JPH07289881A - Quantitative mixing method of liquid - Google Patents

Abstract

PURPOSE:To mix two or more kinds of solns. in a specified proportion with high accuracy by using a simple structure device. CONSTITUTION:Two kinds of solns. 2a, 2b having different specific gravities or viscosities from each other are mixed by fixed amts. In this method, solns. 2a, 2b are supplied from respective reservoirs 1a, 1b to soln. segment chambers 5a, 5b of volumes preliminarily determined to obtain a desired mixing ratio till the solns. overflow. Then supplying of these solns. 2a, 2b is stopped, and the solns. 2a, 2b in respective segment chambers 5a, 5b are discharged into a mixing chamber 9 and mixed by stirring with a stirrer 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preparing a solution of a base material for a paint, a curing agent and a thinner at a constant ratio.

[0002]

2. Description of the Related Art For example, in the case where a main component of a coating material, a curing agent and a thinner are mixed at a constant ratio, the following method is adopted. A method in which each solution is quantified in the pump body, sent to a mixing container, and mixed in a mixing container using a static mixer. A method of quantifying and mixing the solution sent from each cutting container by detecting the weight and liquid level of each cutting container and sending / stopping each pump.

However, in the quantitative determination by the pump as described above, especially in the case of a highly viscous solution, the mixing accuracy becomes very poor. The other method has a drawback in that the surroundings of the device are easily soiled by the hardened paint, and therefore abnormalities easily occur in sensors for weighing or measuring the liquid level.

Therefore, the set weight is calculated from the preset cut-out volume of the metering pump, the weight of the cut-out solution is measured, and the next cut-out volume is corrected based on the comparison result of these values. (JP-A-2-187141) or a method in which one liquid is pumped at a constant pressure and the other liquid is pumped at a constant flow rate to mix (JP-A-60-48160). A method has been proposed in which the main agent and the curing agent are independently adjusted in temperature so that they have the same viscosity, and then mixed (Japanese Patent Laid-Open No. 61-174966).

[0005]

However, Japanese Unexamined Patent Application Publication No.
In the method proposed in Japanese Patent No. 187141, an error is likely to occur at the time of weight measurement due to the bad environment condition, and the next cutting amount is corrected, so an error occurs each time.

Further, with the method proposed in Japanese Patent Laid-Open No. 60-48160, highly accurate mixing cannot be expected. Further, the method proposed in Japanese Patent Laid-Open No. 61-174966 has a problem that highly accurate mixing cannot be expected because there is no means for measuring the mixing ratio.

The present invention has been made in view of the problems in the above-mentioned conventional preparation method, and is a method for preparing two or more kinds of solutions with high accuracy and at a fixed ratio using an apparatus having a simple structure. Is intended to provide.

[0008]

[Means for Solving the Problems] In order to achieve the above object, a method for quantitatively mixing a solution of the present invention is a method for quantitatively mixing two or more kinds of solutions having different specific gravities and viscosities, and a desired mixing ratio. To each solution cut-out container of a predetermined volume so that the solution is supplied from each solution reservoir until it overflows, then the supply of these solutions is stopped, and then the solution in each solution cut-out container is dissolved. It is supposed that the mixture is discharged into the mixing container and mixed by stirring.

[0009]

The method for quantitatively formulating a solution of the present invention comprises supplying each solution cutting container having a predetermined volume so that a desired mixing ratio is obtained, until the solution overflows from each solution reservoir and then Since the solution remaining in the solution cutout container is discharged into the solution mixing container and mixed by stirring, the respective solutions are always mixed in predetermined amounts.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in FIG. FIG. 1 is a schematic explanatory view of an apparatus in the case of mixing two kinds of solutions by using the solution quantitative preparation method of the present invention.

In FIG. 1, 1a and 1b are solution reservoirs filled with solutions 2a and 2b to be prepared, and the solutions 2a and 2b in these solution reservoirs 1a and 1b are
Pipes 4a and 4b are provided by the feed pumps 3a and 3b, respectively.
It is supplied into the solution cut-out containers 5a and 5b via.
The volume of each of the solution cutting containers 5a and 5b is predetermined so that a desired mixing ratio can be obtained, and the solutions 2a and 2b supplied in excess of this volume are supplied via the return pipes 6a and 6b, respectively. It is designed to return to No. 1a and 1b.

