JP2008307721A - Mixing head device and molding method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixing head device which allows an improvement in high agitation of mixed liquid and smooth flow of the mixed liquid from a discharge port, and ensures cost reduction and excellent productivity, and a molding method using it. <P>SOLUTION: The mixing head device is constituted so that mixing is performed by injecting two kinds of chemically reactive liquid blended raw materials 5 from fine holes provided on a chamber wall 11 into a chamber 10, and colliding the blended raw materials 5 with each other, wherein two to four fine holes 30 related to at least one of the two blended raw materials 5 are provided, and two or more of the two to four fine holes 30 have central axes 35 crossing in the chamber 10, injected liquid 50 of the blended raw material injected from the fine holes 30 having the crossing central axes 35 self-collides in the chamber 10 prior to collision with the other blended raw material. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mixing head device that stirs and mixes two kinds of chemically reacting raw materials such as polyurethane foam and a molding method using the mixing head device.

For example, when molding polyurethane foam, a high-pressure type mixing head device may be used, and the conventional device has a fixed nozzle type mixing head device as shown in FIG. FIG. 13 is a detailed view of the lower part of FIG. In the mixing apparatus of FIGS. 12 and 13, a nozzle in which one compounding material 5 a and two other compounding materials 5 b related to two kinds of chemically reacting compound materials 5 a and 5 b are provided on the opposite side walls 11 of the chamber 1. The plunger 80 is used for injection into the chamber 10 from the hole 80 at a high pressure, and both the blended raw materials 5a and 5b are collided and mixed. Reference numeral W denotes a collision point, reference numeral 8 denotes a nozzle member, reference numeral 2 denotes an injection piston, and reference numeral OL denotes oil for the injection piston. A mixed liquid 6 (mixed liquid) in which two kinds of blended raw materials 5 are mixed is discharged from a discharge unit 13 below the apparatus into a molding die (not shown) and molded as it is.
Therefore, for the mixing head device, (1) the mixed liquid 6 is highly stirred, and (2) the mixed liquid 6 from the discharge port 14 scatters at the start of discharge without being scattered. There has been a demand for uniform and smooth discharge at a mixing ratio (hereinafter referred to as a smooth flow). Therefore, in order to obtain a raw material that is a highly stirred liquid mixture, the speed at the time of passing through the nozzle has been increased. However, this increases the pressure of the pump and increases the load on the apparatus. Moreover, there is a limit to the pump pressure, and smooth flow is difficult to achieve even higher agitation. When the mixed liquid 6 is discharged from the discharge port 14 of the mixing head device, if excess energy remains in the mixed liquid 6, it is difficult to obtain a smooth flow of the mixed liquid 6.
For these reasons, in order to solve such a problem, the device shown in FIG. 14 and FIG. 15 and the improved device as the invention title “resin foaming stock solution injection device” have been proposed (see Patent Document 1).

