WO2013015518A1

WO2013015518A1 - Visible light scan-type, low-cost, high-speed molding apparatus using an lcd mask

Info

Publication number: WO2013015518A1
Application number: PCT/KR2012/004193
Authority: WO
Inventors: 박인백
Original assignee: 주식회사 씨에이텍
Priority date: 2011-07-28
Filing date: 2012-05-25
Publication date: 2013-01-31
Also published as: KR20130013490A; KR101238340B1

Abstract

The present invention relates to a visible light-applied high-speed molding apparatus using an LCD mask. The visible light-applied high-speed molding apparatus using an LCD mask according to the present invention is characterized by comprising: a light source assembly having a light source for emitting visible light, and guiding the visible light from the light source to a fixed position; a transfer mechanism having the light source assembly fixed thereto, for moving the light source assembly; and a dynamic shape generator having a set pattern formed thereon for high-speed molding, and having visible light rays incident from the light source assembly selectively passing therethrough according to the set pattern, wherein the light source assembly is moved by the transfer mechanism, the visible light rays from the light source assembly that pass through a limited region from among the entire region of the dynamic shape generator continuously move in the direction in which the light source assembly moves, and the visible light rays from the moving light source assembly scan the entire region of the dynamic shape generator and enter a photosensitive liquid polymer according to the pattern formed on the dynamic shape generator so as to perform high-speed molding. With the visible light-applied high-speed molding apparatus using an LCD mask according to the present invention, high-speed molding of a photosensitive liquid polymer is performed by scanning according to a horizontal movement of light passing a local region, thereby promoting improved processability due to a high light transmissivity and uniform light distribution, and improved productivity through a shortened curing time. Therefore, the apparatus not only can effectively be applied to large-area high-speed molding, but can have improved durability by preventing damage or destruction caused by heat deterioration of an LCD, and can effectively be applied in low-cost high-speed molding by enabling improved processability and reducing equipment setup costs using, as a light source, visible light exhibiting high transmissivity for an LCD.

Description

Low Cost Rapid Prototyping Device with Visible Light Scan using LCD Mask

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visible light scanning type low cost rapid prototyping apparatus using an LCD mask, and more particularly, to a photosensitive liquid polymer by scanning according to horizontal movement of light passing through a local region. Rapid molding makes it possible to improve the workability due to high light transmittance and uniform light distribution and to improve productivity by shortening the curing time, so that it can be effectively applied to large area rapid molding and damage caused by degradation of LCD. It prevents damage or damage and increases durability, while visible light showing high transmittance to LCD is used as a light source, which can improve processability and reduce equipment construction cost. Of visible light scanning type low cost rapid prototyping device using liquid crystal mask The.

SLA (StereoLithography Aperture), which is one of rapid prototyping, generates a cross-sectional image of fine thickness through the conversion of 3D CAD data, and then irradiates the liquid photocurable resin with light passing selectively through the cross-sectional image. By repeating the process of hardening to a fine thickness by stacking successively one by one to produce a structure implemented in three-dimensional CAD data. Such rapid prototyping techniques can be applied to the micro / nano industries to be used to manufacture micro-precision parts, information / communication devices, medical devices, and the like.

The micro rapid forming technique has a disadvantage in that the processing material is limited to the photocurable resin, but it is easy to manufacture a complicated three-dimensional microstructure or a polymer mold for forming the microstructure. Is increasing.

Here, a scan type rapid forming technique for rapid forming by scanning by moving light and a rapid type forming technique for forming rapid forming by projection of light have been developed and are currently in use.

Scan type rapid molding technology, the Republic of Korea Patent Publication No. 100892353 "rapid molding method, rapid molding system and rapid molding program", Patent Publication No. 10-2011-0081591 "Rapid Rapid using UV-LED Molding apparatus ”, and the like, in the conventional scanning type rapid forming technique, a light source assembly for scanning light includes a laser light source, an expensive galvano mirror for a light path, a three-axis stage for moving, and the like. There was a problem that the installation cost of the facility is high because there are many, the beam spot (beam) of the light beam (beam) is not fine, so it was difficult to produce a fine structure at the same time.

And, as a rapid-type rapid molding technology, Republic of Korea Patent Publication No. 10-1006414 "High-speed laminated rapid molding apparatus", Patent Registration No. 10-0930788 "Large, small rapid molding apparatus", Patent Publication Publication No. 10-2010-0080298 discloses a high-speed laminated rapid prototyping device. In the conventional transfer type rapid prototyping technology, the rapid prototyping is performed by selectively passing light through a mask on which a pattern image set for rapid prototyping is formed. As a result, the shape corresponding to the microscopic cross-sectional image can be obtained as a single light irradiation, and thus the processing time can be shortened. However, as shown in FIG. 1, the light irradiated with the photocurable resin is dispersedly distributed. Thus, the curing energy of the light transmitted to the local region of the photocurable resin (indicated by the arrow in FIG. 1, the size of the arrow corresponds to the curing energy of the light) Eungham) is in accordance with has a low value as a whole, poor moldability, there is a problem in that machining accuracy is lowered. In particular, the edge portion of the photo-curable resin has a problem that the curing energy of the light is significantly reduced and processing is not properly made.

