JP2010137127A - Liquid agent discharge apparatus and liquid agent discharge method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve handleability of a liquid agent discharge apparatus. <P>SOLUTION: The liquid agent discharge apparatus for discharging the viscous liquid agent L toward a base material K to be a material to be printed is provided with: a liquid agent intermittent discharge means for intermittently discharging the liquid agent L toward the base material K from a nozzle hole 13 provided in a container 11 by a laminate type piezoelectric element 14 and a plunger 18; and a continuous discharge means for continuously discharging the liquid agent L from the nozzle hole 13c toward the base material K into the container 11 while continuously supplying the stored liquid agent L into the container by continuously impressing air having a prescribed pressure to a liquid agent storing tank 31 in which the liquid agent L is stored. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides an intermittent discharge mode in which a liquid agent is intermittently discharged from a nozzle hole based on print data and a continuous discharge in which the liquid agent is continuously discharged from the nozzle hole when discharging a viscous liquid agent toward a printing material. The present invention relates to a liquid agent discharge apparatus and a liquid agent discharge method that can be selectively switched to a discharge mode.

  In general, a liquid agent discharge device that discharges a liquid agent with viscosity from a nozzle hole provided in the container toward a substrate while pressing the liquid agent with a plunger or piston prints print data on demand. It is used a lot because it can.

  For example, a liquid agent discharge apparatus that discharges viscous ink is applied to an ink jet printing apparatus, and a liquid agent discharge apparatus that discharges viscous cream solder is applied to a printed wiring board and the like. Liquid agent discharge devices that discharge adhesives are applied in various fields.

  As an example of this type of liquid agent discharge device, when a droplet of a viscous medium such as a solder paste is ejected onto a substrate such as an electronic circuit board, a piezoelectric actuator and a plunger are used for the liquid agent discharge method, and the liquid agent supply method There is an injection device that can discharge a liquid agent intermittently from a nozzle by using a screw pump (see, for example, Patent Document 1).

  As another example of the liquid agent discharge device, when a small amount of liquid or viscous material is distributed on a substrate such as a printed circuit board from a cylinder filled with liquid or viscous material, a valve shaft and a compression spring are used as the liquid agent discharge method. There is a device for dispensing a small amount of material that can intermittently eject a liquid agent from a nozzle by using an air solenoid and a cylinder in which air pressure is applied to the liquid agent supply system (see, for example, Patent Document 2).

  FIG. 9 is a longitudinal sectional view showing the injection device of the first conventional example. FIG. 10 is a longitudinal sectional view showing an apparatus for dispensing a small amount of material according to Conventional Example 2.

  The injection device 100 of Conventional Example 1 shown in FIG. 9 is disclosed in Patent Document 1 below, and the small amount material dispensing device 200 of Conventional Example 2 shown in FIG. This is disclosed in Document 2, and will be described briefly with reference to Patent Documents 1 and 2.

  First, in the liquid agent injection assembly 100 in the injection device of Conventional Example 1 shown in FIG. 9, the piezoelectric actuator 102, the plunger 103, the cup-shaped spring 104, and the injection nozzle 105 are arranged on the left side of the assembly housing 101 in the drawing. Solder paste (not shown) is sprayed into the injection chamber 107 by a rotary feed screw 106 which is provided in order from the upper side to the lower side along the center line and which is rotatably provided in the assembly housing on the right side in the figure. It is configured to send out.

  When an impact pulse is applied to the piezoelectric actuator 102, the plunger 103 moves to the liquid discharge position against the cup-shaped spring 104 as the piezoelectric actuator 102 is displaced in the liquid discharge direction. The solder paste sent out into 107 is intermittently discharged from the nozzle hole 105a of the injection nozzle 105 toward the outside.

  Next, in the small-quantity material dispensing apparatus 200 of Conventional Example 2 shown in FIG. 10, a long valve shaft 202 is provided in the central portion of the housing 201 so as to be movable toward the nozzle 203.

  A support structure 205 is fixed to the intermediate portion of the valve shaft 202 and a cylindrical seal element 204 is fixed. Further, a spring retainer 206 is fixed above the support structure 205. A compression spring 208 extends between a spring adjustment component 207 provided at an upper portion of the shaft 202.

  In addition, a pneumatic solenoid 209 and a tube 210 connected to a compressed air source (not shown) are provided on the left side of the housing 201 in the drawing, and a cylinder is formed by taking compressed air from the tube 210 into the air inlet 211. The valve shaft 202 is moved up in the direction opposite to the liquid discharge direction against the urging force of the compression spring 208 by being fed into the air chamber 212 below the cylindrical seal element (diaphragm) 204.

  Further, the cylinder 215 is filled by applying a certain pneumatic pressure into the cylinder 215 via the air tube 214 from the pressure adjusting device 213 connected to the low pressure air source (not shown) on the right side of the housing 201. The liquid or viscous material (not shown) is pushed out to the flow path 216 through which the valve shaft 202 enters.

When the solenoid valve by the pneumatic solenoid 209 is operated, the air in the air chamber 212 provided under the cylindrical seal element (diaphragm) 204 is discharged through a discharge passage (not shown) provided in the air solenoid 209. Is done. At the same time, the valve shaft 202 is moved to the liquid agent discharge position by the urging force of the compression spring 208, and the liquid or viscous material pushed out to the flow path 216 is intermittently discharged from the nozzle 203 toward the base material 217. Yes.
JP-T-2005-532906 Japanese Patent No. 3506716

  By the way, in the liquid agent injection assembly 100 in the injection device disclosed in Patent Document 1 described above, the piezoelectric actuator 102 and the plunger 103 are used for the liquid agent discharge method, and the rotary feed screw 106 is used for the liquid agent supply method. Although the liquid agent can be intermittently discharged from the nozzle 105 while adjusting the speed at which the liquid agent is supplied by the rotary feed screw 106, the rotary feed screw 106, which is a kind of screw pump, takes time to clean the liquid agent.

  On the other hand, in the apparatus 200 for dispensing a small amount of material disclosed in Patent Document 2 described above, a cylinder that uses a valve shaft 202, a compression spring 208, and an air solenoid 209 for the liquid agent discharge method, and applies air pressure to the liquid agent supply method. Although the liquid agent can be intermittently discharged from the nozzle 203 by using 215, the solenoid valve by the air solenoid 209 cannot discharge the liquid agent efficiently because of poor response performance.

