JPH03258372A - Method for controlling thickness of applied paste - Google Patents

Abstract

PURPOSE:To make the temp. of paste close to the temp. of each applying roll equal to room temp., to reduce the temp. gradient of the roll in the axial direction and to make the thickness of the paste on the roll uniform in the axial direction by cooling or heating the paste before feeding to a paste applying roll part. CONSTITUTION:Paste in a pipe 1 is cooled or heated before feeding to a paste applying roll part 5 to make the temp. of the paste close to the temp. of applying rolls 5A, 5B equal to room temp. The temp. gradient of each of the rolls 5A, 5B to which the paste is fed in the axial direction is reduced and the thickness of the paste fed to each of the rolls is made uniform in the axial direction. The paste of a uniform thickness can be transferred and stuck to a tape and the occurrence of creases and slip can be avoided in a succeeding stage such as a rewinding or cutting stage.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for controlling the thickness of applied glue to make the thickness of glue supplied to a glue application roll portion uniform in the axial direction.

(Prior art) Generally, in order to transfer glue onto a tape, glue is supplied to two coating rolls arranged parallel to each other, and the glue is passed between the two coating rolls. After the adhesive has been made to a certain thickness, the adhesive is transferred onto the tape.

(Problem to be Solved by the Invention) However, when the temperature of this glue is higher or lower than the temperature of the coating roll, when this glue is supplied to the coating roll, both ends of the coating roll in the axial direction The temperature difference between the coating roll and the axial center becomes large, and the diameter of the center of the coating roll may become larger or smaller than that of both end portions.

For this reason, the thickness of the glue passed between the two coating rolls varies in the axial direction, and the glue is not transferred to the tape with a uniform thickness, but is transferred in a dispersed state. There was a problem that the

For this reason, wrinkles may occur during post-processes such as unwinding and cutting, and
There were problems such as the occurrence of winding misalignment.

An object of the present invention is to solve the above problems.

That is, it is possible to prevent a temperature gradient from occurring in the axial direction of the coating roll to which the glue is supplied, and it is possible to make the thickness of the glue supplied to the coating roll uniform in the axial direction. , it is possible to transfer glue of uniform thickness to the tape,
It is an object of the present invention to provide a method for controlling the thickness of coated glue that can avoid the occurrence of wrinkles and the occurrence of slippage in winding during post-processes such as unwinding and cutting.

(Means for Solving the Problems) In order to solve the above problems, the present invention cools or heats the glue supplied to the glue coating roll section before supplying it, so that the temperature of the glue is equal to room temperature. By approximating the temperature of the coating roll, the temperature gradient in the axial direction of the coating roll to which this glue is supplied can be reduced, and the thickness of the glue supplied to this coating roll can be made uniform in the axial direction. It was decided to.

(Function) Therefore, the thickness of the glue transferred to the tape becomes uniform, and the occurrence of wrinkles and slippage in the subsequent steps such as unwinding and cutting are avoided.

(Example) Hereinafter, a method for controlling the coating glue thickness according to the present invention will be described based on drawings showing embodiments thereof.

FIG. 1 is a schematic diagram showing a first embodiment of the method for controlling the thickness of coated paste according to the present invention.

Reference numeral 1 denotes a tube for feeding glue, and this tube 1 is connected to a tank 2.

The tank 2 is piped to a mixer 4 via a pump 3.

The glue mixed by the mixer 4 is supplied to a glue coating roll section 5 consisting of two coating rolls 5A and 5B arranged in two rows in the lateral direction.

The pipe 1 is passed through a plurality (four in this embodiment) of cooling water reservoir pipes 6A, 6B, 6C, and 6D.

Reference numeral 7 denotes a cooling water passage pipe, and the amount of cooling water is regulated and sent into each cooling water reservoir pipe 6A, 6B, 6C, 6D by means of electromagnetic valves 8.

These solenoid valves 8 are adjusted to open and close by a cooling water switch panel 9.

This cooling water switch panel 9 includes a temperature detector 10 disposed on the inlet side of the pipe 1, a temperature detector 11 disposed on the tank side of the pipe 1, and a temperature detector 13 disposed on the coating roll 5A. The degree of opening and closing of the electromagnetic valve 8, that is, the flow rate of the cooling water is adjusted by the detection of the glue temperature and the temperature of the coating roll 5A by each temperature detector 10゜11.13. .

Reference numeral 12 denotes a cooling water return pipe, through which the cooling water is returned to a heat exchanger (not shown), and the cooling water returned to the heat exchanger undergoes heat exchange and returns to the cooling water passage pipe. Sent out on 7th.

With this cooling water, the glue inside the tube 1 is removed from each cooling water reservoir tube 6A.
, 6B, 6C, and 6D, and approximate the temperature of the coating rolls 5A, 5B, which is equal to room temperature.

In this example, the glue temperature on the entrance side is coating rolls 5A and 5B.
The case where the temperature is higher than .

If the glue temperature on the entry side is lower than the temperature of the coating rolls 5A, 5B, hot water may be used instead of cooling water.

By doing as described above, the temperature of the glue supplied to the glue coating roll section 5 becomes close to the temperature of the coating rolls 5A and 5B.

This reduces the temperature gradient in the axial direction in the coating rolls 5A, 5B, making it possible to make the thickness of the glue supplied to the coating rolls 5A, 5B uniform in the axial direction.

