KR20180003376A - Large area UV curing system with multiple LED row - Google Patents

Abstract

The present invention provides a large area UV curing system with double row LEDs oppositely installed in a product transfer unit (10). The large area UV curing system comprises: a UV irradiation unit (20) which supports LED modules (22) such that the LED modules are capable of being additionally installed in a straight line shape on a frame (21); a cooling unit (30) which makes cooling air flow from a side ventilation hole (31) of the LED modules (22) to an upper ventilation hole (32) of the LED modules (22); an adjusting unit (40) which supports the LED modules (22) such that irradiation postures of the LED modules (22) on the frame (21) are variable; and a control unit (50) which is connected to the UV irradiation unit (20), the cooling unit (30) and the adjusting unit (40) to operate the UV irradiation unit (20), the cooling unit (30) and the adjusting unit (40) with a set algorithm. Therefore, the large area UV curing system according to the present invention has an effect of promoting improvements of flexibility and productivity in the process management by variably adjusting light concentrating conditions correspondingly to the shape of the product in a mass production process of curing a resin product based on double rows of LED lamps.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a large area UV curing system,

The present invention relates to a UV curing system, and more particularly to a return LED based large area UV curing system that performs curing of a resin product based on a double LED lamp in a production line.

In general, UV LED curing is applied to various products coated with ultraviolet curable resin containing photoinitiator, and it has been attracting attention as a technology for enhancing the properties such as surface hardness, surface gloss and electrical insulation as well as improving the environment friendliness and productivity at the manufacturing site. In particular, when a highly efficient LED light source is used as a UV curing lamp, the size and power consumption of the equipment can be reduced compared to a general UV lamp. However, increasing the flexibility of the process by fusing the products to the line at the production site is recognized as a product that improves productivity.

Korean Patent Publication No. 2013-0120568 (Prior Art 1) and Korean Patent Registration No. 1623299 (Prior Art 2) are known as prior art documents which can be referred to in connection with UV curing.

The prior art 1 comprises a first module in which LEDs are arranged on a first surface; A second module in which the LEDs are arranged on a second side; A connection unit for connecting the first module and the second module so as to have a predetermined angle; And a cover covering the first module, the second module, and the connection portion. Therefore, it is expected that the effect of the present invention can be applied to a medium or large conveyor type curing apparatus by solving thermal deformation and quality deterioration.

Prior Art 2 discloses a light emitting device comprising a light irradiation head having a plurality of LED modules through a heat sink in a housing; A power supply connected to the plurality of LED modules to apply power; Cooling means for enclosing the heat sink of the LED module with a water-cooled jacket; And control means for maintaining the heat generation temperature and the light output of the LED module at a set range. Therefore, it is expected that the maximum light output of 10,000 mw / cm 2 or more can be realized in the large-area UV curing

According to the above-mentioned prior art, although the applicability to the mass production sites of medium and large products can be expected to some extent, the design elements for the mass production line which can handle small quantity production of various kinds of products are not reflected and it shows limitations.

1. Korean Registered Patent Publication No. 2013-0120568 entitled "UV-curing machine using LED" (published on November 3, 2013). 2. Korean Patent Registration No. 1623299 entitled "UV LED curing device for large area coating" (published on May 20, 2016).

In order to solve the above-mentioned problems, it is an object of the present invention to solve the above-mentioned problems in the prior art, and it is an object of the present invention to provide an LED lamp, Based large-area UV curing system.

In order to achieve the above object, the present invention provides a double-row LED-based large area UV curing system installed against a conveying portion of a product, comprising: a UV irradiating portion for extensively supporting an LED module in a straight line on a frame; A cooling unit for allowing the cooling air to flow from a side ventilation port to an upper ventilation port of the LED module; An adjuster for variably supporting an irradiation posture of the LED module on the frame; And a control unit connected to the UV irradiation unit, the cooling unit, and the control unit in a controlled algorithm.

In the detailed construction of the present invention, the LED module of the UV irradiation unit is provided with three to five rows of lamps on the lower side and a connector for direct-parallel driving of the lamps on the upper side.

In a detailed configuration of the present invention, the cooling section further includes a thermoelectric element cooler in a region adjacent to the lamp in a flow path of the air.

According to a further embodiment of the present invention, the adjusting portion includes at least one of a movable table for causing a tilting motion of the set lamp and a swinging table for causing horizontal movement of the set lamp.

In the detailed configuration of the present invention, the control unit stores the on-off patterns of the respective lamps corresponding to the shape of the product, and detects the temperature and the thermal image on the transfer unit so as to coincide with the stored pattern.

