JP2016007594A - Discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-pulse type discharge device capable of suppressing sedimentation of particles contained in a liquid resin.SOLUTION: In a discharge device for discharging a liquid material 12 stored in a syringe 11 by a pressure of air pulse applied from a nozzle 15, including a stirrer 1641 for stirring the liquid material in the syringe, kinetic energy of the air pulse is converted into rotary motion energy by an air turbine mechanism comprising a rotor part 16 attached on the prolongation of a shaft 163 of the stirrer, to thereby rotate the stirrer.

Description

  The present invention relates to an air pulse type discharge device used for discharging a liquid material in which solid particles filled in a syringe are dispersed. In particular, the discharge is capable of suppressing non-uniformity in the particle concentration of the liquid material that occurs over time. Relates to the device.

  The air pulse type discharge device discharges a liquid material contained in a syringe in a fixed amount by supplying air with controlled supply pressure and time to the syringe. FIG. 14 shows an outline of an air pulse type discharge device. A liquid material 72 is accommodated in the syringe 71, and an air pulse generator 77 for supplying an air pulse and the syringe 74 are connected via an air connector 75 and an air tube 76 provided on the syringe cap 74. An air pulse generator 77 generates an air pulse from the pressurized air supplied from the air source 78 via the air tube 76 and supplies the air pulse into the syringe. The liquid material 72 is discharged from the syringe 71 by the pressure of the air pulse being applied to the liquid surface of the liquid material 72 in the syringe.

  When the liquid material 72 is an adhesive or a coating agent containing particles 73 having a specific gravity different from that of the liquid, it is necessary to discharge the liquid material 72 while keeping the particle concentration constant. However, the particles 73 inside the liquid material 72 begin to settle downward with the lapse of time due to the difference in specific gravity, and accumulate at the tip of the syringe to generate a sedimented portion of the particles. As a result, the particle concentration of the liquid material 72 becomes non-uniform, and in the continuous discharge process during production, there is a difference in quality at the beginning and end of the lot.

  The dispersibility of the particles 73 contained in the liquid material 72 changes with time, but the time to settle largely depends on the viscosity of the resin material 72. If the viscosity is high, the time to settle becomes long. In many common liquid materials, the viscosity decreases as the temperature increases. Therefore, in order to suppress unevenness in particle concentration, the liquid material stirred using a large-capacity stirring tank is subdivided into small syringes equipped with a temperature controller, and temperature control is performed to maintain a low temperature. While suppressing the decrease in viscosity by applying, treatment such as use immediately in the discharge process is performed.

  Furthermore, an apparatus for performing discharge while stirring the resin material and particles in a syringe more actively has been studied. For example, as an impeller rotation drive mechanism of a magnet pump that is already generalized as a corrosion-resistant pump or an explosion-proof pump, as a stirring device that rotates a stirring bar installed in a liquid material without providing a drive unit inside the stirring layer, A method in which a drive side magnet rotor is disposed outside the sealed container, a driven side magnet rotor having a stirrer is disposed inside the sealed container wall, and the stirrer is rotated in accordance with the rotating magnetic field generated by the drive side magnet rotor. There is. Attempts have been made to incorporate this method into a discharge device and stir the resin material.

  As an example of a discharge device provided with the stirring device, there is a device of Patent Document 1. Patent Document 1 discloses a discharge device including a container, a stirrer, and a stirrer rotating unit that rotates the stirrer by a magnetic force. The stirrer is disposed at the bottom of the container and includes a rotating body. A discharge device is disclosed in which the child rotating means is disposed below the bottom of the container or along the bottom of the outer peripheral surface of the container.

  Another example is the apparatus disclosed in Patent Document 2. In Patent Document 2, a stirrer having a magnet, a stirrer holding mechanism that positions the stirrer by applying a magnetic force to the stirrer from the side, and a rotation mechanism that rotates the stirrer holding mechanism, There is disclosed a discharge device provided with a stirrer characterized in that the stirrer is rotated by rotating a stirrer holding mechanism by a rotating mechanism.