  Furthermore, the liquid agent injection assembly 100 in the injection device disclosed in Patent Document 1 or the low-volume material dispensing device 200 disclosed in Patent Document 2 is applied to continuously discharge the liquid agent on the substrate on demand. When necessary, the piezoelectric actuator 102 described in Patent Document 1 or the air solenoid 209 described in Patent Document 2 must be controlled at high speed, but the piezoelectric actuator 102 and the air solenoid 209 are continuously driven at high speed. Therefore, the structure is not suitable for continuous discharge of the liquid agent.

  Therefore, when discharging a viscous liquid toward the printing material, it is possible to improve workability and print quality, and intermittent discharge mode for intermittently discharging the liquid from the nozzle hole based on the print data Another object of the present invention is to provide a liquid agent discharge apparatus and a liquid agent discharge method capable of selectively switching to a continuous discharge mode in which the liquid agent is continuously discharged from nozzle holes.

The present invention has been made in view of the above problems, and the first invention is a liquid agent discharge device that discharges a viscous liquid agent toward a printing material.
A laminated piezoelectric element that is displaced in the laminating direction with application of a drive voltage waveform;
A container having a liquid agent storage chamber for storing the liquid agent, and a nozzle hole for discharging the liquid agent stored in the liquid agent storage chamber;
It is provided in the container so as to be movable between an initial position where the liquid agent is not discharged and a discharge position where the liquid agent is discharged, and in cooperation with the displacement of the multilayer piezoelectric element, the discharge position from the initial position. A plunger that discharges the liquid agent from the nozzle hole toward the printing material while pushing the liquid agent with the movement to
A spring member for biasing the plunger back to the initial position;
A liquid storage tank for storing the liquid,
Air pressure application means for applying air having a pressure greater than atmospheric pressure into the liquid agent storage tank and pushing out the stored liquid agent into the liquid agent storage chamber by a discharge amount;
A liquid agent discharge device comprising:

In addition, the second invention is a liquid agent discharge device for discharging a viscous liquid agent toward a printing material.
Liquid agent intermittent discharge means for discharging the liquid agent intermittently from the nozzle hole provided in the container to the substrate by a laminated piezoelectric element and a plunger;
A predetermined pressure of air is continuously applied to the liquid agent storage tank for storing the liquid agent, and the stored liquid agent is continuously supplied into the container while being continuously supplied from the nozzle hole toward the substrate. Liquid agent continuous discharge means to be discharged to,
A liquid agent discharge device comprising:

The third invention is a liquid agent discharge device for discharging a viscous liquid agent toward a printing material.
Liquid agent intermittent discharge means for discharging the liquid agent intermittently from the nozzle hole provided in the container to the substrate by a laminated piezoelectric element and a plunger;
A predetermined pressure of air is continuously applied to the liquid agent storage tank for storing the liquid agent, and the stored liquid agent is continuously supplied into the container while being continuously supplied from the nozzle hole toward the substrate. Liquid agent continuous discharge means to be discharged to,
An analysis means for analyzing whether the print data is intermittent discharge mode data or continuous discharge mode data;
Intermittent discharge / continuous discharge mode selection means for switching the liquid agent intermittent discharge means and the liquid agent continuous discharge means to selectively operate according to the analysis result of the analysis means;
A liquid agent discharge device comprising:

Moreover, 4th invention is the above-mentioned liquid agent discharge apparatus of 2nd or 3rd invention,
When the liquid agent intermittent discharge means is operated, low pressure air having a value larger than atmospheric pressure is pulsed or continuously applied to the liquid agent storage tank, and the stored liquid agent is intermittently discharged by the discharge amount. When the liquid agent continuous discharge means is operated while being supplied into the container, high pressure air having a value higher than that of the low pressure air is continuously applied to the liquid agent storage tank, and the stored liquid agent is supplied. The liquid agent discharge device is characterized in that it is continuously supplied into the container.

Further, the fifth aspect of the invention relates to a liquid agent discharging means for discharging a viscous liquid agent from a nozzle hole and a substrate to be moved relative to each other in an X-axis direction and a Y-axis direction orthogonal to each other. In the liquid agent discharge method of discharging from the nozzle hole toward the substrate,
The movement trajectory of the dots by the liquid agent discharged onto the substrate is continuously zigzag in the X axis direction and the Y axis direction on the outer periphery side along the frame of the substrate and the inner side of the substrate. And separately discharging the liquid agent to the outer peripheral side of the substrate so that the liquid agent is written along the outer peripheral dot trajectory. The liquid agent discharge method characterized by the above.

  According to the above-described liquid agent discharge device of the first invention, the laminated piezoelectric element and the plunger are applied to a method of discharging a viscous liquid agent toward a printing material, and the method of supplying the liquid agent is from atmospheric pressure. Since the air pressure application system that applies large pressure air to the liquid agent storage tank is applied, the quick response of the liquid agent can be performed by the multi-layer piezoelectric element with good response. The printing efficiency is improved, the liquid agent can be stored in the liquid agent storage tank with good workability, and the liquid agent is not insufficient in the container for storing the liquid agent, which can contribute to the improvement of the reliability of the liquid agent discharge device.

  Further, according to the liquid agent discharge device of the second invention described above, when the liquid agent having viscosity is discharged toward the printing material, the liquid agent is covered from the nozzle hole provided in the container by the stacked piezoelectric element and the plunger. While intermittently discharging the liquid agent toward the printed material and applying a predetermined pressure of air continuously in the liquid agent storage tank for storing the liquid agent and continuously supplying the stored liquid agent into the container Since the liquid agent continuous discharge means that continuously discharges from the nozzle hole toward the printing material is provided, the liquid agent discharge device is made multifunctional by selectively switching between the intermittent discharge mode and the continuous discharge mode. Therefore, an easy-to-use liquid agent discharge device can be provided.

  Further, according to the above-described liquid agent discharge device of the third invention, when the liquid agent having viscosity is discharged toward the printing material, the liquid agent is covered from the nozzle hole provided in the container by the stacked piezoelectric element and the plunger. While intermittently discharging the liquid agent toward the printed material and applying a predetermined pressure of air continuously in the liquid agent storage tank for storing the liquid agent and continuously supplying the stored liquid agent into the container A liquid agent continuous discharge means for continuously discharging from a nozzle hole toward a substrate; an analysis means for analyzing whether the print data is intermittent discharge mode data or continuous discharge mode data; and a liquid agent intermittent discharge means; Since there is provided intermittent discharge / continuous discharge mode selection means for selectively operating the liquid agent continuous discharge means in accordance with the analysis result of the analysis means, the second invention described above In addition to obtaining the same effect as the effect, since the liquid agent intermittent discharge means and the liquid continuous discharge means can be automatically switched according to the print data, the usability of the liquid agent discharge device can be further improved. .

