JP2930392B2 - Improved collision mixing type mixing module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention discharges a liquid A and a liquid B of a two-liquid mixed-curable resin such as urethane, epoxy, and unsaturated polyester from a discharge port, and mixes them by a collision mixing method. A mixing module of the collision mixing type used for spraying or injection molding (A
This part improves the mixing characteristics and stabilizes the physical properties, and the spray condition in the case of spray molding. (Pattern).

In the present specification, the liquid A indicates one liquid of the two-liquid mixed-curable resin, and the liquid B indicates the other liquid.

[Prior art] When molding a two-component fast-curing material having a high reaction rate,
Usually, a collision mixing method is used. This is because mechanical mixing and static mixing do not have sufficient time for cleaning the mixing chamber due to the rapid reaction. The impingement mixing method has the characteristic that the mixing chamber can be cleaned by ejecting the mixed liquid after ejecting the liquid mixture, and the cleaning can be performed in a short time by using a method using a rod or a solvent or by using a solvent or air. Become
The physical properties of the product may vary. This is because the mixing by this method mainly depends on the rotational motion of the liquid by adjusting the pressure at collision and the discharge angle of the liquid, so when the material has a high liquid viscosity or when the collision pressure is low, mixing of the two liquids is sufficient. It is considered that the physical properties of the product do not vary. Further, when the mixing ratio of the liquid A and the liquid B is different, the amount discharged into the mixing chamber is different, so that the larger the difference in the mixing ratio, the lower the mixing efficiency. In the case of injection molding, there is not much problem. However, in the case of spray molding, the spray condition (mist concentration distribution, mist particle size, pattern shape, etc.) is important, and the workability and the surface condition of the product are large. affect.

Conventional mixing heads can be classified according to the cleaning method. An example of the solvent cleaning method is a # 43P gun manufactured by Binks USA. This gun is liquid A and B
In this method, separate parts having one circular hole as liquid orifices are attached at both sides at 180 degrees, discharged into a relatively large-diameter mixing chamber, and subjected to collision mixing. The problem with this method is that the number of holes is only one, and the orifice for the liquid is a separate part, so that the diameter of the mixing chamber becomes large and the mixing efficiency decreases. Therefore, it is mainly used for low-viscosity paints containing a high proportion of solvents.

Mixing is not sufficient with high viscosity liquids, so it is necessary to attach a static mixer to the tip of the # 43P gun and mix again. However, materials with a short curing time cannot be used because cleaning time is not sufficient.

An example of the air cleaning method is a prober gun manufactured by Glasscraft of the United States. This gun is a module with a mixing chamber and a nozzle integrated with one orifice on each side for liquid A and liquid B, and discharges linearly from the upper and lower holes of the mixing chamber. It has a structure. The problem with this gun is that each orifice is at a 180 °
In addition to the single orifice, the liquid has orifices in the upper and lower portions of the mixing chamber, so that the liquid has a spiral shape and is ejected through the nozzle as it is.
Therefore, even when the liquid is ejected, the liquid remains rotated, and when spraying, the spray condition (pattern) is deformed and a difference occurs in the concentration distribution. In order to maintain the spray condition properly, it is necessary to slightly change the position where the mixing chamber is retracted.

Examples of the cleaning method for mechanically moving the rod in and out include D-Gun, GX-7 Gun of Gasmer, and Toho Kikai, Klaus Muffie, and Canon, which are used in RIM (reaction injection molding). is there. In the case of the D gun, there is one rectangular hole on each side of the integrated mixing chamber, and the two liquids are discharged straight to the top and bottom of the mixing chamber, and are discharged into the mixing chamber. The liquid is mixed and ejected while swirling, and is used for spraying or pouring. The problem with this gun is that the number of holes is one each, and it has the same problem as the prober gun. That is, a density difference easily occurs in the spray pattern, and it is necessary to change the length of the mixing chamber by changing the retreat position of the cleaning rod every time the spraying operation is performed.

