JPH01263012A - Continuous 2-liquid mixer - Google Patents

Abstract

PURPOSE:To mix two liquids uniformly at a high speed even in case of fluids having high viscosity by agitating the fluids by steady and dynamic agitating blades, and pouring other fluid from an inlet formed at the steady blade in the center of the agitated fluid. CONSTITUTION:Resin fed under pressure from a supply passage 12 is supplied from an inlet 14 into a cylindrical vessel 10, and fed to an outlet 15 under the pressure of the resin sequentially fed under pressure. On the other hand, a curing agent is poured from a pouring inlet 28 into the center of the resin, the resin and the agent are agitated by a steady agitating blade 18 and a rotating dynamic agitating blade 24 to be mixed. The resin and the agent so poured as to be spirally poured into the interior of the resin are gradually finely sheared by the blades 18, 24, the agent and the resin are diffused each other to be uniformly mixed at a high speed.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to synthetic resins and solvents in a fluid state.

This invention relates to a continuous two-liquid mixing device that continuously mixes two types of fluids such as curing agents.

[Conventional technology and its problems]

Two-component curable resins are often used to mold molded products such as resin films and sheets, and examples of these two-component curable resins include epoxy, urethane, phenol, polyimide, and unsaturated polyester.

When these two-component curable resins are mixed with a curing agent, for example, a resin, they gradually react, the viscosity increases, and curing begins), eventually making it impossible to mold the resin. The time from when these two liquids are mixed until they can no longer be molded is called the pot life (pot life), and the bond life can be longer or shorter depending on the temperature, the mixed concentration of the two liquids, etc. Therefore, if the two liquids are mixed unevenly, for example, the part with a high concentration of hardening agent will harden quickly, and the part with a low concentration will harden gradually. This means that the resin will be present locally. In addition, even if the two liquids are mixed uniformly, if the mixed liquid stagnates locally inside the mixing device, the pot life may be exceeded or the curing may progress more than other parts, resulting in a mixture with different properties. The result is a mixture of liquids.

If there is a hardened resin part in such an unhardened mixed resin liquid, it may appear as foreign matter in the resin molded product, or
In order to reduce the characteristic values, it is necessary for the mixing device to mix the two liquids uniformly and quickly, and to prevent the mixed liquid from stagnation inside the device.

Conventionally, such a mixing device is equipped with static stirring blades and dynamic stirring blades, and the resin is stirred while flowing from the inlet to the outlet of the cylindrical container, and the resin is stirred from the inlet provided on the side wall of the cylindrical container. Continuous mixing devices have been provided that mix the resin and the curing agent by injecting the curing agent.

In this conventional device, when there is no difference in the viscosity of the two liquids to be mixed, the two liquids are mixed uniformly, but when the viscosity is several 1
If there is a difference in viscosity, such as a resin of 000 poisc and a curing agent of several tens of poise to several poise, they can be easily mixed. It is gradually mixed with the resin while flowing over a certain range while being separated from the resin. Since the concentration of the curing agent is high in this certain range, curing is locally accelerated, causing the above-mentioned problem. On the other hand, when the rotational speed of the dynamic stirring blade is increased in order to mix quickly, the temperature of the liquid 8 rises (due to the generation of Joule heat, etc.), and there is a problem that the pot life is shortened.

[Means for Solving the Problems] The present invention has been made to solve these problems, and the gist of the continuous two-liquid mixing device according to the present invention is as follows: (a) a flow at one end; a cylindrical container having an inlet and an outlet at the other end; (b) a plurality of static agitation blades arranged on the same circumference and protruding approximately radially inward in a plurality of rows on the inner surface of the cylindrical container; (c) an inlet formed on the static stirring blade on the inlet side and opening approximately radially inward; (d) an inlet housed in the cylindrical container and rotating on the same axis; (8) a stator blade row of static stirring blades, in which a plurality of dynamic stirring blades on the same circumference and protruding approximately radially outward are arranged on the outer surface of the rotor and on the inner surface of the cylindrical container; The fluid supplied from the inlet side is pumped to the outlet side while being stirred and mixed in the cylindrical container. Another feature of the present invention is that the other fluid is injected into the body from the injection port into the inside of the fluid being stirred.

