JP4618739B2 - Liquid material discharge method and apparatus - Google Patents

Description

The present invention relates to the field of pressurizing a liquid material with a plunger that slides in close contact with the inner wall surface of the liquid feed path and ejects it from a nozzle. The liquid material is prevented from unnecessary leakage, and the plunger is placed to reduce the volume of pressure applied to the liquid material and discharge accurately, and the loss of the liquid material during the removal of bubbles in the liquid material is eliminated. The present invention relates to a method and an apparatus for discharging a liquid material that efficiently uses the liquid material.
Here, the term “discharge” refers to discharging, dropping, or flying a liquid material.

  As a technology for splashing liquid material, a plunger that performs a backward movement and a backward movement is used, and the liquid material located in front of the plunger is stopped suddenly by abutting the rapidly advancing plunger against the valve seat. Inertia force is applied to the liquid material, and the technique of flying liquid material by this inertial force is known. In this technology, the inertial force necessary to make the liquid material splash is applied to a solid valve seat that stops. The plunger and valve seat are severely damaged to contact the moving solid plunger and stop the movement of the plunger instantly, and the damaged piece of material is mixed and dissolved in the liquid material. There was a problem that.

  Therefore, in order to solve the above problem, the present applicant makes the tip of the plunger for discharging the liquid material closely contact the liquid material, then advances the plunger at a high speed, and then suddenly stops the plunger driving means. Proposes a technique to stop the abruptly moving plunger abruptly without contacting the valve seat, apply inertial force to the liquid material located in front of the plunger, and drop the liquid material by this inertial force (Japanese Patent Application No. 2001-319074).

JP 2000-312851 A JP 2001-287798 A Japanese Patent Laid-Open No. 08-080464

  The invention of the prior application was able to achieve the intended purpose, but the following problems occurred at the stage of implementing the invention.

  If the plunger moves back and forth repeatedly, the liquid material that exudes gradually from the plunger seal will dry and adhere to the inner wall surface of the metering unit, hindering the sliding smoothness of the plunger, resulting in quantitative discharge characteristics. In addition, the liquid material may leak from the seal portion, and eventually the liquid material may not be discharged.

  Further, in the above-described apparatus, in order to follow the path of the liquid material flowing from the storage container for storing the liquid material into the measuring tube via the liquid material supply valve, the liquid material is removed from the measuring tube by the advance operation of the plunger. In a discharge system in which the liquid material reaching the material supply valve is pressurized and a rapid pressure increase is desired, an unnecessary liquid material occupation space is expanded, which is a factor that hinders the rapid pressure increase.

  Furthermore, in the device, in order to release the discharged gas from the discharge hole provided in the plunger rod to the outside air, the liquid may be discharged mixed with the bubble group. This must be wiped off by means such as Wes.

  For this reason, since the liquid material adheres to the plunger member, the apparatus becomes dirty, and the liquid is wasted although it is a small amount. In particular, even a small amount of expensive liquid cannot be wasted, but considering the effect of bubbles on the fixed amount discharge, that is, since a fixed amount discharge cannot be expected with a liquid mixed with bubbles, the expensive liquid is wasted. I had to discharge the bubbles. Moreover, when making it drop, it may not be dropped because of the bubble.

 Accordingly, the present invention has an object to solve such problems and to provide a method and apparatus for discharging, dropping, and flying droplets with high accuracy, and to effectively discharge bubbles mixed in the liquid material. It is an object of the present invention to provide a liquid ejection method and apparatus that can be used for ejection, dripping, and flying droplets without wasting any liquid material mixed and discharged in the bubble group during the removal operation.

  The gist of the present invention is a liquid material discharge method in which a liquid material is pressurized and discharged from a nozzle by a plunger that is in close contact with and slides on the inner wall surface of a liquid feed path that communicates the nozzle and the reservoir.

  The plunger is disposed in the middle of the space filled with the liquid material. In this case, the present invention provides a liquid feed path that is disposed in the middle of the space filled with the liquid material and communicates the nozzle and the storage portion. The liquid material is discharged from a nozzle by pressurizing the liquid material with a plunger that slides in close contact with the inner wall surface.

  The nozzle side liquid material is divided into the nozzle side liquid material part and the storage container side liquid material part by the sliding surface of the plunger part that slides in close contact with the inner wall surface of the liquid feed path. In this case, the present invention is in close contact with the inner wall surface of the liquid feed path that communicates the nozzle and the reservoir. The nozzle side liquid material part and the storage container side liquid material part are divided by the sliding surface of the plunger part, which is disposed in the middle of the space that is preferably filled with the liquid material, and the divided liquid Among these, the liquid material of the nozzle side liquid material part is a liquid material discharge method characterized by causing the plunger part to advance and discharge in the liquid feed path.

