WO2020096129A1

WO2020096129A1 - Ultraviolet light curing apparatus for improving curing performance of three-dimensional stack

Info

Publication number: WO2020096129A1
Application number: PCT/KR2018/015495
Authority: WO
Inventors: 김정일; 신영식; 오윤상; 윤재민; 심명규; 홍현기; 김정수; 박성열; 김찬호; 조성환
Original assignee: 주식회사 덴티스
Priority date: 2018-11-05
Filing date: 2018-12-07
Publication date: 2020-05-14
Also published as: KR102193213B1; KR20200054946A

Abstract

The present invention relates to an ultraviolet light curing apparatus for improving the curing performance of a three-dimensional stack, the ultraviolet light curing apparatus being characterized by comprising: a housing having an empty inside and formed to be openable and closable through a door on the front surface thereof; a holder which is formed in an inner lower portion of the housing and on which the three-dimensional stack can be held; and a curing unit which is formed on the inner surface of the housing and irradiates the outer surface of the three-dimensional stack with ultraviolet light to perform curing.

Description

UV light curing device to improve the curing performance of 3D laminates

The present invention relates to an ultraviolet light curing device for improving the curing performance of a three-dimensional laminate, and when curing the three-dimensional laminate output to a 3D printer, the three-dimensional laminate cured using ultraviolet rays of different wavelengths It relates to an ultraviolet light curing device for improving the curing performance of the three-dimensional laminate to improve the strength and shrinkage.

The 3D printing technology, which is spotlighted as the next-generation precision processing technology, refers to a technology for producing a three-dimensional object by laminating in a set shape by spraying materials in the X-axis, Y-axis, and Z-axis directions while the material is melted.

This 3D printing technique usually reconstructs a two-dimensional cross-section continuously to produce a three-dimensional laminate by laminating while printing the molten material layer by layer, and since the three-dimensional laminate is made of molten material, it is hardened to fix the shape. A curing process is essential.

In general, a method using heat (Fused Deposition Modeling: FDM), laser (Selective lasersintering: SLS), UV light (Stereolithography Apparatus: SLA, Digital Light Processing: DLP) is commonly used as a means for curing.

However, in the material curing method using heat, a support is essential in the material curing process, and the time required in the production process is large, and the material curing method using a laser requires a large work space for laser generation and the process cost There was a problem that the burden was large.

Accordingly, a material curing method using UV (Ultraviolet) capable of obtaining a high-quality output is preferred because the burden on production time and production maintenance cost is relatively less.

However, the UV curing method uses a UV lamp as described above, but there is a problem in that curing is not properly performed due to high heat generated when the UV lamp emits light.

Korean Patent Publication No. 10-2015-0066898 for solving such a problem relates to a curing device using a UV-LED module, which is disposed on a transport path for transporting a curing object or an exposure object, and on the transport path of the transport unit, It comprises a body part that hardens the object to be cured to be transported through the transfer part or forms a pattern on the object to be exposed, and an upper surface inside the body part is provided with a UV light source on the surface of the object to be cured or the object to be exposed passing through the body part A first light source main body mounted with a first light source module made of a first UV-LED and a first substrate is arranged to be irradiated, and UV light sources are provided on both side surfaces of the lower end of the main body part to pass through the main body. Arrange the second light source body on which the second light source module made of the second UV-LED and the second substrate is mounted to irradiate, and 1 and 2, the light source unit is characterized in that configuration by placing at least one or more parts of the first radiation consisting of a heat pipe so as to dissipate heat generated in the second UV-LED irradiating each UV light source.

However, in the case of the prior art as described above, it is mainly used for bonding to a mobile phone, a tablet, a camera module, an optical sheet, a case made of a two-dimensional plane, and the problem of not being able to uniformly irradiate ultraviolet rays on the outer surface of a three-dimensional laminate. there was.

The object of the present invention for solving the above problems is to irradiate the outer surface of the three-dimensional laminate evenly with ultraviolet rays to improve the curing performance of the three-dimensional laminate can improve the strength and shrinkage of the three-dimensional laminate It is to provide a light curing device.

