JP2001170993A - Method for automatic starting-up and controlling outer diameter in extruding tandem line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for automatic starting-up and controlling an outer diameter in an extruding tandem line which automatically controls a speed in starting-up and keeps a stable quality of a produced cable. SOLUTION: In one extruding line there are set a master velocity command value and ratios of a take-up speed command value and an extruding speed command value to the master speed command value to determine a deviation value of an outer diameter of a produced cable and then based on the deviation value, the take-up speed command value and the extruding speed command value each drive signal is given to the take-up machine and the extruder and in another extruding line there is set a ratio of an extruding speed command value to a take-up drive signal to determine a deviation of the outer diameter of the produced cable and then based on the deviation value, the take-up speed command value and the extruding speed command value a drive signal is given to the extruder whereby the outer diameter of each produced cable is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion tandem line in which product cables from a plurality of extruders are collectively taken by a single take-off machine. The present invention relates to a method for automatically starting up and controlling the outer diameter of an extrusion tandem line for stabilizing the quality of a slab.

[0002]

2. Description of the Related Art In an extrusion tandem line, a product cable is manufactured by coating an extruded material on a linear body by an extruder at each of a plurality of extrusion lines, and the product cables of each extrusion line are collectively collected by one take-off machine. To take over.

Heretofore, an operation of starting up an extrusion tandem line and an operation of stabilizing the outer diameter of a product cable have been performed by an operator.

That is, the outer diameter of a product cable is measured by an outer diameter measuring device installed in each extrusion line, and when the measured value deviates from a prescribed value, an operator can check the number of screw rotations of the extruder or the product cable. The outer diameter of the product cable is corrected by adjusting the take-up speed of the product cable using a master setting device provided at the upper stage and a ratio setting device provided at the lower stage.

[0005] In addition, at the time of setup before the start of the extrusion tandem line, when the screw rotation speed of each extruder and the product cable take-off speed are lower than the steady speed, the screw rotation speed of each extruder and the product cable take-up are set. The outer diameter of the product cable is stabilized by adjusting the ratio with the speed using a ratio setting device. Start up when the outer diameter of each product cable is stable. At startup, gradually increase the screw rotation speed of each extruder and the take-up speed of the product cable from the setup speed to the steady speed with the master setting device so that the measured value of the outer diameter of each product cable does not deviate from the specified value. Is increasing.

[0006]

When the extrusion tandem line is started (when the speed is increased from the setup speed to the steady speed) or when the extruded tandem line is lowered (when the speed is reduced from the steady speed to the stop), the speed is manually adjusted. However, adjusting the speed is very difficult and requires concentration of nerves. Further, it is impossible to stabilize the outer diameter of a plurality of extruders having different properties at the same time as the start-up and the shut-down operations. Cables manufactured at the time of startup and shutdown are not products because the outer diameter is indefinite, and are scrap wires.

Therefore, an object of the present invention is to solve the above-mentioned problems, to provide a method of automatic start-up and outer diameter control in an extrusion tandem line that automates speed control at start-up and stabilizes the quality of a product cable. To provide.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for manufacturing a product cable by coating an extruded material on a linear body by an extruder in each of a plurality of extrusion lines, and manufacturing a product cable in each extrusion line. When starting up an extrusion tandem line that collects cables with one take-off machine, set the master speed command value of the extrusion tandem line on one of the extrusion lines using the master setting device. The ratio of the take-off speed command value to the master speed command value is set by the take-up speed command value, the ratio of the extrusion speed command value to the master speed command value is set by the extrusion ratio set device, and the outer diameter of the product cable is measured by the outer diameter measuring device. A deviation value of the measured outer diameter from the preset outer diameter target value is determined, and a product cable is determined based on the deviation value, the take-off speed command value, and the extrusion speed command value. A drive signal is given to each of the take-off machine and the extruder so that the outside diameter is stabilized at the outside diameter target value, and in another extrusion line, the ratio of the extrusion speed command value to the take-off machine drive signal is set by an extrusion ratio setting device. The outer diameter of the product cable is measured by an outer diameter measuring device to determine a deviation value of the outer diameter measurement value with respect to a preset outer diameter target value, and the deviation value, the take-off machine drive signal, and the extrusion speed command value are calculated. The drive signal is supplied to the extruder so that the outer diameter of the product cable is stabilized at the outer diameter target value based on the outer diameter.

