JPH0493204A - Improved colliding and mixing type mixing module - Google Patents

Abstract

PURPOSE:To obtain a fixed spraying situation always without controlling size of a mixing chamber, by a method wherein the title module possesses structure where a liquid A and liquid B possess respectively at least two discharge parts, both of the liquid A and liquid B or either of them is discharged linearly toward the center of the mixing chamber and a discharge angle is made into a colliding direction. CONSTITUTION:Orifices 1a for a liquid A are bored in two positions by making the positions into 180 degrees ahead and orifices 1b for a liquid B are bored in four positions by making the positions into 90 degrees backward. Respective apexes of discharge angles are on a line where the two liquids A, B move toward the central part and a direction is made into an angle to be formed by both the liquids A, B colliding directly with each other. That is, the two liquids A, B are designed so that they are mixed up with each other under a state where they collide directly with each other and a turning motion is not generated. A volume ratio of liquid A: liquid B=1:2 is used for raw materials. Since mixture characteristics of the two liquids are improved extraordinarily, expansion of a mixture allowable range becomes possible at the time of (1) difference between mixture ratios of the two liquids, (2) lowering of the high-viscosity liquid and a liquid temperature and (3) lowering of colliding pressure. Dispersion in surface properties and physical properties of a molded sheet can be reduced.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention discharges liquids A and B of resin raw materials such as urethane, epoxy, and unsaturated polyester from a discharge port and mixes them using an impingement mixing method to spray or spray. This improvement improves the mixing characteristics of the collision-mixing type mixing module (a component in which the discharge ports [orifice] for liquids A and B and the mixing chamber for collision-mixing the two liquids are integrally molded) used during injection molding. This is to stabilize the physical properties and, in the case of spray molding, to improve the spray conditions (pattern).

[Prior Art] When molding a two-component quick-curing material with a high reaction rate, an impingement mixing method is usually used. This is because mechanical mixing and static mixing do not allow enough time to clean the mixing chamber because the reaction is fast. The collision mixing method has the feature that cleaning the mixing chamber after the mixed liquid is ejected can be done in a short time by mechanically moving a rod in and out, or by using a solvent or air. This may cause variations in the physical properties of the product.

This method mainly depends on the rotational movement of the liquid by adjusting the pressure at the time of collision and the liquid discharge angle, so when the material has a high liquid viscosity or the collision pressure is low, mixing of the two liquids is sufficient. It is thought that this may result in variations in the physical properties of the product.

Furthermore, when the blending ratios of liquid A and liquid B are different, the amounts discharged into the mixing chamber are different, so the larger the difference in the mixing ratio, the lower the mixing efficiency. Furthermore, in the case of injection molding, there are not so many problems, but in the case of spray molding, the spray conditions (mist concentration distribution, mist particle size, pattern shape, etc.) are important, and have a large effect on workability and the surface condition of the product. affect.

Conventional mixing heads can be classified into two categories based on cleaning methods. An example of a solvent cleaning method is the #43P gun manufactured by Binks in the United States. This gun uses separate parts with one circular hole as an orifice for liquids A and B, which are attached at 180 degrees on both sides, and are discharged into a relatively large-diameter mixing chamber, where they collide and mix. . The problem with this method is that there is only one hole for each hole, and because the liquid orifices are separate parts, the diameter of the mixing chamber becomes thicker, reducing mixing efficiency. For this reason, it is mainly used for low viscosity paints containing a high percentage of solvent.

High viscosity liquids do not mix well, so if you use a #43P gun with a static mixer at the tip, you will need to mix it again, but this cannot be used with materials that take a short curing time because there is no cleaning time.

An example of an air cleaning method is a Problur gun manufactured by Glass Craft, Inc. in the United States. This gun is a module with a mixing chamber and a nozzle integrated, and has one orifice on each side for liquid A and liquid B, and discharges linearly from the top and bottom of the hole in the mixing chamber. It has a structure. The problem with this gun is that there are orifices at 180 degrees, or one each.
In addition to the fact that there are only two orifices, the liquid orifices are located at the top and bottom of the mixing chamber, so the liquid swirls and is ejected through the same nozzle. For this reason, rotation remains in the liquid even when it is ejected, and when spraying, the spray condition (pattern) changes and at the same time a difference in concentration distribution occurs.