(Function) According to the device of the present invention, a rotor equipped with a rotor blade row consisting of a plurality of moving stirring blades is rotated inside a cylindrical container equipped with a stator blade row consisting of a plurality of static stirring blades. A fluid is supplied from an inlet provided at one end of the cylindrical container, and the fluid is pumped while being stirred by a static agitation blade and a dynamic agitation blade to an outflow port provided at the other end. On the other hand, since another fluid is injected into the stirred fluid from the injection port provided on the static stirring blade on the inlet side, the swirling flow of the fluid causes
It looks like it was injected spirally.

Since the other injected fluid is covered with the fluid pumped from the inlet, the other fluid itself does not come into contact with the outer wall of the rotor or the inner wall of the cylindrical container. Therefore, the injected other fluid is sequentially finely sheared and stirred by the static stirring blade and the dynamic stirring blade together with the fluid supplied from the inlet, and the injected other fluid is mixed with the fluid supplied from the inlet. After rapid internal mixing, both fluids are pumped to the outlet while being uniformly mixed.

〔Example〕

Next, embodiments of the present invention will be described in detail based on the drawings.

In FIGS. 1 and 2, reference numeral 10 is a cylindrical container of a continuous two-liquid mixing device, and at one end of the cylindrical container 10 there is an inlet 14 through which the resin pressure-fed from the supply path 12 is supplied. is arranged, and a nozzle-shaped outlet 16 is provided at the other end.
is installed.

On the inner surface of the cylindrical container 10, a plurality of cylindrical static stirring blades 18 protruding approximately radially inward are arranged at approximately equal intervals on the same circumference, and are arranged on the same circumference. Stator blade rows 20 each consisting of a plurality of static stirring blades 18 are arranged in multiple rows (multiple stages).

A rotor 22 that is rotated on the same axis as that of the cylindrical container 10 is housed inside the cylindrical container 10, and the rotor 22 is rotationally driven by a drive device (not shown). On the outer surface of the rotor 22, a plurality of dynamic stirring blades 24 protruding approximately radially outward are arranged on the same circumference at approximately equal intervals, and a plurality of dynamic stirring blades 24 are arranged on the same circumference. A rotor blade row 26 consisting of 24 is connected to the cylindrical container 1.
They are arranged in multiple rows (multiple stages) so as to alternate with the stator blade rows 20 arranged on the inner surface of the stator vanes.

The dynamic stirring blades 24 are formed by cutting a disc, for example, and then fixed to the outer periphery of the rotor 22 by press-fitting, shrink-fitting, etc., or in the case of a small size, the dynamic stirring holes 24 and the rotor 22 are integrally formed. You can also.

Therefore, the 1" blade row 26 is the stator blade row 20 and the stator blade row 20.
together with the rotor 22.

One of the blades 18 of the static stirring 11 disposed on the side of the inlet 14 of the cylindrical container 10 is formed with an inlet 28 that opens approximately radially inward, and the center of the cylindrical container 10, that is, the cylinder The shaped container 10 and the rotor 22 are formed together! The curing agent is injected into the center of the +1 fat flow path. The other end of the inlet 28 is connected to a pump (not shown) via a check valve 30, and the cylindrical container 1o
The pressure inside prevents the resin from flowing back into the injection port 28.

An outer cylinder 32 is attached to the outside of the cylindrical container 10, and a fluid such as a refrigerant is flowed between the outer cylinder 32 and the cylindrical container 1.0 to keep the cylindrical container 1o at a constant temperature. It is made to sag. Note that the reference numeral 34 is a mechanical seal, which prevents the wood+1t7 fed from the supply path 12 from leaking from between the cylindrical container IO and the shaft 36 of the [7-tar 22].

