JP3399155B2 - Automatic application liquid replenishment system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a coating liquid prepared by adjusting various adhesives such as an adhesive for dry lamination applied to a film in a film dry laminating process and a resin liquid. The present invention relates to a system for automatically replenishing a coating solution for automatically replenishing a predetermined replenishment tank.

[0002]

2. Description of the Related Art Generally, in special printing for printing on a synthetic resin film or the like, two or more synthetic resin films or various sheets (paper, aluminum foil, etc.) are superposed and applied in advance as a substrate. A laminated film is used in which an adhesive is fused while being heated by a dry laminating method through a dried dry adhesive to bond the adhesive.

Conventionally, in the dry laminating method, an adjusted adhesive for liquid type dry laminating in which a main component, a curing agent, a solvent and the like are prepared in advance at a certain compounding ratio is used, and this adhesive is used in a coating process. ,
Roll coating method, gravure coating method,
The film is applied to a film to be bonded and dried by a coating device such as a knife coating system, and is then laminated with another film, and the adhesive on the inner surface of the layer is melted and laminated by heating.

In the conventional adhesive coating process, as shown in FIG. 3, first, the adjusted adhesive 13 is stored in advance in a main tank T ₁ installed in the vicinity of the coating apparatus. Be prepared.

The adhesive 13 contained in the main tank T ₁ is forcibly forced by the feed pump 1 into the pipes a, b.
Is supplied to the sub tank T ₂ provided in the vicinity of the coating unit 10 of the coating device for actually coating the film, and is replenished by the intermittent replenishment method or the circulation replenishment method.

The adhesive 13 contained in the sub tank T ₂ is forcibly forced by the feed pump 2 into the pipes c and d.
And the coating unit 10 of the coating apparatus is sent.
(For example, a coating roll 11 which actually rotates, the pressing roll 12, from the coating liquid supply tank T ₃ which accommodates the adhesive 13 configured) to a coating solution supply tank T ₃ of, the intermittent supply method or circulation supply system Will be replenished.

In the coating operation, the film f
Is introduced between the rotating coating roll 11 and the pressing roll 12, and the adhesive 13 attached to the coating roll 11 immersed in the adhesive 13 accommodated in the supply tank T ₃ is applied to the film f. . When the adhesive 13 in the sub tank T ₂ and the supply tank T ₃ is sequentially consumed by such a coating operation, the remaining amount of the adhesive in the sub tank T ₂ and the supply tank T ₃ can be confirmed manually (visually). ON or OFF of the pump 1 by the switch mechanism 9 which is detected by the level sensor S (liquid level gauge) installed in the sub tank T ₂ and the supply tank T ₃ and operates based on the detection signal.
The operation is performed and a predetermined amount of the adhesive 13 is replenished.

[0008]

The above level sensor S
Although the automatic detection method of the remaining amount using is convenient because it saves the time and effort of the visual confirmation, the adhesive 1
3 has adhered, and the adhered adhesive 13 has solidified around the sensor, which shortens the service life, and maintenance and repair / adjustment of the sensor S are always necessary.

An object of the present invention is to automatically supply a predetermined amount of coating liquid without using a level sensor (liquid level gauge) when replenishing the adjusted coating liquid such as adhesive from the main tank to the sub tank. Is to be able to supply.

[0010]

According to the present invention, a sub tank T ₂ containing a coating liquid fed from a main tank T ₁ by a pump 1 and an amount of the coating liquid contained in the sub tank T ₂ are measured. A weighing scale 3, a control unit 4 for controlling ON / OFF operation of the pump 1 based on a detection signal from the weighing scale 3 , and a control unit 4 for controlling the ON operation of the pump 1.
The timer 22 to start and the set weight W _n is detected.
And a weight detection signal transmitted from the weighing scale 3 when
Is the timer 22 transmitting when the set time t has elapsed
Switch 2 which operates by both the time elapsed signal and other signals
3 and coating application installed in the coating device
A length meter 3 for measuring the length of the film f in the unit section 10
1 , the lower limit of the weight W measured by the weight scale 3 is W _d , and the upper limit thereof is W _U , and when W ≦ W _d , the pump 1
Is turned on, and when W ≧ W _U , the pump 1 is turned off to automatically replenish the coating liquid from the main tank T ₁ to the sub-tank T ₂ , and the closing signal from the switch 23 is used to detect the alarm.
The alarm activation signal is generated and
The coating liquid automatic supply system is characterized in that the length measurement by the length meter 31 is started .

