JPWO2008059909A1 - Method and apparatus for discharging liquid material - Google Patents

Abstract

Disclosed is a liquid material discharge method and apparatus capable of filling a liquid material into a flow path without residual gas or bubbles when the liquid material is filled at the start of use of the apparatus. The working shaft is inserted into the first flow path, which is a cylindrical hole communicating with the nozzle, the liquid material is injected from the second flow path communicating with the first flow path, the liquid material is filled into the first flow path, and the liquid material is discharged. In the discharge method, a space (4) connected to the first channel and the second channel is provided above the first channel, and the flow resistance of the liquid material flowing into the first channel from the second channel is set to the second channel. A liquid material discharge method and apparatus for preventing the remaining of bubbles by increasing the flow resistance of the liquid material flowing into the space (4).

Description

The present invention relates to a liquid material discharge method and apparatus for discharging a liquid material from a discharge port, and more specifically, the liquid material is filled without residual gas when the liquid material is filled into a flow path communicating with the discharge port. The present invention relates to a discharge method and apparatus.
In the present invention, “discharge” includes a discharge method in which the liquid material comes into contact with the work before being separated from the nozzle, and a discharge method in which the liquid material is brought into contact with the work after being separated from the nozzle. It is a waste.

As a device for discharging a liquid material, a shaft body that rotates or moves back and forth is disposed in a flow path from a supply port to which the liquid material is supplied to a discharge port to which the liquid material is discharged. A device that discharges a liquid material from a discharge port is known (for example, Patent Document 1).
In the device disclosed in FIG. 1 of Patent Document 1, the liquid material stored in the syringe is introduced into a flow path formed in the distribution device housing through the hole, and the liquid material is discharged from the nozzle by the advance movement of the shaft. It is what is done. Here, the shaft is inserted into the flow hole, and the flow path is formed by a gap between the shafts inserted into the flow holes. In addition, the shaft is configured so as not to leak toward the control mechanism that is the drive source of the shaft by the seal ring, and thus the liquid material stored in the syringe flows to the discharge port of the nozzle. It is configured so that all the paths are filled with liquid material.
It is known that the discharge device having such a configuration causes variations in the amount of liquid material discharged from the device when bubbles are present in the flow path.

  As an apparatus for removing bubbles in the flow path from the flow path, for example, there is one disclosed in Patent Document 2. In the apparatus described in Patent Document 2, a screw that rotates is arranged as a shaft body in a flow path from a supply port to which a liquid material is supplied to a discharge port from which the liquid material is discharged. The liquid material is discharged from the discharge port. A bubble removal hole is formed on the side surface of the cylinder. When a viscous liquid mixed with bubbles flows into the flow path in the cylinder, the bubbles are discharged from the bubble removal hole, and there is no bubble. The viscous fluid is configured to be pushed out from the nozzle.

JP 2004-322099 A JP-A-62-161671

  The bubbles remaining in the discharge device cause variations in the discharge amount and dripping of the liquid from the discharge port after discharge, so that it is necessary to remove and discharge reliably. However, air bubbles mixed in the liquid material in the flow channel in the discharge device often remain in corners formed in the flow channel, stepped portions where the flow channel diameter changes, and bag portions. Even if it is made to flow continuously, it is hard to be discharged as if it exists in the stagnation of the flow.

  In the apparatus disclosed in FIG. 1 of Patent Document 1, the position where the liquid material of the storage container is introduced into the flow path, that is, the flow path from the inlet to the seal ring, which is a connection point between the hole and the flow path, is configured. There is a problem that the air to be filled tends to remain when the liquid material is introduced at the start of use.

  In the device described in Patent Document 2, after the liquid material is filled in the device without bubbles, the bubbles mixed in the liquid material can be removed and discharged, but the bubbles mixed in when the liquid material is first filled are removed. Sometimes it could not be removed. Specifically, when liquid material is injected from a state where liquid material is not injected at the start of use, the liquid material reaches from the supply port to the discharge port without exhausting all of the air that fills the flow path of the device. Therefore, in order to discharge the gas / bubbles remaining in the flow path, it is necessary to discharge the liquid material from the discharge port for a certain period of time. Sometimes it remained in the channel.

  In view of the above-described problems, the present invention provides a liquid material discharge method and apparatus capable of filling a liquid material into a flow path without remaining gas or bubbles when filling the liquid material at the start of use of the apparatus. With the goal.

  In order to solve the above problems, the inventor fills the liquid material in order of distance from the liquid material supply port (in order of the flow path) from the liquid material supply port to which the liquid material is supplied to the discharge port. Invented a flow path having a novel configuration, which enables all of the gas filled in the flow path in the apparatus to be replaced with the liquid material when the liquid material is filled.

