WO2014077452A1 - Mixing head having enhanced mixing performance and discharging device thereof - Google Patents

Abstract

The purpose of the present invention is to provide a mixing head which mixes a plurality of flowing raw materials so as to discharge the same and has enhanced mixing performance so as to more effectively mix the plurality of flowing raw materials, and a discharge device for the same. The mixing head for mixing a plurality of raw materials which are separately supplied so as to discharge the same, according to the present invention, comprises: a mixing member for carrying out a first mixing of the raw materials; a discharge member communicating with the mixing chamber of the mixing member such that the raw materials are introduced into a discharge movement path; a rotation member having a penetrated movement path which functions as a part of the discharge movement path, and which rotates in the state that the central axial line of the penetrated movement path is relative to the central axial line of the discharge movement path such that the rotation member can be inclined at a predetermined angle so as to form a joining section in the discharge movement path; and a driver for driving the rotation member so as to rotate the rotation member.

Description

Mixing head and its discharging device with improved mixing performance

The present invention relates to a mixing head and its discharging device with improved mixing performance. In more detail, a rotating body in charge of a part of the flow path is provided in the flow path of the mixing head for discharging the raw materials to be mixed, and a convection section generated by the rotation of the rotating body obliquely achieves good mixing of the materials. It relates to a mixing head and a discharge device thereof.

The mixing head is a device that sprays two or more kinds of raw materials through a high pressure nozzle and mixes them by collision. This is widely used in the production of polyurethane foam products, and polyol and polyisocyanate are injected by high pressure injection, and then the mixed material is injected into the mold.

Since the raw materials to be mixed inside the mixing head need to form a good mixed state in a short section until discharged, a separate vortex chamber is formed in addition to the mixing chamber in which two or more raw materials are mixed at high pressure and mixed, and an additional device is separately provided. There have been many attempts to improve the mixing efficiency.

FIG. 1 shows a configuration of a conventional mixing head 1 for manufacturing a polyurethane foam as described in Korean Patent No. 10-0368178.

Referring to FIG. 1, the mixing head 1 has the cleaning piston 6 retracted, the mixing chamber piston 3 retracted, and the polyol and isocyanate at high pressure (approximately 150 bar) in each injection nozzle 4 respectively. It is injected into the mixing chamber 5.

The high pressure sprayed polyols and isocyanates strongly collide with each other and with the walls in the mixing chamber 5, causing vortices and turbulences, and mixing.

As shown in FIG. 2, the primary mixed raw material passes through the convection section 8 formed between the end 6a of the cleaning piston 6 and the wall end of the mixing chamber 5, and again vortex and turbulence flow. Formed and mixing takes place. The mixture thus mixed is injected into the mold through the discharge flow path 7 of the discharge tube 2. When the required amount is injected into the mold, the mixing chamber piston 3 moves forward and the cleaning piston 6 moves forward to cleanly inject the residue inside the mixing head 1 into the mold.

However, the structure of the conventional mixing head 1 as described above does not have sufficient and satisfactory mixing between the raw materials, and the mixing performance of homogeneously mixing the raw materials is the most important factor in determining the quality of the foamed product. It can be called an element.

The present invention has been made in view of the above. SUMMARY OF THE INVENTION An object of the present invention is to provide a mixing head having an improved mixing performance and a discharging device thereof, in which a mixing head for mixing and discharging a plurality of flowing raw materials is discharged more effectively and better.

