JPH07171825A - Mixing head - Google Patents

Abstract

PURPOSE:To provide a simple and small-size mixing head and realize an ideal mixing ratio by changing over the connection of a material lead-in conduit and a material lead-out conduit in conjunction with the reciprocation of a cleaning rod for cleaning the inside of a mixing chamber. CONSTITUTION:A T-shaped lower head 112 is fixed to the bottom of a body 72 of a mixing head 70. In the center of the lower head 112, a cylindrical module 114 is nested. A mixing chamber 116 is vertically provided through the center of the module 114. A cleaning rod 126 is provided in the mixing chamber 116 so as to be vertically slid by a cylinder 78. The upper end of the cleaning rod 126 is fixed to a rack member 80. By the reciprocation of the rack member 80, pinions 82, 84 are rotated, and spindles 86, 88 and inner connecting pipes 90, 92 are rotated. Thus, lead-in conduits 100, 102 and lead-out conduits 104, 106 are changed over. Liquid A, B are supplied through supply pipes 122, 124 to be jetted into the mixing chamber 116, or discharged outside. Therefore, the size of the head 70 can be reduced, and an ideal mixing ratio can be realized.

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 for injecting phenol foam into the interior of a flame retardant board for building materials.

[0002]

2. Description of the Related Art A foam material such as phenol foam is injected into a flame-retardant board for building materials for the purpose of improving heat insulation and soundproofing effects. A conventional mixing head for this purpose has a rotary mixer for mixing and stirring, for example, liquid A composed of a phenol resin and a foaming agent and liquid B composed of a curing agent such as a dilute acid. ,
For example, it includes a bead-shaped stirring rotor. In such a conventional mixing head, the liquid A and the liquid B fed into the mixing chamber are mixed and stirred by the rotary mixer to form phenol foam. Phenolic foam is discharged from the nozzle of the mixing head and injected into the interior of the flame-retardant board for building materials. When the injection work is completed, the phenol foam remaining in the mixing head is discharged by circulating a solvent or the like through a path such as a rotary mixer.

However, when a cleaning process with a solvent is required, the production process becomes complicated and a disaster prevention problem occurs. Therefore, it is considered to use a collision stirring type mixing head which does not require cleaning with a solvent. The collision stir mixing head mixes and stirs the liquid A containing the main agent and the liquid B containing the curing agent in opposite directions in a mixing chamber to mix and stir, and is used for a resin having a relatively low viscosity. In this collision stirring type mixing head, a piston rod for pushing out and discharging the residual liquid is arranged in the mixing chamber so as to be reciprocally movable. Further, in the conventional collision stirring type mixing head, valves driven by, for example, an air cylinder or the like are provided in the flow paths of the A liquid and the B liquid, respectively. These valves are for switching the flow paths of the A liquid and the B liquid.

In such a conventional mixing head of the collision agitation system, the liquid A and the liquid B are oppositely injected into the mixing chamber, collision-agitated and discharged as phenol foam. When collision stirring is not performed, the flow path is switched by the valve, and the liquids A and B are circulated between the respective tanks and the mixing head. Then, the residual liquid of the phenol foam in the mixing chamber is pushed out and discharged by the piston rod.

[0005]

However, in the conventional collision stirring type mixing head, the piston rod and the valve are driven by the cylinders provided separately. Therefore, the mechanism of the mixing head becomes complicated and the size becomes large. Further, since the piston rod and the valve are driven separately, it is difficult to match the timing of the initial flow and the final flow of the liquid A and the liquid B,
An appropriate mixing ratio could not be maintained, and a satisfactory cured product could not be obtained especially in the initial and final flows.

Therefore, a main object of the present invention is to provide a mixing head whose mechanism can be simplified and miniaturized and which can mix and discharge materials at a suitable mixing ratio.

[0007]

According to the present invention, there is provided a mixing chamber for mixing a plurality of materials, a cleaning rod for reciprocating in the mixing chamber in a longitudinal direction thereof, and a cleaning rod for cleaning the inside of the mixing chamber. A cylinder for reciprocating the cleaning rod, a first conduit for introducing a material to be mixed from the outside, and a second conduit for injecting the material introduced through the first conduit into the mixing chamber. A third conduit for discharging the material introduced through the first conduit to the outside, and a fourth conduit for connecting the first conduit with one of the second conduit and the third conduit And the reciprocating movement of the cleaning rod,
And a switching means for switching the connection by the conduit of. Further, the switching means may include a rack member connected to the cleaning rod, and a pinion member that is provided so as to interlock with the rack member and that rotates the fourth conduit to switch the connection.
Further, a displacement means for displacing the top dead center of the piston of the cylinder may be included.

