JP2000345423A - Spinning machine and its operation control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for performing an operation control of a spinning machine without a fear of wasting a molten resin raw material on performing an exchange operation of a spinneret or a filter, capable of preventing the generation of a loss of the molten resin raw material and stably performing the operation control while performing the exchange work of the spinneret or the filter. SOLUTION: This method for performing an operation control comprises detecting the outlet side pressure of a gear pump for a main flow passage 6 with a first pressure-detecting device 11, adjusting the ejection amount from the gear pump 6 with a first pressure-adjusting device 15 based on the detected pressure, also detecting the inlet side pressure of the gear pump 6 with a second pressure detecting device 12, adjusting the raw material supplying amount to a biaxial extruder 2 from a feeder 4 with a second pressure-adjusting device 17 based on the detected pressure, and further, installing a ratio-setting device 19 for controlling the ratio of the raw material supplying amount from the feeder 4 to the extruding amount from the biaxial extruder to a previously set constant ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spinning machine in which a plurality of spinning heads are connected in parallel downstream of a main flow path of a molten resin extruded from a twin-screw extruder, and a method of controlling the operation of the spinning machine.

[0002]

2. Description of the Related Art Generally, as a spinning machine for synthetic fibers, for example, Japanese Patent Publication No. 2-50207 or Japanese Patent Publication No. 3-73648.
In the spinning process, as shown in Japanese Patent Publication No.
A configuration in which a shaft extruder is used is conventionally known. A plurality of spinning heads are connected in parallel downstream of a flow path (main flow path) of a molten resin extruded from an extruder used in this type of spinning machine. Here, each spinning head is provided with an inlet for the extruded resin material and a plurality of caps for melting and spinning a plurality of yarns, and a filter is removed between the inlet and the plurality of caps. It is interposed as possible.

[0003] A metering pump is provided in the flow path on the inlet side of each spinning head. Then, the molten resin extruded from the extruder is pressure-fed to each spinning head by a metering pump in a flow path on the inlet side, and a plurality of yarns are melt-spun by each spinning head.

[0004] Further, a bleed valve such as a three-way valve is usually provided on the inlet side of the metering pump. The bleed valve is connected with a drainage channel, a channel on each spinning head side, and a channel on the main channel side. The bleed valve is normally switched to a position where the drainage flow path is closed, and is held in a state where the flow of the molten resin from the main flow path side to each spinning head is passed.

When clogging occurs in any one of a plurality of spinning heads, or when a filter is periodically replaced, clogging may occur or regular replacement of the filter may be required. With the metering pump at the inlet of the spinning head to be stopped, replace the spinning head,
The filter is replaced. At this time, the drainage flow path is opened by switching the bleed valve of the flow path of the spinning head that performs the replacement operation, and an amount of the molten resin corresponding to the supply amount of the molten resin supplied to the spinning head side is released to the outside. In this way, a method is adopted in which the supply pressure of the molten resin to other spinning heads other than the spinning head that is currently performing the exchange operation is prevented from fluctuating and the spinning operation from other spinning heads is not affected. ing.

After the replacement of the spinning head and the filter is completed, the metering pump is restarted, the bleed valve is switched to close the drainage flow path, and the replacement of the spinning head from the main flow path is performed. The supply of the molten resin is resumed, and the production operation of the yarn from the spinning head is resumed.

[0007]

In the spinning machine of the above-mentioned conventional construction, in order to maintain the production operation of the spinning head other than the spinning head which is clogged and the spinning head being replaced at the time of replacing the filter at the time of replacing the filter, The bleed valve bleeds the molten resin raw material supplied to the spinning head during the replacement work to the drain flow path side, so the molten resin raw material bleed to the drain flow path side by the bleed valve is wasted. However, there is a problem that a large loss occurs.

When the raw material is not bleed to the drain passage by the bleed valve, when the metering pump at the inlet of the spinning head for replacement is stopped, other than the spinning head for which replacement is currently being performed. The supply pressure of the molten resin raw material to the spinning head is increased. Therefore, the supply amount of the molten resin material to other spinning heads other than the spinning head that is currently performing the replacement operation increases, so that, for example, at this time, the thickness of the yarn produced from the other spinning head is smaller than the reference value. For example, the spinning machine may be adversely affected by the spinning operation of other spinning heads, and it is difficult to stably control the operation of the spinning machine.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the waste of the molten resin material from being lost at the time of replacing the spinning head and the filter, thereby preventing the loss of the molten resin material. It is another object of the present invention to provide a spinning machine capable of stably controlling the operation even during the operation of replacing the spinning head and the filter, and a method of controlling the operation thereof.