In an extrusion line provided with a plurality of extruders, one extruder is used as a main extruder, and a ratio to a drive signal to the main extruder is set by a ratio setting device to drive to another sub-extruder. The signal may be adjusted.

[0010]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

An extruded tandem line embodying the present invention comprises:
It has a plurality of extrusion lines for manufacturing a product cable by an extruder, and has a single take-off machine for collectively collecting the product cable of each extrusion line. The one shown in FIG.
O. 1, NO. 2, NO. It has three extrusion lines. NO. One extrusion line is provided with only one extruder. It is called one main extruder. NO. No. 2 extrusion line, NO. Two extruders, a main extruder and a sub-extruder, are provided. NO. No. 3 extrusion line Only three main extruders are provided. NO. In one extrusion line, control of the take-off machine is also performed.

NO. In one extrusion line, a master setting device 1 for setting a master speed command value V0 of the extrusion tandem line.
A take-up ratio setting device 2 for setting a ratio of the take-up speed command value V1 to the master speed command value V0; No. 1 for setting the ratio of the extrusion speed command value V2 for one extrusion line. 1 extrusion ratio setting device 3,
NO. An outer diameter measuring head 6 for measuring the outer diameter of the product cable 5 of one extrusion line, an outer diameter measuring device 7 for obtaining a deviation value of the outer diameter measured value from a preset outer diameter target value, a deviation value and a take-up speed Command value V1 and NO. No. 1 based on the extrusion speed command value V2 of the extrusion line. No. 1 so that the outer diameter of the product cable of the extrusion line 1 is stabilized at the outer diameter target value.
An automatic starter 4 for supplying drive signals V4 and V3 to one extruder, a take-off drive driver 8 for outputting electric power corresponding to the take-off machine drive signal V4, and a take-off drive motor 9 for driving the take-off machine with the electric power. Output power corresponding to the extruder drive signal V3. No. 1 extrusion drive driver 10 and NO. An extrusion drive motor 11 for driving one main extruder is provided.

NO. No. 2 extrusion line, NO. An outer diameter measuring head 13 for measuring the outer diameter of the product cable 12 of the extrusion line 2, an outer diameter measuring device 14 for obtaining a deviation value of the outer diameter measured value from a preset outer diameter target value, The operational amplifier 16 for amplifying the take-up machine drive signal V4 in the extrusion line 1 and the take-up machine drive signal V4 are regarded as a master speed command value. No. 2 for setting the ratio of the extrusion speed command value V6 of the second extrusion line. 2 extrusion ratio setting device 17, deviation value, take-up machine drive signal V4 and NO. No. 2 based on the extrusion speed command value V6 of the extrusion line. Product cable of 2 extrusion line 12
No. is set so that the outer diameter becomes stable at the outer diameter target value. No. 2 that outputs a drive signal V7 to the extruder 2 and outputs an electric power corresponding to the extruder drive signal V7. 2 pushing drive driver 18 and NO. No. 2 driving the main extruder.
2. Extruder drive motor 19, operational amplifier 20 for amplifying extruder drive signal V7, sub-extruder ratio setting device 21 for setting the ratio of sub-extruder drive signal V9 to extruder drive signal V7, and sub-extruder drive A sub-extrusion drive driver 22 that outputs electric power according to the signal V9 and a sub-extrusion drive motor 23 that drives the sub-extruder with this electric power are provided.