Accordingly, the present invention provides a mixing chamber, a supply port and a return port respectively formed in the mixing chamber for each of the raw materials for supplying a plurality of raw materials to the mixing chamber, and a return groove having a predetermined length on the side along the longitudinal direction. Is formed and is slid in the mixing chamber, the position where the plurality of raw materials are supplied from the supply port into the mixing chamber, and the return groove connects the supply port and the return port and is supplied from the supply port. A mixing member made of a mixing chamber piston which is slid between positions at which raw material flows to the return port; And a discharge flow path communicating with and intersecting with the mixing chamber and flowing to discharge the raw material, a retraction operation for allowing the raw material to flow into the discharge flow path from the mixing chamber, and the raw material remaining in the discharge flow path. In the mixing head for mixing and discharging a plurality of raw materials supplied independently by a; discharge member including a cleaning piston made by sliding forward in the discharge flow path for advancing forward to push to the discharge port And a through flow path that is responsible for a portion of the mixing chamber or the discharge flow path, and the through flow path rotates to form a convection section through which the plurality of raw materials pass in the mixing chamber or the discharge flow path. A rotor that can be inclined at an angle of; and a driver for rotating the rotor It characterized in that it comprises.

On the other hand, in another aspect, the present invention provides a mixing head for mixing and discharging a plurality of raw materials to be supplied independently, the mixing chamber and a supply formed for each of the raw materials to supply a plurality of raw materials to the mixing chamber. A mixing member including a port; A discharge flow path which communicates with the mixing chamber and flows to discharge the raw material, and a retraction operation for allowing the raw material to flow into the discharge flow path from the mixing chamber, and pushes the raw material remaining in the discharge flow path to the discharge port; A discharge member including a cleaning piston, wherein a forwarding operation of advancing for exiting is performed by sliding in the discharge flow path; A rotating body having a through flow path configured to cover a portion of the discharge flow path, the through flow path being rotated to be inclined at a predetermined angle so as to form a convection section in the discharge flow path; And, characterized in that it comprises a driver for rotating the rotating body.

In another aspect, the present invention provides a discharge flow path including a discharge flow path that flows to discharge a plurality of raw materials mixed in the mixing head, and a cleaning piston that moves forward and backward by sliding in the discharge flow path. In the apparatus, a discharge flow path for flowing the raw material is discharged, and a through flow path for a part of the discharge flow path is formed, the through flow path is rotated so that a narrowing section is formed in the discharge flow path It characterized in that it comprises a rotating body which can be inclined at a predetermined angle, and a drive for rotating the rotating body.

The mixing head according to the present invention has the following effects.

First, the present invention is configured such that a through flow path for a part of a mixing chamber or a discharge flow path is inclined at a predetermined angle by rotation of a rotating body in which the through flow path is installed. It is possible to form a convection section above and below. Therefore, a plurality of raw materials mixed with each other can pass through a plurality of convection sections to achieve an excellent mixed state.

Second, the present invention can be adjusted according to the characteristics of the raw material because it can adjust the width of the narrowing section formed in the through-flow path according to the inclination angle of the rotating body installed in the discharge member. That is, in the case of a raw material which should form a very homogeneous mixed state, or a raw material which is not excellent in mixing characteristics, the rotational body is inclined relatively more and the width of the narrowing section is narrowed to increase the generation of vortices and turbulence. On the contrary, in the case of a raw material having a relatively good mixing property, the rotor is rotated relatively small to widen the narrowing section. If the convection section is large, the flow can be made well at low pressure.

Third, in the present invention, although the rotating body is installed in the discharge flow path in which the cleaning piston moves, the inclined driving state of the rotating body for mixing the raw materials and the discharge flow path and the through flow path of the rotating body for cleaning are matched. Operation between return drive states is implemented by a very simple configuration. This does not unnecessarily increase the overall size of the discharge flow path.

1 is a cross-sectional view showing the configuration of a conventional mixing head.

FIG. 2 is an explanatory diagram of mixing action of raw materials supplied according to the mixing head of FIG.

Figure 3 is a cross-sectional view of the mixing head according to an embodiment of the present invention

4 is a perspective view showing the configuration of a rotating body according to an embodiment of the present invention;

5 is a perspective view showing another configuration of a rotating body according to an embodiment of the present invention.

6 is an explanatory diagram illustrating the operation of the mixing head according to the embodiment of the present invention.

7 is an explanatory diagram illustrating a mixing action of raw materials in a mixing head according to an embodiment of the present invention.