[0010]

According to a first aspect of the present invention, a raw material feeder is disposed upstream of a twin-screw extruder, and a gear pump for a main flow path is connected to a discharge port on the downstream side of the twin-screw extruder. A plurality of branch channels are connected in parallel on the downstream side of the main channel gear pump, and a spinning head is provided in each branch channel.
A first pressure detector for detecting an outlet pressure of the main flow path gear pump in a spinning machine provided with a branch flow path gear pump interposed at the inlet side of the spinning head; Pump discharge amount adjusting means for adjusting the discharge amount from the main flow path gear pump based on the detected pressure from the pressure detector, and a second pressure detector for detecting the inlet side pressure of the main flow path gear pump, Material supply amount adjusting means for adjusting the amount of material supplied from the material supply device to the twin-screw extruder based on the pressure detected by the second pressure detector; and material supply from the material supply device. Extruder control means for controlling the screw rotation speed of the twin-screw extruder so as to control the amount and the extruded amount from the twin-screw extruder to a predetermined constant ratio. It is a spinning machine. According to the first aspect of the present invention, the pressure fluctuation on the outlet side of the main channel gear pump, which occurs when the spinning head or the filter is replaced or when the spinning head is restarted after the replacement is completed, is reduced to the first pressure. When detected by the detector, the discharge amount from the main flow path gear pump is adjusted by the pump discharge amount adjustment means, and when the pressure fluctuation on the inlet side of the main flow path gear pump is detected by the second pressure detector, It is 2 from the raw material feeder by the raw material supply amount adjusting means.
The supply amount of the raw material supplied to the screw extruder is adjusted, and the raw material supply amount from the raw material supply device and the screw rotation speed of the twin-screw extruder are controlled to a predetermined ratio by the extruder control means. Thus, the screw rotation speed of the twin-screw extruder is controlled.

According to a second aspect of the present invention, the pump discharge amount adjusting means includes a first motor control unit for controlling a drive motor of the main flow path gear pump, and the pump pressure control means adjusts the detected pressure from the first pressure detector. 2. The spinning machine according to claim 1, wherein a drive motor of the main channel gear pump is controlled based on the control to adjust a discharge amount from the main channel gear pump. 3.

According to the second aspect of the present invention, the drive motor of the main flow path gear pump is controlled by the first motor control unit based on the pressure detected by the first pressure detector, and the discharge from the main flow path gear pump is performed. The amount is adjusted.

According to a third aspect of the present invention, the raw material supply amount adjusting means includes a second motor control unit for controlling a drive motor of the raw material supply machine, and based on a detected pressure from the second pressure detector. 2. The spinning machine according to claim 1, wherein the drive motor of the raw material feeder is controlled to adjust the supply amount of the raw material supplied from the raw material feeder to the twin-screw extruder. 3. is there.

According to the third aspect of the present invention, the drive motor of the raw material feeder is controlled by the second motor control unit based on the pressure detected by the second pressure detector, and the twin screw extruder is moved from the raw material feeder. The amount of the raw material supplied to the apparatus is adjusted.

According to a fourth aspect of the present invention, the extruder control means includes a third motor control unit for controlling a screw drive motor of the twin-screw extruder. Yarn quality holding means for maintaining the quality of the yarn by controlling the number of rotations of the screw drive motor of the twin-screw extruder so that the number of rotations of the screw drive motor of the screw extruder and the number of rotations of the screw drive motor of the screw extruder are set to a predetermined constant ratio. The spinning machine according to claim 1, further comprising:

In the invention according to the fourth aspect, the third motor control is performed so that the raw material supply amount from the raw material feeder and the rotation speed of the screw drive motor of the twin-screw extruder are set to a predetermined constant ratio. By controlling the rotation speed of the screw drive motor of the twin-screw extruder by means of a section, the quality of the yarn is maintained.

