KR20060089450A - Inlet /outlet unit for fixed liquid with enhanced durability - Google Patents

Abstract

The present invention relates to a liquid quantitative suction discharging unit, the suction discharging unit has a cylindrical hollow portion penetrating therein, the inlet and outlet communicating with the hollow portion; and the hollow portion of the housing in a cylindrical shape A piston seated on one side and reciprocating at a predetermined stroke length; and one side is selectively connected to the inlet or outlet and the other side is formed with a moving path to communicate with the hollow part, and is seated on the other side of the hollow part of the housing at a predetermined angle. The rotating cylinder of the cylindrical shape; rotates, the housing, the piston and the rotating sphere is made of a ceramic material. With this configuration, it is possible to reliably discharge the quantitative amount while being installed in the discharging device, and the structure is simple, and the manufacturing cost can be reduced. Also, since the corrosion resistance and durability are increased by the ceramic, substances such as strong acid and strong alkali can be quantified. It can discharge.

Liquid, liquid, metering, discharge, corrosion resistance, ceramic

Description

{Inlet / outlet unit for fixed liquid with enhanced durability}

1 is a block diagram of a discharge device equipped with a liquid quantitative suction discharge unit according to an embodiment of the present invention.

FIG. 2 is a perspective view of the liquid quantitative suction dispensing unit shown in FIG. 1; FIG.

3 is an exploded perspective view of the suction discharge unit shown in FIG. 1;

4 is a view for explaining an operating state of the suction discharge unit shown in FIG.

5 is an exploded perspective view of a suction discharge unit according to another embodiment;

6 is a view for explaining an operating state of the suction discharge unit shown in FIG.

7 is a main sectional view of a suction dispensing unit according to another embodiment;

Explanation of symbols on the main parts of the drawings

10: suction discharge unit, 20: housing,

21: hollow part, 23: inlet,

25: outlet, 30: piston,

40: a rotary hole, 41: a through hole,

43: chamfering, 50: ceramic coating film

The present invention relates to a liquid quantitative suction dispensing unit, and in particular, it is installed in the discharging device to discharge the liquid substance by a predetermined capacity, and also to discharge the substance of strong acidity or strong alkali by a predetermined amount, and the suction discharging with increased durability. It is about a unit.

Generally, a liquid quantitative dispensing device capable of precisely quantitatively discharging to apply, dotting, fixing, and injecting viscous fluids such as resin materials, conductive adhesives, cream solders, UV resins, and various pasty materials such as silver pastes. There is.

It is important for such a liquid metering discharge device to keep the amount of liquid discharged irrespective of the amount of liquid remaining in the cylinder in which the liquid is filled. The discharge device (application number 10-1991-7000780) according to the prior art has a cylinder filled with a liquid, an air supply source for supplying pressurized air to the cylinder, a first pipe, and a cylinder by a second pipe. A discharge electromagnetic switching valve connected to an air supply source, an actuator provided in a second pipe, first and second pressure sensors measuring first and second pipe internal pressures, and the discharge electromagnetic switching The output time of the shift signal is output based on the change of the integral value within the preset shift signal output time of the measured pressure by the first pressure sensor after communication between the first and second pipes while outputting the shift signal to the valve. It is composed of a control unit for controlling.

According to the liquid quantitative ejection apparatus disclosed in this manner, it is possible to discharge a certain amount of liquid with high precision at all times regardless of the small amount of residual liquid amount in the cylinder and regardless of the magnitude of the increase in the internal pressure of the cylinder. In addition, by accurately detecting the remaining amount of liquid in the cylinder, it is possible to effectively prevent inability to discharge the liquid, and at the same time, to make it possible to replace the cylinder properly at all times. Furthermore, it is possible to completely prevent excess discharge and sagging of the liquid from the cylinder. .

However, since the liquid discharge device according to the prior art essentially requires a pair of pressure sensors and an A / D conversion unit, there is a problem in that the configuration is complicated and the manufacturing cost is high. In addition, there is a problem that can not discharge a strong acidic material, such as sulfuric acid, which can dissolve almost all metals except gold and platinum, and particularly has a poor durability.

Therefore, the present invention was devised to solve the above problems, and an object of the present invention is to be equipped in the discharge device and to reliably discharge the quantitatively, while simplifying the construction and reducing the manufacturing cost, and also the strong acidity. In addition, strong alkaline substances can be discharged quantitatively, and in particular, to provide a liquid quantitative suction discharge unit having increased durability.

