JP4743872B2 - Liquid material discharge device - Google Patents

Description

  The present invention relates to a liquid material discharge apparatus for discharging a small amount of liquid material.

  The liquid material discharge device is a device for discharging a liquid material, such as an adhesive, a sealant, and a coating agent, stored in a container called a thin-rigid, from a nozzle. This liquid material discharge device is generally called a dispenser and has been conventionally used in various fields. For example, in the electronics field, when an electronic component is mounted on a mount such as a wiring board or a semiconductor device, a resin for bonding the electronic component and the mount is used as the electronic component or the mount. When applying, a liquid material discharge device is used.

  In recent years, there has been a demand for downsizing and high integration of electronic components in the electronics field. Along with this, there is a technology for discharging a small amount of liquid material with high accuracy and stability using a liquid material discharge device. It has been demanded. In order to meet the demand for downsizing and high integration of electronic parts, it is ideal that the liquid material is maintained in a certain shape without flowing and spreading from a desired position after being applied. From this viewpoint, the viscosity of the liquid material is preferably high. However, if the viscosity of the liquid material is high when discharged from the liquid material discharge device, it becomes difficult to discharge a small amount of liquid material with high accuracy and at high speed. Therefore, it is preferable that the viscosity of the liquid material when discharged from the liquid material discharge device is low. In order to satisfy these requirements, it is desirable that the liquid material has a high thixotropy in addition to a high viscosity in a stopped state or a flow state close to stopping. That is, when the liquid material is discharged from the liquid material discharge device, it flows in the vicinity of the nozzle. Therefore, if the liquid material has high thixotropy, the viscosity of the liquid material is reduced when discharged from the liquid material discharge device. This is because it becomes lower and becomes higher after being applied.

  Conventionally, as a liquid material discharge device, an air pulse type device is often used. In the air pulse type liquid material discharge device, a nozzle is provided at one end of the syringe, and a compressed air supply unit is provided at the other end. In this liquid material discharge apparatus, a predetermined amount of liquid material is discharged from a nozzle by supplying compressed air from the supply unit into the syringe for a predetermined time. The air pulse type liquid material discharge device has an advantage that the structure is simple, but has the following problems. That is, in the air pulse type liquid material discharge device, as the liquid material in the syringe is discharged, the liquid material decreases in the syringe and the volume of compressed air that functions as an air cushion increases. Therefore, this liquid material discharge device has a problem that the discharge amount per discharge changes with the change in volume of the compressed air functioning as an air cushion. Further, in the air pulse type liquid material discharge device, as described above, the compressed air in the syringe functions as an air cushion, so that the responsiveness is inferior, and the liquid material is discharged from the nozzle at a time other than the discharge operation. There is a problem that the accuracy of discharge is inferior because it may protrude.

  In order to solve the problems of the above-described air pulse type liquid material ejection device, for example, as described in Patent Documents 1 to 3, switching between supply and shutoff of the liquid material stored in the syringe to the nozzle is performed. A liquid material discharge device provided with a valve has been proposed. This liquid material discharge device is generally configured as follows. First, the liquid material discharge device includes a shaft-like member that is inserted into a syringe and reciprocates. In the syringe, a valve seat (valve seat) is provided at the inlet of the nozzle. The tip portion of the shaft-like member is selected from a state in which the shaft-like member abuts on the valve seat as a result of the reciprocating motion of the shaft-like member and a state separated from the valve seat. A valve is constituted by the tip portion of the shaft-like member and the valve seat. In the syringe, a constant pressure equal to or higher than atmospheric pressure is applied to a space formed on the opposite side of the nozzle from the liquid surface. This liquid material discharge device selectively discharges the liquid material stored in the syringe from the nozzle when the distal end portion of the shaft-shaped member is separated from the valve seat.

No. 5-9099 Japanese Patent Publication No. 5-42304 Japanese Patent Laid-Open No. 11-197571

  According to the liquid material discharge apparatus provided with the valve as described above, high-precision discharge is possible as compared with the air pulse type liquid material discharge apparatus. However, this liquid material discharge device has the following problems. First, in this liquid material discharge apparatus, the shaft-like member inserted into the syringe is in contact with the liquid material stored in the syringe. Therefore, the shaft-like member receives fluid resistance due to the liquid material when reciprocating. For this reason, in the liquid material discharge device provided with the valve, there is a problem that it is difficult to speed up the reciprocating motion of the shaft-like member and to improve the accuracy of liquid material discharge. This problem becomes more prominent as the viscosity of the liquid is higher.

  Further, the liquid material discharge device provided with a valve has the following problems, particularly when a liquid material having high viscosity and thixotropy is used. This problem will be described in detail with reference to FIG. 12 and FIG.

  12 and 13 show the vicinity of a nozzle in an example of a liquid material discharge apparatus provided with a valve. 12 and 13 includes a syringe 210, a nozzle member 220 attached to the distal end portion of the syringe 210, and a shaft-like member 230 inserted into the syringe 210. The nozzle member 220 includes a cylindrical connection portion 221 connected to the distal end portion of the syringe 210 and a nozzle 222 provided on the distal end side of the connection portion 221. The nozzle 222 has a discharge side end portion 222a for discharging a liquid material and an inlet side end portion 222b on the opposite side. The nozzle member 220 further includes a valve seat 223 disposed at a position adjacent to the inlet side end portion 222 b of the nozzle 222. The tip of the shaft-shaped member 230 has a conical shape. The tip portion is selected from a state in which the shaft-like member 230 abuts on the valve seat 223 by reciprocating movement and a state in which the tip portion is separated from the valve seat 223. A liquid 240 is stored in the syringe 210.

  FIG. 12 schematically shows the state of the liquid material 240 when the shaft-like member 230 reciprocates. The arrows in the figure represent the direction and speed in which the liquid 240 flows. As shown in FIG. 12, when the shaft-shaped member 230 reciprocates, the liquid material 240 is sheared by the shaft-shaped member 230. Therefore, when the liquid material 240 has thixotropy, when the shaft-shaped member 230 reciprocates, the viscosity of the portion of the liquid material 240 in the vicinity of the shaft-shaped member 230 is greatly reduced. The viscosity of the portion far from the member 230 does not change much. Therefore, only the portion in the vicinity of the shaft-shaped member 230 of the liquid 240 is likely to flow, and this portion is selectively supplied to the nozzle 222 and discharged. As a result, as shown in FIG. 13, a gap 250 is generated between the outer peripheral surface of the shaft-like member 230 and the liquid material 240. At this time, since the viscosity of the part far from the shaft-shaped member 230 remains high in the liquid 240, the gap 250 is difficult to be filled with the liquid 240. In this way, the liquid material 240 having a high viscosity remains in the vicinity of the inner peripheral surface of the syringe 210, and the liquid material 240 may not be discharged while the liquid material 240 remains in the syringe 210. In this case, only a part of the liquid material 240 in the syringe 210 is used, which is uneconomical. This problem becomes more prominent as the inner diameter of the syringe 210 is larger.

