JPS63143930A - Adjustment of setting for mixing ratio of liquids, mixture discharge of ejection method and device thereof - Google Patents

Abstract

PURPOSE:To enable easy adjustment of the mixing ratio of plural liquids, by precisely adjusting an amount of liquid passing through a automatic valve, mixing the effluents conducted to a mixer and permitting the mixture to be discharged or ejected through a gun. CONSTITUTION:Automatic air operating valves 1A, 1B operate with solenoid selector air valves 3A, 3B which open and close intermittently as a pulsed action by means of respective signals transmitted from a pulse controller 5. Consequently, an operating air is supplied into the automatic air-operating valves 1A, 1B and operates the automatic air-operating valves, synchronized to a pulse signal. The liquids A, B are allowed to pass and flow out by an amount integrated during the open time of the automatic air-operating valves. These amounts match those set of a mixing ratio by the pulse controller. These liquids are conducted to a following mixer 15 for mixing process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to setting and adjusting the mixing ratio of a plurality of types of liquids, a discharge or jetting method thereof, and an apparatus therefor.

[Conventional technology]

Conventionally, when determining the mixing ratio of multiple types of liquids, the weights or volumes of the liquids have been measured one by one, and the liquids have been supplied and mixed into a required container or the like. In these cases, especially when precise mixing ratios are required, not only is the effort and time wasted considerably, but it has also caused many problems in terms of work and quality. 1. For example, when determining a paint color, the color tone often depends on a small amount of mixing ratio, and it takes a lot of time to precisely adjust the mixing ratio. In addition, in the case of coating materials and adhesives of the mixed curing reaction type, the reaction progresses during the mixing process, and the viscosity increases during the a-clothing stage, making application difficult in some cases. In addition, the cured product made it difficult to clean the inside of the equipment, and even damaged the equipment, causing many troubles.

Various efforts have been made to eliminate these obstacles.

For example, there is a mixing ratio setting device using a multi-plunger as shown in FIG. A plurality of plungers 21G, 21D, 21E, etc. of the same size are installed in the − row,
These bisten rods 23C, 223D, 23E, . . . are integrally framed, connected to one piston rod 24, and incorporated into the air cylinder 25. In the same figure, 3
One of these plunger pumps 21G is connected to the C liquid tank, and the other two plunger pumps 21D and 21E are connected to each other. Both inlets are connected to the DI8I tank 29 by piping (however, these piping connections can be selected freely).Next, the outflow ports of these plunger pumps are connected to the GA h following the STATEC Miki tank. The operation of the 0th order connected by piping will be explained.

As a premise, the mixing ratio of liquid C and liquid D is 1:2. First, the air cylinder 25 is activated.

When the piston rod 24 descends, the three plunger pumps operate in unison. Then, the liquids are pressed out, and the liquids C and D are injected into the static mixer 30 at a mixing ratio of 1:2. '61. If the combined ratio is a fraction, it is necessary to dilute one of the liquids with a solvent. However, there are limits to this, and if the mixing ratio is very wide, three or more plunger pumps must be used.

In addition, the plunger pump type mixing ratio setting device has various problems. List them.

(1) The mixing ratio cannot be set steplessly (accurately).

(2) Dilution with a solvent requires a lot of man-hours and is uneconomical.

(3) Coating conditions vary due to viscosity reduction due to solvent dilution.

(4) It takes a lot of man-hours to expel the solvent after coating.

(5) Equipment for preventing pollution of the above solvents is required.

(6) Not applicable to solvent-free adhesives.

(7) If there is a large difference in the mixing ratio, a considerable number of plunger pumps are required.

etc.

However, recently there have been many cases where there is a large disparity in the mixing ratio.For example, in the case of two-component curing adhesives, the ratio of the main ingredient to the curing agent is 1=1 to Iglo.
It is o nato. Moreover, these numerical values require comma-level precision.

[Problem to be solved]

As mentioned above, there are various types of liquid mixing ratio setting means.

These can be summarized as follows.

(1) Measure each liquid to be mixed.

(2) In the plunger pump type mixing ratio setting device, 1) the mixing ratio is set in stages;

2) When setting a fraction of the mixing ratio, it is necessary to dilute with a solvent.