As a result, in order to maintain proper spray conditions, it is necessary to subtly change the position at which the mixing chamber is retreated.

Examples of cleaning methods that mechanically move rods in and out include Toho Kikai, Krauss Matsfaye, and Canon, which are used in Gasmer's D-gun, GX-7 gun, and RIM (reaction injection molding). be. In the case of the D gun, there is one rectangular hole on each side of the integrated mixing chamber.
The structure is such that two liquids are discharged linearly into the upper and lower parts of the mixing chamber, and the liquid discharged into the mixing chamber is mixed and ejected while swirling, and is used for spraying or injection. ing.

The problem with this gun is the number of holes, one each.
It has the same problems as the Problur gun.

That is, concentration differences tend to occur in the spray pattern, and it is necessary to change the retreat position of the cleaning lot and change the length of the mixing chamber each time a spray operation is performed.

In the case of the GX-7 gun, it has an integrated mixing module structure, and the liquid discharge position is precisely determined, and the two liquid discharge positions are also at the front and rear, but the problem is the liquid discharge angle. The jets are parallel to each other and perpendicular to the jetting direction. For this reason, the biggest drawback is that the two liquids do not directly collide and problems occur in the mixing properties.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.

The head used in tM molding is usually machine-washable and has one orifice on each side, with an "after mixer" on the mold side to improve mixing characteristics.
, remixing aids such as "film gates" are used.

[Problem to be solved by the invention]

When discharging liquids A and B of resin raw materials such as urethane, epoxy, and unsaturated polyester from the discharge port and performing spray or injection molding using the collision mixing method, as described above, conventional mixing methods have various drawbacks. The inventors of the present invention have found that it is compatible with a wide range of material compounding ratios, can be used with high viscosity materials, has good mixing characteristics of the two liquids even at low collision pressures, and has no variation in the physical properties of the cured product. We investigated the structural design of a mixing module that is free from the air and has good spray conditions (atomization conditions such as mist concentration distribution, mist particle size, and pattern shape) during spray molding.

[Means to solve the problem]

When mixing two liquids using the collisional mixing method, the factors that affect the mixing efficiency are: (1) Reynolds number (a dimensionless term determined by the size of the device/kinematic viscosity of the liquid/fluid velocity/density of the liquid) (
2) Distance over which the two colliding liquids are discharged (diameter of the mixing chamber) (3) Rotation of the two liquids is considered to be the main factor. However, if the material (liquid viscosity) or the discharge rate cannot be changed, improving the mixing efficiency is severely limited.

As a result of intensive investigation into a method for improving the mixing characteristics using the impingement mixing method, it was found that the above-mentioned drawbacks could be significantly improved by changing the design of the mixing module to the one shown below. That is, the mixing chamber part where the raw materials A and B collide is an integrally molded module, (1) A and B each have two or more discharge ports (orifices), and (2) discharge. The number and/or area ratio of the outlets is within ±50% of the blending ratio of liquids A and B, and (3) both or either of liquids A and B are directed straight toward the center of the mixing chamber. (4) A collision mixing type mixing module having a structure in which the angle at which liquids A and B are discharged into the mixing chamber is set in a direction in which the two liquids directly collide.

The reason for the improvement in mixing characteristics is thought to be the combined effect of the following items. (1) By increasing the possibility that the two liquids will directly collide, the energy of the collision can be utilized. (2) By providing two or more small-diameter discharge ports, the discharge pressure is ensured, the liquid is divided into small pieces, and the chances of contact between the two liquids are increased. (3) By making the mixing chamber portion into which the two liquids are discharged and mixed into an integral structure, the position and angle of the discharge port are precisely determined, and mixing is always performed under constant conditions. (4) In the case of spray molding, in order to ensure a good spray pattern, it is possible to suppress the rotational movement of the liquids by causing the two liquids to collide directly or mixing by rotating only one side. It is now possible to always obtain a constant spray condition without adjusting the size of the spray.

