JPS6175763A - Take up method for film - Google Patents

Abstract

PURPOSE:To provide good performance of take up of a film, which otherwise is hard to wind up, by winding a plurality of film strips fed from the same line on cores simultaneously, and therein feeding back the output of a tension control system to the speed control system. CONSTITUTION:When a plurality of film strips are to be wound up on cores 1 driven by motor m, the film strips are fed simultaneously through a receipt roller 4 driven at a constant speed by a line drive motor. The revolving speed of each core 1, i.e. the speed of each drive motor m, is controlled by a speed control system 21 in accordance with deviation of the take up speed signal V given by a speed sensor 17 from the speed setting signal Sv for line drive motor. Also the speed control system 21 is adjusted according to the deviation of the take up tension from a tension sensor 12 determined in the tension control system 22 from the set value St for tension control set by a wind width setting device 24 into which the output of a pattern generator 23 is entered.

Description

[Detailed Description of the Invention] a. Industrial Application Field The present invention relates to a method for winding a film, and more specifically, an improvement in a method for simultaneously winding multiple strips of film that are rolled from the same line at a constant speed. Regarding.

b. Conventional technology and problems Winding multiple strips of film into rolls with simultaneous VC system As a process, '/11' For example, one raw film is slit with ME strip film VC and wound into individual film rolls. There is a process.

Conventionally, a so-called center drive system has been generally used as a winding system in the film slitting process.

In this center drive system, as schematically shown in FIG. 1, the core 1 is directly driven, and the touch a-2 that applies contact pressure
2 is free (!2Ik&) and is driven to rotate in contact with the film roll 3.

As shown in FIG. 2, the take-up roller 4 is connected to the line drive motor M
At L, each film strip is simultaneously fed to the winding section at a constant speed. - Each core 1 is rotatably supported by a halter 6 attached to a winding arm 5, and is connected to each winding arm 5 from a core drive motor MR through a drive shaft 7 through each gear ring 8 and each powder clutch 9. Built-in bell
- rotated by driving the holder 6 by the mechanism 10;

The drive shaft rotates 70 times, giving rotational force to each core.
The speed of each driven core is always set to be slightly higher than the speed of the take-up a-ra 4. This speed gap is absorbed by the slip of each powder clutch 9, and each film strip has a clutch 9. A tension corresponding to the slip of the clutch 90 is generated, and the film winding tension can be adjusted by changing the slip of the clutch 90. By adopting such a winding method, the machine at each winding position 7 All differences in winding torque due to differences in resistance and physical properties of the film are absorbed by the clutch 9.
In the end, by changing the tension of each film, the winding speeds are kept constant. Therefore, if the film tension level can be set high, or if the tension fluctuation noise can be suppressed to a large extent, the uniform speed of each winding position can be maintained even if there is a slight difference between the positions. Thin films or special surfaces that need to be kept clean (slippery).

The tolerance range for tension fluctuations is small for films with slip-off and slip-off, and depending on this method, it is difficult to successfully wind the film at each winding position simultaneously due to differences in the performance of the clutch itself.

Regarding this point, for example, as shown in FIG. It has also been proposed that the core is driven by an individual auxiliary motor mA and the speed difference between each core is adjusted by an auxiliary moke mA'''C, but in such a so-called surface center drive system, the winding speed is increased. In addition, there is a problem that the frictional line maintenance between the surface drive a-roller 2A and the film has a subtle effect on the film winding tension, and it is difficult to adjust the speed of the individual motor mA with the IJA'IIJJ roller 2A. However, there is a problem in that it is very difficult to set the winding tension.

By the way, Japanese Patent Application Laid-Open No. 11859-36063 describes a method of controlling the winding tension by detecting the tension immediately before cooling, and Japanese Patent Application Laid-Open No. 59-36064 describes a method for controlling the winding tension of a typical sheet material. A method has been proposed in which the winding force of each of the other nine rolls is controlled by detecting the winding force. Although each of these methods is effective, they do not solve the above-mentioned problem.

C1 Purpose of the Invention The present invention has been made in view of the above-mentioned problems, and it is possible to reduce the amount of film that is difficult to wind by winding the film while controlling the winding tension. The present invention provides a winding method that can form a good film roll even when the film is heated.

d0 Structure 1 of the invention Operation and effect The objects mentioned in the previous section are achieved by the following invention. In other words, the present invention provides a speed control system for controlling the winding speed for each core and a winding tension when winding a film of one summer-rowed Shiba supplied from the same line onto a plurality of individually driven cores. A tension control system is provided to control the tension, and the control output of the 1iI system is fed back to the speed control system, and the speed control system is set to a common common setting IIKft for all cores, and the speed control system drives and controls the cores. This is a film winding method characterized by:

This will be explained in detail below.

FIG. 4 shows the method of the present invention; l! This is a schematic side view of a winding device, and its overall construction is almost the same as the conventional one shown in FIG. 2, and the same parts are designated by the same number. Figure 5 shows the winding according to the present invention? ! It is a Glock diagram of an i-control device.

In FIG. 4, each core 1 is pivoted independently for each position by a separate drive motor m. The touch roller 2 is rotatably supported by a spring-like elastic support 11, and since the displacement of this support 11 is proportional to the winding tension of the film, this displacement detector is referred to as a tension detector 12. The elastic support 11 is attached to an arm 13 of the touch roller 2, and the arm 13 is pulled by an air cylinder 15 via a fulcrum 14 to apply contact pressure between the touch roller 2 and the film roll 3. do.