  Further, according to the above-described liquid agent discharge device of the fourth invention, in the liquid agent discharge device of the above-described second or third invention, when the liquid agent intermittent discharge means is operated, the liquid agent storage tank is operated from the atmospheric pressure. If the low-pressure air of a large value is applied in pulses or continuously and the stored liquid agent is supplied into the container by the amount of intermittent discharge, the liquid agent storage tank is operated when the liquid agent continuous discharge means is operated. Since the stored liquid agent is continuously supplied into the container by continuously applying high-pressure air having a pressure higher than that of the low-pressure air, it is stored in the liquid agent storage tank during both intermittent discharge and continuous discharge. The liquid can be reliably supplied into the container.

  Further, according to the liquid agent discharge method of the fifth invention, the liquid agent discharge means for discharging the liquid agent having viscosity from the nozzle hole and the substrate to be printed are relatively moved in the X-axis direction and the Y-axis direction orthogonal to each other. When the liquid agent is ejected from the nozzle hole toward the printed material, even if inertia force is generated when the mass of the moving member is large, the movement trajectory of the dots by the liquid material ejected on the printed material The outer periphery side of the substrate is set separately for the outer periphery dot locus along the frame and the inner periphery dot locus that is zigzag in the X axis direction and the Y axis direction inside the substrate. Since the liquid agent is continuously discharged so as to draw a stroke along the locus of the dots on the outer peripheral side, each dot on both ends in the X-axis direction (or Y-axis direction) (Or X-axis direction) To be, thereby improving the quality of the printed pattern on the outer circumferential side.

  Hereinafter, an embodiment of a liquid agent discharge apparatus and a liquid agent discharge method according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a perspective view showing a liquid agent discharge device according to the present invention. FIG. 2 is a configuration diagram showing a configuration when the liquid agent ejection assembly shown in FIG. 1 is in an initial state in the liquid agent ejection apparatus according to the present invention. FIG. 3 is a view for explaining the operation when the liquid agent ejection assembly is in the intermittent discharge mode in the liquid agent discharge apparatus according to the present invention. FIG. 4 is a view for explaining the operation when the liquid jetting assembly is in the continuous discharge mode in the liquid jetting apparatus according to the present invention. 5 (a) and 5 (b) show the intermittent discharge pattern when the liquid agent is intermittently discharged onto the substrate and the liquid agent continuously discharged onto the substrate in the liquid agent discharge device according to the present invention. It is the figure which showed typically the continuous discharge pattern when it was made to do. FIG. 6 is a waveform diagram showing drive waveforms of the piezoelectric element drive circuit, the air pump low pressure drive circuit, and the air pump high pressure drive circuit in the liquid agent discharge apparatus according to the present invention.

  As shown in FIG. 1, the liquid agent ejection device 1 according to the embodiment of the present invention is configured as a well-known ink jet printer, and a base base 2 is fixedly installed in a housing (not shown). An X-axis moving table 3 and a Y-axis moving table 4 are stacked on top of each other, and the two moving tables 3 and 4 are mutually connected by the driving force of the stepping motors 5 and 6 with the first and second encoders as will be described later. They are provided so as to be independently movable in the X-axis direction and the Y-axis direction orthogonal to each other. Further, a base material K to be printed is placed on the Y-axis moving table 4.

  At this time, the first rack 2 a 1 is integrally formed on the front side surface 2 a of the base table 2 along the X-axis direction, and the stepping motor 5 with the first encoder is mounted on the front side surface 3 a of the X-axis moving table 3. The first worm 5a is fixed to the shaft of the stepping motor 5 with the first encoder, and is horizontally engaged along the axial direction. The first worm 5a meshes with the first rack 2a1. Accordingly, when the stepping motor 5 with the first encoder is rotated forward or reverse, the X-axis moving table 3 is positioned by the encoder portion 5b of the stepping motor 5 with the first encoder by meshing the first rack 2a1 and the first worm 5a. By control, the base table 2 can be automatically moved in the X-axis direction.

  Note that nothing is attached to the front side surface 4 a of the Y-axis moving table 4.

  Further, a second rack 3b1 is integrally formed on the right side surface 3b of the X-axis moving table 3 so as to protrude along the Y-axis direction, and a stepping motor with a second encoder is formed on the right side surface 4b of the Y-axis moving table 4. 6 is attached horizontally along the Y-axis direction, and a second worm 6a is fixed to the shaft of the stepping motor 6 with the second encoder, and the second worm 6a meshes with the second rack 3b1. Accordingly, when the stepping motor 6 with the second encoder is rotated forward or reverse, the Y-axis moving table 4 is positioned by the encoder portion 6b of the stepping motor 6 with the second encoder by meshing the second rack 3b1 and the second worm 6a. By control, the base table 2 and the X-axis moving table 3 can be automatically moved in the Y-axis direction.

  Further, a liquid injection assembly 10 which is a main part of this embodiment is fixedly installed above the base material K in a housing (not shown). The liquid agent injection assembly 10 is configured such that a liquid agent L having viscosity can be discharged onto a substrate K that is movable in the X-axis direction and the Y-axis direction via the X-axis moving table 3 and the Y-axis moving table 4. ing.

  In this embodiment, the liquid agent injection assembly 10 is fixedly installed and the base material K can be moved in the X-axis direction and the Y-axis direction by the X-axis moving table 3 and the Y-axis moving table 4. Without limitation, the liquid agent injection assembly 10 is supported so as to be movable in the X-axis direction and the Y-axis direction and the base material K is fixed, or the liquid agent injection assembly 10 can be moved in the X-axis direction (or Y-axis direction). There is also a structure for supporting and supporting the base material K so as to be movable in the Y-axis direction (or X-axis direction), and the liquid material injection assembly 10 that discharges the liquid material L and the base material (substrate) K are orthogonal to each other. It is only necessary to be able to move relative to the axial direction and the Y-axis direction.

  Next, as shown in an enlarged view in FIG. 2, the above-described liquid agent injection assembly 10 is configured such that the liquid agent L is intermittently ejected from the nozzle hole 13 c onto the substrate K as described later. And a plunger 18 are applied, and an air pressure application system in which air having a pressure larger than atmospheric pressure is applied to the liquid agent storage tank is applied to the liquid agent supply system. An air pressure application method using an air pump 35 is applied to a method of continuously discharging L from the nozzle holes 13c, and can be selectively switched between an intermittent discharge mode and a continuous discharge mode based on on-demand print data. It is configured to be able to.

  Here, the configuration of the liquid agent injection assembly 10 will be described in detail. In the liquid agent injection assembly 10, the liquid agent discharge container 11 is divided into an upper case 12 and a lower case 13, and each is formed in a cylindrical shape. Both cases 12 and 13 are joined together with the upper and lower lids joined by a joining means (not shown).

