KR20160053384A - Apparatus for discharging fixed quantity of liquid - Google Patents

Abstract

The present invention relates to an apparatus for discharging a fixed quantity of liquid with high accuracy and, more specifically, to an apparatus for discharging a fixed quantity of liquid with high accuracy, which can perform continuous operation, and has effects of excellent productivity. The apparatus comprises: a valve body unit formed with a path inside, and formed with a discharging hole on a lower end unit; a solenoid actuator detachable coupled to one side of the valve body unit; an opening and closing rod operated to ascend and descend; a flow path forming adaptor formed with an inflow hole on one side, and formed with a transporting flow path inside; a barrel for supplying a solution to the inflow hole; and a needle body unit including a needle housing for storing the solution discharged from the discharging hole, and a needle for discharging the solution stored in the needle housing to the outside.

Description

Technical Field [0001] The present invention relates to a high-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-precision liquid dispensing apparatus, and more particularly, to a high-precision liquid dispensing apparatus having a solenoid actuator that is turned on and off by an external electrical signal.

Generally, a finished work of a printed circuit board, for example, a dotted discharge operation of an adhesive liquid for connecting each element of a printed circuit board, an operation of dispensing and dispensing a viscous liquid to encapsulate the arranged chips or an operation of underfilling a flip chip Etc., there has been used a liquid dispenser to distribute a metered amount of the viscous liquid on the working medium, which device requires continuous and high precision for high productivity do.

The method of discharging the liquid through the liquid quantitative ejection apparatus includes a pneumatic method of applying the pressurized extruded air to the liquid for a desired period of time and a plunger type method of moving the pushing member, The method is known.

The pneumatic method is a very simple method using compressed air. It is a generally used method because it is advantageous in that it can be used while preserving the liquid in a clean state because only compressed air comes into contact with the liquid except for the storage container.

On the other hand, the plunger type has an advantage in that the volume of the discharged liquid can be determined by the cross-sectional area of the pressing member in contact with the liquid and the amount of movement of the pressing member, and in the case of filling or dispensing liquid, It is the method that is being used.

For example, in a conventional fixed dose dispensing apparatus which is used for point coating, line dispensing, or the like on a substrate regularly or irregularly on a substrate in a semiconductor manufacturing process, for example, a dispensing apparatus disclosed in Japanese Patent No. 4636729, The discharge amount of the liquid to be discharged is controlled by the rotation speed of the screw, the rotation time, and the like. According to this, the viscosity and the fluidity of the liquid and the amount of liquid in the storage container are not affected by the excellent control of the screw rotation speed and the stop timing precision. In practice, however, the rod is lowered to seal the nozzle. However, when the discharge port is in a physically opened state, particularly when the viscosity of the liquid is low , When the liquid in the storage container is pressed, the outer peripheral surface of the screw and the screw needle If the distance between the inner circumferential surface of the gong is a large etc. aekjeol (液 切) at the time of stop of the liquid discharge failure, and are also a problem of liquid leakage caused by the weight of the liquid and of the liquid due to the pressure.

In addition, in the case of the plunger type, since the movement amount of the piston, that is, the stroke, is a method for determining the discharge amount, the discharge operation is very careful and slow progress because of its excellent precision and quantitative characteristics, Is not mounted in the liquid metering / dispensing apparatus, stroke setting becomes disadvantageous.

Accordingly, there is an increasing demand for a high-precision liquid dispensing device capable of overcoming the unreasonable points of the conventional liquid dispensing device and promptly discharging the solution with quick response, and allowing the operator to easily set a precise liquid dispensing amount.

Japanese Patent No. 4636729

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high-precision liquid dispensing apparatus capable of rapidly dispensing a solution with a quick response.

It is another object of the present invention to enable real-time confirmation of the leakage of liquid through the liquid leakage monitoring hole formed in the valve body portion between the liquid discharging operations.

Another object of the present invention is to provide a micrometer at the upper end of the valve body to precisely control the stroke of the opening / closing rod.

