JP3796546B2 - Wiping liquid circulation device for intaglio printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wiping liquid circulating apparatus for an intaglio printing press.
[0002]
[Prior art]
Conventionally, when performing wiping work of a plate cylinder in an intaglio printing machine, a method of using a single wiping liquid tank storing a certain amount (approximately 150 liters) of wiping liquid is generally used. However, this conventional method using a single wiping liquid tank has the following problems. (1) Since the wiping liquid is stained with ink as time passes, the desired performance (detergency) cannot be maintained gradually. Therefore, it is necessary to replace the wiping liquid once or twice a day. (2) The used wiping liquid (wiping waste liquid) becomes industrial waste, and its treatment is expensive. Therefore, as described in (1) above, the wiping liquid is once or twice a day. If it is replaced, the wiping waste liquid treatment cost becomes large. (3) When replacing the wiping liquid, it is necessary to clean the inside of the wiping liquid tank with tap water, etc., but at this time, the ink sludge accumulated in the wiping liquid tank has poor fluidity. Discharging is extremely difficult and workability is poor. (4) During printing, as the ink wiped off by the wiping roller is mixed into the wiping liquid, the liquid level in the wiping liquid tank gradually rises. It is necessary to perform an operation (such as opening / closing the liquid discharge valve) for maintaining the pressure constant. (5) When replacing the wiping liquid, it is necessary to manually perform various valve opening / closing operations.
[0003]
[Problems to be solved by the invention]
In order to solve the above-mentioned problem, the present invention newly provides the second tank in addition to the existing wiping liquid tank, connects both tanks with a pump or the like, and circulates the wiping liquid stored in both tanks. However, it is designed to be able to perform printing, and its purpose is to efficiently and long-term use of a certain amount of wiping liquid, thereby reducing wiping liquid usage cost and waste liquid treatment cost, Furthermore, the load of a series of operations such as a wiping liquid tank cleaning operation, a liquid level control operation, and a wiping liquid replacement operation is reduced.
[0004]
[Means for Solving the Problems]
A wiping liquid tank (1) serving as a first tank and a second tank (2) also serving as a wiping liquid tank are connected to a wiping liquid transfer pipe (6) equipped with a pump (4) with a transmission and a motor valve (9). ) And a Mono pump (5) and a wiping liquid transfer pipe (7) equipped with a motor valve (9), and a partition wall (14) provided inside the second tank (2), and the second tank The filter tank (3) equipped with the filter (15) adjacent to (2) is connected by the wiping liquid transfer pipe (16), and the filter tank (3) and the wiping liquid tank (1) are further connected to the wiping liquid transfer pipe. (8), and a pipe (10) for replenishing new wiping liquid is provided in the upper part of the second tank (2), and this pipe (10) includes an electromagnetic valve (11), and An electric vibrator (13) is provided in the second tank (2), and an ultrasonic liquid level level sensor is connected to the communication pipe (26) provided in the wiping liquid tank (1). The wiping liquid circulation device (A) is provided with a sensor (12).
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In this invention, the wiping liquid is circulated between the wiping liquid tank and the second tank during printing, thereby efficiently removing the ink sludge in the wiping liquid tank to the second tank. Since the wiping liquid is separated into an ink sludge and a supernatant liquid, and the supernatant liquid is returned to the wiping liquid tank, the progress of the wiping liquid stain in the wiping liquid tank is delayed, and the performance (cleaning power) of the wiping liquid is reduced. It exhibits an action (function) that is stably held for a long period of time. In addition, the separation of the ink sludge and the supernatant liquid utilizes the fact that the specific gravity of the ink sludge is larger than that of the wiping liquid, and this phenomenon occurs naturally in the wiping liquid. In order to make use of the phenomenon, a partition is provided inside the second tank to give a function of suppressing turbidity of the ink sludge. In addition, in order to control the liquid level of the wiping liquid, conventionally, an electrode bar sensor has been introduced into the liquid to detect the liquid level. In the present invention, a communication pipe is provided in the wiping liquid tank, and an ultrasonic level sensor is used to detect the wiping liquid in a non-contact manner. Use this method to control the number of pump revolutions. As a result, the function of keeping the liquid level extremely stable and constant can be exhibited. That is, since the transfer path from the wiping liquid tank to the second tank is a two-way path, and a MONO pump suitable for transferring high-viscosity substances is used on one side, the function of efficiently transferring the ink sludge can be exhibited. . And since the 2nd tank bottom part was set as the structure with a moderate angle, and also the electric vibrator was mounted | worn, the function which discharges the sludge of the ink deposited on the 2nd tank bottom part very easily can be exhibited.
