JP4282057B2 - Liquid material discharge device - Google Patents

Description

[0001]
[Technical field to which industry belongs]
The present invention relates to a technical field in which a liquid material is ejected by dropping or flying, and relates to a technique for efficiently ejecting a liquid material while maintaining the properties of the liquid material in a good state.
[0002]
[Prior art]
As a technique for flying the liquid material, a liquid material storage part that stores the liquid material, a nozzle part that discharges the liquid material, a liquid feed path that communicates the storage part and the nozzle part, and the liquid feed path A plunger portion having a seal portion that is in close contact with and sliding on the inner surface, and a plunger moving means for moving the plunger portion back and forth, and in the vicinity of the nozzle side end of the liquid feed path and the liquid in the liquid feed path An apparatus comprising: a liquid feed path 2 that communicates with the vicinity of the material storage section or the liquid material storage section; and a liquid feed end of the liquid feed path 2 or a liquid feed valve disposed in the middle of the liquid feed path 2 This applicant has already proposed in Japanese Patent Application No. 2001-328313 (issued by Japanese Patent Application Laid-Open No. 2003-126750 after the application of this application) .
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-282740
[Problems to be solved by the invention]
The invention of the above-mentioned prior application has achieved the intended purpose, but has sought further work efficiency and has found the following improvements.
The prior application device has a storage container for storing the liquid material in the discharge device main body, and when the liquid material in the measuring tube is consumed, the liquid material in the storage container is sequentially sent to the measuring tube. The surface of the liquid material is in contact with air for a long time, and it has been difficult to use a highly hygroscopic liquid material or a liquid material that is denatured by air contact in the prior application apparatus.
[0005]
In addition, after the liquid material in the storage container is consumed, it is necessary to temporarily interrupt the continuous discharge operation to replenish the storage material with the liquid material, which reduces the production efficiency. It was the cause.
It is an object of the present invention to provide an apparatus that solves such problems and performs highly efficient discharge work.
[0006]
[Means for Solving the Problems]
A liquid material supply port through which the liquid material is supplied, a discharge port for discharging the liquid material, a measuring tube communicating with the liquid material supply port and the discharge port, and a plunger that slides in close contact with the inner surface of the measuring tube And a plunger moving means for moving the plunger forward and backward, an open position for communicating the measuring tube and the discharge port, and a closed position for blocking the measuring tube and the discharge port. The plunger portion includes a discharge valve and a discharge valve driving means, and the plunger portion supplies a liquid material by moving back and forth in the flow path and a flow path communicating the liquid material supply port and the measuring pipe. a valve rod for communicating or blocking the mouth and the metering tube, a discharge apparatus of a liquid material and having a valve rod drive unit.
In this device, since the liquid material does not touch the air that causes the modification between the liquid material supply port through which the liquid material is supplied and the discharge port through which the liquid material is discharged, the liquid material in a pure state Can be discharged, and the expected effect can be obtained in the functional liquid material.
In addition, since the liquid material is supplied to the measuring tube through the plunger and the measuring tube, the liquid material storage container is not required, and therefore, the work for replenishing the liquid material is not required, and an efficient operation is performed. Can do.
[0007]
Also, by disposing a discharge valve that connects or closes the plunger and discharge port at the end of the measuring tube or in the middle of the measuring tube, the liquid material is prevented from leaking from the discharge port, and to the measuring tube. In the filling of the liquid material, the work is preferably smoothed.
Furthermore, the flow path pressurized by the plunger when the plunger moves forward has a maximum flow path inner diameter and a minimum discharge port diameter, and the flow path between them always has a small diameter or the same diameter on the discharge port side. It is preferable to be configured so that the liquid material pressurizing force due to the forward movement of the plunger can be efficiently transmitted and an appropriate droplet flow velocity of the liquid material can be obtained.
[0008]
Wherein said plunger includes a plunger rod having the liquid material supply port and the tubular portion communicating with, is mounted on the distal end of the plunger rod has a hole through which the valve rod is in close contact or separated, weighed to the outer wall having a seal portion for contact with the pipe wall, it may be configured to include a plunger head, and a valve rod which is inserted into the tubular portion of the plunger rod.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The details of the present invention will be described based on an embodiment of the invention, but the present invention is not limited to the embodiment.
[0010]
≪Overall structure≫
The liquid material discharge device of the present invention includes a pump unit that discharges the liquid material, a plunger unit that supplies the liquid material to the measuring chamber and applies inertial force to the liquid material, and a frame that supports them. ing.
Details of each part will be described below.
[0011]
≪Frame body≫