In the case of the GX-7 gun, the structure of the mixing module is integrated, the discharge position of the liquid is determined accurately, and the discharge position of the two liquids is also the front part and the rear part. Are parallel and perpendicular to the jetting direction. The biggest drawback is that the two liquids do not directly collide with each other, which causes a problem in the mixing characteristics. As the viscosity of the raw materials used increases, the mixing properties become very poor, and the physical properties of the molded product deteriorate. Tend to.

The head used for RIM molding is usually a machine-cleaning type and has one orifice on each side. In order to improve the mixing characteristics, the mold side must be equipped with an after-mixer, film gate, etc. A mixing auxiliary device is used.

[Problems to be solved by the invention]

When the liquids A and B of the two-component mixed-curable resin such as urethane, epoxy, and unsaturated polyester are discharged from the discharge port and sprayed or injected by the collision mixing method, the conventional mixing method as described above has various types. Due to the drawbacks, the present inventors have wide compatibility with the compounding ratio of the materials, can use even high-viscosity materials, and have good mixing characteristics of the two liquids even when the collision pressure is low, and the physical properties of the cured product are poor. There is no variation, and the spray condition (mist concentration distribution,
Atomization state such as mist particle size and pattern shape)
Considered to design the structure of a good mixing module.

[Means for solving the problem]

When mixing two liquids by the collision mixing method, the factors affecting the mixing efficiency are (1) Reynolds number (dimensional dimension determined by the size of the apparatus / kinematic viscosity of the liquid / fluid velocity / density of the liquid)
(2) Distance at which the two colliding liquids are discharged (diameter of the mixing chamber) (3) It is considered that rotation of the two liquids is the main one. However, when the material (liquid viscosity) and the discharge amount cannot be changed, improving the mixing efficiency is greatly restricted. As a result of intensive studies on a method of improving the mixing characteristics by the collision mixing method, it was found that the above-mentioned drawbacks were greatly improved by changing the mixing module to the following design. That is, the mixing chamber portion where the raw material A and the liquid B collide is a module of an integrally formed body. (1) The liquid A and the liquid B each have two or more discharge ports (orifices); The ratio of the total opening area of the discharge ports of the solution A and the solution B is within ± 50% of the mixing ratio of the solution A and the solution B. (3) Both or one of the solution A and the solution B is located at the center of the mixing chamber. (4) A collision-mixing type mixing module having a structure in which the liquid A and the liquid B are discharged into the mixing chamber at a direction in which the two liquids directly collide with each other.

It is considered that the reason why the mixing characteristics were improved is a combined effect of the following items. (1) The collision energy can be used by increasing the possibility that the two liquids collide directly. (2) By providing two or more small-diameter discharge ports, the discharge pressure is ensured and the liquid is subdivided to increase the chance of contact between the two liquids. (3) 2
By making the mixing chamber portion into which the liquid is discharged and mixed into an integrated structure, the position and angle of the discharge port are strictly determined, and mixing is always performed under constant conditions. (4) In the case of spray molding, in order to secure a favorable spray pattern, it is possible to suppress the rotational movement of the liquid by directly colliding the two liquids or rotating and mixing only the deformed side. It has become possible to always obtain a constant spray condition without adjusting the size of the chamber.

The impingement mixing agitator having the structure according to this design can be used for the spray head, the casting head head, the nozzle at the tip for injection, and also for the RIM. The cleaning method may be any of mechanical cleaning using a rod, air cleaning, and solvent cleaning.
However, in view of the sealing property of the liquid and the control of the spray pattern, the mechanical design by taking the rod in and out is highly flexible and most suitable. The liquid to be used can be changed from a circulation type to a one-way type, and the size can be reduced to a hand-held gun type.

Table 1 summarizes the spray heads and mixing chambers of each company.