As described above, according to the present invention, in the mass production process for performing curing of a resin product based on a double-row LED lamp, the flexibility and productivity of the process management can be improved by variably controlling the condensing condition corresponding to the shape of the product have.

Figure 1 is a schematic representation of a system according to the present invention in its entirety;
Fig. 2 is a schematic view showing the UV irradiation unit according to the present invention in the width direction
Fig. 3 is a schematic view showing the UV irradiation unit according to the present invention in the longitudinal direction
Fig. 4 is a schematic view showing a control section according to the present invention together with a partial enlargement
5 is a block diagram schematically showing a control unit according to the present invention.
6 is a schematic diagram showing a test result of the system according to the present invention;

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

The present invention proposes a large area UV curing system based on return LEDs mounted against the transfer portion 10 of the product. In particular, the UV LED type curing apparatus that replaces the UV bulb of the I-line (i-line) process during the display manufacturing process is targeted, but is not necessarily limited thereto. The large area is based on the irradiation area of 2345 mm x 200 mm, but is not limited thereto. The conveying unit 10 conveys the product at a constant speed using a known conveyor 12. It is preferable that the driver 15 connected to the conveyor 12 via a gear or a chain is configured to be capable of precise speed and position control.

According to the present invention, the UV irradiating unit 20 is a structure in which the LED module 22 can be additionally supported on the frame 21 in a straight line. The frame 21 of the UV irradiating unit 20 can be made of an aluminum alloy profile which is lightweight and has good mechanical strength and heat resistance. Fig. 3 illustrates a state in which five LED modules 22 are installed on one linear frame 21. Fig. Each LED module 22 has a plurality of lamps 24 for UV light emission.

The LED module 22 of the UV irradiating unit 20 includes the lamp 24 of three to five rows on the lower side and the connector 28 ). 2 illustrates a state in which four lamps 24 are mounted on the COB 25 by cutting the LED module 22 in the width direction. The three to five lamps 24 are advantageous in terms of economy of equipment for large area curing and maintaining a uniform temperature distribution as described below. 5 illustrates a state in which eight connectors 28 are configured for one LED module 22. The serial-parallel driving of the LED module 22 ensures the operation of the remaining lamps 24 even if any one of the lamps 24 is turned off due to a failure, thereby preventing defective products.

In addition, according to the present invention, the cooling unit 30 allows the cooling air to flow from the side air vents 31 to the upper air vents 32 of the LED module 22. 2 illustrates a state in which air is drawn in from the ventilation hole 31 on the front side and the ventilation hole 31 on the rear side and is discharged through the cooling fan 36 on the upper side. If the cooling air flows into the lower conveying portion 10 in the large-scale curing, the uniformity of the temperature distribution may be influenced. On the ventilation openings 31 and 32, a ventilation net 33 of a mesh type is installed to block the inflow of foreign matter.

In the detailed construction of the present invention, the cooling unit 30 further includes a thermoelectric cooler 35 in a region adjacent to the lamp 24 in the air flow path. The cooling section 30 discharges heat generated in the plurality of lamps 24 on the LED module 22 through the flow path passing through the upper surface of the lamp 24. [ The thermoelectric element cooler 35 has a structure in which a thermoelectric element is mounted on a heat radiating plate, so that the thermoelectric cooler 35 performs more precise and forcible cooling in response to a temperature change at a work site depending on the season.

In addition, according to the present invention, the regulating unit 40 supports the irradiation posture of the LED module 22 on the frame 21 in a variable manner. The control unit 40 divides the lamps 24 mounted on the LED module 22 into a plurality of groups, and allows each group to simultaneously change the irradiation position. As will be described later, the irradiation posture fluctuation of the UV light is intended to achieve an optimal temperature distribution corresponding to the shape of the product to be introduced.

As a detailed configuration of the present invention, the adjustment portion 40 includes at least one of an inclined stage 42 that causes inclination of the set lamp 24 and a swing band 46 that causes horizontal movement of the set lamp 24 . In FIG. 2, the adjusting unit 40 illustrates a state in which the inclined stage 42 is installed on the upper side of the lamp 24. In FIG. 4, the adjusting unit 40 includes the inclined stage 42 and the swing platform 46 An example is shown. The inclined stage 42 is constituted by connecting a hinge shaft 44 and a movable unit 48 to one side and varies the irradiation angle of the lamp 24 in the width direction or the longitudinal direction to enlarge or reduce the irradiation area. The swing platform 46 is constituted by connecting a movable unit 48 on a guide rail (not shown), and causes no fluctuation in the size of the irradiation area, but causes a reciprocating movement in a set direction.