According to a fifth aspect of the present invention, a raw material feeder is disposed upstream of the twin-screw extruder, and a main flow path gear pump is connected to a discharge port on the downstream side of the twin-screw extruder. A plurality of branch channels are connected in parallel on the downstream side of the road gear pump, and a spinning head and a branch channel gear pump interposed on the inlet side of the spinning head are provided in each branch channel. A spinning machine operation control method for controlling the operation of the spinning machine, comprising: a pump discharge amount adjusting step of adjusting a discharge amount from the main channel gear pump based on an outlet pressure of the main channel gear pump; A raw material supply amount adjusting step of adjusting a supply amount of a raw material supplied from the raw material supply device to the twin-screw extruder based on an inlet pressure of a gear pump; and a raw material supply amount from the raw material supply device and the twin-screw extrusion. Predict the amount of extrusion from the machine It is an operation control method for a spinning machine, characterized by comprising a set constant ratio extruder for controlling the screw rotating speed of the twin screw extruder so as to control the control process.

According to the fifth aspect of the present invention, in the pump discharge amount adjusting step, the discharge amount from the main flow path gear pump is adjusted based on the outlet pressure of the main flow path gear pump. The feed rate of the raw material supplied from the raw material feeder to the twin-screw extruder is adjusted based on the pressure on the inlet side of the road gear pump, and the raw material feed rate from the raw material feeder and the twin-screw extruder are controlled in the extruder control step. The screw rotation speed of the twin-screw extruder is controlled so as to control the extruded amount of the twin screw extruder to a predetermined ratio.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic configuration of the entire spinning machine 1 of the present embodiment. The spinning machine 1 of the present embodiment has a vent type 2 which is a spinning extruder.
A screw extruder 2 is provided. The twin-screw extruder 2 is provided with a twin-screw (not shown) in a cylinder barrel.

Further, the twin-screw extruder 2 is provided with a raw material supply section 3 on the upstream side. A feeder (raw material supply machine) 4 is provided in the raw material supply unit 3. Then, a resin material for spinning is supplied from the feeder 4 to the material supply section 3 of the twin-screw extruder 2.

In the middle of the twin-screw extruder 2, there is provided a decompression suction vent 5 connected to a vacuum pump (not shown). During the transfer, the spinning resin raw material extruded downstream along the extrusion flow path between the cylinder barrel of the twin-screw extruder 2 and the twin-screw according to the rotation of the unillustrated twin-screw. It is kneaded and heated and melted to form a molten resin. During the heating and melting of the extruded material, the water is removed from the extruded material by suction under reduced pressure from the vent portion 5 to remove the water.

A gear pump (GP1) 6 for the main flow path is connected to a discharge port on the downstream side of the twin-screw extruder 2. Further, a plurality of branch channels 8 are connected in parallel downstream of a channel (main channel) 7 of the molten resin extruded from the twin-screw extruder 2 via the gear pump 6. Here, a spinning head 9 and a branch channel gear pump (GP2), which is a metering pump interposed on the inlet side of the spinning head 9, are provided in each branch channel 8.
10 are provided respectively. The molten resin extruded from the twin-screw extruder 2 via the gear pump 6 is guided from the main flow path 7 to a plurality of branch flow paths 8, and then to each of the branch flow paths 8.
Is fed to each spinning head 9 by a branch channel gear pump 10.

Each spinning head 9 is provided with an inlet 9a for extruded resin material and a plurality of bases 9b for melt-spinning a plurality of yarns, and the inlet 9a and the plurality of bases 9b. A filter (not shown) is interposed so as to be removable. The molten resin fed to each spinning head 9 by the branch channel gear pump 10 of each branch channel 8 melts and spins a plurality of yarns by each spinning head 9.

In the spinning machine 1 of the present embodiment, a first pressure detector (P1) 11 for detecting an outlet pressure of the main channel gear pump 6 and an inlet pressure of the main channel gear pump 6 are detected. A second pressure detector (P2) 12 is provided. A head pressure detector (P3) 13 is provided near the discharge port of the twin-screw extruder 2.