That is, as shown in FIG. 2, one embodiment of the conventional rapid prototyping apparatus reflecting light of a light source to a reflecting plate to guide an LCD mask in order to use a large area of an LCD mask has a non-uniform energy distribution of pattern light projected on the LCD mask. , The light energy at the edge part is lower than the central part. In addition, another embodiment of the conventional rapid prototyping apparatus that directly enters the light of the light source into the LCD mask in order to form the pattern light with a high light energy as shown in FIG. 3 has the advantage that the light energy is increased, as in FIG. The energy distribution of the pattern light projected on the LCD mask was non-uniform, and the phenomenon that the light energy at the edge portion was lower than that of the central portion occurred, and the degradation of the LCD mask, which was weak to heat, was promoted. In addition, in the conventional rapid molding apparatus as shown in FIGS. 2 and 3, a partial overcuring phenomenon or a partial uncuring phenomenon of the photocurable resin occurred due to uneven light distribution. The work-space, which is an advantage, has decreased.

In addition, in the conventional rapid prototyping apparatus, since UV and the like are used as light sources, the cost of the light source assembly 10 'is increased and energy consumption for driving the light source assembly 10' is also increased. there was.

The present invention has been made to solve the above problems, and as the light passing through the local region moves horizontally as the light source assembly is moved by the transfer mechanism, the rapid molding for the photocurable resin is achieved by scanning. In addition, the improved light transmittance and uniformity of the light distribution can be induced to enable accurate and precise shape processing and rapid curing of the photocurable resin, and can also increase durability by preventing damage or damage caused by degradation of the LCD. An object of the present invention is to provide a visible light scanning type low cost rapid forming apparatus using a new type of mask.

In particular, according to the present invention, as rapid forming is performed by scanning by horizontal movement of light, visible light scanning using a new-type LCD mask that can be effectively applied to large-area rapid forming to improve processability and productivity when manufacturing large-area sculptures. It is an object of the present invention to provide a low cost rapid molding apparatus.

In addition, the present invention is to use the LCD mask as a dynamic shape generator, and the visible light showing a high transmittance for the LCD as a light source, so as to improve the workability and to reduce the cost for the light source assembly configuration Accordingly, an object of the present invention is to provide a visible light scan type low cost rapid molding apparatus using a novel mask of a new type capable of achieving low cost rapid molding.

A visible light scanning type low cost rapid prototyping apparatus using an LCD mask of the present invention for achieving the above object comprises a light source assembly having a light source for emitting visible light, and directing the visible light of the light source to a predetermined position; A transport mechanism to which the light source assembly is fixed and to move the light source assembly; A pattern set for rapid prototyping is formed, and a dynamic shape generator for selectively passing visible light incident from the light source assembly along the set pattern, wherein the light source assembly is moved by the transfer mechanism, and the dynamic The visible light of the light source assembly passing through the local region of the shape generator is continuously moved in the moving direction of the light source assembly, and the visible light of the moving light source assembly scans the entire area of the dynamic shape generator. According to the pattern formed in the dynamic shape generator is added to the photocurable resin, it characterized in that the rapid molding.

In the visible light scanning type low cost rapid forming apparatus using the LCD mask according to the present invention, the light source assembly includes: a visible light lamp used as a light source; A focusing reflector installed outside one side of the visible light lamp and configured to surround a portion of the visible light lamp to reflect visible light of the visible light lamp to be guided to the other side of the visible light lamp; It is installed on the other outside of the visible light lamp, characterized in that it comprises a light guide reflector for inclined at a set angle so that the visible light is guided to the dynamic shape generator. Here, the visible light lamp is characterized in that the LED array is used.

In the visible light scanning type low cost rapid forming apparatus using an LCD mask according to the present invention, the light guide reflector has a set angle to allow visible light to be incident in the Z axis direction to the dynamic shape generator disposed in the Y axis direction. It is characterized in that the energy of the visible light which is passed through the dynamic shape generator to the photocurable resin is maximized.

In the visible light scanning type low cost rapid prototyping apparatus using the LCD mask according to the present invention, the light source assembly further includes a condenser lens disposed on an optical path of visible light guided from the light guide reflector to the dynamic shape generator. And the light beam is focused to be incident on the dynamic shape generator.

In the visible light scanning type low-cost rapid prototyping apparatus using the LCD mask according to the present invention, the condensing lens has a bar shape having a length corresponding to the width W of the dynamic shape generator, and the dynamic shape. It is characterized in that the rod-shaped lens is disposed long in the X-axis direction of the width (W) direction of the generator.

