JPH03233323A - Metering device for size liquid - Google Patents

Abstract

PURPOSE:To obtain a high degree of metering accuracy and to assure printing quality by constituting nozzles in such a manner that the sum total of the sectional areas of the fine holes thereof is larger than the sectional area of a piping, thereby drastically lessening the labor for metering and decreasing human errors. CONSTITUTION:The perforated nozzles 8 to 8n which are provided with the fine holes of the diameter below the threshold diameter at which the dropping according to size viscosities does not arise and are formed to have the total sum of the section areas thereof larger than the sectional area of the piping 14 are mounted to the front end of the piping 14 to prevent the dropping. Further, stop valves 23 which are brought into pressurized contact by springs 24 prevent the size liquids from being extruded from the nozzles 8 to 8n by the pressures remaining in the piping 14 to 14n at the time the supply of the size liquids stops. The size liquids equal to the discharge quantity of the pumps by metering are discharged from discharge ports simultaneously with the start of the pumps at the next metering so that the supply at the constant rate is possible regardless of the length of the liquid feed pipes from the metering pumps to the liquid feed pipes. Since plural sizes of the size liquids are simultaneously metered, the metering is executed in a short period of time and the remarkable improvement in productivity is made.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an apparatus for measuring a fixed amount of a high viscosity liquid.

(Conventional technology and its problems) The preparation of colored paste in textile printing is an important task that determines the color quality of printed products.Normally, this colored paste is made by mixing dye powder or a dye liquid containing dissolved dye powder with umerin in water. It is made by mixing and stirring in a fixed ratio a paste solution dissolved with an auxiliary agent. Further, depending on the printing method, an auxiliary agent such as a discharge printing agent or a dye resisting agent is added to the colored paste and the mixture is stirred and mixed again.

The amount of colored paste to be produced differs for each colored paste depending on the amount of printing, the area of printing, the amount of adhesion of printing, etc. Therefore, it is necessary to measure the dye, size liquid, and auxiliary agent each time for each color paste, and most of the color paste production work is spent on this measuring work. Especially the glue,
Discharging agents and resisting agents have to be measured in large quantities and have high viscosity, making them difficult to handle.

Conventionally, to measure the size liquid or auxiliary agents such as discharge printing agent and dye resisting agent (hereinafter collectively referred to as size liquid), the container to be mixed and stirred was placed on a table scale, and the measuring scale was set at the required amount of size liquid. and set
Either manually open the pulp from the size liquid storage tank and pour it into the container, or scoop it up from the size liquid container with a ladle and pour it in. Feeding is stopped when it is determined visually that the required amount has been reached according to the platform scale instructions. It is done in this way. However, this method requires careful consideration because it is a manual process, and has the drawbacks of being prone to human error and requiring labor.

Another method is to feed the size liquid using a fixed volume pump and control the amount of injection by setting the pump operation time corresponding to the required amount of injection using a timer. However, this method is prone to errors due to changes in the viscosity of the paste liquid, the rotational speed of the fixed displacement pump, etc., and has drawbacks such as the need to convert the input amount into time.

Furthermore, as another method, Japanese Utility Model Publication No. 46-23614 discloses that the size liquid is fed by a constant volume pump, and when the total number of revolutions corresponding to the required amount of injection is reached, a 1ttti clutch between the motor and the pump is connected. A device has been proposed that instantly stops the rotation of the pump and controls the input amount. However, when this device is applied to a metering pump for high-viscosity paste liquid, it becomes a cause of the coster knob due to the am mechanism, and also causes air to flow into the piping due to the reversal of the discharge pressure and head pressure. There are disadvantages in that errors occur during the next measurement and clogging occurs due to solidification of the paste.

(Means for Solving the Problems) The present invention aims to eliminate these drawbacks and measure a fixed amount of high viscosity liquid. A stop valve and a nozzle equipped with numerous pores are installed on the outlet side piping, and the density of the size liquid,
A setting device for setting the discharge amount per unit rotational speed of the metering pump, the inertia rotational speed of the metering pump, and the required weighing weight value, and calculating and controlling the rotational speed of the metering pump based on information from the setting device. The gist of the present invention is to provide a size liquid metering device comprising a computer, and characterized in that the total cross-sectional area of the pores of the nozzle is larger than the cross-sectional area of the piping.

The invention will now be explained in more detail by way of illustrated examples.