The equilibrium mixing type stirring device having the structure according to the present design can be used as a spray head, a bore head for casting, a nozzle connected to the tip for injection, and also for RIM. The cleaning method may be mechanical cleaning using a rod, air cleaning, or solvent cleaning.

However, from the viewpoint of liquid sealability and spray pattern control, a mechanical design that allows wood to be inserted and removed is most suitable as it has a high degree of freedom. It is also possible to change the liquid used from a circulating type to a one-way type and use a hand-held gun type with a reasonable size.

Table 1 shows a summary of spray heads and mixing chambers from each company.

Table 1: Spray heads and mixing chambers from various companies Examples of high-pressure two-liquid dispensing machines used for molding of the present invention include:
8 of increasing the liquid pressure to a high pressure of about 100 kg/an
If it is the type that comes, you can use it without worrying about the format. Actual examples include the THD-2K made by Toshi Engineering Co., Ltd. using a gear pump as the pump, the NR-230ffi high-pressure polyurethane foaming machine made by Toho Kikai Kogyo Co., Ltd. using an axial piston pump, and the plunger pump used. These include the H-2000 model from USA) and the T-3H from Glasscraft (USA).

〔Example〕

The present invention will be explained below with reference to Examples.

(Explanation of terms) (1) Tack-free time: The shortest time when 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 situation (pattern): The following items were visually observed and the results were shown.

・Concentration distribution: The difference in concentration of particles ejected from the gun, streaking, etc. ・Particle size: Check the size and atomization status of the particles ejected from the gun, the shape, the shape of the ejected material sprayed on the target, Confirmation of deformation, etc. (3) Surface quality: Spray molding was performed on a polypropylene plate to a thickness of approximately 2 cm, and the smoothness of the surface and the presence of pinholes were examined.

(4) Physical property test: According to JIS K-6301, measurements were performed after curing for one week at 23° C. and 55% humidity.

(Molding material) Rim spray (Mitsui Toatsu Chemical quick curing 2
(liquid type urethane spray material) was used.

The following two brands with different blending ratios and viscosities were used.

Table 2: Properties of materials used (catalog values) Note: Cure time: The time it takes for rubber elasticity to develop. Both are fast-curing materials and react and cure immediately after spraying, so it is essential to use an impact mixing gun when mixing. .

Liquid A: Isocyanate component [The main ingredient is a modified product of diphenylmethane diisocyanate (MDI-PH), manufactured by Mitsui Toatsu Chemicals] Liquid B nyresin component (high-pressure two-component discharge machine) H-2000 model manufactured by Gasmer Co., USA was used. This machine is
-A one-way type hydraulically driven double-action plunger pump that can be used for injection and spraying. The hydraulic pressure is 2000psi (approximately 140kg/
cl) The structure allows the pressure to be increased and the liquid temperature to be set separately for liquid A and liquid B.

Hereinafter, the present invention will be explained in detail with reference to drawings and examples. 1 and 2 are cross-sectional views and front views showing the configuration of the improved GX-7 gun mixing module used in Example-1, and FIGS. 3-1 to 3-3 are Example-4, Figures 4-1 to 4-3 are Example-5, Figures 5-1 to 5-3 are Comparative Example-4, and Figures 6-1 to 6-3 are Comparative Example-5. 7 and 8 are perspective views and front sectional views of the improved mixing module for the trouble gun used in Example-6, respectively. It is.

In the figure, l is a mixing module, 2 is a pulping loft, 1a is an inflow hole for liquid A, 1b is an inflow hole for liquid B, and lc is an injection hole for mixed liquid.

