JPH0671959B2 - Automatic cutting and winding device for strips such as films - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is applied to, for example, a biaxially stretched film manufacturing apparatus, a non-stretched film manufacturing apparatus, etc., to automatically cut a strip of film or the like and continuously. The present invention relates to a device for automatically cutting and winding a belt-like material such as a film that can be rewound and used for winding paper, cloth, and the like.

(Prior Art) In winding a band-like material such as a film (hereinafter referred to as a film), a method of directly winding the tape around the core without using an adhesive tape or other adhesive force applied to the core (hereinafter referred to as tapeless winding The type) has no damage to the inner layer film of the mill roll due to the unevenness of the core surface due to the adhesive tape or the like, and the work of removing the remaining sticky substances at the time of reusing the core is not necessary, so it is attracting attention in various fields. However, since there are problems such as scratches on the cut end of the film, the development of a more perfect one has been strongly desired.

The outline of the conventional tapeless winder is shown in Figs.
Explaining with reference to FIG. 10, 1 is a film, 2 is a core, and the core 2 is mounted on a turret 4 by a driving device (not shown) so as to rotate in a direction indicated by an arrow A.
3 is a guide roll, which is rotatably supported by the end of an arm 4a which is provided 90 ° apart from the core 2 of the turret 4. Reference numeral 5 is also a guide roll, but this guide roll 5 is pivotally supported on the film 1 supply end of the frame 10, and traverses the intermediate portion between the guide roll 5 and the core 2 and turns in the direction B in the figure. A winding roll 6 is provided, and the roll 6 is pivotally supported on the tip of a swing arm 7.
The other end of the swing arm 7 is pivotally supported on the film winding side of the frame 10. And the winding roll 6
As described above, the guide roller 5 swivels across the intermediate portion between the guide roll 5 and the core 2 to reach the rear side of the core 2.

Reference numeral 8 is a cutter, the other end of which is attached to the tip of an arm 9 which is also pivotally mounted at a proper position on the frame 10. The arm 9 is rocked by a drive device (not shown) in synchronism with the rotation of the winding roll 6. The cutter 8 at the tip portion thereof cuts the film 1.

Now, in FIG. 5, the film 1 is wound around a core (not shown) attached to the other end of the turret 4, and when the mill roll wound by the core reaches a full amount, The winding roll 6 rotates in the direction of arrow B, and the film 1 holds the core 2 in the state shown in FIG.

Next, as shown in FIG. 10, the cutter 8 is lowered to cut the film 1, and the film end a is attached to the core 2 and the winding roll 6.
Then, push it into part b between the two to finish the winding.

However, in the case of the above-mentioned conventional case, since the cut film end a is wound at the time of rewinding to the new core,
As shown in FIG. 9, it was necessary to wrap the core 2 with the film 1 prior to cutting, but the film 1 was generated due to the winding between the winding roll 6 and the guide roll 3 in FIG. In order to reach the state of FIG. 9 from the state of FIG. 8 with a certain tension, an excessive force is applied to the film 1 in order to prevent breakage, meandering, wrinkling, 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,
Moreover, the surface speed of the core 2 is set to be slightly higher than the speed of the film in order to prevent the slack of the film immediately after winding, so that a slip occurs between the film 1 and the core 2 and scratches are generated on the film 1. There was a risk that Therefore, the portion rubbed by the core 2 cannot be handled as a product, and the loss portion increases as the film speed increases.

Now, as shown in FIG. 10, the film 1 is supported by the core 2 and the guide roll 3, the arm 9 descends, and the cutter 8 enters the film 1 and cuts as described above. In addition,
Normally, the cutter 8 uses a saw blade shape as shown in FIGS. 11 and 12.

