JP3495148B2 - Winding method of film-like molded product - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for winding a film-shaped molded product such as a synthetic resin film, cloth or nonwoven fabric.

[0002]

2. Description of the Related Art A film-shaped molded product such as a synthetic resin film, a cloth or a non-woven fabric is finally wound up on a winding drum after film formation, and is stored and transferred as a wound roll product.

The film-shaped molded product may meander when being wound on a winding drum depending on the conditions of various steps during film formation, and the winding shape of the wound roll product may be disturbed. In such a case, the meandering compensation function of observing the meandering state of the film-shaped molded product upstream of the winding drum and causing the winding drum to follow the meandering of the film-shaped molded product to align the ends of the winding rolls Is being used. In this case, conventionally, the meandering detector is fixedly installed on the winding device main body so as to interlock with the winding device main body, and does not itself move.

On the other hand, in order to improve the winding appearance of the winding roll due to the non-uniformity of physical properties such as thickness unevenness in the width direction of the film-shaped molded product, or to form the film-shaped molded product when the winding roll is unwound. In order to prevent slack, wrinkles, etc. of the winding drum,
Non-uniformity of physical properties such as thickness unevenness in the width direction by using the oscillation function that artificially meanders the film-shaped product by periodically swinging or moving in the width direction of the film-shaped product. There is a method in which the varnish is not accumulated on the fixed portion on the winding roll but is dispersed.

Conventionally, the above-mentioned two functions are individually selected and used according to the winding condition of the film-shaped molded article.
It is general that both ends of the film-shaped molded product are cut off and both end surfaces of the winding roll are cut and aligned by an edge cutting device installed on the body of the winding device.

However, in the prior art, when the width of the film-shaped molded product meanders is large, there is a problem that the ears are cut off by the edge-cutting device, so there is a margin to prevent the ears from being cut off when the meandering occurs. It is necessary to make the ear width expected
There is a problem that a large loss is caused by widening the ear width, which causes a cost increase.

[0007]

DISCLOSURE OF THE INVENTION According to the present invention, when a film-shaped molded product is wound up, even if the film-shaped molded product is meandered and uneven in thickness at the same time, the winding shape is good and the film after being unwound is rewound. wrinkle,
It is an object of the present invention to provide a method for winding a film-shaped molded product that does not cause sagging and minimizes ear loss.

[0008]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the present invention can be carried out by simultaneously operating the above-mentioned meandering compensation function and oscillation function when winding a film-shaped molded article. The present invention has been completed by finding that the object of can be achieved.

That is, the present invention relates to a method of winding a film-shaped molded product by a winding drum, in which a meandering detector for the film-shaped molded product is installed to meander the meandering shape of the film-shaped molded product. Compensation function and oscillation function are operated at the same time. When the film-shaped molded article has no meandering, the meandering detector vibrates in the width direction according to the width and linear velocity set by the oscillation setting device. Then, the deviation from the film-shaped molded product caused by this is detected by the meandering detector, the main body moving device is actuated, and the oscillation function of swinging by the amount of swinging of the meandering detector is activated. When the meandering occurs in the film-shaped molded product, the meandering detector detects a deviation from the film-shaped molded product. Therefore, the widthwise movement of the winding device body is caused only by the oscillation function. Add the meandering correction part to the movement, Then, the meandering detector follows so that the film-shaped molded product and the meandering detector do not shift relative to each other, and the meandering compensation function for operating the winding device main body by the main body moving device is activated. The method of winding a membranous molded article, which comprises winding the membranous molded article, is more preferable. More preferably, in the above method, the meandering detector is arranged in a width direction of the membranous molded article at a constant cycle or a non-periodical direction. The gist is a method for winding a membranous molded article, which comprises rolling the membranous molded article by rocking in a cycle.

According to the present invention, the meandering detector, which is conventionally fixedly installed on the winding device main body, oscillates on the winding device main body in a constant cycle or aperiodically. That is, by operating the meandering compensation function for a film-shaped molded product having meandering, the winding roll moves following the meandering, and as a result, the winding roll winds up as if there were no meandering, and in this state the winding device body It is possible to obtain a good film-shaped molded product by swinging the meandering detector itself installed on the winding device itself on the winding device body in a constant cycle or aperiodically and adding an oscillation function.

The oscillation width and linear velocity of the meandering detector are within a range in which the ear of the film-shaped molded product is not cut and wrinkles are not generated, and are suitable depending on the physical properties of the film-shaped molded product and the shape such as thickness and width. It can be adjusted to.

