KR19990085018A - Full filling system of high viscosity liquid - Google Patents

Abstract

The present invention is a conventional damper liquid filling method is a bubble to the damper liquid or difficult to apply a fixed amount of the product is weakened the performance of the product, the longer working time due to the damper liquid filling and curing, and the needle to prevent the occurrence of bubbles at the filling site Because it is inconvenient to clean the end of the; A two-axis needle in which a damper injection unit injects damper liquid into the optical pick-up assembly, is provided at the tip, and a metering valve for injecting damper liquid by a predetermined amount, an X-direction adjusting stage for moving the metering valve in the X-axis direction, and the metering valve Y-direction adjusting stage for moving the unit in the Y-axis direction, θ-direction adjusting unit for rotating the metering valve, a tilt adjusting unit for adjusting the inclination of the metering valve, LM cylinder for moving the metering valve in the vertical direction, A pin cylinder configured to allow two-stage injection by moving the metering valve upward by a predetermined amount; The use of two-axis needles facilitates the filling of high-viscosity liquids, and enables continuous quantitative application through two-stage application, as well as the automatic injection of high-viscosity liquids, resulting in increased operator convenience and reduced work time resulting in increased productivity. Relates to a full filling system.

Description

Full filling system of high viscosity liquid

The present invention relates to a system for filling a liquid with high viscosity into a pressure tank. Particularly, a liquid having a high viscosity at a specific site has no bubble at the filling portion and no residual amount at the end of the needle, and thus continuous quantitative coating is applied to ultraviolet rays. A complete filling system of high viscosity liquid to cure.

The optical pickup assembly is a key component in a computer's CD-ROM driver, audio CD player, etc. that uses a laser to read and transmit CD records. At this time, the optical pick-up assembly is a CD through its various component units and act assembly, and also receives the laser through the act assembly and the various component units and transmits the information recorded on the CD to the outside.

Figure 1 schematically shows a general optical pickup assembly in which a laser passes through an objective lens 2 seated on a bobbin 1 of the optical pickup assembly, which is the disc when the laser passes through the objective lens 2. There is a prize in. Therefore, since the bobbin 1 should be focused at the correct position, the bobbin 1 should be moved up, down, left and right. The bobbin 1 is connected to the frame 4 by a wire 3, and by applying a voltage to the bobbin 1 to form a magnetic field around the bobbin 1 can be moved to a desired position.

At this time, the amount of the damper liquid 5 under the bobbin 1 is excessive, or the characteristics of the damper appear differently depending on the degree of unfilling, internal bubble generation, and hardening, in which case the laser beam is applied to a constant applied voltage. You will not be able to move to the correct focus position, making the CD record unreadable. That is, when the amount of damper liquid 5 is high or the hardening is reduced, the amount of movement of the bobbin 1 is reduced, and when the amount of the damper liquid 5 is low or the curing is less, the movement of the bobbin 2 is increased. do.

Therefore, the irradiation amount of Ultra Violet (hereinafter, referred to as UV) is made constant, and the amount of the damper liquid 5 must be adjusted to about 0.1 mm with respect to the upper surface of the frame 4.

The present invention relates to a device for filling the damper liquid into the frame of the optical pickup assembly.

Conventional damper liquid filling method comprises a step of filling the damper liquid using the damper liquid filling barrel shown in Figure 1, and the step of curing the damper liquid using the UV irradiation jig shown in FIG. have.

The damper liquid filling barrel is provided with a barrel 11 filled with damper liquid, an air supply unit 10 for supplying air to the barrel 11, and a tip of the barrel 11 inserted into the frame. It consists of a needle 12 for filling damper liquid, and a switch 13 for opening and closing between the barrel 11 and the needle 12.

Further, the UV irradiation jig irradiates ultraviolet rays to cure the damper liquid, the die 16 on which the object filled with the damper liquid is placed, and the die 16 to the UV irradiation unit 14. It consists of the linear movement guide 15 which guides.

In the conventional damper liquid filling method configured as described above, a manual worker performs filling and curing of the damper liquid directly.

After the damper liquid is contained in the barrel 11, the manual worker inserts the needle 12 into the inside of the frame to be filled and moves the hand 13 while operating the switch 13 attached to the barrel 11 to control the damper liquid. do. When the barrel 11 and the needle 12 communicate with each other by the operation of the switch 13, the damper liquid pressurized by air is filled into the frame through the needle 12. At this time, the manual worker should wipe the end portion of the needle 12 before filling the damper liquid to remove the damper liquid formed at the end.