Therefore, the thickness of the glue transferred to the tape becomes uniform, and the occurrence of wrinkles and slippage in the subsequent steps such as winding and cutting are avoided.

FIG. 2 is a schematic diagram showing a second embodiment of the method for controlling the coating glue thickness according to the present invention.

Reference numeral 20 is a tank containing glue, and this tank 20
A pipe 23 for feeding glue is connected to a mixing tank 22 via a pump 21.

A conduit 26 is connected from the mixing tank 22 to the mixer 24 via a pump 25.

Below this mixer 24 is a coating roll 25A.

A glue coating roll part 25 made of 25B is arranged,
Glue is supplied to this glue coating roll section 25 from a mixer 24.

The mixing tank 22 is provided with a glue amount measuring device 37,
By measuring the amount of glue in the mixing tank 22 using the glue amount measuring device 37, the invert motor 27 is driven, and the insufficient amount of glue is supplied from the tank 20 into the mixing tank 22 via the pump 21. ing.

From the mixing tank 22, a circulation pipe 29 is separately piped into the spiral heat exchanger 30 via a pump 28, so that the paste is returned to the mixing tank 22 again.

Reference numeral 31 denotes a solenoid valve for adjusting the amount of medium fed into the spiral heat exchanger 30. The degree of opening and closing is adjusted based on temperature detection data.

Data on the temperature of the coating roll 25A of the glue coating roll unit 25 is input to the glue temperature controller 32, and the temperature of the glue heat-exchanged by the spiral heat exchanger 30 is determined by the temperature of the coating roll 25A of the glue coating roll section 25.
It has the function of approximating 5A.

Reference numeral 33 denotes a chiller, and a medium is circulated from the chiller 33 to the spiral heat exchanger 30 via a pump 34.

Further, reference numeral 35 is a motor for rotating a blade body 36 that stirs the glue in the mixing tank 22. The blade body 36 is rotated within the mixing tank 22 by the drive of the motor 35, and the glue that is circulated and whose temperature is adjusted by the spiral heat exchanger 30 is mixed with the glue in the mixing tank 22.
The temperature of the entire glue in the mixing tank 22 is made uniform.

In this way, the uniform temperature of the glue in the mixing tank 22 is approximated to the temperature of the coating roll 25A of the glue coating roll section 25, so that the axial temperature gradient in the coating rolls 25A and 25B is reduced. coating rolls 25A, 2.
The thickness of the glue supplied to 5B can be made uniform in the axial direction.

Therefore, the thickness of the glue transferred to the tape becomes uniform, and the occurrence of wrinkles and slippage in the subsequent steps such as winding and cutting are avoided.

The graph shown in FIG. 3 shows the results of the inventors' measurements of the temperature of the glue supplied to the glue coating roll section and the temperature of the coating roll as described above. Temperature is plotted, and time (min) is plotted on the horizontal axis.

The mark indicates the temperature of the glue, and the mark indicates the temperature of the coating roll.

As shown in this graph, it can be seen that as time passes, the temperature of the glue becomes closer to the temperature of the coating roll.

The graph in Figure 4 shows No. 1 in Figure 3, N
It shows the weight or thickness of the glue in the width direction of the tape at time o, 2 and time N013.

The + mark indicates No, time 1, the * mark indicates No, time 2, and the X mark indicates No, time 3, respectively, indicating the weight of the glue in the width direction of the tape.

As is clear from the graphs in Figure 3 and Figure 4 above, when the temperature of the glue approximates the temperature of the coating roll, the glue is transferred most uniformly in the width direction of the tape, and It was proven that the glue thickness was almost uniform.

Next, the effects after introducing the method of this invention are compared with those before introduction, and numerical values are shown in a table.

In the above table, n indicates the number of data or the average thickness in the width direction of the tape, and σn-
1 indicates the degree of dispersion.

As is clear from the above table, it can be seen that the difference in adhesive thickness in the width direction of the tape is smaller and the degree of variation is smaller in the tape in which the method of the present invention is introduced, compared to the tape before introduction.

(Effects of the Invention) As explained above, according to the present invention, it is possible to prevent a temperature gradient from occurring in the axial direction of the coating roll to which glue is supplied. The thickness of the glue can be made uniform in the axial direction, and it is possible to transfer a uniform thickness of glue to the tape, which prevents wrinkles and unrolling during post-processes such as unwinding and cutting. This provides effects such as being able to avoid the occurrence of misalignment.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a first embodiment of the method for controlling coating glue thickness according to the present invention, and FIG. 2 is a schematic diagram showing a second embodiment of the method for controlling coating glue thickness according to the present invention. Figure 3 is a graph showing the results of measuring the temperature of the glue supplied to the glue coating roll section and the temperature of the coating roll.
No. 1 in the diagram, No. 12, N013
2 is a graph showing the weight, or thickness, of glue in the width direction of the tape at the time point. 5.25...Glue coating roll part

Claims (1)

[Claims] 1) A coating roll to which the glue is supplied by cooling or heating the glue supplied to the glue coating roll section before supplying the paste to approximate the temperature of the coating roll which is equal to room temperature. 1. A method for controlling the thickness of a coating paste, characterized by reducing the temperature gradient in the axial direction of the coating roll and making the thickness of the paste supplied to the coating roll uniform in the axial direction.