In the visible light scanning type low cost rapid forming apparatus using the LCD mask according to the present invention, the rod-shaped lens is made of a glass material having a circular cross-sectional shape to improve the light collection efficiency.

In the visible light scanning type low cost rapid prototyping apparatus using the LCD mask according to the present invention, the light source assembly has a visible light lamp, which is used as a light source, disposed vertically, and a reflecting mirror and a condenser lens on top of the visible light lamp. The lenses are sequentially arranged vertically so that visible light emitted at a wide irradiation angle is focused and guided to the dynamic shape generator. On the contrary, in the light source assembly, the visible light lamp used as the light source is horizontally disposed, and a cylinder lens is disposed to be spaced apart in front of the visible light lamp, and the visible light emitted at a wide irradiation angle is focused and emitted, and the cylinder The light guide reflector may be inclined at a predetermined distance from the front of the lens so that the visible light transmitted from the cylinder lens may be guided to the dynamic shape generator disposed above the lens. A cylinder lens, which is a condenser lens installed on the optical path of the visible light guided by the dynamic shape generator, may be further provided to increase the condensing efficiency of the visible light.

In the visible light scanning type low cost rapid prototyping apparatus using the LCD mask according to the present invention, the light source assembly may include a heat dissipation mechanism for dissipating the light source, and a heat sink or a fan cooler may be used as the heat dissipation mechanism. .

In the visible light scanning type low cost rapid prototyping apparatus using the LCD mask according to the present invention, the light source assembly is disposed in the X-axis direction in the width (W) direction of the dynamic shape generator and is fixed to the transfer mechanism, and the transfer mechanism Is characterized in that for moving the light source assembly in the Y-axis direction, the length (L) direction of the dynamic shape generator.

In the visible light scanning type low cost rapid forming apparatus using the LCD mask according to the present invention, the conveying mechanism has a pair of fan belts installed in the Y axis direction in the length (L) direction of the dynamic shape generator. It is characterized in that it is arranged to be spaced apart from each other on both sides of the X-axis direction in the (W) direction.

In the visible light scanning type low cost rapid forming apparatus using an LCD mask according to the present invention, the fan belt is driven by a stepping motor to control the moving speed, the moving direction, and the moving time of the fan belt. do.

The visible light scanning type low cost rapid molding apparatus using the LCD mask according to the present invention is characterized in that the tension of the fan belt can be adjusted by allowing the fan belt to be installed by passing through a belt tension controller installed at a predetermined position. It is done.

In the visible light scanning type low cost rapid forming apparatus using the LCD mask according to the present invention, the dynamic shape generator is characterized in that the LCD (LCD) mask. Here, the LCD mask is characterized in that the TFT-LCD.

Such a visible light scanning type low cost rapid prototyping apparatus using an LCD mask according to the present invention is characterized in that the lamination Z-axis stage is provided so that the lamination of the photocurable resin can proceed.

Such a visible light scanning type low cost rapid molding apparatus using an LCD mask according to the present invention includes a stepping motor installed vertically; A screw guide vertically coupled to the stepping motor to rotate; A screw fixed to a bottom surface of the stacking Z-axis stage and inserted into the screw guide is provided, and the screw is vertically moved by the rotation of the screw guide according to the operation of the stepping motor. It is characterized in that the vertical movement is induced.

According to the visible light scanning type low cost rapid prototyping apparatus using the LCD mask according to the present invention, as the rapid prototyping is performed while scanning the light passing through the local region by the movement of the light source assembly by the transfer mechanism, There is an effect that improvement of workability by uniform light distribution and improvement of productivity by shortening curing time can be achieved. As a result, it can be effectively applied to large-area rapid molding to improve processability and productivity when manufacturing large-area moldings. In addition, deterioration of the LCD may be prevented due to the uneven light distribution of the light energy, thereby preventing damage or damage to the LCD, thereby increasing the durability of the device.

In addition, the present invention uses a light source assembly having a visible light lamp that is not an expensive light source assembly, such as a galvano mirror for making a UV light source or a light path, thereby reducing the cost of equipment installation for the light source assembly, thereby reducing the cost Can be applied effectively. Here, as the visible light shows high transmittance with respect to LCD, the processability and formability of the rapid prototyping apparatus of the present invention can be improved.

