JP2001063887A - Sheet roll body manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sheet from being creased or flapping and to reduce flaws formed in accelerating/decelerating carrier rollers. SOLUTION: This sheet roll body manufacturing device comprises an unwinding part 10 for unwinding a wide sheet F from a wide sheet roll body 1; a carrier roller group 11 comprising a plurality of carrier rollers 3 for conveying the wide sheet F; a slitting part 12 disposed in the conveying path of the carrier roller group 11 to divide the wide sheet F in a plurality of narrow sheets (f); and winding parts 13 for winding the narrow sheets (f) to form sheet roll bodies 5. Out of the carrier roller group 11, at least the carrier rollers directly upstream of the winding parts 13 are formed of fiber reinforced resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a sheet roll, and more particularly, to a sheet roll which divides a wide sheet such as a synthetic resin film into a plurality of narrow sheets to form a stable sheet roll. Related to a manufacturing apparatus.

[0002]

2. Description of the Related Art Synthetic resin films are used in many fields such as electric component materials, packaging materials, and building materials. As described above, as a method of manufacturing a synthetic resin film to be used for various purposes, from a viewpoint of production rationalization, first, a molten resin is formed by extruding a wide sheet from a die, and once winding as a sheet roll body, The wide sheet is unwound from the sheet roll body, divided into narrow sheets set for each application, and wound again on the sheet roll body.

An apparatus for forming a sheet roll divided into narrow sheets in this way is called a slitter. This slitter divides a wide sheet unwound from a wide sheet roll body into a plurality of narrow sheets at a slit part in the course of conveyance while conveying the wide sheet by a conveying roll group, and winds it as a sheet roll body at a winding part. It has become. In general, the transport roll group is composed of metal transport rollers, and the divided narrow sheet is wound around the winding section while giving an appropriate tension to form a stable roll of sheet roll. ing.

However, the metal transport roller has a large deflection due to its own weight, and a different transport path line is formed in the width direction of the sheet due to the deflection of its own weight, so that the sheet is wrinkled or fluttered, and is wound on a sheet roll body. There was a problem of making it unstable. In addition, since the metal transport roll has a large moment of inertia, the time required to raise the stationary transport roll to the transport speed for steady operation at the start of operation and the time required to stop the transport speed for steady operation at the end of operation are long. In such a case, even in a steady operation, the ability to follow the speed fluctuation of the sheet due to the fluctuation of the tension may be deteriorated. During this time, the relative surface speed change between the conveying roll and the sheet occurs, and the sheet and the conveying There is a problem that the sheet is scratched due to slippage.

[0005] Further, a metal transport roll has a large natural weight and therefore has a low natural frequency, and when operated at a high speed, the vibration becomes large. .

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to reduce the occurrence of scratches when accelerating or decelerating a transport roll without causing wrinkles or flutter on the sheet. It is an object of the present invention to provide an apparatus for manufacturing a sheet roll body.

[0007]

In order to achieve the above object, a sheet roll manufacturing apparatus according to the present invention comprises: an unwinding unit for unwinding a wide sheet from a wide sheet roll; and a plurality of conveying units for conveying the wide sheet. A transport roll group composed of rolls,
A slit portion disposed in a transport path of the transport roll group to divide the wide sheet into a plurality of narrow sheets; and a winding portion configured to wind the narrow sheet to form a sheet roll body. In the roll group, at least the main body of the transport roll disposed immediately before the upstream side of the winding section is made of a fiber-reinforced resin.

[0008] As described above, since at least the transport roll immediately upstream of the winding section is made of fiber reinforced resin, the specific rigidity (= elastic modulus / density) of the transport roll is increased, and as a result, deflection due to its own weight is reduced. can do.
Accordingly, the conveying path line in the sheet width direction in the conveying roll is made substantially linear, so that wrinkles and flapping are not generated, so that a sheet roll body having excellent quality can be formed.

In addition, since the transport roll is made of fiber reinforced resin and lightened, the moment of inertia is reduced, the time required for changing to a predetermined speed can be shortened, and the followability to speed fluctuation during steady operation can be achieved. It goes up. Therefore, it is possible to reduce scratches on the sheet surface caused by friction between the sheet and the transport roll therebetween. In addition, since the dangerous speed becomes higher, higher-speed operation becomes possible, thereby improving the productivity and reducing the occurrence of vibration.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings.

In the present invention, the sheet refers to a thin-film strip such as a synthetic resin film, a thin metal plate (metal foil), or paper. It is particularly effective when a sheet roll is formed by dividing a wide sheet into a plurality of narrow sheets for a synthetic resin film.

FIG. 1 shows a slitter of a synthetic resin film illustrating the apparatus of the present invention. The slitter includes an unwinding unit 10, a conveying roll group 11, a slit unit 12, and a winding unit 1 along a moving direction of a sheet (synthetic resin film).
3 are arranged in order.