In addition, another object of the present invention is to improve the curing performance of a three-dimensional laminate that can reduce the time to cure the three-dimensional laminate and increase the curing performance by irradiating ultraviolet rays made of different wavelengths using a plurality of LEDs It is to provide a light curing device.

Another object of the present invention is to provide an ultraviolet light curing device for improving the curing performance of a three-dimensional laminate that can be dried by evaporating the alcohol on the outer surface of the three-dimensional laminate while cooling the LED to irradiate ultraviolet light at a constant wavelength. Is to do.

The ultraviolet light curing device for improving the curing performance of the three-dimensional laminate of the present invention for solving the above problems is a housing formed to be opened and closed through a door on the front side, and is formed on an inner lower portion of the housing. It characterized in that it comprises a mounting unit that is formed to be mounted on the three-dimensional laminate, and a curing unit that is formed on the inner surface of the housing and irradiates and cures ultraviolet rays on the outer surface of the three-dimensional laminate.

In addition, it is formed on the front surface of the housing of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate of the present invention, check the opening and closing state of the door, and supply power to the curing unit depending on whether the door is opened or closed. It characterized in that it further comprises a detection sensor for blocking.

In addition, the curing unit of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate of the present invention further includes a plurality of LED modules for irradiating ultraviolet light, the LED module is a UV wavelength of 380 ~ 390nm LED Wow, it is characterized in that the LED is formed by alternating 400 ~ 410nm.

In addition, the curing unit of the ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate of the present invention, a plurality of LED modules formed to irradiate ultraviolet light toward the outer surface of the three-dimensional laminate, and the three-dimensional stacking It is formed on the upper, lower, left, right, and rear sides of the sieve, and is made of a reflector that reflects ultraviolet light emitted from the LED module and re-enters the three-dimensional laminate.

In addition, the cradle of the ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate of the present invention, when the three-dimensional laminate is mounted, rotates and tilts the three-dimensional laminate to inject the amount of ultraviolet radiation emitted from the curing unit It is characterized by increasing.

In addition, an ultraviolet light curing device for improving the curing performance of the three-dimensional laminate of the present invention is formed on the rear surface of the housing, a cooling fan that sucks outside air to cool the curing unit, and is formed on the lower surface of the housing. Further comprising an outlet for cooling the air cooling the curing unit in a heated state, the air introduced through the cooling fan is heated while cooling the LED module of the curing unit, the heated air is the three-dimensional laminate It is characterized in that it is moved to the outlet while in contact with the drying the three-dimensional laminate.

In addition, an internal confirmation window is formed on the door of the ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate of the present invention so as to check the curing state of the three-dimensional laminate, and the internal confirmation window is external to ultraviolet rays. It is characterized in that the UV blocking filter is formed so as not to be exposed to.

As described above, according to the ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate according to the present invention, the intensity and shrinkage of the three-dimensional laminate can be improved by uniformly irradiating ultraviolet rays on the outer surface of the three-dimensional laminate. It has an effect.

In addition, according to the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention by using a plurality of LEDs by irradiating ultraviolet rays of different wavelengths to reduce the time to cure the three-dimensional laminate and curing performance It has the effect of increasing.

In addition, according to the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention, the LED is cooled to irradiate ultraviolet light at a constant wavelength while evaporating the alcohol on the outer surface of the three-dimensional laminate to dry. have.

1 is a perspective view showing a curing device using a UV-LED module of the prior art.

Figure 2 is a perspective view showing the front of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention.

Figure 3 is an exploded view showing by separating the curing unit of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention.

Figure 4 is a perspective view showing the back and rear of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention.

5 is a plan view showing a path through which air is introduced into the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention.

Figure 6 is a side view showing a path through which air is introduced into the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention.

