JPH07149465A - Film winding method - Google Patents

Abstract

PURPOSE:To provide a film winding method which is modified to wind a film in an excellent wound shape. CONSTITUTION:In a film winding method wherein after the selvages at two ends of a film delivered from a film making process are cut by a selvage cutter 6, the film is wound in a roll shape by means of a winder 1, in synchronization of oscillation in the direction of the width of a film of the selvage cutter 6 with that of a winder 1, a wire for detecting oscillation of the selvage part cutter 6 is arranged along the direction of conveyance of the film and oscillations are synchronized with each other through a wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film winding method, and more specifically, to a roll-shaped film wound by a winder after cutting both end ears of the film fed from a film forming process by an ear cutter. In the film winding method, the film is wound in a good winding shape by synchronizing the oscillation (reciprocating motion) of the edge cutter and the winding machine in the film width direction with a specific means. The present invention relates to a film winding method improved so that the above can be performed.

[0002]

2. Description of the Related Art A film delivered from a film forming process is wound in a roll shape by a winder after cutting both ends of the film by an ear cutter. By the way, the film sent out from the film forming process has large or small thickness spots in the width direction. Therefore, when such a film is wound into multiple layers in a roll shape, a hard winding portion called a so-called band is generated due to the overlapping of the thick portions, and causes permanent strain in the film. On the other hand, the overlapping of thin parts causes wrinkles in the film.

Conventionally, in order to cope with the thickness variation in the width direction of the film as described above, a method of synchronizing the oscillation between the ear cutter and the winder to disperse the thickness variation laminated on the film to be wound. Is generally adopted.

FIG. 3 is a plan view showing an example of a conventional film winding method, and FIG. 4 is a side view showing the film winding method shown in FIG. 3, but the illustrated film winding method is EPC. (Edge Position Cont
This is a method of synchronizing the oscillation between the ear cutter and the winder by detecting the end of the product film by using the roll device.

That is, the full width film (13) delivered from the film forming process by the transfer roll (10) is not turned into a product by the edge cutter (6).
4) and (14) and the central product film (15), and the product film (15) is fed to the transport roll (1).
1) and (12) and is wound by the winding core (2) of the winder (1), and the selvage (14) has slit ears (1).
It is discharged as 7).

The above-mentioned ear cutter (6) is connected to a connecting shaft (7) supported by an ear cutter bearing (8), and the connecting shaft (7) is a motor (9) for ear cutter oscillation. And is configured to be oscillated in the width direction of the film. On the other hand, the winder (1) is supported by a winder wheel (3) and is configured to be oscillated in the width direction of the film by a winder oscillation cylinder (5).

Then, the film detection sensor (4) installed in the winder (1) causes the product film (15).
The end part of the winder is detected, and the EPC device (16) drives the winder oscillation cylinder (5) to synchronize the oscillation between the ear cutter (6) and the winder (1). To do.

[0008]

However, the film winding method as described above has the following drawbacks. That is, the film being conveyed may fluctuate due to turbulence of the surrounding air, etc. Therefore, the end of the product film (15) cannot be accurately detected by the film detection sensor (4). As a result, the end portion of the winding film is displaced, and the film cannot be wound in a good winding shape. The present invention has been made in view of such circumstances, and an object thereof is to provide an improved film winding method capable of winding a film in a good winding state.

[0009]

Means for Solving the Problems That is, the gist of the present invention is to wind a film that is wound in a roll shape by a winder after cutting both ends of the film fed from the film-forming process with an edge cutter. In the method, in synchronizing the oscillation in the width direction of the film between the ear cutter and the winder, the oscillation detection wire of the ear cutter is arranged along the transport direction of the film, and the above-mentioned wire is provided through the wire. It exists in a film winding method characterized by synchronizing oscillations.

[0010]

[Operation] The wire that is arranged along the film transport direction and detects the oscillation of the ear cutter is not affected by air turbulence during the film transport process, ensuring the oscillation between the ear cutter and the winder. Sync to.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing an example of the film winding method of the present invention, and FIG. 2 is a side view showing the film winding method shown in FIG.

A typical film to which the film winding method of the present invention is applied is a biaxially stretched polyester film. Biaxially stretched polyester film
First, a molten polyester resin is extruded from a die of an extruder and electrostatically adhered to a cooling rotary drum to form a sheet,
Then, it is obtained by biaxially stretching in the longitudinal and lateral directions in a film forming process consisting of a roll stretching machine and a stenter.

Then, the full width film (13) delivered from the film forming process by the transport roll (10) is not turned into a product by the edge cutter (6).
(14) and the central product film (15) are cut, and the product film (15) is conveyed by the transport rolls (11),
After passing through (12), it is wound around the winding core (2) of the winding machine (1), and the ears (14) are discharged as slit ears (17).