  The plunger part has a valve mechanism that allows the liquid material part on the nozzle side to communicate with the liquid material part on the storage container side or shuts it off, and the liquid material is discharged by advancing operation in the liquid feed path with the valve mechanism closed. In that case, the present invention provides a plan in which the nozzle slides in close contact with the inner wall surface of the liquid passage that communicates the reservoir and the reservoir, preferably disposed in the middle of the space filled with the liquid material. The nozzle-side liquid material part and the storage container are divided into the nozzle-side liquid material part and the storage container-side liquid material part by the sliding surface of the jar part. A liquid material discharge method, wherein a plunger portion having a valve mechanism for communicating with or blocking a side liquid material portion causes the valve mechanism to be closed to advance and discharge in the liquid feed path. It is.

  The tip of the plunger portion is composed of a plunger head arranged in the flow path, and the plunger head advances and moves in the liquid material to discharge the liquid material. The nozzle-side liquid material portion and the nozzle-side liquid material portion are slid in close contact with the inner wall surface of the liquid feed path communicating with the portion, preferably disposed in the middle of the space filled with the liquid material. Of the divided liquid, the liquid material of the nozzle side liquid material part is divided into the storage container side liquid material part, and the plunger part composed of the plunger head whose tip is arranged in the flow path is A liquid material discharge method is characterized in that a plunger head moves forward in a liquid material and is discharged.

  The nozzle side liquid material part is a closed region, preferably the end of the liquid feed path, or a closed region by a discharge valve disposed in the middle of the liquid feed path, more preferably a blockage that closes the discharge port at the tip of the nozzle A first step of making a closed region by means, a second step of retreating the plunger part to supply liquid from the liquid material storage part into the liquid feed path, and advancing and discharging the plunger part In this case, the present invention is disposed in the middle of the space that is in close contact with and slides on the inner wall surface of the liquid feed path that communicates the nozzle and the reservoir. The plunger portion is divided into a nozzle side liquid material portion and a storage container side liquid material portion by the sliding surface of the plunger portion, and among the divided liquids, the plunger portion removes the liquid material of the nozzle side liquid material portion. This is a method of discharging in the liquid feed path and closing the nozzle side liquid material part Preferably, the first region is a closed region by a closing means for closing the discharge port at the tip of the nozzle. And the second step of retreating the plunger part to supply the liquid from the liquid material storage part into the liquid feed path, and the third step of advancing the plunger part and discharging it. This is a method for discharging a liquid material.

  The first step includes a fifth step of communicating the nozzle side liquid material portion and the storage portion side liquid material portion, and preferably the fifth step is based on a valve mechanism provided in the plunger portion. And a fourth step of removing bubbles of the liquid material in the liquid feed path is included between the second step and the third step as necessary. The nozzle-side liquid material part is slid in close contact with the inner wall surface of the liquid feed path communicating with the storage part, and preferably disposed in the middle of the space filled with the liquid material. The liquid material part of the nozzle side liquid material part is divided into the liquid material part and the storage container side liquid material part. A valve mechanism preferably including a fifth step of communicating the side liquid material part and the storage part side liquid material part, preferably provided in the plunger part Including the fifth step, wherein the nozzle-side liquid material portion is a closed region, or preferably a closed region by a discharge valve disposed at the end of the liquid feed path or in the middle of the liquid feed path, more preferably the nozzle A first step of closing the discharge port at the tip to a closed region, a second step of retracting the plunger portion to supply liquid from the liquid material storage portion into the liquid feed path, and a plan A fourth step of removing the bubbles of the liquid material in the liquid feeding path between the second step and the third step as necessary. A liquid material discharge method comprising:

  The fourth step includes a sixth step in which the nozzle side liquid material portion is set as a closed region and the nozzle side liquid material portion and the storage portion side liquid material portion are communicated with each other. In this case, the present invention is disposed in the middle of the space filled with the liquid material, preferably sliding in close contact with the inner wall surface of the liquid feed path communicating with the nozzle and the reservoir. The plunger part is divided into a nozzle side liquid material part and a storage container side liquid material part by the sliding surface of the plunger part, and among the divided liquids, the plunger part supplies the liquid material of the nozzle side liquid material part to the liquid feeding path. A method of discharging by performing an advancing operation inside, including a fifth step of communicating the nozzle side liquid material part and the storage part side liquid material part, preferably a fifth by a valve mechanism provided in the plunger part Including this process, the liquid material part on the nozzle side is the closed region, or it is arranged at the end of the liquid feed path or in the middle of the liquid feed path. A first step of setting the closed region by the discharged discharge valve, more preferably the closed region by the closing means for closing the discharge port at the tip of the nozzle; It consists of a second step for supplying liquid from the reservoir, and a third step for advancing and discharging the plunger, and if necessary, between the second step and the third step Including a fourth step of removing bubbles of the liquid material in the passage, wherein the fourth step includes setting the nozzle side liquid material portion as a closed region, and combining the nozzle side liquid material portion and the storage portion side liquid material portion. The liquid material discharge method is characterized by comprising a sixth step of communicating and a seventh step of moving forward the plunger portion.