JP 2003-299939 A

However, the apparatus shown in FIGS. 14 and 15 has the following problems. The apparatus of FIG. 14 is provided with a baffle pin 91 downstream of the inside of the chamber 10 to increase the degree of mixing while the mixed liquid 6 after the collision of both blended raw materials 5a and 5b passes through the baffle pin and to ensure a smooth flow. However, a complicated mechanism had to be adopted. In the production of the polyurethane foam that handles the highly viscous blended raw material 5, both the blended raw materials 5a and 5b need to collide, mix and discharge, and then the injection piston 2 is lowered to clean the chamber inner wall 11. Therefore, each time the baffle pin 91 has to be retracted, the device becomes expensive. In addition, the manufacturing process has two steps as compared with the one step in FIG.
The apparatus of FIG. 15 does not secure a smooth flow by accelerating the secondary agitation and depriving the kinetic energy by colliding with the inner wall surface Q from the collision point W where the mixed raw materials 5a and 5b collide with each other at the inner wall surface Q. However, this also complicates the structure and causes an increase in the cost of the apparatus. Even in the manufacturing process, the operation of the injection piston 2 and the operation of the cleaning member 92 are linked, and in addition, the inner wall must be cleaned by the rod 921, which affects the productivity.
The technology of the above-mentioned patent document 1 is described as follows: “The resin foam is discharged from the nozzle including a head portion for mixing the resin foam stock solution and a nozzle connected to the tip side of the head portion for discharging the resin foam stock solution. Although the undiluted solution is a resin foam undiluted solution injection device in which the undiluted solution collides with a colliding portion provided in the nozzle, there is a risk that mixing will be insufficient. While colliding with the collision part to promote secondary agitation, the kinetic energy is deprived to ensure a smooth flow, but the collision structure is simplified, which may result in insufficient mixing.
FIG. 16 shows a schematic view of the product outline according to one test method. A horizontally moving belt is placed below the discharge unit 13 of the mixing head device, and after this, the mixed liquid 6 (mixed liquid) flowing out from the discharge unit 13 after the collision of the blended raw materials 5a and 5b is poured and cured. , Ie, the outline from the head part first ejected through the trunk to the tail part at the end. Incidentally, FIG. 17 is a product outline made by using the conventional apparatus of FIG. If the mixing due to the collision is insufficient or the smooth flow of the mixed liquid 6 after mixing is insufficient, as shown in FIG. 17, the product has a head portion of the discharge start portion (the right portion in FIG. 17). Corresponding) led to poor quality such as protruding defects and voids appearing.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and improves the smooth mixing flow of the mixed liquid and the mixed liquid from the discharge port, and at the same time, reduces the cost and improves the productivity and uses the mixing head apparatus. An object of the present invention is to provide a molding method.

In order to achieve the above object, the gist of the invention described in claim 1 is that two kinds of chemically mixed raw materials that are chemically reacted are injected into the chamber from the respective pores provided on the side walls of the chamber, and the two raw materials are collided. In the mixing head device to be mixed, a plurality of the pores related to at least one of the two compounding raw materials are provided within a range of 2 to 4, and two of the two to four are further provided. The central axis of two or more pores intersects in the chamber, and the injection liquid of the blended material injected from the pore intersecting the center axis self-impacts in the chamber prior to the collision with the other blended material. The mixing head device is characterized in that. Here, the “chamber” refers to the entire space where the blended raw material is injected and mixed and stirred. “Self-collision” means that one type of liquid blended raw material is jetted as a jet from two or more pores, and these jets collide with each other by crossing.
A mixing head device according to a second aspect of the present invention is the mixing head device according to the first aspect, wherein the nozzle part is detachably fixed to a wall hole provided in the side wall of the chamber, and the fine hole is formed in the nozzle part. And A mixing head device according to a third aspect of the present invention is the mixing head device according to the second aspect, wherein the nozzle part is formed with two pores and the crossing angle (θ) at which the central axes of the two pores intersect is in the range of 30 ° to 90 °. It is characterized by being inside.
The gist of the invention described in claim 4 is that one compounded raw material and the other compounded raw material related to two kinds of chemically compounded liquid reacting materials are injected into the chamber from the pores respectively provided on the side wall of the chamber, A mixing head device that collides and mixes both blended raw materials, wherein a plurality of pores related to at least one of the blended raw materials among the two blended raw materials are provided in a range of 2 to 4, and the two A mixing head device in which the central axis of two or more pores among the four to four intersects in the chamber, and the injection liquid of the blended raw material injected from the pore intersecting the central axis self-impacts in the chamber Use one of the two blended raw materials to make the jet liquid of one blended raw material collide, then collide with the other blended raw material, mix both blended raw materials, and then discharge and cure it in the mold Molded by In molding method using the mixing head apparatus according to claim and. In the molding method using the mixing head device according to the fifth aspect of the invention, the two kinds of compounding raw materials that chemically react in the fourth aspect include a compounding raw material containing a polyol component for a two-component polyurethane resin and an isocyanate component. It is a compounding raw material.

  According to the mixing head device of the present invention and the molding method using the same, at least one pore of both compounding raw materials is provided in the range of 2 to 4, and further, at least two of the pores are provided. By simply intersecting the central axis in the chamber, it becomes easy and reliable to achieve high agitation of the liquid mixture and smooth flow of the liquid mixture from the discharge port, reducing costs and improving productivity and quality. Demonstrates excellent effects.