JP 2005-120956 A JP 2013-158733 A

  In the apparatus of Patent Document 1, since the stirrer arranged at the bottom of the container is rotated by a magnetic force from below the container, it is necessary to dispose the stirrer rotating means outside the bottom of the container. For this reason, the periphery of the discharge port becomes complicated, the cylinder diameter of the container increases, and the capacity increases. For this reason, the dead volume is increased, and a discharge amount error is likely to occur in a work (object to be coated) with a small coating amount. Furthermore, due to the space capacity occupied by the stirring bar rotating means, there is a concern that contact and interference may occur depending on the shape of the workpiece.

  On the other hand, in the apparatus of Patent Document 2, since the stirrer rotating means surrounds the side surface of the container as a rotating body, the heat exchanger of the temperature control apparatus provided to keep the viscosity of the liquid material in the container constant. Cannot be attached to the container. This may become a bottleneck for stable discharge when a highly viscous liquid material whose viscosity changes with temperature is used.

Furthermore, both the apparatus of Patent Document 1 and the apparatus of Patent Document 2 require a separate electric motor as a drive source for the actuator for rotating the drive side magnet rotor as the stirring bar rotating means, and the discharge device is large. It has become.

  The present invention provides a liquid resin stirring means that does not require any special drive source while controlling the viscosity of the liquid resin by attaching a heat exchanger of a temperature control device to the container. It is an object of the present invention to provide a discharge device capable of suppressing sedimentation of particles contained in the container.

  In order to achieve the above object, according to the first aspect of the present invention, the liquid material stored in the syringe is discharged by the pressure of the air pulse supplied from the air tube connected to the upper end opening of the syringe. A discharge device comprising a stirrer in the syringe, the stirrer being held by a shaft supported by a bearing on a coaxial center line with respect to the outer cylinder of the syringe, and a rotor attached to an upper end of the shaft An air turbine mechanism that includes a portion between the air flow path from when the air pulse acts as an applied pressure to the liquid surface of the liquid material in the syringe from the air supply port of the air tube. The air turbine mechanism is rotated by using the air pulse as a working fluid, and the rotor is rotated to rotate the stirrer. Preparative With ejection apparatus wherein, without separately providing a power for stirrer drive, it is possible to suppress the precipitation of the contained particles in the liquid resin.

  In order to achieve the above object, according to a second aspect of the present invention, the rotor section includes an impeller in which a plurality of spiral flow paths are formed, and a flow installed at the center of the impeller. The air turbine mechanism includes a nozzle that is connected to the air tube and ejects air to the flow path guide member, and the rotor portion. By setting it as the discharge apparatus of Claim 1, even when the flow velocity of the air pulse supplied from an air tube is low, a stirring bar can be made to raise rotational force.

  In order to achieve the above object, according to the invention described in claim 3 of the present invention, the impeller is a one-side open type in which one of the upper and lower sides is open with respect to the shaft, and the flow path is opened. The discharge device according to claim 1 or 2, wherein the discharge device according to claim 1 or 2 has a curved bottom surface that is concave toward the surface, thereby reducing energy loss with respect to the flow of air discharged from the impeller. It is possible to suppress a decrease in function as a presser for the liquid material inside the syringe.

  In order to achieve the above object, according to the invention described in claim 4 of the present invention, the rotor portion is installed at the upper end of the shaft protruding from the upper end opening of the syringe, and is immersed in the liquid material in the syringe. The discharge device according to any one of claims 1 to 3, wherein the discharge device according to any one of claims 1 to 3 is characterized in that only the part of the stirrer and the shaft is arranged, so that the discharge device according to the present invention can be realized with a simple structure.

  In order to achieve the above object, according to a fifth aspect of the present invention, the air turbine mechanism is housed in a bearing holding cylinder that holds a bearing for supporting a shaft, and the bearing holding cylinder is The stirrer installed at one end of the shaft protruding in the direction of the lower end discharge port of the syringe outside the bearing holding cylinder is accommodated in the syringe, and it is immersed in the liquid material in the syringe to hold the stirrer and the bearing It is arranged with only a part of the shaft that protrudes outside the cylinder and the bearing holding cylinder, and as a pusher that acts on the liquid level of the liquid material, it can slide in the gap between the bearing holding cylinder and the inner wall surface of the syringe The discharge device according to any one of claims 1 to 3, wherein the plunger is provided, so that the liquid resin has a high viscosity even when the viscosity of the liquid resin is high. To reduce adhesion remainder of the liquid material on the wall of di-, make it possible to maintain a uniform pressing force to the liquid surface, it is possible to reduce the ejection failure.

