JPH0664145A - Curl removing device - Google Patents

Abstract

PURPOSE:To remove the curling of a raw fabric easily and with good accuracy without marking on the surface of the raw fabric. CONSTITUTION:A device comprises a heating device 13 disposed on the downstream side of a feeding roll 11 and heating a raw fabric 20 to the temperature to correspond to the take-up diameter of the feeding roll 11, a small diameter roller 14 disposed on the downstream side of the heating device 13 and winding the raw fabric 20 in tension in the direction reverse to the winding direction of the feeding roll 11 and a cooling device 18 disposed on the downstream side of the small diameter roller 14. The raw fabric 20 heated and softened by the heating device 13 is bent in the small radius in the direction reverse to the curling direction by forming the diameter of the small diameter roller 14 almost 200 times or less of the thickness of the raw fabric to remove the curling effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decurling device for a synthetic resin material used for manufacturing cards such as prepaid cards.

[0002]

2. Description of the Related Art Conventionally, a prepaid card is manufactured by printing an original fabric made of a synthetic resin and then punching the printed original fabric into individual cards by a punching machine.

By the way, the original fabric is generally made of a sheet material such as polyethylene terephthalate, and the surface of the original fabric is offset-printed by a printing machine.

The raw fabric is continuously fed from the supply roll to the printing machine, but it is necessary to remove the curl of the raw fabric wound up from the supply roll before entering the printing machine.

[0005]

As described above, since the original fabric is continuously supplied from the supply roll to the printing machine, it is necessary to remove the curl of the original fabric.

As a method of removing the winding habit, there are a method of repeating winding and rewinding, a method of squeezing a raw material with a bar, and a method of removing the curl of the raw material between a plurality of rollers. It is considered.

However, in the method of performing the winding and rewinding, it is necessary to rewind after the rewinding, and the winding habit may be reestablished.

Further, in the case of the method of squeezing the original fabric or passing it between a plurality of rollers, it is possible that the surface of the synthetic resin original fabric is scratched.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a curl removing device capable of surely removing the curl without damaging the surface of the original fabric. And

[0010]

DISCLOSURE OF THE INVENTION The present invention is provided with a heating device arranged downstream of a supply roll for supplying a synthetic resin original fabric, for heating the original fabric, and a downstream side of the heating device. The small-diameter roller includes a small-diameter roller that winds the original fabric in a tension state in a direction opposite to the winding direction of the supply roll, and a cooling device that is arranged downstream of the small-diameter roller and cools the original fabric. Is about 200 times or less the thickness of the material roll, and a winding diameter measuring device for measuring the winding diameter of the supply roll is provided in the vicinity of the supplying roll. The curl removing device is connected with a heating control device for controlling the heating device so as to heat the raw material at a heating temperature corresponding to the above.

[0011]

According to the present invention, the raw material is heated by the heating device at the heating temperature corresponding to the winding diameter of the supply roll measured by the winding diameter measuring device by controlling the heating roll.
The heated and softened original fabric is supplied to a small-diameter roller having a thickness of about 200 times or less of the original fabric thickness and wound in a tension state in a direction opposite to the winding direction of the supply roll, thereby The curl can be effectively removed, and by further cooling with a cooling device, the original fabric can be cured to a normal original hardness with the curl removed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are views showing an embodiment of a curl removing device according to the present invention.

In the figure, a curl removing device 10 for removing the curl of the original fabric 20 is disposed downstream of a supply roll 11 for supplying an original fabric 20 made of synthetic resin, for example, polyethylene terephthalate (PET). ing.

The curl removing device 10 is provided with a brake roller 12 for applying a predetermined tension to the original fabric 20, a heating device 13 arranged downstream of the brake roller 12, and a downstream side of the heating device 13. The small-diameter roll 14 and the cooling device 18 arranged on the downstream side of the small-diameter roll 14 are provided.

Of these, the brake roller 12 applies a brake to the material 20 sent to the printing machine (not shown),
The brake roller applies a predetermined amount of tension to the raw material 20 on the downstream side.

The heating device 13 is for heating the material 20. The hot air passing through the heater 15 is sent to the heating device 13 by the blower 16 via the duct 22 and is returned from the heating device 13 to the duct 23. It is designed to be returned to the blower 16 via. In addition, the heating device 13 is the original 2
It is possible to move (retract) in the width direction of 0.

Further, as shown in FIG. 2, the small-diameter roller 14 is opposite to the winding direction of the supply roll 11 (counterclockwise direction).
Then, the original fabric 20 is wound about 1/4 turn. The diameter of the small-diameter roller 14 is about 20 mm, and the value of this diameter is 100 times the thickness of the original fabric 20 of about 0.2 mm.

Further, at the downstream side of the small diameter roller 14, a cooling device 18 for cooling the raw material 20 from which the winding tendency is removed by the small diameter roller 14 is arranged. The cooling device 18 has blow-out holes (not shown) for blowing cold air toward the material 20.
Is formed and the blower 1
Cold air is sent from the duct 9 through the duct 24.

Further, a control device 21 is arranged above the cooling device 18. As shown in FIG. 5, the control device 21 includes a heating control device 21 a that controls the heating temperature of the heating device 13, a width direction control device 21 b that controls the movement of the heating device 13 in the width direction, and an original fabric by the brake roll 12. A tension control device 21c for controlling the tension of 20 is built in. In this way, the heating device 13 is controlled by the controller 21.
The heating temperature is controlled to an optimum temperature corresponding to the winding diameter of the supply roll 11 as described later, and when the supply of the raw fabric 20 is stopped, the heating device 13 is moved in the width direction of the raw fabric 20. The material 20 is to be evacuated.

