JPS6362709A - Two pack type liquid mixing and discharging device - Google Patents

Abstract

PURPOSE:To permit temperature control, restricting the resinification of liquid, as well as the remarkable reduction of washing frequency and the replacement frequency of a mixer, by a method wherein liquid tanks, containing two-pack type liquid separately, are receiving in a liquid container, in which heating liquid is circulated, while a valve device and the mixer are heated independently. CONSTITUTION:Oil 24, heated to a proper temperature, is supplied to a liquid container 21, an electric heater 22 in a valve device 5 and the electric heater 23 in a mixer 7 are conducted while respective liquid tanks 29, 30, 31, the valve device 5 and the mixer 7 are kept in respective different temperatures. Subsequently, the peripheral grooves 14a of a spool 14 in the valve device 5 are positioned at the suction side of liquid passing holes 11, 12 for two-pack type liquid and a plunger pump 6 is operated to circulate the two-pack type liquids between the liquid tanks 1, 2 and a pump chamber 6a. An actuator 6c is operated simultaneously with the retreating of a piston 6b to turn the spool 14 by 90 deg. and supply the two-pack type liquid in the pump chamber 6a into the mixer 7. Then, the spool in the valve device 5 is opened to guide washing liquid from the liquid tank 3 and wash the valve device 5 and the inside of the mixer.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for mixing and discharging two liquids of resin raw materials.

(Prior Art) This type of two-liquid mixing and discharging device is configured as shown in FIG. 2, for example. In the figure, 1 is a first liquid tank that stores liquid A, 2 is a second liquid tank that stores liquid B, and 3 is a third liquid tank that stores cleaning liquid. are listed in bulk. A valve device 5 is attached to the lower surface of the base 4, and a plunger pump B and a mixer 7 are integrally connected to the valve device 5. The valve device 5 is connected to each of the liquid tanks 1, 2 .
3 and the base 4. Liquid passage holes ti, t2. +3 individually, and a spool 14 that opens and closes the liquid passage holes 11, 12, and 13.
Built-in.

The spool 14 is rotationally driven by an actuator (not shown), and has two liquid passage holes 1 on its circumferential surface.
1. Suction side of 12 and pump chamber 8 of plunger pump 6
a (one side is omitted) and the discharge side of the two liquid passage holes 11 and 12 for the pump chamber 6 selectively i! l! Circumferential groove 1 to pass through
4a' (one side omitted) is provided, the suction side of the cleaning liquid passage hole 13, the second liquid passage hole 11,
12 discharge side and i! I! A communicating hole +4b is provided.

Here, the circumferential groove 14a and hole in the spool 14! 4
The arrangement of b is determined so that the two-liquid liquid passage hole 11.12 and the cleaning liquid passage hole 13 can be opened and closed for mating. Also, plunger pump 6.

It consists of pistons eb (one side is omitted) slidably inserted into each of the pump chambers 6a and one actuator 6C that reciprocally interlocks these pistons 6b. Further, the valve device 5 is equipped with a spool 15 that independently opens and closes the cleaning liquid passage hole 13. Further, the mixer 7 includes a plurality of mixing elements 7c housed in a housing 7b having a discharge lower a.

With this configuration, the circumferential groove 14a of the spool 14 is now
When the piston 6b is switched to the suction side (the state shown),
When the tank is discharged from work, water flows from the first tank l and the second tank 2 through the liquid passage hole 8.8 on the liquid tank side, the liquid passage holes 11 and 12 on the valve device side, and the circumferential groove 14a of the spool.
, B2 liquid is sucked into the pump chamber 6a, and conversely, when the piston eb is moved forward, the sucked two liquids are sucked into the first liquid. ? j
It is sent back to tank 1.2 of S2. = On the other hand, after sucking the two liquids into the pump chamber 6a, when the spool 14 is rotated 80 degrees to switch the circumferential groove 14a to the discharge side and move the piston 6b forward, the two liquids in the pump chamber Ba will flow through the liquid passage hole it. , 12
is pumped to the discharge side. Then, this pressure-fed z liquid is fed to the mixer 7, and the mixing element 7 therein
They are mixed while passing through C and are discharged from discharge port 17a.

By the way, the temperature range in which the two liquid resin raw materials or the cleaning liquid can maintain a good liquid state is determined, and for this reason, conventionally, the entire apparatus shown in Figure 2 of L is placed in an oil bath or hot air oven to adjust the liquid temperature. It performs so-called temperature control, which maintains the temperature at -.

(Problems to be Solved by the Invention) However, in the temperature control system of the conventional two-liquid mixing and discharging device described in H, each liquid tank is ! ,2,l,valve device5. The mixer 7 must be heated uniformly in the rg mode, and for this reason, when using a resin raw material that requires strict liquid temperature control, such as a nylon raw material, the valve device 5 and the mixer 7 side The liquid temperature becomes higher than the desired temperature, making it easy for the liquid to turn into resin. As a result, frequent cleaning with cleaning liquid is forced, and in the worst case, cleaning is required after every shot, resulting in a significant increase in raw material loss and cleaning liquid loss. There was a problem.

Note that the problem described in -H is not limited to the integrated two-liquid mixing and discharging device shown in Figure 2, but is applicable to general-purpose two-liquid mixing and discharging devices that have separate liquid tanks, plunger pumps, valve devices, and mixers. A similar problem occurred in the mixing and discharging device.

(Means for Solving the Problems) In order to solve the problems of the prior art described in 1., the present invention provides a liquid tank for storing two liquids, and a liquid tank for storing two liquids, and two liquids pressure-fed from the liquid tank to the circulation side and the discharge side. and a mixer that mixes the two liquids pumped through the valve device, respectively.
The feature is that the temperature can be controlled independently.