  The upper case 12 has a piezoelectric element accommodation chamber 12a for accommodating a laminated piezoelectric element 14 to be described later, and has a diameter larger than the cylindrical outer peripheral surface 14a of the laminated piezoelectric element 14 and is elongated toward the lower case 13. A wire hole 12b through which the wire 16 connected to the laminated piezoelectric element 14 passes is formed on the side of the piezoelectric element accommodation chamber 12a.

  At this time, the upper case 12 is used as a fixing member for fixing one end surface 14b in the longitudinal direction of the multilayer piezoelectric element 14, and instead of the upper case 12, a housing (not shown) of the liquid agent discharge device 1 is used. A part of the piezoelectric element 14 may be used as long as it can accommodate the stacked piezoelectric element 14 without falling in the stacking direction, which is the longitudinal direction.

  On the other hand, the lower case 13 has a plunger accommodating chamber 13a for accommodating a plunger 18 and a spring member 19 to be described later. The plunger accommodating chamber 13a has a larger diameter than the flange 18a of the plunger 18, and the piezoelectric element accommodating chamber 12a of the upper case 12. Oppositely formed concentrically with respect to the piezoelectric element accommodation chamber 12a, the liquid agent accommodation chamber 13b for accommodating the liquid agent L below the plunger accommodation chamber 13a is smaller in diameter than the plunger accommodation chamber 13a. The liquid agent is formed so as to be concentrically connected to the plunger housing chamber 13a, and the nozzle hole 13c for discharging the liquid agent L to the lower central portion of the liquid medicine housing chamber 13b is within a range of a hole diameter of about 50 μm to 300 μm. It is formed concentrically connected to the storage chamber 13b, and a liquid agent piping port 13d is formed on the side of the liquid agent storage chamber 13b.

  Here, the multilayer piezoelectric element 14 accommodated in the piezoelectric element accommodating chamber 12a of the upper case 12 has a plurality of piezoelectric elements (piezo elements) laminated along the longitudinal direction, and the multilayer piezoelectric element. 14 is connected to the piezoelectric element driving circuit 17 via the wire 16, and a pulse-shaped piezoelectric element driving voltage waveform output from the piezoelectric element driving circuit 17 is applied to the multilayer piezoelectric element 14, whereby the multilayer piezoelectric element 14. Is displaced in the stacking direction. When the voltage of the pulse waveform is 0 V, the stacked piezoelectric element 14 returns to the initial position, and when the voltage of the pulse waveform is a predetermined value, the stacked piezoelectric element 14 moves downward. Intermittent displacement is possible.

  In addition, the laminated piezoelectric element 14 is fixed by an adhesive 15 to an inner upper surface 12a1 in which one end surface 14b formed flat at one end in the longitudinal direction is formed flat in the upper part of the piezoelectric element housing chamber 12a of the upper case 12. ing.

  In the multilayer piezoelectric element 14, the other end surface 14c formed flat on the other end in the longitudinal direction on the side opposite to the one end surface 14b is bonded to the flat flange upper surface 18a1 of the flange 18a of the plunger 18. Any one of the cases where it is brought into contact with or separated from the upper surface 18a1 of the collar portion is adopted, and the other end surface 14c side in the longitudinal direction is directed downward as indicated by an arrow in accordance with application of a predetermined voltage value of the pulse waveform. It can be displaced in the displacement direction.

  At this time, when the laminated piezoelectric element 14 and the plunger 18 are bonded, both 14 and 18 can be integrally displaced in accordance with the displacement of the laminated piezoelectric element 14. On the other hand, when the laminated piezoelectric element 14 and the plunger 18 are freely contactable and separable, the laminated piezoelectric element 14 is integrally displaced by a predetermined amount in accordance with the displacement of the laminated piezoelectric element 14. On the other hand, since the application of the predetermined voltage value of the pulse waveform is finished, the plunger 18 is separated from the laminated piezoelectric element 14 and only the plunger 18 can be further displaced by the inertial force of the plunger itself.

  The plunger 18 accommodated in the plunger accommodating chamber 13a of the lower case 13 is provided so as to be movable in the vertical direction between an initial position where the liquid agent L is not discharged and a discharge position where the liquid agent L is intermittently discharged. In cooperation with the displacement of the multilayer piezoelectric element 14, it is moved downward from the initial position toward the discharge position, and is moved upward from the discharge position toward the initial position by a spring member 19 described later. Yes.

  Further, the above-described plunger 18 is made of a metal material having rigidity and oil resistance, and has a large-diameter flange 18a and a shaft that is provided below the flange 18a and has a smaller diameter and a longer diameter than the flange 18a. The portion 18b is concentrically connected to form a stepped cylindrical shape.

  Also, the flange portion 18 a of the plunger 18 and the compression spring 19 are connected to the plunger housing chamber of the lower case 13 in a state in which a spring member (hereinafter referred to as “compression spring”) 19 using a compression spring is fitted into the shaft portion 18 b of the plunger 18. While being accommodated in 13a, the lower end surface 18b1 side of the shaft portion 18b of the plunger 18 enters the liquid agent accommodation chamber 13b of the lower case 13 through the linear bearing 20 and the O-ring 21 in this order.

  At this time, the compression spring 19 is in contact with the fixed surface 13a1 in the plunger accommodating chamber 13a of the lower case 13 and the flange lower surface 18a2 of the flange 18a of the plunger 18, and when the plunger 18 is not displaced. Since the flange upper surface 18a1 of the plunger 18 presses the other end surface 14c of the multilayer piezoelectric element 14 by the urging force of the compression spring 19, the compression spring 19 is in an initial position (initial state) where the plunger 18 is not displaced. It functions as a return for returning.

  Moreover, the linear bearing 20 provided in the upper part in the liquid agent storage chamber 13b of the lower case 13 guides the shaft portion 18b of the plunger 18 so as to be movable in the vertical direction.

  Further, the ring-shaped O-ring 21 provided below the linear bearing 20 in the liquid agent storage chamber 13b of the lower case 13 fits this outer peripheral portion into the inner surface of the liquid agent storage chamber 13b and the inner peripheral portion of the plunger 18 By making sliding contact with the shaft portion 18 b, the liquid L stored in the liquid agent storage chamber 13 b is sealed from flowing into the linear bearing 20 and the plunger storage chamber 13 a of the lower case 13.