Examples of the film-shaped molded product used in the method of the present invention include synthetic resin films, sheets, porous films, webs and nonwoven fabrics.

[0013]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view of a specific example of a film-shaped molded product winding apparatus suitable for carrying out the method of the present invention. In FIG. 1, the winding device body 1 is provided with a winding drum 2 via a rotary shaft 9, and a film-shaped molded product 3 is provided.
Is configured to be wound by the winding drum 2 through the rollers 4 and 5.

The film-shaped molded product 3 is trimmed at both ends by the ear cutters 14 and 15 so that both ends are aligned, and the ends are aligned with the ear reels 18 fixed to the ear winding shaft 20.
It is rolled up to 19. The ear winding shaft 20 is rotated by an ear winding motor 21 fixed to the main body 1. On one outer line of the film-shaped molded product 3 upstream of the winding drum 2,
A meandering detector 6 for detecting the meandering state of the film-shaped molded product 3 is installed. The winding drum moving device 7 includes a meandering detector 6
The signal operates to follow the meandering of the film-shaped molded product 3. The movement of the winding device body 1 is performed by the carriage 11 attached to the bottom of the winding device body 1 moving on the rail 10. Further, the meandering detector 6 swings at the width and linear velocity set by the oscillation setting device 13 held at the tip of the detector moving device 8. This swinging is performed in a constant cycle or aperiodic.

FIG. 2 is an explanatory view when only the conventional meandering compensation function is used, and the detector moving device 8 and the oscillation setting device 13 in FIG. 1 according to the present invention are not provided conventionally. In FIG. 2, reference numeral 12 (solid line) indicates a state in which the film-shaped molded product 3 meanders, and reference numeral 22 (one-dot chain line) indicates a meandering assumption line. By a signal from a meandering detector (not shown) fixedly installed on the winding device body 1,
As the main body 1 moves in the direction in which the meandering is canceled, the winding drum 2 follows and winds up in a state as indicated by reference numeral 22. This prevents the ear from being cut off during meandering. However, uneven thickness, slack when rewound,
It was insufficient to prevent wrinkles.

FIG. 3 is an explanatory diagram when only the conventional oscillation function is used. Also in this case, as in the case of FIG.
Conventionally, the detector moving device 8 and the oscillation setting device 13 in FIG. 1 according to the present invention are not provided, and the oscillation is performed by the winding drum moving device 7. When the film-shaped product 3 does not meander, the main body 1 is oscillated at the set width and linear velocity, and the film-shaped product 3 is wound according to the track 23. At this time, the widths of the ears 16 and 17 are changed by the oscillation width and wound. As a result, the thickness unevenness is dispersed and it is effective for improving the winding appearance. However, when the film-shaped molded product 3 meanders, if the meandering width exceeds the selvage width, the selvage discontinuity occurs, which is not preferable. It was

According to the present invention, the meandering compensation function and the oscillation function are simultaneously operated to wind up the film-shaped molded product 3, an example of which will be described with reference to FIG.

In FIG. 4, when there is no meandering in the film-shaped molded product 3, first, the meandering detector 6 is moved in the width direction by the moving device 8 in accordance with the oscillation width set by the setting device 13 and the set value of the linear velocity thereof. Rock to. The meandering detector 6 detects the deviation from the film-shaped molded product 3 caused by this,
The main body moving device 7 is actuated, and the meandering detector 6 swings by an amount corresponding to the swing. In this case, since there is no meandering, the meandering detector 6
Does not move, and only the winding device body 1 moves. That is, the oscillation function works.

Next, when a meandering occurs in the film-shaped molded product 3, the meandering detector 6 detects a deviation from the film-shaped molded product 3 due to the meandering. The meandering correction is added to the operation of only the oscillation, and is amplified or attenuated. Then, the meandering detector 6 follows so that the film-shaped molded product 3 and the meandering detector 6 do not shift relative to each other, and the winding device main body 1 is operated by the main body moving device 7, and the meandering compensation is performed. Function works.

The moving linear velocity in the width direction of the winding device main body 1 is set to be equal to or higher than the minimum velocity required for the meandering compensation function, and is equal to or lower than the maximum permissible limit velocity at which wrinkles and sagging are not generated in the film-shaped molded product 3. Preferably, the effects of the present invention due to the swinging of the meandering detector 6 cannot be expected outside the range of the linear velocities.
However, the moving linear velocity depends on the apparatus used and the film-shaped molded product to be wound, and cannot be unconditionally specified.