100: housing

110: door

111: internal confirmation window

120: detection sensor

130: cooling fan

140: outlet

200: curing unit

210: reflector

211: entrance hall

212: spray hole

220: 1st LED module

221: floodlight

222: support

230: 2nd LED module

231: diffuser plate

300: cradle

310: rotating motor

Specific features and advantages of the present invention will be described in detail below with reference to the accompanying drawings. Prior to this, when it is determined that the detailed description of the functions and configurations related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

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

As shown in Figure 2, the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention, the interior is empty and the housing 100 is formed to be opened and closed through the door 110 on the front , It is formed on the inner lower portion of the housing 100 and the mounting base 300 is formed to be mounted, and is formed on the inner surface of the housing 100 and irradiated with ultraviolet rays on the outer surface of the three-dimensional laminate to cure Characterized in that it comprises a curing unit (200).

In addition, the cradle 300 is characterized in that when the three-dimensional laminate is mounted, the amount of ultraviolet rays emitted from the curing unit 200 is increased by rotating and tilting the three-dimensional laminate.

The housing 100 is empty to accommodate the curing unit 200 and the cradle 300, and the front surface is opened, and then the housing 100 houses the three-dimensional stacked body output to the 3D printer inside the housing 100. The door 110 is formed so as to be introduced therein.

Door 110 is formed so as to be rotated on one side of the housing 100 to open and close the front of the housing 100, the upper portion of the housing 100, the power button, operation button, time setting button and Together, a display showing the operation and time is formed.

Curing unit 200 is formed on the inner surface of the housing 100, the three-dimensional laminate by irradiating ultraviolet rays in the upper, lower, left, right, rear direction of the three-dimensional laminate mounted on the cradle 300 It hardens.

The cradle 300 is formed on the inner lower surface of the housing 100 and can be rotated by the rotating motor 310 of FIG. 6, so that the 3D laminate is mounted by the cradle 300 when the 3D laminate is mounted on the top. As it rotates, ultraviolet rays can be irradiated to all surfaces of the three-dimensional laminate by the curing unit 200.

In addition, the cradle 300 can be tilted simultaneously with rotation, so that the three-dimensional stack can be tilted at a set angle, and the cradle 300 is rotated in a tilted state, and the three-dimensional stack of a complex shape is irradiated with ultraviolet rays without blind spots. It becomes possible.

At this time, in the tilted state, it is preferable that a plurality of protrusions or mounts are formed on the upper surface of the mount 300 so that the 3D stack does not slip on the upper surface of the mount 300, and the mount 300 is transparently formed. It is preferable to allow ultraviolet rays irradiated from the lower surface of the housing 100 to pass through the cradle 300 and enter the 3D laminate.

This makes it possible to irradiate ultraviolet rays on all surfaces without blind spots when curing a three-dimensional laminate with a complex shape.

In addition, it is formed on the front of the housing 100 and further includes a detection sensor 120 that checks the opening / closing state of the door 110 to supply or block power to the curing unit 200 depending on whether the door 110 is opened or closed. It is characterized by.

The detection sensor 120 is for checking the opening / closing state of the door 110, and consists of a magnetic sensor. When the door 110 is closed to close to the front of the housing 100, a magnet formed on the inner surface of the door 110 is detected. As it is in close contact with the sensor 120, the detection sensor 120 serves as a switching function that supplies power to the housing 100.

That is, only when the door 110 is closed, power is supplied inside the housing 100 by the detection sensor 120 to operate the curing unit 200 and the cradle 300, and when the door 110 is opened, detection is performed. The internal power of the housing 100 is cut off by the sensor 120 so that the operation of the curing unit 200 and the cradle 300 is stopped.

Therefore, when the door 110 is opened, ultraviolet rays irradiated by the curing unit 200 may be prevented from being irradiated to the outside, and when the door 110 is opened during curing, power is cut off and ultraviolet rays are irradiated to the user's skin or eyes. This can be prevented from being irradiated.

In addition, the door 110 is provided with an internal confirmation window 111 to check the curing state of the three-dimensional laminate, and the internal confirmation window 111 is formed with an ultraviolet blocking filter to prevent exposure of ultraviolet rays to the outside. It is characterized by.

The internal confirmation window 111 is for confirming the state of the three-dimensional laminate being cured by the curing unit 200 inside the housing 100, and is formed to penetrate from the front to the rear of the door 110.