  In order to achieve the above object, according to a sixth aspect of the present invention, a heat exchanger of a temperature control device is mounted so as to surround the side surface of the syringe. By using the discharge device according to claim 6, temperature control can be performed to keep the viscosity of the liquid material constant, and in particular, in the case of a high-viscosity liquid material in which the viscosity is likely to change depending on the temperature, it is stable. Allows discharge.

  The discharge device according to the present invention uses an air pulse used for air pressure feeding at the time of discharge as a drive source of the rotary actuator, and does not require a dedicated power. In the discharge process of a liquid material in which particles are mixed, the particles for each discharge Variations in density can be suppressed.

FIG. 1 shows an outline of a discharge apparatus 1 according to an embodiment of the present invention, and is a structural view partially cut in cross section. FIG. 2 (a) is an excerpt of the rotor portion 16 and its peripheral members of the discharge device 1, which is the main part of the present invention, and shows a part of it as a cross section, and a partial view explicitly adding the flow of air pulses in this range. FIG. 2B is a cross-sectional view taken along the line AA ′ of the rotor portion 16 in FIG. FIG. 3 is a perspective view of the rotor portion 16 as viewed from below. 4A and 4B are projection views showing the shape of the rotor section 16, FIG. 4A being a plan view seen from above, and FIG. 4B being a plan view seen from below. 5A and 5B show the rotor holding member 13 used in the discharge device 1. FIG. 5A is a plan view, and FIG. 5B is a BOB 'sectional view in FIG. 5A. FIG. 6 is a plan view of the rotor portion as viewed from below, FIG. 6 (a) shows an example in which an impeller having two flow paths provided on a rotation axis is combined, and FIG. 6 (b) shows a rotation of the flow path. The example which combined the impeller provided in four places to the axis | shaft object is shown. FIG. 7 is a plan view of the rotor portion as viewed from below, and shows an example in which an impeller provided with two speed control flow paths for the rotation axis is provided separately from the flow path. FIG. 8 is a partial view showing an example in which a part is shown as a cross section and the gap between the nozzle 15 and the nozzle insertion port 1621 is sealed. FIG. 9 shows an outline of a discharge apparatus 2 which is another embodiment according to the present invention, and is a structural view partially showing a cross section. FIG. 10 is a partial view in which the rotor part 26 of the discharge device 2 and its peripheral members are extracted, a part thereof is shown as a cross section, and the flow of air pulses in this range is explicitly written. FIG. 11 shows an example of the shape of an annular member for fixing a bearing holding cylinder to a conduit used in the discharge device 2, FIG. 11 (a) is a plan view, and FIG. 11 (b) is C in FIG. 11 (a). It is -C 'sectional drawing. FIG. 12 shows an example of the shape of the plunger 29 used in the discharge device 2, wherein (a) is a plan view and (b) is a D-D ′ sectional view. FIG. 13 is a schematic view showing a state in which a resin mixed with a phosphor in the resin sealing step of the white LED device 3 is injected using the discharge device 1 according to the present invention. FIG. 14 is a schematic view showing a conventional air pulse discharge device.

  The discharge device according to the present invention has been made in consideration of the above-mentioned problems, and particles mixed in a liquid material by rotating a stirring bar provided in a syringe by an air turbine mechanism that converts an air pulse into a rotational motion as a working fluid. It is characterized by suppressing the sedimentation of water.

(First embodiment)
FIG. 1 shows an outline of a discharge device 1 which has realized a discharge device according to the present invention with a simple configuration as a first embodiment, and is a structural view partially showing a cross section.