The moving width and the moving linear velocity in the width direction of the winding device main body 1 during oscillation in the present invention are set by the device used and the film-shaped molded product to be wound. Width is 500 to 5,000 mm
In the case of the polyethylene sheet, the width of movement of the winding device main body 1 during oscillation is preferably within 50 mm, more preferably from 10 to 50 mm.
If it is less than 10 mm, the effect of oscillation cannot be sufficiently exerted, and if it exceeds 50 mm, the width of the tab of the sheet becomes large and the loss increases, resulting in an increase in cost.

Further, the winding device body 1 at the time of oscillation
When the film-shaped molded product 3 is wound at a winding speed of about 10 m / min, the moving linear velocity in the width direction is preferably 3 to 25 mm / min, and if it is less than 3 mm / min, a sufficient effect cannot be obtained.
If it exceeds 5 mm / min, it may cause wrinkles in the film-shaped molded product 3.

[0024]

EXAMPLE Using the apparatus shown in FIG. 1, a thickness of 30 μm,
A polyethylene film with a width of 1,000 mm is 10 m
The film was wound at a speed of 1 / min and under the conditions shown in Table 1. The results are shown in Table 1. The evaluation was performed based on the following criteria.

As a comparative example, the polyethylene film was wound up by the conventional oscillation method without activating the meandering compensation function, or the polyethylene film was activated without activating the meandering compensation function and oscillating function. The film was wound up. The results are shown in Table 1.

Winding ◯: There is no hump on the winding roll and there is no overall inclination, and the winding is good. X: There is a partial hump or overall inclination on the winding roll. Appearance of the film after rewinding : The rewound film has no wrinkles and slack and has a good surface. X: Wrinkles and slack are seen on the rewound film.

[0027]

[Table 1] As is clear from Table 1, even if the film-like molded product has meandering and thickness unevenness at the same time, by combining the oscillation function and the meandering compensation function, the film can be wound well and wrinkles after unwinding can be improved. A film having no sagging or uneven thickness was obtained.

[0028]

EFFECT OF THE INVENTION When a film-shaped molded product such as a film is wound up, the winding appearance of the winding roll is good, and when the winding roll is unwound, the rewound film or the like has uneven thickness,
An effect that wrinkles, sagging, etc. do not occur.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a specific example of an apparatus used for carrying out the method of the present invention.

FIG. 2 is a schematic perspective view for explaining a conventional method.

FIG. 3 is a schematic perspective view for explaining a conventional method.

FIG. 4 is a partially omitted schematic perspective view for explaining the method of the present invention in more detail.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Winding device main body, 2 ... Winding drum, 3 ... Membrane shaped article, 4, 5 ... Roller 6 ... Meandering detector, 7 ... Winding device main body moving device, 8 ... Meandering detector moving device, 9 ... Winding drum rotary shaft, 10 ... moving rail, 11 ... moving carriage, 12 ... meandering film-shaped molded product, 13 ... oscillation setting device, 14, 15 ... ear cutter, 16, 17 ... ear portion, 18 , 19 ... Ear reels,
20 ... Winding shaft, 21 ... Ear winding motor, 22 ... Assumed line, 23 ... Assumed locus, 24 ... Meandering film-shaped molded product, 2
5 ... Assumed trajectory.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65H 18/10 B29D 7/01 B65H 23/038

Claims (2)

(57) [Claims] 1. A by a winding drum in a method for winding a film-shaped molded product, serpentine compensation function and oscillation established a meandering detector of the film-like molded product is normally held the winding shape of the film-shaped molded product The activation functions simultaneously ,
If the film-shaped molded product has no meandering, an oscillation
The meandering inspection is performed according to the width and linear velocity set by the detector.
The film-shaped molding caused by vibrating the intellectual device in the width direction
The meandering detector detects the deviation from the object, and the main body moving device
Is activated and the wobbling detector swings by the amount of swing.
The film-shaped molded product to meander.
If the meandering detector detects a deviation from the film-shaped molded product,
In order to know, the widthwise movement of the winding device body is
Add the meandering correction part to the operation of only the
Therefore, the film-shaped molded product and the meandering detector do not move relative to each other.
As the meandering detector follows,
A method for winding a film-formed product, which comprises winding the film-formed product by operating a meandering compensation function for operating the winding device body . 2. The film according to claim 1, wherein the meandering detector is oscillated in a width direction of the film-shaped molded product in a constant cycle or aperiodically to wind up the film-shaped molded product. Method for winding shaped article.