Example 1 A GX-7 gun with a mechanical cleaning method manufactured by Gasmer was used as a spray head, and a mixing module newly designed by the present inventors was used. The structure is shown in FIGS. 1 and 2. The schematic diagrams in Tables 3 to 5 show the discharge angles of liquids A and B into the mixing chamber and the collision angles of these two liquids. As shown in Figures 1 and 2, two orifices for liquid A (isocyanate component) are drilled in the front with the holes positioned at 180 degrees, and orifices for liquid B (resin component) are drilled in the rear. Four chambers were opened at a position of 90 degrees, and the discharge angle of each chamber was set so that the two liquids were on a line toward the center of the mixing chamber, and the direction was such that the two liquids collided directly. In other words, the design was such that the two liquids collide directly and are mixed without any rotational movement. The diameter of all orifices was 0.406 mm and the diameter of the mixing chamber was 3.175 m. The material was polyacetal resin (Delrin, trademark of Du Pant) in consideration of wear resistance due to repeated use and liquid sealing properties. A spray tip (J212: fan-shaped pattern) was attached to the tip of the gun to perform molding. The raw materials are Rim Spray PD-450CA liquid, B liquid = 1; 2 volume ratio), the liquid temperature is 50°C for liquid A, and 65°C for liquid B. The pressure at discharge is 112 kg/cd and 120 kg/cd, respectively. The conditions were set as follows. As shown in Table 3, the results showed that the tack-free time was 9 to 11 seconds, indicating fast curing, and the spray conditions (
When I observed the pattern), I found that the concentration distribution was uniform.
The particle size was fine, the shape was fan-shaped and normal, and no deformation was observed. The surface of the molded product was smooth and no pinholes were observed. The curability was sufficient, and the physical property test results of the sheet 2 produced were excellent in hardness, modulus, tensile strength, elongation, and tear strength, indicating good mixing properties.

Comparative Example-l The spray head was GX-
7 gun was used, and the company's #1O type mixing module was used. The structure is shown schematically in Table 3, and the structure is shown in Table 3 using the same schematic method as in Example 1. In addition, the flow of the liquid is shown in Table 3. There are two orifices for the main agent (isocyanate component) at the front and two orifices for the resin component at the rear, and the discharge angle of each is perpendicular to the pulping loft, and the two liquids are fed into the mixing chamber. It has a structure in which the liquid is discharged in a parallel flow. Since it is on a line passing through the center of the mixing chamber in the liquid discharge direction, the structure is such that no rotation occurs in any of the liquids.

All orifices have a diameter of 0.914 mm. As shown in Table 3, the molding test result shows that the amount of mixed liquid ejected was 5.2k.
g/min, which is about 1.6 times that of Example-1. The spray conditions were normal, with fine particle size and fan-shaped shape.
The concentration distribution was uneven, thicker at the edges, and streaky. The tack-free time was 9 to 10 seconds, which was the same as in Example-1, but the physical property test results were lower in all items, and the two molded sheets had different physical properties, resulting in fluctuations in the mixing properties. was recognized. Since the diameter of the orifice was larger than that of the mixing module prototyped in Example 1, the mixing efficiency from the point of view of the Raynozzle number was considered to be good, but the physical properties changed with a slight change in conditions.

It turns out that there are shortcomings. Especially the discharge pressure is about 70kg.
/al, tackiness occurred throughout the sheet or poor curing occurred in the remaining portions, making it impossible to measure physical properties.

Examples-2,-3 Using the same spray head and raw materials as Example-1,
Among the molding conditions, only the "discharge pressure" was lowered.

As shown in Table 3, the spray condition and surface properties similar to Example 1 were maintained even when the discharge pressure was reduced, and the physical properties were almost the same or showed only a very slight decrease.
The mixing characteristics have little pressure dependence and are stable against pressure drops, which has great practical advantages.

Comparative Examples-2 and -3 Using the same spray head and raw materials as Comparative Example-1,
Among the molding conditions, only the "discharge pressure" was lowered to reduce the mixing characteristics. As shown in Table 3, the spray condition worsened as the discharge pressure decreased.
The physical properties also deteriorated, and the mixing properties were investigated using a GX-7 gun manufactured by Gasmar Co., Ltd. for mixing and applying rotation to the liquid discharged into the mixing chamber. Figures 3-1 to 3-3 show # of the flow direction of liquid A and liquid B in the improved mixing module for GX-7 gun.
As shown in the figure, liquid A (isocyanate component) discharged from the front is introduced linearly toward the center of the mixing chamber through two holes made with the hole position set at 180 degrees.
Liquid B (resin component) was introduced from the rear through four orifices with the hole positions set at 90 degrees, and the liquid was discharged at an angle that caused the liquid to rotate in the direction in which liquid A was discharged. . In other words, the liquid to be discharged is B, which is discharged from the rear.
The design was such that only the liquid rotates, and the A liquid discharged from the front is mixed without rotating. The number and area of orifices are the same as in Example-1, and both are adjusted to the blending ratio of the materials.