3) If the mixing ratio is large, a considerable number of plunger pumps will be required.

The motive of the present invention was to eliminate all of the above-mentioned defects.

[Means to solve the problem]

The gist of the present invention is to open and close an automatic opening/closing valve provided on the flow path of multiple types of liquids to be mixed using a pulse signal,
This method adjusts each flow rate by setting the period and opening/closing time of the pulse signal.

Originally, a pulse signal ranges from several cycles to several thousand cycles per second, and these numerical values, ie, period, open time, and close time.

The pulse controller can easily and arbitrarily change and set one pulse. Therefore, their opening times can be set in milliseconds (thresholds). The total of these times is proportional to the amount of time the liquid passes through the opening/closing valve. The setting adjustment of the amount of liquid passing in millisecond units can be considered to be practically stepless adjustment.

The method of the present invention controls the amount of liquid passing through the valve by opening and closing an automatic opening/closing valve using one or more pulse signals, and performs the same for each of a plurality of liquids. After adjusting the mixing ratio and introducing these into a mixer and mixing them, they are discharged or ejected from a gun or the like.

Next, the configuration circuit of the device of the present invention will be explained. Please refer to Figure 1, W & several tanks 11A, 11B,...
More circular circuit! O.A.

tons,... are piped. The plumbing! OA, IOB,...
above, respectively.

First, from the tank side, the pressure pumps 12A, 12B,...
Next (if necessary, heater H), filter F, and automatic air-type open/close valve IA.

IB, ...and those return pipes are flow rate adjustment valve 13A
, 13I3 is again connected to the inlet of the pump. In addition, the air operating parts of the automatic air-operated open/close valves 1A, IB, ... are the solenoid-type switching air valves 3A, 3B, ...
It further extends to the air switching section and is connected via piping to the operating air MCA. Also, the solenoid type switching air valve 3A: 1
[The solenoid parts 3, . . . are connected by wire to the pulse controller, respectively. And the above automatic air open/close valve 1
The outlets of A, 1B, . . . are connected to a mixer 15, and the mixer is connected to a gun 17 via a pressure regulator 16 if necessary.

[For production]

Next, the effect will be explained. First, each liquid A,
B, . . . are sucked and pressure-fed from the respective tanks 11A, 11B, . . . by pumps 12A, 12B, . The pressure is adjusted to an appropriate pressure for each liquid and is constant and continuous. and.

Both are heated by a heater H if necessary, and fed through a filter F into the automatic air-type on-off valves 1A, IB, . . . . These automatic air-operated opening/closing valves are operated by respective signals issued from the pulse controller 5.
First, the solenoid type switching air valves 3A, 3B, . . . open and close intermittently (in a pulsed manner). As a result, operating air is fed into the automatic air-type opening/closing valves 1A, LB, . . . , and the automatic air-type opening/closing valves are opened and closed in synchronization with the above-mentioned pulse signal.

Then, each of the liquids A, B, . . . is allowed to pass through and flow out by the accumulated opening time of the automatic air-operated on-off valve.

These amounts are based on the respective pulse signals set by the pulse controller, ie, match the set mixing ratio. These liquids are then led to the next mixer 15.

mixed. Although the mixer shown in the figure is a static type mixer, it may also be a stirring type mixer as shown in Figure 2.
6 to the gun, where it is discharged or ejected.

As mentioned above, the cycle and opening/closing time of the above pulse signal can be set and emitted in any way in millisecond units. Figure 3A shows the case where the pulse signal is stopped for the Δ liquid, that is, for the automatic air-type on-off valve 1Δ.
The valve is opened or closed continuously. On the other hand B
Pulse 13 for automatic pneumatic on-off valve IB for liquids
The number is a diagram when the period is 10 cycles, opening is 5+ms, and closing is 95 tatami mats. As a result, the amount of liquid flowing out from each automatic air-operated on-off valve is 100 parts A and 5 parts B.
That is, a mixture ratio of 20:1 is obtained.

Next, pulse settings based on the mixing ratio will be described. First, the mixing ratio is set to 5:3.3. For liquid A, see Figure 3.