  In addition, the present invention is in close contact with a liquid material storage part that stores a liquid material, a nozzle part that discharges the liquid material, a liquid feed path that communicates the storage part and the nozzle part, and an inner surface of the liquid feed path And a plunger part having a seal part that slides and a plunger moving means for moving the plunger part back and forth, near the nozzle side end of the liquid feed path and near the liquid material storage part of the liquid feed path Alternatively, a liquid material comprising: a liquid feed path 2 that communicates with 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. The gist of the discharge device is as follows.

  In addition, the present invention is in close contact with a liquid material storage part that stores a liquid material, a nozzle part that discharges the liquid material, a liquid feed path that communicates the storage part and the nozzle part, and an inner surface of the liquid feed path A plunger part having a seal part that slides, a plunger moving means for moving the plunger part back and forth, a discharge valve arranged at the nozzle side end of the liquid feed path or in the middle of the liquid feed path, and a discharge A liquid feed path 2 that communicates between the valve and the liquid material reservoir near the liquid feed path or the liquid material reservoir, and the discharge valve has a first position that communicates the liquid feed path and the nozzle; The gist of the liquid material discharge apparatus is characterized in that it takes a second position where the liquid feed path and the liquid feed path 2 communicate with each other.

  Furthermore, the present invention provides a liquid material storage part that stores a liquid material, a nozzle part that discharges the liquid material, a liquid feed path that communicates the storage part and the nozzle part, and an inner surface of the liquid feed path. A plunger portion having a seal portion that slides in close contact, and the plunger portion includes a valve mechanism that communicates or shuts off the nozzle portion and the storage portion, preferably the liquid feed A discharge valve is provided in the vicinity of the nozzle side end of the passage or in the middle of the liquid feeding path, and the inner diameter of the liquid feeding path and the inner diameter of the discharge valve are substantially the same as necessary. The gist is a liquid material discharge device.

More specifically, in the liquid material discharge device of the present invention, the plunger portion has a tubular portion, and the tubular portion has a plunger rod having a hole 1 communicating with an outer wall surface, and the plunger A plunger head mounted on the tip of the rod, having a hole 2 communicating with the tubular portion of the plunger rod, and having a seal portion in close contact with the inner wall surface of the liquid feed path on the outer wall; and the tubular portion of the plunger rod A valve rod inserted into the valve head, a valve rod driving means for bringing the valve rod into close contact with or away from the plunger head, a valve rod, and a valve driving means for moving the valve rod forward and backward. To do.
In that case, the liquid material discharge device closes the discharge valve and opens the valve rod inserted into the plunger head and the tubular portion of the plunger rod, and retracts the plunger portion, A second step of supplying liquid from the liquid material reservoir into the liquid feed path, and a second step of moving the liquid material from the reservoir side liquid material portion to the nozzle side liquid material portion by retreating the plunger portion. Then, the liquid material is discharged by the third step of opening the discharge valve and closing the valve rod and the fourth step of moving the plunger portion forward.

  Thus, according to the present invention, since the sliding surface of the plunger and the inner surface of the liquid feed path in which the plunger slides are always in contact with the liquid material, the sliding surface of the plunger and the plunger are Since the inner surface of the liquid flow path that comes into sliding contact does not dry out and stick, the increase in unnecessary sliding resistance caused by these movements of the plunger is effectively prevented, and liquid material is discharged, dripped, and droplets with high precision. can do.

  In addition, since it is possible to construct an apparatus that eliminates the need for a piping branch for supplying the liquid material in the liquid feed path to be pressurized, it is possible to efficiently press the minimum necessary liquid material, and therefore the liquid material. Can be discharged, dripped and ejected with high precision.

  In the operation of removing bubbles mixed in the liquid material, the liquid material discharged in the bubble group can be reused while effectively removing the bubbles. It is not wasted at all and can be used effectively for ejection, dripping and flying.