At this time, the movable unit 48 of the inclined stage 42 may be composed of a worm gear and a motor, and the movable unit 48 of the swinging pedestal 46 may be composed of a cam and a motor. It is preferable that the inclined stage 42 is configured to be applied to the outermost column when the lamp 24 is in the third row or the fourth column while the swing band 46 is configured to be applied as a whole irrespective of the heat of the lamp 24 . In any case, the control unit 40 maintains a uniform curing temperature distribution corresponding to the shape of the large area product as it prevents the concentration of the point light source irradiation.

According to the present invention, the control unit 50 is connected to the UV irradiation unit 20, the cooling unit 30, and the control unit 40 in a predetermined algorithm. The control unit 50 is based on a controller 51 installed remotely and locally and has an operation unit 52 and a power supply unit 53 locally. The controller 51 includes a microprocessor, a memory, and a microcomputer circuit having an input / output interface.

The signal line and the power line for the operation of the cooling unit 30, the control unit 40, and the control unit 50 are connected to each other through the connector 28.

In the detailed configuration of the present invention, the control unit 50 stores the on-off patterns of the respective lamps 24 corresponding to the shape of the product, detects the temperature and the thermal image on the transfer unit 10, And a control unit. The temperature is detected through the temperature detector 57 at a position adjacent to the conveyor 12 of the transfer section 10. [ An infrared camera 55 provided adjacent to the UV irradiating unit 20 acquires a thermal image for the transfer unit 10. The algorithm stored in the controller 51 includes flashing pattern data of the lamp 24 in addition to the main program and the subroutine program. For example, when the product is T-shaped, the lamp 24 is operated so as to be irradiated in a form close to the T-shape, thereby maintaining unnecessary power consumption while keeping the temperature uniform.

6 (a), the uniformity of the light intensity is maintained in the longitudinal direction of the LED module 22, but the light uniformity in the width direction of the LED module 22 may be set to be different as shown in FIG. 6 (b).

As an example of the operation, the controller 51 inputs information on the shape of a product to be put into operation, stops the conveyor 12 of the conveying unit 10 at a predetermined position, and determines an irradiation pattern corresponding to the shape of the product do. That is, whether or not the corresponding row of the lamp 24 is lit or turned off and the tilt angle are determined on each of the LED modules 22, and it is determined whether or not the swing band 46 requires reciprocating shaking. Subsequently, a signal is inputted through the thermal imaging camera 55 and the temperature detector 57 while the UV irradiating unit 20 is operated in a predetermined pattern, and the normal UV of the product in conjunction with the cooling unit 30 and the regulating unit 40 Curing is performed, but if the abnormal state continues for more than the set time, all processes are stopped and an alarm is generated.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: conveying part 12: conveyor
15: actuator 20: UV irradiator
21: Frame 22: LED module
24: lamp 25: COB
28: connector 30: cooling section
31, 32: ventilation hole 33: ventilation hole
35: thermoelectric cooler 36: cooling fan
40: regulating part 42: ramp
46: swing band 48: actuator
50: control unit 51:
52: Actuator 53: Power supply
55: infrared camera 57: temperature detector

Claims (5)

A large area UV curing system based on a return LED installed against a transfer part (10) of a product, comprising:
A UV irradiating portion 20 for extensively supporting the LED module 22 in a straight line on the frame 21;
A cooling unit 30 for allowing the cooling air to flow from the side air vents 31 of the LED module 22 to the upper air vents 32;
An adjustment unit (40) for variably supporting an irradiation posture of the LED module (22) on the frame (21); And
And a control unit (50) connected to the UV irradiation unit (20), the cooling unit (30), and the control unit (40) while being operated by a predetermined algorithm. The method according to claim 1,
The LED module 22 of the UV irradiating unit 20 is provided with three to five rows of lamps 24 on the lower side and a connector 28 for driving the lamps 24 in series- Based LED large area UV curing system. The method according to claim 1,
Wherein the cooling unit (30) further comprises a thermoelectric cooler (35) in a region adjacent to the lamp (24) in the air flow path. The method according to claim 1,
The controller 40 may include at least one of a movable table 42 for causing a tilted movement of the set lamp 24 and a swing table 46 for causing horizontal movement of the set lamp 24 Return LED large area UV curing system. The method according to claim 1,
Wherein the control unit (50) stores on / off patterns of the respective lamps (24) corresponding to the shape of the product, and detects the temperature and the thermal image on the transfer unit (10) LED based large area UV curing system.

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