The unwinding section 10 has a torque motor 2 connected to a support shaft for supporting a sheet roll body 1 on which a wide sheet (synthetic resin film) F is wound. Is to be rolled out. Of course, the unwinding means is not particularly limited as long as the torque (tension) can be controlled. For example, a brake such as a powder brake or an electromagnetic brake is connected to the support shaft of the sheet roll body 1. There may be.

The transport roll group 11 is composed of a plurality of transport rolls 3, and a slit section 12 is arranged in the middle of the transport to divide the wide sheet F into a plurality of narrow sheets f. Each of the plurality of transport rolls 3 has a roll body made of a fiber reinforced resin, and a transport roll 3a disposed in the middle thereof rotates as a speed regulating roll at the same surface speed as the sheet transport speed.
In order to convey the sheet at the same surface speed in this manner, the illustrated conveying roll 3a is constituted by a suction roll having suction holes on the surface.

The transport roll 3 disposed on the downstream side of the transport roll 3a rotates at a speed difference of 0.1% or more higher than the surface speed of the transport roll 3a (therefore, the sheet transport speed) to form a wide sheet F. Tension is applied so that the operation of dividing the wide sheet F into a plurality of narrow sheets f at the slit section 12 is smooth, and the winding operation of the winding section 13 is smooth. On the other hand, the transport roll 3a
The surface speed of the transport roll 3 disposed on the upstream side may be the same as the sheet transport speed or may have a difference in speed.

In order to strictly control the surface speed of each transport roll 3 of the transport roll group 11, a drive motor is provided for each transport roll 3 or a plurality of drive motors are provided. It is good to provide in the unit of every conveyance roll 3 of. Further, by reducing the number of rolls driven by one motor, the load on the motor is reduced, and controllability is improved.

The slit section 12 is composed of a plurality of blades 4a and a receiving roll 4b. The receiving blade roll 4b has a plurality of grooves along the circumferential direction of the surface, and the blade 4a is installed so as to partially insert each of these grooves. Receiving blade roll 4b
Is a plurality of blades 4a while conveying the wide sheet F at the same speed.
Divides the sheet into a plurality of narrow sheets f corresponding to each groove. As the slit portion 12, only a plurality of blades 4a may be arranged without providing the receiving blade roll 4b as shown, or a pair of rotating blades may be arranged corresponding to the division width. .

In the last winding section 13, a torque motor 6 is connected to a support shaft for supporting a sheet roll body 5 for winding the narrow sheet f, and the winding is performed while controlling the winding torque by the torque motor 6. Has become. Of course, the drive source is not limited to a torque motor as long as it can be wound by controlling the torque. For example, an induction motor or an AC servomotor may be used under torque control. In addition, a contact pressure roll 7 made of a rubber or metal free roll is provided, and the narrow sheet f is wound up while contacting the sheet roll body 5.

According to the present invention, in the above-described apparatus configuration, the transport rolls 3 (3e) arranged at least immediately before the upstream side of the winding section 13, preferably all the transport rolls 3 downstream from the slit section 12, more preferably Transport roll group 1
Regarding all the transport rolls 1, at least the roll body is made of a fiber reinforced resin.

Since the transport roll is made of a fiber-reinforced resin, the specific rigidity (= elastic modulus / density) of the transport roll is increased, and the deflection due to its own weight in the longitudinal direction of the roll can be reduced. Since the self-weight deflection in the longitudinal direction of the roll is substantially eliminated, the conveying path line in the sheet width direction on the conveying roll 3 becomes substantially linear, and as a result, the sheet does not wrinkle or flutter, and the roll is stabilized. Thus, it is possible to form a sheet roll body that has been formed.

Further, since the transport roll is made of a fiber-reinforced resin, the roll becomes lighter and the moment of inertia of the roll becomes smaller. Therefore, the time required to raise the transport roll from the stationary state to the transport speed of the steady operation at the start of the operation and the time required to stop the transport speed of the steady operation at the end of the operation are all reduced. Therefore,
During this time, scratches on the sheet surface caused by slippage between the transport roll and the sheet are also reduced.

In order to further ensure the above effects,
At least the transport rolls 3e disposed immediately before the upstream of the winding unit 13, preferably all the transport rolls 3 disposed downstream from the slit unit 12, and more preferably all the transport rolls 3 constituting the transport roll group 11. Self-weight deflection δ
(Mm) is preferably set to satisfy 2 × δ / L ≦ 1.2 × 10 ⁻⁴ with respect to the roll length L (mm).

The maximum and minimum values of the inertia moments of at least all of the transport rolls 3 disposed downstream from the slit 12, preferably all of the transport rolls 3 constituting the transport roll group 11. It is desirable that the ratio (= maximum value / minimum value) is within 1.3 so that the rolls have no variation.

The structure of the transport roll made of fiber reinforced resin is not particularly limited as long as at least the main body is made of fiber reinforced resin, but preferably has a structure as exemplified in FIG. desirable. That is, the roll body 30 of the transport roll 3 is made of fiber reinforced resin,
A coating layer 31 of rubber, resin, metal plating or the like is provided on the outer periphery. Further, a metal rotary shaft 32 is attached to both ends of the roll body 30. If the transport roll is composed only of the fiber reinforced resin body, the fibers exposed from the fiber reinforced resin may give a flaw to the sheet. can do.