1 is a view for showing a structure in which rapid molding is performed in a rapid molding apparatus using a conventional LCD mask;

2 is a view for showing the energy distribution of light when the light of the light source is guided to the LCD mask by the reflector in a rapid molding apparatus using a conventional LCD mask;

3 is a view for showing the energy distribution of light when the light of the light source is directly incident to the LCD mask in a rapid molding apparatus using a conventional LCD mask;

Figure 4 is a block diagram for showing the technical idea of a visible light scan type low cost rapid prototyping apparatus using an LCD mask according to the present invention;

5 is a plan view showing the configuration of a visible light scanning type low cost rapid prototyping apparatus using an LCD mask according to an embodiment of the present invention;

6 is a side view for showing the configuration of a visible light scan type low cost rapid prototyping apparatus using an LCD mask according to an embodiment of the present invention;

7 is a view showing the configuration of a visible light scan type low cost rapid prototyping apparatus using an LCD mask according to another embodiment of the present invention;

FIG. 8 is a graph for showing relative spectral distribution of wavelengths of an LED array of a light source assembly forming a visible light scanning type low cost rapid prototyping apparatus using an LCD mask according to another embodiment of the present invention; FIG.

9 is a view showing the configuration of a visible light scan type low cost rapid prototyping apparatus using an LCD mask according to another embodiment of the present invention;

FIG. 10 is a view illustrating a configuration in which the Z-axis stage of the heat dissipation mechanism constituting the visible ray scanning type low cost rapid prototyping apparatus using an LCD mask according to an embodiment of the present invention is moved up and down.

4 is a block diagram illustrating the technical concept of a visible light scanning type low-cost rapid prototyping apparatus using an LCD mask according to the present invention.

Referring to FIG. 4, the visible light scanning type low cost rapid prototyping apparatus 100 using the LCD mask according to the present invention is configured to perform rapid prototyping by scanning moving light. For this purpose, the light source assembly 10 and the transfer mechanism ( 20), a dynamic shape generator 30 is provided.

The light source assembly 10 includes a light source, and a component for guiding light to a predetermined position is provided together with the light source. Here, the light source assembly 10 according to the present invention has a light source that emits visible light. Visible light has a high transmittance with respect to LCD (LCD), the rapid forming apparatus 100 according to the present invention is the moldability and processability by the visible light source as the LCD mask 31 is used as the dynamic shape generator 30 It will be possible to improve. In addition, since the visible light source can be provided at a low cost, the present invention reduces the manufacturing cost of the light source assembly 10, compared to the conventional light source assembly having a light source for emitting a laser or UV light, etc., the light source assembly Energy consumption for driving 10 is also reduced.

The light source assembly 10 is preferably positioned below the horizontal shape generator 30 to allow visible light to be incident perpendicularly to the dynamic shape generator 30. This is to maximize the curing energy of visible light emitted from the light source assembly 10 and passed through the dynamic shape generator 30 to the photocurable resin 1. To this end, the light source assembly 10 may emit visible light with a scanning beam focused at a narrowly defined width. The light source assembly 10 emitting the scanning beam may generate the dynamic shape generator 30. There is an advantage of having a work-space as large as the size of the LCD mask 31.

Here, the visible light emitted from the light source of the light source assembly 10 may be guided to the dynamic shape generator 30 by a reflector such as a reflector, a reflecting mirror, which is a heat of the light source that emits visible light The transfer to the LCD mask 31 constituting the dynamic shape generator 30 is minimized to prevent degradation of the LCD mask 31. In addition, the light source assembly 10 may further include a heat dissipation mechanism such as a heat sink or a fan cooler to achieve smooth heat dissipation.

The transfer mechanism 20 is fixed to move the light source assembly 10, such a transfer mechanism 20 is disposed in accordance with the direction in which the dynamic shape generator 30 is disposed is discharged from the light source assembly 10 to the dynamic shape Scanning of the light passing through the generator 30 can be achieved. That is, when the dynamic shape generator 30 is arranged horizontally, the transfer mechanism 20 is also arranged horizontally so that the light source assembly 10 can move in the horizontal direction so that scanning by horizontal movement of light can be performed. .

Here, the horizontal length (L) direction in which the dynamic shape generator 30 is disposed is the Y-axis direction, and the horizontal width (W) direction in which the dynamic shape generator 30 is disposed is the X-axis direction, the dynamic shape generator 30. When defining a direction perpendicular to the horizontal plane is arranged in the Z-axis direction, the transfer mechanism 20 is to move the light source assembly 10 in the Y-axis direction as a Y-axis transfer mechanism. To this end, as the transfer mechanism 20, a fan belt 21 driven in the Y-axis direction may be used. In addition, the fan belt 21 is driven by a drive motor. As the drive motor, a stepping motor is used to control the moving speed, the moving direction, the moving time, and the like of the fan belt 21, but also the transfer mechanism 20. It is also possible to reduce the production cost of

The dynamic shape generator 30 has a pattern 32 set for rapid prototyping, and the dynamic shape generator 30 passes visible light incident from the light source assembly 10. Visible light of the light is selectively passed through the dynamic shape generator 30 along the set pattern formed in the dynamic shape generator 30 to cure the photocurable resin 1 in the set pattern.

Here, the dynamic shape generator 30 according to the present invention uses the LCD mask 31 so that the shape of the pattern can be made smoothly and easily.