In the conventional film winder shown in FIG. 8, in order to obtain a good cut surface of the film material, the sharpness of the cutter is good, and the operating speed of the cutter 8 becomes faster as the traveling speed of the film increases, At the time of cutting, it was necessary to take measures such as increasing the tension of the film so that the film is not easily escaped by the cutter, or a means for supporting the film was provided, but if these measures are not found , As shown in FIG. 13, a strip-shaped uncut portion is generated in the cutting portion 9,
When wound around a new core, the strip-shaped portions of the cutting portion 9 are folded or overlapped to generate irregularities, and the irregularities are wound around the upper layer to give the film 1 an irregular habit and rewind. The flatness of the film 1 is impaired, and many defective parts are generated. Length l of this defective cutting part
The longer the running speed of the film 1, the slower the cutter operating speed, and the lower the tension of the film, the longer the length of the defective film.

(Problems to be Solved by the Invention) The present invention is intended to solve problems such as the generation of scratches on the cut end of a film in a conventional winder for winding a strip of film or the like, and the unevenness of the cut portion. Is.

(Means for Solving the Problems) For this reason, the present invention provides a swingable arm in a turret type automatic cutting and winding machine that automatically cuts and winds a band-shaped material such as a film with a pressing roll, a pressing member and a cutter. It is equipped with a static charge imparting means for imparting an electrostatic charge to the upstream end of the cut end of a band-shaped object such as a film, and a continuous semi-lunar cutter that can be heated and a pair of pressing members are turned to face the band-shaped object. The pressing member is arranged so that it can be placed in front of and behind the cutter that is waiting in advance at the cutting position, and this is a means for solving the problem.

(Operation) When the film is rewound, the swinging arm swings, and the electrostatic charge imparting means mounted on the swinging arm imparts an electric charge to the upstream portion of the film cutting end so that the film cutting end is brought to the new core surface. Start winding at the same time as attaching. Next, at the time of cutting the film, the cutter and a pair of pressing members opposed to each other with the film interposed therebetween press down the film in the direction of the cutter while supporting the film by both, and increase the tension of the film to cut the film.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings. FIGS. 1 to 3 show an embodiment of the present invention, in which 11 is a film and 12 and 13 are cores. 13 is rotatably supported at both ends of a turret 16 mounted on a frame 19 so as to be rotatable in the C direction in the figure so as to be rotatable in the A direction by an unillustrated driving device. Arms 18 and 18 are projectingly provided on both sides of the center of the turret 16, and guide rolls 17 and 17 are pivotally supported at the respective tip ends of the arms 18 and 18. 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 supply side of the frame 19, the guide roll 27 is provided on the film feeding passage of the frame 28, and the frame 28 swings about the same axis D. Swing arms 23 and 26 are pivotally attached. A continuous half-moon-shaped cutter 22 and a heater 31 shown in FIGS. 5 and 6 are attached to the tip of the swing arm 23. Further, a pressing roll 25 and an electrostatic charge applying means 20 are attached to the swing arm 26. Further, an arm 29 that also swings around the point E is pivotally attached to the tip of the swing arm 26, and a pair of presser members 30 including a presser bar 30a and a presser bar 30b are attached to the end of the arm 29. is doing. Further, an air blowing nozzle 30c may be formed in the pressing member 30 so that the film end a is pressed against the core 13 by air as shown in FIG. Further, the electrostatic charge applying means 20 may be attached to the swing arm 23. The electrostatic charge imparting means 20 is of a known charging type by corona discharge and uses an electrode portion of an electrostatic charge imparting device. The power supply section and wiring of the same device are omitted in the figure.

Next, the operation of the tapeless winding of the film 11 using the apparatus according to the embodiment of the present invention as described above will be described. The state when the state is reached is shown. Then, the winding length counter (not shown) measures the winding length, and when the winding length reaches a full amount, the arm 23 is activated to stand by at the position shown in FIG.
With 25, the film 11 is pressed against the new core 13, and at the same time, the swinging arm 29 is lowered so that the pair of pressing members 30 are
A cutter that heats the film 11 with a heater 31 for heating the cutter.
The film 11 is pushed in the direction of 22 to increase the tension of the film 11 and cut at a stretch.

