JPH0613384B2 - 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 relates to an automatic film winder in general, and automatic cutting and winding of a band such as a film that can be used in a biaxially stretched film manufacturing apparatus, a non-stretched film manufacturing apparatus, etc. It relates to the device.

(Prior Art) A conventional automatic web cutting and rewinding device (Japanese Patent Laid-Open No. 58-125554) will be described with reference to FIGS. 6 to 15.
FIG. 6 is a side view of the roll changer 010 positioned along the turret type winder for performing roll change,
FIG. 7 is an enlarged view of the main part of the winder of FIG. 6 showing the cutter 026 positioned near the new core 018 and the web W before cutting, and FIG. 8 shows the adhesive strip 056. FIG. 10 is a perspective view showing a new core positioned near the cutter 026, the web W and the pressure roll before the attached web W is transferred to the new core 018.

FIG. 9 is a side view of the cutter 026 in the position before cutting,
10 is a side view showing the position of the adhesive strip 056 and the cutter 026 attached to the new core 018 in the position before cutting, and FIG. 11 shows the new core 018 rotated in the position before cutting. FIG. 12 is a side view showing the position of the cutter 026, and FIG. 12 shows the web W and the cutter 026 bonded to a new core 018 at the cutting position.
FIG. 13 is a side view showing the position of the adhesive tape 056 attached to the new core 018 and the cutter 026.
FIG. 14 is a side view showing the web W rotated so as to come into contact with the web W, FIG. 14 is a side view showing the cut web W attached to the new core 018 and continuously rotating around the web W, FIG. FIG. 14 is an enlarged view of a main part of FIG. 13 showing a state where the blade contacts the blade of the cutter 026 when being rotated.

The cutting and rewinding of the web W is performed in the state shown in FIG.
At the time of cutting, as shown in FIG. 7, the cutter 026 is advanced by the arm 028 and stands by at the position shown in FIG. 9 (FIGS. 9 to 11). Next, as shown in FIG. 12, the web pressing member 020 presses the web W against the new core 018, and the web W is adhered to the core 018 by the adhesive strip 056 applied to the core 018. The bonded web W is then
As shown in the figure, the web W is cut by the cutter 026 when it reaches the cutter 026 and the core 018 rotates.
The winding by is started.

In the conventional apparatus described above, the cutting is performed according to the relationship shown in FIG. 13, that is, FIG.
No. 18 is required to have sufficient adhesive strength to withstand the cutting resistance with the adhesive strip 056.
In the winder disclosed in Japanese Patent No. 25554, a special adhesive was applied with a thickness of about 1 mm, but it had the following drawbacks.

That is, when a considerable length of the inner layer of the rolled up mill roll was rewound due to the influence of the adhesive strip 056, unevenness 057 was generated as shown in FIG. 16 and the product was not obtained. Further, it is difficult to completely peel off the adhesive strip 056, and when the core 018 is repeatedly used, the adhesive remains on the surface of the core 018, causing serious irregularities, which increases the aforementioned defects. Further, the cut end is folded back, and the certainty of cutting is low due to the relation between the adhesive force and the sharpness of the cutter, and it is difficult to handle for core reuse, and there are many losses of the web W at the winding start part. there were.

(Problems to be Solved by the Invention) In the present invention, an adhesive remains on the surface of a conventional core, which causes serious irregularities, has a low certainty of cutting, and is difficult to handle for core reuse. The problem is that there is a lot of web loss at the beginning of winding.

(Means for Solving the Problems) Therefore, the present invention is a turret type automatic cutting and winding device that automatically cuts and winds a band-shaped material such as a film with a pressing roll and a cutter, and forms the pressing roller and the cutter into a band-shaped material. The cutters are arranged so as to be opposed to each other and rotatable, and the cutter protrudes from the vicinity of the outer peripheral surface of the new core between the new core in which the strip is not yet wound and the old core in which the strip is wound. The press roll is rotated toward the position to be ready for standby, and the pressing roll is rotated toward the new core to press the same strip against the cutter and at the same time contact the same strip with the new core to cut and rewind. This is a means for solving the problem.