The visible light scanning type low cost rapid prototyping apparatus 100 using the LCD mask according to the present invention configured as described above performs the rapid prototyping for the photocurable resin 1 through the following process.

First, the light source assembly 10 is operated to allow visible light emitted from the light source assembly 10 to pass through a local region of the dynamic shape generator 30. At the same time, the transfer mechanism 20 is operated to move the light source assembly 10 at a predetermined speed, whereby visible light passing through the local region of the dynamic shape generator 30 is transferred to the light source assembly 10. It moves continuously in the direction of movement of.

Here, the minimum feed rate and the maximum feed rate may be set so that the transfer of the light source assembly 10 by the transfer mechanism 20 may be stably and efficiently, and the dynamic shape generator having no pattern is formed so that rapid processing is performed. In the area 30, the light source assembly 10 may be transferred at a speed greater than or equal to the maximum transfer speed, and the light source assembly 10 may be transferred at a speed between the minimum and maximum transfer speeds from the point where the pattern is formed. .

The visible light of the moving light source assembly 10 is selectively input to the photocurable resin 1 by scanning the entire area of the dynamic shape generator 30 while matching the pattern formed in the dynamic shape generator 30. The rapid molding is performed while the cured resin 1 'having the same shape is generated in the pattern formed in the dynamic shape generator 30.

As described above, since the visible light scanning type low cost rapid prototyping apparatus 100 using the LCD mask according to the present invention has a structure in which visible light passes through a local region of the dynamic shape generator 30, it is transmitted to the photocurable resin 1. As the curing energy of the light indicated by the size of the arrow in FIG. 4 increases, curing of the local region of the photocurable resin 1 through which visible light is transmitted is made smooth and stable. Accordingly, accurate and precise shape processing is achieved.

In addition, the rapid molding apparatus 100 according to the present invention has a structure in which rapid molding on the photocurable resin 1 is performed by scanning by horizontal movement of light having a high curing energy as described above, Likewise, the light distribution is uniform, and the light at the edge portion has the same curing energy as the light at the center portion. Accordingly, the photocurable resin (1) as a whole is stable and smoothly cured to improve the accuracy and precision of the shape processing, the moldability of the rapid molding is improved, the LCD mask (LCD) used as the dynamic shape generator 30 ( Damage or breakage due to deterioration of 31) is prevented so that rapid molding can be stably performed, while the durability of the apparatus is increased.

As the photocurable resin 1 is cured by the light having a high curing energy as described above, as the rapid curing is performed and the molding time according to the rapid molding is shortened, the production productivity of the rapid molding is also improved.

In addition, the rapid prototyping apparatus 100 according to the present invention uses the LCD mask 31 as the dynamic shape generator 30, and the visible light showing the high transmittance for the LCD is used as the light source, thereby improving workability. In addition, the cost for the light source assembly can be reduced, resulting in low cost rapid molding.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 5 to 10. On the other hand, in the drawings and the detailed description of the construction and operation that can be easily understood by those skilled in the art from the general rapid forming apparatus, rapid forming apparatus, LCD, LCD mask, etc. are briefly or omitted. In particular, in the drawings and detailed description of the drawings, detailed descriptions and illustrations of specific technical configurations and operations of elements not directly related to technical features of the present invention are omitted, and only the technical configurations related to the present invention are briefly shown or described. It was.

5 is a plan view showing the configuration of a visible light scanning type low cost rapid prototyping apparatus using an LCD mask according to an embodiment of the present invention, Figure 6 is a visible light scanning type low cost using an LCD mask according to an embodiment of the present invention It is a side view for showing the structure of a rapid molding apparatus.

5 and 6, in the visible light scanning type low cost rapid forming apparatus 100 using the LCD mask according to the embodiment of the present invention, the LCD mask 31 disposed horizontally in the Y-axis direction is a dynamic shape generator ( 30, the light source assembly 10 and the transfer mechanism 20 are disposed at a position spaced downward from the LCD mask 31.

Here, the light source assembly 10 according to the embodiment of the present invention includes a visible light lamp 11, a focusing reflector 12, a light guide reflector 13, and a condenser lens 14 which are used as a light source.

The focusing reflector 12 is installed outside one side of the visible light lamp 11 and is formed to surround a portion of the visible light lamp 11. For this purpose, the focusing reflector 12 may have a semi-circular cross-sectional shape. Here, when the focusing reflector 12 has a semi-circular cross-sectional shape, it has a length corresponding to the width W of the LCD mask 31 so that the LCD mask is provided through the focusing reflector 12 and the light guide reflector 13. The visible light incident on the 31 may correspond to the width of the LCD mask 31. The focusing reflection plate 12 reflects the visible light emitted from the visible light lamp 11 to guide the other side of the visible light lamp 11.