  The discharge device 1 includes a syringe 11 that stores a liquid material 12, a rotor holding member 13 that is installed so as to sandwich a flange portion 112 provided at an upper end opening of the syringe 11 by a flange joint 14 and a loose flange 141, A bearing 131 attached to the center of the rotor holding member 13, a shaft 163 supported by the bearing 131 and disposed on the coaxial center line with respect to the outer cylinder of the syringe 11 in the syringe 11, and attached to one end of the shaft 163. A rotary header 164 disposed near the discharge port 111 at the lower end of the syringe 11, a plurality of stirrers 1641 provided in the rotary header 164, and a channel guide installed at the tip of the shaft 163 protruding outside the syringe 11. The rotor portion 16 formed by the member 162 and the impeller 161, and the flange joint 1 A nozzle 15 held in a conical truncated nozzle insertion port 1621 provided in the flow path guide member 162 while maintaining a certain gap so that the tip is coaxial and the wall surface does not contact; The air pipe connector 171 provided at the air suction port of the nozzle 15 and the air tube 17 connecting the air pipe connector 171 and an air pulse generator (not shown). In the following description, the direction of the air tube 17 is described as an upward direction and the direction of the discharge port 111 is described as a downward direction when viewed from the front in FIG.

  FIG. 2A shows an excerpt of the rotor 16 of the discharge device 1 and its peripheral members, which are the main part of the present invention, and shows a part of it as a cross section. The air flow in this range is explicitly shown as a1 to a4. FIG. 2 (b) is a cross-sectional view taken along line AA ′ of the rotor portion 16. FIG. 3 is a perspective view of the rotor portion 16 as viewed from below. 4A and 4B are projection views showing the shape of the rotor portion 16, wherein FIG. 4A is a plan view seen from above, and FIG. 4B is a plan view seen from below.

  As shown in FIG. 4B, the rotor portion 16 is configured by a combination of a flow path guide member 162 and an impeller 161, and the impeller 161 is connected to an air supply port 1623 provided in the flow path guide member 162. A spiral channel 1611 is provided as shown. Further, the impeller 161 is a one-side open type in which the lower side is open, and as shown in FIG. 3, the channel 1611 has a curved bottom surface that becomes concave downward in the axial direction. The impeller 161 is made of a lightweight member in order to keep the starting torque low. For example, the impeller 161 is made by powder additive manufacturing using high-strength plastic such as nylon resin.

  FIG. 5 is a plan view of the rotor holding member 13. The center has a round hole 133 in which the bearing 131 is installed, and a plurality of vent holes 132 are arranged so as to surround the round hole 133. The flange portion 112 has a plurality of through holes 134 for fastening screws together with the flange joint 14 and the loose flange 141 described above. Although not shown, a sealing material such as an O-ring may be inserted between the flange joint 14 and the rotor holding member 13 or between the rotor holding member and the loose flange 141 as necessary.

  The bearing 131 uses a bush type slide bearing formed of a self-lubricating resin, but a small ball bearing or the like may be used.

  The two stirring bars 1641 attached to the rotating shaft object on the inverted conical portion of the bottom surface of the rotary header 164 and the bottom surface of the rotary header 164 installed at the lower end of the shaft 163 are not limited to this configuration. The number of the stirring bars 1641 may be increased. Furthermore, the rotary header 164 may be omitted, and a plurality of blades may be provided as a stirrer with the shaft 163 interposed therebetween.

  In the configuration of the discharge device 1 described above, the combination of the nozzle 15 and the rotor unit 16 forms an air turbine mechanism that diverts the kinetic energy of the air pulse supplied through the air tube 17 and converts it into the rotational kinetic energy of the shaft 163. To do.

Here, the air turbine mechanism in the discharge device 1 and the action of air related to the discharge mechanism will be described below using the air flows (hereinafter referred to as air flows) a1 to a4 appended in FIG.
(1) The air flow a <b> 1 supplied through the air tube 17 to press the liquid material 12 is jetted into the recess 1622 of the flow path guide member 162 while increasing the flow velocity by the nozzle 15.
(2) After the air flow a1 is ejected from the nozzle 15, it collides with the conical shape portion 1624 provided on the bottom surface of the concave portion 1622 and is diverted to flow along the bottom surface of the concave portion 1622, and a part of the air flow a1 is directed to the impeller 161. The air flow a2 toward the air supply port 1623 is obtained.
(3) The air flow a2 is supplied to the impeller 161 from the air supply port 1623 and passes through the flow path 1611 while applying impulsive force to the wall surface of the spiral (described later) flow path 1611. The stirrer 1641 is rotated by acting to add. Since the flow path 1611 has a curved bottom surface that is concave in the axial direction, the flow through the flow path 1611 is changed from a radially outward direction to an axially downward direction while suppressing unnecessary energy loss. It becomes flow a3.
(4) After the air flow a3 is discharged from the impeller 161, the air flow a3 passes through the vent hole 132 provided in the rotor holding member 13 and becomes the air flow a4 toward the syringe 11, thereby increasing the pressure in the space in the syringe 11. It acts as a pusher to the liquid material 12 as pressurized air. It should be noted that after the air pulse is discharged from the impeller 161 as the air flow a3, the speed rapidly decreases, and in the state reaching the air flow a4, it acts only to increase the pressure in the space in the syringe 11 and the flow velocity is lost.