  The liquid divided into the nozzle side liquid material part and the storage container side liquid material part by the sliding surface of the plunger part that is in close contact with and slides on the inner wall surface of the liquid feed path in which the nozzle and the liquid material storage part communicate with each other Among the materials, the liquid material of the nozzle side liquid material portion is discharged by performing an advancing operation in the plunger portion liquid feed path. Here, the discharge amount of the liquid material is defined by the advancement movement amount of the plunger portion, and the plunger liquid feed path has the sliding surface of the plunger portion arranged in the flow path, so the tip of the plunger portion is Always contact the liquid material.

Preferably, the plunger portion having a valve mechanism for communicating or blocking the nozzle-side liquid material portion and the storage container-side liquid material portion is operated to advance in the liquid feed path with the valve mechanism closed. Then, the liquid material is discharged.
Since the plunger portion is provided with a valve mechanism, it is not necessary to branch the flow path for supplying the liquid material.
In particular, during discharge, the valve mechanism is closed and advanced to prevent pressurization for discharging the liquid material.

Preferably, the distal end of the plunger portion is constituted by a plunger head disposed in the flow path, and the plunger head moves forward in the liquid material.
The plunger head at the tip of the plunger section that directly pressurizes the liquid material to be discharged is always located in the liquid material because the plunger is disposed in the flow path, and the outer peripheral surface of the plunger head is Contact liquid material.

Here, the discharging step is a first method in which the nozzle side liquid material portion is closed by the closing means in the discharging method of the liquid material in which the plunger portion moves in close contact with the inner wall surface of the liquid feeding path. The second step of retreating the plunger part and supplying the liquid from the liquid material storage part into the liquid feed path, and the third step of advancing and discharging the plunger part. Is called.
Preferably, the first step includes a fifth step of communicating the nozzle side liquid material part and the storage container side liquid material part.

  More preferably, it includes a fourth step of removing bubbles of the liquid material in the liquid feeding path between the second step and the third step, and more preferably, the fourth step includes: A sixth step in which the nozzle-side liquid material portion is closed by the closing means, and the nozzle-side liquid material portion and the storage portion-side liquid material portion are communicated; and a seventh step in which the plunger portion is moved forward. And consist of

It is preferable that the closing means is a discharge valve disposed at the end of the liquid feed path or in the middle of the liquid feed path. By setting the discharge valve to the closed position, the closed region can be set, and the closing means may close the discharge port at the tip of the nozzle. Specifically, the discharge port can be closed by means such as a cap.
Here, it is preferable that the fifth step is performed by a valve mechanism provided in the plunger portion.

  In the valve mechanism provided in the plunger portion, a twenty-first step of closing the discharge valve and opening the valve rod, and a twenty-first step of opening the plunger valve mechanism when the nozzle-side liquid material portion is closed. And 22) a step of retreating the plunger part to supply the liquid from the liquid material storage part into the measuring part, and a movement of the plunger part back to move the nozzle side liquid material from the storage side liquid material part. It is preferable to discharge the liquid material by the 23rd step of moving the liquid material to the portion, the 24th step of opening the discharge valve and closing the valve rod, and the 25th step of moving the plunger portion forward.

  A liquid material storing part for storing the liquid material, a nozzle part for discharging the liquid material, a liquid feeding path for communicating the storing part and the nozzle, and a seal part that is in close contact with and slides on the inner surface of the liquid feeding path And a plunger moving means for moving the plunger part forward and backward, and the vicinity of the nozzle side end of the liquid feed path and the vicinity of the liquid material reservoir or the liquid material reservoir of the liquid feed path A liquid feed path 2 that communicates with the liquid feed path end of the liquid feed path 2 or a liquid feed valve arranged in the middle of the liquid feed path 2.

  Unlike the prior art, where only the plunger pressure surface is in contact with the liquid, the inner wall of the liquid feed path where the plunger is placed in the liquid material flow path and is always sunk in the liquid material, and the plunger slides Since the liquid material is always in contact with the liquid, the liquid material does not dry and adhere to the plunger surface and the inner wall surface of the liquid feed path. In addition, the liquid material leaks unnecessarily from the plunger, so that the liquid material does not adhere to a place where contact with the liquid is not preferable in principle due to the device configuration.

  A liquid feed path is provided between the liquid material storage section in which the liquid material is stored and the nozzle that discharges the liquid material, and the plunger is slid in close contact with the inner wall surface of the liquid feed path. Pressurize and discharge from nozzle.

In order to supply the liquid material from the liquid material storage part to the liquid feed path, it is necessary to seal the nozzle side liquid material part located on the nozzle side among the liquid materials divided by the plunger.
The discharge valve is necessary for that purpose, and for example, the nozzle tip may be capped and sealed without using the discharge valve.