Simultaneously with this cutting, an electric charge is applied to the film cutting end a or the core surface from the electrostatic charge imparting means 20, and the film is adsorbed to the core 13 to be wound up, and automatic cutting and rewinding are performed without a tape. When air is blown from the air blowing nozzle 30c in FIG. 4, it is carried out at the same time as the charge is given from the electrostatic charge giving means 20.

By adopting such a configuration, as shown in FIG. 2, since the film end a is minimized, the stopping position of the cutter 22 can be brought as close to the core 13 as possible. In addition, the arm 29 is short and has a small weight ahead of the arm 26.
By pivoting, the high-speed cutting becomes possible with a small swinging motion. Then, when winding is completed, arms 23 and 29
Start, and return to the state of Fig. 3, and on the new core 13,
The mill roll 15 and the film 11 are wound up.

Further, in the above embodiments, the pressing roll 25 can be used as a reion roll for controlling the winding hardness of the mill roll. Furthermore, as means for imparting electrostatic charge,
Blower type electrostatic charge imparting means may be adopted. Further, the distance between the presser bar 30a and the presser bar 30b may be made changeable so that the type and thickness of the film can be changed, and the air blowing nozzle can be provided separately from the presser member 30.

(Effects of the Invention) As described in detail above, according to the present invention, the film can be attracted to the core to be wound by applying an electric charge to the surface of the film or the core at the same time as cutting the film. It is not necessary to embrace the core with the film before cutting, and there is no film that comes into contact with the core at the end of the mill roll winding to cause scratches and become a loss, and the yield of the film is greatly improved.

The present invention also provides a continuous half-moon-shaped cutter that can be heated and a pair of pressing members that are rotatably arranged so as to face the strip, and the pair of pressing members enter the front and the rear of the cutter during cutting. Since the film is pressed, the tension of the film increases, and the film is pressed without escaping from the cutter. Therefore, the cut end of the film can be formed into a good cut shape, and the yield of the film can be improved. The combination of this cutting means and the means for imparting an electrostatic charge to the upstream end of the cutting end enables stable tapeless winding.

Furthermore, by making the cutter blade continuous half-moon shape, the cutting shape of the film becomes better, the cutting length l ₁ becomes negligibly short, and the defective part of the film when rewinding the wound film is used. There is an effect that it can be remarkably reduced.

[Brief description of drawings]

FIGS. 1, 2 and 3 are side views of an automatic cutting and winding device for a belt-shaped film or the like showing an embodiment of the present invention having different operating states, and FIG. 4 is another embodiment of the present invention. 5 is a front view of a cutter showing an embodiment of the present invention, FIG. 6 is a side view of the same, and FIG. 7 is a plan view showing the cut shape of the film by the cutter of FIG. Fig. 8 is a side view of a main part showing a film winding state by a conventional device, Fig. 9 is a rewinding preparation state diagram of the same as above, 10 is a cutting state diagram of the same as above, and Fig. 11 is a front view of a conventional cutter. FIG. 12 is a side view of the same, and FIG. 13 is a plan view showing the shape of the film cut end by the cutter of FIG. Description of main parts of the figure 11 …… Film 12,13 …… Core 16 …… Turret 20 …… Static charge imparting means 22 …… Cutter 23,26,29 …… Arm 30 …… Pressing member 31 …… Heater

Claims (1)

[Claims] 1. A turret type automatic cutting and winding machine for automatically cutting and winding a band-shaped material such as a film by a pressing roll, a pressing member and a cutter, which is mounted on a swingable arm and is upstream of a cut end of the band-shaped material such as a film. A continuous half-moon-shaped cutter that has a static charge imparting means for imparting a static charge to a portion and can be heated;
A pair of pressing members are rotatably arranged so as to face the belt-like object, and the pressing members are configured to enter before and after the cutter that is waiting in advance at the cutting position. Automatic cutting and winding device for strips such as films.