JPH0531739A - Mixing head - Google Patents

Abstract

PURPOSE:To provide a mixing head capable of emitting a mixed material without scattering the same. CONSTITUTION:A mixing head 10 contains a case 12 and a passage 14 for mixing a plurality of materials to emit the same to the outside of the mixing head 10 is formed in the case 12. Jet nozzles 22 are formed in the case 12 in mutually opposed relationship so as to be opened toward the passage 14 and the respective materials are injected in the passage 14 by the jet nozzles 22. Further, stirring chambers 28 are formed in the case 12 in mutually opposed relationship so as to communicate with the passage 14 in the state crossing the axial direction of the passage 14 at a right angle. In this mixing head 10, the opening parts of the jet nozzles 22 are arranged within the range of the openings of the stirring chambers 28 in the axial direction of the passage 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing head, and more particularly to a mixing head used for mixing an isocyanate compound and a polyol to obtain a urethane foam and injecting the mixture into, for example, a mold. ..

[0002]

2. Description of the Related Art FIG. 9 is a schematic view of a main part of an example of a conventional mixing head which is the background of the present invention. The mixing head 1 comprises a passage 2. The rod 3 is inserted into the upper portion of the passage 2. The rod 3 reciprocates in the passage 2. A hydraulic cylinder (not shown) is attached to the rod 3 to drive it. Furthermore, this mixing head 1 is formed with two injection nozzles 4 and 5 which open towards the passage 2 and inject the material into the passage 2. The material sent to the injection nozzles 4 and 5 is injected into the passage 2. In this mixing head 1, the rod 3 moves up and moves to the top dead center. At this time, the material is injected into the passage 2 from the two injection nozzles 4 and 5, and the passage 2
The two materials collide and mix within. Then, the mixed material is discharged to the outside of the mixing head 1 through the passage 2 and injected into, for example, the mold 6 placed under the mixing head 1. After that, the material remaining in the passage 2 is pushed out of the mixing head 1 by the rod 3, and the inside of the passage 2 is cleaned.

[0003]

However, in the conventional mixing head 1 shown in FIG. 9, a plurality of materials are supplied from the two injection nozzles 4 and 5 to, for example, 100 to 200 kg / c.
Since it is injected into the passage 2 at a high pressure of m ² , the materials mixed in the passage 2 are discharged from the passage 2 to the outside of the mixing head 1 while maintaining high kinetic energy at high pressure and high speed.
Therefore, when injecting the mixed material from the mixing head 1 into the mold, the mixed material is scattered and smooth injection cannot be performed. Therefore, FIG.
In the mixing head 1 shown in (1),
Product defects and product contamination can occur, and work safety is jeopardized.

Therefore, a main object of the present invention is to provide a mixing head capable of ejecting mixed materials without scattering.

[0005]

The present invention comprises a case,
A passage for mixing a plurality of materials in the case and discharging the mixture to the outside, an injection nozzle for injecting the material into the passage formed to face each other so as to open toward the passage, and a shaft of the passage. Communicating with the passage so that it is orthogonal to the direction,
Further, the mixing head includes a stirring chamber facing each other, and the opening of the injection nozzle is arranged within the range of the opening of the stirring chamber when viewed in the axial direction of the passage.

[0006]

The plurality of materials jetted from the facing jet nozzles collide and are mixed in the passage. Further, the mixed materials flow into the stirring chamber, and turbulent flow occurs in the stirring chamber. Due to the generation of the turbulent flow, the kinetic energy of the material is converted into the vortex energy.

[0007]

According to the present invention, the kinetic energy of the material is converted into the energy of the vortex, so that the flow velocity of the material is reduced. Therefore, the mixed material can be discharged without scattering. Therefore, when the mixing head according to the present invention is used, it is possible to prevent product defects and product contamination during the casting operation into the mold, and the safety of the operation is not threatened. Furthermore, since turbulent flow is generated in the stirring chamber, the stirring property of the material is improved, and a product of uniform material can be obtained.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a side view illustrative view showing an embodiment of the present invention, and FIG. 1B is an essential part illustration thereof. 2 (A) is a schematic plan view of the mixing head shown in FIG. 1 (A), and FIG. 2 (B) is a schematic view of its essential part.

