JPH11114983A - Sheet cooler for calender - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly cool a sheet by forming a pair of cooling belts obtained by laying endless belts across a pair of rolls, and disposing the belts at an output side of a calender and opposed surfaces of the belts brought into contact with both side surfaces of the sheet, thereby shortening a line length. SOLUTION: A pair of cooling belts 20, 21 made of endless belts 18, 19 obtained by bridging them between pairs of rolls 14, 15 and 16, 17 are moved at a speed substantially equal to a removing speed of a sheet 10 from a calender toward a downstream side of a sheet contact part 24 of an opposed surface. The sheet 10 formed by a calender is introduced between sheet contact parts 24 of a pair of upper and lower cooling belts 20 and 21. And, heat is derived from the sheet 10 at both sides by the belts 18, 19 while feeding the sheet 10 to a downstream side by movements of the belts 18, 19. The parts 24 of the belts 20, 21 are cooled by injecting refrigerants from refrigerant injection nozzles 23. Thus, high cooling ability can be obtained with a small size. A line length of a facility can be shortened. And, the sheet 10 can be rapidly cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calender sheet cooling apparatus, and more particularly, to a calender sheet cooling apparatus capable of shortening a line length and rapidly cooling sheets. It is.

[0002]

2. Description of the Related Art Resin sheets and films (hereinafter, referred to as "resin sheets")
Conventionally, calenders have been used to manufacture such sheets.

As shown in FIG. 2, for example, a conventional calender includes a plurality of calender rolls 2 to 5 arranged in a housing 1 (four calender rolls 2 to 5 are arranged in an inverted L shape in the figure). By forming the banks 6 to 8 between the adjacent calender rolls 2 to 5, supplying the resin 9 to the bank 6 between the calender rolls 2 and 3, and rotating each of the calender rolls 2 to 5. , Resin 6 in bank 6
Is rolled by calender rolls 2 and 3 and sent to bank 7,
The resin 9 of the bank 7 is rolled by calender rolls 3 and 4 and sent to the bank 8, and the resin 9 of the bank 8 is rolled by calender rolls 4 and 5 to form a sheet 10.

[0004] The sheet 10 thus formed is then subjected to a sheet cooling apparatus 1 having a plurality of cooling rolls 11.
2 and is wound by the winding device 13.

[0005]

However, the above-mentioned conventional calender sheet cooling apparatus has the following problems.

That is, the sheet cooling device 12 provided on the downstream side of the calender is composed of a plurality of cooling rolls 11, but in order to obtain a desired cooling capacity, the number of cooling rolls 11 must be increased. Since it cannot be obtained, there is a problem that the line length of the equipment becomes long.

Further, as described above, since the number of cooling rolls 11 to be installed is increased, the time required for cooling the sheet 10 becomes longer, and it is not possible to cool the sheet 10 rapidly to adjust the quality. Was.

The present invention has been made in view of the above circumstances, and has as its object to provide a sheet cooling device for a calender capable of shortening a line length and rapidly cooling a sheet.

[0009]

According to the present invention, a pair of cooling belts are formed by wrapping an endless belt between a pair of rolls.
The present invention relates to a calender sheet cooling device, characterized in that opposing surfaces of a belt are arranged so as to contact both surfaces of a sheet.

In this case, the last calender roll may be shared as the upstream roll constituting one of the cooling belts.

According to the above means, the following effects can be obtained.

The sheet formed by the calendar is
The sheet is cooled by a sheet cooling device provided on the outlet side of the calender.

More specifically, a pair of cooling belts, each of which is an endless belt stretched between a pair of rolls, is rotated at a speed substantially equal to the speed of taking out the sheet from the calender at a sheet contact portion which is an opposing surface. Is moved to the downstream side.

Then, the sheet formed by the calender enters between the sheet contact portions of the pair of upper and lower cooling belts, and is transported to the downstream side by the movement of the belt, while being cooled by being heated by the belt on both sides. .