  Hereinafter, embodiments of the mixing head device according to the present invention and a molding method using the same will be described in detail. 1 to 11 show one embodiment of a mixing head device of the present invention (hereinafter referred to as “mixing device”) and a molding method using the mixing head device. FIG. 1 is a schematic longitudinal sectional view of a lower part of the mixing device. 2 (a) is a longitudinal sectional view of the nozzle component of FIG. 1, and (b) is a right side view of (a). 3 is an exploded explanatory view showing how the nozzle part and the nozzle holder are mounted in the wall hole of the chamber of FIG. 1, FIG. 4 is a partially enlarged view of the nozzle part of FIG. 2 (a), and FIG. 5 is the nozzle of FIG. FIG. 6 is an explanatory view showing the positional relationship between nozzle parts mounted on opposing side walls of the chamber of the mixing apparatus, and FIG. FIG. 6 is a schematic shape of the collision surface formed by the collision of the jetting liquids of both blended raw materials injected from the fine pores of the nozzle part of FIG. 6, and is a view taken along the line IV-IV in FIG. FIG. 8 is an explanatory view showing the positional relationship of the nozzle components attached to the opposite side walls of the chamber of the mixing device, and is a different view different from FIG. 6, and FIGS. 9 to 11 are test products using the mixing head device. FIG. Note that FIG. 3 omits the hatching showing the cross-section of the nozzle part for easy understanding of the drawing.

  The basic structure of the mixing apparatus of the present invention is almost the same as the conventional mixing apparatus shown in FIGS. One compounding raw material 5a and two other compounding raw materials 5b relating to two kinds of chemically reacting liquid compounding raw materials 5 are injected into the chamber 10 from the pores 30 provided on the opposite side walls 11 of the chamber 1, respectively. The mixing raw material 5a, 5b collides and mixes. This high-pressure type mixing apparatus does not rely on cleaning with a solvent, but employs a mechanical cleaning method using an injection piston 2 as shown in FIG. FIG. 1 corresponds to a lower enlarged vertical sectional view of the mixing apparatus of FIG. 12, but an injection piston 2 is provided as in FIG. The mixed liquid 6 that collides and mixes both the blended raw materials 5a and 5b in the chamber 10 is discharged from the discharge port 14 into the molding die 7, and then the piston moves up and down to collide both the blended raw materials 5a and 5b. The chamber inner wall 11 after mixing is cleaned by the rod portion 21 of the injection piston 2.

Here, when mixing both of the blended raw materials 5a and 5b from the pores 30, the conventional mixing apparatus increases the speed of both the blended raw materials 5a and 5b to increase the degree of mixing and gives high energy to the collision. Both were stirred and mixed. In order to increase the speed and give high energy, in the conventional mixing apparatus, one compounding material pore 30 and another compounding material pore 30 provided in the opposing side wall 11 of the chamber 1 are each one. 12 and FIG. 13, the nozzle hole 80 for pores of the mixing apparatus, the mixing apparatus of FIG. 14 and the mixing apparatus of FIG. There was one nozzle hole 80 each. Both compounding raw materials were sprayed from both nozzle holes 80 with high discharge energy due to high pressure of a plunger or the like, and they both collided with each other and intended to be stirred and mixed.

  However, in order to realize the smooth flow of the mixed solution 6 and improve the mixing performance, the present inventors change the way of thinking and collide and mix the two kinds of compound raw materials 5 that react chemically, as shown in FIG. ~ As shown in Fig. 15, I thought that it would improve the mixing degree if both resin raw materials 5a and 5b hit the surface rather than hitting them in terms of points, and I worked on the development. And it came to this invention of the mixing apparatus and the shaping | molding method using the same. It was experimentally confirmed that the mixing degree of both blended raw materials 5a and 5b was increased and the smooth flow effect of the mixed liquid 6 was obtained.