8 is an explanatory view of the operation of the cleaning piston in the mixing head according to an embodiment of the present invention

9 is a cross-sectional view showing a configuration in which two mixing members are installed in the discharge member according to another embodiment of the present invention.

10 is a cross-sectional view of a mixing head according to another embodiment of the present invention

11 is an explanatory diagram illustrating an operation of a mixing head according to another embodiment of the present invention.

12 is a cross-sectional view showing a configuration in which a rotating body is installed in a mixing chamber according to another embodiment of the present invention.

13 is a cross-sectional view for explaining a modified configuration of a rotating body according to an embodiment of the present invention.

An embodiment of the present invention will be described in more detail with reference to the drawings.

Figure 3 is a mixing head according to an embodiment of the present invention is for mixing and discharging a plurality of raw materials supplied independently, in particular, the high pressure spraying of polyol and isocyanate for foaming of polyurethane, the mixing efficiency It can be effectively used in the field of raising the weight.

The raw material to be supplied and mixed in the present invention means a liquid raw material, and includes a raw material having fluidity such as a liquid such as gel.

The mixing head for mixing and discharging a plurality of raw materials independently supplied in accordance with the present invention is the mixing chamber 12 and the mixing chamber 12 for supplying the plurality of raw materials to each of the raw materials, respectively. The supply port 13 and the return port 14 formed in the mixing chamber 12, and the return groove 17 of a predetermined length is formed on the side along the longitudinal direction, and slides in the mixing chamber 12. A position where the plurality of raw materials are supplied into the mixing chamber 12 from the supply port 13, and the return groove 17 connects the supply port 13 and the return port 14 to the supply port A mixing member (10) comprising a mixing chamber piston (16) which is slid between positions in which the raw material supplied from (13) flows to the return port (14); A discharge flow passage 22 communicating with and intersecting with the mixing chamber 12 and flowing to discharge the raw material, and a retraction operation for allowing the raw material to flow into the discharge flow passage 22 from the mixing chamber 12. And a cleaning piston 24 in which a forward operation for advancing the raw material remaining in the discharge flow path 22 to push the discharge port is performed by sliding in the discharge flow path 22. )Wow; A through flow path 33 is formed to cover a part of the middle of the discharge flow path 22 and rotates from a state where the center axis of the through flow path 33 coincides with the center axis of the discharge flow path 22. Rotor 30 that can be inclined at a predetermined angle; And, the driver 40 for rotating the rotation body 30.

The mixing member 10 is a portion in which a plurality of raw materials are independently supplied to perform primary mixing. The mixing member 10 includes a mixing chamber 12, a supply port 13, a return port 14, and a mixing chamber piston 16.

The mixing member 10 is a space in which raw materials introduced independently are mixed, and a cylinder shape is most preferable.

The supply port 13 sprays a plurality of flowing raw materials into the mixing chamber 12 by high pressure, and is installed in front of the return port 14 based on the direction in which the mixing chamber piston 16 moves forward. , For each raw material.

The return port 14 is provided to communicate with the mixing chamber 12 behind the supply port 13, and is installed at the rear side so as to correspond to the supply port 13 for one raw material. The return port 14 is one raw material supplied from the supply port 13 flows into the return groove 17 of the mixing chamber piston 16 and returns to the storage tank.

The mixing chamber piston 16 receives the operating force by a separate pneumatic cylinder and slides in the mixing chamber 12 to move forward and backward. The mixing chamber piston 16 has a position where a plurality of raw materials are supplied into the mixing chamber 12, and the return groove 17 connects the supply port 13 and the return port 14 to the supply port ( The raw material supplied in 13 is slid between positions flowing to the return port 14. That is, when advancing the mixing chamber piston 16, the raw material pneumatically injected from the supply port 13 flows into the return port 14 through the return groove 17 of the mixing chamber piston 16, and the mixing chamber piston ( In the reverse direction of the 16, the supply port 13 is opened with respect to the mixing chamber 12 so that each raw material supplied through each supply port 13 can be sprayed in the mixing chamber 12 at a high pressure.