(Operation) In the present invention, the belt-shaped material is pressed against the cutter, which is projected from the vicinity of the outer peripheral surface of the newly rotated core and stands by, by the pressing roll to cut the same, and at the same time, the belt-shaped material is transferred to the new core by the pressing roller. Since the tape is rewound by contacting it, scratches on the film surface are prevented to reduce the loss of strips, and the adhesive force can be kept to the minimum necessary for winding the film. Thus, it is possible to wind the film to reduce the unevenness of the core, and to easily remove the adhesive medium such as the adhesive tape to reduce the unevenness of the reused core. Further, the folding of the cut end of the film is prevented, and the action of the pressing roll increases the cutting speed to reliably cut the film.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. Figs. 1 to 5 show an embodiment of the present invention, in which 1 is a film and is wound around cores 4 and 5 as mill rolls 2 and 3. . Cores 4 and 5 are provided with double-sided tape or the like to provide adhesiveness (not shown),
It is rotatably mounted on the turret 7, and is rotated in the direction of arrow A by a driving device (not shown) to stop at the winding position (position shown).

The roll 10 is mounted on the frame 18, and the roll 13
The roll (or presser bar) 14 is mounted on an arm 15, which is rotatably mounted on a frame 18 and is swung by an air cylinder or the like (not shown). The cutter 16 is attached to the arm 17, the arm 17 is rotatably attached to the frame 18, and is swung by an air cylinder or the like (not shown). The roll 13 is rotatably supported.

Next, the operation of the embodiment constructed as described above will be described. FIG. 1 shows a steady winding state. Now, when the predetermined winding length is reached, the turret 7 rotates in the direction of arrow A to the state shown in FIG. 2, the arm 17 then rises, and the cutter 16 reaches the operating position as shown in FIG. New core 5
Starts rotating at a predetermined tuning speed. Winding wire E at this time
In order to minimize the film edge a preceding (Fig. 4), the cutter stop position is controlled so as to be accurately near the winding line E.

Next, the arm 15 is lowered as shown in FIG.
The film 1 is pressed against the cutter 16 at high speed by 3, 14 and cut, and the film 1 is stuck on the core 5 by the roll 13 and rewound. When the rewinding is completed, the arms 15 and 17 are returned to the positions shown in FIG. 5, and a new mill roll 3 is wound on the core 5.

The roll 13 can also serve as a reion roll for controlling the winding hardness of the mill roll during steady winding (state indicated by a chain double-dashed line in FIG. 1). Further, as shown in FIG. 4, the roll 13 is brought into contact with the core 5, and at the same time, the film 1 is cut by the cutter 16.

(Effects of the Invention) As described in detail above, according to the present invention, a belt-like material is pressed by a pressing roll to a cutter that projects from the vicinity of the outer peripheral surface of a newly rotated core and stands by, and at the same time,
Since the belt-shaped material is rewound by contacting the new core with the pressing roll, scratches on the film surface can be prevented and loss of the belt-shaped material can be reduced, and the adhesive force of the film on the core can be wound. The adhesive tape of about 10 μm or less can be used, the cleaning is easy when the core is reused, the irregularities on the surface of the core are small, and the inner film of the mill roll is less damaged.

Further, since the film is cut not by the adhesive force of the core but by pressing it with a roll, the cutting is surely performed in the vicinity of the winding wire E, the film cutting edge preceding the winding wire E is short, and it is not folded back. Since it does not occur, there are advantages such as no trouble during winding, little damage to the mill roll inner layer film, and easy cleaning of the core.

[Brief description of drawings]

1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5 are side views showing the operation states of the automatic cutting and winding device for strips of film and the like showing an embodiment of the present invention, respectively. FIG. 7 is a side view of a conventional web cutting and rewinding device, FIG. 7 is an enlarged view of the essential parts, FIG. 8 is a perspective view of the same, FIG. 9, FIG. 10, FIG. 11, FIG.
13 and 14 are side views showing the operation sequence of the apparatus in FIG. 7, respectively, FIG. 15 is an enlarged view of the main part of FIG. 13, and FIG. 16 shows the unevenness of the web in the conventional case. It is a perspective view. Description of main parts of the figure 1 ... Film, 2, 3 ... Mill roll 4, 5 ... Core, 7 ... Turret 13, 14 ... Press roll, 15 ... Arm 16 ... Cutter

Claims (1)

[Claims] 1. A turret type automatic cutting and winding device for automatically cutting and winding a belt-shaped material such as a film by a pressing roll and a cutter, wherein the pressing roller and the cutter are arranged so as to face each other so as to be rotatable. Along with the new core in which the belt is not yet wound and the old core in which the belt is wound, the cutter is rotated to a position protruding from the vicinity of the outer peripheral surface of the new core so that it can stand by, The press roll rotates toward the new core, presses the same strip against the cutter, and at the same time makes the new core contact the same and cuts and rewinds it. .