In Figure 1, tanks (1> to (1n) are tanks for storing dissolved paste liquid, and tanks (4) to (4n) are intermediate storage tanks, which are used as a control mechanism to control the liquid level. level detection terminal (11) ~(llr
i) , (12) to (12n) and level controllers (10) to (10n) are attached.

Metering pumps (7) to (7n) are connected to the intermediate storage tanks (4) to (4n), and nozzles (8) to (8n) are connected to the discharge sides of the pumps (7) to (7n).
is installed. The container (13) is a small container of a size corresponding to the amount of glue to be prepared, and is used to store a certain amount of each glue, and add and mix dye and water. A meter (16) for measuring the water to be added and the pulp (17) are installed in the conduit supplying the water to the container (13). The control panel (15) controls the amount of glue and water set to predetermined values, and the stationary pump (15) is controlled by the signals from each detection end.
7) to (7n), and the valve (17) is opened and closed.

Figures 2 and 3 show nozzles (8) to (8n) attached to the discharge side of metering pumps (7) to (7n),
(20) is a frame, (21> is a discharge part having a multi-hole nozzle (22), (23) is a stop valve, (24) is a check spring, (25) and (27) are the stop valves (23). and metal fittings and screws for holding the spring (24), and (26) is a sealing ring packing.

Next, the process of the method of the present invention will be explained with reference to FIG.

A size liquid storage tank (
1) to (In) store glue to be used for several days. The paste in the tanks (1) to (in) is sent to intermediate storage tanks (4> to (4n) via pipes (3) and valves (2) by head or pump. 4n) are metering pumps (7) to (7n
) is installed to stabilize the suction amount of the tank (
4) - (4n) outlet and metering pump (7) - (7n)
It is preferable to connect it to the suction port at a distance as short as possible. In addition, in order to keep the liquid level in the tanks (4) to (4n) constant, a level meter (5) and a level controller (1) are installed.
0), and level detection ends (11) and (12) are attached to the intermediate storage tanks (4) to (4n), and when the liquid level falls below the detection end (11), the valve (2) is opened to supply liquid. Then, the supply is stopped at the level detection end (12), and the liquid level is controlled between the detection ends (11) and (12). The metering pumps (7) to (7n) are started and stopped by control signals from the control panel (15), and a predetermined amount of the paste is supplied to the container (13).

From metering pump (7) ~ (7n) to piping (14) ~ (
Nozzles (8) to (8n) attached to the tip of 14n)
When the metering pumps (7) to (7n) are stopped, the piping (1
4) This is to prevent the glue inside from dripping.

In other words, in order to minimize piping pressure loss when transferring high viscosity liquids and improve the quantitative accuracy of stationary pumps, piping (1
For 4), it is necessary to use a pipe with as large a diameter as possible. Even if the size liquid has a high viscosity in a pipe with a large diameter, a phenomenon occurs in which the size liquid sequentially drips from the tip of the pipe after the supply is stopped, resulting in a decrease in measurement accuracy. A porous nozzle (8) having a plurality of pores having a diameter below the limit diameter at which no dripping phenomenon occurs according to the viscosity of the glue, and the total cross-sectional area of the pores being greater than or equal to the cross-sectional area of the pipe (14). ) to (8n) are attached to the tip of the pipe (14) to prevent dripping. Furthermore, a stop valve (23) which is pressed by a spring (24> shown in FIG. ).In this way, by providing the porous nozzles (8) to (8n) and the valve (23) to prevent dripping at the tip of the discharge pipe, air can flow into the discharge pipe. In the next measurement, when the pump is started, a size liquid equal to the pump metered discharge amount is discharged from the discharge port, and a fixed amount of liquid can be supplied regardless of the length of the liquid pipe from the metering pump to the discharge port.

FIG. 4 shows a block diagram of the IIIIII operation. Enter the required weight value (W) on the weight value setting panel (34).
) and calculate the required rotation speed of the metering pump (7). The rotation speed setting calculation unit (33) (computer) converts the measured weight value into the pump rotation speed. This rotation speed setting calculation unit (33) roughly measures the density (W) of the size liquid and the discharge amount (V) per unit rotation speed of the metering pump (7) according to the characteristics of the size liquid to be measured, and then performs the density rotation. Setting value set on the discharge amount setting panel (35) and metering pump (7)
The inertia rotation speed (n) of the pump is roughly measured, and the required rotation speed (N) is calculated using the following formula based on the setting value (n) set on the pump inertia rotation speed setting board (36).