That is, according to the first aspect of the present invention, the working shaft is inserted into the first flow path communicating with the nozzle, the liquid material is injected from the second flow path communicating with the first flow path, and the liquid material is filled into the first flow path. In the discharge method for discharging material, a flow resistance of a liquid material flowing into the first flow path from the second flow path is provided by providing a space (4) connected to the first flow path and the second flow path in the extending direction of the work shaft. This is a liquid material discharge method that prevents bubbles from remaining by increasing the flow resistance compared to the flow resistance of the liquid material flowing into the space (4) from the second flow path.
A second invention is characterized in that, in the first invention, the space (4) is formed to have a wider diameter or a wider width than the first flow path.
According to a third invention, in the first or second invention, the terminal portion of the second flow path is configured so that the liquid material flows from the second flow path into the space (4) and the first flow path. Features.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the flow resistance is adjusted by providing a barrier member that blocks inflow from the second flow path to the first flow path at the end of the second flow path. It is characterized by. Here, the “barrier member” is not limited to a plate-like member, and may be a mesh member or a member that causes some flow resistance. Further, one or a plurality of “holes” may be provided in the plate-like “barrier member”, and the flow resistance may be adjusted by the number of holes or the size of the diameter.
According to a fifth invention, in the fourth invention, the barrier member has a height at which an upper end of the barrier member reaches the space (4).
According to a sixth invention, in the first or fifth invention, the flow resistance is adjusted by providing a notch portion (31) communicating with the second flow path and the space (4) at the terminal end of the second flow path. Features.
A seventh invention is characterized in that, in any one of the first to sixth inventions, a seal member having a hole through which a work shaft is inserted is formed in the space (4).
An eighth invention is characterized in that, in the seventh invention, the seal member is configured such that its side cross-section has an inverted concave shape.
According to a ninth aspect, in the seventh aspect, the seal member is configured such that a side cross-section thereof has an inverted V shape.

A tenth aspect of the invention includes a nozzle that discharges the liquid material, a first flow path that communicates with the nozzle, a second flow path that communicates with the first flow path and the liquid material supply source, and a hole through which the work shaft is inserted in the center. In a liquid material discharge device including a formed seal member, a work shaft inserted into the seal member and the first flow path, and a drive unit that operates the work shaft, the first flow path and the extending direction of the work shaft A space (4) connected to the second flow path is provided, and the flow resistance of the liquid material flowing from the second flow path to the space (4) is compared with the flow resistance of the liquid material flowing from the second flow path to the first flow path. This is a device characterized by providing a bubble residual prevention mechanism that is made smaller.
An eleventh invention is characterized in that, in the tenth invention, the space (4) is formed with a wider diameter or a wider width than the first flow path.
In a twelfth aspect according to the tenth or eleventh aspect, the terminal portion of the second flow path is configured so that the liquid material flows into the space (4) and the first flow path from the second flow path. Features.
A thirteenth invention is characterized in that, in any one of the tenth to twelfth inventions, a barrier member for blocking inflow from the second flow path to the first flow path is provided at the end of the second flow path. Here, the “barrier member” is synonymous with the “barrier member” in the fourth invention.
According to a fourteenth aspect, in the thirteenth aspect, the barrier member is provided at a terminal portion of the second flow path with a height at which an upper end of the barrier member reaches the space (4).
According to a fifteenth aspect, in the tenth or fourteenth aspect, a notch (31) that communicates the second flow path and the space (4) is provided at the end of the second flow path.
A sixteenth invention is characterized in that, in any one of the tenth to fifteenth inventions, the seal member is mounted in the space (4).
According to a seventeenth aspect, in the sixteenth aspect, the seal member is configured so that a side cross-section thereof has a reverse concave shape.
In an eighteenth aspect based on the sixteenth aspect, the seal member is configured so that a side cross-section thereof has an inverted V shape.
A nineteenth invention is characterized in that, in any one of the tenth to eighteenth inventions, after the working shaft is moved forward by the driving means, the working material is suddenly stopped and the liquid material is ejected and ejected from the ejection port.
In a twentieth aspect of the invention according to any one of the tenth to eighteenth aspects of the invention, the work shaft is configured as a screw having a spiral collar in the axial direction on the surface of the rod-like body, and the work shaft is rotated by driving means. The liquid material is discharged from the discharge port.

According to the present invention, when filling the liquid material at the start of use of the apparatus, the liquid material can be filled into the flow path without any remaining gas or bubbles. This makes it possible to stably and uniformly apply a desired amount.
Further, since the operation of discharging the liquid material from the discharge port for a certain period of time to discharge the gas and bubbles remaining in the flow path is minimized, the liquid material can be used effectively without waste.

It is a flow progress explanatory drawing of the liquid material with which the flow path by the structure of this invention is filled. It is explanatory sectional drawing which shows the modification of the flow path of the apparatus shown in FIG. FIG. 2 is an explanatory diagram of a flow of a liquid material filled in a flow path compared with FIG. 1. 1 is a schematic cross-sectional view of a discharge device according to Embodiment 1. FIG. It is a schematic sectional drawing of the flow-path block of the apparatus shown in FIG. It is a perspective view of the flow-path block of the apparatus shown in FIG. It is the schematic of the sealing member of the apparatus shown in FIG. 6 is a schematic cross-sectional view of a discharge device according to Embodiment 2. FIG. 6 is a schematic cross-sectional view of a discharge device according to Embodiment 3. FIG.