In the present invention, the reinforcing fiber of the fiber-reinforced resin is not particularly limited as long as it has high strength and high elastic modulus. For example, carbon fiber, glass fiber, aromatic polyamide fiber and the like can be mentioned as preferable fibers. Among these, carbon fibers are particularly preferred.

As the matrix resin of the fiber reinforced resin, any matrix resin can be used as long as the adhesion to the reinforcing fiber is not hindered. For example, thermosetting resins such as epoxy resins, unsaturated polyester resins, and phenol resins, and thermoplastic resins such as nylon, polyester, and polyethylene can be used.

[0027]

EXAMPLE A wide polyester film having a width of 3300 mm and a thickness of 15 μm was divided into three narrow films having a width of 1000 mm while being conveyed at a sheet conveying speed of 400 m / min. The transport roll group 11 has the configuration of FIG.
As the transport rolls 3 other than the transport roll 3e immediately upstream of the winding unit 13, a roll of rubber coated with aluminum having a diameter of 370 × 5700 mm in diameter × length is commonly used,
Only the transport roll 3e has a diameter x length of 370 x 5700mm
Then, three types of apparatuses of Example 1 and Comparative Examples 1 and 2 in which the roll main bodies were made different as shown in Table 1 were used.

When sheet rolls were manufactured with these three types of apparatuses, wrinkles and flapping generated in each apparatus were measured according to the following measurement standards. The results shown in Table 1 were obtained.

Measurement criteria Wrinkle A test for winding a film having a winding length of 10,000 m was performed for 20 times.
The number of wrinkles was expressed as a percentage and classified according to the following criteria.

○: less than 5% △: 5 to 20% ×: more than 20% Flicking The same winding test as above was performed. At that time, the amount of flapping on the free path before the contact pressure roll (with respect to the film surface) (The amount of fluctuation in the vertical direction) was measured and classified according to the following criteria.

○: less than 1 mm △: 1-3 mm ×: more than 3 mm

[0032]

[Table 1]

[0033]

As described above, according to the present invention, the specific rigidity of the transport roll is increased because at least the transport roll main body immediately upstream of the winding section is made of a fiber-reinforced resin. The deflection can be reduced. As a result, the conveying path line in the sheet width direction on the conveying roll can be made substantially linear, and the sheet roll body can be formed without generating wrinkles or fluttering. In addition, the moment of inertia is reduced due to the reduced weight of the transport rolls, the time required to reach a predetermined speed at the start of operation or at the time of operation stop is shortened, and scratches caused by slip between the transport rolls and the sheet during that time are reduced. be able to.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a sheet roll body manufacturing apparatus of the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a transport roll used in the apparatus of FIG.

[Explanation of symbols]

 Reference Signs List 1 (wide) sheet roll body 2 torque motor 3a speed regulating roll 3b transfer roll 4a blade 4b receiving blade roll 5 (narrow width) sheet roll body 6 torque motor 10 unwinding section 11 transport roll group 12 slit section 13 winding up Part F Wide sheet f Narrow sheet

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kojun Ishida 1-1-1 Sonoyama, Otsu-shi, Shiga F-term in the Shiga Plant of Toray Industries (reference) 3F055 AA05 DA01 3F104 AA03 JC07 KA05

Claims (7)

[Claims] 1. An unwinding unit for unwinding a wide sheet from a wide sheet roll body, a transport roll group including a plurality of transport rolls for transporting the wide sheet, and a transport roll group disposed in a transport path of the transport roll group. A slit section for dividing the wide sheet into a plurality of narrow sheets, and a winding section for winding the narrow sheet to form a sheet roll body, at least upstream of the winding section in the transport roll group. An apparatus for manufacturing a sheet roll body in which the main body of the transport roll disposed immediately before the side is made of fiber reinforced resin. 2. The sheet roll body manufacturing apparatus according to claim 1, wherein at least a main body of the transport roll, which is disposed downstream from the slit, in the transport roll group is made of a fiber-reinforced resin. 3. A ratio of the maximum value to the minimum value of the inertia moment of at least the transport rolls disposed downstream from the slit portion in the transport roll group is 1.3 or less. 3. The apparatus for manufacturing a sheet roll body according to 1. 4. The self-deflection δ of at least the transport roll disposed immediately upstream of the winding section in the transport roll group is 2 × δ / L with respect to the length L of the transport roll.
The apparatus for manufacturing a sheet roll body according to claim 1, 2 or 3, wherein ≤ 1.2 x ^10-4 . 5. The sheet roll body manufacturing apparatus according to claim 1, wherein a drive motor is connected to the transport roll group for each transport roll or for each of a plurality of transport rolls. 6. The apparatus according to claim 1, wherein the reinforcing fibers of the fiber-reinforced resin are carbon fibers, glass fibers, or aromatic polyamide fibers. 7. A method for manufacturing a sheet roll body, wherein the apparatus according to claim 1 is used to form a sheet roll body.