  Further, in this liquid material discharge device, since the viscosity of the liquid material 240 becomes uneven in the syringe 210 as described above, it is difficult to discharge the liquid material 240 stably and accurately. There is.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a liquid material discharge device capable of stably discharging a small amount of liquid material with high accuracy.

The liquid material discharge device of the present invention includes a cylindrical container that stores a liquid material, a shaft-shaped member that is inserted into the cylindrical container, and a drive device that reciprocates the shaft-shaped member in the axial direction. The cylindrical container is provided at one end in the axial direction of the cylindrical container, and has a discharge side end for discharging the liquid substance and an inlet side end on the opposite side, and an axial direction in the cylindrical container One of the valves arranged at a position adjacent to the opening provided at the other end of the nozzle and the inlet side end of the nozzle, for switching the supply of the liquid substance stored in the cylindrical container to the nozzle and the shutoff. The valve seat which comprises a part is included. The shaft-like member is provided at one end of the shaft-like member in the axial direction, and a state in which the shaft-like member abuts on the valve seat by reciprocating movement and a state separated from the valve seat are selected. A valve component constituting the valve is included. And the liquid substance discharge apparatus of this invention selectively discharges the liquid substance stored by the cylindrical container from the discharge side edge part of a nozzle, when a valve structure part diverges from a valve seat. The liquid material discharge device of the present invention is further arranged around the shaft-shaped member so as not to be interlocked with the shaft-shaped member in the cylindrical container, and the valve component is in contact with the valve seat. In any of the states separated from the valve seat , a sheath member that separates the liquid material stored in the cylindrical container from at least a part of the outer peripheral surface of the shaft member, and an end portion on the opening side of the sheath member And a fixing member fixed to the cylindrical container so as to close the opening .

  In the liquid material discharge device of the present invention, the liquid material stored in the cylindrical container by the sheath member in either the state where the valve component is in contact with the valve seat or the state where the valve component is separated from the valve seat And at least a part of the outer peripheral surface of the shaft-shaped member are separated from each other.

  Moreover, the liquid material discharge apparatus of this invention WHEREIN: The edge part by the side of the nozzle of a sheath-shaped member may be arrange | positioned in the position nearer to an opening part than a valve seat.

  Further, in the liquid material discharge device of the present invention, the end of the sheath-like member on the nozzle side is disposed at a position closer to the opening than the valve component when the valve component is in the state farthest from the valve seat. It may be.

  In the liquid material discharge device of the present invention, the cylindrical container is disposed at a constant inner diameter portion having a constant inner diameter and a position closer to the valve seat than the constant inner diameter portion, and the inner diameter gradually decreases as the valve seat is approached. The end portion on the nozzle side of the sheath-like member may be disposed inside the inner diameter changing portion.

  Further, in the liquid material discharge device of the present invention, the cylindrical container is disposed at a constant inner diameter portion having a constant inner diameter and a position closer to the valve seat than the constant inner diameter portion, and has an inner diameter smaller than the inner diameter of the constant inner diameter portion. The end portion on the nozzle side of the sheath-like member may be disposed in a region closer to the opening than the small-diameter portion. In this case, the surface in contact with the liquid material in the connecting portion may be arranged so as to be orthogonal to the axial direction of the cylindrical container.

  Further, the liquid material discharge device of the present invention may further include a seal member for preventing the liquid material from entering the gap between the sheath-shaped member and the shaft-shaped member.

  Further, in the liquid material discharge device of the present invention, the liquid material stored in the cylindrical container has a viscosity at a rotational speed of 1 RPM measured by an E-type viscometer in an environment having an ambient temperature of 23 ° C. and a relative humidity of 50%. The liquid substance which has the property which becomes the value within the range of 50-1000 Pa.sec may be sufficient.

  Further, in the liquid material discharge device of the present invention, the liquid material stored in the cylindrical container is at a rotational speed of 1 RPM with respect to the viscosity measured by an E-type viscometer in an environment having an ambient temperature of 23 ° C. and a relative humidity of 50%. The liquid substance which has the property which the value which remove | divided the viscosity by the viscosity in 5 RPM of rotation becomes the value in the range of 1.1-6.0 may be sufficient.

  In the liquid material discharge device of the present invention, the liquid material stored in the cylindrical container is a resin that is cured by heat or electromagnetic waves, and when the electronic component is mounted on the mounting object, the electronic component and the mounting object are mounted. It may be interposed between the electronic component and the mounted object in order to bond the object.

  In the liquid material discharge device of the present invention, the liquid material stored in the cylindrical container by the sheath member in either the state where the valve component is in contact with the valve seat or the state where the valve component is separated from the valve seat And at least a part of the outer peripheral surface of the shaft-shaped member are separated from each other. Thereby, according to this invention, the area of the area | region where a shaft-shaped member and a liquid substance contact reduces compared with the case where there is no sheath-shaped member. As a result, according to the present invention, the problems caused by the contact between the reciprocating shaft-like member and the liquid material are alleviated, and a small amount of liquid material can be discharged stably and with high accuracy. The effect of becoming.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 are cross-sectional views of a liquid material discharge device according to an embodiment of the present invention. 1 to 3 show different states.

  As shown in FIGS. 1 to 3, the liquid material discharge device 1 according to the present embodiment includes a cylindrical container 3 that stores a liquid material 2. The cylindrical container 3 includes a syringe 10 and a nozzle member 20 attached to a portion of the syringe 10 on the distal end side (downward in FIGS. 1 to 3). The liquid material discharge device 1 further includes a shaft-shaped member 30 inserted into the cylindrical container 3, a drive device 40 that reciprocates the shaft-shaped member 30 in the axial direction, and the shaft-shaped member 30 in the cylindrical container 3. And a fixing member 60 connected to the sheath-like member 50. In the following description, when viewed from the syringe 10, the nozzle member 20 side is referred to as the front end side or the lower side, and the opposite side is referred to as the rear end side or the upper side.

  The nozzle member 20 includes a cylindrical connection portion 21 connected to the distal end side portion of the syringe 10 and a nozzle 22 provided on the distal end side of the connection portion 21. The nozzle 22 has a discharge side end 22a for discharging a liquid material and an inlet side end 22b on the opposite side. The nozzle member 20 further includes a valve seat (valve seat) 23 disposed at a position adjacent to the inlet side end 22 b of the nozzle 22. 1 to 3 show an example in which the valve seat 23 is formed of a member different from the portion including the connection portion 21 and the nozzle 22, but the valve seat 23 is connected to the connection portion 21 and the nozzle 22. It may be formed integrally.