Explanation of symbols

The legend of the main symbols used in the drawings is shown below.
1 Work axis / 2 First flow path / 3 Seal member / 4 Seal space / 5 Second flow path / 6 Valve seat / 7 Nozzle / 8 Liquid material supply pipe / 9 Air pressure supply pipe / 10 Spring / 11 Micrometer / 12 Chamber / 13 O-ring / 14 Liquid material supply port / 15 Discharge port / 16 Channel block / 17 Connection block / 18 Air pressure block / 19 Air pressure supply hole / 20 Flange / 21 Body portion / 22 Tip portion / 23 Seal block / 24 Base plate / 25 Top plate / 26 Through hole / 27 Hole / 28 Wall / 30 Connection / 31 Notch / 32 Recess / 33 Nozzle connection / 34 Liquid material supply pipe connection / 35 Air pressure supply pipe B / 36 Ascent position adjustment member / 40 Seal member body / 41 Elastic body (spring) / 42 Hole / 50 Motor / 51 Work shaft connecting member

The best mode for carrying out the present invention will be described below with reference to FIGS. In the present specification, the passage of the liquid material from the liquid material supply port 14 to the discharge port 15 may be simply referred to as “flow path”.
When filling the liquid material, it is preferable that all of the gas filled in the flow path in the apparatus is replaced with the liquid material. For this purpose, the liquid material is supplied from the liquid material supply port to the discharge port. It is preferable that the liquid material is filled in the order of the distance from the liquid material supply port (order of the flow path).
In particular, in an apparatus having a configuration in which a work shaft is inserted into a flow path through which the liquid material flows and the liquid material is discharged by the operation of the work shaft, the discharge ports located at the upper end and the lower end of the flow path through which the work shaft is inserted It is preferable that the liquid material is filled in the order of the flow path in the space in the flow path leading to.

FIG. 1 discloses a configuration example in which a liquid material is supplied from an upper end of a flow path through which a work shaft is inserted, and a liquid material can be filled in an order of the flow path into a discharge port which is a lower end of the flow path. .
(A)-(h) of FIG. 1 is explanatory drawing which shows a mode until a liquid material is filled into the flow path in the apparatus based on this invention in eight steps.
FIG. 1 is a cross-sectional view for explaining a process in which a liquid material is supplied from the second flow path 5 to the first flow path 2. As shown in FIG. 1, a work shaft 1 having a cylindrical body shaft is inserted through a first flow path 2 that is a cylindrical space. At the connection portion between the first flow path 2 and the second flow path 5, a circumferential seal space 4 that communicates with the first flow path 2 and is formed larger in diameter than the inner diameter of the first flow path 2, and the seal space 4 The first flow path 2 and the second flow path 5 are configured to communicate with each other via a seal space 4.

(A) is a state before liquid material is inject | poured.
As shown in (b), when the supply of the liquid material is started, first, the second flow path 5 is filled with the liquid material.
As shown in (c), the liquid material flowing out from the second flow path 5 first flows into the seal space 4.
As shown in (d), when the liquid material is further supplied, the air in the space of the seal space 4 is further discharged and filled with the liquid material instead. Liquid material flows in through.
As shown in (e), the liquid material flowing into the first flow path 2 flows through the gap between the work shaft 1 and the inner wall of the first flow path 2, but the flow of the seal space 4 as compared with the flow resistance flowing through this gap. Due to the low resistance, the liquid material is preferentially supplied to the space of the sealing space 4.
As shown in (f), when the space of the seal space 4 is filled with the liquid material, the same amount of liquid material as that supplied thereafter is supplied to the first flow path 2, and (g), (h) ) State.
As described above, the most advanced surface in the first flow path 2 of the liquid material has a circumferential shape that obliquely crosses the first flow path 2 as shown in (d) to (g) at an early stage. As the liquid material travels down the first flow path 2, it becomes perpendicular to the traveling direction as shown in (h).

  As described above, according to the configuration illustrated in FIG. 1, the liquid material is injected from the seal space 4 which is a space provided further above the first flow path 2 through which the work shaft 1 is inserted. The gas can be efficiently replaced with a liquid material. In other words, the step of filling the seal space 4 with the liquid material is performed while the gas remaining in the seal space 4 and the nozzle 7 communicate the gas with the medium.

