JPH1015885A - Manufacturing method of thin film - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A deformation is corrected even for a warp that occurs randomly in the width direction to prevent wrinkles. A rubber tube roller is mainly composed of a rubber tube that is formed into a cylindrical shape by filling compressed air as a fluid having a predetermined pressure, and a rubber tube.
A sleeve 42 is inserted and held in a through hole 40 extending in the center in the axial direction. By using the rubber tube type roller 36, the entire outer peripheral surface of the rubber tube type roller 36 sinks from the initial position with the magnetic tape 4, and the entire magnetic tape 4 comes into close contact with the outer peripheral surface of the rubber tube type roller 36. As a result, the occurrence of tensile unevenness in the running direction is suppressed by the undeformed tape portion and the deformed tape portion,
The generation of wrinkles due to uneven tension can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents the generation of wrinkles when a plurality of narrow thin films are manufactured by cutting a thin film such as a wide magnetic tape drawn from a raw material in the longitudinal direction. So on how to do it.

[0002]

2. Description of the Related Art In a manufacturing process, a magnetic tape such as an audio tape or a video tape is coated with a paint as a recording medium on the surface of a wide film, heated and dried, and then wound on a raw material. The wound magnetic tape is cut in a longitudinal direction by a cutting device to form a plurality of narrow magnetic tapes. That is, as shown in FIG. 1, the cutting device 2 includes a raw material 6 on which a wide magnetic tape 4 is wound in a roll state, a pair of nip rollers 8 for extracting the magnetic tape 4 from the raw material 6, and a nip roller 8. A tension roller 10 for tensioning the magnetic tape 4 drawn out between the web 6 and the web 6, and a pair of guide rollers 12 disposed before and after the tension roller 10 in the running direction of the magnetic tape 4 to guide the magnetic tape 4; 14, a cutting roller 18 that cuts the magnetic tape 4 that has passed through the pair of nip rollers 8 in the longitudinal direction to form a narrow magnetic tape 16, and alternately separates and pulls the cut magnetic tape 16 vertically. Nip rollers 20 and 22 disposed above and below
It comprises guide rollers 24 and 26 disposed between the tapes 0 and 22 and the cutting roller 18, and upper and lower winding rollers 28 and 30 for winding the cut magnetic tape 16.

In such a manufacturing process, a magnetic tape is coated with a coating material having a uniform thickness, dried by heating, and wound around an original fabric. In the heating and drying process, warpage occurs on both sides or the center in the width direction. . In order to correct such a warp, an inverted crown roller 32 or a crown roller 34 shown in FIG. 4 is conventionally used in a cutting process. For example, one guide roller 12 and a tension roller of the cutting device 1 shown in FIG. An inverse crown roller 32 is appropriately disposed on the roller 10 and a crown roller 34 is appropriately disposed on the other guide roller 14 to correct the warpage of the magnetic tape 4 pulled out from the raw material 6 during running. .

[0004]

If it can be predicted that the warp generated in the magnetic tape 4 will be formed at a fixed position at the center or both sides in the width direction, it is corrected by disposing the rollers 32 and 34 at predetermined positions in advance. be able to. That is, as shown in FIG. 5, when the warp C occurs in the center of the magnetic tape 4 in the width direction, the warp can be corrected by disposing the crown roller 34 near the upstream of the nip roller 8. However, as shown in FIG.
If the crown S is disposed near the upstream side of the nip roller 8 when the warp S occurs on both sides in the width direction of the magnetic tape 4, deformation increases due to uneven tension (uneven tension), and wrinkles D occur on the nip roller 8. Will be done.

Since the warpage of the magnetic tape occurs randomly in the width direction, it is difficult to predict the warp, and the conventional correction using the combination of the inverted crown roller 32 and the crown roller 34 has not been effective. Therefore,
SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a thin film capable of preventing deformation by correcting deformation even in a warp occurring randomly in the width direction.

[0006]

According to the present invention, a wide thin film wound around a raw material is provided by a pair of guide rollers and a tension roller disposed between the guide rollers. After being mounted, it is sandwiched between a pair of nip rollers, and while applying tension in the extending direction of the thin film by the tension roller, the thin film is pulled out from the raw material by rotation of the nip roller, and then cut in the longitudinal direction to obtain a plurality of pieces. When manufacturing a thin film of narrow width, as a guide roller of the pair of guide rollers on the side closer to the nip roller, using a rubber tube type roller formed of rubber and having a thin and hollow cylindrical shape, the thin film is When passing through the rubber tube type roller, the outer peripheral surface of the rubber tube type roller is The entire width portion of the thin film is shaped, characterized in that so as to close contact with the outer peripheral surface of the rubber tube type roller.

In the present invention, the entire magnetic tape is in close contact with the outer peripheral surface of the rubber tube type roller. As a result, the occurrence of tensile unevenness in the running direction is suppressed by the undeformed tape portion and the deformed tape portion, and wrinkles due to tensile unevenness generated in the undeformed tape portion and the deformed tape portion are suppressed. Can be prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described based on an apparatus. FIG. 2 is a cross-sectional view of the rubber tube type roller, and FIG. 3 is an explanatory diagram showing a state in which the warpage of the magnetic tape is corrected. In FIG. 2, reference numeral 36 denotes a rubber tube type roller, and the rubber tube type roller 36 is
A rubber tube 38 which is formed into a cylindrical shape mainly by filling compressed air as a fluid having a predetermined pressure, a sleeve 42 inserted and held in a through hole 40 extending in the axial center of the rubber tube 38, And a rotation shaft 43 inserted through the rotation shaft 43. For details, see Rubber Tube 38
Has the same diameter as the diameter of the guide roller 14 shown in FIG.