The above object is achieved by the present invention, the suction discharging unit mounted on the discharging device according to one aspect of the present invention for discharging the liquid substance quantitatively has a cylindrical hollow portion penetrating therein, and communicating with the hollow portion. A piston which is seated on one side of the hollow portion of the housing in a cylindrical shape and reciprocates with a predetermined stroke length, and one side is selectively connected to the inlet or the outlet and the other side communicates with the hollow portion. It is characterized in that it comprises a movement path is formed, the cylindrical rotary sphere which is seated on the other side of the hollow portion of the housing and rotated at a predetermined angle.

And the housing, the piston and the rotary sphere is characterized in that made of a ceramic material.

The inner surface of the hollow portion, the inlet and the outlet of the housing is coated with a ceramic material, and the surfaces of the piston and the rotating hole are also coated with a ceramic material.

In the present invention, the movement path formed in the rotary sphere is characterized by consisting of a chamfered portion formed by a through-hole formed by the letter "b" or the end portion cut.

And the outlet and the outlet is characterized in that it is formed orthogonal to the 90 ° angle, or opposed to the 180 ° angle.

According to another aspect of the invention, the rotary sphere is characterized in that rotated at a predetermined angle by a step motor, a servo motor or an actuator.

The piston may be reciprocated by an actuator or reciprocated by a ball screw rotated by a motor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and like reference numerals designate like parts throughout the drawings.

1 is a configuration diagram of a discharge device equipped with a liquid quantitative suction discharging unit according to an embodiment of the present invention, and FIGS. 2 and 3 are perspective views and separate perspective views of the suction discharging unit shown in FIG.

As shown in the figure, the liquid metering suction dispensing unit according to the present invention shown by the reference numeral 10 is a piston 20 seated in the housing 20, the hollow portion 21 is formed and the hollow portion 21 of the housing 20 30, the rotary ball 40, and the like.

The housing 20 is formed of a ceramic material, and a cylindrical hollow portion 21 penetrates horizontally, and an inlet 23 and an outlet 25 communicating with the hollow portion 21 are formed.

The inlet 23 is a passage through which the liquid fluid supplied from the tank 70 mounted on the discharge device is introduced, and the outlet 25 is a passage through which the introduced fluid is discharged and discharged in an appropriate amount. The needle 80 is connected to the outlet 25. The inlet 23 and the outlet 25 are formed in communication with the hollow portion 21 and orthogonal to each other at 90 ° or opposite to each other at 180 °. In other words, the inlet 23 and the outlet 25 are formed on the same circumference of the hollow portion 21 of the cylindrical shape.

The piston 30 is cylindrically seated on one side of the hollow portion 21 of the housing 20 and reciprocates. The piston 30 may be reciprocated by an actuator or reciprocated by a ball screw rotated by a motor 60 ', and the stroke length of the piston 30 is controlled by a user. . The control method of stroke length can be controlled by attaching a position sensor or can be controlled by mechanical or electronic methods.

The rotary hole 40 is cylindrical like the piston 30, and a moving path through which the fluid can move is formed at a portion where the inlet 23 is located. The moving path is a passage through which fluid can flow, and one end is selectively communicated with the inlet 23 and the outlet 25, and the other side is connected to the hollow part 21.

The moving path may be formed in various shapes. As shown in FIG. 3, a through hole 41 bent into a “b” shape is formed so that one end is selectively provided at the inlet 23 and the outlet 25. It is connected and the other end is connected to the hollow portion 21.

And the rotary sphere 40 is rotated at a predetermined angle, it is rotated at a constant angle by a servo motor or step motor. As is well known, the servo motor is an electric motor for driving a servo mechanism which is an automatic control mechanism by feedback control. A sensor for detecting position and speed is attached to the shaft end of the servomotor or a moving part of a driven mechanism, and target values such as position, speed, azimuth, and posture are corrected by comparing the sensor signal with a command value. To control the servomotor. Power failure and reversal are possible, operation at low speed is smooth and rapid acceleration and deceleration are possible. In addition, the step motor is a motor that rotates in accordance with the step by receiving a digital pulse to be able to precisely control the rotation angle.

The housing 20, the piston 30, and the rotating hole 40 are made of a ceramic material so as to discharge a strong acid or strong alkaline substance in a quantitative manner. The ceramics refer to materials such as oxides, nitrides, carbides, etc., which use inorganic materials as the main raw materials, and these ceramic materials generally have corrosion resistance compared to metal materials and organic materials. It has very high heat resistance, abrasion resistance, etc. and occupies the most important position among modern industrial materials with various functions (electromagnetic function, mechanical function, optical function, biological function, etc.). Since the ceramic used in the present invention must maintain not only acid resistance but also high strength and abrasion resistance, a ceramic mainly composed of Monolith or TiB2, ZrB2, Si3N4 is used.

