JPS5936410Y2 - Mixing injection head device for foaming synthetic resin stock solution - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mixing injection head device for a stock solution of urethane resin or other foamable synthetic resin, which is applied to, for example, an automobile production line.

Conventionally, in this type of device, a head body includes at least two types of liquid injection nozzles, a mixing chamber in which the liquid liquids from the nozzles are mixed with each other, and a nozzle passage that leads the chamber to an injection port in front of the mixing chamber. A self-contained type is known, but in this case, the main body must further be provided with a cleaning means for cleaning the inside of the main body upon completion of injection.

Conventionally, there are known methods for this purpose, such as one that squirts the solvent into the nozzle passage, and one that pushes a plunger into the passage, but the former leaves the injection port as it is, that is, the nozzle touch. However, it cannot be carried out in S, and must be carried out at a separate location, which is troublesome and causes problems in the working environment due to the presence of solvents.

Furthermore, in the latter case, the undiluted solution tends to stick and get caught in the passageway between the plunger and the plunger, and thus the plunger is subjected to a large sliding resistance, so this is caused by hydraulic operation with a large pressing force. Therefore, the entire device inevitably becomes quite dog-shaped and heavy-duty.

The purpose of the present invention is to obtain a device free of such inconveniences.Inside the head body 1, there are provided an injection nozzle 2 for the first undiluted solution, an injection nozzle 3 for the second undiluted solution, and both nozzles 2, 3. a mixing chamber 4 for mutually mixing both stock solutions injected from the chamber 4;
A nozzle passage 6 that leads the inside to an injection port 5 in front of the mixing chamber 4, and a blowhole 8 connected to an external pressurized air supply source via an air supply passage 7 at the top of the mixing chamber 4; It is equipped with an air-operated control valve 9 that opens and closes this.

Each injection nozzle 2, 3 is provided with each circulation switching valve 10, 11 between each stock solution supply source 2ay3a, so that each stock solution is normally circulated on each supply source side, and is transferred to each nozzle 2 as necessary.
, 3.

The operation is performed using push buttons 10a for each operation on the top surface of the main body 1.
, lla.

The control valve 9 is, for example, a needle valve as clearly shown in FIGS. 3 and 4, and is pushed upward and opened by the pressurized air introduced through the air supply path 7. A second air supply passage 12 is provided on the upper surface thereof, and the second air supply passage 12 is switched to
According to the pressure air introduced through 2, it was pushed down and closed.

This switching operation is performed by the corresponding pushbuttons 7a and 12a on the top surface of the main body 1 described above.

To explain its operation, when each stock solution is injected through each injection nozzle 2, 3, these are mixed together in the mixing chamber 4 to obtain a predetermined foaming stock solution, and then the nozzle magnetic path 6 It flows out from the injection port 5 through the injection port 5, and can be injected into the appropriate position of the car body a on the production line A, for example, as shown in the second diagram.Then, when the injection is completed, in order to clean the inside of the car body, Pressure air may be introduced through the intake passage 7.

That is, the air acts on the control valve 9 to open it as shown in the fourth figure, and is injected into the mixing chamber 4 from the X jet hole 8, and the nozzle passage in the chamber 4 and downstream thereof. Any stock solution remaining in the container 6 is blown away and removed.

Furthermore, this jet of pressurized air. A slight ramp at the end of the injection of the stock solution, or immediately after its completion, is preferred, so that the stock solution can be easily removed prior to initiation of the foaming reaction.

When the air supply is then switched to the air supply path 12, the valve 9 is closed as shown in the third figure to prepare for the next injection operation.

In this way, according to the present invention, the top of the mixing chamber 4 is provided with a blowhole 8 connected to a pressurized air supply source and an air-operated control valve 9 for opening and closing the blowhole, and pressurized air is injected through the blowhole 8. It is possible to clean the inside easily and reliably, it does not have the above-mentioned disadvantages of the conventional one, the whole can be made into a relatively compact device, and it has the effect of improving work efficiency. .

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of the proposed device, Fig. 2 is a perspective view of an example of the device in use, Fig. 3 is a cutaway side view of its main parts, and Fig. 4 explains the operation of a part of it. FIG. 1... Head body, 2, 3... Injection nozzle 4...
・Mixing chamber, 5... Inlet, 6... Nozzle passage, 7.
-・Air supply path. 8... Fumarole, 9... Control valve.

Claims (1)

[Claims for Utility Model Registration] Inside the head body 1, there is a spray nozzle 2 for a first stock solution. A type that includes a second stock solution injection nozzle 3 and a mixing chamber 4 that mutually mixes both stock solutions sprayed from both nozzles 2 and 3, and a nozzle passage 6 that guides the inside of the chamber 4 to an injection port 5 in front of the mixing chamber 4. In the foaming type, the top of the mixing chamber 4 is provided with a blowhole 8 connected to an external pressurized air supply source via an air supply path 7, and an air-operated control valve 9 for opening and closing the blowhole. Mixing injection head device for synthetic resin stock solution.