Pulse signal cycle 5011z, opening/closing time both l0L
1. For the B liquid, the cycle is the same as above (if the opening time is set to 6.6+as and the opening time is 13.61L+ to 501, the mixing ratio will be the above A liquid 5:B liquid 3,3).

Next, set the mixing ratio of the three liquids. That is, A liquid: B liquid: c
Let H=40:8:3. See Figure 3C, AM
For cycle 30), open time 22.2. Closing time 11.1. For liquid B, the cycle is the same, < 3
011z, I'lN when open 14.4m, closed time 211.9
ms, and for rc fluid, the cycle is 151L
, the opening time is 3.3a+s, and the closing time is 56.9N, the mixing ratio in this case is A liquid 40:BFI[8:C liquid 3.

The above calculation is a calculation on paper, and in reality, it does not faithfully reflect the total opening time, because it takes sub-milliseconds to completely open and close a valve, and in the middle of the process, The amount of liquid flowing out is less than when fully opened.
Therefore, in total, less time passes than the total time. These errors cannot be generally determined because they depend on the structure of the valve, the viscosity of the liquid, etc. Therefore, as a practical matter, it is desirable to calculate the correction value based on actual statistics.

〔Example〕

That l.

Although the above-mentioned opening and closing of the liquid was performed using an automatic air-type on-off valve, a solenoid-type on-off valve may be used in the case where a small amount of liquid flows out at a relatively low pressure.

2. The mixer used in the device of the present invention may be any conventional mixer commercially available, but in Figure 1, a buffering plate type mixer is shown as a static mixer. . After the mixer, if necessary, it is connected to a discharge gun via a constant pressure holder 16. Needless to say, a spray gun can also be attached.

3. In this example, as shown in FIG. 2, a stirring type mixer 25M is used as the mixer. In the same figure, the ejection gun 27G is shown, but a ejection gun can also be attached.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an apparatus according to the method of the present invention. FIG. 2 is a partial diagram of the static mixer shown in the above figure as an agitating mixer. Pulse for 6 liquids (Diagram No. 8 Explanation of main symbols 1A, 111...Automatic pneumatic open/close valve 3A, 3
B,...Solenoid type switching air valve 5...Pulse controller 11A, In,...Liquid tank 12A
, 12B,...Pump 15...Mixer A, B
...Various liquid patents Fl' Applicant Patent Fl' Applicant Nordson Corporation Figure 3A Figure '5B Figure 30 Figure 4 Figure 1 Indication of the case 1985 Patent Application No. 291
919 No. 2 Title of the invention Adjustment of the mixing ratio of liquid, its discharge or jetting method, and its device 3 Relationship with the case of the person making the amendment Patent applicant's residence 3-32-3 Higashina-yo, Parts Yo-ku, Tokyo 140
611, Date of amendment order (shipment date) 1986 2
Month 24th 5 Subject of correction

Claims (1)

[Scope of Claims] 1. A device that pressurizes multiple types of liquids A, B, ... to be mixed to a certain constant pressure, and is provided on their flow paths;
At least one automatic opening/closing valve 1A, 1B, . Open/close valve 1A, 1B
, ..., the amount passing through them is precisely adjusted, and the flowed out is guided to the mixer 15 to be mixed, and further it is sent to the gun 17.
A method for setting and adjusting a mixing ratio of a liquid and discharging or spouting the liquid. 2. The method for setting and adjusting the liquid mixing ratio and discharging or ejecting the liquid according to claim 1, wherein the opening time or closing time of the pulse signal is from 2 milliseconds to 150 milliseconds. 3. The "liquid" described in claim 1 is a "coating agent or adhesive." 4. From the plurality of liquid tanks 11A, 11B, ... through pumps 12A, 12B, ..., respectively, to the same number of automatic air-operated on-off valves 1A, 1B, ..., and air operation of the automatic air-operated on-off valves. The section further extends to the air switching section of the solenoid type switching air valves 3A, 3B, . Automatic air open/close valve 1A, 1B,
... to the mixer 15, and the mixer also connects to the gun 1
7. A device for setting and adjusting a liquid mixing ratio and discharging or ejecting the same. 5. The "automatic pneumatic opening/closing valve" described in claim 4 is a "solenoid opening/closing valve." 6. The "mixer" described in claim 4 is a "static mixer 15 or an agitating mixer 25."