Further, the first pressure detector 11 is connected to a first pressure regulator (pump discharge amount regulating means) 15 for controlling a drive motor 14 of the main channel gear pump 6.
During operation of the spinning machine 1 of the present embodiment, the detected pressure from the first pressure detector 11 is input (feedback) to the first pressure regulator 15. At this time, the first pressure regulator 15 drives the main flow path gear pump 6 based on the detected pressure from the first pressure detector 11 so that the outlet side pressure of the main flow path gear pump 6 is kept constant. The motor 14 is controlled, and the gear pump 6 for the main flow path is controlled.
The discharge amount from the nozzle is adjusted.

The second pressure detector 12 is connected to the feeder 4
Is connected to a second pressure regulator (raw material supply amount adjusting means) 17 for controlling the drive motor 16 of the first embodiment. During the operation of the spinning machine 1 of the present embodiment, the detected pressure from the second pressure detector 12 is input (feedback) to the second pressure regulator 17. At this time, the drive motor 16 of the feeder 4 is controlled by the second pressure regulator 17 based on the detected pressure from the second pressure detector 12 so that the inlet pressure of the main flow path gear pump 6 is kept constant. It controls the feed amount of the raw material supplied from the feeder 4 to the twin-screw extruder 2.

Further, a ratio setting device (extruder control means) 19 is connected to the screw drive motor 18 of the twin-screw extruder 2. The ratio setting device 19 includes the second pressure regulator 1
7 is connected. Then, simultaneously with the control of the drive motor 16 of the feeder 4, the screw drive motor 18 of the twin-screw extruder 2 is controlled from the second pressure regulator 17 via the ratio setter 19. At this time, the ratio setting device 19
Then, in order to maintain the quality of the yarn, the screw rotation speed of the twin-screw extruder 2 is adjusted so that the raw material supply amount from the feeder 4 and the screw rotation speed of the twin-screw extruder 2 are set to a predetermined constant ratio. Control.

Next, the operation of the above configuration will be described.
During normal operation of the spinning machine 1 of the present embodiment, a resin material for spinning is fed from the feeder 4 to the raw material supply unit 3 of the twin-screw extruder 2. A resin material for spinning, which is extruded downstream along an extrusion flow path between the cylinder barrel of the twin-screw extruder 2 and the twin-screw as the twin-screw not shown rotates, is kneaded during this transfer. Is heated and melted to form a molten resin.

Further, after the molten resin extruded from the twin-screw extruder 2 through the main channel gear pump 6 is guided from the main channel 7 to a plurality of branch channels 8, the molten resin is It is pumped to each spinning head 9 by a gear pump 10.
Then, a plurality of yarns are melt-spun by the respective spinning heads 9 from the molten resin which is fed to the respective spinning heads 9 by the branch channel gear pumps 10 of the respective branch channels 8.

During operation of the spinning machine 1, the first pressure detector 11 detects the outlet pressure of the main flow path gear pump 6, and the second pressure detector 12 detects the inlet pressure of the main flow path gear pump 6 and the head pressure. Twin screw extruder 2 by detector 13
Are detected in the vicinity of the discharge port.
Then, during the operation of the spinning machine 1, the detected pressure from the first pressure detector 11 is input (feedback) to the first pressure regulator 15. At this time, the first pressure regulator 15 drives the main flow path gear pump 6 based on the detected pressure from the first pressure detector 11 so that the outlet side pressure of the main flow path gear pump 6 is kept constant. The motor 14 is controlled to adjust the discharge amount from the main flow path gear pump 6 (pump discharge amount adjustment step).

Further, during operation of the spinning machine 1, the detected pressure from the second pressure detector 12 is input (feedback) to the second pressure regulator 17. At this time, the second pressure is maintained such that the pressure on the inlet side of the gear pump 6 for the main flow path is kept constant.
The drive motor 16 of the feeder 4 is controlled by the second pressure regulator 17 on the basis of the pressure detected by the pressure detector 12 to adjust the supply amount of the raw material supplied from the feeder 4 to the twin-screw extruder 2. (Raw material supply adjustment step).

Further, simultaneously with the control of the drive motor 16 of the feeder 4, the screw drive motor 18 of the twin-screw extruder 2 is controlled from the second pressure regulator 17 via the ratio setter 19. At this time, in order to maintain the quality of the yarn, feeder 4
The screw rotation speed of the twin-screw extruder 2 is controlled by the ratio setting device 19 so that the raw material supply amount from the screw and the screw rotation speed of the twin-screw extruder 2 are set to a predetermined constant ratio (extruder control). Process).