The components of the curl removing device are housed in the frame 25 as a whole.

Next, the operation of this embodiment having such a configuration will be described.

First, the original fabric 20 is supplied from the supply roll 11 to the curl removing device 10.

The original sheet 20 supplied to the curl removing apparatus 10
Are conveyed to the brake roller 12. The original 20 is braked by the brake roller 12, and a predetermined amount of tension is generated on the original 20 on the downstream side of the brake roller 12.

Next, the material 20 is heated by the heating device 13 and conveyed to the small diameter roller 14.

In this case, the winding diameter of the supply roll 11 is measured by the winding diameter measuring device 28 provided in the vicinity of the supply roll 11, and the measured winding diameter is input to the heating control device 21a. Then, in the heating control device 21a, the heating temperature of the heating device 13 corresponding to the winding diameter of the supply roll 18 is calculated. The heating temperature of the heating device 13 is controlled based on the calculation result of the heating control device 21a.

In the heating control device 21a, the heating temperature is calculated as follows. For example, as shown in FIG.
When the conveying speed of 0 is 20 m / min, the optimum heating temperature changes from 50 ° C. to 80 ° C. as the winding diameter of the supply roll 11 gradually decreases from 350 mm to 200 mm. Therefore, the heating temperature of the heating device 13 is adjusted to the optimum heating temperature according to the decrease in the winding diameter of the supply roll 11. For example, when the winding diameter is 350 mm, the optimum heating temperature is 50 °, when the winding diameter is 300 to 250 mm, the optimum heating temperature is 70 °, and when the winding diameter is 200 mm, the optimum heating temperature is It becomes 80 °. Here, the optimum heating temperature of 80 ° C. when the winding diameter is 200 mm corresponds to the glass transition point of polyethylene terephthalate.

The original fabric floating amount in FIG. 3 is the amount of floating when a sample of 400 mm × 260 mm is prepared from the original fabric 20 after the curl is removed and the sample is placed on a horizontal plane ( (Fig. 4).

The raw material 20 reaching the small-diameter roller 14 is wound around the small-diameter roller 14 by 90 ° in the direction opposite to the winding direction of the supply roll 11. The web 20 wound around the small-diameter roller 14 is wound in a tension state and with a small radius, so that the winding habit formed by the supply roll 11 can be removed.

That is, the small-diameter roller 14 has a small diameter of 20 mm with respect to the original material having a thickness of 0.2 mm. Therefore, when the raw fabric 20 heated by the heating device 13 and softened is wound around the small-diameter roller 14 under tension, the raw fabric 20 has a radius smaller than the thickness of the raw fabric 20.
It will be bent in the direction opposite to the curl direction of
Can be plastically deformed to effectively remove the curl.

According to the experimental results of the applicant of the present invention, the diameter of the original fabric is 0.2 mm and the diameter is 40 mm (the original fabric thickness x 2).
When the small-diameter roller 14 up to 00 times) was used, the curl was successfully removed. However, when the small diameter roller 14 having a diameter of 40 mm or more was used, the curl was not sufficiently removed.

Roll 2 from which the curl is removed by the small-diameter roller 14
0 immediately enters the cooling device 18 and the cooling device 1
Cold air is blown from 8 to cool to room temperature. The original fabric 20 cooled by the cooling device 18 is cured again to a normal original fabric hardness with the curl removed, and is transported to the printing machine (not shown) side.

As described above, according to the present embodiment, the raw material 20 is heated to the heating temperature corresponding to the winding diameter of the supply roll,
Then, by winding it around the small-diameter roller 14 in a tensioned state, it is possible to easily and accurately remove the winding habit of the original fabric 20 without damaging the surface of the original fabric 20.

[0034]

As described above, according to the present invention,
It is possible to easily and accurately remove the curl of the original fabric without damaging the surface of the original fabric.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a curl removing device according to the present invention.

FIG. 2 is an enlarged side view of a small diameter roller of the curl removing device.

FIG. 3 is a diagram showing the relationship between the heating temperature of the heating device and the amount of floating of the original fabric.

FIG. 4 is a side view showing a lift amount of a raw fabric.

FIG. 5 is a detailed view showing a control device.

[Explanation of symbols]

 10 Curling Removal Device 11 Supply Roll 12 Brake Roller 13 Heating Device 14 Small Diameter Roller 18 Cooling Device 20 Raw Fabric 21 Control Device 21a Heating Control Device 28 Winding Diameter Measuring Instrument

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical display location // B29L 7:00 4F (72) Inventor Keiichi Kotani 1-chome, Kanicho, Ichi, Shinjuku-ku, Tokyo No. 1 in Dai Nippon Printing Co., Ltd.

Claims (1)

[Claims] 1. A heating device which is arranged downstream of a supply roll for supplying a synthetic resin original fabric and heats the original fabric, and a winding direction of the supply roll which is arranged downstream of the heating device. A small-diameter roller that winds the original fabric in a tension state in the opposite direction, and a cooling device that is arranged on the downstream side of the small-diameter roller to cool the original fabric, and the diameter of the small-diameter roller is the thickness of the original fabric. About 200 times or less, and a take-up diameter measuring device for measuring the take-up diameter of the supply roll is provided in the vicinity of the supply roll, and the take-up diameter measuring device has the heating temperature corresponding to the take-up diameter of the supply roll. A curl removing device connected to a heating control device for controlling the heating device so as to heat the fabric.