JPH0450523B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an apparatus for measuring a fixed amount of high viscosity liquid. (Prior art and its problems) Preparation of colored paste in textile printing is an important operation that determines the color quality of printed products. Usually, this color paste is made by mixing a dye powder or a dye liquid containing a dye powder dissolved therein and a size liquid containing a sizing material dissolved in water and an auxiliary agent in a fixed ratio and stirring the mixture. 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. In particular, the size liquid, discharge printing agent, and dye resisting agent have to be measured in large quantities and have high viscosity, making them difficult to handle. Conventionally, the measurement of this size liquid or auxiliary agents such as discharge printing agent and dye resisting agent (hereinafter collectively referred to as size liquid) is as follows:
Place the container to be mixed and stirred on a platform scale, set the measuring scale to the required amount of size liquid, and pour the size liquid into the container by manually opening the valve from the size liquid storage tank, or scoop the size liquid from the size liquid container with a ladle and pour it into the container. In this method, it is determined visually that the required amount has been reached according to the platform scale instruction, and the feeding is stopped. However, this method requires careful consideration because it is a manual process, and has the disadvantage 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 factors such as the viscosity of the glue and fluctuations in the rotational speed of the fixed displacement pump.
Another disadvantage is that it requires work to convert the amount of input into time. As yet another method, Japanese Utility Model Publication No. 46-23614 discloses that the size liquid is fed into the paste using a constant volume pump, and when the cumulative number of revolutions corresponding to the required amount of injection is reached, an electromagnetic clutch between the motor and the pump is used. 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 mechanically complex and causes an increase in costs, 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 certain amount of high viscosity liquid. Set the stop valve installed on the outlet side piping and the nozzle with numerous pores, the density of the size liquid, the discharge amount per unit rotation speed of the metering pump, the inertia rotation speed of the metering pump, and the required weighing weight value. It consists of a setting device and a computer that calculates and controls the rotation 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 larger than the cross-sectional area of the piping. The gist of the present invention is to provide a measuring device for glue liquid, which is characterized by the following. Next, the present invention will be explained in more detail using illustrated examples. In FIG. 1, tanks 1 to 1n are tanks for storing dissolved glue, tanks 4 to 4n are intermediate storage tanks, and level detection ends 11 to 1 are used as control mechanisms for controlling the liquid level.
1n, 12 to 12n and level controller 1
0 to 10n are attached. Metering pumps 7-7n are connected to the intermediate storage tanks 4-4n, and nozzles 8-8n are attached to the discharge side of the pumps 7-7n. The container 13 is a subdivided container of a size corresponding to the amount of glue to be prepared, and is used to store a fixed amount of each glue, and add and mix dye and water. A meter 16 for measuring the amount of water to be added and a valve 17 are installed in a conduit that supplies water to the subdividing container 13. The control panel 15 controls each amount of glue and water to be set to a predetermined value, and is configured to control the start/stop of the metering pumps 7 to 7n and open/close the valve 17 based on signals from each detection end. There is. 2 and 3 show nozzles 8 to 8n attached to the discharge side of metering pumps 7 to 7n.
0 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 metal fittings and screws that hold the stop valve 23 and spring 24, and 26 is an O-ring for sealing. It's Patsukin. Next, the process of the method of the present invention will be explained with reference to FIG. The size liquid storage tanks 1 to 1n, which are installed according to the type of paste required for textile printing, store the amount of paste used for several days. The size liquid in the tanks 1 to 1n is sent via a pipe 3 and a valve 2 to intermediate storage tanks 4 to 4n by a head or a pump. The intermediate storage tanks 4 to 4n are installed to stabilize the suction amount of the metering pumps 7 to 7n.
It is preferable that the discharge port and the suction port of the metering pumps 7 to 7n be connected by as short a distance as possible. In order to keep the liquid level in the tanks 4 to 4n constant, the level meter 5, level controller 10, and level detection terminals 11 and 12 are connected to the intermediate storage tanks 4 to 4n.
When the liquid level falls below the detection end 11, the valve 2 is opened to supply liquid, and the supply is stopped at the level detection end 12 to control the liquid level between the detection ends 11 and 12. Control panel 15 for metering pumps 7 to 7n