The ear cutter (6) is connected to a connecting shaft (7) supported by an ear cutter bearing (8), and the connecting shaft (7) is a motor for ear cutter oscillation (9). And is configured to be oscillated in the width direction of the film. On the other hand, the winder (1) is supported by a winder wheel (3) and is configured to be oscillated in the width direction of the film by a winder oscillation motor (26).

In the present invention, the oscillation detecting wire of the ear cutter is arranged along the transport direction of the film, and the oscillation of the ear cutter and the winder is synchronized via the wire. In the illustrated example, in order to realize the above-mentioned oscillation synchronization by the oscillation detection wire of the ear cutter with a simple configuration, the iron piece bearing (21) arranged near the winder (1), The iron piece (19) supported by (21) and configured to be movable in the width direction of the film and the iron piece detection sensor (25) installed in the winder (1) are used.

That is, the cutter connecting wire pulleys (20), (20) are provided in the vicinity of the ear cutter (6) and the winder (1), respectively, and their mutual pass lines are substantially parallel to the transport film. ) Are arranged, and further, the iron line bearings (21), (21) are arranged at a position where the path line with the pulley (20) arranged in the vicinity of the winder (1) is substantially perpendicular to the transport film. A wire pulley (24) for connecting weights is arranged at a crossing position, and a wire for connecting cutters (one end of which is connected to the ear cutter (6) is provided on the path line of the wire pulleys for connecting cutters (20) and (20) ( 18) is arranged, and one end of the cutter connecting wire pulley (20) and the weight connecting wire pulley (24) are connected to the cutter connecting wire pulley (20).
8) and a weight connecting wire (23) connected to the weight (22) at the other end is arranged, and the cutter connecting wire (18) and the weight connecting wire (23) are entirely weighted (22). Stretch by. Then, the iron piece (19) is fixedly installed in the middle of the weight connecting wire (23).

In the case of the above structure, the oscillation of the ear cutter (6) is performed by the cutter connecting wire (18) which constitutes the oscillation detecting wire of the ear cutter.
And iron piece (19) through the wire (23) for connecting weights
Be transmitted to. Then, the position of the iron piece (19) is detected by the iron piece detection sensor (25) installed in the winder (1), the winder oscillation motor (26) is driven according to the detected position, and the ear cutter ( 6) Synchronize the oscillation of the winder (1).

In the present invention, the synchronization of the oscillation between the ear cutter and the winder by means of the oscillation detecting wire of the ear cutter is not limited to the above-mentioned constitution, but may be changed by the arrangement of the pulleys described above. A variety of different configurations may be employed, and springs may be used instead of weights to tension the detection wires. Further, the drive source for the oscillation of the winding machine is not limited to the motor type, and for example, a cylinder can be adopted.

By the way, since the positions of the ear cutters and the winder in the film conveying direction are different, it is necessary to reach the winder until the product film whose both ends are cut by the ear cutter reaches the winder. There is a certain time delay. Therefore,
In order to completely align both ends of the winding film, it is necessary to delay the oscillation of the winder from that of the ear cutter by a time corresponding to the above-mentioned time delay. However, in general, the oscillation speed is very slow, so that the unevenness at both ends of the winding film due to the above-mentioned time delay is so small that it is not a problem.

[0020]

According to the present invention described above, there is provided an improved film winding method capable of winding a film in a good winding shape without being affected by turbulence of the surrounding air. Provided. Therefore, the industrial value of the present invention is remarkable.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing an example of a film winding method of the present invention.

FIG. 2 is a side view for explaining the film winding method shown in FIG.

FIG. 3 is an explanatory plan view showing an example of a conventional film winding method.

FIG. 4 is a side view for explaining the film winding method shown in FIG.

[Explanation of symbols]

 1: Winder 2: Winding core 3: Winder shaft wheel 4: Film detection sensor 5: Winder oscillation cylinder 6: Ear cutter 7: Connection shaft 8: Ear cutter bearing 9: Ear cutter Oscillation motor 10: Conveying roll 11: Conveying roll 12: Conveying roll 13: Full width film 14: Ear portion 15: Product portion film 16: EPC device 17: Slit ear 18: Cutter connecting wire 19: Iron piece 20: Cutter connecting Wire pulley 21: Iron piece bearing 22: Weight 23: Weight connection wire 24: Weight connection wire pulley 25: Iron piece detection sensor 26: Winder oscillation motor

Claims (1)

[Claims] 1. A film winding method of winding both ends of a film delivered from a film-forming step with an ear cutter and then winding the film into a roll by a winder. In synchronizing the oscillation in the film width direction, the oscillation detecting wire of the ear cutter is arranged along the transport direction of the film, and the above-mentioned oscillation is synchronized through the wire. How to take.