In a continuous two-liquid mixing device having such a configuration,
The resin fed under pressure from the supply channel 12 is supplied into the cylindrical container lO from the inlet 14, and is sequentially pumped (by the pressure of the resin, it flows to the outlet 16-).On the other hand, from the inlet 2 The hard cutting is injected into the center of the resin, and the resin and curing agent are stirred and mixed by the static stirring tube 18 and the rotating dynamic stirring tube 24.The viscosity of the resin is, for example, about several thousand poise. On the other hand, the viscosity of the curing agent is about several ρoise - several 10 -'poise.Two liquids with such a large viscosity difference are difficult to diffuse;
Not easily mixed. Moreover, since the resin with high viscosity does not cause a large flow against the stirring force of the dynamic stirring blades 24, -
The two liquids cannot be mixed easily. However, in the continuous two-component mixing device according to the present invention, the curing agent is injected into the resin flowing while swirling inside the cylindrical container 10 from the injection port 28 formed in the static stirring 1'l' blade 18. Because of this, it looks as if it was injected in a spiral pattern. Since the injected curing agent is covered with resin, it is not brought into direct contact with the outer wall of the rotor 22 or the inner wall of the cylindrical container 10.

The resin and the hardening agent, which appears to be injected into the resin in a spiral shape, are gradually sheared into fine pieces by the static stirring blades 18 and the dynamic stirring blades 24, and the hardening agent and the resin diffuse into each other quickly and uniformly. mixed with In addition, when the viscosity of the two liquids is low, the radial flow due to centrifugal force is further accompanied, and the two liquids are mixed more quickly and uniformly. In addition, since the two liquids that have been mixed are sequentially discharged from the outlet 16 while being constantly stirred by the dynamic stirring blades 24, the two liquids that have been mixed do not remain inside the cylindrical container 10.

Although one embodiment of the continuous two-liquid mixing device according to the present invention has been described above in detail, the present invention is not limited to the above-described embodiment, and can be implemented in other forms.

For example, as shown in FIG. 3, the tip of the static stirring blade 38 on which the injection port 28 is formed is placed so that the opening of the injection port 28 is in the same direction as the rotational direction of the rotor 22 and the rotor blade row 26. It may also be formed diagonally.

According to this example, the resin rotated in the circumferential direction by the dynamic stirring blade 24 does not directly hit the opening of the injection port 28, and the curing agent is smoothly injected from the injection port 28. Become.

Further, as shown in FIG. 4, there may be not only one injection port 28 but a plurality of injection ports 28. It is also possible to simultaneously inject the two into the cylindrical container 10. In this way, the curing agent can be divided and evenly diffused into the cylindrical container 10, and the curing agent can be mixed more evenly, making it possible to downsize the apparatus.

Next, in the mixing device according to the present invention, the cylindrical container 10
As shown in FIGS. 1 and 2, the two mixed liquids flowing through the inner wall of the cylindrical container 10 while being stirred and mixed by the stator blade row 20 and the rotor blade row 26.

The air flows through a flow path formed by the outer wall of the rotor 22, the stator blade row 20, and the rotor blade row 26. The cross-sectional area of this flow path is formed so as to become narrower continuously or stepwise from the inlet 14 side to the outlet 16 side, thereby affecting the flow rate of the two mixed liquids and/or the mixed two liquids. It can be configured to vary the shear force.

In this way, not only can further agitation be expected due to the increase in flow velocity combined with the agitation action by the stationary blade row 20 and the rotor blade row 26, but also when the pot life of the mixed two liquids is short, the By shortening the residence time, the mixed two liquids can be supplied to the molding device immediately after mixing. Also,
In this example, when the viscosity of the mixed two liquids is reduced by mixing the two liquids, it is possible to keep the shearing force applied to the mixed two liquids substantially constant.

As an apparatus for carrying out this mixing method, in FIG.
By decreasing the clearance between the stationary blade row 20 and the rotor blade row 26 continuously or stepwise from the inlet 14 side to the outlet 16 side of the cylindrical container IO, the flow path for the mixed two liquids is created. It is possible to configure the cross-sectional area to be narrowed continuously or stepwise.