The mixing head 10 includes a case 12. Inside the case 12, for example, a column-shaped passage 14 is formed in the vertical direction. A passage rod 16 is inserted into the passage 14. On the side surface of the passage rod 16, for example, two groove portions 16a and 16b are formed. The two groove portions 16a and 16b are used for the passage rod 1
6 are formed to face each other in the diametrical direction. The passage rod 16 reciprocates in the passage 14. A passage hydraulic cylinder 18 for driving the passage rod 16 is attached to the upper portion of the case 12. The passage hydraulic cylinder 18 is attached to one end of the passage rod 16 in the axial direction. Then, the piston 20 of the passage hydraulic cylinder 18 and the passage rod 16 are connected.

Further, in the case 12, two injection nozzles 22 opening toward the passage 14 are formed. Two
The two injection nozzles 22 are formed to face each other in a direction orthogonal to the axial direction of the passage 14. Two injection nozzles 22
As shown in FIG. 3 (B), the material pipes 24 are communicated with each other. The material that has entered from these material tubes 24 is injected into the passage 14 through the injection nozzle 22. In addition, at a distance from the injection nozzle 22,
Two outlets 26 that open into the passage 14 are formed.

Further, in the case 12, two stirring chambers 28 opening toward the passage 14 are formed. The two stirring chambers 28 are formed to have the same cross-sectional area, and are formed to be larger than the cross-sectional area of the passage 14. Each of the two stirring chambers 28 is formed in a direction orthogonal to the axial direction of the passage 14. The two stirring chambers 28 are formed so as to face each other. Each of the two stirring chambers 28 communicates with the passage 14. The two stirring chambers 28 are arranged at positions displaced by 90 ° in the circumferential direction of the passage 14 with respect to the injection nozzle 22.

The stirring chamber 28 in the circumferential direction of the passage 14
The arrangement angle between the nozzle and the injection nozzle 22 can be changed as appropriate. Further, the two injection nozzles 22 may be arranged at positions slightly displaced in the axial direction of the passage 14 depending on the material to be injected. In this case, the two injection nozzles 22 are arranged within the range of the opening portions of the two stirring chambers 28 facing each other as viewed in the axial direction of the passage 14.

A stirring chamber rod 30 is inserted into each of the two stirring chambers 28. Rod 3 for those stirring chambers
0 reciprocates in the stirring chamber 28. Agitating chamber hydraulic cylinders 32 for driving the agitating chamber rod 30 are attached to both sides of the case 12, respectively. Each of these stirring chamber hydraulic cylinders 32 is attached to one end of the stirring chamber rod 30 in the axial direction. The piston 34 of the hydraulic cylinder 32 for the stirring chamber and the rod 30 for the stirring chamber are connected to each other.

Next, the operation of the mixing head 10 will be described. In this mixing head 10, as shown in FIGS. 3A and 3B, a plurality of materials A and B are sent from a material tank (not shown) through a material pipe 24 by a pump or the like to the injection nozzle 22. Be done. This mixing head 1
0 is used, for example, to obtain urethane foams, in which case materials A and B are isocyanate compounds and polyols. The materials A and B are each adjusted to an appropriate temperature by a heat exchanger (not shown).

In the mixing head 10, normally,
If the material is not ejected out of the mixing head 10, FIG.
As shown in (A), FIG. 3 (A), and FIG. 3 (B), the stirring chamber rods 30 in the two stirring chambers 28 reach the bottom dead centers in the stirring chambers 28, respectively. Then, it is pushed out to the passage 14 side. Further, the passage rod 16 is pushed to the lower portion in the passage 14, and the material pipe 24 and the discharge port 26 are provided in the passage 14 so that the passage rod 16
Are communicated with each other by the groove portions 16a and 16b. Therefore, the material A sent from the material tank (not shown)
And B are from the material pipe 24 to the groove portion 1 of the passage rod 16.
It is guided to 6 a and 16 b and further to the discharge port 26. At this time, the materials A and B are mixed in the mixing head 10
And between the material tank.