In this mixing apparatus, a plurality of pores 30 of at least one of both blended raw materials 5a and 5b are provided within a range of two to four. The central axis 35 of two or more pores 30 out of the two to four intersects in the chamber 10. That is, the central axis 35 of the two, three, or four pores 30 intersects in the chamber 10. Further, the injection liquid of the blended raw material 5a sprayed from the pore 30 intersecting with the central axis 35 is set so as to intersect and self-collide in the chamber 10 prior to the collision with the other blended raw material 5b. Furthermore, among the two to four, the point R where the central axis 35 of two or more of the pores 30 intersects in the chamber 10 is more than the center of the chamber 1 in a plan view or a side view. As a point closer to the inner chamber wall 11 on the side, prior to the collision with the other blended raw material 5, self-collision in the chamber 10 is ensured. Prior to the collision with the other blended raw material 5, one blended raw material 5 crosses in the chamber 10 and collides with itself, whereby the one blended raw material 5 becomes dispersed. When at least one of the blended raw materials 5 collides with the other blended raw material 5 after being dispersed in this planar shape, the degree of mixing of both the blended raw materials 5a and 5b that are jetted oppositely in the chamber 10 is further increased. At the same time, the energy of the blended raw material 5 is lost by increasing the degree of mixing of the blended raw materials 5a and 5b, thereby realizing a smooth flow of the mixed liquid 6.
Here, the limitation to “provide a plurality of pores 30 within the range of 2 to 4” is that when the number of pores 30 exceeds 4, the diameter of the pores 30 must be reduced. This is because the nozzles are easily clogged by the aggregates. The number of the preferable pores 30 provided for each compounding raw material is two. In the present invention, “the central axis 35 of two or more pores 30 out of two to four intersects in the chamber 10”, for example, “the central axis 35 of the two pores 30 is in the chamber 10. “Crossed at” means that the central axis 35 of the pore 30 is a geometric three-dimensional space, and not only the central axis 35 of the two pores 30 reliably intersect, If the injection liquid of the blended raw material 5 injected from the two pores 30 intersects and substantially self-impacts even if it does not cross slightly at 10 of the two, the two pores 30 central axes 35 are considered to intersect within the chamber 10. The liquid blended raw material 5 containing the highly viscous raw material resin sprayed from the pores 30 is in the form of a thin flow line or beam, but if the spray liquid 50 of both blended raw materials 5a and 5b intersects and collides with itself, this This is because the same effect as the above can be obtained. This is because the degree of mixing of both blended raw materials 5a and 5b is increased, that is, high agitation is performed and a smooth flow is realized.

Specifically, in the conventional apparatus shown in FIGS. 12 to 15, the two mixed raw materials 5 a and 5 b are hit by points, for example, at least one of the two mixed raw material pores 30 is provided, and the two By crossing the central axis 35 of the pores 30 in the chamber 10 within the chamber 10, the two jetting liquids 50 relating to one of the blended raw materials sprayed from the two pores 30 are allowed to enter the chamber prior to the collision with the other blended raw material 5. Intersect 10 and make a self collision. Thereby, in the point which collides with the other mixing | blending raw material 5, since one mixing | blending raw material 5 has spread in planar shape, high mixing will be obtained. A plurality of pores 30 of both the raw materials 5 are provided in the range of 2 to 4, and the central axis 35 of at least two of the plurality of pores 30 intersects in the chamber 10. If it does in this way, in the point which both the mixing | blending raw materials 5a and 5b collide, both the mixing | blending raw materials 5 will spread in planar shape, and higher high mixing will be obtained. In addition, when the two chemically reacting raw materials 5a and 5b are a raw material containing a polyol component for a two-component polyurethane resin and a raw material containing an isocyanate component, Only a plurality of pores 30 may be provided in the range of two to four. Even with only the pores 30 on the isocyanate component side, high mixing equivalent to the case where a plurality of pores 30 for both blending raw materials are provided in the range of 2 to 4 can be obtained.
1 and 6, one nozzle component 3 in FIG. 2 is detachably fixed to both wall holes 12 provided in opposite side walls 11 of the chamber 1, and two nozzle components 3 are respectively attached to both nozzle components 3. Individual pores 30 are formed.