  The syringe 10 has a constant inner diameter portion 11 having a constant inner diameter, a small diameter portion 12 which is disposed closer to the valve seat 23 than the constant inner diameter portion 11 and has an inner diameter smaller than the inner diameter of the constant inner diameter portion 11, and a constant inner diameter. The connecting part 13 which connects the part 11 and the small diameter part 12 is included. An opening 11 a is formed at the end of the constant inner diameter portion 11 opposite to the small diameter portion 12. The syringe 10 further includes a flange portion 14 disposed around the opening 11a. The connection portion 21 of the nozzle member 20 is connected to the small diameter portion 12.

  The connecting portion 13 is disposed at a position closer to the valve seat 23 than the constant inner diameter portion 11, and the inner diameter gradually decreases as it approaches the valve seat 23. 1 to 3 show an example in which the shape of the connecting portion 13 is a shape corresponding to the side surface of the truncated cone. However, the shape of the connecting portion 13 is not limited to this, and may be, for example, a curved surface curved so as to protrude outward. The connecting portion 13 corresponds to the inner diameter changing portion in the present invention.

  The shaft-shaped member 30 is a first part 31 having an elongated cylindrical shape, and a cylindrical second part that is disposed at a position closer to the valve seat 23 than the first part 31 and has a smaller diameter than the first part 31. And a connecting portion 33 for connecting the first portion 31 and the second portion 32 to each other. The connecting portion 33 has a truncated cone shape that gradually decreases in inner diameter as it approaches the second portion 32. A conical valve component 34 is formed at one end (tip) in the axial direction of the shaft-shaped member 30, that is, at the tip of the second portion 32. The valve constituting part 34 constitutes a valve for switching between supply and shutoff of the liquid material 2 stored in the cylindrical container 3 to the nozzle 22 together with the valve seat 23. The valve component 34 is configured to select a state in which the shaft member 30 abuts on the valve seat 23 and a state in which the shaft member 30 deviates from the valve seat 23 as the shaft member 30 reciprocates.

  As a material of the valve seat 23 and the shaft-shaped member 30, for example, a metal material such as stainless steel, tool steel, and hard alloy, or a ceramic material can be used. Further, the valve seat 23 and the shaft-shaped member 30 may be partially subjected to surface treatment such as plating with a metal material such as chromium or nickel, or thermal spraying with a tungsten carbide material.

  The sheath-like member 50 includes a cylindrical first portion 51 and a tapered portion 52 disposed at a position closer to the valve seat 23 than the first portion 51. The inner diameter of the first portion 51 is larger than the outer diameter of the first portion 31 in the shaft-shaped member 30, and the inner peripheral surface of the first portion 51 in the sheath-shaped member 50 and the first portion in the shaft-shaped member 30. A gap is formed between the outer peripheral surface of 31. The tapered portion 52 has a cylindrical shape, and its outer diameter gradually decreases as it approaches the valve seat 23. That is, the shape of the outer peripheral surface of the tapered portion 52 is similar to the shape of the inner peripheral surface of the connecting portion 13 in the syringe 10. The inner diameter of the tapered portion 52 is smaller than the inner diameter of the first portion 51. As shown in FIG. 1, the tapered portion 52 is disposed below the connecting portion 33 in the shaft-like member 30 in a state where the valve component 34 is in contact with the valve seat 23. The inner peripheral surface of the tapered portion 52 faces the outer peripheral surface of the second portion 32 of the shaft-like member 30 with a slight gap.

  As a material of the sheath-like member 50, for example, a metal material such as stainless steel, copper, or aluminum, or a resin material resistant to the liquid 2 to be used can be used. As the resin material, for example, polyethylene, polypropylene, fluorine-based resin, or urethane can be used. Tubes of the above metal materials and resin materials are commercially available and can be easily obtained. Therefore, the sheath member 50 may be formed using such a tube. For example, the sheath member 50 may be formed by cutting a stainless steel tube having a thickness of about 0.5 mm. In this case, an object in which the tube serving as the sheath member 50 and the thick portion serving as the fixing member 60 are integrated is processed to form an object in which the sheath member 50 and the fixing member 60 are integrated. Also good. The tapered portion 52 of the sheath-like member 50 can be formed by, for example, performing swage processing, cutting processing, or both of the processing on the tube that becomes the sheath-like member 50.

  The fixing member 60 includes a first portion 61 connected to the rear end portion of the sheath-like member 50 and a second portion 62 provided on the rear end side of the first portion 61. The outer diameter of the first portion 61 is larger than the outer diameter of the first portion 51 in the sheath-like member 50. The outer diameter of the second portion 62 is larger than the outer diameter of the first portion 61. The first portion 61 is inserted into the constant inner diameter portion 11 from the opening 11 a of the constant inner diameter portion 11 in the syringe 10. The second portion 62 is disposed on the flange portion 14 in the syringe 10. An O-ring 63 is attached to the outer peripheral surface of the first portion 61. The O-ring 63 is in contact with the inner peripheral surface of the constant inner diameter portion 11. Further, the fixing member 60 is provided with a hole 60 a having an inner diameter equal to the inner diameter of the first portion 51 in the sheath-like member 50 and allowing the shaft-like member 30 to be inserted.

  The drive device 40 uses, for example, a solenoid. The drive device 40 includes a case 41, an excitation coil 42 housed in the case 41, an iron core 43 and a spring 44 inserted through the central portion of the excitation coil 42, and an adjustment screw 45. Yes. The case 41 has an inner diameter equal to the inner diameter of the first portion 51 of the sheath-like member 50 and is provided with a hole 41 a through which the shaft-like member 30 is inserted. An O-ring 46 is provided between the surface constituting the hole 41 a in the case 41 and the outer peripheral surface of the first portion 31 of the shaft-shaped member 30.

  A rear end portion of the first portion 31 in the shaft-shaped member 30 is connected to the iron core 43. The iron core 43 is movable in the axial direction of the shaft-shaped member 30 in the case 41. The spring 44 applies a force in a direction to push down the iron core 43. In a state where the excitation coil 42 is not energized, the iron core 43 is pushed down by the spring 44. On the other hand, when the excitation coil 42 is energized, the iron core 43 moves upward against the force of the spring 44. Thus, when the iron core 43 moves in the vertical direction, the shaft-like member 30 connected to the iron core 43 reciprocates in the axial direction. The adjusting screw 45 adjusts the stroke of the iron core 43, that is, the stroke of the shaft-shaped member 30. The drive device 40 is not limited to one using a solenoid, and may be any device as long as it can reciprocate the shaft-like member 30, and may be an air actuator, for example. The drive device 40 is preferably one that can reciprocate the shaft-like member 30 at high speed, accurately, and with high responsiveness.