[0008]

When mixing and discharging a plurality of materials, the cleaning rod is moved by the cylinder in the direction of being pulled out from the mixing chamber, and the inside of the mixing chamber is opened for mixing the materials. Then, in conjunction with the movement of the cleaning rod, one end of the fourth conduit is connected to the first conduit and the other end of the fourth conduit is connected to the second conduit. Then, through the first conduit, the materials to be mixed are introduced. The introduced material is circulated to the second conduit through the fourth conduit and injected into the mixing chamber. The jetted materials are mixed in the mixing chamber and discharged.

On the other hand, at the time of cleaning the inside of the mixing chamber, the cleaning rod is moved by the cylinder in the direction of insertion into the mixing chamber. By the movement of the cleaning rod, the mixed liquid remaining in the mixing chamber is pushed out and discharged. Also, in conjunction with the movement of the cleaning rod, one end of the fourth conduit is connected to the first conduit and the other end of the fourth conduit is connected to the third conduit by the switching means. Then, the material introduced from the first conduit is led to the outside of the mixing head through the fourth conduit and the third conduit.

When a rack member is connected to the cleaning rod and a pinion member is provided so as to interlock with the rack member, the rack member and the pinion member work together to linearly move the cleaning rod. Is converted into rotational motion. And, with the rotation movement,
The fourth conduit is rotated and the connection is switched.

Further, when the displacement means for displacing the top dead center of the piston of the cylinder is included, the top dead center of the piston of the cylinder is upward by the displacement means, that is, the direction in which the cleaning rod is pulled out from the mixing chamber. Is displaced to. Then, with the displacement of the piston, the cleaning rod is moved further upward from the normal position. In this case, since the cleaning rod is moved away from the vicinity of the mixing chamber, the mixing head is easily disassembled in the vicinity of the mixing chamber, and the workability of maintenance is improved.

[0012]

According to the mixing head of the present invention, the switching means interlocking with the reciprocating movement of the cleaning rod switches the flow path of the material, so that the initial flow and the final flow of the material injected into the mixing chamber are completed. The flow timing is easy to match, and the materials can always be mixed in a suitable mixing ratio. Further, since the cleaning rod and the switching means can be driven by one cylinder, the mixing head can be simplified and downsized.

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

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a mixing head. First, a phenol foam injection device to which an embodiment of the present invention is applied will be described. FIG. 1 is an illustrative view showing an example of an apparatus to which an embodiment of the present invention is applied. The phenol foam injection device 10 includes a substantially cylindrical first tank 12. The first tank 12 is for storing the liquid A in which a main component made of a phenol resin and a foaming agent made of a low boiling point solvent are mixed.
The first tank 12 is wrapped with a heat insulating material 14 in order to maintain a constant temperature inside the tank. In addition, the first tank 12
A stirring device 16 for constantly stirring the liquid A is provided in the tank. The stirring device 16 includes a propeller for stirring the liquid A, a motor for rotating the propeller, a propeller shaft for connecting the motor and the propeller, and the like. Further, the first tank 12 has a liquid outlet 12a for the A liquid and a liquid inlet 12b for the circulating A liquid.

Also, the phenol foam injection device 1
0 includes a boost pump 22 for sucking and delivering the high-viscosity liquid A from the first tank 12. The first tank 12 and the suction port of the boost pump 22 are connected by a conduit 24. One end of the conduit 26 is connected to the outlet of the boost pump 22. The other end of the conduit 26 is bifurcated. One branch of the conduit 26 is connected to a conduit 28 for connecting with a metering pump 42 described later. The other branch of the conduit 26 is connected to one end of the cock 30. The cock 30 is for blocking or circulating the path of the liquid A.

One end of a conduit 32 is connected to the other end of the cock 30. The other end of the conduit 32 is bifurcated. One of the two branches of the conduit 32 is connected to a conduit 34 for connecting to a mixing head 70 described later. The other of the two conduits 32 branched off is connected to the liquid inlet 12b of the first tank 12 via a conduit 38. Thus
The first tank 12, the boost pump 22, the cock 30,
A first circulation path 40 is formed from the conduits 24, 26, 32 and 38.