In addition, in the interior confirmation window 111, a UV blocking filter is formed inside the housing 100 to block UV rays irradiated by the curing unit 200, and the UV blocking filter allows the user to use the housing without fear of exposure to UV rays. 100) It is possible to confirm the three-dimensional laminate cured from the inside.

Figure 3 is an exploded view showing the separation of the curing unit 200 of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the present invention.

As shown in Figure 3, the curing unit 200 of the ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate according to the present invention is formed to irradiate ultraviolet rays toward the outer surface of the three-dimensional laminate It is characterized by consisting of a LED module, and a reflector 210 that is formed on the upper, lower, left, right, and rear of the three-dimensional laminate to reflect the ultraviolet light emitted from the LED module to re-enter the three-dimensional laminate. .

The

LED modules

220 and 230 are formed in a plurality so as to irradiate ultraviolet rays from the upper, lower, left, right, and rear sides of the three-dimensional stacked body, and each of the

LED modules

220 and 230 is attached to the reflector 210. It is attached and fixed.

At this time, the front surface of the reflector 210 is opened so that a 3D stack can be drawn into the front surface, and

LED modules

220 and 230 are formed on the surface except the front surface to irradiate ultraviolet light toward the 3D stack. Is formed to help.

In addition, the reflector 210 is formed to be spaced from the inner surface of the housing 100 of FIG. 2, the

LED modules

220 and 230 are positioned in a space between the housing 100 and the reflector 210, and the reflector 210 The incident holes 211 are formed on each side, so that the

LED modules

220 and 230 can irradiate ultraviolet rays into the reflector 210.

The reflector 210 is formed of a stainless steel material, and when the

LED modules

220 and 230 irradiate ultraviolet rays inside the reflector 210, the ultraviolet rays that are not absorbed by the 3D laminate are reflected and re-entered toward the 3D laminate. To shorten the curing time.

That is, since the reflector 210 is formed in a polygonal shape, it is preferable to reflect it at multiple angles when ultraviolet rays are reflected, so that it can be re-entered into the 3D stack, and the

LED modules

220 and 230 are each surface of the reflector 210 Since it is formed on, it should be able to irradiate ultraviolet rays in various ways.

The

LED modules

220 and 230 include a first LED module 220 formed on both sides and a rear surface of the reflector 210, and a second LED module 230 formed on the upper and lower portions of the reflector 210, respectively.

The first LED module 220 is located on the left, right, and back sides of the reflector 210 to irradiate ultraviolet rays on the side surfaces of the three-dimensional stacked body, and the second LED module 230 is provided on the upper and lower parts of the reflector 210. Each is positioned to irradiate ultraviolet rays on the upper and lower surfaces of the three-dimensional laminate.

At this time, the first LED module 220, the LED is formed in the vertical direction, when mounted on the reflector 210, it is possible to irradiate ultraviolet light in the vertical direction of the three-dimensional laminate, the front of the first LED module 220, the reflector ( 210) is formed on the front surface of the support member 222 and the support member 222 to be combined with a light-transmitting plate 221 that diffuses irradiated ultraviolet rays.

The light-transmitting plate 221 is made to diffuse the light irradiated from the LED so that ultraviolet rays can be incident on the three-dimensional laminate, and the diffusion lenses are disposed in correspondence to the positions where the LEDs are formed.

The support 222 has a first LED module 220 is inserted into the back, and a groove is formed in the front and the rear so that the light-transmitting plate 221 can be inserted in the front, and the center is penetrated to allow the LED to pass through. have.

In addition, the support 222 is coupled to the outer surface of the reflector 210, it is possible to fix the position of the first LED module 220 and the light emitting plate 221.

The second LED module 230 is formed at the top and bottom of the reflector 210, and the LED is formed in a circular or semicircular shape, and irradiates ultraviolet rays through the incident hole 211 of the reflector 210 to mount the holder of FIG. The upper and lower surfaces of the three-dimensional laminate rotated by 300) are cured.