According to an aspect of the present invention, there is provided an air purifier comprising: a valve body portion having a passage formed therein in the longitudinal direction thereof and having a discharge hole communicating with the passage at a lower end thereof; An opening / closing rod inserted in the inside of the valve body portion and driven by the solenoid actuator to move up and down in a longitudinal passage; and a valve body coupled to a lower portion of the valve body portion, A flow path forming adapter in which a supply passage is formed so that a solution supplied to the inflow hole is supplied to the inside of the passage of the valve body portion; a barrel coupled to the inflow hole of the flow path forming adapter to supply the solution to the inflow hole; And is coupled to a lower end portion of the valve body portion and discharged downward from the discharge hole And a needle coupled to a lower portion of the needle housing to discharge a predetermined amount of a solution accommodated in the needle housing to the outside so that the mouth of the needle is opened and closed by the lifting and lowering operation of the opening and closing rod And a needle body portion.

Wherein the solenoid actuator further comprises a protruding engaging portion protruding sidewise from one side of the valve body for engaging the solenoid actuator, wherein the solenoid actuator is spaced apart from the solenoid actuator by a width protruding from the protruding engaging portion Respectively.

The solenoid actuator may further include an actuator cover portion having an internal space formed therein for receiving the solenoid actuator and fixed to the valve body portion. The actuator cover portion may protrude and extend from both sides of the valve body portion to cover both sides of the valve body portion, The engaging plate being fixedly attached to the base plate.

The valve body may further include an anti-interference body protruding from the opposite valve body portion to which the solenoid actuator is coupled, the protruding surface being flattened to one side, and at least one coupling hole being formed on a surface thereof do.

A micrometer is installed at an upper end of the valve body to adjust a stroke of the opening / closing rod.

A liquid leakage monitoring hole communicating with the passage is formed on one side surface of the valve body.

According to the present invention as described above, the solenoid actuator that is turned on and off by external electrical signals is installed to have quick response, and the opening / closing rod seals the needle inlet through which the liquid is discharged to minimize the dead volume in the closed space. The opening and closing rod is opened and the liquid is discharged quickly, so that continuous operation is possible and the productivity is excellent.

The stroke of the opening / closing rod can be precisely controlled by a micrometer provided at the upper end portion of the valve body portion, so that the operator can quickly control as needed to achieve high-precision work.

Further, the operator can always check the liquid leakage phenomenon due to the rising and falling of the opening / closing rod through the liquid leakage monitoring hole, thereby minimizing the work deficiency due to liquid leakage.

1 and 2 are perspective views of a high-precision liquid dispensing device according to the present invention.
FIG. 3 is an exploded perspective view of a high-precision liquid dispensing device according to the present invention in a state in which main components are separated.
4 is an exploded perspective view of a valve body portion according to the present invention.
5 and 6 are sectional views showing a high-precision liquid dispensing apparatus according to the present invention.
7 is a cross-sectional view illustrating a state where a solution is injected into the high-precision liquid dispensing device according to the present invention.
8 is a sectional view showing a state in which the solution is discharged to the needle by the operation of the opening and closing rod.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is an exploded perspective view of a high-precision constant-volume liquid dispensing apparatus according to the present invention, in which the main components are separated, and FIG. 4 is a cross- FIGS. 5 and 6 are cross-sectional views illustrating a high-precision liquid dispensing apparatus according to the present invention. FIG.

A valve body portion 100 in which a passage 101 is formed in the longitudinal direction inside and a discharge hole 130b communicating with the passage 101 is formed in a lower end portion of the valve body portion 100, A solenoid actuator 200 detachably coupled to one side of the valve body 100 and a solenoid actuator 200 connected to the valve body 100 to open and close the solenoid actuator 200 in response to driving of the solenoid actuator 200 on the inner passage 101 of the valve body 100 A flow path forming adapter 400 coupled to one side of the lower portion of the valve body portion 100 to form a flow path for supplying liquid to the inside of the path 101 of the valve body portion 100, A barrel 500 connected to the valve body part 100 and connected to the valve body part 100 to supply the solution to the valve body part 100; (Not shown).

