JPS6337055A - Pressure roll controlling method for winder and device thereof - Google Patents

Abstract

PURPOSE:To prevent lug slippage, wrinkles, etc., in a mill roll part from occurring, by performing pressure roll control under optimum wind diameter setting to be secured by thickness setting of a strip work and air rolling quantity setting. CONSTITUTION:Film speed out of a speed detector 10 and winding revolution out of a revolution detector 11 are inputted into a wind diameter computing element 17, operating a wind diameter, and the operated value is inputted into an adder-subtractor 16. Wind diameter value out of this computing element 17 is compared with reference setting value of the wind diameter at the adder- subtractor 16, finding the wind diameter deviation. The wind diameter deviation is amplified by an amplifier 3, the amplified signal is transmitted to an electro- pneumatic converter 24, adjusting the extent of compressed air, and this adjusted compressed air is transmitted to an air cylinder 5, operating this air cylinder 5, then a movable arm 6 is rocked while a pressure roll 7 is pressed to a mill roll 1, thus pressure control takes place.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to a winding machine applied to, for example, a biaxially stretched film manufacturing device, a non-stretched film manufacturing device, a winding device for paper, cloth, etc. This invention relates to a roll control device.

(Prior art) Below, taking a film manufacturing device as an example, we will explain the conventional -
Let's talk about the winding device.

Fig. 4 shows an example of a pressure control device for a pressure roll in a conventional winding device. a movable arm 6 which is swung by an air cylinder 5 of a pressure regulating device rotatably mounted with a pressure regulator 7; a pressure reducing valve 4 which adjusts the air pressure which operates the air cylinder 5; and a widening device 3 which operates the pressure reducing valve 4. and a pressure roll surface pressure adjustment system consisting of a command circuit and a pressure roll surface pressure adjustment system.

Now, in Fig. 4, the mill roll 1 is
By rotating the pressure roll 7 and amplifying the pressure adjustment signal (constant signal from the beginning to the end of winding) of the pressing force of the pressure roll 7 with the amplification device 3, and operating the pressure reducing valve 4 by the amplified signal. , adjust the compressed air, send it to the air cylinder 5 which is a pressure adjustment device, operate the air cylinder 5, swing the movable arm 6, press the roll 7 against the mill roll 1, A film 9 is wound up via a guide roll 8. This pressure control has the following problems because the winding is always performed with a constant pressing force initially set by the air cylinder 5 from the beginning to the end of the winding.

That is, in the conventional winding device, as the winding diameter of the mill roll 1 increases, the amount of air entrained also increases, causing wrinkles and sagging at both ends of the roll.

In the film winder shown in FIG. 4, in order to obtain the optimum pressure, it is necessary to detect the winding diameter of the mill roll 1 and correct the pressure of the press roll 7 as the winding diameter increases. Further, the amount of pressure correction had to be changed depending on the properties of the film 9 (resin, unstretched film, biaxially stretched film, etc.). Furthermore, as the mill roll 1 becomes thicker, it becomes necessary to compensate for the decrease in the pressing force of the press roll 7 due to the movement of the center of gravity of the devices constituting the press roll 7 and the movable arm 6. For these pressure corrections, pressure control that uses linear taper characteristics to correct pressure as the roll diameter increases is not sufficient, and as a result, the ends of the mill roll may have misalignment (Fig. 2), wrinkles, or bumps (Fig. 3). was occurring.

(Problems to be Solved by the Invention) The present invention attempts to solve problems such as wrinkles and misalignment of edges at both ends of the roll, which occur in conventional winding devices as the winding diameter increases.

(Means and effects for solving the problem) For this reason, the present invention provides a winding machine that winds up a roll of a belt-like object such as a film, which is formed by being wound around a core, while pressing the roll of the belt-like object with a pressure roll. In the press roll control method, a preset strip thickness and a preset air entrainment amount (thickness of the air layer)
The pressing force of the pressure roll is controlled so that the winding is carried out with a predetermined amount of air from the start to the end of the winding under the optimum winding diameter setting obtained from the actual speed of the belt. is used as a means and action for solving problems.

The present invention also provides a press roll that presses a roll of a strip-like material such as a film wound around a core, a swing arm that rotatably supports the press roll, and a swing arm connected to the arm that presses the press roll. In a winding machine consisting of a pressure adjustment device that adjusts the pressing force, a winding diameter calculator that calculates the winding diameter of the roll of a strip, a preset strip thickness setting device, and an air entrainment amount setting device are used to determine the total thickness. The device consists of a set winding diameter calculator that calculates the optimal winding diameter setting based on this, film speed, and winding start signal, and an adder/subtractor that calculates the winding diameter deviation. It is meant as a means.

(Example) Hereinafter, an example in which the present invention is applied to a film manufacturing apparatus will be described based on the drawings.

FIG. 1 shows an embodiment of the present invention, in which 9 is a running film, 1 is a mill roll wound up via a guide roll 8, and is driven by a variable speed motor 3. There is. Further, a rotation speed detector 11 that engages with the variable speed motor 2 and detects the rotation speed of the motor 2 is provided.