As the stock solution, Rim Spray PD-450 was used under the same setting conditions (liquid temperature, discharge pressure) as in Example-1. As shown in Table 4, this result shows that the discharge rate is 3.3 kg/min, which is a medium discharge rate, and the curing/reactivity is 9 to 1 in tack-free time.
It showed good curability with fast curing of 1 second. When I observed the spray situation, I found that (1) the 1 degree distribution was uniform throughout;
(2) The particle size was fine. (3) The shape was fan-shaped and no deformation was observed. Physical property test results include hardness, modulus,
All of the items of tensile strength, elongation, and tear strength were excellent, and the results were good.

Example-5 Using Gasmar's GX-7 gun, the setting conditions are as in Example-
4, and FIGS. 4-1 to 4-3 are schematic diagrams of the flow directions of liquid A and liquid B in the mixing module. Liquid A (isocyanate component) discharged from the front part
was introduced through three orifices at an angle that caused the liquid to rotate, and from the rear, liquid B (resin component) was introduced linearly toward the center of the mixing chamber through six slotted chairs.

That is, the design was such that only the liquid A, which is discharged from the front part, rotates, and the liquid B, which is discharged from the rear part, is mixed without rotating. The number and area of orifices were the same as in Example-4. As shown in Table 4, the results showed good curing and reactivity, with a tack-free time of 9 to 11 seconds and fast curing. When the spray conditions were observed, (1) the 1 degree distribution was uniform throughout, (2) the particle size was fine, and (3) the shape was fan-shaped and no deformation was observed. Physical property test results include hardness, modulus, tensile strength,
Both the elongation and tear strength items were excellent and the results were good.

Comparative Example-4 The equipment and setting conditions used were the same as in Example-4, and Figures 5-1 to 5-3 are schematic diagrams of the flow directions of liquid A and liquid B in the mixing module. Liquid A (isocyanate component) was discharged from the front through two orifices, and liquid B (resin component) was discharged from the rear through four orifices at an angle such that both liquids rotated. . The directions of rotation are the same, and the two liquids are mixed in a state where rotational movement is performed in the mixing chamber. The number and area of orifices were the same as in Example-4.

As shown in Table 4, the results showed good curing and reactivity, with a tack-free time of 9 to 11 seconds, similar to Example 4. However, when the spraying conditions were observed, (1) the concentration distribution was non-uniform with dark areas at the edges, and the thickness changed during molding. (2) Were the particle sizes fine and good? (3) The shape of the spray was twisted (deformed), making spraying very difficult and causing problems in controlling the thickness of the molded product and in terms of yield. The physical property test results showed that although hardness was exhibited, the modulus, tensile strength, elongation, and tear strength were all lower than those of Examples-4 and -5.

Comparative Example-5 The equipment and setting conditions used were the same as in Example-4, and FIGS. 6-1 to 6-3 are schematic diagrams of the flow directions of liquid A and liquid B in the mixing module. Liquid A (isocyanate component) was discharged from the front through two orifices, and liquid B (resin component) was introduced from the rear through four orifices at an angle such that both liquids rotated. . The directions of rotation are opposite, and the two liquids are mixed in the mixing chamber in a state where rotational movement is suppressed. The number and area of orifices were also the same as in Example-4. As shown in Table 4, the test results showed a tack-free time of 9 to 11 seconds for curing and reactivity, indicating fast curing and good curability as in Example 4.

However, when the spraying conditions were observed, (1) the concentration distribution was non-uniform with dark areas at the edges, and the thickness changed during molding. (2) Were the particle sizes fine and good? (3) The shape of the spray was twisted (changed) and the spraying process was extremely difficult, causing problems in controlling the thickness of the molded product and in terms of yield. The physical property test results showed that although hardness was exhibited, the modulus, tensile strength, elongation, and tear strength were all lower than those of Examples-4 and -5.