Also, the phenol foam injection device 1
0 includes a metering pump 42 for delivering a predetermined amount of A liquid at high pressure. As the metering pump 42, for example, a high-pressure multi-cylinder axial pump is used. The inlet of the metering pump 42 is connected to the outlet of the boost pump 22 via the conduit 28 and the conduit 26. One end of a conduit 44 is connected to the outlet of the metering pump 42. The other end of the conduit 44 is connected to a heater 46 as a heating means for heating the liquid A to reduce its viscosity. The heater 46 includes a conduit 46a for circulating the liquid A. Further, the heater 46 includes a heating element 46b formed by being wound around the conduit 46a. Heater 4
The other end of the conduit 46 a of No. 6 is connected to a mixing head 70 described later via a conduit 48. Therefore, the high-pressure liquid A, which has been heated by the heater 46 and whose viscosity has been lowered, passes through the conduit 48 and is mixed with the mixing head 70 described later.
It is sent inside.

During circulation of the liquid A, the high-pressure liquid A passed through the mixing head 70, which will be described later, is returned to the first tank 12 through the conduits 34 and 38. From the first tank 12, boost pump 22, metering pump 42, heater 46, mixing head 70, and conduits 24, 26, 28, 44, 48, 34, 38 to the second
A circulation path 50 of The second circulation path 50 is
When the discharge work of phenol foam is completed, the A liquid remaining inside each conduit and inside the mixing head 70 is
It is for returning to the first tank 12.

Further, the phenol foam injection device 10
Includes a second tank 52. The second tank 52 is for storing the B liquid containing a curing agent such as a dilute acid. The second tank 52 has at least two openings, one of which serves as the liquid B liquid outlet 52a and the other of which serves as the liquid B liquid inlet 52b. One end of the conduit 54 is connected to the liquid outlet 52a. The other end of the conduit 54 is connected to the suction port of the metering pump 56. The metering pump 56 is for delivering the liquid B at a high pressure by a predetermined amount. The metering pump 56 is made of an acid resistant material such as Hastelloy (trade name). The second tank 52 may be provided with a stirrer like the first tank 12.

One end of a conduit 58 is connected to the outlet of the metering pump 56. The other end of the conduit 58 is connected to a mixing head 70 described later. Therefore, the high-pressure B liquid delivered by the metering pump 56 is delivered through the conduit 58 into the mixing head 70 described later. The mixing head 70, which will be described later,
It is connected to the liquid inlet 52 b of the second tank 52 via the conduit 60. Therefore, when circulating the B liquid, the B liquid that has passed through the mixing head 70, which will be described later, is returned to the second tank 52 through the conduit 60. Second tank 5
2, the metering pump 56, the mixing head 70, and the conduits 54, 58, 60 form a third circulation path 62. The third circulation path 62 is for returning the liquid B remaining in the respective conduits and the mixing head 70 to the second tank 52 when the discharging operation of the phenol foam is completed.

Next, the mixing head 70 of this embodiment will be described with reference to FIGS. The mixing head 70 includes a body 72. A piston rod 76 is arranged above the substantially central portion of the main body 72 so as to be slidably inserted in the vertical direction of the main body 72. The piston rod 76 is vertically driven by the cylinder 78. In this specification, the upward direction of the mixing head 70 refers to the direction of the cylinder 78 described later as viewed from the central portion of the mixing head 70, and the downward direction refers to the direction of the mixing chamber 116 described later. Cylinder 78
For example, a hydraulic cylinder can be used. The cylinder 78 includes a piston 140 therein. A piston ring 142 is provided on the outer circumference of the piston 140.
Is installed. The piston rod 76 is the piston 140
It is fixed so as to extend vertically downward from the central portion of one surface. The lower end side of the cylinder 78 is sealed by a flat annular rod cover 144. A ring-shaped packing 146 is provided on the outer circumference of the rod cover 144, and a ring-shaped packing 148 is provided on the inner circumference of the rod cover 144.
Is provided. The rod cover 144 and the inner wall of the cylinder 78 are sealed by the packing 146, and the rod cover 144 and the piston rod 76 are sealed by the packing 1.
Sealed in a slidable state by 48.

A substantially rectangular parallelepiped rack member 80 is integrally fixed to the lower end of the piston rod 76 as a part of the switching means. Racks 80a and 80b extending in the vertical direction are formed in parallel on the side walls of the rack member 80 on one side and the other side in the width direction.

As shown in FIG. 4, substantially disk-shaped pinion members 82 and 84 are arranged on both sides of the rack member 80. The pinion members 82 and 84 have the rack 8 on their outer circumferences.
It has pinions 82a and 84a corresponding to 0a and 80b. The pinion members 82 and 84 are arranged on both sides of the rack member 80 such that the racks 80a and 80b and the pinions 82a and 84a are engaged with each other. And the pinion member 8
The central axis of the one main surface of the members 2, 84 is rotatably supported by the main body 72. Further, for example, cylindrical spindles 86, 88 are provided on the central axes of the other main surfaces of the pinion members 82, 84.
One end of each is fixed. Inside the spindles 86, 88, as a fourth conduit, a substantially L-shaped connecting pipe 90,
92 are formed respectively. One ends of the connecting pipes 90 and 92 open to the other end surfaces of the spindles 86 and 88, respectively, and the other ends open to the peripheral walls of the spindles 86 and 88, respectively.