Further, under the same technical idea, as shown in FIG. 2, the first flow path 2 and the second flow path 5 may be communicated without using the seal space 4. The liquid material is preferentially supplied to the space of the seal space 4 because the flow resistance of the seal space 4 is lower than the flow resistance flowing through the gap between the work shaft 1 and the inner wall of the first flow path 2. This is the same as in FIG.
On the other hand, in the configuration in which the second flow path 5 and the seal space 4 are not communicated as shown in FIG. 3, the liquid material is not filled in the order of the distance from the liquid material supply port (the order of the flow path). As shown in FIG. 3, there is a risk that gas (bubbles) remains in the seal space 4. That is, in order to fill the liquid in the order of the flow paths without bubbles remaining, the second flow path and the seal space 4 communicate with each other, and the gap between the working shaft 1 and the inner wall of the first flow path 2 flows. It is a necessary condition that the flow resistance of the seal space 4 is lower than the flow resistance. In addition, the 2nd flow path 5 does not need to be comprised horizontally, and may be comprised diagonally.

  By the way, in the conventional apparatus as disclosed in Patent Document 1 and Patent Document 2, the flow path (first flow path) through which the work shaft is inserted and the flow path (second flow path) communicating with the non-end portion of the side surface thereof. In general, the liquid material is supplied. However, when the flow path is configured in this way, the first flow path provided in the vertical direction and the second flow path provided in the horizontal or oblique direction are connected to the seal member side (upper side) from the connecting portion. There was a problem that gas remained easily. That is, since the liquid material supplied from the second flow path flows from the connection portion of the first flow path toward the discharge port, the seal member side becomes a stagnation of flow from the connection portion. When filling the device with liquid material at the start of use of the device, the flow of liquid material on the seal member side is less when the gas remains on the seal member side than when the gas remains on the discharge port side. The residual gas was not discharged, and it was difficult to completely remove the residual gas.

In this way, the situation where the gas remains on the seal member side is the state where the gas remains on the seal member side when the liquid material is filled at the start of use of the apparatus (that is, the liquid material is completely on the seal member side of the flow path). This is likely to occur when the radial region on the discharge port side of the first flow path is filled with the liquid material (see (f) of FIG. 3).
In a state where the spatial communication with the discharge port is blocked, the seal member is located in the flow stagnation with respect to the flow of the liquid material from the connecting portion 30 of the first flow path 1 and the second flow path 5 to the discharge port 15. The gas on the side remains in the first flow path 2. (The same applies to the case where a seal space 4 that does not communicate with the second flow path 5 is provided as shown in FIG. 3).
Therefore, in order to fill the liquid material without leaving the gas in the flow path, the gas in the first flow path 2 on the seal member side is kept in a state of being in spatial communication with the discharge port, It is necessary to fill the area with the liquid material in order to fill the liquid material without leaving any gas in the flow path.

If the flow path is configured as in the present invention, the radial region on the discharge port side of the first flow path is not filled with the liquid material before the seal member is filled with the liquid material without any remaining gas. . That is, since the liquid material is preferentially supplied to the seal space 4 as compared with the first flow path 2, while discharging bubbles from the liquid material supply port 14 to the discharge port 15, from upstream to downstream. The liquid material can be sequentially filled.
In addition, if the flow path is configured as in the present invention, the liquid material continues to be supplied to the seal space 4 even after the liquid material is filled in the flow path. However, by further injecting the liquid material, the bubbles can be easily discharged to the outside from the discharge port.

  Hereinafter, the details of the present invention will be described with reference to examples, but the present invention is not limited to these examples.

  The apparatus of the present embodiment disclosed in FIG. 4 relates to a discharge apparatus of a type that discharges a liquid material from a nozzle 7. More specifically, the apparatus according to the present embodiment is a liquid material discharge device of a type that discharges and discharges liquid material from the tip of the nozzle 7 by a high-speed movement operation in the axial direction of the work shaft and a subsequent rapid stop operation. .

"Construction"
The apparatus of this embodiment includes a flow path block 16 in which the nozzle 7 is inserted, a connection block 17 connected to the flow path block 16 and the pneumatic block 18, and a pneumatic pressure that serves as a drive source for operating the work shaft 1. The main components are the block 18 and the work shaft 1 that reciprocates in the space provided inside each block.
The work shaft 1 is composed of a rod-like body portion 21 and a flange 20 fixedly contacted with the rear end of the body portion 21. The work shaft 1 is arranged to extend between the blocks. More specifically, the flange 20 is arranged so as to slide in close contact with the inner wall surface of the chamber 12 in which the pneumatic block 18 is formed, and the body portion 21 is provided with a hole 27 provided on the lower surface of the pneumatic block 18 and a connecting block. 17 is inserted through the flow path block 16.

The pneumatic block 18 is a hollow cylinder in which the chamber 12 is provided. The micrometer 11 is inserted on the upper surface of the pneumatic block 18, and a rod-like body constituting the lower end of the micrometer is inserted into the chamber 12, and the spring 10 is disposed so as to surround it. The upper surface of the flange 20 is in contact with the lower end of the spring 10. That is, in a state where no air pressure is supplied to the lower space of the chamber 12, the spring 10 presses the flange 20 and acts to seat the front end of the trunk portion 21 on the valve seat 6.
An air pressure supply hole 19 is provided in a side surface of the lower space of the chamber 12 and communicates with an air pressure supply pipe 9 that supplies air pressure. When air pressure is supplied from the air pressure supply pipe 9, a force acts to raise the lower surface of the flange 20, and the work shaft 1 is moved upward to compress the spring 10. Here, the hole 27 provided in the lower surface of the pneumatic block 18 is sealed by an O-ring 13 attached thereto, and the side surface of the flange 20 is configured to be in close contact with the inner wall surface of the chamber 12. Therefore, the air pressure supplied from the air pressure supply pipe 9 does not leak out from the lower space of the chamber 12.