[0011]

Further, in the present invention, in the automatic replenishing system of the coating liquid of the above-mentioned invention, the control unit 4 is provided with the O of the pump 1.
A counter 25 that shifts the count number every N operations is provided, where N is the count number and L is the amount of one-time replenishment of the coating liquid by the pump 1, and N × L (or N × L-L ₁ , L
₁ ; Automatic coating liquid replenishing system having a function of calculating the usage amount of the coating liquid by calculating the amount of the coating liquid in the sub tank T ₂ ) by the control unit 4.

The present invention also provides an automatic coating solution of the above invention.
Installed on the coating device in the replenishment system
Supply tank T of coating unit 10₃The subtan
Ku T ₂Of the coating liquid which is replenished by the pump 2 from the
It is an automatic supply system.

[0014]

[0015]

EXAMPLES The automatic replenishing system for coating liquid of the present invention will be described in detail below with reference to examples.

FIG. 1 was prepared for dry lamination.
Apply the adhesive as a coating liquid using a coating device.
2 is a schematic block diagram of the system of the present invention in the case of
Each compounding substance that makes up the adhesive, such as adhesives, curing agents, and solvents
At a prescribed concentration (viscosity) at a prescribed blending ratio.
Main tank containing the prepared adhesive 13 (application liquid)
T ₁And the main tank T₁Adhesive 13 is replenished from
Sub tank T₂And the sub-tank T₂Housed in
And a weight scale 3 for measuring the weight W of the adhesive 13
Signal processing for processing control of the weight measurement signal output from 3
Control unit 4 (personal computer) and sub tank
T₂From the coating liquid supply tank T to which the adhesive 13 is replenished from₃Equipped
Get

A pipe a and a pipe b for replenishing the adhesive 13 are provided between the main tank T ₁ and the sub tank T _2, and the adhesive 13 is fed between the two pipes a and b. There is provided a pump 1 for.

The sub tank T ₂ and the coating liquid supply tank T
₃ , a pipe c and a pipe d for supplying the adhesive 13 are provided, and a pump 2 for feeding the adhesive 13 is provided between the pipes c and d. Between the sub tank T ₂ and the coating liquid supply tank T ₃ , the supply tank T is provided.
Adhesive 13 that overflows from ₃ is subtank T
₂ is provided with a recovery pipe e (or a pipe forcibly recovered via a pump) that recovers by gravity (difference in height).

The pump 2 is always operated from the sub tank T ₂ to the coating liquid supply tank T during the operation of the coating apparatus.
_The feeding operation (driving rotation) is continuously performed to feed the adhesive 13 to the adhesive _3, and the adhesive 13 circulates in the pipes c, d, and e between the sub tank T ₂ and the supply tank T _3. It is being sent.

The present system described above is provided near the coating unit 10 of the coating apparatus.

The coating unit 10 includes the supply tank T ₃ and
It is composed of a coating roll 11 which is dipped in the adhesive 13 replenished in the tank T ₃ and driven to rotate, and a pressing roll 12 which is provided on the upper side so as to face it and rotates in conjunction therewith.

The application of the adhesive 13 to the film f by the application unit 10 will be described below.

The film f is introduced between the coating roll 11 and the press roll 12, and the adhesive 13 attached to the peripheral surface of the film f is applied to the lower surface of the film f by the coating roll 11, and then the adhesive is applied. If necessary, the film f is introduced into a dryer (not shown) such as a heater or a blower to dry the adhesive. The applied film is then appropriately wound into a roll, or is laminated with another film while being heated to melt the adhesive by a subsequent dry laminating step.

