JPS62285857A - Automatic cutting and winding device of web such as film - Google Patents

Abstract

PURPOSE:To improve the cut edge of a film, by providing an electrostatic charge application means with an arm capable of swinging, pivotally disposing a cutter and a pair of support members in confrontation with a web and inserting a cuter into an intermediate portion between the support members for cutting. CONSTITUTION:When a core 12 is filled with a film 11, an arm 23 is started and turned for waiting at a cutting position. Then, a swing arm 26 is started to cause a pressing roll 25 to press the film 11 on a new core 13. At the same time, an arm 29 is lowered to press the film 11 to a support members 30a 30b by a cutter mounted at its extreme end to increase tension of the film so that the film is cut in a moment. At the same time, an electrostatic charge application means 20 applies electric charge to the cut edge a of the film or the new core 13 to adsorb the film 11 to the core 13. Further, the film is adsorbed securely by jetting air from an air nozzle 31. As a result, a cut edge is made good and the yield of the film is improved.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Industrial Field of Application) The present invention is a method for automatically manufacturing a strip of film, etc. applied to, for example, a biaxially stretched film manufacturing device, a non-stretched film manufacturing device, etc. The present invention relates to an automatic cutting and winding device for cutting and rewinding strips of film and the like, which can be used for winding 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). ) has attracted attention in many fields because it does not have any scratches on the inner layer film of the mill roll caused by unevenness on the core surface caused by adhesive tape, etc., and there is no need to remove residual adhesive when reusing the core. However, due to problems such as abrasions occurring at the cut edges of the film, there was a strong desire to develop a more perfect version.

The outline of a conventional tapeless winding machine will be explained below with reference to Figs. 5 to 7. 1 indicates a film, 2 indicates a core, and the core 2 is rotated in the direction of arrow A in the figure by a drive device (not shown) on a turret 4. It is equipped to do so.

3 is a guide roll, which connects the core 2 and 90 of the turret 4.
It is rotatably supported by an end of an arm 4a provided at a distance of .degree. 5 is also a guide roll, but this guide roll 5 is pivotally supported by the film 1 supplying end of the frame 10, and also crosses the intermediate part between the guide roll 5 and the core 2 and turns in the direction B in the figure. A take-up roll 6 is provided, and the roll 6 is pivotally supported at the tip of a swinging arm 7, and the other end of the swinging arm 7 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 around a core (not shown) attached to the other end of the turret 4.
When the mill roll wound on the same core reaches full capacity,
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 canter 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, it was necessary to wrap the core 2 with the film 1 before cutting, as shown in FIG. , the film 1 has a constant tension generated between the winding roll 6 and the guide roll 3 in FIG. 5 due to winding, and in order to reach the state shown in FIG. Apply excessive force to film 1,
In order to prevent breakage, meandering, wrinkles, etc., 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 rubbed by the core 2 cannot be treated as a product, and this 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 have good sharpness, and the faster the film travels, the faster the operating speed of the cutter 8. During 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 film to escape from being pushed by the cutter, but if these measures are not met, As shown in FIG. 10, when the cut portion 9 is left uncut and wound around a new core, each strip portion of the cut portion 9 is bent or overlapped, creating unevenness. When the unevenness wraps around the upper layer, the film 1 becomes uneven, and the flatness of the rewound film 1 is lost, resulting in the generation of many defective parts. The length β of this defective cut portion becomes longer as the traveling speed of the film 1 is faster, the cutter operation speed is slower, and the tension of the film is lower, which has the disadvantage of making the defective film with unevenness longer. Ta.

(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 Problem) Therefore, the present invention provides a turret-type automatic cutting and winding machine that automatically cuts and winds a strip-shaped object such as a film using a presser roll, a supporting member, and a canter. It has an electrostatic charge applying means attached to it and applies an electrostatic charge to the cut end or core surface of a strip-shaped object such as a film, and a cutter and a pair of supporting members are rotatably disposed opposite to the strip-shaped object, and The cutter is constructed so as to enter into the middle of the pair of support members that are waiting in advance at the cutting position, 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 or the surface of the core. Start winding at the same time as adhering to the surface. Next, when cutting the film, a cutter facing the pair of support members with the film in between enters the middle of the pair of support members to increase the tension of the film and cut the film.