As shown in FIG. 2, the nozzle component 3 of the present embodiment is provided with two pores 30 in the main part 31 of the disk-like body so as to penetrate from the front side facing the chamber 10 to the opposite back side. The straight pores 30 formed of axial holes have an internal angle θ formed by intersecting both central axes 35 in the range of 30 ° to 90 °. Furthermore, the point R where the central axes 35 of both pores 30 intersect in the chamber 10 is closer to the pore side than the center of the chamber 1 (here, the central axis 19) in side view (or plan view) as shown in FIG. Both pores 30 are arranged so as to be closer to the inner wall 11 of the chamber. The length l of the shaft hole is determined so that straightness can be obtained in the injection liquid 50 of the blended raw material 5 injected from the pores 30, and the diameter d of the pore 30 is set so that the required speed of the injection liquid 50 is obtained. (Figure 4). In the present embodiment, a conical recess 32 is provided on the front side of the nozzle part 3, and the pores 30 penetrating vertically from the recess surface to the back surface side so that the two conditions of the straightness and the necessary speed of the spray liquid 50 are satisfied. Are provided at predetermined intervals in the vertical direction. “The crossing angle θ at which both the central axes 35 cross each other is within the range of 30 ° to 90 °” means that the spread (diffusion) after the collision of both blended raw materials 5a and 5b becomes insufficient when the angle is less than 30 °. Because. On the other hand, if the angle exceeds 90 °, it is difficult to form the pores 30 satisfying the above two conditions in the nozzle part 3 and the diffusion is insufficient.
A pan bottom 33 is provided on the back side of the nozzle part 3. The nozzle part 3 is detachably fixed to the wall hole portion 12, and more specifically, the nozzle holder 4 and the nut 4b containing the nozzle part 3 are screwed and fixed to the inner wall 11 around the wall hole 12 as shown in FIG. 30 is set so that the blended raw material 5 is injected into the chamber 10, but by the formation of the pan bottom, the blended raw material 5 passes smoothly through the guide holes 16 (or the guide holes 15) provided in the chamber 1 to the pores 30. Led to. FIG. 3 shows how the nozzle component 3 is mounted in the recess 40 of the nozzle holder 4 and is fixed to the wall hole portion 12. The tip of the nozzle holder 4 containing the nozzle component 3 is locked to the peripheral protrusion of the wall hole 12, and the nozzle holder 4 is screwed and fixed to the chamber wall that forms the guide hole 16. In this way, the blended raw material 5 moves from the introduction hole 16 and further from the intake port 43 of the nozzle holder 4 to the front end through the vertical hole 42, and the injection liquid 50 of the blended raw material 5 passes through the pores 30 of the nozzle part 3 in the chamber. 10 will be injected. Reference numeral 34 denotes a ring groove.

  FIG. 5 shows a nozzle component 3 that is different from the nozzle component 3 provided with two pores 30 of FIGS. The nozzle part 3 of FIG. 5 has two fine holes 30 with a predetermined interval in the vertical direction in the nozzle part 3 of FIG. 2, but in addition to this, the fine holes 30 are provided with a predetermined interval in the left-right horizontal direction. Two are provided. This is a nozzle part 3 in which four pores 30 are provided at 90 ° intervals on the concave surface around the cone apex of the conical recess 32. Although illustration is omitted, when there are three fine pores 30, the nozzle part 3 is provided with three fine pores 30 at 120 ° intervals on the concave surface around the cone apex of the conical recess 32.

  For example, in the case of the nozzle component 3 shown in FIG. 2, the two pores 30 are arranged up and down and attached to the wall hole 12 of the chamber 1 as shown in FIGS. Since the two fine holes 30 are attached in the vertical direction, after the self-collision, both the blended raw materials 5a and 5b spread and collide in a plane shape, and the collision surface becomes an ellipse as shown in FIG. The vertical length Y is longer than the horizontal length X, for example, an ellipse in which the positions of the two pores 30 are the focal points of the ellipse. When the two fine holes 30 are attached in the vertical direction, the elliptical area can be increased without being obstructed by the chamber inner wall 11, and the effect on mixing can be further improved, compared with the case where the two fine holes 30 are attached in the vertical direction.