As an example of the high-pressure two-liquid ejection machine used for the molding of the present invention, any type can be used without particular limitation as long as it can increase the liquid pressure to a high pressure of about 100 kg / cm ² . Practical examples include THD-2K manufactured by Toray Engineering Co., Ltd. using a gear pump as a pump, NR-230 high-pressure polyurethane foaming machine manufactured by Toho Machinery Co., Ltd. using an axial piston pump, and Gasmer Co., Ltd. using a plunger pump (US ) H-2000, T-3H from Glasscraft (USA)
And so on.

〔Example〕

 Hereinafter, the present invention will be described with reference to examples.

(Explanation of phrases) (1) Tack-free time: The shortest time during which the surface of the sprayed or injected material is lightly touched with a finger and the material does not transfer to the finger.

(2) Spray condition (pattern): The following items were visually observed and the results were shown.

・ Concentration distribution: concentration difference of particles ejected from the gun, straining, etc. ・ Particle size: size of particles ejected from the gun, confirmation of atomization status ・ Shape: shape, deformation of ejected material sprayed on the target (3) Surface properties: Spray-molded to a thickness of about 2 mm on a polypropylene plate, and the smoothness of the surface and the presence or absence of pinball were examined.

(4) Physical property test: Measurement was performed after curing for one week at 23 ° C. and 55% humidity in accordance with JIS K-6301. (Molding material) A rim spray (a quick-curing two-part urethane spray material manufactured by Mitsui Toatsu Chemicals) was used. Next 2 with different blending ratio and viscosity
Brand used.

(High-pressure two-liquid discharge machine) H-2000 type manufactured by Gasmer Corporation of the United States is used. This machine is a one-way type that hydraulically drives a single-shaft, double-action plunger pump, and can be used for injection and spraying. The fluid pressure can be raised up to 2000psi (about 140kg / cm ² )
The liquid temperature can be set separately for the liquid A and the liquid B.

Hereinafter, the present invention will be described in detail with reference to the drawings and embodiments.
1 and 2 are a sectional view and a front view, respectively, showing the configuration of the improved GX-7 gun mixing module used in Example-1. FIGS. 3-1 to 3-3 show Example-4, FIGS. 4-1 to 4-3 show Example-5, FIGS. 5-1 to 5-3 show Comparative Example-4, and FIGS. 6-1 to 6-3 show Comparative Example-5. 7 and 8 are perspective views and front sectional views of an improved mixing module for a prober gun used in Example-6. It is. In the figure, 1 is a mixing module, 2 is a valving rod, 1a is an inflow hole for liquid A, 1b is an inflow hole for liquid B, and 1c is an ejection hole for mixed liquid.

Example 1 A GX-7 gun of a mechanical cleaning method manufactured by Gasmer Co. was used as a spray head, and a mixing module newly designed by the present inventors was used. First structure
FIG. 2 and FIG. The schematic diagrams in Tables 3 to 5 show the discharge angles of the liquid A and the liquid B into the mixing chamber and the collision angles of these two liquids. As shown in FIGS. 1 and 2, the orifice for liquid A (isocyanate component)
Two holes are opened forward with the position of the hole at 180 degrees, and the orifice for liquid B (resin component) at the rear with the position of the hole at 90 degrees.
The two liquids were opened, and the respective discharge angles were on a line toward the center of the mixing chamber, and the directions were angles at which the two liquids collided directly. That is, the two liquids are designed to be mixed in a state where they directly collide with each other and do not generate rotational movement. The diameter of all the orifices was 0.406 mm, and the diameter of the mixing chamber was 3.175 mm. The material was a polyacetal resin (Delrin, a trademark of Du Pont) in consideration of the abrasion resistance and liquid sealing properties due to repeated use. A spray tip (# 212: fan-shaped pattern) was attached to the tip of the gun for molding. The raw material is Rim Spray PD-450 (Solution A: Solution B =
1: 2 volume ratio), the liquid temperature is 50 ° C for liquid A, 65 ° C for liquid B,
Pressure during ejection respectively the condition of 112 kg / cm ² and 120 kg / cm ^2. As a result, as shown in Table 3, the tack-free time was as fast as 9 to 11 seconds, and when the spray condition (pattern) was observed, the concentration distribution was uniform, the particle size was fine, and the shape was fan-shaped. The mold was normal and no deformation was observed. The surface of the molded product was smooth and no pinhole was observed. The curability was sufficient, and the physical property test results of the prepared sheet showed that all of the hardness, modulus, tensile strength, elongation and tear strength were excellent, and that the mixing properties were good.