NO. No. 3 in the extrusion line. An outer diameter measuring head 25 for measuring the outer diameter of the product cable 24 of the extrusion line 3, an outer diameter measuring device 26 for obtaining a deviation value of the outer diameter measured value from a preset outer diameter target value, The operational amplifier 27 for amplifying the take-up machine drive signal V4 in the extrusion line 1 and the take-up machine drive signal V4 are regarded as a master speed command value. No. 3 for setting the ratio of the extrusion speed command value V11 of the third extrusion line. 3 Extrusion ratio setting device 28 and deviation value V1
2 and take-up machine drive signal V4 and NO. No. 3 based on the extrusion speed command value V11 of the extrusion line 3. No. 3 so that the outer diameter of the product cable 24 of the 3 extrusion line is stabilized at the outer diameter target value. Three
An outer diameter controller 29 that supplies a drive signal V13 to the extruder, and a NO. That outputs power corresponding to the extruder drive signal V13. No. 3 extrusion drive driver 30 and NO. No. 3 for driving the main extruder. A three-push drive motor 31 is provided.

The automatic starter 4 and the outer diameter controllers 15 and 29 are provided with a cable production speed, a finished outer diameter value of the cable, an outer diameter value of the conductor, a distance from the extruder to the outer diameter measuring head, and a start-up. Information (work data) such as time and fall time is input, and this information is used for automatic start-up and outer diameter control of the extrusion tandem line. The automatic start-up device 4 and the outer diameter controllers 15 and 29 output to the driver a drive signal in which the cable speed of the take-off machine and the screw speed of the extruder are corrected based on the outer diameter deviation value and these information. Has become. Thereby, the output of the driver is controlled so that the deviation value of the outer diameter of the product cable manufactured in each extrusion line is reduced. Further, the extrusion tandem line is automatically accelerated from a setup speed to a steady speed based on information input in advance.

The operation of the extrusion tandem line shown in FIG. 1 will be described.

The take-off drive motor 9 of the take-off machine is driven by a take-off drive driver 8. In addition, NO. The extrusion drive motor 11 of the main extruder is NO. It is driven by one extrusion drive driver 10. Drive signals V4 and V3 to the drivers 8 and 10 are provided from the automatic start-up device 4. The automatic starter 4 has a master setting device 1, a take-up ratio setting device 2 and a NO. 1 A voltage signal (take-off speed command value V1, extrusion speed command value V2) via the push-out ratio setting device 3 is input. Using the master setting device 1, the setup speed can be set during setup before the extrusion tandem line is started. The outer diameter of the product cable 5 is measured by the outer diameter measuring head 6, and the deviation value of the outer diameter obtained by the outer diameter measuring device 7 is input to the automatic riser 4. The automatic start-up device 4 converts the deviation value and the voltage signal and work data such as an outer diameter set value, a take-up speed, a screw rotation speed of the extruder, a start-up time, and a fall time which are input in advance using a numeric keypad or the like. The drive signal calculated based on the output is output to each of the drivers 8 and 10.

On the other hand, NO. 2 main extruder and NO. The extrusion drive motor 19 and the extrusion drive motor 31 of the three main extruders are
Speed control is performed by regarding a take-up machine drive signal V4 output to the take-up drive driver 8 to drive the take-up drive motor 9 of the take-up machine as a master speed command value. That is, the outer diameter controllers 15 and 29 are provided with the take-up machine drive signal V4 output from the automatic starter 4 and the operational amplifiers 16 and
27, the master speed command values V5 and V10 amplified by NO. 2 extrusion ratio setting device 17 and NO. (3) The extrusion speed command values V6 and V11 adjusted by the extrusion ratio setting device 28 are input, and the product cables 12 and 24 are measured by the outer diameter measuring heads 13 and 25 and the outer diameters determined by the outer diameter measuring devices 14 and 26. The diameter deviation value has been entered. Outer diameter controller 15, 29
Is a drive signal V obtained by comparing these input signals.
7, V13 is NO. 2 extrusion drive driver 18 and NO.
3 It outputs to the extrusion drive driver 30. In this way,
NO. 2 main extruder and NO. The three main extruders are speed controlled. NO. 2 Regarding the sub-extruder attached to the main extruder, the drive signal V7 output from the outer diameter controller 15 is regarded as a master speed command value, and this drive signal V7 is amplified by the operational amplifier 20 to increase the master speed. The command value V8, the master speed command value V8 is adjusted by the ratio setting device 21 to obtain the sub-extruder drive signal V9. Drive. Thereby, the speed of the sub-extruder is controlled.