  Next, the shaping | molding method using this mixing apparatus is demonstrated. One compounding material 5a and the other compounding material 5b relating to two kinds of chemically reacting liquid compounding materials 5a and 5b are injected into the chamber 10 through the pores 30 provided in the chamber side wall 11, respectively. 5a, 5b is a mixing device that collides and mixes, wherein a plurality of pores 30 related to at least one of the blended raw materials 5a among the two blended raw materials 5a, 5b are provided in a range of 2 to 4, And the central axis 35 of two or more pores 30 out of the two to four intersects in the chamber 10, and the injection liquid 50 of the blended raw material 5 a injected from the pores 30 intersecting the central axis 35 is obtained. A mixing device that self-impacts in the chamber 10 is used. Using this mixing device, the jet liquid of one blended raw material 5a out of both blended raw materials 5a and 5b is self-collised, and then collided with the other blended raw material 5b to mix both blended raw materials 5a and 5b. This is molded by being discharged into a mold 7 and cured. If the two chemically reacting raw materials 5 are a raw material containing a polyol component for a two-component polyurethane resin and a raw material containing an isocyanate component, by using this mixing apparatus, A high quality molded article can be manufactured by improving the smooth flow of the mixed liquid 6 from the high stirring and the discharge port 14. A point R where the central axes 35 of two or more of the four to four pores 30 intersect in the chamber 10 is closer to the chamber inner wall 11 on the pore side than the center of the chamber in plan view or side view. If it is a point, high agitation and smooth flow of the mixed liquid 6 can be realized with higher accuracy, which is more preferable in producing a high-quality molded product.

Hereinafter, since the performance comparison test was implemented using this mixing apparatus and the favorable result was obtained, it is demonstrated.
[Performance comparison test 1]
Table 1 summarizes the results of experiments using this mixing apparatus. After changing the number of pores 30 and the crossing angle θ provided in the nozzle component 3 so that one compounding raw material 5a and another compounding material 5b each collide with each other, both the compounding materials 5a and 5b spread in a planar shape. The shape of the colliding surface was investigated. Further, after mixing, the mixed liquid 6 is discharged from the discharge portion 13, and the scattering of unreacted liquid at the start of discharge and the state of the foam at the discharge start portion were examined.

The two chemically reacting raw materials 5 used in Table 1 are a raw material containing a polyol component for a two-component polyurethane resin and a raw material containing an isocyanate component. As the isocyanate side compounding raw material, a blended product of toluene diisocyanate / TDI-80 (viscosity, 3 cps @ 25 ° C.) and polymeric MDI (viscosity, 100 to 3000 @ 25 ° C.) was used. As the polyol-side blending raw material, a blended product of polyether polyol and graft polyol was used.
In Table 1, the number of pores 30 provided in each of the isocyanate-side blended raw material and the polyol-side blended raw material is shown as “number of nozzles”. For example, the number of nozzles in Example 1 is 2 and the term “nozzle of the present invention” includes polyol / isocyanate because the number of pores 30 for the isocyanate-side compounded raw material is 2, and the polyol-side compounded material It shows that the number of fine pores 30 is 2. When the “number of nozzles” in Example 5 is 4 and polyol is present in the “nozzle of the present invention” column, it indicates that only the number of nozzles on the polyol side (that is, pores) is 4. The number of pores 30 on the isocyanate side is 1. The number of nozzles is 4 as shown in FIG. 5, which is a concave surface around the apex of the conical recess 32, and four pores 30 are provided vertically and horizontally at 90 ° intervals. Further, the angle of the discharge hole in Table 1 is such that the central axis 35 of the upper pore 30 intersects the central axis 35 of the lower pore 30, and the central axis 35 of the upper pore 30 from the horizontal line passing through the intersection R. The elevation angle up to is shown, and corresponds to a value of 1/2 of the crossing angle θ. In Table 1, the shape at the collision surface of both compounding raw materials is shown as “spray shape”. The “spray shape” was observed by video shooting with a transparent acrylic resin lens provided in the chamber 10.
“The number of nozzles”, that is, the number of the pores 30 is 2 or 4, and the jetting liquid of the blended material sprayed from these pores self-impacts in the chamber prior to the collision with the other blended material, Improves scattering of unreacted liquid at the start of discharge and failure of foam at the start of discharge, and further mixing with an angle of the discharge hole of 15 ° to 45 °, that is, a crossing angle θ of 30 ° to 90 °. Good results were obtained in the apparatus.