  In addition, a liquid agent storage tank 31 that stores the liquid agent L having viscosity is installed on the side of the liquid agent discharge container 11, and an upper portion of the liquid agent storage tank 31 is closed with a lid 32. The pipe 33 is piped from the lower part of the liquid agent storage tank 31 toward the liquid agent pipe port 13d of the lower case 13, and the liquid agent L in the liquid agent storage tank 31 is connected to the pipe 33 and the liquid agent pipe port 13d of the lower case 13. It is possible to flow into the liquid agent storage chamber 13b of the lower case 13 through.

  At this time, in the examples, the above-mentioned liquid L uses cream solder having a viscosity of about 0.1 to 10 Pas (Pascal second), but is not limited to cream solder having viscosity, An ink having viscosity, an adhesive having viscosity, or the like may be used.

  An air pump 35 serving as an air pressure application unit is attached to a lid 32 attached to an upper portion of the liquid agent storage tank 31 via a pipe 34. The above-described air pump 35 is connected to a switch 36a provided in the air pump low-pressure drive circuit 36 and a switch 37a provided in the air pump high-pressure drive circuit 37. As will be described later, the liquid L is applied to the base material K. In the intermittent discharge mode for intermittent discharge, the air pump low-pressure drive circuit 36 operates and the low-pressure air AP1 (FIG. 3) when an air pump low-pressure drive voltage pulse waveform described later is applied from the air pump 35 or the low pressure when an air pump low-voltage drive voltage continuous waveform is applied. In the continuous discharge mode in which the air AP2 (FIG. 3) is sent into the liquid agent storage tank 31 through the pipe 34 and the liquid agent L is continuously discharged onto the base material K, the air pump high-pressure drive circuit 37 is operated. High-pressure air AP3 (FIG. 4) during application of a continuous waveform of an air pump high-voltage drive voltage, which will be described later, from the air pump 35 is stored through the pipe 34. It is sent into the storage tank 31.

  In this embodiment, the low-pressure air AP1 (FIG. 3) or the low-pressure air AP2 (FIG. 3) and the high-pressure air AP3 (FIG. 4) can be sent from the air pump 35. In response to this, a pneumatically variable air pump that can vary the pressure may be used.

  Furthermore, in this embodiment, when the liquid agent L is discharged from the nozzle hole 13c of the lower case 13 toward the base material K, patterning data PD that is on-demand print data is input to the patterning data analysis unit 41. The patterning data analyzer 41 analyzes whether the patterning data PD is the intermittent discharge pattern data PD1 or the continuous discharge pattern data PD2, and selects the intermittent discharge / continuous discharge mode. The part 42 is informed.

  Further, the intermittent discharge / continuous discharge mode selection unit 42 has a switch function for switching between the intermittent discharge mode and the continuous discharge mode, and when the analysis result from the patterning data analysis unit 41 is the intermittent discharge pattern data PD1. Is determined to be in the intermittent discharge mode, and the intercept of the switch 42a is switched to the terminal a side to operate the piezoelectric element drive circuit 17 and the air pump low pressure drive circuit 36, while the analysis result is the continuous discharge pattern data PD2. Is determined to be in the continuous discharge mode, and the air pump high-pressure drive circuit 37 is operated by switching the intercept of the switch 42a to the terminal b side.

  The state shown in FIG. 2 is the initial state (non-operating state) of the liquid jetting assembly 10 of the embodiment, so that the stacked piezoelectric element 14 accommodated in the piezoelectric element accommodating chamber 12a of the upper case 12 is The other end surface 14c in the longitudinal direction reaches the initial position without being displaced, and the upper surface 18a1 of the flange portion 18a of the plunger 18 is brought into the other end surface in the longitudinal direction of the multilayer piezoelectric element 14 by the urging force of the compression spring 19. 14c is pressed.

  Accordingly, the plunger 18 has an upper initial position where the lower end surface 18a of the shaft portion 18b that has entered the liquid agent storage chamber 13b of the lower case 13 via the linear bearing 20 and the O-ring 21 is separated from the nozzle hole 13c. Therefore, the liquid agent L stored in the liquid agent storage chamber 13b is in a liquid agent discharge standby state without being discharged from the nozzle hole 13c of the lower case 13 due to viscosity and capillary action.

  Further, when the liquid injection assembly 10 is in the initial state (non-operating state), the patterning data PD is not input, so that the patterning data analysis unit 41 does not operate, and accordingly, the intermittent discharge / continuous discharge mode selection unit 42. The section of the switch 42a is switched to the terminal a side, but no problem occurs even if the section of the switch 42a is switched to the terminal b side in the initial state.

  Further, since the intercept of the switch 36a in the air pump low pressure drive circuit 36 is switched to the terminal b side, and the intercept of the switch 37a in the air pump high pressure drive circuit 37 is also switched to the terminal b side, the air pump 35 cannot operate. It has reached a state.

  Next, an intermittent discharge mode in which the liquid agent discharge apparatus 1 (FIG. 1) according to the embodiment of the present invention is operated and the liquid agent L is intermittently discharged onto the substrate K by the liquid agent injection assembly 10 according to the embodiment is shown in FIG. , FIG. 5 (a) and FIG.

  As shown in FIG. 3, when the liquid agent injection assembly 10 of the embodiment is in the intermittent discharge mode, as shown in FIG. 5A, the liquid agent injection is performed while moving the substrate K in the X-axis direction and the Y-axis direction. When the liquid agent L is intermittently discharged onto the substrate K by the assembly 10 (FIG. 3), an intermittent discharge pattern in which dots of the liquid agent L are printed discretely on the substrate K is obtained.

  That is, as shown in FIG. 3, when the liquid injection assembly 10 has reached the intermittent discharge mode, the input patterning data PD is analyzed by the patterning analysis unit 41 as the intermittent discharge pattern data PD1. The intercept of the switch 42 provided in the continuous discharge mode selection unit 42 is switched to the terminal a side, and the piezoelectric element drive circuit 17 and the air pump low pressure drive circuit 36 are operated.

  Then, in the intermittent discharge mode, a pulsed piezoelectric element driving voltage waveform of several tens Hz to several hundreds Hz as shown in FIG. 6 is generated in the piezoelectric element driving circuit 17, and this piezoelectric element driving voltage waveform is shown in FIG. When applied to the multilayer piezoelectric element 14 via the wire 16 as described above, when the piezoelectric element drive voltage waveform is at the high level H, the multilayer piezoelectric element 14 is displaced at high speed in the direction of the arrow, and the multilayer piezoelectric element 14 When the other end surface 14c presses the flange upper surface 18a1 of the flange 18a of the plunger 18, and the other end surface 14c of the laminated piezoelectric element 14 and the flange upper surface 18a1 of the flange 18a of the plunger 18 are bonded, lamination is performed. Since the plunger 18 is integrated with the piezoelectric element 14 and is displaced by a predetermined amount from the initial position toward the discharge position against the urging force of the compression spring 19, the shaft portion 18 of the plunger 18 is displaced. And of a liquid L stored in liquid storage chamber 13b of the lower case 13 at the lower end surface 18b1 is ejected from the nozzle holes 13c of the lower case 13.