  Further, in the invention of the discharge device, the liquid material storage part for storing the liquid material, the nozzle part for discharging the liquid material, the liquid feed path for communicating the storage part and the nozzle part, and the liquid feed A plunger portion having a seal portion that slides in close contact with the inner surface of the path, and further includes a vicinity of a nozzle side end of the liquid feed path and a vicinity of the liquid material reservoir or the liquid material reservoir of the liquid feed path. A liquid feed path 2 that communicates with 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, wherein the liquid feed path 2 is in close contact with the inner surface of the liquid feed path. The liquid material divided by the sliding surface of the moving plunger portion is communicated through a valve, so that the liquid material can be supplied to the liquid feed path 1.

<Action>
The present invention includes a liquid material storage part that stores a liquid material, a nozzle part that discharges the liquid material, a liquid feed path that communicates the storage part and the nozzle, and an inner surface of the liquid feed path. A plunger part having a moving seal part, and a plunger moving means for moving the plunger part back and forth, near the nozzle side end of the liquid feed path and near the liquid material storage part or liquid material in the liquid feed path A liquid feed path 2 that communicates with the reservoir, and a liquid feed end of the liquid feed path 2 or a liquid feed valve arranged in the middle of the liquid feed path 2 are provided.
Unlike the prior art, where only the plunger pressure surface is in contact with the liquid, the inner wall of the liquid feed path where the plunger is placed in the liquid material flow path and is always sunk in the liquid material, and the plunger slides Since the liquid material is always in contact with the liquid, the liquid material does not dry and adhere to the plunger surface and the inner wall surface of the liquid feed path. Further, in principle, the liquid material does not leak from the plunger, and the liquid material does not adhere to the portion where the liquid contact is not preferable.

The present invention provides a plunger that slides in close contact with the inner wall surface of the liquid feed path, provided with a liquid feed path between a liquid material storage section that stores the liquid material and a nozzle that discharges the liquid material. The liquid material is pressurized and discharged from the nozzle.
In order to supply the liquid material from the liquid material storage part to the liquid feed path, it is necessary to seal the nozzle side liquid material part located on the nozzle side among the liquid materials divided by the plunger.
The discharge valve is necessary for that purpose, and for example, the nozzle tip may be capped and sealed without using the discharge valve.

When the plunger that moves rapidly forward is suddenly stopped and a large inertial force is applied to the liquid material, the amount of droplets in the liquid material in the nozzle side liquid material part is controlled by the moving speed and distance of the plunger, etc. Discharges flying droplets.
Further, when the plunger rapidly moves forward and stops rapidly, an inertial force is applied to the liquid material of the nozzle side liquid material portion, and a droplet is discharged from the nozzle tip. In this discharge operation, the liquid material in the nozzle-side liquid material portion divided by one advance operation is discharged repeatedly in rapid advancement and rapid stop.
It should be noted that by adjusting the moving speed and moving distance of the plunger, it is possible to drop the liquid material of the nozzle-side liquid material portion divided by one advance operation at a time.

  Therefore, in order to make the liquid material splash, the acceleration of the plunger, that is, the speed difference is important, and it is necessary to move the plunger at a high speed in advance and then stop it suddenly. In order to increase the speed to a speed necessary for causing the liquid material to fly, an acceleration moving distance for accelerating the plunger is required.

  In addition, since the droplet discharge amount depends on the plunger travel distance, if the plunger travel distance is short, the plunger speed required for the droplet cannot be obtained. From the relationship with the movement speed of the plunger appropriate for the liquid material to be splashed, determine the specifications of the liquid feed path and the plunger so that the movement distance sufficient for the plunger to obtain the speed is obtained. .

  Furthermore, in order to reduce the amount of flying droplets, it is desirable to reduce the plunger operating range (movement distance), but in order to obtain the speed of the plunger for causing droplets to drop, the plunger operating range (movement distance) ) To simultaneously satisfy the conflicting phenomenon of wanting to enlarge, by narrowing the liquid feed path, securing the plunger movement amount to obtain the plunger speed for flying droplets, by narrowing the liquid feed path, Even if the plunger moves greatly, the moving volume, that is, the amount of droplets is made very small.

Hereinafter, examples of the present invention will be described with reference to the drawings. However, the present invention is not limited to these examples.
In the first to third embodiments, the same members will be described with the same reference numerals.