The valve body 100 includes a main body portion 120 having a longitudinally extending passageway 101 formed therein and vertically moving the opening and closing rod 300 up and down on the passageway 101, An upper body 110 coupled to an upper portion of the main body 120 to seal an upper portion of the main body 120 and a discharge hole 130b coupled to the lower portion of the main body 120 to communicate with the passage 101, And a lower body part 130 on which the lower body part 130 is formed.

The main body portion 120 is formed with upper and lower storage space portions 121 extending from the passageway 101 and a spring member 122 is accommodated in the storage space portion 121 formed at the upper and lower sides, 300 are operated to move up and down.

The solenoid actuator 200 is further protruded from one side of the main body 120 so that the solenoid actuator 200 protrudes from the side surface of the valve body 100, The engaging portion 123 is engaged with the protruding width.

This is because when the liquid receives heat, the viscosity is lowered and the flowability is improved. Therefore, a greater amount of liquid is discharged even under the same discharge condition. On the contrary, if the liquid is cooled, the viscosity becomes higher and the flowability is deteriorated The distance between the passage 101 through which the liquid is transferred and the solenoid actuator 200 by the protruding engaging portion 123 is spaced apart from each other so as to minimize the impact due to heat. do.

In addition, an actuator cover part 210 is coupled to the main body part 120 to protect the solenoid actuator 200 coupled to the protrusion coupling part 123 from an external impact. The actuator cover 210 includes an inner housing space for accommodating the solenoid actuator 200 and a coupling plate 211 is protrudingly formed on both sides of the main body 120 so as to enclose both sides of the main body 120, Is fixed to the main body part 120 and supported. Here, the coupling plate 211 is closely attached to both sides of the main body 120 and fixedly supported by bolts.

A coupling hole 124a is formed in the main body portion 120 on the opposite side of the side where the protrusion coupling portion 123 of the main body portion 120 is formed, that is, on the opposite side of the main body portion 120 on which the solenoid actuator 200 is coupled, The coupling plate 211 installed to surround both sides of the main body 120 is not fixed to the main body 120 but is inclined at a slight angle So that interference with one side surface of the coupling plate 211 protruding from the side surface of the main body portion 120 is prevented by the inclination.

In addition, the interference preventing body 124 may be formed by flattening the protruding surface flat on one side and forming at least one fitting hole 124a on the flattened surface so as to be used in combination with other equipment. The discharge direction of the high-precision liquid metering / dispensing apparatus according to the present invention can be precisely engaged without being shifted even when bolted to the engaging hole 124a.

The upper body part 110 protrudes downward and is inserted into the upper receiving space part 121a of the main body part 120 to form a receiving body 111 for sealing the passageway 101, And a receiving groove 112 for receiving the upper end of the spring member 122 is formed on the inner side. A micrometer 700 is installed at an upper end of the upper body 110 so that an operator can easily set the stroke of the opening and closing rod 300 through a scale provided on the micrometer 700.

The lower body portion 130 is communicated with the passage 101 of the main body portion 120 in a downward direction so that the opening and closing rod 300 is lifted and lowered and the liquid conveying passage 300 having a diameter larger than that of the opening / And a liquid inlet 130a communicating with the liquid feed path 130a and having a smaller diameter than the diameter of the liquid feed path 130a and discharging a liquid flowing into the liquid feed path 130a from the body A discharge hole 130b is formed.

The flow path forming adapter 400 is coupled to one side of the lower body part 130 to receive the solution of the barrel 500 from the liquid transfer path 130a and the inner transfer path 402 of the flow path forming adapter 400, So as to communicate with the liquid transfer path 130a.

The lower body portion 130 is formed with a housing body 131 which protrudes upward from the lower body portion 130 and is inserted into the lower housing space of the main body portion 120. Inside the housing body 131, And the lower liquid transfer path 130a of the main body part 120 is communicated with the inner bottom surface of the receiving groove 132. In addition, The openings 133 are formed.