Example 6 A mixing module was prototyped using a Probler gun manufactured by Glass Craft Co. as an air cleaning gun. This gun discharges and stops liquid by sliding an integrated mixing chamber with an orifice back and forth, but there are three holes on each side of the mixing chamber, and the liquid is discharged at all angles from the mixing chamber. It was straight toward the center of the chamber. The structure is shown in FIGS. 7 and 8. That is, the liquid to be discharged is mixed in a situation where direct collision mixing is performed from both sides. The number and area of orifices are the same in accordance with the material blending ratio, and the diameter is 0.45 days and the total area is 0.4.
It was set to 47mm'. As shown in Table 4, the discharge rate was a medium discharge rate of 3.9 kg/min, and the curing and reactivity showed good curing properties with a tack-free time of 12 to 14 seconds. . When I observed the spray situation, (
1) The 11 degree distribution is uniform throughout. (2) The particle size is medium to fine and no spray tip is used, so although the particle size is somewhat large, it is sufficient for actual use. (
3) The shape was round and no deformation was observed. The physical property test results were excellent in all items of hardness, modulus, tensile strength, elongation, and tear.

Comparative Example 6 A mixing module manufactured by Glass Craft Co., Ltd. (Magic R# Round type without a tip) was used, and the same machine, raw materials, and setting conditions as in Example 6 were used. R#1
For the flow direction of the liquid in the chamber, as shown schematically in Table 4, there is one orifice on each side, and the liquid discharge angle is introduced in the direction in which liquid A and liquid B rotate in the mixing chamber. The format is Example-6
Similarly, the discharged liquid is stirred and mixed in a situation where direct collision mixing is performed from both sides. The number and area of orifices were 1:1 and the diameter was 0.80-. As shown in Table 4, the discharge rate is 4.4 kg/min, which is a rather large discharge rate, and the curing/reactivity is tack-free.
It exhibited good curing properties with fast curing time of 12 to 14 seconds. When we observed the spray conditions, we found that (1) the concentration distribution was uniform throughout, (2) the particle size was large, and when the sheet was formed, the surface was not smooth and uneven, and there were pinholes, which made the design difficult. It is unsuitable for important uses.

(3) The shape was round and no deformation was observed. The physical property test results showed low results in all items of hardness, modulus, tensile strength, elongation, and tear strength.

Comparative Example-7 A 43P gun manufactured by Binks was used. This gun uses an orifice attached directly to the mixing chamber rather than a 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 outlined in Table 4, and the liquid discharge angle is such that the liquid is introduced straight toward the center of the mixing chamber. It has become. The apertures of the orifices can be individually set arbitrarily, but the number is limited to one.

This time, the blending ratio of materials is the same as in Example-6, and the diameter is 0.
．． It was set to 89 mm. There is a spray tip (0) at the tip of the gun.
The test was carried out with a 30-450 diameter (0.030 inch fan opening angle of 45 degrees) installed. The results are shown in the table-
As shown in 4, the discharge rate is 2.4 kg/min, which is a rather small discharge rate, and the curing/reactivity is tack-free time of 1.
The curing time was 6 to 22 seconds, which was slightly lower. When the spray conditions were observed, (1) the concentration distribution was uniform throughout, (2) the particle size was fine and the surface of the sheet was smooth and good, and (3) the shape was fan-shaped with no deformation observed. However, physical property test results showed that hardness, modulus, tensile strength, elongation, and tear strength were all quite low.
The result was that the mixture was not sufficiently mixed.

Comparative Example-8 Mixing module (52L) for Gasmer's D gun
was used for installation. Table 4 outlines the flow direction of the liquid discharged from this mixing module.

This structure is an integrated structure with rectangular slotted chairs of the same diameter on both sides. The orifice size is 0.3 x 3 mm, and discharge is directed to generate rotation in the same direction into a cylindrical mixing chamber that is machine cleaned.