At this time, the coolant is injected from the coolant injection nozzle toward the sheet contact portion of the cooling belt, thereby cooling the sheet contact portion of the belt.

As described above, when a pair of cooling belts are used as the sheet cooling device, the belt has a higher heat radiation property than the roll, so that a small-sized sheet cooling device having a high cooling capacity can be obtained.

Therefore, the line length of the equipment can be reduced, and the sheet can be rapidly cooled.

Further, by sharing the final calender roll as the upstream roll constituting the upper cooling belt, the line length of the equipment can be further reduced.

[0019]

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

FIG. 1 is an example of an embodiment of the present invention. The basic configuration of the calendar is the same as that of FIG. 2, and the same parts are denoted by the same reference numerals and description thereof will be omitted. I do.

In the present invention, a pair of cooling belts 20, 21 are formed by wrapping endless belts 18, 19 between a pair of rolls 14, 15, 16 and 17, and forming a pair of cooling belts 20, 21. Belt 18,1 on the exit side of the calendar
9 is characterized in that the sheet cooling device 22 is arranged vertically so that the opposing surfaces of the sheet 9 contact both surfaces of the sheet 10.

In the drawing, reference numeral 23 denotes a refrigerant injection nozzle disposed toward a sheet contact portion 24 formed on the opposing surfaces of the belts 18 and 19.

Further, the final calender roll 5 is shared as the upstream roll 14 constituting the upper cooling belt 20.

Next, the operation will be described.

The process of forming a sheet by a calendar is the same as that of FIG.

In the present invention, the sheet 10 formed by the calender is cooled by the sheet cooling device 22 provided on the exit side of the calender.

More specifically, endless belts 18 and 19 stretched between a pair of rolls 14, 15 and 16 and 17.
At a speed substantially equal to the speed at which the sheet 10 is taken out from the calender, so that the sheet contact portion 24, which is the opposing surface, moves toward the downstream side.

Then, the sheet 10 formed by the calender enters between the sheet contact portions 24 of the pair of upper and lower cooling belts 20 and 21, and is sent to the downstream side by the movement of the belts 18 and 19, and both sides of the belt 18 and the belt 18 are moved. The heat is taken away by 19 and cooled.

At this time, by injecting the refrigerant from the refrigerant injection nozzle 23 toward the sheet contact portion 24 of the cooling belts 20, 21, the sheet contact portion 2 of the belts 18, 19 is ejected.
Allow 4 to cool.

As described above, as the sheet cooling device 22,
When a pair of cooling belts 20 and 21 are used, the belt 1
Since the sheets 8 and 19 have higher heat dissipation than the rolls, the sheet cooling device 22 having a small size and a high cooling capacity can be obtained.

Therefore, the line length of the equipment can be reduced, and the sheet 10 can be rapidly cooled.

Further, by sharing the final calender roll 5 as the upstream roll 14 constituting the upper cooling belt 20, the line length of the equipment can be further reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0034]

As described above, according to the calender sheet cooling apparatus of the present invention, it is possible to provide an excellent effect that the line length can be shortened and the sheet can be rapidly cooled.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an example of an embodiment of the present invention.

FIG. 2 is a schematic side view of a conventional example.

[Explanation of symbols]

 5 Calender Roll 10 Sheet 14-17 Roll 18, 19 Belt 20, 21 Cooling Belt 22 Sheet Cooling Device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shogo Umezawa, Innovator, Ichikawashima Harima Heavy Industries Co., Ltd., 1st place, Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture 1 Haramachi Ishi Kawashima Harima Heavy Industries, Ltd.

Claims (2)

[Claims] 1. A pair of cooling belts formed by wrapping an endless belt between a pair of rolls, the pair of cooling belts being in contact with the calender outlet side, and the opposing surfaces of the belt being in contact with both sides of the sheet. A sheet cooling device for a calendar, wherein the sheet cooling device is arranged in such a manner as to perform a cooling operation. 2. The calender sheet cooling device according to claim 1, wherein a final calender roll is shared as an upstream roll constituting one of the cooling belts.