A return groove 17 having a predetermined length is formed on the side surface in the longitudinal direction of the mixing chamber piston 16. The return grooves 17 are provided for each raw material, one for each corresponding pair of the supply port 13 and the return port 14.

Meanwhile, the discharge member 20 includes a discharge flow passage 22 communicating with the mixing chamber 12 and a cleaning piston 24 sliding in the discharge flow passage 22.

The discharge flow passage 22 is a space in which the first mixed raw material is supplied and flows from the mixing chamber 12 and communicates with the mixing chamber 12. The mixing chamber 12 and the discharge flow passage 22 preferably cross vertically, but may cross at different crossing angles.

The discharge flow passage 22 is most preferably cylindrical.

In the cleaning piston 24, after the mixed raw material is finally discharged through the discharge flow path 22 to the discharge port 26, the cleaning piston 24 pushes the raw material remaining in the discharge flow path 22 to the discharge port 26. To slide forward and backward.

The mixing chamber 12 and the discharge flow path 22 communicate with each other so that the first mixed raw material from the mixing chamber 12 flows into the discharge flow path 22 by the retraction operation of the cleaning piston 24. In addition, when the ejector cylinder is advanced, the raw material remaining in the discharge flow path 22 may be pushed to the tip of the ejector cylinder and discharged through the discharge port 26.

On the other hand, the rotating body 30 is provided in the discharge flow path 22 to form a multi-stage convection section in the discharge flow path 22 to form a more evenly mixed raw material mixed state.

The rotating body 30 is formed with a through flow path 33 which is responsible for a part of the discharge flow path 22 and the central axis of the through flow path 33 coincides with the central axis of the discharge flow path 22. It may be inclined at a predetermined angle so as to form a convection section in the discharge flow path 22 by rotating from the above state. By such inclination, a narrowing section (A) is formed at the point where the through flow passage (33) and the discharge flow path (22) meet, and the narrowing section (A) changes the direction of motion of the raw materials passing therethrough. Mixing between can be facilitated.

In order to facilitate the manufacture and installation of the rotating body 30, the central axis of the through-flow flow path 33 of the rotating body 30 is configured to be in a state that does not coincide with the central axis of the discharge flow path 22. It may be. In this case, the diameter of the through flow passage 33 is made larger than the diameter of the discharge flow passage 22, and when the cleaning piston 24 enters the through flow passage 33, it is caught by the edge of the rotating body 30 and obstructed. As shown in FIG. 13, the rotating body 30 is disposed so as not to be received.

4 illustrates a specific configuration of the rotating body 30.

Referring to FIG. 4, the rotating body 30 is formed in a short circumferential shape and the rotating shaft 31 is perpendicular to the center axis of the discharge flow path 22 and the center axis of the through flow path 33. Is formed. The rotating shaft 31 forms a central axis in the longitudinal direction of the columnar shape.

The through flow path 33 is formed at right angles to the cylindrical central axis, and the through flow path 33 forms part of the discharge flow path 22. Configuring to form part of the discharge flow path 22 means that the discharge flow path 22 extends continuously after the broken portions of the discharge flow path 22. The through flow path 33 is a space penetrated in a cylindrical shape.

In the discharge member 20, a cylindrical space having the same diameter as the cylindrical shape is formed in order to embed the cylindrical rotating body 30, and the rotating body 30 is inserted so that the rotating body as shown in FIG. 30 is provided in the discharge member 20.

5 shows a modified configuration of the rotating body 30.

The rotating shaft 31 has a spherical shape passing through the center, and a through flow path 33 is formed in a direction perpendicular to the rotating shaft 31.