The arm 13 has a contact pressure p1. Output device 16 is attached. The aforementioned tension detector 12. As the Qin pressure detector 16, any displacement or force detection means can be used, such as a differential transformer, an a-docel, or pressure measurement using a piezoelectric element. In addition, as a method for detecting tension and contact pressure, a means for directly detecting the tension of the film instead of measuring the displacement of the touch roller 2 and stress on the arm 13, or a means for directly measuring the contact pressure is used. However, it is currently difficult to find a practical means for such a method.

Note that 17 in the figure is a speed detector for detecting the speed of the motor m, that is, the winding speed, and a known speed detector such as a pulse generator or a tachometer can be used as is.

And tension detector 12. Based on the speed detector 17, the winding control device 20 is constructed as shown in FIG. The winding control device 20 includes a speed control system 21 that controls the winding speed.
and a tension control system 22 that controls the winding tension. The tension control system 22 feeds back the tension signal T from the tension detector 12 in the same manner as well-known foot-to-clock control, calculates the deviation ΔT from the tension setting value St, and uses the control calculator 19 to perform known control calculations such as PIE) calculation. and control output O
It is designed to output t. The speed control system 21 is
The winding speed signal V from the speed detector 17 is fed back, the deviation from the common setting value Sv of the winding speed common to all cores is determined, and the control output Ou is obtained by the control calculator 18 for winding speed control. The configuration is based on feedback control, and the control output 01 of the tension control system 220 is fed back to the front of the control calculator 18. The drive motor m is controlled by the take-up speed control system 210 output 01/-.

Therefore, the Katori tension is controlled by the cascade system #eC in which the winding speed signal thread 21 is made into a minor loop.

Note that the common set value Sv of the winding speed is the line speed 1-
The signal is obtained by dividing the signal by the winding diameter signal from the winding diameter detector provided in the representative core. Therefore, just set the line speed and the winding will be adjusted accordingly! 4! The L loading degree is set for all cores, and winding with good uniform speed is possible in accordance with a common set value for all cores.

- 10,000, the tension control setting value St is determined by the tension of each core using a pattern signal pt that changes in a predetermined pattern according to the winding diameter from the pattern generator 23 common to all cores. 1i (supplied to the J-type winding 1-off setting device 24, and setting l1fL according to the winding width for each core. Therefore, the basic pattern is common to all cores and is uniform. Not only can the shape be secured, but also the width of each core can be changed.

Now, the method of the present invention using such an apparatus will be described. First, the take-up roller 4 is driven at a constant speed by a line drive motor ML as in the conventional method, and supplies each film strip to each winding device (each position) at a constant speed.

−1, the rotation speed of the core at each winding position, that is, each f
The speed of the f1d motor m is controlled by a speed control system 21 to synchronize with the film supply speed, or in other words, the speed of the take-up roller, but during this control, the speed setting signal of the line drive motor ML is sequentially detected. Since the set value is the signal divided by the winding diameter, the core rotation speed decreases as the winding diameter changes, increasing the line drive speed, that is, the take-up a.
- Attuned to la speed.

Follow. On the other hand, regarding the winding tension control, the tension control system 22 controls the set winding tension via the speed control system 21. 1ilJ m is done. In other words, the tension is equal to the set value St
Fine adjustment is made so that if the value is higher, the drive motor m is decelerated, and conversely, if the value is higher, the drive motor m is sped up. Therefore, stable tension control can be performed while maintaining the same line speed as A, and stable winding can be performed even at a low tension level. Seventh, since the violation setting value Sv is common to all cores, the uniform speed of each core is good and stable winding can be performed. In addition, since the basic pattern of the tension value is common to all cores, it is possible to form a good film roll with the bottom winding points aligned, which is of great value in the 7th and 4th process.

In the above explanation, the applicability of the present invention to the slitting machine of synthetic resin film was mainly described, but the present invention is not limited to such an example. It can be used in all processes of winding.

Further, although the speed control system 911 is shown as having a single loop, the control loop may be a minor loop as is well known, and the line speed signal is related to the line supply speed. It is clear from the spirit of the present invention that it is sufficient.

In this way, the present invention has various functions. Implementation at Pu-Zou is 15T1
It is very useful and has a wide variety of applications.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the traditional film winding system.
Fig. 2 is a simplified schematic plan view, Fig. 3 is a schematic side view showing another conventional method, and Fig. 4 shows the original Ming Banshiki.
A schematic side view, FIG. 5, is a block diagram of the winding control device. 1 is the core, 2 is the touch roller, 3 is the film roll, 4
12 is a tension detector. 16 is a contact pressure detector, ML is a line drive motor. m is an individual (core) drive motor, 21 is a speed control system, 22
23 is a tension control system and a pattern generator. Figure 1 Figure 3 Figure 2 Hair diagram

Claims (1)

[Claims] 1. A speed control system that controls the winding speed and winding tension for each core when winding multiple strips of film supplied from the same line onto a plurality of individually driven cores. A tension control system is provided, and the control output of the tension control system is fed back to the speed control system, and a common setting value common to all cores is set in the speed control system, and the speed control system drives and controls the cores. How to wind the film. 2. The film winding method according to claim 1, wherein the common set value is calculated from a line speed signal and a representative core winding diameter signal.