JPS62215452A - Automatic cutting and winding device for strip material such as film - Google Patents

Abstract

PURPOSE:To adsorb film onto a core for winding therearound and thereby to obtain effective cutting and winding of the film with no damage to and loss of the film, by cutting the film and simultaneously imparting electrostatic charge to the film. CONSTITUTION:When a mill roll 14 on a right core 12 is fully wound, a lower arm 23 is swung upward to a waiting position, and an intermediate arm 26 is swung downward to cause film 11 to be pressed against a new core 13 by a press roll 25. At the same time, an upper arm 29 is swung downward to press down the film 11 by a pair of pressors 30, and the film 11 is cut by a cutter 22 attached to the extreme end of the lower arm 23. At this time, the cutting edge of the film 11 is charged by electrostatic charge imparting means 20 so as to be adsorbed onto the new core 13 and wound therearound. This permits effective cutting and winding of the film 11.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to, for example, biaxially stretched film manufacturing equipment, unstretched film manufacturing equipment, etc. The present invention relates to an automatic cutting and winding device for rewinding a strip of film or the like, which can also be used to wind up paper, cloth, etc.

(Prior art) When winding a strip-like material such as a film (hereinafter referred to as film), there is a method in which the core is wound directly onto the core without using adhesive tape or other adhesive (hereinafter referred to as tapeless winding). The one on the right is attracting attention from many quarters because there is no damage to the mill roll inner layer film due to unevenness on the core surface caused by adhesive tape, etc., and there is no need to remove residual adhesive when reusing the core. However, since there are problems such as scratches occurring at the cut edges of the film, there has been a strong desire to develop a more perfect version.

Below, an overview of the conventional tapeless winding machine will be explained with reference to Figs. 5 to 7. ■ indicates the film, 2 indicates the core, and the core 2 is rotated in the direction of arrow A in the figure by a drive device (not shown) on the turret 4. It is equipped to do so.

3 is the guide roll, which is connected to the core 2 and 90 of the turret 4.
"It is rotatably supported by the end of the arm 4a provided at a distance. 5 is also a guide roll, but this guide roll 5 is supported rotatably by the film 1 supplying end of the frame 10. A wind-up roll 6 is provided across the intermediate portion between the guide roll 5 and the core 2, and rotates in the direction B in the figure. The other end is pivotally supported on the film winding side of the frame 10.

As described above, the winding roll 6 turns across the intermediate portion between the guide roll 5 and the core 2, and reaches the rear side of the core 2.

Reference numeral 8 designates a cutter, the other end of which is attached to the tip of an arm 9 which is also pivoted at a suitable position on the frame 10, and the arm 9 is swung in synchronization with the rotation of the winding roll 6 by a drive device (not shown). , the cutter 8 at the tip of the film 1
It is designed to cut.

Now, in Fig. 5, the film 1 is wound onto a core (not shown) attached to the other end of the turret 1-4, and the mill roll wound on the core has reached its full capacity. Then, the winding roll 6 turns in the direction of arrow B, and the film 1 wraps around the core 2, resulting in the state shown in FIG.

Next, the cutter 8 is lowered as shown in FIG.
Push it into part b between the two to finish winding.

However, in the conventional case, in order to wind up the cut film end a when rewinding to a new core,
As shown in FIG. 6, it was necessary to wrap the core 2 with the film 1 prior to cutting, but the film 1 was wound between the winding opening 1 6 and the guide roll 3 in FIG. In order to reach the state shown in Fig. 6 from the state shown in Fig. 5, an excessive force is applied to the film 1 in order to prevent breakage, meandering, wrinkles, etc. Therefore, it was necessary to gradually move the roll 6 over time.

However, the surface of the core 2 is not smooth like a smooth roll;
In addition, the surface speed of core 2 is set slightly faster than the film speed to prevent the film from sagging immediately after winding, so slippage occurs between film 1 and core 2, causing scratches on film 1. There was a risk that this would happen. Therefore, the portion abraded by the core 2 cannot be treated as a product, and the loss increases as the film speed increases.