After N = -n or more calculations are completed, press the start button (37) to turn on the start/stop operation device (3).
2) Start the (electromagnetic switch) and start weighing. The rotation pulse signal is sent to the rotation speed counter (3) from the rotation pulse transmitter (9) that measures the rotation speed according to the rotation of the metering pump (7).
0), count the number of feed revolutions. In the set value/counter comparison circuit (31), the number of revolutions is determined as the required number of revolutions set value (N).
It is determined whether the count value has been reached, and a wait stop signal is issued when the set value and the count value match, and the metering pump is stopped. In order to accurately control the rotation speed, it is preferable that the rotation pulse transmitter of the metering pump has a mechanism that transmits a signal of 6 to 30 pulses per rotation of the pump.
Selected depending on rotation speed and required measurement accuracy.

Normally, colored pastes are used by selecting the properties of the paste depending on the printing pattern, the fabric to be printed, and the printing method, and for this reason colored pastes are sometimes created by mixing paste liquids with several different properties. be.

When creating this size liquid mixture, the mixing ratio recipe of the rough size liquid is stored in the computer of the rotation speed setting calculation unit (33), and a recipe selection button is provided on the weighing value setting board (34), and when setting the weighing value, After selecting the recipe, the calculation section calculates the measured value of each size liquid according to the mixing ratio of the corresponding recipe, sets the required rotation speed (Nl ~ ~Nn) of each size liquid according to the above calculation formula, and then starts the metering pump. are started at the same time, and the metering pump whose rotational pulse count number for each size liquid matches is stopped, and the measurement ends when all the size liquids have been measured.

In the conventional weighing method using a platform scale, it took a long time to weigh one color glue because multiple size liquids were weighed in sequence, but with the present invention, multiple size liquids can be weighed at the same time. Because it weighs, it can be measured in a short time, greatly improving productivity.

This will be explained in more detail in Examples below.

(Example) 4 storage tanks (1), 4 intermediate storage tanks (4), 4 metering pumps (7), and flow meters (
16) Four types of glue amounts and water were measured using an apparatus basically consisting of one water measuring line including a valve (17). Table 1 shows the types and properties of the glue, and Table 2 shows the m-mix recipe, which is expressed as a percentage with the weight after mixing as 100.

Table 3 shows the metering pump characteristics. The intermediate storage tank was a 2001 tank, and the level fluctuation was set to within 30 cm using a liquid level meter. Each size liquid has two discharge ports.
A multi-hole nozzle with 170 holes of 83 mmφ and a back pressure Q,
A stop valve that operates at 5 kg/cm" was installed. The metering pump rotation speed pulse transmitter was composed of a photoelectric signal transmitter and a light cutoff rotary plate that generates 20 pulses per pump revolution. The water flow rate was tM1. 10 using a flow meter
Weighing was done by sending cc/pulse.

Under the above conditions, the amount of colored glue is 10kg, 20kg, and 30kg.
, 40 kg, and 50 kg for each recipe, the accuracy for each amount of glue (A, B, C, D) and each required amount of water was within 1%, and the accuracy for the total amount of colored glue was within 2%. . In addition, a proportionate amount of dye was added to the paste, stirred, and after the color was printed, the color was measured and the color was compared. As a result, the color difference was 1.5 N.
It was below B.S.

(Effects of the Invention) According to the present invention, the labor required for measuring size liquid is significantly reduced, human error is reduced, a high degree of measurement accuracy is obtained, and excellent printing quality is ensured. I can do it.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the entire apparatus of the present invention, FIG. 2 is a longitudinal sectional view of the nozzle, FIG. 3 is a bottom view of the nozzle, and FIG. 4 is a block diagram of the control operation float. 1~In...tank, 2~2n...valve, 4~4n...intermediate storage tank, 6n...pipe, 7n...metering pump, n...nozzle. Figure 1 Figure

Claims (1)

[Claims] (1) A volumetric pump installed downstream of the size liquid tank,
A stop valve provided on the outlet side piping of the metering pump and a nozzle equipped with a large number of pores, the density of the size liquid, the discharge amount per unit rotation speed of the metering pump, the inertial rotation speed of the metering pump, and the required weighing weight value. and a computer that calculates and controls the rotational speed of the metering pump based on information from the setting device, and the total cross-sectional area of the pores of the nozzle is greater than or equal to the cross-sectional area of the piping. A size liquid measuring device characterized in that it is configured as follows.