The optimum conditions for the automatic start-up according to the present invention are as follows. First, it is preferable to start the automatic start-up when the outer diameter of the product cable is stabilized by manually accelerating from the stopped state to the setup speed. Conventionally, the speed was manually adjusted at the time of startup, so it was not easy to prevent the measured value of the outer diameter of each product cable from deviating from a specified value. Since the speed control based on the result is performed, the outer diameter of the product cable is stabilized even at the time of start-up, and the generation of waste wire is suppressed. Further, by performing the automatic startup, the operator is released from troublesome speed adjustment work.

In the present invention, since the speed of the take-off machine or the extruder is voltage-controlled, a linear body sending device (not shown)
Can be controlled similarly. In this case, the speed of the delivery device is controlled based on the deviation value of the output of the potentiometer or the like attached to the dancer device.

[0021]

The present invention exhibits the following excellent effects.

(1) The outer diameter can be controlled with high precision, and the outer diameter of the manufactured cable can be kept constant and the product quality can be improved.

(2) From start-up to stop of the extrusion tandem line is automated.

(3) Since the cable is manufactured with high precision, waste of the extruded material is reduced, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is an electric diagram of an extrusion tandem line showing one embodiment of the present invention.

[Explanation of symbols]

 1 Master setting device 2 Pickup ratio setting device 3 NO. 1 Extrusion ratio setting device 4 Automatic start-up device 5, 12, 24 Product cable 6, 13, 25 Outer diameter measuring head 7, 14, 26 Outer diameter measuring device 8 Pulling drive driver 9 Pulling drive motor 10 NO. 1 Extrusion drive driver 11 Extrusion drive motor 16, 20, 27 Operational amplifier 17 NO. 2 Extrusion ratio setting device 18 NO. 2 Extrusion drive driver 19 Extrusion drive motor 21 Secondary extrusion ratio setting unit 22 Secondary extrusion drive driver 23 Secondary extrusion drive motor 28 NO. 3 Extrusion ratio setting device 30 NO. 3 extrusion drive driver 31 NO. 3 Extrusion drive motor

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shigeru Umehara 5-1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture F-term in the Hidaka Factory, Hitachi Cable, Ltd. 4F207 AD03 AD15 AG03 AG14 AH35 AP11 AR08 KA01 KA17 KA17 KB18 KK23 KM01 KM02 KM12

Claims (2)

[Claims] 1. A product cable is manufactured by coating an extruded material on a linear body by an extruder in each of a plurality of extrusion lines,
When starting up an extrusion tandem line that collectively pulls out the product cables of each extrusion line with one take-off machine, set the master speed command value of the extrusion tandem line with a master setting device in any one of the extrusion lines, The ratio of the take-off speed command value to the master speed command value is set by a take-off ratio setting device, the ratio of the extrusion speed command value to the master speed command value is set by an extrusion ratio set device, and the outer diameter measuring device is used to set the product cable. The outer diameter is measured to determine a deviation value of the measured outer diameter from a preset outer diameter target value, and the outer diameter of the product cable is determined based on the deviation value, the take-off speed command value, and the extrusion speed command value. A drive signal is given to each of the take-off machine and the extruder so as to stabilize the diameter target value, and in another extrusion line, the ratio of the extrusion speed command value to the take-off machine drive signal is determined by an extrusion ratio. Set by the setting device, measure the outer diameter of the product cable by the outer diameter measuring device to determine the deviation value of the outer diameter measurement value with respect to the preset outer diameter target value, this deviation value and the take-off machine drive signal and A method for automatically starting up and controlling an outer diameter in an extrusion tandem line, wherein a drive signal is supplied to an extruder so that the outer diameter of a product cable is stabilized at an outer diameter target value based on an extrusion speed command value. 2. An extrusion line having a plurality of extruders,
2. The method according to claim 1, wherein one extruder is used as a main extruder, and a ratio to a drive signal to the main extruder is set by a ratio setting device to adjust a drive signal to another sub-extruder. Method for automatic start-up and outer diameter control in an extrusion tandem line.