  On the other hand, when the piezoelectric element drive voltage waveform is at the low level L (= 0), the other end surface 14c of the multilayer piezoelectric element 14 returns to the initial position, and the plunger 18 also returns to the initial position by the biasing force of the compression spring 19, so that the liquid agent L cannot be discharged from the nozzle hole 13 c of the lower case 13.

  Therefore, by applying a pulse-shaped piezoelectric element driving voltage waveform in which the high level H and the low level L are repeated to the multilayer piezoelectric element 14, the plunger 18 repeats the vertical movement through the multilayer piezoelectric element 14, The liquid agent L stored in the liquid agent storage chamber 13 b of the lower case 13 on the base material K can be intermittently discharged from the nozzle hole 13 c of the lower case 13.

  In the intermittent discharge mode, as shown in FIG. 6, the air pump low-pressure drive circuit 36 has a first method by applying an air pump low-pressure drive voltage pulse waveform and a first method by applying an air pump low-voltage drive voltage continuous waveform as described below. One of the two methods is set to be used, and the air pump 35 is driven and controlled using the first or second method.

  First, when the first method is used in the intermittent discharge mode, the intercept of the switch 36a provided in the air pump low-pressure drive circuit 36 is ON / OFF controlled between the terminal a and the terminal b. When the piezoelectric element drive voltage waveform output from the piezoelectric element drive circuit 17 is at a low level L, an air pump low pressure drive voltage pulse waveform of a high level P1 is generated in the air pump low pressure drive circuit 36. The high-level P1 air pump low-voltage driving voltage pulse waveform is applied to the air pump 35 through the switch 36a whose intercept is switched to the terminal a side, and the air pump 35 is turned on, so that the air pump 35 is turned on as shown in FIG. Low-pressure air AP1 having a value larger than the atmospheric pressure (= 1013 hPa) is intermittently sent into the liquid agent storage tank 31 through the pipe 34.Thus, the liquid agent L in the liquid agent storage tank 31 is removed from the liquid agent storage tank 31 by the low pressure air AP1 by the discharge amount of the liquid agent L discharged immediately after the liquid agent L is intermittently discharged from the nozzle hole 13c of the lower case 13. Since the liquid agent storage chamber 13b of the lower case 13 is replenished by being pushed out to the piping port 13d, the liquid agent L does not run out in the liquid agent storage chamber 13b of the lower case 13.

  On the other hand, when the drive voltage waveform output from the piezoelectric element drive circuit 17 is high level H, an air pump low pressure drive voltage pulse waveform of low level L (= 0) is generated in the air pump low pressure drive circuit 36, and this low level L The low-pressure air AP1 is not fed into the liquid agent storage tank 31 by applying the air pump low-pressure driving voltage pulse waveform of the air pump 35 to the air pump 35 via the switch 36a whose intercept is switched to the terminal b side and controlling the air pump 35 to be turned off. For this reason, the liquid agent L in the liquid agent storage tank 31 does not flow into the liquid agent storage chamber 13 b of the lower case 13.

  Next, in the intermittent discharge mode, when the second method is used, the intercept of the switch 36a provided in the air pump low-pressure drive circuit 36 is switched to the terminal a side, and the air pump low-pressure drive circuit 36 A high-level P2 air pump low-voltage drive voltage continuous waveform that is approximately 2/3 times lower than the high-level P1 when the air pump low-voltage drive voltage pulse waveform is applied is generated. By applying the air pump 35 to the air pump 35 and turning on the air pump 35, as shown in FIG. 3, the low-pressure air AP2 has a value larger than the atmospheric pressure from the air pump 35 and about 2/3 lower than the low-pressure air AP1. Is continuously fed into the liquid agent storage tank 31 through the pipe 34. Thereby, the liquid agent L in the liquid agent storage tank 31 is supplied by the low pressure air AP2 by the discharge amount of the liquid agent L discharged immediately after the liquid agent L is intermittently discharged from the nozzle hole 13c of the lower case 13. Since the liquid agent storage chamber 13b of the lower case 13 is replenished by being pushed out to the piping port 13d, the liquid agent L does not run out in the liquid agent storage chamber 13b of the lower case 13.

  Therefore, a constant amount of the liquid L is always supplied from the liquid storage tank 31 by applying pulsed or continuous low pressure air having a value larger than the atmospheric pressure to the liquid storage tank 31 by the air pump 35 in the intermittent discharge mode. Can be intermittently discharged while being supplied into the liquid agent storage chamber 13 b of the lower case 13.

  Next, a continuous discharge mode in which the liquid agent discharge apparatus 1 (FIG. 1) according to the embodiment of the present invention is operated and the liquid agent L is continuously discharged onto the substrate K by the liquid agent injection assembly 10 according to the embodiment is shown in FIG. FIG. 5B and FIG. 6 will be used to explain.

  As shown in FIG. 4, when the liquid injection assembly 10 of the embodiment is in the continuous discharge mode, as shown in FIG. 5B, the liquid injection is performed while moving the substrate K in the X-axis direction and the Y-axis direction. When the liquid agent L is continuously discharged onto the substrate K by the assembly 10 (FIG. 4), a continuous discharge pattern in which lines due to the liquid agent L are continuously printed on the substrate K is obtained.

  That is, as shown in FIG. 4, when the liquid jetting assembly 10 has reached the continuous discharge mode, the input patterning data PD is analyzed by the patterning analysis unit 41 as the continuous discharge pattern data PD2. The section of the switch 42a provided in the continuous discharge mode selection section 42 is switched to the terminal b side, and the air pump high-pressure drive circuit 37 is operated.

  In this continuous discharge mode, since the piezoelectric element driving circuit 17 does not operate, the laminated piezoelectric element 14 maintains the initial state, and the plunger 18 also reaches the initial position moved up by the urging force of the compression spring 19. The liquid material L is not discharged by the laminated piezoelectric element 14 and the plunger 18.