The light guide reflecting plate 13 is installed outside the other side of the visible light lamp 11, and the light guide reflecting plate 13 has a flat plate shape. The light guide reflector 13 is disposed to be inclined at a set angle so that the visible light transmitted from the visible light lamp 11 and the focusing reflector 12 is guided to the dynamic shape generator 30. Here, the light guide reflector 13 according to the embodiment of the present invention has a set angle to allow visible light to be incident in the Z-axis direction to the dynamic shape generator 30 disposed in the Y-axis direction, which is a dynamic shape generator ( This is to maximize the energy of the visible light that is passed through the 30) to the photocurable resin (1).

The condenser lens 14 is disposed on an optical path of visible light guided from the light guide reflector 13 to the dynamic shape generator 30, and the condenser lens 14 is visible from the light guide reflector 13. The light beams are focused and incident on the dynamic shape generator 30. Here, the rod-shaped lens 141 is used as the condensing lens 14 according to the embodiment of the present invention. The rod-shaped lens 141 has a length corresponding to the width W of the dynamic shape generator 30. It has an excitation bar shape, and is disposed long in the X-axis direction, which is the width W direction of the dynamic shape generator 30. Here, the rod-shaped lens 141 is made of a glass material of a circular cross-sectional shape to improve the light collection efficiency.

Here, the light source assembly 10 according to the embodiment of the present invention is disposed in the X-axis direction, the width (W) direction of the dynamic shape generator 30 is fixed to the transport mechanism 20.

The transfer mechanism 20 moves the light source assembly 10 in the Y-axis direction, which is the length L direction of the dynamic shape generator 30. The transfer mechanism 20 includes a pair of fan belts. It consists of 21. Here, the light source assembly 10 is fixed between the pair of fan belts 21. The fan belt 21 is installed in the Y-axis direction in the length (L) direction of the dynamic shape generator 30, and the pair of fan belts 21 are in the width (W) direction of the dynamic shape generator 30. It is arranged to be spaced apart from each other on both sides in the X-axis direction. Here, the separation distance of the pair of fan belts 21 is equal to the width (W) of the dynamic shape generator 30, or larger than the width (W) of the dynamic shape generator 30 between the pair of fan belts 21. The light source assembly 10, which is secured to it, may correspond to the width of the dynamic shape generator 30.

The dynamic shape generator 30 according to the embodiment of the present invention allows the LCD mask 31 to be used and the formation of the pattern 32 can be made smoothly and easily. Here, a TFT-LCD may be used as the LCD mask 31, and PDMS may be mounted on the surface of the TFT-LCD by spinning coating to prevent stacking errors or breakage of the TFT-LCD.

In addition, the rapid prototyping apparatus 100 according to the embodiment of the present invention includes a Z-axis stage 40 for lamination, so that the lamination of the photocurable resin 1 may proceed.

On the other hand, the photocurable resin (1) used in the visible light scanning type low-cost rapid molding apparatus 100 using the LCD mask according to an embodiment of the present invention is to reduce the viscosity of the trifunctional monomer having a high rigidity, trifunctional monomer Meanwhile, a monofunctional monomer having a property of inducing rapid curing may be synthesized at a predetermined ratio, and may be prepared by adding Irgacure 784, a photoinitiator of visible light, and the trifunctional monomer and the first functional monomer are 1: 1. It is preferable to have a synthesis ratio of 9: 1 to 1, wherein the photoinitiator Irgacure 784 is added in a weight ratio of 4 to 6 wt% (most preferably 5 wt%).

7 is a view showing the configuration of a visible light scanning type low cost rapid prototyping apparatus using an LCD mask according to another embodiment of the present invention, Figure 8 is a visible light scanning using an LCD mask according to another embodiment of the present invention This is a graph to show the relative spectral distribution of each LED wavelength of the light source assembly constituting the low cost rapid prototyping device.

Referring to FIG. 7, the light source assembly 10 constituting the rapid prototyping apparatus 100 according to another embodiment of the present invention has an LED array 111 arranged vertically, the LED array 111. As it has a high light output to improve the processability and formability of the rapid molding apparatus (100). Here, the LED array 111 emits light in the visible light region, and as shown in FIG. 8, which is a graph showing a relative spectral power distribution for each wavelength of the LED array 111, a 4500K color temperature having a wide wavelength is shown. It is desirable to have an LED array to be used.

In addition, as the LED array 111 emits visible light at a relatively wide irradiation angle, the light source assembly 10 of the rapid prototyping apparatus 100 according to another embodiment of the present invention is disposed on the top of the LED array 111. The reflective mirror 15 and the cylinder lens 142, which is the condenser lens 14, are arranged in succession so that visible light emitted at a wide irradiation angle is focused and the LCD mask is condensed by a narrow beam of narrow width. To (31). The reflective mirror 15 is formed of a hollow cylindrical body to form a mirror surface on the inner surface so that visible light emitted from the LED array 111 at a wide irradiation angle can be focused. Here, the light source assembly 10 according to another embodiment of the present invention generates a scanning beam having a width of 1 mm or less through the reflecting mirror 15 and the cylinder lens 142.