Further, as shown in FIGS. 2 to 4, a linear introduction pipe 100 is formed in the main body 72 of the mixing head 70 as a first conduit for introducing the liquid A into the mixing head 70. To be done. One end of the introduction pipe 100 extending substantially horizontally is opened in the front wall of the main body 72 and is connected to the conduit 48 of the phenol foam injection device 10. The other end of the introduction pipe 100 is connected to a connection pipe 90 that is open at the other end surface of the spindle 86. Similarly, in the mixing head 70, a linear introduction pipe 10 is provided as another first conduit for introducing the liquid B into the mixing head 70.
2 is formed. One end of the introduction pipe 102 opens to the front wall of the main body 72 and is connected to the conduit 58 of the phenol foam injection device 10. The other end of the introduction pipe 102 is connected to a connection pipe 92 that is open at the other end surface of the spindle 88.

Further, in the main body 72 of the mixing head 70, a straight lead-out pipe 104 is formed as a third conduit for leading out the liquid A from the inside of the mixing head 70. One end of the outlet pipe 104 opens at one side wall of the main body 72 in the width direction and is connected to the conduit 34 of the phenol foam injection device 10. The other end of the outlet pipe 104 contacts the peripheral wall of the spindle 86. Then, as shown in FIG. 4, the other end of the lead-out pipe 104 is connected to the connecting pipe 90 opened in the peripheral wall of the spindle 86 by rotating the spindle 86.

Similarly, in the mixing head 70,
A linear outlet pipe 106 is formed as another third conduit for leading out the liquid B from the inside of the mixing head 70. One end of the outlet pipe 106 opens to the other side wall of the main body 72 in the width direction and is connected to the conduit 60 of the phenol foam injection device 10. The other end of the outlet pipe 106 contacts the peripheral wall of the spindle 88. Then, as shown in FIG. 4, the other end of the lead-out pipe 106 is connected to the connecting pipe 92 opened in the peripheral wall of the spindle 88 by rotating the spindle 88.

As shown in FIGS. 2 and 3, a substantially T-shaped lower head 112 is disposed below the main body 72.
The lower head 112 is integrally fixed to the main body 72. The lower head 112 can be removed from the main body 72 for maintenance. At the center of the lower head 112,
The substantially cylindrical module 114 is fixed so as to be fitted therein. The module 114 has a mixing chamber 1
16 is for forming. The mixing chamber 116 is formed so as to vertically pass through a substantially central portion of the module 114. The mixing chamber 116 is for causing the liquid A and the liquid B to be oppositely jetted and mixed. The module 114 is made of a material that can slide up and down with the cleaning rod 126, which will be described later, in close contact so that liquid does not leak from the gap between the mixing chamber 116 and the cleaning rod 126, which will be described later. As such a material, for example, silicon resin is preferable.

In addition, the module 114 includes injection pipes 118 and 120 that are linear in a direction crossing the module 114.
Is formed. The injection pipes 118 and 120 are provided in the mixing chamber 116.
Formed on both sides of. One end of the injection pipes 118 and 120 is
The openings are opened in the mixing chamber 116 so as to face each other. The other ends of the injection pipes 118 and 120 are connected to the module 11
Open in the peripheral wall of No. 4.

Further, substantially L-shaped supply pipes 122 and 124 extending in the vertical direction are formed on both sides of the module 114 so as to penetrate the main body 72 and the lower head 112. As shown in FIG. 4, the upper ends of the supply pipes 122 and 124 are in contact with the peripheral walls of the spindles 86 and 88, respectively.
When the spindles 86 and 88 rotate, the spindles 86 and 88 are connected to the connection pipes 90 and 92 that are opened in the peripheral walls of the spindles 86 and 88. The other ends of the supply pipes 122 and 124 are formed so as to be bent into a substantially L shape and are connected to the injection pipes 118 and 120 that are opened in the peripheral wall of the module 114. Thus
The supply pipes 122 and 124 and the injection pipes 118 and 120 form the second conduit of this embodiment. The second conduit is for injecting the liquid A and the liquid B into the mixing chamber 116, respectively.