In the mixing head 10, when the materials A and B are mixed and discharged out of the mixing head 10, first, as shown in FIGS. 4 (A) and 4 (B), they face each other. A space is provided in the two stirring chambers 28 by pulling back the stirring chamber rods 30 in the two stirring chambers 28 to the top dead center side. Subsequently, as shown in FIGS. 5A and 5B, the passage rod 16 in the passage 14 is pulled back upward. At this time, the injection nozzle 22 opens toward the passage 14, and the discharge port 26 is blocked by the passage rod 16. Therefore, the materials A and B are, for example, 1 from the injection nozzle 22 into the passage 14 as shown in FIGS. 6 (A) and (B).
It is injected at a pressure of 00 to 200 kg / cm ² . Then, the materials A and B injected into the passage 14 are
Collision in 4 and mixing.

At this time, the mixed materials A and B are
It flows into the two stirring chambers 28 and causes a turbulent flow. As shown in FIG. 7, the mixed material flowing into the two stirring chambers 28 converts kinetic energy into vortex energy in the two stirring chambers 28, and the flow velocity of the colliding materials is reduced at high pressure and high speed. Then, the material whose flow velocity has been reduced is returned to the inside of the passage 14 again.

Further, the material decelerated in the two stirring chambers 28 is discharged to the outside of the mixing head 10 through the passage 14. Then, the material discharged to the outside of the mixing head 10 is injected into, for example, an open mold.

Thereafter, in the mixing head 10, as shown in FIG. 8, the two stirring chamber rods 30 are pushed out toward the passage 14 side to clean the residues in the stirring chambers 28. Subsequently, the passage rod 16 is pushed downward to clean the residue in the passage 14. At this time, in the mixing head 10, the material pipe 2
4 and the discharge port 26 are communicated with each other by the groove portions 16a and 16b of the passage rod 16, and again the materials A and B are
Circulate between the mixing head 10 and the material tank.

In this mixing head 10, the jet nozzle 22
When the materials A and B injected from are mixed, the mixed material is agitated by flowing into the agitation chamber 28, and its flow velocity is reduced. Then, the decelerated material is smoothly discharged to the outside of the mixing head 10 through the passage 14. Therefore, when the mixing head 10 is used, product defects and product contamination can be prevented, for example, in the work of casting into a mold, and the safety of the work is not threatened. Furthermore, since a turbulent flow is generated in the stirring chamber 28, the stirring property of the material is improved,
A product of uniform material can be obtained.

[Brief description of drawings]

FIG. 1A is a schematic side view showing an embodiment of the present invention, and FIG.

2A is a schematic plan view of the mixing head shown in FIG. 1A, and FIG. 2B is a schematic view of a main part thereof.

FIG. 3A is a schematic plan view of a main part showing a state in which materials circulate in the mixing head shown in FIGS. 1A and 2A, and FIG. 3B is a side view schematic view of the main part. Is.

FIG. 4 (A) is a side view solution diagram showing a state in which the stirring chamber rod is pulled back to mix the materials in the mixing head shown in FIGS. 1 (A) and 2 (A);
(B) is a schematic plan view of the relevant part.

5A is a side view showing a state in which materials are mixed in the mixing head shown in FIGS. 1A and 2A, and FIG. 5B is a view showing a main part thereof. ..

6A is a schematic plan view showing a state in which materials are mixed in the mixing head shown in FIGS. 1A and 2A, and FIG. 6B is a schematic view of a main part thereof. ..

FIG. 7 is a schematic side view showing the state in which the mixed materials flow into the two stirring chambers, are returned to the passages, and are discharged to the discharge side.

FIG. 8 is a side view solution diagram showing a state in which a residue in a stirring chamber and a passage is cleaned.

FIG. 9 is a side view solution diagram of an essential part showing an example of a conventional mixing head which is a background of the present invention.

[Explanation of symbols]

 10 Mixing Head 12 Case 14 Passage 22 Injection Nozzle 28 Stirring Chamber

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Claims (1)

Claim: What is claimed is: 1. A case, a passage for mixing a plurality of materials in the case and discharging the mixture to the outside, and the material formed to face each other so as to open toward the passage. An injection nozzle for injecting into the passage, and communicating with the passage so as to be orthogonal to the axial direction of the passage,
Further, the mixing head includes stirring chambers facing each other, and the opening portion of the injection nozzle is arranged within a range of the opening portion of the stirring chamber when viewed in the axial direction of the passage.