As shown in FIG. 7, only the portion of the fluid moving in the housing 20 or the surfaces of the piston 30 and the rotating hole 40 may be coated with ceramic 50.

Ceramic coating is a coating of the metal surface with ceramics with good corrosion resistance, heat resistance and abrasion resistance. The ceramic coating is performed to avoid rusting of the metal as a device used in a high temperature or corrosive environment or as a household appliance. . Such ceramic coating may be selected from among enamel coating, thermal spraying and chemical vapor deposition.

5 and 6 show another embodiment, the movement path formed in the rotary sphere 40 is composed of a chamfer 43, the end of the rotary sphere 40 is cut at a certain portion. In the case of forming the moving path into the shape of the chamfer 43, the advantage that the work process is simple.

Operation according to the above configuration of the present invention will be described in detail with reference to Figs.

The liquid substance contained in the tank 70 is connected to the inlet 23 of the housing 20, and the outlet 25 is connected to the needle 80 by the actuator 30 by the actuator. When moved, negative (-) pressure is generated in the hollow portion 21 of the housing 20 and flows into the inside through the inlet 23. After the piston 30 has retracted to a predetermined position, the rotary hole 40 is rotated at a predetermined angle to a position where the movement path is in communication with the discharge port 25 by the step motor (or servo motor).

In this state, when the piston 30 is straight, the liquid filled in the hollow portion 21 is discharged to the outside through the discharge port (25).

In the embodiment of the present invention, the piston 30 has been described as reciprocating, but it is sufficient that the piston 30 and the housing 20 make relative movement. And the rotation angle of the rotary sphere 40 and the stroke length of the piston 30 is determined by the operation of the servo motor and the actuator, the discharge amount is discharged is determined by the stroke length of the piston (30).

According to the above-described configuration of the present invention, it is possible to reliably discharge the fixed quantity while being mounted on the discharging device, and to reduce the manufacturing cost by simplifying the construction, and also increase the corrosion resistance and durability by the ceramic, so that The same substance can also be discharged quantitatively.

What has been described above is just one embodiment for carrying out the liquid quantitative suction discharge unit according to the present invention, the present invention is not limited to the above-described embodiment, as claimed in the following claims of the present invention Without departing from the gist of the present invention, one of ordinary skill in the art will have the technical idea of the present invention to the extent that various modifications can be made.

Claims (11)

In the suction discharging unit mounted on the discharging device for discharging the liquid substance quantitatively, A housing having a cylindrical hollow portion penetrating therein and having an inlet and an outlet communicating with the hollow portion; A piston seated on one side of the hollow part of the housing in a cylindrical shape and reciprocating with a constant stroke length; One side is selectively connected to the inlet or outlet and the other side is formed with a moving path to communicate with the hollow portion, the cylindrical rotating sphere seated on the hollow portion of the housing rotated at a predetermined angle; This increased liquid metering suction unit The liquid quantitative suction discharging unit according to claim 1, wherein the housing, the piston, and the rotating tool are made of a ceramic material. The method of claim 1, wherein the hollow portion of the housing, the inner surface of the inlet and the outlet is coated with a ceramic material, the surface of the piston and the rotary port is also coated with a ceramic material characterized in that the durability of the increased liquid quantitative Suction discharge unit. The liquid quantitative suction discharging unit according to any one of claims 1 to 3, wherein the moving path formed in the rotary hole is formed by a through hole formed by a letter “b”. The liquid quantitative suction discharging unit according to any one of claims 1 to 3, wherein the moving path formed in the rotary tool includes a chamfered portion in which an end portion of the rotary tool is cut at a portion. The liquid quantitative suction dispensing unit according to any one of claims 1 to 3, wherein the outlet and the outlet are orthogonal at an angle of 90 degrees. The liquid quantitative suction dispensing unit according to any one of claims 1 to 3, wherein the rotary tool is rotated at a predetermined angle by a servomotor. The liquid quantitative suction dispensing unit according to any one of claims 1 to 3, wherein the rotary tool is rotated at an angle by an actuator. The liquid quantitative suction dispensing unit according to any one of claims 1 to 3, wherein the rotating tool is rotated at a predetermined angle by a step motor. The liquid quantitative suction discharging unit according to any one of claims 1 to 3, wherein the piston reciprocates by an actuator. 4. The liquid quantitative suction dispensing unit according to any one of claims 1 to 3, wherein the piston reciprocates by a ball screw rotated by a motor.

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