Also in the case of the spherical rotary body 30 ', a spherical space having the same diameter as the spherical shape is formed in the discharge member 20 so as to embed the spherical rotary body 30'. By inserting 30 ', the rotating body 30' is provided in the discharge member 20 as shown in the cross section shown in FIG.

The cylindrical or spherical rotary body 30 is not necessarily limited to the shape thereof, and is configured to form a convection section in the discharge flow path 22 by rotating as shown in FIG. 3. The whole 30 has a rotating shaft 31 formed in a direction perpendicular to the central axis of the discharge flow passage 22, a cross section perpendicular to the rotating shaft 31 forms a circular shape, the discharge member 20 has a rotating shaft 31 The cross section perpendicular to the cross-sectional shape is formed in a circle coinciding with the cross section of the rotating body 30 so that the rotating body installation space is formed so that the rotating body 30 can be embedded and rotated. The cylindrical space and the spherical space are the rotor installation space.

As shown in FIGS. 4 and 5, the driver 40 is for rotating the rotating body 30, and includes a servo motor that can adjust the amount of rotation, and a speed reducer for reducing the rotation of the servo motor. Power transmission means such as gears 41 and 42 for transmitting rotational force to the rotating body 30 are provided.

The driving amount of the driver 40 is controlled by the controller.

The following describes the operation of the mixing head according to an embodiment of the present invention.

First, referring to FIG. 6, the cleaning piston 24 is devoted to a position where the mixing chamber 12 and the discharge flow passage 22 communicate with each other. At the position, the end 24a of the cleaning piston 24 forms a narrowing section A in which the mixing chamber 12 and the discharge flow passage 22 are connected by a narrow gap. This causes the raw materials flowing in the convection section (A) to cause a complicated flow by the sudden change in the direction of movement and to cause mixing. With the adjustment of the cleaning piston 24, the rotating body 30 is also rotated at an inclination angle set by the driver 40, and the discharge flow path 22 and the upper and lower ends of the through flow path 33 of the rotating body 30 are rotated. The communication section (B, C) is formed.

After the cleaning piston 24 and the rotating body 30 are adjusted, the mixing chamber piston 16 opens the supply port 13 to independently feed a plurality of raw materials into the mixing chamber 12 through each supply port 13. High pressure injection. A plurality of raw materials sprayed with high pressure into the mixing chamber 12 are sprayed with high pressure in different directions and collide with each other to generate vortices and turbulent flows, thereby primarily mixing.

As the first mixed raw material passes through the convection section A between the mixing chamber 12 and the discharge flow path 22, additional mixing may occur as the direction of movement changes.

Thereafter, the raw material flowing through the through flow path 33 flows into the through flow path 33 of the rotating body 30. At this time, the through flow passage 33 communicates with the discharge flow passage 22 in a bent state, and a convection section B is formed between the upper end of the through flow passage 33 and the discharge flow passage 22. Therefore, the raw materials entering the through flow path 33 has a sudden change in the direction of movement occurs in the convection section (B), the mixing action occurs.

In addition, the raw materials passing through the through flow path 33 are again passed through the intersect section (C) that meets the discharge flow path 22 at the bottom of the through flow path 33, the additional mixing action in the convection section (C) This happens.

FIG. 7 illustrates the action in which such mixing occurs. The pressure is changed by the flow between the raw materials flowing in the upper and lower portions of the through flow passage 33 in the course of passing through the convection sections B and C. It is shown that a difference occurs and mixing is caused by turbulence and vortex due to this.

Therefore, the convection section in which the mixing of the raw materials passing through the discharge flow passage 22 occurs while the rotating body 30 is inclined at the set angle is formed at the upper end and the lower end of the through flow passage 33 so that the multi-stage convection section is formed. Through (B, C) it is possible to create a homogeneous mixed state.

The raw materials mixed in a homogeneous state are discharged through the discharge port 26. If polyol and isocyanate are high pressure sprayed in the mixing chamber 12, they are mixed in a homogeneous state for polyurethane foaming, and then in the corresponding positions of the object for forming polyurethane foams such as automobiles and electronics. Discharged.