Comparative Example-1 The spray head was GX-
Using 7 guns, the company's # 10 mixing module was used. The structure is schematically shown in Table 3, and the structure according to the same schematic drawing method as in Example 1 is shown in Table 3.
Table 3 shows the flow of the liquid. Two orifices for the main agent (isocyanate component) are open at the front and two orifices for the resin component are open at the rear. The discharge angles of each are perpendicular to the valving rod, and the two liquids are mixed in the mixing chamber. Is a structure in which the liquid is discharged in a parallel flow. Since the discharge direction of the liquid is on a line passing through the center of the mixing chamber, neither liquid is rotated. All orifices have a diameter of 0.914m
m. As shown in Table 3, the result of the molding test showed that the ejection amount of the mixed liquid was 5.2 kg / min, which was about 1.6 times that of Example 1. The spraying condition was fine with a fine particle size and a fan-shaped shape, but the concentration distribution was uneven at the edges and was uneven with streaks. The tack-free time was 9 to 10 seconds, which was equivalent to that of Example 1. However, in the physical property test results, all items were lower, and there was a difference in physical properties between the two sheets formed, and the fluctuation of the mixing characteristics. Was observed. Since the diameter of the orifice is larger than that of the mixing module prototyped in Example 1, the mixing efficiency is considered to be good from the viewpoint of the number of Reynolds nozzles.

Examples-2 and -3 The same spray head and raw material as in Example-1 were used, and only the "discharge pressure" of the molding conditions was reduced. As a result, even if the through-discharge pressure is lowered as shown in Table 3, the same spraying condition and surface properties as those of Example 1 are maintained, and the physical properties are almost the same or only slightly reduced. It has little pressure dependency, has stability against pressure drop, and has great practical advantages.

Comparative Examples 2 and -3 The same spray head and raw material as in Comparative Example 1 were used, and only the “discharge pressure” of the molding conditions was reduced to bring the mixing characteristics into a reduced state. As a result, as shown in Table 3, it was found that the spraying condition was further deteriorated due to a decrease in the discharge pressure, the physical properties were also reduced, and there was a defect in the mixing.
In particular, when the discharge pressure was set to about 70 kg / cm ² , tackiness was left on the entire sheet and poor curing occurred, and physical properties could not be measured.

Example-4 Using a GX-7 gun manufactured by Gasmer Co., the mixing property when the liquid discharged to the mixing chamber was rotated was examined. FIGS. 3-1 to 3-3 show schematic diagrams of the flow directions of the liquid A and the liquid B in the improved mixing module for the GX-7 gun. The liquid A (isocyanate component) discharged from the front part is shown in FIG. The position of the hole was set to 180 degrees, and the two holes were introduced linearly toward the center of the mixing chamber from the two holes. Liquid B (resin component) was introduced from the rear through four orifices opened at a position of 90 degrees. The liquid A was discharged at an angle such that the liquid was rotated so as to face the direction in which the liquid A was discharged. That is, the design is such that the liquid to be discharged is mixed in a state where only the liquid B discharged from the rear rotates and the liquid A discharged from the front does not rotate. The number and area of the orifices are all adjusted to the compounding ratio of the materials, as in Example-1. As the stock solution, Rim Spray PD-450 was used under the same conditions (liquid temperature, discharge pressure) as in Example-1. As shown in Table 4, the discharge rate was a medium discharge rate of 3.3 kg / min, and the curing / reactivity exhibited a tack-free time of 9 to 11 seconds, and showed good curability by rapid curing. Observation of the spray condition revealed that (1) the concentration distribution was uniform throughout, (2) the particle size was fine, and (3) the shape was fan-shaped and no deformation was observed. The results of the physical properties test were excellent in all of the items of hardness, modulus, tensile strength, elongation and tear strength, and were good results.