(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
The turret 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 of the turret 16 so as to be rotatable in the direction of the arrow A by a drive device (not shown). Furthermore, arms 18.18 are protruded from both sides of the center of the turret 16, and guide rolls 1 are attached to each tip of the arms 18.18.
7.17 are each pivoted. 14 is a mill roll in which the film 11 is wound around the core 12.

Further, another frame 28 is installed on the film 11 supplying side of the frame 19, and the frame 28 has a guide roll 27 on the film feeding path, and furthermore, the frame 28 has a guide roll 27 on the film feeding path.
Swing arm 23.26 that swings around the same axis as 8.
is pivoted. A pair of support members 30 consisting of a support bar 30a and a support rod 30b are attached to the tip of the swing arm 23. Also, the swinging arm 26 has a presser roll 25.
and an electrostatic charge applying means 20. This electrostatic charge applying means 20 may be attached to the swing arm 26.

Further, an arm 29 which also swings about point E is pivotally attached to the tip of the swinging arm 26, and a cutter 22 is attached to the tip of the arm 29. Alternatively, an air blowing nozzle 31 may be attached to the tip of the swinging arm 29 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 and the support member 3
0 at the position shown in FIG. 11 is a pair of supporting members 30a.

30b to increase the film tension and cut it all at once.

At the same time as cutting, an electric charge is applied to the cut end a of the film or the core surface from the electrostatic charge applying means 20, and the film is adsorbed onto the core 13 and wound, thereby performing automatic cutting and rewinding without tape. Note that the air blowing from the air blowing nozzle 31 in FIG. 4 is carried out simultaneously with the charge application from the electrostatic charge application means 20.

By employing such a configuration, as shown in FIG. 2, the pair of supporting members 30 can be brought as close to the core 13 as possible in order to minimize the film edge a.

Furthermore, by pivotally attaching the arm 29 with a short arm length to the front end of the arm 26, high-speed cutting is possible with less swinging motion.

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 blower type electrostatic charge applying means may be employed.

According to the present invention, as described in detail above, the film is adsorbed to the core by applying an electric charge to the surface of the film or the core at the same time as cutting the film. Since the winding can be carried out using a tapeless method, there is no need to wrap the core with a film before cutting, and there is no need to remove the film from being lost due to contact with the core at the end of the mill roll winding. Film yield is greatly improved.

In addition, since the pair of support members and the cutter that presses against the film and cuts it are placed facing each other with the film in between, the pair of support members increases the tension of the film during cutting. Since the holding member 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. This has the effect of significantly reducing the number of defective parts of the film when the film is rewound onto a mill roll and used. The above effects become more pronounced as the cutting and winding speed increases.

[Brief explanation of the drawing]

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 is a side view of another embodiment of the present invention. FIG. 5 is a side view of the main part showing an example of the film winding state by the conventional device; FIG. 6 is the same as the above rewinding preparation state; FIG. 7 is the same as the above cut state; 9 is a front view of a conventional canter, FIG. 9 is a sectional view of the same side, 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--Talent 20--Electrostatic charge applying means 22--Force 23.26.29--Arm 30--Supporting member Patent issued Applicant: Mitsubishi Heavy Industries, Ltd. Figure 1

Claims (1)

[Claims] 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 support member, and a cutter is attached to a swingable arm and eliminates static charges on the cut end or core surface of the strip of film or the like. The cutter and a pair of support members are rotatably arranged facing the strip, and the cutter and a pair of support members are rotatably arranged to face the strip, and the cutter and a pair of support members are rotatably arranged in the middle of the pair of support members waiting in advance at the cutting position. An automatic cutting and winding device for a strip-like material such as a film, characterized in that the cutter is configured to penetrate into the device.