The flow path block 16 has the first flow path 2 and the second flow path 5 therein.
The first flow path 2 is a space provided in the flow path block 16 in the vertical direction, the upper end thereof communicates with the seal space 4, and the nozzle 7 is inserted into the lower end thereof. The body portion 21 of the work shaft 1 is inserted into the first flow path 2 through the through hole 26 in the connection block 17. The through hole 26 is sealed by the seal member 3.
The second flow path 5 is a space provided in the horizontal direction in the flow path block 16, one end of which communicates with the side surface of the first flow path 2, and the other end forms a liquid material supply port 14. The liquid material supply port 14 is a hole provided in the side surface of the flow path block 16 and communicates with the liquid material supply pipe 8. A liquid material adjusted to a desired pressure is supplied from the liquid material supply pipe 8 to the second flow path 5.

Details of the flow path formed in the flow path block 16 will be described with reference to FIGS. 5 and 6.
The upper end of the first flow path 2 is connected to a seal space 4 that has a larger diameter than the first flow path 2. The seal member 3 is disposed in the seal space 4 to prevent the liquid material from entering the through hole 26 of the connecting block 17.
The liquid material supply port 14 that constitutes one end of the second flow path 5 is provided in a liquid material supply pipe connection portion 34 that is a recess formed in the side surface of the flow path block 16. The liquid material supply pipe 8 is connected to the liquid material supply pipe connecting portion 34 by a joint or the like. Further, the other end of the second flow path 5 is connected to the first flow path 2 by the connecting portion 30. The connection part 30 has an upper surface cut away, and constitutes a cutout part 31 that becomes a flow path communicating with the second flow path 5 and the seal space 4.

The seal member 3 will be described in detail with reference to FIG.
In FIG. 7, (a) is the upper surface of the sealing member 3, (b) is the bottom surface, (c) is the side surface, and (d) is the cross section of the side surface. The seal member 3 includes a seal member main body 40 and an elastic body 41.
The seal member 3 has a hole 42 through which the work shaft 1 is inserted. Further, the seal member main body 40 is an annular body that forms a concave portion having a U-shaped cross section. The elastic body 41 is inserted into the recess so as to spread the seal member main body 40, thereby ensuring the close contact with the work shaft 1 inserted through the hole 42 and the close contact with the wall surface of the seal space 4. Yes.

≪Introduction of liquid material≫
When air is supplied from the air supply pipe 9 into the space below the chamber 12, the flange 20 rises so as to contract the spring 10 due to the action of air pressure, and the flange 20 comes into contact with the lower end of the micrometer 11 to stop the rise. .
When the flange 20 is raised, the tip of the body portion 21 is separated from the valve seat 6. At this time, the liquid material supply port 14 to which the liquid material is supplied and the discharge port 15 at the tip of the nozzle 7 communicate with each other using gas as a medium. When the liquid material is supplied from the liquid material supply pipe 8 in a state where the tip of the body portion 21 is separated from the valve seat 6, the supplied liquid material flows into the second flow path 5 and passes through the connecting portion 30. It flows into the seal space 4 and the first flow path 2.

Since the second flow path 5 is provided with a notch 31 on the upper surface of the connection portion with the first flow path 2, the second flow path 5 directly communicates with the seal space 4. Therefore, the gas in the flow channel pushed away by the injected liquid material can escape from the notch 31, and the liquid material is filled in the seal space 4 and the first flow channel 2 without any residual gas, and the nozzle 7 The liquid material is discharged from the discharge port 15 at the tip. In principle, no gas remains, but from the viewpoint of quality safety, it is assumed that some liquid material is discharged in actual operation. However, it is sufficient to discharge a significantly smaller amount of liquid material compared to the case where the liquid material is discharged for a certain period of time as in the conventional apparatus.
After confirming that the liquid material has been discharged from the discharge port 15, the flange 20 of the work shaft 1 is removed by the elastic force of the spring 10 by discharging the air pressure in the lower space of the chamber 12 through the air pressure supply pipe 9. The liquid material is moved downward and the tip of the body portion 21 is seated on the valve seat 6 to shut off the flow path, thereby completing the liquid material filling operation. In a state where the tip of the body portion 21 and the valve seat 6 are seated, the liquid material in the first flow path 2 does not leak from the discharge port 15 at the tip of the nozzle 7.