Therefore, the solution cut-out container 5 is surely
In order for the volumes of the solutions 2a and 2b supplied into the a and 5b to be preset volumes, the solution cut-out containers 5a and 5b
It is sufficient to supply the solutions 2a and 2b having a volume equal to or more than the above from the solution reservoirs 1a and 1b. Therefore, in the method of the present invention, the operation time of the feed pumps 3a, 3b is set by the timers 7a, 7b so that the solution 2a, 2b has an amount exceeding the predetermined volume of the solution cutting container 5a, 5b. . By doing so, the solution cut-out containers 5a and 5b are not affected by the error in the feed amount of the feed pumps 3a and 3b each time the feed pumps 3a and 3b are operated, and a fixed amount of the solution 2 is supplied.
This means that a and 2b have been supplied.

The solutions 2a and 2b measured in the solution cut-out containers 5a and 5b are poured into the solution mixing container 9 by opening the cut-out valves 8a and 8b, and stirred by the stirrer 10 in the solution mixing container 9. Mixed and mixed. By the way, since the total amount of the solutions 2a and 2b in the solution cut-out containers 5a and 5b needs to be poured into the solution mixing container 9, the opening operation time of the cut-out valves 8a and 8b can be sufficiently spared by the timers 11a and 11b. Set with.

The mixed solution 12 that has been stirred is tilted by a suitable means in the solution mixing container 9 and the mixed solution reservoir 1
3 and then, if necessary, it is delivered to a predetermined place by a pump 14 through a pipe 15.

As described above, the feed pumps 3a and 3b are arranged so that the amount of the solutions 2a and 2b to be fed becomes equal to or larger than the volume.
By setting the operating times of the timers 7a and 7b in advance, the excess solution 2a from the solution cut-out containers 5a and 5b can be reliably provided unless the pipes 4a and 4b are clogged.
2b can be overflowed, but as a precaution, a sensor 16 is provided at the inlet of the return pipes 6a, 6b, for example.
It is more reliable if a and 16b are installed and it is possible to confirm that the solutions 2a and 2b overflow.

At this time, if it can be confirmed that the excess solutions 2a and 2b have overflowed from the solution cut-out containers 5a and 5b, the installation positions of the sensors 16a and 16b are returned as in this embodiment. Other than the inlets of the pipes 6a and 6b, for example, an outlet or another place may be used.

Further, as described above, the sensors 16a, 16
If it is confirmed that the excess solutions 2a and 2b overflow from the solution cutting containers 5a and 5b by using b, the excess solutions 2a and 2b overflow without setting the timers 7a and 7b. It is also possible to stop the operation of the feed pumps 3a and 3b after confirming that they are present.

In this embodiment, the case of mixing two kinds of solutions has been described. However, when mixing three or more kinds of solutions, the number of the solution reservoirs, the feeding pump, the piping, the solution cutting container, and the return piping are required. Needless to say, it is sufficient to install the etc.

[0019]

As described above, according to the method of the present invention, after the solution is supplied from the respective solution reservoirs to the respective solution cut-out containers having the predetermined volumes so as to obtain the desired mixing ratio until the solution overflows, Since the solutions remaining in the respective solution cutout containers are discharged into the solution mixing container and agitated and mixed, the respective solutions are always mixed in predetermined amounts, and can be mixed with high accuracy. Further, the sensor used in the method of the present invention is not for measuring the amount of the solution as in the conventional method, but simply detects the overflow of the solution from the solution cutting container, and thus the conventional sensor was used. There is no problem like the method.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of an apparatus for carrying out the quantitative solution preparation method of the present invention.

[Explanation of symbols]

 1a Solution Reservoir 1b Solution Reservoir 2a Solution 2b Solution 3a Feed Pump 3b Feed Pump 4a Piping 4b Piping 5a Solution Cutting Container 5b Solution Cutting Container 8a Cutting Valve 8b Cutting Valve 9 Solution Mixing Container 10 Stirrer 12 Mixed Liquid

Claims (1)

[Claims] 1. A method for quantitatively mixing two or more kinds of solutions having different specific gravities and viscosities, each solution being put into each solution cutting container having a predetermined volume so as to obtain a desired mixing ratio. A method for quantitatively preparing a solution, which comprises supplying the solutions until they overflow and then stopping the supply of these solutions, and then discharging the solutions in the solution cutting containers into the solution mixing containers and stirring and mixing.