Thus, the liquid A is introduced into the introducing pipe 100 and the connecting pipe 9.
It is injected into the mixing chamber 116 through 0, the supply pipe 122, and the injection pipe 118. Further, the liquid B will be injected into the mixing chamber 116 through the introduction pipe 102, the connection pipe 92, the supply pipe 124, and the injection pipe 120. Since the opening of the injection pipe 118 and the opening of the injection pipe 120 are provided so as to face each other inside the mixing chamber 116, the liquid A and the liquid B are agitated and agitated.

Above the mixing chamber 116, the mixing chamber 1
A cleaning rod 126 is arranged to push out and discharge the residual liquid in 16. The outer diameter of the cleaning rod 126 is formed to be slightly smaller than the inner diameter of the mixing chamber 116, and the lower end thereof is slidably arranged inside the mixing chamber 116. The upper end of the cleaning rod 126 is the lower head 1.
12 and the substantially central portion of the main body 72 are slidably inserted,
It is integrally fixed to the lower end of the rack member 80. Therefore, the cylinder 78 causes the piston rod 76, the rack member 80, and the cleaning rod 126 to integrally move in the vertical direction to open the mixing chamber 116, and then the residual liquid of the phenol foam remaining inside the mixing chamber 116 is pushed out and discharged. be able to.

At the same time, the pinion members 82 and 84 rotate as the rack member 80 reciprocates. Then, the spindles 86, 88 and the connecting pipes 90, 92 inside thereof are rotated integrally with the pinion members 82, 84, so that the connecting pipes 90, 9
The connection of 2 is switched. Thus, the spindles 86, 8
8 rotates and the connection of the connection pipes 90 and 92 is switched, so that the liquids A and B introduced from the introduction pipes 100 and 102 are jetted into the mixing chamber 116, and then to the outside of the mixing head 70. It is derived.

Below the module 114, the mixing chamber 11
A spray tip 128 having a substantially disk shape in plan view is arranged so as to cover the lower opening of the nozzle 6. FIG. 5A is a plan view showing an example of a spray tip applied to the mixing head of this embodiment. A substantially oval nozzle hole 128a is formed in a substantially central portion of the spray tip 128.
In the vicinity of the nozzle hole 128a, a substantially rhombic recess 128b is formed.
Is formed. Further, FIG. 5B is a plan view showing another example of the spray tip applied to the mixing head of this embodiment. In this spray tip 128, a substantially rectangular recess 128b is formed in the vicinity of the nozzle hole 128a formed in a substantially oval shape. By changing the shape and size of the nozzle hole 128a and its vicinity as described above, the discharge state of the phenol foam can be set to a desired state such as a mist state or a shower state.

Below the spray tip 128, a cross section L
A plane ring-shaped chip holder 130 in which two character-shaped members face each other is arranged. A circular through hole for exposing the spray tip 128 is formed in the center of the plane of the tip holder 130. On the inner peripheral surface of the tip holder 130,
A screw for screwing into the lower head 112 is cut. The tip holder 130 holds the spray tip 128 toward the module 114 while holding the lower head 112.
Is screwed into a substantially T-shaped protruding portion 112a at the lower end of the.

Next, the operating condition of this embodiment will be described. The liquid A in the first tank 12 is constantly stirred by the stirring device 16. The high-viscosity liquid A is circulated in the first circulation path 40 by the boost pump 22.

When the phenol foam is to be discharged, the cock 30 is closed and the circulation of the first circulation path 40 is stopped. Then, the metering pumps 42, 56 are used to inject the liquid A and the liquid B in opposite directions in the mixing chamber 116.
Is driven. Then, the high-viscosity liquid A pumped out from the first tank 12 by the boost pump 22 is delivered by the metering pump 42 at a high pressure by a predetermined amount. The liquid A delivered at high pressure is heated by the heater 46 and its viscosity is reduced. Then, the high-pressure liquid A with reduced viscosity is sent to the mixing head 70. On the other hand, B
The liquid is supplied to the second tank 5 by the metering pump 56.
It is pumped out from the No. 2 and sent to the mixing head 70 by a predetermined amount at a high pressure.