The discharge operation is started after the liquid material is filled in the flow path without any remaining gas.
The discharge operation is performed by supplying and discharging air pressure from the air pressure supply pipe 9 to the space below the chamber 12. That is, by supplying air pressure to the lower space of the chamber 12 and moving the flange 20 upward, the tip of the body portion 21 is separated from the valve seat 6 to supply the liquid material to the nozzle 7. By releasing the pressure compressed in the space all at once, the flange 20 is moved downward by energizing the elastic deformation of the spring 10, and the front end of the body portion 21 is brought into contact with the valve seat 6. 7 The liquid material is ejected from the discharge port 15 at the tip.

The apparatus of the present embodiment is an example applied to a valve for discharging a liquid material.
The apparatus of the present embodiment shown in FIG. 8 discharges the liquid material adjusted to a desired pressure introduced into the valve from the nozzle 7 with the work shaft 1 and the valve seat 6 separated from each other. 1 is a type of discharge device that stops discharge from a nozzle 7 by seating 1 and a valve seat 6.

"Construction"
The apparatus of the present embodiment is configured to directly connect the pneumatic block 18 and the flow path block 16 without using the connection block 17.
A work shaft 1 having a body 21 that is a rod-like body and a flange 20 formed at the rear end of the body 21 is configured to extend between the blocks.
The flange 20 of the work shaft 1 is disposed so as to closely slide with the inner wall surface of the chamber 12 formed at the center of the pneumatic block 18, and the body portion 21 of the work shaft 1 passes through the hole 27 of the pneumatic block 18. Thus, the first flow path 2 of the flow path block 16 is inserted.

The pneumatic block 18 is a hollow cylinder in which a chamber 12 is provided, and the chamber 12 is divided into an upper space and a lower space by a flange 20.
The upper space of the chamber 12 communicates with the air pressure supply pipe B35, and the lower space of the chamber 12 communicates with the air pressure supply pipe 9.
When the air pressure is supplied from the air pressure supply pipe 9 and the air pressure is discharged from the air pressure supply pipe B35, the pressure acts on the lower surface of the flange 20 to move the work shaft 1 upward.
When air pressure is supplied from the air pressure supply pipe B35 and air pressure is discharged from the air pressure supply pipe 9, pressure acts on the upper surface of the flange 20 to move the work shaft 1 downward.
The body portion 21 of the work shaft 1 is sealed by an O-ring 13 mounted in the hole 27 of the pneumatic block 18, and the side surface of the flange 20 is configured to slide in close contact with the inner wall surface of the chamber 12. The pressure does not leak out from each space of the chamber 12 to the outside.

The flow path block 16 has the first flow path 2 and the second flow path 5 therein.
The first flow path 2 is a space provided in the vertical direction in the flow path block 16, and the upper end thereof communicates with the seal space 4, and the nozzle 7 is inserted into the lower end thereof. The body portion 21 of the work shaft 1 is inserted into the first flow path 2 through the through hole 26 in the connection block 17.
The seal space 4 is formed with a larger diameter than the first flow path 2. The seal member 3 is disposed in the seal space 4 to prevent the liquid material from entering the hole 27 of the pneumatic block 18.

The second flow path 5 is a space provided in the horizontal direction in the flow path block 16, one end of which communicates with the side surface of the first flow path 2, and the other end forms a liquid material supply port 14.
The liquid material supply port 14 that constitutes one end of the second flow path 5 is provided in a liquid material supply pipe connection portion 34 that is a recess provided in a side surface of the flow path block 16. The liquid material supply pipe connecting portion 34 is connected to the liquid material supply pipe 8 by a joint or the like. Further, the other end of the second flow path 5 is connected to the first flow path 2 by the connecting portion 30. The connection part 30 is cut off at the upper surface, and a cutout part 31 is formed as a flow path communicating with the second flow path 5 and the seal space 4. Although the configuration is the same as that of the first embodiment, the cutout portion 31 is larger than that of the first embodiment and the upper surface is cut off. Therefore, the liquid material is filled into the seal space 4 more smoothly and more quickly than the first embodiment. be able to.

  In addition, the seal member 3 is configured to be inserted so as to expand the seal member main body 40 and the seal member main body 40 that is an annular body that forms a concave portion having a U-shaped cross section and the concave portion. Is the same as that of the first embodiment, but is different in that the shape of the elastic body 41 is formed in an annular shape. The point that the elastic body 41 acts to ensure the close contact with the work shaft 1 inserted through the hole 42 and the close contact with the wall surface of the seal space 4 is the same as in the first embodiment.

≪Introduction of liquid material≫
When air is supplied from the air supply pipe 9 to the lower space of the chamber 12 and the air in the upper space of the chamber 12 is discharged from the air supply pipe B <b> 35, the flange 20 rises due to the action of the air pressure. Abutting stops the ascent.
When the flange 20 is raised, the tip of the body portion 21 of the work shaft 1 is separated from the valve seat 6. At this time, the liquid material supply port 14 to which the liquid material is supplied and the discharge port 15 at the tip of the nozzle 7 communicate with each other using gas as a medium. When the liquid material is supplied from the liquid material supply pipe 8 in a state where the tip of the body portion 21 of the work shaft 1 is separated from the valve seat 6, the supplied liquid material flows into the second flow path 5, and the connecting portion 30. Then, the gas flows into the seal space 4 and the first flow path 2.
Since the second flow path 5 is provided with a notch 31 on the upper surface of the connection portion with the first flow path 2, the second flow path 5 directly communicates with the seal space 4. Therefore, the gas in the flow channel pushed away by the injected liquid material can escape from the notch 31, and the liquid material is filled in the seal space 4 and the first flow channel 2 without any residual gas, and the nozzle 7 The liquid material is discharged from the discharge port 15 at the tip.