  The case 41 has a fixing portion 41b that fixes the syringe 10, the fixing member 60, and the case 41 to each other by sandwiching the flange portion 14 of the syringe 10 and the second portion 62 of the fixing member 60. The sheath member 50 is fixed to the cylindrical container 3 by fixing the fixing member 60 to the syringe 10 by the fixing portion 41b. Thus, the sheath member 50 is arranged around the shaft-shaped member 30 so as not to be interlocked with the shaft-shaped member 30 in the cylindrical container 3. The sheath-like member 50 has the liquid material 2 stored in the cylindrical container 3 in both the state where the valve component 34 is in contact with the valve seat 23 and the state where the valve component 34 is separated from the valve seat 23. And at least a part of the outer peripheral surface of the shaft-shaped member 30 are separated from each other. The outer peripheral surface of the shaft-shaped member 30 refers to a surface of the outer surface of the shaft-shaped member 30 excluding both end surfaces in the axial direction.

  FIG. 2 shows a state in which the valve component 34 is farthest from the valve seat 23 when the stroke of the shaft-shaped member 30 is set to the shortest. FIG. 3 shows a state where the valve component 34 is farthest from the valve seat 23 when the stroke of the shaft-like member 30 is set to be the longest. The minimum value of the stroke of the shaft-shaped member 30 is such that a gap is formed between the valve component 34 and the valve seat 23 so as not to prevent passage of the liquid material 2 when the valve component 34 is farthest from the valve seat 23. To be set.

  A vent passage 70 is formed in the case 41 and the fixing member 60. One end of the air passage 70 is disposed in the vicinity of the opening 11 a of the constant inner diameter portion 11 of the syringe 10 and communicates with the space in the constant inner diameter portion 11. The other end of the air passage 70 is disposed on the side surface of the case 41. An air pipe 71 is connected to the other end of the air passage 70.

  The liquid material discharge device 1 further includes a plunger 80 disposed on the liquid material 2 in the constant inner diameter portion 11 of the syringe 10. The surface in contact with the liquid material 2 in the plunger 80 is a slope parallel to the inner peripheral surface of the connecting portion 13 of the syringe 10. The plunger 80 is provided with a hole having an inner diameter slightly larger than the outer diameter of the first portion 51 of the sheath-like member 50. Thereby, the plunger 80 can move within the constant inner diameter portion 11 according to the position of the liquid surface of the liquid material 2, that is, the surface of the liquid material 2 on the opening 11a side.

  The liquid material discharge apparatus 1 further includes a heater 90 that is disposed around the nozzle member 20 and heats the nozzle member 20.

  Examples of the liquid material 2 discharged using the liquid material discharge apparatus 1 include an adhesive, a sealant, and a coating agent. The adhesive as the liquid material 2 is, for example, a resin that is cured by heat or electromagnetic waves, and an electronic component for bonding the electronic component and the mounted object when the electronic component is mounted on the mounted object. Some are interposed between the mounted objects. The liquid material 2 is not limited to a liquid, and may contain a fine solid as long as it flows as a whole.

  Here, with reference to FIG. 1 thru | or FIG. 3, the positional relationship of the cylindrical container 3, the shaft-shaped member 30, and the sheath-shaped member 50 is demonstrated. In the cylindrical container 3, the limit position closest to the opening 11 a is defined in the syringe 10 with respect to the liquid level of the liquid 2, that is, the position of the surface of the liquid 2 on the opening 11 a side. 1 to 3 show a state in which the liquid level of the liquid material 2 is in the limit position. The end of the sheath member 50 on the opening 11a side, that is, the rear end is preferably disposed at a position farther from the valve seat 23 than the limit position. In this case, since the rear end portion of the sheath-like member 50 is always above the liquid level of the liquid material 2, the shaft-like member 30 is located at a position above the rear end portion of the sheath-like member 50. There is no contact with the liquid 2. The rear end portion of the sheath-like member 50 may be disposed in a region between the opening portion 11a and the limit position.

  The end of the sheath-like member 50 on the nozzle 22 side is disposed at a position closer to the opening 11 a than the valve seat 23. As shown in FIG. 2, the end of the sheath-like member 50 on the nozzle 22 side is closer to the opening than the valve component 34 when the valve component 34 is farthest from the valve seat 23. It may be arranged. In this case, the sheath-like member 50 is a liquid material in the cylindrical container 3 in both the state where the valve component 34 is in contact with the valve seat 23 and the state where the valve component 34 is separated from the valve seat 23. 2 is separated from a part of the outer peripheral surface of the shaft-shaped member 30.

  Alternatively, as shown in FIG. 3, the end of the sheath-like member 50 on the nozzle 22 side is the same position as the valve component 34 when the valve component 34 is farthest from the valve seat 23 in the axial direction. Alternatively, it may be arranged at a position slightly closer to the valve seat 23 than the position. In this case, the sheath-like member 50 separates the liquid material 2 and a part of the outer peripheral surface of the shaft-like member 30 in the cylindrical container 3 in a state where the valve component 34 is in contact with the valve seat 23. In the state where the valve component 34 is farthest from the valve seat 23, the liquid material 2 is separated from the entire outer peripheral surface of the shaft-shaped member 30 in the cylindrical container 3.

  Further, the end of the sheath-like member 50 on the nozzle 22 side may be disposed in a region closer to the opening 11 a than the small diameter portion 12 in the syringe 10. In this case, the end of the sheath-like member 50 on the nozzle 22 side may be disposed inside the connecting portion 13 in the syringe 10. In addition, also when the edge part by the side of the nozzle 22 of the sheath-like member 50 is arrange | positioned in the position of the same height as the edge part by the side of the opening part 11a of the small diameter part 12, the edge part by the side of the nozzle 22 of the sheath-like member 50 Is included in the above region.

  The smaller the thickness of the sheath-like member 50, the better. In addition, when using a commercially available tube as the sheath-like member 50, it is preferable that the thickness of the sheath-like member 50 is 0.2 mm or more. However, when the sheath member 50 is formed by cutting the tube, since the processing becomes difficult if the sheath member 50 is too thin, the sheath member 50 has a thickness of 0.5 mm or more. It is preferable. The size of the gap between the sheath-like member 50 and the shaft-like member 30 is not limited so long as the sheath-like member 50 prevents the reciprocating motion of the shaft-like member 30 and is 0.01 to 1.0 mm. It is preferable. Since the volume of the liquid material 2 that can be stored in the tubular member 3 decreases as the outer diameter of the first portion 51 of the sheath-like member 50 increases, it is not preferable that the outer diameter is too large. From these things, it is preferable that the outer diameter of the 1st part 51 in the sheath-like member 50 is larger by 0.5-3.0 mm than the outer diameter of the 1st part 31 in the shaft-shaped member 30.

  Next, the relationship among the diameters of the syringe 10, the shaft-shaped member 30, and the sheath-shaped member 50 will be described. Here, as an example, a case where the syringe 10 having a capacity of 10 cc with respect to the liquid material 2 is used will be described. In this case, the inner diameter of the constant inner diameter portion 11 of the syringe 10 is about 15 mm. The outer diameter of the 1st part 31 in the shaft-shaped member 30 exists in the range of 1.0-5.0 mm, for example. Accordingly, the value of [the outer diameter of the first portion 31] / [the inner diameter of the constant inner diameter portion 11], which is the ratio of the outer diameter of the first portion 31 and the inner diameter of the constant inner diameter portion 11, is, for example, 1.0 / It is in the range of 15 to 5.0 / 15.