As shown in FIG. 2, when the phenol foam is mixed and discharged, the cylinder 78 is driven and the piston rod 76, the rack member 80, and the cleaning rod 126 are integrally formed from the lower side to the upper side of the mixing chamber 116. It is moved and the mixing chamber 116 is opened. Along with this, the linear movement of the rack member 80 causes the pinion members 82, 8 to move.
4 is converted into rotary motion, and the spindles 86, 88
Are each rotated in one direction. Then spindle 8
6. One end of the connection pipe 90 formed inside 6 is connected to the introduction pipe 100, and the other end of the connection pipe 90 is connected to the supply pipe 122. Then, the liquid A introduced from the introduction pipe 100 passes through the connection pipe 90, the supply pipe 122, and the injection pipe 118.
To be injected into the mixing chamber 116. At the same time, one end of the connection pipe 92 formed inside the spindle 88 is connected to the introduction pipe 102, and the other end of the connection pipe 92 is connected to the supply pipe 124. Then, the liquid B introduced from the introduction pipe 102 flows into the injection pipe 120 through the connection pipe 92, the supply pipe 124, and is injected into the mixing chamber 116. Thus, the liquid A and the liquid B are mixed in the mixing chamber 1
The mixture is impinged and stirred in 16 to become phenol foam. The phenol foam is mixed with the mixing chamber 11 due to the residual pressure.
From 6 through the nozzle hole 128a of the spray tip 128, for example, it is discharged in the form of mist.

As shown in FIG. 3, when the discharge of the phenol foam is completed, the cylinder 78 is driven and the piston rod 76, the rack member 80, and the cleaning rod 126 are integrally formed from the upper side to the lower side of the mixing chamber 116. Be moved towards. And the cleaning rod 1
The phenol foam remaining inside the mixing chamber 116 is pushed out by the nozzle 26 and discharged from the nozzle hole 128 a of the spray tip 128. At the same time, the linear motion of the rack member 80 is converted into rotational motion by the pinion members 82 and 84, and the spindles 86 and 88 are respectively rotated in the other directions. Then, one end of the connecting pipe 90 formed inside the spindle 86 is connected to the introducing pipe 100, and the connecting pipe 90
The other end of is connected to the outlet pipe 104. And the introduction pipe 1
The liquid A introduced from 00 is led out of the mixing head 70 through the lead-out pipe 104 through the connection pipe 90, and is returned to the first tank 12 through the second circulation path 50. At the same time, one end of the connecting pipe 92 formed inside the spindle 88 is connected to the introducing pipe 102, and the other end of the connecting pipe 92 is connected to the outlet pipe 106. And the introduction pipe 10
The liquid B introduced from No. 2 is led to the outside of the mixing head 70 via the lead-out pipe 106 via the connection pipe 92, and is returned to the second tank 52 via the third circulation path 62.

According to the mixing head 70 of this embodiment, the cleaning rod 1 is provided by one cylinder 78.
Since it is possible to drive 26 and switch the flow paths of the A liquid and the B liquid, the mixing head 70 can be simplified and downsized. Further, the switching of the flow paths of the A liquid and the B liquid is performed by the cleaning rod 126.
Since it is performed in conjunction with the reciprocating movement of (1), it is easy to match the timing of the initial flow and the final flow, and it is possible to always obtain the phenol foam mixed in a suitable mixing ratio.

The mixing head 70 of this embodiment is also used.
In the phenol foam injection device 10 to which is applied, since the viscosity can be lowered by the heater 46 provided in the path of the liquid A containing the main agent, it is possible to spray a material having a high viscosity, for example, phenol resin. The material having a relatively high viscosity and a large difference in the blending amount between the main agent and the curing agent can be subjected to collision stirring. Further, in the phenol foam injection device 10 of this embodiment, since the second circulation path 50 and the third circulation path 62 are formed,
The material remaining in the mixing head before mixing can be recovered, and the yield is improved.

Furthermore, the mixing head 7 of this embodiment
Since the metering pump 42 and the metering pump 56 of the phenol foam injection device 10 to which 0 is applied are formed of, for example, a high-pressure multi-cylinder axial pump or the like, pulsation at the time of delivery is small, and A liquid and B liquid having a predetermined flow rate are provided. The liquid and the liquid can be stably supplied at high pressure. In addition, in the phenol foam injection device 10, the heater is provided only in the path of the liquid A, but the present invention is not limited to this, and the heater may be provided in the path of the liquid B.

FIG. 6 is a schematic front view showing another embodiment of the present invention. FIG. 7 is a front view solution diagram showing an operating condition of the embodiment shown in FIG. 6. FIG. 8 is a front view solution diagram showing a state in which the lower head of the embodiment shown in FIG. 6 is removed. The mixing head 70 of this embodiment is formed to facilitate maintenance. That is, the module 114 formed of silicon resin or the like
Is abraded by the cleaning rod 126 made of metal or the like and deteriorates with time. Therefore, it is necessary to disassemble the mixing head 70 and perform maintenance for periodically replacing the module 114. In order to perform this maintenance, it is necessary to remove the lower head 112 from the main body 72. However, in the mixing head 70 shown in FIG. 1, even when the cleaning rod 126 moves to the top dead center, the lower end portion thereof is located inside the module 114 near the mixing chamber 116. Therefore, the lower head 1
When removing 12, the cleaning rod 126 must be pulled out directly below so as not to damage it. Such an operation deteriorates the workability of maintenance. Therefore, the mixing head 70 shown in FIG. 6 is formed so that the cleaning rod 126 can be pulled out above the module 114 in advance at the time of maintenance so that the lower head 112 can be easily removed and the module 114 can be replaced. That is the purpose. The structure of the mixing head 70 will be described in detail below.