There is no way to attach a spray tip to the tip of the gun. The machine body and raw materials were the same as in Example-6, but
The setting conditions were low because the gun's withstand pressure was 70 kg/al, and the setting was set at the upper limit of the withstand pressure. As shown in Table 4, the discharge rate was 3.2 kg/min, which was a medium rate, and the curing/reactivity was tack-free time of 11 to 13 seconds, so there were no particular problems with the curing properties. When I observed the spray situation,
(1) The concentration distribution was non-uniform with partial concentration differences. (2) The particle size was very large, the smoothness of the sheet was poor, and there were many pinholes, and the situation was worse than when using the problur gun of Comparative Example 6, making it impossible to put it into practical use. (3) The shape was round and deformed. With this gun, the length of the mixing chamber can be changed by adjusting the position of the rod, so we tried this, but the deformation and concentration distribution were not improved. The physical property test results showed that the hardness, modulus, tensile strength, elongation, and tear strength were all quite low, indicating that stirring and mixing were not performed sufficiently.

Example 7 Using a GX-7 gun manufactured by Gasmar Co., Ltd., the spray conditions and physical properties were investigated when the spray setting conditions were to lower the liquid temperature and the viscosity of the stock solution was high. As shown in Table 5, the design of the mixing module is as follows: Liquid A (isocyanate component) is discharged from the front through two circular orifices, 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 Liquid A. In other words, the design is such that the discharged liquid is mixed in a situation where neither the front nor the rear rotate. The number and area of orifices were the same as in Example-4. Curing/reactivity is tack free time or 13
It exhibited good curability with fast curing of ~15 seconds. When the spray conditions were observed, (1) the concentration distribution was uniform throughout, (2) the particle size was fine, and (3) the shape was fan-shaped, with no deformation observed.

As shown in Table 5, the physical property test results showed excellent results in all items of hardness, modulus, tensile strength, elongation, and tear strength, and even when the temperature of the stock solution increased, the surface properties of the molded product and It showed that there was no effect on the physical properties at all, and the mixing characteristics were good.

〔Effect of the invention〕

In the method of mixing two-component fast-curing materials by collision mixing, by using the structure of the present invention in which the mixing chamber portion where the two components collide is integrally molded, the mixing characteristics of the two components are significantly improved. , (1) Differences in the blending ratio of the two liquids, (2) High viscosity liquids and when the liquid temperature drops, and (3) It is possible to expand the mixing tolerance range when the collision pressure drops.
Variations in the surface properties and physical properties of the molded sheet can be reduced.

In addition, the gun can be cleaned in various ways, such as by spraying or cleaning.

[Brief explanation of the drawing]

Figures 1 and 2 show the improved GX-7 used in Example-1.
A sectional view and a front view showing the configuration of a mixing module for a gun, Figures 3-1 to 3-3 are Example-4 and Figure 4-1.
Figures 4-3 are front views of Example-5, Figures 5-1-5-3 are Comparative Example-4, and Figures 6-1-6-3 are front views of Comparative Example-5. 7 and 8 are a perspective view and a front sectional view of an improved mixing module for a troubler gun used in Example-6. In the figure, ■ is the mixing module, 2 is the pulping rod, and l
a is an inflow hole for liquid A, ib is an inflow hole for liquid B, and lc is an injection hole for mixed liquid.

Claims (1)

[Scope of Claims] In an apparatus that discharges liquids A and B of resin raw materials such as urethane, epoxy, and unsaturated polyester from a discharge port and mixes them using a collisional mixing method, a mixing chamber portion that causes the two liquids to collide, It is a module that is integrally molded, and (1) has two or more discharge ports (orifices) for liquid A and liquid B, and (2) has a ratio of the number and/or area of the discharge ports for liquid A and liquid B. Within ±50% of the blending ratio of liquid B, (3) both or one of liquid A and B are discharged linearly toward the center of the mixing chamber, and (4) liquid A and liquid B are discharged linearly toward the center of the mixing chamber. An improved collision mixing type mixing module characterized in that the angle at which two liquids are discharged into a mixing chamber is set in a direction in which two liquids directly collide.