  Thereby, in the discharge device 1, not only the air flow by the air pulse supplied from the air pulse generator is used to perform the function of a pusher for discharging the liquid material 12, but also the stirrer 1641 is swung, Therefore, the liquid material 12 is also used as a working fluid to stir the liquid material 12.

  In many cases, the rotor portion 16 does not rotate greatly because it is affected by the viscosity of the liquid material 12. However, as described above, the main object of the present invention is to suppress variation in particle concentration at each discharge in the continuous discharge process when the liquid material 12 contained in the syringe 11 is mixed with the particles 121. This is to realize a possible discharge device, and it is sufficient that a slight flow occurs in the liquid material 12 for each air pulse, and the swirl angle of the stirrer 1641 may be small in one discharge by the air pulse. For example, when the liquid material 12 is a silicone resin and contains phosphor particles, even if the resin viscosity is low and the sedimentation is the fastest, there is a margin until the variation in particle concentration at each discharge starts to become noticeable after the liquid material 12 is set in the syringe 11. The time is about 10 minutes. Therefore, in the continuous discharge process, if the discharge interval is sufficiently shorter than the margin time, the flow of the liquid material 12 continuously occurs in the syringe 11 and the settling of the phosphor is suppressed.

  As shown in FIG. 4 (b), the flow path 1611 provided in the impeller 161 is not limited to being arranged at three locations on the rotating shaft target, but the viscosity of the liquid material 12, the particle size of the particles, and the like. Accordingly, it may be appropriately changed to obtain an optimum rotation. 6A and 6B are plan views of the rotor portion 16 as viewed from below. FIG. 6A shows an example in which an impeller 161a provided with two channels 1611 on the rotation axis is combined, and FIG. The example which combined the impeller 161b provided in four places to the object is shown. Although the number of the flow paths 1611 installed in this way is not limited, it is preferable that the arrangement is a rotation axis target in order to suppress the occurrence of blurring of the shaft 163.

  Furthermore, in order to adjust the rotational force, an air vent channel may be provided in the impeller 161. FIG. 7 is a plan view of the rotor portion 16 as viewed from below, and shows an example in which an impeller 161c provided with two speed control flow channels 1612 on the rotation axis object is combined with the flow channel 1611. The speed adjusting channel 1612 has a triangular shape or the like that opens outward in the radial direction so as to allow the air flow to pass without receiving impulsive force.

  Further, when the kinetic energy coupling loss due to the gap between the nozzle 15 and the nozzle insertion port 1621 cannot be ignored, the nozzle 15 may be supported as a rotating shaft by a seal-type bearing or the like provided on the upper side of the rotor portion 16. FIG. 8 shows an example in which the gap between the nozzle 15 and the nozzle insertion port 1621 is sealed. The nozzle 15 is supported by a bearing 1613 fixed to the upper surface of the impeller 161. In order to secure the fit with the bearing 1613, an adapter 151 corresponding to the tip shape of the nozzle 15 is attached to the nozzle 15. The adapter 151 is preferably an elastic structure that allows displacement between the nozzle 15 and the shaft 163, that is, deflection of the shaft, and is made of, for example, rubber or leather.

(Second embodiment)
In the discharge device 1 described as the first embodiment, when the viscosity of the liquid resin 121 is high, the residual amount of the liquid material 12 on the wall surface of the syringe 11 is increased, and the level difference is partially generated in the liquid level. There is. This eventually causes air penetration in the liquid resin 121 and may lead to ejection failure. Therefore, a discharge device 2 that can press the liquid surface uniformly by attaching a plunger will be described below as a second embodiment with reference to FIGS. 9 to 12.