The weighing scale 3 integrally attached to and installed on the lower portion or the side portion of the sub-tank T ₂ has a central processing unit equipped with a programmable controller, a microprocessor, a sequencer, etc. by an electric signal system signal cable 5. Signal processing controller 4 including 20 (CPU)
(For example, a personal computer), the pump 1 is connected to a signal processing control unit 4 (for example, a personal computer) by a signal cable 6 of an electric signal system.

Further, the control unit 4 includes a timer 22 which starts a timing operation by a coating liquid replenishment start instruction signal, a switch 23 (normally open contact) which is closed and closed after a preset elapsed time t of the timer 22. A closing signal by the switch 23 and a certain set weight W _n (alarm operation set weight; W ₁ ≤W
_An alarm device 24 is provided for issuing an alarm when both of the weight measurement signals for _n ≦ W ₂ ) are generated.

Reference numeral 35 is a keyboard for input (for command operation instruction, for setting input of weight, time, etc.), and 36
Is a memory unit, for example, a recording medium such as a floppy disk, a magneto-optical disk, a compact disk, and a disk drive device, 37 is a CRT display for output display, 38 is a printer for sheet output of input data and arithmetic processing data. , Respectively connected to the CPU 20.

Next, the operation of the system of the present invention will be described in detail below.

The control unit 4 always obtains from the weighing scale 3 the amount of the coating liquid (eg, adhesive) contained in the sub tank T ₂ as a weight data signal.

The following items are preset in the control unit 4. Alarm operation setting at the elapsed time t and the weighing of the timer 22 to start time counting operation by the weight limit W ₂ coating liquid supply start instruction signal of the coating liquid coating solution weight lower limit W ₁ subtank T ₂ of the in the sub-tank T ₂ Weight W _n (W ₁ ≤ W _n ≤ W ₂ )

By setting the lower limit value W ₁ of the coating liquid in the sub-tank T ₂ as described above, when the weight of the coating liquid falls below this lower limit value, a signal to start replenishing the coating liquid is sent to the control section 4. Is output to the drive system of the pump 1 via the signal cable 6 to start the pump 1, and the main tank T
_The coating liquid is replenished from ₁ to the sub tank T ₂ .

Further, by setting the upper limit value W ₂ of the weight of the coating liquid in the sub tank T ₂ as described above, when the weight of the coating liquid exceeds the upper limit value, the stop signal for instructing replenishment of the coating liquid is The signal is output from the control unit 4 to the drive system of the pump 1 via the signal cable 6 to stop the pump 1 and stop the supply of the coating liquid from the main tank T ₁ to the sub tank T ₂ .

Further, as described above, the elapsed time t of the timer 22 which starts the timing operation by the coating liquid replenishment start instruction signal
By setting the alarm operation set weight W _n in weight measurement and the set weight W _n after the application liquid replenishment start instruction signal is output, a certain set weight W _n is not reached after a certain set elapsed time t. An alarm device 24 such as a buzzer sound or a lamp is activated and an alarm is issued by using both the closing signal after the set elapsed time t by the switch 23 and the weight measurement signal of the set weight W _n as alarm activation signals. . The activation signal of the alarm device 24 may be used as a stop signal of the production machine such as the coating apparatus main body.

The automatic replenishing system of the coating liquid of the present invention is, for example, the coating unit 10 of the coating apparatus.
(See FIG. 1) The length meter 31 which rotates while contacting the front and back surfaces of the film f introduced therein and measuring the number of rotations
The length meter 31 is connected to the signal processing control unit 4 by the signal cable 7, and the length measurement by the length meter 31 is started by using the alarm activation signal generated by the switch 23 as a measurement start signal. Then, the length of the film f introduced is measured.

Thus, the length of the coated film f is confirmed from the time when the alarm is issued to the time when the coating apparatus main body is stopped (the introduction of the film f is stopped).