  In the first embodiment, as shown in FIG. 1, a liquid material storage part 1 that stores a liquid material, a nozzle part 3 that discharges the liquid material, and a liquid feed path 2 that communicates the storage part and the nozzle part 3. A plunger part 4 having a seal part that slides in close contact with the inner surface of the liquid feed path 2, plunger moving means 5 for moving the plunger part 4 back and forth, liquid material storage part 1 and liquid feed The liquid feed path 6 communicates with the vicinity of the nozzle side end of the path 2, the liquid feed valve 7 disposed in the middle of the liquid feed path 6, and the frame body 9 that supports these parts.

  The frame body 9 includes a guide rod that guides the plunger support body in the vertical direction, an upper frame body that supports a screw shaft that moves the plunger support body in the vertical direction, and a liquid container that constitutes the liquid material storage unit 1. It is comprised with the support frame body which supports.

The liquid material storage part 1 is a container formed by a cylindrical main body part and a dish-shaped bottom part that are open at the top, and a liquid feed path connection part is opened at the bottom part. Are connected to each other. Therefore, the storage container surrounds the liquid feed path 2, and a part of the plunger part 4 is immersed in the liquid material in the container of the storage part 1 during operation.
The liquid feed path 2 has a cylindrical shape and is provided with a nozzle at the lower end, and a liquid material discharge pump is constituted by a plunger provided with a seal portion that is in close contact with the inner peripheral surface of the liquid feed path 2.

  The liquid material reservoir 1 and the liquid feed path 2 are connected to each other via a liquid feed valve 7, and the liquid material in the liquid material reservoir 1 is sent via the liquid feed valve 7 to the liquid feed path 2. The liquid material supplied to the liquid feed path 2 is applied with an inertial force by the rapid advance and stop of the plunger, and is discharged from the nozzle as droplets.

  FIG. 2 shows another embodiment of the present invention. A liquid material discharge device according to this embodiment includes a liquid material storage section 1 for storing a liquid material, a nozzle section 3 for discharging a liquid material, and the storage section. A liquid feed path 2 that communicates with the nozzle part 3, a plunger part 4 that has a seal part that slides in close contact with the inner surface of the liquid feed path 2, and a plunger that moves forward and backward through the plunger part 4 The moving means 5, the discharge valve 8 disposed in the nozzle side end of the liquid feed path 2 or in the middle of the liquid feed path 2, and the vicinity of the liquid material reservoir 1 or the liquid material reservoir 1 of the discharge valve 8 and the liquid feed path 2 The liquid feed path 6 that communicates with each other and a frame body 9 that supports these parts, the discharge valve 8 includes a first position that communicates the liquid feed path 2 and the nozzle, and a liquid feed path 2 and a second position where the liquid feed path 6 communicates with each other.

  FIG. 3 shows still another embodiment of the present invention. A liquid material discharge device according to this embodiment includes a liquid material storage section 1 for storing a liquid material, a nozzle section 3 for discharging a liquid material, and the storage. A liquid feed path 2 that communicates between the nozzle part 3 and the nozzle part 3, a plunger part 4 that has a seal part that slides in close contact with the inner surface of the liquid feed path 2, and a plan that moves the plunger part 4 forward and backward The jar moving means 5 and a frame body 9 that supports each of these parts, the plunger part 4 includes a valve mechanism for communicating or blocking the nozzle part 3 and the storage part, and A discharge valve 8 having a flow path having the same diameter as the inner diameter of the liquid feed path 2 is provided in the vicinity of the nozzle side end of the liquid feed path 2.

  Further, the plunger portion 4 in this embodiment is provided with a bubble removing mechanism shown in FIG. The plunger portion 4 has a tubular portion, and the tubular portion is attached to a plunger rod 11 having a hole 15 communicating with an outer wall surface, and a distal end of the plunger rod 11, and the plunger rod 11 has a tubular shape. A plunger head 12 having a bubble vent hole 14 communicating with the portion and having a seal portion 13 in close contact with the inner wall surface of the liquid feed path 2 on the outer wall, and a valve rod 16 inserted into the tubular portion of the plunger rod 11. And an air cylinder 17 as a valve rod driving means for opening or closing the air bubble releasing hole 14 of the plunger head 12, and operating the air cylinder 17. When the valve rod 16 is moved backward, the valve rod 16 moves in the length direction of the plunger rod 11, and the valve rod 16 moves. The distal end portion of the rod 16 is separated from the plunger head 12 to open a bubble vent hole 14 provided in the plunger head 12, and through the bubble vent hole 14 and a gap between the plunger rod 11 and the valve rod 16. Communicating with the outside world, the plunger portion 4 is moved forward to discharge the air bubbles in front of the plunger head 12 to the outside.

  Note that the above-described bubble removal mechanism can also be applied to the first and second embodiments, and the valve rod can be moved by using a screw as in the prior application.