  FIG. 9 shows an outline of a discharge device 2 as a second embodiment using the present invention, and is a structural view partially showing a cross section. In the discharge device 2, a loose flange 241 and a flange joint 24 are fastened so as to sandwich a syringe 21 that stores the liquid material 12 and a flange portion 212 of the syringe 21, and the flange joint 24 passes through the flange joint 24 at the center. A conduit 251 that extends along the central axis of the syringe 21 and extends to the inside of the syringe 21, and has a nozzle 25 formed at the lower tip, and a conduit 251 that is exposed from the upper surface of the flange joint 24. An air pipe connector 171 connected to the upper end of the air pipe, an air tube 17 connected by the air pipe connector 171 and piped from an air pulse generator (not shown), and two pipes attached to the conduit 251. Two annular members 282, a bearing holding cylinder 28 fixed by the annular member 282, and the bellows. A plunger 29 that slides in the space between the ring holding cylinder 28 and the syringe 21, a seal-type bearing 281 attached to the lower end of the bearing holding cylinder 28, and supported by the bearing 281 downward from the bearing holding cylinder 28 A shaft 263 extending to the bottom, a rotary header 164 attached to the lower end of the shaft 263 and disposed near the discharge port 211 of the syringe 21, a plurality of agitators 1641 provided in the rotary header 164, and the bearing holding The flow path guide member 262 installed at the tip of the shaft 263 located inside the cylinder 28 and the rotor portion 26 formed by the impeller 261 are configured.

  In addition, a frustoconical nozzle insertion port 2621 is provided on the upper surface of the flow path guide member 262, and the nozzle 25 is inserted coaxially with a constant interval so as not to contact.

  FIG. 10 is a partial view in which the rotor portion 26 of the discharge device 2 and its peripheral members are extracted, a part thereof is shown as a cross section, and the air flow in this range is explicitly written as a21 to a24. In addition to the nozzle insertion port 2621, the flow path guide member 262 is provided with a concave portion 2622 and a conical portion 2624 that function as a flow divider of the air flow ejected from the nozzle 25, and an air supply port 2623 to the impeller 261. The configuration of the flow path guide member 162 in the discharge device 1 is the same. The impeller 261 combined with the flow path guide member 262 is provided with a flow path 2611 having a plurality of concave curved bottom surfaces, like the impeller 161 in the discharge device 1, but the impeller 261 is one side whose upper side is open. This is an open type, and is different from the impeller 161 in that the curved bottom surface of the channel 2611 faces upward in the axial direction.

  Since the bearing 281 is used by being immersed in the liquid material 12, it is required to ensure confidentiality. Accordingly, it is not preferable to use a slide bearing or the like in which a clearance exists in the fit, and a seal-type small ball bearing is used.

  FIG. 11 shows an example of the shape of the annular member 282 that fixes the bearing holding cylinder 28 to the conduit 251. (A) is a top view, (b) is C-C 'sectional drawing. The annular member 282 is a plate member having a circular outer periphery similar to the spoke wheel of the wheel, and surrounds the round hole 2821 for fitting the conduit 251 to the center of the circular outer periphery at the center and the periphery of the round hole 2821 for obtaining ventilation. A plurality of fan-shaped ventilation holes 2822 are provided. As shown in FIG. 10, since the shaft 263 coaxially arranged with the conduit 251 is held by the bearing 281 held at the lower end of the bearing holding tube 28, the conduit 251 and the bearing holding tube 28 are sufficient. It is required to ensure the coaxiality. Therefore, it is necessary to reduce the concentricity between the outer periphery of the annular member 282 and the round hole 2821, and the annular member 282 is preferably formed by cutting using a resin plate material for cutting or a metal plate material.

  Since the outer side surface of the bearing holding cylinder 28 becomes a sliding portion with the plunger 29, the bearing holding cylinder 28 has a hardness compared to the material used for the plunger 29, and may be made of a resin material having self-lubricating properties. Although it is good, when it is necessary to use a hydrocarbon solvent at the time of washing after use, usable materials are limited to fluororesins having poor adhesion. Therefore, it is preferable that the bearing holding cylinder 28 is made using a pipe made of a metal material such as stainless steel while paying attention to surface finishing such as buffing. Furthermore, when improvement in abrasion resistance for the particles 121 contained in the liquid resin 12 is required, surface treatment such as DLC coating may be performed.