  In the continuous non-discharge mode, as shown in FIG. 6, the air pump is about 4/3 times the high level P1 of the air pump low pressure driving voltage pulse waveform described above in the air pump high pressure driving circuit 37, or the air pump A pump high voltage drive voltage continuous waveform of high level P3, which is approximately twice as large as the high level P2 of the low voltage drive voltage continuous waveform, is generated, and the intercept of this air pump high voltage drive voltage continuous waveform is switched to the terminal a side. By applying to the air pump 35 through the switch 37a and performing on control, as shown in FIG. 4, the air pump 35 is approximately 4/3 from the low pressure air AP1 when the air pump low pressure driving voltage pulse waveform described above is applied. The high-pressure air AP that is about twice as large or about twice as large as the low-pressure air AP2 (FIG. 3) when the air pump low-voltage drive voltage continuous waveform is applied Is continuously fed into the liquid agent storage tank 31 through the pipe 34, so that the liquid agent L in the liquid agent storage tank 31 is pushed out to the liquid agent piping port 13d of the lower case 13 by the high-pressure air AP3. The liquid agent L is continuously supplied into the storage chamber 13b, and the liquid agent L supplied into the liquid agent storage chamber 13b of the lower case 13 is continuously discharged from the nozzle hole 13c of the lower case 13 onto the base material K. be able to.

  According to the above-described liquid agent discharge device 1 according to the present invention, the laminated piezoelectric element 14 and the plunger 18 are applied to a method in which the liquid agent L having viscosity is discharged toward the base material K to be printed, and the liquid agent. Since the air pressure application system in which air having a pressure larger than the atmospheric pressure is applied to the liquid agent storage tank 31 is applied to the method of supplying L, rapid liquid agent discharge is performed by the multilayer piezoelectric element 14 having good response. Since the operation becomes possible, the printing efficiency is improved with respect to the base material K, the liquid agent L can be stored in the liquid agent storage tank 31 with good workability, and the liquid agent L is insufficient in the container 11 for storing the liquid agent L. Therefore, it is possible to contribute to improving the reliability of the liquid agent discharge device 1.

  Further, when the viscous liquid agent L is discharged toward the substrate K to be printed, the liquid agent discharge device 1 has a nozzle hole in which the liquid agent L is provided in the container 11 by the laminated piezoelectric element 14 and the plunger 18. The liquid agent intermittent discharge means for intermittently discharging the liquid agent 13c toward the base material K and the liquid agent storage tank 31 for storing the liquid agent L are continuously applied with air of a predetermined pressure to store the stored liquid agent L in the container 11. The liquid agent continuous discharge means for continuously discharging from the nozzle hole 13c toward the base material K while being continuously supplied to the inside, and the print data PD is the intermittent discharge mode data PD1 or the continuous discharge mode data PD2. The analysis unit 41 for analyzing the above, and the intermittent discharge / continuous discharge mode for switching the liquid agent intermittent discharge unit and the liquid agent continuous discharge unit to selectively operate according to the analysis result of the analysis unit 41. Since the selection means 42 is provided, the liquid agent discharge device 1 can be multi-functionalized by selectively switching between the intermittent discharge mode and the continuous discharge mode. Can be provided. In addition, since the liquid agent intermittent discharge unit and the liquid agent continuous discharge unit can be automatically switched in accordance with the print data, the usability of the liquid agent discharge device 1 can be further improved.

  Next, when the above-described liquid agent discharge apparatus 1 is applied, a liquid agent discharge method according to the present invention will be described with reference to FIGS. 1 and 2 described above and new FIGS. 7 and 8.

  FIGS. 7A and 7B are diagrams schematically showing a comparative example for the liquid agent discharge method according to the present invention. FIGS. 8A and 8B are views schematically showing a liquid agent discharge method according to the present invention.

  As described above with reference to FIGS. 1 to 3, the liquid agent ejection assembly 10 and the base material K to be printed can move relatively in the X-axis direction and the Y-axis direction in the liquid agent discharge apparatus 1. For example, when the X-axis moving table 3 and the Y-axis moving table 4 on which the base material K is placed move in the X-axis direction and the Y-axis direction, the masses of the both moving tables 3 and 4 are large. An inertial force is generated in both the moving tables 3 and 4.

  Unlike the embodiment, even when a structure for moving the liquid injection assembly 10 is applied, an inertia force is generated in the liquid injection assembly 10 when the mass of the liquid injection assembly 10 is large.

  When inertia force is generated when the X-axis moving table 3 and the Y-axis moving table 4 or the liquid agent injection assembly 10 moves as described above, a comparative example for the liquid agent discharge method according to the present invention is shown in FIG. A description will be given using (b).

  As shown in FIG. 7A, the X-axis moving table 3 and the Y-axis moving table 4 or the liquid agent injection assembly 10 are zigzag continuously with respect to the base material K in the X-axis direction and the Y-axis direction. When moving along the dot trajectory Dxy and printing the dots by the liquid L discharged onto the base material K as shown in FIG. 7B, the turning point (or bent) of the dot trajectory Dxy is printed. Point), the above-described inertia force causes displacement of the ejection position of the dots, and each dot on both ends in the X-axis direction undulates along the Y-axis direction, so that the quality of the printed pattern on the outer peripheral side decreases. End up.

  Therefore, a liquid agent discharge method according to the present invention that can solve the problems of the comparative example will be described with reference to FIGS.

  As shown in FIG. 8A, when moving the X-axis moving table 3 and the Y-axis moving table 4 or the liquid agent ejecting assembly 10, dots formed by the liquid agent L to be ejected onto the substrate K to be printed. Of the outer peripheral dots along the rectangular frame of the base material K, and the inner peripheral dot trajectory of the inner side of the base material K in a zigzag manner in the X axis direction and the Y axis direction. As shown in FIG. 8 (b), the liquid agent L is continuously drawn so as to be drawn in one stroke along the locus Dout on the outer peripheral side with respect to the outer peripheral side of the base material K. A continuous dot line is printed on the substrate K.

  As a result, even if inertial force is generated in the moving X-axis moving table 3 and Y-axis moving table 4 or the liquid agent ejecting assembly 10, each dot on both ends in the X-axis direction (or Y-axis direction) is in the Y-axis direction. Since it is printed linearly without undulation along (or the X-axis direction), the quality of the printed pattern on the outer peripheral side can be improved.

  On the other hand, when the liquid agent L is printed on the base material K along the locus Din of the dot on the inner peripheral side, it occurs in the moving X-axis moving table 3 and the Y-axis moving table 4 or the liquid agent ejecting assembly 10. There is no problem because the print pattern quality deterioration due to inertia is inconspicuous.

  At this time, either the outer peripheral dot trajectory Dout or the inner peripheral dot trajectory Din may be printed first.