Subsequently, the optical pickup assembly is seated on the die 16 to cure the damper liquid filled in the frame, and the die 16 is moved to the UV irradiator 14 using the linear movement guide 15. The UV irradiator 14 irradiates ultraviolet rays to the optical pickup assembly to cure the damper liquid.

However, the above-described conventional damper liquid filling method is difficult to enter the damper liquid or difficult to apply a fixed amount of the product weakens the performance of the product, the longer the working time due to the damper liquid filling and curing, and to prevent the occurrence of bubbles at the filling site There is an uncomfortable problem because you need to wipe the end of the needle.

That is, when the capacity of the barrel 11 is about 30 ml so small that the damper liquid needs to be refilled in the barrel 11 after one hour, bubbles may enter when the damper liquid is filled in the barrel 11. In addition, it is difficult to apply the quantitatively because the switch 13 must be operated while the operator checks the filling amount of the damper liquid with the naked eye during the injection, and the damper liquid is excessively charged or not filled, the internal bubble is generated, and the degree of hardening is the characteristic of the damper. As this appears differently, the optical pickup assembly cannot read the CD record correctly.

In addition, since the manual worker has to perform both damper liquid filling and UV curing, the working time is long as about 19 seconds, and the needle is moved to the inside of the part to be filled in order to prevent bubbles from filling. You will need to clean the tip of the needle every time you work, leaving some remaining charge.

The present invention has been made in order to solve the above problems of the prior art, by the injection and hardening of the damper is made automatically, to quantitatively apply the damper liquid to ensure the reliability of the product quality and to reduce the working time The purpose is to provide a full filling system of high viscosity liquids to improve productivity and increase operator convenience.

1 is a block diagram showing a general optical pickup assembly,

2 is a configuration diagram showing a conventional damper liquid filling barrel,

3 is a configuration diagram showing a conventional UV irradiation jig,

Figure 4 is a block diagram showing a complete filling system of high viscosity liquid according to the present invention,

5 is a view showing a damper liquid injection unit according to the present invention,

5A is a front view, FIG. 5B is a side view,

6 is a block diagram of a dispenser that is a main part of the present invention;

7 is a flowchart illustrating a damper filling operation in a high viscosity liquid filling system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

50 damper liquid injection unit 51 metering valve

52: 2-axis needle 53: LM cylinder

54: pin cylinder 55: X direction adjustment stage

56: Y direction adjustment stage 57: θ direction adjustment unit

58: tilt adjustment unit 59: walk detection sensor

61: index table 62: seating die

63: UV irradiation device 64: UV protection cover

65: area sensor 71: pressure tank

72: dispenser controller

The present invention for achieving the above object is a system for automatically filling a high viscosity damper liquid into the frame of the optical pickup assembly using a damper injection unit, the damper injection unit is a two-axis to inject the damper liquid into the optical pickup assembly A metering valve installed at the tip of the needle to inject damper liquid by a predetermined amount, an X-direction adjusting stage for moving the metering valve in the X-axis direction, a Y-direction adjusting stage for moving the metering valve in the Y-axis direction, and the metering The θ direction control unit for rotating the valve, the tilt control unit for adjusting the inclination of the metering valve, the LM cylinder for moving the metering valve in the vertical direction, and the two-step injection by moving the metering valve up to a certain degree to enable It is characterized by consisting of a pin cylinder.

