JP3291245B2 - Film laminating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a film laminating apparatus. More specifically, the present invention relates to a film laminating apparatus for laminating a plastic film on a metal sheet such as an aluminum plate or a steel plate to produce a film laminated metal sheet having corrosion resistance and gas impermeability.

[0002]

2. Description of the Related Art A conventional film laminating apparatus is shown in FIGS.
6 will be described. In FIG. 4, s is a metal sheet such as an aluminum thin plate or a steel thin plate, which is unwound from the unwinding roll 1 and guided by a guide roll, and the primary heating device 2, the nip roll 3, the secondary heating device 4 and the cooling zone 5 In order, the sheet is taken up by a take-up roll 8 via a guide roll 7 in a cooling tank 6.

[0003] The primary heating device 2 heats the metal sheet s by bringing the metal sheet s into contact with a plurality of heating rolls having a built-in electric heater, and heats the metal sheet s from room temperature to about 100 to 100 mm.
Heat to 200 ° C. The primarily heated metal sheet s is guided between the nip rolls 3, 3, and the plastic film f fed out from the unwinding roll 9 is pressed by the nip roll 3, whereby the metal sheet s is pressed.
To form a film-laminated metal sheet S.

[0004] The secondary heating device 4 and the cooling zone 5 reheat the film f to the melting point after lamination and then rapidly cool the film f to reduce the crystallinity of the film f to 10% or less.
It is provided for facilitating the can-making process of the film-laminated metal sheet S and the like.

The secondary heating device 4 comprises an electromagnetic induction heating device. As shown in FIGS.
A coil 45 in which the electric wire 42 is wrapped in multiple numbers is attached to the electric wire 1. The electric wire 42 has a water passage hole 42a for passing cooling water. Reference numeral 10 shown in FIG. 4 denotes a cooling water circulation circuit attached to the electromagnetic induction heating device 4, and a cooling water supply pipe 11 for passing cooling water through a water passage hole 42a of the electric wire 42;
A hot water recovery pipe 12, a pump 13 for pumping cooling water,
And a heat exchanger 14. The cooling water pumped from the pump 13 passes through the water holes 42 a of the electric wires 42 of the electromagnetic induction heating device 4, cools the electromagnetic induction heating device 4, returns to the heat exchanger 14 as hot water, and returns to the heat exchanger 14. Is discharged to the electromagnetic induction heating device 4 again by the pump 13 and circulated as cooling water.

[0006]

However, in the above-mentioned conventional example, the heat obtained by cooling the electromagnetic induction heating device 4 is simply discarded through the heat exchanger 14, and has not been used effectively. On the other hand, the primary heating device 2 needs to heat the metal sheet s from a room temperature state and heat it to 100 to 200 ° C., so that much power consumption is required.

[0007] In view of such circumstances, an object of the present invention is to provide a film laminating apparatus in which the heat energy of a cooling device is effectively used and the power consumption of a primary heating device is reduced as much as possible.

[0008]

According to a first aspect of the present invention, there is provided a film laminating apparatus comprising: a primary heating device including a plurality of heating rolls for preheating a metal sheet; a nip roll for laminating a plastic film on the metal sheet;
A secondary heating device for reheating the film-laminated metal sheet,
A film laminating apparatus provided with a cooling water circulation circuit for cooling the secondary heating device, wherein a heating roll on the inlet side of the primary heating device is configured by a hot water heating roll, and The hot water circulation circuit that takes out the hot water after cooling the heating device and supplies it to the inlet-side hot water heating roll and returns the water after heating the inlet-side hot water heating roll to the cooling water circulation circuit is branched. Features. 3. The film laminating apparatus according to claim 2, wherein the cooling water circulation circuit includes a cooling water supply pipe and a hot water recovery pipe connected between the secondary heating device and a heat exchanger. A feed pump is interposed in the path, and the hot water circulation circuit branches off from the hot water recovery pipe and is connected to an inlet port of an inlet-side hot water heating roll. A water return pipe branching off from the pipe and connected to an outlet port of the inlet-side hot water heating roll.

According to the first aspect of the present invention, the hot water after cooling the secondary heating device has a considerable amount of heat.
When this is supplied to the inlet-side hot water heating roll of the primary heating device by the hot water circulation circuit, the temperature of the metal sheet rises from room temperature to about 50 to 60 ° C. This reduces the amount of heating energy in the remaining heating roll. According to the invention of claim 2, hot water having a large amount of heat immediately after cooling of the secondary heating device can be supplied to the inlet-side hot water heating roll by the hot water supply pipe, so that the temperature rise of the metal sheet can be made as high as possible, In addition, the water that has been heated and lowered in temperature by returning the metal sheet is returned to the cooling water supply pipe in the water return pipe and is used again for cooling the secondary heating device, so that the water is not wasted.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a film laminating apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view of a primary heating device 2, and FIG. 3 is a partial cross-sectional front view of an inlet-side hot water heating roll 21.