10 is a speed detector for detecting the winding speed of the film, and 7 is a pressure roll, which is rotatably supported by a movable arm 6 that swings by an air cylinder 5 that is a pressure force adjustment device. 24 is an electric/pneumatic converter that adjusts the compressed air sent to the air cylinder 5. Note that 3 is an amplifier. The members indicated by these symbols 1.2, 3, 24.5 to 11 constitute a winding section.

A winding diameter calculator 17 calculates the winding diameter of the mill roll 1 based on the signals from the speed detector 10 and the rotation speed detector 11.
, the speed detector 1 is used to determine the set winding diameter of the mill roll 1.
0, film thickness setting device 12, air insertion position setting device 13
and a set winding diameter calculator 18 that calculates the set winding diameter by inputting signals from the winding start signal 14, etc., and uses the output signal of the set winding diameter calculator 18 as the reference setting value of the set winding diameter. input to the adder/subtractor 16, and at the same time the winding diameter calculator 17.
The feedback value of the winding diameter is also input to the adder/subtractor 16, where the winding diameter deviation is determined, and the deviation signal is sent to the amplifier 3 of the winding section. Among these members, symbols 12°13, 14, 16.
The press control device 20 is constituted by each device shown in 17.18.

Next, to explain the operation of the embodiment shown in FIG.
0 and a guide roll 8, and is wound onto a core 19 driven by a variable speed motor 2.

At this time, the pressing force of the pressing roll 7 is adjusted as follows.

Film speed from speed detector 10 and rotation speed detector 11
The winding rotation speed is input to the winding diameter calculator 17 to calculate the winding diameter, and the calculated value is input to the adder/subtractor 16.

On the other hand, the film thickness setting device 12 sets the film thickness, and the air entrainment amount setting device 13 sets the thickness of the air layer between the wound films (the amount of air entrainment in each layer is set constant). The 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. , and inputs the calculated value to the adder/subtractor 16 as the standard setting value of the winding diameter.

This adder/subtracter 16 uses the winding diameter value (
The winding diameter feedback value) is compared with the reference setting value of the winding diameter (set winding diameter value) to obtain a winding diameter deviation value (winding diameter deviation value = set winding diameter value - winding diameter feedback value). The winding diameter deviation value is amplified by the amplification device 3, the amplified signal is sent to the electric/pneumatic converter 24 to adjust the compressed air, and this is sent to the air cylinder 5, which is a pressure adjustment device. , the air cylinder 5 is operated to swing the movable arm 6 and press the press roll 7 against the mill roll 1, thereby controlling the press.

That is, controlling the pressure so that the winding diameter becomes the set winding diameter in this way results in controlling the amount of air entrainment (thickness of the air layer).

Therefore, this pressure control is a method for directly controlling the amount of air entrainment (thickness of the air layer).

In addition, as another embodiment, a Taber setting device or the like may be added to the above embodiment, thereby controlling the set value of the air intake amount with arbitrary characteristics such as gradually increasing or decreasing the set value from the beginning of winding to the end of winding. You will be able to do this.

(Effects of the Invention) As explained above in detail, the present invention is capable of winding by controlling the pressure roll under the optimal winding diameter setting obtained by setting the thickness of a strip of film or the like and setting the amount of air entrainment. By controlling the amount of air entrainment (thickness of the air layer) of the strip to be taken at a constant level, there is no occurrence of edge displacement or wrinkles in the mill roll part, and it is possible to obtain rolled products of film and other strips with good winding appearance. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of a pressure roll control device showing an embodiment of the present invention, Figs. 2 and 3 are perspective views showing the winding state of a mill roll by a conventional device, and Fig. 4 is a system diagram of a press roll control device showing an embodiment of the present invention. It is a system diagram of a press control device. Explanation of the main parts of the figure - Mill roll 6 - Movable arm 7 - Press roll. 10--Speed detector 11--Rotation detector 12--Film thickness setting device 13--Air entrainment amount setting device 14--Winding start signal 16-Addition/subtraction device 17--Reel diameter calculator 18-Setting winding diameter calculator

Claims (2)

[Claims] (1) In a press roll control method for a winder that winds up a roll of a strip such as a film that is wound onto a core while pressing the roll of the strip with a pressure roll, the thickness of the strip is set in advance. , preset air entrainment amount (thickness of air layer)
and a winding machine that controls the pressing force of a pressure roll so that the winding is carried out with a predetermined air intake amount from the start of winding to the end of winding under the optimum winding diameter setting obtained by the actual speed of the strip. Pressure roll control method. (2) A pressure roll that presses a roll of a strip of film or the like formed by being wound around a core, a swinging arm that rotatably supports the pressure roll, and a pressing force of the pressure roll that is connected to the arm. The total thickness is determined using a winding diameter calculator that calculates the winding diameter of the roll of the strip, a strip thickness setting device that is set in advance, and an air intake amount setting device, and then using this, the film speed, and the winding start signal. A press roll control device for a winding machine, comprising a set winding diameter calculator for calculating an optimum winding diameter setting, and an adder/subtractor for calculating a winding diameter deviation.