Further, as shown in FIG. 5, the inner diameter of the cylindrical container 42 may be made smaller from the inlet 14 side to the outlet 16 side, so that the cross-sectional area of the flow passage becomes gradually narrower. Alternatively, as shown in FIG. 6, the outer diameter of the rotor 44 may be increased from the inlet 14 side to the outlet 16 side, and the cross-sectional area of the flow passage may be similarly gradually narrowed.

Furthermore, contrary to the top stripping method, it is also possible to configure the cross-sectional area of the flow path through which the two mixed liquids flow to widen continuously or stepwise.

For example, as in the previous example, the clearance between the stationary blade row and the rotor blade row may be made smaller near where the curing agent is injected to increase the shearing force that is applied to the two mixed liquids, and the clearance may be increased thereafter. (Conversely, it can be configured to weaken the shearing force.)

Further, as shown in FIG. 7, the inner diameter of the cylindrical container 46 is increased from the inflow port 141!1.1 toward the outflow port 16, so that the cross-sectional area of the flow path is gradually widened. or, although not shown, the rotor 2
The outer diameter of No. 2 may be gradually reduced.

In this way, by narrowing the cross-sectional area of the flow path near where the curing agent is injected, the shearing force acting on the two liquids is increased, allowing the two liquids to mix quickly, and the cross-sectional area of the flow path is then widened. By weakening the shearing force acting on the two mixed liquids, the two liquids can be blended together. In addition, in this example, when the viscosity of the mixed two liquids increases by combining 11 of the two liquids, the shearing force acting on the mixed two liquids is gradually weakened, so that an almost uniform force is applied to the mixed two liquids as a whole. You can make it work. Furthermore, by increasing the residence time of the mixed two liquids, it becomes possible to efficiently cool them within the mixing device and supply them to the molding device.

Next, as shown in FIG. 8, the outer diameter of the rotor 48 is increased over a certain range, and the cross-sectional area of the flow passage is narrowed <L(
50), the two liquids can be mixed while being rapidly sheared by a high shearing force in the reduced portion 50, and then the mixed two liquids can be blended at a location where the cross-sectional area of the flow path is wide.

Furthermore, as shown in FIG. 9, it is also possible to provide an enlarged diameter portion 56 in which the outer diameter of the rotor 52 and the inner diameter of the cylindrical container 54 are enlarged.

In this way, the circumferential speed of the dynamic stirring blades 58 in the enlarged diameter portion 56 can be increased, and after the two liquids are finely sheared and rapidly mixed in a short time, the peripheral speed of the dynamic stirring M60 is slow. The two liquids can be mixed in the reduced diameter portion 62 and can be efficiently cooled. In this example, the cross-sectional area of the flow passage may be constant for both the enlarged diameter portion 56 and the reduced diameter portion 62.

Other than that, static stirring! (It is also possible to gradually increase or decrease the volume of the 18 and/or the dynamic stirring blades 24 to decrease or increase the flow passage cross-sectional area, and the cylindrical container is not limited to a cylinder but may also be polygonal. Also good.

Alternatively, the static stirring blade in which the injection port is formed may be configured to be movable in the radial direction so that the curing agent injected from the injection port can be injected into any position inside the resin. . Incidentally, the static stirring blade in which the injection port is formed may not function as a stirring blade, and regardless of its name, it should protrude inside the cylindrical container so that the curing agent can be injected into the resin. refers to something that

Above, the embodiment of the present invention has been described using a two-component curing resin as an example, and an example in which the curing agent is injected from the injection port.
It can be used when continuously mixing two l(k) such as n materials, in which case the one with the smaller volume of the two liquids to be mixed is selected as the fluid injected from the injection port.

In addition, the present invention allows the shapes of the static stirring blades and dynamic stirring blades to be elliptical cylinders or streamlines, and furthermore, the above-mentioned embodiments can be combined as appropriate. Various modifications, improvements, and modifications can be made within the scope of the invention based on the knowledge of those skilled in the art without departing from the scope.