In addition, at least one packing member 134 is inserted into the bottom surface of the receiving grooves 112 and 132 of the lower body part 130 so that the solution supplied to the lower liquid conveying path 130a is not leaked to the upper passage 101 Seal it. A liquid leakage monitoring hole 125 communicating with the passage 101 formed in the longitudinal direction of the body is formed on one side wall of the upper portion of the lower housing space 121b of the main body portion 120, The solution leaks through the liquid leakage monitoring hole 125 communicated with the passage 101 when the solution supplied to the liquid conveying path 130a of the upper passage 130 is leaked to the upper passage 101, .

The opening and closing rod 300 is coupled to an opening and closing packing plate 310 inserted into the upper end portion of the main body portion 120 in a shape corresponding to the diameter of the upper receiving space portion 121a of the main body portion 120, And a rod 320 of a predetermined length inserted into the passage 101 is coupled to the lower end. The lower end of the rod 320 is formed to have a diameter smaller than that of the upper portion so that the inlet of the needle 620 is opened and closed through the discharge hole 130b.

The air injection connector 800 is coupled to the side surface of the main body part 120 so as to inject high pressure air into the internal space part 121a of the main body part 120. By driving the solenoid actuator 200 The opening and closing rod 300 is moved up and down inside the passageway 101 as the opening and closing packing plate 310 is pushed by the air pressure to be injected into the storage space part 121a, To seal or open the mouth of the needle.

As described above, the flow path forming adapter 400 is connected to one side of the lower body part 130, and the inflow hole 401 is formed at one side thereof. The barrel 500 including the container into which the solution is injected enters the inflow hole 401 The solution injected into the flow passer 401 coupled to the hole 401 flows into the flow path forming adapter 400 through the inflow hole 401 and flows along the transfer path 402 formed in the flow path forming adapter 400, Flows into the transfer path 130a, and the solution is discharged to the outside through the discharge hole 130b.

The needle body 600 includes a needle housing 610 coupled to cover the discharge hole 130b formed in the lower body part 130 and containing a solution discharged downward through the discharge hole 130b, The solution contained in the needle housing 610 of the needle body portion 600 including the needle 620 coupled to the lower portion of the needle 610 is guided to the inlet of the needle 620 by the ascending and descending operations of the opening and closing rod 300 So that the solution contained in the needle housing 610 is discharged to the outside.

Hereinafter, an operation method of discharging the solution through the high-precision liquid dispensing apparatus according to the present invention will be described in detail.

FIG. 7 is a cross-sectional view illustrating a state in which a solution is injected into a high-precision liquid dispensing device according to the present invention, and FIG. 8 is a cross-sectional view illustrating a state in which a solution is injected into a needle by operation of an opening / closing rod.

7, the viscous solution contained in the barrel 500 is guided along the transfer path 402 of the flow path forming adapter 400 to the liquid of the lower body part 130 And is injected into the transfer path 130a. The liquid transfer path 130a communicates with the needle housing 610 of the needle body 600 so that the solution injected into the liquid transfer path 130a is transferred to the needle housing 610. At this time, The diameter of which is lower than that of the upper portion, and is inserted into the needle housing 610 through the liquid transfer path 130a. The solution flows into the space between the opening and closing rod 300 and the liquid transfer path 130a and the space separated by a predetermined distance from the inner circumference of the needle housing 610. The lower end of the opening and closing rod 300 closes the inlet of the needle 620, And is not discharged to the outside through the front end of the needle 620.

8, when the solenoid actuator 200 is driven by an electrical signal, compressed air is injected into the upper storage space 121 of the main body part 120 through the air injection connector 800, Closing rod 300 which is hermetically sealed by the needle inlet is raised and lowered, and the solution introduced into the needle housing 610 is discharged to the outside through the front end of the needle 620.

At this time, according to the present invention, a solenoid actuator 200 operated by an electrical signal is installed to have a very quick response of 1.5 milliseconds. When the inlet of the needle 620 is opened, the solution rapidly moves the needle 620 And is discharged to the outside.

