JPS62285856A - Automatic cutting winding device of web such as film - Google Patents

Abstract

PURPOSE:To reduce a defective web, by providing an electrostatic charge application means with an arm capable of swinging, pivotally disposing a cutter and a pair of pressing members in confrontation with a web and causing a swing acceleration mechanism to insert the pressing members to the front and the back of a cutter at a high speed for cutting the web. CONSTITUTION:When a core 12 is filled with a web (film) 11, an arm 23 is turned to a cutting position and a swing arm 26 is started so that the film 11 is pressed to a new core 13 by a pressing roll 25. At the same time, an air cylinder 32a is actuated to cause an arm 29 to be pressed upwardly and it is turned while it increases flexure of a spring 33. When the arm 29 passes through a dead point, it is turned quickly in acceleration to a cutting position and pressing members 30a, 30b at the tip of the arm 29 presse the film 11 downwardly toward a cutter 22 at a high speed for cutting the film 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 surface of the new core 13, whereby the film 11 is adsorbed for winding.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to a belt-shaped article such as a film applied to, for example, a biaxially stretched film 1, a manufacturing device, an unstretched film manufacturing device, etc. It automatically cuts and rewinds continuously, and can also be used to wind paper, cloth, etc. Automatically cuts strips of film and other materials!
This relates to the fr winding device.

(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). ) is attracting attention in many fields because it does not damage 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 something more perfect.

The outline of the conventional tapeless winding machine will be explained below with reference to Figs. 5 to 7. 1 indicates the film, 2 indicates the core, and the core 2 is rotated in the eight directions indicated by the arrows by a drive device (not shown) on the 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 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 denotes a forceps, 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 cutter 8 cuts the film 1.

Now, in FIG. 5, the film l 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 core 2 is caught in the fill tube 1, 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, 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 in FIG. 6 from the state 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 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. When cutting, the cutter is pushed by the cutter and the cutter escapes.It is necessary to take measures such as increasing the tension of the film or providing a means to support the film, 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 the unevenness wraps around the upper layer, giving the film an uneven texture and then being rewound. The flatness of the film 1 will be impaired and many defective parts will occur. The length l of this defective cut is
The faster the running speed of the film 1 is, the slower the cutter operating speed is, the longer the film tension becomes unsatisfactory, which has the drawback of making the defective film with irregularities 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. The method includes an electrostatic charge applying means that is attached to the cut end of a strip such as a film or the surface of the core, and a cutter and a pair of holding members equipped with a swing acceleration mechanism are opposed to the strip. The holding member is arranged to be rotatable and is constructed so that the holding member enters at high speed in front and behind the cutter that is waiting in advance at the cutting position, and this is used as a means to solve the problem. .

(Operation) 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, and transfers the cut end of the film to a new core. Winding begins as soon as the film is adhered to the surface.Next, when cutting the film, a pair of holding members facing each other with the cutter and the film in between support the film and press it down at high speed in the force direction. to increase the tension of the film and cut 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
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 film 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 cutter 2 is installed at the tip of the swinging arm 23.
I am wearing 2. Further, the swinging arm 26 is equipped with a presser roll 25, a pressing cylinder 32 consisting of two sets of air cylinders 32a and 32b, 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 30 consisting of a presser bar 30a and a presser bar 30b are attached to the tip of the arm 29. I am wearing it. Arm 29 is arm 26
The arm 26 is connected to the spring 33, and the arm 26 is connected to the spring 33.
An impact force support member (not shown) is provided to support the arm 29 in the state shown in FIG. 1 or 2, and the pressing cylinder 32 and spring 33 constitute a swing acceleration mechanism. 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. It is also possible to attach a heater 31 to the lower surface of the cutter 22 to heat the film above its melting point to ensure cutting. Furthermore, an electrostatic charge applying means 20 may be attached to the 1z movable arm 23. Further, 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 cutter 22
2, the swing arm 26 is activated, and the presser roll 25 presses the film 11 onto the new core 13. At the same time, the air cylinder 32a is activated by a signal from a control device (not shown). The rod is activated, the rod is pushed out, the arm 29 is pushed up, and the arm 29 is rotated clockwise around point E until it passes the dead center of the spring 33.
The spring 33 rotates while increasing its deflection. When the arm 29 passes the dead center of the spring, the air cylinder 3
Adding the recovery force of the spring 33 to the ejection speed of 2a,
It rotates while being rapidly accelerated to the cutting position shown in FIG.

That is, the pair of press members 30 attached to the ends of the arms 29 press down the film 11 at high speed in the direction of the cutter 22, increasing the tension of the film 11 and cutting it all at once.

Simultaneously with this cutting, an electric charge is applied from the electrostatic charge applying means 20 to the cut end a of the film or the surface of the core, and the film is adsorbed to the core 13 and wound, thereby performing automatic cutting and rewinding without tape. In addition, the air blowing nozzle 3 in FIG.
The air blowing from 0c may be performed simultaneously with the charge application from the electrostatic charge application 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. Further, an arm 29 having a short arm length and a small weight is pivotally attached to the front end of the arm 26, and a cylinder 32 and a spring 33 are used in combination, thereby enabling high-speed cutting with a small swinging motion. Next, when the winding is completed, the arm 23 is activated to return to the state shown in FIG. 3, the air cylinder 32b is activated, and the arm 29 is rotated counterclockwise to return to the state shown in FIG. At the top, the mill roll 15 and the film 11 are wound up.

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. 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 or core surface at the same time as cutting the film, the film can be adsorbed to the core and wound, so tapeless winding can be performed. There is no need to enclose the core with the film before cutting during 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 disposed facing each other with the film in between, and a device is provided to increase the swinging speed of the holding member. The pair of holding members increases the tension of the film during cutting, and the pair of holding members also presses the film to prevent it from escaping from the cutter, enabling high-speed cutting and creating a good cut shape for the cut edge of the film. I can do it. Furthermore, a heater attached to the cutter can heat the cutter to a temperature higher than the melting point of the film to ensure cutting. This has the effect of significantly reducing the number of defective parts of the film when the film is rewound onto a mill roll for use. The above effect becomes more pronounced as the winding speed of the cut 11'i 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 the main parts showing the state of film winding by the conventional device, FIG. 6 is a diagram of the above rewinding preparation state, FIG. 7 is a diagram of the same as the above cutting state, and FIG. 8 is a front view of the conventional cutter. 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 cutter of FIG. 8. Explanation of main parts of the figure 11--Film 12.13-Core 16-Turret 20-Electrostatic charge applying means 22-Casota 23, 26, 29--Arm 30-Press member 31--Heater 32--Press Cylinder 33...Spring patent Applicant: Mitsubishi Heavy Industries, Ltd. Figure 1 Figure 4

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 attached to a swingable arm, and a static cutter is attached to the cut end of the strip of film or the core surface. A cutter and a pair of holding members each having an oscillating acceleration mechanism are rotatably arranged opposite to the strip-shaped material, and the cutter is rotatably arranged to face the strip-shaped material. 1. An automatic cutting and winding device for a strip-like material such as a film, characterized in that the holding member is configured to move in front and behind a cutter at high speed.