  Compared with the cutout portion 31 of the first embodiment, the present embodiment, which is largely cut off, allows the liquid material to be introduced into the seal space 4 more smoothly and more quickly than the first embodiment. High residual prevention effect.

  After confirming that the liquid material is discharged from the discharge port 15, the air pressure in the lower space of the chamber 12 is discharged through the air pressure supply pipe 9, and the air is supplied from the air pressure supply pipe B 35 to the upper space of the chamber 12. By supplying, the flange 20 of the working shaft 1 is moved downward, and the tip of the body portion 21 is seated with the valve seat 6 to shut off the flow path, thereby completing the liquid material filling operation. In a state where the tip of the body portion 21 and the valve seat 6 are seated, the liquid material of the first flow path 2 does not leak from the discharge port 15 at the tip of the nozzle 7.

In the discharge operation, the pressure-adjusted liquid material is pressurized and supplied to a valve in which the liquid material is filled in the flow path without remaining gas, and the valve shaft 6 is separated from the valve seat 6 by reciprocating the work shaft. By opening and closing.
The discharge amount of the liquid material is adjusted by the opening degree of the ascending position adjusting member 36, the separation time between the valve seat 6 and the work shaft 1, and the like.

  The apparatus of the present embodiment disclosed in FIG. 9 relates to a discharge apparatus apparatus of a type that discharges a liquid material from a nozzle 7 by rotating a work shaft 1 having a spiral collar at the tip.

"Construction"
The apparatus of the present embodiment includes a base plate 24, a top plate 25 disposed on the top, a motor 50 disposed on the top, a seal block 23 disposed on the center of the base plate 24, The flow path block 17 disposed at the lower end of the base plate 24 so as to be connected to the seal block 23 and the work shaft 1 that rotates in a space provided inside each block are the main components.
The work shaft 1 includes a trunk portion 21 and a tip portion 22 having a spiral collar in the extending direction of the trunk portion 21, and is disposed so as to extend through the seal block 23 to the flow path block 16. . A rotation shaft of a motor 50 inserted in a through hole formed in the top plate 25 is connected to the body portion 21 via a work shaft connecting member 51, and the work shaft 1 rotates in the extending direction by driving the motor 50. Is rotated.

  The seal space 4 is a recess formed in the lower surface of the seal block 23 and has a through hole in the center. The seal space 4 is formed with a larger diameter than the diameter of the first flow path 2 formed in the flow path block 16 and communicates with the second flow path 5 and the first flow path 2.

The seal member 3 is disposed in the seal space 4 to prevent the liquid material from entering the seal block 23.
The seal member 3 is configured to be able to rotate and slide with the work shaft 1. More specifically, the seal member 3 is an annular member whose side cross section is formed in an inverted V shape, one end of the V shape is in contact with the work shaft 1, and the other end is in close contact with the inner wall surface of the seal space 4. And seal.
The seal member 3 may be formed in an inverted concave shape, or an inverted V shape may be used for an apparatus in which the work shaft 1 reciprocates.

The flow path block 16 has an upper surface fixed to be connected to the seal block 23 and has a nozzle 7 for discharging a liquid material on the lower surface. Further, a liquid material supply port 14 connected to the liquid material supply pipe 8 is provided on the side surface.
The flow path block 16 has a first flow path 2 and a second flow path 5 to which a liquid material is supplied in the center through which the work shaft 1 is inserted.
The first flow path 2 is a space formed in the vertical direction at the center of the flow path block 16 and has an upper end communicating with the seal space 4 and a lower end communicating with the discharge port 15 of the nozzle 7.
The second flow path 5 is a space formed horizontally from the side surface of the flow path block 16 toward the center, and is configured such that the upper part of one end thereof communicates with the seal space 4 and the other end is supplied with a liquid material. The mouth 14 is configured.

In the present embodiment, since the direct communication with the first flow path is blocked by the wall 28 that is a barrier member provided at the end portion of the second flow path 5, as in the first and second embodiments, The first channel and the second channel do not communicate directly. In the present embodiment, as in FIG. 1, the first flow path 2 and the second flow path 5 are configured to communicate with each other only through the seal space 4, but by adjusting the height of the wall 28, The flow resistance of the liquid material flowing from the second channel into the first channel and the seal space 4 may be adjusted.
In the devices of Examples 1 and 2, there is no problem in configuring the flow path provided with the wall 28.