〔Effect of the invention〕

According to the present invention, a fluid is stirred by a static stirring blade and a dynamic stirring blade, and another fluid is injected into the center of the stirred fluid from an injection port formed in the static stirring blade. Because of this structure, the other injected fluids are covered by the fluids pumped from the inlet and do not come into direct contact with the outer wall of the rotor or the inner wall of the cylindrical container, and the swirling flow of the fluids is prevented. As a result, the other fluid appears to be supplied in a spiral manner, so that both fluids are finely sheared and mixed by the stirring blade 1↑. Therefore, even if the fluid has a particularly high viscosity, two liquids can be quickly and uniformly combined by rIZ.

In addition, the cross-sectional area of the fluid flow path may be made gradually narrower from the inlet side to the outlet side of the cylindrical container, or conversely widened (formed) to increase the flow rate of the two liquids and their mixing. Since the shearing force acting on the two liquids is changed appropriately, it can be adjusted to correspond to the viscosity of the two liquids, the bot life, etc.
It is possible to arbitrarily set the residence time of the mixed two liquids in the mixing device, the applied shearing force, etc.

Therefore, in the case of a two-component curing resin, there is a hardened or semi-hardened state in the uncured resin that occurs due to uneven mixing or when some mixed resin remains in the cylindrical container and curing progresses. The present invention has excellent effects, such as being able to eliminate the situation in which resins are mixed.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a main part of a continuous two-liquid mixing device according to the present invention, and FIG. 2 is a plan sectional view of FIG. 1. 3 to 9 are diagrams showing other embodiments of the present invention, respectively, in which FIG. 3 is a plan sectional view of the main part, FIG. 4 is a plan sectional view, and FIGS. , Figures 7, 8 and 9
Each of the figures is a front sectional view of the 'v section. 10.42.4G, 54; Cylindrical container 14; Inlet 16; Outlet 18.38; Static stirring 1 main blade 20; Stationary blade row 22.44, 48.52; Rotor 24.58, 60; Dynamic stirring blade 26; Moving blade row 28; Inlet 56; Expanded diameter portion Patent applicant Kanekabuchi Chemical Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (6)

[Claims] (1) A cylindrical container having an inlet at one end and an outlet at the other end, and a plurality of rows of static stirring blades on the same circumference and protruding approximately radially inward on the inner surface of the cylindrical container. an inlet formed on the static agitation blade on the inlet side and opened approximately radially inward; and a rotor housed in the cylindrical container and rotated on the same axis. , a plurality of movable stirring blades on the same circumference and protruding approximately radially outward are arranged on the outer surface of the rotor, alternating with rows of static stirring blades arranged on the inner surface of the cylindrical container. , and a plurality of rows of rotor blades, the fluid is supplied from the inlet side and is being agitated and mixed in the cylindrical container while being pumped to the outlet side. 1. A continuous two-liquid mixing device, characterized in that the fluid is injected into the fluid being stirred. (2) In the continuous two-liquid mixing device according to claim 1, a flow path constituted by the cylindrical container, a stator blade row, a rotor, and a rotor blade row from the inlet side to the outlet side. A continuous two-liquid mixing device characterized by being formed to have a narrow cross-sectional area. (3) The cross-sectional area of the flow passage is gradually narrowed by decreasing the clearance between the cylindrical container, the stator blade row, the rotor, and the rotor blade row from the inlet side to the outlet side. The continuous two-liquid mixing device according to claim 2, characterized in that it is formed as follows. (4) In the continuous two-liquid mixing device according to claim 1, the flow path is constituted by the cylindrical container, the stator blade row, the rotor, and the rotor blade row from the inlet side to the outlet side. A continuous two-liquid mixing device characterized by being formed to have a wide cross-sectional area. (5) The cross-sectional area of the flow passage is gradually widened by increasing the clearance between the cylindrical container, the stator blade row, the rotor, and the rotor blade row from the inlet side to the outlet side. The continuous two-liquid mixing device according to claim 4, characterized in that it is formed as follows. (6) The continuous two-component mixing device according to claim 1, characterized in that the rotor and the cylindrical container are provided with enlarged diameter portions whose outer and inner diameters are enlarged. .