Further, the above-mentioned automatic supply system of the present invention is
The lower limit value W ₁ is provided with a counter 25 for counting the number of replenishment N output from the control unit 4 via the signal cable 6 to the replenishment start instruction signal of the coating liquid (eg, adhesive) to the drive system of the pump _1. To the upper limit value W _{2, the} amount of replenishment L of the coating liquid to be replenished at one time (volume such as liter) is set in advance, and the amount of the coating liquid used by N × L or the amount of the coating liquid used for each predetermined item is set. You may manage. In addition,
Sub tank T ₂ at the end of the coating operation of the coating liquid
If the remaining amount of the coating liquid remaining inside is L ₁ , then N × L−L ₁
Is the actual amount of coating liquid used.

In addition to managing the usage amount of the coating liquid for each of the above-mentioned predetermined items, for example, the usage amount of the coating liquid may be managed on a daily, weekly, or monthly basis.

The amount of the coating liquid used N × L (or the substantial amount used; N × L-L ₁ ) is compounded with each compound substance constituting the coating liquid (adhesive) such as a main agent, a curing agent and a solvent. By multiplying by the ratio, the amount of each compounded substance used can be obtained.

In the above-mentioned automatic supply system of the coating liquid of the present invention, as shown in the functional blocks of FIG.
1, defective coating film length confirmation means 42 for confirming the length of the film estimated to have caused defective coating, and coating liquid (adhesive) usage amount grasping means 43. Become.

The automatic supply status determining means 41 is composed of the timer 22 shown in FIG. 1 and a switch 23 for issuing an alarm activation signal.

The defective coating film length confirmation means 42 includes the signal processing control section 4 shown in FIG.
It is composed of a switch 23 that issues an alarm activation signal and a length meter 31.

Further, the adhesive usage amount grasping means 43 is
A counter 25 that counts the number N of replenishments and N × L
(Or N × L−L ₁ ) and a calculation unit (control unit 4).

[0042]

The function of the coating liquid automatic replenishing system of the present invention is
Tank T₁And the main tank T₁From pump 1
Sub tank T for containing the coating liquid to be fed₂And the sub
Tank T₂Weighing scale 3 for measuring the amount of coating liquid stored inside
And the pump 1 based on the detection signal from the weighing scale 3.
It is equipped with a control unit 4 that controls the ON / OFF operation of the
The weight W measured by is W ≦ W_d(Lower limit of weight)
Sometimes pump 1 is turned on and W ≧ W_U(Weight upper limit)
Sometimes the pump 1 is turned off and the main tank T₁From
Sub tank T₂To automatically replenish the coating liquid
An automatic replenishment system, the main tank T₁(Or adhesive
Blender for blending coating liquids such as agents at appropriate blending ratios
-) From sub tank T₂Start and end of replenishment of coating liquid to
Timing control of the sub tank T₂The weight of
Sensor is installed at a fixed position in the tank.
A conventional liquid level sensor that is installed and controlled by fixed point measurement
The position of the liquid surface in the tank is
However, the amount of liquid in the tank can be measured in real time,
Do not install multiple sensors in the tank or change the capacity.
Do not move or adjust the sensor position for any reason.
Sub tank T ₂Accurately stores the amount of coating liquid inside
Fine control of processing is possible.

Further, unlike the conventional liquid level sensor, it is not necessary to mount the sensor inside the tank, so that it is not in contact with the coating liquid such as an adhesive and the adverse effects such as stains due to the coating liquid are reduced. In addition, the service life of measurement can be extended, and maintenance of the measurement part and its surroundings can be reduced.

Further, a signal processing control unit 4 is provided, and the weight scale 3
The alarm activation signal is formed by the measurement signal of the alarm operation set weight in the replenishment of the coating liquid by the signal and the signal issued after the elapse of the set time of the timer 22, so that the occurrence of the operation trouble in the automatic replenishment operation by the feed pump, It can be handled safely by sounding an alarm or stopping the machine such as the coating device body.