  FIG. 12 shows an example of the shape of the plunger 29. (A) is a top view, (b) is D-D 'sectional drawing. The plunger 29 is made of an elastic resin material, and is a ring-shaped member that is slidably mounted between the bearing holding cylinder 28 and the syringe 21. The plunger 29 is provided with a through-hole 291 for passing the bearing holding cylinder 28 in the center. Further, the outer diameter of the plunger 29 is made slightly larger than the inner diameter of the syringe 21, and the hole diameter of the central through hole 291 is made slightly smaller than the outer shape of the bearing holding cylinder 28. Further, in order to prevent the plunger 29 from being pushed back above the syringe 21 by the action of the compression reaction force caused by the discharged liquid material 12, a plurality of slits are formed on the outer peripheral surface in parallel with the axial direction of the syringe 21. 292 is also provided with a plurality of slits 293 in parallel with the axial direction on the inner peripheral surface of the through-hole 291 so that pressure is discharged upward.

  When there is no plunger 29 and the viscosity of the liquid material 12 is high, the residual amount of the liquid material 12 is increased on the wall surfaces of the syringe 21 and the bearing holding cylinder 28, and the level difference is partially generated in the liquid level. By mounting the plunger 29, the liquid level can be pressed uniformly.

Here, the air turbine mechanism in the discharge device 2 and the action of air by the air pulse related to the discharge mechanism will be described below using the air flow (hereinafter referred to as air flow) a21 to a24 appended in FIG.
(1) The air flow a <b> 21 supplied via the air tube 17 to press the liquid material 12 is jetted to the concave portion 2622 of the flow path guide member 262 while increasing the flow velocity by the nozzle 25.
(2) After the air flow a21 is ejected from the nozzle 25, it collides with the conical shape portion 2624 provided on the bottom surface of the concave portion 1622 and becomes a flow along the bottom surface of the concave portion 2622, and a part thereof is directed to the impeller 261. The air flow a22 toward the air supply port 2623 is obtained.
(3) The air flow a22 is supplied to the impeller 261 from the air supply port 2623 and passes through the flow path 2611 while applying impulsive force to the wall surface of the flow path 2611, thereby acting to apply a rotational motion r2 to the shaft 263, The stirrer 2641 is turned. Since the flow path 2611 has a curved bottom surface that is concave upward in the axial direction, the flow through the flow path 2611 is directed upward in the axial direction from outward in the radial direction while suppressing unnecessary energy loss. The air flow changes a direction a23.
(4) After the air flow a23 is discharged from the impeller 261, the air flow a23 passes through the syringe holding cylinder 28 upward and becomes a flow a24 toward the syringe 21, and becomes pressurized air that increases the pressure in the space in the syringe 21. The plunger 29 is pushed down. In addition, after the air by an air pulse is discharged | emitted from the impeller 261 as the air flow a23, a speed | rate falls rapidly, and in the state which reaches the air flow a24, it acts only to raise the pressure of the space in the syringe 21, and the flow velocity is lost. .

  Thereby, in the discharge device 2, not only the air pulse supplied from the air pulse generator is used to press the plunger 29 for discharging the liquid material 12, but also the stirrer 2641 is swung, thereby the liquid material 12. Is also used as a working fluid.

  FIG. 13 schematically shows a state in which a resin mixed with a phosphor in the resin sealing step of the white LED device 3 is injected using the discharge device 1 according to the present invention. In the white LED device 3, a plurality of blue LED elements 33 are placed in a cavity 352 formed by a base 35 and a frame body 351, and the cavity 352 is sealed with a sealing resin 34 mixed with a yellow phosphor. It is created by sealing. The air pulse to the discharge device 1 is supplied through the air tube 37 as the air pulse decompressed by the air pulse generator 36 from the air supplied from the air source 38. A heat exchanger 39 of a temperature control device (not shown) is attached to the syringe of the discharge device 1, and the viscosity of the liquid material 32 is managed. The discharge device 1 uses the kinetic energy of the air pulse for pressing the liquid material 12 and converts it into the rotational kinetic energy of the rotary header 164 by the internal air turbine mechanism, thereby flowing the liquid material 32 for each shot of the air pulse. Thus, it is possible to perform discharge while suppressing sedimentation of the particles 321 dispersed in the liquid material 32.