Next, an example of the operation of replacing the spinning head 9 when any of the spinning heads 9 among the plurality of spinning heads 9 is clogged during the operation of the spinning machine 1 will be described with reference to FIG. explain. In FIG. 2, SM is the rotation speed of the screw drive motor 18 of the twin-screw extruder 2, FM is the rotation speed of the drive motor 16 of the feeder 4, and P2 is the gear pump 6 for the main flow path by the second pressure detector 12. Represents the detected pressure on the inlet side, P1 represents the detected pressure on the outlet side of the main flow path gear pump 6 by the first pressure detector 11, and GP1 represents the change characteristics of the rotation speed of the main flow path gear pump 6, respectively.

First, at time t0 in FIG. 2, the gear pump 10 for the branch flow path at the entrance of the spinning head 9 where clogging has occurred.
Is stopped and the spinning head 9 is replaced. At this time, the molten resin at a constant flow rate is continuously being extruded from the main flow path gear pump 6, so that the stop of the gear pump 10 in one branch flow path 8 causes the main flow path 7 to move from the main flow path 7 to the remaining branch flow path 8.
, The flow rate of the molten resin guided to the outlet increases, and the outlet pressure P1 of the gear pump 6 for the main flow path increases. This pressure fluctuation state is detected by the first pressure detector 11 (a portion in the characteristic of P1 indicated by a solid line).

The output signal from the first pressure detector 11 is fed back to the pressure regulator 15. At this time,
Drive motor 14 for gear pump 6 by pressure regulator 15
, The discharge amount from the gear pump 6 is reduced by lowering the rotation speed (part b in the characteristics of GP1 indicated by the broken line).

Furthermore, the spinning head 9 in which clogging has occurred
When the branch channel gear pump 10 is stopped, the inlet pressure P2 of the main channel gear pump 6 also increases as shown in FIG. The pressure fluctuation of the inlet pressure P2 of the main channel gear pump 6 is detected by the second pressure detector 12 (portion c in the characteristic of P2 indicated by a dashed line).

The output signal from the second pressure detector 12 is fed back to the second pressure regulator 17. At this time, the amount of raw material supplied from the feeder 4 is reduced by reducing the rotation speed of the drive motor 16 of the feeder 4 by the second pressure regulator 17 (d portion in the FM characteristics indicated by the solid line). At the same time, the screw drive motor 1 of the twin-screw extruder 2 is passed from the second pressure regulator 17 through the ratio setting device 19.
8 is controlled. At this time, in order to maintain the quality of the yarn, the twin screw extruder is controlled by the ratio setting device 19 so that the amount of the raw material supplied from the feeder 4 and the screw rotation speed of the twin screw extruder 2 are set to a predetermined constant ratio. The screw rotation speed of the machine 2 is controlled (part e in the SM characteristics indicated by the solid line).

After the replacement of the clogged spinning head 9 is completed, the stopped operation of the branch flow path gear pump 10 is resumed. At this time, the outlet side pressure of the main flow path gear pump 6 decreases due to the restart of the stopped operation of the branch flow path gear pump 10. This pressure fluctuation state is detected by the first pressure detector 11, and when an output signal from the first pressure detector 11 is fed back to the pressure regulator 15, the pressure pump 15
The rotation speed of the drive motor 14 is increased, and the discharge amount from the gear pump 6 is increased.

Further, increasing the number of rotations of the drive motor 14 of the gear pump 6 has an effect of lowering the inlet pressure of the main channel gear pump 6. This pressure fluctuation is the second
Is detected by the pressure detector 12.

The output signal from the second pressure detector 12 is fed back to the second pressure regulator 17. At this time, the amount of raw material supplied from the feeder 4 is increased by increasing the rotation speed of the drive motor 16 of the feeder 4 by the second pressure regulator 17. At the same time, the screw drive motor 18 of the twin-screw extruder 2 is controlled from the second pressure regulator 17 via the ratio setting device 19. At this time, in order to maintain the quality of the yarn, the feeder 4 is set by the ratio setting device 19.
The screw rotation speed of the twin-screw extruder 2 is controlled so that the raw material supply amount from the screw and the screw rotation speed of the twin-screw extruder 2 are set to a predetermined constant ratio.