The mixing head 70 shown in FIG. 6 includes a first cylinder 78 for driving the cleaning rod 126 and switching the flow paths of the A liquid and the B liquid. A second cylinder 160 as a displacement means for displacing the top dead center of the first cylinder 78 and adjusting the stroke is continuously provided on the upper end side of the first cylinder 78.
The first cylinder 78 includes a piston 140 therein, as in the embodiment shown in FIG. A piston rod 76 is fixed to the center of the piston 140 so as to be inserted in the thickness direction of the piston 140. The upper end portion of the piston rod 76 of this embodiment is provided so as to protrude upward in the thickness direction of the piston 140. Further, as in the embodiment shown in FIG. 1, the substantially central portion of the main body 72 of the miking head 10 is inserted into the lower end portion of the piston rod 76 so as to be slidable in the vertical direction, and the rack member 80.
And the cleaning rod 126 is provided linearly in the vertical direction.

Further, the lower end side of the first cylinder 78 is
It is sealed by a flat annular rod cover 144. A ring-shaped packing 146 is provided on the outer periphery of the rod cover 144.
And a ring-shaped packing 148 is provided on the inner circumference of the rod cover 144. Then, the rod cover 144 and the inner wall of the first cylinder 78 form a packing 146.
And the rod cover 144 and the piston rod 76 are slidably sealed by a packing 148. Further, inside the first cylinder 78, a first cylinder chamber 150 is formed between the piston 140 and the rod cover 144, and a second cylinder chamber 150 is formed between the piston 140 and a second piston 162 described later. A cylinder chamber 152 is formed. In addition, a first through hole 154, which serves as a fluid passage for moving the piston rod 76 in the upward direction, that is, in the direction opposite to the mixing chamber 116, is formed penetrating the side wall of the first cylinder chamber 150. Furthermore, the piston rod 7
The second through hole 156, which serves as a fluid passage for moving 6 from the inside of the first cylinder 78 toward the mixing chamber 116.
Are formed so as to penetrate the side wall of the second cylinder chamber 152. First through hole 154 and second through hole 156
Are each connected to a hydraulic pump (not shown) as a pressure source.

Next, the second cylinder 160 of the mixing head 70 shown in FIG. 6 will be described. The second cylinder 160 is continuously provided on the upper end side of the first cylinder 78. The second cylinder 160 includes a second piston 162 for determining the top dead center of the piston rod 76. At the top dead center, the upper end portion of the piston rod 76 is brought into contact with one surface of the second piston 162. Second piston 1
A piston ring 164 is provided on the outer circumference of 62.
In addition, a third cylinder chamber 166 is formed on the other surface side of the second piston 162. Further, a third through hole 168 which serves as a fluid passage for vertically moving the second piston 162 is formed so as to penetrate the upper wall of the third cylinder chamber 166. The third through hole 168 is connected to a hydraulic pump (not shown) as a pressure source.

Next, the operating condition of the mixing head 70 shown in FIG. 6 will be described with reference to FIGS. 6, 7 and 8. During the mixed discharge of phenol foam, hydraulic pressure is applied to the third cylinder chamber 166 from the third through hole 168, and the second piston 162 is moved downward. Then, hydraulic pressure is applied to the first cylinder chamber 150 from the first through hole 154, and the piston 140 is
Move up. Therefore, as shown in FIG. 6, the upper end of the piston rod 76 contacts the lower surface of the second piston 162, and the mixing chamber 116 is opened. And FIG.
The discharge operation of phenol foam can be performed in the same manner as the mixing head shown in. Further, when the discharge of the phenol foam is completed, hydraulic pressure is applied to the second cylinder chamber 152 from the second through hole 156, and the piston 1
40 moves downward. Then, as in the mixing head shown in FIG. 2, the residual liquid of the phenol foam is discharged, and at the same time, the flow paths of the liquids A and B are switched, and the liquids A and B before mixing are circulated.