At this time, in order to secure the second LED module 230 to the upper and lower portions of the reflector 210, a diffusion plate 231 is formed between the second LED module 230 and the reflector 210, and the diffusion plate 231 has LEDs. A lens for diffusing the ultraviolet light irradiated from is formed.

In addition, since the support 222 and the diffusion plate 231 are formed of aluminum or copper that is easily absorbed by heat, it can also serve as a heat sink that absorbs heat generated from the first LED module 220 and discharges it to the outside. In this case, it is preferable that a plurality of grooves and protrusions are formed on the outer surfaces of the support 222 and the diffusion plate 231.

In addition, the support 222 and the diffuser plate 231 transfer heat generated from the first LED module 220 and the second LED module 230 to the reflector 210, so that the first LED module is formed by the reflector 210 having a large area. The 220 and the second LED module 230 can be quickly cooled.

In addition, the curing unit 200 further includes a plurality of LED modules (220, 230) for irradiating ultraviolet rays, and the LED modules (220, 230) have UV wavelengths of 380-390 nm and LEDs of 400-410 nm. It is characterized by being formed alternately.

The LEDs formed on the first LED module 220 and the second LED module 230 have alternating LEDs irradiating different wavelengths to form a UV lamp and a curing effect similarly, so that the heterogeneous UV wavelengths are irradiated on the 3D stack. It is done.

The first wavelength irradiated from the

LED modules

220 and 230 consists of 380 to 390 nm, the second wavelength consists of 400 to 410 nm, and the ideal wavelength alternates the LED of 385 nm for the first wavelength and 405 nm for the second wavelength. It is preferable to form the LED module (220, 230).

The first wavelength and the second wavelength consist of a wavelength band with a high absorbance of the photoinitiator mixed with the resin when the 3D laminate is output from the 3D printer, thereby increasing the curing speed of the photoinitiator by two wavelengths and improving the strength when cured. There will be.

Figure 4 is a perspective view showing the back and rear of the ultraviolet light curing device for improving the curing performance of the three-dimensional laminate according to the invention, Figure 5 is an ultraviolet for improving the curing performance of the three-dimensional laminate according to the invention It is a plan view showing the path through which air flows into the inside of the light curing device. 6 is a side view showing a path through which air is introduced into an ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate according to the present invention.

4 to 6, an ultraviolet light curing device for improving the curing performance of the dimensional laminate according to the present invention is formed on the rear surface of the housing 100 and sucks outside air to cool the curing unit 200 The cooling fan 130 and the outlet 100 to be formed on the lower surface of the housing 100 to cool the curing unit 200 to be discharged in a heated state, and further includes a cooling fan 130 The air introduced through is heated while cooling the

LED modules

220 and 230 of the curing unit 200, and the heated air is moved to the outlet 140 while being in contact with the 3D stack to dry the 3D stack. It is characterized by.

The cooling fan 130 is formed on the rear surface of the housing 100 and sucks external air into the housing 100 to cool the heat generated from the LED of the curing unit 200, thereby reducing the output of the LED by high temperature. It is formed to prevent things.

At this time, some of the air sucked by the cooling fan 130 moves along the outer surface of the reflector 210 formed to be spaced apart from the inner surface of the housing 100, as shown in FIG. 5, and partly reflector 210 as shown in FIG. It will be moved to the top of the.

At this time, the air is moved in direct contact with the first LED module 220 and the second LED module 230, absorbs heat from the first LED module 220 and the second LED module 230 by convection heat transfer, and heats the first LED module ( 220) and the second LED module 230 are cooled.

In addition, the reflector 210 in contact with the first LED module 220 and the second LED module 230 also functions as a heat sink so as to absorb heat generated by the first LED module 220 and the second LED module 230. When the air is moved, the area in contact with the reflector 210 is widened, so the speed at which heat can be absorbed increases, so that the first LED module 220 and the second LED module 230 can be cooled more efficiently.