[0006]
【Example】
FIG. 1 shows a wiping liquid circulation device (A) according to the present invention, which has a wiping liquid tank (1) as a first tank and a second tank (2) as a pump with a transmission (4) and a motor valve. The wiping liquid transfer pipe (6) provided with (9), the mono pump (5), and the wiping liquid transfer pipe (7) provided with a motor valve (9) are connected to each other and inside the second tank (2). The partition wall (14) provided and the filtration tank (3) equipped with the filter (15) adjacent to the second tank (2) are connected by the wiping liquid transfer pipe (16), and further connected to the filtration tank (3). The liquid tank (1) is connected by a wiping liquid transfer pipe (8). In addition, a pipe (10) for replenishing new wiping liquid is provided at the upper part of the second tank (2), and this pipe (10) is equipped with an electromagnetic valve (11), and in the second tank (2). Is equipped with an electric vibrator (13), a pipe (17) for draining waste liquid, a pump (18), a motor valve (25) that can be opened only when draining the waste liquid, and a communication pipe to the wiping liquid tank (1) (26) includes an ultrasonic liquid level sensor (12). The entire mechanism is controlled using a general electric control device (not shown). Note that (19) is a wiping liquid tank (1) piping for draining the waste liquid, (20) is a manual valve, (21) is a pump, (22) is a wiping liquid in the wiping liquid tank (1) A roller (23) is a wiping roller cleaning device.
[0007]
To operate this, store a certain amount (about 350 liters) of wiping liquid (24) in the wiping liquid tank (1) and the second tank (2), and use a general electric control device (not shown). The pump with transmission (4), the MONO pump (5), and the motor valve (9) are operated to wipe the wiping liquid (24) stored in the wiping liquid tank (1) into the wiping liquid transfer pipe (6) and wiping liquid transfer pipe. (7) is transferred to the second tank (2), and this operation causes the wiping liquid (24) inside the partition wall (14) in the second tank (2) to overflow, and the wiping liquid transfer pipe (16) Then, it is led to a filtration tank (3) equipped with a filter (15), and returned to the wiping liquid tank (1) through a wiping liquid transfer pipe (8) having an appropriate inclination. In order to manage the liquid level of the wiping liquid (24) at this time, the liquid level of the wiping liquid (24) in the wiping liquid tank (1) is detected by the ultrasonic liquid level sensor (12), Based on this signal, a general electric control device (not shown) is used to control the number of revolutions of the pump with transmission (4) and the Mono pump (5) by inverter, thereby wiping liquid tank (1). The liquid level of the wiping liquid (24) is kept constant.
[0008]
Next, the operation of replacing the wiping liquid (24) during printing will be described. For example, it uses a count signal for the number of printed sheets of an intaglio printing press to close the motor valve (9) and shift the speed. Stop the circulation of the wiping liquid (24) by stopping the rotation of the pump with the machine (4) and the Mono pump (5), and secure the printing state by the wiping liquid tank (1) alone, then the lower part of the second tank (2) Open the motor valve (25) installed in the pump, operate the pump (18) to discharge the wiping liquid (24), and then open the electromagnetic valve (11) to supply new wiping liquid from a wiping liquid service tank (not shown). To replenish. In addition, when discharging the wiping liquid, the bottom of the second tank (2) has an appropriate angle, and the electric vibrator (13) is activated against the sludge of the ink deposited on the bottom of the second tank (2). It gives vibration and makes it very easy to discharge the ink sludge. Next, the operation for stopping the intaglio printing press at the time of closing and cleaning the inside of the wiping liquid tank (1) will be described. Then, the entire amount is transferred to the second tank (2), the inside of the wiping liquid tank (1) is cleaned, and returned to the original state after the cleaning work is completed. The series of operations described above is performed using a general electric control device (not shown). However, this is a mechanism that can be switched automatically and manually so that it can cope with any work state.
[0009]
【The invention's effect】
According to the present invention, the efficient use of the wiping liquid can be achieved, and the labor for replacing the wiping liquid and other related work can be reduced. Specifically, (1) the wiping liquid can be efficiently used. As a result, the amount of wiping liquid used is reduced, and the wiping liquid usage cost associated therewith can be reduced. (2) Wiping waste liquid is reduced by the matters described in (1) above, and the waste liquid treatment cost can be reduced accordingly. (3) Wiping waste liquid becomes industrial waste, but it can contribute to environmental protection by reducing it. (4) Contributes to labor saving in the wiping department of intaglio printing presses. (5) Since the wiping liquid can be used for a long time, it contributes to the improvement of the operating efficiency of the intaglio printing press. There are various effects such as.
[Brief description of the drawings]
FIG. 1 is a diagram showing a wiping liquid circulating apparatus of an intaglio printing press according to the present invention.
[Explanation of symbols]
(1) Wiping liquid tank
(2) Second tank
(3) Filtration tank
(4) Pump with transmission
(5) Mono pump
(6), (7), (8), (16) Wiping fluid transfer piping
(9) Motor valve
(10) Piping for replenishing new wiping fluid
(11) Solenoid valve
(12) Ultrasonic liquid level sensor
(13) Electric vibrator
(14) Bulkhead
(15) Filter
(17), (19) Piping for discharging waste liquid
(18), (21) Pump
(20) Manual valve
(22) Wiping roller
(23) Wiping roller cleaning device
(24) Wiping liquid
(25) Motor valve
(26) Communication pipe

Claims (1)

A wiping liquid tank (hereinafter referred to as “first tank”) (1) serving as a first tank includes a wiping roller (22) and a wiping roller cleaning device (23) for cleaning the wiping roller (22). In order to keep the liquid level of the wiping liquid in the first tank (1) constant, the ultrasonic liquid level sensor (12) provided in the communication pipe (26) and the waste liquid in the first tank (1) A waste liquid pipe (19), a manual valve (20) and a pump (21) for discharging
A wiping liquid tank (hereinafter referred to as “second tank”) (2) serving as a second tank has a partition wall (14) for suppressing turbidity of the wiping liquid and ink inside the second tank (2). ), An electric vibrator (13) that vibrates to discharge the sludge of ink deposited on the bottom of the second tank (2), and a waste liquid pipe (17) for discharging the waste liquid of the second tank (2). ), Motor valve (25) and pump (18),
Furthermore, a pipe (10) provided with an electromagnetic valve (11) is provided at the upper part of the second tank (2) in order to supply a new wiping liquid.
The filtration tank (3) includes a filter (15) for filtering the wiping liquid introduced from the second tank (2),
The first tank (1) and the second tank (2) are a pump with a transmission for transferring the wiping liquid in which the ink slag of the first tank (1) is mixed to the second tank (2). (4) and a wiping liquid transfer pipe (6) provided with a motor valve (9) and a wiping liquid transfer pipe (7) provided with a Mono pump (5) and a motor valve (9),
The second tank (2) and the filtration tank (3) are provided with a motor valve (2) for guiding the supernatant wiping liquid onto the filter (15) provided in the filtration tank (3). 9) connected by a transfer pipe (16) with
The filtration tank (3) and the first tank (1) are connected by a wiping liquid transfer pipe (8) to guide the wiping liquid filtered by the filtration tank (3) to the first tank (1). And
The number of revolutions of the pump with transmission (4) and the Mono pump (5) is controlled by an inverter according to the detection signal of the ultrasonic liquid level sensor (12), and the wiping liquid in the first tank (1) is controlled. A wiping liquid circulating apparatus for circulating a wiping liquid while maintaining a liquid level constant.

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