At the time of maintenance for replacing the module 114, as shown in FIG. 7, the inside of the third cylinder chamber 166 is decompressed from the third through hole 168, and the second piston 162 is moved upward. Then, the first through hole 1
By applying hydraulic pressure from 54 to the first cylinder chamber 150, the first piston 140 is moved to the second piston 162.
Move until it abuts the lower surface of. By doing this,
The lower end portion of the cleaning rod 126 is pulled out upward from the inside of the module 114 as shown in FIG. 7. Therefore, as shown in FIG.
Can be easily removed, and the workability of maintenance such as replacement of the module 114 is improved. As described above, according to the embodiment shown in FIG. 6, it is possible to obtain the mixing head which is easy to maintain, and moreover, it is possible to obtain the same effect as that of the embodiment shown in FIG.

The cylinder of the above-described embodiment is not limited to the hydraulic cylinder, but a pneumatic cylinder may be used. Further, in the embodiment shown in FIG. 6, instead of forming the second cylinder 160 as the displacement means, a screw-type stopper may be formed. That is, for example, a substantially cylindrical stopper is screwed in from the upper end of the first cylinder 78, and the top dead center of the piston rod 76 is restricted by the lower end of the stopper. Then, the top dead center of the cleaning rod 126 may be adjusted by adjusting the screwing amount of the stopper into the first cylinder 78.
Even in that case, the same effect as that of the embodiment shown in FIG. 6 can be obtained.

[Brief description of drawings]

FIG. 1 is an illustrative view showing an example of an apparatus to which an embodiment of the present invention is applied.

FIG. 2 is a front view solution diagram showing an embodiment of the present invention.

FIG. 3 is a front view solution view showing an operation of the embodiment shown in FIG.

FIG. 4 is an illustrative view showing a main part of the embodiment shown in FIG.

5 (A) is a front view showing an example of the spray tip of the embodiment shown in FIG. 2, and FIG. 5 (B) is a front view showing another example.

FIG. 6 is a front view solution view showing another embodiment of the present invention.

FIG. 7 is a front view solution view showing an operation state of the embodiment shown in FIG.

8 is a front view solution view showing a state in which a lower head of the mixing head shown in FIG. 7 is removed.

[Explanation of symbols]

10 Phenolic Foam Injector 12 First Tank 16 Stirrer 22 Boost Pump 24, 26, 28, 32, 34, 38, 44, 48, 5
4, 58, 60 conduit 40 first circulation path 42 metering pump 46 heater 50 second circulation path 52 second tank 56 metering pump 62 third circulation path 70 mixing head 72 main body 76 piston rod 78 cylinder 80 Rack member 82, 84 Pinion member 86, 88 Spindle 90, 92 Connecting pipe 100, 102 Introducing pipe 104, 106 Outlet pipe 112 Lower head 114 Module 116 Mixing chamber 118, 120 Injection pipe 122, 124 Supply pipe 126 Cleaning rod 128 Spray tip 130 Tip Holder 140 Piston 142 Piston Ring 144 Rod Cover 146, 148 Packing 150 First Cylinder Chamber 152 Second Cylinder Chamber 154 First Through Hole 156 Second Through Hole 160 Second Linda 162 second piston 164 piston rings 166 third cylinder chamber 168 third through hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuhei Ochi 1-4 Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture National Housing Industry Co., Ltd. (72) Inventor Yuji Nakagawa Shinsenri Toyonaka, Osaka Prefecture 1-4-1 Nishimachi National Housing Industry Co., Ltd. (72) Inventor Tadashi Yamada 1-4-1 Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture National Housing Industry Co., Ltd. (72) Inventor Kazuhiko Matsumoto Osaka 1-4-1, Shinsenri-Nishimachi, Toyonaka-shi, Fuchu National Housing Industry Co., Ltd.

Claims (3)

[Claims] 1. A mixing chamber for mixing a plurality of materials, a cleaning rod for reciprocating in the mixing chamber in a longitudinal direction thereof for cleaning the mixing chamber, and a reciprocating movement of the cleaning rod. Cylinder, a first conduit for introducing a material to be mixed from the outside, a second conduit for injecting the material introduced through the first conduit into the mixing chamber, an introduction through the first conduit Third conduit for discharging the discharged material to the outside, a fourth conduit for connecting the first conduit with one of the second conduit and the third conduit, and the cleaning rod Interlocking with the reciprocating movement of the
A switching means for switching the conduit connection of
Mixing head. 2. The switching means includes a rack member connected to the cleaning rod, and a pinion member that is provided so as to interlock with the rack member and that rotates the fourth conduit to switch the connection. The mixing head according to claim 1. 3. A displacement means for displacing the top dead center of the piston of the cylinder, according to claim 1 or 2.
The mixing head described in.