JPH06271154A - Pressure roll controlling method for winder and device thereof - Google Patents

Abstract

PURPOSE:To obtain a film wound product whose appearance is favorable by providing a variable damper on the moving arm of a pressure roll, and control ling the coefficient of damper of the variable damper according to the deforma tion amount and the deformation cycle of a mill roll, so as to prevent the bound of the pressure roll. CONSTITUTION:A variable damper 15 is paralleley connected to a cylinder 5 for a pressure roll in relation to a moving arm 6, and the deformation amount per one rotation of a mill roll is detected by a displacement detecting unit 4 provided on the moving arm 6. And the deformation cycle of the mill roll 1 is found from a revolution detecting unit 11 of the mill roll 1. And the coefficient of damper is calculated by a damper coefficient calculating unit 22 on the basis of the signal from the displacement detecting unit 4 and the deformation cycle of the mill roll 1, and the coefficient of damper of the variable damper 15 is controlled on the basis of this result.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a pressing roll of a winder and a device therefor which can be used, for example, in a biaxially stretched film manufacturing apparatus, a non-stretched film manufacturing apparatus, and also in a winding apparatus for paper, cloth and the like. It is about.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional pressure roll control device. In FIG. 4, 9 is a running film, 1 is a mill roll wound around a guide roll 8, and is driven by a transmission motor 2. Further, a rotation speed detector 11 that engages with the transmission motor 2 and detects the rotation speed of the motor 2 is provided. Reference numeral 10 is a speed detector for detecting the film winding speed, 7 is a pressing roll, and the movable arm 6 is swung by an air cylinder 5 which is a pressing force adjusting device.
It is rotatably supported by. Reference numeral 24 is an electro-pneumatic converter for adjusting compressed air sent to the air cylinder 5. In addition, 3 is an amplifier. These symbols 1, 2, 3, 2
Each of the members indicated by 4, 5 to 11 constitutes a winding section.

Further, this apparatus uses a roll diameter calculator 17 for calculating the roll diameter of the mill roll 1 based on signals from the speed detector 10 and the rotation speed detector 11, and the speed detector 10 for obtaining the set roll diameter of the mill roll 1. , A film thickness setting device 12, an air entrainment amount setting device 13, a winding start signal 14 and the like to input respective signals to calculate a set winding diameter 18
The output signal of the set winding diameter calculator 18 is input to the adder / subtractor 16 as a reference set value of the set winding diameter, and at the same time, the winding diameter feedback value from the winding diameter calculator 17 is also added to the adder / subtractor 16.
The winding diameter deviation is obtained here, and the deviation signal can be sent to the amplifier 3 of the winding section. And among these members, reference numerals 12, 13, 14,
The pressing control device 2 is constituted by the respective devices shown in 16, 17, and 18.
0 is configured.

The operation will be described below. The film 9 guided by a pre-process (not shown) is wound around the winding core 19 driven by the transmission motor 2 via the speed detector 10 and the guide roll 8. At this time, the pressing force of the pressing roll 7 is adjusted as follows. The film speed from the speed detector 10 and the take-up rotation speed from the rotation speed detector 11 are calculated as follows.
7, the winding diameter is calculated, and the calculated value is input to the adder / subtractor 16.

On the other hand, the film thickness setting unit 12 sets the film thickness, and the air entrainment amount setting unit 13 sets the thickness of the air layer between the films to be wound (the air entrainment amount of each layer is set to a constant value). Each setting signal is input to the set winding diameter calculator 18 to obtain the total thickness of the film and the air layer, and the set winding diameter is calculated from the film speed signal from the speed detector 10 and the winding start signal 14. Then, the calculated value is input to the adder / subtractor 16 as a reference set value of the winding diameter. The adder / subtractor 16 compares the winding diameter value (rolling diameter feedback value) from the winding diameter calculator 17 with the reference setting value (setting winding diameter value) of the winding diameter to obtain a winding diameter deviation value (winding). Diameter deviation value = set winding diameter value-rolling diameter feedback value). The winding diameter deviation value is widened by a widening device 3, and the widened signal is sent to an electro-pneumatic converter 24 to adjust compressed air, which is sent to an air cylinder 5 which is a pressure adjusting device. , The air cylinder 5 is actuated, the movable arm 6 is swung, and the pressing roll 7 is pressed against the mill roll 1 to perform pressing control. That is, the pressing control so that the winding diameter becomes the set winding diameter in this way results in controlling the air entrainment amount (the thickness of the air layer).

[0006]

However, in the conventional winding device, since the pressure roll control is not sufficient, the winding shape is deformed (not a perfect circle) as the winding diameter of the mill roll 1 increases, and the pressing force of the pressure roll is reduced. However, there is a problem that it is difficult to optimize the winding hardness. Further, in the conventional film winder, in order to improve the followability of the pressing roll according to the winding shape of the mill roll 1, a variable damper is connected in parallel with the cylinder 5 of the pressing force adjusting device,
It is necessary for the damper to follow the pressing roll with respect to the amount of deformation of the mill roll 1 for one rotation. Furthermore, the amount of deformation changes the rotation speed of the mill roll depending on the winding diameter, and the deformation cycle also changes. Therefore, the pressing roll bounces in the conventional pressing control, and the amount of deformation cannot be controlled sufficiently to optimize the winding hardness. Was difficult. The present invention has been proposed to solve the above conventional problems.