As shown in FIG. 1, the frame body 1 is a screw shaft that is rotated by a guide rod that guides the plunger support body 5 in the vertical direction and a motor 2 provided in the lower part of the frame body 1 to move the plunger support body 5 in the vertical direction. And a lower frame that supports the measuring pipe 4 via the discharge valve 3.
[0012]
≪Pump part≫
In the measuring tube 4 formed of a tubular member, a plunger portion 10 that moves up and down in close contact with the inner surface of the measuring tube 4 by the vertical movement of the plunger support 5 is disposed. A discharge valve 3 is disposed at the tip of the nozzle, and a nozzle 6 having a discharge port 7 is disposed at the other end of the discharge valve 3. Here, the inner diameter of the flow path provided in the valve body of the discharge valve 3 is configured to be substantially equal to or smaller than the inner diameter of the measuring tube 4, and when the discharge valve 3 is in the open position, the liquid material is removed from the measuring tube 4. It is configured to smoothly flow to the discharge valve 3.
In this embodiment, the discharge valve 3 employs a rotary valve that takes two positions, an open position where the metering tube 4 and the nozzle 6 communicate with each other, and a closed position where the metering tube 4 and the nozzle 6 are closed. If it is equal to or smaller than the inner diameter of 4, a slide valve may be used.
[0013]
≪Plunger part≫
The plunger portion 10 has a plunger rod 11 having a tubular portion, a hole 16 attached to the distal end of the plunger rod, communicating with the tubular portion of the plunger rod, and an inner wall of the measuring tube 4 on the outer wall. It has a plunger head 12 having a seal portion that is in close contact with the wall surface, a valve rod 13 that is inserted into the tubular portion of the plunger rod 11, and a liquid material supply port 15 through which a liquid material is supplied from a storage container (not shown). And a valve mechanism comprising an air cylinder 14 as valve rod driving means 14 for opening or closing the hole 16 of the plunger head 12 by the valve rod 13.
The flow path in the plunger portion 10 of this embodiment is configured to communicate with the measuring tube 4 from the liquid material supply port 15 through the inside of the plunger rod 11 and the hole 16 of the plunger head 12.
[0014]
≪Liquid material discharge work≫
Next, a liquid material discharge operation using the liquid material discharge apparatus having the above configuration will be described.
In a state where no liquid material is introduced into the measuring tube 4,
The discharge valve 3 is opened, the motor 2 is operated, and the plunger head 12 of the plunger portion 10 is moved forward to a position closest to the discharge valve 3. Thereby, the air filled in the measuring tube 4 is discharged from the nozzle 6.
Next, the discharge valve 3 is closed, the valve rod driving means 14 (air cylinder) is operated to separate the valve rod 13 and the plunger head 12, and then the motor 2 is operated to move the plunger of the plunger unit 10. The head 12 is moved backward, and the measuring tube 4 is filled from the storage container (not shown) through the liquid material supply port 15 through the plunger rod 11 and the plunger head 12.
[0015]
Further, after the plunger head 12 is moved forward and brought into close contact with the liquid material, the valve rod driving means 14 (air cylinder) is operated to bring the valve rod 13 and the plunger head 12 into contact with each other. The communication between the flow path inside the rod 11 and the measuring tube 4 is blocked.
Thereby, the bubbles remaining in the measuring tube 4 are isolated from the measuring tube 4 into the flow path inside the plunger rod 11.
[0016]
Next, the discharge valve 3 is opened, the motor 2 is operated, the plunger is rapidly advanced and stopped by a specified amount, and an inertial force is applied to the liquid material in the measuring tube 4 to discharge the discharge port 7 at the tip of the nozzle 6. More liquid droplets are discharged.
Moreover, it is also possible to discharge droplets continuously by repeating rapid advance and rapid stop of the plunger.
[0017]
Here, since the flow path from the measuring tube 4 to the discharge port 7 always has a small diameter toward the discharge port 7, the flow rate of the liquid material from the measuring tube 4 to the discharge port 7 is discharged from the measuring tube 4. The flow rate becomes higher toward the outlet 7, and a flow rate of the liquid material sufficient for flying droplets can be obtained at the discharge port 7 at the tip of the nozzle 6.
Further, in the repetition of such a discharge operation, the distal end position of the plunger 13 is always moved backward from the fixed position and moved forward from the fixed position so that the operation of the plunger 13 becomes uniform for each discharge. It is also possible to fill the measuring tube 4 every time.
[0018]
【The invention's effect】
As described above, according to the present invention, since the liquid material is supplied to the measuring tube through the plunger pressurized from the liquid material supply port, the liquid material is discharged from the tip of the nozzle without contacting the air in the apparatus. The liquid material can be effectively prevented from being denatured and a pure liquid material can be discharged. Further, as compared with an apparatus having a storage container due to the configuration without a storage container, the liquid material replenishment work that interrupts the discharge work can be eliminated, and an efficient discharge work can be performed.
[Brief description of the drawings]
FIG. 1 is a schematic view of a liquid material discharge device with a major part broken away.
[Explanation of symbols]
1 Frame 2 Motor 3 Discharge valve (rotary valve)
4 Metering Tube 5 Plunger Support 6 Nozzle 7 Discharge Port 10 Plunger Part 11 Plunger Rod 12 Plunger Head 13 Valve Rod 14 Valve Rod Driving Means (Air Cylinder)
15 Liquid material supply port 16 holes