In the present invention, each liquid tank is provided with a liquid tank that accommodates each liquid tank individually or all at once, and heating fluid is circulated within the liquid tank to indirectly heat the liquid tank. As the heating fluid, an oil liquid, hot water, etc. can be used, but it is preferable to use an oil liquid due to the size of the heat capacity ta, and heating of these fluids is performed using a temperature control pump unit equipped with a separate heat source. This temperature control pump unit and the liquid tank may be connected by piping, and a heating wave body may be circulated between the two.

On the other hand, the valve device and mixer are each provided with independent heating stages. This heating means may be, for example, an electric heater inserted into a hole provided in each of the elements, or a heating fluid flowing through the hole.
Further, especially for these elements, the heating means can be further subdivided so that a temperature gradient is created between the inlet side and the outlet side of the z liquid.

Furthermore, the two-liquid mixing and discharging device according to the present invention is not limited to the manner in which the liquid tank, valve device, and mixer are installed, and includes devices in which these elements are integrated or separated.

(Function) In the two-liquid mixing and discharging device having the configuration L, the temperature of the liquid tank, valve device, and mixer can be controlled independently. Alternatively, it becomes possible to control the temperature of the mixer to a low temperature using the valve device, and it becomes possible to significantly suppress the conversion of the two liquids into resin.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 shows a two-liquid mixing and discharging device according to the present invention. In this figure, the same elements as those shown in the above-mentioned FIG. 3 is stored all at once in the liquid tank 21, and the valve equipment 5 and mixer 7 are
The point is that electric heaters 22 and 23 are embedded in each of the . The oil tank 21 is connected via piping to a temperature control pump unit (not shown), through which an oil liquid 24 heated to a predetermined temperature flows.

Furthermore, the electric heaters 22 and 23 are each connected to a German power source.

With this configuration, first, the temperature control pump unit (not shown) is operated to supply the oil liquid 24 heated to an appropriate temperature to the liquid tank 21.
The valve device 5 is supplied with a power supply (not shown).
electric heater 22 in the mixer 7 and electric heater 2 in the mixer 7
3 is energized, and each liquid tank 29.3G, 31. The valve device 5 and mixer 7 are maintained at different temperatures.Next, the circumferential groove 14a of the spool 14 in the valve device 33 is 2. The plunger pump 8 is operated with the plunger pump 8 positioned on the suction side of the liquid passage hole 11.12, and its piston 6b is moved reciprocatingly to cause the two liquids to flow back and forth between the liquid tanks 1, 2 and the pump chamber 6a. circulate).

During the circulation of the L liquid, in accordance with the withdrawal of the piston 8b, that is, the suction of the two liquids into the pump chamber Bb, the 7 cutout 6C is operated at an appropriate timing, and the spool 14 is moved to 9.
It is rotated 0 degrees and the two liquids in the pump chamber 6a are supplied into the mixer 7. As a result, a fixed amount of the two mixed liquids is discharged from the discharge lower a of the mixer 7.

Then, after a predetermined number of discharges, the spool 15 in the valve device 5 is opened, and the holes in the cleaning liquid passage hole 13 and the spool 14 are opened. 4
Cleaning liquid is led from the third liquid tank 3 through b to clean the inside of the valve system 215 and the mixer 7. Therefore, the temperature of the liquid tanks 1, 2, 3, the valve device 5, and the mixer 7 is independently controlled, which makes it possible to set conditions that suppress the conversion of the two liquids into resin, thereby reducing the number of times of washing. You will be able to do this.

By the way, by using the wood two-liquid mixing and discharging device, liquid tanks 1 and 2
．． 3 to 80 to 85°C, and the temperature of valve device 215 to 80 to 85°C.
When the temperature of the mixer 7 was set at 90°C and the temperature of the mixer 7 was set to 72 to 75°C, and the discharge was repeated in a 1-minute cycle for the nylon raw material, the cleaning frequency was once every 10 to 20 times, and the mixer 7 was
The replacement frequency was once every 10 days. This is the second
Using the conventional two-liquid mixing and dispensing device shown in the figure, the temperature of the entire packaging was set at 90 to 95°C, and dispensing was repeated at a 1-minute cycle for the same nylon raw material. ~ Once every 5 days, mixer replacement frequency is once every day
It was revealed that the present two-liquid mixing and discharging device has excellent maintainability and that raw material loss is small.

(Effects of the Invention) As explained in detail below, the two-liquid mixing and discharging device according to the present invention is capable of independently controlling the temperature of the liquid tank, valve device, and mixer. It has become possible to control temperature to suppress oxidation, resulting in a significant reduction in the frequency of cleaning and mixer replacement.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the structure of a two-liquid mixing and discharging device according to the present invention, and FIG. 2 is a cross-sectional view showing an example of the structure of a conventional two-liquid mixing and discharging device. 1.2.3 ... Liquid tank 5 ... Valve device 6 ... Plunger pump 7 ... Mixer 21 ... Liquid tank 22.23 ... Electric heater 24 ... Oil liquid patent applicant Toyota Auto Heavy Industries Co., Ltd. Agent
Patent Attorney Yumi Kaede (and 2 others) No. 1 Figure 1.2.3 Liquid Yu〉7 5 Cell 1 6 Plunge child claw゛〉Def Three major wars 21〕Circulation

Claims (1)

[Claims] (1) A liquid tank that individually stores the two liquids, a valve device that switches the liquid pumped from each liquid tank between the circulation side and the discharge side, and the two liquids pumped through the valve device are mixed. A two-liquid mixing and discharging device equipped with a mixer, characterized in that the liquid tank is housed in a liquid tank in which heated fluid circulates, and that the valve device and the mixer each have independent heating means built-in. Two-liquid mixing and discharging device.