Example-5 Using a GX-7 gun manufactured by Gasmer, the setting conditions were as follows:
4 and FIGS. 4-1 to 4-3 are schematic diagrams of the flow directions of the A liquid and the B liquid in the mixing module. Liquid A (isocyanate component) discharged from the front
Was introduced from three orifices at an angle such that the liquid would rotate, and from the rear part, liquid B (resin component) was introduced linearly from six orifices toward the center of the mixing chamber. That is, the liquid to be discharged is designed to be mixed in a state where only the liquid A discharged from the front rotates and the liquid B discharged from the rear does not rotate. The number and area of orifices
Same as Example-4. As shown in Table-4,
As for the curing / reactivity, the tack-free time was 9 to 11 seconds, and the curing was fast and showed good curability. Observation of the spray condition revealed that (1) the concentration distribution was uniform throughout, (2) the particle size was fine, and (3) the shape was fan-shaped and no deformation was observed. The results of the physical properties test were excellent in all of the items of hardness, modulus, tensile strength, elongation and tear strength, and were good results.

Comparative Example-4 The used equipment and setting conditions were the same as in Example-4,
FIGS. 5-1 to 5-3 are schematic diagrams of the flow directions of the A liquid and the B liquid in the mixing module. The liquid A (isocyanate component) discharged from the front part was introduced at an angle such that the liquid discharged from the two orifices rotated from the two liquid orifices, and the liquid B (resin component) was discharged from the four orifices. The directions of rotation are the same, and the two liquids are mixed in a state where they rotate in the mixing chamber. The number and area of the orifices were the same as in Example-4. As a result, as shown in Table-4, the tack-free time of the curing / reactivity was 9 to 11 seconds. However, when the spray condition was observed, (1) the density distribution was non-uniform with a dark portion at the end and the thickness changed when molding was performed. (2) The particle size was fine and good, but (3) the spray shape was twisted (deformed), and the spraying operation was extremely difficult, and there was a problem with the thickness control and yield of the compact. As a result of the physical property test, although the hardness was developed, the modulus, tensile strength, elongation and tear strength were lower than those of Examples -4 and -5 in all items.

Comparative Example-5 The equipment and setting conditions used were the same as in Example-4.
FIGS. 6-1 to 6-3 show schematic diagrams of the flow directions of the A liquid and the B liquid in the mixing module. The liquid A (isocyanate component) discharged from the front part was introduced at an angle such that the liquid discharged from the two orifices rotated from the two liquid orifices, and the liquid B (resin component) was discharged from the four orifices. The direction of rotation is reversed, and the two liquids are mixed in a state where the rotational movement is suppressed in the mixing chamber. The number and area of the orifices were the same as in Example-4. As can be seen from the test results, as shown in Table 4, the tack-free time of the curing / reactivity was 9 to 11 seconds. However, when the spray condition was observed, (1) the density distribution was non-uniform with a dark portion at the end and the thickness changed when molding was performed. (2) The particle size was fine and good, but (3) the spray shape was twisted (changed), and the spraying operation was extremely difficult, and there was a problem in thickness control and yield of the molded product. As for the physical property test results, although the hardness is expressed, the modulus, tensile strength, elongation and tear strength are all items of Example-4.
And -5.