8 illustrates a state in which the mixed raw material remaining in the discharge flow path 22 is discharged to the discharge port 26 by the cleaning piston 24 at the time point at which mixing and discharging are completed.

Referring to FIG. 8, after the raw materials for mixing are stopped through the supply port 13, the mixing chamber piston 16 is advanced to transfer the raw materials remaining in the mixing chamber 12 to the through flow path 33. Push out. In this state, the return groove 17 formed on the side of the mixing chamber piston 16 connects the supply port 13 and the return port 14 so that the raw material continuously supplied at high pressure through the supply port 13 is returned to the return port 17. Return to the reservoir via 14.

Subsequently, the controller for controlling the driver 40 controls the rotating body 30 to rotate before the cleaning piston 24 advances, so that the central axis of the through flow path 33 of the rotating body 30 is the discharge flow path. Make sure that it coincides with the center axis of (22). This forms a passage so that the through flow passage 33 coincides with the direction of the discharge flow passage 22 so that the cleaning piston 24 can pass therethrough.

When the rotation of the rotor 30 is completed, the cleaning piston 24 is advanced and the mixed raw materials remaining in the discharge flow passage 22 and the through flow passage 33 are pushed out and discharged through the discharge hole 26.

After discharging the remaining raw materials through the discharge port 26, the cleaning piston 24 is retracted to be in a standby state until the following work is started, and when the following work is started, the aforementioned work is resumed as shown in FIG. .

The operations of the mixing chamber piston 16 and the cleaning piston 24 described above are also controlled by a controller that controls the driver 40.

9 illustrates a configuration of another embodiment in which two independent mixing members 10 are connected to one discharge member 20. In such a configuration, different kinds of mixtures may be discharged from one discharge member 20. That is, in order to discharge the different mixtures alternately according to the needs of the work, the mixing members 10 for producing each mixture may be connected to each other, and the mixing members 10 may be operated one by one.

In this case, when the work is performed by supplying raw materials having poor mixing properties according to the characteristics of the raw materials from one mixing member 10, the rotating body 30 is rotated at a large inclination angle to form the narrowing sections B and C. To form narrow. Accordingly, while vortices and turbulence are generated largely while passing through a narrow narrow convection section, mixing may be induced to occur more uniformly, while a large flow resistance is generated, and thus the raw material needs to be injected at a relatively high pressure.

When the work is performed by supplying a raw material having a characteristic of easily mixing from another mixing member 10, the rotating body 30 is rotated at a small inclination angle to form a narrow convection section (B, C). Accordingly, even though the vortex and the turbulence do not occur significantly while passing through the narrowing section, the mixing can occur satisfactorily. In addition, since the flow resistance is small, the raw material may be injected at a relatively low pressure.

10 shows a mixing head of yet another embodiment of the present invention.

Referring to FIG. 10, in the present embodiment, the discharge member 20 of the above-described embodiment also serves as the mixing member 10.

The mixing member 100 includes a mixing chamber 120 and a supply port 130. The mixing chamber 120 constitutes an upper portion of the discharge flow path 220, and the cleaning piston 240 includes a mixing chamber ( It passes through 120 and is advanced to the discharge flow path 220.

The supply port 130 is provided on the side of the mixing chamber 120 so that a plurality of raw materials are independently sprayed in the mixing chamber 120.

The discharge member 200 includes a discharge flow path 220 and a cleaning piston 240, and the discharge flow path 220 is installed below the mixing chamber 120 to mix the mixing chamber 120 and the discharge flow path 220. Is combined into one passage.

The cleaning piston 240 may mix a plurality of raw materials supplied in the mixing chamber 120 by the retracting operation that is slid and proceed to the discharge flow path 220, and may remain in the discharge flow path 220 by the forward operation. Raw materials may be pushed out to the discharge port 260.