It is a conceptual diagram which shows one Example of this invention, (a) is a front view, (b) is a side view. It is a conceptual diagram which shows another Example, (a) is a front view, (b) is a side view. It is a conceptual diagram which shows another Example, (a) is a front view, (b) is a side view. It is principal part sectional drawing of the Example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid material storage part 2 Liquid feed path 3 Nozzle part 4 Plunger part 5 Plunger moving means (motor)
DESCRIPTION OF SYMBOLS 6 Liquid feed path 7 Liquid feed valve 8 Discharge valve 9 Frame 10 Storage container 11 Plunger rod 12 Plunger head 13 Sealing part 14 Air bubble removal hole 15 Hole 16 Valve rod 17 Valve rod drive means (air cylinder)

Claims (14)

The liquid material storage part that stores the liquid material, the nozzle that discharges the liquid material, the liquid feed path (2) that connects the liquid material storage part and the nozzle, and the inner wall surface of the liquid feed path (2) Providing a plunger having a sliding wide seal portion (13), and a discharge valve for communicating or blocking the liquid feed path (2) and the nozzle,
The liquid material in the liquid feed path (2) is divided into the nozzle side liquid material part and the storage part side liquid material part by the seal part (13), and the plunger side liquid material part is rapidly advanced and stopped rapidly. A liquid material discharge method for applying an inertial force to the liquid material of the portion and discharging from the nozzle,
Providing a flow path for communicating the nozzle side liquid material part and the storage part side liquid material part;
A switching valve for communicating or blocking the flow path is provided fixed in the middle of the flow path,
When ejecting the liquid material, a liquid feed passage and (2) a nozzle in communication with the discharge valve, the nozzle side liquid material portion and the reservoir portion side liquid material portion blocks the passage for communicating the through switching valve, Plan Going forward,
When supplying the liquid material to the nozzle side liquid material part, the liquid feed path (2) and the nozzle are shut off by the discharge valve, and the nozzle side liquid material part and the storage part side liquid material part are communicated by the switching valve. discharging method of the liquid material, characterized in that road by communicating, to retract the plunger. The flow path connecting the nozzle side liquid material part and the storage part side liquid material part is communicated between the vicinity of the nozzle side end of the liquid feed path (2) and the vicinity of the liquid material storage part of the liquid feed path (2) or the storage part. Consisting of the liquid feed path (6)
2. The liquid material discharge method according to claim 1, wherein the switching valve is constituted by a liquid feed valve (7) that communicates or blocks the liquid feed path (6). The liquid passage (6) that connects the discharge valve and the liquid material reservoir in the vicinity of the liquid material reservoir or the liquid material reservoir in the flow path that communicates the nozzle side liquid material part and the reservoir part side liquid material part. Consisting of
The discharge valve communicates the liquid feed path (2) and the nozzle, and has a first position where the liquid feed path (6) and the nozzle-side liquid material part are blocked, and the liquid feed path (2) and the nozzle. blocked, configured by providing a second position which communicates the nozzle side liquid material portion Ekiokuro (6), a,
2. The liquid material discharge method according to claim 1 , wherein the switching valve is constituted by the discharge valve . The plunger includes a valve mechanism that brings the nozzle side liquid material part and the storage part side liquid material part into a communication state or a cutoff state,
After supplying the liquid material to the nozzle-side liquid material portion, the liquid feed path (2) and the nozzle are shut off by the discharge valve, and the valve mechanism is brought into a communication state, and then the liquid feed path by moving the plunger forward (2) The method for discharging a liquid material according to claim 2 or 3, further comprising a bubble removing step for removing bubbles in the liquid material. The liquid material storage part that stores the liquid material, the nozzle that discharges the liquid material, the liquid feed path (2) that connects the liquid material storage part and the nozzle, and the inner wall surface of the liquid feed path (2) Providing a plunger having a sliding wide seal portion (13), and a discharge valve for communicating or blocking the liquid feed path (2) and the nozzle,
The liquid material in the liquid feed path (2) is divided into the nozzle side liquid material part and the storage part side liquid material part by the seal part (13), and the plunger side liquid material part is rapidly advanced and stopped rapidly. A liquid material discharge method for applying an inertial force to the liquid material of the portion and discharging from the nozzle,
A flow path communicating the nozzle side liquid material part and the storage part side liquid material part and a switching valve for communicating or blocking the flow path are provided, and when discharging the liquid material, the discharge valve is in the communication state, the switching valve is Advance the plunger after shutting off,
When supplying the liquid material to the nozzle side liquid material part, the plunger is retracted after the discharge valve is shut off and the switching valve is in communication.
The plunger includes a valve mechanism that brings the nozzle side liquid material part and the storage part side liquid material part into a communication state or a shut-off state;