Example -6 A mixing module using a prober gun manufactured by Glasscraft as an air-cleaning (cleaning) type gun was prototyped. This gun slides the mixing chamber with an orifice back and forth to discharge and stop the liquid, but has three holes on each side, and the liquid discharge angle is all It was linear toward the center. The structure is shown in FIG. 7 and FIG. That is, the liquid to be discharged is mixed in a situation where the linear collision mixing is performed from both sides. The number and area of the orifices are the same and the same area according to the mixing ratio of the materials, and the diameter is 0.45 mm and the total area is 0.447 mm ²
And As shown in Table 4, the discharge rate was 3.9 kg / min, a medium discharge rate, and the curing / reactivity was tack-free.
The time was 12 to 14 seconds, showing good curability with fast curing. Observation of the spray condition revealed that (1) the concentration distribution was uniform throughout, and (2) the particle size was medium to fine and no spray chip was used. . (3) The shape was round and no deformation was observed. The results of the physical property tests were excellent in all of the items of hardness, modulus, tensile strength, elongation and tear, and were good results.

Comparative Example-6 Mixing module of Glasscraft (No.R # 1:
(A round type without using a chip) was used, and the same machine, raw materials and setting conditions were used as in Example-6. R #
The flow direction of the liquid in one chamber has one orifice on each side as shown in Table-4.
The discharge angle of the liquid is such that the liquid A and the liquid B are introduced in a rotating direction in the mixing chamber.
As in 6, the liquid to be discharged is agitated and mixed in a state where the liquid is directly impacted and mixed from both sides. The number and area of the orifices were 1: 1 and the diameter was 0.80 mm. As can be seen from Table 4, the discharge rate was slightly higher at 4.4 kg / min, and the curing / reactivity showed a tack-free time of 12
It showed good curability with fast curing of about 14 seconds. Observation of the spray condition revealed that (1) the concentration distribution was uniform throughout, (2) the particle size was large, and when the sheet was formed, the surface was poor and the surface was uneven, and there were pinholes. It is not suitable for applications that place importance on. (3) The shape was round and no deformation was observed. Physical property test results
All of the items of hardness, modulus, tensile strength, elongation and tear strength were lower results.

Comparative Example-7 Binks 43P gun was used. This gun is of the type that uses an orifice directly attached to the mixing chamber instead of the mixing module. Machine,
The raw materials and setting conditions were the same as in Example-6. The structure of this gun has one orifice on each side of the mixing chamber as shown in Table-4, and all liquid discharge angles are introduced linearly toward the center of the mixing chamber. Has become. The diameter of the orifice can be arbitrarily set separately, but the number is limited to one.
This time, the compounding ratio of the materials was the same as in Example-6, and the caliber was 0.
89 mm. Spray tip (030-45:
The test was carried out with a 0.030 inch caliber and a fan-shaped spread angle of 45 degrees. As can be seen from Table 4, the discharge rate was slightly lower at 2.4 kg / min, and the curing / reactivity had a tack-free time of 16 to 22 seconds and the curability was slightly lowered. Observation of the spray condition revealed that (1) the concentration distribution was uniform throughout, (2) the particle size was fine, the surface of the sheet was smooth and good, and (3) the shape was fan-shaped and no deformation was observed. However, the results of the physical property test showed that all of the items of hardness, modulus, tensile strength, elongation and tear strength were considerably low, and that stirring and mixing were not sufficiently performed.