  The outer diameter of the first portion 51 in the sheath-like member 50 is larger than the outer diameter of the first portion 31 in the shaft-like member 30 by, for example, 0.5 to 3.0 mm. That is, the outer diameter of the first portion 51 is, for example, in the range of 1.5 to 8.0 mm. Accordingly, the value of [the outer diameter of the first portion 51] / [the inner diameter of the constant inner diameter portion 11], which is the ratio of the outer diameter of the first portion 51 and the inner diameter of the constant inner diameter portion 11, is, for example, 1.5 / It is in the range of 15 to 8.0 / 15.

  Next, the operation of the liquid material discharge apparatus 1 according to the present embodiment will be described. In the cylindrical container 3 including the syringe 10 and the nozzle member 20, the liquid material 2 to be discharged by the liquid material discharge device 1 is stored. A plunger 80 is disposed on the liquid material 2 in the constant inner diameter portion 11 of the syringe 10. In the constant inner diameter portion 11, high pressure air is appropriately supplied to the space above the plunger 80 through the air pipe 71 and the air passage 70, thereby applying a constant pressure equal to or higher than atmospheric pressure.

  The shaft-like member 30 is driven by the drive device 40 and reciprocates in the axial direction. As shown in FIG. 1, in a state where the shaft-shaped member 30 is located at the lowest position, the valve component 34 abuts on the valve seat 23 and the supply of the liquid material 2 to the nozzle 22 is blocked. Therefore, in this state, the liquid material 2 is not discharged from the discharge side end 22a of the nozzle 22. On the other hand, as shown in FIG. 2 or FIG. 3, when the shaft-like member 30 is above the position shown in FIG. 1, the valve component 34 is separated from the valve seat 23 and The liquid 2 is supplied to the nozzle 22 by the pressure applied to the space and discharged from the discharge side end 22a.

  Next, the effect of the liquid material discharge apparatus 1 according to the present embodiment will be described. In the liquid material discharge device 1 according to the present embodiment, the sheath-like member 50 allows the valve component 34 to be in contact with the valve seat 23 and the valve component 34 to be separated from the valve seat 23. The liquid 2 stored in the cylindrical container 3 is separated from at least a part of the outer peripheral surface of the shaft-shaped member 30. Therefore, according to the present embodiment, the area of the region where the outer peripheral surface of the shaft-like member 30 and the liquid material 2 are in contact with each other is reduced as compared with the case where the sheath-like member 50 is not provided. As a result, according to the present embodiment, problems caused by the contact between the reciprocating shaft member 30 and the liquid material 2 are alleviated.

  Specifically, first, according to the present embodiment, the viscous resistance due to the liquid material 2 received by the shaft-like member 30 is reduced. Thereby, according to this Embodiment, it becomes possible to speed up the reciprocating motion of the shaft-shaped member 30, and to improve the discharge precision of the liquid material 2. FIG.

  Next, the effect of the liquid material discharge device 1 according to the present embodiment when the liquid material 2 having particularly high thixotropy is used will be described. When the sheath member 50 is not provided, as described with reference to FIG. 13, the liquid material remains in the vicinity of the inner peripheral surface of the syringe, and the liquid material cannot be discharged while the liquid material remains in the syringe. The problem of becoming. On the other hand, according to the present embodiment, since the area of the region where the outer peripheral surface of the shaft-like member 30 and the liquid material 2 are in contact with each other is reduced as compared with the case where the sheath-like member 50 is not provided, the above problem Can be prevented.

  Note that a part of the outer peripheral surface of the shaft-shaped member 30 is in contact with the liquid material 2 inside the small diameter portion 12 of the syringe 10. Therefore, the viscosity of the liquid material 2 may decrease inside the small diameter portion 12. However, since the inner diameter of the small diameter portion 12 is smaller than the inner diameter of the constant inner diameter portion 11, the decrease in the viscosity of the liquid material 2 inside the small diameter portion 12 can also occur in the vicinity of the inner peripheral surface of the small diameter portion 12. Therefore, the problem that the liquid 2 having a high viscosity remains in the vicinity of the inner peripheral surface of the small diameter portion 12 hardly occurs.

  From the above, according to the liquid material discharge device 1 according to the present embodiment, it is possible to stably discharge a small amount of the liquid material 2 with high accuracy, and the liquid material 2 is contained in the syringe 10. It is possible to prevent the liquid 2 from being discharged while remaining.

  By the way, when the end of the sheath member 50 on the nozzle 22 side is disposed inside the small diameter portion 12 of the syringe 10, it is formed between the outer peripheral surface of the sheath member 50 and the inner peripheral surface of the small diameter portion 12. There is a possibility that the passage of the liquid 2 is too narrow. Therefore, as shown in FIGS. 1 to 3, the end of the sheath-like member 50 on the nozzle 22 side is disposed in a region closer to the opening 11 a than the small-diameter portion 12, so that the sheath-like member 50 has a small diameter. It is possible to prevent the passage of the liquid material 2 in the portion 12 from being narrowed. In particular, by disposing the end portion of the sheath-like member 50 on the nozzle 22 side inside the connecting portion 13, the sheath-like member 50 covers as long a region as possible without narrowing the passage of the liquid material 2 in the small-diameter portion 12. It becomes possible to separate the outer peripheral surface of the shaft-shaped member 30 from the liquid material 2.

  Further, a tapered portion 52 is provided in the vicinity of the end portion of the sheath-like member 50 on the nozzle 22 side, and the shape of the outer peripheral surface of the tapered portion 52 is made similar to the shape of the inner peripheral surface of the connecting portion 13 in the syringe 10. Therefore, the outer peripheral surface of the shaft-shaped member 30 can be separated from the liquid material 2 over the longest possible region by the sheath-like member 50 without narrowing the passage of the liquid material 2.

  Next, with reference to FIG. 4 thru | or FIG. 7, the 1st thru | or 4th modification of the liquid discharge apparatus 1 which concerns on this Embodiment is demonstrated. In the present embodiment, the sheath-like member 50 separates the liquid material 2 and at least a part of the outer peripheral surface of the shaft-like member 30 in the cylindrical container 3. Therefore, it is necessary to prevent the liquid 2 from entering the gap between the sheath member 50 and the shaft member 30. In particular, when the viscosity of the liquid material 2 is high, the size of the gap between the inner peripheral surface of the tapered portion 52 and the outer peripheral surface of the second portion 32 of the shaft-shaped member 30 is appropriately set, thereby It is possible to prevent the liquid material 2 from entering the gap between the member 50 and the shaft member 30.

  In order to more reliably prevent the liquid material 2 from entering the gap between the sheath-like member 50 and the shaft-like member 30, a seal member may be provided. The first to third modifications are examples in which different seal members are provided.