[0007]

Therefore, the present invention is directed to a pressure roll of a winder for winding a roll of a film or the like formed by winding it around a winding core while pressing the roll with the same. In the control method, a damper is arranged on the pressing roll, and the pressing force of the pressing roll is controlled to be substantially constant by adjusting the coefficient of the damper according to the roll diameter and the roll shape of the film-like strip. It will be,
This is a means for solving the problem. The present invention also relates to a pressing roll that presses a roll of a band-shaped material such as a film that is wound around a winding core, a swinging arm that rotatably supports the pressing roll, and a pressing roll that is connected to the arm. In a winder including a pressure adjusting device for adjusting a pressing force, the winder is engaged with the swing arm to prevent a pressing roll from being damped, and one roll of the film-shaped strip in a roll shape. A detector for detecting the amount of displacement per hit, and a damper coefficient calculation circuit for calculating the coefficient of the damper according to the roll diameter of the film-shaped band and the amount of displacement from the detector, and the roll diameter and roll shape. The coefficient of the damper is adjusted according to the above, and this is used as a means for solving the problem.

[0008]

According to the present invention, a variable damper is connected to a movable arm in parallel with a cylinder of a pressure roll control device, a deformation amount per one rotation of the mill roll is detected by a displacement detector provided on the movable arm, and the rotation speed of the mill roll is detected. The deformation cycle of the mill roll 1 is calculated from the above, the damper coefficient is calculated by the damper coefficient calculator, and the damper coefficient of the variable damper described above is controlled. Therefore, in this device, the damper coefficient is calculated by the deformation amount obtained by the signal of the displacement detector provided on the movable arm of the pressing roll and the deformation period obtained from the rotation speed of the mill roll at that time, and the result is calculated. Based on this, the damper coefficient of the variable damper is controlled to improve the followability of the pressing roll.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, 9 is a running film, and 1 is a mill roll wound around a guide roll 8, which is driven by a speed change motor 2. Further, a rotation speed detector 11 that engages with the transmission motor 2 and detects the rotation speed of the motor 2 is provided. 1
Reference numeral 0 is a speed detector for detecting the film winding speed, and 7 is a pressing roll, which is rotatably supported by a movable arm 6 which is swung by an air cylinder 5 which is a pressing force adjusting device.
Reference numeral 24 is an electro-pneumatic converter for adjusting the compressed air sent to the air cylinder 5, and 3 is an amplifier. Further, 15 is a variable damper supported by the movable arm 6, and further the displacement detector 4
Detects the amount of change of the movable arm 6, and is engaged with the rotary shaft of the movable arm 6. Reference numeral 21 is an amplifier. These symbols 1, 2, 3, 4, 5 to 11, 15, 21, 21
Each member indicated by 4 constitutes a winding section.

Further, the present apparatus is based on the signals from the speed detector 10 and the rotation speed detector 11, and a winding diameter calculator 17 for calculating the winding diameter of the mill roll 1 and a speed detector for obtaining the set winding diameter of the mill roll 1. 10, a film thickness setting device 12, an air entrainment amount setting device 13, a winding start signal 14, and the like.
The output signal of the set winding diameter calculator 18 is input to the adder / subtractor 16 as a reference set value of the set winding diameter, and at the same time, the winding diameter feedback value from the winding diameter calculator 17 is also added to the adder / subtractor 16.
The winding diameter deviation is obtained here, and the deviation signal can be sent to the amplifier 3 of the winding section.

On the other hand, in order to detect the amount of deformation per revolution of the mill roll 1, a signal from the displacement detector 4, a signal from the revolution number detector 11 for detecting the revolution number of the mill roll 1 at that time, and the winding diameter calculation. The winding diameter signal from the device 17 is input to the damper coefficient calculator 22. Based on these input signals, the damper coefficient calculator 22 obtains the deformation period and the amount of mill roll deformation, and sends a signal for adjusting the damper opening of the variable damper 15 to the amplifier 21. Of these members, the press control device 23 is configured by the devices denoted by reference numerals 12, 13, 14, 16, 17, 18, and 22.

Next, the operation of the pressure roll control device constructed as described above will be explained based on the embodiment shown in FIG. 1. The film 9 guided from the preceding step (not shown) is the speed detector 10 and the guide roll 8. It is wound around a winding core 19 driven by the transmission motor 2 via. At this time, the pressing force of the pressing roll 7 is adjusted as follows. The film speed from the speed detector 10 and the winding rotation speed from the rotation speed detector 11 are input to the winding diameter calculator 17, the winding diameter is calculated here, and the calculated value is input to the adder / subtractor 16. . On the other hand, in the film thickness setting device 12, the film thickness is the air entrainment amount setting device 1.
In No. 3, the thickness of the air layer between the films to be wound is set (the air entrainment amount of each layer is set to be constant), and each setting signal is input to the set winding diameter calculator 18. The set winding diameter calculator 18 calculates the total thickness of the film and the air layer based on the input signal, and calculates the set winding diameter from the film speed signal from the speed detector 10 and the winding start signal 14, The calculated value is input to the adder / subtractor 16 as a reference set value of the winding diameter.