In addition, a plurality of injection holes 212 are formed in the reflector 210, and air introduced between the housing 100 and the reflector 210 by the cooling fan 130 is supplied to the housing 100 through the injection holes 212. After being injected in the direction of the cradle 300 formed in the lower center of the is discharged through the lower portion of the reflector 210 to the outlet 140.

At this time, since the 3D stacked body mounted on the cradle 300 moves while the heated air is directly contacted while cooling the first LED module 220 and the second LED module 230, the air is wet on the outer surface of the 3D stacked body. B. Alcohol can be evaporated to dry.

That is, the air sucked by the cooling fan 130 is moved between the housing 100 and the reflector 210 to be heated while primarily cooling the first LED module 220 and the second LED module 230 and heated. Air is sprayed toward the center of the mounting plate to dry the three-dimensional laminate.

Thereafter, the air is discharged to the outside through the outlet 140 formed at the bottom of the housing 100 through the injection hole 212 formed at the bottom of the cradle 300.

As described above, according to the ultraviolet light curing apparatus for improving the curing performance of the three-dimensional laminate according to the present invention, the intensity and shrinkage of the three-dimensional laminate can be improved by uniformly irradiating ultraviolet rays on the outer surface of the three-dimensional laminate. In addition, by using a plurality of LEDs to irradiate ultraviolet rays made of different wavelengths, it is possible to reduce the time to cure the three-dimensional laminate and to increase the curing performance, while cooling the LED to irradiate with ultraviolet rays at a constant wavelength. There is an effect that can dry by evaporating the alcohol on the outer surface.

As described above, the present invention has been described with reference to preferred embodiments, but those skilled in the art to which the present invention pertains vary the present invention without departing from the technical spirit and scope described in the claims of the present invention. It can be modified or modified. Therefore, the scope of the invention should be construed by the claims set forth to cover many examples of such modifications.

Claims

A housing formed to be opened and opened and opened through a door on the inside;

A holder formed on an inner lower portion of the housing and formed to allow a three-dimensional stack to be mounted;

It is formed on the inner surface of the housing, characterized in that it comprises; a curing unit for curing by irradiating ultraviolet rays on the outer surface of the three-dimensional laminate

UV light curing device for improving the curing performance of the three-dimensional laminate.
According to claim 1,

It is formed on the front surface of the housing, by checking the opening and closing state of the door, the sensor for supplying or blocking the power to the curing unit according to the opening and closing of the door; characterized in that it further comprises a

UV light curing device for improving the curing performance of the three-dimensional laminate.
According to claim 1,

The curing unit further includes a plurality of LED modules for irradiating ultraviolet light,

The LED module is characterized in that the UV wavelength of 380 ~ 390nm LED, 400 ~ 410nm LED is formed alternately

UV light curing device for improving the curing performance of the three-dimensional laminate.
According to claim 1,

The curing unit

A plurality of LED modules formed to irradiate ultraviolet rays toward an outer surface of the three-dimensional laminate;

It is formed on the upper, lower, left, right, and rear surfaces of the three-dimensional stacked body and reflects the ultraviolet light emitted from the LED module to re-enter the three-dimensional stacked material.

UV light curing device for improving the curing performance of the three-dimensional laminate.
According to claim 1,

The cradle is characterized in that when the 3D laminate is mounted, the amount of ultraviolet rays emitted from the curing unit is increased by rotating and tilting the 3D laminate.

UV light curing device for improving the curing performance of the three-dimensional laminate.
According to claim 1,

A cooling fan formed on the rear surface of the housing to cool the curing unit by sucking outside air;

It is formed on the lower surface of the housing and further includes an outlet through which air cooled in the curing unit is discharged in a heated state.

The air introduced through the cooling fan is heated while cooling the LED module of the curing unit, and the heated air is moved to the outlet while contacting the 3D stack to dry the 3D stack.

UV light curing device for improving the curing performance of the three-dimensional laminate.
According to claim 1,

An internal confirmation window is formed on the door so as to check the curing state of the three-dimensional laminate;

The internal confirmation window is characterized in that the UV blocking filter; is formed so that the ultraviolet light is not exposed to the outside

UV light curing device for improving the curing performance of the three-dimensional laminate.