Now, as shown in FIG. 7, the film 1 is supported by the core 2 and the guide roll 3, the arm 9 is lowered, and the cutter 8 enters and cuts the film 1 as described above. In addition,
Usually, the cutter 8 has a saw blade shape as shown in FIGS. 8 and 9.

In the conventional film winding machine shown in FIG. 5, in order to obtain a good cut surface of the film material, the cutter must be sharp and the operating speed of the cutter 8 must be increased as the film travel speed increases. When cutting, it was necessary to take measures such as increasing the tension of the film or providing means to support the film so that it would be difficult for the cutter to escape from being pushed by the cutter, but if these measures are not met, , as shown in FIG.
When winding around a new core, the strips of the cut portion 9 are bent or overlapped to create unevenness, and these unevenness wrap around the upper layer, giving the film 1 an uneven texture, and the film is rewound. The flatness of 1 will be lost and many defective parts will occur. The length of this defective cut l
However, as the running speed of the film 1 is faster and the cutter operating speed is slower, the tension of the film becomes smaller and the culm length becomes longer.

(Problems to be Solved by the Invention) The present invention attempts to solve problems in conventional winding machines for film and other strips, such as the occurrence of scratches on the cut edges of the film and the formation of unevenness in the cut portion. It is.

(Means for Solving the Problems) Therefore, the present invention provides a turret-type automatic cutting and winding machine that automatically cuts and winds a belt-shaped object such as a film using a presser roll, a presser member, and a cutter. It has an electrostatic charge applying means that applies an electrostatic charge to the cut end of a strip-shaped object such as a film, and a cutter and a pair of presser members are rotatably arranged opposite to the strip-shaped object, and at the cutting position. The presser member is configured so that it enters before and after the cutter while it is on standby, and this is used as a means to solve the problem.

(Function) When rewinding the film, the swinging arm swings, and the electrostatic charging means attached to the swinging arm applies an electric charge to the cut end of the film, and transfers the cut end of the film to the new core surface. Start winding at the same time as adhesion. Next, when cutting the film, the cutter and a pair of holding members facing each other with the film in between support the film and push it down in the canter direction, thereby increasing the tension of the film and cutting it.

(Example) The present invention will be described below with reference to the embodiments shown in the drawings. Figs. 1 to 3 show embodiments of the present invention, in which 11 is a film, 12.13 is a core, and the core 12.13 is a core. 13 is
A turret saw I/16 is mounted on the frame 19 so as to be rotatable in the direction C in the figure, and is pivotally supported at both ends thereof so as to be rotatable in the direction of the arrow A by a drive device (not shown). Further, arms 18.18 are protruded from both sides of the center of the turret 16, and guide rolls 17.17 are pivotally supported at each end of the arms 18.18. 14 is core 12
This is a mill roll on which the film 11 is wound.

Another film 28 is installed on the film 11 supply side of the frame 19, and the frame 28 has a kite roll 27 on the film feeding passage iS, and the frame 28 also has a kite roll 27 that oscillates about the same axis. Moving swinging arm 23.2
6 is pivotally mounted. A cutter 22 is attached to the tip of the swing arm 23. Further, the swing arm 26 is equipped with a presser roll 25 and an electrostatic charge applying means 20. Furthermore, an arm 29 that also swings about point E is pivotally attached to the tip of the swinging arm 26, and a pair of presser members 3 consisting of a presser bar 30a and a presser bar 30b are attached to the tip of the arm 29.
0 is installed. Further, an air blowing nozzle 30c may be formed in the holding member 30 so that the film end a is pressed against the core 13 by air as shown in FIG. The electrostatic charge applying means 20 is a known charging type using corona discharge, and uses an electrode portion of an electrostatic charge applying device. Note that illustration of the power supply section, wiring, etc. of the device is omitted.