As in the case of the above-described embodiment, the rotating body 300 is installed in the discharge member 200 to cover a part of the discharge flow path 220. By rotating the rotor 300 at a set angle by the driver 400, a narrow section may be formed in the discharge flow path 220.

FIG. 11 illustrates an operating state of the mixing head of FIG. 10.

First, when the cleaning piston 240 retreats and supplies a plurality of raw materials into the mixing chamber 120 through each supply port 130, a plurality of raw materials collide in the mixing chamber 120 to generate the first mixing. .

The first mixed raw materials pass through the upper and lower convection sections of the through flow path 330 generated by the rotating body 300 in the process of flowing through the discharge flow path 220. The action in the convection section is the same as described above.

At the time when the work is stopped, the controller for controlling the driver 40 controls the rotating body 300 to rotate before the cleaning piston 240 moves forward, so that the center of the through flow path 330 of the rotating body 300 is rotated. The axis is aligned with the central axis of the discharge flow path 220. The through flow path 330 coincides with the direction of the discharge flow path 220 to form a passage through which the cleaning piston 240 can pass.

When the rotation of the rotor 300 is completed, the cleaning piston 240 is advanced to discharge the mixed raw material remaining in the discharge flow path 220 and the through flow path 330 through the discharge port 260.

In this embodiment, the mixing member 100 is coupled to the discharge member 200 to implement the device in a simple configuration.

Meanwhile, FIG. 12 illustrates a configuration in which the rotating body 3000 according to the present invention is provided in the mixing chamber 12.

Even in the configuration in which the rotating body 3000 is provided in the mixing chamber 12, raw materials flowing in the mixing chamber pass through the narrowing section made by the rotation of the rotating body 3000, and thus the rotating body in the discharge flow path 22. As in the case where 30 is installed, the generation of vortex and turbulence can be induced and mixed evenly.

When the mixing chamber piston 16 is advanced for cleaning, the rotating body 3000 is returned to its original position by the controller so that the mixing chamber piston 16 can pass through the through flow path 3300 of the rotating body 3000. To help. In the state where the rotor 3000 is returned to its original position, the center axis of the through flow path 3300 coincides with the center axis of the mixing chamber 12, whereby the inner circumferential surface of the through flow path 3300 and the mixing chamber 12 become It is most desirable to form a cylindrical passageway in perfect agreement with no bending. However, unless the mixing chamber piston 16 is prevented from entering the through flow path 3300, the center axis of the through flow path 3300 does not necessarily have to coincide with the center axis of the mixing chamber 12.

The mixing head of the present invention can be used for mixing and discharging a plurality of raw materials.

In particular, the present invention is applicable to the production of polyurethane foam products in which polyol and isocyanate are mixed by high pressure spraying, and then the mixed material is injected into a mold.

Claims (10)