In addition, an index table on which the optical pick-up assembly is mounted and rotation is performed, a plurality of mounting dies installed at a plurality of angles on the upper side of the index table, and mounted on one side of the index table; And a damper injection unit for filling damper liquid into the frame of the optical pickup assembly, a walk sensor for detecting the presence of the optical pickup assembly at the lower portion of the damper injection unit, and an area sensor for detecting an initial position of the seating die. And a UV irradiation apparatus installed at one side of the index table to cure the damper liquid by irradiating ultraviolet rays to the frame of the optical pickup assembly, and an ultraviolet ray installed across the upper side of the index table and irradiated from the UV irradiation apparatus. With UV blocking cover to block the reflection to the damper injection unit side The generated features.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The complete filling system of high viscosity liquid according to the present invention includes an index table 61 for placing an optical pickup assembly and rotating the optical pickup assembly as shown in FIGS. 4 to 6, and the index table 61. A plurality of seating dies 62 installed at a predetermined angle on the upper side of the optical pickup assembly, and a damper injection unit 50 installed at one side of the index table 61 to fill the frame of the optical pickup assembly with damper liquid. ), A walk detection sensor 59 for detecting the presence of an optical pickup assembly at the lower portion of the damper injection unit 50, an area sensor 65 for detecting an initial position of the seating die 61, and the UV irradiation device 63 is installed on one side of the index table 61 and irradiates ultraviolet rays to the frame of the optical pickup assembly to cure the damper liquid, and crosses the upper side of the index table 61. Multiple is provided consists of a UV protection cover (64) that blocks the ultraviolet radiation from the UV irradiation device 63 reflected toward the damper injection unit 50.

The damper injection unit 50 has a two-axis needle 52 for injecting damper liquid into the optical pick-up assembly at the tip and a metering valve 51 for injecting damper liquid by a predetermined amount, and the metering valve 51 with an X-axis. X direction adjusting stage 55 for moving in the direction, Y direction adjusting stage 56 for moving the metering valve 51 in the Y-axis direction, and θ direction adjusting part 57 for rotating the metering valve 51. ), An inclination adjustment unit 58 for adjusting the inclination of the metering valve 51, an LM cylinder 53 for moving the metering valve 51 in the vertical direction, and the metering valve 51 to a certain degree. It consists of a pin cylinder (54) to move up to enable two-stage injection, and a workpiece detection sensor (59) for detecting the presence or absence of the optical pickup assembly in the damper liquid injection process.

Here, the damper injection unit 59 is installed so as to inject the damper liquid into the frame of the optical pick-up assembly in a second delay with a predetermined delay time by varying its height. In addition, a large amount of damper liquid is filled, and a pressure tank 71 for supplying damper liquid to the metering valve 51 through a flow path in accordance with the supply of main air, and for controlling the damper liquid discharge of the metering valve 51. A dispenser system composed of the dispenser controller 72 is provided.

The high-viscosity liquid full filling system of the present invention configured as described above puts the optical pickup assembly on the index table and injects a damper while irradiating the index table and irradiates UV rays for UV curing.

According to the process of injecting the damper liquid into the frame of the optical pickup assembly and UV curing, the index table 61 is configured in a six station structure as shown in FIG. In the first stage, the worker takes out the finished optical pickup assembly and places the new optical pickup assembly to be worked on the mounting die 62. Thereafter, the index table 61 automatically rotates one station (60 °) for a preset time (about 10 seconds).

At this time, when the area sensor 65 is turned on, the index table 61 stops automatic rotation and stops while the area sensor 65 remains on, and then rotates again when the area sensor 65 is turned off. do. This is to set the initial position of the mounting die 62 while the area sensor 65 is turned on, and to perform the damper injection operation.

In the second stage, the metering valve 51 is lowered by the LM cylinder 53 to both sides of the optical pickup assembly to inject and ascend the damper liquid. The fourth stage and the fifth stage irradiate ultraviolet rays at a desired time and amount of light using the UV device 63 to cure the damper liquid of the optical pickup assembly. Here, the third stage and the sixth stage are stand-by processes to add the UV device 63 when reducing the overall process time, the UV blocking cover 64 is the UV device 63 is irradiated with UV light 63 When the ultraviolet rays are irradiated to the damper injection unit 50 side to prevent the damper liquid from hardening prematurely.

The damper liquid injection unit 50 includes an X direction stage 55, a Y direction stage 56, a θ direction adjusting part 57, and an inclination adjusting part 58 so as to adjust an accurate position when filling the optical pickup assembly with the damper liquid. To set the direction and position of the needle 52. Since the shape of the frame portion in which the damper liquid is filled is a deep W groove, the biaxial needle 52 is applied to correspond to the special shape of the filling portion.

In general, when discharging a high viscosity liquid, a high viscosity liquid is buried at the end of the needle depending on the shape of the injection part, which makes it difficult to apply a fixed amount. Thus, after the discharged liquid is discharged, the end of the biaxial needle 52 is discharged. In order to prevent direct contact with the surface of the needle, the surface tension of the injection part of the frame is greater than the surface tension of the needle end, and a two-stage coating structure and a time delay are allowed to maintain a constant distance at all times.

