JPS62279865A - Double-surface coating apparatus - Google Patents

Abstract

PURPOSE:To reduce an installation space and to make maintenance easy and safe, by providing a sheet reversal device between the first dryer and second coater of a double-surface coating apparatus. CONSTITUTION:At first, the single surface of a sheet 1 is coated with paint by a No.1 coater and dried by a No.1 dryer 5 while the other surface of the sheet 1 is coated with the paint by a No.2 coater 3 to be dried by a No.2 dryer 9. Herein, a turn bar type reversal device 6 and a tab end position controller 17 are provided between both dryers 5, 9 through a No.1 tension controller 16 and a No.2 tension controller 20, and the sheet 1 of which the single surface is coated and dried is reversed in its sheet surfaces by the reversal apparatus 6 and introduced into the No.2 coater 3 while the sheet tab part thereof is regulated so as to be always set at a constant position.

Description

[Detailed description of the invention] 3. Detailed description of the invention (Industrial application field) The present invention relates to improvements in double-sided coating equipment.

(Prior Art) Various double-sided coating devices are often used when coating both sides of a sheet such as paper or film with a coating material.

In these coating devices, as shown in FIG. 2, a sheet (11 is coated with paint on one side by a ml coater (2)) which is rewound from the winding (8) of an unwinder (7), and then It is dried with the first dryer (5), then the paint is applied to the other side with the second coater (3), dried with the second dryer (9), and wound with the winder α0).
It consists of a continuous process of winding into υ.

Therefore, in conventional double-sided coating equipment, the unwinder, both coaters, and the winder are usually installed on the floor to facilitate installation and removal of the winder and maintenance. Furthermore, while the coated surface is in an undried state, it is necessary to guide the coated surface so that it does not come into contact with the guide roll or the dryer surface, resulting in the following problems. That is, in conventional double-sided coating equipment, for example, as shown in Fig. 2, there is a place where the sheet is detoured below the floor surface, or there is a place where the sheet is sent after being dried in a dryer by a sheet bus that passes through the dryer. can be created.

Therefore, even if we try to make the entire device as compact as possible, there is a limit, and the building that houses the device will also have to be large. Moreover, since the seat path is located under the floor or above the dryer, it places a heavy burden on workers during maintenance.

(Problems to be Solved by the Invention) The present invention provides a double-sided continuous coating device that requires a minimum amount of space and does not place a large burden on workers during maintenance.

(Means to solve the problem) ""> - (After applying paint on one side of 11 with Kan 1 coater (2) and letting it dry, apply paint on the other side with Kan 2 coater (3) and drying both sides. This double-sided coating device is characterized in that the coating device (4) is provided with a sheet reversing device (6) between the first dryer (5) and the second coater.

(Function) The double-sided coating device (4) of the present invention will be explained in more detail with reference to FIG. 1, which shows an embodiment in the case of a blade coater.

FIG. 1 shows an enlarged view of the space between the 1lhl dryer and the 2nd dryer, but unlike the conventional example shown in FIG. 2, the sheet runs from left to right inside the 1st air dryer. The sheet (1), which has been coated with paint on one side and dried, passes through each guide roll and reaches a tension adjustment device αQ consisting of a ml tension detection roll G (l) and a 1lhl tension adjustment roll a9.

This tension adjustment device electrically detects the tension applied to the sheet during operation as a change in the position of the dancer roll (tension detection roll), and adjusts the tension so that it is always equal to the set value.
This is a device that increases or decreases the rotation of the tension adjustment wheel, and is used to absorb, for example, fluctuations in tension that occur in the sheet during drying between the air dryer (5) and the reversing device (6).

After passing through the tension adjusting device, the sheet surface is then reversed by a turn bar type reversing device (6) which is the main part of the present invention. Although this reversing device requires less digging space, it has a strong tendency to increase the meandering phenomenon of the sheet that tends to occur during coating and drying. If you apply paint to the 11h2 brake with the coater (3) while the sheet is meandering, more paint will be applied to the 11h2 brake than necessary when removing both sides of the sheet, which are the uncoated parts, using a thrifter device or sheet cuffer device in the subsequent process. The ears will have to be removed.

Therefore, it is preferable to provide an edge position adjusting device αη as shown in FIG. 1 to adjust the edge of the sheet so that it is always at a constant position before entering the two-blade coater. This device uses a detector fixed near the exit side of the guide roll (2) to detect the edge position of the sheet using an air flux method or a photoelectric method, and moves the guide roll left and right based on the detection signal to constantly detect the edge of the sheet. The structure is such that the parts can be adjusted to a constant position.

Furthermore, between the edge position adjustment device and the 2-blade coater, a t2 tension detection roll OI of the same adjustment method as the lkl tension adjustment device and a tension adjustment device (at least one set of 2φ) consisting of 2 tension steel knot rolls are arranged. If this is done, tension fluctuations that occur during this time will be absorbed, and sheet breakage that may occur with a two-blade coater can be prevented.

The sheet coated on the other side with the 2-blade coater is introduced into the 2-blade air dryer (9).

(Effects) With the double-sided coating device equipped with the reversing device according to the present invention, there is no need to detour the sheet under the floor surface or send it over the floor 1 dryer, and it is not necessary to send the sheet over the floor 1 dryer. There is no need to overlap them. Therefore, it can be installed in a small space and can be maintained very safely and easily by workers.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram when the reversing device according to the present invention is applied to a blade type double-sided coating device. Further, FIG. 2 is a configuration diagram of a conventional double-sided coating apparatus. (l): Sheet (2) - 1 coater (3)
: 2nd coater (4) - Double-sided coating device (5): 1st
Dryer (6) - Sheet reversing device (7): Unwinding (81: (unwinder) winding (9): Obstacle 2 Dryer 00): Waining goo αυ:
(Winder) Winding Oz double guide roll a3 double floor 0ω: Nil 1 Tension detection roll (dancer roll)
09: Magnetic 1 tension adjustment roll ae: 1 tension adjustment device On: Ear end position adjustment device 0ω: 1Ik12 tension detection roll αΦ: 2 tension adjustment roll (A): 2 tension adjustment device Patent applicant Kanzaki Paper Co., Ltd. 2nd drawing

Claims (1)

[Claims] No. on one side of sheet (1). After applying the paint with No. 1 coater (2) and drying it, coat No. 1 on the other side. In the double-sided coating device (4) that applies and dries the paint with two coaters (3), the No.
．． 1 dryer (5) and no. A double-sided coating device characterized in that a sheet reversing device (6) is provided between two coaters.