In addition, since the LCD mask 31 constituting the dynamic shape generator 30 has a weak characteristic to heat, the light source assembly 10 of the rapid prototyping device 100 according to another embodiment of the present invention is the LED array 111 A heat sink 16 and a fan cooler 17 are installed at a lower portion thereof so that heat dissipation of the LED array 111 emitting visible light is smoothly and efficiently performed.

On the other hand, the transfer mechanism 20 constituting the rapid molding apparatus 100 according to another embodiment of the present invention, the fan belt 21 is driven by a stepping motor, so that the moving speed, the moving direction, the movement of the fan belt 21 It is possible to control the time, etc., but also to reduce the manufacturing cost of the transfer mechanism 20. Here, the fan belt 21 is driven by a pair of retainers 22 disposed at both ends in the longitudinal direction, and the fan belt 21 is installed through the belt tension regulator 23 installed at a predetermined position. If necessary, the tension of the fan belt 21 may be adjusted.

9 is a view showing the configuration of a visible light scan type low-cost rapid prototyping apparatus using an LCD mask according to another embodiment of the present invention.

9, the light source assembly 10 constituting the rapid prototyping device 100 according to another embodiment of the present invention has an LED array 111 arranged horizontally, the LED array 111. The cylindrical lens 142 ′ is disposed to be spaced apart from the front to allow the visible light to be emitted at a relatively wide irradiation angle to be focused, and the reflective plate 13 for light induction is located at a predetermined distance away from the cylinder lens 142. ) Is disposed to guide visible light transmitted from the cylinder lens 142 'to the LCD mask 31. Here, the light guide reflector 13 is formed in a flat plate shape and is disposed to be inclined at a set angle. Accordingly, visible light is guided to the LCD mask 31 through the light guide reflector 13. Here, the light guide reflector 13 has a set angle to allow visible light to be incident in the Z-axis direction on the LCD mask 31 disposed in the Y-axis direction, which passes through the LCD mask 31 to form a photocurable resin ( This is to maximize the energy of visible light input into 1). Here, a micro-meter 18 may be installed to adjust the set angle of the light guide reflecting plate 13.

In addition, a cylinder lens 142, which is a condenser lens 14, is additionally installed on the optical path of visible light incident in the Z-axis direction by the light guide reflector 13, and the cylinder lens 142 is a light guide reflector 13. By allowing the visible light induced from) to be collected once again and incident on the LCD mask 30, the light collection efficiency of the visible light induced by the LCD mask 31 may be increased.

Referring to FIG. 10, the stacking Z-axis stage 40 constituting the rapid forming apparatus 100 according to the exemplary embodiment of the present invention may move vertically by using a stepping motor 41 installed as an actuator. To this end, there is provided a configuration in which the screw 43 fixed to the bottom of the Z-axis stage 40 for insertion is inserted into the screw guide 42 which is vertically coupled with the stepping motor 41 to rotate. Accordingly, the screw 43 is vertically moved by the rotation of the screw guide 42 according to the operation of the stepping motor 41 so that the stacking Z-axis stage 40 is moved in the vertical direction.

Here, the stepping motor 41, the screw guide 42, the screw 43 is provided with a pair so that the vertical movement of the stacking Z-axis stage 40 can be made stable in the stacking Z facing each other in a diagonal direction. It may be installed in the corner portion of the shaft stage 40. In addition, the stepping motor 41, the screw guide 42, the edge of the stacking Z-axis stage 40 is not installed, the screw 45 is coupled to the spring 45 can accommodate the displacement in the vertical direction The liner guide 44 is vertically installed to minimize shaking or load of the lamination Z-axis stage 40 when the lamination Z-axis stage 40 moves up and down.

As mentioned above, although this invention was demonstrated in detail through the specific Example, this invention is not limited to the said Example, A various deformation | transformation is possible for a person with ordinary knowledge within the scope of the technical idea of this invention.

Claims

A light source assembly including a light source for emitting visible light, the light source guiding the visible light of the light source to a predetermined position;

A transport mechanism to which the light source assembly is fixed and to move the light source assembly;

A dynamic shape generator in which a pattern set for rapid prototyping is formed, and the visible light incident from the light source assembly selectively passes along the set pattern,

The light source assembly is moved by the transfer mechanism,

Visible light of the light source assembly passing through the local region of the dynamic shape generator is continuously moved in the moving direction of the light source assembly,

Visible light using an LCD mask is characterized in that the visible light of the moving light source assembly is scanned in the entire area of the dynamic shape generator to match the pattern formed in the dynamic shape generator into a photocurable resin to perform rapid molding Scan type low cost rapid forming device.
The method of claim 1,

The light source assembly includes a visible light lamp used as a light source;