  FIG. 4 is a cross-sectional view showing the vicinity of the seal member in the first modification. In FIG. 4, the line indicated by the symbol L <b> 1 represents the position of the tip of the shaft-like member 30 in a state where the valve component 34 is in contact with the valve seat 23. The line indicated by the symbol L <b> 2 represents the position of the tip of the shaft-like member 30 when the valve component 34 is farthest from the valve seat 23. In the first modification, the sheath-like member 50 does not have the tapered portion 52, and the sheath-like member 50 has a constant inner diameter and a constant outer diameter. An O-ring 53 as a seal member is attached to the outer peripheral surface of the first portion 31 of the shaft-like member 30. The O-ring 53 is in contact with the inner peripheral surface of the sheath-like member 50.

  FIG. 5 is a side view showing the vicinity of the seal member in the second modification. The meaning of each line indicated by symbols L1 and L2 in FIG. 5 is as described above. Also in the second modification, the sheath-like member 50 does not have the tapered portion 52, and the sheath-like member 50 has a constant inner diameter and a constant outer diameter. In the second modification, an expandable / contractible bellows-shaped cover 54 is provided as a seal member. One end of the cover 54 is fixed to the outer peripheral surface in the vicinity of the end of the sheath-like member 50 on the nozzle 22 side. The other end of the cover 54 is fixed to the outer peripheral surface of the second portion 32 of the shaft-shaped member 30. The cover 54 is formed of a material that does not deteriorate or dissolve in the liquid 2 to be used.

  FIG. 6 is a side view showing the vicinity of the seal member in the third modification. The meaning of each line indicated by symbols L1 and L2 in FIG. 6 is as described above. Also in the third modified example, the sheath-like member 50 does not have the tapered portion 52, and the sheath-like member 50 has a constant inner diameter and a constant outer diameter. In the third modification, an expandable / contractible tubular cover 55 is provided as a seal member. One end portion of the cover 55 is fixed to the outer peripheral surface in the vicinity of the end portion of the sheath-like member 50 on the nozzle 22 side. The other end of the cover 55 is fixed to the outer peripheral surface of the second portion 32 of the shaft-shaped member 30. The cover 55 is a material that does not deteriorate or dissolve with respect to the liquid 2 to be used, and is formed of a flexible material. As a material of the cover 55, for example, rubber or thermoplastic elastomer can be used. Further, as the cover 55, a flexible heat-shrinkable tube may be used.

  FIG. 7 is a cross-sectional view showing the liquid material discharge device 1 in the fourth modification. In the fourth modified example, the surface 13 a in contact with the liquid material 2 in the connecting portion 13 of the syringe 10 is disposed so as to be orthogonal to the axial direction of the cylindrical container 3. In the fourth modified example, the end of the sheath-like member 50 on the nozzle 22 side is located at the opening 11a rather than the small-diameter portion 12 so that the passage of the liquid 2 in the small-diameter portion 12 is not narrowed by the sheath-like member 50. It is preferable that they are arranged in a close region. In the fourth modification, the surface of the plunger 80 that contacts the liquid material 2 is parallel to the surface 13 a of the connecting portion 13 that contacts the liquid material 2, that is, orthogonal to the axial direction of the cylindrical container 3. It is a surface to do.

  Next, preferable properties of the liquid material 2 used in the present embodiment will be described. As for the liquid 2 used in the present embodiment, there is a limit to discharge at an extremely high viscosity, and it is difficult to knead the raw materials in the production, or the liquid 2 is taken into the liquid 2 during stirring. A desirable viscosity range exists because there are problems such as difficulty in defoaming air. Specifically, the liquid 2 used in the present embodiment has a viscosity of 50 to 1000 Pa · sec at a rotational speed of 1 RPM measured by an E-type viscometer in an environment having an ambient temperature of 23 ° C. and a relative humidity of 50%. It is preferable to have a property (hereinafter referred to as a first property) that becomes a value within the range. Further, the liquid material 2 used in the present embodiment is obtained by dividing the viscosity at a rotational speed of 1 RPM by the viscosity at a rotational speed of 5 RPM with respect to the viscosity measured by an E-type viscometer in an environment of an ambient temperature of 23 ° C. and a relative humidity of 50%. It is preferable that the measured value (hereinafter referred to as the viscosity ratio) has a property (referred to as a second property) that becomes a value within the range of 1.1 to 6.0. More preferably, the liquid 2 used in the present embodiment has both the first property and the second property.

  Further, the liquid 2 used in the present embodiment has a viscosity at a rotational speed of 1 RPM measured by an E-type viscometer in an environment having an ambient temperature of 23 ° C. and a relative humidity of 50% within a range of 100 to 700 Pa · sec. It is more preferable to have a property that becomes a value (hereinafter referred to as a third property). Moreover, it is more preferable that the liquid material 2 used in the present embodiment has a property (referred to as a fourth property) in which the viscosity ratio is a value in the range of 1.5 to 4.0. It is more preferable that the liquid material 2 used in the present embodiment has both the third property and the fourth property.

  Next, the result of the experiment performed in order to confirm the effect of the liquid discharge apparatus 1 which concerns on this Embodiment is demonstrated. In this experiment, using the liquid material discharge device 1 of the example of the present embodiment and the liquid material discharge device of the comparative example, the discharge status for three types of liquid materials A to C having different characteristics was examined. In the liquid discharge device 1 of the embodiment, the sheath member 50 is formed using a stainless steel tube. Further, as shown in FIG. 6, the liquid discharge device 1 of the embodiment includes a cover 55 made of a rubber tube as a seal member. The liquid material discharge device of the comparative example is obtained by removing the sheath member 50 and the cover 55 from the liquid material discharge device 1 of the embodiment.

  The liquid materials A to C are all thermosetting adhesives composed of an epoxy resin, a curing agent, and an inorganic filler. The viscosity at a rotational speed of 1 RPM measured by an E-type viscometer in an environment of an ambient temperature of 23 ° C. and a relative humidity of 50% is 80 Pa · sec for liquid A, 200 Pa · sec for liquid B, and 400 Pa for liquid C. -Sec. The viscosity ratio is 1 for liquid A, 2.5 for liquid B, and 3.6 for liquid C.

  The discharge state was determined by whether or not the liquid material was depressed around the shaft-shaped member 30 in the syringe 10 when the liquid material was repeatedly discharged. The smaller the degree of depression of the liquid material around the shaft-shaped member 30, the better the discharge, and the less liquid material remains in the syringe 10 when the discharge becomes impossible. Table 1 below shows the results of the experiment. The “viscosity” in Table 1 is the viscosity at a rotational speed of 1 RPM measured by an E-type viscometer in an environment having an ambient temperature of 23 ° C. and a relative humidity of 50%. In addition, “O” in Table 1 indicates that the liquid material did not sink around the shaft-shaped member 30, and “X” indicates that the liquid material collapsed around the shaft-shaped member 30. Represents that.