This allows the opening / closing rod 300 to be lowered to the inlet of the needle 620 to be closed so that the liquid accommodated in the needle housing 610 is discharged immediately without a time margin for contraction. In other words, as in the present invention, when the opening / closing rod 300 does not close the inlet portion of the needle 620 and the space between the inlet of the needle 620 and the opening and closing rod 300 is formed, The solution is not directly discharged through the inlet of the needle 620 even when the opening and closing rod 300 is opened and the solution is pushed downward from the upper side in order to discharge the solution to the front end of the needle 620, When the opening / closing rod 300 is closed again, the liquid is slightly pushed to the front end of the needle 620 due to the shrunk solution, and the liquid is leaked to the outside.

That is, in the present invention, the opening / closing rod 300 is sealed at the inlet of the needle 620, thereby minimizing the dead volume in the closed space so that the opening / closing rod 300 is opened and the liquid is rapidly discharged.

The stroke of the opening and closing rod 300 is precisely controlled through the micrometer 700 installed at the upper end of the valve body 100 so that the operator can quickly control the amount of the solution discharged to the outside as needed .

In the present invention, whether or not the solution leaks into the liquid leakage monitoring hole 125 through the liquid leakage monitoring hole 125 during the use of the liquid leakage monitoring hole 125 So that the inner packing member 134 is replaced.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims should include all such modifications and changes as fall within the scope of the present invention.

100: valve body part 101: passage
110: upper body part 111: storage body
112: storage groove
120: main body part 121: storage space part
122: spring member 123:
124: Anti-interference body 124a: Coupling hole
125: Liquid leak monitoring hole
130: Lower body part 130a:
130b: Discharge hole 131: Storage body
132: storage groove 133: opened
134: packing member
200: Solenoid actuator 210: Actuator cover part
211: engaging plate
300: opening / closing rod 310: opening / closing packing plate
320: Load
400: flow forming adapter 401: inflow hole
402:
500: Barrel
600: Needle body part 610: Needle housing
620: Needle
700: Micrometer
800: Air injection connector

Claims (6)

A valve body portion having a passage formed in the longitudinal direction thereof and a discharge hole communicating with the passage at a lower end thereof;
A solenoid actuator detachably coupled to one side of the valve body;
An opening / closing rod inserted into the inside of the valve body and being driven to move up and down within a passage in a longitudinal direction by driving the solenoid actuator;
A flow path forming adapter coupled to one side of the lower portion of the valve body and having an inlet hole formed at one side thereof and having a transfer passage formed therein so that a solution supplied to the inlet hole is supplied to the inside of the passage of the valve body;
A barrel coupled to the inflow hole of the flow path forming adapter to supply the solution to the inflow hole;
A needle housing coupled to a lower end of the valve body to receive a solution discharged downward from the discharge hole and a needle coupled to a lower portion of the needle housing to discharge a predetermined amount of solution stored in the needle housing, A needle body portion in which an opening of the needle is opened and closed by an upward / downward movement of the opening / closing rod; And a liquid-metering unit.
The method according to claim 1,
The valve body portion
Further comprising a protruding engaging portion protruding sidewise from one side of the valve body for engaging the solenoid actuator,
Wherein the solenoid actuator is coupled to the side surface of the valve body part such that the protruding engagement part is spaced apart from the protruding engagement part by a width of the projection.
The method according to claim 1,
Further comprising an actuator cover portion formed in the inner housing space for protecting the solenoid actuator and fixedly coupled to the valve body portion,
Wherein the actuator cover portion is formed with an engaging plate protrudingly extended so as to enclose both sides of the valve body portion and closely contacted to both sides of the valve body portion.
The method of claim 3,
And an anti-interference body protruding from the valve body portion of the opposite side to which the solenoid actuator is coupled, the protruded surface being flattened to one side, and at least one coupling hole being formed on the side surface of the valve body portion. Which is a high-precision liquid dispensing device.
The method according to claim 1,
Wherein a micrometer is installed at an upper end of the valve body to adjust a stroke of the opening / closing rod.
The method according to claim 1,
And a liquid leakage monitoring hole communicating with the passage is formed on one side surface of the valve body portion.

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