In FIG. 1, an unwinding roll 1, a primary heating device 2, a nip roll 3, a secondary heating device 4, a cooling zone 5,
Since the cooling tank 6, the guide roll 7, and the winding roll 8 are not substantially different from the conventional example of FIG. 4, the same components are denoted by the same reference numerals and description thereof is omitted.

Reference numeral 30 denotes a hot water circulation circuit, which comprises a hot water supply pipe 31 and a water return pipe 32. And
The hot water supply line 31 branches off from the hot water recovery line 12 of the cooling water circulation circuit 10, and the water circulation line 32 branches off between the feed pump 13 and the heat exchanger 14 in the cooling water supply line 11. ing.

As shown in FIG. 2, the primary heating device 2
The heating roll 21 on the entry side is a hot water heating roll, and the other four heating rolls 2
Reference numerals 2 to 25 each include an electric heating roll. Guide rolls 27 and 28 are arranged before and after this primary heating device 2, and the metal sheet s is placed on the guide roll 27 on the entry side.
And enters the primary heating device 2 through each of the heating rolls 21 to 25
, And is heated while being wound around, and exits through the guide roll 28 on the exit side.

As shown in FIG. 3, the hot water heating roll 21 on the entry side has a threaded water passage 41 formed inside the roll, and has a water passage formed at the shaft portions at both ends at an inlet and an outlet of the water passage. The hot water supply pipe 31 and the water return pipe 32 are connected via rotary joints 42 and 43. The hot water heating roll 21 applies heat to the metal sheet running in contact with the roll surface by flowing hot water in the internal water passage 41, generally raising the temperature from room temperature to 50 to 60 ° C. Can be. Thereby, the amount of heating energy in the remaining heating rolls 22 to 25 decreases.
Further, the water that has been heated and lowered in temperature by returning the metal sheet s is returned to the cooling water supply line 11 by the water return line 32 and is again used for cooling the secondary heating device 4. There is no.

[0015]

According to the first aspect of the present invention, the hot water after cooling the secondary heating device is supplied to the inlet side hot water heating roll of the primary heating device, and the metal sheet is heated from room temperature to about 50 to 6 mm.
Since the temperature is raised to 0 ° C., the amount of heating energy in the remaining heating roll is reduced. According to the second aspect of the present invention, the water that has been heated and cooled by the metal sheet is returned to the cooling water supply line by the water return line and is used again for cooling the secondary heating device. There is no use.

[Brief description of the drawings]

FIG. 1 is a block diagram of a film laminating apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the primary heating device 2.

FIG. 3 is a partial sectional front view of an inlet-side hot water heating roll 21;

FIG. 4 is a block diagram of a conventional film laminating apparatus.

FIG. 5 is a partially enlarged view of the electromagnetic induction heating device.

FIG. 6 is an enlarged view of a coil 43.

[Explanation of symbols]

 2 Primary heating device 10 Cooling water circulation circuit 11 Cooling water supply line 12 Hot water recovery line 13 Feed pump 14 Heat exchanger 21 Inlet-side hot water heating roll 30 Hot water circulation circuit 31 Hot water supply line 32 Water return line

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuto Kanege 5-2, Sokai-cho, Niihama-shi, Ehime Prefecture Sumitomo Heavy Industries Machinery Co., Ltd. Niihama Works (72) Inventor Isamu Oku 3-4 Nittacho, Niihama-city, Ehime No. 23 Sumimec Co., Ltd. (56) References JP-A-4-8528 (JP, A) JP-T8-507984 (JP, A) JP-T8-507983 (JP, A) JP-T2 2- 501642 (JP, A) Table 2-501638 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 B29C 65/44 F25D 17/02

Claims (2)

(57) [Claims] 1. A primary heating device comprising a plurality of heating rolls for preheating a metal sheet, a nip roll for laminating a plastic film on a metal sheet, and a secondary heating device for reheating a film-laminated metal sheet. A film laminating apparatus provided with a cooling water circulation circuit for cooling the secondary heating device, wherein a heating roll on the inlet side of the primary heating device is configured by a hot water heating roll, and The hot water circulation circuit that takes out the hot water after cooling the heating device and supplies it to the inlet-side hot water heating roll and returns the water after heating the inlet-side hot water heating roll to the cooling water circulation circuit is branched. Characteristic film laminating equipment. 2. The cooling water circulation circuit includes a cooling water supply pipe and a hot water recovery pipe connected between the secondary heating device and a heat exchanger. A feed pump is interposed, and the hot water circulation circuit branches from the hot water recovery pipe and is connected to an inlet port of an inlet-side hot water heating roll, and branches from the cooling water supply pipe. 2. The film laminating apparatus according to claim 1, further comprising a water return pipe connected to an outlet port of the inlet-side hot water heating roll.