Forming a flow path for communicating the nozzle side liquid material part and the storage part side liquid material part by bringing the valve mechanism into a communicating state, and configuring the switching valve by the valve mechanism. To discharge liquid material. A first step that the liquid feed path and (2) to disconnect the nozzle, through communicating a flow path for communicating the nozzle side liquid material portion and the reservoir portion side liquid material portion by the switching valve by the discharge valve,
A second step of retreating the plunger and supplying the liquid material from the liquid material reservoir to the nozzle side liquid material portion;
The valve mechanism is in a communication state with the liquid feed path (2) and the nozzle blocked by the discharge valve, and the plunger is advanced to remove bubbles of the liquid material in the liquid feed path (2). Process,
And the cut-off state of the valve mechanism, the discharge valve and the liquid feed path and (2) a nozzle in communication with, the you block the flow path communicating the nozzle side liquid material portion and the reservoir portion side liquid material portion by the switching valve A fourth step;
6. The liquid material discharging method according to claim 4, further comprising a fifth step of discharging the liquid material by rapidly moving the plunger.   The liquid material discharge method according to claim 1, wherein the plunger is configured to penetrate the liquid material reservoir. The liquid material storage part that stores the liquid material, the nozzle that discharges the liquid material, the liquid feed path (2) that connects the liquid material storage part and the nozzle, and the inner wall surface of the liquid feed path (2) A plunger portion having a sliding wide seal portion (13), a plunger moving means for moving the plunger portion forward and backward, and a discharge valve for communicating or blocking the liquid feed path (2) and the nozzle,
The seal part (13) of the plunger part divides the liquid material in the liquid feed path (2) into the nozzle side liquid material part and the storage part side liquid material part, and the plunger part is rapidly advanced and rapidly stopped. A liquid material discharge device that applies an inertial force to the liquid material of the nozzle side liquid material portion and discharges it from the nozzle,
Providing a flow path communicating the nozzle side liquid material part and the storage part side liquid material part; and
An apparatus for discharging a liquid material, wherein a switching valve for communicating or blocking the flow path is fixed in the middle of the flow path. The flow path that connects the nozzle side liquid material part and the storage part side liquid material part includes the vicinity of the nozzle side end of the liquid feed path (2) and the vicinity of the liquid material storage part of the liquid feed path (2) or the liquid material storage part. And a liquid feed path (6) communicating with
9. The liquid material discharge device according to claim 8, wherein the switching valve is constituted by a liquid feed valve (7) that communicates or blocks the liquid feed path (6). The liquid passage (6) that connects the discharge valve and the liquid material reservoir in the vicinity of the liquid material reservoir or the liquid material reservoir in the flow path that communicates the nozzle side liquid material part and the reservoir part side liquid material part. Consisting of
The discharge valve communicates the liquid feed path (2) and the nozzle, and has a first position where the liquid feed path (6) and the nozzle-side liquid material part are blocked, and the liquid feed path (2) and the nozzle. blocked, configured by providing a second position which communicates the nozzle side liquid material portion Ekiokuro (6), a,
9. The liquid material discharge device according to claim 8, wherein the switching valve is constituted by the discharge valve .   The said plunger part is equipped with the valve mechanism which makes the said nozzle side liquid material part and the said storage part side liquid material part a communication state or interruption | blocking state, The discharge of the liquid material of Claim 8, 9 or 10 characterized by the above-mentioned. apparatus. The liquid material storage part that stores the liquid material, the nozzle that discharges the liquid material, the liquid feed path (2) that connects the liquid material storage part and the nozzle, and the inner wall surface of the liquid feed path (2) A plunger portion having a sliding wide seal portion (13), a plunger moving means for moving the plunger portion forward and backward, and a discharge valve for communicating or blocking the liquid feed path (2) and the nozzle,
The seal part (13) of the plunger part divides the liquid material in the liquid feed path (2) into the nozzle side liquid material part and the storage part side liquid material part, and the plunger part is rapidly advanced and rapidly stopped. A liquid material discharge device that applies an inertial force to the liquid material of the nozzle side liquid material portion and discharges it from the nozzle,
The plunger portion includes a valve mechanism that brings the nozzle side liquid material portion and the storage portion side liquid material portion into a communication state or a shut-off state. 13. The liquid material discharge device according to claim 8, wherein the plunger portion is configured to penetrate the liquid material storage portion.   14. The liquid material discharge device according to claim 8, wherein an inner diameter of the liquid feeding path (2) and an inner diameter of the discharge valve are substantially the same.

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