Claims (5)

A liquid material supply port through which the liquid material is supplied;
A discharge port for discharging the liquid material;
A measuring tube communicating the liquid material supply port and the discharge port;
A plunger portion having a plunger that slides in close contact with the inner surface of the measuring tube;
Plunger moving means for moving the plunger forward and backward ;
A discharge valve having an open position for communicating the metering tube and the discharge port; a closed position for blocking the metering tube and the discharge port; and a discharge valve driving means .
The plunger includes a flow path that communicates the liquid material supply port and the metering pipe, a valve rod that moves forward and backward in the flow path to communicate or block the liquid material supply port and the metering pipe, and a valve. A liquid material discharge device comprising: a rod driving means . The flow path toward the discharge port from the metering tube is pressurized by a plunger during the advancing movement of the plunger, the maximum diameter of the flow path and the inner diameter of the measuring tube, and a discharge diameter of the smallest diameter of the passage and the liquid material discharge device according to claim 1, wherein the discharge port side of the flow path, characterized in that configured to always a smaller diameter or same diameter compared to the metering tube side. It said plunger includes a plunger rod having a tubular portion communicating with the liquid material supply port, is attached to the distal end of the plunger rod has a hole through which the valve rod is in close contact with or separated from, the metering tube wall to the outer wall having a seal portion in close contact, and the plunger head, ejecting apparatus according to claim 1 or 2, wherein the liquid material characterized in that it is configured to include a valve rod which is inserted into the tubular portion of the plunger rod. The liquid material discharge device according to any one of claims 1 to 3, wherein the discharge valve is a rotary valve or a slide valve. 5. The liquid material according to claim 1, wherein the liquid material supply port is disposed in an upper portion of the plunger portion and is connected to an external liquid material storage container. Discharge device.

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