  As can be seen from the results shown in Table 1, with respect to the liquid A having almost no thixotropy and a relatively low viscosity, the liquid material discharge device 1 of the example and the liquid material discharge device of the comparative example are both shafts. The liquid material did not sink around the member 30 and good discharge was performed. On the other hand, for liquid materials B and C having high viscosity and thixotropy, in the liquid material discharge device of the comparative example, a portion of the liquid material in the vicinity of the shaft member 30 is selectively supplied to the nozzle 22. The tendency to be remarkably appeared, and the depression of the liquid material around the shaft-shaped member 30 occurred. As a result, more than half of the liquid material remained in the syringe 10 at the time when the liquid materials B and C could not be discharged in the liquid material discharge device of the comparative example. On the other hand, in the liquid material discharge device 1 of the example, the liquid materials B and C did not cause the liquid material to sink around the shaft-shaped member 30, and good discharge was performed.

  As can be seen from the results of the above-described experiment, the liquid discharge device 1 according to the present embodiment has a property that the viscosity is high and the thixotropy is high particularly in a stopped state or a flow state close to stopping. A remarkable effect is exhibited when using. The property of the liquid material 2 is particularly suitable for a resin for bonding the electronic component and the mounted object when the electronic component is mounted on the mounted object such as a wiring board or a semiconductor device. This is because the liquid material 2 having the above-described properties has a low viscosity when being discharged by the liquid material discharge device 1, so that the discharge becomes easy, and after application, the viscosity increases and flows from a desired position. This is to maintain a certain shape without spreading. According to the liquid material discharge apparatus 1 according to the present embodiment, the liquid material 2 having the above-described properties can be stably and accurately applied to a target area having a small area on the object to be coated. Therefore, by using the liquid material discharge device 1 according to the present embodiment, it becomes possible to efficiently perform high-density mounting and mounting of minute parts.

  Next, a liquid material application method using the liquid material discharge apparatus 1 according to the present embodiment will be described. In this liquid material application method, the liquid material 2 stored in the cylindrical container 3 is discharged using the liquid material discharge device 1 according to the present embodiment, and the discharged liquid material 2 is applied to the object to be coated. It is a method to do. The liquid material 2 used in this liquid material coating method preferably has at least one of the first property and the second property, and has the third property and the fourth property. It is more preferable to have at least one of the following. According to this liquid material application method, as described above, it is possible to apply stably and accurately to a target portion having a small area in an object to be applied. This liquid material application method can be used in a method for manufacturing an electronic device to be described later, for example, application of an adhesive for bonding and sealing substrates made of liquid crystal glass or resin, or a windshield of an automobile. Can also be used to apply an adhesive for adhering to the vehicle body.

  Next, a method for manufacturing an electronic device using the liquid material discharge device 1 according to the present embodiment will be described. The electronic device manufacturing method is a method of manufacturing an electronic device including an electronic component and a mounted object by mounting the electronic component on the mounted object. The manufacturing method of the electronic device includes a step of interposing an adhesive resin that is cured by heat or electromagnetic waves between the electronic component and the mounted object in order to bond the electronic component and the mounted object, And a step of curing the adhesive resin by applying heat or electromagnetic waves to the adhesive resin in a state where the adhesive resin is interposed between the package and the package. In the step of interposing the adhesive resin between the electronic component and the mounted object, the liquid material discharging apparatus 1 according to the present embodiment is used, and at least one of the electronic component and the mounted object is used as the liquid material 2. A step of applying an adhesive resin.

  In the above electronic device manufacturing method, the mounted object is, for example, a wiring board or a semiconductor device. Moreover, the electronic component may be a wiring board different from the wiring board as the mounted object. Therefore, the manufacturing method of an electronic device includes the case where an electronic device is manufactured by connecting wiring boards together.

  Next, a specific example of the method for manufacturing the electronic device will be described with reference to FIGS. 8 and 9 are perspective views for explaining an example of a method for manufacturing an electronic device. The electronic device manufacturing method is a method of manufacturing an electronic device including the electronic component 120 and the circuit board 110 by mounting the electronic component 120 on the circuit board 110.

  FIG. 8 shows one step in the method for manufacturing an electronic device. In this step, the bonding resin 113 is applied to the target location on the circuit board 110 using the liquid material discharge device 1 according to the present embodiment. The adhesive resin 113 is a resin that is cured by heat or electromagnetic waves in a specific wavelength range.

  FIG. 9 shows the next step. In this step, the electronic component 120 held by the collet (adsorption holder) 140 is disposed at a position facing the circuit board 110 via the adhesive resin 113. Next, the electronic component 120 and the circuit board 110 are pressed by the collet 140 so that they are in close contact with each other, and heat or electromagnetic waves in a specific wavelength region are applied to the adhesive resin 113 to cure the adhesive resin 113. . Thereby, the electronic component 120 is mounted on the circuit board 110 and the electronic device is completed.

  Hereinafter, the method for manufacturing the electronic device shown in FIGS. 8 and 9 will be described in more detail with reference to FIGS. FIG. 10 is a cross-sectional view showing a process of disposing the electronic component 120 held by the collet 140 at a position facing the circuit board 110 via the adhesive resin 113. As shown in FIG. 10, the circuit board 110 has one surface 110a and an opposite surface 110b. In addition, the circuit board 110 has an opening 111 therethrough. The substrate 110 further has a plurality of conductor layers 112 exposed on one surface 110a.

  The electronic component 120 has one surface 120a and a surface 120b on the opposite side. In addition, the electronic component 120 has a functional surface 121 arranged on one surface 120a. The electronic component 120 is, for example, a solid-state image sensor, and in this case, the functional surface 121 is a light receiving surface. The electronic component 120 further includes a plurality of electrodes 122 arranged around the functional surface 121 on the surface 120a. The electrode 122 is a bump, for example. The opening 111 of the circuit board 110 described above is for exposing the functional surface 121. Further, the conductor layer 112 of the circuit board 110 is connected to the electrode 122 of the electronic component 120.

  In the method for manufacturing an electronic device, the circuit board 110 is placed on the support base 130 such that one surface 110 a faces upward and the opposite surface 110 b contacts the upper surface of the support base 130. The support base 130 has a suction hole 131 for sucking the circuit board 110. The support base 130 sucks and holds the circuit board 110 through the suction holes 131. In this state, as shown in FIG. 8, the bonding resin 113 is applied to the target location on the circuit board 110 using the liquid material discharge device 1 according to the present embodiment. The target location on the circuit board 110 is a location including a portion of the conductor layer 112 that is connected to the electrode 122 of the electronic component 120.

  Next, as shown in FIG. 10, the electronic component 120 is held by the collet 140 so that the surface 120 a faces downward. The collet 140 has a suction hole 141 for sucking the electronic component 120. The collet 140 sucks and holds the electronic component 120 from the suction hole 141. Moreover, the collet 140 has a built-in heater capable of adjusting the temperature. Further, the collet 140 is movable in the vertical and horizontal directions and can apply a load to the held electronic component 120.