≪Introduction of liquid material≫
The liquid material supplied from the liquid material supply pipe 9 is injected from the liquid material supply port 14 into the second flow path 5, supplied to the first flow path 2 through the seal space 4, and discharged from the discharge port 15. At this time, by operating the motor 50 to rotate the work shaft 1, the liquid material can be smoothly flowed into the first flow path 2.
After confirming that the liquid material has been discharged from the discharge port 15, the supply of the liquid material from the liquid material supply pipe 9 is stopped, or the rotation operation of the work shaft 1 is stopped, so that the flow path of the liquid material Complete the filling.

  Unlike the apparatus of Examples 1 and 2 in which the second flow path 5 directly communicates with the first flow path 2, the apparatus of the present embodiment is different from the first flow path 2 only through the seal space 4. Communicate. Therefore, compared with the apparatus of Example 1 and 2, the gas residue of the seal space 4 can be prevented more reliably.

  The discharge operation is performed from a state in which the second channel 5 and the first channel 2 are filled with the liquid material without any remaining gas. The discharge operation is performed by supplying the liquid material from the liquid material supply pipe 9 and rotating the work shaft 1.

Claims (20)

In the discharge method of inserting the working shaft into the first flow path communicating with the nozzle, injecting the liquid material from the second flow path communicating with the first flow path, filling the liquid material into the first flow path and discharging the liquid material,
A space (4) connected to the first flow path and the second flow path is provided in the extending direction of the work shaft, and the flow resistance of the liquid material flowing into the first flow path from the second flow path is reduced from the second flow path to the space ( 4) A method for discharging a liquid material, wherein bubbles are prevented from remaining by increasing the flow resistance of the liquid material flowing into 4).   The method for discharging a liquid material according to claim 1, wherein the space (4) has a wider diameter or a wider width than the first flow path.   3. The liquid material discharge method according to claim 1, wherein the end portion of the second flow path is configured so that the liquid material flows from the second flow path into the space (4) and the first flow path. .   4. The discharge of a liquid material according to any one of claims 1 to 3, wherein a flow resistance is adjusted by providing a barrier member that blocks inflow from the second flow path to the first flow path at an end portion of the second flow path. Method.   The method of discharging a liquid material according to claim 4, wherein the barrier member has a height at which an upper end of the barrier member reaches the space (4).   6. The method for discharging a liquid material according to claim 1, wherein a flow resistance is adjusted by providing a notch (31) communicating with the second channel and the space (4) at the terminal end of the second channel. .   The method for discharging a liquid material according to any one of claims 1 to 6, wherein a seal member having a hole through which a work shaft is inserted at a center is mounted in the space (4).   8. The method of discharging a liquid material according to claim 7, wherein the side surface cross-section of the seal member is formed in a reverse concave shape.   8. The method for discharging a liquid material according to claim 7, wherein the side surface cross-section of the seal member is an inverted V shape. A nozzle that discharges the liquid material; a first flow path that communicates with the nozzle; a second flow path that communicates with the first flow path and the liquid material supply source; and a seal member that has a hole through which a work shaft is inserted in the center. In the liquid material discharge apparatus comprising the work shaft inserted into the seal member and the first flow path, and the drive means for operating the work shaft,
A space (4) connected to the first flow path and the second flow path is provided in the extending direction of the work shaft, and the space (from the second flow path is compared with the flow resistance of the liquid material flowing into the first flow path from the second flow path ( 4) A device provided with a bubble residual prevention mechanism that reduces the flow resistance of the liquid material flowing into 4).   11. The liquid material ejection device according to claim 10, wherein the space (4) is formed to have a wider diameter or a wider width than the first flow path.   12. The liquid material ejection device according to claim 10, wherein the end portion of the second flow path is configured so that the liquid material flows from the second flow path into the space (4) and the first flow path. .   13. The liquid material discharge device according to claim 10, wherein a barrier member that blocks inflow from the second flow path to the first flow path is provided at an end portion of the second flow path.   14. The liquid material ejection device according to claim 13, wherein the barrier member has a height at which an upper end of the barrier member reaches the space (4) and is provided at an end portion of the second flow path.   The liquid material ejection device according to claim 10 or 14, wherein a notch (31) communicating the second flow path and the space (4) is provided at an end portion of the second flow path.   16. The liquid material ejection device according to claim 10, wherein the seal member is mounted in the space (4).   The liquid material ejection device according to claim 16, wherein the seal member is configured such that a side cross-section thereof has an inverted concave shape.   The liquid material ejection device according to claim 16, wherein the seal member is configured to have an inverted V-shaped side surface cross section.   19. The liquid material discharge apparatus according to claim 10, wherein after the working shaft is moved forward by the driving means, the work material is suddenly stopped and the liquid material is ejected from the discharge port.   11. The working shaft is configured as a screw having a spiral collar in the axial direction on the surface of a rod-like body, and the working shaft is rotated by a driving means to discharge the liquid material from the discharge port. The liquid material discharge device according to any one of 18 to 18.