The paste is started and stopped by a control signal from the controller, and a predetermined amount of paste is supplied to the container 13. Nozzle 8 attached to the tip of piping 14-14n from metering pump 7-7n
-8n is for preventing the paste liquid in the pipe 14 from dripping when the metering pumps 7-7n are stopped. That is, in order to minimize piping pressure loss when transferring a high viscosity liquid and to improve the metering accuracy of the metering pump, the piping 14 needs to be 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 drips from the tip of the pipe after the supply is stopped, resulting in a decrease in measurement accuracy. A multi-hole nozzle 8 to 8n is provided with a plurality of pores having a diameter below the limit diameter at which a dripping phenomenon does not occur depending on the viscosity of the glue, and the total cross-sectional area of the pores is greater than or equal to the cross-sectional area of the pipe 14. By attaching it to the tip of the pipe 14, dripping is prevented. Furthermore, a stop valve 23 which is pressed by a spring 24 shown in FIG. 2 is provided to prevent the size liquid from being pushed out from the nozzles 8 to 8n due to the residual pressure in the pipes 14 to 14n when the size liquid supply is stopped. In this way, by providing the multi-hole nozzles 8 to 8n and the stop valve 23 to prevent dripping at the tip of the discharge pipe, air is prevented from entering the discharge pipe, and the next time the pump is started, the glue equal to the pump metered discharge amount is removed. The liquid is discharged from the discharge port, and a fixed amount 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 control operation. The required measured weight value (W) is set on the measured value setting board 34, and the required number of revolutions of the metering pump 7 is calculated. The measured weight value is converted into a pump rotation speed by a rotation speed setting calculation unit 33 (computer).
This rotation speed setting calculation unit 33 measures the density (w) of the size liquid and the discharge amount (v) per unit rotation speed of the metering pump 7 in advance according to the characteristics of the size liquid to be measured, and sets the discharge amount per density rotation speed. The set value set on the panel 35 and the inertia rotation speed (n) of the metering pump 7 are measured in advance, and the required rotation is determined by the following formula based on the set value (n) set on the pump inertia rotation speed setting board 36. Calculate the number (N). N=W/w・v−n After the above calculations are completed, press the start button 37 to start.
The stop operation device 32 (electromagnetic switch) is activated to start measuring. A rotation pulse signal is sent to a rotation speed counter 30 from a rotation pulse transmitter 9 which measures the rotation speed according to the rotation of the metering pump 7, and the rotation speed is counted. The set value/counter comparison circuit 31 determines whether the rotation speed has reached the required rotation speed set value (N), and when the set value and the count value match, a stop signal is issued to stop the metering pump. 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 pump rotation. Selected according to required accuracy. Normally, colored pastes are used by selecting the adhesive properties depending on the printing pattern, the fabric to be printed, and the printing method.
For this reason, colored pastes may be prepared by mixing several types of paste liquids with different characteristics. When creating this size liquid mixture, the size liquid mixture ratio recipe is stored in advance in the computer of the rotation speed setting calculation unit 33, and a recipe selection button is provided on the measurement value setting board 34, and the recipe is selected when setting the measurement value. The calculation section calculates the measured value of each size liquid according to the mixing ratio of the corresponding recipe, and calculates the required number of rotations for each size liquid (N ₁ ~

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[Table] (Effects of the Invention) According to the present invention, the labor required for measuring the size solution can be significantly reduced, human error can be reduced, a high degree of measurement accuracy can be obtained, and excellent printing quality can be ensured.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the entire device of the present invention, and FIG.
3 is a bottom view of the nozzle, and FIG. 4 is a block diagram of the control operation float. 1~1n...Tank, 2~2n...Valve, 4~4
n...Intermediate storage tank, 6~6n...Pipe,
7~7n...metering pump, 8~8n...nozzle.

Claims (1)

[Claims] 1. A volumetric measuring pump installed downstream of the size liquid tank, a nozzle equipped with a stop valve and a large number of pores installed on the outlet side piping of the measuring pump, the density of the size liquid, and the per unit rotation speed of the measuring pump. a setting device for setting the discharge amount of the metering pump, an inertial rotation speed of the metering pump, and a required weighing weight value, and a computer that calculates and controls the rotation speed of the metering pump based on information from the setting device; A size liquid measuring device characterized in that the sum of the cross-sectional areas of the pores is larger than the cross-sectional area of the piping.