When the optical pickup assembly is in the damper liquid injection process (second stage), the work detection sensor 59 determines whether the optical pickup assembly is present, and when the optical pickup assembly is present, the LM cylinder 53 is lowered to make the biaxial needle 52 Inside the frame of the optical pickup assembly. The biaxial needle 52 firstly injects the damper liquid at the first stage, has a delay time of about 0.2 seconds, and then raises the pin cylinder 54 to the second stage. Inject once.

At this time, in order to make the surface tension of the frame greater than the surface tension of the biaxial needle 52 after the damper liquid is injected at the second stage height, the predetermined distance is maintained at the second stage height, and a delay time of about 4 seconds is applied to the LM cylinder. The process of raising 53 and the pin cylinder 54 is advanced. Therefore, even after the damper liquid is injected into the frame, there is no bubble at all times and the damper liquid is not buried at the end of the biaxial needle 52, thereby enabling automated continuous operation.

Here, the height between the end of the biaxial needle 52 and the damper liquid after the damper liquid application is 1 mm at the first stage height and 5 mm at the second stage height. When production is increased to reduce the tack time of the device, the UV device 63 is added to the index table 61 so that the tack time is maintained for about 7 seconds.

In addition, in the prior art configuration, when the damper liquid is used in the barrel, there is an inconvenience in that the damper liquid must be put back into the barrel every hour due to the limitation of the barrel capacity, and when the damper liquid is added, bubbles are mixed and workability is deteriorated. Therefore, in this invention, the dispenser system is provided.

The dispenser system supplies the damper liquid from the pressure tank 71 filled with a large amount of damper liquid to the biaxial needle 52 through the metering valve 51. At this time, the air introduced through the air pipe causes the damper liquid of the pressure tank 71 to move to the metering valve 51, and the dispenser controller 72 controls the damper liquid ejecting action of the metering valve 51.

As described above, the high viscosity liquid full filling system of the present invention uses two-axis needles for easy filling of high viscosity liquids, and enables continuous quantitative application through two-stage application, as well as automatic injection of high viscosity liquids, thereby improving operator convenience. There is an advantage that the productivity is improved by reducing the working time.

Claims (4)

In a system for automatically filling a high viscosity damper liquid into the frame of the optical pickup assembly using a damper injection unit, The damper injection unit includes a metering valve installed at a tip of a two-axis needle for injecting damper liquid into the optical pickup assembly and injecting damper liquid by a predetermined amount, an X-direction adjusting stage for moving the metering valve in the X-axis direction, and the metering Y-direction adjusting stage for moving the valve in the Y-axis direction, θ-direction adjusting unit for rotating the metering valve, tilt adjusting unit for adjusting the inclination of the metering valve, and LM cylinder for moving the metering valve in the vertical direction And a pin cylinder for allowing two-stage injection by moving the metering valve upward to a certain degree, and a workpiece detection sensor for detecting the presence or absence of an optical pickup assembly in a damper liquid injection process. The method of claim 1, The damper injection unit is a full filling system of high viscosity liquid, characterized in that when the injection of the damper liquid to the frame of the optical pickup assembly by varying the height after a certain delay time to be injected over a second. The method of claim 1, And a dispenser system comprising a pressure tank for filling a large amount of damper liquid and supplying damper liquid to the metering valve through a flow path according to the supply of main air, and a dispenser controller for controlling the damper liquid discharge of the metering valve. Filling system for high viscosity liquids. An index table on which an optical pick-up assembly is mounted and rotation is performed, a plurality of mounting dies installed at a plurality of angles on an upper side of the index table, and mounted on one side of the index table, A damper injection unit for filling damper liquid into the frame of the optical pickup assembly, a walk detection sensor for detecting the presence of the optical pickup assembly at the lower portion of the damper injection unit, an area sensor for detecting an initial position of the seating die; UV irradiation device which is installed on one side of the index table and cures the damper liquid by irradiating ultraviolet rays to the frame of the optical pickup assembly, and the ultraviolet rays installed across the upper side of the index table and irradiated from the UV irradiation device is damper injection Consists of UV blocking cover to block the reflection to the unit side The high viscosity of the liquid completely filling system, characterized in that.