The sleeve 42 is provided with flange-shaped holding plates 44 and 46 on both sides. One holding plate 44 is formed integrally with the sleeve 42, and the other holding plate 46 is detachable from the sleeve 42. Has become. That is, the sleeve 42 is inserted into the through hole 40 of the rubber tube 38, one end of the sleeve 42 is in contact with one of the pressing plates 44, and the other pressing plate 46 is inserted into the opposite side of the sleeve 42 to form a screw formed on the outer periphery of the sleeve 42. By tightening the nut 47, the rubber tube 38 is regulated and held in the axial direction. Here, a side of the other holding plate 46 is provided with a compressed air inlet 48 incorporating a check valve (not shown) for communicating with the rubber tube 38. The rubber tube 38 is made of rubber.
When compressed air is supplied from 8, expansion is formed into a cylindrical shape. Next, bearings 50 and 52 are attached to both ends in the sleeve 42, and the rotating shaft 43 is inserted through the bearings 50 and 52 to hold the rubber tube 38 rotatably.

The rubber tube type roller 36 constructed as described above is disposed before and after the tension roller 10 disposed between the raw material 6 and the nip roller 8 in the magnetic tape running direction as shown in FIG. A pair of guide rollers 12 and 14
1 (see FIG. 1), it is used in place of one guide roller 14 disposed near the nip roller side. By using the rubber tube type roller 36, the entire outer surface of the rubber tube type roller 36 sinks from the initial position shown by the dotted line (a) in FIG. The entire magnetic tape 4 comes into close contact with the outer peripheral surface of the rubber tube type roller.

As a result, the occurrence of tension unevenness (tension unevenness) in the running direction is suppressed by the undeformed tape portion and the deformed tape portion, whereby the undeformed tape portion is deformed. Wrinkles due to uneven tension occurring at the tape portion can be prevented. Since the rubber tube 38 is formed in a uniform cylinder over the entire length in the longitudinal direction, even if the positional relationship of the warpage C randomly generated in the width direction of the magnetic tape 4 is unpredictable, the deformation is increased by this. Without wrinkles, the generation of wrinkles can be effectively prevented.

[0012]

As described above, according to the present invention, a wide thin film wound around an original fabric is mounted on a pair of guide rollers and a tension roller provided between the guide rollers. The thin film is pulled out from the raw material by the rotation of the nip roller while applying tension in the extending direction of the thin film by the tension roller while being sandwiched between a pair of nip rollers, and then cut in the longitudinal direction to form a plurality of narrow films. When manufacturing a thin film, a rubber tube type roller formed of rubber and formed in a thin, hollow cylindrical shape is used as a guide roller on the side near the nip roller of the pair of guide rollers, and the thin film film is formed of a rubber tube type. When passing through the roller, the outer peripheral surface of the rubber tube type roller is deformed by a thin film The entire width portion of Irumu was set to be in close contact with the outer peripheral surface of the rubber tube type roller. For this reason, the entire magnetic tape is in close contact with the outer peripheral surface of the rubber tube type roller, and it is possible to prevent wrinkles due to uneven tension occurring between the undeformed tape portion and the deformed tape portion.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an outline of a cutting machine for cutting a thin film.

FIG. 2 is a sectional view of a rubber tube type roller showing one embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a state in which a warp formed on a magnetic tape is corrected by a rubber tube type roller of the present invention.

FIG. 4A is a perspective view of an inverted crown roller conventionally used for correcting a warp of a magnetic tape, and FIG. 4B is a perspective view of a crown roller.

FIG. 5 is an explanatory diagram of a state in which a warp generated at the center in the width direction of the magnetic tape is corrected using a crown roller.

FIG. 6 is an explanatory diagram of a state in which warpage generated on both sides in the width direction of the magnetic tape is corrected using a crown roller.

[Explanation of symbols]

2 ... cutting device, 4 ... thin film (magnetic tape),
6 ... raw material, 8 ... nip roller, 10 ... tension roller, 12, 14 ... guide roller, 36 ... rubber tube type roller, 38 ... rubber tube, 40 ... through hole, 42 ... sleeve , 48 ... Injector, C, S ...
Warp, D ... wrinkles.

Claims (3)

[Claims] 1. A wide thin film wound around a web is mounted between a pair of guide rollers and a tension roller disposed between the guide rollers, and then sandwiched between a pair of nip rollers. When a thin film is drawn from the raw material by rotation of the nip roller while applying tension in the direction in which the thin film extends by a tension roller, and then cut in the longitudinal direction to produce a plurality of narrow thin films, As a guide roller on the side closer to the nip roller among the guide rollers, a rubber tube-type roller made of rubber and formed in a thin, hollow cylindrical shape is used, and when the thin film passes through the rubber tube-type roller, The outer peripheral surface of the rubber tube type roller is deformed, and the entire area in the width direction of the thin film is rubberized. And so as to close contact with the outer peripheral surface of over Bed type roller, manufacturing method of a thin film, characterized in that. 2. The rubber tube type roller includes a cylindrical sleeve, a hollow cylindrical rubber tube disposed on an outer peripheral portion of the sleeve, and a shaft inserted inside the sleeve. A method for producing a thin film according to claim 1. 3. The method for producing a thin film according to claim 2, wherein flanges are provided at both ends in the longitudinal direction of the sleeve, respectively, to contact an end face of the rubber tube.