As described above, during operation of the spinning machine 1 according to the present embodiment, the pressure control device is used when the spinning head 9 is replaced or when the stopped branch flow path gear pump 10 is restarted. The production operation can be quickly and stably performed with respect to pressure fluctuations of the outlet pressure and the inlet pressure of the gear pump 6 for the main flow path.

Therefore, the above configuration has the following effects. That is, in the spinning machine 1 according to the present embodiment, for example, when clogging of any of the spinning heads 9 among the plurality of spinning heads 9 occurs during the operation of the spinning machine 1, the spinning head 9 is replaced when the spinning head 9 is replaced. When the branch channel gear pump 10 at the inlet of the spinning head 9 is stopped, the operation control of the spinning machine 1 as described above is performed. That is, the gear pump 1 for the branch flow path at the entrance of the spinning head 9 where clogging has occurred.
When the first pressure detector 11 detects a pressure fluctuation in which the pressure on the outlet side of the main flow path gear pump 6 that rises due to the stop of 0 is detected by the first pressure regulator 15, the pressure from the main flow path gear pump 6 is reduced. The second pressure regulator 17 adjusts the discharge amount so as to decrease the pressure and increases the pressure on the inlet side of the main channel gear pump 6 when the second pressure detector 12 detects the pressure fluctuation.
Is adjusted so as to decrease the supply amount of the raw material supplied to the twin-screw extruder 2, and the raw material supply amount from the feeder 4 and the screw rotation speed of the screw drive motor 18 of the twin-screw extruder 2 are adjusted by the ratio setting device 19. The screw drive motor 18 of the twin-screw extruder 2 is controlled so that
Control the screw rotation speed. Thereby, when performing the replacement work of the spinning head 9 in which the clogging has occurred or the filter, the production operation can be stably continued with respect to the pressure fluctuation generated by stopping the gear pump 10 at the inlet of the spinning head 9. Therefore, the operation of the entire spinning machine 1 can be stably controlled even during the operation of replacing the spinning head 9 in which clogging has occurred or the spinning head 9 for replacing the filter. Therefore, there is no possibility that the thickness of the yarn produced from the other spinning heads 9 other than the spinning head 9 which is currently performing the exchange operation will fluctuate, and the adverse effect on the spinning operation of the other spinning heads 9 can be prevented. it can.

Further, as in the conventional spinning head 9 in a case where the molten resin raw material supplied to the spinning head during the exchange operation is bleed to the drain passage side by the bleed valve.
Also, there is no possibility that the molten resin material is wasted when the filter is replaced, and it is possible to prevent the loss of the molten resin material.

Furthermore, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0045]

According to the first and fifth aspects of the present invention, the discharge amount from the gear pump for the main flow path is adjusted based on the pressure on the outlet side of the gear pump for the main flow path, and the raw material is adjusted based on the pressure on the inlet side of the gear pump for the main flow path. The feed rate of the raw material supplied from the feeder to the twin-screw extruder is adjusted, and the feed rate of the raw material from the feeder and the extruded rate from the twin-screw extruder are controlled to a predetermined constant ratio. Since the screw rotation speed of the twin-screw extruder is controlled at the same time, there is no possibility that the molten resin material is wasted at the time of replacing the spinning head or the filter, and the occurrence of loss of the molten resin material can be prevented. At the same time, the operation can be stably controlled during the operation of replacing the spinning head and the filter.

According to the second aspect of the present invention, the drive motor of the main channel gear pump is controlled by the first motor control unit based on the detected pressure from the first pressure detector in the spinning machine according to the first aspect. Thus, the discharge amount from the main flow path gear pump is adjusted, so that the outlet side pressure of the main flow path gear pump can be maintained in a substantially constant state.

According to the third aspect of the present invention, the drive motor of the raw material feeder is controlled by the second motor control unit based on the detected pressure from the second pressure detector in the spinning machine according to the first aspect. Since the supply amount of the raw material supplied from the raw material supply device to the twin-screw extruder is adjusted, the pressure on the inlet side of the main channel gear pump can be maintained at a substantially constant state.