[Performance comparison test 2]
As in the description of FIG. 16 above, a belt that moves horizontally is placed below the discharge unit 13 of the mixing apparatus, and the liquid mixture 6 that flows out from the chamber discharge unit 13 is poured into the belt, so that the appearance properties of the cured product are improved. It investigated (FIGS. 9-11). The two types of compounding raw materials 5 that react chemically were the same as in Example 1 and used a compounding material containing a polyol component for a two-component polyurethane resin and a compounding material containing an isocyanate component. In the mixing apparatus of FIG. 9, only two pores 30 for the blending material containing the isocyanate component are provided, and the pores 30 for the blending material containing the polyol component are made one. In the mixing apparatus shown in FIG. 10 and FIG. 11, two pores 30 for blending raw material containing an isocyanate component and two pores 30 for blending raw material containing a polyol component are provided. Where two pores 30 are provided, the central axis 35 of both pores 30 intersects in the chamber 10, and the injection liquid of the blended raw material 5 sprayed from the pores 30 is in contact with the other blended raw material 5. Prior to the collision, the self-collision is set in the chamber 10. The crossing angles θ at which the central axes 35 of both pores 30 according to FIGS. 9 to 11 cross each other were set to 60 °. In FIG. 10, the two pores 30 for isocyanate and polyol are both arranged in the vertical direction. In FIG. 11, the two pores 30 for isocyanate are installed in the horizontal direction. 9 to 11, as in FIG. 17, the flow direction of the raw material is from the right side to the left side in the drawing and is the opposite direction to FIG. 16, the right side portion of the drawing is the head, and the left side portion of the drawing is It has a tail.
In the tests of FIGS. 9 to 11 and FIG. 17, the flow rate and pressure of the injection liquid 50 of the blended raw material 5 injected from the pores 30 are substantially the same. In the conventional mixing apparatus of FIG. 17, the number of blending material pores 30 containing an isocyanate component and one number of blending material pores 30 containing a polyol component are each provided. The product shown in FIG. 17 shows protrusions and voids, whereas the products shown in FIGS. 9 to 11 have no such defects and have an excellent quality appearance. (1) It was confirmed that the mixed liquid 6 was highly stirred, and (2) the mixed liquid 6 from the discharge port 14 was a smooth flow.

  The mixing apparatus configured as described above and a molding method using the mixing apparatus are provided with a plurality of at least one of the pores 30 in the range of two to four of the blended raw materials 5a and 5b, and more. By simply setting the central axis 35 of at least two of the pores 30 so as to intersect with each other in the chamber 10, high stirring of the mixed solution 6 and smooth flow of the mixed solution 6 from the discharge port 14 are improved. Can be extremely beneficial. Since the structure is simple, the cost of the apparatus can be greatly reduced as compared with the conventional apparatus shown in FIGS. Moreover, even in the case of an existing mixing device, the high stirring of the mixed solution 6 and the smooth flow of the mixed solution 6 from the discharge port 14 can be easily improved by simply replacing the nozzle component 3 with the nozzle member 8. Can be made. In addition, the baffle pin 91 as shown in FIGS. 14 and 15 and the extra operation process of the cleaning member 92 are not added, and the apparatus is excellent in productivity. Of course, if the configuration of the present invention is added to the conventional apparatus shown in FIGS. 15 and 16, further high agitation and smooth flow can be realized. In particular, in the manufacture of mold products (molded products), the mixed reaction liquid that is uniformly mixed and stirred is supplied in all discharge states from the start of discharge to the stop of discharge. Defects such as bottoming can be reduced.

  The present invention is not limited to those shown in the above-described embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. The shape, size, number, and the like of the chamber 1, the injection piston 2, the nozzle part 3, the nozzle holder 4, the molding die 7, etc. can be appropriately selected according to the application. For example, in addition to injecting two kinds of chemically blended raw materials that react chemically into the chamber 10 from the pores 30 provided in the chamber side wall 11 respectively, blending aids such as a foam stabilizer and a catalyst that are not involved in the reaction, In some cases, the inside of the chamber 10 may be sprayed from pores different from the two types of blended material pores 3. Even in such a case, a plurality of the pores 30 related to at least one of the two kinds of blended raw materials are provided in the range of 2 to 4, and two or more of the 2 to 4 are further provided. The center axis 35 of the fine pore 30 intersects in the chamber 10, and the injection liquid 50 of the blended material injected from the pore 30 intersecting the center axis self-acts in the chamber 10 prior to the collision with the other blended material. Any collision will be within the scope of the present invention.