  Next, as shown in FIG. 11, the collet 140 is lowered so that the functional surface 121 faces the opening 111 of the circuit board 110 and the electrode 122 faces the conductor layer 112 of the circuit board 110. The electronic component 120 is disposed on the circuit board 110.

  Next, in a state where the adhesive resin 113 is interposed between the circuit board 110 and the electronic component 120, the electrode 122 and the conductor layer 112 are brought into contact with each other to apply heat or an electromagnetic wave in a specific wavelength region to the adhesive resin 113. In addition, the electrode 122 and the conductor layer 112 are pressurized so that they are in close contact with each other. When heat is applied to the adhesive resin 113, the electronic component 120 is heated by, for example, the collet 140. By this step, the bonding resin 113 is cured, and the circuit board 110 and the electronic component 120 are bonded together, and the periphery of the connection portion between the electrode 122 and the conductor layer 112 is sealed. Through the series of steps described above, the electronic component 120 is mounted on the circuit board 110 to complete the electronic device.

  In addition, this invention is not limited to the said embodiment, A various change is possible. For example, the liquid material discharge device of the present invention is not limited to the liquid material having the properties described in the embodiment, and can be used for discharging various liquid materials.

It is sectional drawing of the liquid discharge apparatus which concerns on one embodiment of this invention. It is sectional drawing which shows the other state of the liquid discharge apparatus shown in FIG. It is sectional drawing which shows the further another state of the liquid discharge apparatus shown in FIG. It is sectional drawing which shows the vicinity of the sealing member in the 1st modification of one embodiment of this invention. It is a side view which shows the vicinity of the sealing member in the 2nd modification of one embodiment of this invention. It is a side view which shows the vicinity of the sealing member in the 3rd modification of one embodiment of this invention. It is sectional drawing which shows the liquid discharge apparatus of the 4th modification of one embodiment of this invention. It is a perspective view for demonstrating an example of the manufacturing method of the electronic device using the liquid discharge apparatus concerning one embodiment of this invention. It is a perspective view for demonstrating an example of the manufacturing method of the electronic device using the liquid discharge apparatus concerning one embodiment of this invention. FIG. 10 is a cross-sectional view for explaining in detail a method for manufacturing the electronic device shown in FIGS. 8 and 9. It is sectional drawing for demonstrating the process following the process shown in FIG. It is explanatory drawing for demonstrating the problem in the conventional liquid discharge apparatus. It is explanatory drawing for demonstrating the problem in the conventional liquid discharge apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Liquid substance discharge apparatus, 2 ... Liquid substance, 3 ... Cylindrical container, 10 ... Syringe, 20 ... Nozzle member, 22 ... Nozzle, 23 ... Valve seat, 30 ... Shaft-shaped member, 34 ... Valve component part, 40 ... Drive device, 50 ... sheath member, 60 ... fixing member.

Claims (10)

A cylindrical container for storing a liquid material;
A shaft member inserted into the cylindrical container;
A drive device for reciprocating the axial member in the axial direction;
The cylindrical container is provided at one end in the axial direction of the cylindrical container, and includes a nozzle having a discharge side end for discharging the liquid material and an inlet side end on the opposite side, and a cylindrical container. An opening provided at the other end in the axial direction and a position adjacent to the inlet side end of the nozzle, and switching between supply and blocking of the liquid material stored in the cylindrical container to the nozzle Comprising a valve seat that forms part of the valve to perform,
The shaft-shaped member is provided at one end of the shaft-shaped member in the axial direction, and a state in which the shaft-shaped member reciprocates and abuts on the valve seat and a state separated from the valve seat are selected. Including a valve component constituting the valve together with the valve seat;
When the valve component part deviates from the valve seat, the liquid substance discharge device that selectively discharges the liquid substance stored in the cylindrical container from the discharge side end of the nozzle,
Further, in the cylindrical container, the valve component is disposed around the shaft member so as not to be interlocked with the shaft member, and the valve component is in contact with the valve seat and the valve component is the valve seat. In any of the states deviated from, a sheath member that separates the liquid material stored in the cylindrical container and at least a part of the outer peripheral surface of the shaft member ;
A liquid material discharge device comprising: a fixing member connected to an end of the sheath-like member on the opening side and fixed to the cylindrical container so as to close the opening . Wherein the nozzle end of the sheath member, the liquid product discharge device according to claim 1, characterized in that it is located closer to the opening than the valve seat. The end of the sheath-like member on the nozzle side is disposed at a position closer to the opening than the valve component when the valve component is in the state farthest from the valve seat. The liquid discharge apparatus according to claim 1 . The cylindrical container includes a constant inner diameter portion having a constant inner diameter, and an inner diameter changing portion that is disposed at a position closer to the valve seat than the constant inner diameter portion, and the inner diameter gradually decreases as the valve seat is approached. ,
The nozzle side end of the sheath member, the liquid material delivery device according to any one of claims 1 to 3, characterized in that it is disposed inside the inner diameter change portion. The cylindrical container includes a constant inner diameter portion having a constant inner diameter, a small diameter portion disposed at a position closer to the valve seat than the constant inner diameter portion, and having an inner diameter smaller than the inner diameter of the constant inner diameter portion, and the inner diameter A connecting portion that connects the fixed portion and the small diameter portion;
The nozzle side end of the sheath member, the liquid material delivery device according to any one of claims 1 to 3, characterized in that arranged in the region closer to the opening than the small diameter portion . The liquid material discharge device according to claim 5 , wherein a surface of the connecting portion that contacts the liquid material is disposed so as to be orthogonal to an axial direction of the cylindrical container. Furthermore, the liquid product according to any one of claims 1 to 6, further comprising a seal member for preventing the entry of liquid matter into the gap between the shaft-like member and the sheath member Discharge device. The liquid substance stored in the cylindrical container is a value in the range of 50 to 1000 Pa · sec at a rotation speed of 1 RPM measured by an E-type viscometer in an environment having an ambient temperature of 23 ° C. and a relative humidity of 50%. liquid material discharge device according to any one of claims 1 to 7, characterized in that a liquid material having a property to become. The liquid substance stored in the cylindrical container was obtained by dividing the viscosity at a rotational speed of 1 RPM by the viscosity at a rotational speed of 5 RPM with respect to the viscosity measured by an E-type viscometer in an environment of an ambient temperature of 23 ° C. and a relative humidity of 50%. liquid material discharge device according to any one of claims 1, wherein the value is a liquid substance having a property to become a value within the range of 1.1 to 6.0 8. The liquid substance stored in the cylindrical container is a resin that is cured by heat or electromagnetic waves, and when the electronic component is mounted on the mounted object, the electronic component and the mounted object are bonded together. liquid material discharge device according to any one of claims 1 to, characterized in that interposed between the mounted object 9.

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