In the adder / subtractor 16, the winding diameter calculator 1
The winding diameter value (rolling diameter feedback value) from 7 and the winding diameter reference setting value (setting winding diameter value) are compared to obtain a winding diameter deviation value (rolling diameter deviation value = set winding diameter value−winding). Diameter feedback value). The winding diameter deviation value is widened by a widening device 3, and the widened signal is sent to an electro-pneumatic converter 24 to adjust compressed air, which is sent to an air cylinder 5 which is a pressure adjusting device. The air cylinder 5 is operated, the movable arm 6 is swung, and the pressing roll 7 is pressed against the mill roll 1. Further, the shape of the mill roll 1 is generally not a perfect circle and is somewhat deformed. Therefore, in order to detect the amount of deformation of the mill roll 1 per revolution, the pressing roll 7 in contact with the mill roll 1 is detected.
The displacement detector 4 engaged with the movable arm 6 detects the amount of change. At the same time, the winding diameter value at that time is obtained from the signal from the winding diameter calculator 17, and the rotation speed detector 11 detects the rotation speed. Based on these signals, the damper coefficient calculator 22 determines the amount of displacement of the mill roll 1 for one rotation and the deformation cycle of the mill roll 1.

FIG. 2 shows the amount of deformation and the deformation cycle of the mill roll thus obtained. As is clear from the figure, when the winding diameter is small, the deformation cycle is short, and as the winding diameter is large, the deformation cycle is long. FIG. 3 shows a circuit configuration of the damper coefficient calculator 22. The deformation amount and the deformation cycle of the mill roll 1 are obtained by taking in a signal from the displacement detector 4 at a sampling cycle every time the winding diameter is increased by 50 mm to obtain the current winding diameter. The damper coefficient is calculated in accordance with the above, and a damper coefficient control output command signal is sent to the amplifier 21. The variable damper 15 adjusts the damper opening according to the signal sent from the amplifier 21 to follow the deformation of the mill roll 1 by the pressing roll. As described above, in the present invention, the control of the air cylinder 5 which is the pressing force adjusting device and the control of the variable damper 15 are combined to perform the control of the air entrainment amount of the mill roll and the follow-up control for the deformation of the mill roll 1. I can.

[0015]

As described above in detail, according to the present invention, the movable arm of the pressing roll is provided with the variable damper, the deformation amount and the deformation cycle of the mill roll are obtained, and the damper coefficient of the variable damper is controlled according to the winding diameter. As a result, the bounce phenomenon of the pressing roll can be prevented, wrinkles (coccation) in the flow direction of the mill roll can be prevented, and a film-rolled product having a good winding appearance can be obtained.

[Brief description of drawings]

FIG. 1 is a system diagram of a pressure control device according to an embodiment of the present invention.

FIG. 2 is a deformation cycle diagram of the winder mill roll.

FIG. 3 is a block diagram of a damper coefficient calculation circuit.

FIG. 4 is a system diagram showing a conventional pressing control device.

[Explanation of symbols]

 1 Mill Roll 2 Variable Speed Motor 3 Magnifier 4 Displacement Detector 5 Cylinder 6 Movable Arm 7 Pressing Roll 8 Guide Roll 9 Film 10 Speed Detector 11 Rotation Speed Detector 12 Film Thickness Setting Device 13 Air Entrainment Setting Device 14 Winding Start signal 15 Variable damper 16 Adder / subtractor 17 Roll diameter calculator 18 Set reel diameter calculator 19 Core 21 Magnifier 22 Damper coefficient calculator 23 Push control device 24 Electric / pneumatic converter

Claims (2)

[Claims] 1. A method of controlling a pressure roll of a winder, wherein a roll of a film or the like formed by being wound around a winding core is pressed by the pressure roll while the roll is wound, and a damper is attached to the pressure roll. The pressing force of the winder is characterized in that the pressing force of the pressing roll is controlled to be substantially constant by adjusting the coefficient of the damper according to the roll diameter and the roll shape of the band-shaped material such as the film. Roll control method. 2. A pressing roll for pressing a roll of a band-shaped material such as a film wound around a winding core, a swinging arm for rotatably supporting the pressing roll, and a pressing roll connected to the arm. In a winder including a pressure adjusting device for adjusting a pressing force, the winder is engaged with the swing arm to prevent a pressing roll from being damped, and one roll of the film-shaped strip in a roll shape. A detector for detecting the amount of displacement per hit, and a damper coefficient calculation circuit for calculating the coefficient of the damper according to the roll diameter of the film-shaped band and the amount of displacement from the detector, and the roll diameter and roll shape. A press roll control device for a winder, wherein the coefficient of the damper is adjusted according to the above.