1 is a schematic longitudinal sectional view of a lower part of the mixing head device according to an embodiment of the present invention. (A) is a longitudinal cross-sectional view of the nozzle component of FIG. 1, and (b) is a right side view of (a). FIG. 2 is an exploded explanatory view showing a state where a nozzle part and a nozzle holder are mounted in a wall hole of the chamber of FIG. 1. It is the elements on larger scale of the nozzle component of FIG. (A) is a longitudinal sectional view of a nozzle component different from the nozzle component of FIG. 2, and (b) is a right side view (b) of (b). It is explanatory drawing which shows the positional relationship of the nozzle components attached to the side wall which the chamber of a mixing head apparatus opposes. FIG. 7 is a schematic view of the collision surface formed by the collision of jetting liquids of both compounding raw materials sprayed from the pores of the nozzle part of FIG. 6, and is a view taken along the line IV-IV in FIG. 6. It is explanatory drawing which shows the positional relationship of the nozzle components attached to the side wall which the chamber of a mixing apparatus opposes, and is another aspect figure different from FIG. In the test of Example 2, it is an external appearance image processing figure of the product which poured the liquid mixture from the discharge part on the moving belt, and was hardened. FIG. 10 is an appearance image processing diagram of a product obtained by changing the conditions from those in FIG. 9 in the test of Example 2 and allowing the liquid mixture to flow from the discharge unit onto the moving belt and curing. FIG. 11 is an external appearance image processing diagram of a product obtained by changing the conditions in FIGS. 9 and 10 in the test of Example 2 and allowing the liquid mixture to flow from the discharge unit onto the moving belt and curing. It is explanatory sectional drawing of a prior art. It is a principal part enlarged view of FIG. It is explanatory sectional drawing of a prior art. It is explanatory sectional drawing of a prior art. It is explanatory drawing which obtains the product which poured the liquid mixture from the discharge part on the moving belt, and was hardened. It is an external appearance image processing figure of the product obtained corresponding to the product shown in FIG. 16 using the mixing head apparatus of a prior art.

Explanation of symbols

1 chamber 10 inside chamber 11 side wall 18 center 19 central axis (center)
3 Nozzle parts 30 Pore 5 Compounding material 5a One compounding material 5b Other compounding material 7 Mold (mold)

Claims (5)

In a mixing head device that injects two kinds of chemically mixed liquid raw materials into the chamber from the respective pores provided on the side walls of the chamber and collides and mixes both the raw materials,
A plurality of the pores related to at least one blended raw material among the two blended raw materials are provided in the range of 2 to 4, and the central axis of two or more pores among the 2 to 4 is provided. A mixing head device, characterized in that the jetting liquid of the blended raw material sprayed from the pore intersecting in the chamber and intersecting the central axis thereof self-impacts in the chamber prior to the collision with the other blended raw material. The mixing head device according to claim 1, wherein a nozzle part is detachably fixed to a wall hole provided in a side wall of the chamber, and the fine hole is formed in the nozzle part. The mixing head device according to claim 2, wherein two fine holes are formed in the nozzle component, and an intersection angle (θ) at which the central axes of the two fine holes intersect is within a range of 30 ° to 90 °. A mixing head that injects one compounded raw material and two other compounded raw materials related to two chemically reacting raw materials into the chamber from the respective pores provided on the side walls of the chamber, and collides both the mixed materials. The apparatus is provided with a plurality of pores in the range of two to four of at least one of the two blended raw materials, and two or more fine pores of the two to four. Using a mixing head device in which the center axis of the hole intersects in the chamber and the jetting liquid of the blended material sprayed from the pore intersecting the center axis self-impacts in the chamber, The mixing head is characterized by self-collising the jetting liquid of the blended raw material, then colliding with the other blended raw material, mixing both blended raw materials, and then discharging the mixture into a mold and curing it. Forming method using the apparatus. 6. A molding method using a mixing head device according to claim 5, wherein the two chemically reacting raw materials are a raw material containing a polyol component for a two-component polyurethane resin and a raw material containing an isocyanate component.