A focusing reflector installed outside one side of the visible light lamp and configured to surround a portion of the visible light lamp to reflect visible light of the visible light lamp to be guided to the other side of the visible light lamp;

Visible light scanning type low cost rapid prototyping device using an LCD mask, which is installed on the other side of the visible light lamp, the light guide is disposed to be inclined at a set angle to guide the visible light to the dynamic shape generator. .
The method of claim 2,

The visible light lamp is a visible light scan type low cost rapid molding device using an LCD mask, characterized in that the LED array is used.
The method of claim 2,

The light guide reflector has a set angle to allow visible light to be incident in the Z-axis direction to the dynamic shape generator disposed in the Y-axis direction, thereby maximizing energy of visible light that passes through the dynamic shape generator to the photocurable resin. A visible light scanning type low cost rapid prototyping device using an LCD mask.
The method of claim 2,

The light source assembly may further include a condenser lens disposed on an optical path of visible light guided from the light guide reflector to the dynamic shape generator to collect visible light and to enter the dynamic shape generator. Visible light scanning type low cost rapid molding device using.
The method of claim 4, wherein

The condensing lens has a bar shape having a length corresponding to the width W of the dynamic shape generator, and is a rod-shaped lens disposed long in the X-axis direction, which is a width W direction of the dynamic shape generator. Visible light scanning type low-cost rapid molding apparatus using an LCD mask, characterized in that the.
The method of claim 5,

The rod-shaped lens is made of a glass material of a circular cross-sectional shape visible light scan type low-cost rapid molding device using an LCD mask, characterized in that to improve the light collection efficiency.
The method of claim 1,

The light source assembly has a visible light lamp which is used as a light source is disposed vertically,

The reflection mirror and the cylindrical lens of the condenser lens are arranged vertically on top of the visible light lamp so that visible light emitted at a wide irradiation angle is focused and guided to the dynamic shape generator. Light scanning, low cost rapid forming machine.
The method of claim 1,

The light source assembly is a horizontal light lamp used as a light source is arranged horizontally,

A cylinder lens is disposed to be spaced apart in front of the visible light lamp so that visible light emitted at a wide irradiation angle is focused and emitted.

Visible light using an LCD mask, characterized in that the light induction reflector is inclined at a position spaced in front of the cylinder lens inclined so that the visible light transmitted from the cylinder lens is guided to the dynamic shape generator disposed on the image side. Scan type low cost rapid forming device.
The method of claim 9,

The visible light scanning type using an LCD mask further includes a cylindrical lens which is a condenser lens installed on the optical path of the visible light guided to the dynamic shape generator by the light guide reflector to increase the condensing efficiency of the visible light. Low cost rapid molding machine.
The method of claim 1,

The light source assembly is a visible light scan type low cost rapid molding device using an LCD mask, characterized in that it comprises a heat dissipation mechanism for radiating the light source.
The method of claim 11,

The heat dissipation mechanism is a visible light scan type low cost rapid prototyping device using an LCD mask, characterized in that any one selected from a heat sink and a fan cooler.
The method of claim 1,

The light source assembly is disposed in the X-axis direction, the width (W) direction of the dynamic shape generator is fixed to the transfer mechanism,

And a conveying mechanism moves the light source assembly in a Y-axis direction in a length (L) direction of the dynamic shape generator.
The method of claim 13,

The transfer mechanism is characterized in that the pair of fan belts installed in the Y-axis direction in the longitudinal (L) direction of the dynamic shape generator is arranged spaced apart from each other on both sides of the X-axis direction in the width (W) direction of the dynamic shape generator. Visible light scanning type low cost rapid molding device using an LCD mask.
The method of claim 14,

The fan belt is driven by a stepping motor to control the moving speed, the moving direction, the movement time of the fan belt visible light scan type low cost rapid molding apparatus using an LCD mask.
The method of claim 14,

Visible scan type low-cost rapid molding apparatus using an LCD mask, characterized in that the fan belt is installed to pass through the belt tension regulator installed at a predetermined position so that the tension of the fan belt can be adjusted.
The method of claim 1,

The dynamic shape generator is an LCD (LCD) mask, characterized in that the visible light applied rapid molding apparatus using an LCD mask.
The method of claim 16,

The LCD mask is a visible light applied rapid molding apparatus using an LCD mask, characterized in that the TFT-LCD.
The method of claim 1,

Visible light applied rapid molding apparatus using an LCD mask, characterized in that the lamination Z-axis stage is provided so that the lamination of the photocurable resin can proceed.
The method of claim 19,

A stepping motor installed vertically;

A screw guide vertically coupled to the stepping motor to rotate;

The screw is fixed to the bottom surface of the Z-axis stage for lamination, and inserted into the screw guide is provided,

Visible light-type rapid molding apparatus using an LCD mask, characterized in that the vertical movement of the stacking Z-axis stage is induced while the screw is vertically moved by the rotation of the screw guide according to the operation of the stepping motor.