According to a fourth aspect of the present invention, in the spinning machine according to the first aspect, the supply amount of the raw material from the raw material supply device and the rotation speed of the screw drive motor of the twin-screw extruder are set to a predetermined constant ratio. Since the rotation speed of the screw drive motor of the twin-screw extruder is controlled by the third motor control unit in such a manner, the quality of the yarn can be stably maintained.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram showing a spinning machine according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining an operation control state at the time of replacing a spinning head and a filter in the spinning machine according to the first embodiment.

[Explanation of symbols]

 Reference Signs List 2 vented twin-screw extruder 3 feeder 4 feeder (feeder) 6 gear pump for main flow path 7 main flow path 8 branch flow path 9 spinning head 10 gear pump for branch flow path 11 first pressure detector 12 second Pressure detector 14 Main channel gear pump drive motor 15 First pressure regulator (pump discharge amount adjustment means) 16 Feeder drive motor 17 Second pressure regulator (raw material supply amount adjustment means) 18 Screw drive motor 19 Ratio Setting device (extruder control means)

Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat II (reference) // B29L 31:00 F term (reference) 4F207 AG14 AH66 AH81 AP03 AR09 AR14 AR15 AR16 KA01 KA17 KK13 KL38 KL41 KL94 KM05 KM15 4L045 AA05 BA01 CA20 CA28 CA29 CA40

Claims (5)

[Claims] A feeder disposed upstream of the twin-screw extruder, a gear pump for the main flow passage connected to a discharge port on the downstream side of the twin-screw extruder, and a downstream side of the gear pump for the main flow passage; A plurality of branch flow paths are connected in parallel on the side, a spinning head is provided in each branch flow path, and a branch flow path gear pump interposed on the inlet side of the spinning head. A first pressure detector for detecting an outlet pressure of the gear pump for the main flow path, and a pump discharge amount adjusting means for adjusting a discharge amount from the gear pump for the main flow path based on the detected pressure from the first pressure detector. A second pressure detector for detecting an inlet pressure of the main channel gear pump; and a supply from the raw material supply device to the twin-screw extruder based on a detection pressure from the second pressure detector. Raw material supply to regulate raw material supply Adjusting means; extrusion controlling the screw rotation speed of the twin-screw extruder so as to control the raw material supply amount from the raw material feeder and the extrusion amount from the twin-screw extruder to a predetermined constant ratio. A spinning machine comprising a machine control means. 2. The pump discharge amount adjusting means includes a first motor control unit that controls a drive motor of the gear pump for the main flow path, and the main flow path is controlled based on a pressure detected by the first pressure detector. 2. The spinning machine according to claim 1, wherein a drive motor of the gear pump is controlled to adjust a discharge amount from the gear pump for the main flow path. 3. The raw material supply amount adjusting means includes a second motor control unit for controlling a drive motor of the raw material supply device, and the raw material supply device is controlled based on a detected pressure from the second pressure detector. 2. The spinning machine according to claim 1, wherein the amount of the raw material supplied from the raw material feeder to the twin-screw extruder is adjusted by controlling the drive motor of the spinning machine. 4. The extruder control means includes a third motor control unit for controlling a screw drive motor of the twin-screw extruder, wherein a raw material supply amount from the raw material feeder and a screw of the twin-screw extruder are controlled. A yarn quality maintaining means for maintaining the quality of the yarn by controlling the rotational speed of the screw drive motor of the twin-screw extruder so that the rotational speed of the drive motor is set to a predetermined constant ratio. The spinning machine according to claim 1, wherein the spinning machine is provided. 5. A raw material feeder is disposed upstream of the twin-screw extruder, and a main flow path gear pump is connected to a discharge port on the downstream side of the twin-screw extruder. A plurality of branch channels are connected in parallel on the side, and a spinning head is provided in each branch channel, and a branch channel gear pump provided on the inlet side of the spinning head is operated by a spinning machine. In the operation control method of the spinning machine to be controlled, a pump discharge amount adjusting step of adjusting a discharge amount from the main channel gear pump based on an outlet pressure of the main channel gear pump; and an inlet pressure of the main channel gear pump. A raw material supply amount adjusting step of adjusting a supply amount of a raw material supplied from the raw material supply device to the twin-screw extruder based on: a raw material supply amount from the raw material supply device and an extrusion amount from the twin-screw extruder And a preset constant An extruder control step of controlling the screw rotation speed of the twin-screw extruder so as to control the spinning ratio to a ratio of: