JPH072921B2 - Liquid supply device for coater - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coating solution preparation and supply device for a coater, which is suitable for supplying to a coater a liquid agent that is likely to deteriorate with the passage of time.

[Conventional technology and technical problems to be solved]

Among liquid agents such as printing inks, cured coatings, and adhesives, there are not a few liquids that change with time such as hardening, volatilization, and oxidation. Therefore, when the liquid agent is actually used in a coater or the like, the liquid agent raw material liquid is prepared immediately before use and the liquid preparation for these purposes is supplied.

However, when the lot size becomes large and the process of using the liquid agent takes a long time, in order to suppress the deterioration of the liquid agent as much as possible, the compounding is performed during the coating work, and the liquid preparation is performed while reducing the storage time of the prepared liquid agent. Need to supply. However, in such preparation, it is necessary to reduce the amount of preparation at one time, and it is impossible to stabilize the amount of the raw material liquid flowing in the pipe connecting the storage tank for the raw material liquid to the preparation tank. A valve that opens and closes in accordance with the flow rate of the liquid must be provided in the middle of the pipe, which causes a drawback that an indeterminate amount of element liquid tends to remain in the pipe between the valve and the mixing tank. For this reason, the amount of element liquid required for the preparation could not be accurately obtained, and automated preparation was difficult to perform. For this reason, in the past, automatic preparation of liquid agents was abandoned, and only manual preparation was performed.

However, when the mixing operation is performed manually, some of the liquid raw material liquids contain volatile substances harmful to the human body, so that the working environment is deteriorated. In addition, since it is necessary to mix the liquid agent while monitoring the usage amount, the work becomes troublesome. In addition, since manual mixing requires a balance, it takes time, and an error occurs in the measurement of the liquid, making it difficult to maintain the uniformity and homogeneity of the liquid preparation. For this reason, for example, there is a difference in the finished state of the product between the product finished by coating with the liquid preparation supplied in the early hours of the liquid agent use process and the finished products in other time zones. There was a problem.

In addition, recently, in order to improve the quality of coating, the number of types of liquid agents to be mixed tends to increase, and the compounding work has become more complicated.

The present invention has been made in view of the above-mentioned drawbacks in the conventional liquid supply operation, and is a fully automated coater capable of handling various liquid agents and capable of accurate preparation. It is a technical subject to provide a liquid supply device for liquid.

[Means adopted for solving the problem]

Means adopted by the inventor for solving the above problems will be described below with reference to the accompanying drawings.

That is, the mixing tank 11 having the mixer 14 and the motor 13
A plurality of valves 13 arranged on the valve bar 13a that moves by the operation of b and capable of injecting plural kinds of raw material liquids into the mixing tank 11.
13 ..., and a scale 12 capable of measuring the weight of the blending tank 11
Based on the measured value of the meter 12, the valves 13 ...
The intermittent blending mechanism 1 including the controller 15 for controlling the opening and closing of the tank is provided, and the auxiliary tank 2 is provided to store the prepared solution prepared by the intermittent blending mechanism 1 and send it to the sub tank 3, and the sub tank 3 is provided. A liquid level detector 31 is provided, a vat 4 is provided to replenish the coater with the liquid, and a supply pipe 5 is provided.
Is provided to supply the liquid preparation from the sub tank 3 to the vat 4,
A completely automated preparation liquid supply device for a coater capable of supplying an accurately prepared preparation liquid by adopting a means for providing an overflow reflux pipe 6 so as to make the preparation liquid flow back from the vat 4 to the sub tank 3. Provided.

〔Example〕

Hereinafter, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings.

First, the intermittent blending mechanism 1 is obtained as follows.

The mixing tank 11 having a cylindrical side wall and a funnel-shaped bottom has a liquid injection port 11a at the upper opening, and a liquid-conditioning outlet valve 11c at the bottom funnel outlet to serve as a liquid outlet 11b. Further, the stirring propeller of the mixer 14 is inserted from the liquid injection port 11a of the mixing tank 11 into the inside. Further, a ring 11d is provided on the side wall of the tank, and the ring 11d is supported by the weighing load cell 12a of the electronic balance from below, and the tank weight can be measured by the weighing machine 12 using the digital balance.

The valve bar 13a provided above the mixing tank 11 is arranged with five valves 13, 13, ..., And the drive of the motor 13b is converted into linear motion by the rack 13c and the pinion 13d to be transmitted and moved. It is possible to move one of them to above the mixing tank 11 liquid inlet 11a.
In addition, there are five valves 13.1 equipped on the valve bar 13b.
3 ... are connected to piping and connected to a storage tank outside the mechanism.

Microcomputer valve open / close controller 15
Controls the opening and closing of the valve 13 above the liquid injection port 11a, and communicates with the meter 12. Further, the controller 15 is relayed to the power amplifier 15a to control the driving of the motor 13b. The valve 13 is opened to inject the raw material liquid into the mixing tank 11, and the valve 13 is closed before the injection amount reaches the set amount. Predict the injection amount per unit time from the measured value of the weight change of the mixing tank 1 caused by opening and closing the valve and the valve opening time, and remove the current liquid amount injected into the mixing tank from the liquid injection set amount. Then, the remaining amount of the valve is determined based on this prediction, and the valve opening time is determined.

The above liquid injection control is performed for each valve, and by driving the motor to move the valves, injection work is performed for all five valves, and then the mixer 14 is moved and stirred to complete the liquid preparation. . This solution can be taken out by opening the solution outlet valve 11c at the bottom of the preparation tank.

The liquid preparation taken out from the intermittent blending mechanism 1 is temporarily stored in the spare tank 2. A pressurized gas such as air or nitrogen is sent into the spare tank 2 to pressurize the temporarily stored preparation and send it out. The sent out solution reaches the sub tank 3. The sub-tank 3 is provided with a liquid level detector 31, and when the amount of the liquid preparation in the sub-tank 3 becomes a certain amount or less, the intermittent preparation mechanism 1 prepares the liquid preparation, and the reserve tank 2 sends it to the sub-tank 3.

Now, the liquid preparation in the sub-tank 3 is sent to the vat 4 by the supply pipe 5 equipped with a pump that is constantly operating. In this vat 4, the liquid preparation is supplied to the coater. An overflow reflux pipe 6 is connected to the upper part of the vat 4, and the liquid that overflows from the vat 4 is refluxed to the sub tank 3. The liquid preparation supplied to the coater by the vat 4 constantly circulates through the sub tank 3, the vat 4, the supply pipe 5, and the overflow reflux pipe 6.

[Effect of the present invention]

As described above based on the examples, the coater solution supply device of the present invention is based on the required amount of solution detected by the liquid level detector of the sub-tank, and the intermittent preparation mechanism prepares the solution, By adopting the method in which the reserve tank sends this liquid preparation to the sub-tank, the equipment itself automatically determines the blending amount of each liquid agent necessary for supplying the liquid preparation, even if it is not monitored by a person, and the human The liquid preparation can be performed automatically and the liquid preparation can be supplied to the coater. Of course, this intermittent mixing mechanism controls the opening and closing of the valve based on the measured value of the mixing tank equipped with the mixer, the movable material injection valve, the meter for measuring the weight of the mixing tank, and the measured value of the meter. Since it is composed of a control device for automatic mixing, intermittent automatic mixing is possible. Moreover, since the intermittent mixing mechanism employs the movable raw material liquid injection valve, even if the number of types of liquid agent to be added increases, it is possible to easily respond by moving the valve. Further, if the blending work is automated, it is possible to divide the blending work many times to shorten the stock time of the liquid preparation.

As described above, the coating liquid supply device for a coater of the present invention completely automates the liquid supply to the coater, which has been difficult to automate in the past, resulting in a variation in quality due to manual mixing work and a harmful effect on workers. It prevents the inhalation of volatile substances,
Very high industrial utility value.

[Brief description of drawings]

FIG. 1 is a block diagram of a preparation liquid supply device for a coater according to an embodiment of the present invention. 1 ... Intermittent mixing mechanism, 11 ... Mixing tank, 11a ... Liquid injection port, 11b ... Liquid outlet, 11c ... Liquid preparation outlet valve, 11d ...
… Ring, 12 …… Weighing meter, 12a …… Weighing load cell, 13
…… Valve, 13a …… Valve bar, 13b …… Motor, 13
c ... rack, 13d ... pinion, 14 ... mixer, 15 ...
… Controller, 15a… Power amplifier, 2… Spare tank,
3 ... Sub tank, 31 ... Liquid level detector, 4 ... Vat,
5 ... Supply pipe, 6 ... Overflow return pipe.

Front Page Continuation (72) Inventor Kiyoshi Yoshida, 9-Kita, Kanazu Town, Sakai-gun, Fukui Prefecture, 157, Toro Sangyo Co., Ltd. Product Development Center (72) Inventor Masatoshi Mitsui Ogawa-dori Ichijo-Kami Levre Blanc Ichijo 203 Room, Kyoto City, Kyoto Prefecture (56) Reference Bibliography Sho 59-193531 (JP, U)

Claims (1)

[Claims] 1. A mixing tank 11 having a mixer 14, and a plurality of valves 13, 13, ... Which are arranged on a valve bar 13a which is moved by the operation of a motor 13b and which can inject plural kinds of raw material liquids into the mixing tank 11. , A meter 12 capable of measuring the weight of the compounding tank 11, and the valves 13 and 13 based on the measured value of the meter 12.
······························································································, A sub tank 3 provided, a vat 4 for replenishing the coater with the preparation, and a supply pipe 5 for supplying the preparation from the sub tank 3 to the vat 4,
A coating solution supply device for a coater, comprising: an overflow reflux pipe 6 for refluxing the solution from the vat 4 to the sub tank 3.