Further, by providing the signal processing control unit 4 and providing the length meter for starting the measurement by the alarm activation signal in the introduction section of the film f, after the occurrence of the operation trouble in the automatic replenishment operation by the feed pump, It is possible to measure the length of the coated film f before the machine such as the coating device main body is stopped, and based on the measured length, coating defective products and non-defective products caused by trouble are coated. It is possible to sort accurately after the operation.

[0046]

The automatic replenishing system of the coating liquid of the present invention is
To replenish the coating liquid from the main tank to the sub tank,
It can be performed accurately and automatically by the control system based on weight measurement. For example, problems that may occur in automatic replenishment of the coating liquid, such as sudden stoppage or failure of the feed pump, or clogging of the coating liquid in the feed pipe. against, immediately can be addressed by such an alarm and machine stop Rutotomoni, tiger
Correct the defective coatings and non-defective products caused by the
Can be sorted accurately. Therefore , it is possible to apply a coating device for coating liquids such as adhesives and other resin liquids and gravure printing ink, or to unmanner the operation of replenishing the coating liquid in a gravure printing device, save labor in operating the device itself, and improve the operating efficiency of the device. It has a remarkable effect.

[Brief description of drawings]

FIG. 1 is a schematic block diagram illustrating an embodiment of an automatic supply system of a coating liquid of the present invention.

FIG. 2 is a functional block diagram showing each function of the coating liquid automatic replenishing system of the present invention.

FIG. 3 is a schematic block diagram of a conventional automatic replenishment system for coating liquid.

[Explanation of symbols]

1 ... Pump 2 ... Pump 3 ... Scale 4 ... Control unit
5, 6, 7 ... Signal cable 9 ... Switch mechanism 10 ... Coating unit 11 ... Coating roll 12 ... Pressing roll 13 ... Coating liquid 20 ... CPU 22 ... Timer 23 ... Switch 24
... Alarm device 25 ... Counter 31 ... Length meter 35 ... Keyboard 36 ... Memory 37
... CRT display 38 ... Printer 41 ... Automatic supply status determination means 42 ... Coating defective film length confirmation means 43 ... Coating liquid (adhesive) usage amount grasping means

Claims (3)

(57) [Claims] 1. A sub-tank T ₂ containing a coating liquid fed from a main tank T ₁ by a pump 1, and a weight scale 3 for measuring the amount of the coating liquid contained in the sub-tank T ₂ .
The pump 1 is turned on based on the detection signal from the weighing scale 3.
The control unit 4 that controls the N / OFF operation , and the control unit 4 includes
A timer 22 started by the ON operation of the pump 1.
When a certain set weight W _n is detected,
When the transmitted weight detection signal and a certain set time t have elapsed
And the time elapsed signal from the timer 22 which is transmitted to
And a switch 23 that operates according to a signal.
Fill the coating unit 10 installed in the coating device.
A length meter 31 for measuring the length of the frame f is provided, and the lower limit of the weight W measured by the weight scale 3 is W _d ,
When the upper limit value is W _U , the pump 1 is turned on when W ≦ W _d , and the pump 1 is turned off when W ≧ W _U to automatically replenish the coating liquid from the main tank T ₁ to the sub tank T _2.
The alarm activation signal is sent by the closing signal from the switch 23.
No. 3 and the alarm activation signal
An automatic replenishing system for coating liquid, which starts the length measurement according to 1 . 2. The control unit 4 is provided with each ON operation of the pump 1.
It is equipped with a counter 25 for shifting the count number,
The number of components is N, and the amount of replenishment of the coating liquid by the pump 1 once is
N × L as L (or N × L-L ₁ , L ₁ ; subtan
The remaining amount of coating liquid in T ₂ ) can be calculated by the control unit 4.
2. A function for calculating the usage amount of the coating liquid is provided by
Automatic replenishment system for the coating liquid described. 3. A coating unit installed in a coating device.
To the supply tank T ₃ of the port section 10 from the sub tank T ₂ .
The coating liquid is replenished by the pump 2.
Automatic replenishment system for the coating liquid described.