Next, the operation will be explained in the case of tapeless winding of the film 11 using the apparatus according to the embodiment of the present invention as described above. FIG. Indicates the state when .

Then, the winding length is measured by a winding length counter (not shown), and when the winding length reaches the full volume, the arm 23 is activated to wait at the position shown in FIG. At the same time, the film 11 is pressed onto the new core 13, and the swinging arm 24 is lowered so that the pair of press members 30 press the film 11 in the direction of the cutter 22, increasing the tension of the film 11, and - Cut into.

At the same time as cutting, an electric charge is applied to the cut end a of the film from the electrostatic charge applying means 20, and the cut end a of the film is adsorbed to the core 13 and wound up, thereby performing automatic cutting and rewinding without tape. In addition, the fourth
The air blowing from the air blowing nozzle 30c in the figure is carried out at the same time as the electric charge is applied from the electrostatic charge applying means 20.

By employing such a configuration, as shown in FIG. 2, the stop position of the cutter 22 can be brought as close to the core 13 as possible in order to minimize the film edge a. In addition, by pivoting the arm 29 with a short arm length <, in to the front end of the arm 26, a small swinging motion can be achieved.
Enables high-speed cutting. Next, when the winding is completed, the arms 23 and 24 are activated to return to the state shown in FIG. 3, and the mill roll 15 and film 11 are wound on the new core 13.

Further, in the above embodiments, the presser roll 25 can be used as a lay-on roll for controlling the winding hardness of the mill roll.

Further, as the electrostatic charge applying means, a sending type electrostatic charge applying means may be employed. In addition, the presser bar 30a and the presser bar 30
The interval b may be made changeable to accommodate changes in the type and thickness of the film, and the air blowing nozzle may be provided separately from the presser member 30.

(Effects of the Invention) As described in detail above, according to the present invention, by applying an electric charge to the film at the same time as cutting the film, the film can be adsorbed to the core and wound.
In tapeless winding, there is no need to enclose the core with the film before cutting, and there is no film that is lost due to contact with the core at the end of mill roll winding and is scratched, and the yield of the film is greatly improved.

In addition, a pair of holding members that press the film against the cutter and a cutter that presses against the film and cuts it are placed facing each other with the film in between, so the pair of holding members increases the film tension during cutting. Moreover, since the pair of holding members presses the film so that it is difficult to escape from the cutter, the cut end of the film can be cut into a good shape. Therefore, the effect of 9 or more, which is effective in significantly reducing defective parts of the film when the film is rewound and used after being wound up on a mill roll, becomes more pronounced as the cutting and winding speed becomes higher.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are side views of an automatic cutting and winding device for strips such as films showing embodiments of the present invention in different operating states, and FIG. 4 shows another embodiment. Side view of main parts,
Fig. 5 is a side view of main parts showing the state of film winding by the conventional device, Fig. 6 is a view of the same as the above in preparation for rewinding, Fig. 7 is a view in the same as the above in the cutting state, and Fig. 8 is a plan view of the conventional cutter. FIG. 9 is a side sectional view of FIG. 8, and FIG. 10 is a plan view showing the shape of the cut end of the film by the conventional device. Explanation of main parts of the figure 11 - Film 12, 13 - Core 16 - Turret 20 - Electrostatic charge applying means 22 - Cutter 23, 26, 29 - Arm 30 - Holding member patent issued Applicant Mitsubishi Heavy Industries, Ltd. Figure 1

Claims (1)

[Claims] In a turret-type automatic cutting and winding machine that automatically cuts and winds a strip of film or the like using a presser roll, a presser member, and a cutter, it is equipped with a turret-type automatic cutter and winder that applies an electrostatic charge to the cut end of the strip of film or the like, and is attached to a swingable arm. It has a charge applying means, and a cutter and a pair of holding members are rotatably arranged to face the strip-shaped object, and the holding member is arranged to enter before and after the cutter that is waiting at a cutting position. 1. An automatic cutting and winding device for a strip-like material such as a film, characterized in that it is configured as follows.