The mixing chamber 12, A supply port 13 and a return port 14 formed in the mixing chamber 12 for each of the raw materials for supplying a plurality of raw materials to the mixing chamber 12; A return groove 17 having a predetermined length is formed along the longitudinal direction and is slid in the mixing chamber 12 so that the plurality of raw materials are supplied into the mixing chamber 12 from the supply port 13. Between the position and the position where the return groove 17 connects the supply port 13 and the return port 14 so that the raw material supplied from the supply port 13 flows to the return port 14. A mixing member 10 made of a mixing chamber piston 16; And, A discharge flow passage 22 communicating with and intersecting with the mixing chamber 12 and flowing to discharge the raw material; A retraction operation for introducing the raw material from the mixing chamber 12 into the discharge flow path 22 and a forward operation for advancing the raw material remaining in the discharge flow path 22 to the discharge port 26 are performed. In the mixing head for mixing and discharging a plurality of raw materials to be supplied independently by having a discharge member (20) comprising a cleaning piston (24) made by sliding in the discharge flow path (22), A through flow path 33 which is responsible for a part of the mixing chamber 12 or the discharge flow path 22, and the plurality of raw materials passes through the mixing chamber 12 or the discharge flow path 22; Rotating body 30 that can be inclined at a predetermined angle by rotating the through-flow flow path 33 so that the convection section (B, C) is formed; And Mixing head with improved mixing performance, characterized in that it further comprises a driver 40 for rotating the rotor 30 The method of claim 1, The mixing chamber 12 and the discharge flow path 22 vertically intersect, By the rotation of the through flow path 33, the center axis of the through flow path 33 may coincide with the center axis of the mixing chamber 12 or the discharge flow path 22, The rotating body 30 A rotating shaft 31 is formed in a direction perpendicular to the central axis of the through flow path 33, Mixing head with improved mixing performance, characterized in that the rotating shaft 31 is a spherical shape passing through the center or the longitudinal central axis is a circumferential shape of the rotating shaft 31 In the mixing head for mixing and discharging a plurality of raw materials supplied independently, A mixing member (10) comprising a mixing chamber (12) and a supply port (13) formed for each of the raw materials for supplying a plurality of raw materials to the mixing chamber (12); A discharge flow path 22 which is in communication with the mixing chamber 12 and flows to discharge the raw material, and a retraction operation for allowing the raw material to flow into the discharge flow path 22 from the mixing chamber 12 and the A discharge member including a cleaning piston 24 in which a forward operation for advancing the raw material remaining in the discharge flow path 22 to push the discharge port 26 is performed by sliding in the discharge flow path 22 ( 20); A through flow path 33 is formed to cover a part of the discharge flow path 22, and the through flow path 33 rotates so that a narrowing section (B, C) is formed in the discharge flow path (22). Rotor 30 that can be inclined at a predetermined angle; And, Mixing head with improved mixing performance, characterized in that it comprises a driver 40 for rotating the rotor 30 The method of claim 3, The rotating body 30 A rotating shaft 31 is formed in a direction perpendicular to the central axis of the discharge flow passage 22, Mixing head with improved mixing performance, characterized in that the rotating shaft 31 is a spherical shape passing through the center or the longitudinal central axis is a circumferential shape of the rotating shaft 31 The method of claim 4, wherein A controller for controlling the driver 40 is installed, The controller controls the cleaning piston 24 before the advance operation. Mixing head with improved mixing performance, characterized in that by rotating the rotating body 30 to match the central axis of the through flow path 33 with the central axis of the discharge flow path 22 The method according to any one of claims 1 to 5, Mixing head with improved mixing performance, characterized in that the mixing chamber 12, the discharge flow path 22 and the through flow path 33 are all cylindrical spaces The method according to any one of claims 1 to 5, The mixing member 10 is a mixing head with improved mixing performance, characterized in that a plurality is installed independently of each other A discharge flow passage 22 which flows to discharge a plurality of raw materials mixed in the mixing head, In the discharge device of the mixing head comprising a cleaning piston (24) which moves forward and backward by sliding in the discharge flow path (22), A discharge flow path 22 flowing to discharge the raw material, A through flow path 33 is formed to cover a part of the discharge flow path 22, and the through flow path 33 rotates to form a convection section B and C in the discharge flow path 22. And the rotating body 30 which can be inclined at a predetermined angle, Discharge device of the mixing head with improved mixing performance, characterized in that it comprises a driver 40 for rotating the rotating body 30 The method of claim 8, The rotating body 30 A rotating shaft 31 is formed in a direction perpendicular to the central axis of the discharge flow passage 22, The cross section perpendicular to the rotation axis 31 forms a circle, In the discharge member 20 Mixing with improved mixing performance, characterized in that the cross section perpendicular to the rotating shaft 31 forms a circular shape coinciding with the cross section of the rotating body 30 so that the rotating body installation space is formed in which the rotating body 30 is embedded. Head ejection device The method according to claim 8 or 9, The mixing chamber 12, the discharge flow passage 22 and the through flow passage 33 are all discharge space of the mixing head with improved mixing performance, characterized in that the cylindrical space

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