. In addition, gain biases 22 and 25 and speed bias volumes 23 and 2
4, 26 to 28 are not particularly required if the device operates theoretically.

[0020]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, when performing chip making using a continuous polymerization direct spinning device, the fluctuation of the amount of polymer introduced to the chip making side is constantly detected mechanically and detected. The rotation speed of each polymer feeding means can be immediately and automatically controlled according to the variation value. Therefore, according to the present invention, it is possible to always obtain a chip having a stable size, irrespective of the variation in the amount of polymer introduced. Further, since the feeding speed of each polymer is immediately adjusted according to the amount of polymer, the booster pump is not stopped. Moreover, since the automatic control is performed, manpower for adjustment is not required, and unmanned equipment can be unmanned.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a curve diagram showing the correlation between the number of revolutions of each feeding means and the chip production amount in the above embodiment.

FIG. 3 is a block diagram of a conventional chip manufacturing apparatus.

[Explanation of symbols]

 2 Polymer reservoir 5 Spinneret 6 Chip making gear pump 9 Cooling means 10 Quench drum 12 Take up 14 Cut

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Takanori Shimomiya 36-5-1 Hatta, Miyazaki-mura, Nyu-gun, Fukui Prefecture

Claims (4)

[Claims] 1. A produced polymer is continuously taken out from a polymer reservoir where the produced polymer is continuously supplied, a part of the polymer is introduced into a spinneret for spinning, and the rest is cooled through a queuing drum. In a method of manufacturing a chip, which is introduced into a means to be solidified, drawn out by a take-up, and then cut into a predetermined length by a cutter to obtain a chip, in the manufacturing method of the chip, the rotation speed of the gear pump for sending the produced polymer to the quant drum side or the inside of the polymer reservoir Of the polymer liquid level of No. 1, and based on the detected variation value, the rotational speeds of the above-mentioned Quenti drum, take-up and cutter are automatically controlled to predetermined speeds corresponding to the above variation value. The manufacturing method of the chip. 2. In controlling the rotational speed of each of the quantit drum, take-up and cutter, the rotational speed of the cutter is first controlled based on the fluctuation value, and then the rotational speed of the controlled cutter is referenced. The method for producing a chip according to claim 1, wherein the rotational speed of the take-up and the rotational speed of the quant drum are controlled. 3. A polymer reservoir part to which the produced polymer is continuously supplied, a booster pump for continuously taking out the produced polymer from the polymer reservoir part, and a part of the produced polymer taken out by the booster pump. A spinning gear pump for delivering to the spinneret side, a chipmaking gear pump for delivering the rest of the produced polymer to the quantum drum side, and a produced polymer delivered by the chipmaking gear pump for guiding into the cooling means. A quantile drum, a takeup for drawing out the polymer that has been solidified by cooling by the cooling means, and a cutter that cuts the rope drawn out by the takeup to a predetermined length, and the liquid surface of the polymer reservoir Of the above-mentioned chip making gear pump When any one of the above detection means deviates from the reference value, the rotary drive means of each of the quantich drum, the takeup and the cutter automatically operates at a predetermined speed according to the variation. A chip manufacturing device characterized by being controlled. 4. The rotation speed of the cutter is controlled to a predetermined speed in accordance with the fluctuation value detected by the detecting means, and the rotation speed of the takeup and the rotation speed of the quant drum are controlled by the cutter. 4. The chip manufacturing apparatus according to claim 3, wherein the chip manufacturing apparatus is controlled according to the controlled speed.