  Since the cavity 352 of the white LED device 3 is shallow and has a wide shape, and resin sealing is achieved by continuous ejection, conventionally, the phosphor concentration variation of the resin locally occurs, thereby The occurrence of chromaticity unevenness was inevitable, and the yield was lowered in the quality inspection. By performing resin sealing by continuous ejection using the ejection device according to the present invention, variation in phosphor concentration is suppressed, and chromaticity unevenness of the white LED device 3 is reduced.

1, 2 Discharge device 3 White LED device 11, 21 Syringe 12, 32 Liquid material 13 Rotor holding member 14, 24 Flange joint 15, 25 Nozzle 16, 26 Rotor portion 17, 37 Air tube 28 Bearing holding cylinder 29 Plunger 33 Blue LED Element 34 Sealing resin 35 Base 36 Air pulse generator 38 Air source 111, 211 Discharge port 112, 212 Syringe flange part 121, 321 Particle 131 Bearing 132 Vent hole 133 Round hole 134 Through hole 141, 241 Loose flange 151 Adapter 161 , 261 Impeller 162, 262 Flow path guide member 163, 263 Shaft 164, 264 Rotating header 171 Air piping connector 251 Conduit 281 Bearing (seal type)
282 Annular member 291 Through hole 292, 293 Slit 351 Frame 352 Cavity 1611, 2611 Impeller flow path 1612 Impeller speed control flow path 1621, 2621 Nozzle insertion port 1622, 2622 Impeller recess 1623, 2623 Impeller air supply port 1624 , 2624 Cone-shaped portion 1641, 2641 Stirrer

2821 Round hole 2822 Fan-shaped vent

Claims (6)

A discharge device that discharges the liquid material stored in the syringe by the pressure of an air pulse supplied from an air tube connected to the upper end opening of the syringe,
A stirrer is provided in the syringe,
The stirrer is held by a shaft supported by a bearing on a coaxial center line with respect to the outer cylinder of the syringe,
An air turbine mechanism including a rotor portion attached to an upper end portion of the shaft;
The air turbine mechanism is located between air flow paths from when the air pulse acts as an applied pressure to the liquid surface of the liquid material in the syringe from the air supply port by the air tube,
The discharge device according to claim 1, wherein the air turbine mechanism rotates the rotor portion by using the air pulse as a working fluid, whereby the stirrer rotates. The rotor portion includes an impeller in which a plurality of spiral flow paths are formed;
It is composed of a channel guide member installed at the center of the impeller,
The discharge device according to claim 1, wherein the air turbine mechanism includes a nozzle that is connected to the air tube and ejects air to the flow path guide member, and the rotor portion.   The impeller is a one-side open type in which one of the upper and lower sides is open with respect to the shaft, and the flow path has a curved bottom surface that is concave toward the opening direction. The ejection device according to claim 1 and claim 2.   The said rotor part is installed in the upper end of the shaft which protruded from the upper-end opening part of the said syringe, and only the said stirring element and a part of shaft are immersed in the liquid material in a syringe, The arrangement | positioning characterized by the above-mentioned. Item 4. The discharge device according to Item 3. The air turbine mechanism is housed in a bearing holding cylinder that holds a shaft supporting bearing,
The bearing holding cylinder is housed in the syringe together with a stirrer installed at one end of a shaft that protrudes toward the lower end discharge port of the syringe outside the bearing holding cylinder,
Immersion in the liquid material in the syringe is an arrangement that is only a part of the shaft and the bearing holding cylinder protruding outside the stirring bar and the bearing holding cylinder,
The discharge according to any one of claims 1 to 3, wherein a plunger capable of sliding in a gap between the bearing holding cylinder and the syringe inner wall surface is provided as a pusher acting on a liquid surface of the liquid material. apparatus.   The discharge device according to any one of claims 1 to 6, wherein a heat exchanger of a temperature control device is attached so as to surround a side surface of the syringe.

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