It is the perspective view which showed the liquid agent discharge apparatus which concerns on this invention. FIG. 2 is a configuration diagram showing a configuration when the liquid agent ejection assembly shown in FIG. 1 is in an initial state in the liquid agent ejection device according to the present invention. FIG. 6 is a diagram for explaining an operation when the liquid agent ejection assembly is in an intermittent discharge mode in the liquid agent discharge apparatus according to the present invention. FIG. 6 is a diagram for explaining an operation when the liquid agent ejection assembly is in a continuous discharge mode in the liquid agent discharge apparatus according to the present invention. (A), (b) is the liquid discharge apparatus according to the present invention, the intermittent discharge pattern when the liquid is intermittently discharged onto the base material, and the time when the liquid is continuously discharged onto the base material It is the figure which showed the continuous discharge pattern typically, respectively. FIG. 4 is a waveform diagram showing drive waveforms of a piezoelectric element drive circuit, an air pump low pressure drive circuit, and an air pump high pressure drive circuit in the liquid agent discharge device according to the present invention. (A), (b) is the figure which showed typically the comparative example with respect to the liquid agent discharge method which concerns on this invention. (A), (b) is the figure which showed typically the liquid agent discharge method concerning this invention. It is the longitudinal cross-sectional view which showed the injection apparatus of the prior art example 1. It is the longitudinal cross-sectional view which showed the apparatus for small amount material distribution of the prior art example 2.

Explanation of symbols

1 ... Liquid dispenser,
2 ... Base table, 3 ... X-axis moving table, 4 ... Y-axis moving table,
5, 6 ... Stepping motor with first and second encoders,
10 ... Liquid injection assembly,
11 ... Container for discharging liquid agent,
12 ... Upper case, 12a ... Piezoelectric element accommodation chamber, 12a1 ... Internal upper surface of the piezoelectric element accommodation chamber,
12b ... Wire hole,
13 ... Lower case, 13a ... Plunger accommodating chamber, 13b ... Liquid agent accommodating chamber,
13c ... Nozzle hole, 13d ... Liquid agent piping port,
14 ... laminated piezoelectric element, 14a ... cylindrical outer peripheral surface, 14b ... one end face, 14c ... the other end face,
15 ... Adhesive, 16 ... Wire, 17 ... Piezoelectric element drive circuit,
18 ... Plunger, 18a ... collar part, 18a1 ... collar part upper surface, 18a2 ... collar part lower surface,
18b ... shaft part, 18b1 ... lower end surface of the shaft part,
19 ... Spring member (compression spring), 20 ... Linear bearing, 21 ... O-ring,
31 ... Tank for storing liquid agent, 32 ... Lid, 33, 34 ... Pipe, 35 ... Air pump,
36 ... Air pump low pressure drive circuit, 36a ... Switch,
37 ... Air pump high pressure drive circuit, 37a ... Switch,
41 ... patterning data analysis unit,
42 ... intermittent discharge / continuous discharge mode selection unit, 42a ... switch,
AP1, AP2 ... low pressure air, AP3 ... high pressure air, K ... substrate (substrate), L ... liquid agent,
PD: Patterning data,
PD1 ... intermittent discharge pattern data, PD2 ... continuous discharge pattern data,
Dout: locus of dots on the outer circumference side, Din: locus of dots on the inner circumference side.

Claims (5)

In the liquid agent discharge device that discharges the liquid agent having viscosity toward the printing material,
A laminated piezoelectric element that is displaced in the laminating direction with application of a drive voltage waveform;
A container having a liquid agent storage chamber for storing the liquid agent, and a nozzle hole for discharging the liquid agent stored in the liquid agent storage chamber;
It is provided in the container so as to be movable between an initial position where the liquid agent is not discharged and a discharge position where the liquid agent is discharged, and in cooperation with the displacement of the multilayer piezoelectric element, the discharge position from the initial position. A plunger that discharges the liquid agent from the nozzle hole toward the printing material while pushing the liquid agent with the movement to
A spring member for biasing the plunger back to the initial position;
A liquid storage tank for storing the liquid,
Air pressure application means for applying air having a pressure greater than atmospheric pressure into the liquid agent storage tank and pushing out the stored liquid agent into the liquid agent storage chamber by a discharge amount;
A liquid agent discharge device comprising: In the liquid agent discharge device that discharges the liquid agent having viscosity toward the printing material,
Liquid agent intermittent discharge means for discharging the liquid agent intermittently from the nozzle hole provided in the container to the substrate by a laminated piezoelectric element and a plunger;
A predetermined pressure of air is continuously applied to the liquid agent storage tank for storing the liquid agent, and the stored liquid agent is continuously supplied into the container while being continuously supplied from the nozzle hole toward the substrate. Liquid agent continuous discharge means to be discharged to,
A liquid agent discharge device comprising: In the liquid agent discharge device that discharges the liquid agent having viscosity toward the printing material,
Liquid agent intermittent discharge means for discharging the liquid agent intermittently from the nozzle hole provided in the container to the substrate by a laminated piezoelectric element and a plunger;
A predetermined pressure of air is continuously applied to the liquid agent storage tank for storing the liquid agent, and the stored liquid agent is continuously supplied into the container while being continuously supplied from the nozzle hole toward the substrate. Liquid agent continuous discharge means to be discharged to,
An analysis means for analyzing whether the print data is intermittent discharge mode data or continuous discharge mode data;
Intermittent discharge / continuous discharge mode selection means for switching the liquid agent intermittent discharge means and the liquid agent continuous discharge means to selectively operate according to the analysis result of the analysis means;
A liquid agent discharge device comprising:   When the liquid agent intermittent discharge means is operated, low pressure air having a value larger than atmospheric pressure is applied in a pulsed manner or continuously in the liquid agent storage tank, and the stored liquid agent is intermittently discharged by the discharge amount. When the liquid agent continuous discharge means is operated while being supplied into the container, high pressure air having a value higher than that of the low pressure air is continuously applied to the liquid agent storage tank, and the stored liquid agent is supplied. The liquid agent discharge device according to claim 2 or 3, wherein the liquid agent is continuously supplied into the container. The liquid agent is discharged from the nozzle hole to the printing material by relatively moving the liquid material discharging means for discharging the viscous liquid material from the nozzle hole and the printing material in the X axis direction and the Y axis direction orthogonal to each other. In the liquid agent discharge method of discharging toward the
The movement trajectory of the dots by the liquid agent discharged onto the substrate is continuously zigzag in the X axis direction and the Y axis direction on the outer periphery side along the frame of the substrate and the inner side of the substrate. And separately discharging the liquid agent to the outer peripheral side of the substrate so that the liquid agent is written along the outer peripheral dot trajectory. A liquid agent discharge method characterized by the above.

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