Comparative Example-8 Mixing module (52L) for D-Gun manufactured by Gasmer
Was used. Table 4 schematically shows the flow direction of the liquid discharged from the mixing module. This structure is an integrated structure and has one rectangular orifice on each side on each side. The orifice size is 0.3 × 3 mm, and discharge is performed in the direction that rotation in the same direction occurs in a cylindrical mixing chamber that is machine-cleaned. The spray tip cannot be attached to the tip of the gun. The machine body and raw materials were the same as in Example-6, but the setting conditions were that the withstand pressure of this gun was
Because of 70 kg / cm ² , it was lowered and set at the upper limit of pressure resistance. As a result, as shown in Table 4, the discharge rate was a medium discharge rate of 3.2 kg / min, and there was no particular problem in the curability as the tack-free time was 11 to 13 seconds. As a result of observing the spray condition, (1) the density distribution was partially uneven and uneven. (2) The particle size was very large, the smoothness of the sheet was poor, and there were also many pinholes, which was worse than when the prober gun of Comparative Example-6 was used and was not practical. (3) The shape was round and deformed.
This gun was able to change the length of the mixing chamber by adjusting the position of the rod, but was tested, but the deformation and concentration distribution were not improved. The results of the physical property tests were such that all of the items of hardness, modulus, tensile strength, elongation and tear strength were considerably low, and stirring and mixing were not sufficiently performed.

Example -7 Using a GX-7 gun manufactured by Gasmer Co., Ltd., the spraying conditions and physical properties were examined when the spray was set at a low temperature and the viscosity of the stock solution was high. As shown in Table 5, the design of the mixing module discharges liquid A (isocyanate component) from two circular orifices from the front part, and the liquid is introduced linearly toward the center of the mixing chamber.
The resin component was introduced from the rear through two circular orifices in the same manner as in the solution A. That is, the design is such that the liquid to be discharged is mixed in a state in which neither the front part nor the rear part rotates. The number and area of the orifices were the same as in Example-4. Tack-free time for curing / reactivity is 13 ~
Good curability was shown by quick curing in 15 seconds. Observation of the spray condition revealed that (1) the concentration distribution was uniform throughout, (2) the particle size was fine, and (3) the shape was fan-shaped and no deformation was observed. As shown in Table 5, the physical property test results were excellent in all items of hardness, modulus, tensile strength, elongation and tear strength. Even if the temperature of the stock solution was increased, the surface properties of the molded product and This indicated that the mixing properties were good without any influence on the physical properties.

[Effect of the Invention] In the method of mixing the two-component type fast-curing material by collision mixing, the mixing chamber portion for impinging the two liquids is integrally formed with the structure of the present invention, so that the mixing characteristics of the two liquids are remarkably improved. By the improvement, (1) the difference in the mixing ratio of the two liquids, (2) the high-viscosity liquid and when the liquid temperature decreases, and (3) the allowable mixing range when the collision pressure decreases, can be expanded.
Variations in the surface properties and physical properties of the formed sheet can be reduced. In addition, the cleaning method of the gun corresponds to various methods, and can be used for spraying, casting, and the like.

[Brief description of the drawings]

1 and 2 are a sectional view and a front view, respectively, showing the configuration of the improved GX-7 gun mixing module used in Example-1. FIGS. 3-1 to 3-3 show Example-4, FIGS. 4-1 to 4-3 show Example-5, FIGS. 5-1 to 5-3 show Comparative Example-4, and FIGS. 6-1 to 6-3 show Comparative Example-5. 7 and 8 are perspective views and front sectional views of an improved mixing module for a prober gun used in Example-6. It is. In the figure, 1 is a mixing module, 2 is a valving rod, 1a is an inflow hole for liquid A, 1b is an inflow hole for liquid B, and 1c is an ejection hole for mixed liquid.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B29B 7/76 B01F 5/02 B05B 7/08

Claims (1)

(57) [Claims] 1. An apparatus for discharging a liquid A and a liquid B of a two-liquid mixed-curable resin from a discharge port and mixing them by a collision mixing method, wherein a mixing chamber portion for causing the two liquids to collide is provided.
(1) It has two or more discharge ports (orifices) for liquid A and liquid B, respectively. (2) The total opening area ratio of the liquid A and liquid B discharge ports is (3) Solution A and / or Solution B are discharged linearly toward the center of the mixing chamber, and (4) Solution A An improved collision-mixing type mixing module, characterized in that the angle at which the two liquids directly collide with each other is set such that the angle at which the two liquids are discharged into the mixing chamber.